1be37f88d1ae9af9885d171adb625364387257c4cAlexey Marinichev/* 2be37f88d1ae9af9885d171adb625364387257c4cAlexey Marinichev * Copyright 2010, Google Inc. 3be37f88d1ae9af9885d171adb625364387257c4cAlexey Marinichev * All rights reserved. 4be37f88d1ae9af9885d171adb625364387257c4cAlexey Marinichev * 5be37f88d1ae9af9885d171adb625364387257c4cAlexey Marinichev * Redistribution and use in source and binary forms, with or without 6be37f88d1ae9af9885d171adb625364387257c4cAlexey Marinichev * modification, are permitted provided that the following conditions are 7be37f88d1ae9af9885d171adb625364387257c4cAlexey Marinichev * met: 8be37f88d1ae9af9885d171adb625364387257c4cAlexey Marinichev * 9be37f88d1ae9af9885d171adb625364387257c4cAlexey Marinichev * * Redistributions of source code must retain the above copyright 10be37f88d1ae9af9885d171adb625364387257c4cAlexey Marinichev * notice, this list of conditions and the following disclaimer. 11be37f88d1ae9af9885d171adb625364387257c4cAlexey Marinichev * * Redistributions in binary form must reproduce the above 12be37f88d1ae9af9885d171adb625364387257c4cAlexey Marinichev * copyright notice, this list of conditions and the following disclaimer 13be37f88d1ae9af9885d171adb625364387257c4cAlexey Marinichev * in the documentation and/or other materials provided with the 14be37f88d1ae9af9885d171adb625364387257c4cAlexey Marinichev * distribution. 15be37f88d1ae9af9885d171adb625364387257c4cAlexey Marinichev * * Neither the name of Google Inc. nor the names of its 16be37f88d1ae9af9885d171adb625364387257c4cAlexey Marinichev * contributors may be used to endorse or promote products derived from 17be37f88d1ae9af9885d171adb625364387257c4cAlexey Marinichev * this software without specific prior written permission. 18be37f88d1ae9af9885d171adb625364387257c4cAlexey Marinichev * 19be37f88d1ae9af9885d171adb625364387257c4cAlexey Marinichev * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 20be37f88d1ae9af9885d171adb625364387257c4cAlexey Marinichev * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 21be37f88d1ae9af9885d171adb625364387257c4cAlexey Marinichev * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 22be37f88d1ae9af9885d171adb625364387257c4cAlexey Marinichev * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 23be37f88d1ae9af9885d171adb625364387257c4cAlexey Marinichev * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 24be37f88d1ae9af9885d171adb625364387257c4cAlexey Marinichev * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 25be37f88d1ae9af9885d171adb625364387257c4cAlexey Marinichev * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26be37f88d1ae9af9885d171adb625364387257c4cAlexey Marinichev * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27be37f88d1ae9af9885d171adb625364387257c4cAlexey Marinichev * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28be37f88d1ae9af9885d171adb625364387257c4cAlexey Marinichev * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 29be37f88d1ae9af9885d171adb625364387257c4cAlexey Marinichev * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30be37f88d1ae9af9885d171adb625364387257c4cAlexey Marinichev */ 31be37f88d1ae9af9885d171adb625364387257c4cAlexey Marinichev 32be37f88d1ae9af9885d171adb625364387257c4cAlexey Marinichev/* 33be37f88d1ae9af9885d171adb625364387257c4cAlexey Marinichev * This is a semiplanar YUV to RGB conversion shader that uses separate 34be37f88d1ae9af9885d171adb625364387257c4cAlexey Marinichev * samplers to hold Y, and UV components. 35be37f88d1ae9af9885d171adb625364387257c4cAlexey Marinichev */ 36be37f88d1ae9af9885d171adb625364387257c4cAlexey Marinichev 37be37f88d1ae9af9885d171adb625364387257c4cAlexey Marinichevuniform sampler2D ySampler; 38be37f88d1ae9af9885d171adb625364387257c4cAlexey Marinichevuniform sampler2D uvSampler; /* GL_LUMINANCE_ALPHA */ 39be37f88d1ae9af9885d171adb625364387257c4cAlexey Marinichev 40be37f88d1ae9af9885d171adb625364387257c4cAlexey Marinichev#if defined (USE_UNIFORM_MATRIX) 41be37f88d1ae9af9885d171adb625364387257c4cAlexey Marinichevuniform mat4 conversion; 42be37f88d1ae9af9885d171adb625364387257c4cAlexey Marinichev#endif 43be37f88d1ae9af9885d171adb625364387257c4cAlexey Marinichev 44be37f88d1ae9af9885d171adb625364387257c4cAlexey Marinichevvarying vec2 yPlane; 45be37f88d1ae9af9885d171adb625364387257c4cAlexey Marinichevvarying vec2 uvPlane; 46be37f88d1ae9af9885d171adb625364387257c4cAlexey Marinichev 47be37f88d1ae9af9885d171adb625364387257c4cAlexey Marinichevvoid main() { 48be37f88d1ae9af9885d171adb625364387257c4cAlexey Marinichev float yChannel = texture2D(ySampler, yPlane).r; 49be37f88d1ae9af9885d171adb625364387257c4cAlexey Marinichev vec2 uvChannel = texture2D(uvSampler, uvPlane).ra; 50be37f88d1ae9af9885d171adb625364387257c4cAlexey Marinichev /* 51be37f88d1ae9af9885d171adb625364387257c4cAlexey Marinichev * This does the colorspace conversion from Y'UV to RGB as a matrix 52be37f88d1ae9af9885d171adb625364387257c4cAlexey Marinichev * multiply. It also does the offset of the U and V channels from 53be37f88d1ae9af9885d171adb625364387257c4cAlexey Marinichev * [0,1] to [-.5,.5] as part of the transform. 54be37f88d1ae9af9885d171adb625364387257c4cAlexey Marinichev */ 55be37f88d1ae9af9885d171adb625364387257c4cAlexey Marinichev vec4 channels = vec4(yChannel, uvChannel, 1.0); 56be37f88d1ae9af9885d171adb625364387257c4cAlexey Marinichev 57be37f88d1ae9af9885d171adb625364387257c4cAlexey Marinichev#if !defined(USE_UNIFORM_MATRIX) 58be37f88d1ae9af9885d171adb625364387257c4cAlexey Marinichev mat4 conversion = mat4( 1.0, 1.0, 1.0, 0.0, 59be37f88d1ae9af9885d171adb625364387257c4cAlexey Marinichev 0.0, -0.344, 1.772, 0.0, 60be37f88d1ae9af9885d171adb625364387257c4cAlexey Marinichev 1.402, -0.714, 0.0, 0.0, 61be37f88d1ae9af9885d171adb625364387257c4cAlexey Marinichev -0.701, 0.529, -0.886, 1.0); 62be37f88d1ae9af9885d171adb625364387257c4cAlexey Marinichev#endif 63be37f88d1ae9af9885d171adb625364387257c4cAlexey Marinichev 64be37f88d1ae9af9885d171adb625364387257c4cAlexey Marinichev gl_FragColor = conversion * channels; 65be37f88d1ae9af9885d171adb625364387257c4cAlexey Marinichev} 66