37a201231b
(i.e. has no pixels at all) git-svn-id: http://skia.googlecode.com/svn/trunk@1792 2bbb7eff-a529-9590-31e7-b0007b416f81
49 lines
1.4 KiB
C++
49 lines
1.4 KiB
C++
/*
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Copyright 2011 Google Inc.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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#ifndef SkEmptyShader_DEFINED
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#define SkEmptyShader_DEFINED
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#include "SkShader.h"
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/**
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* \class SkEmptyShader
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* A Shader that always draws nothing.
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*/
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class SK_API SkEmptyShader : public SkShader {
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public:
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SkEmptyShader();
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virtual uint32_t getFlags();
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virtual uint8_t getSpan16Alpha() const;
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virtual bool setContext(const SkBitmap& device, const SkPaint& paint,
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const SkMatrix& matrix);
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virtual void shadeSpan(int x, int y, SkPMColor span[], int count);
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virtual void shadeSpan16(int x, int y, uint16_t span[], int count);
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virtual void shadeSpanAlpha(int x, int y, uint8_t alpha[], int count);
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protected:
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SkEmptyShader(SkFlattenableReadBuffer&);
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virtual Factory getFactory();
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virtual void flatten(SkFlattenableWriteBuffer&);
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private:
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typedef SkShader INHERITED;
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};
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#endif
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