blob: 8286177ae7a92c09cb113c5e26b032e75a3ec56b (
plain)
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
|
/*
* 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 "SampleCode.h"
#include "SkBlurMask.h"
#include "SkBlurMaskFilter.h"
#include "SkCanvas.h"
#include "SkGradientShader.h"
#include "SkGraphics.h"
#include "SkPath.h"
#include "SkRandom.h"
#include "SkRegion.h"
#include "SkShader.h"
#include "SkUtils.h"
#include "SkColorPriv.h"
#include "SkColorFilter.h"
#include "SkTime.h"
#include "SkTypeface.h"
#include "SkView.h"
#include "SkOSFile.h"
#include "SkStream.h"
class TextAlphaView : public SampleView {
public:
TextAlphaView() {
fByte = 0xFF;
}
protected:
// overrides from SkEventSink
bool onQuery(SkEvent* evt) override {
if (SampleCode::TitleQ(*evt)) {
SampleCode::TitleR(evt, "TextAlpha");
return true;
}
return this->INHERITED::onQuery(evt);
}
void onDrawContent(SkCanvas* canvas) override {
const char* str = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
SkPaint paint;
SkScalar x = SkIntToScalar(10);
SkScalar y = SkIntToScalar(20);
paint.setFlags(0x105);
paint.setARGB(fByte, 0xFF, 0xFF, 0xFF);
paint.setMaskFilter(SkBlurMaskFilter::Make(kNormal_SkBlurStyle,
SkBlurMask::ConvertRadiusToSigma(3)));
SkRandom rand;
for (int ps = 6; ps <= 35; ps++) {
paint.setColor(rand.nextU() | (0xFF << 24));
paint.setTextSize(SkIntToScalar(ps));
paint.setTextSize(SkIntToScalar(24));
canvas->drawText(str, strlen(str), x, y, paint);
y += paint.getFontMetrics(nullptr);
}
}
SkView::Click* onFindClickHandler(SkScalar x, SkScalar y, unsigned) override {
return new Click(this);
}
bool onClick(Click* click) override {
int y = click->fICurr.fY;
if (y < 0) {
y = 0;
} else if (y > 255) {
y = 255;
}
fByte = y;
this->inval(nullptr);
return true;
}
private:
int fByte;
typedef SampleView INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
static SkView* MyFactory() { return new TextAlphaView; }
static SkViewRegister reg(MyFactory);
|
