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 "main.h" 10 #include "texturetest.h" 11 12 namespace glbench { 13 14 class TextureReuseTest : public TextureTest { 15 public: 16 TextureReuseTest() {} 17 virtual ~TextureReuseTest() {} 18 virtual bool TestFunc(uint64_t iterations); 19 virtual const char* Name() const { return "texture_reuse"; } 20 virtual bool IsDrawTest() const { return true; } 21 }; 22 23 bool TextureReuseTest::TestFunc(uint64_t iterations) { 24 glGetError(); 25 26 glDrawArrays(GL_TRIANGLE_STRIP, 0, 4); 27 glFlush(); 28 29 for (uint64_t i = 0; i < iterations; ++i) { 30 glBindTexture(GL_TEXTURE_2D, textures_[i % kNumberOfTextures]); 31 switch (flavor_) { 32 case TEX_IMAGE: 33 glTexImage2D(GL_TEXTURE_2D, 0, texel_gl_format_, width_, height_, 0, 34 texel_gl_format_, GL_UNSIGNED_BYTE, 35 pixels_[i % kNumberOfTextures].get()); 36 break; 37 case TEX_SUBIMAGE: 38 glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, width_, height_, 39 texel_gl_format_, GL_UNSIGNED_BYTE, 40 pixels_[i % kNumberOfTextures].get()); 41 break; 42 } 43 44 // After having uploaded |kNumberOfTextures| textures, use each of them to 45 // draw once before uploading new textures. 46 if ((i % kNumberOfTextures) == (kNumberOfTextures - 1)) { 47 for (int j = 0; j < kNumberOfTextures; ++j) { 48 glBindTexture(GL_TEXTURE_2D, textures_[j]); 49 glDrawArrays(GL_TRIANGLE_STRIP, 0, 4); 50 } 51 } 52 } 53 54 return true; 55 } 56 57 TestBase* GetTextureReuseTest() { 58 return new TextureReuseTest; 59 } 60 61 } // namespace glbench 62
