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
|
/*
* Copyright 2011 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 "SkCanvas.h"
#include "SkPath.h"
#include "SkGradientShader.h"
#include "SkTypeface.h"
static sk_sp<SkShader> make_heatGradient(const SkPoint pts[2]) {
const SkColor bw[] = { SK_ColorBLACK, SK_ColorWHITE };
return SkGradientShader::MakeLinear(pts, bw, nullptr, SK_ARRAY_COUNT(bw),
SkShader::kClamp_TileMode);
}
/**
Test a set of clipping problems discovered while writing blitAntiRect,
and test all the code paths through the clipping blitters.
Each region should show as a blue center surrounded by a 2px green
border, with no red.
*/
#define HEIGHT 480
class GammaTextGM : public skiagm::GM {
protected:
SkString onShortName() override {
SkString name("gammatext");
name.append(sk_tool_utils::platform_font_manager());
return name;
}
SkISize onISize() override {
return SkISize::Make(1024, HEIGHT);
}
static void drawGrad(SkCanvas* canvas) {
const SkPoint pts[] = { { 0, 0 }, { 0, SkIntToScalar(HEIGHT) } };
canvas->clear(SK_ColorRED);
SkPaint paint;
paint.setShader(make_heatGradient(pts));
SkRect r = { 0, 0, SkIntToScalar(1024), SkIntToScalar(HEIGHT) };
canvas->drawRect(r, paint);
}
void onDraw(SkCanvas* canvas) override {
drawGrad(canvas);
const SkColor fg[] = {
0xFFFFFFFF,
0xFFFFFF00, 0xFFFF00FF, 0xFF00FFFF,
0xFFFF0000, 0xFF00FF00, 0xFF0000FF,
0xFF000000,
};
const char* text = "Hamburgefons";
size_t len = strlen(text);
SkPaint paint;
paint.setTextSize(SkIntToScalar(16));
paint.setAntiAlias(true);
paint.setLCDRenderText(true);
SkScalar x = SkIntToScalar(10);
for (size_t i = 0; i < SK_ARRAY_COUNT(fg); ++i) {
paint.setColor(fg[i]);
SkScalar y = SkIntToScalar(40);
SkScalar stopy = SkIntToScalar(HEIGHT);
while (y < stopy) {
canvas->drawText(text, len, x, y, paint);
y += paint.getTextSize() * 2;
}
x += SkIntToScalar(1024) / SK_ARRAY_COUNT(fg);
}
}
private:
typedef skiagm::GM INHERITED;
};
DEF_GM( return new GammaTextGM; )
//////////////////////////////////////////////////////////////////////////////
static sk_sp<SkShader> make_gradient(SkColor c) {
const SkPoint pts[] = { { 0, 0 }, { 240, 0 } };
SkColor colors[2];
colors[0] = c;
colors[1] = SkColorSetA(c, 0);
return SkGradientShader::MakeLinear(pts, colors, nullptr, 2, SkShader::kClamp_TileMode);
}
static void set_face(SkPaint* paint) {
paint->setTypeface(SkTypeface::MakeFromName("serif", SkFontStyle::Italic()));
}
static void draw_pair(SkCanvas* canvas, SkPaint* paint, const sk_sp<SkShader>& shader) {
const char text[] = "Now is the time for all good";
const size_t len = strlen(text);
paint->setShader(nullptr);
canvas->drawText(text, len, 10, 20, *paint);
paint->setShader(SkShader::MakeColorShader(paint->getColor()));
canvas->drawText(text, len, 10, 40, *paint);
paint->setShader(shader);
canvas->drawText(text, len, 10, 60, *paint);
}
class GammaShaderTextGM : public skiagm::GM {
sk_sp<SkShader> fShaders[3];
SkColor fColors[3];
public:
GammaShaderTextGM() {
const SkColor colors[] = { SK_ColorBLACK, SK_ColorRED, SK_ColorBLUE };
for (size_t i = 0; i < SK_ARRAY_COUNT(fShaders); ++i) {
fColors[i] = colors[i];
}
}
protected:
SkString onShortName() override {
return SkString("gammagradienttext");
}
SkISize onISize() override {
return SkISize::Make(300, 300);
}
void onOnceBeforeDraw() override {
for (size_t i = 0; i < SK_ARRAY_COUNT(fShaders); ++i) {
fShaders[i] = make_gradient(fColors[i]);
}
}
void onDraw(SkCanvas* canvas) override {
SkPaint paint;
paint.setAntiAlias(true);
paint.setLCDRenderText(true);
paint.setTextSize(18);
set_face(&paint);
for (size_t i = 0; i < SK_ARRAY_COUNT(fShaders); ++i) {
paint.setColor(fColors[i]);
draw_pair(canvas, &paint, fShaders[i]);
canvas->translate(0, 80);
}
}
private:
typedef skiagm::GM INHERITED;
};
DEF_GM( return new GammaShaderTextGM; )
|
