1 /* 2 * Copyright 2013 The Android Open Source Project 3 * 4 * Use of this source code is governed by a BSD-style license that can be 5 * found in the LICENSE file. 6 */ 7 8 #ifndef SkPictureImageFilter_DEFINED 9 #define SkPictureImageFilter_DEFINED 10 11 #include "SkImageFilter.h" 12 #include "SkPicture.h" 13 14 class SK_API SkPictureImageFilter : public SkImageFilter { 15 public: 16 /** 17 * Refs the passed-in picture. 18 */ 19 static sk_sp<SkImageFilter> Make(sk_sp<SkPicture> picture); 20 21 /** 22 * Refs the passed-in picture. cropRect can be used to crop or expand the destination rect when 23 * the picture is drawn. (No scaling is implied by the dest rect; only the CTM is applied.) 24 */ 25 static sk_sp<SkImageFilter> Make(sk_sp<SkPicture> picture, const SkRect& cropRect); 26 27 /** 28 * Refs the passed-in picture. The picture is rasterized at a resolution that matches the 29 * local coordinate space. If the picture needs to be resampled for drawing it into the 30 * destination canvas, bilinear filtering will be used. cropRect can be used to crop or 31 * expand the destination rect when the picture is drawn. (No scaling is implied by the 32 * dest rect; only the CTM is applied.) 33 */ 34 static sk_sp<SkImageFilter> MakeForLocalSpace(sk_sp<SkPicture> picture, 35 const SkRect& cropRect, 36 SkFilterQuality filterQuality); 37 38 SK_TO_STRING_OVERRIDE() 39 SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkPictureImageFilter) 40 41 protected: 42 enum PictureResolution { 43 kDeviceSpace_PictureResolution, 44 kLocalSpace_PictureResolution 45 }; 46 47 /* Constructs an SkPictureImageFilter object from an SkReadBuffer. 48 * Note: If the SkPictureImageFilter object construction requires bitmap 49 * decoding, the decoder must be set on the SkReadBuffer parameter by calling 50 * SkReadBuffer::setBitmapDecoder() before calling this constructor. 51 * @param SkReadBuffer Serialized picture data. 52 */ 53 void flatten(SkWriteBuffer&) const override; 54 sk_sp<SkSpecialImage> onFilterImage(SkSpecialImage* source, const Context&, 55 SkIPoint* offset) const override; 56 sk_sp<SkImageFilter> onMakeColorSpace(SkColorSpaceXformer*) const override; 57 58 private: 59 explicit SkPictureImageFilter(sk_sp<SkPicture> picture); 60 SkPictureImageFilter(sk_sp<SkPicture> picture, const SkRect& cropRect, 61 PictureResolution, SkFilterQuality, sk_sp<SkColorSpace>); 62 63 void drawPictureAtDeviceResolution(SkCanvas* canvas, 64 const SkIRect& deviceBounds, 65 const Context&) const; 66 void drawPictureAtLocalResolution(SkSpecialImage* source, 67 SkCanvas*, 68 const SkIRect& deviceBounds, 69 const Context&) const; 70 71 sk_sp<SkPicture> fPicture; 72 SkRect fCropRect; 73 PictureResolution fPictureResolution; 74 SkFilterQuality fFilterQuality; 75 76 // Should never be set by a public constructor. This is only used when onMakeColorSpace() 77 // forces a deferred color space xform. 78 sk_sp<SkColorSpace> fColorSpace; 79 80 typedef SkImageFilter INHERITED; 81 }; 82 83 #endif 84
