ui/gl/test/gl_test_helper.h

// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef UI_GL_TEST_GL_TEST_HELPER_H_
#define UI_GL_TEST_GL_TEST_HELPER_H_

#include <stdint.h>

#include "ui/gl/gl_bindings.h"

namespace gl {

class GLTestHelper {
 public:
  // Creates a texture object.
  // Does not check for errors, always returns texture.
  static GLuint CreateTexture(GLenum target);

  // Creates a framebuffer, attaches a color buffer, and checks for errors.
  // Returns framebuffer, 0 on failure.
  static GLuint SetupFramebuffer(int width, int height);

  // Checks an area of pixels for a color.
  static bool CheckPixels(GLint x,
                          GLint y,
                          GLsizei width,
                          GLsizei height,
                          const uint8_t expected_color[4]);

  // Checks an area of pixels for a color, given an admissible per component
  // error.
  static bool CheckPixelsWithError(GLint x,
                                   GLint y,
                                   GLsizei width,
                                   GLsizei height,
                                   int error,
                                   const uint8_t expected_color[4]);
};

}  // namespace gl

#endif  // UI_GL_TEST_GL_TEST_HELPER_H_