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
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
|
/*
* Copyright 2012 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 "SkBlurMask.h"
#include "SkCanvas.h"
#include "SkMaskFilter.h"
#include "SkPath.h"
#define STROKE_WIDTH SkIntToScalar(10)
typedef void (*Proc)(SkCanvas*, const SkRect&, const SkPaint&);
static void fill_rect(SkCanvas* canvas, const SkRect& r, const SkPaint& p) {
canvas->drawRect(r, p);
}
static void draw_donut(SkCanvas* canvas, const SkRect& r, const SkPaint& p) {
SkRect rect;
SkPath path;
rect = r;
rect.outset(STROKE_WIDTH/2, STROKE_WIDTH/2);
path.addRect(rect);
rect = r;
rect.inset(STROKE_WIDTH/2, STROKE_WIDTH/2);
path.addRect(rect);
path.setFillType(SkPath::kEvenOdd_FillType);
canvas->drawPath(path, p);
}
static void draw_donut_skewed(SkCanvas* canvas, const SkRect& r, const SkPaint& p) {
SkRect rect;
SkPath path;
rect = r;
rect.outset(STROKE_WIDTH/2, STROKE_WIDTH/2);
path.addRect(rect);
rect = r;
rect.inset(STROKE_WIDTH/2, STROKE_WIDTH/2);
rect.offset(7, -7);
path.addRect(rect);
path.setFillType(SkPath::kEvenOdd_FillType);
canvas->drawPath(path, p);
}
#include "SkGradientShader.h"
/*
* Spits out a dummy gradient to test blur with shader on paint
*/
static sk_sp<SkShader> make_radial() {
SkPoint pts[2] = {
{ 0, 0 },
{ SkIntToScalar(100), SkIntToScalar(100) }
};
SkShader::TileMode tm = SkShader::kClamp_TileMode;
const SkColor colors[] = { SK_ColorRED, SK_ColorGREEN, };
const SkScalar pos[] = { SK_Scalar1/4, SK_Scalar1*3/4 };
SkMatrix scale;
scale.setScale(0.5f, 0.5f);
scale.postTranslate(25.f, 25.f);
SkPoint center0, center1;
center0.set(SkScalarAve(pts[0].fX, pts[1].fX),
SkScalarAve(pts[0].fY, pts[1].fY));
center1.set(SkScalarInterp(pts[0].fX, pts[1].fX, SkIntToScalar(3)/5),
SkScalarInterp(pts[0].fY, pts[1].fY, SkIntToScalar(1)/4));
return SkGradientShader::MakeTwoPointConical(center1, (pts[1].fX - pts[0].fX) / 7,
center0, (pts[1].fX - pts[0].fX) / 2,
colors, pos, SK_ARRAY_COUNT(colors), tm,
0, &scale);
}
typedef void (*PaintProc)(SkPaint*, SkScalar width);
class BlurRectGM : public skiagm::GM {
sk_sp<SkMaskFilter> fMaskFilters[kLastEnum_SkBlurStyle + 1];
SkString fName;
SkAlpha fAlpha;
public:
BlurRectGM(const char name[], U8CPU alpha)
: fName(name)
, fAlpha(SkToU8(alpha)) {
}
protected:
void onOnceBeforeDraw() override {
for (int i = 0; i <= kLastEnum_SkBlurStyle; ++i) {
fMaskFilters[i] = SkMaskFilter::MakeBlur((SkBlurStyle)i,
SkBlurMask::ConvertRadiusToSigma(SkIntToScalar(STROKE_WIDTH/2)));
}
}
SkString onShortName() override {
return fName;
}
SkISize onISize() override {
return SkISize::Make(860, 820);
}
void onDraw(SkCanvas* canvas) override {
canvas->translate(STROKE_WIDTH*3/2, STROKE_WIDTH*3/2);
SkRect r = { 0, 0, 100, 50 };
SkScalar scales[] = { SK_Scalar1, 0.6f };
for (size_t s = 0; s < SK_ARRAY_COUNT(scales); ++s) {
canvas->save();
for (size_t f = 0; f < SK_ARRAY_COUNT(fMaskFilters); ++f) {
SkPaint paint;
paint.setMaskFilter(fMaskFilters[f]);
paint.setAlpha(fAlpha);
SkPaint paintWithRadial = paint;
paintWithRadial.setShader(make_radial());
constexpr Proc procs[] = {
fill_rect, draw_donut, draw_donut_skewed
};
canvas->save();
canvas->scale(scales[s], scales[s]);
this->drawProcs(canvas, r, paint, false, procs, SK_ARRAY_COUNT(procs));
canvas->translate(r.width() * 4/3, 0);
this->drawProcs(canvas, r, paintWithRadial, false, procs, SK_ARRAY_COUNT(procs));
canvas->translate(r.width() * 4/3, 0);
this->drawProcs(canvas, r, paint, true, procs, SK_ARRAY_COUNT(procs));
canvas->translate(r.width() * 4/3, 0);
this->drawProcs(canvas, r, paintWithRadial, true, procs, SK_ARRAY_COUNT(procs));
canvas->restore();
canvas->translate(0, SK_ARRAY_COUNT(procs) * r.height() * 4/3 * scales[s]);
}
canvas->restore();
canvas->translate(4 * r.width() * 4/3 * scales[s], 0);
}
}
private:
void drawProcs(SkCanvas* canvas, const SkRect& r, const SkPaint& paint,
bool doClip, const Proc procs[], size_t procsCount) {
SkAutoCanvasRestore acr(canvas, true);
for (size_t i = 0; i < procsCount; ++i) {
if (doClip) {
SkRect clipRect(r);
clipRect.inset(STROKE_WIDTH/2, STROKE_WIDTH/2);
canvas->save();
canvas->clipRect(r);
}
procs[i](canvas, r, paint);
if (doClip) {
canvas->restore();
}
canvas->translate(0, r.height() * 4/3);
}
}
private:
typedef GM INHERITED;
};
DEF_SIMPLE_GM(blurrect_gallery, canvas, 1200, 1024) {
const int fGMWidth = 1200;
const int fPadding = 10;
const int fMargin = 100;
const int widths[] = {25, 5, 5, 100, 150, 25};
const int heights[] = {100, 100, 5, 25, 150, 25};
const SkBlurStyle styles[] = {kNormal_SkBlurStyle, kInner_SkBlurStyle, kOuter_SkBlurStyle};
const float radii[] = {20, 5, 10};
canvas->translate(50,20);
int cur_x = 0;
int cur_y = 0;
int max_height = 0;
for (size_t i = 0 ; i < SK_ARRAY_COUNT(widths) ; i++) {
int width = widths[i];
int height = heights[i];
SkRect r;
r.setWH(SkIntToScalar(width), SkIntToScalar(height));
SkAutoCanvasRestore autoRestore(canvas, true);
for (size_t j = 0 ; j < SK_ARRAY_COUNT(radii) ; j++) {
float radius = radii[j];
for (size_t k = 0 ; k < SK_ARRAY_COUNT(styles) ; k++) {
SkBlurStyle style = styles[k];
SkMask mask;
if (!SkBlurMask::BlurRect(SkBlurMask::ConvertRadiusToSigma(radius),
&mask, r, style)) {
continue;
}
SkAutoMaskFreeImage amfi(mask.fImage);
SkBitmap bm;
bm.installMaskPixels(mask);
if (cur_x + bm.width() >= fGMWidth - fMargin) {
cur_x = 0;
cur_y += max_height + fPadding;
max_height = 0;
}
canvas->save();
canvas->translate((SkScalar)cur_x, (SkScalar)cur_y);
canvas->translate(-(bm.width() - r.width())/2, -(bm.height()-r.height())/2);
canvas->drawBitmap(bm, 0.f, 0.f, nullptr);
canvas->restore();
cur_x += bm.width() + fPadding;
if (bm.height() > max_height)
max_height = bm.height();
}
}
}
}
//////////////////////////////////////////////////////////////////////////////
DEF_GM(return new BlurRectGM("blurrects", 0xFF);)
|
