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1 /* | |
2 * Copyright 2013 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 | |
9 #ifndef SkPdfRenderer_DEFINED | |
10 #define SkPdfRenderer_DEFINED | |
11 | |
12 // TODO(edisonn): remove this dependency, and load only from a stream! | |
13 #include "SkString.h" | |
14 | |
15 class SkBitmap; | |
16 class SkCanvas; | |
17 class SkPdfNativeDoc; | |
18 struct SkRect; | |
19 class SkStream; | |
20 class SkString; | |
21 | |
22 // What kind of content to render. | |
23 enum SkPdfContent { | |
24 kNoForms_SkPdfContent, | |
25 kAll_SkPdfContent, | |
26 }; | |
27 | |
28 /** \class SkPdfRenderer | |
29 * | |
30 * The SkPdfRenderer class is used to render a PDF into canvas. | |
31 * | |
32 */ | |
33 class SkPdfRenderer { | |
34 public: | |
35 SkPdfRenderer() : fPdfDoc(NULL) {} | |
36 virtual ~SkPdfRenderer() {unload();} | |
37 | |
38 // Render a specific page into the canvas, in a specific rectangle. | |
39 bool renderPage(int page, SkCanvas* canvas, const SkRect& dst) const; | |
40 | |
41 // TODO(edisonn): deprecated, should be removed! | |
42 bool load(const SkString inputFileName); | |
43 | |
44 // TODO(edisonn): replace it with a SkSmartStream which would know to to eff
iciently | |
45 // deal with a HTTP stream. | |
46 bool load(SkStream* stream); | |
47 | |
48 // Unloads the pdf document. | |
49 void unload(); | |
50 | |
51 // Returns true if we succesfully loaded a document. | |
52 bool loaded() const {return fPdfDoc != NULL && pages() > 0;} | |
53 | |
54 // Returns the number of pages in the loaded pdf. | |
55 int pages() const; | |
56 | |
57 // Returns the MediaBox of a page. Can be used by client to crate a canvas. | |
58 SkRect MediaBox(int page) const; | |
59 | |
60 // TODO(edisonn): for testing only, probably it should be removed, unless so
me client wants to | |
61 // let users know how much memory the PDF needs. | |
62 size_t bytesUsed() const; | |
63 | |
64 private: | |
65 SkPdfNativeDoc* fPdfDoc; | |
66 }; | |
67 | |
68 // For testing only, reports stats about rendering, like how many operations fai
led, or are NYI, ... | |
69 void reportPdfRenderStats(); | |
70 | |
71 // Renders a page of a pdf in a bitmap. | |
72 bool SkPDFNativeRenderToBitmap(SkStream* stream, | |
73 SkBitmap* output, | |
74 int page = 0, | |
75 SkPdfContent content = kAll_SkPdfContent, | |
76 double dpi = 72.0); | |
77 | |
78 // TODO(edisonn): add options to render forms, checkboxes, ... | |
79 // TODO(edisonn): Add API for Forms viewing and editing | |
80 // e.g. SkBitmap getPage(int page); | |
81 // int formsCount(); | |
82 // SkForm getForm(int formID); // SkForm(SkRect, .. other data) | |
83 // TODO (edisonn): Add intend when loading pdf, for example: for viewing, for pa
rsing content, ... | |
84 | |
85 #endif // SkPdfRenderer_DEFINED | |
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