1/* 2 * Copyright 2020-2022 Matias N. Goldberg 3 * Copyright 2022 Intel Corporation 4 * 5 * Permission is hereby granted, free of charge, to any person obtaining a 6 * copy of this software and associated documentation files (the "Software"), 7 * to deal in the Software without restriction, including without limitation 8 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 9 * and/or sell copies of the Software, and to permit persons to whom the 10 * Software is furnished to do so, subject to the following conditions: 11 * 12 * The above copyright notice and this permission notice shall be included in 13 * all copies or substantial portions of the Software. 14 * 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 18 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 21 * DEALINGS IN THE SOFTWARE. 22 */ 23 24// RGB and Alpha components of ETC2 RGBA are computed separately. 25// This compute shader merely stitches them together to form the final result 26// It's also used by RG11 driver to stitch two R11 into one RG11 27 28#version 310 es 29 30%s // include "CrossPlatformSettings_piece_all.glsl" 31 32layout( local_size_x = 8, // 33 local_size_y = 8, // 34 local_size_z = 1 ) in; 35 36layout( binding = 0 ) uniform highp usampler2D srcRGB; 37layout( binding = 1 ) uniform highp usampler2D srcAlpha; 38layout( rgba32ui ) uniform restrict writeonly highp uimage2D dstTexture; 39 40void main() 41{ 42 uint2 etcRgb = OGRE_Load2D( srcRGB, int2( gl_GlobalInvocationID.xy ), 0 ).xy; 43 uint2 etcAlpha = OGRE_Load2D( srcAlpha, int2( gl_GlobalInvocationID.xy ), 0 ).xy; 44 45 imageStore( dstTexture, int2( gl_GlobalInvocationID.xy ), uint4( etcAlpha.xy, etcRgb.xy ) ); 46} 47