slang-shaders/bezel/koko-aio/shaders/bloom_pass_1.slang

#version 450

// This is one of several passes needed to cheaply emulate the bloom effect.

#include "config.inc"

#pragma stage vertex
layout(location = 0) in vec4 Position;
layout(location = 1) in vec2 TexCoord;
layout(location = 0) out vec2 vTexCoord;

void main() {
   gl_Position = global.MVP * Position;
   vTexCoord = TexCoord;
}

#pragma stage fragment

layout(location = 0) in vec2 vTexCoord;
layout(location = 0) out vec4 FragColor;
layout(set = 0, binding = 2) uniform sampler2D first_pass;

#include "includes/blooms.include.slang"
#include "includes/functions.include.slang"

void main() {
    if (DO_BLOOM == 0.0) return;
    
    vec3 bloomed = bloom(
        first_pass,
        vTexCoord,
        params.OriginalSize,
        vec2(BLOOM_SIZE),
        BLOOM_QUALITY,
        BLOOM_GAMMA,
        0.0,
        0.0
    );

    bloomed = apply_fuzzy_main_pass(bloomed) * BLOOM_POWER;
    FragColor = vec4(bloomed, 1.0);
    
}