285 lines
8.7 KiB
C
285 lines
8.7 KiB
C
/*
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* OpenGL function forwarding to the display driver
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*
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* Copyright (c) 1999 Lionel Ulmer
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* Copyright (c) 2005 Raphael Junqueira
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* Copyright (c) 2006 Roderick Colenbrander
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*
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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 Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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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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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#include "config.h"
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#include "wine/port.h"
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#include <stdarg.h>
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#include <string.h>
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#include <stdlib.h>
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#include "windef.h"
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#include "winbase.h"
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#include "wingdi.h"
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#include "winerror.h"
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#include "winternl.h"
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#include "winnt.h"
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#include "gdi_private.h"
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#include "wine/debug.h"
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WINE_DEFAULT_DEBUG_CHANNEL(wgl);
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static const WCHAR opengl32W[] = {'o','p','e','n','g','l','3','2','.','d','l','l',0};
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static HMODULE opengl32;
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static INT (WINAPI *wglChoosePixelFormat)(HDC,const PIXELFORMATDESCRIPTOR *);
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static INT (WINAPI *wglDescribePixelFormat)(HDC,INT,UINT,PIXELFORMATDESCRIPTOR*);
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static BOOL (WINAPI *wglSetPixelFormat)(HDC,INT,const PIXELFORMATDESCRIPTOR*);
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static BOOL (WINAPI *wglSwapBuffers)(HDC);
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static HDC default_hdc = 0;
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/* We route all wgl functions from opengl32.dll through gdi32.dll to
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* the display driver. Various wgl calls have a hDC as one of their parameters.
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* Using get_dc_ptr we get access to the functions exported by the driver.
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* Some functions don't receive a hDC. This function creates a global hdc and
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* if there's already a global hdc, it returns it.
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*/
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static DC* OPENGL_GetDefaultDC(void)
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{
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if(!default_hdc)
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default_hdc = CreateDCA("DISPLAY", NULL, NULL, NULL);
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return get_dc_ptr(default_hdc);
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}
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/***********************************************************************
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* wglCreateContext (OPENGL32.@)
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*/
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HGLRC WINAPI wglCreateContext(HDC hdc)
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{
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HGLRC ret = 0;
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DC * dc = get_dc_ptr( hdc );
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TRACE("(%p)\n",hdc);
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if (dc)
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{
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PHYSDEV physdev = GET_DC_PHYSDEV( dc, pwglCreateContext );
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update_dc( dc );
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ret = physdev->funcs->pwglCreateContext( physdev );
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release_dc_ptr( dc );
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}
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return ret;
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}
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/***********************************************************************
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* wglCreateContextAttribsARB
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*/
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static HGLRC WINAPI wglCreateContextAttribsARB(HDC hdc, HGLRC hShareContext, const int *attributeList)
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{
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HGLRC ret = 0;
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DC * dc = get_dc_ptr( hdc );
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TRACE("(%p)\n",hdc);
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if (dc)
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{
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PHYSDEV physdev = GET_DC_PHYSDEV( dc, pwglCreateContextAttribsARB );
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update_dc( dc );
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ret = physdev->funcs->pwglCreateContextAttribsARB( physdev, hShareContext, attributeList );
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release_dc_ptr( dc );
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}
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return ret;
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}
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/***********************************************************************
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* wglMakeCurrent (OPENGL32.@)
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*/
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BOOL WINAPI wglMakeCurrent(HDC hdc, HGLRC hglrc)
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{
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BOOL ret = FALSE;
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DC * dc = NULL;
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/* When the context hglrc is NULL, the HDC is ignored and can be NULL.
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* In that case use the global hDC to get access to the driver. */
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if(hglrc == NULL)
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{
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if (hdc == NULL && !NtCurrentTeb()->glContext)
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{
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WARN( "Current context is NULL\n");
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SetLastError( ERROR_INVALID_HANDLE );
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return FALSE;
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}
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dc = OPENGL_GetDefaultDC();
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}
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else
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dc = get_dc_ptr( hdc );
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TRACE("hdc: (%p), hglrc: (%p)\n", hdc, hglrc);
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if (dc)
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{
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PHYSDEV physdev = GET_DC_PHYSDEV( dc, pwglMakeCurrent );
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update_dc( dc );
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ret = physdev->funcs->pwglMakeCurrent( physdev, hglrc );
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release_dc_ptr( dc );
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}
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return ret;
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}
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/***********************************************************************
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* wglMakeContextCurrentARB
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*/
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static BOOL WINAPI wglMakeContextCurrentARB(HDC hDrawDC, HDC hReadDC, HGLRC hglrc)
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{
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BOOL ret = FALSE;
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PHYSDEV draw_physdev, read_physdev;
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DC *DrawDC;
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DC *ReadDC;
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TRACE("hDrawDC: (%p), hReadDC: (%p) hglrc: (%p)\n", hDrawDC, hReadDC, hglrc);
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/* Both hDrawDC and hReadDC need to be valid */
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DrawDC = get_dc_ptr( hDrawDC );
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if (!DrawDC) return FALSE;
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ReadDC = get_dc_ptr( hReadDC );
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if (!ReadDC) {
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release_dc_ptr( DrawDC );
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return FALSE;
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}
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update_dc( DrawDC );
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update_dc( ReadDC );
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draw_physdev = GET_DC_PHYSDEV( DrawDC, pwglMakeContextCurrentARB );
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read_physdev = GET_DC_PHYSDEV( ReadDC, pwglMakeContextCurrentARB );
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if (draw_physdev->funcs == read_physdev->funcs)
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ret = draw_physdev->funcs->pwglMakeContextCurrentARB(draw_physdev, read_physdev, hglrc);
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release_dc_ptr( DrawDC );
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release_dc_ptr( ReadDC );
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return ret;
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}
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/**************************************************************************************
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* WINE-specific wglSetPixelFormat which can set the iPixelFormat multiple times
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*
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*/
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static BOOL WINAPI wglSetPixelFormatWINE(HDC hdc, int iPixelFormat, const PIXELFORMATDESCRIPTOR *ppfd)
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{
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INT bRet = FALSE;
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DC * dc = get_dc_ptr( hdc );
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TRACE("(%p,%d,%p)\n", hdc, iPixelFormat, ppfd);
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if (dc)
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{
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PHYSDEV physdev = GET_DC_PHYSDEV( dc, pwglSetPixelFormatWINE );
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update_dc( dc );
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bRet = physdev->funcs->pwglSetPixelFormatWINE( physdev, iPixelFormat, ppfd );
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release_dc_ptr( dc );
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}
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return bRet;
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}
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/***********************************************************************
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* Internal wglGetProcAddress for retrieving WGL extensions
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*/
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PROC WINAPI wglGetProcAddress(LPCSTR func)
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{
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PROC ret = NULL;
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DC *dc;
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if(!func)
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return NULL;
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TRACE("func: '%s'\n", func);
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/* Retrieve the global hDC to get access to the driver. */
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dc = OPENGL_GetDefaultDC();
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if (dc)
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{
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PHYSDEV physdev = GET_DC_PHYSDEV( dc, pwglGetProcAddress );
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ret = physdev->funcs->pwglGetProcAddress(func);
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release_dc_ptr( dc );
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}
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/* At the moment we implement one WGL extension which requires a HDC. When we
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* are looking up this call and when the Extension is available (that is the case
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* when a non-NULL value is returned by wglGetProcAddress), we return the address
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* of a wrapper function which will handle the HDC->PhysDev conversion.
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*/
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if(ret && strcmp(func, "wglCreateContextAttribsARB") == 0)
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return (PROC)wglCreateContextAttribsARB;
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else if(ret && strcmp(func, "wglMakeContextCurrentARB") == 0)
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return (PROC)wglMakeContextCurrentARB;
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else if(ret && strcmp(func, "wglSetPixelFormatWINE") == 0)
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return (PROC)wglSetPixelFormatWINE;
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return ret;
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}
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/******************************************************************************
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* ChoosePixelFormat (GDI32.@)
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*/
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INT WINAPI ChoosePixelFormat( HDC hdc, const PIXELFORMATDESCRIPTOR *pfd )
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{
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if (!wglChoosePixelFormat)
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{
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if (!opengl32) opengl32 = LoadLibraryW( opengl32W );
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if (!(wglChoosePixelFormat = (void *)GetProcAddress( opengl32, "wglChoosePixelFormat" )))
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return 0;
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}
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return wglChoosePixelFormat( hdc, pfd );
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}
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/******************************************************************************
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* DescribePixelFormat (GDI32.@)
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*/
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INT WINAPI DescribePixelFormat( HDC hdc, INT fmt, UINT size, PIXELFORMATDESCRIPTOR *pfd )
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{
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if (!wglDescribePixelFormat)
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{
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if (!opengl32) opengl32 = LoadLibraryW( opengl32W );
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if (!(wglDescribePixelFormat = (void *)GetProcAddress( opengl32, "wglDescribePixelFormat" )))
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return 0;
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}
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return wglDescribePixelFormat( hdc, fmt, size, pfd );
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}
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/******************************************************************************
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* SetPixelFormat (GDI32.@)
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*/
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BOOL WINAPI SetPixelFormat( HDC hdc, INT fmt, const PIXELFORMATDESCRIPTOR *pfd )
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{
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if (!wglSetPixelFormat)
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{
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if (!opengl32) opengl32 = LoadLibraryW( opengl32W );
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if (!(wglSetPixelFormat = (void *)GetProcAddress( opengl32, "wglSetPixelFormat" )))
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return 0;
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}
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return wglSetPixelFormat( hdc, fmt, pfd );
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}
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/******************************************************************************
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* SwapBuffers (GDI32.@)
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*/
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BOOL WINAPI SwapBuffers( HDC hdc )
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{
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if (!wglSwapBuffers)
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{
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if (!opengl32) opengl32 = LoadLibraryW( opengl32W );
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if (!(wglSwapBuffers = (void *)GetProcAddress( opengl32, "wglSwapBuffers" )))
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return 0;
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}
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return wglSwapBuffers( hdc );
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}
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