lygia/color/layer/addSourceOver)Add Blending with Porter Duff Source Over Compositing
Dependencies:
Use:
<vec4> layerAddSourceOver(<vec4> src, <vec4> dst)
#ifndef FNC_LAYER_ADD_SRC_OVER
#define FNC_LAYER_ADD_SRC_OVER
vec4 layerAddSourceOver(vec4 src, vec4 dest) {
vec4 result = vec4(0.0, 0.0, 0.0, 0.0);
// Compute add for RGB channels
vec3 blendedColor = blendAdd(src.rgb, dest.rgb);
// Compute source-over for RGB channels
result.rgb = compositeSourceOver(blendedColor, dest.rgb, src.a, dest.a);
// Compute source-over for the alpha channel
result.a = compositeSourceOver(src.a, dest.a);
return result;
}
#endif
Dependencies:
Use:
<float4> layerAddSourceOver(<float4> src, <float4> dst)
#ifndef FNC_LAYER_ADD_SRC_OVER
#define FNC_LAYER_ADD_SRC_OVER
float4 layerAddSourceOver(float4 src, float4 dest) {
float4 result = float4(0.0, 0.0, 0.0, 0.0);
// Compute add for RGB channels
float3 blendedColor = blendAdd(src.rgb, dest.rgb);
// Compute source-over for RGB channels
result.rgb = compositeSourceOver(blendedColor, dest.rgb, src.a, dest.a);
// Compute source-over for the alpha channel
result.a = compositeSourceOver(src.a, dest.a);
return result;
}
#endif
Dependencies:
Use:
<float4> layerAddSourceOver(<float4> src, <float4> dst)
#ifndef FNC_LAYER_ADD_SRC_OVER
#define FNC_LAYER_ADD_SRC_OVER
float4 layerAddSourceOver(float4 src, float4 dest)
{
float4 result;
// Compute add for RGB channels
float3 blendedColor = blendAdd(src.rgb, dest.rgb);
// Compute source-over for RGB channels
result.rgb = compositeSourceOver(blendedColor, dest.rgb, src.a, dest.a);
// Compute source-over for the alpha channel
result.a = compositeSourceOver(src.a, dest.a);
return result;
}
#endif
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