OLD | NEW |
(Empty) | |
| 1 /* |
| 2 * Copyright 2014 Google Inc. |
| 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 SkPicturePlayback_DEFINED |
| 9 #define SkPicturePlayback_DEFINED |
| 10 |
| 11 #include "SkTypes.h" |
| 12 |
| 13 class SkBitmap; |
| 14 class SkCanvas; |
| 15 class SkDrawPictureCallback; |
| 16 class SkPaint; |
| 17 class SkPictureData; |
| 18 |
| 19 class SkPicturePlayback : SkNoncopyable { |
| 20 public: |
| 21 SkPicturePlayback(const SkPicture* picture) |
| 22 : fPictureData(picture->fData.get()) |
| 23 , fCurOffset(0) |
| 24 , fUseBBH(true) |
| 25 , fStart(0) |
| 26 , fStop(0) |
| 27 , fReplacements(NULL) { |
| 28 } |
| 29 virtual ~SkPicturePlayback() { } |
| 30 |
| 31 void draw(SkCanvas* canvas, SkDrawPictureCallback*); |
| 32 |
| 33 // Return the ID of the operation currently being executed when playing |
| 34 // back. 0 indicates no call is active. |
| 35 size_t curOpID() const { return fCurOffset; } |
| 36 void resetOpID() { fCurOffset = 0; } |
| 37 |
| 38 void setUseBBH(bool useBBH) { fUseBBH = useBBH; } |
| 39 |
| 40 // Limit the opcode playback to be between the offsets 'start' and 'stop'. |
| 41 // The opcode at 'start' should be a saveLayer while the opcode at |
| 42 // 'stop' should be a restore. Neither of those commands will be issued. |
| 43 // Set both start & stop to 0 to disable draw limiting |
| 44 // Draw limiting cannot be enabled at the same time as draw replacing |
| 45 void setDrawLimits(size_t start, size_t stop) { |
| 46 SkASSERT(NULL == fReplacements); |
| 47 fStart = start; |
| 48 fStop = stop; |
| 49 } |
| 50 |
| 51 // PlaybackReplacements collects op ranges that can be replaced with |
| 52 // a single drawBitmap call (using a precomputed bitmap). |
| 53 class PlaybackReplacements { |
| 54 public: |
| 55 // All the operations between fStart and fStop (inclusive) will be repla
ced with |
| 56 // a single drawBitmap call using fPos, fBM and fPaint. |
| 57 // fPaint will be NULL if the picture's paint wasn't copyable |
| 58 struct ReplacementInfo { |
| 59 size_t fStart; |
| 60 size_t fStop; |
| 61 SkIPoint fPos; |
| 62 SkBitmap* fBM; // fBM is allocated so ReplacementInfo can
remain POD |
| 63 const SkPaint* fPaint; // Note: this object doesn't own the paint |
| 64 |
| 65 SkIRect fSrcRect; |
| 66 }; |
| 67 |
| 68 ~PlaybackReplacements() { this->freeAll(); } |
| 69 |
| 70 // Add a new replacement range. The replacement ranges should be |
| 71 // sorted in increasing order and non-overlapping (esp. no nested |
| 72 // saveLayers). |
| 73 ReplacementInfo* push(); |
| 74 |
| 75 private: |
| 76 friend class SkPicturePlayback; // for access to lookupByStart |
| 77 |
| 78 // look up a replacement range by its start offset |
| 79 ReplacementInfo* lookupByStart(size_t start); |
| 80 |
| 81 void freeAll(); |
| 82 |
| 83 #ifdef SK_DEBUG |
| 84 void validate() const; |
| 85 #endif |
| 86 |
| 87 SkTDArray<ReplacementInfo> fReplacements; |
| 88 }; |
| 89 |
| 90 // Replace all the draw ops in the replacement ranges in 'replacements' with |
| 91 // the associated drawBitmap call |
| 92 // Draw replacing cannot be enabled at the same time as draw limiting |
| 93 void setReplacements(PlaybackReplacements* replacements) { |
| 94 SkASSERT(fStart == 0 && fStop == 0); |
| 95 fReplacements = replacements; |
| 96 } |
| 97 |
| 98 protected: |
| 99 const SkPictureData* fPictureData; |
| 100 |
| 101 // The offset of the current operation when within the draw method |
| 102 size_t fCurOffset; |
| 103 |
| 104 bool fUseBBH; |
| 105 size_t fStart; |
| 106 size_t fStop; |
| 107 PlaybackReplacements* fReplacements; |
| 108 |
| 109 #ifdef SK_DEVELOPER |
| 110 virtual bool preDraw(int opIndex, int type) { return false; } |
| 111 virtual void postDraw(int opIndex) { } |
| 112 #endif |
| 113 |
| 114 private: |
| 115 typedef SkNoncopyable INHERITED; |
| 116 }; |
| 117 |
| 118 #endif |
OLD | NEW |