Sweden-Number/dlls/gdi32/opengl.c

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/*
* OpenGL function forwarding to the display driver
*
* Copyright (c) 1999 Lionel Ulmer
* Copyright (c) 2005 Raphael Junqueira
* Copyright (c) 2006 Roderick Colenbrander
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include "config.h"
#include "wine/port.h"
#include <stdarg.h>
#include <string.h>
#include <stdlib.h>
#include "windef.h"
#include "winbase.h"
#include "wingdi.h"
#include "winerror.h"
#include "winternl.h"
#include "winnt.h"
#include "gdi_private.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(wgl);
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static HDC default_hdc = 0;
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typedef struct opengl_context
{
HDC hdc;
} *OPENGL_Context;
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/* We route all wgl functions from opengl32.dll through gdi32.dll to
* the display driver. Various wgl calls have a hDC as one of their parameters.
* 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
* if there's already a global hdc, it returns it.
*/
static DC* OPENGL_GetDefaultDC(void)
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{
if(!default_hdc)
default_hdc = CreateDCA("DISPLAY", NULL, NULL, NULL);
return get_dc_ptr(default_hdc);
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}
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/***********************************************************************
* wglCopyContext (OPENGL32.@)
*/
BOOL WINAPI wglCopyContext(HGLRC hglrcSrc, HGLRC hglrcDst, UINT mask)
{
DC *dc;
BOOL ret = FALSE;
OPENGL_Context ctx = (OPENGL_Context)hglrcSrc;
TRACE("hglrcSrc: (%p), hglrcDst: (%p), mask: %#x\n", hglrcSrc, hglrcDst, mask);
/* If no context is set, this call doesn't have a purpose */
if(!hglrcSrc || !hglrcDst)
return FALSE;
/* Retrieve the HDC associated with the context to access the display driver */
dc = get_dc_ptr(ctx->hdc);
if (dc)
{
PHYSDEV physdev = GET_DC_PHYSDEV( dc, pwglCopyContext );
ret = physdev->funcs->pwglCopyContext(hglrcSrc, hglrcDst, mask);
release_dc_ptr( dc );
}
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return ret;
}
/***********************************************************************
* wglCreateContext (OPENGL32.@)
*/
HGLRC WINAPI wglCreateContext(HDC hdc)
{
HGLRC ret = 0;
DC * dc = get_dc_ptr( hdc );
TRACE("(%p)\n",hdc);
if (dc)
{
PHYSDEV physdev = GET_DC_PHYSDEV( dc, pwglCreateContext );
update_dc( dc );
ret = physdev->funcs->pwglCreateContext( physdev );
release_dc_ptr( dc );
}
return ret;
}
/***********************************************************************
* wglCreateContextAttribsARB
*/
static HGLRC WINAPI wglCreateContextAttribsARB(HDC hdc, HGLRC hShareContext, const int *attributeList)
{
HGLRC ret = 0;
DC * dc = get_dc_ptr( hdc );
TRACE("(%p)\n",hdc);
if (dc)
{
PHYSDEV physdev = GET_DC_PHYSDEV( dc, pwglCreateContextAttribsARB );
update_dc( dc );
ret = physdev->funcs->pwglCreateContextAttribsARB( physdev, hShareContext, attributeList );
release_dc_ptr( dc );
}
return ret;
}
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/***********************************************************************
* wglDeleteContext (OPENGL32.@)
*/
BOOL WINAPI wglDeleteContext(HGLRC hglrc)
{
DC *dc;
BOOL ret = FALSE;
OPENGL_Context ctx = (OPENGL_Context)hglrc;
TRACE("hglrc: (%p)\n", hglrc);
if(ctx == NULL)
{
SetLastError(ERROR_INVALID_HANDLE);
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return FALSE;
}
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/* Retrieve the HDC associated with the context to access the display driver */
dc = get_dc_ptr(ctx->hdc);
if (dc)
{
PHYSDEV physdev = GET_DC_PHYSDEV( dc, pwglDeleteContext );
ret = physdev->funcs->pwglDeleteContext( hglrc );
release_dc_ptr( dc );
}
else SetLastError(ERROR_INVALID_HANDLE);
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return ret;
}
/***********************************************************************
* wglGetCurrentContext (OPENGL32.@)
*/
HGLRC WINAPI wglGetCurrentContext(void)
{
HGLRC ret = NtCurrentTeb()->glContext;
TRACE(" returning %p\n", ret);
return ret;
}
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/***********************************************************************
* wglGetCurrentDC (OPENGL32.@)
*/
HDC WINAPI wglGetCurrentDC(void)
{
OPENGL_Context ctx = (OPENGL_Context)wglGetCurrentContext();
TRACE(" found context: %p\n", ctx);
if(ctx == NULL)
return NULL;
/* Retrieve the current DC from the active context */
TRACE(" returning hdc: %p\n", ctx->hdc);
return ctx->hdc;
}
/***********************************************************************
* wglMakeCurrent (OPENGL32.@)
*/
BOOL WINAPI wglMakeCurrent(HDC hdc, HGLRC hglrc)
{
BOOL ret = FALSE;
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DC * dc = NULL;
/* When the context hglrc is NULL, the HDC is ignored and can be NULL.
* In that case use the global hDC to get access to the driver. */
if(hglrc == NULL)
{
if( hdc == NULL && !wglGetCurrentContext() )
{
WARN( "Current context is NULL\n");
SetLastError( ERROR_INVALID_HANDLE );
return FALSE;
}
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dc = OPENGL_GetDefaultDC();
}
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else
dc = get_dc_ptr( hdc );
TRACE("hdc: (%p), hglrc: (%p)\n", hdc, hglrc);
if (dc)
{
PHYSDEV physdev = GET_DC_PHYSDEV( dc, pwglMakeCurrent );
update_dc( dc );
ret = physdev->funcs->pwglMakeCurrent( physdev, hglrc );
release_dc_ptr( dc );
}
return ret;
}
/***********************************************************************
* wglMakeContextCurrentARB
*/
static BOOL WINAPI wglMakeContextCurrentARB(HDC hDrawDC, HDC hReadDC, HGLRC hglrc)
{
BOOL ret = FALSE;
PHYSDEV draw_physdev, read_physdev;
DC *DrawDC;
DC *ReadDC;
TRACE("hDrawDC: (%p), hReadDC: (%p) hglrc: (%p)\n", hDrawDC, hReadDC, hglrc);
/* Both hDrawDC and hReadDC need to be valid */
DrawDC = get_dc_ptr( hDrawDC );
if (!DrawDC) return FALSE;
ReadDC = get_dc_ptr( hReadDC );
if (!ReadDC) {
release_dc_ptr( DrawDC );
return FALSE;
}
update_dc( DrawDC );
update_dc( ReadDC );
draw_physdev = GET_DC_PHYSDEV( DrawDC, pwglMakeContextCurrentARB );
read_physdev = GET_DC_PHYSDEV( ReadDC, pwglMakeContextCurrentARB );
if (draw_physdev->funcs == read_physdev->funcs)
ret = draw_physdev->funcs->pwglMakeContextCurrentARB(draw_physdev, read_physdev, hglrc);
release_dc_ptr( DrawDC );
release_dc_ptr( ReadDC );
return ret;
}
/**************************************************************************************
* WINE-specific wglSetPixelFormat which can set the iPixelFormat multiple times
*
*/
static BOOL WINAPI wglSetPixelFormatWINE(HDC hdc, int iPixelFormat, const PIXELFORMATDESCRIPTOR *ppfd)
{
INT bRet = FALSE;
DC * dc = get_dc_ptr( hdc );
TRACE("(%p,%d,%p)\n", hdc, iPixelFormat, ppfd);
if (dc)
{
PHYSDEV physdev = GET_DC_PHYSDEV( dc, pwglSetPixelFormatWINE );
update_dc( dc );
bRet = physdev->funcs->pwglSetPixelFormatWINE( physdev, iPixelFormat, ppfd );
release_dc_ptr( dc );
}
return bRet;
}
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/***********************************************************************
* wglShareLists (OPENGL32.@)
*/
BOOL WINAPI wglShareLists(HGLRC hglrc1, HGLRC hglrc2)
{
DC *dc;
BOOL ret = FALSE;
OPENGL_Context ctx = (OPENGL_Context)hglrc1;
TRACE("hglrc1: (%p); hglrc: (%p)\n", hglrc1, hglrc2);
if(ctx == NULL || hglrc2 == NULL)
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return FALSE;
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/* Retrieve the HDC associated with the context to access the display driver */
dc = get_dc_ptr(ctx->hdc);
if (dc)
{
PHYSDEV physdev = GET_DC_PHYSDEV( dc, pwglShareLists );
ret = physdev->funcs->pwglShareLists( hglrc1, hglrc2 );
release_dc_ptr( dc );
}
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return ret;
}
/***********************************************************************
* wglUseFontBitmapsA (OPENGL32.@)
*/
BOOL WINAPI wglUseFontBitmapsA(HDC hdc, DWORD first, DWORD count, DWORD listBase)
{
BOOL ret = FALSE;
DC * dc = get_dc_ptr( hdc );
TRACE("(%p, %d, %d, %d)\n", hdc, first, count, listBase);
if (dc)
{
PHYSDEV physdev = GET_DC_PHYSDEV( dc, pwglUseFontBitmapsA );
ret = physdev->funcs->pwglUseFontBitmapsA( physdev, first, count, listBase );
release_dc_ptr( dc );
}
return ret;
}
/***********************************************************************
* wglUseFontBitmapsW (OPENGL32.@)
*/
BOOL WINAPI wglUseFontBitmapsW(HDC hdc, DWORD first, DWORD count, DWORD listBase)
{
BOOL ret = FALSE;
DC * dc = get_dc_ptr( hdc );
TRACE("(%p, %d, %d, %d)\n", hdc, first, count, listBase);
if (dc)
{
PHYSDEV physdev = GET_DC_PHYSDEV( dc, pwglUseFontBitmapsW );
ret = physdev->funcs->pwglUseFontBitmapsW( physdev, first, count, listBase );
release_dc_ptr( dc );
}
return ret;
}
/***********************************************************************
* Internal wglGetProcAddress for retrieving WGL extensions
*/
PROC WINAPI wglGetProcAddress(LPCSTR func)
{
PROC ret = NULL;
DC *dc;
if(!func)
return NULL;
TRACE("func: '%s'\n", func);
/* Retrieve the global hDC to get access to the driver. */
dc = OPENGL_GetDefaultDC();
if (dc)
{
PHYSDEV physdev = GET_DC_PHYSDEV( dc, pwglGetProcAddress );
ret = physdev->funcs->pwglGetProcAddress(func);
release_dc_ptr( dc );
}
/* At the moment we implement one WGL extension which requires a HDC. When we
* are looking up this call and when the Extension is available (that is the case
* when a non-NULL value is returned by wglGetProcAddress), we return the address
* of a wrapper function which will handle the HDC->PhysDev conversion.
*/
if(ret && strcmp(func, "wglCreateContextAttribsARB") == 0)
return (PROC)wglCreateContextAttribsARB;
else if(ret && strcmp(func, "wglMakeContextCurrentARB") == 0)
return (PROC)wglMakeContextCurrentARB;
else if(ret && strcmp(func, "wglSetPixelFormatWINE") == 0)
return (PROC)wglSetPixelFormatWINE;
return ret;
}