LYGIA Shader Library

Dependencies:

• lygia/v1.1.6/sample/clamp2edge.glsl

Use:

gaussianBlur1D_fast9(<SAMPLER_TYPE> texture, <vec2> st, <vec2> pixel_direction)

Check it on Github

#ifndef GAUSSIANBLUR1D_FAST9_TYPE
#ifdef GAUSSIANBLUR_TYPE
#define GAUSSIANBLUR1D_FAST9_TYPE GAUSSIANBLUR_TYPE
#else
#define GAUSSIANBLUR1D_FAST9_TYPE vec4
#endif
#endif

#ifndef GAUSSIANBLUR1D_FAST9_SAMPLER_FNC
#ifdef GAUSSIANBLUR_SAMPLER_FNC
#define GAUSSIANBLUR1D_FAST9_SAMPLER_FNC(TEX, UV) GAUSSIANBLUR_SAMPLER_FNC(TEX, UV)
#else
#define GAUSSIANBLUR1D_FAST9_SAMPLER_FNC(TEX, UV) sampleClamp2edge(TEX, UV)
#endif
#endif

#ifndef FNC_GAUSSIANBLUR1D_FAST9
#define FNC_GAUSSIANBLUR1D_FAST9
GAUSSIANBLUR1D_FAST9_TYPE gaussianBlur1D_fast9(in SAMPLER_TYPE tex, in vec2 st, in vec2 offset) {
    GAUSSIANBLUR1D_FAST9_TYPE color = GAUSSIANBLUR1D_FAST9_TYPE(0.);
    vec2 off1 = vec2(1.3846153846) * offset;
    vec2 off2 = vec2(3.2307692308) * offset;
    color += GAUSSIANBLUR1D_FAST9_SAMPLER_FNC(tex, st) * .2270270270;
    color += GAUSSIANBLUR1D_FAST9_SAMPLER_FNC(tex, st + (off1)) * .3162162162;
    color += GAUSSIANBLUR1D_FAST9_SAMPLER_FNC(tex, st - (off1)) * .3162162162;
    color += GAUSSIANBLUR1D_FAST9_SAMPLER_FNC(tex, st + (off2)) * .0702702703;
    color += GAUSSIANBLUR1D_FAST9_SAMPLER_FNC(tex, st - (off2)) * .0702702703;
    return color;
}
#endif

Dependencies:

• lygia/v1.1.6/sample.glsl

Use:

gaussianBlur1D_fast9(<SAMPLER_TYPE> texture, <float2> st, <float2> pixel_direction)

Check it on Github

#ifndef GAUSSIANBLUR1D_FAST9_TYPE
#ifdef GAUSSIANBLUR_TYPE
#define GAUSSIANBLUR1D_FAST9_TYPE GAUSSIANBLUR_TYPE
#else
#define GAUSSIANBLUR1D_FAST9_TYPE float4
#endif
#endif

#ifndef GAUSSIANBLUR1D_FAST9_SAMPLER_FNC
#ifdef GAUSSIANBLUR_SAMPLER_FNC
#define GAUSSIANBLUR1D_FAST9_SAMPLER_FNC(TEX, UV) GAUSSIANBLUR_SAMPLER_FNC(TEX, UV)
#else
#define GAUSSIANBLUR1D_FAST9_SAMPLER_FNC(TEX, UV) SAMPLER_FNC(TEX, UV)
#endif
#endif

#ifndef FNC_GAUSSIANBLUR1D_FAST9
#define FNC_GAUSSIANBLUR1D_FAST9
GAUSSIANBLUR1D_FAST9_TYPE gaussianBlur1D_fast9(in SAMPLER_TYPE tex, in float2 st, in float2 offset) {
    float2 off1 = float2(1.3846153846, 1.3846153846) * offset;
    float2 off2 = float2(3.2307692308, 3.2307692308) * offset;
    GAUSSIANBLUR1D_FAST9_TYPE color = GAUSSIANBLUR1D_FAST9_SAMPLER_FNC(tex, st) * .2270270270;
    color += GAUSSIANBLUR1D_FAST9_SAMPLER_FNC(tex, st + (off1)) * .3162162162;
    color += GAUSSIANBLUR1D_FAST9_SAMPLER_FNC(tex, st - (off1)) * .3162162162;
    color += GAUSSIANBLUR1D_FAST9_SAMPLER_FNC(tex, st + (off2)) * .0702702703;
    color += GAUSSIANBLUR1D_FAST9_SAMPLER_FNC(tex, st - (off2)) * .0702702703;
    return color;
}
#endif