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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 
10 namespace skiagm {
11 
12 class FontScalerGM : public GM {
13 public:
FontScalerGM()14     FontScalerGM() {
15         this->setBGColor(0xFFFFFFFF);
16     }
17 
~FontScalerGM()18     virtual ~FontScalerGM() {
19     }
20 
21 protected:
onShortName()22     virtual SkString onShortName() {
23         return SkString("fontscaler");
24     }
25 
onISize()26     virtual SkISize onISize() {
27         return make_isize(1450, 750);
28     }
29 
rotate_about(SkCanvas * canvas,SkScalar degrees,SkScalar px,SkScalar py)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 
onDraw(SkCanvas * canvas)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 
83 private:
84     typedef GM INHERITED;
85 };
86 
87 //////////////////////////////////////////////////////////////////////////////
88 
MyFactory(void *)89 static GM* MyFactory(void*) { return new FontScalerGM; }
90 static GMRegistry reg(MyFactory);
91 
92 }
93 
94