glfw/src/win32/win32_init.c

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//========================================================================
// GLFW - An OpenGL framework
// Platform: Win32/WGL
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// API version: 3.0
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// 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.
//
//========================================================================
#include "internal.h"
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#include <stdlib.h>
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#ifdef __BORLANDC__
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// With the Borland C++ compiler, we want to disable FPU exceptions
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#include <float.h>
#endif // __BORLANDC__
//========================================================================
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// Load necessary libraries (DLLs)
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//========================================================================
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static GLboolean initLibraries(void)
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{
#ifndef _GLFW_NO_DLOAD_GDI32
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// gdi32.dll (OpenGL pixel format functions & SwapBuffers)
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_glfwLibrary.Win32.gdi.instance = LoadLibrary("gdi32.dll");
if (!_glfwLibrary.Win32.gdi.instance)
return GL_FALSE;
_glfwLibrary.Win32.gdi.ChoosePixelFormat = (CHOOSEPIXELFORMAT_T)
GetProcAddress(_glfwLibrary.Win32.gdi.instance, "ChoosePixelFormat");
_glfwLibrary.Win32.gdi.DescribePixelFormat = (DESCRIBEPIXELFORMAT_T)
GetProcAddress(_glfwLibrary.Win32.gdi.instance, "DescribePixelFormat");
_glfwLibrary.Win32.gdi.GetPixelFormat = (GETPIXELFORMAT_T)
GetProcAddress(_glfwLibrary.Win32.gdi.instance, "GetPixelFormat");
_glfwLibrary.Win32.gdi.SetPixelFormat = (SETPIXELFORMAT_T)
GetProcAddress(_glfwLibrary.Win32.gdi.instance, "SetPixelFormat");
_glfwLibrary.Win32.gdi.SwapBuffers = (SWAPBUFFERS_T)
GetProcAddress(_glfwLibrary.Win32.gdi.instance, "SwapBuffers");
if (!_glfwLibrary.Win32.gdi.ChoosePixelFormat ||
!_glfwLibrary.Win32.gdi.DescribePixelFormat ||
!_glfwLibrary.Win32.gdi.GetPixelFormat ||
!_glfwLibrary.Win32.gdi.SetPixelFormat ||
!_glfwLibrary.Win32.gdi.SwapBuffers)
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{
return GL_FALSE;
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}
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#endif // _GLFW_NO_DLOAD_GDI32
#ifndef _GLFW_NO_DLOAD_WINMM
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// winmm.dll (for joystick and timer support)
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_glfwLibrary.Win32.winmm.instance = LoadLibrary("winmm.dll");
if (!_glfwLibrary.Win32.winmm.instance)
return GL_FALSE;
_glfwLibrary.Win32.winmm.joyGetDevCapsA = (JOYGETDEVCAPSA_T)
GetProcAddress(_glfwLibrary.Win32.winmm.instance, "joyGetDevCapsA");
_glfwLibrary.Win32.winmm.joyGetPos = (JOYGETPOS_T)
GetProcAddress(_glfwLibrary.Win32.winmm.instance, "joyGetPos");
_glfwLibrary.Win32.winmm.joyGetPosEx = (JOYGETPOSEX_T)
GetProcAddress(_glfwLibrary.Win32.winmm.instance, "joyGetPosEx");
_glfwLibrary.Win32.winmm.timeGetTime = (TIMEGETTIME_T)
GetProcAddress(_glfwLibrary.Win32.winmm.instance, "timeGetTime");
if (!_glfwLibrary.Win32.winmm.joyGetDevCapsA ||
!_glfwLibrary.Win32.winmm.joyGetPos ||
!_glfwLibrary.Win32.winmm.joyGetPosEx ||
!_glfwLibrary.Win32.winmm.timeGetTime)
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{
return GL_FALSE;
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}
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#endif // _GLFW_NO_DLOAD_WINMM
return GL_TRUE;
}
//========================================================================
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// Unload used libraries (DLLs)
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//========================================================================
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static void freeLibraries(void)
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{
#ifndef _GLFW_NO_DLOAD_GDI32
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if (_glfwLibrary.Win32.gdi.instance != NULL)
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{
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FreeLibrary(_glfwLibrary.Win32.gdi.instance);
_glfwLibrary.Win32.gdi.instance = NULL;
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}
#endif // _GLFW_NO_DLOAD_GDI32
#ifndef _GLFW_NO_DLOAD_WINMM
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if (_glfwLibrary.Win32.winmm.instance != NULL)
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{
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FreeLibrary(_glfwLibrary.Win32.winmm.instance);
_glfwLibrary.Win32.winmm.instance = NULL;
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}
#endif // _GLFW_NO_DLOAD_WINMM
}
//========================================================================
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// Terminate GLFW when exiting application
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//========================================================================
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static void glfw_atexit(void)
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{
glfwTerminate();
}
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//////////////////////////////////////////////////////////////////////////
////// GLFW platform API //////
//////////////////////////////////////////////////////////////////////////
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//========================================================================
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// Initialize various GLFW state
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//========================================================================
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int _glfwPlatformInit(void)
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{
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// To make SetForegroundWindow work as we want, we need to fiddle
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// with the FOREGROUNDLOCKTIMEOUT system setting (we do this as early
// as possible in the hope of still being the foreground process)
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SystemParametersInfo(SPI_GETFOREGROUNDLOCKTIMEOUT, 0,
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&_glfwLibrary.Win32.foregroundLockTimeout, 0);
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SystemParametersInfo(SPI_SETFOREGROUNDLOCKTIMEOUT, 0, (LPVOID) 0,
SPIF_SENDCHANGE);
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if (!initLibraries())
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return GL_FALSE;
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#ifdef __BORLANDC__
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// With the Borland C++ compiler, we want to disable FPU exceptions
// (this is recommended for OpenGL applications under Windows)
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_control87(MCW_EM, MCW_EM);
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#endif
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_glfwLibrary.Win32.instance = GetModuleHandle(NULL);
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atexit(glfw_atexit);
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_glfwInitTimer();
return GL_TRUE;
}
//========================================================================
// Close window and shut down library
//========================================================================
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int _glfwPlatformTerminate(void)
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{
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if (_glfwLibrary.Win32.classAtom)
{
UnregisterClass(_GLFW_WNDCLASSNAME, _glfwLibrary.Win32.instance);
_glfwLibrary.Win32.classAtom = 0;
}
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// TODO: Remove keyboard hook
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freeLibraries();
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// Restore previous FOREGROUNDLOCKTIMEOUT system setting
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SystemParametersInfo(SPI_SETFOREGROUNDLOCKTIMEOUT, 0,
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(LPVOID) _glfwLibrary.Win32.foregroundLockTimeout,
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SPIF_SENDCHANGE);
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return GL_TRUE;
}
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//========================================================================
// Get the GLFW version string
//========================================================================
const char* _glfwPlatformGetVersionString(void)
{
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// TODO: Add GLFW version somehow
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const char* version = "GLFW "
#if defined(__MINGW32__)
" MinGW"
#elif defined(__CYGWIN__)
" Cygwin"
#elif defined(_MSC_VER)
" Visual C++"
#elif defined(__BORLANDC__)
" Borland C"
#else
" (unknown compiler)"
#endif
#if defined(GLFW_BUILD_DLL)
" DLL"
#endif
#if !defined(_GLFW_NO_DLOAD_GDI32)
" load(gdi32)"
#endif
#if !defined(_GLFW_NO_DLOAD_WINMM)
" load(winmm)"
#endif
;
return version;
}