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8255149: Lanai: DrawImage/ failure #121

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@@ -102,6 +102,7 @@ struct TxtFrameUniforms {
vector_float4 color;
int mode; // NOTE: consider to use bit fields
int isSrcOpaque;
int isSrcPremult;
int isDstOpaque;
float extraAlpha;
@@ -177,6 +177,10 @@ fragment half4 frag_txt(
return half4(c.r, c.g, c.b , c.a);

if (uniforms.isSrcPremult) {
pixelColor.rgb /= srcA;

return half4(pixelColor.r,
pixelColor.b, srcA)*uniforms.extraAlpha;
@@ -858,7 +858,9 @@ static void setTxtUniforms(
id<MTLRenderCommandEncoder> encoder, int color, int mode, int interpolation, bool repeat, jfloat extraAlpha,
const SurfaceRasterFlags * srcFlags, const SurfaceRasterFlags * dstFlags
) {
struct TxtFrameUniforms uf = {RGBA_TO_V4(color), mode, srcFlags->isOpaque, dstFlags->isOpaque, extraAlpha};
struct TxtFrameUniforms uf = {
RGBA_TO_V4(color), mode, srcFlags->isOpaque, srcFlags->isPremultiplied,
dstFlags->isOpaque, extraAlpha};
[encoder setFragmentBytes:&uf length:sizeof(uf) atIndex:FrameUniformBuffer];

setSampler(encoder, interpolation, repeat);