uv question i want to set by pixels not by float coord

OpenGL OpenGL: Basic Coding
1

is there any function in opengl to set the uvs by PIXEL numbers and not by floats or integers? i mean the integers equals a pixel or what?? i have an image with 4 images say this image is 256x256 and there are 4 images inside that one how can i set the uvs if i know the size of each image ?? that wy i want a pixel function and not to set some floats or stuff like that 'cos its harder that way

with pxiels itis easi

2

Specify coordinates that map some numbers to pixels.

Texgen in eyespace can also be useful especially with a projective matrix.

3

your tech answer didnt help me srry
can u show me somethin practical?
btw thx!

4

Set a texture matrix that scales the coordinates by the reciprocal of the texture size.

glMatrixMode(GL_TEXTURE);
glScale(1.0/256.0, 1.0/256.0, 1.0);

Or simply do it by hand.

glTexCoord2f(x/256.0, y/256.0);

ARB_texture_rectangle textures also use non-normalized texture coordinates.