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/*
* Copyright 2013 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkPDFResourceDict_DEFINED
#define SkPDFResourceDict_DEFINED
#include "SkPDFTypes.h"
#include "SkTDArray.h"
#include "SkTSet.h"
#include "SkTypes.h"
/** \class SkPDFResourceDict
A resource dictionary, which maintains the relevant sub-dicts and
allows generation of a list of referenced SkPDFObjects inserted with
insertResourceAsRef.
*/
class SkPDFResourceDict : public SkPDFDict {
public:
SK_DECLARE_INST_COUNT(SkPDFResourceDict)
enum SkPDFResourceType{
kExtGState_ResourceType,
kPattern_ResourceType,
kXObject_ResourceType,
kFont_ResourceType,
// These additional types are defined by the spec, but not
// currently used by Skia: ColorSpace, Shading, Properties
kResourceTypeCount
};
/** Create a PDF resource dictionary.
* The full set of ProcSet entries is automatically created for backwards
* compatibility, as recommended by the PDF spec.
*/
SkPDFResourceDict();
/** Add the value SkPDFObject as a reference to the resource dictionary
* with the give type and key.
* The relevant sub-dicts will be automatically generated, and the
* resource will be named by concatenating a type-specific prefix and
* the input key.
* This object will be part of the resource list when requested later.
* @param type The type of resource being entered, like
* kPattern_ResourceType or kExtGState_ResourceType.
* @param key The resource key, should be unique within its type.
* @param value The resource itself.
* @return The value argument is returned.
*/
SkPDFObject* insertResourceAsReference(SkPDFResourceType type, int key,
SkPDFObject* value);
/**
* Gets resources inserted into this dictionary as a reference.
*
* @param knownResourceObjects Set containing currently known resources.
* Resources in the dict and this set will not be added to the output.
* @param newResourceObjects Output set to which non-preexisting resources
* will be added.
* @param recursive Whether or not to add resources of resources.
*/
void getReferencedResources(
const SkTSet<SkPDFObject*>& knownResourceObjects,
SkTSet<SkPDFObject*>* newResourceObjects,
bool recursive) const;
/**
* Returns the name for the resource that will be generated by the resource
* dict.
*
* @param type The type of resource being entered, like
* kPattern_ResourceType or kExtGState_ResourceType.
* @param key The resource key, should be unique within its type.
*/
static SkString getResourceName(SkPDFResourceType type, int key);
private:
/** Add the value to the dictionary with the given key. Refs value.
* The relevant sub-dicts will be automatically generated, and the
* resource will be named by concatenating a type-specific prefix and
* the input key.
* The object will NOT be part of the resource list when requested later.
* @param type The type of resource being entered.
* @param key The resource key, should be unique within its type.
* @param value The resource itself.
* @return The value argument is returned.
*/
SkPDFObject* insertResource(SkPDFResourceType type, int key,
SkPDFObject* value);
SkTSet<SkPDFObject*> fResources;
SkTDArray<SkPDFDict*> fTypes;
typedef SkPDFDict INHERITED;
};
#endif
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