skia2/samplecode/SamplePdfFileViewer.cpp
Mike Klein c0bd9f9fe5 rewrite includes to not need so much -Ifoo
Current strategy: everything from the top

Things to look at first are the manual changes:

   - added tools/rewrite_includes.py
   - removed -Idirectives from BUILD.gn
   - various compile.sh simplifications
   - tweak tools/embed_resources.py
   - update gn/find_headers.py to write paths from the top
   - update gn/gn_to_bp.py SkUserConfig.h layout
     so that #include "include/config/SkUserConfig.h" always
     gets the header we want.

No-Presubmit: true
Change-Id: I73a4b181654e0e38d229bc456c0d0854bae3363e
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/209706
Commit-Queue: Mike Klein <mtklein@google.com>
Reviewed-by: Hal Canary <halcanary@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
Reviewed-by: Florin Malita <fmalita@chromium.org>
2019-04-24 16:27:11 +00:00

102 lines
3.0 KiB
C++

/*
* 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 "include/core/SkTypes.h"
#ifdef SAMPLE_PDF_FILE_VIEWER
#include "include/core/SkCanvas.h"
#include "include/core/SkColorFilter.h"
#include "include/core/SkColorPriv.h"
#include "include/core/SkGraphics.h"
#include "include/core/SkPath.h"
#include "include/core/SkPicture.h"
#include "include/core/SkRegion.h"
#include "include/core/SkShader.h"
#include "include/core/SkTime.h"
#include "include/core/SkTypeface.h"
#include "include/effects/SkGradientShader.h"
#include "include/utils/SkRandom.h"
#include "samplecode/Sample.h"
#include "src/core/SkOSFile.h"
#include "src/utils/SkUTF.h"
#include "SkPdfRenderer.h"
class PdfFileViewer : public Sample {
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:
virtual bool onQuery(Sample::Event* evt) {
if (Sample::TitleQ(*evt)) {
SkString name("P:");
const char* basename = strrchr(fFilename.c_str(), SkPATH_SEPARATOR);
name.append(basename ? basename+1: fFilename.c_str());
Sample::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 Sample INHERITED;
};
Sample* CreateSamplePdfFileViewer(const char filename[]);
Sample* CreateSamplePdfFileViewer(const char filename[]) {
return new PdfFileViewer(filename);
}
//////////////////////////////////////////////////////////////////////////////
#if 0
static Sample* MyFactory() { return new PdfFileViewer; }
static SampleRegister reg(MyFactory);
#endif
#endif // SAMPLE_PDF_FILE_VIEWER