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 #include "SkCanvas.h"
10 #include "SkStream.h"
11 #include "SkTypeface.h"
12
13 namespace skiagm {
14
15 class ColorEmojiGM : public GM {
16 public:
ColorEmojiGM()17 ColorEmojiGM() {
18 fTypeface = NULL;
19 }
20
~ColorEmojiGM()21 ~ColorEmojiGM() {
22 SkSafeUnref(fTypeface);
23 }
24 protected:
onOnceBeforeDraw()25 virtual void onOnceBeforeDraw() SK_OVERRIDE {
26
27 SkString filename(INHERITED::gResourcePath);
28 filename.append("/Funkster.ttf");
29
30 SkAutoTUnref<SkFILEStream> stream(new SkFILEStream(filename.c_str()));
31 if (!stream->isValid()) {
32 SkDebugf("Could not find Funkster.ttf, please set --resourcePath correctly.\n");
33 return;
34 }
35
36 fTypeface = SkTypeface::CreateFromStream(stream);
37 }
38
onShortName()39 virtual SkString onShortName() {
40 return SkString("coloremoji");
41 }
42
onISize()43 virtual SkISize onISize() {
44 return make_isize(640, 480);
45 }
46
onDraw(SkCanvas * canvas)47 virtual void onDraw(SkCanvas* canvas) {
48
49 canvas->drawColor(SK_ColorGRAY);
50
51 SkPaint paint;
52 paint.setTypeface(fTypeface);
53
54 const char* text = "hamburgerfons";
55
56 // draw text at different point sizes
57 const int textSize[] = { 10, 30, 50 };
58 const int textYOffset[] = { 10, 40, 100};
59 SkASSERT(sizeof(textSize) == sizeof(textYOffset));
60 for (size_t y = 0; y < sizeof(textSize) / sizeof(int); ++y) {
61 paint.setTextSize(SkIntToScalar(textSize[y]));
62 canvas->drawText(text, strlen(text), 10, SkIntToScalar(textYOffset[y]), paint);
63 }
64
65 // setup work needed to draw text with different clips
66 canvas->translate(10, 160);
67 paint.setTextSize(40);
68
69 // compute the bounds of the text
70 SkRect bounds;
71 paint.measureText(text, strlen(text), &bounds);
72
73 const SkScalar boundsHalfWidth = bounds.width() * SK_ScalarHalf;
74 const SkScalar boundsHalfHeight = bounds.height() * SK_ScalarHalf;
75 const SkScalar boundsQuarterWidth = boundsHalfWidth * SK_ScalarHalf;
76 const SkScalar boundsQuarterHeight = boundsHalfHeight * SK_ScalarHalf;
77
78 SkRect upperLeftClip = SkRect::MakeXYWH(bounds.left(), bounds.top(),
79 boundsHalfWidth, boundsHalfHeight);
80 SkRect lowerRightClip = SkRect::MakeXYWH(bounds.centerX(), bounds.centerY(),
81 boundsHalfWidth, boundsHalfHeight);
82 SkRect interiorClip = bounds;
83 interiorClip.inset(boundsQuarterWidth, boundsQuarterHeight);
84
85 const SkRect clipRects[] = { bounds, upperLeftClip, lowerRightClip, interiorClip };
86
87 SkPaint clipHairline;
88 clipHairline.setColor(SK_ColorWHITE);
89 clipHairline.setStyle(SkPaint::kStroke_Style);
90
91 for (size_t x = 0; x < sizeof(clipRects) / sizeof(SkRect); ++x) {
92 canvas->save();
93 canvas->drawRect(clipRects[x], clipHairline);
94 paint.setAlpha(0x20);
95 canvas->drawText(text, strlen(text), 0, 0, paint);
96 canvas->clipRect(clipRects[x]);
97 paint.setAlpha(0xFF);
98 canvas->drawText(text, strlen(text), 0, 0, paint);
99 canvas->restore();
100 canvas->translate(0, bounds.height() + SkIntToScalar(25));
101 }
102 }
103
104 private:
105 SkTypeface* fTypeface;
106
107 typedef GM INHERITED;
108 };
109
110 //////////////////////////////////////////////////////////////////////////////
111
112 #if !defined(SK_BUILD_FOR_ANDROID)
113 // fail for now until the appropriate freetype changes are submitted
MyFactory(void *)114 static GM* MyFactory(void*) { return new ColorEmojiGM; }
115 static GMRegistry reg(MyFactory);
116 #endif
117
118 }
119