| '''OpenGL extension APPLE.element_array |
| |
| This module customises the behaviour of the |
| OpenGL.raw.GL.APPLE.element_array to provide a more |
| Python-friendly API |
| |
| Overview (from the spec) |
| |
| This extension provides facilities to improve DrawElements style vertex |
| indices submission performance by allowing index arrays. Using this |
| extension these arrays can be contained inside a vertex array range and |
| thus pulled directly by the graphics processor, avoiding the CPU overhead |
| of touching the index data. |
| |
| This extension is most useful when used in conjunction with the |
| APPLE_vertex_array_range extension. APPLE_vertex_array_range provides an |
| interface for storing vertex array data. In cases where large amounts of |
| vertex data are in use, the index data used to construct primitives |
| (typically as passed to the GL through DrawElements) can impose a |
| significant bandwidth burden. APPLE_element_array allows the application to |
| specify independent arrays of elements, which can then be cached using |
| APPLE_vertex_array_range. In effect this creates a more orthogonal |
| interface for both vertex indices and data. |
| |
| |
| The official definition of this extension is available here: |
| http://www.opengl.org/registry/specs/APPLE/element_array.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.APPLE.element_array import * |
| from OpenGL.raw.GL.APPLE.element_array import _EXTENSION_NAME |
|
|
| def glInitElementArrayAPPLE(): |
| '''Return boolean indicating whether this extension is available''' |
| from OpenGL import extensions |
| return extensions.hasGLExtension( _EXTENSION_NAME ) |
|
|
| |
| glElementPointerAPPLE=wrapper.wrapper(glElementPointerAPPLE).setInputArraySize( |
| 'pointer', None |
| ) |
| |
| |
| glMultiDrawElementArrayAPPLE=wrapper.wrapper(glMultiDrawElementArrayAPPLE).setInputArraySize( |
| 'count', None |
| ).setInputArraySize( |
| 'first', None |
| ) |
| |
| |
| glMultiDrawRangeElementArrayAPPLE=wrapper.wrapper(glMultiDrawRangeElementArrayAPPLE).setInputArraySize( |
| 'count', None |
| ).setInputArraySize( |
| 'first', None |
| ) |
| |
|
|