1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
|
/*
* Copyright 2013 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkTypes.h"
#ifdef SAMPLE_PDF_FILE_VIEWER
#include "SampleCode.h"
#include "SkView.h"
#include "SkCanvas.h"
#include "SkGradientShader.h"
#include "SkGraphics.h"
#include "SkOSFile.h"
#include "SkPath.h"
#include "SkPicture.h"
#include "SkRandom.h"
#include "SkRegion.h"
#include "SkShader.h"
#include "SkUtils.h"
#include "SkColorPriv.h"
#include "SkColorFilter.h"
#include "SkTime.h"
#include "SkTypeface.h"
#include "SkPdfRenderer.h"
class PdfFileViewer : public SampleView {
private:
SkString fFilename;
SkPicture* fPicture; // TODO(edisonn): multiple pages, one page / picture, make it an array
static SkPicture* LoadPdf(const char path[]) {
std::unique_ptr<SkPdfRenderer> renderer(SkPdfRenderer::CreateFromFile(path));
if (nullptr == renderer.get()) {
return nullptr;
}
SkPicture* pic = new SkPicture;
SkCanvas* canvas = pic->beginRecording((int) renderer->MediaBox(0).width(),
(int) renderer->MediaBox(0).height());
renderer->renderPage(0, canvas, renderer->MediaBox(0));
pic->endRecording();
return pic;
}
public:
PdfFileViewer(const char name[] = nullptr) : fFilename(name) {
fPicture = nullptr;
}
virtual ~PdfFileViewer() {
SkSafeUnref(fPicture);
}
protected:
// overrides from SkEventSink
virtual bool onQuery(SkEvent* evt) {
if (SampleCode::TitleQ(*evt)) {
SkString name("P:");
const char* basename = strrchr(fFilename.c_str(), SkPATH_SEPARATOR);
name.append(basename ? basename+1: fFilename.c_str());
SampleCode::TitleR(evt, name.c_str());
return true;
}
return this->INHERITED::onQuery(evt);
}
virtual bool onEvent(const SkEvent& evt) {
// TODO(edisonn): add here event handlers to disable clipping, or to show helpful info
// like pdf object from click, ...
// TODO(edisonn): first, next, prev, last page navigation + slideshow
return this->INHERITED::onEvent(evt);
}
virtual void onDrawContent(SkCanvas* canvas) {
if (!fPicture) {
fPicture = LoadPdf(fFilename.c_str());
}
if (fPicture) {
canvas->drawPicture(*fPicture);
}
}
private:
typedef SampleView INHERITED;
};
SampleView* CreateSamplePdfFileViewer(const char filename[]);
SampleView* CreateSamplePdfFileViewer(const char filename[]) {
return new PdfFileViewer(filename);
}
//////////////////////////////////////////////////////////////////////////////
#if 0
static SkView* MyFactory() { return new PdfFileViewer; }
static SkViewRegister reg(MyFactory);
#endif
#endif // SAMPLE_PDF_FILE_VIEWER
|
