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https://issues.apache.org/jira/browse/GUACAMOLE-1918?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Mike Jumper updated GUACAMOLE-1918:
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Component/s: guacamole-server
> Multitouch attribute not correctly synced for guac_common_surface
> -----------------------------------------------------------------
>
> Key: GUACAMOLE-1918
> URL: https://issues.apache.org/jira/browse/GUACAMOLE-1918
> Project: Guacamole
> Issue Type: Bug
> Components: guacamole-server
> Reporter: Mike Jumper
> Priority: Minor
>
> The {{guac_common_surface_dup()}} function currently contains the following
> code for syncing the multitouch support attribute for a layer:
> {code:none}
> /* Synchronize layer-specific properties if applicable */
> if (surface->layer->index > 0) {
> /* Synchronize opacity */
> guac_protocol_send_shade(socket, surface->layer, surface->opacity);
> /* Synchronize location and hierarchy */
> guac_protocol_send_move(socket, surface->layer,
> surface->parent, surface->x, surface->y, surface->z);
> /* Synchronize multi-touch support level */
> guac_protocol_send_set_int(surface->socket, surface->layer,
> GUAC_PROTOCOL_LAYER_PARAMETER_MULTI_TOUCH,
> surface->touches);
> }
> {code}
> This is incorrect because:
> * The multitouch attribute applies only to the default layer (layer 0), but
> this {{if}} ensures that's exactly the only layer this function _won't_ send
> that attribute for.
> * The wrong {{guac_socket}} is referenced (it should be sent to the socket
> supplied to the {{guac_common_surface_dup()}} call, not the surface's socket.
> Depending on timing of any call to {{guac_common_surface_set_multitouch()}},
> this can result in multitouch support not having any effect.
> Instead, the multitouch attribute should be sent for only the default layer
> and to the correct socket.
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