93 lines
2.9 KiB
C
93 lines
2.9 KiB
C
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/*
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* Copyright (C) 2010 The Android Open Source Project
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*
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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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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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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 SkPDFFont_DEFINED
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#define SkPDFFont_DEFINED
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#include "SkPDFTypes.h"
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#include "SkTDArray.h"
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#include "SkThread.h"
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class SkPaint;
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/** \class SkPDFFont
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A PDF Object class representing a font. The font may have resources
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attached to it in order to embed the font. SkPDFFonts are canonicalized
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so that resource deduplication will only include one copy of a font.
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This class uses the same pattern as SkPDFGraphicState, a static weak
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reference to each instantiated class.
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*/
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class SkPDFFont : public SkPDFDict {
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public:
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virtual ~SkPDFFont();
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virtual void getResources(SkTDArray<SkPDFObject*>* resourceList);
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/* Returns the font ID represented by this class.
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*/
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uint32_t fontID();
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/** Returns true if this font supports glyph IDs above 255.
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*/
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bool multiByteGlyphs();
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/** Covert the specified text to glyph IDs, taking into consideration
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* PDF encodings and return the number of glyphs IDs written.
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*/
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int textToPDFGlyphs(const void* text, size_t byteLength,
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const SkPaint& paint, uint16_t* glyphs,
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size_t glyphsLength) const;
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/** Get the font resource for the passed font ID. The reference count of
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* the object is incremented and it is the caller's responsibility to
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* unreference it when done. This is needed to accommodate the weak
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* reference pattern used when the returned object is new and has no
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* other references.
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* @param paint The SkPaint to emulate.
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*/
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static SkPDFFont* getFontResouceByID(uint32_t fontID);
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private:
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uint32_t fFontID;
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bool fMultiByteGlyphs;
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SkTDArray<SkPDFObject*> fResources;
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class FontRec {
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public:
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SkPDFFont* fFont;
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uint32_t fFontID;
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bool operator==(const FontRec& b) const;
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FontRec(SkPDFFont* font, uint32_t fontID);
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};
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// This should be made a hash table if performance is a problem.
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static SkTDArray<FontRec>& canonicalFonts();
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static SkMutex& canonicalFontsMutex();
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SkPDFFont(uint32_t fontID, bool multiByteGlyphs);
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void populateBuiltinFont(const char fontName[]);
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void populateFont(const char subType[], const char fontName[],
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int firstChar, int lastChar, int widths[],
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SkPDFObject* fontDescriptor);
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static int find(uint32_t fontID);
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};
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#endif
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