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window: don't call output configure uninitialised 

Callbacks registered via display_set_output_configure_handler() are
promised to be called when we know the current mode for the output. If
the following order of events happens:
1. toytoolkit binds to a wl_output global
2. application registers an output configure handler
3. the wl_output.mode events are received

Then in step 2 we would call the callback with uninitialised output
informations, giving it a 0x0 size.

To avoid such race, do not call the callback from
display_set_output_configure_handler() if the output has 0x0 size.

The wl_output.mode event will be received later, and that will trigger
the right call to the callback.

Signed-off-by: Pekka Paalanen <ppaalanen@gmail.com>
This commit is contained in:
Pekka Paalanen 2012-10-15 12:06:53 +03:00 committed by Kristian Høgsberg
parent feb3c1d33b
commit b2f957a9f1
1 changed files with 6 additions and 1 deletions
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7
clients/window.c
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@ -3550,9 +3550,14 @@ display_set_output_configure_handler(struct display *display,
if (!handler)
return;
wl_list_for_each(output, &display->output_list, link)
wl_list_for_each(output, &display->output_list, link) {
if (output->allocation.width == 0 &&
output->allocation.height == 0)
continue;
(*display->output_configure_handler)(output,
display->user_data);
}
}
void