LYGIA Shader Library

Dependencies:

• lygia/sampler.glsl

Use:

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

Check it on Github

#ifndef SHARPENFAST_KERNELSIZE
#ifdef SHARPEN_KERNELSIZE
#define SHARPENFAST_KERNELSIZE SHARPEN_KERNELSIZE
#else
#define SHARPENFAST_KERNELSIZE 2
#endif
#endif

#ifndef SHARPENFAST_TYPE
#ifdef SHARPEN_TYPE
#define SHARPENFAST_TYPE SHARPEN_TYPE
#else
#define SHARPENFAST_TYPE vec3
#endif
#endif

#ifndef SHARPENFAST_SAMPLER_FNC
#ifdef SHARPEN_SAMPLER_FNC
#define SHARPENFAST_SAMPLER_FNC(TEX, UV) SHARPEN_SAMPLER_FNC(TEX, UV)
#else
#define SHARPENFAST_SAMPLER_FNC(TEX, UV) SAMPLER_FNC(TEX, UV).rgb
#endif
#endif

#ifndef FNC_SHARPENFAST
#define FNC_SHARPENFAST
SHARPENFAST_TYPE sharpenFast(in SAMPLER_TYPE tex, in vec2 coords, in vec2 pixel, float strength) {
    SHARPENFAST_TYPE sum = SHARPENFAST_TYPE(0.);
    for (int i = 0; i < SHARPENFAST_KERNELSIZE; i++) {
        float f_size = float(i) + 1.;
        f_size *= strength;
        sum += -1. * SHARPENFAST_SAMPLER_FNC(tex, coords + vec2( -1., 0.) * pixel * f_size);
        sum += -1. * SHARPENFAST_SAMPLER_FNC(tex, coords + vec2( 0., -1.) * pixel * f_size);
        sum +=  5. * SHARPENFAST_SAMPLER_FNC(tex, coords + vec2( 0., 0.) * pixel * f_size);
        sum += -1. * SHARPENFAST_SAMPLER_FNC(tex, coords + vec2( 0., 1.) * pixel * f_size);
        sum += -1. * SHARPENFAST_SAMPLER_FNC(tex, coords + vec2( 1., 0.) * pixel * f_size);
    }
    return sum / float(SHARPENFAST_KERNELSIZE);
}

SHARPENFAST_TYPE sharpenFast(in SAMPLER_TYPE tex, in vec2 coords, in vec2 pixel) {
    SHARPENFAST_TYPE sum = SHARPENFAST_TYPE(0.);
    for (int i = 0; i < SHARPENFAST_KERNELSIZE; i++) {
        float f_size = float(i) + 1.;
        sum += -1. * SHARPENFAST_SAMPLER_FNC(tex, coords + vec2( -1., 0.) * pixel * f_size);
        sum += -1. * SHARPENFAST_SAMPLER_FNC(tex, coords + vec2( 0., -1.) * pixel * f_size);
        sum +=  5. * SHARPENFAST_SAMPLER_FNC(tex, coords + vec2( 0., 0.) * pixel * f_size);
        sum += -1. * SHARPENFAST_SAMPLER_FNC(tex, coords + vec2( 0., 1.) * pixel * f_size);
        sum += -1. * SHARPENFAST_SAMPLER_FNC(tex, coords + vec2( 1., 0.) * pixel * f_size);
    }
    return sum / float(SHARPENFAST_KERNELSIZE);
}
#endif

Dependencies:

• lygia/sampler.glsl

Use:

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

Check it on Github

#ifndef SHARPENFAST_KERNELSIZE
#ifdef SHARPEN_KERNELSIZE
#define SHARPENFAST_KERNELSIZE SHARPEN_KERNELSIZE
#else
#define SHARPENFAST_KERNELSIZE 2
#endif
#endif

#ifndef SHARPENFAST_TYPE
#ifdef SHARPEN_TYPE
#define SHARPENFAST_TYPE SHARPEN_TYPE
#else
#define SHARPENFAST_TYPE float3
#endif
#endif

#ifndef SHARPENFAST_SAMPLER_FNC
#ifdef SHARPEN_SAMPLER_FNC
#define SHARPENFAST_SAMPLER_FNC(TEX, UV) SHARPEN_SAMPLER_FNC(TEX, UV)
#else
#define SHARPENFAST_SAMPLER_FNC(TEX, UV) SAMPLER_FNC(TEX, UV).rgb
#endif
#endif

#ifndef FNC_SHARPENFAST
#define FNC_SHARPENFAST
SHARPENFAST_TYPE sharpenFast(in SAMPLER_TYPE tex, in float2 coords, in float2 pixel, float strength) {
    SHARPENFAST_TYPE sum = float4(0.0,0.0,0.0,0.0);
    for (int i = 0; i < SHARPENFAST_KERNELSIZE; i++) {
        float f_size = float(i) + 1.;
        f_size *= strength;
        sum += -1. * SHARPENFAST_SAMPLER_FNC(tex, coords + float2( -1., 0.) * pixel * f_size);
        sum += -1. * SHARPENFAST_SAMPLER_FNC(tex, coords + float2( 0., -1.) * pixel * f_size);
        sum +=  5. * SHARPENFAST_SAMPLER_FNC(tex, coords + float2( 0., 0.) * pixel * f_size);
        sum += -1. * SHARPENFAST_SAMPLER_FNC(tex, coords + float2( 0., 1.) * pixel * f_size);
        sum += -1. * SHARPENFAST_SAMPLER_FNC(tex, coords + float2( 1., 0.) * pixel * f_size);
    }
    return sum / float(SHARPENFAST_KERNELSIZE);
}

SHARPENFAST_TYPE sharpenFast(in SAMPLER_TYPE tex, in float2 coords, in float2 pixel) {
    SHARPENFAST_TYPE sum = float4(0.0,0.0,0.0,0.0);
    for (int i = 0; i < SHARPENFAST_KERNELSIZE; i++) {
        float f_size = float(i) + 1.;
        sum += -1. * SHARPENFAST_SAMPLER_FNC(tex, coords + float2( -1., 0.) * pixel * f_size);
        sum += -1. * SHARPENFAST_SAMPLER_FNC(tex, coords + float2( 0., -1.) * pixel * f_size);
        sum +=  5. * SHARPENFAST_SAMPLER_FNC(tex, coords + float2( 0., 0.) * pixel * f_size);
        sum += -1. * SHARPENFAST_SAMPLER_FNC(tex, coords + float2( 0., 1.) * pixel * f_size);
        sum += -1. * SHARPENFAST_SAMPLER_FNC(tex, coords + float2( 1., 0.) * pixel * f_size);
    }
    return sum / float(SHARPENFAST_KERNELSIZE);
}
#endif

Use:

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

Check it on Github

const SHARPENFAST_KERNELSIZE = 2;

fn sharpenFast(myTexture
               : texture_2d<f32>, mySampler
               : sampler, coords
               : vec2f, pixel
               : vec2f, strength
               : f32) -> vec4f {
    var sum = vec4f(0.);
    for (var i = 0; i < SHARPENFAST_KERNELSIZE; i++) {
        var f_size = f32(i) + 1.;
        f_size *= strength;
        sum += -1. * textureSampleBaseClampToEdge(myTexture, mySampler, coords + vec2(-1., 0.) * pixel * f_size);
        sum += -1. * textureSampleBaseClampToEdge(myTexture, mySampler, coords + vec2(0., -1.) * pixel * f_size);
        sum += 5. * textureSampleBaseClampToEdge(myTexture, mySampler, coords + vec2(0., 0.) * pixel * f_size);
        sum += -1. * textureSampleBaseClampToEdge(myTexture, mySampler, coords + vec2(0., 1.) * pixel * f_size);
        sum += -1. * textureSampleBaseClampToEdge(myTexture, mySampler, coords + vec2(1., 0.) * pixel * f_size);
    }
    return sum / f32(SHARPENFAST_KERNELSIZE);
}