1 /* 2 * Copyright 2013 Google Inc. 3 * 4 * Use of this source code is governed by a BSD-style license that can be 5 * found in the LICENSE file. 6 */ 7 8 #ifndef SkPaintPriv_DEFINED 9 #define SkPaintPriv_DEFINED 10 11 #include "SkTypes.h" 12 13 class SkBitmap; 14 class SkImage; 15 class SkPaint; 16 17 class SkPaintPriv { 18 public: 19 enum ShaderOverrideOpacity { 20 kNone_ShaderOverrideOpacity, //!< there is no overriding shader (bitmap or image) 21 kOpaque_ShaderOverrideOpacity, //!< the overriding shader is opaque 22 kNotOpaque_ShaderOverrideOpacity, //!< the overriding shader may not be opaque 23 }; 24 25 /** 26 * Returns true if drawing with this paint (or nullptr) will ovewrite all affected pixels. 27 * 28 * Note: returns conservative true, meaning it may return false even though the paint might 29 * in fact overwrite its pixels. 30 */ 31 static bool Overwrites(const SkPaint* paint, ShaderOverrideOpacity); 32 33 static bool Overwrites(const SkPaint& paint) { 34 return Overwrites(&paint, kNone_ShaderOverrideOpacity); 35 } 36 37 /** 38 * Returns true if drawing this bitmap with this paint (or nullptr) will ovewrite all affected 39 * pixels. 40 */ 41 static bool Overwrites(const SkBitmap&, const SkPaint* paint); 42 43 /** 44 * Returns true if drawing this image with this paint (or nullptr) will ovewrite all affected 45 * pixels. 46 */ 47 static bool Overwrites(const SkImage*, const SkPaint* paint); 48 }; 49 50 #endif 51
