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
|
/*
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package android.view;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.CanvasProperty;
import android.graphics.Paint;
import android.graphics.Rect;
/**
* Hardware accelerated canvas.
*
* @hide
*/
public abstract class HardwareCanvas extends Canvas {
@Override
public boolean isHardwareAccelerated() {
return true;
}
@Override
public void setBitmap(Bitmap bitmap) {
throw new UnsupportedOperationException();
}
/**
* Invoked before any drawing operation is performed in this canvas.
*
* @param dirty The dirty rectangle to update, can be null.
* @return {@link RenderNode#STATUS_DREW} if anything was drawn (such as a call to clear
* the canvas).
*
* @hide
*/
public abstract int onPreDraw(Rect dirty);
/**
* Invoked after all drawing operation have been performed.
*
* @hide
*/
public abstract void onPostDraw();
/**
* Draws the specified display list onto this canvas. The display list can only
* be drawn if {@link android.view.RenderNode#isValid()} returns true.
*
* @param displayList The display list to replay.
*/
public void drawDisplayList(RenderNode displayList) {
drawDisplayList(displayList, null, RenderNode.FLAG_CLIP_CHILDREN);
}
/**
* Draws the specified display list onto this canvas.
*
* @param displayList The display list to replay.
* @param dirty Ignored, can be null.
* @param flags Optional flags about drawing, see {@link RenderNode} for
* the possible flags.
*
* @return One of {@link RenderNode#STATUS_DONE} or {@link RenderNode#STATUS_DREW}
* if anything was drawn.
*
* @hide
*/
public abstract int drawDisplayList(RenderNode displayList, Rect dirty, int flags);
/**
* Draws the specified layer onto this canvas.
*
* @param layer The layer to composite on this canvas
* @param x The left coordinate of the layer
* @param y The top coordinate of the layer
* @param paint The paint used to draw the layer
*
* @hide
*/
abstract void drawHardwareLayer(HardwareLayer layer, float x, float y, Paint paint);
/**
* Calls the function specified with the drawGLFunction function pointer. This is
* functionality used by webkit for calling into their renderer from our display lists.
* This function may return true if an invalidation is needed after the call.
*
* @param drawGLFunction A native function pointer
*
* @return {@link RenderNode#STATUS_DONE}
*
* @hide
*/
public int callDrawGLFunction(long drawGLFunction) {
// Noop - this is done in the display list recorder subclass
return RenderNode.STATUS_DONE;
}
/**
* Indicates that the specified layer must be updated as soon as possible.
*
* @param layer The layer to update
*
* @see #clearLayerUpdates()
*
* @hide
*/
abstract void pushLayerUpdate(HardwareLayer layer);
/**
* Cancels a queued layer update. If the specified layer was not
* queued for update, this method has no effect.
*
* @param layer The layer whose update to cancel
*
* @see #pushLayerUpdate(HardwareLayer)
* @see #clearLayerUpdates()
*
* @hide
*/
abstract void cancelLayerUpdate(HardwareLayer layer);
/**
* Immediately executes all enqueued layer updates.
*
* @see #pushLayerUpdate(HardwareLayer)
*
* @hide
*/
abstract void flushLayerUpdates();
/**
* Removes all enqueued layer updates.
*
* @see #pushLayerUpdate(HardwareLayer)
*
* @hide
*/
abstract void clearLayerUpdates();
public abstract void drawCircle(CanvasProperty<Float> cx, CanvasProperty<Float> cy,
CanvasProperty<Float> radius, CanvasProperty<Paint> paint);
}
|
