| | '''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 |
| | ) |
| | |
