LYGIA Shader Library

sourceOver (`lygia`/`color`/`composite`/`sourceOver`)

Porter Duff Source Over Compositing

Use:

<vec4> compositeSourceOver(<vec4> src, <vec4> dst)

Check it on Github


#ifndef FNC_COMPOSITE_SRC_OVER
#define FNC_COMPOSITE_SRC_OVER

float compositeSourceOver(float src, float dst) {
    return src + dst * (1.0 - src);
}

vec3 compositeSourceOver(vec3 srcColor, vec3 dstColor, float srcAlpha, float dstAlpha) {
    return srcColor * srcAlpha + dstColor * dstAlpha * (1.0 - srcAlpha);
}

vec4 compositeSourceOver(vec4 srcColor, vec4 dstColor) {
    vec4 result = vec4(0.0);

    result.rgb = compositeSourceOver(srcColor.rgb, dstColor.rgb, srcColor.a, dstColor.a);
    result.a = compositeSourceOver(srcColor.a, dstColor.a);

    return result;
}



#endif

Use:

<float4> compositeSourceOver(<float4> src, <float4> dst)

Check it on Github


#ifndef FNC_COMPOSITE_SRC_OVER
#define FNC_COMPOSITE_SRC_OVER

float compositeSourceOver(float src, float dst) {
    return src + dst * (1.0 - src);
}

float3 compositeSourceOver(float3 srcColor, float3 dstColor, float srcAlpha, float dstAlpha) {
    return srcColor * srcAlpha + dstColor * dstAlpha * (1.0 - srcAlpha);
}

float4 compositeSourceOver(float4 srcColor, float4 dstColor) {
    float4 result;

    result.rgb = compositeSourceOver(srcColor.rgb, dstColor.rgb, srcColor.a, dstColor.a);
    result.a = compositeSourceOver(srcColor.a, dstColor.a);

    return result;
}



#endif

Use:

<float4> compositeSourceOver(<float4> src, <float4> dst)

Check it on Github


#ifndef FNC_COMPOSITE_SRC_OVER
#define FNC_COMPOSITE_SRC_OVER

float compositeSourceOver(float src, float dst)
{
    return src + dst * (1.0 - src);
}

float3 compositeSourceOver(float3 srcColor, float3 dstColor, float srcAlpha, float dstAlpha)
{
    return srcColor * srcAlpha + dstColor * dstAlpha * (1.0 - srcAlpha);
}

float4 compositeSourceOver(float4 srcColor, float4 dstColor)
{
    float4 result;

    result.rgb = compositeSourceOver(srcColor.rgb, dstColor.rgb, srcColor.a, dstColor.a);
    result.a = compositeSourceOver(srcColor.a, dstColor.a);

    return result;
}



#endif

Licenses

LYGIA is dual-licensed under the Prosperity License and the Patron License for sponsors and contributors.

Sponsors and contributors are automatically added to the Patron License and they can ignore the any non-commercial rule of the Prosperity Licensed software (please take a look to the exception).

It's also possible to get a permanent comercial license hook to a single and specific version of LYGIA.

LYGIA Shader Library

sourceOver (lygia/color/composite/sourceOver)

Licenses

Get the latest news and releases

sourceOver (`lygia`/`color`/`composite`/`sourceOver`)