1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/skia/trunk/include/effects/SkBlurDrawLooper.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,86 @@
1.4 +/*
1.5 + * Copyright 2008 The Android Open Source Project
1.6 + *
1.7 + * Use of this source code is governed by a BSD-style license that can be
1.8 + * found in the LICENSE file.
1.9 + */
1.10 +
1.11 +
1.12 +#ifndef SkBlurDrawLooper_DEFINED
1.13 +#define SkBlurDrawLooper_DEFINED
1.14 +
1.15 +#include "SkDrawLooper.h"
1.16 +#include "SkColor.h"
1.17 +
1.18 +class SkMaskFilter;
1.19 +class SkColorFilter;
1.20 +
1.21 +/** \class SkBlurDrawLooper
1.22 + This class draws a shadow of the object (possibly offset), and then draws
1.23 + the original object in its original position.
1.24 + should there be an option to just draw the shadow/blur layer? webkit?
1.25 +*/
1.26 +class SK_API SkBlurDrawLooper : public SkDrawLooper {
1.27 +public:
1.28 + enum BlurFlags {
1.29 + kNone_BlurFlag = 0x00,
1.30 + /**
1.31 + The blur layer's dx/dy/radius aren't affected by the canvas
1.32 + transform.
1.33 + */
1.34 + kIgnoreTransform_BlurFlag = 0x01,
1.35 + kOverrideColor_BlurFlag = 0x02,
1.36 + kHighQuality_BlurFlag = 0x04,
1.37 + /** mask for all blur flags */
1.38 + kAll_BlurFlag = 0x07
1.39 + };
1.40 +
1.41 + SkBlurDrawLooper(SkColor color, SkScalar sigma, SkScalar dx, SkScalar dy,
1.42 + uint32_t flags = kNone_BlurFlag);
1.43 +
1.44 +// SK_ATTR_DEPRECATED("use sigma version")
1.45 + SkBlurDrawLooper(SkScalar radius, SkScalar dx, SkScalar dy, SkColor color,
1.46 + uint32_t flags = kNone_BlurFlag);
1.47 + virtual ~SkBlurDrawLooper();
1.48 +
1.49 + virtual SkDrawLooper::Context* createContext(SkCanvas*, void* storage) const SK_OVERRIDE;
1.50 +
1.51 + virtual size_t contextSize() const SK_OVERRIDE { return sizeof(BlurDrawLooperContext); }
1.52 +
1.53 + SK_TO_STRING_OVERRIDE()
1.54 + SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkBlurDrawLooper)
1.55 +
1.56 +protected:
1.57 + SkBlurDrawLooper(SkReadBuffer&);
1.58 + virtual void flatten(SkWriteBuffer&) const SK_OVERRIDE;
1.59 +
1.60 +private:
1.61 + SkMaskFilter* fBlur;
1.62 + SkColorFilter* fColorFilter;
1.63 + SkScalar fDx, fDy;
1.64 + SkColor fBlurColor;
1.65 + uint32_t fBlurFlags;
1.66 +
1.67 + enum State {
1.68 + kBeforeEdge,
1.69 + kAfterEdge,
1.70 + kDone
1.71 + };
1.72 +
1.73 + class BlurDrawLooperContext : public SkDrawLooper::Context {
1.74 + public:
1.75 + explicit BlurDrawLooperContext(const SkBlurDrawLooper* looper);
1.76 +
1.77 + virtual bool next(SkCanvas* canvas, SkPaint* paint) SK_OVERRIDE;
1.78 +
1.79 + private:
1.80 + const SkBlurDrawLooper* fLooper;
1.81 + State fState;
1.82 + };
1.83 +
1.84 + void init(SkScalar sigma, SkScalar dx, SkScalar dy, SkColor color, uint32_t flags);
1.85 +
1.86 + typedef SkDrawLooper INHERITED;
1.87 +};
1.88 +
1.89 +#endif
