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+// Copyright 2008, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+// * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+// * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+// * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#include "base/gfx/skia_utils.h"
+
+#include "base/logging.h"
+#include "SkRect.h"
+#include "SkGradientShader.h"
+
+namespace {
+
+COMPILE_ASSERT(offsetof(RECT, left) == offsetof(SkIRect, fLeft), o1);
+COMPILE_ASSERT(offsetof(RECT, top) == offsetof(SkIRect, fTop), o2);
+COMPILE_ASSERT(offsetof(RECT, right) == offsetof(SkIRect, fRight), o3);
+COMPILE_ASSERT(offsetof(RECT, bottom) == offsetof(SkIRect, fBottom), o4);
+COMPILE_ASSERT(sizeof(RECT().left) == sizeof(SkIRect().fLeft), o5);
+COMPILE_ASSERT(sizeof(RECT().top) == sizeof(SkIRect().fTop), o6);
+COMPILE_ASSERT(sizeof(RECT().right) == sizeof(SkIRect().fRight), o7);
+COMPILE_ASSERT(sizeof(RECT().bottom) == sizeof(SkIRect().fBottom), o8);
+COMPILE_ASSERT(sizeof(RECT) == sizeof(SkIRect), o9);
+
+} // namespace
+
+namespace gfx {
+
+POINT SkPointToPOINT(const SkPoint& point) {
+ POINT win_point = { SkScalarRound(point.fX), SkScalarRound(point.fY) };
+ return win_point;
+}
+
+SkRect RECTToSkRect(const RECT& rect) {
+ SkRect sk_rect = { SkIntToScalar(rect.left), SkIntToScalar(rect.top),
+ SkIntToScalar(rect.right), SkIntToScalar(rect.bottom) };
+ return sk_rect;
+}
+
+SkShader* CreateGradientShader(int start_point,
+ int end_point,
+ SkColor start_color,
+ SkColor end_color) {
+ SkColor grad_colors[2] = { start_color, end_color};
+ SkPoint grad_points[2];
+ grad_points[0].set(SkIntToScalar(0), SkIntToScalar(start_point));
+ grad_points[1].set(SkIntToScalar(0), SkIntToScalar(end_point));
+
+ return SkGradientShader::CreateLinear(
+ grad_points, grad_colors, NULL, 2, SkShader::kRepeat_TileMode);
+}
+
+
+SkColor COLORREFToSkColor(COLORREF color) {
+#ifndef _MSC_VER
+ return SkColorSetRGB(GetRValue(color), GetGValue(color), GetBValue(color));
+#else
+ // ARGB = 0xFF000000 | ((0BGR -> RGB0) >> 8)
+ return 0xFF000000u | (_byteswap_ulong(color) >> 8);
+#endif
+}
+
+COLORREF SkColorToCOLORREF(SkColor color) {
+ // Currently, Alpha is always 255 or the color is 0 so there is no need to
+ // demultiply the channels. If this DCHECK() is ever hit, the full
+ // (SkColorGetX(color) * 255 / a) will have to be added in the conversion.
+ DCHECK((0xFF == SkColorGetA(color)) || (0 == color));
+#ifndef _MSC_VER
+ return RGB(SkColorGetR(color), SkColorGetG(color), SkColorGetB(color));
+#else
+ // 0BGR = ((ARGB -> BGRA) >> 8)
+ return (_byteswap_ulong(color) >> 8);
+#endif
+}
+
+} // namespace gfx