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Bug 1249604 - Don't use gtk_drag_set_icon_surface on GTK versions that use X SHAPE for dnd with cairo. r=karlt

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MozReview-Commit-ID: 2XxnJfvfOXl
This commit is contained in:
Andrew Comminos 2016-02-19 17:33:54 -08:00
parent f0aa4e91e0
commit 1a00418c26
1 changed files with 7 additions and 0 deletions
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7
widget/gtk/nsDragService.cpp
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@ -468,6 +468,13 @@ nsDragService::SetAlphaPixmap(SourceSurface *aSurface,
#ifdef cairo_image_surface_create
#error "Looks like we're including Mozilla's cairo instead of system cairo"
#endif
// Prior to GTK 3.9.12, cairo surfaces passed into gtk_drag_set_icon_surface
// had their shape information derived from the alpha channel and used with
// the X SHAPE extension instead of being displayed as an ARGB window.
// See bug 1249604.
if (gtk_check_version(3, 9, 12))
return false;
// TODO: grab X11 pixmap or image data instead of expensive readback.
cairo_surface_t *surf = cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
dragRect.width,