mirror of https://github.com/aseprite/aseprite.git
56 lines
1.3 KiB
C++
56 lines
1.3 KiB
C++
|
// Aseprite Render Library
|
||
|
|
// Copyright (c) 2017 David Capello
|
||
|
|
//
|
||
|
|
// This file is released under the terms of the MIT license.
|
||
|
|
// Read LICENSE.txt for more information.
|
||
|
|
|
||
|
|
#ifdef HAVE_CONFIG_H
|
||
|
|
#include "config.h"
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#include "render/ordered_dither.h"
|
||
|
|
|
||
|
|
namespace render {
|
||
|
|
|
||
|
|
// Base 2x2 dither matrix, called D(2):
|
||
|
|
int BayerMatrix::D2[4] = { 0, 2,
|
||
|
|
3, 1 };
|
||
|
|
|
||
|
|
void dither_rgb_image_to_indexed(
|
||
|
|
DitheringAlgorithmBase& algorithm,
|
||
|
|
const DitheringMatrix& matrix,
|
||
|
|
const doc::Image* srcImage,
|
||
|
|
doc::Image* dstImage,
|
||
|
|
int u, int v,
|
||
|
|
const doc::RgbMap* rgbmap,
|
||
|
|
const doc::Palette* palette,
|
||
|
|
TaskDelegate* delegate)
|
||
|
|
{
|
||
|
|
const doc::LockImageBits<doc::RgbTraits> srcBits(srcImage);
|
||
|
|
doc::LockImageBits<doc::IndexedTraits> dstBits(dstImage);
|
||
|
|
auto srcIt = srcBits.begin();
|
||
|
|
auto dstIt = dstBits.begin();
|
||
|
|
int w = srcImage->width();
|
||
|
|
int h = srcImage->height();
|
||
|
|
|
||
|
|
for (int y=0; y<h; ++y) {
|
||
|
|
for (int x=0; x<w; ++x, ++srcIt, ++dstIt) {
|
||
|
|
ASSERT(srcIt != srcBits.end());
|
||
|
|
ASSERT(dstIt != dstBits.end());
|
||
|
|
*dstIt = algorithm.ditherRgbPixelToIndex(matrix, *srcIt, x+u, y+v, rgbmap, palette);
|
||
|
|
|
||
|
|
if (delegate) {
|
||
|
|
if (!delegate->continueTask())
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (delegate) {
|
||
|
|
delegate->notifyTaskProgress(
|
||
|
|
double(y+1) / double(h));
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
} // namespace render
|