ef284a84f5
missing unrefs in megalooper GM missing reset capability in oval renderer This CL also expands the instance counting system to some recently adding classes (e.g., SkFontStyleSet) R=bsalomon@google.com, jvanverth@google.com Author: robertphillips@google.com Review URL: https://chromiumcodereview.appspot.com/18461007 git-svn-id: http://skia.googlecode.com/svn/trunk@10030 2bbb7eff-a529-9590-31e7-b0007b416f81
112 lines
3.9 KiB
C++
112 lines
3.9 KiB
C++
/*
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* Copyright 2013 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 SkFontConfigInterface_DEFINED
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#define SkFontConfigInterface_DEFINED
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#include "SkDataTable.h"
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#include "SkFontStyle.h"
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#include "SkRefCnt.h"
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#include "SkTArray.h"
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#include "SkTypeface.h"
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/**
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* \class SkFontConfigInterface
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*
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* Provides SkFontHost clients with access to fontconfig services. They will
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* access the global instance found in RefGlobal().
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*/
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class SK_API SkFontConfigInterface : public SkRefCnt {
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public:
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SK_DECLARE_INST_COUNT(SkFontConfigInterface)
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/**
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* Returns the global SkFontConfigInterface instance, and if it is not
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* NULL, calls ref() on it. The caller must balance this with a call to
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* unref().
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*/
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static SkFontConfigInterface* RefGlobal();
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/**
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* Replace the current global instance with the specified one, safely
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* ref'ing the new instance, and unref'ing the previous. Returns its
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* parameter (the new global instance).
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*/
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static SkFontConfigInterface* SetGlobal(SkFontConfigInterface*);
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/**
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* This should be treated as private to the impl of SkFontConfigInterface.
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* Callers should not change or expect any particular values. It is meant
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* to be a union of possible storage types to aid the impl.
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*/
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struct FontIdentity {
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FontIdentity() : fID(0), fTTCIndex(0) {}
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bool operator==(const FontIdentity& other) const {
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return fID == other.fID &&
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fTTCIndex == other.fTTCIndex &&
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fString == other.fString;
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}
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bool operator!=(const FontIdentity& other) const {
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return !(*this == other);
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}
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uint32_t fID;
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int32_t fTTCIndex;
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SkString fString;
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SkFontStyle fStyle;
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// If buffer is NULL, just return the number of bytes that would have
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// been written. Will pad contents to a multiple of 4.
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size_t writeToMemory(void* buffer = NULL) const;
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// Recreate from a flattened buffer, returning the number of bytes read.
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size_t readFromMemory(const void* buffer, size_t length);
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};
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/**
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* Given a familyName and style, find the best match.
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*
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* If a match is found, return true and set its outFontIdentifier.
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* If outFamilyName is not null, assign the found familyName to it
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* (which may differ from the requested familyName).
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* If outStyle is not null, assign the found style to it
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* (which may differ from the requested style).
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*
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* If a match is not found, return false, and ignore all out parameters.
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*/
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virtual bool matchFamilyName(const char familyName[],
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SkTypeface::Style requested,
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FontIdentity* outFontIdentifier,
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SkString* outFamilyName,
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SkTypeface::Style* outStyle) = 0;
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/**
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* Given a FontRef, open a stream to access its data, or return null
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* if the FontRef's data is not available. The caller is responsible for
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* calling stream->unref() when it is done accessing the data.
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*/
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virtual SkStream* openStream(const FontIdentity&) = 0;
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/**
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* Return a singleton instance of a direct subclass that calls into
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* libfontconfig. This does not affect the refcnt of the returned instance.
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*/
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static SkFontConfigInterface* GetSingletonDirectInterface();
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// New APIS, which have default impls for now (which do nothing)
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virtual SkDataTable* getFamilyNames() { return SkDataTable::NewEmpty(); }
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virtual bool matchFamilySet(const char inFamilyName[],
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SkString* outFamilyName,
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SkTArray<FontIdentity>*) {
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return false;
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}
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};
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#endif
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