Multithreaded resource loading

[WILL]

Hey is this a Windows demo? If you provide me with a Snow Leopard compatible demo I'd gladly run it on my, almost newest, iMac (has an Intel Core i7 with a ATI Radeon HD 4850) for you.

[Andru]

Hey is this a Windows demo? If you provide me with a Snow Leopard compatible demo I'd gladly run it on my, almost newest, iMac (has an Intel Core i7 with a ATI Radeon HD 4850) for you.

Oh, it will be interesting to test it on real Mac Tonight I will build a Mac demo.

[User137]

Are you doing this with Lazarus? It has lazOpenGLContext package which works same time on most operating systems.

[Andru]

Are you doing this with Lazarus? It has lazOpenGLContext package which works same time on most operating systems.

Nope, I use my own code(that can be compiled by FreePascal and Delphi(7-2010, Win32 only)). Maybe some time later I will present my library with examples here

[Luuk van Venrooij]

Cool stuff! programs seems to work ok here. I experimented with this a while back see we use the same approach. You can not only load textures this way but also geometry into VBO/DPL, load and compile shader programs or any other OpenGL resource for that matter.

To bad that this approach requires a context switch I made a small grid bassed world system that would automaticly stream in new models/textures when needed but the switching of contexts gave me pretty large framedrops. Hope that OGL 4.X wil have a solution for this like DX10 and DX11.

[Andru]

To bad that this approach requires a context switch

I switch context only one time - for creating second context. After that all threads working without switching and waiting

[Andru]

WILL
Here the MacOS X version of demo compiled under MacOS X 10.6.3

[Luuk van Venrooij]

I switch context only one time - for creating second context. After that all threads working without switching and waiting

You need to switch the context. Otherwise your rendering commands will be send to the wrong threads if you want to handle drawing onscreen.