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/*
* Copyright (C) 2006 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#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 "SkScalar.h"
class SkBlurMaskFilter {
public:
enum BlurStyle {
kNormal_BlurStyle, //!< fuzzy inside and outside
kSolid_BlurStyle, //!< solid inside, fuzzy outside
kOuter_BlurStyle, //!< nothing inside, fuzzy outside
kInner_BlurStyle, //!< fuzzy inside, nothing outside
kBlurStyleCount
};
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 radius The radius to extend the blur from the original mask. Must be > 0.
@param style The BlurStyle to use
@param flags Flags to use - defaults to none
@return The new blur maskfilter
*/
static SkMaskFilter* Create(SkScalar radius, BlurStyle style,
uint32_t flags = kNone_BlurFlag);
/** Create an emboss maskfilter
@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)
@param blurRadius amount to blur before applying lighting (e.g. 3)
@return the emboss maskfilter
*/
static SkMaskFilter* CreateEmboss( const SkScalar direction[3],
SkScalar ambient, SkScalar specular,
SkScalar blurRadius);
private:
SkBlurMaskFilter(); // can't be instantiated
};
#endif
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