src/video/wincommon/SDL_wingl.c
author Sam Lantinga <slouken@libsdl.org>
Sun, 16 May 2004 18:02:48 +0000
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ate: Fri, 09 Apr 2004 20:07:10 +0200 From: Hibernatus Subject: [SDL] BUG: changing video mode in opengl + windows In WIN_GL_SetupWindow (SDL12/src/video/wincommon/SDL_wingl.c) you call WIN_GL_ResetWindow when SetPixelFormat fails. WIN_GL_ResetWindow cannot properly work in its current state, because there are several things to update once you've created a new window. At least DirectInput doesn't work anymore here (which is somewhat annoying for the player :). I think you can simply remove that function. Many games don't try to recover from that exception, that's why the newest ATI drivers emulate 16 bpp display in 32 bpp mode so the error never occurs (but the games may run much slower). Having SDL_SetVideoMode return NULL would be better than actually setting the video mode and losing focus, directinput and maybe directsound too. It also made my previous drivers crash (when switching from 32 bpp windowed to 16 bpp fullscreen).
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/*
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    SDL - Simple DirectMedia Layer
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    Copyright (C) 1997-2004 Sam Lantinga
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    This library is free software; you can redistribute it and/or
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    modify it under the terms of the GNU Library General Public
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    License as published by the Free Software Foundation; either
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    version 2 of the License, or (at your option) any later version.
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    This library is distributed in the hope that it will be useful,
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    but WITHOUT ANY WARRANTY; without even the implied warranty of
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    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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    Library General Public License for more details.
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    You should have received a copy of the GNU Library General Public
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    License along with this library; if not, write to the Free
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    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
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    Sam Lantinga
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    slouken@libsdl.org
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*/
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#ifdef SAVE_RCSID
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static char rcsid =
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 "@(#) $Id$";
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#endif
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#include <string.h>
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/* WGL implementation of SDL OpenGL support */
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#ifdef HAVE_OPENGL
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#include "SDL_opengl.h"
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#endif
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#include "SDL_error.h"
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#include "SDL_lowvideo.h"
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#include "SDL_wingl_c.h"
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#ifdef HAVE_OPENGL
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#define DEFAULT_GL_DRIVER_PATH "OPENGL32.DLL"
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#endif
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/* If setting the HDC fails, we may need to recreate the window (MSDN) */
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static int WIN_GL_ResetWindow(_THIS)
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{
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	int status = 0;
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	int can_reset = 1;
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	/* If we were passed a window, then we can't create a new one */
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	if ( SDL_windowid ) {
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		can_reset = 0;
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	}
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#if 0 /* This doesn't work with DirectX code (see CVS comments) */
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#ifndef _WIN32_WCE /* FIXME WinCE needs the UNICODE version of CreateWindow() */
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	if ( can_reset ) {
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		/* Save the existing window attributes */
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		LONG style;
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		RECT rect = { 0, 0, 0, 0 };
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		style = GetWindowLong(SDL_Window, GWL_STYLE);
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		GetWindowRect(SDL_Window, &rect);
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		DestroyWindow(SDL_Window);
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		SDL_Window = CreateWindow(SDL_Appname, SDL_Appname,
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		                          style,
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					  rect.left, rect.top,
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                                          (rect.right-rect.left)+1,
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                                          (rect.top-rect.bottom)+1,
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		                          NULL, NULL, SDL_Instance, NULL);
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		if ( SDL_Window ) {
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			this->SetCaption(this, this->wm_title, this->wm_icon);
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		} else {
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			SDL_SetError("Couldn't create window");
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			status = -1;
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		}
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	} else
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#endif /* !_WIN32_WCE */
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#endif
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	{
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		SDL_SetError("Unable to reset window for OpenGL context");
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		status = -1;
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	}
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	return(status);
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}
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#ifdef HAVE_OPENGL
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static void Init_WGL_ARB_extensions(_THIS)
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{
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	HWND hwnd;
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	HDC hdc;
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	HGLRC hglrc;
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	int pformat;
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	const char * (WINAPI *wglGetExtensionsStringARB)(HDC) = 0;
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	hwnd = CreateWindow(SDL_Appname, SDL_Appname, WS_POPUP | WS_DISABLED,
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	                    0, 0, 10, 10,
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	                    NULL, NULL, SDL_Instance,NULL);
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	hdc = GetDC(hwnd);
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	pformat = ChoosePixelFormat(hdc, &GL_pfd);
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	SetPixelFormat(hdc, pformat, &GL_pfd);
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	hglrc = this->gl_data->wglCreateContext(hdc);
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	if ( hglrc ) {
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		this->gl_data->wglMakeCurrent(hdc, hglrc);
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	}
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	wglGetExtensionsStringARB = (const char * (WINAPI *)(HDC))
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		this->gl_data->wglGetProcAddress("wglGetExtensionsStringARB");
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	if(wglGetExtensionsStringARB && strstr(wglGetExtensionsStringARB(hdc),"WGL_ARB_pixel_format")) {
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		this->gl_data->wglChoosePixelFormatARB =
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			(BOOL (WINAPI *)(HDC, const int *, const FLOAT *, UINT, int *, UINT *))
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			this->gl_data->wglGetProcAddress("wglChoosePixelFormatARB");
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		this->gl_data->wglGetPixelFormatAttribivARB =
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			(BOOL (WINAPI *)(HDC, int, int, UINT, const int *, int *))
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			this->gl_data->wglGetProcAddress("wglGetPixelFormatAttribivARB");
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		if( (this->gl_data->wglChoosePixelFormatARB != NULL) &&
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		    (this->gl_data->wglGetPixelFormatAttribivARB != NULL) )
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			this->gl_data->wgl_arb_pixel_format = 1;
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		else 
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			this->gl_data->wgl_arb_pixel_format = 0;
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	} else {
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		this->gl_data->wgl_arb_pixel_format = 0;
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	}
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	if ( hglrc ) {
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		this->gl_data->wglMakeCurrent(NULL, NULL);
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		this->gl_data->wglDeleteContext(hglrc);
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	}
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	ReleaseDC(hwnd, hdc);
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	DestroyWindow(hwnd);
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   132
}
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#endif /* !HAVE_OPENGL */
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int WIN_GL_SetupWindow(_THIS)
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{
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	int retval;
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#ifdef HAVE_OPENGL
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	int i;
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	unsigned int matching;
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	int iAttribs[64];
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	int *iAttr;
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	float fAttribs[1] = { 0 };
0
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	/* load the gl driver from a default path */
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	if ( ! this->gl_config.driver_loaded ) {
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		/* no driver has been loaded, use default (ourselves) */
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		if ( WIN_GL_LoadLibrary(this, NULL) < 0 ) {
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			return(-1);
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		}
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	}
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	for ( i=0; ; ++i ) {
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		/* Get the window device context for our OpenGL drawing */
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		GL_hdc = GetDC(SDL_Window);
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		if ( GL_hdc == NULL ) {
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			SDL_SetError("Unable to get DC for SDL_Window");
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			return(-1);
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		}
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		/* Set up the pixel format descriptor with our needed format */
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		memset(&GL_pfd, 0, sizeof(GL_pfd));
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		GL_pfd.nSize = sizeof(GL_pfd);
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		GL_pfd.nVersion = 1;
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		GL_pfd.dwFlags = (PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL);
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		if ( this->gl_config.double_buffer ) {
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			GL_pfd.dwFlags |= PFD_DOUBLEBUFFER;
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		}
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		if ( this->gl_config.stereo ) {
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			GL_pfd.dwFlags |= PFD_STEREO;
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		}
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		GL_pfd.iPixelType = PFD_TYPE_RGBA;
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		GL_pfd.cColorBits = this->gl_config.buffer_size;
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		GL_pfd.cRedBits = this->gl_config.red_size;
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		GL_pfd.cGreenBits = this->gl_config.green_size;
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		GL_pfd.cBlueBits = this->gl_config.blue_size;
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		GL_pfd.cAlphaBits = this->gl_config.alpha_size;
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		GL_pfd.cAccumRedBits = this->gl_config.accum_red_size;
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		GL_pfd.cAccumGreenBits = this->gl_config.accum_green_size;
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		GL_pfd.cAccumBlueBits = this->gl_config.accum_blue_size;
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		GL_pfd.cAccumAlphaBits = this->gl_config.accum_alpha_size;
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		GL_pfd.cAccumBits =
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			(GL_pfd.cAccumRedBits + GL_pfd.cAccumGreenBits +
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			 GL_pfd.cAccumBlueBits + GL_pfd.cAccumAlphaBits);
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   185
		GL_pfd.cDepthBits = this->gl_config.depth_size;
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		GL_pfd.cStencilBits = this->gl_config.stencil_size;
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655
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		/* initialize WGL_ARB_pixel_format */
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   189
		Init_WGL_ARB_extensions(this);
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   190
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   191
		/* setup WGL_ARB_pixel_format attribs */
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		iAttr = &iAttribs[0];
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   193
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   194
		*iAttr++ = WGL_DRAW_TO_WINDOW_ARB;
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		*iAttr++ = GL_TRUE;
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		*iAttr++ = WGL_ACCELERATION_ARB;
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		*iAttr++ = WGL_FULL_ACCELERATION_ARB;
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		*iAttr++ = WGL_RED_BITS_ARB;
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		*iAttr++ = this->gl_config.red_size;
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		*iAttr++ = WGL_GREEN_BITS_ARB;
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		*iAttr++ = this->gl_config.green_size;
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		*iAttr++ = WGL_BLUE_BITS_ARB;
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		*iAttr++ = this->gl_config.blue_size;
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   204
		
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   205
		if ( this->gl_config.alpha_size ) {
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   206
			*iAttr++ = WGL_ALPHA_BITS_ARB;
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			*iAttr++ = this->gl_config.alpha_size;
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   208
		}
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   209
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   210
		if ( this->gl_config.double_buffer ) {
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   211
			*iAttr ++ = WGL_DOUBLE_BUFFER_ARB;
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   212
			*iAttr ++ = GL_TRUE;
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   213
		}
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   214
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   215
		*iAttr++ = WGL_DEPTH_BITS_ARB;
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   216
		*iAttr++ = this->gl_config.depth_size;
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   217
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   218
		if ( this->gl_config.stencil_size ) {
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   219
			*iAttr++ = WGL_STENCIL_BITS_ARB;
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   220
			*iAttr++ = this->gl_config.stencil_size;
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   221
		}
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   222
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   223
		if ( this->gl_config.accum_red_size ) {
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   224
			*iAttr++ = WGL_ACCUM_RED_BITS_ARB;
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   225
			*iAttr++ = this->gl_config.accum_red_size;
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   226
		}
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   227
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   228
		if ( this->gl_config.accum_green_size ) {
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   229
			*iAttr++ = WGL_ACCUM_GREEN_BITS_ARB;
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   230
			*iAttr++ = this->gl_config.accum_green_size;
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   231
		}
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   232
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   233
		if ( this->gl_config.accum_blue_size ) {
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   234
			*iAttr++ = WGL_ACCUM_BLUE_BITS_ARB;
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   235
			*iAttr++ = this->gl_config.accum_blue_size;
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   236
		}
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   237
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   238
		if ( this->gl_config.accum_alpha_size ) {
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diff changeset
   239
			*iAttr++ = WGL_ACCUM_ALPHA_BITS_ARB;
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
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   240
			*iAttr++ = this->gl_config.accum_alpha_size;
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diff changeset
   241
		}
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   242
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
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diff changeset
   243
		if ( this->gl_config.stereo ) {
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
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diff changeset
   244
			*iAttr++ = WGL_STEREO_ARB;
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diff changeset
   245
			*iAttr++ = this->gl_config.stereo;
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
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diff changeset
   246
		}
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
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diff changeset
   247
656
864e2d2a9a55 Merged in Ryan's multisample code for MacOS, and changed the constants to match.
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   248
		if ( this->gl_config.multisamplebuffers ) {
655
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diff changeset
   249
			*iAttr++ = WGL_SAMPLE_BUFFERS_ARB;
656
864e2d2a9a55 Merged in Ryan's multisample code for MacOS, and changed the constants to match.
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   250
			*iAttr++ = this->gl_config.multisamplebuffers;
655
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   251
		}
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
Sam Lantinga <slouken@libsdl.org>
parents: 453
diff changeset
   252
656
864e2d2a9a55 Merged in Ryan's multisample code for MacOS, and changed the constants to match.
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diff changeset
   253
		if ( this->gl_config.multisamplesamples ) {
655
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
Sam Lantinga <slouken@libsdl.org>
parents: 453
diff changeset
   254
			*iAttr++ = WGL_SAMPLES_ARB;
656
864e2d2a9a55 Merged in Ryan's multisample code for MacOS, and changed the constants to match.
Sam Lantinga <slouken@libsdl.org>
parents: 655
diff changeset
   255
			*iAttr++ = this->gl_config.multisamplesamples;
655
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
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parents: 453
diff changeset
   256
		}
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
Sam Lantinga <slouken@libsdl.org>
parents: 453
diff changeset
   257
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
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parents: 453
diff changeset
   258
		*iAttr = 0;
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
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parents: 453
diff changeset
   259
373
c638fde8a824 Fixed setting OpenGL mode multiple times on Windows
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diff changeset
   260
		/* Choose and set the closest available pixel format */
655
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
Sam Lantinga <slouken@libsdl.org>
parents: 453
diff changeset
   261
		if ( !this->gl_data->wgl_arb_pixel_format ||
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
Sam Lantinga <slouken@libsdl.org>
parents: 453
diff changeset
   262
		     !this->gl_data->wglChoosePixelFormatARB(GL_hdc, iAttribs, fAttribs, 1, &pixel_format, &matching) ||
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
Sam Lantinga <slouken@libsdl.org>
parents: 453
diff changeset
   263
		     !matching ) {
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
Sam Lantinga <slouken@libsdl.org>
parents: 453
diff changeset
   264
			pixel_format = ChoosePixelFormat(GL_hdc, &GL_pfd);
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
Sam Lantinga <slouken@libsdl.org>
parents: 453
diff changeset
   265
			this->gl_data->wgl_arb_pixel_format = 0;
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
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parents: 453
diff changeset
   266
		}
373
c638fde8a824 Fixed setting OpenGL mode multiple times on Windows
Sam Lantinga <slouken@libsdl.org>
parents: 327
diff changeset
   267
		if ( !pixel_format ) {
c638fde8a824 Fixed setting OpenGL mode multiple times on Windows
Sam Lantinga <slouken@libsdl.org>
parents: 327
diff changeset
   268
			SDL_SetError("No matching GL pixel format available");
c638fde8a824 Fixed setting OpenGL mode multiple times on Windows
Sam Lantinga <slouken@libsdl.org>
parents: 327
diff changeset
   269
			return(-1);
c638fde8a824 Fixed setting OpenGL mode multiple times on Windows
Sam Lantinga <slouken@libsdl.org>
parents: 327
diff changeset
   270
		}
655
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
Sam Lantinga <slouken@libsdl.org>
parents: 453
diff changeset
   271
		if ( !SetPixelFormat(GL_hdc, pixel_format, &GL_pfd) ) {
373
c638fde8a824 Fixed setting OpenGL mode multiple times on Windows
Sam Lantinga <slouken@libsdl.org>
parents: 327
diff changeset
   272
			if ( i == 0 ) {
c638fde8a824 Fixed setting OpenGL mode multiple times on Windows
Sam Lantinga <slouken@libsdl.org>
parents: 327
diff changeset
   273
				/* First time through, try resetting the window */
c638fde8a824 Fixed setting OpenGL mode multiple times on Windows
Sam Lantinga <slouken@libsdl.org>
parents: 327
diff changeset
   274
				if ( WIN_GL_ResetWindow(this) < 0 ) {
c638fde8a824 Fixed setting OpenGL mode multiple times on Windows
Sam Lantinga <slouken@libsdl.org>
parents: 327
diff changeset
   275
					return(-1);
c638fde8a824 Fixed setting OpenGL mode multiple times on Windows
Sam Lantinga <slouken@libsdl.org>
parents: 327
diff changeset
   276
				}
c638fde8a824 Fixed setting OpenGL mode multiple times on Windows
Sam Lantinga <slouken@libsdl.org>
parents: 327
diff changeset
   277
				continue;
c638fde8a824 Fixed setting OpenGL mode multiple times on Windows
Sam Lantinga <slouken@libsdl.org>
parents: 327
diff changeset
   278
			}
c638fde8a824 Fixed setting OpenGL mode multiple times on Windows
Sam Lantinga <slouken@libsdl.org>
parents: 327
diff changeset
   279
			SDL_SetError("Unable to set HDC pixel format");
c638fde8a824 Fixed setting OpenGL mode multiple times on Windows
Sam Lantinga <slouken@libsdl.org>
parents: 327
diff changeset
   280
			return(-1);
c638fde8a824 Fixed setting OpenGL mode multiple times on Windows
Sam Lantinga <slouken@libsdl.org>
parents: 327
diff changeset
   281
		}
c638fde8a824 Fixed setting OpenGL mode multiple times on Windows
Sam Lantinga <slouken@libsdl.org>
parents: 327
diff changeset
   282
		/* We either succeeded or failed by this point */
c638fde8a824 Fixed setting OpenGL mode multiple times on Windows
Sam Lantinga <slouken@libsdl.org>
parents: 327
diff changeset
   283
		break;
0
74212992fb08 Initial revision
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parents:
diff changeset
   284
	}
74212992fb08 Initial revision
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parents:
diff changeset
   285
	DescribePixelFormat(GL_hdc, pixel_format, sizeof(GL_pfd), &GL_pfd);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   286
74212992fb08 Initial revision
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parents:
diff changeset
   287
	GL_hrc = this->gl_data->wglCreateContext(GL_hdc);
655
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
Sam Lantinga <slouken@libsdl.org>
parents: 453
diff changeset
   288
	if ( GL_hrc == NULL ) {
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   289
		SDL_SetError("Unable to create GL context");
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   290
		return(-1);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   291
	}
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   292
	gl_active = 1;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   293
#else
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   294
	SDL_SetError("WIN driver not configured with OpenGL");
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   295
#endif
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   296
	if ( gl_active ) {
74212992fb08 Initial revision
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parents:
diff changeset
   297
		retval = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   298
	} else {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   299
		retval = -1;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   300
	}
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   301
	return(retval);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   302
}
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   303
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   304
void WIN_GL_ShutDown(_THIS)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   305
{
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   306
#ifdef HAVE_OPENGL
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   307
	/* Clean up OpenGL */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   308
	if ( GL_hrc ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   309
		this->gl_data->wglMakeCurrent(NULL, NULL);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   310
		this->gl_data->wglDeleteContext(GL_hrc);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   311
		GL_hrc = NULL;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   312
	}
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   313
	if ( GL_hdc ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   314
		ReleaseDC(SDL_Window, GL_hdc);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   315
		GL_hdc = NULL;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   316
	}
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   317
	gl_active = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   318
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   319
	WIN_GL_UnloadLibrary(this);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   320
#endif /* HAVE_OPENGL */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   321
}
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   322
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   323
#ifdef HAVE_OPENGL
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   324
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   325
/* Make the current context active */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   326
int WIN_GL_MakeCurrent(_THIS)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   327
{
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   328
	int retval;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   329
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   330
	retval = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   331
	if ( ! this->gl_data->wglMakeCurrent(GL_hdc, GL_hrc) ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   332
		SDL_SetError("Unable to make GL context current");
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   333
		retval = -1;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   334
	}
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   335
	return(retval);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   336
}
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   337
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   338
/* Get attribute data from glX. */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   339
int WIN_GL_GetAttribute(_THIS, SDL_GLattr attrib, int* value)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   340
{
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   341
	int retval;
655
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
Sam Lantinga <slouken@libsdl.org>
parents: 453
diff changeset
   342
	
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
Sam Lantinga <slouken@libsdl.org>
parents: 453
diff changeset
   343
	if ( this->gl_data->wgl_arb_pixel_format ) {
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
Sam Lantinga <slouken@libsdl.org>
parents: 453
diff changeset
   344
		int wgl_attrib;
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
Sam Lantinga <slouken@libsdl.org>
parents: 453
diff changeset
   345
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
Sam Lantinga <slouken@libsdl.org>
parents: 453
diff changeset
   346
		switch(attrib) {
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
Sam Lantinga <slouken@libsdl.org>
parents: 453
diff changeset
   347
		    case SDL_GL_RED_SIZE:
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
Sam Lantinga <slouken@libsdl.org>
parents: 453
diff changeset
   348
			wgl_attrib = WGL_RED_BITS_ARB;
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
Sam Lantinga <slouken@libsdl.org>
parents: 453
diff changeset
   349
			break;
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
Sam Lantinga <slouken@libsdl.org>
parents: 453
diff changeset
   350
		    case SDL_GL_GREEN_SIZE:
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
Sam Lantinga <slouken@libsdl.org>
parents: 453
diff changeset
   351
			wgl_attrib = WGL_GREEN_BITS_ARB;
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
Sam Lantinga <slouken@libsdl.org>
parents: 453
diff changeset
   352
			break;
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
Sam Lantinga <slouken@libsdl.org>
parents: 453
diff changeset
   353
		    case SDL_GL_BLUE_SIZE:
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
Sam Lantinga <slouken@libsdl.org>
parents: 453
diff changeset
   354
			wgl_attrib = WGL_BLUE_BITS_ARB;
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
Sam Lantinga <slouken@libsdl.org>
parents: 453
diff changeset
   355
			break;
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
Sam Lantinga <slouken@libsdl.org>
parents: 453
diff changeset
   356
		    case SDL_GL_ALPHA_SIZE:
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
Sam Lantinga <slouken@libsdl.org>
parents: 453
diff changeset
   357
			wgl_attrib = WGL_ALPHA_BITS_ARB;
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
Sam Lantinga <slouken@libsdl.org>
parents: 453
diff changeset
   358
			break;
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
Sam Lantinga <slouken@libsdl.org>
parents: 453
diff changeset
   359
		    case SDL_GL_DOUBLEBUFFER:
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
Sam Lantinga <slouken@libsdl.org>
parents: 453
diff changeset
   360
			wgl_attrib = WGL_DOUBLE_BUFFER_ARB;
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
Sam Lantinga <slouken@libsdl.org>
parents: 453
diff changeset
   361
			break;
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
Sam Lantinga <slouken@libsdl.org>
parents: 453
diff changeset
   362
		    case SDL_GL_BUFFER_SIZE:
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
Sam Lantinga <slouken@libsdl.org>
parents: 453
diff changeset
   363
			wgl_attrib = WGL_COLOR_BITS_ARB;
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
Sam Lantinga <slouken@libsdl.org>
parents: 453
diff changeset
   364
			break;
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
Sam Lantinga <slouken@libsdl.org>
parents: 453
diff changeset
   365
		    case SDL_GL_DEPTH_SIZE:
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
Sam Lantinga <slouken@libsdl.org>
parents: 453
diff changeset
   366
			wgl_attrib = WGL_DEPTH_BITS_ARB;
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
Sam Lantinga <slouken@libsdl.org>
parents: 453
diff changeset
   367
			break;
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
Sam Lantinga <slouken@libsdl.org>
parents: 453
diff changeset
   368
		    case SDL_GL_STENCIL_SIZE:
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
Sam Lantinga <slouken@libsdl.org>
parents: 453
diff changeset
   369
			wgl_attrib = WGL_STENCIL_BITS_ARB;
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
Sam Lantinga <slouken@libsdl.org>
parents: 453
diff changeset
   370
			break;
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
Sam Lantinga <slouken@libsdl.org>
parents: 453
diff changeset
   371
		    case SDL_GL_ACCUM_RED_SIZE:
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
Sam Lantinga <slouken@libsdl.org>
parents: 453
diff changeset
   372
			wgl_attrib = WGL_ACCUM_RED_BITS_ARB;
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
Sam Lantinga <slouken@libsdl.org>
parents: 453
diff changeset
   373
			break;
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
Sam Lantinga <slouken@libsdl.org>
parents: 453
diff changeset
   374
		    case SDL_GL_ACCUM_GREEN_SIZE:
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
Sam Lantinga <slouken@libsdl.org>
parents: 453
diff changeset
   375
			wgl_attrib = WGL_ACCUM_GREEN_BITS_ARB;
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
Sam Lantinga <slouken@libsdl.org>
parents: 453
diff changeset
   376
			break;
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
Sam Lantinga <slouken@libsdl.org>
parents: 453
diff changeset
   377
		    case SDL_GL_ACCUM_BLUE_SIZE:
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
Sam Lantinga <slouken@libsdl.org>
parents: 453
diff changeset
   378
			wgl_attrib = WGL_ACCUM_BLUE_BITS_ARB;
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
Sam Lantinga <slouken@libsdl.org>
parents: 453
diff changeset
   379
			break;
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
Sam Lantinga <slouken@libsdl.org>
parents: 453
diff changeset
   380
		    case SDL_GL_ACCUM_ALPHA_SIZE:
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
Sam Lantinga <slouken@libsdl.org>
parents: 453
diff changeset
   381
			wgl_attrib = WGL_ACCUM_ALPHA_BITS_ARB;
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
Sam Lantinga <slouken@libsdl.org>
parents: 453
diff changeset
   382
			break;
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
Sam Lantinga <slouken@libsdl.org>
parents: 453
diff changeset
   383
		    case SDL_GL_STEREO:
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
Sam Lantinga <slouken@libsdl.org>
parents: 453
diff changeset
   384
			wgl_attrib = WGL_STEREO_ARB;
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
Sam Lantinga <slouken@libsdl.org>
parents: 453
diff changeset
   385
			break;
656
864e2d2a9a55 Merged in Ryan's multisample code for MacOS, and changed the constants to match.
Sam Lantinga <slouken@libsdl.org>
parents: 655
diff changeset
   386
		    case SDL_GL_MULTISAMPLEBUFFERS:
655
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
Sam Lantinga <slouken@libsdl.org>
parents: 453
diff changeset
   387
			wgl_attrib = WGL_SAMPLE_BUFFERS_ARB;
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
Sam Lantinga <slouken@libsdl.org>
parents: 453
diff changeset
   388
			break;
656
864e2d2a9a55 Merged in Ryan's multisample code for MacOS, and changed the constants to match.
Sam Lantinga <slouken@libsdl.org>
parents: 655
diff changeset
   389
		    case SDL_GL_MULTISAMPLESAMPLES:
655
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
Sam Lantinga <slouken@libsdl.org>
parents: 453
diff changeset
   390
			wgl_attrib = WGL_SAMPLES_ARB;
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
Sam Lantinga <slouken@libsdl.org>
parents: 453
diff changeset
   391
			break;
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
Sam Lantinga <slouken@libsdl.org>
parents: 453
diff changeset
   392
		    default:
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
Sam Lantinga <slouken@libsdl.org>
parents: 453
diff changeset
   393
			return(-1);
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
Sam Lantinga <slouken@libsdl.org>
parents: 453
diff changeset
   394
		}
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
Sam Lantinga <slouken@libsdl.org>
parents: 453
diff changeset
   395
		this->gl_data->wglGetPixelFormatAttribivARB(GL_hdc, pixel_format, 0, 1, &wgl_attrib, value);
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
Sam Lantinga <slouken@libsdl.org>
parents: 453
diff changeset
   396
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
Sam Lantinga <slouken@libsdl.org>
parents: 453
diff changeset
   397
		return 0;
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
Sam Lantinga <slouken@libsdl.org>
parents: 453
diff changeset
   398
	}
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   399
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   400
	retval = 0;
655
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
Sam Lantinga <slouken@libsdl.org>
parents: 453
diff changeset
   401
	switch ( attrib ) {
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   402
	    case SDL_GL_RED_SIZE:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   403
		*value = GL_pfd.cRedBits;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   404
		break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   405
	    case SDL_GL_GREEN_SIZE:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   406
		*value = GL_pfd.cGreenBits;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   407
		break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   408
	    case SDL_GL_BLUE_SIZE:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   409
		*value = GL_pfd.cBlueBits;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   410
		break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   411
	    case SDL_GL_ALPHA_SIZE:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   412
		*value = GL_pfd.cAlphaBits;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   413
		break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   414
	    case SDL_GL_DOUBLEBUFFER:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   415
		if ( GL_pfd.dwFlags & PFD_DOUBLEBUFFER ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   416
			*value = 1;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   417
		} else {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   418
			*value = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   419
		}
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   420
		break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   421
	    case SDL_GL_BUFFER_SIZE:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   422
		*value = GL_pfd.cColorBits;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   423
		break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   424
	    case SDL_GL_DEPTH_SIZE:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   425
		*value = GL_pfd.cDepthBits;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   426
		break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   427
	    case SDL_GL_STENCIL_SIZE:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   428
		*value = GL_pfd.cStencilBits;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   429
		break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   430
	    case SDL_GL_ACCUM_RED_SIZE:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   431
		*value = GL_pfd.cAccumRedBits;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   432
		break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   433
	    case SDL_GL_ACCUM_GREEN_SIZE:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   434
		*value = GL_pfd.cAccumGreenBits;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   435
		break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   436
	    case SDL_GL_ACCUM_BLUE_SIZE:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   437
		*value = GL_pfd.cAccumBlueBits;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   438
		break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   439
	    case SDL_GL_ACCUM_ALPHA_SIZE:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   440
		*value = GL_pfd.cAccumAlphaBits;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   441
		break;
450
8a43e0cbf02f Added SDL_GL_STEREO for stereoscopic OpenGL contexts
Sam Lantinga <slouken@libsdl.org>
parents: 373
diff changeset
   442
	    case SDL_GL_STEREO:
8a43e0cbf02f Added SDL_GL_STEREO for stereoscopic OpenGL contexts
Sam Lantinga <slouken@libsdl.org>
parents: 373
diff changeset
   443
		if ( GL_pfd.dwFlags & PFD_STEREO ) {
8a43e0cbf02f Added SDL_GL_STEREO for stereoscopic OpenGL contexts
Sam Lantinga <slouken@libsdl.org>
parents: 373
diff changeset
   444
			*value = 1;
8a43e0cbf02f Added SDL_GL_STEREO for stereoscopic OpenGL contexts
Sam Lantinga <slouken@libsdl.org>
parents: 373
diff changeset
   445
		} else {
8a43e0cbf02f Added SDL_GL_STEREO for stereoscopic OpenGL contexts
Sam Lantinga <slouken@libsdl.org>
parents: 373
diff changeset
   446
			*value = 0;
8a43e0cbf02f Added SDL_GL_STEREO for stereoscopic OpenGL contexts
Sam Lantinga <slouken@libsdl.org>
parents: 373
diff changeset
   447
		}
8a43e0cbf02f Added SDL_GL_STEREO for stereoscopic OpenGL contexts
Sam Lantinga <slouken@libsdl.org>
parents: 373
diff changeset
   448
		break;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   449
	    default:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   450
		retval = -1;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   451
		break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   452
	}
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   453
	return retval;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   454
}
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   455
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   456
void WIN_GL_SwapBuffers(_THIS)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   457
{
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   458
	SwapBuffers(GL_hdc);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   459
}
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   460
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   461
void WIN_GL_UnloadLibrary(_THIS)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   462
{
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   463
	if ( this->gl_config.driver_loaded ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   464
		FreeLibrary((HMODULE)this->gl_config.dll_handle);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   465
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   466
		this->gl_data->wglGetProcAddress = NULL;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   467
		this->gl_data->wglCreateContext = NULL;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   468
		this->gl_data->wglDeleteContext = NULL;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   469
		this->gl_data->wglMakeCurrent = NULL;
655
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
Sam Lantinga <slouken@libsdl.org>
parents: 453
diff changeset
   470
		this->gl_data->wglChoosePixelFormatARB = NULL;
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
Sam Lantinga <slouken@libsdl.org>
parents: 453
diff changeset
   471
		this->gl_data->wglGetPixelFormatAttribivARB = NULL;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   472
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   473
		this->gl_config.dll_handle = NULL;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   474
		this->gl_config.driver_loaded = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   475
	}
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   476
}
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   477
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   478
/* Passing a NULL path means load pointers from the application */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   479
int WIN_GL_LoadLibrary(_THIS, const char* path) 
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   480
{
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   481
	HMODULE handle;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   482
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   483
 	if ( gl_active ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   484
 		SDL_SetError("OpenGL context already created");
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   485
 		return -1;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   486
 	}
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   487
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   488
	if ( path == NULL ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   489
		path = DEFAULT_GL_DRIVER_PATH;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   490
	}
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   491
	handle = LoadLibrary(path);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   492
	if ( handle == NULL ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   493
		SDL_SetError("Could not load OpenGL library");
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   494
		return -1;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   495
	}
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   496
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   497
	/* Unload the old driver and reset the pointers */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   498
	WIN_GL_UnloadLibrary(this);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   499
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   500
	/* Load new function pointers */
655
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
Sam Lantinga <slouken@libsdl.org>
parents: 453
diff changeset
   501
	memset(this->gl_data, 0, sizeof(*this->gl_data));
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   502
	this->gl_data->wglGetProcAddress = (void * (WINAPI *)(const char *))
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   503
		GetProcAddress(handle, "wglGetProcAddress");
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   504
	this->gl_data->wglCreateContext = (HGLRC (WINAPI *)(HDC))
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   505
		GetProcAddress(handle, "wglCreateContext");
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   506
	this->gl_data->wglDeleteContext = (BOOL (WINAPI *)(HGLRC))
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   507
		GetProcAddress(handle, "wglDeleteContext");
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   508
	this->gl_data->wglMakeCurrent = (BOOL (WINAPI *)(HDC, HGLRC))
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   509
		GetProcAddress(handle, "wglMakeCurrent");
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   510
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   511
	if ( (this->gl_data->wglGetProcAddress == NULL) ||
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   512
	     (this->gl_data->wglCreateContext == NULL) ||
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   513
	     (this->gl_data->wglDeleteContext == NULL) ||
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   514
	     (this->gl_data->wglMakeCurrent == NULL) ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   515
		SDL_SetError("Could not retrieve OpenGL functions");
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   516
		FreeLibrary(handle);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   517
		return -1;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   518
	}
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   519
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   520
	this->gl_config.dll_handle = handle;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   521
	strcpy(this->gl_config.driver_path, path);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   522
	this->gl_config.driver_loaded = 1;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   523
	return 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   524
}
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   525
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   526
void *WIN_GL_GetProcAddress(_THIS, const char* proc)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   527
{
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   528
	void *func;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   529
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   530
	/* This is to pick up extensions */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   531
	func = this->gl_data->wglGetProcAddress(proc);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   532
	if ( ! func ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   533
		/* This is probably a normal GL function */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   534
		func = GetProcAddress(this->gl_config.dll_handle, proc);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   535
	}
74212992fb08 Initial revision
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	return func;
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}
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   538
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   539
#endif /* HAVE_OPENGL */