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/gm.h"
9 #include "include/core/SkCanvas.h"
10 #include "include/core/SkColor.h"
11 #include "include/core/SkFont.h"
12 #include "include/core/SkFontTypes.h"
13 #include "include/core/SkPaint.h"
14 #include "include/core/SkRect.h"
15 #include "include/core/SkRefCnt.h"
16 #include "include/core/SkScalar.h"
17 #include "include/core/SkSize.h"
18 #include "include/core/SkString.h"
19 #include "include/core/SkTextBlob.h"
20 #include "include/core/SkTypeface.h"
21 #include "tools/Resources.h"
22 #include "tools/ToolUtils.h"
23 #include "tools/fonts/FontToolUtils.h"
24
25 #include <string.h>
26
27 namespace skiagm {
28
draw_blob(SkCanvas * canvas,const SkTextBlob * blob,const SkPaint & skPaint,const SkRect & clipRect)29 static void draw_blob(SkCanvas* canvas, const SkTextBlob* blob, const SkPaint& skPaint,
30 const SkRect& clipRect) {
31 SkPaint clipHairline;
32 clipHairline.setColor(SK_ColorWHITE);
33 clipHairline.setStyle(SkPaint::kStroke_Style);
34
35 SkPaint paint(skPaint);
36 canvas->save();
37 canvas->drawRect(clipRect, clipHairline);
38 paint.setAlphaf(0.125f);
39 canvas->drawTextBlob(blob, 0, 0, paint);
40 canvas->clipRect(clipRect);
41 paint.setAlphaf(1.0f);
42 canvas->drawTextBlob(blob, 0, 0, paint);
43 canvas->restore();
44 }
45
46 class MixedTextBlobsGM : public GM {
47 public:
MixedTextBlobsGM()48 MixedTextBlobsGM() { }
49
50 protected:
onOnceBeforeDraw()51 void onOnceBeforeDraw() override {
52 fEmojiTypeface = ToolUtils::PlanetTypeface();
53 fEmojiText = "♁♃";
54 fReallyBigATypeface = ToolUtils::CreateTypefaceFromResource("fonts/ReallyBigA.ttf");
55 if (!fReallyBigATypeface) {
56 fReallyBigATypeface = ToolUtils::DefaultPortableTypeface();
57 }
58
59 SkTextBlobBuilder builder;
60
61 // make textblob
62 // Text so large we draw as paths
63 SkFont font(ToolUtils::DefaultPortableTypeface(), 385);
64 font.setEdging(SkFont::Edging::kAlias);
65 const char* text = "O";
66
67 SkRect bounds;
68 font.measureText(text, strlen(text), SkTextEncoding::kUTF8, &bounds);
69
70 SkScalar yOffset = bounds.height();
71 ToolUtils::add_to_text_blob(&builder, text, font, 10, yOffset);
72 SkScalar corruptedAx = bounds.width();
73 SkScalar corruptedAy = yOffset;
74
75 const SkScalar boundsHalfWidth = bounds.width() * SK_ScalarHalf;
76 const SkScalar boundsHalfHeight = bounds.height() * SK_ScalarHalf;
77
78 SkScalar xOffset = boundsHalfWidth;
79 yOffset = boundsHalfHeight;
80
81 // LCD
82 font.setSize(32);
83 font.setEdging(SkFont::Edging::kSubpixelAntiAlias);
84 font.setSubpixel(true);
85 text = "LCD!!!!!";
86 font.measureText(text, strlen(text), SkTextEncoding::kUTF8, &bounds);
87 ToolUtils::add_to_text_blob(&builder,
88 text,
89 font,
90 xOffset - bounds.width() * 0.25f,
91 yOffset - bounds.height() * 0.5f);
92
93 // color emoji font with large glyph
94 if (fEmojiTypeface) {
95 font.setEdging(SkFont::Edging::kAlias);
96 font.setSubpixel(false);
97 font.setTypeface(fEmojiTypeface);
98 font.measureText(fEmojiText, strlen(fEmojiText), SkTextEncoding::kUTF8, &bounds);
99 ToolUtils::add_to_text_blob(&builder, fEmojiText, font, xOffset, yOffset);
100 }
101
102 // outline font with large glyph
103 font.setSize(12);
104 text = "aA";
105 font.setTypeface(fReallyBigATypeface);
106 ToolUtils::add_to_text_blob(&builder, text, font, corruptedAx, corruptedAy);
107 fBlob = builder.make();
108 }
109
getName() const110 SkString getName() const override { return SkString("mixedtextblobs"); }
111
getISize()112 SkISize getISize() override { return SkISize::Make(kWidth, kHeight); }
113
onDraw(SkCanvas * canvas)114 void onDraw(SkCanvas* canvas) override {
115
116 canvas->drawColor(SK_ColorGRAY);
117
118 SkPaint paint;
119
120 // setup work needed to draw text with different clips
121 paint.setColor(SK_ColorBLACK);
122 canvas->translate(10, 40);
123
124 // compute the bounds of the text and setup some clips
125 SkRect bounds = fBlob->bounds();
126
127 const SkScalar boundsHalfWidth = bounds.width() * SK_ScalarHalf;
128 const SkScalar boundsHalfHeight = bounds.height() * SK_ScalarHalf;
129 const SkScalar boundsQuarterWidth = boundsHalfWidth * SK_ScalarHalf;
130 const SkScalar boundsQuarterHeight = boundsHalfHeight * SK_ScalarHalf;
131
132 SkRect upperLeftClip = SkRect::MakeXYWH(bounds.left(), bounds.top(),
133 boundsHalfWidth, boundsHalfHeight);
134 SkRect lowerRightClip = SkRect::MakeXYWH(bounds.centerX(), bounds.centerY(),
135 boundsHalfWidth, boundsHalfHeight);
136 SkRect interiorClip = bounds;
137 interiorClip.inset(boundsQuarterWidth, boundsQuarterHeight);
138
139 const SkRect clipRects[] = { bounds, upperLeftClip, lowerRightClip, interiorClip};
140
141 size_t count = sizeof(clipRects) / sizeof(SkRect);
142 for (size_t x = 0; x < count; ++x) {
143 draw_blob(canvas, fBlob.get(), paint, clipRects[x]);
144 if (x == (count >> 1) - 1) {
145 canvas->translate(SkScalarFloorToScalar(bounds.width() + SkIntToScalar(25)),
146 -(x * SkScalarFloorToScalar(bounds.height() +
147 SkIntToScalar(25))));
148 } else {
149 canvas->translate(0, SkScalarFloorToScalar(bounds.height() + SkIntToScalar(25)));
150 }
151 }
152 }
153
154 private:
155 sk_sp<SkTypeface> fEmojiTypeface;
156 sk_sp<SkTypeface> fReallyBigATypeface;
157 const char* fEmojiText;
158 sk_sp<SkTextBlob> fBlob;
159
160 inline static constexpr int kWidth = 1250;
161 inline static constexpr int kHeight = 700;
162
163 using INHERITED = GM;
164 };
165
166 //////////////////////////////////////////////////////////////////////////////
167
168 DEF_GM(return new MixedTextBlobsGM;)
169 } // namespace skiagm
170