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Re: [Qemu-devel] PATCH: fix bgr color mapping on qemu on Solaris/SPARC
From: |
Paul Brook |
Subject: |
Re: [Qemu-devel] PATCH: fix bgr color mapping on qemu on Solaris/SPARC |
Date: |
Fri, 12 May 2006 17:54:13 +0100 |
User-agent: |
KMail/1.9.1 |
> Anyway, many people think of OpenGL as just 3D, but it is extremely
> competent for 2D (given a good driver).
That's where your argument falls down.
I wouldn't be surprised if even a crappy OpenGL implementation could beat
plain GDI. However I'd guess most OpenGL drivers are optimised for common 3D
operations. OpenGL provides a very wide range of functionality, however if
you go outside the commonly used (and hence optimized) feature set
performance is likely to be fairly poor when compared if optimized routines.
> standard Windows GDI and 145 ms for the OpenGL 2D-canvas (and its just a
> standard business computer with no fancy graphic card at all).
If GDI was writing directly to video memory and OpenGL was writing to a buffer
in system memory that would explain the large difference.
I'm not saying OpenGL is necessarily a bad thing, but it's certainly not (yet)
what I'd consider good solution. Especially considering that 90% of modern
graphics cards don't have any open source OpenGL capable drivers.
Paul
- Re: [Qemu-devel] PATCH: fix bgr color mapping on qemu on Solaris/SPARC, (continued)
- Re: [Qemu-devel] PATCH: fix bgr color mapping on qemu on Solaris/SPARC, Oliver Gerlich, 2006/05/11
- Re: [Qemu-devel] PATCH: fix bgr color mapping on qemu on Solaris/SPARC, Anthony Liguori, 2006/05/11
- Re: [Qemu-devel] PATCH: fix bgr color mapping on qemu on Solaris/SPARC, Fabrice Bellard, 2006/05/11
- Re: [Qemu-devel] PATCH: fix bgr color mapping on qemu on Solaris/SPARC, Dan Sandberg, 2006/05/12
- Re: [Qemu-devel] PATCH: fix bgr color mapping on qemu on Solaris/SPARC, Jamie Lokier, 2006/05/12
- Re: [Qemu-devel] PATCH: fix bgr color mapping on qemu on Solaris/SPARC, Dan Sandberg, 2006/05/12
- Re: [Qemu-devel] PATCH: fix bgr color mapping on qemu on Solaris/SPARC, Jamie Lokier, 2006/05/12
- Re: [Qemu-devel] PATCH: fix bgr color mapping on qemu on Solaris/SPARC, Dan Sandberg, 2006/05/12
- Re: [Qemu-devel] PATCH: fix bgr color mapping on qemu on Solaris/SPARC,
Paul Brook <=
Re: [Qemu-devel] PATCH: fix bgr color mapping on qemu on Solaris/SPARC, Ben Taylor, 2006/05/10