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engine
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fc558146
E
engine
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体验新版 GitCode,发现更多精彩内容 >>
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fc558146
编写于
11月 19, 2020
作者:
H
Harry Terkelsen
提交者:
GitHub
11月 19, 2020
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电子邮件补丁
差异文件
Implement Scene.toImage() in CanvasKit mode. (#22085)
上级
53fc019a
变更
3
隐藏空白更改
内联
并排
Showing
3 changed file
with
77 addition
and
1 deletion
+77
-1
lib/web_ui/lib/src/engine/canvaskit/layer_scene_builder.dart
lib/web_ui/lib/src/engine/canvaskit/layer_scene_builder.dart
+2
-1
lib/web_ui/lib/src/engine/canvaskit/layer_tree.dart
lib/web_ui/lib/src/engine/canvaskit/layer_tree.dart
+21
-0
lib/web_ui/test/canvaskit/scene_test.dart
lib/web_ui/test/canvaskit/scene_test.dart
+54
-0
未找到文件。
lib/web_ui/lib/src/engine/canvaskit/layer_scene_builder.dart
浏览文件 @
fc558146
...
...
@@ -17,7 +17,8 @@ class LayerScene implements ui.Scene {
@override
Future
<
ui
.
Image
>
toImage
(
int
width
,
int
height
)
{
throw
UnsupportedError
(
'LayerScene.toImage not implemented.'
);
ui
.
Picture
picture
=
layerTree
.
flatten
();
return
picture
.
toImage
(
width
,
height
);
}
}
...
...
lib/web_ui/lib/src/engine/canvaskit/layer_tree.dart
浏览文件 @
fc558146
...
...
@@ -52,6 +52,27 @@ class LayerTree {
rootLayer
!.
paint
(
context
);
}
}
/// Flattens the tree into a single [ui.Picture].
///
/// This picture does not contain any platform views.
ui
.
Picture
flatten
()
{
CkPictureRecorder
recorder
=
CkPictureRecorder
();
CkCanvas
canvas
=
recorder
.
beginRecording
(
ui
.
Rect
.
largest
);
if
(
rootLayer
!=
null
)
{
final
PrerollContext
prerollContext
=
PrerollContext
(
null
,
null
);
rootLayer
!.
preroll
(
prerollContext
,
Matrix4
.
identity
());
CkNWayCanvas
internalNodesCanvas
=
CkNWayCanvas
();
internalNodesCanvas
.
addCanvas
(
canvas
);
final
PaintContext
paintContext
=
PaintContext
(
internalNodesCanvas
,
canvas
,
null
,
null
);
if
(
rootLayer
!.
needsPainting
)
{
rootLayer
!.
paint
(
paintContext
);
}
}
return
recorder
.
endRecording
();
}
}
/// A single frame to be rendered.
...
...
lib/web_ui/test/canvaskit/scene_test.dart
0 → 100644
浏览文件 @
fc558146
// Copyright 2013 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// @dart = 2.6
import
'package:test/bootstrap/browser.dart'
;
import
'package:test/test.dart'
;
import
'package:ui/src/engine.dart'
;
import
'package:ui/ui.dart'
as
ui
;
import
'common.dart'
;
void
main
(
)
{
internalBootstrapBrowserTest
(()
=>
testMain
);
}
void
testMain
(
)
{
group
(
'LayerScene'
,
()
{
setUpAll
(()
async
{
await
ui
.
webOnlyInitializePlatform
();
});
test
(
'toImage returns an image'
,
()
async
{
final
ui
.
PictureRecorder
recorder
=
ui
.
PictureRecorder
();
expect
(
recorder
,
isA
<
CkPictureRecorder
>());
final
ui
.
Canvas
canvas
=
ui
.
Canvas
(
recorder
);
expect
(
canvas
,
isA
<
CanvasKitCanvas
>());
final
ui
.
Paint
paint
=
ui
.
Paint
();
expect
(
paint
,
isA
<
CkPaint
>());
paint
.
color
=
ui
.
Color
.
fromARGB
(
255
,
255
,
0
,
0
);
// Draw a red circle.
canvas
.
drawCircle
(
ui
.
Offset
(
20
,
20
),
10
,
paint
);
final
ui
.
Picture
picture
=
recorder
.
endRecording
();
expect
(
picture
,
isA
<
CkPicture
>());
final
ui
.
SceneBuilder
builder
=
ui
.
SceneBuilder
();
expect
(
builder
,
isA
<
LayerSceneBuilder
>());
builder
.
pushOffset
(
0
,
0
);
builder
.
addPicture
(
ui
.
Offset
(
0
,
0
),
picture
);
final
ui
.
Scene
scene
=
builder
.
build
();
final
ui
.
Image
sceneImage
=
await
scene
.
toImage
(
100
,
100
);
expect
(
sceneImage
,
isA
<
CkImage
>());
});
// TODO: https://github.com/flutter/flutter/issues/60040
},
skip:
isIosSafari
);
}
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