id = 962
title = "Screenshot images are skewed"
state = "opened"
created_at = "2022-04-04T16:01:30.121Z"
closed_at = "n/a"
labels = []
url = "https://gitlab.com/qemu-project/qemu/-/issues/962"
host-os = "Debian Bullseye"
host-arch = "x86_64"
qemu-version = "tested with 5.2 and 6.2"
guest-os = "Ubuntu 20.04 (and others)"
guest-arch = "x86_64"
description = """1. Start a guest with SPICE
2. Connect with a SPICE client
3. Resize screen to a width that is not a multiple of 4 (e. g. 487x956)
4. Take a screenshot

The screenshot ppm file will contain the actual dimensions in the header, e. g.
```
P6
487 956
255
```
but the image data will contain more than that (e. g. 488 * 956 * 3 bytes).
As a result, when displaying the image it appears skewed."""
reproduce = """See above."""
additional = """I'm not familiar with qemu code nor the pixman library, but I assume that in [this line](https://gitlab.com/qemu-project/qemu/-/blob/bc6ec396d471d9e4aae7e2ff8b72e11da9a97665/ui/console.c#L316) `get_stride` is wrong. Instead, it should write `width*3` bytes."""