GLBINDTEXTURE(3G)GLBINDTEXTURE(3G)NAMEglBindTexture - bind a named texture to a texturing target
C SPECIFICATION
void glBindTexture( GLenum target,
GLuint texture )
PARAMETERS
target Specifies the target to which the texture is bound. Must be
either GL_TEXTURE_1D, GL_TEXTURE_2D, or GL_TEXTURE_3D.
texture
Specifies the name of a texture.
DESCRIPTIONglBindTexture lets you create or use a named texture. Calling
glBindTexture with
target set to GL_TEXTURE_1D, GL_TEXTURE_2D, GL_TEXTURE_3D and texture
set to the name of the newtexture binds the texture name to the target.
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
display-list space (see glXCreateContext) of the current GL rendering
context; two rendering contexts share texture names only if they also
share display lists.
You may use glGenTextures to generate a set of new texture names.
When a texture is first bound, it assumes the dimensionality of its
target: A texture first bound to GL_TEXTURE_1D becomes
one-dimensional, and a texture first bound to GL_TEXTURE_2D becomes
two-dimensional, and a texture first bound to GL_TEXTURE_3D becomes a
three-dimensional texture. The state of a one-dimensional texture
immediately after it is first bound is equivalent to the state of the
default GL_TEXTURE_1D at GL initialization, and similarly for two-, and
three-dimensional 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. If texture mapping of the
dimensionality of the target to which a texture is bound is active, the
bound texture is used. 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 the target of the
matching dimensionality 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
glTexImage1D, glTexImage2D, or glTexImage3D. For additional control
over performance, use glPrioritizeTextures.
glBindTexture is included in display lists.
NOTESglBindTexture is available only if the GL version is 1.1 or greater.
ERRORS
GL_INVALID_ENUM is generated if target is not one of the allowable
values.
GL_INVALID_OPERATION is generated if texture has a dimensionality that
doesn't match that of target.
GL_INVALID_OPERATION is generated if glBindTexture is executed between
the execution of glBegin and the corresponding execution of glEnd.
ASSOCIATED GETS
glGet with argument GL_TEXTURE_BINDING_1D
glGet with argument GL_TEXTURE_BINDING_2D
glGet with argument GL_TEXTURE_BINDING_3D
SEE ALSOglAreTexturesResident(3G), glDeleteTextures(3G), glGenTextures(3G),
glGet(3G),
glGetTexParameter(3G), glIsTexture(3G), glPrioritizeTextures(3G),
glTexImage1D(3G), glTexImage2D(3G), glTexParameter(3G)
March 1, 2011
