halcanary | 45420a9 | 2016-06-02 12:41:14 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2016 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 "SkMultiPictureDocument.h" |
| 9 | #include "SkMultiPictureDocumentPriv.h" |
| 10 | #include "SkPicture.h" |
| 11 | #include "SkPictureRecorder.h" |
| 12 | #include "SkStream.h" |
halcanary | c966ef9 | 2016-08-23 09:15:04 -0700 | [diff] [blame] | 13 | #include "SkTArray.h" |
halcanary | 45420a9 | 2016-06-02 12:41:14 -0700 | [diff] [blame] | 14 | |
| 15 | /* |
| 16 | File format: |
| 17 | BEGINNING_OF_FILE: |
| 18 | kMagic |
halcanary | c966ef9 | 2016-08-23 09:15:04 -0700 | [diff] [blame] | 19 | uint32_t version_number (==2) |
halcanary | 45420a9 | 2016-06-02 12:41:14 -0700 | [diff] [blame] | 20 | uint32_t page_count |
| 21 | { |
halcanary | 45420a9 | 2016-06-02 12:41:14 -0700 | [diff] [blame] | 22 | float sizeX |
| 23 | float sizeY |
| 24 | } * page_count |
halcanary | 45420a9 | 2016-06-02 12:41:14 -0700 | [diff] [blame] | 25 | skp file |
halcanary | 45420a9 | 2016-06-02 12:41:14 -0700 | [diff] [blame] | 26 | */ |
| 27 | |
| 28 | namespace { |
| 29 | static SkCanvas* trim(SkCanvas* canvas, |
| 30 | SkScalar w, SkScalar h, |
| 31 | const SkRect& trimBox) { |
| 32 | // Only trim if necessary. |
| 33 | if (trimBox != SkRect::MakeWH(w, h)) { |
| 34 | // All SkDocument implementations implement trimBox using a |
| 35 | // clip+translate. |
| 36 | canvas->clipRect(trimBox); |
| 37 | canvas->translate(trimBox.x(), trimBox.y()); |
| 38 | } |
| 39 | return canvas; |
| 40 | } |
| 41 | |
halcanary | 45420a9 | 2016-06-02 12:41:14 -0700 | [diff] [blame] | 42 | struct MultiPictureDocument final : public SkDocument { |
| 43 | SkPictureRecorder fPictureRecorder; |
halcanary | 59d6402 | 2016-06-14 11:06:37 -0700 | [diff] [blame] | 44 | SkSize fCurrentPageSize; |
halcanary | c966ef9 | 2016-08-23 09:15:04 -0700 | [diff] [blame] | 45 | SkTArray<sk_sp<SkPicture>> fPages; |
| 46 | SkTArray<SkSize> fSizes; |
halcanary | 45420a9 | 2016-06-02 12:41:14 -0700 | [diff] [blame] | 47 | MultiPictureDocument(SkWStream* s, void (*d)(SkWStream*, bool)) |
| 48 | : SkDocument(s, d) {} |
| 49 | ~MultiPictureDocument() { this->close(); } |
| 50 | |
| 51 | SkCanvas* onBeginPage(SkScalar w, SkScalar h, const SkRect& c) override { |
halcanary | 59d6402 | 2016-06-14 11:06:37 -0700 | [diff] [blame] | 52 | fCurrentPageSize.set(w, h); |
halcanary | 45420a9 | 2016-06-02 12:41:14 -0700 | [diff] [blame] | 53 | return trim(fPictureRecorder.beginRecording(w, h), w, h, c); |
| 54 | } |
| 55 | void onEndPage() override { |
halcanary | c966ef9 | 2016-08-23 09:15:04 -0700 | [diff] [blame] | 56 | fSizes.push_back(fCurrentPageSize); |
| 57 | fPages.push_back(fPictureRecorder.finishRecordingAsPicture()); |
halcanary | 45420a9 | 2016-06-02 12:41:14 -0700 | [diff] [blame] | 58 | } |
reed | d14df7c | 2016-09-22 14:12:46 -0700 | [diff] [blame^] | 59 | void onClose(SkWStream* wStream) override { |
halcanary | 45420a9 | 2016-06-02 12:41:14 -0700 | [diff] [blame] | 60 | SkASSERT(wStream); |
| 61 | SkASSERT(wStream->bytesWritten() == 0); |
reed | d14df7c | 2016-09-22 14:12:46 -0700 | [diff] [blame^] | 62 | wStream->writeText(SkMultiPictureDocumentProtocol::kMagic); |
| 63 | wStream->write32(SkMultiPictureDocumentProtocol::kVersion); |
| 64 | wStream->write32(SkToU32(fPages.count())); |
halcanary | c966ef9 | 2016-08-23 09:15:04 -0700 | [diff] [blame] | 65 | for (SkSize s : fSizes) { |
reed | d14df7c | 2016-09-22 14:12:46 -0700 | [diff] [blame^] | 66 | wStream->write(&s, sizeof(s)); |
halcanary | 45420a9 | 2016-06-02 12:41:14 -0700 | [diff] [blame] | 67 | } |
halcanary | c966ef9 | 2016-08-23 09:15:04 -0700 | [diff] [blame] | 68 | SkSize bigsize = SkMultiPictureDocumentProtocol::Join(fSizes); |
| 69 | SkCanvas* c = fPictureRecorder.beginRecording(SkRect::MakeSize(bigsize)); |
| 70 | for (const sk_sp<SkPicture>& page : fPages) { |
| 71 | c->drawPicture(page); |
| 72 | c->drawAnnotation(SkRect::MakeEmpty(), |
| 73 | SkMultiPictureDocumentProtocol::kEndPage, |
| 74 | nullptr); |
halcanary | 45420a9 | 2016-06-02 12:41:14 -0700 | [diff] [blame] | 75 | } |
halcanary | c966ef9 | 2016-08-23 09:15:04 -0700 | [diff] [blame] | 76 | sk_sp<SkPicture> p = fPictureRecorder.finishRecordingAsPicture(); |
| 77 | p->serialize(wStream); |
| 78 | fPages.reset(); |
| 79 | fSizes.reset(); |
reed | d14df7c | 2016-09-22 14:12:46 -0700 | [diff] [blame^] | 80 | return; |
halcanary | 45420a9 | 2016-06-02 12:41:14 -0700 | [diff] [blame] | 81 | } |
halcanary | c966ef9 | 2016-08-23 09:15:04 -0700 | [diff] [blame] | 82 | void onAbort() override { |
| 83 | fPages.reset(); |
| 84 | fSizes.reset(); |
| 85 | } |
halcanary | 45420a9 | 2016-06-02 12:41:14 -0700 | [diff] [blame] | 86 | }; |
| 87 | } |
| 88 | |
| 89 | sk_sp<SkDocument> SkMakeMultiPictureDocument(SkWStream* wStream) { |
| 90 | return sk_make_sp<MultiPictureDocument>(wStream, nullptr); |
| 91 | } |