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From: Gerd Hoffmann <kraxel@redhat.com>
To: Akihiko Odaki <akihiko.odaki@gmail.com>
Cc: Peter Maydell <peter.maydell@linaro.org>, qemu-devel@nongnu.org
Subject: Re: [PATCH v2] ui/cocoa: Fix stride resolution of pixman image
Date: Wed, 24 Feb 2021 12:23:07 +0100	[thread overview]
Message-ID: <20210224112307.vfz3qz6bgrboj627@sirius.home.kraxel.org> (raw)
In-Reply-To: <20210222144012.21486-1-akihiko.odaki@gmail.com>

On Mon, Feb 22, 2021 at 11:40:12PM +0900, Akihiko Odaki wrote:
> A display can receive an image which its stride is greater than its
> width. In fact, when a guest requests virtio-gpu to scan out a
> smaller part of an image, virtio-gpu passes it to a display as an
> image which its width represents the one of the part and its stride
> equals to the one of the whole image.

Probably not limited to virtio-gpu.  Wayland rounds display framebuffers
to the next multiple of 64, so when running -- for example -- 800x600
wayland will create an image 832 pixels wide.  Other UIs had simliar
issues.

Patch added to UI patch queue.

thanks,
  Gerd



  reply	other threads:[~2021-02-24 11:24 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-02-21 17:30 [PATCH] ui/cocoa: Fix stride resolution of pixman image Akihiko Odaki
2021-02-21 19:35 ` Peter Maydell
2021-02-22 14:40   ` [PATCH v2] " Akihiko Odaki
2021-02-24 11:23     ` Gerd Hoffmann [this message]
2021-02-24 13:08       ` Peter Maydell
2021-02-25  8:01         ` Gerd Hoffmann
2021-02-25  8:38           ` Akihiko Odaki

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