1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
|
/*
* Copyright 2015 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "gm.h"
#include "sk_tool_utils.h"
#include "Resources.h"
#include "SkCanvas.h"
#include "SkGradientShader.h"
#include "SkRandomScalerContext.h"
#include "SkStream.h"
#include "SkSurface.h"
#include "SkTextBlob.h"
#include "SkTypeface.h"
#if SK_SUPPORT_GPU
#include "GrContext.h"
namespace skiagm {
class TextBlobRandomFont : public GM {
public:
// This gm tests that textblobs can be translated and scaled with a font that returns random
// but deterministic masks
TextBlobRandomFont() { }
protected:
void onOnceBeforeDraw() override {
SkTextBlobBuilder builder;
const char* text = "The quick brown fox jumps over the lazy dog.";
// make textbloben
SkPaint paint;
paint.setTextSize(32);
paint.setAntiAlias(true);
paint.setLCDRenderText(true);
// Setup our random scaler context
auto typeface = sk_tool_utils::create_portable_typeface("sans-serif", SkFontStyle::Bold());
if (!typeface) {
typeface = SkTypeface::MakeDefault();
}
paint.setColor(SK_ColorMAGENTA);
paint.setTypeface(sk_make_sp<SkRandomTypeface>(std::move(typeface), paint, false));
SkScalar y = 0;
SkRect bounds;
paint.measureText(text, strlen(text), &bounds);
y -= bounds.fTop;
sk_tool_utils::add_to_text_blob(&builder, text, paint, 0, y);
y += bounds.fBottom;
// A8
const char* bigtext1 = "The quick brown fox";
const char* bigtext2 = "jumps over the lazy dog.";
paint.setTextSize(160);
paint.setSubpixelText(false);
paint.setLCDRenderText(false);
paint.measureText(bigtext1, strlen(bigtext1), &bounds);
y -= bounds.fTop;
sk_tool_utils::add_to_text_blob(&builder, bigtext1, paint, 0, y);
y += bounds.fBottom;
paint.measureText(bigtext2, strlen(bigtext2), &bounds);
y -= bounds.fTop;
sk_tool_utils::add_to_text_blob(&builder, bigtext2, paint, 0, y);
y += bounds.fBottom;
// color emoji
if (sk_sp<SkTypeface> origEmoji = sk_tool_utils::emoji_typeface()) {
paint.setTypeface(sk_make_sp<SkRandomTypeface>(origEmoji, paint, false));
const char* emojiText = sk_tool_utils::emoji_sample_text();
paint.measureText(emojiText, strlen(emojiText), &bounds);
y -= bounds.fTop;
sk_tool_utils::add_to_text_blob(&builder, emojiText, paint, 0, y);
y += bounds.fBottom;
}
// build
fBlob = builder.make();
}
SkString onShortName() override {
return SkString("textblobrandomfont");
}
SkISize onISize() override {
return SkISize::Make(kWidth, kHeight);
}
void onDraw(SkCanvas* canvas) override {
// This GM exists to test a specific feature of the GPU backend.
// This GM uses sk_tool_utils::makeSurface which doesn't work well with vias.
// This GM uses SkRandomTypeface which doesn't work well with serialization.
if (nullptr == canvas->getGrContext()) {
skiagm::GM::DrawGpuOnlyMessage(canvas);
return;
}
canvas->drawColor(sk_tool_utils::color_to_565(SK_ColorWHITE));
SkImageInfo info = SkImageInfo::Make(kWidth, kHeight, canvas->imageInfo().colorType(),
kPremul_SkAlphaType,
canvas->imageInfo().refColorSpace());
SkSurfaceProps props(0, kUnknown_SkPixelGeometry);
auto surface(sk_tool_utils::makeSurface(canvas, info, &props));
if (!surface) {
const char* text = "This test requires a surface";
size_t len = strlen(text);
SkPaint paint;
canvas->drawText(text, len, 10, 100, paint);
return;
}
SkPaint paint;
paint.setAntiAlias(true);
SkCanvas* c = surface->getCanvas();
SkScalar stride = SkScalarCeilToScalar(fBlob->bounds().height());
SkScalar yOffset = 5;
for (int i = 0; i < 1; i++) {
// fiddle the canvas to force regen of textblobs
canvas->rotate(i % 2 ? 0.0f : -0.05f);
canvas->drawTextBlob(fBlob, 10, yOffset, paint);
yOffset += stride;
// this will test lcd masks when not requested
// on cpu this currently causes unspecified behavior, so avoid until it is fixed
if (canvas->getGrContext()) {
c->drawTextBlob(fBlob, 10, yOffset, paint);
surface->draw(canvas, 0, 0, nullptr);
}
yOffset += stride;
// free gpu resources and verify
if (canvas->getGrContext()) {
canvas->getGrContext()->freeGpuResources();
}
canvas->drawTextBlob(fBlob, 10, yOffset, paint);
yOffset += stride;
}
}
private:
sk_sp<SkTextBlob> fBlob;
static constexpr int kWidth = 2000;
static constexpr int kHeight = 1600;
typedef GM INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
DEF_GM(return new TextBlobRandomFont;)
}
#endif
|
