touch-packages team mailing list archive

[Thomas Voß <1407640@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

Right now, snapshot/preview generation relies on a call to
QGlFramebufferObject::toImage to obtain a QImage in
http://bazaar.launchpad.net/~phablet-team/qtvideo-
node/trunk/view/head:/src/snapshotgenerator.cpp#L118. Ultimately, this
results in a very expensive call to glReadPixels, blocking the buffer
processing of the camera app. Instead, we should avoid mapping the
pixels to main memory and just copy the texture.

** Affects: qtvideo-node (Ubuntu)
     Importance: High
     Assignee: Jim Hodapp (jhodapp)
         Status: New

** Changed in: qtvideo-node (Ubuntu)
   Importance: Undecided => High

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https://bugs.launchpad.net/bugs/1407640

Title:
  Preview generation should not rely on glReadPixels

Status in qtvideo-node package in Ubuntu:
  New

Bug description:
  Right now, snapshot/preview generation relies on a call to
  QGlFramebufferObject::toImage to obtain a QImage in
  http://bazaar.launchpad.net/~phablet-team/qtvideo-
  node/trunk/view/head:/src/snapshotgenerator.cpp#L118. Ultimately, this
  results in a very expensive call to glReadPixels, blocking the buffer
  processing of the camera app. Instead, we should avoid mapping the
  pixels to main memory and just copy the texture.

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