OpenGL saving textures

Graphics and GPU Programming Programming OpenGL

Started by okonomiyaki January 25, 2004 02:31 PM

4 comments, last by okonomiyaki 20 years, 2 months ago

548

Author

January 25, 2004 02:31 PM

Sorry to ask another newbie question, but I can''t find info on this anywhere. I''m still kind of used to DX''s SaveTextureToFile function. Is there any functionality in OpenGL that resembles this? I created a texture with noise and now I want to save it to a jpeg, or maybe bmp. I can imagine coding the saving to a bmp myself, but I was wondering if OpenGL has anything at all that will help me with this. Thanks!

Mulligan

378

January 25, 2004 02:53 PM

start with this

glCopyTexImage2D( GL_TEXTURE_2D, 0, GL_RGB, 0, 0, m_iTexSize, m_iTexSize, 0 );

and

glGetTexImage( GL_TEXTURE_2D, 0, GL_RGB, GL_UNSIGNED_BYTE, m_pTexBuffer );

it takes whatever texture is currently bound, and dumps the texture data (rgb for each pixel) into an array m_pTexBuffer in my case.

then you can look up different file formats and save this info any way you need.

[edited by - Mulligan on January 25, 2004 3:55:05 PM]

okonomiyaki

548

Author

January 25, 2004 03:11 PM

Well I already have the image data in an array because that''s what I fill first, and then I bind that data. So I guess I''ll just look up the image formats and how to save them.. thanks a lot though, it''s still good to know those functions

Anonymous

January 25, 2004 03:45 PM

quote:Original post by okonomiyaki
Well I already have the image data in an array because that''s what I fill first, and then I bind that data. So I guess I''ll just look up the image formats and how to save them.. thanks a lot though, it''s still good to know those functions

Or take a look at free image libraries like <A HREF="http://openil.sourceforge.net/">DevIL</A>.