mirror of https://github.com/aseprite/aseprite.git
85 lines
3.0 KiB
C++
85 lines
3.0 KiB
C++
// Aseprite Document Library
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// Copyright (c) 2024 Igara Studio S.A.
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//
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// This file is released under the terms of the MIT license.
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// Read LICENSE.txt for more information.
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "doc/blend_image.h"
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#include "doc/blend_internals.h"
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#include "doc/image_impl.h"
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namespace doc {
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template<typename DstTraits,
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typename SrcTraits>
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void blend_image_templ(Image* dst,
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const Image* src,
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const gfx::Clip& area,
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const Palette* pal,
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const int opacity,
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const BlendMode blendMode)
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{
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if constexpr (DstTraits::color_mode == ColorMode::INDEXED ||
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SrcTraits::color_mode == ColorMode::INDEXED) {
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ASSERT(pal != nullptr);
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if (pal == nullptr)
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return;
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}
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BlenderHelper<DstTraits, SrcTraits> blender(dst, src, pal, blendMode, true);
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LockImageBits<DstTraits> dstBits(dst);
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const LockImageBits<SrcTraits> srcBits(src);
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auto dstIt = dstBits.begin_area(area.dstBounds());
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auto srcIt = srcBits.begin_area(area.srcBounds());
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auto dstEnd = dstBits.end_area(area.dstBounds());
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for (; dstIt < dstEnd; ++dstIt, ++srcIt)
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*dstIt = blender(*dstIt, *srcIt, opacity);
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}
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void blend_image(Image* dst,
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const Image* src,
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gfx::Clip area,
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const Palette* pal,
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const int opacity,
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const BlendMode blendMode)
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{
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if (!area.clip(dst->width(), dst->height(), src->width(), src->height()))
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return;
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switch (dst->pixelFormat()) {
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case IMAGE_RGB:
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switch (src->pixelFormat()) {
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case IMAGE_RGB: return blend_image_templ<RgbTraits, RgbTraits >(dst, src, area, pal, opacity, blendMode);
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case IMAGE_GRAYSCALE: return blend_image_templ<RgbTraits, GrayscaleTraits>(dst, src, area, pal, opacity, blendMode);
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case IMAGE_INDEXED: return blend_image_templ<RgbTraits, IndexedTraits >(dst, src, area, pal, opacity, blendMode);
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}
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break;
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case IMAGE_GRAYSCALE:
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switch (src->pixelFormat()) {
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case IMAGE_RGB: return blend_image_templ<GrayscaleTraits, RgbTraits >(dst, src, area, pal, opacity, blendMode);
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case IMAGE_GRAYSCALE: return blend_image_templ<GrayscaleTraits, GrayscaleTraits>(dst, src, area, pal, opacity, blendMode);
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case IMAGE_INDEXED: return blend_image_templ<GrayscaleTraits, IndexedTraits >(dst, src, area, pal, opacity, blendMode);
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}
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break;
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case IMAGE_INDEXED:
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switch (src->pixelFormat()) {
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case IMAGE_RGB: return blend_image_templ<IndexedTraits, RgbTraits >(dst, src, area, pal, opacity, blendMode);
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case IMAGE_GRAYSCALE: return blend_image_templ<IndexedTraits, GrayscaleTraits>(dst, src, area, pal, opacity, blendMode);
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case IMAGE_INDEXED: return blend_image_templ<IndexedTraits, IndexedTraits >(dst, src, area, pal, opacity, blendMode);
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}
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break;
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case IMAGE_TILEMAP:
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return dst->copy(src, area);
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}
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}
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} // namespace doc
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