gdi32: Implement GetNearestColor in the DIB driver.

dlls/gdi32/dibdrv/dc.c

@@ -530,7 +530,7 @@ const struct gdi_dc_funcs dib_driver =
     NULL,                               /* pGetICMProfile */
     dibdrv_GetImage,                    /* pGetImage */
     NULL,                               /* pGetKerningPairs */
-    NULL,                               /* pGetNearestColor */
+    dibdrv_GetNearestColor,             /* pGetNearestColor */
     NULL,                               /* pGetOutlineTextMetrics */
     dibdrv_GetPixel,                    /* pGetPixel */
     NULL,                               /* pGetPixelFormat */

dlls/gdi32/dibdrv/dibdrv.h

@@ -124,6 +124,7 @@ extern BOOL     dibdrv_ExtTextOut( PHYSDEV dev, INT x, INT y, UINT flags,
                                    const RECT *rect, LPCWSTR str, UINT count, const INT *dx ) DECLSPEC_HIDDEN;
 extern DWORD    dibdrv_GetImage( PHYSDEV dev, HBITMAP hbitmap, BITMAPINFO *info,
                                  struct gdi_image_bits *bits, struct bitblt_coords *src ) DECLSPEC_HIDDEN;
+extern COLORREF dibdrv_GetNearestColor( PHYSDEV dev, COLORREF color ) DECLSPEC_HIDDEN;
 extern COLORREF dibdrv_GetPixel( PHYSDEV dev, INT x, INT y ) DECLSPEC_HIDDEN;
 extern BOOL     dibdrv_LineTo( PHYSDEV dev, INT x, INT y ) DECLSPEC_HIDDEN;
 extern BOOL     dibdrv_PatBlt( PHYSDEV dev, struct bitblt_coords *dst, DWORD rop ) DECLSPEC_HIDDEN;

dlls/gdi32/dibdrv/graphics.c

@@ -392,6 +392,20 @@ BOOL dibdrv_ExtTextOut( PHYSDEV dev, INT x, INT y, UINT flags,
 }
 
 /***********************************************************************
+ *           dibdrv_GetNearestColor
+ */
+COLORREF dibdrv_GetNearestColor( PHYSDEV dev, COLORREF color )
+{
+    dibdrv_physdev *pdev = get_dibdrv_pdev( dev );
+    DWORD pixel;
+
+    TRACE( "(%p, %08x)\n", dev, color );
+
+    pixel = get_pixel_color( pdev, color, FALSE );
+    return pdev->dib.funcs->pixel_to_colorref( &pdev->dib, pixel );
+}
+
+/***********************************************************************
  *           dibdrv_GetPixel
  */
 COLORREF dibdrv_GetPixel( PHYSDEV dev, INT x, INT y )

dlls/gdi32/tests/bitmap.c

@@ -346,6 +346,8 @@ static void test_dib_info(HBITMAP hbm, const void *bits, const BITMAPINFOHEADER
     ok(c == exp, "SetPixel failed: got 0x%06x expected 0x%06x\n", c, (UINT)exp); \
     c = GetPixel(hdc, 0, 0); \
     ok(c == exp, "GetPixel failed: got 0x%06x expected 0x%06x\n", c, (UINT)exp); \
+    c = GetNearestColor(hdc, color); \
+    ok(c == exp, "GetNearestColor failed: got 0x%06x expected 0x%06x\n", c, (UINT)exp); \
 }
 
 static void test_dib_bits_access( HBITMAP hdib, void *bits )