| | '''OpenGL extension EXT.packed_float |
| | |
| | This module customises the behaviour of the |
| | OpenGL.raw.GL.EXT.packed_float to provide a more |
| | Python-friendly API |
| | |
| | Overview (from the spec) |
| | |
| | This extension adds a new 3-component floating-point texture format |
| | that fits within a single 32-bit word. This format stores 5 bits |
| | of biased exponent per component in the same manner as 16-bit |
| | floating-point formats, but rather than 10 mantissa bits, the red, |
| | green, and blue components have 6, 6, and 5 bits respectively. |
| | Each mantissa is assumed to have an implied leading one except in the |
| | denorm exponent case. There is no sign bit so only non-negative |
| | values can be represented. Positive infinity, positive denorms, |
| | and positive NaN values are representable. The value of the fourth |
| | component returned by a texture fetch is always 1.0. |
| | |
| | This extension also provides support for rendering into an unsigned |
| | floating-point rendering format with the assumption that the texture |
| | format described above could also be advertised as an unsigned |
| | floating-point format for rendering. |
| | |
| | The extension also provides a pixel external format for specifying |
| | packed float values directly. |
| | |
| | The official definition of this extension is available here: |
| | http://www.opengl.org/registry/specs/EXT/packed_float.txt |
| | ''' |
| | from OpenGL import platform, constant, arrays |
| | from OpenGL import extensions, wrapper |
| | import ctypes |
| | from OpenGL.raw.GL import _types, _glgets |
| | from OpenGL.raw.GL.EXT.packed_float import * |
| | from OpenGL.raw.GL.EXT.packed_float import _EXTENSION_NAME |
| |
|
| | def glInitPackedFloatEXT(): |
| | '''Return boolean indicating whether this extension is available''' |
| | from OpenGL import extensions |
| | return extensions.hasGLExtension( _EXTENSION_NAME ) |
| |
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| |
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| | |
