xref: /third_party/skia/samplecode/SampleLCD.cpp (revision cb93a386) 
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 "include/core/SkCanvas.h"
8#include "include/core/SkFont.h"
9#include "include/core/SkPaint.h"
10#include "include/core/SkShader.h"
11#include "samplecode/Sample.h"
12
13class LCDView : public Sample {
14public:
15    LCDView() {}
16
17protected:
18    SkString name() override { return SkString("LCD Text"); }
19
20    void drawBG(SkCanvas* canvas) {
21        canvas->drawColor(SK_ColorWHITE);
22    }
23
24    void onDrawContent(SkCanvas* canvas) override {
25        this->drawBG(canvas);
26
27        SkPaint paint;
28
29        SkScalar textSize = SkIntToScalar(6);
30        SkScalar delta = SK_Scalar1;
31        const char* text = "HHHamburgefonts iii";
32        size_t len = strlen(text);
33        SkScalar x0 = SkIntToScalar(10);
34        SkScalar x1 = SkIntToScalar(310);
35        SkScalar y = SkIntToScalar(20);
36
37        SkFont font;
38        for (int i = 0; i < 20; i++) {
39            font.setSize(textSize);
40            textSize += delta;
41
42            font.setEdging(SkFont::Edging::kAntiAlias);
43            canvas->drawSimpleText(text, len, SkTextEncoding::kUTF8, x0, y, font, paint);
44            font.setEdging(SkFont::Edging::kSubpixelAntiAlias);
45            canvas->drawSimpleText(text, len, SkTextEncoding::kUTF8, x1, y, font, paint);
46
47            y += font.getSpacing();
48        }
49    }
50
51private:
52    using INHERITED = Sample;
53};
54
55//////////////////////////////////////////////////////////////////////////////
56
57DEF_SAMPLE( return new LCDView(); )
58