[CLOSED] In-browser software compositing

content/browser/renderer_host/backing_store_win.cc

Index: content/browser/renderer_host/backing_store_win.cc
diff --git a/content/browser/renderer_host/backing_store_win.cc b/content/browser/renderer_host/backing_store_win.cc
index c9ce07a86bb51564fb08af9a96ac05132395fe6e..e1ceb2a0ed6a4fbbde77131042e2e2e1ccc6fb0a 100644
--- a/content/browser/renderer_host/backing_store_win.cc
+++ b/content/browser/renderer_host/backing_store_win.cc
@@ -46,29 +46,6 @@ HANDLE CreateDIB(HDC dc, int width, int height, int color_depth) {
   return dib;
 }
 
-void CallStretchDIBits(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
 
 BackingStoreWin::BackingStoreWin(RenderWidgetHost* widget,
@@ -151,17 +128,17 @@ void BackingStoreWin::PaintToBackingStore(
     gfx::Rect paint_rect = gfx::IntersectRects(view_rect, copy_rects[i]);
     gfx::Rect pixel_copy_rect = gfx::ToEnclosedRect(
         gfx::ScaleRect(paint_rect, scale_factor));
-    CallStretchDIBits(hdc_,
-                      paint_rect.x(),
-                      paint_rect.y(),
-                      paint_rect.width(),
-                      paint_rect.height(),
-                      pixel_copy_rect.x() - pixel_bitmap_rect.x(),
-                      pixel_copy_rect.y() - pixel_bitmap_rect.y(),
-                      pixel_copy_rect.width(),
-                      pixel_copy_rect.height(),
-                      dib->memory(),
-                      reinterpret_cast<BITMAPINFO*>(&hdr));
+    gfx::StretchDIBits(hdc_,
+                       paint_rect.x(),
+                       paint_rect.y(),
+                       paint_rect.width(),
+                       paint_rect.height(),
+                       pixel_copy_rect.x() - pixel_bitmap_rect.x(),
+                       pixel_copy_rect.y() - pixel_bitmap_rect.y(),
+                       pixel_copy_rect.width(),
+                       pixel_copy_rect.height(),
+                       dib->memory(),
+                       reinterpret_cast<BITMAPINFO*>(&hdr));
   }
 }