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
15class SkDocument_XPS : public SkDocument {
16public:
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
33protected:
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
59private:
60    SkXPSDevice fDevice;
61    SkAutoTUnref<SkCanvas> fCanvas;
62    SkVector fUnitsPerMeter;
63    SkVector fPixelsPerMeter;
64};
65
66///////////////////////////////////////////////////////////////////////////////
67
68SkDocument* SkDocument::CreateXPS(SkWStream* stream, SkScalar dpi) {
69    return stream ? new SkDocument_XPS(stream, nullptr, dpi) : nullptr;
70}
71
72static void delete_wstream(SkWStream* stream, bool aborted) { delete stream; }
73
74SkDocument* 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