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// SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#version 450 core
layout (local_size_x = 8, local_size_y = 8, local_size_z = 1) in;
layout (binding = 0, rgba8) uniform readonly restrict image2DArray img_in;
layout (binding = 1, rgba8) uniform writeonly restrict image2DMSArray output_msaa;
void main() {
const ivec3 coords = ivec3(gl_GlobalInvocationID);
if (any(greaterThanEqual(coords, imageSize(output_msaa)))) {
return;
}
// TODO: Specialization constants for num_samples?
const int num_samples = imageSamples(output_msaa);
for (int curr_sample = 0; curr_sample < num_samples; ++curr_sample) {
const int single_sample_x = 2 * coords.x + (curr_sample & 1);
const int single_sample_y = 2 * coords.y + ((curr_sample / 2) & 1);
const ivec3 single_coords = ivec3(single_sample_x, single_sample_y, coords.z);
if (any(greaterThanEqual(single_coords, imageSize(img_in)))) {
continue;
}
const vec4 pixel = imageLoad(img_in, single_coords);
imageStore(output_msaa, coords, curr_sample, pixel);
}
}
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