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'''OpenGL extension NV.parameter_buffer_object2
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This module customises the behaviour of the
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OpenGL.raw.GL.NV.parameter_buffer_object2 to provide a more
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Overview (from the spec)
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This extension builds on the NV_parameter_buffer_object extension to
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provide additional flexibility in sourcing data from buffer objects.
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The original NV_parameter_buffer_object (PaBO) extension provided the
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ability to bind buffer objects to a set of numbered binding points and
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access them in assembly programs as though they were arrays of 32-bit
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scalars (via the BUFFER variable type) or arrays of four-component vectors
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with 32-bit scalar components (via the BUFFER4 variable type). However,
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the functionality it provided had some significant limits on flexibility.
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Since any given buffer binding point could be used either as a BUFFER or
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BUFFER4, but not both, programs couldn't do both 32- and 128-bit fetches
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from a single binding point. Additionally, No support was provided for
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8-, 16-, or 64-bit fetches, though they could be emulated using a larger
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loads, with bitfield operations and/or write masking to put components in
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the right places. Indexing was supported, but strides were limited to 4-
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and 16-byte multiples, depending on whether BUFFER or BUFFER4 is used.
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This new extension provides the buffer variable declaration type CBUFFER
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to specify a buffer that is treated as an array of bytes, rather than an
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array of words or vectors. The LDC instruction allows programs to extract
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a vector of data from a CBUFFER variable, using a size and component count
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specified in the opcode modifier. 1-, 2-, and 4-component fetches are
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supported. The LDC instruction supports byte offsets using normal array
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indexing mechanisms; both run-time and immediate offsets are supported.
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Offsets used for a buffer object fetch are required to be aligned to the
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size of the fetch (1, 2, 4, 8, or 16 bytes).
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The official definition of this extension is available here:
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http://www.opengl.org/registry/specs/NV/parameter_buffer_object2.txt
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from OpenGL import platform, constants, constant, arrays
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from OpenGL import extensions, wrapper
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from OpenGL.GL import glget
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from OpenGL.raw.GL.NV.parameter_buffer_object2 import *
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### END AUTOGENERATED SECTION
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GL/NV/parameter_buffer_object2.py
