Is there a way to blur texture from RenderSurface?

[DarekRuman]

Hi 

Is there a way to blur texture from RenderSurface before drawing on screen?

I'm rendering all stuff to rendersurface (size equal to size of game screen - 1:1)
Than in 2d rendering stuff - i'm drawing rendersurface.gettexture to screen and in next step i want to draw blended and blured rendersurface texture to get a fake-bloom effect

I know that there is a way to do in with another smaller rendersurface (render all stuff again in there) and than draw it stretched on screen (and we got something like blur) but i do lot of rendering billboards and it hit my FPS very very hard!! 

Is there a way to resize my rendersurface.gettexture and than render it stretched on screen? (to avoid another rendering to smaller rendersurface)

Thanks for any help!

[nateslunaXX]

hmmmm....render it to a billboard either away or close to the camera then render it last or shaders?

[DarekRuman]

hmmmm....render it to a billboard either away or close to the camera then render it last or shaders?

sorry ... can't understand your idea

[nateslunaXX]

well, i just thought that things get blurry when they are far away right?
so position it away from the camera, then it gets blurry but smaller.

it was just a thought..nevermind.
what about rendering the image 4 or more times to a rendersurface with a small difference in Xs and Ys with lower opacities? sorry not much of a help.

[DarekRuman]

Yeah i made it

init :
rendersurface1 - dimensions : your screen size.x , your screen size.y
rendersurface2 - dimensions : your screen size.x / 4 , your screen size.y / 4

1. Render all stuff (exept 2d) to rendersurface1

2. Render rendersurface1.gettex on rendersurface2 // now you've got some kind blurred screen of your 3d rendering

3. Next draw rendersurface1.gettex in 2d mode using DRAW_Texture, than change blending to multiply or smth and alpha draw (few time) rendersurface2.gettex by streching it to all screen :]

Finito

Greetz - back to work