glTexParameteri before glTexImage2D

OpenGL OpenGL: Basic Coding
1

Does glTexParameteri change the way glTexImage2D uploads an image?

Does glTexParameteri change the mode for all textures or only for the currently binded texture?

2

glTexParameter affects only the currently bound texture.

3

And does glTexParameteri change the way glTexImage2D uploads an image?

Because in code written by other people I always see something like this:

glBindTexture( GL_TEXTURE_2D, t );
glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST );
glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST );
glTexImage2D( GL_TEXTURE_2D, 0, 3, bitmap.getWidth(), bitmap.getHeight(), 0, GL_RGB, GL_UNSIGNED_BYTE, bitmap.getData() );

[This message has been edited by ARES (edited 10-13-2002).]

4

No, it does not affect the way the texture is upploaded, only the way it’s used.