I want to rescale image...

[Dorae2]

Hi http://www.opengl.org/discussion_boards/ubb/smile.gif; I am high school student in Asia...

(So I can't speak English well)

I'm making small game for training.

But I have big trouble now...

I want to use 300 * 200 sized image to

texture.

Some people advised me to use 'gluScaleImage'

But if I use this function,I always get

strange image...

Can I use gluScaleImage to rescale 300*200

sized image to 256*256 sized image?

I need your help http://www.opengl.org/discussion_boards/ubb/frown.gif...

[marcus256]

I haven't tried your exact parameters, but it should be possible.

Are you using the correcte format and type settings?

format = GL_RGB (or GL_RGBA)
typeIn = GL_UNSIGNED_BYTE
typeOut = GL_UNSIGNED_BYTE

[Dorae2]

Maybe...

I use correct parameters... http://www.opengl.org/discussion_boards/ubb/frown.gif...

[marcus256]

Have you tried using gluBuild2DMipmaps?

It does the scaling automatically for you (the texture does not have to have a size that is a power of two).

[Gavin]

So what do you mean by 'strange' image?

[V-man]

Originally posted by marcus256:
I haven't tried your exact parameters, but it should be possible.

Are you using the correcte format and type settings?

format = GL_RGB (or GL_RGBA)
typeIn = GL_UNSIGNED_BYTE
typeOut = GL_UNSIGNED_BYTE


Also
glPixelStorei(GL_UNPACK_ALIGNMENT, ?);
glPixelStorei(GL_PACK_ALIGNMENT, ?);

V-man

[Dorae2]

Hmm...;

I got 'broken' image...;