Call GdiAlphaBlend directly instead of the AlphaBlend wrapper in msimg32.dll. The wrapper does a few additional santity checks, which I presume GdiAlphaBlend will have to handle anyway. This means we don't depend on msimg32.dll anymore.

Review URL: http://codereview.chromium.org/7813

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@3656 0039d316-1c4b-4281-b951-d872f2087c98

2 files changed, 19 insertions, 18 deletions

diff --git a/base/gfx/bitmap_platform_device_win.cc b/base/gfx/bitmap_platform_device_win.cc
index d7150b1..0df57c2 100644
--- a/base/gfx/bitmap_platform_device_win.cc
+++ b/base/gfx/bitmap_platform_device_win.cc
@@ -376,18 +376,19 @@ void BitmapPlatformDeviceWin::drawToHDC(HDC dc, int x, int y,
            src_rect->top,
            SRCCOPY);
   } else {
+    DCHECK(copy_width != 0 && copy_height != 0);
     BLENDFUNCTION blend_function = {AC_SRC_OVER, 0, 255, AC_SRC_ALPHA};
-    AlphaBlend(dc,
-               x,
-               y,
-               copy_width,
-               copy_height,
-               source_dc,
-               src_rect->left,
-               src_rect->top,
-               copy_width,
-               copy_height,
-               blend_function);
+    GdiAlphaBlend(dc,
+                  x,
+                  y,
+                  copy_width,
+                  copy_height,
+                  source_dc,
+                  src_rect->left,
+                  src_rect->top,
+                  copy_width,
+                  copy_height,
+                  blend_function);
   }
   LoadTransformToDC(source_dc, data_->transform());
 
diff --git a/base/gfx/vector_device.cc b/base/gfx/vector_device.cc
index 7230e2b..26da338 100644
--- a/base/gfx/vector_device.cc
+++ b/base/gfx/vector_device.cc
@@ -583,13 +583,13 @@ void VectorDevice::InternalDrawBitmap(const SkBitmap& bitmap, int x, int y,
     DCHECK(result);
     // Note that this function expect premultiplied colors (!)
     BLENDFUNCTION blend_function = {AC_SRC_OVER, 0, alpha, AC_SRC_ALPHA};
-    result = AlphaBlend(dc,
-                        x, y,  // Destination origin.
-                        src_size_x, src_size_y,  // Destination size.
-                        bitmap_dc,
-                        0, 0,  // Source origin.
-                        src_size_x, src_size_y,  // Source size.
-                        blend_function);
+    result = GdiAlphaBlend(dc,
+                           x, y,  // Destination origin.
+                           src_size_x, src_size_y,  // Destination size.
+                           bitmap_dc,
+                           0, 0,  // Source origin.
+                           src_size_x, src_size_y,  // Source size.
+                           blend_function);
     DCHECK(result);
     result = SetStretchBltMode(dc, previous_mode);
     DCHECK(result);