2 * Copyright 2008 The Android Open Source Project
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
9 #ifndef SkBlurDrawLooper_DEFINED
10 #define SkBlurDrawLooper_DEFINED
12 #include "SkDrawLooper.h"
18 /** \class SkBlurDrawLooper
19 This class draws a shadow of the object (possibly offset), and then draws
20 the original object in its original position.
21 should there be an option to just draw the shadow/blur layer? webkit?
23 class SK_API SkBlurDrawLooper : public SkDrawLooper {
26 kNone_BlurFlag = 0x00,
28 The blur layer's dx/dy/radius aren't affected by the canvas
31 kIgnoreTransform_BlurFlag = 0x01,
32 kOverrideColor_BlurFlag = 0x02,
33 kHighQuality_BlurFlag = 0x04,
34 /** mask for all blur flags */
38 SkBlurDrawLooper(SkColor color, SkScalar sigma, SkScalar dx, SkScalar dy,
39 uint32_t flags = kNone_BlurFlag);
41 // SK_ATTR_DEPRECATED("use sigma version")
42 SkBlurDrawLooper(SkScalar radius, SkScalar dx, SkScalar dy, SkColor color,
43 uint32_t flags = kNone_BlurFlag);
44 virtual ~SkBlurDrawLooper();
46 virtual SkDrawLooper::Context* createContext(SkCanvas*, void* storage) const SK_OVERRIDE;
48 virtual size_t contextSize() const SK_OVERRIDE { return sizeof(BlurDrawLooperContext); }
50 SK_TO_STRING_OVERRIDE()
51 SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkBlurDrawLooper)
54 SkBlurDrawLooper(SkReadBuffer&);
55 virtual void flatten(SkWriteBuffer&) const SK_OVERRIDE;
59 SkColorFilter* fColorFilter;
70 class BlurDrawLooperContext : public SkDrawLooper::Context {
72 explicit BlurDrawLooperContext(const SkBlurDrawLooper* looper);
74 virtual bool next(SkCanvas* canvas, SkPaint* paint) SK_OVERRIDE;
77 const SkBlurDrawLooper* fLooper;
81 void init(SkScalar sigma, SkScalar dx, SkScalar dy, SkColor color, uint32_t flags);
83 typedef SkDrawLooper INHERITED;