Implement gfx::Path on GTK.

Review URL: http://codereview.chromium.org/28297

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@10696 0039d316-1c4b-4281-b951-d872f2087c98

3 files changed, 47 insertions, 16 deletions

diff --git a/chrome/common/gfx/path.h b/chrome/common/gfx/path.h
index c23ecd1..5003132 100644
--- a/chrome/common/gfx/path.h
+++ b/chrome/common/gfx/path.h
@@ -2,29 +2,39 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef CHROME_COMMON_GFX_CHROME_PATH_H__
-#define CHROME_COMMON_GFX_CHROME_PATH_H__
+#ifndef CHROME_COMMON_GFX_CHROME_PATH_H_
+#define CHROME_COMMON_GFX_CHROME_PATH_H_
 
+#include "base/basictypes.h"
+
+#if defined(OS_WIN)
 #include <windows.h>
+#elif defined(OS_LINUX)
+typedef struct _GdkRegion GdkRegion;
+#endif
 
-#include "base/basictypes.h"
 #include "SkPath.h"
 
 namespace gfx {
 
 class Path : public SkPath {
  public:
-  Path();
+  Path() : SkPath() { moveTo(0, 0); }
 
+#if defined(OS_WIN)
   // Creates a HRGN from the path. The caller is responsible for freeing
-  // resources used by this region.
+  // resources used by this region.  This only supports polygon paths.
   HRGN CreateHRGN() const;
+#elif defined(OS_LINUX)
+  // Creates a Gdkregion from the path. The caller is responsible for freeing
+  // resources used by this region.  This only supports polygon paths.
+  GdkRegion* CreateGdkRegion() const;
+#endif
 
  private:
-  DISALLOW_EVIL_CONSTRUCTORS(Path);
+  DISALLOW_COPY_AND_ASSIGN(Path);
 };
 
 }
 
-#endif  // #ifndef CHROME_COMMON_GFX_CHROME_PATH_H__
-
+#endif  // #ifndef CHROME_COMMON_GFX_CHROME_PATH_H_
diff --git a/chrome/common/gfx/path_gtk.cc b/chrome/common/gfx/path_gtk.cc
new file mode 100644
index 0000000..aeab76f
--- /dev/null
+++ b/chrome/common/gfx/path_gtk.cc
@@ -0,0 +1,27 @@
+// Copyright (c) 2006-2008 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.
+
+#include "chrome/common/gfx/path.h"
+
+#include <gdk/gdk.h>
+
+#include "base/scoped_ptr.h"
+
+namespace gfx {
+
+GdkRegion* Path::CreateGdkRegion() const {
+  int point_count = getPoints(NULL, 0);
+  scoped_array<SkPoint> points(new SkPoint[point_count]);
+  getPoints(points.get(), point_count);
+
+  scoped_array<GdkPoint> gdk_points(new GdkPoint[point_count]);
+  for (int i = 0; i < point_count; ++i) {
+    gdk_points[i].x = SkScalarRound(points[i].fX);
+    gdk_points[i].y = SkScalarRound(points[i].fY);
+  }
+
+  return gdk_region_polygon(gdk_points.get(), point_count, GDK_EVEN_ODD_RULE);
+}
+
+}  // namespace gfx
diff --git a/chrome/common/gfx/path.cc b/chrome/common/gfx/path_win.cc
index 43efc34..aa2fe02 100644
--- a/chrome/common/gfx/path.cc
+++ b/chrome/common/gfx/path_win.cc
@@ -8,10 +8,6 @@
 
 namespace gfx {
 
-Path::Path() : SkPath() {
-  moveTo(0, 0);
-}
-
 HRGN Path::CreateHRGN() const {
   int point_count = getPoints(NULL, 0);
   scoped_array<SkPoint> points(new SkPoint[point_count]);
@@ -21,10 +17,8 @@ HRGN Path::CreateHRGN() const {
     windows_points[i].x = SkScalarRound(points[i].fX);
     windows_points[i].y = SkScalarRound(points[i].fY);
   }
-  HRGN region = ::CreatePolygonRgn(windows_points.get(), point_count, ALTERNATE);
 
-  return region;
+  return ::CreatePolygonRgn(windows_points.get(), point_count, ALTERNATE);
 }
 
-};
-
+}  // namespace gfx