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
|
/*
* 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 "SkView.h"
#include "SkCanvas.h"
#include "SkGradientShader.h"
#include "SkPath.h"
#include "SkRegion.h"
#include "SkShader.h"
#include "SkUtils.h"
#include "Sk1DPathEffect.h"
#include "SkCornerPathEffect.h"
#include "SkPathMeasure.h"
#include "SkRandom.h"
#include "SkColorPriv.h"
#include "SkColorFilter.h"
#include "SkDither.h"
#include "sk_tool_utils.h"
static void make_bm(SkBitmap* bm) {
const SkPMColor colors[] = {
SkPreMultiplyColor(SK_ColorRED), SkPreMultiplyColor(SK_ColorGREEN),
SkPreMultiplyColor(SK_ColorBLUE), SkPreMultiplyColor(SK_ColorWHITE)
};
SkColorTable* ctable = new SkColorTable(colors, 4);
bm->allocPixels(SkImageInfo::Make(2, 2, kIndex_8_SkColorType,
kOpaque_SkAlphaType),
nullptr, ctable);
ctable->unref();
*bm->getAddr8(0, 0) = 0;
*bm->getAddr8(1, 0) = 1;
*bm->getAddr8(0, 1) = 2;
*bm->getAddr8(1, 1) = 3;
}
static SkScalar draw_bm(SkCanvas* canvas, const SkBitmap& bm,
SkScalar x, SkScalar y, SkPaint* paint) {
canvas->drawBitmap(bm, x, y, paint);
return SkIntToScalar(bm.width()) * 5/4;
}
static SkScalar draw_set(SkCanvas* c, const SkBitmap& bm, SkScalar x, SkPaint* p) {
x += draw_bm(c, bm, x, 0, p);
p->setFilterQuality(kLow_SkFilterQuality);
x += draw_bm(c, bm, x, 0, p);
p->setDither(true);
return x + draw_bm(c, bm, x, 0, p);
}
static SkScalar draw_row(SkCanvas* canvas, const SkBitmap& bm) {
SkAutoCanvasRestore acr(canvas, true);
SkPaint paint;
SkScalar x = 0;
const int scale = 32;
paint.setAntiAlias(true);
const char* name = sk_tool_utils::colortype_name(bm.colorType());
canvas->drawText(name, strlen(name), x, SkIntToScalar(bm.height())*scale*5/8,
paint);
canvas->translate(SkIntToScalar(48), 0);
canvas->scale(SkIntToScalar(scale), SkIntToScalar(scale));
x += draw_set(canvas, bm, 0, &paint);
paint.reset();
paint.setAlpha(0x80);
draw_set(canvas, bm, x, &paint);
return x * scale / 3;
}
class FilterView : public SampleView {
public:
SkBitmap fBM8, fBM4444, fBM16, fBM32;
FilterView() {
make_bm(&fBM8);
fBM8.copyTo(&fBM4444, kARGB_4444_SkColorType);
fBM8.copyTo(&fBM16, kRGB_565_SkColorType);
fBM8.copyTo(&fBM32, kN32_SkColorType);
this->setBGColor(0xFFDDDDDD);
}
protected:
// overrides from SkEventSink
virtual bool onQuery(SkEvent* evt) {
if (SampleCode::TitleQ(*evt)) {
SampleCode::TitleR(evt, "Filter");
return true;
}
return this->INHERITED::onQuery(evt);
}
virtual void onDrawContent(SkCanvas* canvas) {
SkScalar x = SkIntToScalar(10);
SkScalar y = SkIntToScalar(10);
canvas->translate(x, y);
y = draw_row(canvas, fBM8);
canvas->translate(0, y);
y = draw_row(canvas, fBM4444);
canvas->translate(0, y);
y = draw_row(canvas, fBM16);
canvas->translate(0, y);
draw_row(canvas, fBM32);
}
private:
typedef SampleView INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
static SkView* MyFactory() { return new FilterView; }
static SkViewRegister reg(MyFactory);
|
