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Basic repaint test for squashed layers. The entire squashing layer should not need repainting when only a portion of it is invalidated. Test interactively by using --show-paint-rects and hovering over elements to change their color.
CASE 1, original layer tree:
{
"bounds": [800, 600],
"children": [
{
"bounds": [800, 600],
"contentsOpaque": true,
"drawsContent": true,
"children": [
{
"shouldFlattenTransform": false,
"children": [
{
"position": [60, 60],
"bounds": [100, 100],
"contentsOpaque": true,
"drawsContent": true,
"backgroundColor": "#808080"
},
{
"position": [140, 140],
"bounds": [260, 260],
"drawsContent": true
}
]
}
]
}
]
}
CASE 2, overlap1 changes color:
{
"bounds": [800, 600],
"children": [
{
"bounds": [800, 600],
"contentsOpaque": true,
"drawsContent": true,
"children": [
{
"shouldFlattenTransform": false,
"children": [
{
"position": [60, 60],
"bounds": [100, 100],
"contentsOpaque": true,
"drawsContent": true,
"backgroundColor": "#808080"
},
{
"position": [140, 140],
"bounds": [260, 260],
"drawsContent": true,
"repaintRects": [
[0, 0, 100, 100]
]
}
]
}
]
}
]
}
CASE 3, overlap1 and overlap2 change color:
{
"bounds": [800, 600],
"children": [
{
"bounds": [800, 600],
"contentsOpaque": true,
"drawsContent": true,
"children": [
{
"shouldFlattenTransform": false,
"children": [
{
"position": [60, 60],
"bounds": [100, 100],
"contentsOpaque": true,
"drawsContent": true,
"backgroundColor": "#808080"
},
{
"position": [140, 140],
"bounds": [260, 260],
"drawsContent": true,
"repaintRects": [
[80, 80, 100, 100],
[0, 0, 100, 100]
]
}
]
}
]
}
]
}
CASE 4, overlap2 and overlap3 change color:
{
"bounds": [800, 600],
"children": [
{
"bounds": [800, 600],
"contentsOpaque": true,
"drawsContent": true,
"children": [
{
"shouldFlattenTransform": false,
"children": [
{
"position": [60, 60],
"bounds": [100, 100],
"contentsOpaque": true,
"drawsContent": true,
"backgroundColor": "#808080"
},
{
"position": [140, 140],
"bounds": [260, 260],
"drawsContent": true,
"repaintRects": [
[160, 160, 100, 100],
[80, 80, 100, 100]
]
}
]
}
]
}
]
}
CASE 5, overlap3 and overlap1 change color:
{
"bounds": [800, 600],
"children": [
{
"bounds": [800, 600],
"contentsOpaque": true,
"drawsContent": true,
"children": [
{
"shouldFlattenTransform": false,
"children": [
{
"position": [60, 60],
"bounds": [100, 100],
"contentsOpaque": true,
"drawsContent": true,
"backgroundColor": "#808080"
},
{
"position": [140, 140],
"bounds": [260, 260],
"drawsContent": true,
"repaintRects": [
[160, 160, 100, 100],
[0, 0, 100, 100]
]
}
]
}
]
}
]
}
|
