2012-04-19 14:35:52 +08:00
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/*
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Copyright 2010 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 GrFontScaler_DEFINED
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#define GrFontScaler_DEFINED
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#include "GrGlyph.h"
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#include "GrKey.h"
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class SkPath;
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/**
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* This is a virtual base class which Gr's interface to the host platform's
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* font scaler.
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*
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* The client is responsible for subclassing, and instantiating this. The
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* instance is create for a specific font+size+matrix.
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*/
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class GrFontScaler : public GrRefCnt {
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public:
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virtual const GrKey* getKey() = 0;
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virtual GrMaskFormat getMaskFormat() = 0;
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virtual bool getPackedGlyphBounds(GrGlyph::PackedID, GrIRect* bounds) = 0;
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virtual bool getPackedGlyphImage(GrGlyph::PackedID, int width, int height,
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int rowBytes, void* image) = 0;
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virtual bool getGlyphPath(uint16_t glyphID, SkPath*) = 0;
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};
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#endif
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