Merge f6b23dc4e8 into e39dc90001

Fix #5412 by using brackets and double quotes to enclose the name of
the preferences' properties and avoid issues when they contain unicode
chars

.clang-tidy

@@ -60,6 +60,8 @@ Checks: >
   -readability-uppercase-literal-suffix
 WarningsAsErrors: ''
 CheckOptions:
+  - key: readability-implicit-bool-conversion.AllowIntegerConditions
+    value: true
   - key: readability-implicit-bool-conversion.AllowPointerConditions
     value: true
   - key: misc-non-private-member-variables-in-classes.IgnoreClassesWithAllMemberVariablesBeingPublic

.github/ISSUE_TEMPLATE.md

@@ -1,9 +0,0 @@
-Describe your bug report or feature request here
-...
-...
-...
-
-### Aseprite and System version
-
-* Aseprite version: version number, installer/portable/Steam/beta/dev/commit-hash
-* System: Windows/macOS/Linux, version, distribution

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,32 @@
+---
+name: Bug report
+about: Create a report to help us improve
+title: ''
+labels: bug, triage
+assignees: ''
+
+---
+
+**Describe the bug**
+A clear and concise description of what the bug is.
+
+**To Reproduce**
+Steps to reproduce the behavior:
+1. Go to '...'
+2. Click on '....'
+3. Scroll down to '....'
+4. See error
+
+**Expected behavior**
+A clear and concise description of what you expected to happen.
+
+**Screenshots**
+If applicable, add screenshots or a screen recording to help explain your problem.
+
+**Aseprite & System (please complete the following information):**
+- Aseprite: [version number, installer/portable/Steam/beta/dev/commit-hash]
+- System: [Windows/macOS/Linux, version, distribution]
+- Extensions: [List the extensions you have installed]
+
+**Additional context**
+Add any other context about the problem here.

.github/ISSUE_TEMPLATE/feature_request.md

@@ -0,0 +1,29 @@
+---
+name: Feature request
+about: Suggest an idea for Aseprite
+title: ''
+labels: feature, triage
+assignees: ''
+
+---
+
+**Did other user suggested a similar idea?**
+- [ ] No
+- [ ] Yes/Links to similar ideas
+  > You can try to find a similar feature requests before in:
+  > - GitHub issues: https://github.com/aseprite/aseprite/issues?q=label%3Afeature
+  > - Community site: https://community.aseprite.org/c/features/7
+  > - Steam community: https://steamcommunity.com/app/431730/discussions/1/
+  > In case you find a similar feature request, making a comment there will be useful to give some traction and show interest in the feature.
+
+**Is your feature request related to a problem? Please describe.**
+A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
+
+**Describe the solution you'd like**
+A clear and concise description of what you want to happen.
+
+**Describe alternatives you've considered**
+A clear and concise description of any alternative solutions or features you've considered.
+
+**Additional context**
+Add any other context or screenshots about the feature request here.

.github/workflows/build-auto.yml

@@ -24,7 +24,8 @@ jobs:
         sudo apt-get update -qq
         sudo apt-get install -y \
           libpixman-1-dev libfreetype6-dev libharfbuzz-dev zlib1g-dev \
-          libx11-dev libxcursor-dev libxi-dev libgl1-mesa-dev libfontconfig1-dev
+          libx11-dev libxcursor-dev libxi-dev libxrandr-dev libgl1-mesa-dev \
+          libfontconfig1-dev
     - uses: aseprite/get-ninja@main
     - uses: ilammy/msvc-dev-cmd@v1
       if: runner.os == 'Windows'

.github/workflows/build.yml

@@ -28,7 +28,8 @@ jobs:
         sudo apt-get update -qq
         sudo apt-get install -y \
           libpixman-1-dev libfreetype6-dev libharfbuzz-dev zlib1g-dev \
-          libx11-dev libxcursor-dev libxi-dev libgl1-mesa-dev libfontconfig1-dev
+          libx11-dev libxcursor-dev libxi-dev libxrandr-dev libgl1-mesa-dev \
+          libfontconfig1-dev
     - name: Install Skia
       if: ${{ matrix.ui == 'gui' }}
       shell: bash

.github/workflows/clang_tidy.yml

@@ -25,7 +25,7 @@ jobs:
         apt_packages: |
           libc++-dev, libc++abi-dev, libpixman-1-dev,
           libfreetype6-dev, libharfbuzz-dev, zlib1g-dev, libx11-dev,
-          libxcursor-dev, libxi-dev, libgl1-mesa-dev
+          libxcursor-dev, libxi-dev, libxrandr-dev, libgl1-mesa-dev
         cmake_command: |
           cmake -S . -B build -DCMAKE_BUILD_TYPE=Debug -DLAF_BACKEND=none -DCMAKE_EXPORT_COMPILE_COMMANDS=on
     - uses: ZedThree/clang-tidy-review/upload@v0.20.1

.github/workflows/clang_tidy_post.yml

@@ -13,6 +13,6 @@ jobs:
   post-comments:
     runs-on: ubuntu-latest
     steps:
-    - uses: ZedThree/clang-tidy-review/post@v0.20.1
+    - uses: ZedThree/clang-tidy-review/post@v0.21.0
       with:
         token: ${{ secrets.CLANG_TIDY_TOKEN }}

AUTHORS.md

@@ -4,7 +4,7 @@ Aseprite is being developed and maintained currently by [Igara Studio](https://i
 The active team of developers is:
 
 * [David Capello](https://github.com/dacap)
-* [Gaspar Capello](https://github.com/Gsparoken)
+* [Gaspar Capello](https://github.com/Gasparoken)
 * [Martín Capello](https://github.com/martincapello)
 * [Christian Kaiser](https://github.com/ckaiser)
 * [Dante Paola](https://github.com/Liebranca)

INSTALL.md

@@ -74,7 +74,7 @@ On macOS you will need macOS 15.4 SDK and Xcode 16.3 (older versions might work)
 
 You will need the following dependencies on Ubuntu/Debian:
 
-    sudo apt-get install -y g++ clang cmake ninja-build libx11-dev libxcursor-dev libxi-dev libgl1-mesa-dev libfontconfig1-dev
+    sudo apt-get install -y g++ clang cmake ninja-build libx11-dev libxcursor-dev libxi-dev libxrandr-dev libgl1-mesa-dev libfontconfig1-dev
 
 Or use clang-12 packages (or newer) in case that clang in your distribution is older than clang 12.0:
 
@@ -82,15 +82,15 @@ Or use clang-12 packages (or newer) in case that clang in your distribution is o
 
 On Fedora:
 
-    sudo dnf install -y gcc-c++ clang libcxx-devel cmake ninja-build libX11-devel libXcursor-devel libXi-devel mesa-libGL-devel fontconfig-devel
+    sudo dnf install -y gcc-c++ clang libcxx-devel cmake ninja-build libX11-devel libXcursor-devel libXi-devel libXrandr-devel mesa-libGL-devel fontconfig-devel
 
 On Arch:
 
-    sudo pacman -S gcc clang cmake ninja libx11 libxcursor mesa-libgl fontconfig libwebp
+    sudo pacman -S gcc clang cmake ninja libx11 libxcursor libxi libxrandr mesa-libgl fontconfig libwebp
 
 On SUSE:
 
-    sudo zypper install gcc-c++ clang cmake ninja libX11-devel libXcursor-devel libXi-devel Mesa-libGL-devel fontconfig-devel
+    sudo zypper install gcc-c++ clang cmake ninja libX11-devel libXcursor-devel libXi-devel libXrandr-devel Mesa-libGL-devel fontconfig-devel
 
 # Automatic Building
 

build.sh

@@ -428,9 +428,17 @@ if [ ! -d "$skia_library_dir" ] ; then
         skia_url=$(bash laf/misc/skia-url.sh $skia_build)
         skia_file=$(basename $skia_url)
         if [ ! -f "$skia_dir/$skia_file" ] ; then
+            if ! command -v curl >/dev/null 2>&1 ; then
+                echo "Error: 'curl' command line tool is not available in PATH"
+                exit 1
+            fi
             curl --ssl-revoke-best-effort -L -o "$skia_dir/$skia_file" "$skia_url"
         fi
         if [ ! -d "$skia_library_dir" ] ; then
+            if ! command -v unzip >/dev/null 2>&1 ; then
+                echo "Error: 'unzip' command line tool is not available in PATH"
+                exit 1
+            fi
             unzip -n -d "$skia_dir" "$skia_dir/$skia_file"
         fi
     else

cmake/FindHarfBuzz.cmake

@@ -30,7 +30,7 @@
 # HARFBUZZ_INCLUDE_DIRS - containg the HarfBuzz headers
 # HARFBUZZ_LIBRARIES - containg the HarfBuzz library
 
-include(FindPkgConfig)
+find_package(PkgConfig QUIET)
 
 pkg_check_modules(PC_HARFBUZZ harfbuzz>=0.9.7)
 

data/fonts/fonts.xml

@@ -34,14 +34,14 @@
         type="spritesheet"
         descent="2"
         file="aseprite_font.png">
-    <fallback font="Unicode" size="8" />
+    <fallback font="Unicode" size="14" />
   </font>
 
   <font name="Aseprite Mini"
         type="spritesheet"
         descent="1"
         file="aseprite_mini.png">
-    <fallback font="Unicode" size="6" />
+    <fallback font="Unicode" size="10" />
   </font>
 
 </fonts>

data/gui.xml

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <!-- Aseprite -->
-<!-- Copyright (C) 2018-2024  Igara Studio S.A. -->
+<!-- Copyright (C) 2018-2025  Igara Studio S.A. -->
 <!-- Copyright (C) 2001-2018  David Capello -->
 <gui>
   <!-- Keyboard shortcuts -->
@@ -371,6 +371,12 @@
         <param name="quantity" value="1" />
       </key>
 
+      <!-- Main selection actions (apply transformation / undo) -->
+      <key command="DeselectMask" shortcut="Esc" context="Transformation" />
+      <key command="Apply" shortcut="Enter" context="Transformation" />
+      <key command="Apply" shortcut="Enter Pad" context="Transformation" />
+      <key command="Undo" shortcut="Ctrl+Z" mac="Cmd+Z" context="Transformation" />
+
       <!-- Move selection with arrows -->
       <key command="MoveMask" shortcut="Left" context="Selection">
         <param name="target" value="content" />
@@ -1203,6 +1209,7 @@
 
     <menu id="slice_popup_menu">
       <item command="SliceProperties" text="@.properties" group="slice_popup_properties" />
+      <item command="DuplicateSlice" text="@.duplicate" group="slice_popup_duplicate" />
       <item command="RemoveSlice" text="@.delete" group="slice_popup_delete" />
     </menu>
 

data/pref.xml

@@ -356,6 +356,7 @@
     <section id="file_selector">
       <option id="current_folder" type="std::string" default="&quot;&lt;empty&gt;&quot;" />
       <option id="zoom" type="double" default="1.0" />
+      <option id="show_hidden" type="bool" default="false" />
     </section>
     <section id="text_tool">
       <option id="font_face" type="std::string" />

data/strings/en.ini

@@ -206,6 +206,7 @@ AddColor_Background = Background
 AddColor_Foreground = Foreground
 AddColor_Specific = Specific
 AdvancedMode = Advanced Mode
+Apply = Apply
 AutocropSprite = Trim Sprite
 AutocropSprite_ByGrid = Trim Sprite by Grid
 BackgroundFromLayer = Background from Layer
@@ -265,6 +266,7 @@ Despeckle = Despeckle
 DeveloperConsole = Developer Console
 DiscardBrush = Discard Brush
 DuplicateLayer = Duplicate Layer
+DuplicateSlice = Duplicate Slice
 DuplicateSprite = Duplicate Sprite
 DuplicateView = Duplicate View
 Exit = Exit
@@ -581,8 +583,9 @@ rotsprite = RotSprite
 pixel_perfect = Pixel-perfect
 linear_gradient = Linear Gradient
 radial_gradient = Radial Gradient
-drop_pixel = Drop pixels here (Enter)
-cancel_drag = Cancel drag and drop (Esc)
+drop_pixel_and_deselect = Apply transformation and deselect
+drop_pixel = Apply transformation and keep selection
+cancel_drag = Cancel transformation and undo/discard changes
 auto_select_layer = Auto Select Layer
 all = All
 none = None
@@ -621,6 +624,14 @@ current_layer = Current Layer
 first_ref_layer = First Reference Layer
 pick = Pick:
 sample = Sample:
+position_label = P:
+rotation_label = R:
+position_x = X Position
+position_y = Y Position
+size_width = Width
+size_height = Height
+rotation_angle = Angle
+rotation_skew = Skew
 
 [convolution_matrix]
 reload_stock = &Reload Stock
@@ -765,6 +776,7 @@ pinned_folders = Pinned Folders
 recent_folders = Recent Folders
 all_formats = All formats
 all_files = All files
+show_hidden = Show hidden
 
 [filters]
 selected_cels = Selected
@@ -788,7 +800,22 @@ empty_fonts = No system fonts were found
 [font_style]
 antialias = Antialias
 hinting = Hinting
+hinting_none = No Hinting
+hinting_slight = Slight Hinting
+hinting_full = Full Hinting
 ligatures = Ligatures
+font_weight = Font Weight
+italic = Italic
+font_weight_100 = Thin
+font_weight_200 = Extra Light
+font_weight_300 = Light
+font_weight_400 = Normal
+font_weight_500 = Medium
+font_weight_600 = Semi Bold
+font_weight_700 = Bold
+font_weight_800 = Extra Bold
+font_weight_900 = Black
+font_weight_1000 = Extra Black
 
 [frame_combo]
 all_frames = All frames
@@ -816,6 +843,7 @@ same_in_all_tools = Same in all Tools
 opacity = Opacity:
 tolerance = Tolerance:
 show_more = Show more...
+copy_of = {} Copy
 
 [general_text]
 copy = &Copy
@@ -956,6 +984,7 @@ key_context_move_tool = Move Tool
 key_context_freehand_tool = Freehand Tool
 key_context_shape_tool = Shape Tool
 key_context_frames_selection = Frames Selection
+key_context_transformation = Transformation
 copy_selection = Copy Selection
 snap_to_grid = Snap To Grid
 lock_axis = Lock Axis
@@ -1663,6 +1692,10 @@ from = From:
 to = To:
 tolerance = Tolerance:
 
+[duplicate_slice]
+x_duplicated = Slice "{}" duplicated
+n_slices_duplicated = {} slice(s) duplicated
+
 [remove_slice]
 x_removed = Slice "{}" removed
 n_slices_removed = {} slice(s) removed
@@ -1692,7 +1725,8 @@ title = Save Selection (.msk file)
 [script_access]
 title = Security
 script_label = The following script:
-file_label = wants to access to this file:
+file_label = wants to access this file:
+file_write_label = wants to write to this file:
 command_label = wants to execute the following command:
 websocket_label = wants to open a WebSocket connection to this URL:
 clipboard_label = wants to access the system clipboard
@@ -1706,7 +1740,7 @@ allow_load_lib_access = &Allow Load External Library
 give_full_access = Give Script Full &Access
 stop_script = &Stop Script
 
-[select_accelerator]
+[select_shortcut]
 title = Keyboard Shortcut
 key = Key:
 clear = Clear
@@ -1746,6 +1780,7 @@ delete_file = Delete file, I've already sent it
 
 [slice_popup_menu]
 properties = Slice &Properties...
+duplicate = D&uplicate Slice
 delete = &Delete Slice
 
 [slice_properties]
@@ -1833,6 +1868,18 @@ pixel_scale = Pixel Scale
 with_vars = Use CSS3 Variables
 generate_html = Generate Sample HTML File
 
+[shape]
+fill = Fill
+stroke = Stroke
+stroke_width = Stroke Width
+
+[text_tool]
+font_family = Font Family
+font_size = Font Size
+bold = Bold
+italic = Italic
+more_options = More Options
+
 [timeline_conf]
 position = Position:
 left = &Left
@@ -1895,6 +1942,7 @@ timeline_show = Show Timeline
 
 [undo_history]
 title = Undo History
+initial_state = Initial State
 
 [user_data]
 user_data = User Data:

data/widgets/file_selector.xml

@@ -23,6 +23,7 @@
       <combobox id="location" expansive="true" />
       <button text="" id="refresh_button" style="refresh_button"
                 tooltip="@.refresh_button_tooltip" tooltip_dir="bottom" />
+      <check id="show_hidden_check" text="@.show_hidden" />
     </box>
     <vbox id="file_view_placeholder" expansive="true" />
     <grid columns="2">

data/widgets/select_shortcut.xml

@@ -1,7 +1,8 @@
 <!-- Aseprite -->
+<!-- Copyright (C) 2025 by Igara Studio S.A. -->
 <!-- Copyright (C) 2001-2016 by David Capello -->
 <gui>
-  <window id="select_accelerator" text="@.title">
+  <window id="select_shortcut" text="@.title">
     <vbox expansive="true">
       <grid columns="3">
         <label text="@.key" />

data/widgets/slice_properties.xml

@@ -1,17 +1,17 @@
 <?xml version="1.0" encoding="utf-8"?>
 <!-- Aseprite -->
-<!-- Copyright (C) 2019-2024  Igara Studio S.A. -->
+<!-- Copyright (C) 2019-2025  Igara Studio S.A. -->
 <!-- Copyright (C) 2017-2018  David Capello -->
 <gui>
 <window id="slice_properties" text="@.title" help="slices#slice-properties">
-  <vbox>
+  <vbox expansive="true">
     <grid id="properties_grid" columns="3">
       <label id="label1" text="@.name" />
       <entry id="name" maxsize="256" magnet="true" cell_align="horizontal" expansive="true" />
       <button id="user_data" icon="icon_user_data" maxsize="32" tooltip="@.user_data_tooltip" />
     </grid>
-    <grid columns="2">
-      <separator horizontal="true" cell_hspan="2" />
+    <grid columns="3" expansive="true">
+      <separator horizontal="true" cell_hspan="3" />
 
       <box />
       <hbox homogeneous="true">
@@ -20,6 +20,7 @@
         <label text="@.width" />
         <label text="@.height" />
       </hbox>
+      <boxfiller cell_align="horizontal" />
 
       <label text="@.bounds" />
       <hbox homogeneous="true">
@@ -28,6 +29,7 @@
         <expr id="bounds_w" />
         <expr id="bounds_h" />
       </hbox>
+      <boxfiller />
 
       <check text="@.center" id="center" />
       <hbox homogeneous="true">
@@ -36,16 +38,18 @@
         <expr id="center_w" />
         <expr id="center_h" />
       </hbox>
+      <boxfiller />
 
       <check text="@.pivot" id="pivot" />
       <hbox>
         <expr id="pivot_x" />
         <expr id="pivot_y" />
       </hbox>
+      <boxfiller />
 
-      <separator horizontal="true" cell_hspan="2" />
-
-      <hbox cell_hspan="2">
+      <boxfiller cell_align="vertical" cell_hspan="3" />
+      <separator horizontal="true" cell_hspan="3" cell_align="horizontal" />
+      <hbox cell_hspan="3">
         <boxfiller />
         <hbox homogeneous="true">
           <button text="@general.ok" closewindow="true" id="ok" magnet="true" minwidth="60" />

data/widgets/tag_properties.xml

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <!-- Aseprite -->
-<!-- Copyright (C) 2019-2021  Igara Studio S.A. -->
+<!-- Copyright (C) 2019-2025  Igara Studio S.A. -->
 <!-- Copyright (C) 2015-2018  David Capello -->
 <gui>
 <window id="tag_properties" text="@.title">
@@ -23,13 +23,14 @@
       <check text="@.repeat" id="limit_repeat" />
       <vbox id="repeat_placeholder" cell_hspan="2" />
     </grid>
+    <boxfiller />
     <grid columns="2">
-      <separator horizontal="true" cell_hspan="2" minwidth="180" />
+      <separator horizontal="true" cell_align="horizontal" cell_hspan="2" minwidth="180" />
 
-      <box horizontal="true" homogeneous="true" cell_hspan="2" cell_align="right">
+      <hbox homogeneous="true" cell_hspan="2" cell_align="right">
         <button text="@general.ok" closewindow="true" id="ok" magnet="true" minwidth="60" />
         <button text="@general.cancel" closewindow="true" />
-      </box>
+      </hbox>
     </grid>
   </vbox>
 </window>

laf

@@ -1 +1 @@
-Subproject commit 282764015c0f2279c814ee8f32b91b245ac6659a
+Subproject commit de781a5066732d700ac4520ee5fc9034e92875ad

src/CMakeLists.txt

@@ -180,8 +180,8 @@ if(ENABLE_ASEPRITE_EXE)
 
   if(WIN32)
     set(main_resources
-      main/resources_win32.rc
-      main/settings.manifest)
+      main/win/resources_win32.rc
+      main/win/settings.manifest)
   endif()
 
   add_executable(${main_target}
@@ -220,6 +220,7 @@ if(ENABLE_TESTS)
   find_tests(ui ui-lib)
   find_tests(app/cli app-lib)
   find_tests(app/file app-lib)
+  find_tests(app/ui app-lib)
   find_tests(app app-lib)
   find_tests(. app-lib)
 endif()

src/README.md

@@ -72,6 +72,10 @@ In Debug mode (`_DEBUG`):
 * [`TRACEARGS`](https://github.com/aseprite/laf/blob/f3222bdee2d21556e9da55343e73803c730ecd97/base/debug.h#L40):
   in debug mode, it prints in the terminal/console each given argument
 
+In release mode you can use a similar function:
+
+* `PRINTARGS` prints in the terminal/console each given argument
+
 # Detect Platform
 
 You can check the platform using some `laf` macros:

src/app/CMakeLists.txt

@@ -74,7 +74,7 @@ add_custom_command(
   COMMAND ${CMAKE_COMMAND} -E copy_if_different ${output_fn}.tmp ${output_fn}
   WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
   MAIN_DEPENDENCY ${strings_en_ini}
-  DEPENDS ${GEN_DEP})
+  DEPENDS ${GEN_DEP} commands/commands_list.h)
 list(APPEND generated_files ${output_fn})
 
 # Check translations
@@ -108,7 +108,7 @@ endif()
 # This defines a specific webp decoding utility function for using
 # in Windows when dragging and dropping images that are stored as
 # webp files (like Chrome does).
-if(WIN32 AND ENABLE_WEBP)
+if(WIN32 AND ENABLE_WEBP AND LAF_BACKEND STREQUAL "skia")
   target_sources(app-lib PRIVATE util/decode_webp.cpp)
 endif()
 
@@ -290,7 +290,6 @@ target_sources(app-lib PRIVATE
   cmd/copy_region.cpp
   cmd/crop_cel.cpp
   cmd/deselect_mask.cpp
-  cmd/drop_on_timeline.cpp
   cmd/flatten_layers.cpp
   cmd/flip_image.cpp
   cmd/flip_mask.cpp
@@ -369,6 +368,7 @@ target_sources(app-lib PRIVATE
   color_picker.cpp
   color_spaces.cpp
   color_utils.cpp
+  commands/apply.cpp
   commands/cmd_about.cpp
   commands/cmd_add_color.cpp
   commands/cmd_advanced_mode.cpp
@@ -394,6 +394,7 @@ target_sources(app-lib PRIVATE
   commands/cmd_deselect_mask.cpp
   commands/cmd_discard_brush.cpp
   commands/cmd_duplicate_layer.cpp
+  commands/cmd_duplicate_slice.cpp
   commands/cmd_duplicate_sprite.cpp
   commands/cmd_duplicate_view.cpp
   commands/cmd_enter_license.cpp
@@ -526,6 +527,7 @@ target_sources(app-lib PRIVATE
   context_flags.cpp
   doc.cpp
   doc_api.cpp
+  doc_api_dnd_helper.cpp
   doc_diff.cpp
   doc_exporter.cpp
   doc_range_ops.cpp
@@ -651,6 +653,7 @@ target_sources(app-lib PRIVATE
   ui/icon_button.cpp
   ui/incompat_file_window.cpp
   ui/input_chain.cpp
+  ui/key.cpp
   ui/keyboard_shortcuts.cpp
   ui/layer_frame_comboboxes.cpp
   ui/main_menu_bar.cpp
@@ -669,7 +672,7 @@ target_sources(app-lib PRIVATE
   ui/rgbmap_algorithm_selector.cpp
   ui/sampling_selector.cpp
   ui/search_entry.cpp
-  ui/select_accelerator.cpp
+  ui/select_shortcut.cpp
   ui/selection_mode_field.cpp
   ui/skin/skin_part.cpp
   ui/skin/skin_property.cpp
@@ -684,6 +687,7 @@ target_sources(app-lib PRIVATE
   ui/tile_button.cpp
   ui/tileset_selector.cpp
   ui/timeline/ani_controls.cpp
+  ui/timeline/doc_providers.cpp
   ui/timeline/timeline.cpp
   ui/toolbar.cpp
   ui/user_data_view.cpp
@@ -706,6 +710,7 @@ target_sources(app-lib PRIVATE
   util/layer_utils.cpp
   util/msk_file.cpp
   util/new_image_from_mask.cpp
+  util/open_file_job.cpp
   util/pal_ops.cpp
   util/pic_file.cpp
   util/pixel_ratio.cpp
@@ -713,6 +718,7 @@ target_sources(app-lib PRIVATE
   util/render_text.cpp
   util/resize_image.cpp
   util/shader_helpers.cpp
+  util/slice_utils.cpp
   util/tile_flags_utils.cpp
   util/tileset_utils.cpp
   util/wrap_point.cpp

src/app/app.cpp

@@ -1,5 +1,5 @@
 // Aseprite
-// Copyright (C) 2018-2024  Igara Studio S.A.
+// Copyright (C) 2018-2025  Igara Studio S.A.
 // Copyright (C) 2001-2018  David Capello
 //
 // This program is distributed under the terms of
@@ -79,7 +79,7 @@
   #include "os/x11/system.h"
 #endif
 
-#if ENABLE_WEBP && LAF_WINDOWS
+#if ENABLE_WEBP && LAF_WINDOWS && LAF_SKIA
   #include "app/util/decode_webp.h"
 #endif
 
@@ -485,7 +485,7 @@ void App::run(const bool runGuiManager)
     // How to interpret one finger on Windows tablets.
     manager->display()->nativeWindow()->setInterpretOneFingerGestureAsMouseMovement(
       preferences().experimental.oneFingerAsMouseMovement());
-  #if ENABLE_WEBP
+  #if ENABLE_WEBP && LAF_SKIA
     // In Windows we use a custom webp decoder for drag & drop operations.
     os::set_decode_webp(util::decode_webp);
   #endif

src/app/app_menus.cpp

@@ -113,11 +113,11 @@ bool can_call_global_shortcut(const AppMenuItem::Native* native)
     (focus == nullptr || focus->type() != ui::kEntryWidget ||
      !is_text_entry_shortcut(native->shortcut)) &&
     (native->keyContext == KeyContext::Any ||
-     native->keyContext == KeyboardShortcuts::instance()->getCurrentKeyContext());
+     native->keyContext == KeyboardShortcuts::getCurrentKeyContext());
 }
 
-// TODO this should be on "she" library (or we should use
-// os::Shortcut instead of ui::Accelerators)
+// TODO this should be on laf-os library (or we should use
+// os::Shortcut instead of ui::Shortcuts)
 int from_scancode_to_unicode(KeyScancode scancode)
 {
   static int map[] = {
@@ -284,22 +284,21 @@ void destroy_menu_item(ui::Widget* item)
 
 os::Shortcut get_os_shortcut_from_key(const Key* key)
 {
-  if (key && !key->accels().empty()) {
-    const ui::Accelerator& accel = key->accels().front();
+  if (key && !key->shortcuts().empty()) {
+    const ui::Shortcut& shortcut = key->shortcuts().front();
 
 #if LAF_MACOS
     // Shortcuts with spacebar as modifier do not work well in macOS
     // (they will be called when the space bar is unpressed too).
-    if ((accel.modifiers() & ui::kKeySpaceModifier) == ui::kKeySpaceModifier)
+    if ((shortcut.modifiers() & ui::kKeySpaceModifier) == ui::kKeySpaceModifier)
       return os::Shortcut();
 #endif
 
-    return os::Shortcut(
-      (accel.unicodeChar() ? accel.unicodeChar() : from_scancode_to_unicode(accel.scancode())),
-      accel.modifiers());
+    return os::Shortcut((shortcut.unicodeChar() ? shortcut.unicodeChar() :
+                                                  from_scancode_to_unicode(shortcut.scancode())),
+                        shortcut.modifiers());
   }
-  else
-    return os::Shortcut();
+  return {};
 }
 
 AppMenus* AppMenus::s_instance = nullptr;

src/app/cmd/drop_on_timeline.cpp

@@ -1,397 +0,0 @@
-// Aseprite
-// Copyright (C) 2024  Igara Studio S.A.
-//
-// This program is distributed under the terms of
-// the End-User License Agreement for Aseprite.
-
-#ifdef HAVE_CONFIG_H
-  #include "config.h"
-#endif
-
-#include "app/cmd/drop_on_timeline.h"
-
-#include "app/cmd/add_layer.h"
-#include "app/cmd/move_cel.h"
-#include "app/cmd/set_pixel_format.h"
-#include "app/console.h"
-#include "app/context_flags.h"
-#include "app/doc.h"
-#include "app/doc_event.h"
-#include "app/file/file.h"
-#include "app/tx.h"
-#include "app/util/layer_utils.h"
-#include "app/util/open_file_job.h"
-#include "base/serialization.h"
-#include "doc/layer_io.h"
-#include "doc/layer_list.h"
-#include "doc/subobjects_io.h"
-#include "render/dithering.h"
-
-#include <algorithm>
-
-namespace app { namespace cmd {
-
-using namespace base::serialization::little_endian;
-
-DropOnTimeline::DropOnTimeline(app::Doc* doc,
-                               doc::frame_t frame,
-                               doc::layer_t layerIndex,
-                               InsertionPoint insert,
-                               DroppedOn droppedOn,
-                               const base::paths& paths)
-  : WithDocument(doc)
-  , m_size(0)
-  , m_paths(paths)
-  , m_frame(frame)
-  , m_layerIndex(layerIndex)
-  , m_insert(insert)
-  , m_droppedOn(droppedOn)
-{
-  ASSERT(m_layerIndex >= 0);
-  for (const auto& path : m_paths)
-    m_size += path.size();
-
-  // Zero layers stored.
-  write32(m_stream, 0);
-  m_size += sizeof(uint32_t);
-}
-
-DropOnTimeline::DropOnTimeline(app::Doc* doc,
-                               doc::frame_t frame,
-                               doc::layer_t layerIndex,
-                               InsertionPoint insert,
-                               DroppedOn droppedOn,
-                               const doc::ImageRef& image)
-  : WithDocument(doc)
-  , m_size(0)
-  , m_image(image)
-  , m_frame(frame)
-  , m_layerIndex(layerIndex)
-  , m_insert(insert)
-  , m_droppedOn(droppedOn)
-{
-  ASSERT(m_layerIndex >= 0);
-
-  // Zero layers stored.
-  write32(m_stream, 0);
-  m_size += sizeof(uint32_t);
-}
-
-void DropOnTimeline::onExecute()
-{
-  Doc* destDoc = document();
-  m_previousTotalFrames = destDoc->sprite()->totalFrames();
-
-  int docsProcessed = 0;
-  while (hasPendingWork()) {
-    std::unique_ptr<Doc> srcDoc;
-    if (!getNextDoc(srcDoc))
-      return;
-
-    if (srcDoc) {
-      docsProcessed++;
-      // If source document doesn't match the destination document's color
-      // mode, change it.
-      if (srcDoc->colorMode() != destDoc->colorMode()) {
-        // Execute in a source doc transaction because we don't need undo/redo
-        // this.
-        Tx tx(srcDoc.get());
-        tx(new cmd::SetPixelFormat(srcDoc->sprite(),
-                                   destDoc->sprite()->pixelFormat(),
-                                   render::Dithering(),
-                                   Preferences::instance().quantization.rgbmapAlgorithm(),
-                                   nullptr,
-                                   nullptr,
-                                   FitCriteria::DEFAULT));
-        tx.commit();
-      }
-
-      // If there is only one source document to process and it has a cel that
-      // can be moved, then move the cel from the source doc into the
-      // destination doc's selected frame.
-      const bool isJustOneDoc = (docsProcessed == 1 && !hasPendingWork());
-      if (isJustOneDoc && canMoveCelFrom(srcDoc.get())) {
-        auto* srcLayer = static_cast<LayerImage*>(srcDoc->sprite()->firstLayer());
-        auto* destLayer = static_cast<LayerImage*>(destDoc->sprite()->allLayers()[m_layerIndex]);
-        executeAndAdd(new MoveCel(srcLayer, 0, destLayer, m_frame, false));
-        break;
-      }
-
-      // If there is no room for the source frames, add frames to the
-      // destination sprite.
-      if (m_frame + srcDoc->sprite()->totalFrames() > destDoc->sprite()->totalFrames()) {
-        destDoc->sprite()->setTotalFrames(m_frame + srcDoc->sprite()->totalFrames());
-      }
-
-      // Save dropped layers from source document.
-      saveDroppedLayers(srcDoc->sprite()->root()->layers(), destDoc->sprite());
-    }
-  }
-
-  if (m_droppedLayersIds.empty())
-    return;
-
-  destDoc->sprite()->incrementVersion();
-  destDoc->incrementVersion();
-
-  insertDroppedLayers();
-}
-
-void DropOnTimeline::onUndo()
-{
-  CmdSequence::onUndo();
-
-  if (m_droppedLayersIds.empty()) {
-    notifyGeneralUpdate();
-    return;
-  }
-
-  Doc* doc = document();
-  frame_t currentTotalFrames = doc->sprite()->totalFrames();
-
-  for (auto id : m_droppedLayersIds) {
-    auto* layer = doc::get<Layer>(id);
-    ASSERT(layer);
-    if (layer) {
-      DocEvent ev(doc);
-      ev.sprite(layer->sprite());
-      ev.layer(layer);
-      doc->notify_observers<DocEvent&>(&DocObserver::onBeforeRemoveLayer, ev);
-
-      LayerGroup* group = layer->parent();
-      group->removeLayer(layer);
-      group->incrementVersion();
-      group->sprite()->incrementVersion();
-
-      doc->notify_observers<DocEvent&>(&DocObserver::onAfterRemoveLayer, ev);
-
-      delete layer;
-    }
-  }
-  doc->sprite()->setTotalFrames(m_previousTotalFrames);
-  doc->sprite()->incrementVersion();
-  m_previousTotalFrames = currentTotalFrames;
-}
-
-void DropOnTimeline::onRedo()
-{
-  CmdSequence::onRedo();
-
-  if (m_droppedLayersIds.empty()) {
-    notifyGeneralUpdate();
-    return;
-  }
-
-  Doc* doc = document();
-  frame_t currentTotalFrames = doc->sprite()->totalFrames();
-  doc->sprite()->setTotalFrames(m_previousTotalFrames);
-  doc->sprite()->incrementVersion();
-  m_previousTotalFrames = currentTotalFrames;
-
-  insertDroppedLayers();
-}
-
-void DropOnTimeline::setupInsertionLayer(Layer*& layer, LayerGroup*& group)
-{
-  const LayerList& allLayers = document()->sprite()->allLayers();
-  layer = allLayers[m_layerIndex];
-  if (m_insert == InsertionPoint::BeforeLayer && layer->isGroup()) {
-    group = static_cast<LayerGroup*>(layer);
-    // The user is trying to drop layers into an empty group, so there is no after
-    // nor before layer...
-    if (group->layersCount() == 0) {
-      layer = nullptr;
-      return;
-    }
-    layer = group->lastLayer();
-    m_insert = InsertionPoint::AfterLayer;
-  }
-
-  group = layer->parent();
-}
-
-bool DropOnTimeline::hasPendingWork()
-{
-  return m_image || !m_paths.empty();
-}
-
-bool DropOnTimeline::getNextDocFromImage(std::unique_ptr<Doc>& srcDoc)
-{
-  if (!m_image)
-    return true;
-
-  Sprite* sprite = new Sprite(m_image->spec(), 256);
-  LayerImage* layer = new LayerImage(sprite);
-  sprite->root()->addLayer(layer);
-  Cel* cel = new Cel(0, m_image);
-  layer->addCel(cel);
-  srcDoc = std::make_unique<Doc>(sprite);
-  m_image = nullptr;
-  return true;
-}
-
-bool DropOnTimeline::getNextDocFromPaths(std::unique_ptr<Doc>& srcDoc)
-{
-  Console console;
-  Context* context = document()->context();
-  int flags = FILE_LOAD_DATA_FILE | FILE_LOAD_AVOID_BACKGROUND_LAYER | FILE_LOAD_CREATE_PALETTE |
-              FILE_LOAD_SEQUENCE_YES;
-
-  std::unique_ptr<FileOp> fop(FileOp::createLoadDocumentOperation(context, m_paths.front(), flags));
-  // Remove the path that is currently being processed
-  m_paths.erase(m_paths.begin());
-
-  // Do nothing (the user cancelled or something like that)
-  if (!fop)
-    return false;
-
-  if (fop->hasError()) {
-    console.printf(fop->error().c_str());
-    return true;
-  }
-
-  base::paths fopFilenames;
-  fop->getFilenameList(fopFilenames);
-  // Remove paths that will be loaded by the current file operation.
-  for (const auto& filename : fopFilenames) {
-    auto it = std::find(m_paths.begin(), m_paths.end(), filename);
-    if (it != m_paths.end())
-      m_paths.erase(it);
-  }
-
-  OpenFileJob task(fop.get(), true);
-  task.showProgressWindow();
-
-  // Post-load processing, it is called from the GUI because may require user intervention.
-  fop->postLoad();
-
-  // Show any error
-  if (fop->hasError() && !fop->isStop())
-    console.printf(fop->error().c_str());
-
-  srcDoc.reset(fop->releaseDocument());
-  return true;
-}
-
-bool DropOnTimeline::getNextDoc(std::unique_ptr<Doc>& srcDoc)
-{
-  if (m_image == nullptr && !m_paths.empty())
-    return getNextDocFromPaths(srcDoc);
-
-  return getNextDocFromImage(srcDoc);
-}
-
-void DropOnTimeline::storeDroppedLayerIds(const Layer* layer)
-{
-  if (layer->isGroup()) {
-    const auto* group = static_cast<const LayerGroup*>(layer);
-    for (auto* child : group->layers())
-      storeDroppedLayerIds(child);
-
-    m_droppedLayersIds.push_back(group->id());
-  }
-  else {
-    m_droppedLayersIds.push_back(layer->id());
-  }
-}
-
-void DropOnTimeline::saveDroppedLayers(const LayerList& layers, Sprite* sprite)
-{
-  size_t start = m_stream.tellp();
-
-  // Calculate the new number of layers.
-  m_stream.seekg(0);
-  uint32_t nLayers = read32(m_stream) + layers.size();
-
-  // Flat list of all the dropped layers.
-  LayerList allDroppedLayers;
-  // Write number of layers (at the beginning of the stream).
-  m_stream.seekp(0);
-  write32(m_stream, nLayers);
-  // Move to where we must start writing.
-  m_stream.seekp(start);
-  for (auto it = layers.cbegin(); it != layers.cend(); ++it) {
-    auto* layer = *it;
-    // TODO: If we could "relocate" a layer from the source document to the
-    // destination document we could avoid making a copy here.
-    std::unique_ptr<Layer> layerCopy(copy_layer_with_sprite(layer, sprite));
-    layerCopy->displaceFrames(0, m_frame);
-
-    write_layer(m_stream, layerCopy.get());
-
-    storeDroppedLayerIds(layerCopy.get());
-  }
-  size_t end = m_stream.tellp();
-  m_size += end - start;
-}
-
-void DropOnTimeline::insertDroppedLayers()
-{
-  // Layer used as a reference to determine if the dropped layers will be
-  // inserted after or before it.
-  Layer* refLayer = nullptr;
-  // Parent group of the reference layer layer.
-  LayerGroup* group = nullptr;
-  // Keep track of the current insertion point.
-  InsertionPoint insert = m_insert;
-
-  setupInsertionLayer(refLayer, group);
-
-  SubObjectsFromSprite io(group->sprite());
-  m_stream.seekg(0);
-  auto nLayers = read32(m_stream);
-  for (int i = 0; i < nLayers; ++i) {
-    auto* layer = read_layer(m_stream, &io);
-
-    if (!refLayer) {
-      group->addLayer(layer);
-      refLayer = layer;
-      insert = InsertionPoint::AfterLayer;
-    }
-    else if (insert == InsertionPoint::AfterLayer) {
-      group->insertLayer(layer, refLayer);
-      refLayer = layer;
-    }
-    else if (insert == InsertionPoint::BeforeLayer) {
-      group->insertLayerBefore(layer, refLayer);
-      refLayer = layer;
-      insert = InsertionPoint::AfterLayer;
-    }
-
-    group->incrementVersion();
-    group->sprite()->incrementVersion();
-
-    Doc* doc = static_cast<Doc*>(group->sprite()->document());
-    DocEvent ev(doc);
-    ev.sprite(group->sprite());
-    ev.layer(layer);
-    doc->notify_observers<DocEvent&>(&DocObserver::onAddLayer, ev);
-  }
-}
-
-// Returns true if the document srcDoc has a cel that can be moved.
-// The cel from the srcDoc can be moved only when all of the following
-// conditions are met:
-// * Drop took place in a cel.
-// * Source doc has only one layer with just one frame.
-// * The layer from the source doc and the destination cel's layer are both
-// Image layers.
-// Otherwise this function returns false.
-bool DropOnTimeline::canMoveCelFrom(app::Doc* srcDoc)
-{
-  auto* srcLayer = srcDoc->sprite()->firstLayer();
-  auto* destLayer = document()->sprite()->allLayers()[m_layerIndex];
-  return m_droppedOn == DroppedOn::Cel && srcDoc->sprite()->allLayersCount() == 1 &&
-         srcDoc->sprite()->totalFrames() == 1 && srcLayer->isImage() && destLayer->isImage();
-}
-
-void DropOnTimeline::notifyGeneralUpdate()
-{
-  Doc* doc = document();
-  if (!doc)
-    return;
-
-  doc->notifyGeneralUpdate();
-}
-
-}} // namespace app::cmd

src/app/cmd/drop_on_timeline.h

@@ -1,95 +0,0 @@
-// Aseprite
-// Copyright (C) 2024 Igara Studio S.A.
-//
-// This program is distributed under the terms of
-// the End-User License Agreement for Aseprite.
-
-#ifndef APP_CMD_drop_on_timeline_H_INCLUDED
-#define APP_CMD_drop_on_timeline_H_INCLUDED
-#pragma once
-
-#include "app/cmd/with_document.h"
-#include "app/cmd_sequence.h"
-#include "app/doc_observer.h"
-#include "base/paths.h"
-#include "doc/frame.h"
-#include "doc/image_ref.h"
-#include "doc/layer.h"
-#include "doc/layer_list.h"
-
-namespace app { namespace cmd {
-
-class DropOnTimeline : public CmdSequence,
-                       public WithDocument {
-public:
-  enum class InsertionPoint {
-    BeforeLayer,
-    AfterLayer,
-  };
-
-  enum class DroppedOn {
-    Unspecified,
-    Frame,
-    Layer,
-    Cel,
-  };
-
-  // Inserts the layers and frames of the documents pointed by the specified
-  // paths, at the specified frame and before or after the specified layer index.
-  DropOnTimeline(app::Doc* doc,
-                 doc::frame_t frame,
-                 doc::layer_t layerIndex,
-                 InsertionPoint insert,
-                 DroppedOn droppedOn,
-                 const base::paths& paths);
-
-  // Inserts the image as if it were a document with just one layer and one
-  // frame, at the specified frame and before or after the specified layer index.
-  DropOnTimeline(app::Doc* doc,
-                 doc::frame_t frame,
-                 doc::layer_t layerIndex,
-                 InsertionPoint insert,
-                 DroppedOn droppedOn,
-                 const doc::ImageRef& image);
-
-protected:
-  void onExecute() override;
-  void onUndo() override;
-  void onRedo() override;
-  size_t onMemSize() const override { return sizeof(*this) + m_size; }
-
-private:
-  void setupInsertionLayer(doc::Layer*& layer, doc::LayerGroup*& group);
-  void insertDroppedLayers();
-  bool canMoveCelFrom(app::Doc* srcDoc);
-  void notifyGeneralUpdate();
-  bool hasPendingWork();
-  // Returns the next document to be processed.
-  // Returns false when the user cancelled the process, or true when the
-  // process must go on.
-  bool getNextDoc(std::unique_ptr<Doc>& srcDoc);
-  bool getNextDocFromImage(std::unique_ptr<Doc>& srcDoc);
-  bool getNextDocFromPaths(std::unique_ptr<Doc>& srcDoc);
-
-  void storeDroppedLayerIds(const doc::Layer* layer);
-  void saveDroppedLayers(const doc::LayerList& layers, doc::Sprite* sprite);
-
-  size_t m_size;
-  base::paths m_paths;
-  doc::ImageRef m_image = nullptr;
-  doc::frame_t m_frame;
-  doc::layer_t m_layerIndex;
-  InsertionPoint m_insert;
-  DroppedOn m_droppedOn;
-  // Serialized dropped layers' data. Used for redo operation.
-  std::stringstream m_stream;
-  // Holds the Object IDs of the dropped layers. Used when determining which
-  // layers should be removed in an undo operation.
-  std::vector<doc::ObjectId> m_droppedLayersIds;
-  // Number of frames the doc had before dropping.
-  doc::frame_t m_previousTotalFrames;
-};
-
-}} // namespace app::cmd
-
-#endif

src/app/color_spaces.cpp

@@ -1,5 +1,5 @@
 // Aseprite
-// Copyright (C) 2018-2024  Igara Studio S.A.
+// Copyright (C) 2018-2025  Igara Studio S.A.
 //
 // This program is distributed under the terms of
 // the End-User License Agreement for Aseprite.
@@ -15,6 +15,7 @@
 #include "app/ui/editor/editor.h"
 #include "os/system.h"
 #include "os/window.h"
+#include "ui/display.h"
 
 namespace app {
 
@@ -29,17 +30,15 @@ void initialize_color_spaces(Preferences& pref)
   pref.color.manage.AfterChange.connect([](bool manage) { g_manage = manage; });
 }
 
-os::ColorSpaceRef get_screen_color_space()
+os::ColorSpaceRef get_current_color_space(ui::Display* display, Doc* doc)
 {
-  return os::System::instance()->defaultWindow()->colorSpace();
-}
-
-os::ColorSpaceRef get_current_color_space()
-{
-  if (auto* editor = Editor::activeEditor())
-    return editor->document()->osColorSpace();
-  else
-    return get_screen_color_space();
+  if (!doc) {
+    if (auto* editor = Editor::activeEditor())
+      doc = editor->document();
+  }
+  if (doc)
+    return doc->osColorSpace();
+  return display->colorSpace();
 }
 
 gfx::ColorSpaceRef get_working_rgb_space_from_preferences()
@@ -62,11 +61,11 @@ gfx::ColorSpaceRef get_working_rgb_space_from_preferences()
 //////////////////////////////////////////////////////////////////////
 // Color conversion
 
-ConvertCS::ConvertCS()
+ConvertCS::ConvertCS(ui::Display* display, Doc* doc)
 {
   if (g_manage) {
-    auto srcCS = get_current_color_space();
-    auto dstCS = get_screen_color_space();
+    auto srcCS = get_current_color_space(display, doc);
+    auto dstCS = display->colorSpace();
     if (srcCS && dstCS)
       m_conversion = os::System::instance()->convertBetweenColorSpace(srcCS, dstCS);
   }
@@ -95,9 +94,9 @@ gfx::Color ConvertCS::operator()(const gfx::Color c)
   }
 }
 
-ConvertCS convert_from_current_to_screen_color_space()
+ConvertCS convert_from_current_to_display_color_space(ui::Display* display)
 {
-  return ConvertCS();
+  return ConvertCS(display);
 }
 
 ConvertCS convert_from_custom_to_srgb(const os::ColorSpaceRef& from)

src/app/color_spaces.h

@@ -1,5 +1,5 @@
 // Aseprite
-// Copyright (c) 2018-2020  Igara Studio S.A.
+// Copyright (c) 2018-2025  Igara Studio S.A.
 //
 // This program is distributed under the terms of
 // the End-User License Agreement for Aseprite.
@@ -16,21 +16,25 @@ namespace doc {
 class Sprite;
 }
 
+namespace ui {
+class Display;
+}
+
 namespace app {
+class Doc;
 class Preferences;
 
 void initialize_color_spaces(Preferences& pref);
 
-os::ColorSpaceRef get_screen_color_space();
-
 // Returns the color space of the current document.
-os::ColorSpaceRef get_current_color_space();
+os::ColorSpaceRef get_current_color_space(ui::Display* display, Doc* doc = nullptr);
 
 gfx::ColorSpaceRef get_working_rgb_space_from_preferences();
 
 class ConvertCS {
 public:
-  ConvertCS();
+  ConvertCS() = delete;
+  ConvertCS(ui::Display* display, Doc* doc = nullptr);
   ConvertCS(const os::ColorSpaceRef& srcCS, const os::ColorSpaceRef& dstCS);
   ConvertCS(ConvertCS&&);
   ConvertCS& operator=(const ConvertCS&) = delete;
@@ -40,7 +44,7 @@ private:
   os::Ref<os::ColorSpaceConversion> m_conversion;
 };
 
-ConvertCS convert_from_current_to_screen_color_space();
+ConvertCS convert_from_current_to_display_color_space(ui::Display* display);
 ConvertCS convert_from_custom_to_srgb(const os::ColorSpaceRef& from);
 
 } // namespace app

src/app/commands/apply.cpp

@@ -0,0 +1,46 @@
+// Aseprite
+// Copyright (C) 2025  Igara Studio S.A.
+//
+// This program is distributed under the terms of
+// the End-User License Agreement for Aseprite.
+
+#ifdef HAVE_CONFIG_H
+  #include "config.h"
+#endif
+
+#include "app/commands/command.h"
+#include "app/context.h"
+#include "app/ui/editor/editor.h"
+
+namespace app {
+
+// Depends on the current context/state, used to apply the current
+// transformation (drop pixels).
+class ApplyCommand : public Command {
+public:
+  ApplyCommand();
+
+protected:
+  void onExecute(Context* ctx) override;
+};
+
+ApplyCommand::ApplyCommand() : Command(CommandId::Apply(), CmdUIOnlyFlag)
+{
+}
+
+void ApplyCommand::onExecute(Context* ctx)
+{
+  if (!ctx->isUIAvailable())
+    return;
+
+  auto* editor = Editor::activeEditor();
+  if (editor && editor->isMovingPixels())
+    editor->dropMovingPixels();
+}
+
+Command* CommandFactory::createApplyCommand()
+{
+  return new ApplyCommand;
+}
+
+} // namespace app

src/app/commands/cmd_advanced_mode.cpp

@@ -1,4 +1,5 @@
 // Aseprite
+// Copyright (C) 2025  Igara Studio S.A.
 // Copyright (C) 2001-2018  David Capello
 //
 // This program is distributed under the terms of
@@ -54,11 +55,11 @@ void AdvancedModeCommand::onExecute(Context* context)
 
   if (oldMode == MainWindow::NormalMode && pref.advancedMode.showAlert()) {
     KeyPtr key = KeyboardShortcuts::instance()->command(this->id().c_str());
-    if (!key->accels().empty()) {
+    if (!key->shortcuts().empty()) {
       app::gen::AdvancedMode window;
 
       window.warningLabel()->setTextf("You can go back pressing \"%s\" key.",
-                                      key->accels().front().toString().c_str());
+                                      key->shortcuts().front().toString().c_str());
 
       window.openWindowInForeground();
 

src/app/commands/cmd_cel_properties.cpp

@@ -1,5 +1,5 @@
 // Aseprite
-// Copyright (C) 2020-2023  Igara Studio S.A.
+// Copyright (C) 2020-2025  Igara Studio S.A.
 // Copyright (C) 2001-2018  David Capello
 //
 // This program is distributed under the terms of
@@ -101,12 +101,12 @@ public:
 
     if (countCels() > 0) {
       m_userDataView.configureAndSet((m_cel ? m_cel->data()->userData() : UserData()),
-                                     g_window->propertiesGrid());
+                                     propertiesGrid());
     }
     else if (!m_cel)
       m_userDataView.setVisible(false, false);
 
-    g_window->expandWindow(gfx::Size(g_window->bounds().w, g_window->sizeHint().h));
+    expandWindow(gfx::Size(bounds().w, sizeHint().h));
     updateFromCel();
   }
 
@@ -281,7 +281,7 @@ private:
   {
     if (countCels() > 0) {
       m_userDataView.toggleVisibility();
-      g_window->expandWindow(gfx::Size(g_window->bounds().w, g_window->sizeHint().h));
+      expandWindow(gfx::Size(bounds().w, sizeHint().h));
     }
   }
 

src/app/commands/cmd_duplicate_layer.cpp

@@ -1,5 +1,5 @@
 // Aseprite
-// Copyright (C) 2001-2018  David Capello
+// Copyright (C) 2001-2025  David Capello
 //
 // This program is distributed under the terms of
 // the End-User License Agreement for Aseprite.

src/app/commands/cmd_duplicate_slice.cpp

@@ -0,0 +1,122 @@
+// Aseprite
+// Copyright (C) 2025  Igara Studio S.A.
+//
+// This program is distributed under the terms of
+// the End-User License Agreement for Aseprite.
+
+#ifdef HAVE_CONFIG_H
+  #include "config.h"
+#endif
+
+#include "app/cmd/add_slice.h"
+#include "app/commands/command.h"
+#include "app/context.h"
+#include "app/context_access.h"
+#include "app/context_flags.h"
+#include "app/i18n/strings.h"
+#include "app/site.h"
+#include "app/tx.h"
+#include "app/ui/status_bar.h"
+#include "app/util/slice_utils.h"
+#include "base/convert_to.h"
+#include "doc/object_id.h"
+#include "doc/slice.h"
+
+namespace app {
+
+// Moves the given slice by the dx and dy values
+void offset(Slice* slice, int dx, int dy)
+{
+  for (auto it = slice->begin(); it != slice->end(); ++it) {
+    auto* sk = (*it).value();
+    gfx::Rect bounds = sk->bounds();
+    bounds.offset(gfx::Point{ dx, dy });
+    sk->setBounds(bounds);
+  }
+}
+
+class DuplicateSliceCommand : public Command {
+public:
+  DuplicateSliceCommand();
+
+protected:
+  void onLoadParams(const Params& params) override;
+  bool onEnabled(Context* context) override;
+  void onExecute(Context* context) override;
+
+private:
+  ObjectId m_sliceId;
+};
+
+DuplicateSliceCommand::DuplicateSliceCommand()
+  : Command(CommandId::DuplicateSlice(), CmdRecordableFlag)
+{
+}
+
+void DuplicateSliceCommand::onLoadParams(const Params& params)
+{
+  std::string id = params.get("id");
+  if (!id.empty())
+    m_sliceId = ObjectId(base::convert_to<doc::ObjectId>(id));
+  else
+    m_sliceId = NullId;
+}
+
+bool DuplicateSliceCommand::onEnabled(Context* context)
+{
+  return context->checkFlags(ContextFlags::ActiveDocumentIsWritable |
+                             ContextFlags::HasActiveSprite | ContextFlags::HasActiveLayer);
+}
+
+void DuplicateSliceCommand::onExecute(Context* context)
+{
+  std::vector<Slice*> selectedSlices;
+  {
+    const ContextReader reader(context);
+    if (m_sliceId == NullId) {
+      selectedSlices = get_selected_slices(reader.site());
+      if (selectedSlices.empty())
+        return;
+    }
+    else
+      selectedSlices.push_back(reader.sprite()->slices().getById(m_sliceId));
+  }
+
+  ContextWriter writer(context);
+  Tx tx(writer, "Duplicate Slice");
+  Sprite* sprite = writer.site().sprite();
+
+  Doc* doc = static_cast<Doc*>(sprite->document());
+  doc->notifyBeforeSlicesDuplication();
+  for (auto* s : selectedSlices) {
+    Slice* slice = new Slice(*s);
+    slice->setName(Strings::general_copy_of(slice->name()));
+    // Offset a bit the duplicated slice to avoid overlapping
+    offset(slice, 2, 2);
+
+    tx(new cmd::AddSlice(sprite, slice));
+    doc->notifySliceDuplicated(slice);
+  }
+  tx.commit();
+
+  std::string sliceName;
+  if (selectedSlices.size() == 1)
+    sliceName = selectedSlices[0]->name();
+
+  StatusBar::instance()->invalidate();
+  if (!sliceName.empty()) {
+    StatusBar::instance()->showTip(1000, Strings::duplicate_slice_x_duplicated(sliceName));
+  }
+  else {
+    StatusBar::instance()->showTip(
+      1000,
+      Strings::duplicate_slice_n_slices_duplicated(selectedSlices.size()));
+  }
+}
+
+Command* CommandFactory::createDuplicateSliceCommand()
+{
+  return new DuplicateSliceCommand;
+}
+
+} // namespace app

src/app/commands/cmd_duplicate_sprite.cpp

@@ -65,7 +65,7 @@ void DuplicateSpriteCommand::onExecute(Context* context)
 
   std::string duplicateFn = params().filename.isSet() ?
                               params().filename() :
-                              Strings::general_text_copy_of(base::get_file_title(fn)) +
+                              Strings::general_copy_of(base::get_file_title(fn)) +
                                 (!ext.empty() ? "." + ext : "");
 
   bool flatten = params().flatten.isSet() ? params().flatten() :

src/app/commands/cmd_keyboard_shortcuts.cpp

@@ -1,5 +1,5 @@
 // Aseprite
-// Copyright (C) 2018-2024  Igara Studio S.A.
+// Copyright (C) 2018-2025  Igara Studio S.A.
 // Copyright (C) 2001-2018  David Capello
 //
 // This program is distributed under the terms of
@@ -23,7 +23,7 @@
 #include "app/ui/app_menuitem.h"
 #include "app/ui/keyboard_shortcuts.h"
 #include "app/ui/search_entry.h"
-#include "app/ui/select_accelerator.h"
+#include "app/ui/select_shortcut.h"
 #include "app/ui/separator_in_view.h"
 #include "app/ui/skin/skin_theme.h"
 #include "base/fs.h"
@@ -151,7 +151,7 @@ public:
     , m_keyOrig(key ? new Key(*key) : nullptr)
     , m_menuitem(menuitem)
     , m_level(level)
-    , m_hotAccel(-1)
+    , m_hotShortcut(-1)
     , m_lockButtons(false)
     , m_headerItem(headerItem)
   {
@@ -204,45 +204,45 @@ public:
   }
 
 private:
-  void onChangeAccel(int index)
+  void onChangeShortcut(int index)
   {
     LockButtons lock(this);
-    Accelerator origAccel = m_key->accels()[index];
-    SelectAccelerator window(origAccel, m_key->keycontext(), m_keys);
+    Shortcut origShortcut = m_key->shortcuts()[index];
+    SelectShortcut window(origShortcut, m_key->keycontext(), m_keys);
     window.openWindowInForeground();
 
     if (window.isModified()) {
-      m_key->disableAccel(origAccel, KeySource::UserDefined);
-      if (!window.accel().isEmpty())
-        m_key->add(window.accel(), KeySource::UserDefined, m_keys);
+      m_key->disableShortcut(origShortcut, KeySource::UserDefined);
+      if (!window.shortcut().isEmpty())
+        m_key->add(window.shortcut(), KeySource::UserDefined, m_keys);
     }
 
     this->window()->layout();
   }
 
-  void onDeleteAccel(int index)
+  void onDeleteShortcut(int index)
   {
     LockButtons lock(this);
-    // We need to create a copy of the accelerator because
-    // Key::disableAccel() will modify the accels() collection itself.
-    ui::Accelerator accel = m_key->accels()[index];
+    // We need to create a copy of the shortcut because
+    // Key::disableShortcut() will modify the shortcuts() collection itself.
+    Shortcut shortcut = m_key->shortcuts()[index];
 
-    if (ui::Alert::show(Strings::alerts_delete_shortcut(accel.toString())) != 1)
+    if (ui::Alert::show(Strings::alerts_delete_shortcut(shortcut.toString())) != 1)
       return;
 
-    m_key->disableAccel(accel, KeySource::UserDefined);
+    m_key->disableShortcut(shortcut, KeySource::UserDefined);
     window()->layout();
   }
 
-  void onAddAccel()
+  void onAddShortcut()
   {
     LockButtons lock(this);
-    ui::Accelerator accel;
-    SelectAccelerator window(accel, m_key ? m_key->keycontext() : KeyContext::Any, m_keys);
+    ui::Shortcut shortcut;
+    SelectShortcut window(shortcut, m_key ? m_key->keycontext() : KeyContext::Any, m_keys);
     window.openWindowInForeground();
 
     if ((window.isModified()) ||
-        // We can assign a "None" accelerator to mouse wheel actions
+        // We can assign a "None" shortcut to mouse wheel actions
         (m_key && m_key->type() == KeyType::WheelAction && window.isOK())) {
       if (!m_key) {
         ASSERT(m_menuitem);
@@ -256,7 +256,7 @@ private:
         m_menuKeys[m_menuitem] = m_key;
       }
 
-      m_key->add(window.accel(), KeySource::UserDefined, m_keys);
+      m_key->add(window.shortcut(), KeySource::UserDefined, m_keys);
     }
 
     this->window()->layout();
@@ -269,12 +269,12 @@ private:
 
     if (m_key && m_key->keycontext() != KeyContext::Any) {
       int w = m_headerItem->contextXPos() +
-              font()->textLength(convertKeyContextToUserFriendlyString(m_key->keycontext()));
+              font()->textLength(convert_keycontext_to_user_friendly_string(m_key->keycontext()));
       size.w = std::max(size.w, w);
     }
 
-    if (m_key && !m_key->accels().empty()) {
-      size_t combos = m_key->accels().size();
+    if (m_key && !m_key->shortcuts().empty()) {
+      size_t combos = m_key->shortcuts().size();
       if (combos > 1)
         size.h *= combos;
     }
@@ -315,22 +315,23 @@ private:
       }
     }
 
-    if (m_key && !m_key->accels().empty()) {
+    if (m_key && !m_key->shortcuts().empty()) {
       if (m_key->keycontext() != KeyContext::Any) {
-        g->drawText(convertKeyContextToUserFriendlyString(m_key->keycontext()),
+        g->drawText(convert_keycontext_to_user_friendly_string(m_key->keycontext()),
                     fg,
                     bg,
                     gfx::Point(contextXPos, y));
       }
 
       const int dh = th + 4 * guiscale();
-      IntersectClip clip(g,
-                         gfx::Rect(keyXPos, y, contextXPos - keyXPos, dh * m_key->accels().size()));
+      IntersectClip clip(
+        g,
+        gfx::Rect(keyXPos, y, contextXPos - keyXPos, dh * m_key->shortcuts().size()));
       if (clip) {
         int i = 0;
-        for (const Accelerator& accel : m_key->accels()) {
-          if (i != m_hotAccel || !m_changeButton) {
-            g->drawText(getAccelText(accel), fg, bg, gfx::Point(keyXPos, y));
+        for (const AppShortcut& shortcut : m_key->shortcuts()) {
+          if (i != m_hotShortcut || !m_changeButton) {
+            g->drawText(getShortcutText(shortcut), fg, bg, gfx::Point(keyXPos, y));
           }
           y += dh;
           ++i;
@@ -361,40 +362,41 @@ private:
         gfx::Rect bounds = this->bounds();
         MouseMessage* mouseMsg = static_cast<MouseMessage*>(msg);
 
-        const Accelerators* accels = (m_key ? &m_key->accels() : NULL);
+        const AppShortcuts* shortcuts = (m_key ? &m_key->shortcuts() : nullptr);
         int y = bounds.y;
         int dh = textSize().h + 4 * guiscale();
-        int maxi = (accels && accels->size() > 1 ? accels->size() : 1);
+        int maxi = (shortcuts && shortcuts->size() > 1 ? shortcuts->size() : 1);
 
-        auto theme = SkinTheme::get(this);
+        auto* theme = SkinTheme::get(this);
 
         for (int i = 0; i < maxi; ++i, y += dh) {
-          int w = font()->textLength(
-            (accels && i < (int)accels->size() ? getAccelText((*accels)[i]) : std::string()));
+          int w = font()->textLength((shortcuts && i < (int)shortcuts->size() ?
+                                        getShortcutText((*shortcuts)[i]) :
+                                        std::string()));
           gfx::Rect itemBounds(bounds.x + m_headerItem->keyXPos(), y, w, dh);
           itemBounds = itemBounds.enlarge(
             gfx::Border(4 * guiscale(), 0, 6 * guiscale(), 1 * guiscale()));
 
-          if (accels && i < (int)accels->size() && mouseMsg->position().y >= itemBounds.y &&
+          if (shortcuts && i < (int)shortcuts->size() && mouseMsg->position().y >= itemBounds.y &&
               mouseMsg->position().y < itemBounds.y + itemBounds.h) {
-            if (m_hotAccel != i) {
-              m_hotAccel = i;
+            if (m_hotShortcut != i) {
+              m_hotShortcut = i;
 
               m_changeConn = obs::connection();
               m_changeButton.reset(new Button(""));
-              m_changeConn = m_changeButton->Click.connect([this, i] { onChangeAccel(i); });
+              m_changeConn = m_changeButton->Click.connect([this, i] { onChangeShortcut(i); });
               m_changeButton->setStyle(theme->styles.miniButton());
               addChild(m_changeButton.get());
 
               m_deleteConn = obs::connection();
               m_deleteButton.reset(new Button(""));
-              m_deleteConn = m_deleteButton->Click.connect([this, i] { onDeleteAccel(i); });
+              m_deleteConn = m_deleteButton->Click.connect([this, i] { onDeleteShortcut(i); });
               m_deleteButton->setStyle(theme->styles.miniButton());
               addChild(m_deleteButton.get());
 
               m_changeButton->setBgColor(gfx::ColorNone);
               m_changeButton->setBounds(itemBounds);
-              m_changeButton->setText(getAccelText((*accels)[i]));
+              m_changeButton->setText(getShortcutText((*shortcuts)[i]));
 
               const char* label = "x";
               m_deleteButton->setBgColor(gfx::ColorNone);
@@ -411,7 +413,7 @@ private:
           if (i == 0 && !m_addButton && (!m_menuitem || m_menuitem->getCommand())) {
             m_addConn = obs::connection();
             m_addButton.reset(new Button(""));
-            m_addConn = m_addButton->Click.connect([this] { onAddAccel(); });
+            m_addConn = m_addButton->Click.connect([this] { onAddShortcut(); });
             m_addButton->setStyle(theme->styles.miniButton());
             addChild(m_addButton.get());
 
@@ -452,17 +454,15 @@ private:
         m_addButton->setVisible(false);
     }
 
-    m_hotAccel = -1;
+    m_hotShortcut = -1;
   }
 
-  std::string getAccelText(const Accelerator& accel) const
+  std::string getShortcutText(const AppShortcut& shortcut) const
   {
-    if (m_key && m_key->type() == KeyType::WheelAction && accel.isEmpty()) {
+    if (m_key && m_key->type() == KeyType::WheelAction && shortcut.isEmpty()) {
       return Strings::keyboard_shortcuts_default_action();
     }
-    else {
-      return accel.toString();
-    }
+    return shortcut.toString();
   }
 
   KeyboardShortcuts& m_keys;
@@ -471,14 +471,14 @@ private:
   KeyPtr m_keyOrig;
   AppMenuItem* m_menuitem;
   int m_level;
-  ui::Accelerators m_newAccels;
+  ui::Shortcuts m_newShortcuts;
   std::shared_ptr<ui::Button> m_changeButton;
   std::shared_ptr<ui::Button> m_deleteButton;
   std::shared_ptr<ui::Button> m_addButton;
   obs::scoped_connection m_changeConn;
   obs::scoped_connection m_deleteConn;
   obs::scoped_connection m_addConn;
-  int m_hotAccel;
+  int m_hotShortcut;
   bool m_lockButtons;
   HeaderItem* m_headerItem;
 };
@@ -595,7 +595,7 @@ private:
         case KeyContext::MoveTool:
         case KeyContext::FreehandTool:
         case KeyContext::ShapeTool:
-          text = convertKeyContextToUserFriendlyString(key->keycontext()) + ": " + text;
+          text = convert_keycontext_to_user_friendly_string(key->keycontext()) + ": " + text;
           break;
       }
       KeyItem* keyItem = new KeyItem(m_keys, m_menuKeys, text, key, nullptr, 0, &m_headerItem);

src/app/commands/cmd_layer_properties.cpp

@@ -1,5 +1,5 @@
 // Aseprite
-// Copyright (C) 2020-2024  Igara Studio S.A.
+// Copyright (C) 2020-2025  Igara Studio S.A.
 // Copyright (C) 2001-2018  David Capello
 //
 // This program is distributed under the terms of
@@ -135,8 +135,16 @@ public:
 
     remapWindow();
     centerWindow();
+
+    gfx::Rect originalBounds = bounds();
+
     load_window_pos(this, "LayerProperties");
 
+    // Queue a remap for after the user data view is configured
+    // if the window size has been reset and user data is visible
+    if (originalBounds == bounds() && Preferences::instance().layers.userDataVisibility())
+      m_remapAfterConfigure = true;
+
     UIContext::instance()->add_observer(this);
   }
 
@@ -158,7 +166,12 @@ public:
       m_document->add_observer(this);
 
     if (countLayers() > 0) {
-      m_userDataView.configureAndSet(m_layer->userData(), g_window->propertiesGrid());
+      m_userDataView.configureAndSet(m_layer->userData(), propertiesGrid());
+      if (m_remapAfterConfigure) {
+        remapWindow();
+        centerWindow();
+        m_remapAfterConfigure = false;
+      }
     }
 
     updateFromLayer();
@@ -355,8 +368,7 @@ private:
   {
     if (m_layer) {
       m_userDataView.toggleVisibility();
-      g_window->remapWindow();
-      manager()->invalidate();
+      expandWindow(gfx::Size(bounds().w, sizeHint().h));
     }
   }
 
@@ -484,6 +496,7 @@ private:
   view::RealRange m_range;
   bool m_selfUpdate = false;
   UserDataView m_userDataView;
+  bool m_remapAfterConfigure = false;
 };
 
 LayerPropertiesCommand::LayerPropertiesCommand()

src/app/commands/cmd_new_brush.cpp

@@ -1,5 +1,5 @@
 // Aseprite
-// Copyright (C) 2019-2022  Igara Studio S.A.
+// Copyright (C) 2019-2025  Igara Studio S.A.
 // Copyright (C) 2001-2018  David Capello
 //
 // This program is distributed under the terms of
@@ -164,10 +164,10 @@ void NewBrushCommand::createBrush(const Site& site, const Mask* mask)
   params.set("change", "custom");
   params.set("slot", base::convert_to<std::string>(slot).c_str());
   KeyPtr key = KeyboardShortcuts::instance()->command(CommandId::ChangeBrush(), params);
-  if (key && !key->accels().empty()) {
+  if (key && !key->shortcuts().empty()) {
     std::string tooltip;
     tooltip += Strings::new_brush_shortcut() + " ";
-    tooltip += key->accels().front().toString();
+    tooltip += key->shortcuts().front().toString();
     StatusBar::instance()->showTip(2000, tooltip);
   }
 }

src/app/commands/cmd_new_layer.cpp

@@ -267,16 +267,8 @@ void NewLayerCommand::onExecute(Context* context)
     bool afterBackground = false;
 
     switch (m_type) {
-      case Type::Layer:
-
-        if (m_place == Place::BeforeActiveLayer) {
-          layer = api.newLayer(parent, name);
-          api.restackLayerBefore(layer, parent, activeLayer);
-        }
-        else
-          layer = api.newLayerAfter(parent, name, activeLayer);
-        break;
-      case Type::Group: layer = api.newGroupAfter(parent, name, activeLayer); break;
+      case Type::Layer: layer = api.newLayer(parent, name); break;
+      case Type::Group: layer = api.newGroup(parent, name); break;
       case Type::ReferenceLayer:
         layer = api.newLayer(parent, name);
         if (layer)
@@ -311,6 +303,15 @@ void NewLayerCommand::onExecute(Context* context)
 
     ASSERT(layer->parent());
 
+    // Reorder the resulting layer.
+    switch (m_place) {
+      case Place::AfterActiveLayer:  api.restackLayerAfter(layer, parent, activeLayer); break;
+      case Place::BeforeActiveLayer: api.restackLayerBefore(layer, parent, activeLayer); break;
+      case Place::Top:
+        api.restackLayerAfter(layer, sprite->root(), sprite->root()->lastLayer());
+        break;
+    }
+
     // Put new layer as an overlay of the background or in the first
     // layer in case the sprite is transparent.
     if (afterBackground) {

src/app/commands/cmd_options.cpp

@@ -696,7 +696,6 @@ public:
 
     onChangeBgScope();
     onChangeGridScope();
-    sectionListbox()->selectIndex(m_curSection);
 
     // Aseprite format preferences
     celFormat()->setSelectedItemIndex(int(m_pref.asepriteFormat.celFormat()));
@@ -1046,6 +1045,13 @@ public:
     return true;
   }
 
+protected:
+  void onOpen(Event& evt) override
+  {
+    sectionListbox()->selectIndex(m_curSection);
+    app::gen::Options::onOpen(evt);
+  }
+
 private:
   void onInitTheme(InitThemeEvent& ev) override
   {
@@ -1366,8 +1372,8 @@ private:
     if (!item)
       return;
     const std::string lang = item->langId();
-    const bool state = (lang == "ar" || lang == "ja" || lang == "ko" || lang == "yue_Hant" ||
-                        lang == "zh_Hans" || lang == "zh_Hant");
+    const bool state = (lang == "ar" || lang == "ja" || lang == "ko" || lang == "th" ||
+                        lang == "yue_Hant" || lang == "zh_Hans" || lang == "zh_Hant");
     fontWarningFiller()->setVisible(state);
     fontWarning()->setVisible(state);
     layout();

src/app/commands/cmd_paste_text.cpp

@@ -1,5 +1,5 @@
 // Aseprite
-// Copyright (C) 2019-2024  Igara Studio S.A.
+// Copyright (C) 2019-2025  Igara Studio S.A.
 // Copyright (C) 2001-2018  David Capello
 //
 // This program is distributed under the terms of
@@ -10,6 +10,7 @@
 #endif
 
 #include "app/app.h"
+#include "app/color_utils.h"
 #include "app/commands/command.h"
 #include "app/console.h"
 #include "app/context.h"
@@ -88,10 +89,10 @@ void PasteTextCommand::onExecute(Context* ctx)
     std::string text = window.userText()->text();
     app::Color color = window.fontColor()->getColor();
 
-    doc::ImageRef image = render_text(
-      fontInfo,
-      text,
-      gfx::rgba(color.getRed(), color.getGreen(), color.getBlue(), color.getAlpha()));
+    ui::Paint paint = window.fontFace()->paint();
+    paint.color(color_utils::color_for_ui(color));
+
+    doc::ImageRef image = render_text(fontInfo, text, paint);
     if (image) {
       Sprite* sprite = editor->sprite();
       if (image->pixelFormat() != sprite->pixelFormat()) {

src/app/commands/cmd_sprite_properties.cpp

@@ -1,5 +1,5 @@
 // Aseprite
-// Copyright (C) 2018-2024  Igara Studio S.A.
+// Copyright (C) 2018-2025  Igara Studio S.A.
 // Copyright (C) 2001-2018  David Capello
 //
 // This program is distributed under the terms of
@@ -188,8 +188,7 @@ private:
   void onToggleUserData()
   {
     m_userDataView.toggleVisibility();
-    remapWindow();
-    manager()->invalidate();
+    expandWindow(gfx::Size(bounds().w, sizeHint().h));
   }
 
   void onTilesedDuplicated(const Tileset* tilesetClone)

src/app/commands/cmd_undo_history.cpp

@@ -21,6 +21,7 @@
 #include "app/doc_undo.h"
 #include "app/doc_undo_observer.h"
 #include "app/docs_observer.h"
+#include "app/i18n/strings.h"
 #include "app/modules/gui.h"
 #include "app/modules/palettes.h"
 #include "app/site.h"
@@ -292,7 +293,7 @@ public:
                    base::get_pretty_memory_size(static_cast<Cmd*>(state->cmd())->memSize())
 #endif
                  :
-                 std::string("Initial State"));
+                 Strings::undo_history_initial_state());
 
       if ((g->getClipBounds() & itemBounds).isEmpty())
         return;

src/app/commands/commands_list.h

@@ -1,5 +1,5 @@
 // Aseprite
-// Copyright (C) 2018-2023  Igara Studio S.A.
+// Copyright (C) 2018-2025  Igara Studio S.A.
 // Copyright (C) 2001-2018  David Capello
 //
 // This program is distributed under the terms of
@@ -8,6 +8,7 @@
 FOR_EACH_COMMAND(About)
 FOR_EACH_COMMAND(AddColor)
 FOR_EACH_COMMAND(AdvancedMode)
+FOR_EACH_COMMAND(Apply)
 FOR_EACH_COMMAND(AutocropSprite)
 FOR_EACH_COMMAND(BackgroundFromLayer)
 FOR_EACH_COMMAND(BrightnessContrast)
@@ -40,6 +41,7 @@ FOR_EACH_COMMAND(DeselectMask)
 FOR_EACH_COMMAND(Despeckle)
 FOR_EACH_COMMAND(DiscardBrush)
 FOR_EACH_COMMAND(DuplicateLayer)
+FOR_EACH_COMMAND(DuplicateSlice)
 FOR_EACH_COMMAND(DuplicateSprite)
 FOR_EACH_COMMAND(DuplicateView)
 FOR_EACH_COMMAND(Exit)

src/app/commands/filters/cmd_replace_color.cpp

@@ -1,5 +1,5 @@
 // Aseprite
-// Copyright (C) 2019-2022  Igara Studio S.A.
+// Copyright (C) 2019-2025  Igara Studio S.A.
 // Copyright (C) 2001-2018  David Capello
 //
 // This program is distributed under the terms of
@@ -128,7 +128,7 @@ private:
       case ui::kKeyDownMessage: {
         KeyboardShortcuts* keys = KeyboardShortcuts::instance();
         const KeyPtr key = keys->command(CommandId::SwitchColors());
-        if (key && key->isPressed(msg, *keys)) {
+        if (key && key->isPressed(msg)) {
           // Switch colors
           app::Color from = m_fromButton->getColor();
           app::Color to = m_toButton->getColor();

src/app/console.cpp

@@ -1,5 +1,5 @@
 // Aseprite
-// Copyright (C) 2018-2024  Igara Studio S.A.
+// Copyright (C) 2018-2025  Igara Studio S.A.
 // Copyright (C) 2001-2018  David Capello
 //
 // This program is distributed under the terms of
@@ -48,9 +48,12 @@ public:
 
     // When the main window is closed, we should close the console (in
     // other case the main message loop will continue running for the
-    // console too).
-    m_mainWindowClosedConn = App::instance()->mainWindow()->Close.connect(
-      [this] { closeWindow(nullptr); });
+    // console too). The main window can be nullptr if the console is
+    // used to show an error when loading the default theme or font at
+    // the initialization.
+    if (auto* mainWin = App::instance()->mainWindow()) {
+      m_mainWindowClosedConn = mainWin->Close.connect([this] { closeWindow(nullptr); });
+    }
 
     // When the window is closed, we clear the text
     Close.connect([this] {
@@ -78,7 +81,7 @@ public:
 
   ~ConsoleWindow() { TRACE_CON("CON: ~ConsoleWindow this=", this); }
 
-  void addMessage(const std::string& msg)
+  void addMessage(std::string msg)
   {
     if (!m_hasText) {
       m_hasText = true;
@@ -90,6 +93,17 @@ public:
     gfx::Point pt = m_view.viewScroll();
     const bool autoScroll = (pt.y >= maxSize.h - visible.h);
 
+    // Escape characters we can't show properly
+    for (size_t i = 0; i < msg.size(); i++) {
+      switch (msg[i]) {
+        case '\a':
+        case '\b':
+        case '\r':
+        case '\t':
+        case '\v': msg[i] = ' ';
+      }
+    }
+
     m_textbox.setText(m_textbox.text() + msg);
 
     if (autoScroll) {

src/app/crash/data_recovery.cpp

@@ -1,5 +1,5 @@
 // Aseprite
-// Copyright (C) 2019-2023  Igara Studio S.A.
+// Copyright (C) 2019-2025  Igara Studio S.A.
 // Copyright (C) 2001-2018  David Capello
 //
 // This program is distributed under the terms of
@@ -139,6 +139,13 @@ DataRecovery::Sessions DataRecovery::sessions()
   return copy;
 }
 
+bool DataRecovery::isRunningSession(const SessionPtr& session) const
+{
+  ASSERT(session);
+  ASSERT(m_inProgress);
+  return session->path() == m_inProgress->path();
+}
+
 void DataRecovery::searchForSessions()
 {
   Sessions sessions;
@@ -150,7 +157,7 @@ void DataRecovery::searchForSessions()
     RECO_TRACE("RECO: Session '%s' ", itempath.c_str());
 
     SessionPtr session(new Session(&m_config, itempath));
-    if (!session->isRunning()) {
+    if (!isRunningSession(session)) {
       if ((session->isEmpty()) || (!session->isCrashedSession() && session->isOldSession())) {
         RECO_TRACE("to be deleted (%s)\n",
                    session->isEmpty() ? "is empty" :

src/app/crash/data_recovery.h

@@ -1,5 +1,5 @@
 // Aseprite
-// Copyright (C) 2019-2021  Igara Studio S.A.
+// Copyright (C) 2019-2025  Igara Studio S.A.
 // Copyright (C) 2001-2018  David Capello
 //
 // This program is distributed under the terms of
@@ -45,6 +45,8 @@ public:
   // Returns a copy of the list of sessions that can be recovered.
   Sessions sessions();
 
+  bool isRunningSession(const SessionPtr& session) const;
+
   // Triggered in the UI-thread from the m_thread using an
   // ui::execute_from_ui_thread() when the list of sessions is ready
   // to be used.

src/app/crash/session.cpp

@@ -1,5 +1,5 @@
 // Aseprite
-// Copyright (C) 2019-2024  Igara Studio S.A.
+// Copyright (C) 2019-2025  Igara Studio S.A.
 // Copyright (C) 2001-2018  David Capello
 //
 // This program is distributed under the terms of
@@ -19,12 +19,10 @@
 #include "app/crash/write_document.h"
 #include "app/doc.h"
 #include "app/doc_access.h"
-#include "app/file/file.h"
 #include "app/ui_context.h"
 #include "base/convert_to.h"
 #include "base/fs.h"
 #include "base/fstream_path.h"
-#include "base/process.h"
 #include "base/split_string.h"
 #include "base/string.h"
 #include "base/thread.h"
@@ -128,12 +126,6 @@ const Session::Backups& Session::backups()
   return m_backups;
 }
 
-bool Session::isRunning()
-{
-  loadPid();
-  return base::get_process_name(m_pid) == base::get_process_name(base::get_current_process_id());
-}
-
 bool Session::isCrashedSession()
 {
   loadPid();

src/app/crash/session.h

@@ -1,5 +1,5 @@
 // Aseprite
-// Copyright (C) 2019-2022  Igara Studio S.A.
+// Copyright (C) 2019-2025  Igara Studio S.A.
 // Copyright (C) 2001-2018  David Capello
 //
 // This program is distributed under the terms of
@@ -47,9 +47,9 @@ public:
 
   std::string name() const;
   std::string version();
+  std::string& path() { return m_path; }
   const Backups& backups();
 
-  bool isRunning();
   bool isCrashedSession();
   bool isOldSession();
   bool isEmpty();

src/app/doc.cpp

@@ -1,5 +1,5 @@
 // Aseprite
-// Copyright (C) 2018-2024  Igara Studio S.A.
+// Copyright (C) 2018-2025  Igara Studio S.A.
 // Copyright (C) 2001-2018  David Capello
 //
 // This program is distributed under the terms of
@@ -338,6 +338,19 @@ void Doc::notifyAfterAddTile(LayerTilemap* layer, frame_t frame, tile_index ti)
   notify_observers<DocEvent&>(&DocObserver::onAfterAddTile, ev);
 }
 
+void Doc::notifyBeforeSlicesDuplication()
+{
+  DocEvent ev(this);
+  notify_observers<DocEvent&>(&DocObserver::onBeforeSlicesDuplication, ev);
+}
+
+void Doc::notifySliceDuplicated(Slice* slice)
+{
+  DocEvent ev(this);
+  ev.slice(slice);
+  notify_observers<DocEvent&>(&DocObserver::onSliceDuplicated, ev);
+}
+
 bool Doc::isModified() const
 {
   return !m_undo->isInSavedStateOrSimilar();

src/app/doc.h

@@ -1,5 +1,5 @@
 // Aseprite
-// Copyright (C) 2018-2024  Igara Studio S.A.
+// Copyright (C) 2018-2025  Igara Studio S.A.
 // Copyright (C) 2001-2018  David Capello
 //
 // This program is distributed under the terms of
@@ -141,6 +141,8 @@ public:
   void notifyTilesetChanged(Tileset* tileset);
   void notifyLayerGroupCollapseChange(Layer* layer);
   void notifyAfterAddTile(LayerTilemap* layer, frame_t frame, tile_index ti);
+  void notifyBeforeSlicesDuplication();
+  void notifySliceDuplicated(Slice* slice);
 
   //////////////////////////////////////////////////////////////////////
   // File related properties

src/app/doc_api.cpp

@@ -14,6 +14,7 @@
 #include "app/cmd/add_cel.h"
 #include "app/cmd/add_frame.h"
 #include "app/cmd/add_layer.h"
+#include "app/cmd/add_tileset.h"
 #include "app/cmd/clear_cel.h"
 #include "app/cmd/clear_image.h"
 #include "app/cmd/copy_cel.h"
@@ -693,12 +694,44 @@ void DocApi::restackLayerBefore(Layer* layer, LayerGroup* parent, Layer* beforeT
   restackLayerAfter(layer, parent, afterThis);
 }
 
+Layer* DocApi::copyLayerWithSprite(doc::Layer* layer, doc::Sprite* sprite)
+{
+  std::unique_ptr<doc::Layer> clone;
+  if (layer->isTilemap()) {
+    auto* srcTilemap = static_cast<LayerTilemap*>(layer);
+    tileset_index tilesetIndex = srcTilemap->tilesetIndex();
+    // If the caller is trying to make a copy of a tilemap layer specifying a
+    // different sprite as its owner, then we must copy the tilesets of the
+    // given tilemap layer into the new owner.
+    if (sprite != srcTilemap->sprite()) {
+      auto* srcTilesetCopy = Tileset::MakeCopyCopyingImagesForSprite(srcTilemap->tileset(), sprite);
+      auto* addTileset = new cmd::AddTileset(sprite, srcTilesetCopy);
+      m_transaction.execute(addTileset);
+      tilesetIndex = addTileset->tilesetIndex();
+    }
+
+    clone = std::make_unique<LayerTilemap>(sprite, tilesetIndex);
+  }
+  else if (layer->isImage())
+    clone = std::make_unique<LayerImage>(sprite);
+  else if (layer->isGroup())
+    clone = std::make_unique<LayerGroup>(sprite);
+  else
+    throw std::runtime_error("Invalid layer type");
+
+  if (auto* doc = dynamic_cast<app::Doc*>(sprite->document())) {
+    doc->copyLayerContent(layer, doc, clone.get());
+  }
+
+  return clone.release();
+}
+
 Layer* DocApi::duplicateLayerAfter(Layer* sourceLayer, LayerGroup* parent, Layer* afterLayer)
 {
   ASSERT(parent);
-  Layer* newLayerPtr = copy_layer(sourceLayer);
+  Layer* newLayerPtr = copyLayerWithSprite(sourceLayer, parent->sprite());
 
-  newLayerPtr->setName(Strings::general_text_copy_of(newLayerPtr->name()));
+  newLayerPtr->setName(Strings::general_copy_of(newLayerPtr->name()));
 
   addLayer(parent, newLayerPtr, afterLayer);
 

src/app/doc_api.h

@@ -9,6 +9,7 @@
 #define APP_DOC_API_H_INCLUDED
 #pragma once
 
+#include "app/doc_api_dnd_helper.h"
 #include "app/drop_frame_place.h"
 #include "app/tags_handling.h"
 #include "doc/algorithm/flip_type.h"
@@ -38,6 +39,7 @@ class Doc;
 class Transaction;
 
 using namespace doc;
+using namespace docapi;
 
 // High-level API to modify a document adding undo information, i.e.
 // adding new "Cmd"s in the given transaction.
@@ -134,6 +136,14 @@ public:
   // Palette API
   void setPalette(Sprite* sprite, frame_t frame, const Palette* newPalette);
 
+  // Drag and Drop helper API
+  void dropDocumentsOnTimeline(app::Doc* doc,
+                               doc::frame_t frame,
+                               doc::layer_t layerIndex,
+                               InsertionPoint insert,
+                               DroppedOn droppedOn,
+                               DocProvider& provider);
+
 private:
   void cropImageLayer(LayerImage* layer, const gfx::Rect& bounds, const bool trimOutside);
   bool cropCel(LayerImage* layer, Cel* cel, const gfx::Rect& bounds, const bool trimOutside);
@@ -145,6 +155,8 @@ private:
                   const DropFramePlace dropFramePlace,
                   const TagsHandling tagsHandling);
 
+  Layer* copyLayerWithSprite(doc::Layer* layer, doc::Sprite* sprite);
+
   class HandleLinkedCels {
   public:
     HandleLinkedCels(DocApi& api,

src/app/doc_api_dnd_helper.cpp

@@ -0,0 +1,142 @@
+// Aseprite
+// Copyright (C) 2025  Igara Studio S.A.
+//
+// This program is distributed under the terms of
+// the End-User License Agreement for Aseprite.
+
+#ifdef HAVE_CONFIG_H
+  #include "config.h"
+#endif
+
+#include "app/doc_api.h"
+
+#include "app/cmd/copy_cel.h"
+#include "app/cmd/set_pixel_format.h"
+#include "app/cmd/set_total_frames.h"
+#include "app/file/file.h"
+#include "app/transaction.h"
+#include "doc/layer.h"
+#include "render/dithering.h"
+
+namespace {
+
+using namespace app;
+
+// Returns true if the document srcDoc has a cel that can be copied into a
+// destDoc's cel.
+// The cel from srcDoc can be copied only when all of the following conditions
+// are met:
+// * Drop took place in a cel.
+// * Source doc has only one layer with just one frame.
+// * The layer from the source doc and the destination cel's layer are both
+// Image layers.
+// Otherwise this function returns false.
+bool can_copy_cel(Doc* srcDoc, Doc* destDoc, DroppedOn droppedOn, doc::layer_t layerIndex)
+{
+  auto* srcLayer = srcDoc->sprite()->firstLayer();
+  auto* destLayer = destDoc->sprite()->allLayers()[layerIndex];
+  return droppedOn == DroppedOn::Cel && srcDoc->sprite()->allLayersCount() == 1 &&
+         srcDoc->sprite()->totalFrames() == 1 && srcLayer->isImage() && destLayer->isImage();
+}
+
+void setup_insertion_layer(Doc* destDoc,
+                           doc::layer_t layerIndex,
+                           InsertionPoint& insert,
+                           Layer*& layer,
+                           LayerGroup*& group)
+{
+  const LayerList& allLayers = destDoc->sprite()->allLayers();
+  layer = allLayers[layerIndex];
+  if (insert == InsertionPoint::BeforeLayer && layer->isGroup()) {
+    group = static_cast<LayerGroup*>(layer);
+    // The user is trying to drop layers into an empty group, so there is no after
+    // nor before layer...
+    if (group->layersCount() == 0) {
+      layer = nullptr;
+      return;
+    }
+    layer = group->lastLayer();
+    insert = InsertionPoint::AfterLayer;
+  }
+
+  group = layer->parent();
+}
+
+} // namespace
+
+namespace app {
+
+using namespace docapi;
+
+void DocApi::dropDocumentsOnTimeline(app::Doc* destDoc,
+                                     doc::frame_t frame,
+                                     doc::layer_t layerIndex,
+                                     InsertionPoint insert,
+                                     DroppedOn droppedOn,
+                                     DocProvider& docProvider)
+{
+  // Layer used as a reference to determine if the dropped layers will be
+  // inserted after or before it.
+  Layer* refLayer = nullptr;
+  // Parent group of the reference layer layer.
+  LayerGroup* group = nullptr;
+  // Keep track of the current insertion point.
+  setup_insertion_layer(destDoc, layerIndex, insert, refLayer, group);
+
+  int docsProcessed = 0;
+  while (docProvider.pendingDocs() > 0) {
+    std::unique_ptr<Doc> srcDoc = docProvider.nextDoc();
+    docsProcessed++;
+
+    // If the provider returned a null document then there was some problem with
+    // that specific doc but it can continue providing more documents
+    if (!srcDoc)
+      continue;
+
+    // If source document doesn't match the destination document's color
+    // mode, change it.
+    if (srcDoc->colorMode() != destDoc->colorMode()) {
+      // We can change the source doc pixel format out of any transaction because
+      // we don't need undo/redo it.
+      cmd::SetPixelFormat cmd(srcDoc->sprite(),
+                              destDoc->sprite()->pixelFormat(),
+                              render::Dithering(),
+                              Preferences::instance().quantization.rgbmapAlgorithm(),
+                              nullptr,
+                              nullptr,
+                              FitCriteria::DEFAULT);
+      cmd.execute(destDoc->context());
+    }
+
+    // If there is only one source document to process and it has a single cel
+    // that can be copied, then copy the cel from the source doc into the
+    // destination doc's selected frame.
+    const bool isJustOneDoc = (docsProcessed == 1 && docProvider.pendingDocs() == 0);
+    if (isJustOneDoc && can_copy_cel(srcDoc.get(), destDoc, droppedOn, layerIndex)) {
+      auto* srcLayer = static_cast<LayerImage*>(srcDoc->sprite()->firstLayer());
+      auto* destLayer = static_cast<LayerImage*>(destDoc->sprite()->allLayers()[layerIndex]);
+      m_transaction.execute(new cmd::CopyCel(srcLayer, 0, destLayer, frame, false));
+      break;
+    }
+
+    // If there is no room for the source frames, add frames to the
+    // destination sprite.
+    if (frame + srcDoc->sprite()->totalFrames() > destDoc->sprite()->totalFrames()) {
+      m_transaction.execute(
+        new cmd::SetTotalFrames(destDoc->sprite(), frame + srcDoc->sprite()->totalFrames()));
+    }
+
+    for (auto* srcLayer : srcDoc->sprite()->root()->layers()) {
+      srcLayer->displaceFrames(0, frame);
+      if (insert == InsertionPoint::AfterLayer) {
+        refLayer = duplicateLayerAfter(srcLayer, group, refLayer);
+      }
+      else {
+        refLayer = duplicateLayerBefore(srcLayer, group, refLayer);
+        insert = InsertionPoint::AfterLayer;
+      }
+    }
+  }
+}
+
+} // namespace app

src/app/doc_api_dnd_helper.h

@@ -0,0 +1,41 @@
+// Aseprite
+// Copyright (C) 2025  Igara Studio S.A.
+//
+// This program is distributed under the terms of
+// the End-User License Agreement for Aseprite.
+
+#ifndef APP_DOC_API_DND_HELPER_H_INCLUDED
+#define APP_DOC_API_DND_HELPER_H_INCLUDED
+#pragma once
+
+#include "app/doc.h"
+
+namespace app { namespace docapi {
+
+enum class InsertionPoint {
+  BeforeLayer,
+  AfterLayer,
+};
+
+enum class DroppedOn {
+  Unspecified,
+  Frame,
+  Layer,
+  Cel,
+};
+
+// Used by the drag & drop helper API as a provider of the documents that
+// were dragged and then dropped in some Drag&Drop aware widget.
+class DocProvider {
+public:
+  virtual ~DocProvider() = default;
+  // Returns the next document from the underlying provider's implementation,
+  // returns null if there is no more documents to provide.
+  virtual std::unique_ptr<Doc> nextDoc() = 0;
+  // Returns the number of docs that were not provided yet.
+  virtual int pendingDocs() = 0;
+};
+
+}} // namespace app::docapi
+
+#endif

src/app/doc_exporter.cpp

@@ -1,5 +1,5 @@
 // Aseprite
-// Copyright (C) 2018-2024  Igara Studio S.A.
+// Copyright (C) 2018-2025  Igara Studio S.A.
 // Copyright (C) 2001-2018  David Capello
 //
 // This program is distributed under the terms of
@@ -43,6 +43,7 @@
 #include "gfx/size.h"
 #include "render/dithering.h"
 #include "render/ordered_dither.h"
+#include "render/quantization.h"
 #include "render/render.h"
 #include "ver/info.h"
 
@@ -69,6 +70,104 @@ std::string escape_for_json(const std::string& path)
   return res;
 }
 
+// Forward declaration
+void serialize_properties(const doc::UserData::Properties& props, std::ostream& os);
+
+// Helper for a single value
+void serialize_variant(const doc::UserData::Variant& value, std::ostream& os)
+{
+  using Properties = doc::UserData::Properties;
+  switch (value.index()) {
+    case USER_DATA_PROPERTY_TYPE_BOOL: os << (get_value<bool>(value) ? "true" : "false"); break;
+    case USER_DATA_PROPERTY_TYPE_INT8: os << static_cast<int64_t>(get_value<int8_t>(value)); break;
+    case USER_DATA_PROPERTY_TYPE_UINT8:
+      os << static_cast<int64_t>(get_value<uint8_t>(value));
+      break;
+    case USER_DATA_PROPERTY_TYPE_INT16:
+      os << static_cast<int64_t>(get_value<int16_t>(value));
+      break;
+    case USER_DATA_PROPERTY_TYPE_UINT16:
+      os << static_cast<int64_t>(get_value<uint16_t>(value));
+      break;
+    case USER_DATA_PROPERTY_TYPE_INT32:
+      os << static_cast<int64_t>(get_value<int32_t>(value));
+      break;
+    case USER_DATA_PROPERTY_TYPE_UINT32:
+      os << static_cast<int64_t>(get_value<uint32_t>(value));
+      break;
+    case USER_DATA_PROPERTY_TYPE_INT64:
+      os << static_cast<int64_t>(get_value<int64_t>(value));
+      break;
+    case USER_DATA_PROPERTY_TYPE_UINT64:
+      os << static_cast<int64_t>(get_value<uint64_t>(value));
+      break;
+    case USER_DATA_PROPERTY_TYPE_FLOAT:  os << get_value<float>(value); break;
+    case USER_DATA_PROPERTY_TYPE_DOUBLE: os << get_value<double>(value); break;
+    case USER_DATA_PROPERTY_TYPE_STRING:
+      os << "\"" << escape_for_json(get_value<std::string>(value)) << "\"";
+      break;
+    case USER_DATA_PROPERTY_TYPE_PROPERTIES:
+      serialize_properties(get_value<Properties>(value), os);
+      break;
+    default: os << "\"[unsupported type]\""; break;
+  }
+}
+
+// Serializes a map of properties
+void serialize_properties(const doc::UserData::Properties& props, std::ostream& os)
+{
+  os << "{";
+  bool first = true;
+  for (const auto& [key, value] : props) {
+    if (!first)
+      os << ", ";
+    first = false;
+    os << "\"" << escape_for_json(key) << "\": ";
+    serialize_variant(value, os);
+  }
+  os << "}";
+}
+
+void serialize_userdata_properties(const doc::UserData& data, std::ostream& os)
+{
+  const auto& propsMaps = data.propertiesMaps();
+  bool hasAnyProps = false;
+  for (const auto& [group, props] : propsMaps) {
+    if (!props.empty()) {
+      hasAnyProps = true;
+      break;
+    }
+  }
+  if (hasAnyProps) {
+    os << ", \"properties\": {";
+    bool firstProp = true;
+    for (const auto& [group, props] : propsMaps) {
+      if (!props.empty()) {
+        if (!firstProp)
+          os << ", ";
+        firstProp = false;
+        if (group.empty()) {
+          // Default group: flatten its keys at the top level
+          bool firstKey = true;
+          for (const auto& [key, value] : props) {
+            if (!firstKey)
+              os << ", ";
+            firstKey = false;
+            os << "\"" << escape_for_json(key) << "\": ";
+            serialize_variant(value, os);
+          }
+        }
+        else {
+          // Named group: nest under its group name
+          os << "\"" << escape_for_json(group) << "\": ";
+          serialize_properties(props, os);
+        }
+      }
+    }
+    os << "}";
+  }
+}
+
 std::ostream& operator<<(std::ostream& os, const doc::UserData& data)
 {
   doc::color_t color = data.color();
@@ -80,6 +179,9 @@ std::ostream& operator<<(std::ostream& os, const doc::UserData& data)
   }
   if (!data.text().empty())
     os << ", \"data\": \"" << escape_for_json(data.text()) << "\"";
+
+  serialize_userdata_properties(data, os);
+
   return os;
 }
 
@@ -300,6 +402,35 @@ public:
     }
   }
 
+  void setPixelFormat(const doc::PixelFormat newPixelFormat)
+  {
+    if (!m_image || m_image->pixelFormat() == newPixelFormat)
+      return;
+
+    ImageSpec spec(ColorMode(newPixelFormat),
+                   m_image->width(),
+                   m_image->height(),
+                   m_image->maskColor());
+    ImageRef convertedImg(Image::create(spec));
+    if (!convertedImg)
+      return;
+
+    clear_image(convertedImg.get(), 0);
+    render::Dithering dithering;
+    Sprite* sprite = this->sprite();
+    render::convert_pixel_format(m_image.get(),
+                                 convertedImg.get(),
+                                 newPixelFormat,
+                                 dithering,
+                                 sprite ? sprite->rgbMap(0) : nullptr,
+                                 sprite ? sprite->palette(0) : nullptr,
+                                 (sprite && sprite->backgroundLayer()),
+                                 0,
+                                 0,
+                                 nullptr);
+    m_image = convertedImg;
+  }
+
 private:
   Doc* m_document;
   Sprite* m_sprite;
@@ -679,6 +810,9 @@ Doc* DocExporter::exportSheet(Context* ctx, base::task_token& token)
   Sprite* texture = textureDocument->sprite();
   Image* textureImage = texture->root()->firstLayer()->cel(frame_t(0))->image();
 
+  for (auto& sample : samples)
+    sample.setPixelFormat(texture->pixelFormat());
+
   renderTexture(ctx, samples, textureImage, token);
   if (token.canceled())
     return nullptr;
@@ -1245,22 +1379,6 @@ void DocExporter::renderTexture(Context* ctx,
       ++i;
       continue;
     }
-
-    // Make the sprite compatible with the texture so the render()
-    // works correctly.
-    if (sample.sprite()->pixelFormat() != textureImage->pixelFormat()) {
-      RgbMapAlgorithm rgbmapAlgo = Preferences::instance().quantization.rgbmapAlgorithm();
-      FitCriteria fc = Preferences::instance().quantization.fitCriteria();
-      cmd::SetPixelFormat(sample.sprite(),
-                          textureImage->pixelFormat(),
-                          render::Dithering(),
-                          rgbmapAlgo,
-                          nullptr, // toGray is not needed because the texture is Indexed or RGB
-                          nullptr, // TODO add a delegate to show progress
-                          fc)
-        .execute(ctx);
-    }
-
     sample.renderSample(textureImage,
                         sample.inTextureBounds().x + m_innerPadding,
                         sample.inTextureBounds().y + m_innerPadding,

src/app/doc_observer.h

@@ -1,5 +1,5 @@
 // Aseprite
-// Copyright (C) 2018-2024  Igara Studio S.A.
+// Copyright (C) 2018-2025  Igara Studio S.A.
 // Copyright (C) 2001-2018  David Capello
 //
 // This program is distributed under the terms of
@@ -90,6 +90,8 @@ public:
 
   // Slices
   virtual void onSliceNameChange(DocEvent& ev) {}
+  virtual void onBeforeSlicesDuplication(DocEvent& ev) {}
+  virtual void onSliceDuplicated(DocEvent& ev) {}
 
   // The tileset has changed.
   virtual void onTilesetChanged(DocEvent& ev) {}

src/app/doc_range_ops.cpp

@@ -1,5 +1,5 @@
 // Aseprite
-// Copyright (C) 2019-2020  Igara Studio S.A.
+// Copyright (C) 2019-2025  Igara Studio S.A.
 // Copyright (C) 2001-2018  David Capello
 //
 // This program is distributed under the terms of

src/app/extensions.cpp

@@ -1,5 +1,5 @@
 // Aseprite
-// Copyright (C) 2020-2024  Igara Studio S.A.
+// Copyright (C) 2020-2025  Igara Studio S.A.
 // Copyright (C) 2017-2018  David Capello
 //
 // This program is distributed under the terms of
@@ -42,6 +42,7 @@
 #include "archive_entry.h"
 #include "json11.hpp"
 
+#include <cctype>
 #include <fstream>
 #include <queue>
 #include <sstream>
@@ -535,6 +536,19 @@ void Extension::updateCategory(const Category newCategory)
 
 #ifdef ENABLE_SCRIPTING
 
+static bool is_simple_id(const char* k)
+{
+  if (!*k)
+    return false;
+  if (!std::isalpha(*k) && *k != '_')
+    return false;
+  for (const char* p = k + 1; *p; ++p) {
+    if (!std::isalnum(*p) && *p != '_')
+      return false;
+  }
+  return true;
+}
+
 // TODO move this to app/script/tableutils.h
 static void serialize_table(lua_State* L, int idx, std::string& result)
 {
@@ -555,7 +569,21 @@ static void serialize_table(lua_State* L, int idx, std::string& result)
     // Save key
     if (lua_type(L, -2) == LUA_TSTRING) {
       if (const char* k = lua_tostring(L, -2)) {
-        result += k;
+        // If this is a simple identifier we can avoid using ["..."] to enclose
+        // the key name.
+        if (is_simple_id(k)) {
+          result += k;
+        }
+        // In other cases, we enclose the key name in brackets and
+        // double quotes ["..."]  to avoid syntax errors when the name
+        // has unicode characters.
+        else {
+          result.push_back('[');
+          result.push_back('"');
+          result += k;
+          result.push_back('"');
+          result.push_back(']');
+        }
         result.push_back('=');
       }
     }

src/app/file/gif_format.cpp

@@ -1,5 +1,5 @@
 // Aseprite
-// Copyright (C) 2018-2023  Igara Studio S.A.
+// Copyright (C) 2018-2025  Igara Studio S.A.
 // Copyright (C) 2001-2018  David Capello
 //
 // This program is distributed under the terms of
@@ -1095,6 +1095,9 @@ public:
     gifframe_t nframes = totalFrames();
     for (gifframe_t gifFrame = 0; gifFrame < nframes; ++gifFrame) {
       ASSERT(frame_it != frame_end);
+      if (m_fop->isStop())
+        break;
+
       frame_t frame = *frame_it;
       ++frame_it;
 
@@ -1401,7 +1404,7 @@ private:
           color_t color = *srcIt;
           int i;
 
-          if (rgba_geta(color) >= 128) {
+          if (rgba_geta(color) > 0) {
             i = framePalette.findExactMatch(rgba_getr(color),
                                             rgba_getg(color),
                                             rgba_getb(color),

src/app/file/svg_format.cpp

@@ -75,20 +75,86 @@ bool SvgFormat::onSave(FileOp* fop)
   const int pixelScaleValue = std::clamp(svg_options->pixelScale, 0, 10000);
   FileHandle handle(open_file_with_exception_sync_on_close(fop->filename(), "wb"));
   FILE* f = handle.get();
-  auto printcol = [f](int x, int y, int r, int g, int b, int a, int pxScale) {
-    fprintf(f,
-            "<rect x=\"%d\" y=\"%d\" width=\"%d\" height=\"%d\" fill=\"#%02X%02X%02X\" ",
-            x * pxScale,
-            y * pxScale,
-            pxScale,
-            pxScale,
-            r,
-            g,
-            b);
-    if (a != 255)
-      fprintf(f, "opacity=\"%f\" ", (float)a / 255.0);
-    fprintf(f, "/>\n");
+
+  auto printRect =
+    [f](int x, int y, int width, int height, int r, int g, int b, int a, int pxScale) {
+      fprintf(f,
+              "<rect x=\"%d\" y=\"%d\" width=\"%d\" height=\"%d\" fill=\"#%02X%02X%02X\" ",
+              x * pxScale,
+              y * pxScale,
+              width * pxScale,
+              height * pxScale,
+              r,
+              g,
+              b);
+      if (a != 255)
+        fprintf(f, "opacity=\"%f\" ", (float)a / 255.0);
+      fprintf(f, "/>\n");
+    };
+
+  // Helper function for greedy merge of same-colored pixels
+  auto mergePixels = [&](auto getPixelColor) {
+    std::vector<std::vector<bool>> processed(image->height(),
+                                             std::vector<bool>(image->width(), false));
+
+    for (y = 0; y < image->height(); y++) {
+      for (x = 0; x < image->width(); x++) {
+        if (processed[y][x])
+          continue;
+
+        auto [pixelR, pixelG, pixelB, pixelA, shouldSkip] = getPixelColor(x, y);
+        if (shouldSkip) {
+          processed[y][x] = true;
+          continue;
+        }
+
+        // Find the largest rectangle starting from this pixel
+        int maxWidth = 0;
+        int maxHeight = 0;
+
+        // Find maximum width for current row
+        for (int w = x; w < image->width(); w++) {
+          if (processed[y][w])
+            break;
+          auto [checkR, checkG, checkB, checkA, skip] = getPixelColor(w, y);
+          if (skip || checkR != pixelR || checkG != pixelG || checkB != pixelB || checkA != pixelA)
+            break;
+          maxWidth = w - x + 1;
+        }
+
+        // Find maximum height with current width
+        for (int h = y; h < image->height(); h++) {
+          bool canExtend = true;
+          for (int w = x; w < x + maxWidth; w++) {
+            if (processed[h][w]) {
+              canExtend = false;
+              break;
+            }
+            auto [checkR, checkG, checkB, checkA, skip] = getPixelColor(w, h);
+            if (skip || checkR != pixelR || checkG != pixelG || checkB != pixelB ||
+                checkA != pixelA) {
+              canExtend = false;
+              break;
+            }
+          }
+          if (!canExtend)
+            break;
+          maxHeight = h - y + 1;
+        }
+
+        // Mark rectangle as processed and output it
+        for (int h = y; h < y + maxHeight; h++) {
+          for (int w = x; w < x + maxWidth; w++) {
+            processed[h][w] = true;
+          }
+        }
+
+        printRect(x, y, maxWidth, maxHeight, pixelR, pixelG, pixelB, pixelA, pixelScaleValue);
+      }
+      fop->setProgress((float)y / (float)(image->height()));
+    }
   };
+
   fprintf(f, "<?xml version=\"1.0\" encoding=\"UTF-8\" ?>\n");
   fprintf(
     f,
@@ -98,59 +164,55 @@ bool SvgFormat::onSave(FileOp* fop)
 
   switch (image->pixelFormat()) {
     case IMAGE_RGB: {
-      for (y = 0; y < image->height(); y++) {
-        for (x = 0; x < image->width(); x++) {
-          c = get_pixel_fast<RgbTraits>(image.get(), x, y);
-          alpha = rgba_geta(c);
-          if (alpha != 0x00)
-            printcol(x, y, rgba_getr(c), rgba_getg(c), rgba_getb(c), alpha, pixelScaleValue);
-        }
-        fop->setProgress((float)y / (float)(image->height()));
-      }
+      auto getPixelColor = [&](int px, int py) -> std::tuple<int, int, int, int, bool> {
+        c = get_pixel_fast<RgbTraits>(image.get(), px, py);
+        alpha = rgba_geta(c);
+        if (alpha == 0x00)
+          return { 0, 0, 0, 0, true };
+        return { rgba_getr(c), rgba_getg(c), rgba_getb(c), alpha, false };
+      };
+      mergePixels(getPixelColor);
       break;
     }
     case IMAGE_GRAYSCALE: {
-      for (y = 0; y < image->height(); y++) {
-        for (x = 0; x < image->width(); x++) {
-          c = get_pixel_fast<GrayscaleTraits>(image.get(), x, y);
-          auto v = graya_getv(c);
-          alpha = graya_geta(c);
-          if (alpha != 0x00)
-            printcol(x, y, v, v, v, alpha, pixelScaleValue);
-        }
-        fop->setProgress((float)y / (float)(image->height()));
-      }
+      auto getPixelColor = [&](int px, int py) -> std::tuple<int, int, int, int, bool> {
+        c = get_pixel_fast<GrayscaleTraits>(image.get(), px, py);
+        auto v = graya_getv(c);
+        alpha = graya_geta(c);
+        if (alpha == 0x00)
+          return { 0, 0, 0, 0, true };
+        return { v, v, v, alpha, false };
+      };
+      mergePixels(getPixelColor);
       break;
     }
     case IMAGE_INDEXED: {
       unsigned char image_palette[256][4];
-      for (y = 0; y < 256; y++) {
-        fop->sequenceGetColor(y, &r, &g, &b);
-        image_palette[y][0] = r;
-        image_palette[y][1] = g;
-        image_palette[y][2] = b;
-        fop->sequenceGetAlpha(y, &a);
-        image_palette[y][3] = a;
+      for (int i = 0; i < 256; i++) {
+        fop->sequenceGetColor(i, &r, &g, &b);
+        image_palette[i][0] = r;
+        image_palette[i][1] = g;
+        image_palette[i][2] = b;
+        fop->sequenceGetAlpha(i, &a);
+        image_palette[i][3] = a;
       }
       color_t mask_color = -1;
       if (fop->document()->sprite()->backgroundLayer() == NULL ||
           !fop->document()->sprite()->backgroundLayer()->isVisible()) {
         mask_color = fop->document()->sprite()->transparentColor();
       }
-      for (y = 0; y < image->height(); y++) {
-        for (x = 0; x < image->width(); x++) {
-          c = get_pixel_fast<IndexedTraits>(image.get(), x, y);
-          if (c != mask_color)
-            printcol(x,
-                     y,
-                     image_palette[c][0] & 0xff,
-                     image_palette[c][1] & 0xff,
-                     image_palette[c][2] & 0xff,
-                     image_palette[c][3] & 0xff,
-                     pixelScaleValue);
-        }
-        fop->setProgress((float)y / (float)(image->height()));
-      }
+
+      auto getPixelColor = [&](int px, int py) -> std::tuple<int, int, int, int, bool> {
+        c = get_pixel_fast<IndexedTraits>(image.get(), px, py);
+        if (c == mask_color)
+          return { 0, 0, 0, 0, true };
+        return { image_palette[c][0] & 0xff,
+                 image_palette[c][1] & 0xff,
+                 image_palette[c][2] & 0xff,
+                 image_palette[c][3] & 0xff,
+                 false };
+      };
+      mergePixels(getPixelColor);
       break;
     }
   }

src/app/file_system.cpp

@@ -1,5 +1,5 @@
 // Aseprite
-// Copyright (C) 2019-2024  Igara Studio S.A.
+// Copyright (C) 2019-2025  Igara Studio S.A.
 // Copyright (C) 2001-2018  David Capello
 //
 // This program is distributed under the terms of
@@ -82,6 +82,9 @@ public:
   unsigned int m_version;
   bool m_removed;
   mutable bool m_is_folder;
+#ifdef _WIN32
+  bool m_isHidden = false;
+#endif
   std::atomic<double> m_thumbnailProgress;
   std::atomic<os::Surface*> m_thumbnail;
 #ifdef _WIN32
@@ -266,7 +269,7 @@ IFileItem* FileSystemModule::getRootFileItem()
     fileitem->m_pidl = pidl;
     fileitem->m_fullpidl = pidl;
 
-    SFGAOF attrib = SFGAO_FOLDER;
+    SFGAOF attrib = SFGAO_FOLDER | SFGAO_HIDDEN;
     shl_idesktop->GetAttributesOf(1, (LPCITEMIDLIST*)&pidl, &attrib);
 
     update_by_pidl(fileitem, attrib);
@@ -357,7 +360,7 @@ bool FileItem::isHidden() const
   ASSERT(m_displayname != NOTINITIALIZED);
 
 #ifdef _WIN32
-  return false;
+  return m_isHidden;
 #else
   return m_displayname[0] == '.';
 #endif
@@ -462,7 +465,7 @@ const FileItemList& FileItem::children()
         // Get the interface to enumerate subitems
         hr = pFolder->EnumObjects(
           reinterpret_cast<HWND>(os::System::instance()->defaultWindow()->nativeHandle()),
-          SHCONTF_FOLDERS | SHCONTF_NONFOLDERS,
+          SHCONTF_FOLDERS | SHCONTF_NONFOLDERS | SHCONTF_INCLUDEHIDDEN,
           &pEnum);
 
         if (hr == S_OK && pEnum) {
@@ -473,10 +476,9 @@ const FileItemList& FileItem::children()
           while (pEnum->Next(256, itempidl, &fetched) == S_OK && fetched > 0) {
             // Request the SFGAO_FOLDER attribute to know what of the
             // item is file or a folder
-            for (c = 0; c < fetched; ++c) {
-              attribs[c] = SFGAO_FOLDER;
-              pFolder->GetAttributesOf(1, (LPCITEMIDLIST*)itempidl, attribs + c);
-            }
+            for (c = 0; c < fetched; ++c)
+              attribs[c] = SFGAO_FOLDER | SFGAO_HIDDEN;
+            pFolder->GetAttributesOf(fetched, (LPCITEMIDLIST*)itempidl, attribs);
 
             // Generate the FileItems
             for (c = 0; c < fetched; ++c) {
@@ -755,6 +757,9 @@ static void update_by_pidl(FileItem* fileitem, SFGAOF attrib)
   // Is it a folder?
 
   fileitem->m_is_folder = calc_is_folder(fileitem->m_filename, attrib);
+  #if _WIN32
+  fileitem->m_isHidden = (attrib & SFGAO_HIDDEN ? true : false);
+  #endif
 
   // Get the name to display
 

src/app/fonts/font_data.cpp

@@ -14,7 +14,9 @@
 #include "text/font.h"
 #include "text/font_mgr.h"
 #include "text/sprite_sheet_font.h"
+#include "text/typeface.h"
 #include "ui/manager.h"
+#include "ui/scale.h"
 
 #include <set>
 
@@ -87,9 +89,9 @@ text::FontRef FontData::getFont(text::FontMgrRef& fontMgr, float size)
 
   // Load fallback
   if (m_fallback) {
-    text::FontRef fallback = m_fallback->getFont(fontMgr, m_fallbackSize);
+    text::FontRef fallback = m_fallback->getFont(fontMgr, m_fallbackSize * ui::guiscale());
     if (font)
-      font->setFallback(fallback.get());
+      font->setFallback(fallback);
     else
       return fallback; // Don't double-cache the fallback font
   }

src/app/fonts/font_data.h

@@ -34,7 +34,8 @@ public:
   void setName(const std::string& name) { m_name = name; }
   void setFilename(const std::string& filename) { m_filename = filename; }
   void setDefaultSize(const float size) { m_size = size; }
-  void setAntialias(bool antialias) { m_antialias = antialias; }
+  void setAntialias(const bool antialias) { m_antialias = antialias; }
+  void setHinting(const text::FontHinting hinting) { m_hinting = hinting; }
   void setFallback(FontData* fallback, float fallbackSize)
   {
     m_fallback = fallback;

src/app/fonts/font_info.cpp

@@ -11,6 +11,7 @@
 #include "app/fonts/font_info.h"
 
 #include "app/fonts/font_data.h"
+#include "app/i18n/strings.h"
 #include "app/pref/preferences.h"
 #include "base/fs.h"
 #include "base/split_string.h"
@@ -142,19 +143,22 @@ std::string FontInfo::humanString() const
   }
   result += fmt::format(" {}pt", size());
   if (!result.empty()) {
-    if (style().weight() >= text::FontStyle::Weight::SemiBold)
-      result += " Bold";
+    if (style().weight() != text::FontStyle::Weight::Normal)
+      result +=
+        " " +
+        Strings::Translate(
+          fmt::format("font_style.font_weight_{}", static_cast<int>(style().weight())).c_str());
     if (style().slant() != text::FontStyle::Slant::Upright)
-      result += " Italic";
+      result += " " + Strings::font_style_italic();
     if (antialias())
-      result += " Antialias";
+      result += " " + Strings::font_style_antialias();
     if (ligatures())
-      result += " Ligatures";
+      result += " " + Strings::font_style_ligatures();
     switch (hinting()) {
-      case text::FontHinting::None:   result += " No Hinting"; break;
-      case text::FontHinting::Slight: result += " Slight Hinting"; break;
+      case text::FontHinting::None:   result += " " + Strings::font_style_hinting_none(); break;
+      case text::FontHinting::Slight: result += " " + Strings::font_style_hinting_slight(); break;
       case text::FontHinting::Normal: break;
-      case text::FontHinting::Full:   result += " Full Hinting"; break;
+      case text::FontHinting::Full:   result += " " + Strings::font_style_hinting_full(); break;
     }
   }
   return result;
@@ -177,6 +181,7 @@ app::FontInfo convert_to(const std::string& from)
   bool italic = false;
   app::FontInfo::Flags flags = app::FontInfo::Flags::None;
   text::FontHinting hinting = text::FontHinting::Normal;
+  text::FontStyle::Weight weight = text::FontStyle::Weight::Normal;
 
   if (!parts.empty()) {
     if (parts[0].compare(0, 5, "file=") == 0) {
@@ -214,16 +219,17 @@ app::FontInfo convert_to(const std::string& from)
         else if (hintingStr == "full")
           hinting = text::FontHinting::Full;
       }
+      else if (parts[i].compare(0, 7, "weight=") == 0) {
+        std::string weightStr = parts[i].substr(7);
+        weight = static_cast<text::FontStyle::Weight>(std::atoi(weightStr.c_str()));
+      }
     }
   }
 
-  text::FontStyle style;
-  if (bold && italic)
-    style = text::FontStyle::BoldItalic();
-  else if (bold)
-    style = text::FontStyle::Bold();
-  else if (italic)
-    style = text::FontStyle::Italic();
+  const text::FontStyle style(
+    bold ? text::FontStyle::Weight::Bold : weight,
+    text::FontStyle::Width::Normal,
+    italic ? text::FontStyle::Slant::Italic : text::FontStyle::Slant::Upright);
 
   return app::FontInfo(type, name, size, style, flags, hinting);
 }
@@ -243,7 +249,7 @@ std::string convert_to(const app::FontInfo& from)
   if (!result.empty()) {
     if (from.size() > 0.0f)
       result += fmt::format(",size={}", from.size());
-    if (from.style().weight() >= text::FontStyle::Weight::SemiBold)
+    if (from.style().weight() == text::FontStyle::Weight::Bold)
       result += ",bold";
     if (from.style().slant() != text::FontStyle::Slant::Upright)
       result += ",italic";
@@ -262,6 +268,8 @@ std::string convert_to(const app::FontInfo& from)
         case text::FontHinting::Full: result += "full"; break;
       }
     }
+    if (from.style().weight() != text::FontStyle::Weight::Bold)
+      result += ",weight=" + std::to_string(static_cast<int>(from.style().weight()));
   }
   return result;
 }

src/app/modules/gfx.cpp

@@ -1,5 +1,5 @@
 // Aseprite
-// Copyright (C) 2018-2024  Igara Studio S.A.
+// Copyright (C) 2018-2025  Igara Studio S.A.
 // Copyright (C) 2001-2018  David Capello
 //
 // This program is distributed under the terms of
@@ -30,6 +30,7 @@
 #include "os/surface.h"
 #include "os/system.h"
 #include "ui/intern.h"
+#include "ui/paint.h"
 #include "ui/system.h"
 #include "ui/theme.h"
 
@@ -118,9 +119,6 @@ void draw_color(ui::Graphics* g,
   app::Color color = _color;
   const int alpha = color.getAlpha();
 
-  // Color space conversion
-  auto convertColor = convert_from_current_to_screen_color_space();
-
   if (alpha < 255) {
     if (rc.w == rc.h)
       draw_checkered_grid(g, rc, gfx::Size(rc.w / 2, rc.h / 2));
@@ -133,11 +131,15 @@ void draw_color(ui::Graphics* g,
       color = app::Color::fromGray(color.getGray(), color.getAlpha());
     }
 
+    // The color is in the current sprite color space.
+    ui::Paint paint;
+    paint.color(color_utils::color_for_ui(color), get_current_color_space(g->display()).get());
+
     if (color.getType() == app::Color::IndexType) {
       int index = color.getIndex();
 
       if (index >= 0 && index < get_current_palette()->size()) {
-        g->fillRect(convertColor(color_utils::color_for_ui(color)), rc);
+        g->drawRect(rc, paint);
       }
       else {
         g->fillRect(gfx::rgba(0, 0, 0), rc);
@@ -147,7 +149,7 @@ void draw_color(ui::Graphics* g,
       }
     }
     else {
-      g->fillRect(convertColor(color_utils::color_for_ui(color)), rc);
+      g->drawRect(rc, paint);
     }
   }
 }
@@ -219,7 +221,8 @@ void draw_tile(ui::Graphics* g, const Rect& rc, const Site& site, doc::tile_t ti
   int w = tileImage->width();
   int h = tileImage->height();
 
-  os::SurfaceRef surface = os::System::instance()->makeRgbaSurface(w, h);
+  os::SurfaceRef surface =
+    os::System::instance()->makeRgbaSurface(w, h, get_current_color_space(g->display()));
   convert_image_to_surface(tileImage.get(), get_current_palette(), surface.get(), 0, 0, 0, 0, w, h);
 
   ui::Paint paint;

src/app/modules/gui.cpp

@@ -406,7 +406,7 @@ void load_window_pos(Window* window, const char* section, const bool limitMinSiz
   if (get_multiple_displays()) {
     Rect frame = get_config_rect(section, "WindowFrame", gfx::Rect());
     if (!frame.isEmpty()) {
-      limit_with_workarea(parentDisplay, frame);
+      limit_least(frame);
       window->loadNativeFrame(frame);
     }
   }
@@ -680,82 +680,77 @@ void CustomizedGuiManager::onNewDisplayConfiguration(Display* display)
 
 bool CustomizedGuiManager::processKey(Message* msg)
 {
-  App* app = App::instance();
   const KeyboardShortcuts* keys = KeyboardShortcuts::instance();
-  const KeyContext contexts[] = { keys->getCurrentKeyContext(), KeyContext::Normal };
-  int n = (contexts[0] != contexts[1] ? 2 : 1);
-  for (int i = 0; i < n; ++i) {
-    for (const KeyPtr& key : *keys) {
-      if (key->isPressed(msg, *keys, contexts[i])) {
-        // Cancel menu-bar loops (to close any popup menu)
-        app->mainWindow()->getMenuBar()->cancelMenuLoop();
+  const KeyPtr key = keys->findBestKeyFromMessage(msg);
+  if (!key)
+    return false;
 
-        switch (key->type()) {
-          case KeyType::Tool: {
-            tools::Tool* current_tool = app->activeTool();
-            tools::Tool* select_this_tool = key->tool();
-            tools::ToolBox* toolbox = app->toolBox();
-            std::vector<tools::Tool*> possibles;
+  // Cancel menu-bar loops (to close any popup menu)
+  App* app = App::instance();
+  app->mainWindow()->getMenuBar()->cancelMenuLoop();
 
-            // Collect all tools with the pressed keyboard-shortcut
-            for (tools::Tool* tool : *toolbox) {
-              const KeyPtr key = keys->tool(tool);
-              if (key && key->isPressed(msg, *keys))
-                possibles.push_back(tool);
-            }
+  switch (key->type()) {
+    case KeyType::Tool: {
+      tools::Tool* current_tool = app->activeTool();
+      tools::Tool* select_this_tool = key->tool();
+      tools::ToolBox* toolbox = app->toolBox();
+      std::vector<tools::Tool*> possibles;
 
-            if (possibles.size() >= 2) {
-              bool done = false;
+      // Collect all tools with the pressed keyboard-shortcut
+      for (tools::Tool* tool : *toolbox) {
+        const KeyPtr key = keys->tool(tool);
+        if (key && key->isPressed(msg))
+          possibles.push_back(tool);
+      }
 
-              for (size_t i = 0; i < possibles.size(); ++i) {
-                if (possibles[i] != current_tool &&
-                    ToolBar::instance()->isToolVisible(possibles[i])) {
-                  select_this_tool = possibles[i];
-                  done = true;
-                  break;
-                }
-              }
+      if (possibles.size() >= 2) {
+        bool done = false;
 
-              if (!done) {
-                for (size_t i = 0; i < possibles.size(); ++i) {
-                  // If one of the possibilities is the current tool
-                  if (possibles[i] == current_tool) {
-                    // We select the next tool in the possibilities
-                    select_this_tool = possibles[(i + 1) % possibles.size()];
-                    break;
-                  }
-                }
-              }
-            }
-
-            ToolBar::instance()->selectTool(select_this_tool);
-            return true;
-          }
-
-          case KeyType::Command: {
-            Command* command = key->command();
-
-            // Commands are executed only when the main window is
-            // the current window running.
-            if (getForegroundWindow() == app->mainWindow()) {
-              // OK, so we can execute the command represented
-              // by the pressed-key in the message...
-              UIContext::instance()->executeCommandFromMenuOrShortcut(command, key->params());
-              return true;
-            }
-            break;
-          }
-
-          case KeyType::Quicktool: {
-            // Do nothing, it is used in the editor through the
-            // KeyboardShortcuts::getCurrentQuicktool() function.
+        for (size_t i = 0; i < possibles.size(); ++i) {
+          if (possibles[i] != current_tool && ToolBar::instance()->isToolVisible(possibles[i])) {
+            select_this_tool = possibles[i];
+            done = true;
             break;
           }
         }
-        break;
+
+        if (!done) {
+          for (size_t i = 0; i < possibles.size(); ++i) {
+            // If one of the possibilities is the current tool
+            if (possibles[i] == current_tool) {
+              // We select the next tool in the possibilities
+              select_this_tool = possibles[(i + 1) % possibles.size()];
+              break;
+            }
+          }
+        }
       }
+
+      ToolBar::instance()->selectTool(select_this_tool);
+      return true;
+    }
+
+    case KeyType::Command: {
+      Command* command = key->command();
+
+      // Commands are executed only when the main window is
+      // the current window running.
+      if (getForegroundWindow() == app->mainWindow()) {
+        // OK, so we can execute the command represented
+        // by the pressed-key in the message...
+        UIContext::instance()->executeCommandFromMenuOrShortcut(command, key->params());
+        return true;
+      }
+      break;
+    }
+
+    case KeyType::Quicktool: {
+      // Do nothing, it is used in the editor through the
+      // KeyboardShortcuts::getCurrentQuicktool() function.
+      break;
     }
   }
+
   return false;
 }
 

src/app/resource_finder.cpp

@@ -213,7 +213,7 @@ void ResourceFinder::includeDesktopDir(const char* filename)
 #ifdef _WIN32
 
   std::vector<wchar_t> buf(MAX_PATH);
-  HRESULT hr = SHGetFolderPath(NULL, CSIDL_DESKTOPDIRECTORY, NULL, SHGFP_TYPE_DEFAULT, &buf[0]);
+  HRESULT hr = SHGetFolderPath(NULL, CSIDL_DESKTOP, NULL, SHGFP_TYPE_CURRENT, &buf[0]);
   if (hr == S_OK) {
     addPath(base::join_path(base::to_utf8(&buf[0]), filename));
   }

src/app/script/api_version.h

@@ -10,6 +10,6 @@
 
 // Increment this value if the scripting API is modified between two
 // released Aseprite versions.
-#define API_VERSION 32
+#define API_VERSION 35
 
 #endif

src/app/script/app_object.cpp

@@ -34,10 +34,10 @@
 #include "app/tools/tool_loop_manager.h"
 #include "app/tx.h"
 #include "app/ui/context_bar.h"
-#include "app/ui/doc_view.h"
 #include "app/ui/editor/editor.h"
 #include "app/ui/editor/tool_loop_impl.h"
 #include "app/ui/main_window.h"
+#include "app/ui/status_bar.h"
 #include "app/ui/timeline/timeline.h"
 #include "app/ui_context.h"
 #include "base/fs.h"
@@ -498,6 +498,44 @@ int App_useTool(lua_State* L)
   return 0;
 }
 
+int App_tip(lua_State* L)
+{
+  const auto* ctx = App::instance()->context();
+  if (!ctx || !ctx->isUIAvailable() || !StatusBar::instance())
+    return 0; // No UI to show the tooltip
+
+  std::string text;
+  double duration = 2.0;
+
+  if (lua_istable(L, 1)) {
+    int type = lua_getfield(L, 1, "text");
+    if (type == LUA_TSTRING)
+      text = lua_tostring(L, -1);
+    lua_pop(L, 1);
+
+    type = lua_getfield(L, 1, "duration");
+    if (type == LUA_TNUMBER)
+      duration = lua_tonumber(L, -1);
+    lua_pop(L, 1);
+  }
+  else {
+    if (!lua_isstring(L, 1))
+      return luaL_error(L, "app.tip text parameter must be a string");
+
+    text = lua_tostring(L, 1);
+
+    if (lua_isnumber(L, 2))
+      duration = lua_tonumber(L, 2);
+  }
+
+  if (text.empty())
+    return luaL_error(L, "app.tip text cannot be empty");
+
+  int msecs = std::clamp<int>(duration * 1000.0, 500, 30000);
+  StatusBar::instance()->showTip(msecs, text);
+  return 0;
+}
+
 int App_get_events(lua_State* L)
 {
   push_app_events(L);
@@ -820,6 +858,7 @@ const luaL_Reg App_methods[] = {
   { "alert",       App_alert       },
   { "refresh",     App_refresh     },
   { "useTool",     App_useTool     },
+  { "tip",         App_tip         },
   { nullptr,       nullptr         }
 };
 

src/app/script/canvas_widget.cpp

@@ -1,11 +1,12 @@
 // Aseprite
-// Copyright (c) 2022-2024  Igara Studio S.A.
+// Copyright (c) 2022-2025  Igara Studio S.A.
 //
 // This program is distributed under the terms of
 // the End-User License Agreement for Aseprite.
 
 #include "app/script/canvas_widget.h"
 
+#include "app/color_spaces.h"
 #include "app/script/graphics_context.h"
 #include "app/ui/skin/skin_theme.h"
 #include "os/system.h"
@@ -45,7 +46,7 @@ void Canvas::callPaint()
     return;
 
   os::Paint p;
-  p.color(bgColor());
+  p.color(bgColor(), m_surface->colorSpace().get());
   m_surface->drawRect(m_surface->bounds(), p);
 
   // Draw only on resize (onPaint we draw the cached m_surface)
@@ -189,7 +190,9 @@ void Canvas::onResize(ui::ResizeEvent& ev)
     }
 
     if (!m_surface || m_surface->width() != w || m_surface->height() != h) {
-      m_surface = system->makeSurface(w, h);
+      ui::Display* display = this->display();
+      os::ColorSpaceRef cs = (display ? display->colorSpace() : nullptr);
+      m_surface = system->makeSurface(w, h, cs);
       callPaint();
     }
   }

src/app/script/dialog_class.cpp

@@ -60,6 +60,8 @@ namespace app { namespace script {
 
 using namespace ui;
 
+static constexpr const int kDefaultAutofit = ui::LEFT | ui::TOP;
+
 namespace {
 
 class DialogWindow : public WindowWithHand {
@@ -107,6 +109,7 @@ struct Dialog {
   std::map<std::string, ui::Widget*> dataWidgets;
   std::map<std::string, ui::Widget*> labelWidgets;
   int currentRadioGroup = 0;
+  int autofit = kDefaultAutofit;
 
   // Member used to hold current state about the creation of a tabs
   // widget. After creation it is reset to null to be ready for the
@@ -127,12 +130,13 @@ struct Dialog {
   int showRef = LUA_REFNIL;
   lua_State* L = nullptr;
 
-  Dialog(const ui::Window::Type windowType, const std::string& title)
+  Dialog(const ui::Window::Type windowType, const std::string& title, bool sizeable)
     : window(windowType, title)
     , grid(2, false)
     , currentGrid(&grid)
   {
     window.addChild(&grid);
+    window.setSizeable(sizeable);
     all_dialogs.push_back(this);
   }
 
@@ -192,12 +196,20 @@ struct Dialog {
       it->second->setText(text);
   }
 
+  void setAutofit(int align)
+  {
+    // Accept both 0 or a valid subset of align parameters.
+    if (align == 0 || (align & (ui::LEFT | ui::RIGHT | ui::TOP | ui::BOTTOM)))
+      autofit = align;
+  }
+
   Display* parentDisplay() const
   {
     Display* parentDisplay = window.parentDisplay();
     if (!parentDisplay) {
-      const auto mainWindow = App::instance()->mainWindow();
-      parentDisplay = mainWindow->display();
+      const auto* mainWindow = App::instance()->mainWindow();
+      if (mainWindow)
+        parentDisplay = mainWindow->display();
     }
     return parentDisplay;
   }
@@ -209,6 +221,9 @@ struct Dialog {
     // origin/scale (or main window if a parent window wasn't specified).
     if (window.ownDisplay()) {
       const Display* parentDisplay = this->parentDisplay();
+      if (!parentDisplay)
+        return bounds;
+
       const int scale = parentDisplay->scale();
       const gfx::Point dialogOrigin = window.display()->nativeWindow()->contentRect().origin();
       const gfx::Point mainOrigin = parentDisplay->nativeWindow()->contentRect().origin();
@@ -223,6 +238,9 @@ struct Dialog {
       window.expandWindow(rc.size());
 
       Display* parentDisplay = this->parentDisplay();
+      if (!parentDisplay)
+        return;
+
       const int scale = parentDisplay->scale();
       const gfx::Point mainOrigin = parentDisplay->nativeWindow()->contentRect().origin();
       gfx::Rect frame = window.display()->nativeWindow()->contentRect();
@@ -230,8 +248,10 @@ struct Dialog {
       window.display()->nativeWindow()->setFrame(frame);
     }
     else {
+      gfx::Rect oldBounds(window.bounds());
       window.setBounds(rc);
       window.invalidate();
+      parentDisplay()->invalidateRect(oldBounds);
     }
   }
 
@@ -365,6 +385,8 @@ int Dialog_new(lua_State* L)
   // Get the title and the type of window (with or without title bar)
   ui::Window::Type windowType = ui::Window::WithTitleBar;
   std::string title = "Script";
+  bool sizeable = true;
+  int autofit = kDefaultAutofit;
   if (lua_isstring(L, 1)) {
     title = lua_tostring(L, 1);
   }
@@ -378,9 +400,21 @@ int Dialog_new(lua_State* L)
     if (type != LUA_TNIL && lua_toboolean(L, -1))
       windowType = ui::Window::WithoutTitleBar;
     lua_pop(L, 1);
+
+    type = lua_getfield(L, 1, "resizeable");
+    if (type != LUA_TNIL && !lua_toboolean(L, -1))
+      sizeable = false;
+    lua_pop(L, 1);
+
+    type = lua_getfield(L, 1, "autofit");
+    if (type != LUA_TNIL) {
+      autofit = lua_tointeger(L, -1);
+    }
+    lua_pop(L, 1);
   }
 
-  auto dlg = push_new<Dialog>(L, windowType, title);
+  auto dlg = push_new<Dialog>(L, windowType, title, sizeable);
+  dlg->setAutofit(autofit);
 
   // The uservalue of the dialog userdata will contain a table that
   // stores all the callbacks to handle events. As these callbacks can
@@ -575,8 +609,9 @@ int Dialog_add_widget(lua_State* L, Widget* widget)
   bool vexpand = (widget->type() == Canvas::Type());
 
   // This is to separate different kind of widgets without label in
-  // different rows.
-  if (dlg->lastWidgetType != widget->type() || dlg->autoNewRow) {
+  // different rows. Separator widgets will always create a new row.
+  if (dlg->lastWidgetType != widget->type() || dlg->autoNewRow ||
+      widget->type() == ui::kSeparatorWidget) {
     dlg->lastWidgetType = widget->type();
     dlg->hbox = nullptr;
   }
@@ -631,8 +666,8 @@ int Dialog_add_widget(lua_State* L, Widget* widget)
         dlg->labelWidgets[id] = labelWidget;
     }
     else {
-      // For tabs we don't want the empty space of an unspecified label.
-      if (widget->type() != Tabs::Type()) {
+      // For tabs and separators, we don't want the empty space of an unspecified label.
+      if (widget->type() != Tabs::Type() && widget->type() != ui::kSeparatorWidget) {
         dlg->currentGrid->addChildInCell(new ui::HBox, 1, 1, ui::LEFT | ui::TOP);
       }
     }
@@ -641,14 +676,15 @@ int Dialog_add_widget(lua_State* L, Widget* widget)
     if (widget->type() == ui::kButtonWidget)
       hbox->enableFlags(ui::HOMOGENEOUS);
 
-    // For tabs we don't want the empty space of an unspecified label, so
+    // For tabs and unlabeled separators, we don't want the empty space of an unspecified label, so
     // span 2 columns.
-    const int hspan = (widget->type() == Tabs::Type() ? 2 : 1);
+    const int hspan =
+      ((widget->type() == Tabs::Type()) || (widget->type() == ui::kSeparatorWidget && !label) ? 2 :
+                                                                                                1);
     dlg->currentGrid->addChildInCell(hbox,
                                      hspan,
                                      1,
                                      ui::HORIZONTAL | (vexpand ? ui::VERTICAL : ui::TOP));
-
     dlg->hbox = hbox;
   }
 
@@ -709,12 +745,7 @@ int Dialog_separator(lua_State* L)
     dlg->dataWidgets[id] = widget;
   }
 
-  dlg->mainWidgets.push_back(widget);
-  dlg->currentGrid->addChildInCell(widget, 2, 1, ui::HORIZONTAL | ui::TOP);
-  dlg->hbox = nullptr;
-
-  lua_pushvalue(L, 1);
-  return 1;
+  return Dialog_add_widget(L, widget);
 }
 
 int Dialog_label(lua_State* L)
@@ -1512,6 +1543,10 @@ int Dialog_modify(lua_State* L)
     type = lua_getfield(L, 2, "text");
     if (const char* s = lua_tostring(L, -1)) {
       widget->setText(s);
+
+      // Re-process mnemonics for buttons
+      if (widget->type() == WidgetType::kButtonWidget)
+        widget->processMnemonicFromText();
       relayout = true;
     }
     lua_pop(L, 1);
@@ -1629,6 +1664,10 @@ int Dialog_modify(lua_State* L)
     lua_pop(L, 1);
 
     type = lua_getfield(L, 2, "mouseCursor");
+    if (type == LUA_TNIL) {
+      lua_pop(L, 1);
+      type = lua_getfield(L, 2, "mousecursor");
+    }
     if (type != LUA_TNIL) {
       if (auto canvas = dynamic_cast<Canvas*>(widget)) {
         auto cursor = (ui::CursorType)lua_tointeger(L, -1);
@@ -1646,8 +1685,26 @@ int Dialog_modify(lua_State* L)
     if (relayout && !dlg->window.isResizing()) {
       dlg->window.layout();
 
-      gfx::Rect bounds(dlg->window.bounds().w, dlg->window.sizeHint().h);
-      dlg->window.expandWindow(bounds.size());
+      if (dlg->autofit > 0) {
+        gfx::Rect oldBounds = dlg->window.bounds();
+        gfx::Size resize(oldBounds.size());
+
+        if (dlg->autofit & ui::TOP || dlg->autofit & ui::BOTTOM)
+          resize.h = dlg->window.sizeHint().h;
+        if (dlg->autofit & ui::LEFT || dlg->autofit & ui::RIGHT)
+          resize.w = dlg->window.sizeHint().w;
+
+        gfx::Size difference = resize - oldBounds.size();
+        const auto& bounds = dlg->getWindowBounds();
+        gfx::Rect newBounds(bounds.x, bounds.y, resize.w, resize.h);
+
+        if (dlg->autofit & ui::BOTTOM)
+          newBounds.y = bounds.y - difference.h;
+        if (dlg->autofit & ui::RIGHT)
+          newBounds.x = bounds.x - difference.w;
+
+        dlg->setWindowBounds(newBounds);
+      }
     }
   }
   lua_pushvalue(L, 1);
@@ -1869,6 +1926,27 @@ int Dialog_get_bounds(lua_State* L)
   return 1;
 }
 
+int Dialog_get_sizeHint(lua_State* L)
+{
+  auto dlg = get_obj<Dialog>(L, 1);
+  push_new<gfx::Size>(L, dlg->window.sizeHint());
+  return 1;
+}
+
+int Dialog_get_autofit(lua_State* L)
+{
+  auto dlg = get_obj<Dialog>(L, 1);
+  lua_pushinteger(L, dlg->autofit);
+  return 1;
+}
+
+int Dialog_set_autofit(lua_State* L)
+{
+  auto dlg = get_obj<Dialog>(L, 1);
+  dlg->setAutofit(lua_tointeger(L, 2));
+  return 0;
+}
+
 int Dialog_set_bounds(lua_State* L)
 {
   auto dlg = get_obj<Dialog>(L, 1);
@@ -1910,9 +1988,11 @@ const luaL_Reg Dialog_methods[] = {
 };
 
 const Property Dialog_properties[] = {
-  { "data",   Dialog_get_data,   Dialog_set_data   },
-  { "bounds", Dialog_get_bounds, Dialog_set_bounds },
-  { nullptr,  nullptr,           nullptr           }
+  { "data",     Dialog_get_data,     Dialog_set_data    },
+  { "bounds",   Dialog_get_bounds,   Dialog_set_bounds  },
+  { "autofit",  Dialog_get_autofit,  Dialog_set_autofit },
+  { "sizeHint", Dialog_get_sizeHint, nullptr            },
+  { nullptr,    nullptr,             nullptr            }
 };
 
 } // anonymous namespace

src/app/script/engine.cpp

@@ -452,6 +452,7 @@ Engine::Engine() : L(luaL_newstate()), m_delegate(nullptr), m_printLastResult(fa
   lua_setglobal(L, "FlipType");
   setfield_integer(L, "HORIZONTAL", doc::algorithm::FlipType::FlipHorizontal);
   setfield_integer(L, "VERTICAL", doc::algorithm::FlipType::FlipVertical);
+  setfield_integer(L, "DIAGONAL", doc::algorithm::FlipType::FlipDiagonal);
   lua_pop(L, 1);
 
   lua_newtable(L);

src/app/script/events_class.cpp

@@ -370,6 +370,10 @@ public:
 #if ENABLE_REMAP_TILESET_EVENT
     RemapTileset,
 #endif
+    LayerBlendMode,
+    LayerName,
+    LayerOpacity,
+    LayerVisibility,
   };
 
   SpriteEvents(const Sprite* sprite) : m_spriteId(sprite->id()) { doc()->add_observer(this); }
@@ -401,6 +405,14 @@ public:
     else if (std::strcmp(eventName, "remaptileset") == 0)
       return RemapTileset;
 #endif
+    else if (std::strcmp(eventName, "layerblendmode") == 0)
+      return LayerBlendMode;
+    else if (std::strcmp(eventName, "layername") == 0)
+      return LayerName;
+    else if (std::strcmp(eventName, "layeropacity") == 0)
+      return LayerOpacity;
+    else if (std::strcmp(eventName, "layervisibility") == 0)
+      return LayerVisibility;
     else
       return Unknown;
   }
@@ -460,6 +472,38 @@ public:
     });
   }
 
+  void onLayerBlendModeChange(DocEvent& ev) override
+  {
+    call(LayerBlendMode,
+         {
+           { "layer", ev.layer() }
+    });
+  }
+
+  void onLayerNameChange(DocEvent& ev) override
+  {
+    call(LayerName,
+         {
+           { "layer", ev.layer() }
+    });
+  }
+
+  void onLayerOpacityChange(DocEvent& ev) override
+  {
+    call(LayerOpacity,
+         {
+           { "layer", ev.layer() }
+    });
+  }
+
+  void onAfterLayerVisibilityChange(DocEvent& ev) override
+  {
+    call(LayerVisibility,
+         {
+           { "layer", ev.layer() }
+    });
+  }
+
 private:
   void onAddFirstListener(EventType eventType) override
   {

src/app/script/layer_class.cpp

@@ -22,6 +22,7 @@
 #include "app/script/luacpp.h"
 #include "app/script/userdata.h"
 #include "app/tx.h"
+#include "app/ui/timeline/timeline.h"
 #include "doc/layer.h"
 #include "doc/layer_tilemap.h"
 #include "doc/sprite.h"
@@ -355,6 +356,9 @@ int Layer_set_isCollapsed(lua_State* L)
 {
   auto layer = get_docobj<Layer>(L, 1);
   layer->setCollapsed(lua_toboolean(L, 2));
+
+  if (auto* timeline = App::instance()->timeline())
+    timeline->refresh();
   return 0;
 }
 
@@ -362,6 +366,9 @@ int Layer_set_isExpanded(lua_State* L)
 {
   auto layer = get_docobj<Layer>(L, 1);
   layer->setCollapsed(!lua_toboolean(L, 2));
+
+  if (auto* timeline = App::instance()->timeline())
+    timeline->refresh();
   return 0;
 }
 

src/app/script/plugin_class.cpp

@@ -29,11 +29,16 @@ struct Plugin {
 
 class PluginCommand : public Command {
 public:
-  PluginCommand(const std::string& id, const std::string& title, int onclickRef, int onenabledRef)
+  PluginCommand(const std::string& id,
+                const std::string& title,
+                int onclickRef,
+                int onenabledRef,
+                int oncheckedRef)
     : Command(id.c_str(), CmdUIOnlyFlag)
     , m_title(title)
     , m_onclickRef(onclickRef)
     , m_onenabledRef(onenabledRef)
+    , m_oncheckedRef(oncheckedRef)
   {
   }
 
@@ -72,28 +77,42 @@ protected:
   bool onEnabled(Context* context) override
   {
     if (m_onenabledRef) {
-      script::Engine* engine = App::instance()->scriptEngine();
-      lua_State* L = engine->luaState();
-
-      lua_rawgeti(L, LUA_REGISTRYINDEX, m_onenabledRef);
-      if (lua_pcall(L, 0, 1, 0)) {
-        if (const char* s = lua_tostring(L, -1)) {
-          Console().printf("Error: %s", s);
-          return false;
-        }
-      }
-      else {
-        bool ret = lua_toboolean(L, -1);
-        lua_pop(L, 1);
-        return ret;
-      }
+      return callScriptRef(m_onenabledRef);
     }
     return true;
   }
 
+  bool onChecked(Context* context) override
+  {
+    if (m_oncheckedRef) {
+      return callScriptRef(m_oncheckedRef);
+    }
+    return false;
+  }
+
+private:
+  bool callScriptRef(int ref)
+  {
+    ASSERT(ref);
+    script::Engine* engine = App::instance()->scriptEngine();
+    lua_State* L = engine->luaState();
+
+    lua_rawgeti(L, LUA_REGISTRYINDEX, ref);
+    if (lua_pcall(L, 0, 1, 0)) {
+      if (const char* s = lua_tostring(L, -1))
+        Console().printf("Error: %s", s);
+      return false;
+    }
+
+    bool ret = lua_toboolean(L, -1);
+    lua_pop(L, 1);
+    return ret;
+  }
+
   std::string m_title;
   int m_onclickRef;
   int m_onenabledRef;
+  int m_oncheckedRef;
 };
 
 void deleteCommandIfExistent(Extension* ext, const std::string& id)
@@ -126,6 +145,7 @@ int Plugin_newCommand(lua_State* L)
   if (lua_istable(L, 2)) {
     std::string id, title, group;
     int onenabledRef = 0;
+    int oncheckedRef = 0;
 
     lua_getfield(L, 2, "id");
     if (const char* s = lua_tostring(L, -1)) {
@@ -156,6 +176,14 @@ int Plugin_newCommand(lua_State* L)
       lua_pop(L, 1);
     }
 
+    type = lua_getfield(L, 2, "onchecked");
+    if (type == LUA_TFUNCTION) {
+      oncheckedRef = luaL_ref(L, LUA_REGISTRYINDEX); // does a pop
+    }
+    else {
+      lua_pop(L, 1);
+    }
+
     type = lua_getfield(L, 2, "onclick");
     if (type == LUA_TFUNCTION) {
       int onclickRef = luaL_ref(L, LUA_REGISTRYINDEX);
@@ -164,7 +192,7 @@ int Plugin_newCommand(lua_State* L)
       // overwriting a previous registered command)
       deleteCommandIfExistent(plugin->ext, id);
 
-      auto cmd = new PluginCommand(id, title, onclickRef, onenabledRef);
+      auto cmd = new PluginCommand(id, title, onclickRef, onenabledRef, oncheckedRef);
       Commands::instance()->add(cmd);
       plugin->ext->addCommand(id);
 
@@ -172,6 +200,7 @@ int Plugin_newCommand(lua_State* L)
       if (!group.empty() && App::instance()->isGui()) { // On CLI menus do not make sense
         if (auto appMenus = AppMenus::instance()) {
           auto menuItem = std::make_unique<AppMenuItem>(title, id);
+          menuItem->processMnemonicFromText();
           appMenus->addMenuItemIntoGroup(group, std::move(menuItem));
         }
       }

src/app/script/security.cpp

@@ -40,6 +40,8 @@ int secure_io_lines(lua_State* L);
 int secure_io_input(lua_State* L);
 int secure_io_output(lua_State* L);
 int secure_os_execute(lua_State* L);
+int secure_os_remove(lua_State* L);
+int secure_os_rename(lua_State* L);
 int secure_package_loadlib(lua_State* L);
 
 enum {
@@ -49,6 +51,8 @@ enum {
   io_input,
   io_output,
   os_execute,
+  os_remove,
+  os_rename,
   package_loadlib,
 };
 
@@ -64,6 +68,8 @@ static struct {
   { "io",      "input",   secure_io_input        },
   { "io",      "output",  secure_io_output       },
   { "os",      "execute", secure_os_execute      },
+  { "os",      "remove",  secure_os_remove       },
+  { "os",      "rename",  secure_os_rename       },
   { "package", "loadlib", secure_package_loadlib },
 };
 
@@ -185,6 +191,81 @@ int secure_os_execute(lua_State* L)
   return replaced_functions[os_execute].origfunc(L);
 }
 
+int file_result(lua_State* L, bool result, int errorNo = 0, const std::string& fileName = "")
+{
+  if (result) {
+    lua_pushboolean(L, 1);
+    return 1;
+  }
+
+  luaL_pushfail(L);
+  if (fileName.empty())
+    lua_pushstring(L, strerror(errorNo));
+  else
+    lua_pushfstring(L, "%s: %s", fileName.c_str(), strerror(errorNo));
+  lua_pushinteger(L, errorNo);
+  return 3;
+}
+
+int secure_os_remove(lua_State* L)
+{
+  const std::string absFilename = base::get_canonical_path(luaL_checkstring(L, 1));
+  if (absFilename.empty())
+    return file_result(L, false, ENOENT, absFilename);
+
+  if (!ask_access(L, absFilename.data(), FileAccessMode::Write, ResourceType::File))
+    return file_result(L, false, EACCES, absFilename);
+
+  if (base::is_directory(absFilename)) {
+    try {
+      base::remove_directory(absFilename);
+      return file_result(L, true);
+    }
+    catch (const std::exception&) {
+      return file_result(L, false, EIO, absFilename);
+    }
+  }
+
+  try {
+    base::delete_file(absFilename);
+  }
+  catch (const std::exception&) {
+    return file_result(L, false, EIO, absFilename);
+  }
+
+  return file_result(L, true);
+}
+
+int secure_os_rename(lua_State* L)
+{
+  const std::string absSourceFilename = base::get_canonical_path(luaL_checkstring(L, 1));
+  const std::string absDestFilename = base::get_absolute_path(luaL_checkstring(L, 2));
+  lua_pop(L, 2);
+
+  if (absSourceFilename.empty())
+    return file_result(L, false, ENOENT, absSourceFilename);
+
+  if (absDestFilename.empty())
+    return file_result(L, false, EINVAL, absDestFilename);
+
+  if (!ask_access(L, absSourceFilename.data(), FileAccessMode::Write, ResourceType::File))
+    return file_result(L, false, EACCES, absSourceFilename);
+
+  try {
+    // If the destination file already exists, we should ask for permission to overwrite it.
+    if (!base::get_canonical_path(absDestFilename).empty() &&
+        !ask_access(L, absDestFilename.data(), FileAccessMode::Write, ResourceType::File)) {
+      return file_result(L, false, EACCES, absDestFilename);
+    }
+
+    base::move_file(absSourceFilename, absDestFilename);
+    return file_result(L, true);
+  }
+  catch (const std::exception&) {
+    return file_result(L, false, EIO, absSourceFilename);
+  }
+}
+
 int secure_package_loadlib(lua_State* L)
 {
   const char* cmd = luaL_checkstring(L, 1);
@@ -201,7 +282,7 @@ void overwrite_unsecure_functions(lua_State* L)
 {
   // Remove unsupported functions
   lua_getglobal(L, "os");
-  for (const char* name : { "remove", "rename", "exit", "tmpname" }) {
+  for (const char* name : { "exit", "tmpname" }) {
     lua_pushcfunction(L, unsupported);
     lua_setfield(L, -2, name);
   }
@@ -280,7 +361,15 @@ bool ask_access(lua_State* L,
     {
       std::string label;
       switch (resourceType) {
-        case ResourceType::File:      label = Strings::script_access_file_label(); break;
+        case ResourceType::File: {
+          if (mode == FileAccessMode::Write) {
+            label = Strings::script_access_file_write_label();
+          }
+          else {
+            label = Strings::script_access_file_label();
+          }
+          break;
+        }
         case ResourceType::Command:   label = Strings::script_access_command_label(); break;
         case ResourceType::WebSocket: label = Strings::script_access_websocket_label(); break;
         case ResourceType::Clipboard: label = Strings::script_access_clipboard_label(); break;

src/app/script/site_class.cpp

@@ -13,6 +13,8 @@
 #include "app/console.h"
 #include "app/context.h"
 #include "app/context_observer.h"
+#include "app/doc.h"
+#include "app/doc_undo.h"
 #include "app/script/docobj.h"
 #include "app/script/engine.h"
 #include "app/script/luacpp.h"

src/app/script/sprite_class.cpp

@@ -64,6 +64,7 @@
 #include "doc/tag.h"
 #include "doc/tileset.h"
 #include "doc/tilesets.h"
+#include "undo/undo_state.h"
 
 #include <algorithm>
 
@@ -456,7 +457,7 @@ int Sprite_newCel(lua_State* L)
   auto sprite = get_docobj<Sprite>(L, 1);
   auto layerBase = get_docobj<Layer>(L, 2);
   if (!layerBase->isImage())
-    return luaL_error(L, "unexpected kinf of layer in Sprite:newCel()");
+    return luaL_error(L, "unexpected kind of layer in Sprite:newCel()");
 
   frame_t frame = get_frame_number_from_arg(L, 3);
   if (frame < 0 || frame > sprite->lastFrame())
@@ -1029,6 +1030,42 @@ int Sprite_set_useLayerUuids(lua_State* L)
   return 0;
 }
 
+int Sprite_get_undoHistory(lua_State* L)
+{
+  const auto* sprite = get_docobj<Sprite>(L, 1);
+  const auto* doc = static_cast<Doc*>(sprite->document());
+  const auto* history = doc->undoHistory();
+
+  if (!history) {
+    lua_pushnil(L);
+    return 1;
+  }
+
+  const undo::UndoState* currentState = history->currentState();
+  const undo::UndoState* s = history->firstState();
+  const bool canRedo = history->canRedo();
+  bool pastCurrent = !currentState && canRedo;
+
+  int undoSteps = 0;
+  int redoSteps = 0;
+  while (s) {
+    if (pastCurrent && canRedo)
+      redoSteps++;
+    else if (currentState || !canRedo)
+      undoSteps++;
+
+    if (s == currentState || !currentState)
+      pastCurrent = true;
+
+    s = s->next();
+  }
+
+  lua_newtable(L);
+  setfield_integer(L, "undoSteps", undoSteps);
+  setfield_integer(L, "redoSteps", redoSteps);
+  return 1;
+}
+
 const luaL_Reg Sprite_methods[] = {
   { "__eq",              Sprite_eq                },
   { "resize",            Sprite_resize            },
@@ -1094,6 +1131,7 @@ const Property Sprite_properties[] = {
   { "events",               Sprite_get_events,               nullptr                         },
   { "tileManagementPlugin", Sprite_get_tileManagementPlugin, Sprite_set_tileManagementPlugin },
   { "useLayerUuids",        Sprite_get_useLayerUuids,        Sprite_set_useLayerUuids        },
+  { "undoHistory",          Sprite_get_undoHistory,          nullptr                         },
   { nullptr,                nullptr,                         nullptr                         }
 };
 

src/app/script/values.cpp

@@ -1,5 +1,5 @@
 // Aseprite
-// Copyright (C) 2019-2024  Igara Studio S.A.
+// Copyright (C) 2019-2025  Igara Studio S.A.
 //
 // This program is distributed under the terms of
 // the End-User License Agreement for Aseprite.

src/app/thumbnails.cpp

@@ -10,6 +10,7 @@
   #include "config.h"
 #endif
 
+#include "app/color_spaces.h"
 #include "app/util/conversion_to_surface.h"
 #include "doc/blend_mode.h"
 #include "doc/cel.h"
@@ -21,7 +22,8 @@
 
 namespace app { namespace thumb {
 
-os::SurfaceRef get_cel_thumbnail(const doc::Cel* cel,
+os::SurfaceRef get_cel_thumbnail(ui::Display* display,
+                                 const doc::Cel* cel,
                                  const bool scaleUpToFit,
                                  const gfx::Size& fitInSize)
 {
@@ -55,7 +57,8 @@ os::SurfaceRef get_cel_thumbnail(const doc::Cel* cel,
 
   if (os::SurfaceRef thumbnail = os::System::instance()->makeRgbaSurface(
         thumbnailImage->width(),
-        thumbnailImage->height())) {
+        thumbnailImage->height(),
+        get_current_color_space(display))) {
     convert_image_to_surface(thumbnailImage.get(),
                              palette,
                              thumbnail.get(),

src/app/thumbnails.h

@@ -11,6 +11,7 @@
 
 #include "gfx/size.h"
 #include "os/surface.h"
+#include "ui/display.h"
 
 namespace doc {
 class Cel;
@@ -22,7 +23,8 @@ class Surface;
 
 namespace app { namespace thumb {
 
-os::SurfaceRef get_cel_thumbnail(const doc::Cel* cel,
+os::SurfaceRef get_cel_thumbnail(ui::Display* display,
+                                 const doc::Cel* cel,
                                  const bool scaleUpToFit,
                                  const gfx::Size& fitInSize);
 

src/app/ui/app_menuitem.cpp

@@ -19,10 +19,10 @@
 #include "app/ui/keyboard_shortcuts.h"
 #include "app/ui_context.h"
 #include "os/menus.h"
-#include "ui/accelerator.h"
 #include "ui/menu.h"
 #include "ui/message.h"
 #include "ui/scale.h"
+#include "ui/shortcut.h"
 #include "ui/size_hint_event.h"
 #include "ui/widget.h"
 
@@ -139,8 +139,8 @@ void AppMenuItem::onSizeHint(SizeHintEvent& ev)
              border().width();
     size.h = textHeight() + border().height();
 
-    if (m_key && !m_key->accels().empty()) {
-      size.w += font()->textLength(m_key->accels().front().toString());
+    if (m_key && !m_key->shortcuts().empty()) {
+      size.w += font()->textLength(m_key->shortcuts().front().toString());
     }
   }
 

src/app/ui/brush_popup.cpp

@@ -431,8 +431,8 @@ void BrushPopup::regenerate(ui::Display* display, const gfx::Point& pos)
       params.set("change", "custom");
       params.set("slot", base::convert_to<std::string>(slot).c_str());
       KeyPtr key = KeyboardShortcuts::instance()->command(CommandId::ChangeBrush(), params);
-      if (key && !key->accels().empty())
-        shortcut = key->accels().front().toString();
+      if (key && !key->shortcuts().empty())
+        shortcut = key->shortcuts().front().toString();
     }
     m_customBrushes->addItem(new SelectBrushItem(brush, slot));
     m_customBrushes->addItem(new BrushShortcutItem(shortcut, slot));

src/app/ui/color_selector.cpp

@@ -1,5 +1,5 @@
 // Aseprite
-// Copyright (C) 2018-2024  Igara Studio S.A.
+// Copyright (C) 2018-2025  Igara Studio S.A.
 // Copyright (C) 2016-2018  David Capello
 //
 // This program is distributed under the terms of
@@ -107,11 +107,11 @@ public:
     }
   }
 
-  os::Surface* getCanvas(int w, int h, gfx::Color bgColor)
+  os::Surface* getCanvas(Display* display, int w, int h, gfx::Color bgColor)
   {
     assert_ui_thread();
 
-    auto activeCS = get_current_color_space();
+    auto activeCS = get_current_color_space(display);
 
     if (!m_canvas || m_canvas->width() != w || m_canvas->height() != h ||
         m_canvas->colorSpace() != activeCS) {
@@ -432,9 +432,9 @@ void ColorSelector::onPaint(ui::PaintEvent& ev)
     SkCanvas* canvas;
     bool isSRGB;
     // TODO compare both color spaces
-    if ((!get_current_color_space() || get_current_color_space()->isSRGB()) &&
-        (!g->getInternalSurface()->colorSpace() ||
-         g->getInternalSurface()->colorSpace()->isSRGB())) {
+    auto displayCs = get_current_color_space(display());
+    auto gCs = g->getInternalSurface()->colorSpace();
+    if ((!displayCs || displayCs->isSRGB()) && (!gCs || gCs->isSRGB())) {
       // We can render directly in the ui::Graphics surface
       canvas = &static_cast<os::SkiaSurface*>(g->getInternalSurface())->canvas();
       isSRGB = true;
@@ -442,7 +442,7 @@ void ColorSelector::onPaint(ui::PaintEvent& ev)
     else {
       // We'll paint in the ColorSelector::Painter canvas, and so we
       // can convert color spaces.
-      painterSurface = painter.getCanvas(rc.w, rc.h, theme->colors.workspace());
+      painterSurface = painter.getCanvas(display(), rc.w, rc.h, theme->colors.workspace());
       canvas = &static_cast<os::SkiaSurface*>(painterSurface)->canvas();
       isSRGB = false;
     }
@@ -497,7 +497,7 @@ void ColorSelector::onPaint(ui::PaintEvent& ev)
   else
 #endif // SK_ENABLE_SKSL
   {
-    painterSurface = painter.getCanvas(rc.w, rc.h, theme->colors.workspace());
+    painterSurface = painter.getCanvas(display(), rc.w, rc.h, theme->colors.workspace());
   }
 
   if (painterSurface)

src/app/ui/color_sliders.cpp

@@ -58,9 +58,7 @@ public:
       return;
     }
 
-    // Color space conversion
-    auto convertColor = convert_from_current_to_screen_color_space();
-
+    Paint paint;
     gfx::Color color = gfx::ColorNone;
     int w = std::max(rc.w - 1, 1);
 
@@ -110,7 +108,11 @@ public:
           color = color_utils::color_for_ui(app::Color::fromGray(255 * x / w));
           break;
       }
-      g->drawVLine(convertColor(color), rc.x + x, rc.y, rc.h);
+
+      // Color space conversion
+      paint.color(color, get_current_color_space(slider->display()).get());
+
+      g->drawVLine(rc.x + x, rc.y, rc.h, paint);
     }
   }
 

src/app/ui/color_wheel.cpp

@@ -1,5 +1,5 @@
 // Aseprite
-// Copyright (C) 2020-2022  Igara Studio S.A.
+// Copyright (C) 2020-2025  Igara Studio S.A.
 // Copyright (C) 2001-2018  David Capello
 //
 // This program is distributed under the terms of
@@ -11,6 +11,7 @@
 
 #include "app/ui/color_wheel.h"
 
+#include "app/color_spaces.h"
 #include "app/color_utils.h"
 #include "app/i18n/strings.h"
 #include "app/pref/preferences.h"
@@ -358,6 +359,9 @@ void ColorWheel::onPaintMainArea(ui::Graphics* g, const gfx::Rect& rc)
       int n = getHarmonies();
       int boxsize = std::min(rc.w / 10, rc.h / 10);
 
+      ui::Paint paint;
+      auto cs = get_current_color_space(g->display());
+
       for (int i = 0; i < n; ++i) {
         app::Color color = getColorInHarmony(i);
         double angle = color.getHsvHue() - 30.0;
@@ -374,9 +378,10 @@ void ColorWheel::onPaintMainArea(ui::Graphics* g, const gfx::Rect& rc)
 
         paintColorIndicator(g, pos, color.getHsvValue() < 0.5);
 
-        g->fillRect(
-          gfx::rgba(color.getRed(), color.getGreen(), color.getBlue(), 255),
-          gfx::Rect(rc.x + rc.w - (n - i) * boxsize, rc.y + rc.h - boxsize, boxsize, boxsize));
+        paint.color(gfx::rgba(color.getRed(), color.getGreen(), color.getBlue(), 255), cs.get());
+        g->drawRect(
+          gfx::Rect(rc.x + rc.w - (n - i) * boxsize, rc.y + rc.h - boxsize, boxsize, boxsize),
+          paint);
       }
     }
   }

src/app/ui/context_bar.cpp

@@ -1001,12 +1001,12 @@ public:
     m_angle.setSuffix("°");
     m_skew.setSuffix("°");
 
-    addChild(new Label("P:"));
+    addChild(new Label(Strings::context_bar_position_label()));
     addChild(&m_x);
     addChild(&m_y);
     addChild(&m_w);
     addChild(&m_h);
-    addChild(new Label("R:"));
+    addChild(new Label(Strings::context_bar_rotation_label()));
     addChild(&m_angle);
     addChild(&m_skew);
 
@@ -1047,6 +1047,16 @@ public:
     m_skew.Change.connect([this] { onChangeSkew(); });
   }
 
+  void setupTooltips(TooltipManager* tooltipManager)
+  {
+    tooltipManager->addTooltipFor(&m_x, Strings::context_bar_position_x(), BOTTOM);
+    tooltipManager->addTooltipFor(&m_y, Strings::context_bar_position_y(), BOTTOM);
+    tooltipManager->addTooltipFor(&m_w, Strings::context_bar_size_width(), BOTTOM);
+    tooltipManager->addTooltipFor(&m_h, Strings::context_bar_size_height(), BOTTOM);
+    tooltipManager->addTooltipFor(&m_angle, Strings::context_bar_rotation_angle(), BOTTOM);
+    tooltipManager->addTooltipFor(&m_skew, Strings::context_bar_rotation_skew(), BOTTOM);
+  }
+
   void update(const Transformation& t)
   {
     auto rc = t.bounds();
@@ -1380,11 +1390,12 @@ public:
 
 class ContextBar::DropPixelsField : public ButtonSet {
 public:
-  DropPixelsField() : ButtonSet(2)
+  DropPixelsField() : ButtonSet(3)
   {
     auto* theme = SkinTheme::get(this);
 
     addItem(theme->parts.dropPixelsOk(), theme->styles.contextBarButton());
+    addItem(theme->parts.dropPixelsDrop(), theme->styles.contextBarButton());
     addItem(theme->parts.dropPixelsCancel(), theme->styles.contextBarButton());
     setOfferCapture(false);
   }
@@ -1392,8 +1403,26 @@ public:
   void setupTooltips(TooltipManager* tooltipManager)
   {
     // TODO Enter and Esc should be configurable keys
-    tooltipManager->addTooltipFor(at(0), Strings::context_bar_drop_pixel(), BOTTOM);
-    tooltipManager->addTooltipFor(at(1), Strings::context_bar_cancel_drag(), BOTTOM);
+
+    tooltipManager->addTooltipFor(
+      at(0),
+      key_tooltip(Strings::context_bar_drop_pixel_and_deselect().c_str(),
+                  CommandId::DeselectMask(),
+                  {},
+                  KeyContext::Transformation),
+      BOTTOM);
+    tooltipManager->addTooltipFor(at(1),
+                                  key_tooltip(Strings::context_bar_drop_pixel().c_str(),
+                                              CommandId::Apply(),
+                                              {},
+                                              KeyContext::Transformation),
+                                  BOTTOM);
+    tooltipManager->addTooltipFor(at(2),
+                                  key_tooltip(Strings::context_bar_cancel_drag().c_str(),
+                                              CommandId::Undo(),
+                                              {},
+                                              KeyContext::Transformation),
+                                  BOTTOM);
   }
 
   obs::signal<void(ContextBarObserver::DropAction)> DropPixels;
@@ -1404,8 +1433,9 @@ protected:
     ButtonSet::onItemChange(item);
 
     switch (selectedItem()) {
-      case 0: DropPixels(ContextBarObserver::DropPixels); break;
-      case 1: DropPixels(ContextBarObserver::CancelDrag); break;
+      case 0: DropPixels(ContextBarObserver::Deselect); break;
+      case 1: DropPixels(ContextBarObserver::DropPixels); break;
+      case 2: DropPixels(ContextBarObserver::CancelDrag); break;
     }
   }
 };
@@ -1857,7 +1887,7 @@ private:
 
 class ContextBar::FontSelector : public FontEntry {
 public:
-  FontSelector(ContextBar* contextBar)
+  FontSelector(ContextBar* contextBar) : FontEntry(true) // With stroke and fill options
   {
     // Load the font from the preferences
     setInfo(FontInfo::getFromPreferences(), FontEntry::From::Init);
@@ -2559,6 +2589,11 @@ FontInfo ContextBar::fontInfo() const
   return m_fontSelector->info();
 }
 
+FontEntry* ContextBar::fontEntry()
+{
+  return m_fontSelector;
+}
+
 render::DitheringMatrix ContextBar::ditheringMatrix()
 {
   return m_ditheringSelector->ditheringMatrix();
@@ -2621,6 +2656,7 @@ void ContextBar::setupTooltips(TooltipManager* tooltipManager)
   m_dropPixels->setupTooltips(tooltipManager);
   m_symmetry->setupTooltips(tooltipManager);
   m_sliceFields->setupTooltips(tooltipManager);
+  m_transformation->setupTooltips(tooltipManager);
 }
 
 void ContextBar::registerCommands()

src/app/ui/context_bar.h

@@ -1,5 +1,5 @@
 // Aseprite
-// Copyright (C) 2018-2024  Igara Studio S.A.
+// Copyright (C) 2018-2025  Igara Studio S.A.
 // Copyright (C) 2001-2017  David Capello
 //
 // This program is distributed under the terms of
@@ -90,6 +90,7 @@ public:
 
   // For text tool
   FontInfo fontInfo() const;
+  FontEntry* fontEntry();
 
   // For gradients
   render::DitheringMatrix ditheringMatrix();

src/app/ui/context_bar_observer.h

@@ -1,4 +1,5 @@
 // Aseprite
+// Copyright (C) 2025  Igara Studio S.A.
 // Copyright (C) 2001-2015  David Capello
 //
 // This program is distributed under the terms of
@@ -12,7 +13,7 @@ namespace app {
 
 class ContextBarObserver {
 public:
-  enum DropAction { DropPixels, CancelDrag };
+  enum DropAction { Deselect, DropPixels, CancelDrag };
 
   virtual ~ContextBarObserver() {}
   virtual void onDropPixels(DropAction action) {}

src/app/ui/dithering_selector.cpp

@@ -180,6 +180,7 @@ DitheringSelector::DitheringSelector(Type type) : m_type(type)
   m_extChanges = extensions.DitheringMatricesChange.connect([this] { regenerate(); });
 
   setUseCustomWidget(true);
+  regenerate();
 }
 
 void DitheringSelector::onInitTheme(ui::InitThemeEvent& ev)
@@ -189,16 +190,6 @@ void DitheringSelector::onInitTheme(ui::InitThemeEvent& ev)
     setSizeHint(calcItemSizeHint(0));
 }
 
-void DitheringSelector::onVisible(bool visible)
-{
-  if (visible && !m_initialized) {
-    // Only do the expensive regeneration when we're set as visible for the first time.
-    regenerate();
-    m_initialized = true;
-  }
-  ComboBox::onVisible(visible);
-}
-
 void DitheringSelector::setSelectedItemByName(const std::string& name)
 {
   int index = findItemIndex(name);

src/app/ui/dithering_selector.h

@@ -31,7 +31,6 @@ public:
 
 protected:
   void onInitTheme(ui::InitThemeEvent& ev) override;
-  void onVisible(bool visible) override;
 
 private:
   void regenerate(int selectedItemIndex = 0);
@@ -39,7 +38,6 @@ private:
 
   Type m_type;
   obs::scoped_connection m_extChanges;
-  bool m_initialized = false;
 };
 
 } // namespace app

src/app/ui/doc_view.cpp

@@ -1,5 +1,5 @@
 // Aseprite
-// Copyright (C) 2018-2024  Igara Studio S.A.
+// Copyright (C) 2018-2025  Igara Studio S.A.
 // Copyright (C) 2001-2018  David Capello
 //
 // This program is distributed under the terms of
@@ -36,15 +36,18 @@
 #include "app/ui/workspace.h"
 #include "app/ui_context.h"
 #include "app/util/clipboard.h"
+#include "app/util/slice_utils.h"
 #include "base/fs.h"
 #include "doc/color.h"
 #include "doc/layer.h"
+#include "doc/slice.h"
 #include "doc/sprite.h"
 #include "fmt/format.h"
-#include "ui/accelerator.h"
 #include "ui/alert.h"
+#include "ui/display.h"
 #include "ui/menu.h"
 #include "ui/message.h"
+#include "ui/shortcut.h"
 #include "ui/system.h"
 #include "ui/view.h"
 
@@ -147,11 +150,11 @@ protected:
           KeyPtr rmb = keys->action(KeyAction::RightMouseButton, KeyContext::Any);
 
           // Convert action keys into mouse messages.
-          if (lmb->isPressed(msg, *keys) || rmb->isPressed(msg, *keys)) {
+          if (lmb->isPressed(msg) || rmb->isPressed(msg)) {
             MouseMessage mouseMsg(
               (msg->type() == kKeyDownMessage ? kMouseDownMessage : kMouseUpMessage),
               PointerType::Unknown,
-              (lmb->isPressed(msg, *keys) ? kButtonLeft : kButtonRight),
+              (lmb->isPressed(msg) ? kButtonLeft : kButtonRight),
               msg->modifiers(),
               mousePosInDisplay());
 
@@ -306,6 +309,11 @@ bool DocView::onCloseView(Workspace* workspace, bool quitting)
 
     // See if the sprite has changes
     while (m_document->isModified()) {
+      if (quitting) {
+        // Make sure the window is active so we can see the message when we close the app.
+        display()->nativeWindow()->activate();
+      }
+
       // ask what want to do the user with the changes in the sprite
       int ret = Alert::show(Strings::alerts_save_sprite_changes(
         m_document->name(),
@@ -510,6 +518,8 @@ bool DocView::onCanCopy(Context* ctx)
     return true;
   else if (m_editor->isMovingPixels())
     return true;
+  else if (m_editor->hasSelectedSlices())
+    return true;
   else
     return false;
 }
@@ -528,6 +538,11 @@ bool DocView::onCanPaste(Context* ctx)
       return true;
     }
   }
+
+  if (ctx->checkFlags(ContextFlags::ActiveDocumentIsWritable) &&
+      ctx->clipboard()->format() == ClipboardFormat::Slices) {
+    return true;
+  }
   return false;
 }
 
@@ -560,15 +575,22 @@ bool DocView::onCopy(Context* ctx)
     ctx->clipboard()->copy(reader);
     return true;
   }
-  else
-    return false;
+
+  std::vector<Slice*> selectedSlices = get_selected_slices(reader.site());
+  if (!selectedSlices.empty()) {
+    ctx->clipboard()->copySlices(selectedSlices);
+    return true;
+  }
+
+  return false;
 }
 
 bool DocView::onPaste(Context* ctx, const gfx::Point* position)
 {
   auto clipboard = ctx->clipboard();
   if (clipboard->format() == ClipboardFormat::Image ||
-      clipboard->format() == ClipboardFormat::Tilemap) {
+      clipboard->format() == ClipboardFormat::Tilemap ||
+      clipboard->format() == ClipboardFormat::Slices) {
     clipboard->paste(ctx, true, position);
     return true;
   }

src/app/ui/editor/brush_preview.cpp

@@ -1,5 +1,5 @@
 // Aseprite
-// Copyright (C) 2019-2024  Igara Studio S.A.
+// Copyright (C) 2019-2025  Igara Studio S.A.
 // Copyright (C) 2001-2018  David Capello
 //
 // This program is distributed under the terms of
@@ -457,6 +457,8 @@ void BrushPreview::show(const gfx::Point& screenPos)
 
       // Here we re-use the cached surface
       if (!cached && m_uiLayer->surface()) {
+        m_uiLayer->surface()->clear();
+
         gfx::Rect layerBounds = m_uiLayer->surface()->bounds();
         ui::Graphics g(display, m_uiLayer->surface(), 0, 0);