| |
| /* |
| * Copyright 2010 The Android Open Source Project |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| |
| #ifndef SkPDFImage_DEFINED |
| #define SkPDFImage_DEFINED |
| |
| #include "SkPicture.h" |
| #include "SkPDFDevice.h" |
| #include "SkPDFStream.h" |
| #include "SkPDFTypes.h" |
| #include "SkRefCnt.h" |
| |
| class SkBitmap; |
| class SkData; |
| class SkPDFCatalog; |
| struct SkIRect; |
| |
| /** |
| * Return the mose efficient availible encoding of the given bitmap. |
| */ |
| SkPDFObject* SkPDFCreateImageObject(const SkBitmap&, const SkIRect& subset); |
| |
| /** \class SkPDFImage |
| |
| An image XObject. |
| */ |
| |
| // We could play the same trick here as is done in SkPDFGraphicState, storing |
| // a copy of the Bitmap object (not the pixels), the pixel generation number, |
| // and settings used from the paint to canonicalize image objects. |
| class SkPDFImage : public SkPDFStream { |
| public: |
| /** Create a new Image XObject to represent the passed bitmap. |
| * @param bitmap The image to encode. |
| * @param srcRect The rectangle to cut out of bitmap. |
| * @param paint Used to calculate alpha, masks, etc. |
| * @return The image XObject or NUll if there is nothing to draw for |
| * the given parameters. |
| */ |
| static SkPDFImage* CreateImage(const SkBitmap& bitmap, |
| const SkIRect& srcRect); |
| |
| virtual ~SkPDFImage(); |
| |
| bool isEmpty() { |
| return fSrcRect.isEmpty(); |
| } |
| |
| private: |
| SkBitmap fBitmap; |
| bool fIsAlpha; |
| SkIRect fSrcRect; |
| bool fStreamValid; |
| |
| /** Create a PDF image XObject. Entries for the image properties are |
| * automatically added to the stream dictionary. |
| * @param stream The image stream. May be NULL. Otherwise, this |
| * (instead of the input bitmap) will be used as the |
| * PDF's content stream, possibly with lossless encoding. |
| * Will be duplicated, and left in indeterminate state. |
| * @param bitmap The image. If a stream is not given, its color data |
| * will be used as the image. If a stream is given, this |
| * is used for configuration only. |
| * @param isAlpha Whether or not this is the alpha of an image. |
| * @param srcRect The clipping applied to bitmap before generating |
| * imageData. |
| */ |
| SkPDFImage(SkStream* stream, const SkBitmap& bitmap, bool isAlpha, |
| const SkIRect& srcRect); |
| |
| /** Copy constructor, used to generate substitutes. |
| * @param image The SkPDFImage to copy. |
| */ |
| SkPDFImage(SkPDFImage& pdfImage); |
| |
| // Populate the stream dictionary. This method returns false if |
| // fSubstitute should be used. |
| virtual bool populate(SkPDFCatalog* catalog); |
| |
| typedef SkPDFStream INHERITED; |
| }; |
| |
| #endif |