cc/layer_tree_host_common.cc - Issue 12224113: [cc] Apply sublayer transform about anchor instead of about layer center.

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Unified Diff: cc/layer_tree_host_common.cc

Issue 12224113: [cc] Apply sublayer transform about anchor instead of about layer center. (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src

Patch Set: Created 7 years, 10 months ago

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Index: cc/layer_tree_host_common.cc

diff --git a/cc/layer_tree_host_common.cc b/cc/layer_tree_host_common.cc

index e316c370fad9a7c6f3423e0b97c60f7764cd2398..4606dff975fa323c1b43e01bee7cc224fc7f136e 100644

--- a/cc/layer_tree_host_common.cc

+++ b/cc/layer_tree_host_common.cc

@@ -869,9 +869,9 @@ static void calculateDrawPropertiesInternal(LayerType* layer, const gfx::Transfo

// Apply the sublayer transform at the center of the layer.

danakj 2013/02/12 00:58:23 This comment is wrong now.

if (!layer->sublayerTransform().IsIdentity()) {

- sublayerMatrix.Translate(0.5 * bounds.width(), 0.5 * bounds.height());

+ sublayerMatrix.Translate(layer->anchorPoint().x() * bounds.width(), layer->anchorPoint().y() * bounds.height());

sublayerMatrix.PreconcatTransform(layer->sublayerTransform());

- sublayerMatrix.Translate(-0.5 * bounds.width(), -0.5 * bounds.height());

+ sublayerMatrix.Translate(-layer->anchorPoint().x() * bounds.width(), -layer->anchorPoint().y() * bounds.height());

}

LayerList& descendants = (layer->renderSurface() ? layer->renderSurface()->layerList() : layerList);

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