OpenGL extension EXT.texture_array
This module customises the behaviour of the
OpenGL.raw.GL.EXT.texture_array to provide a more
Overview (from the spec)
This extension introduces the notion of one- and two-dimensional array
textures. An array texture is a collection of one- and two-dimensional
images of identical size and format, arranged in layers. A
one-dimensional array texture is specified using TexImage2D; a
two-dimensional array texture is specified using TexImage3D. The height
(1D array) or depth (2D array) specify the number of layers in the image.
An array texture is accessed as a single unit in a programmable shader,
using a single coordinate vector. A single layer is selected, and that
layer is then accessed as though it were a one- or two-dimensional
texture. The layer used is specified using the "t" or "r" texture
coordinate for 1D and 2D array textures, respectively. The layer
coordinate is provided as an unnormalized floating-point value in the
range [0,<n>-1], where <n> is the number of layers in the array texture.
Texture lookups do not filter between layers, though such filtering can be
achieved using programmable shaders. When mipmapping is used, each level
of an array texture has the same number of layers as the base level; the
number of layers is not reduced as the image size decreases.
Array textures can be rendered to by binding them to a framebuffer object
(EXT_framebuffer_object). A single layer of an array texture can be bound
using normal framebuffer object mechanisms, or an entire array texture can
be bound and rendered to using the layered rendering mechanisms provided
This extension does not provide for the use of array textures with
fixed-function fragment processing. Such support could be added by
providing an additional extension allowing applications to pass the new
target enumerants (TEXTURE_1D_ARRAY_EXT and TEXTURE_2D_ARRAY_EXT) to
Enable and Disable.
The official definition of this extension is available here:
|EXTENSION_NAME = 'GL_EXT_texture_array'|
GL_COMPARE_REF_DEPTH_TO_TEXTURE_EXT = GL_COMPARE_REF_DEPTH_TO_TEXTURE_EXT
GL_MAX_ARRAY_TEXTURE_LAYERS_EXT = GL_MAX_ARRAY_TEXTURE_LAYERS_EXT
GL_PROXY_TEXTURE_1D_ARRAY_EXT = GL_PROXY_TEXTURE_1D_ARRAY_EXT
GL_PROXY_TEXTURE_2D_ARRAY_EXT = GL_PROXY_TEXTURE_2D_ARRAY_EXT
GL_TEXTURE_1D_ARRAY_EXT = GL_TEXTURE_1D_ARRAY_EXT
GL_TEXTURE_2D_ARRAY_EXT = GL_TEXTURE_2D_ARRAY_EXT
GL_TEXTURE_BINDING_1D_ARRAY_EXT = GL_TEXTURE_BINDING_1D_ARRAY_EXT
GL_TEXTURE_BINDING_2D_ARRAY_EXT = GL_TEXTURE_BINDING_2D_ARRAY_EXT
__file__ = '/home/mcfletch/pylive/OpenGL/GL/EXT/texture_array.pyc'
__name__ = 'OpenGL.GL.EXT.texture_array'
__package__ = 'OpenGL.GL.EXT'