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sw_engine: grayscale image support++

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Mira Grudzinska 2024-07-12 01:11:02 +02:00 • committed by Hermet Park
parent 1131695ce4
commit d0210a1a72
1 changed files with 34 additions and 18 deletions
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52
src/renderer/sw_engine/tvgSwRaster.cpp
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@ -1389,29 +1389,45 @@ static bool _rasterDirectBlendingImage(SwSurface* surface, const SwImage* image,
static bool _rasterDirectImage(SwSurface* surface, const SwImage* image, const SwBBox& region, uint8_t opacity)
{
if (surface->channelSize == sizeof(uint8_t)) {
TVGERR("SW_ENGINE", "Not supported grayscale image!");
return false;
}
auto dbuffer = &surface->buf32[region.min.y * surface->stride + region.min.x];
auto sbuffer = image->buf32 + (region.min.y + image->oy) * image->stride + (region.min.x + image->ox);
for (auto y = region.min.y; y < region.max.y; ++y) {
auto dst = dbuffer;
auto src = sbuffer;
if (opacity == 255) {
for (auto x = region.min.x; x < region.max.x; x++, dst++, src++) {
*dst = *src + ALPHA_BLEND(*dst, IA(*src));
//32bits channels
if (surface->channelSize == sizeof(uint32_t)) {
auto dbuffer = &surface->buf32[region.min.y * surface->stride + region.min.x];
for (auto y = region.min.y; y < region.max.y; ++y) {
auto dst = dbuffer;
auto src = sbuffer;
if (opacity == 255) {
for (auto x = region.min.x; x < region.max.x; x++, dst++, src++) {
*dst = *src + ALPHA_BLEND(*dst, IA(*src));
}
} else {
for (auto x = region.min.x; x < region.max.x; ++x, ++dst, ++src) {
auto tmp = ALPHA_BLEND(*src, opacity);
*dst = tmp + ALPHA_BLEND(*dst, IA(tmp));
}
}
} else {
for (auto x = region.min.x; x < region.max.x; ++x, ++dst, ++src) {
auto tmp = ALPHA_BLEND(*src, opacity);
*dst = tmp + ALPHA_BLEND(*dst, IA(tmp));
dbuffer += surface->stride;
sbuffer += image->stride;
}
//8bits grayscale
} else if (surface->channelSize == sizeof(uint8_t)) {
auto dbuffer = &surface->buf8[region.min.y * surface->stride + region.min.x];
for (auto y = region.min.y; y < region.max.y; ++y, dbuffer += surface->stride, sbuffer += image->stride) {
auto dst = dbuffer;
auto src = sbuffer;
if (opacity == 255) {
for (auto x = region.min.x; x < region.max.x; ++x, ++dst, ++src) {
*dst = *src + MULTIPLY(*dst, ~*src);
}
} else {
for (auto x = region.min.x; x < region.max.x; ++x, ++dst, ++src) {
*dst = INTERPOLATE8(*src, *dst, opacity);
}
}
}
dbuffer += surface->stride;
sbuffer += image->stride;
}
return true;
}