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. 4 5 #ifndef UI_GFX_SKIA_UTIL_H_ 6 #define UI_GFX_SKIA_UTIL_H_ 7 8 #include <string> 9 #include <vector> 10 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" 16 17 class SkBitmap; 18 class SkDrawLooper; 19 20 namespace gfx { 21 22 class ImageSkiaRep; 23 class Rect; 24 class RectF; 25 class ShadowValue; 26 class Transform; 27 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); 34 35 GFX_EXPORT void TransformToFlattenedSkMatrix(const gfx::Transform& transform, 36 SkMatrix* flattened); 37 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 43 // is created. 44 // 45 GFX_EXPORT skia::RefPtr<SkShader> CreateImageRepShader( 46 const gfx::ImageSkiaRep& image_rep, 47 SkShader::TileMode tile_mode, 48 const SkMatrix& local_matrix); 49 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, 53 int end_point, 54 SkColor start_color, 55 SkColor end_color); 56 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 59 // this case. 60 GFX_EXPORT skia::RefPtr<SkDrawLooper> CreateShadowDrawLooper( 61 const std::vector<ShadowValue>& shadows); 62 63 // Returns true if the two bitmaps contain the same pixels. 64 GFX_EXPORT bool BitmapsAreEqual(const SkBitmap& bitmap1, 65 const SkBitmap& bitmap2); 66 67 // Converts Skia ARGB format pixels in |skia| to RGBA. 68 GFX_EXPORT void ConvertSkiaToRGBA(const unsigned char* skia, 69 int pixel_width, 70 unsigned char* rgba); 71 72 } // namespace gfx 73 74 #endif // UI_GFX_SKIA_UTIL_H_ 75