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
|
/*
* 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 "SkArenaAlloc.h"
#include "SkBitmap.h"
#include "SkBitmapDevice.h"
#include "SkCanvas.h"
#include "SkDraw.h"
#include "SkLayerDrawLooper.h"
#include "SkMatrix.h"
#include "SkPaint.h"
#include "SkRect.h"
#include "SkRefCnt.h"
#include "SkScalar.h"
#include "Test.h"
static SkBitmap make_bm(int w, int h) {
SkBitmap bm;
bm.allocN32Pixels(w, h);
return bm;
}
// TODO: can this be derived from SkBaseDevice?
class FakeDevice : public SkBitmapDevice {
public:
FakeDevice() : INHERITED(make_bm(100, 100), SkSurfaceProps(0, kUnknown_SkPixelGeometry),
nullptr, nullptr) {
}
void drawRect(const SkRect& r, const SkPaint& paint) override {
fLastMatrix = this->ctm();
this->INHERITED::drawRect(r, paint);
}
SkMatrix fLastMatrix;
private:
typedef SkBitmapDevice INHERITED;
};
static void test_frontToBack(skiatest::Reporter* reporter) {
SkLayerDrawLooper::Builder looperBuilder;
SkLayerDrawLooper::LayerInfo layerInfo;
// Add the front layer, with the defaults.
(void)looperBuilder.addLayer(layerInfo);
// Add the back layer, with some layer info set.
layerInfo.fOffset.set(10.0f, 20.0f);
layerInfo.fPaintBits |= SkLayerDrawLooper::kXfermode_Bit;
SkPaint* layerPaint = looperBuilder.addLayer(layerInfo);
layerPaint->setBlendMode(SkBlendMode::kSrc);
FakeDevice device;
SkCanvas canvas(sk_ref_sp(&device));
SkPaint paint;
auto looper(looperBuilder.detach());
SkArenaAlloc alloc{48};
SkDrawLooper::Context* context = looper->makeContext(&canvas, &alloc);
// The back layer should come first.
REPORTER_ASSERT(reporter, context->next(&canvas, &paint));
REPORTER_ASSERT(reporter, paint.getBlendMode() == SkBlendMode::kSrc);
canvas.drawRect(SkRect::MakeWH(50.0f, 50.0f), paint);
REPORTER_ASSERT(reporter, 10.0f == device.fLastMatrix.getTranslateX());
REPORTER_ASSERT(reporter, 20.0f == device.fLastMatrix.getTranslateY());
paint.reset();
// Then the front layer.
REPORTER_ASSERT(reporter, context->next(&canvas, &paint));
REPORTER_ASSERT(reporter, paint.getBlendMode() == SkBlendMode::kSrcOver);
canvas.drawRect(SkRect::MakeWH(50.0f, 50.0f), paint);
REPORTER_ASSERT(reporter, 0.0f == device.fLastMatrix.getTranslateX());
REPORTER_ASSERT(reporter, 0.0f == device.fLastMatrix.getTranslateY());
// Only two layers were added, so that should be the end.
REPORTER_ASSERT(reporter, !context->next(&canvas, &paint));
}
static void test_backToFront(skiatest::Reporter* reporter) {
SkLayerDrawLooper::Builder looperBuilder;
SkLayerDrawLooper::LayerInfo layerInfo;
// Add the back layer, with the defaults.
(void)looperBuilder.addLayerOnTop(layerInfo);
// Add the front layer, with some layer info set.
layerInfo.fOffset.set(10.0f, 20.0f);
layerInfo.fPaintBits |= SkLayerDrawLooper::kXfermode_Bit;
SkPaint* layerPaint = looperBuilder.addLayerOnTop(layerInfo);
layerPaint->setBlendMode(SkBlendMode::kSrc);
FakeDevice device;
SkCanvas canvas(sk_ref_sp(&device));
SkPaint paint;
auto looper(looperBuilder.detach());
SkArenaAlloc alloc{48};
SkDrawLooper::Context* context = looper->makeContext(&canvas, &alloc);
// The back layer should come first.
REPORTER_ASSERT(reporter, context->next(&canvas, &paint));
REPORTER_ASSERT(reporter, paint.getBlendMode() == SkBlendMode::kSrcOver);
canvas.drawRect(SkRect::MakeWH(50.0f, 50.0f), paint);
REPORTER_ASSERT(reporter, 0.0f == device.fLastMatrix.getTranslateX());
REPORTER_ASSERT(reporter, 0.0f == device.fLastMatrix.getTranslateY());
paint.reset();
// Then the front layer.
REPORTER_ASSERT(reporter, context->next(&canvas, &paint));
REPORTER_ASSERT(reporter, paint.getBlendMode() == SkBlendMode::kSrc);
canvas.drawRect(SkRect::MakeWH(50.0f, 50.0f), paint);
REPORTER_ASSERT(reporter, 10.0f == device.fLastMatrix.getTranslateX());
REPORTER_ASSERT(reporter, 20.0f == device.fLastMatrix.getTranslateY());
// Only two layers were added, so that should be the end.
REPORTER_ASSERT(reporter, !context->next(&canvas, &paint));
}
static void test_mixed(skiatest::Reporter* reporter) {
SkLayerDrawLooper::Builder looperBuilder;
SkLayerDrawLooper::LayerInfo layerInfo;
// Add the back layer, with the defaults.
(void)looperBuilder.addLayer(layerInfo);
// Add the front layer, with some layer info set.
layerInfo.fOffset.set(10.0f, 20.0f);
layerInfo.fPaintBits |= SkLayerDrawLooper::kXfermode_Bit;
SkPaint* layerPaint = looperBuilder.addLayerOnTop(layerInfo);
layerPaint->setBlendMode(SkBlendMode::kSrc);
FakeDevice device;
SkCanvas canvas(sk_ref_sp(&device));
SkPaint paint;
sk_sp<SkDrawLooper> looper(looperBuilder.detach());
SkArenaAlloc alloc{48};
SkDrawLooper::Context* context = looper->makeContext(&canvas, &alloc);
// The back layer should come first.
REPORTER_ASSERT(reporter, context->next(&canvas, &paint));
REPORTER_ASSERT(reporter, paint.getBlendMode() == SkBlendMode::kSrcOver);
canvas.drawRect(SkRect::MakeWH(50.0f, 50.0f), paint);
REPORTER_ASSERT(reporter, 0.0f == device.fLastMatrix.getTranslateX());
REPORTER_ASSERT(reporter, 0.0f == device.fLastMatrix.getTranslateY());
paint.reset();
// Then the front layer.
REPORTER_ASSERT(reporter, context->next(&canvas, &paint));
REPORTER_ASSERT(reporter, paint.getBlendMode() == SkBlendMode::kSrc);
canvas.drawRect(SkRect::MakeWH(50.0f, 50.0f), paint);
REPORTER_ASSERT(reporter, 10.0f == device.fLastMatrix.getTranslateX());
REPORTER_ASSERT(reporter, 20.0f == device.fLastMatrix.getTranslateY());
// Only two layers were added, so that should be the end.
REPORTER_ASSERT(reporter, !context->next(&canvas, &paint));
}
DEF_TEST(LayerDrawLooper, reporter) {
test_frontToBack(reporter);
test_backToFront(reporter);
test_mixed(reporter);
}
|
