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eglglessink: GLSL: Planar YUV converters optimization

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- Use consts for the transform's offset and cofficients values
- Use dot product instead of mult and add
- Avoid unneeded texture lookups
This commit is contained in:
Reynaldo H. Verdejo Pinochet 2012-10-10 11:50:28 -03:00 committed by Sebastian Dröge
parent 846e77871b
commit 73d865091c
1 changed files with 26 additions and 20 deletions
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46
ext/eglgles/gsteglglessink.c
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@ -264,18 +264,21 @@ static const char *frag_PLANAR_YUV_prog = {
"precision mediump float;"
"varying vec2 opos;"
"uniform sampler2D Ytex,Utex,Vtex;"
"const vec3 offset = vec3(-0.0625, -0.5, -0.5);"
"const vec3 rcoeff = vec3(1.164, 0.000, 1.596);"
"const vec3 gcoeff = vec3(1.164,-0.391,-0.813);"
"const vec3 bcoeff = vec3(1.164, 2.018, 0.000);"
"void main(void) {"
" float r,g,b,y,u,v;"
" float r,g,b;"
" vec3 yuv;"
" vec2 nxy = opos.xy;"
" y=texture2D(Ytex,nxy).r;"
" u=texture2D(Utex,nxy).r;"
" v=texture2D(Vtex,nxy).r;"
" y=1.1643*(y-0.0625);"
" u=u-0.5;"
" v=v-0.5;"
" r=y+1.5958*v;"
" g=y-0.39173*u-0.81290*v;"
" b=y+2.017*u;"
" yuv.x=texture2D(Ytex,nxy).r;"
" yuv.y=texture2D(Utex,nxy).r;"
" yuv.z=texture2D(Vtex,nxy).r;"
" yuv += offset;"
" r = dot(yuv, rcoeff);"
" g = dot(yuv, gcoeff);"
" b = dot(yuv, bcoeff);"
" gl_FragColor=vec4(r,g,b,1.0);"
"}"
};
@ -285,18 +288,21 @@ static const char *frag_NV12_NV21_prog = {
"precision mediump float;"
"varying vec2 opos;"
"uniform sampler2D Ytex,UVtex;"
"const vec3 offset = vec3(-0.0625, -0.5, -0.5);"
"const vec3 rcoeff = vec3(1.164, 0.000, 1.596);"
"const vec3 gcoeff = vec3(1.164,-0.391,-0.813);"
"const vec3 bcoeff = vec3(1.164, 2.018, 0.000);"
"void main(void) {"
" float r,g,b,y,u,v;"
" float r,g,b;"
" vec3 yuv;"
" vec2 nxy = opos.xy;"
" y=texture2D(Ytex,nxy).r;"
" u=texture2D(UVtex,nxy).%c;"
" v=texture2D(UVtex,nxy).%c;"
" y=1.1643*(y-0.0625);"
" u=u-0.5;"
" v=v-0.5;"
" r=y+1.5958*v;"
" g=y-0.39173*u-0.81290*v;"
" b=y+2.017*u;"
" yuv.x=texture2D(Ytex,nxy).r;"
" yuv.y=texture2D(UVtex,nxy).%c;"
" yuv.z=texture2D(UVtex,nxy).%c;"
" yuv += offset;"
" r = dot(yuv, rcoeff);"
" g = dot(yuv, gcoeff);"
" b = dot(yuv, bcoeff);"
" gl_FragColor=vec4(r,g,b,1.0);"
"}"
};