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init.c
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init.c
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//========================================================================
// GLFW - An OpenGL library
// Platform: Any
// API version: 3.0
// WWW: http://www.glfw.org/
//------------------------------------------------------------------------
// Copyright (c) 2002-2006 Marcus Geelnard
// Copyright (c) 2006-2010 Camilla Berglund <elmindreda@elmindreda.org>
//
// This software is provided 'as-is', without any express or implied
// warranty. In no event will the authors be held liable for any damages
// arising from the use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it
// freely, subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented; you must not
// claim that you wrote the original software. If you use this software
// in a product, an acknowledgment in the product documentation would
// be appreciated but is not required.
//
// 2. Altered source versions must be plainly marked as such, and must not
// be misrepresented as being the original software.
//
// 3. This notice may not be removed or altered from any source
// distribution.
//
//========================================================================
#define _init_c_
#include "internal.h"
#include <string.h>
#include <stdlib.h>
//========================================================================
// Terminate GLFW when exiting application
//========================================================================
static void glfw_atexit(void)
{
glfwTerminate();
}
//////////////////////////////////////////////////////////////////////////
////// GLFW internal API //////
//////////////////////////////////////////////////////////////////////////
//========================================================================
// Allocate memory using the allocator
//========================================================================
void* _glfwMalloc(size_t size)
{
return _glfwLibrary.allocator.malloc(size);
}
//========================================================================
// Free memory using the allocator
//========================================================================
void _glfwFree(void* ptr)
{
_glfwLibrary.allocator.free(ptr);
}
//////////////////////////////////////////////////////////////////////////
////// GLFW public API //////
//////////////////////////////////////////////////////////////////////////
//========================================================================
// Initialize various GLFW state
//========================================================================
GLFWAPI int glfwInit(void)
{
return glfwInitWithModels(NULL, NULL);
}
//========================================================================
// Initialize various GLFW state using custom model interfaces
//========================================================================
GLFWAPI int glfwInitWithModels(GLFWthreadmodel* threading, GLFWallocator* allocator)
{
if (_glfwInitialized)
return GL_TRUE;
memset(&_glfwLibrary, 0, sizeof(_glfwLibrary));
if (threading)
_glfwLibrary.threading = *threading;
if (allocator)
{
// Verify that the specified model is complete
if (!allocator->malloc || !allocator->free)
{
_glfwSetError(GLFW_INVALID_VALUE, NULL);
return GL_FALSE;
}
_glfwLibrary.allocator = *allocator;
}
else
{
// Use the libc malloc and free
_glfwLibrary.allocator.malloc = malloc;
_glfwLibrary.allocator.free = free;
}
// Not all window hints are cleared to zero, so this needs to be here
// despite the memset above
_glfwClearWindowHints();
if (!_glfwPlatformInit())
{
_glfwPlatformTerminate();
return GL_FALSE;
}
atexit(glfw_atexit);
_glfwInitialized = GL_TRUE;
return GL_TRUE;
}
//========================================================================
// Close window and shut down library
//========================================================================
GLFWAPI void glfwTerminate(void)
{
if (!_glfwInitialized)
return;
// Close all remaining windows
while (_glfwLibrary.windowListHead)
glfwCloseWindow(_glfwLibrary.windowListHead);
if (!_glfwPlatformTerminate())
return;
_glfwInitialized = GL_FALSE;
}
//========================================================================
// Get GLFW version
//========================================================================
GLFWAPI void glfwGetVersion(int* major, int* minor, int* rev)
{
if (major != NULL)
*major = GLFW_VERSION_MAJOR;
if (minor != NULL)
*minor = GLFW_VERSION_MINOR;
if (rev != NULL)
*rev = GLFW_VERSION_REVISION;
}
//========================================================================
// Get the GLFW version string
//========================================================================
GLFWAPI const char* glfwGetVersionString(void)
{
return _glfwPlatformGetVersionString();
}