glBindTexture — bind a named texture to a texturing target
void glBindTexture( | GLenum target, |
GLuint texture) ; |
target
Specifies the target to which the texture is bound.
Must be one of
GL_TEXTURE_1D
,
GL_TEXTURE_2D
,
GL_TEXTURE_3D
,
GL_TEXTURE_1D_ARRAY
,
GL_TEXTURE_2D_ARRAY
,
GL_TEXTURE_RECTANGLE
,
GL_TEXTURE_CUBE_MAP
,
GL_TEXTURE_CUBE_MAP_ARRAY
,
GL_TEXTURE_BUFFER
,
GL_TEXTURE_2D_MULTISAMPLE
or
GL_TEXTURE_2D_MULTISAMPLE_ARRAY
.
texture
Specifies the name of a texture.
glBindTexture
lets you create or use a named texture. Calling glBindTexture
with
target
set to
GL_TEXTURE_1D
,
GL_TEXTURE_2D
,
GL_TEXTURE_3D
,
GL_TEXTURE_1D_ARRAY
,
GL_TEXTURE_2D_ARRAY
,
GL_TEXTURE_RECTANGLE
,
GL_TEXTURE_CUBE_MAP
,
GL_TEXTURE_CUBE_MAP_ARRAY
,
GL_TEXTURE_BUFFER
,
GL_TEXTURE_2D_MULTISAMPLE
or
GL_TEXTURE_2D_MULTISAMPLE_ARRAY
and texture
set to the name of the new texture 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 object space of the current GL rendering context; two rendering contexts share texture names only if they explicitly enable sharing between contexts through the appropriate GL windows interfaces functions.
You must 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_1D
becomes one-dimensional texture, a
texture first bound to GL_TEXTURE_2D
becomes two-dimensional texture, a
texture first bound to GL_TEXTURE_3D
becomes three-dimensional texture, a
texture first bound to GL_TEXTURE_1D_ARRAY
becomes one-dimensional array texture, a
texture first bound to GL_TEXTURE_2D_ARRAY
becomes two-dimensional arary texture, a
texture first bound to GL_TEXTURE_RECTANGLE
becomes rectangle texture, a
texture first bound to GL_TEXTURE_CUBE_MAP
becomes a cube-mapped texture, a
texture first bound to GL_TEXTURE_CUBE_MAP_ARRAY
becomes a cube-mapped array texture, a
texture first bound to GL_TEXTURE_BUFFER
becomes a buffer texture, a
texture first bound to GL_TEXTURE_2D_MULTISAMPLE
becomes a two-dimensional multisampled texture, and a
texture first bound to GL_TEXTURE_2D_MULTISAMPLE_ARRAY
becomes a two-dimensional multisampled array 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 the other texture types.
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 glTexImage1D, glTexImage2D,
glTexImage3D or another similar function.
The GL_TEXTURE_2D_MULTISAMPLE
and GL_TEXTURE_2D_MULTISAMPLE_ARRAY
targets are available
only if the GL version is 3.2 or higher.
GL_INVALID_ENUM
is generated if target
is not one of the allowable
values.
GL_INVALID_VALUE
is generated if target
is not a name returned from
a previous call to glGenTextures.
GL_INVALID_OPERATION
is generated if texture
was previously created with a target
that doesn't match that of target
.
glGet with argument GL_TEXTURE_BINDING_1D
,
GL_TEXTURE_BINDING_2D
, GL_TEXTURE_BINDING_3D
, GL_TEXTURE_BINDING_1D_ARRAY
,
GL_TEXTURE_BINDING_2D_ARRAY
, GL_TEXTURE_BINDING_RECTANGLE
,
GL_TEXTURE_BINDING_BUFFER
, GL_TEXTURE_BINDING_CUBE_MAP
, GL_TEXTURE_BINDING_CUBE_MAP
,
GL_TEXTURE_BINDING_CUBE_MAP_ARRAY
,
GL_TEXTURE_BINDING_2D_MULTISAMPLE
,
or GL_TEXTURE_BINDING_2D_MULTISAMPLE_ARRAY
.
glDeleteTextures, glGenTextures, glGet, glGetTexParameter, glIsTexture, glTexImage1D, glTexImage2D, glTexImage2DMultisample, glTexImage3D, glTexImage3DMultisample, glTexBuffer, glTexParameter
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/.