LookingGlass/client/renderers/EGL/shader/desktop_yuv.frag

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#version 300 es
in highp vec2 uv;
out highp vec4 color;
uniform int nearest;
uniform highp vec2 size;
uniform int nv;
uniform highp float nvGain;
uniform sampler2D sampler1;
uniform sampler2D sampler2;
uniform sampler2D sampler3;
void main()
{
highp vec4 yuv;
if(nearest == 1)
{
yuv = vec4(
texture(sampler1, uv).r,
texture(sampler2, uv).r,
texture(sampler3, uv).r,
1.0
);
}
else
{
highp ivec2 px = ivec2(uv * size);
yuv = vec4(
texelFetch(sampler1, px, 0).r,
texelFetch(sampler2, px, 0).r,
texelFetch(sampler3, px, 0).r,
1.0
);
}
highp mat4 yuv_to_rgb = mat4(
1.0, 0.0 , 1.402, -0.701,
1.0, -0.344, -0.714, 0.529,
1.0, 1.772, 0.0 , -0.886,
1.0, 1.0 , 1.0 , 1.0
);
color = yuv * yuv_to_rgb;
if (nv == 1)
{
highp float lumi = 1.0 - (0.2126 * color.r + 0.7152 * color.g + 0.0722 * color.b);
color *= 1.0 + lumi;
color *= nvGain;
}
}