[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Qemu-devel] [PATCH 3/8] console: add qemu_alloc_display_format.

From: Frederic Konrad
Subject: Re: [Qemu-devel] [PATCH 3/8] console: add qemu_alloc_display_format.
Date: Mon, 18 May 2015 13:56:07 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.5.0

On 18/05/2015 13:17, Gerd Hoffmann wrote:
On Mo, 2015-05-18 at 09:51 +0200, Frederic Konrad wrote:
On 18/05/2015 09:34, Gerd Hoffmann wrote:
On Mi, 2015-05-13 at 21:12 +0200, address@hidden wrote:
From: KONRAD Frederic <address@hidden>

This allows to create a surface with a different format than xrgb8888.
What is the use case for this?



The Display Port introduced in patch 7 and the driver use differents
pixel format.
eg: rgb565, RGB888, etc. see xilinx_dp_change_graphic_fmt in patch 7:
Ah, and dpdma scatterlists (patch 6) suggest the guest framebuffer is
not contiguous in guest phyiscal memory, correct?  So using guest memory
as surface storage using qemu_create_displaysurface_from() doesn't work.
Exactly, the framebuffer is not necessarilly contiguous, so I need to put the
fragment into the pixman storage.

But I think you can simply call qemu_create_displaysurface_from() with
linesize=0 and data=NULL to make pixman allocate storage for you.
Ah, maybe! I'll check that.


reply via email to

[Prev in Thread] Current Thread [Next in Thread]