# OpenGL.GL.EXT.texture_shared_exponent

OpenGL extension EXT.texture_shared_exponent

This module customises the behaviour of the
OpenGL.raw.GL.EXT.texture_shared_exponent to provide a more
Python-friendly API

Overview (from the spec)

Existing texture formats provide either fixed-point formats with
limited range and precision but with compact encodings (allowing 32
or fewer bits per multi-component texel), or floating-point formats
with tremendous range and precision but without compact encodings
(typically 16 or 32 bits per component).

This extension adds a new packed format and new internal texture
format for encoding 3-component vectors (typically RGB colors) with
a single 5-bit exponent (biased up by 15) and three 9-bit mantissas
for each respective component. There is no sign bit so all three
components must be non-negative. The fractional mantissas are
stored without an implied 1 to the left of the decimal point.
Neither infinity nor not-a-number (NaN) are representable in this
shared exponent format.

This 32 bits/texel shared exponent format is particularly well-suited
to high dynamic range (HDR) applications where light intensity is
typically stored as non-negative red, green, and blue components
with considerable range.

The official definition of this extension is available here:
http://www.opengl.org/registry/specs/EXT/texture_shared_exponent.txt

## Functions

## Constants

GL_RGB9_E5_EXT (35901)

GL_TEXTURE_SHARED_SIZE_EXT (35903)

GL_UNSIGNED_INT_5_9_9_9_REV_EXT (35902)