kiyo 0.0.7

Lightweight compute shader playground
Documentation 
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#version 450

/*
 * Kiyo data
 * - WORKGROUP_SIZE and NUM_IMAGES are provided by the engine
 */

layout ( local_size_x = WORKGROUP_SIZE, local_size_y = WORKGROUP_SIZE, local_size_z = 1 ) in;
layout( binding = 0, rgba8 ) uniform image2D images[NUM_IMAGES];
layout( binding = 1, r32ui ) uniform uimage2D counterImages[3];

layout( push_constant ) uniform PushConstants
{
    float time;
    int in_image;
    int out_image;
} constants;

/*
 * User data
 */

vec3 palette( in float t, in vec3 a, in vec3 b, in vec3 c, in vec3 d )
{
    return a + b*cos( 6.28318*(c*t+d) );
}

float gold_noise(vec2 xy, float seed) {
    return fract(tan(distance(xy * 1.61803398874989484820459, xy) * seed) * xy.x);
}

void main()
{
    ivec2 p = ivec2( gl_GlobalInvocationID.xy );
    ivec2 screenSize = imageSize( images[ constants.out_image ] );

    if( p.x > screenSize.x || p.y > screenSize.y )
    {
        return;
    }

    uint r = imageLoad(counterImages[0], p).r;
    uint g = imageLoad(counterImages[1], p).r;
    uint b = imageLoad(counterImages[2], p).r;
    vec3 color = vec3(r, g, b) / 9900.0;

    imageStore( images[ constants.out_image ], p, vec4( color, 1 ) );
}