Merge commit '852f2a6343518919e5ca8d3c1bbcab9f493e3cd8'

external/sdl/SDL/VisualC-GDK/shaders/D3D12_PixelShader_YUV_JPEG.hlsl

@@ -0,0 +1,46 @@
+Texture2D theTextureY : register(t0);
+Texture2D theTextureU : register(t1);
+Texture2D theTextureV : register(t2);
+SamplerState theSampler : register(s0);
+
+struct PixelShaderInput
+{
+    float4 pos : SV_POSITION;
+    float2 tex : TEXCOORD0;
+    float4 color : COLOR0;
+};
+
+#define YUVRS \
+    "RootFlags ( ALLOW_INPUT_ASSEMBLER_INPUT_LAYOUT |" \
+    "            DENY_DOMAIN_SHADER_ROOT_ACCESS |" \
+    "            DENY_GEOMETRY_SHADER_ROOT_ACCESS |" \
+    "            DENY_HULL_SHADER_ROOT_ACCESS )," \
+    "RootConstants(num32BitConstants=32, b0),"\
+    "DescriptorTable ( SRV(t0), visibility = SHADER_VISIBILITY_PIXEL ),"\
+    "DescriptorTable ( SRV(t1), visibility = SHADER_VISIBILITY_PIXEL ),"\
+    "DescriptorTable ( SRV(t2), visibility = SHADER_VISIBILITY_PIXEL ),"\
+    "DescriptorTable ( Sampler(s0), visibility = SHADER_VISIBILITY_PIXEL )"
+
+[RootSignature(YUVRS)]
+float4 main(PixelShaderInput input) : SV_TARGET
+{
+    const float3 offset = {0.0, -0.501960814, -0.501960814};
+    const float3 Rcoeff = {1.0000,  0.0000,  1.4020};
+    const float3 Gcoeff = {1.0000, -0.3441, -0.7141};
+    const float3 Bcoeff = {1.0000,  1.7720,  0.0000};
+
+    float4 Output;
+
+    float3 yuv;
+    yuv.x = theTextureY.Sample(theSampler, input.tex).r;
+    yuv.y = theTextureU.Sample(theSampler, input.tex).r;
+    yuv.z = theTextureV.Sample(theSampler, input.tex).r;
+
+    yuv += offset;
+    Output.r = dot(yuv, Rcoeff);
+    Output.g = dot(yuv, Gcoeff);
+    Output.b = dot(yuv, Bcoeff);
+    Output.a = 1.0f;
+
+    return Output * input.color;
+}