stw: move pixelformat_describe to shared

2 files changed, 68 insertions, 0 deletions

diff --git a/src/gallium/state_trackers/wgl/shared/stw_context.c b/src/gallium/state_trackers/wgl/shared/stw_context.c
index b54e084230..e89438557d 100644
--- a/src/gallium/state_trackers/wgl/shared/stw_context.c
+++ b/src/gallium/state_trackers/wgl/shared/stw_context.c
@@ -286,3 +286,60 @@ wgl_context_from_hdc(
    }
    return NULL;
 }
+
+
+
+int
+stw_pixelformat_describe(
+   HDC hdc,
+   int iPixelFormat,
+   UINT nBytes,
+   LPPIXELFORMATDESCRIPTOR ppfd )
+{
+   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;
+}
diff --git a/src/gallium/state_trackers/wgl/shared/stw_pixelformat.h b/src/gallium/state_trackers/wgl/shared/stw_pixelformat.h
index 0b67da8d25..da26df5c64 100644
--- a/src/gallium/state_trackers/wgl/shared/stw_pixelformat.h
+++ b/src/gallium/state_trackers/wgl/shared/stw_pixelformat.h
@@ -28,6 +28,8 @@
 #ifndef PIXELFORMAT_H
 #define PIXELFORMAT_H
 
+#include <windows.h>
+
 #define PF_FLAG_DOUBLEBUFFER  0x00000001
 #define PF_FLAG_MULTISAMPLED  0x00000002
 
@@ -73,4 +75,13 @@ pixelformat_get_extended_count( void );
 const struct pixelformat_info *
 pixelformat_get_info( uint index );
 
+
+int
+stw_pixelformat_describe(
+   HDC hdc,
+   int iPixelFormat,
+   UINT nBytes,
+   LPPIXELFORMATDESCRIPTOR ppfd );
+
+
 #endif /* PIXELFORMAT_H */