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- don't discard valid pixel formats and use flags only for ranking

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- patch by Robert Millan (rmh dot reactos at aybabtu dot com)

See issue #4384 for more details.

svn path=/trunk/; revision=41112
This commit is contained in:
Kamil Hornicek 2009-05-25 10:50:03 +00:00
parent 8e792cec37
commit 6e73768999
1 changed files with 18 additions and 11 deletions
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29
reactos/dll/win32/opengl32/wgl.c
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@ -502,6 +502,16 @@ ROSGL_SetContextCallBack( const ICDTable *table )
*/
#define BUFFERDEPTH_SCORE(want, have) \
((want == 0) ? (0) : ((want < have) ? (1) : ((want > have) ? (3) : (0))))
/* Score if we want and not have it */
#define FLAG_SCORE(want, have, flag) \
(((want & ~have) & flag) ? (1) : (0))
/* Score if what we want is different than what we have, except when
_DONTCARE was set */
#define FLAG_SCORE_DONTCARE(want, have, flag) \
((!(have & flag ## _DONTCARE)) && ((want & flag) != (have & flag)) ? (1) : (0))
int
APIENTRY
rosglChoosePixelFormat( HDC hdc, CONST PIXELFORMATDESCRIPTOR *pfd )
@ -512,8 +522,6 @@ rosglChoosePixelFormat( HDC hdc, CONST PIXELFORMATDESCRIPTOR *pfd )
int best = 0;
int score, bestScore = 0x7fff; /* used to choose a pfd if no exact match */
int icdNumFormats;
const DWORD compareFlags = PFD_DRAW_TO_WINDOW | PFD_DRAW_TO_BITMAP |
PFD_SUPPORT_GDI | PFD_SUPPORT_OPENGL;
DBGTRACE( "Called!" );
@ -555,18 +563,17 @@ rosglChoosePixelFormat( HDC hdc, CONST PIXELFORMATDESCRIPTOR *pfd )
continue;
}
score = 0; /* higher is worse */
/* compare flags */
if ((pfd->dwFlags & compareFlags) != (icdPfd.dwFlags & compareFlags))
continue;
if (!(pfd->dwFlags & PFD_DOUBLEBUFFER_DONTCARE) &&
((pfd->dwFlags & PFD_DOUBLEBUFFER) != (icdPfd.dwFlags & PFD_DOUBLEBUFFER)))
continue;
if (!(pfd->dwFlags & PFD_STEREO_DONTCARE) &&
((pfd->dwFlags & PFD_STEREO) != (icdPfd.dwFlags & PFD_STEREO)))
continue;
score += FLAG_SCORE(pfd->dwFlags, icdPfd.dwFlags, PFD_DRAW_TO_WINDOW);
score += FLAG_SCORE(pfd->dwFlags, icdPfd.dwFlags, PFD_DRAW_TO_BITMAP);
score += FLAG_SCORE(pfd->dwFlags, icdPfd.dwFlags, PFD_SUPPORT_GDI);
score += FLAG_SCORE(pfd->dwFlags, icdPfd.dwFlags, PFD_SUPPORT_OPENGL);
score += FLAG_SCORE_DONTCARE(pfd->dwFlags, icdPfd.dwFlags, PFD_DOUBLEBUFFER);
score += FLAG_SCORE_DONTCARE(pfd->dwFlags, icdPfd.dwFlags, PFD_STEREO);
/* check other attribs */
score = 0; /* higher is worse */
if (pfd->iPixelType != icdPfd.iPixelType)
score += 5; /* this is really bad i think */
if (pfd->iLayerType != icdPfd.iLayerType)