gpu/command_buffer/tests/gl_test_utils.h

   1 // Copyright (c) 2012 The Chromium 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 // Helper functions for GL.
   6
   7 #ifndef GPU_COMMAND_BUFFER_TESTS_GL_TEST_UTILS_H_
   8 #define GPU_COMMAND_BUFFER_TESTS_GL_TEST_UTILS_H_
   9
  10 #include <GLES2/gl2.h>
  11 #include "base/basictypes.h"
  12
  13 class GLTestHelper {
  14  public:
  15   static const uint8 kCheckClearValue = 123u;
  16
  17   static bool HasExtension(const char* extension);
  18   static bool CheckGLError(const char* msg, int line);
  19
  20   // Compiles a shader.
  21   // Returns shader, 0 on failure..
  22   static GLuint LoadShader(GLenum type, const char* shaderSrc);
  23
  24   // Attaches 2 shaders and links them to a program.
  25   // Returns program, 0 on failure..
  26   static GLuint SetupProgram(GLuint vertex_shader, GLuint fragment_shader);
  27
  28   // Compiles 2 shaders, attaches and links them to a program
  29   // Returns program, 0 on failure.
  30   static GLuint LoadProgram(
  31       const char* vertex_shader_source,
  32       const char* fragment_shader_source);
  33
  34   // Make a unit quad with position only.
  35   // Returns the created buffer.
  36   static GLuint SetupUnitQuad(GLint position_location);
  37
  38   // Make a 6 vertex colors.
  39   // Returns the created buffer.
  40   static GLuint SetupColorsForUnitQuad(
  41       GLint location, const GLfloat color[4], GLenum usage);
  42
  43   // Checks an area of pixels for a color.
  44   static bool CheckPixels(
  45       GLint x, GLint y, GLsizei width, GLsizei height, GLint tolerance,
  46       const uint8* color);
  47
  48   // Uses ReadPixels to save an area of the current FBO/Backbuffer.
  49   static bool SaveBackbufferAsBMP(const char* filename, int width, int height);
  50
  51   // Run unit tests.
  52   static int RunTests(int argc, char** argv);
  53 };
  54
  55 #endif  // GPU_COMMAND_BUFFER_TESTS_GL_TEST_UTILS_H_