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abdullh.alsoleman
Front-End
Commits
bc496459
Commit
bc496459
authored
Jul 28, 2015
by
Viktor Lidholt
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Optimizes sprite performance by reusing Paint objects
parent
0041182d
Changes
1
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1 changed file
with
6 additions
and
5 deletions
+6
-5
sprite.dart
packages/flutter/example/game/lib/sprite.dart
+6
-5
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packages/flutter/example/game/lib/sprite.dart
View file @
bc496459
...
...
@@ -29,6 +29,8 @@ class Sprite extends NodeWithSize {
/// mySprite.transferMode = TransferMode.plusMode;
TransferMode
transferMode
;
Paint
_cachedPaint
=
new
Paint
();
/// Creates a new sprite from the provided [texture].
///
/// var mySprite = new Sprite(myTexture)
...
...
@@ -94,17 +96,16 @@ class Sprite extends NodeWithSize {
canvas
.
scale
(
scaleX
,
scaleY
);
// Setup paint object for opacity and transfer mode
Paint
paint
=
new
Paint
();
paint
.
color
=
new
Color
.
fromARGB
((
255.0
*
_opacity
).
toInt
(),
255
,
255
,
255
);
_cachedPaint
.
color
=
new
Color
.
fromARGB
((
255.0
*
_opacity
).
toInt
(),
255
,
255
,
255
);
if
(
colorOverlay
!=
null
)
{
p
aint
.
setColorFilter
(
new
ColorFilter
.
mode
(
colorOverlay
,
TransferMode
.
srcATop
));
_cachedP
aint
.
setColorFilter
(
new
ColorFilter
.
mode
(
colorOverlay
,
TransferMode
.
srcATop
));
}
if
(
transferMode
!=
null
)
{
p
aint
.
setTransferMode
(
transferMode
);
_cachedP
aint
.
setTransferMode
(
transferMode
);
}
// Do actual drawing of the sprite
texture
.
drawTexture
(
canvas
,
Point
.
origin
,
p
aint
);
texture
.
drawTexture
(
canvas
,
Point
.
origin
,
_cachedP
aint
);
}
else
{
// Paint a red square for missing texture
canvas
.
drawRect
(
new
Rect
.
fromLTRB
(
0.0
,
0.0
,
size
.
width
,
size
.
height
),
...
...
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