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winex11: Add a helper function to get a pixel format index.

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This commit is contained in:
Alexandre Julliard 2012-10-03 23:01:19 +02:00
parent 730479e6a4
commit 3d73e0a357
1 changed files with 7 additions and 2 deletions
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9
dlls/winex11.drv/opengl.c
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@ -1043,6 +1043,11 @@ static inline BOOL is_onscreen_pixel_format( int format )
return format > 0 && format <= nb_onscreen_formats;
}
static inline int pixel_format_index( const struct wgl_pixel_format *format )
{
return format - pixel_formats + 1;
}
/* GLX can advertise dozens of different pixelformats including offscreen and onscreen ones.
* In our WGL implementation we only support a subset of these formats namely the format of
* Wine's main visual and offscreen formats (if they are available).
@ -1506,7 +1511,7 @@ static int glxdrv_wglGetPixelFormat( HDC hdc )
if ((gl = get_gl_drawable( WindowFromDC( hdc ), hdc )))
{
ret = gl->format - pixel_formats + 1;
ret = pixel_format_index( gl->format );
/* Offscreen formats can't be used with traditional WGL calls.
* As has been verified on Windows GetPixelFormat doesn't fail but returns iPixelFormat=1. */
if (!is_onscreen_pixel_format( ret )) ret = 1;
@ -1550,7 +1555,7 @@ static BOOL glxdrv_wglSetPixelFormat( HDC hdc, int iPixelFormat, const PIXELFORM
if ((gl = get_gl_drawable( hwnd, hdc )))
{
int prev = gl->format - pixel_formats + 1;
int prev = pixel_format_index( gl->format );
release_gl_drawable( gl );
return prev == iPixelFormat; /* cannot change it if already set */
}