lcdtext.cpp revision ec3ed6a5ebf6f2c406d7bcf94b6bc34fcaeb976e 
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
9
10/* Tests text rendering with LCD and subpixel rendering turned on and off.
11 */
12
13#include "gm.h"
14#include "SkCanvas.h"
15
16namespace skiagm {
17
18class LcdTextGM : public GM {
19public:
20    LcdTextGM() {
21        const int pointSize = 36;
22        textHeight = SkIntToScalar(pointSize);
23    }
24
25protected:
26
27    SkString onShortName() {
28        return SkString("lcdtext");
29    }
30
31    SkISize onISize() { return make_isize(640, 480); }
32
33    void drawBG(SkCanvas* canvas) {
34        canvas->drawColor(SK_ColorWHITE);
35    }
36
37    virtual void onDraw(SkCanvas* canvas) {
38        this->drawBG(canvas);
39
40        y = textHeight;
41        drawText(canvas, SkString("TEXT: SubpixelTrue LCDRenderTrue"),
42                 true,  true);
43        drawText(canvas, SkString("TEXT: SubpixelTrue LCDRenderFalse"),
44                 true,  false);
45        drawText(canvas, SkString("TEXT: SubpixelFalse LCDRenderTrue"),
46                 false, true);
47        drawText(canvas, SkString("TEXT: SubpixelFalse LCDRenderFalse"),
48                 false, false);
49    }
50
51    void drawText(SkCanvas* canvas, const SkString& string,
52                  bool subpixelTextEnabled, bool lcdRenderTextEnabled) {
53        SkPaint paint;
54        paint.setColor(SK_ColorBLACK);
55        paint.setDither(true);
56        paint.setAntiAlias(true);
57        paint.setSubpixelText(subpixelTextEnabled);
58        paint.setLCDRenderText(lcdRenderTextEnabled);
59        paint.setTextSize(textHeight);
60
61        canvas->drawText(string.c_str(), string.size(), 0, y, paint);
62        y += textHeight;
63    }
64
65private:
66    typedef GM INHERITED;
67    SkScalar y, textHeight;
68};
69
70///////////////////////////////////////////////////////////////////////////////
71
72static GM* MyFactory(void*) { return new LcdTextGM; }
73static GMRegistry reg(MyFactory);
74
75}
76