1
2/*
3 * Copyright 2011 Google Inc.
4 *
5 * Use of this source code is governed by a BSD-style license that can be
6 * found in the LICENSE file.
7 */
8#include "SampleCode.h"
9#include "SkView.h"
10#include "SkCanvas.h"
11#include "SkTypeface.h"
12#include "SkPath.h"
13#include "SkRegion.h"
14#include "SkShader.h"
15#include "SkUtils.h"
16#include "Sk1DPathEffect.h"
17#include "SkCornerPathEffect.h"
18#include "SkPathMeasure.h"
19#include "SkRandom.h"
20#include "SkColorPriv.h"
21#include "SkColorFilter.h"
22#include "SkDither.h"
23
24static const struct {
25    const char* fName;
26    SkTypeface::Style   fStyle;
27} gFaces[] = {
28    { NULL, SkTypeface::kNormal },
29    { NULL, SkTypeface::kBold },
30    { "serif", SkTypeface::kNormal },
31    { "serif", SkTypeface::kBold },
32    { "serif", SkTypeface::kItalic },
33    { "serif", SkTypeface::kBoldItalic },
34    { "monospace", SkTypeface::kNormal }
35};
36
37static const int gFaceCount = SK_ARRAY_COUNT(gFaces);
38
39class FontScalerTestView : public SampleView {
40    SkTypeface* fFaces[gFaceCount];
41
42public:
43    FontScalerTestView() {
44        for (int i = 0; i < gFaceCount; i++) {
45            fFaces[i] = SkTypeface::CreateFromName(gFaces[i].fName,
46                                                   gFaces[i].fStyle);
47        }
48//        this->setBGColor(0xFFDDDDDD);
49    }
50
51    virtual ~FontScalerTestView() {
52        for (int i = 0; i < gFaceCount; i++) {
53            SkSafeUnref(fFaces[i]);
54        }
55    }
56
57protected:
58    // overrides from SkEventSink
59    virtual bool onQuery(SkEvent* evt) {
60        if (SampleCode::TitleQ(*evt)) {
61            SampleCode::TitleR(evt, "FontScaler Test");
62            return true;
63        }
64        return this->INHERITED::onQuery(evt);
65    }
66
67    static void rotate_about(SkCanvas* canvas, SkScalar degrees, SkScalar px, SkScalar py) {
68        canvas->translate(px, py);
69        canvas->rotate(degrees);
70        canvas->translate(-px, -py);
71    }
72
73    virtual void onDrawContent(SkCanvas* canvas) {
74        SkPaint paint;
75
76        // test handling of obscene cubic values (currently broken)
77        if (false) {
78            SkPoint pts[4];
79            pts[0].set(1.61061274e+09f, 6291456);
80            pts[1].set(-7.18397061e+15f,
81                       -1.53091184e+13f);
82            pts[2].set(-1.30077315e+16f,
83                       -2.77196141e+13f);
84            pts[3].set(-1.30077315e+16f,
85                       -2.77196162e+13f);
86
87            SkPath path;
88            path.moveTo(pts[0]);
89            path.cubicTo(pts[1], pts[2], pts[3]);
90            canvas->drawPath(path, paint);
91        }
92
93//        paint.setSubpixelText(true);
94        paint.setAntiAlias(true);
95        paint.setLCDRenderText(true);
96        SkSafeUnref(paint.setTypeface(SkTypeface::CreateFromName("Times Roman", SkTypeface::kNormal)));
97
98//        const char* text = "abcdefghijklmnopqrstuvwxyz";
99        const char* text = "Hamburgefons ooo mmm";
100        const size_t textLen = strlen(text);
101
102        for (int j = 0; j < 2; ++j) {
103            for (int i = 0; i < 6; ++i) {
104                SkScalar x = SkIntToScalar(10);
105                SkScalar y = SkIntToScalar(20);
106
107                SkAutoCanvasRestore acr(canvas, true);
108                canvas->translate(SkIntToScalar(50 + i * 230),
109                                  SkIntToScalar(20));
110                rotate_about(canvas, SkIntToScalar(i * 5), x, y * 10);
111
112                {
113                    SkPaint p;
114                    p.setAntiAlias(true);
115                    SkRect r;
116                    r.set(x-3, 15, x-1, 280);
117                    canvas->drawRect(r, p);
118                }
119
120                int index = 0;
121                for (int ps = 6; ps <= 22; ps++) {
122                    paint.setTextSize(SkIntToScalar(ps));
123                    canvas->drawText(text, textLen, x, y, paint);
124                    y += paint.getFontMetrics(NULL);
125                    index += 1;
126                }
127            }
128            canvas->translate(0, 400);
129            paint.setSubpixelText(true);
130        }
131    }
132
133private:
134    typedef SkView INHERITED;
135};
136
137//////////////////////////////////////////////////////////////////////////////
138
139static SkView* MyFactory() { return new FontScalerTestView; }
140static SkViewRegister reg(MyFactory);
141