Aura: Adds custom cursors for drag and drop.

ui/base/x/x11_util.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // This file defines utility functions for X11 (Linux only). This code has been
 // ported from XCB since we can't use XCB on Ubuntu while its 32-bit support
 // remains woefully incomplete.
 
 #include "ui/base/x/x11_util.h"
 
@@ skipping 19 matching lines @@
 #include "ui/gfx/rect.h"
 #include "ui/gfx/size.h"
 
 #if defined(OS_FREEBSD)
 #include <sys/sysctl.h>
 #include <sys/types.h>
 #endif
 
 #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)
 #include <gdk/gdk.h>
 #include <gdk/gdkx.h>
 #include <gtk/gtk.h>
 #include "ui/base/gtk/gdk_x_compat.h"
 #include "ui/base/gtk/gtk_compat.h"
 #else
 // TODO(sad): Use the new way of handling X errors when
@@ skipping 354 matching lines @@
   return XCustomCursorCache::GetInstance()->InstallCustomCursor(image);
 }
 
 void RefCustomXCursor(::Cursor cursor) {
   XCustomCursorCache::GetInstance()->Ref(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() {
   return DefaultRootWindow(GetXDisplay());
 }
 
 bool GetCurrentDesktop(int* desktop) {
   return GetIntProperty(GetX11RootWindow(), "_NET_CURRENT_DESKTOP", desktop);
 }
 
@@ skipping 802 matching lines @@
       << "request_code " << static_cast<int>(error_event.request_code) << ", "
       << "minor_code " << static_cast<int>(error_event.minor_code)
       << " (" << request_str << ")";
 }
 
 // ----------------------------------------------------------------------------
 // End of x11_util_internal.h
 
 
 }  // namespace ui