1 // Copyright (c) 2012 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.
5 #ifndef UI_GFX_SKIA_UTIL_H_
6 #define UI_GFX_SKIA_UTIL_H_
11 #include "skia/ext/refptr.h"
12 #include "third_party/skia/include/core/SkColor.h"
13 #include "third_party/skia/include/core/SkRect.h"
14 #include "third_party/skia/include/core/SkShader.h"
15 #include "ui/gfx/gfx_export.h"
28 // Convert between Skia and gfx rect types.
29 GFX_EXPORT SkRect RectToSkRect(const Rect& rect);
30 GFX_EXPORT SkIRect RectToSkIRect(const Rect& rect);
31 GFX_EXPORT Rect SkIRectToRect(const SkIRect& rect);
32 GFX_EXPORT SkRect RectFToSkRect(const RectF& rect);
33 GFX_EXPORT RectF SkRectToRectF(const SkRect& rect);
35 GFX_EXPORT void TransformToFlattenedSkMatrix(const gfx::Transform& transform,
38 // Creates a bitmap shader for the image rep with the image rep's scale factor.
39 // Sets the created shader's local matrix such that it displays the image rep at
40 // the correct scale factor.
41 // The shader's local matrix should not be changed after the shader is created.
42 // TODO(pkotwicz): Allow shader's local matrix to be changed after the shader
45 GFX_EXPORT skia::RefPtr<SkShader> CreateImageRepShader(
46 const gfx::ImageSkiaRep& image_rep,
47 SkShader::TileMode tile_mode,
48 const SkMatrix& local_matrix);
50 // Creates a vertical gradient shader. The caller owns the shader.
51 // Example usage to avoid leaks:
52 GFX_EXPORT skia::RefPtr<SkShader> CreateGradientShader(int start_point,
57 // Creates a draw looper to generate |shadows|. The caller owns the draw looper.
58 // NULL is returned if |shadows| is empty since no draw looper is needed in
60 GFX_EXPORT skia::RefPtr<SkDrawLooper> CreateShadowDrawLooper(
61 const std::vector<ShadowValue>& shadows);
63 // Returns true if the two bitmaps contain the same pixels.
64 GFX_EXPORT bool BitmapsAreEqual(const SkBitmap& bitmap1,
65 const SkBitmap& bitmap2);
67 // Converts Skia ARGB format pixels in |skia| to RGBA.
68 GFX_EXPORT void ConvertSkiaToRGBA(const unsigned char* skia,
74 #endif // UI_GFX_SKIA_UTIL_H_