[CLOSED] Big patch.

ui/gfx/gdi_util.cc

Index: ui/gfx/gdi_util.cc
diff --git a/ui/gfx/gdi_util.cc b/ui/gfx/gdi_util.cc
index 13f141ae8028eb619541353e08b16f82e8ec9d55..88c09355a28fc8de7a600eaba6a3137c94e57b80 100644
--- a/ui/gfx/gdi_util.cc
+++ b/ui/gfx/gdi_util.cc
@@ -4,6 +4,7 @@
 
 #include "ui/gfx/gdi_util.h"
 
+#include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 
 namespace gfx {
@@ -28,7 +29,6 @@ void CreateBitmapHeaderWithColorDepth(int width, int height, int color_depth,
   hdr->biClrImportant = 0;
 }
 
-
 void CreateBitmapV4Header(int width, int height, BITMAPV4HEADER* hdr) {
   // Because bmp v4 header is just an extension, we just create a v3 header and
   // copy the bits over to the v4 header.
@@ -119,4 +119,27 @@ bool ScaleDC(HDC dc, double scale_factor) {
   return !!ModifyWorldTransform(dc, &xform, MWT_LEFTMULTIPLY);
 }
 
+void StretchDIBits(HDC hdc, int dest_x, int dest_y, int dest_w, int dest_h,
+                   int src_x, int src_y, int src_w, int src_h, void* pixels,
+                   const BITMAPINFO* bitmap_info) {
+  // When blitting a rectangle that touches the bottom, left corner of the
+  // bitmap, StretchDIBits looks at it top-down!  For more details, see
+  // http://wiki.allegro.cc/index.php?title=StretchDIBits.
+  int rv;
+  int bitmap_h = -bitmap_info->bmiHeader.biHeight;
+  int bottom_up_src_y = bitmap_h - src_y - src_h;
+  if (bottom_up_src_y == 0 && src_x == 0 && src_h != bitmap_h) {
+    rv = ::StretchDIBits(hdc,
+                         dest_x, dest_h + dest_y - 1, dest_w, -dest_h,
+                         src_x, bitmap_h - src_y + 1, src_w, -src_h,
+                         pixels, bitmap_info, DIB_RGB_COLORS, SRCCOPY);
+  } else {
+    rv = ::StretchDIBits(hdc,
+                         dest_x, dest_y, dest_w, dest_h,
+                         src_x, bottom_up_src_y, src_w, src_h,
+                         pixels, bitmap_info, DIB_RGB_COLORS, SRCCOPY);
+  }
+  DCHECK(rv != GDI_ERROR);
+}
+
 }  // namespace gfx