| '''OpenGL extension ARB.buffer_storage |
| |
| This module customises the behaviour of the |
| OpenGL.raw.GL.ARB.buffer_storage to provide a more |
| Python-friendly API |
| |
| Overview (from the spec) |
| |
| OpenGL has long supported buffer objects as a means of storing data |
| that may be used to source vertex attributes, pixel data for textures, |
| uniforms and other elements. In un-extended GL, buffer data stores |
| are mutable - that is, they may be de-allocated or resized while they |
| are in use. The GL_ARB_texture_storage extension added immutable storage |
| for texture object (and was subsequently incorporated into OpenGL 4.2). |
| This extension further applies the concept of immutable storage to |
| buffer objects. If an implementation is aware of a buffer's immutability, |
| it may be able to make certain assumptions or apply particular |
| optimizations in order to increase performance or reliability. |
| |
| Furthermore, this extension allows applications to pass additional |
| information about a requested allocation to the implementation which it |
| may use to select memory heaps, caching behavior or allocation strategies. |
| |
| Finally, this extension introduces the concept of persistent client |
| mappings of buffer objects, which allow clients to retain pointers to a |
| buffer's data store returned as the result of a mapping, and to issue |
| drawing commands while those mappings are in place. |
| |
| The official definition of this extension is available here: |
| http://www.opengl.org/registry/specs/ARB/buffer_storage.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.ARB.buffer_storage import * |
| from OpenGL.raw.GL.ARB.buffer_storage import _EXTENSION_NAME |
|
|
| def glInitBufferStorageARB(): |
| '''Return boolean indicating whether this extension is available''' |
| from OpenGL import extensions |
| return extensions.hasGLExtension( _EXTENSION_NAME ) |
|
|
| |
| glBufferStorage=wrapper.wrapper(glBufferStorage).setInputArraySize( |
| 'data', None |
| ) |
| |
