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| 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 #include "PageCachingDocument.h" |
| 9 #include "SkCanvas.h" |
| 10 #include "SkDocument.h" |
| 11 #include "SkPictureRecorder.h" |
| 12 #include "SkRect.h" |
| 13 #include "SkTDArray.h" |
| 14 |
| 15 namespace { |
| 16 |
| 17 typedef void (*DoneProc)(SkWStream*, bool); |
| 18 typedef SkData* (*Encoder)(size_t*, const SkBitmap&); |
| 19 |
| 20 // This class allows us to compare the relative memory consumption of |
| 21 // the PDF and SkPicture backends. |
| 22 class PageCachingDocument : public SkDocument { |
| 23 public: |
| 24 PageCachingDocument(SkWStream*, DoneProc, Encoder, SkScalar rasterDpi); |
| 25 virtual ~PageCachingDocument(); |
| 26 virtual SkCanvas* onBeginPage(SkScalar width, |
| 27 SkScalar height, |
| 28 const SkRect& content) SK_OVERRIDE; |
| 29 virtual void onEndPage() SK_OVERRIDE; |
| 30 virtual bool onClose(SkWStream*) SK_OVERRIDE; |
| 31 virtual void onAbort() SK_OVERRIDE; |
| 32 |
| 33 private: |
| 34 struct Page { |
| 35 SkScalar fWidth; |
| 36 SkScalar fHeight; |
| 37 SkAutoTUnref<SkPicture> fPic; |
| 38 }; |
| 39 SkPictureRecorder fRecorder; |
| 40 SkTDArray<Page> fPages; |
| 41 Encoder fEncoder; |
| 42 SkScalar fRasterDpi; |
| 43 }; |
| 44 |
| 45 PageCachingDocument::PageCachingDocument(SkWStream* stream, |
| 46 DoneProc done, |
| 47 Encoder encoder, |
| 48 SkScalar rasterDpi) |
| 49 : SkDocument(stream, done), fEncoder(encoder), fRasterDpi(rasterDpi) { |
| 50 } |
| 51 |
| 52 PageCachingDocument::~PageCachingDocument() { |
| 53 for (Page* p = fPages.begin(); p != fPages.end(); ++p) { |
| 54 p->~Page(); |
| 55 } |
| 56 } |
| 57 |
| 58 SkCanvas* PageCachingDocument::onBeginPage(SkScalar width, |
| 59 SkScalar height, |
| 60 const SkRect& content) { |
| 61 Page* page = fPages.push(); |
| 62 sk_bzero(page, sizeof(*page)); |
| 63 page->fWidth = width; |
| 64 page->fHeight = height; |
| 65 SkASSERT(!page->fPic.get()); |
| 66 SkCanvas* canvas = fRecorder.beginRecording(content); |
| 67 return canvas; |
| 68 } |
| 69 |
| 70 void PageCachingDocument::onEndPage() { |
| 71 SkASSERT(fPages.count() > 0); |
| 72 SkASSERT(!fPages[fPages.count() - 1].fPic); |
| 73 fPages[fPages.count() - 1].fPic.reset(fRecorder.endRecording()); |
| 74 } |
| 75 |
| 76 bool PageCachingDocument::onClose(SkWStream* stream) { |
| 77 SkAutoTUnref<SkDocument> doc( |
| 78 SkDocument::CreatePDF(stream, NULL, fEncoder, fRasterDpi)); |
| 79 for (Page* page = fPages.begin(); page != fPages.end(); ++page) { |
| 80 SkRect cullRect = page->fPic->cullRect(); |
| 81 SkCanvas* canvas = |
| 82 doc->beginPage(page->fWidth, page->fHeight, &cullRect); |
| 83 canvas->drawPicture(page->fPic); |
| 84 doc->endPage(); |
| 85 } |
| 86 return doc->close(); |
| 87 } |
| 88 |
| 89 void PageCachingDocument::onAbort() { |
| 90 } |
| 91 } // namespace |
| 92 |
| 93 SkDocument* CreatePageCachingDocument(SkWStream* stream, |
| 94 DoneProc done, |
| 95 Encoder encoder, |
| 96 SkScalar rasterDpi) { |
| 97 return SkNEW_ARGS(PageCachingDocument, (stream, done, encoder, rasterDpi)); |
| 98 } |
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