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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 "gm/gm.h"
9 #include "include/core/SkAnnotation.h"
10 #include "include/core/SkCanvas.h"
11 #include "include/core/SkColor.h"
12 #include "include/core/SkData.h"
13 #include "include/core/SkFont.h"
14 #include "include/core/SkPaint.h"
15 #include "include/core/SkPoint.h"
16 #include "include/core/SkRect.h"
17 #include "include/core/SkRefCnt.h"
18 #include "include/core/SkScalar.h"
19 #include "include/core/SkSize.h"
20 #include "include/core/SkString.h"
21 #include "include/core/SkTypeface.h"
22 #include "tools/ToolUtils.h"
23 
24 namespace {
25 
26 /** Draws two rectangles. In output formats that support internal links (PDF),
27  *  clicking the one labeled "Link to A" should take you to the one labeled
28  *  "Target A". Note that you'll need to zoom your PDF viewer in a fair bit in
29  *  order for the scrolling to not be blocked by the edge of the document.
30  */
31 class InternalLinksGM : public skiagm::GM {
onOnceBeforeDraw()32     void onOnceBeforeDraw() override { this->setBGColor(0xFFDDDDDD); }
33 
onShortName()34     SkString onShortName() override { return SkString("internal_links"); }
35 
onISize()36     SkISize onISize() override { return {700, 500}; }
37 
onDraw(SkCanvas * canvas)38     void onDraw(SkCanvas* canvas) override {
39         sk_sp<SkData> name(SkData::MakeWithCString("target-a"));
40 
41         canvas->save();
42         canvas->translate(SkIntToScalar(100), SkIntToScalar(100));
43         drawLabeledRect(canvas, "Link to A", 0, 0);
44         SkRect rect = SkRect::MakeXYWH(0, 0, SkIntToScalar(50), SkIntToScalar(20));
45         SkAnnotateLinkToDestination(canvas, rect, name.get());
46         canvas->restore();
47 
48         canvas->save();
49         canvas->translate(SkIntToScalar(200), SkIntToScalar(200));
50         SkPoint point = SkPoint::Make(SkIntToScalar(100), SkIntToScalar(50));
51         drawLabeledRect(canvas, "Target A", point.x(), point.y());
52         SkAnnotateNamedDestination(canvas, point, name.get());
53         canvas->restore();
54     }
55 
56     /** Draw an arbitrary rectangle at a given location and label it with some
57      *  text. */
drawLabeledRect(SkCanvas * canvas,const char * text,SkScalar x,SkScalar y)58     void drawLabeledRect(SkCanvas* canvas, const char* text, SkScalar x, SkScalar y) {
59         SkPaint paint;
60         paint.setColor(SK_ColorBLUE);
61         SkRect rect = SkRect::MakeXYWH(x, y,
62                                        SkIntToScalar(50), SkIntToScalar(20));
63         canvas->drawRect(rect, paint);
64 
65         SkFont font(ToolUtils::create_portable_typeface(), 25);
66         paint.setColor(SK_ColorBLACK);
67         canvas->drawString(text, x, y, font, paint);
68     }
69 };
70 }  // namespace
71 
72 DEF_GM( return new InternalLinksGM; )
73