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1 /* | 1 /* |
2 * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights
reserved. | 2 * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights
reserved. |
3 * | 3 * |
4 * Portions are Copyright (C) 1998 Netscape Communications Corporation. | 4 * Portions are Copyright (C) 1998 Netscape Communications Corporation. |
5 * | 5 * |
6 * Other contributors: | 6 * Other contributors: |
7 * Robert O'Callahan <roc+@cs.cmu.edu> | 7 * Robert O'Callahan <roc+@cs.cmu.edu> |
8 * David Baron <dbaron@fas.harvard.edu> | 8 * David Baron <dbaron@fas.harvard.edu> |
9 * Christian Biesinger <cbiesinger@web.de> | 9 * Christian Biesinger <cbiesinger@web.de> |
10 * Randall Jesup <rjesup@wgate.com> | 10 * Randall Jesup <rjesup@wgate.com> |
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2829 double localZOffset = -numeric_limits<double>::infinity(); | 2829 double localZOffset = -numeric_limits<double>::infinity(); |
2830 double* zOffsetForDescendantsPtr = 0; | 2830 double* zOffsetForDescendantsPtr = 0; |
2831 double* zOffsetForContentsPtr = 0; | 2831 double* zOffsetForContentsPtr = 0; |
2832 | 2832 |
2833 bool depthSortDescendants = false; | 2833 bool depthSortDescendants = false; |
2834 if (preserves3D()) { | 2834 if (preserves3D()) { |
2835 depthSortDescendants = true; | 2835 depthSortDescendants = true; |
2836 // Our layers can depth-test with our container, so share the z depth po
inter with the container, if it passed one down. | 2836 // Our layers can depth-test with our container, so share the z depth po
inter with the container, if it passed one down. |
2837 zOffsetForDescendantsPtr = zOffset ? zOffset : &localZOffset; | 2837 zOffsetForDescendantsPtr = zOffset ? zOffset : &localZOffset; |
2838 zOffsetForContentsPtr = zOffset ? zOffset : &localZOffset; | 2838 zOffsetForContentsPtr = zOffset ? zOffset : &localZOffset; |
2839 } else if (m_has3DTransformedDescendant) { | |
2840 // Flattening layer with 3d children; use a local zOffset pointer to dep
th-test children and foreground. | |
2841 depthSortDescendants = true; | |
2842 zOffsetForDescendantsPtr = zOffset ? zOffset : &localZOffset; | |
2843 zOffsetForContentsPtr = zOffset ? zOffset : &localZOffset; | |
2844 } else if (zOffset) { | 2839 } else if (zOffset) { |
2845 zOffsetForDescendantsPtr = 0; | 2840 zOffsetForDescendantsPtr = 0; |
2846 // Container needs us to give back a z offset for the hit layer. | 2841 // Container needs us to give back a z offset for the hit layer. |
2847 zOffsetForContentsPtr = zOffset; | 2842 zOffsetForContentsPtr = zOffset; |
2848 } | 2843 } |
2849 | 2844 |
2850 // This variable tracks which layer the mouse ends up being inside. | 2845 // This variable tracks which layer the mouse ends up being inside. |
2851 RenderLayer* candidateLayer = 0; | 2846 RenderLayer* candidateLayer = 0; |
2852 | 2847 |
2853 // Begin by walking our list of positive layers from highest z-index down to
the lowest z-index. | 2848 // Begin by walking our list of positive layers from highest z-index down to
the lowest z-index. |
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4134 } | 4129 } |
4135 } | 4130 } |
4136 | 4131 |
4137 void showLayerTree(const WebCore::RenderObject* renderer) | 4132 void showLayerTree(const WebCore::RenderObject* renderer) |
4138 { | 4133 { |
4139 if (!renderer) | 4134 if (!renderer) |
4140 return; | 4135 return; |
4141 showLayerTree(renderer->enclosingLayer()); | 4136 showLayerTree(renderer->enclosingLayer()); |
4142 } | 4137 } |
4143 #endif | 4138 #endif |
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