gdi32: Make the convert_bits and stretch_bits helpers external.

dlls/gdi32/bitblt.c

@@ -166,7 +166,7 @@ void free_heap_bits( struct gdi_image_bits *bits )
     HeapFree( GetProcessHeap(), 0, bits->ptr );
 }
 
-static DWORD convert_bits( const BITMAPINFO *src_info, struct bitblt_coords *src,
+DWORD convert_bits( const BITMAPINFO *src_info, struct bitblt_coords *src,
                     BITMAPINFO *dst_info, struct gdi_image_bits *bits, BOOL add_alpha )
 {
     void *ptr;
@@ -184,7 +184,7 @@ static DWORD convert_bits( const BITMAPINFO *src_info, struct bitblt_coords *src
     return err;
 }
 
-static DWORD stretch_bits( const BITMAPINFO *src_info, struct bitblt_coords *src,
+DWORD stretch_bits( const BITMAPINFO *src_info, struct bitblt_coords *src,
                     BITMAPINFO *dst_info, struct bitblt_coords *dst,
                     struct gdi_image_bits *bits, int mode )
 {

dlls/gdi32/gdi_private.h

@@ -223,7 +223,12 @@ extern BOOL BIDI_Reorder( HDC hDC, LPCWSTR lpString, INT uCount, DWORD dwFlags,
                           LPWSTR lpOutString, INT uCountOut, UINT *lpOrder, WORD **lpGlyphs, INT* cGlyphs ) DECLSPEC_HIDDEN;
 
 /* bitblt.c */
+extern DWORD convert_bits( const BITMAPINFO *src_info, struct bitblt_coords *src,
+                           BITMAPINFO *dst_info, struct gdi_image_bits *bits, BOOL add_alpha ) DECLSPEC_HIDDEN;
 extern BOOL intersect_vis_rectangles( struct bitblt_coords *dst, struct bitblt_coords *src ) DECLSPEC_HIDDEN;
+extern DWORD stretch_bits( const BITMAPINFO *src_info, struct bitblt_coords *src,
+                           BITMAPINFO *dst_info, struct bitblt_coords *dst,
+                           struct gdi_image_bits *bits, int mode ) DECLSPEC_HIDDEN;
 
 /* bitmap.c */
 extern void get_ddb_bitmapinfo( BITMAPOBJ *bmp, BITMAPINFO *info ) DECLSPEC_HIDDEN;