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From: Akihiko Odaki <akihiko.odaki@gmail.com>
To: Gerd Hoffmann <kraxel@redhat.com>
Cc: qemu Developers <qemu-devel@nongnu.org>
Subject: Re: [PATCH] opengl: Do not convert format with glTexImage2D on OpenGL ES
Date: Sat, 20 Feb 2021 14:50:14 +0900	[thread overview]
Message-ID: <CAMVc7JV5Q-Ms=oy1-4897_u9haW2hZj67aA0UAfbkvbofzB1vg@mail.gmail.com> (raw)
In-Reply-To: <20210219141446.ne2mutkfa5pa2dhu@sirius.home.kraxel.org>

2021年2月19日(金) 23:14 Gerd Hoffmann <kraxel@redhat.com>:
>
> On Fri, Feb 19, 2021 at 06:48:03PM +0900, Akihiko Odaki wrote:
> > OpenGL ES does not support conversion from the given data format
> > to the internal format with glTexImage2D.
> >
> > Use the given data format as the internal format, and ignore
> > the given alpha channels with GL_TEXTURE_SWIZZLE_A in case the
> > format contains alpha channels.
>
> Hmm.  Do you know what effect this has performance-wise?
> Is it maybe useful to not convert for desktop gl too?

I have no idea about performance, but I am concerned about
compatibility. OpenGL 4.6 core profile does not support GL_BGRA, which
is aliased as GL_BGRA_EXT by epoxy, as internalformat. I also tested
with Intel HD Graphics 3000/Mesa 20.3.4 but it didn't work.

>
> take care,
>   Gerd
>


  reply	other threads:[~2021-02-20  5:51 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-02-19  9:48 [PATCH] opengl: Do not convert format with glTexImage2D on OpenGL ES Akihiko Odaki
2021-02-19 14:14 ` Gerd Hoffmann
2021-02-20  5:50   ` Akihiko Odaki [this message]
2021-03-11 12:51 ` Gerd Hoffmann

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