Move skia_utils_mac from base/gfx to skia/ext.

Review URL: http://codereview.chromium.org/12911

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@6302 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 83 insertions, 0 deletions

diff --git a/skia/ext/skia_utils_mac.cc b/skia/ext/skia_utils_mac.cc
new file mode 100644
index 0000000..a7610aa
--- /dev/null
+++ b/skia/ext/skia_utils_mac.cc
@@ -0,0 +1,83 @@
+// 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 "skia/ext/skia_utils_mac.h"
+
+#include "base/logging.h"
+#include "SkMatrix.h"
+#include "SkRect.h"
+
+namespace gfx {
+
+CGAffineTransform SkMatrixToCGAffineTransform(const SkMatrix& matrix) {
+  // CGAffineTransforms don't support perspective transforms, so make sure
+  // we don't get those.
+  DCHECK(matrix[SkMatrix::kMPersp0] == 0.0f);
+  DCHECK(matrix[SkMatrix::kMPersp1] == 0.0f);
+  DCHECK(matrix[SkMatrix::kMPersp2] == 1.0f);
+  
+  return CGAffineTransformMake(matrix[SkMatrix::kMScaleX],
+                               matrix[SkMatrix::kMSkewY],
+                               matrix[SkMatrix::kMSkewX],
+                               matrix[SkMatrix::kMScaleY],
+                               matrix[SkMatrix::kMTransX],
+                               matrix[SkMatrix::kMTransY]);
+}
+  
+SkIRect CGRectToSkIRect(const CGRect& rect) {
+  SkIRect sk_rect = {
+    SkScalarRound(rect.origin.x),
+    SkScalarRound(rect.origin.y),
+    SkScalarRound(rect.origin.x + rect.size.width),
+    SkScalarRound(rect.origin.y + rect.size.height)
+  };
+  return sk_rect;
+}
+
+SkRect CGRectToSkRect(const CGRect& rect) {
+  SkRect sk_rect = {
+    rect.origin.x,
+    rect.origin.y,
+    rect.origin.x + rect.size.width,
+    rect.origin.y + rect.size.height,
+  };
+  return sk_rect;
+}
+  
+CGRect SkIRectToCGRect(const SkIRect& rect) {
+  CGRect cg_rect = {
+    { rect.fLeft, rect.fTop },
+    { rect.fRight - rect.fLeft, rect.fBottom - rect.fTop }
+  };
+  return cg_rect;
+} 
+
+CGRect SkRectToCGRect(const SkRect& rect) {
+  CGRect cg_rect = {
+    { rect.fLeft, rect.fTop },
+    { rect.fRight - rect.fLeft, rect.fBottom - rect.fTop }
+  };
+  return cg_rect;
+}
+
+// Converts CGColorRef to the ARGB layout Skia expects.
+SkColor CGColorRefToSkColor(CGColorRef color) {
+  DCHECK(CGColorGetNumberOfComponents(color) == 4);
+  const CGFloat *components = CGColorGetComponents(color);
+  return SkColorSetARGB(SkScalarRound(255.0 * components[3]), // alpha
+                        SkScalarRound(255.0 * components[0]), // red
+                        SkScalarRound(255.0 * components[1]), // green
+                        SkScalarRound(255.0 * components[2])); // blue
+}
+
+// Converts ARGB to CGColorRef.
+CGColorRef SkColorToCGColorRef(SkColor color) {
+  return CGColorCreateGenericRGB(SkColorGetR(color) / 255.0,
+                                 SkColorGetG(color) / 255.0,
+                                 SkColorGetB(color) / 255.0,
+                                 SkColorGetA(color) / 255.0);
+}
+
+}  // namespace gfx
+