Re: [Qemu-devel] PATCH: fix bgr color mapping on qemu on Solaris/SPARC

[Dan Sandberg <dan.sandberg@medsci.uu.se>]

Paul Brook wrote:

>On Wednesday 10 May 2006 23:05, Fabrice Bellard wrote:
>  
>
>>In order to stop the release of incomplete BGR patches, I am
>>implementing a more complete patch. I am just adding depth = 32 with BGR
>>instead of RGB. If other pixel formats are wanted, you should signal it
>>now.
>>    
>>
>
>I don't have any paticular favourite pixel formats, but qemu now has [at 
>least] 3 different sets of low-level pixel conversion routines (vga, tcx and 
>pl110). If you're feeling really enthusiastic it would be nice if they could 
>be unified :-) 
>It's one of the things I've been meaning to look at when I've nothing better 
>to do, but haven't got round to yet..
>
>Paul
>
>
>
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>  
>
Just curious...

Are you using an OpenGL directdraw surface for the graphics emulation in 
Qemu?
If not, then consider the benefits:
1. It is much faster than any native graphics 2D/3D primitives like 
Windows GDI
2: It gives full control over things like window or fullscreen mode in 
any (almost) resolution and color depth.
3. It is operating system independent.
4. It handles things like RGB, BGR, 24bit, 15bit, 16bit, 8bit, alpha 
channel etc in hardware, all you have to do is select the pixelformat 
you like to use for the buffer and OpenGL does the rest - lightning 
fast, minimum CPU-load.

My suggestion would be to write a frontend similar to VMware's for Qemu 
in Lazarus. Why Lazarus?
1. The fantastic GLscene is available for Lazarus making 
OpenGL-programming easy. Try: http://www.skinhat.com/3dpack/
2. With Lazarus a RAD graphic frontend based on OpenGL can be made and 
directly compileable for most operating systems without need for 
modifications.

Hope someone likes the idea, otherwise I will have to do it myself if I 
can find some spare time.

Dan