1/*
2 * Copyright 2013 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
8#include "gm.h"
9
10#include "Resources.h"
11#include "SkCanvas.h"
12#include "SkStream.h"
13#include "SkTypeface.h"
14
15namespace skiagm {
16
17class ColorEmojiGM : public GM {
18public:
19    ColorEmojiGM() {
20        fTypeface = NULL;
21    }
22
23    ~ColorEmojiGM() {
24        SkSafeUnref(fTypeface);
25    }
26protected:
27    virtual void onOnceBeforeDraw() SK_OVERRIDE {
28        SkString filename = GetResourcePath("/Funkster.ttf");
29        SkAutoTUnref<SkFILEStream> stream(new SkFILEStream(filename.c_str()));
30        if (!stream->isValid()) {
31            SkDebugf("Could not find Funkster.ttf, please set --resourcePath correctly.\n");
32            return;
33        }
34
35        fTypeface = SkTypeface::CreateFromStream(stream);
36    }
37
38    virtual SkString onShortName() {
39        return SkString("coloremoji");
40    }
41
42    virtual SkISize onISize() {
43        return SkISize::Make(640, 480);
44    }
45
46    virtual void onDraw(SkCanvas* canvas) {
47
48        canvas->drawColor(SK_ColorGRAY);
49
50        SkPaint paint;
51        paint.setTypeface(fTypeface);
52
53        const char* text = "hamburgerfons";
54
55        // draw text at different point sizes
56        const int textSize[] = { 10, 30, 50 };
57        const int textYOffset[] = { 10, 40, 100};
58        SkASSERT(sizeof(textSize) == sizeof(textYOffset));
59        for (size_t y = 0; y < sizeof(textSize) / sizeof(int); ++y) {
60            paint.setTextSize(SkIntToScalar(textSize[y]));
61            canvas->drawText(text, strlen(text), 10, SkIntToScalar(textYOffset[y]), paint);
62        }
63
64        // setup work needed to draw text with different clips
65        canvas->translate(10, 160);
66        paint.setTextSize(40);
67
68        // compute the bounds of the text
69        SkRect bounds;
70        paint.measureText(text, strlen(text), &bounds);
71
72        const SkScalar boundsHalfWidth = bounds.width() * SK_ScalarHalf;
73        const SkScalar boundsHalfHeight = bounds.height() * SK_ScalarHalf;
74        const SkScalar boundsQuarterWidth = boundsHalfWidth * SK_ScalarHalf;
75        const SkScalar boundsQuarterHeight = boundsHalfHeight * SK_ScalarHalf;
76
77        SkRect upperLeftClip = SkRect::MakeXYWH(bounds.left(), bounds.top(),
78                                                boundsHalfWidth, boundsHalfHeight);
79        SkRect lowerRightClip = SkRect::MakeXYWH(bounds.centerX(), bounds.centerY(),
80                                                 boundsHalfWidth, boundsHalfHeight);
81        SkRect interiorClip = bounds;
82        interiorClip.inset(boundsQuarterWidth, boundsQuarterHeight);
83
84        const SkRect clipRects[] = { bounds, upperLeftClip, lowerRightClip, interiorClip };
85
86        SkPaint clipHairline;
87        clipHairline.setColor(SK_ColorWHITE);
88        clipHairline.setStyle(SkPaint::kStroke_Style);
89
90        for (size_t x = 0; x < sizeof(clipRects) / sizeof(SkRect); ++x) {
91            canvas->save();
92            canvas->drawRect(clipRects[x], clipHairline);
93            paint.setAlpha(0x20);
94            canvas->drawText(text, strlen(text), 0, 0, paint);
95            canvas->clipRect(clipRects[x]);
96            paint.setAlpha(0xFF);
97            canvas->drawText(text, strlen(text), 0, 0, paint);
98            canvas->restore();
99            canvas->translate(0, bounds.height() + SkIntToScalar(25));
100        }
101    }
102
103private:
104    SkTypeface* fTypeface;
105
106    typedef GM INHERITED;
107};
108
109//////////////////////////////////////////////////////////////////////////////
110
111static GM* MyFactory(void*) { return new ColorEmojiGM; }
112static GMRegistry reg(MyFactory);
113
114}
115