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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 #include "SkTypes.h" | |
13 | |
14 class SkBitmap; | |
15 class SkCanvas; | |
16 class SkPdfNativeDoc; | |
17 struct SkRect; | |
18 class SkStream; | |
19 | |
20 // What kind of content to render. | |
21 // FIXME: Currently unused. | |
22 enum SkPdfContent { | |
23 kNoForms_SkPdfContent, | |
24 kAll_SkPdfContent, | |
25 }; | |
26 | |
27 /** \class SkPdfRenderer | |
28 * | |
29 * The SkPdfRenderer class is used to render a PDF into canvas. | |
30 * | |
31 */ | |
32 class SkPdfRenderer : SkNoncopyable { | |
33 public: | |
34 // Create a new renderer from a stream. | |
35 // TODO(edisonn): replace it with a SkSmartStream which would know to to eff
iciently | |
36 // deal with a HTTP stream. | |
37 // FIXME: Untested. | |
38 // Does not affect ownership of SkStream. | |
39 static SkPdfRenderer* CreateFromStream(SkStream*); | |
40 // Create a new renderer from a file. | |
41 static SkPdfRenderer* CreateFromFile(const char* filename); | |
42 | |
43 ~SkPdfRenderer(); | |
44 | |
45 // Render a specific page into the canvas, in a specific rectangle. | |
46 bool renderPage(int page, SkCanvas* canvas, const SkRect& dst) const; | |
47 | |
48 // Returns the number of pages in the loaded pdf. | |
49 int pages() const; | |
50 | |
51 // Returns the MediaBox of a page. Can be used by client to crate a canvas. | |
52 SkRect MediaBox(int page) const; | |
53 | |
54 // TODO(edisonn): for testing only, probably it should be removed, unless so
me client wants to | |
55 // let users know how much memory the PDF needs. | |
56 size_t bytesUsed() const; | |
57 | |
58 private: | |
59 // Takes ownership of SkPdfNativeDoc. | |
60 SkPdfRenderer(SkPdfNativeDoc*); | |
61 SkPdfNativeDoc* fPdfDoc; | |
62 }; | |
63 | |
64 // For testing only, reports stats about rendering, like how many operations fai
led, or are NYI, ... | |
65 void reportPdfRenderStats(); | |
66 | |
67 // Renders a page of a pdf in a bitmap. | |
68 // Does not affect ownership of stream. | |
69 bool SkPDFNativeRenderToBitmap(SkStream* stream, | |
70 SkBitmap* output, | |
71 int page = 0, | |
72 SkPdfContent content = kAll_SkPdfContent, | |
73 double dpi = 72.0); | |
74 | |
75 // TODO(edisonn): add options to render forms, checkboxes, ... | |
76 // TODO(edisonn): Add API for Forms viewing and editing | |
77 // e.g. SkBitmap getPage(int page); | |
78 // int formsCount(); | |
79 // SkForm getForm(int formID); // SkForm(SkRect, .. other data) | |
80 // TODO (edisonn): Add intend when loading pdf, for example: for viewing, for pa
rsing content, ... | |
81 | |
82 #endif // SkPdfRenderer_DEFINED | |
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