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
|
/*
* Copyright 2013 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 "SkArithmeticMode.h"
#include "SkImage.h"
#include "SkImageSource.h"
#include "SkOffsetImageFilter.h"
#include "SkXfermodeImageFilter.h"
#define WIDTH 600
#define HEIGHT 700
#define MARGIN 12
namespace skiagm {
class XfermodeImageFilterGM : public GM {
public:
XfermodeImageFilterGM(){
this->setBGColor(0xFF000000);
}
protected:
SkString onShortName() override {
return SkString("xfermodeimagefilter");
}
SkISize onISize() override {
return SkISize::Make(WIDTH, HEIGHT);
}
void onOnceBeforeDraw() override {
fBitmap = sk_tool_utils::create_string_bitmap(80, 80, 0xD000D000, 15, 65, 96, "e");
fCheckerboard = SkImage::MakeFromBitmap(
sk_tool_utils::create_checkerboard_bitmap(80, 80,
sk_tool_utils::color_to_565(0xFFA0A0A0),
sk_tool_utils::color_to_565(0xFF404040),
8));
}
void onDraw(SkCanvas* canvas) override {
canvas->clear(SK_ColorBLACK);
SkPaint paint;
const struct {
SkXfermode::Mode fMode;
const char* fLabel;
} gModes[] = {
{ SkXfermode::kClear_Mode, "Clear" },
{ SkXfermode::kSrc_Mode, "Src" },
{ SkXfermode::kDst_Mode, "Dst" },
{ SkXfermode::kSrcOver_Mode, "SrcOver" },
{ SkXfermode::kDstOver_Mode, "DstOver" },
{ SkXfermode::kSrcIn_Mode, "SrcIn" },
{ SkXfermode::kDstIn_Mode, "DstIn" },
{ SkXfermode::kSrcOut_Mode, "SrcOut" },
{ SkXfermode::kDstOut_Mode, "DstOut" },
{ SkXfermode::kSrcATop_Mode, "SrcATop" },
{ SkXfermode::kDstATop_Mode, "DstATop" },
{ SkXfermode::kXor_Mode, "Xor" },
{ SkXfermode::kPlus_Mode, "Plus" },
{ SkXfermode::kModulate_Mode, "Modulate" },
{ SkXfermode::kScreen_Mode, "Screen" },
{ SkXfermode::kOverlay_Mode, "Overlay" },
{ SkXfermode::kDarken_Mode, "Darken" },
{ SkXfermode::kLighten_Mode, "Lighten" },
{ SkXfermode::kColorDodge_Mode, "ColorDodge" },
{ SkXfermode::kColorBurn_Mode, "ColorBurn" },
{ SkXfermode::kHardLight_Mode, "HardLight" },
{ SkXfermode::kSoftLight_Mode, "SoftLight" },
{ SkXfermode::kDifference_Mode, "Difference" },
{ SkXfermode::kExclusion_Mode, "Exclusion" },
{ SkXfermode::kMultiply_Mode, "Multiply" },
{ SkXfermode::kHue_Mode, "Hue" },
{ SkXfermode::kSaturation_Mode, "Saturation" },
{ SkXfermode::kColor_Mode, "Color" },
{ SkXfermode::kLuminosity_Mode, "Luminosity" },
};
int x = 0, y = 0;
SkAutoTUnref<SkImageFilter> background(SkImageSource::Create(fCheckerboard.get()));
for (size_t i = 0; i < SK_ARRAY_COUNT(gModes); i++) {
paint.setImageFilter(SkXfermodeImageFilter::Make(SkXfermode::Make(gModes[i].fMode),
background));
DrawClippedBitmap(canvas, fBitmap, paint, x, y);
x += fBitmap.width() + MARGIN;
if (x + fBitmap.width() > WIDTH) {
x = 0;
y += fBitmap.height() + MARGIN;
}
}
// Test arithmetic mode as image filter
paint.setImageFilter(SkXfermodeImageFilter::Make(
SkArithmeticMode::Make(0, SK_Scalar1, SK_Scalar1, 0), background));
DrawClippedBitmap(canvas, fBitmap, paint, x, y);
x += fBitmap.width() + MARGIN;
if (x + fBitmap.width() > WIDTH) {
x = 0;
y += fBitmap.height() + MARGIN;
}
// Test nullptr mode
paint.setImageFilter(SkXfermodeImageFilter::Make(nullptr, background));
DrawClippedBitmap(canvas, fBitmap, paint, x, y);
x += fBitmap.width() + MARGIN;
if (x + fBitmap.width() > WIDTH) {
x = 0;
y += fBitmap.height() + MARGIN;
}
SkRect clipRect = SkRect::MakeWH(SkIntToScalar(fBitmap.width() + 4),
SkIntToScalar(fBitmap.height() + 4));
// Test offsets on SrcMode (uses fixed-function blend)
sk_sp<SkImage> bitmapImage(SkImage::MakeFromBitmap(fBitmap));
SkAutoTUnref<SkImageFilter> foreground(SkImageSource::Create(bitmapImage.get()));
SkAutoTUnref<SkImageFilter> offsetForeground(SkOffsetImageFilter::Create(
SkIntToScalar(4), SkIntToScalar(-4), foreground));
SkAutoTUnref<SkImageFilter> offsetBackground(SkOffsetImageFilter::Create(
SkIntToScalar(4), SkIntToScalar(4), background));
paint.setImageFilter(SkXfermodeImageFilter::Make(
SkXfermode::Make(SkXfermode::kSrcOver_Mode), offsetBackground,
offsetForeground, nullptr));
DrawClippedPaint(canvas, clipRect, paint, x, y);
x += fBitmap.width() + MARGIN;
if (x + fBitmap.width() > WIDTH) {
x = 0;
y += fBitmap.height() + MARGIN;
}
// Test offsets on Darken (uses shader blend)
paint.setImageFilter(SkXfermodeImageFilter::Make(SkXfermode::Make(SkXfermode::kDarken_Mode),
offsetBackground, offsetForeground, nullptr));
DrawClippedPaint(canvas, clipRect, paint, x, y);
x += fBitmap.width() + MARGIN;
if (x + fBitmap.width() > WIDTH) {
x = 0;
y += fBitmap.height() + MARGIN;
}
// Test cropping
static const size_t nbSamples = 3;
SkXfermode::Mode sampledModes[nbSamples] = {SkXfermode::kOverlay_Mode,
SkXfermode::kSrcOver_Mode,
SkXfermode::kPlus_Mode};
int offsets[nbSamples][4] = {{ 10, 10, -16, -16},
{ 10, 10, 10, 10},
{-10, -10, -6, -6}};
for (size_t i = 0; i < nbSamples; ++i) {
SkIRect cropRect = SkIRect::MakeXYWH(offsets[i][0],
offsets[i][1],
fBitmap.width() + offsets[i][2],
fBitmap.height() + offsets[i][3]);
SkImageFilter::CropRect rect(SkRect::Make(cropRect));
paint.setImageFilter(SkXfermodeImageFilter::Make(
SkXfermode::Make(sampledModes[i]), offsetBackground, offsetForeground, &rect));
DrawClippedPaint(canvas, clipRect, paint, x, y);
x += fBitmap.width() + MARGIN;
if (x + fBitmap.width() > WIDTH) {
x = 0;
y += fBitmap.height() + MARGIN;
}
}
// Test small bg, large fg with Screen (uses shader blend)
auto mode = SkXfermode::Make(SkXfermode::kScreen_Mode);
SkImageFilter::CropRect cropRect(SkRect::MakeXYWH(10, 10, 60, 60));
SkAutoTUnref<SkImageFilter> cropped(
SkOffsetImageFilter::Create(0, 0, foreground, &cropRect));
paint.setImageFilter(SkXfermodeImageFilter::Make(mode, cropped, background, nullptr));
DrawClippedPaint(canvas, clipRect, paint, x, y);
x += fBitmap.width() + MARGIN;
if (x + fBitmap.width() > WIDTH) {
x = 0;
y += fBitmap.height() + MARGIN;
}
// Test small fg, large bg with Screen (uses shader blend)
paint.setImageFilter(SkXfermodeImageFilter::Make(mode, background, cropped, nullptr));
DrawClippedPaint(canvas, clipRect, paint, x, y);
x += fBitmap.width() + MARGIN;
if (x + fBitmap.width() > WIDTH) {
x = 0;
y += fBitmap.height() + MARGIN;
}
}
private:
static void DrawClippedBitmap(SkCanvas* canvas, const SkBitmap& bitmap, const SkPaint& paint,
int x, int y) {
canvas->save();
canvas->translate(SkIntToScalar(x), SkIntToScalar(y));
canvas->clipRect(SkRect::MakeWH(
SkIntToScalar(bitmap.width()), SkIntToScalar(bitmap.height())));
canvas->drawBitmap(bitmap, 0, 0, &paint);
canvas->restore();
}
static void DrawClippedPaint(SkCanvas* canvas, const SkRect& rect, const SkPaint& paint,
int x, int y) {
canvas->save();
canvas->translate(SkIntToScalar(x), SkIntToScalar(y));
canvas->clipRect(rect);
canvas->drawPaint(paint);
canvas->restore();
}
SkBitmap fBitmap;
sk_sp<SkImage> fCheckerboard;
typedef GM INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
DEF_GM( return new XfermodeImageFilterGM; );
}
|
