1 2 /* 3 * Copyright 2010 The Android Open Source Project 4 * 5 * Use of this source code is governed by a BSD-style license that can be 6 * found in the LICENSE file. 7 */ 8 9 10 #ifndef SkPDFImage_DEFINED 11 #define SkPDFImage_DEFINED 12 13 #include "SkPDFDevice.h" 14 #include "SkPDFImageStream.h" 15 #include "SkPDFTypes.h" 16 #include "SkRefCnt.h" 17 18 class SkBitmap; 19 class SkPDFCatalog; 20 struct SkIRect; 21 22 /** \class SkPDFImage 23 24 An image XObject. 25 */ 26 27 // We could play the same trick here as is done in SkPDFGraphicState, storing 28 // a copy of the Bitmap object (not the pixels), the pixel generation number, 29 // and settings used from the paint to canonicalize image objects. 30 class SkPDFImage : public SkPDFImageStream { 31 public: 32 /** Create a new Image XObject to represent the passed bitmap. 33 * @param bitmap The image to encode. 34 * @param srcRect The rectangle to cut out of bitmap. 35 * @param paint Used to calculate alpha, masks, etc. 36 * @return The image XObject or NUll if there is nothing to draw for 37 * the given parameters. 38 */ 39 static SkPDFImage* CreateImage(const SkBitmap& bitmap, 40 const SkIRect& srcRect, 41 EncodeToDCTStream encoder); 42 43 virtual ~SkPDFImage(); 44 45 /** Add a Soft Mask (alpha or shape channel) to the image. Refs mask. 46 * @param mask A gray scale image representing the mask. 47 * @return The mask argument is returned. 48 */ 49 SkPDFImage* addSMask(SkPDFImage* mask); 50 51 // The SkPDFObject interface. 52 virtual void getResources(const SkTSet<SkPDFObject*>& knownResourceObjects, 53 SkTSet<SkPDFObject*>* newResourceObjects); 54 55 private: 56 SkTDArray<SkPDFObject*> fResources; 57 58 /** Create a PDF image XObject. Entries for the image properties are 59 * automatically added to the stream dictionary. 60 * @param imageData The final raw bits representing the image. 61 * @param bitmap The image parameters to use (Config, etc). 62 * @param srcRect The clipping applied to bitmap before generating 63 * imageData. 64 * @param alpha Is this the alpha channel of the bitmap. 65 * @param paint Used to calculate alpha, masks, etc. 66 */ 67 SkPDFImage(SkStream* imageData, const SkBitmap& bitmap, 68 const SkIRect& srcRect, bool alpha, EncodeToDCTStream encoder); 69 }; 70 71 #endif 72
