1 /* 2 * Copyright (c) 2010, Google Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are 6 * met: 7 * 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above 11 * copyright notice, this list of conditions and the following disclaimer 12 * in the documentation and/or other materials provided with the 13 * distribution. 14 * * Neither the name of Google Inc. nor the names of its 15 * contributors may be used to endorse or promote products derived from 16 * this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #include "config.h" 32 33 #if ENABLE(ACCELERATED_2D_CANVAS) 34 35 #include "TexShader.h" 36 37 #include "GraphicsContext3D.h" 38 39 namespace WebCore { 40 41 TexShader::TexShader(GraphicsContext3D* context, unsigned program) 42 : Shader(context, program) 43 { 44 m_matrixLocation = context->getUniformLocation(program, "matrix"); 45 m_texMatrixLocation = context->getUniformLocation(program, "texMatrix"); 46 m_alphaLocation = context->getUniformLocation(program, "globalAlpha"); 47 m_positionLocation = context->getAttribLocation(program, "position"); 48 m_samplerLocation = context->getUniformLocation(program, "sampler"); 49 } 50 51 PassOwnPtr<TexShader> TexShader::create(GraphicsContext3D* context) 52 { 53 unsigned program = loadProgram(context, 54 generateVertex(Shader::TwoDimensional, Shader::TextureFill), 55 generateFragment(Shader::TwoDimensional, Shader::TextureFill, Shader::NotAntialiased)); 56 if (!program) 57 return 0; 58 return new TexShader(context, program); 59 } 60 61 void TexShader::use(const AffineTransform& transform, const AffineTransform& texTransform, int sampler, float alpha) 62 { 63 m_context->useProgram(m_program); 64 float matrix[9]; 65 affineTo3x3(transform, matrix); 66 m_context->uniformMatrix3fv(m_matrixLocation, false /*transpose*/, matrix, 1 /*count*/); 67 68 float texMatrix[9]; 69 affineTo3x3(texTransform, texMatrix); 70 m_context->uniformMatrix3fv(m_texMatrixLocation, false /*transpose*/, texMatrix, 1 /*count*/); 71 72 m_context->uniform1i(m_samplerLocation, sampler); 73 m_context->uniform1f(m_alphaLocation, alpha); 74 75 m_context->vertexAttribPointer(m_positionLocation, 2, GraphicsContext3D::FLOAT, false, 0, 0); 76 77 m_context->enableVertexAttribArray(m_positionLocation); 78 79 } 80 81 } 82 83 #endif 84
