d6aeb6dc8f
BUG=skia:2779 R=robertphillips@google.com, mtklein@google.com, reed@android.com, bsalomon@google.com Author: bungeman@google.com Review URL: https://codereview.chromium.org/419113002
86 lines
2.2 KiB
C++
86 lines
2.2 KiB
C++
/*
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* Copyright 2010 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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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 "GrTypes.h"
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#include "SkDescriptor.h"
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class SkPath;
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/*
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* Wrapper class to turn a font cache descriptor into a key
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* for GrFontScaler-related lookups
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*/
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class GrFontDescKey : public SkRefCnt {
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public:
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SK_DECLARE_INST_COUNT(GrFontDescKey)
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typedef uint32_t Hash;
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explicit GrFontDescKey(const SkDescriptor& desc);
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virtual ~GrFontDescKey();
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Hash getHash() const { return fHash; }
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bool operator<(const GrFontDescKey& rh) const {
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return fHash < rh.fHash || (fHash == rh.fHash && this->lt(rh));
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}
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bool operator==(const GrFontDescKey& rh) const {
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return fHash == rh.fHash && this->eq(rh);
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}
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private:
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// helper functions for comparisons
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bool lt(const GrFontDescKey& rh) const;
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bool eq(const GrFontDescKey& rh) const;
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SkDescriptor* fDesc;
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enum {
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kMaxStorageInts = 16
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};
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uint32_t fStorage[kMaxStorageInts];
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const Hash fHash;
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typedef SkRefCnt INHERITED;
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};
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/*
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* This is Gr's interface to the host platform's font scaler.
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*
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* The client is responsible for instantiating this. The instance is created
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* for a specific font+size+matrix.
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*/
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class GrFontScaler : public SkRefCnt {
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public:
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SK_DECLARE_INST_COUNT(GrFontScaler)
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explicit GrFontScaler(SkGlyphCache* strike);
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virtual ~GrFontScaler();
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const GrFontDescKey* getKey();
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GrMaskFormat getMaskFormat();
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bool getPackedGlyphBounds(GrGlyph::PackedID, SkIRect* bounds);
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bool getPackedGlyphImage(GrGlyph::PackedID, int width, int height,
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int rowBytes, void* image);
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bool getPackedGlyphDFBounds(GrGlyph::PackedID, SkIRect* bounds);
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bool getPackedGlyphDFImage(GrGlyph::PackedID, int width, int height,
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void* image);
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bool getGlyphPath(uint16_t glyphID, SkPath*);
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private:
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SkGlyphCache* fStrike;
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GrFontDescKey* fKey;
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typedef SkRefCnt INHERITED;
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};
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#endif
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