LYGIA Shader Library

Dependencies:

• lygia/sampler.glsl

Use:

mean(<SAMPLER_TYPE> texture, <vec2> st, <vec2> pixel)

Check it on Github

#ifndef MEAN_TYPE
#define MEAN_TYPE vec4
#endif

#ifndef MEAN_AMOUNT
#define MEAN_AMOUNT mean4
#endif

#ifndef MEAN_SAMPLER_FNC
#define MEAN_SAMPLER_FNC(TEX, UV) SAMPLER_FNC(TEX, UV)
#endif

#ifndef FNC_AVERAGE
#define FNC_AVERAGE
MEAN_TYPE mean4(in SAMPLER_TYPE tex, in vec2 st, in vec2 pixel) {
    MEAN_TYPE topLeft = MEAN_SAMPLER_FNC(tex, st - pixel);
    MEAN_TYPE bottomLeft = MEAN_SAMPLER_FNC(tex, st + vec2(-pixel.x, pixel.y));
    MEAN_TYPE topRight = MEAN_SAMPLER_FNC(tex, st + vec2(pixel.x, -pixel.y));
    MEAN_TYPE bottomRight = MEAN_SAMPLER_FNC(tex, st + pixel);
    return 0.25 * (topLeft + topRight + bottomLeft + bottomRight);
}

MEAN_TYPE mean(in SAMPLER_TYPE tex, in vec2 st, in vec2 pixel) {
    return MEAN_AMOUNT(tex, st, pixel);
}
#endif

Dependencies:

• lygia/sampler.glsl

Use:

mean(<SAMPLER_TYPE> texture, <float2> st, <float2> pixel)

Check it on Github

#ifndef MEAN_TYPE
#define MEAN_TYPE float4
#endif

#ifndef MEAN_AMOUNT
#define MEAN_AMOUNT mean4
#endif

#ifndef MEAN_SAMPLER_FNC
#define MEAN_SAMPLER_FNC(TEX, UV) SAMPLER_FNC(TEX, UV)
#endif

#ifndef FNC_AVERAGE
#define FNC_AVERAGE
MEAN_TYPE mean4(in SAMPLER_TYPE tex, in float2 st, in float2 pixel) {
    MEAN_TYPE topLeft = MEAN_SAMPLER_FNC(tex, st - pixel);
    MEAN_TYPE bottomLeft = MEAN_SAMPLER_FNC(tex, st + float2(-pixel.x, pixel.y));
    MEAN_TYPE topRight = MEAN_SAMPLER_FNC(tex, st + float2(pixel.x, -pixel.y));
    MEAN_TYPE bottomRight = MEAN_SAMPLER_FNC(tex, st + pixel);
    return 0.25 * (topLeft + topRight + bottomLeft + bottomRight);
}

MEAN_TYPE mean(in SAMPLER_TYPE tex, in float2 st, in float2 pixel) {
    return MEAN_AMOUNT(tex, st, pixel);
}
#endif