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[D3D12] Round to nearest when converting to fixed-point

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Triang3l
2018-10-26 22:04:11 +03:00
parent f4844207ad
commit 1d45a4f67e
5 changed files with 158 additions and 125 deletions
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4
src/xenia/gpu/d3d12/shaders/pixel_formats.hlsli
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@@ -18,8 +18,10 @@ uint XeFloat16To7e3(uint4 rgba_f16u32) {
(rgb_f32u32 < 0x3E800000u) ? denormalized : (rgb_f32u32 + 0xC2000000u);
rgb_f10u32 =
((rgb_f10u32 + 0x7FFFu + ((rgb_f10u32 >> 16u) & 1u)) >> 16u) & 0x3FFu;
// Rounding alpha to the nearest integer.
// https://docs.microsoft.com/en-us/windows/desktop/direct3d10/d3d10-graphics-programming-guide-resources-data-conversion
return rgb_f10u32.r | (rgb_f10u32.g << 10u) | (rgb_f10u32.b << 20u) |
(uint(saturate(rgba_f32.a) * 3.0) << 30u);
(uint(round(saturate(rgba_f32.a) * 3.0)) << 30u);
}
uint4 XeFloat7e3To16(uint rgba_packed) {