421d6443fb
There are a lot of small pieces to make this change work: - SkPDFDocument (and SkPDFCatalog) take flags to disable compression (and font embedding - not implemented yet, can disable font subsetting for now). - SkPDFStream now defers compression until the size/emit step. - Classes that *had* a stream (because they didn't know the stream size at construction time) now *are* streams to make the substitution work correctly. - The SkPDFShader implementation got pulled apart into two classes, one that is a SkPDFDict, and one that is a SkPDFStream (making the common ancestor SkPDFObject). - Added helper methods in SkPDFObject for children that have simple resource lists. - Added an iterator to SkPDFDict so that a substitute SkPDFStream can get a copy of the stream dictionary. - Change SkPDFDocument to have a pointer to an SkPDFCatalog to remove a new circular header reference. Review URL: http://codereview.appspot.com/4700045 git-svn-id: http://skia.googlecode.com/svn/trunk@1911 2bbb7eff-a529-9590-31e7-b0007b416f81
73 lines
2.4 KiB
C++
73 lines
2.4 KiB
C++
/*
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* Copyright (C) 2011 Google Inc.
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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 SkPDFShader_DEFINED
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#define SkPDFShader_DEFINED
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#include "SkPDFStream.h"
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#include "SkPDFTypes.h"
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#include "SkMatrix.h"
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#include "SkRefCnt.h"
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#include "SkShader.h"
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class SkObjRef;
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class SkPDFCatalog;
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/** \class SkPDFShader
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In PDF parlance, this is a pattern, used in place of a color when the
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pattern color space is selected.
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*/
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class SkPDFShader {
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public:
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/** Get the PDF shader for the passed SkShader. If the SkShader is
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* invalid in some way, returns NULL. 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 shader The SkShader to emulate.
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* @param matrix The current transform. (PDF shaders are absolutely
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* positioned, relative to where the page is drawn.)
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* @param surfceBBox The bounding box of the drawing surface (with matrix
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* already applied).
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*/
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static SkPDFObject* GetPDFShader(const SkShader& shader,
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const SkMatrix& matrix,
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const SkIRect& surfaceBBox);
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protected:
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class State;
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class ShaderCanonicalEntry {
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public:
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ShaderCanonicalEntry(SkPDFObject* pdfShader, const State* state);
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bool operator==(const ShaderCanonicalEntry& b) const;
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SkPDFObject* fPDFShader;
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const State* fState;
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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<ShaderCanonicalEntry>& CanonicalShaders();
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static SkMutex& CanonicalShadersMutex();
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static void RemoveShader(SkPDFObject* shader);
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SkPDFShader();
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};
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#endif
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