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// Copyright (c) 2009 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.
// This file includes all the necessary GL headers and implements some useful
// utilities.
#ifndef GPU_COMMAND_BUFFER_SERVICE_GL_UTILS_H_
#define GPU_COMMAND_BUFFER_SERVICE_GL_UTILS_H_
#include <build/build_config.h>
#if defined(UNIT_TEST)
#include "gpu/command_buffer/service/gl_mock.h"
#if !defined(GL_VERTEX_PROGRAM_POINT_SIZE)
#define GL_VERTEX_PROGRAM_POINT_SIZE 0x8642
#endif
#else
#if defined(GLES2_GPU_SERVICE_BACKEND_NATIVE_GLES2)
#include <GLES2/gl2.h> // NOLINT
#define glClearDepth glClearDepthf
#define glDepthRange glDepthRangef
// Buffer Objects
#define glBindBufferARB glBindBuffer
#define glBufferDataARB glBufferData
#define glBufferSubDataARB glBufferSubData
#define glDeleteBuffersARB glDeleteBuffers
#define glGenBuffersARB glGenBuffers
// Framebuffer Objects
#define glBindFramebufferEXT glBindFramebuffer
#define glBindRenderbufferEXT glBindRenderbuffer
#define glCheckFramebufferStatusEXT glCheckFramebufferStatus
#define glDeleteFramebuffersEXT glDeleteFramebuffers
#define glDeleteRenderbuffersEXT glDeleteRenderbuffers
#define glFramebufferRenderbufferEXT glFramebufferRenderbuffer
#define glFramebufferTexture2DEXT glFramebufferTexture2D
#define glGenFramebuffersEXT glGenFramebuffers
#define glGenRenderbuffersEXT glGenRenderbuffers
#define glGetFramebufferAttachmentParameterivEXT \
glGetFramebufferAttachmentParameteriv
#define glGetRenderbufferParameterivEXT glGetRenderbufferParameteriv
#define glIsFramebufferEXT glIsFramebuffer
#define glIsRenderbufferEXT glIsFramebuffer
#define glRenderbufferStorageEXT glRenderbufferStorage
// Texture Objects
#define glGenerateMipmapEXT glGenerateMipmap
#else // !GLES2_GPU_SERVICE_BACKEND_NATIVE_GLES2
#include <GL/glew.h> // NOLINT
#if defined(OS_WIN)
#include <GL/wglew.h> // NOLINT
#elif defined(OS_LINUX)
#include <GL/glxew.h> // NOLINT
#endif // OS_WIN
// GLES2 defines not part of Desktop GL
// Shader Precision-Specified Types
#define GL_LOW_FLOAT 0x8DF0
#define GL_MEDIUM_FLOAT 0x8DF1
#define GL_HIGH_FLOAT 0x8DF2
#define GL_LOW_INT 0x8DF3
#define GL_MEDIUM_INT 0x8DF4
#define GL_HIGH_INT 0x8DF5
#endif // GLES2_GPU_SERVICE_BACKEND_NATIVE_GLES2
#endif // UNIT_TEST
#define GL_GLEXT_PROTOTYPES 1
// Define this for extra GL error debugging (slower).
// #define GL_ERROR_DEBUGGING
#ifdef GL_ERROR_DEBUGGING
#define CHECK_GL_ERROR() do { \
GLenum gl_error = glGetError(); \
LOG_IF(ERROR, gl_error != GL_NO_ERROR) << "GL Error :" << gl_error; \
} while (0)
#else // GL_ERROR_DEBUGGING
#define CHECK_GL_ERROR() void(0)
#endif // GL_ERROR_DEBUGGING
#endif // GPU_COMMAND_BUFFER_SERVICE_GL_UTILS_H_
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