mipmaping a texture after being writen by FBO

Graphics and GPU Programming Programming OpenGL

Started by IYP June 30, 2015 07:26 PM

4 comments, last by IYP 8 years, 9 months ago

1,545

Author

June 30, 2015 07:26 PM

I've been trying to use VSM (variance shadow maps) and as you may know these shadow maps can use interpolation, and you get better results doing so.

so I've been trying to mip map the shadow maps so I can get average values of 4 texel, but I don't seem to find any OpenGL functions for generating mipmaps after the texture is written by FBO. any idea how it's done?

thanks in advance.

Blog: HG3D Graphics

AlexMekhed

702

June 30, 2015 10:03 PM

glGenerateMipmap?

IYP

1,545

Author

June 30, 2015 11:30 PM

well it doesn't seem to work

Blog: HG3D Graphics

Chris_F

3,030

July 01, 2015 01:54 AM

well it doesn't seem to work

I'm sorry to hear that.

L. Spiro

25,818

July 01, 2015 03:01 AM

Depth textures can’t be mipmapped.
Generate them by yourself via shaders and manual down-sampling.

L. Spiro

I restore Nintendo 64 video-game OST’s into HD! https://www.youtube.com/channel/UCCtX_wedtZ5BoyQBXEhnVZw/playlists?view=1&sort=lad&flow=grid

IYP

1,545

Author

July 01, 2015 05:32 AM

well I used normal textures, I forgot to use GL_LINEAR_MIPMAP_LINEAR instead of GL_LINEAR it works fine now.

thanks for the help

Blog: HG3D Graphics

mipmaping a texture after being writen by FBO

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mipmaping a texture after being writen by FBO

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