fontscaler.cpp revision 36352bf5e38f45a70ee4f4fc132a38048d38206d 
1/*
2 * Copyright 2011 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 "SkTypeface.h"
9
10namespace skiagm {
11
12class FontScalerGM : public GM {
13public:
14    FontScalerGM() {
15        this->setBGColor(0xFFFFFFFF);
16    }
17
18    virtual ~FontScalerGM() {
19    }
20
21protected:
22
23    SkString onShortName() override {
24        return SkString("fontscaler");
25    }
26
27    SkISize onISize() override {
28        return SkISize::Make(1450, 750);
29    }
30
31    static void rotate_about(SkCanvas* canvas,
32                             SkScalar degrees,
33                             SkScalar px, SkScalar py) {
34        canvas->translate(px, py);
35        canvas->rotate(degrees);
36        canvas->translate(-px, -py);
37    }
38
39    void onDraw(SkCanvas* canvas) override {
40        SkPaint paint;
41
42        paint.setAntiAlias(true);
43        paint.setLCDRenderText(true);
44        //With freetype the default (normal hinting) can be really ugly.
45        //Most distros now set slight (vertical hinting only) in any event.
46        paint.setHinting(SkPaint::kSlight_Hinting);
47        sk_tool_utils::set_portable_typeface(&paint, "Times Roman", SkTypeface::kNormal);
48
49        const char* text = "Hamburgefons ooo mmm";
50        const size_t textLen = strlen(text);
51
52        for (int j = 0; j < 2; ++j) {
53            // This used to do 6 iterations but it causes the N4 to crash in the MSAA4 config.
54            for (int i = 0; i < 5; ++i) {
55                SkScalar x = SkIntToScalar(10);
56                SkScalar y = SkIntToScalar(20);
57
58                SkAutoCanvasRestore acr(canvas, true);
59                canvas->translate(SkIntToScalar(50 + i * 230),
60                                  SkIntToScalar(20));
61                rotate_about(canvas, SkIntToScalar(i * 5), x, y * 10);
62
63                {
64                    SkPaint p;
65                    p.setAntiAlias(true);
66                    SkRect r;
67                    r.set(x - SkIntToScalar(3), SkIntToScalar(15),
68                          x - SkIntToScalar(1), SkIntToScalar(280));
69                    canvas->drawRect(r, p);
70                }
71
72                for (int ps = 6; ps <= 22; ps++) {
73                    paint.setTextSize(SkIntToScalar(ps));
74                    canvas->drawText(text, textLen, x, y, paint);
75                    y += paint.getFontMetrics(NULL);
76                }
77            }
78            canvas->translate(0, SkIntToScalar(360));
79            paint.setSubpixelText(true);
80        }
81    }
82
83private:
84    typedef GM INHERITED;
85};
86
87//////////////////////////////////////////////////////////////////////////////
88
89static GM* MyFactory(void*) { return new FontScalerGM; }
90static GMRegistry reg(MyFactory);
91
92}
93