fontscaler.cpp revision e16efc1882ab34a0bb3ae361a2d37f840044cf87 
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    virtual SkString onShortName() {
23        return SkString("fontscaler");
24    }
25
26    virtual SkISize onISize() {
27        return make_isize(1450, 750);
28    }
29
30    static void rotate_about(SkCanvas* canvas,
31                             SkScalar degrees,
32                             SkScalar px, SkScalar py) {
33        canvas->translate(px, py);
34        canvas->rotate(degrees);
35        canvas->translate(-px, -py);
36    }
37
38    virtual void onDraw(SkCanvas* canvas) {
39        SkPaint paint;
40
41        paint.setAntiAlias(true);
42        paint.setLCDRenderText(true);
43        //With freetype the default (normal hinting) can be really ugly.
44        //Most distros now set slight (vertical hinting only) in any event.
45        paint.setHinting(SkPaint::kSlight_Hinting);
46        SkSafeUnref(paint.setTypeface(SkTypeface::CreateFromName("Times Roman", SkTypeface::kNormal)));
47
48        const char* text = "Hamburgefons ooo mmm";
49        const size_t textLen = strlen(text);
50
51        for (int j = 0; j < 2; ++j) {
52            for (int i = 0; i < 6; ++i) {
53                SkScalar x = SkIntToScalar(10);
54                SkScalar y = SkIntToScalar(20);
55
56                SkAutoCanvasRestore acr(canvas, true);
57                canvas->translate(SkIntToScalar(50 + i * 230),
58                                  SkIntToScalar(20));
59                rotate_about(canvas, SkIntToScalar(i * 5), x, y * 10);
60
61                {
62                    SkPaint p;
63                    p.setAntiAlias(true);
64                    SkRect r;
65                    r.set(x - SkIntToScalar(3), SkIntToScalar(15),
66                          x - SkIntToScalar(1), SkIntToScalar(280));
67                    canvas->drawRect(r, p);
68                }
69
70                int index = 0;
71                for (int ps = 6; ps <= 22; ps++) {
72                    paint.setTextSize(SkIntToScalar(ps));
73                    canvas->drawText(text, textLen, x, y, paint);
74                    y += paint.getFontMetrics(NULL);
75                    index += 1;
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