da912d61ed
- Shaders, or as they are referred to in PDF, patterns, are drawn in the coordinate system of the initial page, so when we canonicalize them, we have to consider the current transform and where they are constructed. - Image shaders are tiled by default, this makes repeat and mirror modes easy, but means we have to draw a pattern as large as the current clip to support clamp mode. - Gradient shaders are implemented with type 4 functions, which are basically small snippets of post script code. I've tried to make the code generation modular and heavily commented to make it easy to understand or expand. Review URL: http://codereview.appspot.com/4239061 git-svn-id: http://skia.googlecode.com/svn/trunk@905 2bbb7eff-a529-9590-31e7-b0007b416f81
56 lines
1.6 KiB
C++
56 lines
1.6 KiB
C++
/*
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* Copyright (C) 2010 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 SkPDFStream_DEFINED
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#define SkPDFStream_DEFINED
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#include "SkPDFTypes.h"
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#include "SkRefCnt.h"
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#include "SkStream.h"
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#include "SkTemplates.h"
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class SkPDFCatalog;
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/** \class SkPDFStream
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A stream object in a PDF. Note, all streams must be indirect objects (via
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SkObjRef).
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*/
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class SkPDFStream : public SkPDFDict {
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public:
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/** Create a PDF stream. A Length entry is automatically added to the
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* stream dictionary.
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* @param stream The data part of the stream.
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*/
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explicit SkPDFStream(SkStream* stream);
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virtual ~SkPDFStream();
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// The SkPDFObject interface.
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virtual void emitObject(SkWStream* stream, SkPDFCatalog* catalog,
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bool indirect);
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virtual size_t getOutputSize(SkPDFCatalog* catalog, bool indirect);
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private:
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size_t fLength;
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// Only one of the two streams will be valid.
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SkRefPtr<SkStream> fPlainData;
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SkDynamicMemoryWStream fCompressedData;
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typedef SkPDFDict INHERITED;
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};
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#endif
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