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 "sk_tool_utils.h"
10
11 #include "Resources.h"
12 #include "SkCanvas.h"
13 #include "SkGradientShader.h"
14 #include "SkStream.h"
15 #include "SkTextBlob.h"
16 #include "SkTypeface.h"
17
18 namespace skiagm {
19
draw_blob(SkCanvas * canvas,const SkTextBlob * blob,const SkPaint & skPaint,const SkRect & clipRect)20 static void draw_blob(SkCanvas* canvas, const SkTextBlob* blob, const SkPaint& skPaint,
21 const SkRect& clipRect) {
22 SkPaint clipHairline;
23 clipHairline.setColor(SK_ColorWHITE);
24 clipHairline.setStyle(SkPaint::kStroke_Style);
25
26 SkPaint paint(skPaint);
27 canvas->save();
28 canvas->drawRect(clipRect, clipHairline);
29 paint.setAlpha(0x20);
30 canvas->drawTextBlob(blob, 0, 0, paint);
31 canvas->clipRect(clipRect);
32 paint.setAlpha(0xFF);
33 canvas->drawTextBlob(blob, 0, 0, paint);
34 canvas->restore();
35 }
36
37 class MixedTextBlobsGM : public GM {
38 public:
MixedTextBlobsGM()39 MixedTextBlobsGM() { }
40
41 protected:
onOnceBeforeDraw()42 void onOnceBeforeDraw() override {
43 fEmojiTypeface = sk_tool_utils::emoji_typeface();
44 fEmojiText = sk_tool_utils::emoji_sample_text();
45 fReallyBigATypeface = MakeResourceAsTypeface("fonts/ReallyBigA.ttf");
46
47 SkTextBlobBuilder builder;
48
49 // make textblob
50 // Text so large we draw as paths
51 SkPaint paint;
52 paint.setTextSize(385);
53 const char* text = "O";
54 sk_tool_utils::set_portable_typeface(&paint);
55
56 SkRect bounds;
57 paint.measureText(text, strlen(text), &bounds);
58
59 SkScalar yOffset = bounds.height();
60 sk_tool_utils::add_to_text_blob(&builder, text, paint, 10, yOffset);
61 SkScalar corruptedAx = bounds.width();
62 SkScalar corruptedAy = yOffset;
63
64 const SkScalar boundsHalfWidth = bounds.width() * SK_ScalarHalf;
65 const SkScalar boundsHalfHeight = bounds.height() * SK_ScalarHalf;
66
67 SkScalar xOffset = boundsHalfWidth;
68 yOffset = boundsHalfHeight;
69
70 // LCD
71 paint.setTextSize(32);
72 text = "LCD!!!!!";
73 paint.setAntiAlias(true);
74 paint.setSubpixelText(true);
75 paint.setLCDRenderText(true);
76 paint.measureText(text, strlen(text), &bounds);
77 sk_tool_utils::add_to_text_blob(&builder, text, paint, xOffset - bounds.width() * 0.25f,
78 yOffset - bounds.height() * 0.5f);
79 yOffset += bounds.height();
80
81 // color emoji
82 if (fEmojiTypeface) {
83 paint.setAntiAlias(false);
84 paint.setSubpixelText(false);
85 paint.setLCDRenderText(false);
86 paint.setTypeface(fEmojiTypeface);
87 text = fEmojiText;
88 paint.measureText(text, strlen(text), &bounds);
89 sk_tool_utils::add_to_text_blob(&builder, text, paint, xOffset - bounds.width() * 0.3f,
90 yOffset);
91 }
92
93 // Corrupted font
94 paint.setTextSize(12);
95 text = "aA";
96 paint.setTypeface(fReallyBigATypeface);
97 sk_tool_utils::add_to_text_blob(&builder, text, paint, corruptedAx, corruptedAy);
98 fBlob = builder.make();
99 }
100
onShortName()101 SkString onShortName() override {
102 return SkStringPrintf("mixedtextblobs%s",
103 sk_tool_utils::platform_font_manager());
104 }
105
onISize()106 SkISize onISize() override {
107 return SkISize::Make(kWidth, kHeight);
108 }
109
onDraw(SkCanvas * canvas)110 void onDraw(SkCanvas* canvas) override {
111
112 canvas->drawColor(sk_tool_utils::color_to_565(SK_ColorGRAY));
113
114 SkPaint paint;
115
116 // setup work needed to draw text with different clips
117 paint.setColor(SK_ColorBLACK);
118 canvas->translate(10, 40);
119
120 paint.setTextSize(40);
121
122 // compute the bounds of the text and setup some clips
123 SkRect bounds = fBlob->bounds();
124
125 const SkScalar boundsHalfWidth = bounds.width() * SK_ScalarHalf;
126 const SkScalar boundsHalfHeight = bounds.height() * SK_ScalarHalf;
127 const SkScalar boundsQuarterWidth = boundsHalfWidth * SK_ScalarHalf;
128 const SkScalar boundsQuarterHeight = boundsHalfHeight * SK_ScalarHalf;
129
130 SkRect upperLeftClip = SkRect::MakeXYWH(bounds.left(), bounds.top(),
131 boundsHalfWidth, boundsHalfHeight);
132 SkRect lowerRightClip = SkRect::MakeXYWH(bounds.centerX(), bounds.centerY(),
133 boundsHalfWidth, boundsHalfHeight);
134 SkRect interiorClip = bounds;
135 interiorClip.inset(boundsQuarterWidth, boundsQuarterHeight);
136
137 const SkRect clipRects[] = { bounds, upperLeftClip, lowerRightClip, interiorClip};
138
139 size_t count = sizeof(clipRects) / sizeof(SkRect);
140 for (size_t x = 0; x < count; ++x) {
141 draw_blob(canvas, fBlob.get(), paint, clipRects[x]);
142 if (x == (count >> 1) - 1) {
143 canvas->translate(SkScalarFloorToScalar(bounds.width() + SkIntToScalar(25)),
144 -(x * SkScalarFloorToScalar(bounds.height() +
145 SkIntToScalar(25))));
146 } else {
147 canvas->translate(0, SkScalarFloorToScalar(bounds.height() + SkIntToScalar(25)));
148 }
149 }
150 }
151
152 private:
153 sk_sp<SkTypeface> fEmojiTypeface;
154 sk_sp<SkTypeface> fReallyBigATypeface;
155 const char* fEmojiText;
156 sk_sp<SkTextBlob> fBlob;
157
158 static constexpr int kWidth = 1250;
159 static constexpr int kHeight = 700;
160
161 typedef GM INHERITED;
162 };
163
164 //////////////////////////////////////////////////////////////////////////////
165
166 DEF_GM(return new MixedTextBlobsGM;)
167 }
168