Aura: Adds custom cursors for drag and drop.

ui/base/x/x11_util.cc

Index: ui/base/x/x11_util.cc
diff --git a/ui/base/x/x11_util.cc b/ui/base/x/x11_util.cc
index 5df42c04eb09c35354edd93887f881021781dbd3..e90a303f9b6cab8ee5b7fcc45cca5bab0cc1556a 100644
--- a/ui/base/x/x11_util.cc
+++ b/ui/base/x/x11_util.cc
@@ -37,6 +37,8 @@
 
 #if defined(USE_AURA)
 #include <X11/Xcursor/Xcursor.h>
+#include "third_party/skia/include/core/SkBitmap.h"
+#include "third_party/skia/include/core/SkUnPreMultiply.h"
 #endif
 
 #if defined(TOOLKIT_GTK)
@@ -411,6 +413,34 @@ void RefCustomXCursor(::Cursor cursor) {
 void UnrefCustomXCursor(::Cursor cursor) {
   XCustomCursorCache::GetInstance()->Unref(cursor);
 }
+
+XcursorImage* SkBitmapToXcursorImage(const SkBitmap* bitmap,
+                                     const gfx::Point& hotspot) {
+  DCHECK(bitmap->config() == SkBitmap::kARGB_8888_Config);
+  XcursorImage* image = XcursorImageCreate(bitmap->width(), bitmap->height());

[sky, 2012/05/03 21:09:44]

Can you move ConvertSkiatoRGBA to a common place?

[varunjain, 2012/05/03 22:12:20]

Done.

+  image->xhot = hotspot.x();
+  image->yhot = hotspot.y();
+  uint32* pixels = image->pixels;
+
+  if (bitmap->width() && bitmap->height()) {
+    bitmap->lockPixels();
+    int height = bitmap->height();
+    int width = bitmap->width();
+    for (int y = 0, i = 0; y < height; y++) {
+      for (int x = 0; x < width; x++) {
+        uint32 pixel = bitmap->getAddr32(0, y)[x];
+        int alpha = SkColorGetA(pixel);
+        if (alpha != 0 && alpha != 255)
+          pixels[i] = SkUnPreMultiply::PMColorToColor(pixel);
+        else
+          pixels[i] = pixel;
+        ++i;
+      }
+    }
+    bitmap->unlockPixels();
+  }
+  return image;
+}
 #endif
 
 XID GetX11RootWindow() {