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Sweden-Number/dlls/opengl32/wgl.c

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/* Window-specific OpenGL functions implementation.
*
* Copyright (c) 1999 Lionel Ulmer
* Copyright (c) 2005 Raphael Junqueira
*
* 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 <stdlib.h>
#include <string.h>
#include "opengl_ext.h"
#include "windef.h"
#include "winbase.h"
#include "winuser.h"
#include "winreg.h"
#include "wingdi.h"
#include "winternl.h"
#include "winnt.h"
#define WGL_WGLEXT_PROTOTYPES
#include "wine/wglext.h"
#include "wine/gdi_driver.h"
#include "wine/wgl_driver.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(wgl);
WINE_DECLARE_DEBUG_CHANNEL(fps);
extern struct opengl_funcs null_opengl_funcs;
/* handle management */
#define MAX_WGL_HANDLES 1024
enum wgl_handle_type
{
HANDLE_PBUFFER = 0 << 12,
HANDLE_CONTEXT = 1 << 12,
HANDLE_CONTEXT_V3 = 3 << 12,
HANDLE_TYPE_MASK = 15 << 12
};
struct opengl_context
{
DWORD tid; /* thread that the context is current in */
HDC draw_dc; /* current drawing DC */
HDC read_dc; /* current reading DC */
GLubyte *extensions; /* extension string */
struct wgl_context *drv_ctx; /* driver context */
};
struct wgl_handle
{
UINT handle;
struct opengl_funcs *funcs;
union
{
struct opengl_context *context; /* for HANDLE_CONTEXT */
struct wgl_pbuffer *pbuffer; /* for HANDLE_PBUFFER */
struct wgl_handle *next; /* for free handles */
} u;
};
static struct wgl_handle wgl_handles[MAX_WGL_HANDLES];
static struct wgl_handle *next_free;
static unsigned int handle_count;
static CRITICAL_SECTION wgl_section;
static CRITICAL_SECTION_DEBUG critsect_debug =
{
0, 0, &wgl_section,
{ &critsect_debug.ProcessLocksList, &critsect_debug.ProcessLocksList },
0, 0, { (DWORD_PTR)(__FILE__ ": wgl_section") }
};
static CRITICAL_SECTION wgl_section = { &critsect_debug, -1, 0, 0, 0, 0 };
static inline struct opengl_funcs *get_dc_funcs( HDC hdc )
{
struct opengl_funcs *funcs = __wine_get_wgl_driver( hdc, WINE_WGL_DRIVER_VERSION );
if (funcs == (void *)-1) funcs = &null_opengl_funcs;
return funcs;
}
static inline HANDLE next_handle( struct wgl_handle *ptr, enum wgl_handle_type type )
{
WORD generation = HIWORD( ptr->handle ) + 1;
if (!generation) generation++;
ptr->handle = MAKELONG( ptr - wgl_handles, generation ) | type;
return ULongToHandle( ptr->handle );
}
/* the current context is assumed valid and doesn't need locking */
static inline struct wgl_handle *get_current_context_ptr(void)
{
if (!NtCurrentTeb()->glCurrentRC) return NULL;
return &wgl_handles[LOWORD(NtCurrentTeb()->glCurrentRC) & ~HANDLE_TYPE_MASK];
}
static struct wgl_handle *get_handle_ptr( HANDLE handle, enum wgl_handle_type type )
{
unsigned int index = LOWORD( handle ) & ~HANDLE_TYPE_MASK;
EnterCriticalSection( &wgl_section );
if (index < handle_count && ULongToHandle(wgl_handles[index].handle) == handle)
return &wgl_handles[index];
LeaveCriticalSection( &wgl_section );
SetLastError( ERROR_INVALID_HANDLE );
return NULL;
}
static void release_handle_ptr( struct wgl_handle *ptr )
{
if (ptr) LeaveCriticalSection( &wgl_section );
}
static HANDLE alloc_handle( enum wgl_handle_type type, struct opengl_funcs *funcs, void *user_ptr )
{
HANDLE handle = 0;
struct wgl_handle *ptr = NULL;
EnterCriticalSection( &wgl_section );
if ((ptr = next_free))
next_free = next_free->u.next;
else if (handle_count < MAX_WGL_HANDLES)
ptr = &wgl_handles[handle_count++];
if (ptr)
{
ptr->funcs = funcs;
ptr->u.context = user_ptr;
handle = next_handle( ptr, type );
}
else SetLastError( ERROR_NOT_ENOUGH_MEMORY );
LeaveCriticalSection( &wgl_section );
return handle;
}
static void free_handle_ptr( struct wgl_handle *ptr )
{
ptr->handle |= 0xffff;
ptr->u.next = next_free;
ptr->funcs = NULL;
next_free = ptr;
LeaveCriticalSection( &wgl_section );
}
static inline enum wgl_handle_type get_current_context_type(void)
{
if (!NtCurrentTeb()->glCurrentRC) return HANDLE_CONTEXT;
return LOWORD(NtCurrentTeb()->glCurrentRC) & HANDLE_TYPE_MASK;
}
/***********************************************************************
* wglCopyContext (OPENGL32.@)
*/
BOOL WINAPI wglCopyContext(HGLRC hglrcSrc, HGLRC hglrcDst, UINT mask)
{
struct wgl_handle *src, *dst;
BOOL ret = FALSE;
if (!(src = get_handle_ptr( hglrcSrc, HANDLE_CONTEXT ))) return FALSE;
if ((dst = get_handle_ptr( hglrcDst, HANDLE_CONTEXT )))
{
if (src->funcs != dst->funcs) SetLastError( ERROR_INVALID_HANDLE );
else ret = src->funcs->wgl.p_wglCopyContext( src->u.context->drv_ctx,
dst->u.context->drv_ctx, mask );
}
release_handle_ptr( dst );
release_handle_ptr( src );
return ret;
}
/***********************************************************************
* wglDeleteContext (OPENGL32.@)
*/
BOOL WINAPI wglDeleteContext(HGLRC hglrc)
{
struct wgl_handle *ptr = get_handle_ptr( hglrc, HANDLE_CONTEXT );
if (!ptr) return FALSE;
if (ptr->u.context->tid && ptr->u.context->tid != GetCurrentThreadId())
{
SetLastError( ERROR_BUSY );
release_handle_ptr( ptr );
return FALSE;
}
if (hglrc == NtCurrentTeb()->glCurrentRC) wglMakeCurrent( 0, 0 );
ptr->funcs->wgl.p_wglDeleteContext( ptr->u.context->drv_ctx );
HeapFree( GetProcessHeap(), 0, ptr->u.context->extensions );
HeapFree( GetProcessHeap(), 0, ptr->u.context );
free_handle_ptr( ptr );
return TRUE;
}
/***********************************************************************
* wglMakeCurrent (OPENGL32.@)
*/
BOOL WINAPI wglMakeCurrent(HDC hdc, HGLRC hglrc)
{
BOOL ret = TRUE;
struct wgl_handle *ptr, *prev = get_current_context_ptr();
if (hglrc)
{
if (!(ptr = get_handle_ptr( hglrc, HANDLE_CONTEXT ))) return FALSE;
if (!ptr->u.context->tid || ptr->u.context->tid == GetCurrentThreadId())
{
ret = ptr->funcs->wgl.p_wglMakeCurrent( hdc, ptr->u.context->drv_ctx );
if (ret)
{
if (prev) prev->u.context->tid = 0;
ptr->u.context->tid = GetCurrentThreadId();
ptr->u.context->draw_dc = hdc;
ptr->u.context->read_dc = hdc;
NtCurrentTeb()->glCurrentRC = hglrc;
NtCurrentTeb()->glTable = ptr->funcs;
}
}
else
{
SetLastError( ERROR_BUSY );
ret = FALSE;
}
release_handle_ptr( ptr );
}
else if (prev)
{
if (!prev->funcs->wgl.p_wglMakeCurrent( 0, NULL )) return FALSE;
prev->u.context->tid = 0;
NtCurrentTeb()->glCurrentRC = 0;
NtCurrentTeb()->glTable = &null_opengl_funcs;
}
else if (!hdc)
{
SetLastError( ERROR_INVALID_HANDLE );
ret = FALSE;
}
return ret;
}
/***********************************************************************
* wglCreateContextAttribsARB
*
* Provided by the WGL_ARB_create_context extension.
*/
HGLRC WINAPI wglCreateContextAttribsARB( HDC hdc, HGLRC share, const int *attribs )
{
HGLRC ret = 0;
struct wgl_context *drv_ctx;
struct wgl_handle *share_ptr = NULL;
struct opengl_context *context;
struct opengl_funcs *funcs = get_dc_funcs( hdc );
if (!funcs || !funcs->ext.p_wglCreateContextAttribsARB) return 0;
if (share && !(share_ptr = get_handle_ptr( share, HANDLE_CONTEXT ))) return 0;
if ((drv_ctx = funcs->ext.p_wglCreateContextAttribsARB( hdc,
share_ptr ? share_ptr->u.context->drv_ctx : NULL, attribs )))
{
if ((context = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(*context) )))
{
enum wgl_handle_type type = HANDLE_CONTEXT;
if (attribs)
{
while (*attribs)
{
if (attribs[0] == WGL_CONTEXT_MAJOR_VERSION_ARB)
{
if (attribs[1] >= 3)
type = HANDLE_CONTEXT_V3;
break;
}
attribs += 2;
}
}
context->drv_ctx = drv_ctx;
if (!(ret = alloc_handle( type, funcs, context )))
HeapFree( GetProcessHeap(), 0, context );
}
if (!ret) funcs->wgl.p_wglDeleteContext( drv_ctx );
}
release_handle_ptr( share_ptr );
return ret;
}
/***********************************************************************
* wglMakeContextCurrentARB
*
* Provided by the WGL_ARB_make_current_read extension.
*/
BOOL WINAPI wglMakeContextCurrentARB( HDC draw_hdc, HDC read_hdc, HGLRC hglrc )
{
BOOL ret = TRUE;
struct wgl_handle *ptr, *prev = get_current_context_ptr();
if (hglrc)
{
if (!(ptr = get_handle_ptr( hglrc, HANDLE_CONTEXT ))) return FALSE;
if (!ptr->u.context->tid || ptr->u.context->tid == GetCurrentThreadId())
{
ret = (ptr->funcs->ext.p_wglMakeContextCurrentARB &&
ptr->funcs->ext.p_wglMakeContextCurrentARB( draw_hdc, read_hdc,
ptr->u.context->drv_ctx ));
if (ret)
{
if (prev) prev->u.context->tid = 0;
ptr->u.context->tid = GetCurrentThreadId();
ptr->u.context->draw_dc = draw_hdc;
ptr->u.context->read_dc = read_hdc;
NtCurrentTeb()->glCurrentRC = hglrc;
NtCurrentTeb()->glTable = ptr->funcs;
}
}
else
{
SetLastError( ERROR_BUSY );
ret = FALSE;
}
release_handle_ptr( ptr );
}
else if (prev)
{
if (!prev->funcs->wgl.p_wglMakeCurrent( 0, NULL )) return FALSE;
prev->u.context->tid = 0;
NtCurrentTeb()->glCurrentRC = 0;
NtCurrentTeb()->glTable = &null_opengl_funcs;
}
return ret;
}
/***********************************************************************
* wglGetCurrentReadDCARB
*
* Provided by the WGL_ARB_make_current_read extension.
*/
HDC WINAPI wglGetCurrentReadDCARB(void)
{
struct wgl_handle *ptr = get_current_context_ptr();
if (!ptr) return 0;
return ptr->u.context->read_dc;
}
/***********************************************************************
* wglShareLists (OPENGL32.@)
*/
BOOL WINAPI wglShareLists(HGLRC hglrcSrc, HGLRC hglrcDst)
{
BOOL ret = FALSE;
struct wgl_handle *src, *dst;
if (!(src = get_handle_ptr( hglrcSrc, HANDLE_CONTEXT ))) return FALSE;
if ((dst = get_handle_ptr( hglrcDst, HANDLE_CONTEXT )))
{
if (src->funcs != dst->funcs) SetLastError( ERROR_INVALID_HANDLE );
else ret = src->funcs->wgl.p_wglShareLists( src->u.context->drv_ctx, dst->u.context->drv_ctx );
}
release_handle_ptr( dst );
release_handle_ptr( src );
return ret;
}
/***********************************************************************
* wglGetCurrentDC (OPENGL32.@)
*/
HDC WINAPI wglGetCurrentDC(void)
{
struct wgl_handle *ptr = get_current_context_ptr();
if (!ptr) return 0;
return ptr->u.context->draw_dc;
}
/***********************************************************************
* wglCreateContext (OPENGL32.@)
*/
HGLRC WINAPI wglCreateContext(HDC hdc)
{
HGLRC ret = 0;
struct wgl_context *drv_ctx;
struct opengl_context *context;
struct opengl_funcs *funcs = get_dc_funcs( hdc );
if (!funcs) return 0;
if (!(drv_ctx = funcs->wgl.p_wglCreateContext( hdc ))) return 0;
if ((context = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(*context) )))
{
context->drv_ctx = drv_ctx;
if (!(ret = alloc_handle( HANDLE_CONTEXT, funcs, context )))
HeapFree( GetProcessHeap(), 0, context );
}
if (!ret) funcs->wgl.p_wglDeleteContext( drv_ctx );
return ret;
}
/***********************************************************************
* wglGetCurrentContext (OPENGL32.@)
*/
HGLRC WINAPI wglGetCurrentContext(void)
{
return NtCurrentTeb()->glCurrentRC;
}
/***********************************************************************
* wglDescribePixelFormat (OPENGL32.@)
*/
INT WINAPI wglDescribePixelFormat(HDC hdc, INT format, UINT size, PIXELFORMATDESCRIPTOR *descr )
{
struct opengl_funcs *funcs = get_dc_funcs( hdc );
if (!funcs) return 0;
return funcs->wgl.p_wglDescribePixelFormat( hdc, format, size, descr );
}
/***********************************************************************
* wglChoosePixelFormat (OPENGL32.@)
*/
INT WINAPI wglChoosePixelFormat(HDC hdc, const PIXELFORMATDESCRIPTOR* ppfd)
{
PIXELFORMATDESCRIPTOR format, best;
int i, count, best_format;
int bestDBuffer = -1, bestStereo = -1;
TRACE_(wgl)( "%p %p: size %u version %u flags %u type %u color %u %u,%u,%u,%u "
"accum %u depth %u stencil %u aux %u\n",
hdc, ppfd, ppfd->nSize, ppfd->nVersion, ppfd->dwFlags, ppfd->iPixelType,
ppfd->cColorBits, ppfd->cRedBits, ppfd->cGreenBits, ppfd->cBlueBits, ppfd->cAlphaBits,
ppfd->cAccumBits, ppfd->cDepthBits, ppfd->cStencilBits, ppfd->cAuxBuffers );
count = wglDescribePixelFormat( hdc, 0, 0, NULL );
if (!count) return 0;
best_format = 0;
best.dwFlags = 0;
best.cAlphaBits = -1;
best.cColorBits = -1;
best.cDepthBits = -1;
best.cStencilBits = -1;
best.cAuxBuffers = -1;
for (i = 1; i <= count; i++)
{
if (!wglDescribePixelFormat( hdc, i, sizeof(format), &format )) continue;
if (ppfd->iPixelType != format.iPixelType)
{
TRACE( "pixel type mismatch for iPixelFormat=%d\n", i );
continue;
}
/* only use bitmap capable for formats for bitmap rendering */
if( (ppfd->dwFlags & PFD_DRAW_TO_BITMAP) != (format.dwFlags & PFD_DRAW_TO_BITMAP))
{
TRACE( "PFD_DRAW_TO_BITMAP mismatch for iPixelFormat=%d\n", i );
continue;
}
/* The behavior of PDF_STEREO/PFD_STEREO_DONTCARE and PFD_DOUBLEBUFFER / PFD_DOUBLEBUFFER_DONTCARE
* is not very clear on MSDN. They specify that ChoosePixelFormat tries to match pixel formats
* with the flag (PFD_STEREO / PFD_DOUBLEBUFFERING) set. Otherwise it says that it tries to match
* formats without the given flag set.
* A test on Windows using a Radeon 9500pro on WinXP (the driver doesn't support Stereo)
* has indicated that a format without stereo is returned when stereo is unavailable.
* So in case PFD_STEREO is set, formats that support it should have priority above formats
* without. In case PFD_STEREO_DONTCARE is set, stereo is ignored.
*
* To summarize the following is most likely the correct behavior:
* stereo not set -> prefer non-stereo formats, but also accept stereo formats
* stereo set -> prefer stereo formats, but also accept non-stereo formats
* stereo don't care -> it doesn't matter whether we get stereo or not
*
* In Wine we will treat non-stereo the same way as don't care because it makes
* format selection even more complicated and second drivers with Stereo advertise
* each format twice anyway.
*/
/* Doublebuffer, see the comments above */
if (!(ppfd->dwFlags & PFD_DOUBLEBUFFER_DONTCARE))
{
if (((ppfd->dwFlags & PFD_DOUBLEBUFFER) != bestDBuffer) &&
((format.dwFlags & PFD_DOUBLEBUFFER) == (ppfd->dwFlags & PFD_DOUBLEBUFFER)))
goto found;
if (bestDBuffer != -1 && (format.dwFlags & PFD_DOUBLEBUFFER) != bestDBuffer) continue;
}
/* Stereo, see the comments above. */
if (!(ppfd->dwFlags & PFD_STEREO_DONTCARE))
{
if (((ppfd->dwFlags & PFD_STEREO) != bestStereo) &&
((format.dwFlags & PFD_STEREO) == (ppfd->dwFlags & PFD_STEREO)))
goto found;
if (bestStereo != -1 && (format.dwFlags & PFD_STEREO) != bestStereo) continue;
}
/* Below we will do a number of checks to select the 'best' pixelformat.
* We assume the precedence cColorBits > cAlphaBits > cDepthBits > cStencilBits -> cAuxBuffers.
* The code works by trying to match the most important options as close as possible.
* When a reasonable format is found, we will try to match more options.
* It appears (see the opengl32 test) that Windows opengl drivers ignore options
* like cColorBits, cAlphaBits and friends if they are set to 0, so they are considered
* as DONTCARE. At least Serious Sam TSE relies on this behavior. */
if (ppfd->cColorBits)
{
if (((ppfd->cColorBits > best.cColorBits) && (format.cColorBits > best.cColorBits)) ||
((format.cColorBits >= ppfd->cColorBits) && (format.cColorBits < best.cColorBits)))
goto found;
if (best.cColorBits != format.cColorBits) /* Do further checks if the format is compatible */
{
TRACE( "color mismatch for iPixelFormat=%d\n", i );
continue;
}
}
if (ppfd->cAlphaBits)
{
if (((ppfd->cAlphaBits > best.cAlphaBits) && (format.cAlphaBits > best.cAlphaBits)) ||
((format.cAlphaBits >= ppfd->cAlphaBits) && (format.cAlphaBits < best.cAlphaBits)))
goto found;
if (best.cAlphaBits != format.cAlphaBits)
{
TRACE( "alpha mismatch for iPixelFormat=%d\n", i );
continue;
}
}
if (ppfd->cDepthBits)
{
if (((ppfd->cDepthBits > best.cDepthBits) && (format.cDepthBits > best.cDepthBits)) ||
((format.cDepthBits >= ppfd->cDepthBits) && (format.cDepthBits < best.cDepthBits)))
goto found;
if (best.cDepthBits != format.cDepthBits)
{
TRACE( "depth mismatch for iPixelFormat=%d\n", i );
continue;
}
}
if (ppfd->cStencilBits)
{
if (((ppfd->cStencilBits > best.cStencilBits) && (format.cStencilBits > best.cStencilBits)) ||
((format.cStencilBits >= ppfd->cStencilBits) && (format.cStencilBits < best.cStencilBits)))
goto found;
if (best.cStencilBits != format.cStencilBits)
{
TRACE( "stencil mismatch for iPixelFormat=%d\n", i );
continue;
}
}
if (ppfd->cAuxBuffers)
{
if (((ppfd->cAuxBuffers > best.cAuxBuffers) && (format.cAuxBuffers > best.cAuxBuffers)) ||
((format.cAuxBuffers >= ppfd->cAuxBuffers) && (format.cAuxBuffers < best.cAuxBuffers)))
goto found;
if (best.cAuxBuffers != format.cAuxBuffers)
{
TRACE( "aux mismatch for iPixelFormat=%d\n", i );
continue;
}
}
continue;
found:
best_format = i;
best = format;
bestDBuffer = format.dwFlags & PFD_DOUBLEBUFFER;
bestStereo = format.dwFlags & PFD_STEREO;
}
TRACE( "returning %u\n", best_format );
return best_format;
}
/***********************************************************************
* wglGetPixelFormat (OPENGL32.@)
*/
INT WINAPI wglGetPixelFormat(HDC hdc)
{
struct opengl_funcs *funcs = get_dc_funcs( hdc );
if (!funcs) return 0;
return funcs->wgl.p_wglGetPixelFormat( hdc );
}
/***********************************************************************
* wglSetPixelFormat(OPENGL32.@)
*/
BOOL WINAPI wglSetPixelFormat( HDC hdc, INT format, const PIXELFORMATDESCRIPTOR *descr )
{
struct opengl_funcs *funcs = get_dc_funcs( hdc );
if (!funcs) return FALSE;
return funcs->wgl.p_wglSetPixelFormat( hdc, format, descr );
}
/***********************************************************************
* wglSwapBuffers (OPENGL32.@)
*/
BOOL WINAPI DECLSPEC_HOTPATCH wglSwapBuffers( HDC hdc )
{
const struct opengl_funcs *funcs = get_dc_funcs( hdc );
if (!funcs || !funcs->wgl.p_wglSwapBuffers) return FALSE;
if (!funcs->wgl.p_wglSwapBuffers( hdc )) return FALSE;
if (TRACE_ON(fps))
{
static long prev_time, start_time;
static unsigned long frames, frames_total;
DWORD time = GetTickCount();
frames++;
frames_total++;
/* every 1.5 seconds */
if (time - prev_time > 1500)
{
TRACE_(fps)("@ approx %.2ffps, total %.2ffps\n",
1000.0*frames/(time - prev_time), 1000.0*frames_total/(time - start_time));
prev_time = time;
frames = 0;
if (start_time == 0) start_time = time;
}
}
return TRUE;
}
/***********************************************************************
* wglCreateLayerContext (OPENGL32.@)
*/
HGLRC WINAPI wglCreateLayerContext(HDC hdc,
int iLayerPlane) {
TRACE("(%p,%d)\n", hdc, iLayerPlane);
if (iLayerPlane == 0) {
return wglCreateContext(hdc);
}
FIXME("no handler for layer %d\n", iLayerPlane);
return NULL;
}
/***********************************************************************
* wglDescribeLayerPlane (OPENGL32.@)
*/
BOOL WINAPI wglDescribeLayerPlane(HDC hdc,
int iPixelFormat,
int iLayerPlane,
UINT nBytes,
LPLAYERPLANEDESCRIPTOR plpd) {
FIXME("(%p,%d,%d,%d,%p)\n", hdc, iPixelFormat, iLayerPlane, nBytes, plpd);
return FALSE;
}
/***********************************************************************
* wglGetLayerPaletteEntries (OPENGL32.@)
*/
int WINAPI wglGetLayerPaletteEntries(HDC hdc,
int iLayerPlane,
int iStart,
int cEntries,
const COLORREF *pcr) {
FIXME("(): stub!\n");
return 0;
}
void WINAPI glGetIntegerv(GLenum pname, GLint *data)
{
const struct opengl_funcs *funcs = NtCurrentTeb()->glTable;
TRACE("(%d, %p)\n", pname, data);
funcs->gl.p_glGetIntegerv(pname, data);
}
const GLubyte * WINAPI glGetStringi(GLenum name, GLuint index)
{
const struct opengl_funcs *funcs = NtCurrentTeb()->glTable;
TRACE("(%d, %d)\n", name, index);
if (!funcs->ext.p_glGetStringi)
{
void **func_ptr = (void **)&funcs->ext.p_glGetStringi;
*func_ptr = funcs->wgl.p_wglGetProcAddress("glGetStringi");
}
return funcs->ext.p_glGetStringi(name, index);
}
/* check if the extension is present in the list */
static BOOL has_extension( const char *list, const char *ext, size_t len )
{
if (!list)
{
const char *gl_ext;
unsigned int i;
GLint extensions_count;
glGetIntegerv(GL_NUM_EXTENSIONS, &extensions_count);
for (i = 0; i < extensions_count; ++i)
{
gl_ext = (const char *)glGetStringi(GL_EXTENSIONS, i);
if (!strncmp(gl_ext, ext, len) && !gl_ext[len])
return TRUE;
}
return FALSE;
}
while (list)
{
while (*list == ' ') list++;
if (!strncmp( list, ext, len ) && (!list[len] || list[len] == ' ')) return TRUE;
list = strchr( list, ' ' );
}
return FALSE;
}
static int compar(const void *elt_a, const void *elt_b) {
return strcmp(((const OpenGL_extension *) elt_a)->name,
((const OpenGL_extension *) elt_b)->name);
}
/* Check if a GL extension is supported */
static BOOL is_extension_supported(const char* extension)
{
enum wgl_handle_type type = get_current_context_type();
const struct opengl_funcs *funcs = NtCurrentTeb()->glTable;
const char *gl_ext_string = NULL;
size_t len;
TRACE("Checking for extension '%s'\n", extension);
if (type == HANDLE_CONTEXT)
{
gl_ext_string = (const char*)glGetString(GL_EXTENSIONS);
if (!gl_ext_string)
{
ERR("No OpenGL extensions found, check if your OpenGL setup is correct!\n");
return FALSE;
}
}
/* We use the GetProcAddress function from the display driver to retrieve function pointers
* for OpenGL and WGL extensions. In case of winex11.drv the OpenGL extension lookup is done
* using glXGetProcAddress. This function is quite unreliable in the sense that its specs don't
* require the function to return NULL when an extension isn't found. For this reason we check
* if the OpenGL extension required for the function we are looking up is supported. */
while ((len = strcspn(extension, " ")) != 0)
{
/* Check if the extension is part of the GL extension string to see if it is supported. */
if (has_extension(gl_ext_string, extension, len))
return TRUE;
/* In general an OpenGL function starts as an ARB/EXT extension and at some stage
* it becomes part of the core OpenGL library and can be reached without the ARB/EXT
* suffix as well. In the extension table, these functions contain GL_VERSION_major_minor.
* Check if we are searching for a core GL function */
if(strncmp(extension, "GL_VERSION_", 11) == 0)
{
const GLubyte *gl_version = funcs->gl.p_glGetString(GL_VERSION);
const char *version = extension + 11; /* Move past 'GL_VERSION_' */
if(!gl_version) {
ERR("No OpenGL version found!\n");
return FALSE;
}
/* Compare the major/minor version numbers of the native OpenGL library and what is required by the function.
* The gl_version string is guaranteed to have at least a major/minor and sometimes it has a release number as well. */
if( (gl_version[0] >= version[0]) || ((gl_version[0] == version[0]) && (gl_version[2] >= version[2])) ) {
return TRUE;
}
WARN("The function requires OpenGL version '%c.%c' while your drivers only provide '%c.%c'\n", version[0], version[2], gl_version[0], gl_version[2]);
}
if (extension[len] == ' ') len++;
extension += len;
}
return FALSE;
}
/***********************************************************************
* wglGetProcAddress (OPENGL32.@)
*/
PROC WINAPI wglGetProcAddress( LPCSTR name )
{
struct opengl_funcs *funcs = NtCurrentTeb()->glTable;
void **func_ptr;
OpenGL_extension ext;
const OpenGL_extension *ext_ret;
if (!name) return NULL;
/* Without an active context opengl32 doesn't know to what
* driver it has to dispatch wglGetProcAddress.
*/
if (!get_current_context_ptr())
{
WARN("No active WGL context found\n");
return NULL;
}
ext.name = name;
ext_ret = bsearch(&ext, extension_registry, extension_registry_size, sizeof(ext), compar);
if (!ext_ret)
{
WARN("Function %s unknown\n", name);
return NULL;
}
func_ptr = (void **)&funcs->ext + (ext_ret - extension_registry);
if (!*func_ptr)
{
void *driver_func = funcs->wgl.p_wglGetProcAddress( name );
if (!is_extension_supported(ext_ret->extension))
WARN("Extension %s required for %s not supported\n", ext_ret->extension, name);
if (driver_func == NULL)
{
WARN("Function %s not supported by driver\n", name);
return NULL;
}
*func_ptr = driver_func;
}
TRACE("returning %s -> %p\n", name, ext_ret->func);
return ext_ret->func;
}
/***********************************************************************
* wglRealizeLayerPalette (OPENGL32.@)
*/
BOOL WINAPI wglRealizeLayerPalette(HDC hdc,
int iLayerPlane,
BOOL bRealize) {
FIXME("()\n");
return FALSE;
}
/***********************************************************************
* wglSetLayerPaletteEntries (OPENGL32.@)
*/
int WINAPI wglSetLayerPaletteEntries(HDC hdc,
int iLayerPlane,
int iStart,
int cEntries,
const COLORREF *pcr) {
FIXME("(): stub!\n");
return 0;
}
/***********************************************************************
* wglSwapLayerBuffers (OPENGL32.@)
*/
BOOL WINAPI wglSwapLayerBuffers(HDC hdc,
UINT fuPlanes) {
TRACE("(%p, %08x)\n", hdc, fuPlanes);
if (fuPlanes & WGL_SWAP_MAIN_PLANE) {
if (!wglSwapBuffers( hdc )) return FALSE;
fuPlanes &= ~WGL_SWAP_MAIN_PLANE;
}
if (fuPlanes) {
WARN("Following layers unhandled: %08x\n", fuPlanes);
}
return TRUE;
}
/***********************************************************************
* wglAllocateMemoryNV
*
* Provided by the WGL_NV_vertex_array_range extension.
*/
void * WINAPI wglAllocateMemoryNV( GLsizei size, GLfloat readfreq, GLfloat writefreq, GLfloat priority )
{
const struct opengl_funcs *funcs = NtCurrentTeb()->glTable;
if (!funcs->ext.p_wglAllocateMemoryNV) return NULL;
return funcs->ext.p_wglAllocateMemoryNV( size, readfreq, writefreq, priority );
}
/***********************************************************************
* wglFreeMemoryNV
*
* Provided by the WGL_NV_vertex_array_range extension.
*/
void WINAPI wglFreeMemoryNV( void *pointer )
{
const struct opengl_funcs *funcs = NtCurrentTeb()->glTable;
if (funcs->ext.p_wglFreeMemoryNV) funcs->ext.p_wglFreeMemoryNV( pointer );
}
/***********************************************************************
* wglBindTexImageARB
*
* Provided by the WGL_ARB_render_texture extension.
*/
BOOL WINAPI wglBindTexImageARB( HPBUFFERARB handle, int buffer )
{
struct wgl_handle *ptr = get_handle_ptr( handle, HANDLE_PBUFFER );
BOOL ret;
if (!ptr) return FALSE;
ret = ptr->funcs->ext.p_wglBindTexImageARB( ptr->u.pbuffer, buffer );
release_handle_ptr( ptr );
return ret;
}
/***********************************************************************
* wglReleaseTexImageARB
*
* Provided by the WGL_ARB_render_texture extension.
*/
BOOL WINAPI wglReleaseTexImageARB( HPBUFFERARB handle, int buffer )
{
struct wgl_handle *ptr = get_handle_ptr( handle, HANDLE_PBUFFER );
BOOL ret;
if (!ptr) return FALSE;
ret = ptr->funcs->ext.p_wglReleaseTexImageARB( ptr->u.pbuffer, buffer );
release_handle_ptr( ptr );
return ret;
}
/***********************************************************************
* wglSetPbufferAttribARB
*
* Provided by the WGL_ARB_render_texture extension.
*/
BOOL WINAPI wglSetPbufferAttribARB( HPBUFFERARB handle, const int *attribs )
{
struct wgl_handle *ptr = get_handle_ptr( handle, HANDLE_PBUFFER );
BOOL ret;
if (!ptr) return FALSE;
ret = ptr->funcs->ext.p_wglSetPbufferAttribARB( ptr->u.pbuffer, attribs );
release_handle_ptr( ptr );
return ret;
}
/***********************************************************************
* wglChoosePixelFormatARB
*
* Provided by the WGL_ARB_pixel_format extension.
*/
BOOL WINAPI wglChoosePixelFormatARB( HDC hdc, const int *iattribs, const FLOAT *fattribs,
UINT max, int *formats, UINT *count )
{
const struct opengl_funcs *funcs = get_dc_funcs( hdc );
if (!funcs || !funcs->ext.p_wglChoosePixelFormatARB) return FALSE;
return funcs->ext.p_wglChoosePixelFormatARB( hdc, iattribs, fattribs, max, formats, count );
}
/***********************************************************************
* wglGetPixelFormatAttribivARB
*
* Provided by the WGL_ARB_pixel_format extension.
*/
BOOL WINAPI wglGetPixelFormatAttribivARB( HDC hdc, int format, int layer, UINT count, const int *attribs,
int *values )
{
const struct opengl_funcs *funcs = get_dc_funcs( hdc );
if (!funcs || !funcs->ext.p_wglGetPixelFormatAttribivARB) return FALSE;
return funcs->ext.p_wglGetPixelFormatAttribivARB( hdc, format, layer, count, attribs, values );
}
/***********************************************************************
* wglGetPixelFormatAttribfvARB
*
* Provided by the WGL_ARB_pixel_format extension.
*/
BOOL WINAPI wglGetPixelFormatAttribfvARB( HDC hdc, int format, int layer, UINT count, const int *attribs,
FLOAT *values )
{
const struct opengl_funcs *funcs = get_dc_funcs( hdc );
if (!funcs || !funcs->ext.p_wglGetPixelFormatAttribfvARB) return FALSE;
return funcs->ext.p_wglGetPixelFormatAttribfvARB( hdc, format, layer, count, attribs, values );
}
/***********************************************************************
* wglCreatePbufferARB
*
* Provided by the WGL_ARB_pbuffer extension.
*/
HPBUFFERARB WINAPI wglCreatePbufferARB( HDC hdc, int format, int width, int height, const int *attribs )
{
HPBUFFERARB ret = 0;
struct wgl_pbuffer *pbuffer;
struct opengl_funcs *funcs = get_dc_funcs( hdc );
if (!funcs || !funcs->ext.p_wglCreatePbufferARB) return 0;
if (!(pbuffer = funcs->ext.p_wglCreatePbufferARB( hdc, format, width, height, attribs ))) return 0;
ret = alloc_handle( HANDLE_PBUFFER, funcs, pbuffer );
if (!ret) funcs->ext.p_wglDestroyPbufferARB( pbuffer );
return ret;
}
/***********************************************************************
* wglGetPbufferDCARB
*
* Provided by the WGL_ARB_pbuffer extension.
*/
HDC WINAPI wglGetPbufferDCARB( HPBUFFERARB handle )
{
struct wgl_handle *ptr = get_handle_ptr( handle, HANDLE_PBUFFER );
HDC ret;
if (!ptr) return 0;
ret = ptr->funcs->ext.p_wglGetPbufferDCARB( ptr->u.pbuffer );
release_handle_ptr( ptr );
return ret;
}
/***********************************************************************
* wglReleasePbufferDCARB
*
* Provided by the WGL_ARB_pbuffer extension.
*/
int WINAPI wglReleasePbufferDCARB( HPBUFFERARB handle, HDC hdc )
{
struct wgl_handle *ptr = get_handle_ptr( handle, HANDLE_PBUFFER );
BOOL ret;
if (!ptr) return FALSE;
ret = ptr->funcs->ext.p_wglReleasePbufferDCARB( ptr->u.pbuffer, hdc );
release_handle_ptr( ptr );
return ret;
}
/***********************************************************************
* wglDestroyPbufferARB
*
* Provided by the WGL_ARB_pbuffer extension.
*/
BOOL WINAPI wglDestroyPbufferARB( HPBUFFERARB handle )
{
struct wgl_handle *ptr = get_handle_ptr( handle, HANDLE_PBUFFER );
if (!ptr) return FALSE;
ptr->funcs->ext.p_wglDestroyPbufferARB( ptr->u.pbuffer );
free_handle_ptr( ptr );
return TRUE;
}
/***********************************************************************
* wglQueryPbufferARB
*
* Provided by the WGL_ARB_pbuffer extension.
*/
BOOL WINAPI wglQueryPbufferARB( HPBUFFERARB handle, int attrib, int *value )
{
struct wgl_handle *ptr = get_handle_ptr( handle, HANDLE_PBUFFER );
BOOL ret;
if (!ptr) return FALSE;
ret = ptr->funcs->ext.p_wglQueryPbufferARB( ptr->u.pbuffer, attrib, value );
release_handle_ptr( ptr );
return ret;
}
/***********************************************************************
* wglGetExtensionsStringARB
*
* Provided by the WGL_ARB_extensions_string extension.
*/
const char * WINAPI wglGetExtensionsStringARB( HDC hdc )
{
const struct opengl_funcs *funcs = get_dc_funcs( hdc );
if (!funcs || !funcs->ext.p_wglGetExtensionsStringARB) return NULL;
return (const char *)funcs->ext.p_wglGetExtensionsStringARB( hdc );
}
/***********************************************************************
* wglGetExtensionsStringEXT
*
* Provided by the WGL_EXT_extensions_string extension.
*/
const char * WINAPI wglGetExtensionsStringEXT(void)
{
const struct opengl_funcs *funcs = NtCurrentTeb()->glTable;
if (!funcs->ext.p_wglGetExtensionsStringEXT) return NULL;
return (const char *)funcs->ext.p_wglGetExtensionsStringEXT();
}
/***********************************************************************
* wglSwapIntervalEXT
*
* Provided by the WGL_EXT_swap_control extension.
*/
BOOL WINAPI wglSwapIntervalEXT( int interval )
{
const struct opengl_funcs *funcs = NtCurrentTeb()->glTable;
if (!funcs->ext.p_wglSwapIntervalEXT) return FALSE;
return funcs->ext.p_wglSwapIntervalEXT( interval );
}
/***********************************************************************
* wglGetSwapIntervalEXT
*
* Provided by the WGL_EXT_swap_control extension.
*/
int WINAPI wglGetSwapIntervalEXT(void)
{
const struct opengl_funcs *funcs = NtCurrentTeb()->glTable;
if (!funcs->ext.p_wglGetSwapIntervalEXT) return FALSE;
return funcs->ext.p_wglGetSwapIntervalEXT();
}
/***********************************************************************
* wglSetPixelFormatWINE
*
* Provided by the WGL_WINE_pixel_format_passthrough extension.
*/
BOOL WINAPI wglSetPixelFormatWINE( HDC hdc, int format )
{
const struct opengl_funcs *funcs = get_dc_funcs( hdc );
if (!funcs || !funcs->ext.p_wglSetPixelFormatWINE) return FALSE;
return funcs->ext.p_wglSetPixelFormatWINE( hdc, format );
}
/***********************************************************************
* wglUseFontBitmaps_common
*/
static BOOL wglUseFontBitmaps_common( HDC hdc, DWORD first, DWORD count, DWORD listBase, BOOL unicode )
{
const struct opengl_funcs *funcs = NtCurrentTeb()->glTable;
GLYPHMETRICS gm;
unsigned int glyph, size = 0;
void *bitmap = NULL, *gl_bitmap = NULL;
int org_alignment;
BOOL ret = TRUE;
funcs->gl.p_glGetIntegerv(GL_UNPACK_ALIGNMENT, &org_alignment);
funcs->gl.p_glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
for (glyph = first; glyph < first + count; glyph++) {
static const MAT2 identity = { {0,1},{0,0},{0,0},{0,1} };
unsigned int needed_size, height, width, width_int;
if (unicode)
needed_size = GetGlyphOutlineW(hdc, glyph, GGO_BITMAP, &gm, 0, NULL, &identity);
else
needed_size = GetGlyphOutlineA(hdc, glyph, GGO_BITMAP, &gm, 0, NULL, &identity);
TRACE("Glyph: %3d / List: %d size %d\n", glyph, listBase, needed_size);
if (needed_size == GDI_ERROR) {
ret = FALSE;
break;
}
if (needed_size > size) {
size = needed_size;
HeapFree(GetProcessHeap(), 0, bitmap);
HeapFree(GetProcessHeap(), 0, gl_bitmap);
bitmap = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, size);
gl_bitmap = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, size);
}
if (needed_size != 0) {
if (unicode)
ret = (GetGlyphOutlineW(hdc, glyph, GGO_BITMAP, &gm,
size, bitmap, &identity) != GDI_ERROR);
else
ret = (GetGlyphOutlineA(hdc, glyph, GGO_BITMAP, &gm,
size, bitmap, &identity) != GDI_ERROR);
if (!ret) break;
}
if (TRACE_ON(wgl)) {
unsigned int bitmask;
unsigned char *bitmap_ = bitmap;
TRACE(" - bbox: %d x %d\n", gm.gmBlackBoxX, gm.gmBlackBoxY);
TRACE(" - origin: (%d, %d)\n", gm.gmptGlyphOrigin.x, gm.gmptGlyphOrigin.y);
TRACE(" - increment: %d - %d\n", gm.gmCellIncX, gm.gmCellIncY);
if (needed_size != 0) {
TRACE(" - bitmap:\n");
for (height = 0; height < gm.gmBlackBoxY; height++) {
TRACE(" ");
for (width = 0, bitmask = 0x80; width < gm.gmBlackBoxX; width++, bitmask >>= 1) {
if (bitmask == 0) {
bitmap_ += 1;
bitmask = 0x80;
}
if (*bitmap_ & bitmask)
TRACE("*");
else
TRACE(" ");
}
bitmap_ += (4 - ((UINT_PTR)bitmap_ & 0x03));
TRACE("\n");
}
}
}
/* In OpenGL, the bitmap is drawn from the bottom to the top... So we need to invert the
* glyph for it to be drawn properly.
*/
if (needed_size != 0) {
width_int = (gm.gmBlackBoxX + 31) / 32;
for (height = 0; height < gm.gmBlackBoxY; height++) {
for (width = 0; width < width_int; width++) {
((int *) gl_bitmap)[(gm.gmBlackBoxY - height - 1) * width_int + width] =
((int *) bitmap)[height * width_int + width];
}
}
}
funcs->gl.p_glNewList(listBase++, GL_COMPILE);
if (needed_size != 0) {
funcs->gl.p_glBitmap(gm.gmBlackBoxX, gm.gmBlackBoxY,
0 - gm.gmptGlyphOrigin.x, (int) gm.gmBlackBoxY - gm.gmptGlyphOrigin.y,
gm.gmCellIncX, gm.gmCellIncY,
gl_bitmap);
} else {
/* This is the case of 'empty' glyphs like the space character */
funcs->gl.p_glBitmap(0, 0, 0, 0, gm.gmCellIncX, gm.gmCellIncY, NULL);
}
funcs->gl.p_glEndList();
}
funcs->gl.p_glPixelStorei(GL_UNPACK_ALIGNMENT, org_alignment);
HeapFree(GetProcessHeap(), 0, bitmap);
HeapFree(GetProcessHeap(), 0, gl_bitmap);
return ret;
}
/***********************************************************************
* wglUseFontBitmapsA (OPENGL32.@)
*/
BOOL WINAPI wglUseFontBitmapsA(HDC hdc, DWORD first, DWORD count, DWORD listBase)
{
return wglUseFontBitmaps_common( hdc, first, count, listBase, FALSE );
}
/***********************************************************************
* wglUseFontBitmapsW (OPENGL32.@)
*/
BOOL WINAPI wglUseFontBitmapsW(HDC hdc, DWORD first, DWORD count, DWORD listBase)
{
return wglUseFontBitmaps_common( hdc, first, count, listBase, TRUE );
}
/* FIXME: should probably have a glu.h header */
typedef struct GLUtesselator GLUtesselator;
typedef void (WINAPI *_GLUfuncptr)(void);
#define GLU_TESS_BEGIN 100100
#define GLU_TESS_VERTEX 100101
#define GLU_TESS_END 100102
static GLUtesselator * (WINAPI *pgluNewTess)(void);
static void (WINAPI *pgluDeleteTess)(GLUtesselator *tess);
static void (WINAPI *pgluTessNormal)(GLUtesselator *tess, GLdouble x, GLdouble y, GLdouble z);
static void (WINAPI *pgluTessBeginPolygon)(GLUtesselator *tess, void *polygon_data);
static void (WINAPI *pgluTessEndPolygon)(GLUtesselator *tess);
static void (WINAPI *pgluTessCallback)(GLUtesselator *tess, GLenum which, _GLUfuncptr fn);
static void (WINAPI *pgluTessBeginContour)(GLUtesselator *tess);
static void (WINAPI *pgluTessEndContour)(GLUtesselator *tess);
static void (WINAPI *pgluTessVertex)(GLUtesselator *tess, GLdouble *location, GLvoid* data);
static HMODULE load_libglu(void)
{
static const WCHAR glu32W[] = {'g','l','u','3','2','.','d','l','l',0};
static BOOL already_loaded;
static HMODULE module;
if (already_loaded) return module;
already_loaded = TRUE;
TRACE("Trying to load GLU library\n");
module = LoadLibraryW( glu32W );
if (!module)
{
WARN("Failed to load glu32\n");
return NULL;
}
#define LOAD_FUNCPTR(f) p##f = (void *)GetProcAddress( module, #f )
LOAD_FUNCPTR(gluNewTess);
LOAD_FUNCPTR(gluDeleteTess);
LOAD_FUNCPTR(gluTessBeginContour);
LOAD_FUNCPTR(gluTessNormal);
LOAD_FUNCPTR(gluTessBeginPolygon);
LOAD_FUNCPTR(gluTessCallback);
LOAD_FUNCPTR(gluTessEndContour);
LOAD_FUNCPTR(gluTessEndPolygon);
LOAD_FUNCPTR(gluTessVertex);
#undef LOAD_FUNCPTR
return module;
}
static void fixed_to_double(POINTFX fixed, UINT em_size, GLdouble vertex[3])
{
vertex[0] = (fixed.x.value + (GLdouble)fixed.x.fract / (1 << 16)) / em_size;
vertex[1] = (fixed.y.value + (GLdouble)fixed.y.fract / (1 << 16)) / em_size;
vertex[2] = 0.0;
}
static void WINAPI tess_callback_vertex(GLvoid *vertex)
{
const struct opengl_funcs *funcs = NtCurrentTeb()->glTable;
GLdouble *dbl = vertex;
TRACE("%f, %f, %f\n", dbl[0], dbl[1], dbl[2]);
funcs->gl.p_glVertex3dv(vertex);
}
static void WINAPI tess_callback_begin(GLenum which)
{
const struct opengl_funcs *funcs = NtCurrentTeb()->glTable;
TRACE("%d\n", which);
funcs->gl.p_glBegin(which);
}
static void WINAPI tess_callback_end(void)
{
const struct opengl_funcs *funcs = NtCurrentTeb()->glTable;
TRACE("\n");
funcs->gl.p_glEnd();
}
typedef struct _bezier_vector {
GLdouble x;
GLdouble y;
} bezier_vector;
static double bezier_deviation_squared(const bezier_vector *p)
{
bezier_vector deviation;
bezier_vector vertex;
bezier_vector base;
double base_length;
double dot;
vertex.x = (p[0].x + p[1].x*2 + p[2].x)/4 - p[0].x;
vertex.y = (p[0].y + p[1].y*2 + p[2].y)/4 - p[0].y;
base.x = p[2].x - p[0].x;
base.y = p[2].y - p[0].y;
base_length = sqrt(base.x*base.x + base.y*base.y);
base.x /= base_length;
base.y /= base_length;
dot = base.x*vertex.x + base.y*vertex.y;
dot = min(max(dot, 0.0), base_length);
base.x *= dot;
base.y *= dot;
deviation.x = vertex.x-base.x;
deviation.y = vertex.y-base.y;
return deviation.x*deviation.x + deviation.y*deviation.y;
}
static int bezier_approximate(const bezier_vector *p, bezier_vector *points, FLOAT deviation)
{
bezier_vector first_curve[3];
bezier_vector second_curve[3];
bezier_vector vertex;
int total_vertices;
if(bezier_deviation_squared(p) <= deviation*deviation)
{
if(points)
*points = p[2];
return 1;
}
vertex.x = (p[0].x + p[1].x*2 + p[2].x)/4;
vertex.y = (p[0].y + p[1].y*2 + p[2].y)/4;
first_curve[0] = p[0];
first_curve[1].x = (p[0].x + p[1].x)/2;
first_curve[1].y = (p[0].y + p[1].y)/2;
first_curve[2] = vertex;
second_curve[0] = vertex;
second_curve[1].x = (p[2].x + p[1].x)/2;
second_curve[1].y = (p[2].y + p[1].y)/2;
second_curve[2] = p[2];
total_vertices = bezier_approximate(first_curve, points, deviation);
if(points)
points += total_vertices;
total_vertices += bezier_approximate(second_curve, points, deviation);
return total_vertices;
}
/***********************************************************************
* wglUseFontOutlines_common
*/
static BOOL wglUseFontOutlines_common(HDC hdc,
DWORD first,
DWORD count,
DWORD listBase,
FLOAT deviation,
FLOAT extrusion,
int format,
LPGLYPHMETRICSFLOAT lpgmf,
BOOL unicode)
{
const struct opengl_funcs *funcs = NtCurrentTeb()->glTable;
UINT glyph;
const MAT2 identity = {{0,1},{0,0},{0,0},{0,1}};
GLUtesselator *tess = NULL;
LOGFONTW lf;
HFONT old_font, unscaled_font;
UINT em_size = 1024;
RECT rc;
TRACE("(%p, %d, %d, %d, %f, %f, %d, %p, %s)\n", hdc, first, count,
listBase, deviation, extrusion, format, lpgmf, unicode ? "W" : "A");
if(deviation <= 0.0)
deviation = 1.0/em_size;
if(format == WGL_FONT_POLYGONS)
{
if (!load_libglu())
{
ERR("glu32 is required for this function but isn't available\n");
return FALSE;
}
tess = pgluNewTess();
if(!tess) return FALSE;
pgluTessCallback(tess, GLU_TESS_VERTEX, (_GLUfuncptr)tess_callback_vertex);
pgluTessCallback(tess, GLU_TESS_BEGIN, (_GLUfuncptr)tess_callback_begin);
pgluTessCallback(tess, GLU_TESS_END, tess_callback_end);
}
GetObjectW(GetCurrentObject(hdc, OBJ_FONT), sizeof(lf), &lf);
rc.left = rc.right = rc.bottom = 0;
rc.top = em_size;
DPtoLP(hdc, (POINT*)&rc, 2);
lf.lfHeight = -abs(rc.top - rc.bottom);
lf.lfOrientation = lf.lfEscapement = 0;
unscaled_font = CreateFontIndirectW(&lf);
old_font = SelectObject(hdc, unscaled_font);
for (glyph = first; glyph < first + count; glyph++)
{
DWORD needed;
GLYPHMETRICS gm;
BYTE *buf;
TTPOLYGONHEADER *pph;
TTPOLYCURVE *ppc;
GLdouble *vertices = NULL;
int vertex_total = -1;
if(unicode)
needed = GetGlyphOutlineW(hdc, glyph, GGO_NATIVE, &gm, 0, NULL, &identity);
else
needed = GetGlyphOutlineA(hdc, glyph, GGO_NATIVE, &gm, 0, NULL, &identity);
if(needed == GDI_ERROR)
goto error;
buf = HeapAlloc(GetProcessHeap(), 0, needed);
if(unicode)
GetGlyphOutlineW(hdc, glyph, GGO_NATIVE, &gm, needed, buf, &identity);
else
GetGlyphOutlineA(hdc, glyph, GGO_NATIVE, &gm, needed, buf, &identity);
TRACE("glyph %d\n", glyph);
if(lpgmf)
{
lpgmf->gmfBlackBoxX = (float)gm.gmBlackBoxX / em_size;
lpgmf->gmfBlackBoxY = (float)gm.gmBlackBoxY / em_size;
lpgmf->gmfptGlyphOrigin.x = (float)gm.gmptGlyphOrigin.x / em_size;
lpgmf->gmfptGlyphOrigin.y = (float)gm.gmptGlyphOrigin.y / em_size;
lpgmf->gmfCellIncX = (float)gm.gmCellIncX / em_size;
lpgmf->gmfCellIncY = (float)gm.gmCellIncY / em_size;
TRACE("%fx%f at %f,%f inc %f,%f\n", lpgmf->gmfBlackBoxX, lpgmf->gmfBlackBoxY,
lpgmf->gmfptGlyphOrigin.x, lpgmf->gmfptGlyphOrigin.y, lpgmf->gmfCellIncX, lpgmf->gmfCellIncY);
lpgmf++;
}
funcs->gl.p_glNewList(listBase++, GL_COMPILE);
funcs->gl.p_glFrontFace(GL_CCW);
if(format == WGL_FONT_POLYGONS)
{
funcs->gl.p_glNormal3d(0.0, 0.0, 1.0);
pgluTessNormal(tess, 0, 0, 1);
pgluTessBeginPolygon(tess, NULL);
}
while(!vertices)
{
if(vertex_total != -1)
vertices = HeapAlloc(GetProcessHeap(), 0, vertex_total * 3 * sizeof(GLdouble));
vertex_total = 0;
pph = (TTPOLYGONHEADER*)buf;
while((BYTE*)pph < buf + needed)
{
GLdouble previous[3];
fixed_to_double(pph->pfxStart, em_size, previous);
if(vertices)
TRACE("\tstart %d, %d\n", pph->pfxStart.x.value, pph->pfxStart.y.value);
if(format == WGL_FONT_POLYGONS)
pgluTessBeginContour(tess);
else
funcs->gl.p_glBegin(GL_LINE_LOOP);
if(vertices)
{
fixed_to_double(pph->pfxStart, em_size, vertices);
if(format == WGL_FONT_POLYGONS)
pgluTessVertex(tess, vertices, vertices);
else
funcs->gl.p_glVertex3d(vertices[0], vertices[1], vertices[2]);
vertices += 3;
}
vertex_total++;
ppc = (TTPOLYCURVE*)((char*)pph + sizeof(*pph));
while((char*)ppc < (char*)pph + pph->cb)
{
int i, j;
int num;
switch(ppc->wType) {
case TT_PRIM_LINE:
for(i = 0; i < ppc->cpfx; i++)
{
if(vertices)
{
TRACE("\t\tline to %d, %d\n",
ppc->apfx[i].x.value, ppc->apfx[i].y.value);
fixed_to_double(ppc->apfx[i], em_size, vertices);
if(format == WGL_FONT_POLYGONS)
pgluTessVertex(tess, vertices, vertices);
else
funcs->gl.p_glVertex3d(vertices[0], vertices[1], vertices[2]);
vertices += 3;
}
fixed_to_double(ppc->apfx[i], em_size, previous);
vertex_total++;
}
break;
case TT_PRIM_QSPLINE:
for(i = 0; i < ppc->cpfx-1; i++)
{
bezier_vector curve[3];
bezier_vector *points;
GLdouble curve_vertex[3];
if(vertices)
TRACE("\t\tcurve %d,%d %d,%d\n",
ppc->apfx[i].x.value, ppc->apfx[i].y.value,
ppc->apfx[i + 1].x.value, ppc->apfx[i + 1].y.value);
curve[0].x = previous[0];
curve[0].y = previous[1];
fixed_to_double(ppc->apfx[i], em_size, curve_vertex);
curve[1].x = curve_vertex[0];
curve[1].y = curve_vertex[1];
fixed_to_double(ppc->apfx[i + 1], em_size, curve_vertex);
curve[2].x = curve_vertex[0];
curve[2].y = curve_vertex[1];
if(i < ppc->cpfx-2)
{
curve[2].x = (curve[1].x + curve[2].x)/2;
curve[2].y = (curve[1].y + curve[2].y)/2;
}
num = bezier_approximate(curve, NULL, deviation);
points = HeapAlloc(GetProcessHeap(), 0, num*sizeof(bezier_vector));
num = bezier_approximate(curve, points, deviation);
vertex_total += num;
if(vertices)
{
for(j=0; j<num; j++)
{
TRACE("\t\t\tvertex at %f,%f\n", points[j].x, points[j].y);
vertices[0] = points[j].x;
vertices[1] = points[j].y;
vertices[2] = 0.0;
if(format == WGL_FONT_POLYGONS)
pgluTessVertex(tess, vertices, vertices);
else
funcs->gl.p_glVertex3d(vertices[0], vertices[1], vertices[2]);
vertices += 3;
}
}
HeapFree(GetProcessHeap(), 0, points);
previous[0] = curve[2].x;
previous[1] = curve[2].y;
}
break;
default:
ERR("\t\tcurve type = %d\n", ppc->wType);
if(format == WGL_FONT_POLYGONS)
pgluTessEndContour(tess);
else
funcs->gl.p_glEnd();
goto error_in_list;
}
ppc = (TTPOLYCURVE*)((char*)ppc + sizeof(*ppc) +
(ppc->cpfx - 1) * sizeof(POINTFX));
}
if(format == WGL_FONT_POLYGONS)
pgluTessEndContour(tess);
else
funcs->gl.p_glEnd();
pph = (TTPOLYGONHEADER*)((char*)pph + pph->cb);
}
}
error_in_list:
if(format == WGL_FONT_POLYGONS)
pgluTessEndPolygon(tess);
funcs->gl.p_glTranslated((GLdouble)gm.gmCellIncX / em_size, (GLdouble)gm.gmCellIncY / em_size, 0.0);
funcs->gl.p_glEndList();
HeapFree(GetProcessHeap(), 0, buf);
HeapFree(GetProcessHeap(), 0, vertices);
}
error:
DeleteObject(SelectObject(hdc, old_font));
if(format == WGL_FONT_POLYGONS)
pgluDeleteTess(tess);
return TRUE;
}
/***********************************************************************
* wglUseFontOutlinesA (OPENGL32.@)
*/
BOOL WINAPI wglUseFontOutlinesA(HDC hdc,
DWORD first,
DWORD count,
DWORD listBase,
FLOAT deviation,
FLOAT extrusion,
int format,
LPGLYPHMETRICSFLOAT lpgmf)
{
return wglUseFontOutlines_common(hdc, first, count, listBase, deviation, extrusion, format, lpgmf, FALSE);
}
/***********************************************************************
* wglUseFontOutlinesW (OPENGL32.@)
*/
BOOL WINAPI wglUseFontOutlinesW(HDC hdc,
DWORD first,
DWORD count,
DWORD listBase,
FLOAT deviation,
FLOAT extrusion,
int format,
LPGLYPHMETRICSFLOAT lpgmf)
{
return wglUseFontOutlines_common(hdc, first, count, listBase, deviation, extrusion, format, lpgmf, TRUE);
}
/***********************************************************************
* glDebugEntry (OPENGL32.@)
*/
GLint WINAPI glDebugEntry( GLint unknown1, GLint unknown2 )
{
return 0;
}
/* build the extension string by filtering out the disabled extensions */
static GLubyte *filter_extensions( const char *extensions )
{
static const char *disabled;
char *p, *str;
const char *end;
TRACE( "GL_EXTENSIONS:\n" );
if (!extensions) extensions = "";
if (!disabled)
{
HKEY hkey;
DWORD size;
str = NULL;
/* @@ Wine registry key: HKCU\Software\Wine\OpenGL */
if (!RegOpenKeyA( HKEY_CURRENT_USER, "Software\\Wine\\OpenGL", &hkey ))
{
if (!RegQueryValueExA( hkey, "DisabledExtensions", 0, NULL, NULL, &size ))
{
str = HeapAlloc( GetProcessHeap(), 0, size );
if (RegQueryValueExA( hkey, "DisabledExtensions", 0, NULL, (BYTE *)str, &size )) *str = 0;
}
RegCloseKey( hkey );
}
if (str)
{
if (InterlockedCompareExchangePointer( (void **)&disabled, str, NULL ))
HeapFree( GetProcessHeap(), 0, str );
}
else disabled = "";
}
if (!disabled[0]) return NULL;
if ((str = HeapAlloc( GetProcessHeap(), 0, strlen(extensions) + 2 )))
{
p = str;
for (;;)
{
while (*extensions == ' ') extensions++;
if (!*extensions) break;
if (!(end = strchr( extensions, ' ' ))) end = extensions + strlen( extensions );
memcpy( p, extensions, end - extensions );
p[end - extensions] = 0;
if (!has_extension( disabled, p , strlen( p )))
{
TRACE("++ %s\n", p );
p += end - extensions;
*p++ = ' ';
}
else TRACE("-- %s (disabled by config)\n", p );
extensions = end;
}
*p = 0;
}
return (GLubyte *)str;
}
/***********************************************************************
* glGetString (OPENGL32.@)
*/
const GLubyte * WINAPI glGetString( GLenum name )
{
const struct opengl_funcs *funcs = NtCurrentTeb()->glTable;
const GLubyte *ret = funcs->gl.p_glGetString( name );
if (name == GL_EXTENSIONS && ret)
{
struct wgl_handle *ptr = get_current_context_ptr();
if (ptr->u.context->extensions ||
((ptr->u.context->extensions = filter_extensions( (const char *)ret ))))
ret = ptr->u.context->extensions;
}
return ret;
}
/***********************************************************************
* OpenGL initialisation routine
*/
BOOL WINAPI DllMain( HINSTANCE hinst, DWORD reason, LPVOID reserved )
{
switch(reason)
{
case DLL_PROCESS_ATTACH:
NtCurrentTeb()->glTable = &null_opengl_funcs;
break;
case DLL_THREAD_ATTACH:
NtCurrentTeb()->glTable = &null_opengl_funcs;
break;
}
return TRUE;
}
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