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 #include "SkTypes.h"
9
10 #ifdef SAMPLE_PDF_FILE_VIEWER
11
12 #include "SampleCode.h"
13 #include "SkDumpCanvas.h"
14 #include "SkView.h"
15 #include "SkCanvas.h"
16 #include "SkGradientShader.h"
17 #include "SkGraphics.h"
18 #include "SkOSFile.h"
19 #include "SkPath.h"
20 #include "SkPicture.h"
21 #include "SkRandom.h"
22 #include "SkRegion.h"
23 #include "SkShader.h"
24 #include "SkUtils.h"
25 #include "SkColorPriv.h"
26 #include "SkColorFilter.h"
27 #include "SkTime.h"
28 #include "SkTypeface.h"
29 #include "SkPdfRenderer.h"
30
31 class PdfFileViewer : public SampleView {
32 private:
33 SkString fFilename;
34 SkPicture* fPicture; // TODO(edisonn): multiple pages, one page / picture, make it an array
35
LoadPdf(const char path[])36 static SkPicture* LoadPdf(const char path[]) {
37 std::unique_ptr<SkPdfRenderer> renderer(SkPdfRenderer::CreateFromFile(path));
38 if (nullptr == renderer.get()) {
39 return nullptr;
40 }
41
42 SkPicture* pic = new SkPicture;
43 SkCanvas* canvas = pic->beginRecording((int) renderer->MediaBox(0).width(),
44 (int) renderer->MediaBox(0).height());
45 renderer->renderPage(0, canvas, renderer->MediaBox(0));
46 pic->endRecording();
47 return pic;
48 }
49
50 public:
PdfFileViewer(const char name[]=nullptr)51 PdfFileViewer(const char name[] = nullptr) : fFilename(name) {
52 fPicture = nullptr;
53 }
54
~PdfFileViewer()55 virtual ~PdfFileViewer() {
56 SkSafeUnref(fPicture);
57 }
58
59 protected:
60 // overrides from SkEventSink
onQuery(SkEvent * evt)61 virtual bool onQuery(SkEvent* evt) {
62 if (SampleCode::TitleQ(*evt)) {
63 SkString name("P:");
64 const char* basename = strrchr(fFilename.c_str(), SkPATH_SEPARATOR);
65 name.append(basename ? basename+1: fFilename.c_str());
66 SampleCode::TitleR(evt, name.c_str());
67 return true;
68 }
69 return this->INHERITED::onQuery(evt);
70 }
71
onEvent(const SkEvent & evt)72 virtual bool onEvent(const SkEvent& evt) {
73 // TODO(edisonn): add here event handlers to disable clipping, or to show helpful info
74 // like pdf object from click, ...
75 // TODO(edisonn): first, next, prev, last page navigation + slideshow
76 return this->INHERITED::onEvent(evt);
77 }
78
onDrawContent(SkCanvas * canvas)79 virtual void onDrawContent(SkCanvas* canvas) {
80 if (!fPicture) {
81 fPicture = LoadPdf(fFilename.c_str());
82 }
83 if (fPicture) {
84 canvas->drawPicture(*fPicture);
85 }
86 }
87
88 private:
89 typedef SampleView INHERITED;
90 };
91
92 SampleView* CreateSamplePdfFileViewer(const char filename[]);
CreateSamplePdfFileViewer(const char filename[])93 SampleView* CreateSamplePdfFileViewer(const char filename[]) {
94 return new PdfFileViewer(filename);
95 }
96
97 //////////////////////////////////////////////////////////////////////////////
98
99 #if 0
100 static SkView* MyFactory() { return new PdfFileViewer; }
101 static SkViewRegister reg(MyFactory);
102 #endif
103
104 #endif // SAMPLE_PDF_FILE_VIEWER
105