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Posted to commits@guacamole.apache.org by "Michael Jumper (JIRA)" <ji...@apache.org> on 2017/01/28 00:41:24 UTC
[jira] [Created] (GUACAMOLE-187) Improve performance of
layer/surface resize
Michael Jumper created GUACAMOLE-187:
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Summary: Improve performance of layer/surface resize
Key: GUACAMOLE-187
URL: https://issues.apache.org/jira/browse/GUACAMOLE-187
Project: Guacamole
Issue Type: Improvement
Components: guacamole-common-js, guacamole-server
Reporter: Michael Jumper
Assignee: Michael Jumper
Resizing a layer is an expensive operation within the client, as it requires making a full copy of the contents of the canvas backing the layer. By the standard, the contents of the canvas tag must be cleared when the size is changed, thus the Guacamole client needs to save and restore the graphical state of the canvas prior to resizing.
Similarly, on the server, resizing a surface involves allocating enough space to hold the new image and copying the data over. For large surfaces, this can be expensive.
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