On Tue, Mar 22, 2022 at 10:49:53AM +0000, Kshitij Suri wrote:
Currently screendump only supports PPM format, which is un-compressed and not
standard. Added a "format" parameter to qemu monitor screendump capabilites
to support PNG image capture using libpng. The param was added in QAPI schema
of screendump present in ui.json along with png_save() function which converts
pixman_image to PNG. HMP command equivalent was also modified to support the
feature.
Example usage:
{ "execute": "screendump", "arguments": { "filename": "/tmp/image",
"format":"png" } }
Resolves:
https://urldefense.proofpoint.com/v2/url?u=https-3A__gitlab.com_qemu-2Dproject_qemu_-2D_issues_718&d=DwIDaQ&c=s883GpUCOChKOHiocYtGcg&r=utjv19Ej9Fb0TB7_DX0o3faQ-OAm2ypPniPyqVSoj_w&m=SfkDKyBHSRlW9cvs1qhKamw8p2-qgFH_XQcMVSwM5IPIjGQm0Emsj496xu-fpwaw&s=4EZwj8JQje-qxGhg2-Vv81iA-atUQTCNNBnlk1AW7do&e=
Signed-off-by: Kshitij Suri <kshitij.suri@nutanix.com>
---
diff to v1:
- Removed repeated alpha conversion operation.
- Modified logic to mirror png conversion in vnc-enc-tight.c file.
- Added a new CONFIG_PNG parameter for libpng support.
- Changed input format to enum instead of string.
- Improved error handling.
hmp-commands.hx | 11 ++---
monitor/hmp-cmds.c | 12 +++++-
qapi/ui.json | 24 +++++++++--
ui/console.c | 101 +++++++++++++++++++++++++++++++++++++++++++--
4 files changed, 136 insertions(+), 12 deletions(-)
diff --git a/qapi/ui.json b/qapi/ui.json
index 664da9e462..e8060d6b3c 100644
--- a/qapi/ui.json
+++ b/qapi/ui.json
@@ -157,12 +157,27 @@
##
{ 'command': 'expire_password', 'boxed': true, 'data':
'ExpirePasswordOptions' }
+##
+# @ImageFormat:
+#
+# Supported image format types.
+#
+# @png: PNG format
+#
+# @ppm: PPM format
+#
+# Since: 7.0
This will probably end up being 7.1 at this point.
+#
+##
+{ 'enum': 'ImageFormat',
+ 'data': ['ppm', 'png'] }
+
##
# @screendump:
#
-# Write a PPM of the VGA screen to a file.
+# Capture the contents of a screen and write it to a file.
#
-# @filename: the path of a new PPM file to store the image
+# @filename: the path of a new file to store the image
#
# @device: ID of the display device that should be dumped. If this parameter
# is missing, the primary display will be used. (Since 2.12)
@@ -171,6 +186,8 @@
# parameter is missing, head #0 will be used. Also note that the head
# can only be specified in conjunction with the device ID. (Since 2.12)
#
+# @format: image format for screendump is specified. (default: ppm) (Since 7.0)
Likewise probably 7.1
None the less,
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
With regards,
Daniel