1 // Copyright (c) 2013 The Chromium OS Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 // This test evaluates the speed of using the same textures to draw repeatedly. 6 // It uploads a series of textures initially. On subsequent iterations, it uses 7 // those uploaded textures to draw. 8 9 #include "base/logging.h" 10 11 #include "texturetest.h" 12 #include "main.h" 13 14 namespace glbench { 15 16 class TextureReuseTest : public TextureTest { 17 public: 18 TextureReuseTest() {} 19 virtual ~TextureReuseTest() {} 20 virtual bool TestFunc(uint64_t iterations); 21 virtual const char* Name() const { return "texture_reuse"; } 22 virtual bool IsDrawTest() const { return true; } 23 }; 24 25 bool TextureReuseTest::TestFunc(uint64_t iterations) { 26 glGetError(); 27 28 glDrawArrays(GL_TRIANGLE_STRIP, 0, 4); 29 glFlush(); 30 31 for (uint64_t i = 0; i < iterations; ++i) { 32 glBindTexture(GL_TEXTURE_2D, textures_[i % kNumberOfTextures]); 33 switch (flavor_) { 34 case TEX_IMAGE: 35 glTexImage2D(GL_TEXTURE_2D, 0, texel_gl_format_, width_, height_, 36 0, texel_gl_format_, GL_UNSIGNED_BYTE, 37 pixels_[i % kNumberOfTextures].get()); 38 break; 39 case TEX_SUBIMAGE: 40 glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, width_, height_, 41 texel_gl_format_, GL_UNSIGNED_BYTE, 42 pixels_[i % kNumberOfTextures].get()); 43 break; 44 } 45 46 // After having uploaded |kNumberOfTextures| textures, use each of them to 47 // draw once before uploading new textures. 48 if ((i % kNumberOfTextures) == (kNumberOfTextures - 1)) { 49 for (int j = 0; j < kNumberOfTextures; ++j) { 50 glBindTexture(GL_TEXTURE_2D, textures_[j]); 51 glDrawArrays(GL_TRIANGLE_STRIP, 0, 4); 52 } 53 } 54 } 55 56 return true; 57 } 58 59 TestBase* GetTextureReuseTest() { 60 return new TextureReuseTest; 61 } 62 63 } // namespace glbench 64
