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 #include "gm.h"
8 #include "Resources.h"
9 #include "SkFixed.h"
10 #include "SkFontDescriptor.h"
11 #include "SkFontMgr.h"
12 #include "SkTypeface.h"
13
14 namespace skiagm {
15
16 class FontScalerDistortableGM : public GM {
17 public:
FontScalerDistortableGM()18 FontScalerDistortableGM() {
19 this->setBGColor(0xFFFFFFFF);
20 }
21
~FontScalerDistortableGM()22 virtual ~FontScalerDistortableGM() { }
23
24 protected:
25
onShortName()26 SkString onShortName() override {
27 return SkString("fontscalerdistortable");
28 }
29
onISize()30 SkISize onISize() override {
31 return SkISize::Make(550, 700);
32 }
33
rotate_about(SkCanvas * canvas,SkScalar degrees,SkScalar px,SkScalar py)34 static void rotate_about(SkCanvas* canvas, SkScalar degrees, SkScalar px, SkScalar py) {
35 canvas->translate(px, py);
36 canvas->rotate(degrees);
37 canvas->translate(-px, -py);
38 }
39
onDraw(SkCanvas * canvas)40 void onDraw(SkCanvas* canvas) override {
41 SkPaint paint;
42 paint.setAntiAlias(true);
43 paint.setLCDRenderText(true);
44 SkAutoTUnref<SkFontMgr> fontMgr(SkFontMgr::RefDefault());
45
46 SkAutoTDelete<SkStreamAsset> distortable(GetResourceAsStream("/fonts/Distortable.ttf"));
47 if (!distortable) {
48 return;
49 }
50 const char* text = "abc";
51 const size_t textLen = strlen(text);
52
53 for (int j = 0; j < 2; ++j) {
54 for (int i = 0; i < 5; ++i) {
55 SkScalar x = SkIntToScalar(10);
56 SkScalar y = SkIntToScalar(20);
57
58 SkFourByteTag tag = SkSetFourByteTag('w','g','h','t');
59 SkScalar styleValue = SkDoubleToScalar(0.5 + (5*j + i) * ((2.0 - 0.5) / (2 * 5)));
60 SkFontMgr::FontParameters::Axis axes[] = { { tag, styleValue } };
61 SkAutoTUnref<SkTypeface> typeface(fontMgr->createFromStream(
62 distortable->duplicate(), SkFontMgr::FontParameters().setAxes(axes, 1)));
63 paint.setTypeface(typeface);
64
65 SkAutoCanvasRestore acr(canvas, true);
66 canvas->translate(SkIntToScalar(30 + i * 100), SkIntToScalar(20));
67 rotate_about(canvas, SkIntToScalar(i * 5), x, y * 10);
68
69 {
70 SkPaint p;
71 p.setAntiAlias(true);
72 SkRect r;
73 r.set(x - SkIntToScalar(3), SkIntToScalar(15),
74 x - SkIntToScalar(1), SkIntToScalar(280));
75 canvas->drawRect(r, p);
76 }
77
78 for (int ps = 6; ps <= 22; ps++) {
79 paint.setTextSize(SkIntToScalar(ps));
80 canvas->drawText(text, textLen, x, y, paint);
81 y += paint.getFontMetrics(nullptr);
82 }
83 }
84 canvas->translate(0, SkIntToScalar(360));
85 paint.setSubpixelText(true);
86 }
87 }
88
89 private:
90 typedef GM INHERITED;
91 };
92
93 //////////////////////////////////////////////////////////////////////////////
94
MyFactory(void *)95 static GM* MyFactory(void*) { return new FontScalerDistortableGM; }
96 static GMRegistry reg(MyFactory);
97
98 }
99