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authorLaurent Pinchart <laurent.pinchart@ideasonboard.com>2022-08-07 20:39:19 +0300
committerLaurent Pinchart <laurent.pinchart@ideasonboard.com>2022-08-09 02:31:12 +0300
commit293e23e21cea5c1eb46df3938ac8b107e43b0c2b (patch)
tree64feef166ad98e3bc424b61bfa2647666c065d64 /src/v4l2/v4l2_camera_file.cpp
parent96a5c699700492750183c925339a69da7e2c2326 (diff)
cam: kms_sink: Scale the frame buffer to full screen if supported
The KMS sink currently displays the frame buffer on the top-left corner of the screen, resulting in either a black area on the bottom and right sides (if the frame buffer is smaller than the display resolution) of in a restricted field of view (if the frame buffer is larger than the display resolution). Improve this by scaling the frame buffer to full screen if supported, and aligning the crop rectangle to the frame buffer center if the field of view needs to be restricted. The implementation test for possible composition options, from best to worst. The tests are performed when the camera is started, as testing atomic commits requires access to frame buffer objects, which are not available at configure time. Changing this would require either a large refactoring of the cam application to provide frame buffers earlier, or extending the KMS API to support testing commits with dummy buffer objects. Both are candidates for later development. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Eric Curtin <ecurtin@redhat.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Tested-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Diffstat (limited to 'src/v4l2/v4l2_camera_file.cpp')
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