NAME¶
glBindTexture - 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,
GL_TEXTURE_3D, or GL_TEXTURE_1D_ARRAY,
GL_TEXTURE_2D_ARRAY, GL_TEXTURE_RECTANGLE,
GL_TEXTURE_CUBE_MAP, GL_TEXTURE_2D_MULTISAMPLE or
GL_TEXTURE_2D_MULTISAMPLE_ARRAY.
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_1D,
GL_TEXTURE_2D,
GL_TEXTURE_3D, or
GL_TEXTURE_1D_ARRAY,
GL_TEXTURE_2D_ARRAY,
GL_TEXTURE_RECTANGLE,
GL_TEXTURE_CUBE_MAP,
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_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.
NOTES¶
The
GL_TEXTURE_2D_MULTISAMPLE and
GL_TEXTURE_2D_MULTISAMPLE_ARRAY
targets are available only if the GL version is 3.2 or higher.
ERRORS¶
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.
ASSOCIATED GETS¶
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_2D_MULTISAMPLE,
or
GL_TEXTURE_BINDING_2D_MULTISAMPLE_ARRAY.
SEE ALSO¶
glDeleteTextures(),
glGenTextures(),
glGet(),
glGetTexParameter(),
glIsTexture(),
glTexImage1D(),
glTexImage2D(),
glTexImage2DMultisample(),
glTexImage3D(),
glTexImage3DMultisample(),
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/.