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      1 /*
      2  * Copyright 2015 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 #if defined(SK_BUILD_FOR_WIN32)
     10 
     11 #include "SkDocument.h"
     12 #include "SkXPSDevice.h"
     13 #include "SkStream.h"
     14 
     15 class SkDocument_XPS : public SkDocument {
     16 public:
     17     SkDocument_XPS(SkWStream* stream,
     18                    void (*doneProc)(SkWStream*, bool),
     19                    SkScalar dpi)
     20         : SkDocument(stream, doneProc) {
     21         const SkScalar kPointsPerMeter = SkDoubleToScalar(360000.0 / 127.0);
     22         fUnitsPerMeter.set(kPointsPerMeter, kPointsPerMeter);
     23         SkScalar pixelsPerMeterScale = SkDoubleToScalar(dpi * 5000.0 / 127.0);
     24         fPixelsPerMeter.set(pixelsPerMeterScale, pixelsPerMeterScale);
     25         fDevice.beginPortfolio(stream);
     26     }
     27 
     28     virtual ~SkDocument_XPS() {
     29         // subclasses must call close() in their destructors
     30         this->close();
     31     }
     32 
     33 protected:
     34     SkCanvas* onBeginPage(SkScalar width,
     35                           SkScalar height,
     36                           const SkRect& trimBox) override {
     37         fDevice.beginSheet(fUnitsPerMeter, fPixelsPerMeter,
     38                            SkSize::Make(width, height));
     39         fCanvas.reset(new SkCanvas(&fDevice));
     40         fCanvas->clipRect(trimBox);
     41         fCanvas->translate(trimBox.x(), trimBox.y());
     42         return fCanvas.get();
     43     }
     44 
     45     void onEndPage() override {
     46         SkASSERT(fCanvas.get());
     47         fCanvas->flush();
     48         fCanvas.reset(nullptr);
     49         fDevice.endSheet();
     50     }
     51 
     52     bool onClose(SkWStream*) override {
     53         SkASSERT(!fCanvas.get());
     54         return fDevice.endPortfolio();
     55     }
     56 
     57     void onAbort() override {}
     58 
     59 private:
     60     SkXPSDevice fDevice;
     61     SkAutoTUnref<SkCanvas> fCanvas;
     62     SkVector fUnitsPerMeter;
     63     SkVector fPixelsPerMeter;
     64 };
     65 
     66 ///////////////////////////////////////////////////////////////////////////////
     67 
     68 SkDocument* SkDocument::CreateXPS(SkWStream* stream, SkScalar dpi) {
     69     return stream ? new SkDocument_XPS(stream, nullptr, dpi) : nullptr;
     70 }
     71 
     72 static void delete_wstream(SkWStream* stream, bool aborted) { delete stream; }
     73 
     74 SkDocument* SkDocument::CreateXPS(const char path[], SkScalar dpi) {
     75     SkAutoTDelete<SkFILEWStream> stream(new SkFILEWStream(path));
     76     if (!stream->isValid()) {
     77         return nullptr;
     78     }
     79     return new SkDocument_XPS(stream.detach(), delete_wstream, dpi);
     80 }
     81 
     82 #endif//defined(SK_BUILD_FOR_WIN32)
     83