Name

glBindTexture — bind a named texture to a texturing target

C Specification

void glBindTexture(GLenum target,
 GLuint texture);
 

Parameters

target

Specifies the target of the active texture unit to which the texture is bound. Must be either GL_TEXTURE_2D or GL_TEXTURE_CUBE_MAP.

texture

Specifies the name of a texture.

Description

glBindTexture lets you create or use a named texture. Calling glBindTexture with target set to GL_TEXTURE_2D or GL_TEXTURE_CUBE_MAP and texture set to the name of the new texture binds the texture name to the target of the current active texture unit. When a texture is bound to a target, the previous binding for that target is automatically broken.

Texture names are unsigned integers. The value zero is reserved to represent the default texture for each texture target. Texture names and the corresponding texture contents are local to the shared object space of the current GL rendering context.

You may use glGenTextures to generate a set of new texture names.

When a texture is first bound, it assumes the specified target: A texture first bound to GL_TEXTURE_2D becomes a two-dimensional texture and a texture first bound to GL_TEXTURE_CUBE_MAP becomes a cube-mapped texture. The state of a two-dimensional texture immediately after it is first bound is equivalent to the state of the default GL_TEXTURE_2D at GL initialization, and similarly for cube-mapped textures.

While a texture is bound, GL operations on the target to which it is bound affect the bound texture, and queries of the target to which it is bound return state from the bound texture. In effect, the texture targets become aliases for the textures currently bound to them, and the texture name zero refers to the default textures that were bound to them at initialization.

A texture binding created with glBindTexture remains active until a different texture is bound to the same target, or until the bound texture is deleted with glDeleteTextures.

Once created, a named texture may be re-bound to its same original target as often as needed. It is usually much faster to use glBindTexture to bind an existing named texture to one of the texture targets than it is to reload the texture image using glTexImage2D.

Errors

GL_INVALID_ENUM is generated if target is not one of the allowable values.

GL_INVALID_OPERATION is generated if texture was previously created with a target that doesn't match that of target.

Associated Gets

glGet with argument GL_TEXTURE_BINDING_2D or GL_TEXTURE_BINDING_CUBE_MAP

See Also

glDeleteTextures, glGenTextures, glGet, glGetTexParameter, glIsTexture, glTexImage2D, glTexParameter

Copyright

Copyright © 1991-2006 Silicon Graphics, Inc. This document is licensed under the SGI Free Software B License. For details, see http://oss.sgi.com/projects/FreeB/.