Merge commit '852f2a6343518919e5ca8d3c1bbcab9f493e3cd8'

external/sdl/SDL/VisualC-GDK/shaders/D3D12_PixelShader_NV12_BT709.hlsl

@@ -0,0 +1,43 @@
+Texture2D theTextureY : register(t0);
+Texture2D theTextureUV : register(t1);
+SamplerState theSampler : register(s0);
+
+struct PixelShaderInput
+{
+    float4 pos : SV_POSITION;
+    float2 tex : TEXCOORD0;
+    float4 color : COLOR0;
+};
+
+#define NVRS \
+    "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 ( Sampler(s0), visibility = SHADER_VISIBILITY_PIXEL )"
+
+[RootSignature(NVRS)]
+float4 main(PixelShaderInput input) : SV_TARGET
+{
+    const float3 offset = {-0.0627451017, -0.501960814, -0.501960814};
+    const float3 Rcoeff = {1.1644,  0.0000,  1.7927};
+    const float3 Gcoeff = {1.1644, -0.2132, -0.5329};
+    const float3 Bcoeff = {1.1644,  2.1124,  0.0000};
+
+    float4 Output;
+
+    float3 yuv;
+    yuv.x = theTextureY.Sample(theSampler, input.tex).r;
+    yuv.yz = theTextureUV.Sample(theSampler, input.tex).rg;
+
+    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;
+}