#version 460 core
#extension GL_ARB_separate_shader_objects : enable
#extension GL_ARB_shading_language_420pack : enable

// includes

#include "common/bloom_common.h"

// sets

#include "render/shaders/common/render_post_process_layout_common.h"

layout(set = 1, binding = 0, rgba16f/*r11f_g11f_b10f*/) uniform writeonly image2D uWoTex;
layout(set = 1, binding = 1) uniform texture2D uTex;
layout(set = 1, binding = 2) uniform sampler uSampler;

///////////////////////////////////////////////////////////////////////////////
// bloom downscale

#define cTgs 8

layout(local_size_x = cTgs, local_size_y = cTgs, local_size_z = 1) in;
void main()
{
    // texSizeInvTexSize needs to be the output resolution
    const vec2 uv = (vec2(gl_GlobalInvocationID.xy) + 0.5) * uPc.viewportSizeInvSize.zw;

    vec3 color = vec3(0.0);
    if ((CORE_BLOOM_QUALITY_NORMAL & CORE_POST_PROCESS_FLAGS) == CORE_BLOOM_QUALITY_NORMAL) {
        color = bloomDownscale9(uv, uPc.viewportSizeInvSize.zw, uTex, uSampler);
    } else {
        color = bloomDownscale(uv, uPc.viewportSizeInvSize.zw, uTex, uSampler);
    }

    imageStore(uWoTex, ivec2(gl_GlobalInvocationID.xy), vec4(min(color, CORE_BLOOM_CLAMP_MAX_VALUE), 1.0));
}