50 lines
1.6 KiB
GLSL
50 lines
1.6 KiB
GLSL
//
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// Copyright (c) Microsoft. All rights reserved.
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// This code is licensed under the MIT License (MIT).
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// THIS CODE IS PROVIDED *AS IS* WITHOUT WARRANTY OF
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// ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING ANY
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// IMPLIED WARRANTIES OF FITNESS FOR A PARTICULAR
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// PURPOSE, MERCHANTABILITY, OR NON-INFRINGEMENT.
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//
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// Developed by Minigraph
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//
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// Author: James Stanard
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//
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#[compute]
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#version 450
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VERSION_DEFINES
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layout(local_size_x = 8, local_size_y = 8, local_size_z = 1) in;
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layout(r32f, set = 0, binding = 0) uniform restrict readonly image2D downsampled4x;
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layout(r32f, set = 1, binding = 0) uniform restrict writeonly image2D downsampled8x;
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layout(r16f, set = 2, binding = 0) uniform restrict writeonly image2DArray downsampled8x_atlas;
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layout(r32f, set = 3, binding = 0) uniform restrict writeonly image2D downsampled16x;
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layout(r16f, set = 4, binding = 0) uniform restrict writeonly image2DArray downsampled16x_atlas;
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void main() {
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vec4 w1 = imageLoad(downsampled4x, min(ivec2(gl_GlobalInvocationID.xy << 1), imageSize(downsampled4x) - ivec2(2)));
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uvec2 pos = gl_GlobalInvocationID.xy;
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uvec2 pos_atlas = pos >> 2;
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uint pos_slice = (pos.x & 3) | ((pos.y & 3) << 2);
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ivec2 ds8s = imageSize(downsampled8x);
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if (pos.x < ds8s.x && pos.y < ds8s.y) {
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imageStore(downsampled8x, ivec2(pos), w1);
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}
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imageStore(downsampled8x_atlas, ivec3(pos_atlas, pos_slice), w1);
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if ((gl_LocalInvocationIndex & 011) == 0) {
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uvec2 pos = gl_GlobalInvocationID.xy >> 1;
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uvec2 pos_atlas = pos >> 2;
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uint pos_slice = (pos.x & 3) | ((pos.y & 3) << 2);
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imageStore(downsampled16x, ivec2(pos), w1);
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imageStore(downsampled16x_atlas, ivec3(pos_atlas, pos_slice), w1);
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}
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}
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