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Location: alysbrooks-public/games/isometric-park-fna/FNA/src/Graphics/Effect/YUVToRGBA/YUVToRGBAEffect.fx

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Commit Description:
Update TODO.taskpaper with performance things and some other issues I've previously forgotten to note.
Commit Description:
Update TODO.taskpaper with performance things and some other issues I've previously forgotten to note.
References:
r586:b29871be6ea0 m6-tiles-and-trees
File last commit:
r0:e33f209de7e5 default
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FNA/src/Graphics/Effect/YUVToRGBA/YUVToRGBAEffect.fx
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/* YUV-to-RGBA Effect
* Written by Ethan "flibitijibibo" Lee
* http://www.flibitijibibo.com/
*
* This effect is based on the YUV-to-RGBA GLSL shader found in SDL.
* Thus, it also released under the zlib license:
* http://libsdl.org/license.php
*/
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);
/* More info about colorspace conversion:
* http://www.equasys.de/colorconversion.html
* http://www.equasys.de/colorformat.html
*/
#if 1
/* ITU-R BT.709 */
const float3 Rcoeff = float3(1.164, 0.000, 1.793);
const float3 Gcoeff = float3(1.164, -0.213, -0.533);
const float3 Bcoeff = float3(1.164, 2.112, 0.000);
#else
/* ITU-R BT.601 */
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);
#endif
float3 yuv;
yuv.x = tex2D(samp0, tex).w;
yuv.y = tex2D(samp1, tex).w;
yuv.z = tex2D(samp2, tex).w;
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();
}
}