ui/gfx/path_gtk.cc

   1 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "ui/gfx/path.h"
   6
   7 #include <gdk/gdk.h>
   8
   9 #include "base/command_line.h"
  10 #include "base/memory/scoped_ptr.h"
  11
  12 namespace gfx {
  13
  14 GdkRegion* Path::CreateNativeRegion() const {
  15   int point_count = getPoints(NULL, 0);
  16   if (point_count <= 1) {
  17     // NOTE: ideally this would return gdk_empty_region, but that returns a
  18     // region with nothing in it.
  19     return NULL;
  20   }
  21
  22   scoped_array<SkPoint> points(new SkPoint[point_count]);
  23   getPoints(points.get(), point_count);
  24
  25   scoped_array<GdkPoint> gdk_points(new GdkPoint[point_count]);
  26   for (int i = 0; i < point_count; ++i) {
  27     gdk_points[i].x = SkScalarRound(points[i].fX);
  28     gdk_points[i].y = SkScalarRound(points[i].fY);
  29   }
  30
  31   return gdk_region_polygon(gdk_points.get(), point_count, GDK_EVEN_ODD_RULE);
  32 }
  33
  34 // static
  35 NativeRegion Path::IntersectRegions(NativeRegion r1, NativeRegion r2) {
  36   GdkRegion* copy = gdk_region_copy(r1);
  37   gdk_region_intersect(copy, r2);
  38   return copy;
  39 }
  40
  41 // static
  42 NativeRegion Path::CombineRegions(NativeRegion r1, NativeRegion r2) {
  43   GdkRegion* copy = gdk_region_copy(r1);
  44   gdk_region_union(copy, r2);
  45   return copy;
  46 }
  47
  48 // static
  49 NativeRegion Path::SubtractRegion(NativeRegion r1, NativeRegion r2) {
  50   GdkRegion* copy = gdk_region_copy(r1);
  51   gdk_region_subtract(copy, r2);
  52   return copy;
  53 }
  54
  55 }  // namespace gfx