blob: 3fde51b717e5332596f754f1ec5c83decab389b3 [file] [log] [blame]
* Copyright 2006 The Android Open Source Project
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
#ifndef SkMaskFilter_DEFINED
#define SkMaskFilter_DEFINED
#include "include/core/SkBlurTypes.h"
#include "include/core/SkCoverageMode.h"
#include "include/core/SkFlattenable.h"
#include "include/core/SkScalar.h"
class SkMatrix;
struct SkRect;
/** \class SkMaskFilter
SkMaskFilter is the base class for object that perform transformations on
the mask before drawing it. An example subclass is Blur.
class SK_API SkMaskFilter : public SkFlattenable {
/** Create a blur maskfilter.
* @param style The SkBlurStyle to use
* @param sigma Standard deviation of the Gaussian blur to apply. Must be > 0.
* @param respectCTM if true the blur's sigma is modified by the CTM.
* @return The new blur maskfilter
static sk_sp<SkMaskFilter> MakeBlur(SkBlurStyle style, SkScalar sigma,
bool respectCTM = true);
* Returns the approximate bounds that would result from filtering the src rect.
* The actual result may be different, but it should be contained within the
* returned bounds.
SkRect approximateFilteredBounds(const SkRect& src) const;
static sk_sp<SkMaskFilter> Deserialize(const void* data, size_t size,
const SkDeserialProcs* procs = nullptr);
static void RegisterFlattenables();
friend class SkFlattenable;