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swiftshader
Commit 13c70cda by Nicolas Capens
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Fix scaling of float color to RGB565.

The scaling factors ensure that the components are rounded correctly even after alpha blending, which may multiply colors by colors. Bug 24332884 Change-Id: Ib75602e89996b2fd1a319a132a681295fb2a18a6 Reviewed-on: https://swiftshader-review.googlesource.com/5048Tested-by: 's avatarNicolas Capens <capn@google.com> Reviewed-by: 's avatarNicolas Capens <capn@google.com>
parent 53463f75
Showing with 14 additions and 4 deletions
src/Shader/PixelProgram.cpp
......@@ -584,10 +584,20 @@ namespace sw
Pointer<Byte> buffer = cBuffer[index] + q * *Pointer<Int>(data + OFFSET(DrawData, colorSliceB[index]));
Vector4s color;
color.x = convertFixed16(c[index].x, false);
color.y = convertFixed16(c[index].y, false);
color.z = convertFixed16(c[index].z, false);
color.w = convertFixed16(c[index].w, false);
if(state.targetFormat[index] == FORMAT_R5G6B5)
{
color.x = UShort4(c[index].x * Float4(0xFBFF), false);
color.y = UShort4(c[index].y * Float4(0xFDFF), false);
color.z = UShort4(c[index].z * Float4(0xFBFF), false);
color.w = UShort4(c[index].w * Float4(0xFFFF), false);
}
else
{
color.x = convertFixed16(c[index].x, false);
color.y = convertFixed16(c[index].y, false);
color.z = convertFixed16(c[index].z, false);
color.w = convertFixed16(c[index].w, false);
}
if(state.multiSampleMask & (1 << q))
{
......
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