Messages

1

Graphics / Re: read backbuffer?

« on: March 17, 2014, 10:31:59 am »

Hi, thanks for your quick reply and for pointing me in the right direction.

Actually it's for video, so speed is important. From DirectX I know that getting data to/form the GPU is (relatively) slow, but there the advantages outweigh the disadvantages. Unless you know from experience, I'll write a little test to see how much ms this takes in OpenGL/SFML. I also need to find out if there is a bottleneck somewhere, i.e. what happens if multiple threads start uploading to/from the GPU.

2

Graphics / read backbuffer?

« on: March 17, 2014, 09:43:53 am »

Hi,

Can I use SFML as a hardware accelerator for bitmap processing, i.e. create an invisible surface, scale and write some bitmaps to it, and read back the result? I googled for it, searched this forum (which keeps giving me database errors) and even bought the SFML Game Development book, but am still unsure if this is even possible. I currently use GDI for this purpose, but it's too slow.

Thanks.