20 lines
567 B
GLSL
20 lines
567 B
GLSL
uniform sampler2D sampler;
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uniform float opacity;
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uniform float brightness;
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uniform float saturation;
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varying vec2 varyingTexCoords;
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void main()
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{
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vec4 tex = texture2D(sampler, varyingTexCoords);
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if( saturation != 1.0 )
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{
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vec3 desaturated = tex.rgb * vec3( 0.30, 0.59, 0.11 );
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desaturated = vec3( dot( desaturated, tex.rgb ));
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tex.rgb = tex.rgb * vec3( saturation ) + desaturated * vec3( 1.0 - saturation );
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}
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// tex.rgb = tex.rgb * opacity * brightness;
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// tex.a = tex.a * opacity;
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gl_FragColor = tex;
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}
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