stw_wgl.h File Reference

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Functions
WINGDIAPI BOOL WINAPI	wglSwapBuffers (HDC hdc)
WINGDIAPI int WINAPI	wglChoosePixelFormat (HDC hdc, CONST PIXELFORMATDESCRIPTOR *ppfd)
WINGDIAPI int WINAPI	wglDescribePixelFormat (HDC hdc, int iPixelFormat, UINT nBytes, LPPIXELFORMATDESCRIPTOR ppfd)
WINGDIAPI int WINAPI	wglGetPixelFormat (HDC hdc)
WINGDIAPI BOOL WINAPI	wglSetPixelFormat (HDC hdc, int iPixelFormat, CONST PIXELFORMATDESCRIPTOR *ppfd)

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Function Documentation

WINGDIAPI int WINAPI wglChoosePixelFormat	(	HDC	hdc,
		CONST PIXELFORMATDESCRIPTOR *	ppfd
	)

Definition at line 38 of file stw_wgl_pixelformat.c.

References pixelformat_info::alpha, pixelformat_alpha_info::alphabits, pixelformat_color_info::bluebits, pixelformat_info::color, pixelformat_info::depth, pixelformat_depth_info::depthbits, pixelformat_info::flags, pixelformat_color_info::greenbits, PF_FLAG_DOUBLEBUFFER, pixelformat_get_count(), pixelformat_get_info(), pixelformat_color_info::redbits, and pixelformat_depth_info::stencilbits.

{
   uint count;
   uint index;
   uint bestindex;
   uint bestdelta;

   (void) hdc;

   count = pixelformat_get_count();
   bestindex = count;
   bestdelta = 0xffffffff;

   if (ppfd->nSize != sizeof( PIXELFORMATDESCRIPTOR ) || ppfd->nVersion != 1)
      return 0;
   if (ppfd->iPixelType != PFD_TYPE_RGBA)
      return 0;
   if (!(ppfd->dwFlags & PFD_DRAW_TO_WINDOW))
      return 0;
   if (!(ppfd->dwFlags & PFD_SUPPORT_OPENGL))
      return 0;
   if (ppfd->dwFlags & PFD_DRAW_TO_BITMAP)
      return 0;
   if (ppfd->dwFlags & PFD_SUPPORT_GDI)
      return 0;
   if (!(ppfd->dwFlags & PFD_STEREO_DONTCARE) && (ppfd->dwFlags & PFD_STEREO))
      return 0;

   for (index = 0; index < count; index++) {
      uint delta = 0;
      const struct pixelformat_info *pf = pixelformat_get_info( index );

      if (!(ppfd->dwFlags & PFD_DOUBLEBUFFER_DONTCARE)) {
         if ((ppfd->dwFlags & PFD_DOUBLEBUFFER) && !(pf->flags & PF_FLAG_DOUBLEBUFFER))
            continue;
         if (!(ppfd->dwFlags & PFD_DOUBLEBUFFER) && (pf->flags & PF_FLAG_DOUBLEBUFFER))
            continue;
      }

      if (ppfd->cColorBits != pf->color.redbits + pf->color.greenbits + pf->color.bluebits)
         delta += 8;

      if (ppfd->cDepthBits != pf->depth.depthbits)
         delta += 4;

      if (ppfd->cStencilBits != pf->depth.stencilbits)
         delta += 2;

      if (ppfd->cAlphaBits != pf->alpha.alphabits)
         delta++;

      if (delta < bestdelta) {
         bestindex = index;
         bestdelta = delta;
         if (bestdelta == 0)
            break;
      }
   }

   if (bestindex == count)
      return 0;
   return bestindex + 1;
}

WINGDIAPI int WINAPI wglDescribePixelFormat	(	HDC	hdc,
		int	iPixelFormat,
		UINT	nBytes,
		LPPIXELFORMATDESCRIPTOR	ppfd
	)

Definition at line 105 of file stw_wgl_pixelformat.c.

References pixelformat_info::alpha, pixelformat_alpha_info::alphabits, pixelformat_alpha_info::alphashift, pixelformat_color_info::bluebits, pixelformat_color_info::blueshift, pixelformat_info::color, pixelformat_info::depth, pixelformat_depth_info::depthbits, pixelformat_info::flags, pixelformat_color_info::greenbits, pixelformat_color_info::greenshift, PF_FLAG_DOUBLEBUFFER, pixelformat_get_extended_count(), pixelformat_get_info(), pixelformat_color_info::redbits, pixelformat_color_info::redshift, and pixelformat_depth_info::stencilbits.

{
   uint count;
   uint index;
   const struct pixelformat_info *pf;

   (void) hdc;

   count = pixelformat_get_extended_count();
   index = (uint) iPixelFormat - 1;

   if (ppfd == NULL)
      return count;
   if (index >= count || nBytes != sizeof( PIXELFORMATDESCRIPTOR ))
      return 0;

   pf = pixelformat_get_info( index );

   ppfd->nSize = sizeof( PIXELFORMATDESCRIPTOR );
   ppfd->nVersion = 1;
   ppfd->dwFlags = PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL;
   if (pf->flags & PF_FLAG_DOUBLEBUFFER)
      ppfd->dwFlags |= PFD_DOUBLEBUFFER | PFD_SWAP_COPY;
   ppfd->iPixelType = PFD_TYPE_RGBA;
   ppfd->cColorBits = pf->color.redbits + pf->color.greenbits + pf->color.bluebits;
   ppfd->cRedBits = pf->color.redbits;
   ppfd->cRedShift = pf->color.redshift;
   ppfd->cGreenBits = pf->color.greenbits;
   ppfd->cGreenShift = pf->color.greenshift;
   ppfd->cBlueBits = pf->color.bluebits;
   ppfd->cBlueShift = pf->color.blueshift;
   ppfd->cAlphaBits = pf->alpha.alphabits;
   ppfd->cAlphaShift = pf->alpha.alphashift;
   ppfd->cAccumBits = 0;
   ppfd->cAccumRedBits = 0;
   ppfd->cAccumGreenBits = 0;
   ppfd->cAccumBlueBits = 0;
   ppfd->cAccumAlphaBits = 0;
   ppfd->cDepthBits = pf->depth.depthbits;
   ppfd->cStencilBits = pf->depth.stencilbits;
   ppfd->cAuxBuffers = 0;
   ppfd->iLayerType = 0;
   ppfd->bReserved = 0;
   ppfd->dwLayerMask = 0;
   ppfd->dwVisibleMask = 0;
   ppfd->dwDamageMask = 0;

   return count;
}

WINGDIAPI int WINAPI wglGetPixelFormat

(

HDC

hdc

)

Definition at line 160 of file stw_wgl_pixelformat.c.

References currentpixelformat.

{
   (void) hdc;

   return currentpixelformat;
}

WINGDIAPI BOOL WINAPI wglSetPixelFormat	(	HDC	hdc,
		int	iPixelFormat,
		CONST PIXELFORMATDESCRIPTOR *	ppfd
	)

WINGDIAPI BOOL WINAPI wglSwapBuffers

(

HDC

hdc

)

Definition at line 41 of file stw_wgl_swapbuffers.c.

References FALSE, stw_winsys::flush_frontbuffer, framebuffer_from_hdc(), stw_device::screen, st_get_framebuffer_surface(), st_notify_swapbuffers(), ST_SURFACE_BACK_LEFT, stw_framebuffer::stfb, stw_dev, stw_device::stw_winsys, TRUE, and pipe_screen::winsys.

{
   struct stw_framebuffer *fb;
   struct pipe_surface *surf;

   fb = framebuffer_from_hdc( hdc );
   if (fb == NULL)
      return FALSE;

   /* If we're swapping the buffer associated with the current context
    * we have to flush any pending rendering commands first.
    */
   st_notify_swapbuffers( fb->stfb );

   surf = st_get_framebuffer_surface( fb->stfb, ST_SURFACE_BACK_LEFT );

   stw_dev->stw_winsys->flush_frontbuffer(stw_dev->screen->winsys,
                                          surf,
                                          hdc );

   return TRUE;
}

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