firka/flutter
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Rename createsNewDisplayList to requiresCompositing

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This patch prepares for introducing the compositing system by repurposing the
relevant parts of the createsNewDisplayList system. This patch also removes the
no-longer-relevant parts of that system.
This commit is contained in:
Adam Barth 2015-08-13 12:43:39 -07:00
parent 45be4c6faf
commit be8454073a
1 changed files with 9 additions and 27 deletions
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36
packages/flutter/lib/rendering/object.dart
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@ -36,15 +36,10 @@ class PaintingContext {
PaintingContext(this.canvas);
List<RenderObject> _descendentsWithPaintingCanvases = new List<RenderObject>(); // used by RenderObject._updatePaintingCanvas() to find out which RenderObjects to ask to paint
void paintChild(RenderObject child, Point point) {
if (child.createNewDisplayList) {
assert(!_descendentsWithPaintingCanvases.contains(child));
_descendentsWithPaintingCanvases.add(child);
canvas.drawPaintingNode(child._paintingNode, point);
} else {
child._paintWithContext(this, point.toOffset());
}
// TODO(abarth): Support compositing.
assert(!child.requiresCompositing);
child._paintWithContext(this, point.toOffset());
}
}
@ -320,11 +315,6 @@ abstract class RenderObject extends AbstractNode implements HitTestTarget {
static List<RenderObject> _nodesNeedingPaint = new List<RenderObject>();
final sky.PaintingNode _paintingNode = new sky.PaintingNode();
sky.PaintingNode get paintingNode {
assert(createNewDisplayList);
return _paintingNode;
}
bool _needsPaint = true;
bool get needsPaint => _needsPaint;
@ -332,7 +322,7 @@ abstract class RenderObject extends AbstractNode implements HitTestTarget {
assert(!debugDoingPaint);
if (!attached) return; // Don't try painting things that aren't in the hierarchy
if (_needsPaint) return;
if (createNewDisplayList) {
if (requiresCompositing) {
_needsPaint = true;
_nodesNeedingPaint.add(this);
scheduler.ensureVisualUpdate();
@ -355,7 +345,7 @@ abstract class RenderObject extends AbstractNode implements HitTestTarget {
_nodesNeedingPaint = new List<RenderObject>();
for (RenderObject node in dirtyNodes..sort((a, b) => a.depth - b.depth)) {
if (node._needsPaint && node.attached)
node._updatePaintingCanvas();
node._repaint();
};
assert(_nodesNeedingPaint.length == 0);
} finally {
@ -364,9 +354,9 @@ abstract class RenderObject extends AbstractNode implements HitTestTarget {
}
}
void _updatePaintingCanvas() {
void _repaint() {
assert(!_needsLayout);
assert(createNewDisplayList);
assert(requiresCompositing);
sky.PictureRecorder recorder = new sky.PictureRecorder();
sky.Canvas canvas = new sky.Canvas(recorder, paintBounds);
PaintingContext context = new PaintingContext(canvas);
@ -374,21 +364,13 @@ abstract class RenderObject extends AbstractNode implements HitTestTarget {
try {
_paintWithContext(context, Offset.zero);
} catch (e) {
print('Exception raised during _updatePaintingCanvas:\n${e}\nContext:\n${this}');
print('Exception raised during _repaint:\n${e}\nContext:\n${this}');
if (inDebugBuild)
rethrow;
return;
}
assert(!_needsLayout); // check that the paint() method didn't mark us dirty again
assert(!_needsPaint); // check that the paint() method didn't mark us dirty again
_paintingNode.setBackingDrawable(recorder.endRecordingAsDrawable());
if (context._descendentsWithPaintingCanvases != null) {
for (RenderObject node in context._descendentsWithPaintingCanvases) {
assert(node.attached == attached);
if (node._needsPaint)
node._updatePaintingCanvas();
};
}
}
void _paintWithContext(PaintingContext context, Offset offset) {
@ -417,7 +399,7 @@ abstract class RenderObject extends AbstractNode implements HitTestTarget {
assert(!_needsPaint);
}
bool get createNewDisplayList => false;
bool get requiresCompositing => false;
Rect get paintBounds;
void debugPaint(PaintingContext context, Offset offset) { }
void paint(PaintingContext context, Offset offset) { }