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ENH: add anti-Aliasing when generating small thumbnail

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JIRA: STUDIO-4374

Change-Id: I9bd9cadd1b3b226d1679a00d5a129c4ed9cb1828
Signed-off-by: Stone Li <stone.li@bambulab.com>
This commit is contained in:
Stone Li 2023-09-11 16:41:33 +08:00 committed by Lane.Wei
parent f968c152c2
commit dcf3e736fe
1 changed files with 20 additions and 3 deletions
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23
src/libslic3r/Format/bbs_3mf.cpp
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@ -5878,9 +5878,26 @@ void PlateData::parse_filament_info(GCodeProcessorResult *result)
/* step width and step height */
int sw = thumbnail_data.width / PLATE_THUMBNAIL_SMALL_WIDTH;
int sh = thumbnail_data.height / PLATE_THUMBNAIL_SMALL_HEIGHT;
for (int i = 0; i < thumbnail_data.width; i += sw) {
for (int j = 0; j < thumbnail_data.height; j += sh) {
memcpy((void*)&small_pixels[4*(i / sw * PLATE_THUMBNAIL_SMALL_WIDTH + j / sh)], thumbnail_data.pixels.data() + 4*(i * thumbnail_data.width + j), 4);
for (int i = 0; i < thumbnail_data.height; i += sh) {
for (int j = 0; j < thumbnail_data.width; j += sw) {
int r = 0, g = 0, b = 0, a = 0;
for (int m = 0; m < sh; m++) {
for (int n = 0; n < sw; n++) {
r += (int)thumbnail_data.pixels[4 * ((i + m) * thumbnail_data.width + j + n) + 0];
g += (int)thumbnail_data.pixels[4 * ((i + m) * thumbnail_data.width + j + n) + 1];
b += (int)thumbnail_data.pixels[4 * ((i + m) * thumbnail_data.width + j + n) + 2];
a += (int)thumbnail_data.pixels[4 * ((i + m) * thumbnail_data.width + j + n) + 3];
}
}
r = std::clamp(0, r / sw / sh, 255);
g = std::clamp(0, g / sw / sh, 255);
b = std::clamp(0, b / sw / sh, 255);
a = std::clamp(0, a / sw / sh, 255);
small_pixels[4 * (i / sw * PLATE_THUMBNAIL_SMALL_WIDTH + j / sh) + 0] = (unsigned char)r;
small_pixels[4 * (i / sw * PLATE_THUMBNAIL_SMALL_WIDTH + j / sh) + 1] = (unsigned char)g;
small_pixels[4 * (i / sw * PLATE_THUMBNAIL_SMALL_WIDTH + j / sh) + 2] = (unsigned char)b;
small_pixels[4 * (i / sw * PLATE_THUMBNAIL_SMALL_WIDTH + j / sh) + 3] = (unsigned char)a;
//memcpy((void*)&small_pixels[4*(i / sw * PLATE_THUMBNAIL_SMALL_WIDTH + j / sh)], thumbnail_data.pixels.data() + 4*(i * thumbnail_data.width + j), 4);
}
}
size_t small_png_size = 0;