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/*
* Copyright 2009, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef O3D_CORE_CROSS_GLES2_GL_HEADERS_H_
#define O3D_CORE_CROSS_GLES2_GL_HEADERS_H_
#if defined(GLES2_BACKEND_DESKTOP_GL)
#include <GL/glew.h>
#if defined(OS_WIN)
#include <GL/wglew.h>
#elif defined(OS_LINUX)
#include <GL/glx.h>
#endif
// Use ARB_shader_object / ARB_vertex_shader functions to work when GL2 isn't
// present but the extensions are.
// Note that several GL2 functions are defined into the same ARB function (e.g.
// glDeleteProgram and glDeleteShader into glDeleteObjectARB). That's expected.
#undef glAttachShader
#define glAttachShader glAttachObjectARB
#undef glCompileShader
#define glCompileShader glCompileShaderARB
#undef glCreateProgram
#define glCreateProgram glCreateProgramObjectARB
#undef glCreateShader
#define glCreateShader glCreateShaderObjectARB
#undef glDeleteProgram
#define glDeleteProgram glDeleteObjectARB
#undef glDeleteShader
#define glDeleteShader glDeleteObjectARB
#undef glDisableVertexAttribArray
#define glDisableVertexAttribArray glDisableVertexAttribArrayARB
#undef glEnableVertexAttribArray
#define glEnableVertexAttribArray glEnableVertexAttribArrayARB
#undef glGetActiveAttrib
#define glGetActiveAttrib glGetActiveAttribARB
#undef glGetActiveUniform
#define glGetActiveUniform glGetActiveUniformARB
#undef glGetAttribLocation
#define glGetAttribLocation glGetAttribLocationARB
#undef glGetProgramInfoLog
#define glGetProgramInfoLog glGetInfoLogARB
#undef glGetProgramiv
#define glGetProgramiv glGetObjectParameterivARB
#undef glGetShaderInfoLog
#define glGetShaderInfoLog glGetInfoLogARB
#undef glGetShaderiv
#define glGetShaderiv glGetObjectParameterivARB
#undef glGetUniformLocation
#define glGetUniformLocation glGetUniformLocationARB
#undef glLinkProgram
#define glLinkProgram glLinkProgramARB
#undef glShaderSource
#define glShaderSource glShaderSourceARB
#undef glUniform1f
#define glUniform1f glUniform1fARB
#undef glUniform1fv
#define glUniform1fv glUniform1fvARB
#undef glUniform1i
#define glUniform1i glUniform1iARB
#undef glUniform1iv
#define glUniform1iv glUniform1ivARB
#undef glUniform2fv
#define glUniform2fv glUniform2fvARB
#undef glUniform3fv
#define glUniform3fv glUniform3fvARB
#undef glUniform4fv
#define glUniform4fv glUniform4fvARB
#undef glUniformMatrix4fv
#define glUniformMatrix4fv glUniformMatrix4fvARB
#undef glUseProgram
#define glUseProgram glUseProgramObjectARB
#undef glVertexAttribPointer
#define glVertexAttribPointer glVertexAttribPointerARB
#elif defined(GLES2_BACKEND_NATIVE_GLES2)
#include <EGL/egl.h>
#include <GLES2/gl2.h>
#include <GLES2/gl2ext.h>
#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 glDeleteRenderbuffersEXT glDeleteRenderbuffers
#define glDeleteFramebuffersEXT glDeleteFramebuffers
#define glFramebufferRenderbufferEXT glFramebufferRenderbuffer
#define glFramebufferTexture2DEXT glFramebufferTexture2D
#define glGenFramebuffersEXT glGenFramebuffers
#define glGenRenderbuffersEXT glGenRenderbuffers
#define glRenderbufferStorageEXT glRenderbufferStorage
#define GLEW_VERSION_2_0 true
#define GLEW_VERSION_1_4 true
// TODO(piman): handle gracefully the case where GL_EXT_bgra isn't present.
#define GL_BGRA 0x80E1
// TODO(piman): handle gracefully the case where GL_OES_half_float isn't
// present.
#define GL_HALF_FLOAT_ARB GL_HALF_FLOAT_OES
#elif defined(GLES2_BACKEND_GLES2_COMMAND_BUFFERS)
#include <GLES2/gl2.h>
#else // GLES2_BACKEND_xxx not defined
#error "GLES2_BACKEND_xxx not defined"
#endif // GLES2_BACKEND_xxx
#endif // O3D_CORE_CROSS_GLES2_GL_HEADERS_H_
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