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 #ifdef SAMPLE_PDF_FILE_VIEWER
9
10 #include "SampleCode.h"
11 #include "SkDumpCanvas.h"
12 #include "SkView.h"
13 #include "SkCanvas.h"
14 #include "SkGradientShader.h"
15 #include "SkGraphics.h"
16 #include "SkImageDecoder.h"
17 #include "SkOSFile.h"
18 #include "SkPath.h"
19 #include "SkPicture.h"
20 #include "SkRandom.h"
21 #include "SkRegion.h"
22 #include "SkShader.h"
23 #include "SkUtils.h"
24 #include "SkColorPriv.h"
25 #include "SkColorFilter.h"
26 #include "SkTime.h"
27 #include "SkTypeface.h"
28 #include "SkXfermode.h"
29
30 #include "SkPdfRenderer.h"
31
32 class PdfFileViewer : public SampleView {
33 private:
34 SkString fFilename;
35 SkPicture* fPicture; // TODO(edisonn): multiple pages, one page / picture, make it an array
36
LoadPdf(const char path[])37 static SkPicture* LoadPdf(const char path[]) {
38 SkAutoTDelete<SkPdfRenderer> renderer(SkPdfRenderer::CreateFromFile(path));
39 if (NULL == renderer.get()) {
40 return NULL;
41 }
42
43 SkPicture* pic = SkNEW(SkPicture);
44 SkCanvas* canvas = pic->beginRecording((int) renderer->MediaBox(0).width(),
45 (int) renderer->MediaBox(0).height());
46 renderer->renderPage(0, canvas, renderer->MediaBox(0));
47 pic->endRecording();
48 return pic;
49 }
50
51 public:
PdfFileViewer(const char name[]=NULL)52 PdfFileViewer(const char name[] = NULL) : fFilename(name) {
53 fPicture = NULL;
54 }
55
~PdfFileViewer()56 virtual ~PdfFileViewer() {
57 SkSafeUnref(fPicture);
58 }
59
60 protected:
61 // overrides from SkEventSink
onQuery(SkEvent * evt)62 virtual bool onQuery(SkEvent* evt) {
63 if (SampleCode::TitleQ(*evt)) {
64 SkString name("P:");
65 const char* basename = strrchr(fFilename.c_str(), SkPATH_SEPARATOR);
66 name.append(basename ? basename+1: fFilename.c_str());
67 SampleCode::TitleR(evt, name.c_str());
68 return true;
69 }
70 return this->INHERITED::onQuery(evt);
71 }
72
onEvent(const SkEvent & evt)73 virtual bool onEvent(const SkEvent& evt) {
74 // TODO(edisonn): add here event handlers to disable clipping, or to show helpful info
75 // like pdf object from click, ...
76 // TODO(edisonn): first, next, prev, last page navigation + slideshow
77 return this->INHERITED::onEvent(evt);
78 }
79
onDrawContent(SkCanvas * canvas)80 virtual void onDrawContent(SkCanvas* canvas) {
81 if (!fPicture) {
82 fPicture = LoadPdf(fFilename.c_str());
83 }
84 if (fPicture) {
85 canvas->drawPicture(*fPicture);
86 }
87 }
88
89 private:
90 typedef SampleView INHERITED;
91 };
92
93 SampleView* CreateSamplePdfFileViewer(const char filename[]);
CreateSamplePdfFileViewer(const char filename[])94 SampleView* CreateSamplePdfFileViewer(const char filename[]) {
95 return new PdfFileViewer(filename);
96 }
97
98 //////////////////////////////////////////////////////////////////////////////
99
100 #if 0
101 static SkView* MyFactory() { return new PdfFileViewer; }
102 static SkViewRegister reg(MyFactory);
103 #endif
104
105 #endif // SAMPLE_PDF_FILE_VIEWER
106