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/*
* 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 SkBlurMaskFilter_DEFINED
#define SkBlurMaskFilter_DEFINED
// we include this since our callers will need to at least be able to ref/unref
#include "SkMaskFilter.h"
#include "SkRect.h"
#include "SkScalar.h"
#include "SkBlurTypes.h"
class SkRRect;
class SK_API SkBlurMaskFilter {
public:
enum BlurFlags {
kNone_BlurFlag = 0x00,
/** The blur layer's radius is not affected by transforms */
kIgnoreTransform_BlurFlag = 0x01,
/** Use a smother, higher qulity blur algorithm */
kHighQuality_BlurFlag = 0x02,
/** mask for all blur flags */
kAll_BlurFlag = 0x03
};
/** Create a blur maskfilter.
* @param style The SkBlurStyle to use
* @param sigma Standard deviation of the Gaussian blur to apply. Must be > 0.
* @param occluder The rect for which no pixels need be drawn (b.c. it will be overdrawn
* with some opaque object. This is just a hint which backends are free to
* ignore.
* @param flags Flags to use - defaults to none
* @return The new blur maskfilter
*/
static sk_sp<SkMaskFilter> Make(SkBlurStyle style, SkScalar sigma,
const SkRect& occluder, uint32_t flags = kNone_BlurFlag);
static sk_sp<SkMaskFilter> Make(SkBlurStyle style, SkScalar sigma,
uint32_t flags = kNone_BlurFlag) {
return Make(style, sigma, SkRect::MakeEmpty(), flags);
}
#ifdef SK_SUPPORT_LEGACY_EMBOSSMASKFILTER
/** Create an emboss maskfilter
@param blurSigma standard deviation of the Gaussian blur to apply
before applying lighting (e.g. 3)
@param direction array of 3 scalars [x, y, z] specifying the direction of the light source
@param ambient 0...1 amount of ambient light
@param specular coefficient for specular highlights (e.g. 8)
@return the emboss maskfilter
*/
static sk_sp<SkMaskFilter> MakeEmboss(SkScalar blurSigma, const SkScalar direction[3],
SkScalar ambient, SkScalar specular);
#endif
private:
SkBlurMaskFilter(); // can't be instantiated
};
#endif
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