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Add support to cel/layer opacity + some blend modes

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This commit is contained in:
David Capello 2022-09-19 10:56:47 -03:00
parent f621472b7c
commit 3c099dc4dc
1 changed files with 42 additions and 12 deletions
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54
src/app/render/shader_renderer.cpp
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@ -21,7 +21,9 @@
namespace app {
static const char* kBgShaderCode = R"(
namespace {
const char* kBgShaderCode = R"(
uniform half3 iRes, iCanvas, iSrcPos;
uniform half4 iBg1, iBg2;
uniform half2 iStripeSize;
@ -32,6 +34,33 @@ half4 main(vec2 fragcoord) {
}
)";
inline SkBlendMode to_skia(const doc::BlendMode bm) {
switch (bm) {
case doc::BlendMode::NORMAL: return SkBlendMode::kSrcOver;
case doc::BlendMode::MULTIPLY: return SkBlendMode::kMultiply;
case doc::BlendMode::SCREEN: return SkBlendMode::kScreen;
case doc::BlendMode::OVERLAY: return SkBlendMode::kOverlay;
case doc::BlendMode::DARKEN: return SkBlendMode::kDarken;
case doc::BlendMode::LIGHTEN: return SkBlendMode::kLighten;
case doc::BlendMode::COLOR_DODGE: return SkBlendMode::kColorDodge;
case doc::BlendMode::COLOR_BURN: return SkBlendMode::kColorBurn;
case doc::BlendMode::HARD_LIGHT: return SkBlendMode::kHardLight;
case doc::BlendMode::SOFT_LIGHT: return SkBlendMode::kSoftLight;
case doc::BlendMode::DIFFERENCE: return SkBlendMode::kDifference;
case doc::BlendMode::EXCLUSION: return SkBlendMode::kExclusion;
case doc::BlendMode::HSL_HUE: return SkBlendMode::kHue;
case doc::BlendMode::HSL_SATURATION: return SkBlendMode::kSaturation;
case doc::BlendMode::HSL_COLOR: return SkBlendMode::kColor;
case doc::BlendMode::HSL_LUMINOSITY: return SkBlendMode::kLuminosity;
case doc::BlendMode::ADDITION: return SkBlendMode::kPlus;
case doc::BlendMode::SUBTRACT: break; // TODO
case doc::BlendMode::DIVIDE: break; // TODO
}
return SkBlendMode::kSrc;
}
} // anonymous namespace
ShaderRenderer::ShaderRenderer()
{
auto result = SkRuntimeEffect::MakeForShader(SkString(kBgShaderCode));
@ -168,9 +197,9 @@ void ShaderRenderer::drawLayerGroup(SkCanvas* canvas,
switch (layer->type()) {
case doc::ObjectType::LayerImage: {
auto imageLayer = static_cast<const LayerImage*>(layer);
auto imgLayer = static_cast<const LayerImage*>(layer);
if (doc::Cel* cel = imageLayer->cel(frame)) {
if (doc::Cel* cel = imgLayer->cel(frame)) {
doc::Image* image = cel->image();
auto skData = SkData::MakeWithoutCopy(
@ -188,17 +217,18 @@ void ShaderRenderer::drawLayerGroup(SkCanvas* canvas,
skData,
image->getRowStrideSize());
sk_sp<SkShader> imgShader = skImg->makeShader(SkSamplingOptions(SkFilterMode::kLinear));
int t;
int opacity = cel->opacity();
opacity = MUL_UN8(opacity, imgLayer->opacity(), t);
SkPaint p;
p.setStyle(SkPaint::kFill_Style);
p.setShader(imgShader);
canvas->save();
canvas->translate(SkIntToScalar(area.dst.x + cel->x() - area.src.x),
SkIntToScalar(area.dst.y + cel->y() - area.src.y));
canvas->drawRect(SkRect::MakeXYWH(0, 0, image->width(), image->height()), p);
canvas->restore();
p.setAlpha(opacity);
p.setBlendMode(to_skia(imgLayer->blendMode()));
canvas->drawImage(skImg.get(),
SkIntToScalar(area.dst.x + cel->x() - area.src.x),
SkIntToScalar(area.dst.y + cel->y() - area.src.y),
SkSamplingOptions(),
&p);
}
break;
}