/* YUV-to-RGBA Effect
* Written by Ethan "flibitijibibo" Lee
*
* This effect is based on the YUV-to-RGBA GLSL shader found in SDL.
* Thus, it also released under the zlib license:
*/
sampler samp0 : register(s0);
sampler samp1 : register(s1);
sampler samp2 : register(s2);
void VS(inout float2 tex : TEXCOORD0,
inout float4 pos : SV_Position)
{
pos.w = 1.0;
}
float4 PS(float2 tex : TEXCOORD0) : SV_Target0
{
const float3 offset = float3(-0.0625, -0.5, -0.5);
const float3 Rcoeff = float3(1.164, 0.000, 1.596);
const float3 Gcoeff = float3(1.164, -0.391, -0.813);
const float3 Bcoeff = float3(1.164, 2.018, 0.000);
float3 yuv;
yuv.x = tex2D(samp0, tex).x;
yuv.y = tex2D(samp1, tex).x;
yuv.z = tex2D(samp2, tex).x;
yuv += offset;
float4 rgba;
rgba.x = dot(yuv, Rcoeff);
rgba.y = dot(yuv, Gcoeff);
rgba.z = dot(yuv, Bcoeff);
rgba.w = 1.0;
return rgba;
}
Technique T
{
Pass P
{
VertexShader = compile vs_3_0 VS();
PixelShader = compile ps_3_0 PS();
}
}
