1 /* 2 * Copyright 2013 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #include "TextureRenderer.h" 18 19 #include "GLTest.h" 20 21 #include <gui/GLConsumer.h> 22 23 #include <GLES2/gl2.h> 24 #include <GLES2/gl2ext.h> 25 26 #include <gtest/gtest.h> 27 28 namespace android { 29 30 TextureRenderer::TextureRenderer(GLuint texName, 31 const sp<GLConsumer>& st) : mTexName(texName), mST(st) { 32 } 33 34 void TextureRenderer::SetUp() { 35 const char vsrc[] = 36 "attribute vec4 vPosition;\n" 37 "varying vec2 texCoords;\n" 38 "uniform mat4 texMatrix;\n" 39 "void main() {\n" 40 " vec2 vTexCoords = 0.5 * (vPosition.xy + vec2(1.0, 1.0));\n" 41 " texCoords = (texMatrix * vec4(vTexCoords, 0.0, 1.0)).xy;\n" 42 " gl_Position = vPosition;\n" 43 "}\n"; 44 45 const char fsrc[] = 46 "#extension GL_OES_EGL_image_external : require\n" 47 "precision mediump float;\n" 48 "uniform samplerExternalOES texSampler;\n" 49 "varying vec2 texCoords;\n" 50 "void main() {\n" 51 " gl_FragColor = texture2D(texSampler, texCoords);\n" 52 "}\n"; 53 54 { 55 SCOPED_TRACE("creating shader program"); 56 ASSERT_NO_FATAL_FAILURE(GLTest::createProgram(vsrc, fsrc, &mPgm)); 57 } 58 59 mPositionHandle = glGetAttribLocation(mPgm, "vPosition"); 60 ASSERT_EQ(GLenum(GL_NO_ERROR), glGetError()); 61 ASSERT_NE(-1, mPositionHandle); 62 mTexSamplerHandle = glGetUniformLocation(mPgm, "texSampler"); 63 ASSERT_EQ(GLenum(GL_NO_ERROR), glGetError()); 64 ASSERT_NE(-1, mTexSamplerHandle); 65 mTexMatrixHandle = glGetUniformLocation(mPgm, "texMatrix"); 66 ASSERT_EQ(GLenum(GL_NO_ERROR), glGetError()); 67 ASSERT_NE(-1, mTexMatrixHandle); 68 } 69 70 // drawTexture draws the GLConsumer over the entire GL viewport. 71 void TextureRenderer::drawTexture() { 72 static const GLfloat triangleVertices[] = { 73 -1.0f, 1.0f, 74 -1.0f, -1.0f, 75 1.0f, -1.0f, 76 1.0f, 1.0f, 77 }; 78 79 glVertexAttribPointer(mPositionHandle, 2, GL_FLOAT, GL_FALSE, 0, 80 triangleVertices); 81 ASSERT_EQ(GLenum(GL_NO_ERROR), glGetError()); 82 glEnableVertexAttribArray(mPositionHandle); 83 ASSERT_EQ(GLenum(GL_NO_ERROR), glGetError()); 84 85 glUseProgram(mPgm); 86 glUniform1i(mTexSamplerHandle, 0); 87 ASSERT_EQ(GLenum(GL_NO_ERROR), glGetError()); 88 glBindTexture(GL_TEXTURE_EXTERNAL_OES, mTexName); 89 ASSERT_EQ(GLenum(GL_NO_ERROR), glGetError()); 90 91 // XXX: These calls are not needed for GL_TEXTURE_EXTERNAL_OES as 92 // they're setting the defautls for that target, but when hacking 93 // things to use GL_TEXTURE_2D they are needed to achieve the same 94 // behavior. 95 glTexParameteri(GL_TEXTURE_EXTERNAL_OES, GL_TEXTURE_MIN_FILTER, 96 GL_LINEAR); 97 ASSERT_EQ(GLenum(GL_NO_ERROR), glGetError()); 98 glTexParameteri(GL_TEXTURE_EXTERNAL_OES, GL_TEXTURE_MAG_FILTER, 99 GL_LINEAR); 100 ASSERT_EQ(GLenum(GL_NO_ERROR), glGetError()); 101 glTexParameteri(GL_TEXTURE_EXTERNAL_OES, GL_TEXTURE_WRAP_S, 102 GL_CLAMP_TO_EDGE); 103 ASSERT_EQ(GLenum(GL_NO_ERROR), glGetError()); 104 glTexParameteri(GL_TEXTURE_EXTERNAL_OES, GL_TEXTURE_WRAP_T, 105 GL_CLAMP_TO_EDGE); 106 ASSERT_EQ(GLenum(GL_NO_ERROR), glGetError()); 107 108 GLfloat texMatrix[16]; 109 mST->getTransformMatrix(texMatrix); 110 glUniformMatrix4fv(mTexMatrixHandle, 1, GL_FALSE, texMatrix); 111 112 glDrawArrays(GL_TRIANGLE_FAN, 0, 4); 113 ASSERT_EQ(GLenum(GL_NO_ERROR), glGetError()); 114 } 115 116 } // namespace android 117
