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Gert Wollny c9d99b7eec virgl: Fix texture transfers by using a staging resource
This commit fixes the following flaws in the implementation:

* when a resource was re-allocated, the guest side storage
  was also allocated
* when a source needs a readback before being written to, then
  the call would go through vws->transfer_get, thereby bypassing the
  staging resource, and this would fail on the host, because no
  the allocated IOV was too small (just one byte)
* if the texture write would need neither flush nor readback, the
  old code path would be used expecting that guest side backing stogage
  for the texture.

v2: - actually do a readback to the stageing resource when it is required
    - fix typo (Lepton)

v3: Don't use stageing transfers if the host can't read back the data
    by rendering to an FBO or calling getTexImage, because in this case
    we rely on the IOV to hold the date.

v4: Also don't use staging transfers if the format is no readback
    format. Otherwise we have to deal with the resolve blit, and
    this is currently not working correctly.

v5: add a new flag that indicates whether non-renderable textures can
    be read back (either via glGetTexImage or GBM)

v6: Restrict the use of staging texture transfers to textures that can
    be read back, and on GLES also if the they are bound to scanout and
    the host uses minigbm to allocate such textures.
    For that replace the flag indicating the capability to read back
    non-renderable textures with a cap that indicates whether scanout
    textures can be read back.

v7: update virglrenderer version in the CI

v8: update use of stageing (Chia-I)

v9: remove superflous check and assignment (Chia-I)

v10: disable stageing textures for arrays with stencil format. This is a
     workaround for failures of the CI.

Fixes: cdc480585c
    virgl/drm: New optimization for uploading textures

Signed-off-by: Gert Wollny <gert.wollny@collabora.com>
Reviewed-by: Chia-I Wu <olvaffe@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/14495>
2022-03-08 23:39:27 +01:00
.gitlab/issue_templates issue_templates/Bug Report: Rename master branch to main 2021-05-05 12:20:11 -07:00
.gitlab-ci virgl: Fix texture transfers by using a staging resource 2022-03-08 23:39:27 +01:00
android gallium/swr: Remove common code and build options 2021-12-06 23:37:50 +00:00
bin bin/gen_calendar_entries: fix newlines on windows 2022-01-16 08:39:44 +00:00
build-support configure: commit test files 2017-10-16 16:32:43 -07:00
docs docs: match build-flags markup with meson docs 2022-03-02 14:36:42 +00:00
include freedreno: Update uapi header 2022-03-04 16:05:10 -08:00
src virgl: Fix texture transfers by using a staging resource 2022-03-08 23:39:27 +01:00
subprojects meson: Update libelf wrap for Windows 2021-11-12 09:46:10 +00:00
.dir-locals.el dir-locals.el: Adds White Space support 2016-11-14 19:17:49 +02:00
.editorconfig editorconfig: Use 3-space tabs for .rst 2021-06-22 17:37:55 +00:00
.gitattributes Add new rules to .gitattributes 2022-01-19 15:17:17 +00:00
.gitignore intel/tools: Add unit tests for assembler 2019-05-07 14:33:48 -07:00
.gitlab-ci.yml ci, valve: Add the dEQP runners for Valve CI 2022-03-01 13:04:14 +00:00
.mailmap .mailmap: Switch Jason Ekstrand to @collabora.com 2022-01-26 20:08:31 +00:00
.travis.yml travis: Download XQuartz from GitHub. 2021-05-29 10:25:16 +00:00
CODEOWNERS CODEOWNERS: remove ownership of deleted code 2021-12-07 22:54:27 +00:00
meson.build meson: bump libdrm_amdgpu version to 2.4.110 2022-02-21 11:16:11 +00:00
meson_options.txt ci: Use a dlclose-disabling preload library for leak checking in Vulkan. 2022-01-27 23:47:46 +00:00
README.rst docs: promote #dri-devel on oftc over freenode 2021-05-24 09:21:48 +00:00
VERSION VERSION: bump version for 22.0 release 2022-02-02 22:49:09 +00:00

`Mesa <https://mesa3d.org>`_ - The 3D Graphics Library
======================================================


Source
------

This repository lives at https://gitlab.freedesktop.org/mesa/mesa.
Other repositories are likely forks, and code found there is not supported.


Build & install
---------------

You can find more information in our documentation (`docs/install.rst
<https://mesa3d.org/install.html>`_), but the recommended way is to use
Meson (`docs/meson.rst <https://mesa3d.org/meson.html>`_):

.. code-block:: sh

  $ mkdir build
  $ cd build
  $ meson ..
  $ sudo ninja install


Support
-------

Many Mesa devs hang on IRC; if you're not sure which channel is
appropriate, you should ask your question on `OFTC's #dri-devel
<irc://irc.oftc.net/dri-devel>`_, someone will redirect you if
necessary.
Remember that not everyone is in the same timezone as you, so it might
take a while before someone qualified sees your question.
To figure out who you're talking to, or which nick to ping for your
question, check out `Who's Who on IRC
<https://dri.freedesktop.org/wiki/WhosWho/>`_.

The next best option is to ask your question in an email to the
mailing lists: `mesa-dev\@lists.freedesktop.org
<https://lists.freedesktop.org/mailman/listinfo/mesa-dev>`_


Bug reports
-----------

If you think something isn't working properly, please file a bug report
(`docs/bugs.rst <https://mesa3d.org/bugs.html>`_).


Contributing
------------

Contributions are welcome, and step-by-step instructions can be found in our
documentation (`docs/submittingpatches.rst
<https://mesa3d.org/submittingpatches.html>`_).

Note that Mesa uses gitlab for patches submission, review and discussions.