| '''OpenGL extension MESA.window_pos |
| |
| This module customises the behaviour of the |
| OpenGL.raw.GL.MESA.window_pos to provide a more |
| Python-friendly API |
| |
| Overview (from the spec) |
| |
| In order to set the current raster position to a specific window |
| coordinate with the RasterPos command, the modelview matrix, projection |
| matrix and viewport must be set very carefully. Furthermore, if the |
| desired window coordinate is outside of the window's bounds one must |
| rely on a subtle side-effect of the Bitmap command in order to circumvent |
| frustum clipping. |
| |
| This extension provides a set of functions to directly set the |
| current raster position, bypassing the modelview matrix, the |
| projection matrix and the viewport to window mapping. Furthermore, |
| clip testing is not performed. |
| |
| This greatly simplifies the process of setting the current raster |
| position to a specific window coordinate prior to calling DrawPixels, |
| CopyPixels or Bitmap. |
| |
| The official definition of this extension is available here: |
| http://www.opengl.org/registry/specs/MESA/window_pos.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.MESA.window_pos import * |
| from OpenGL.raw.GL.MESA.window_pos import _EXTENSION_NAME |
|
|
| def glInitWindowPosMESA(): |
| '''Return boolean indicating whether this extension is available''' |
| from OpenGL import extensions |
| return extensions.hasGLExtension( _EXTENSION_NAME ) |
|
|
| glWindowPos2dvMESA=wrapper.wrapper(glWindowPos2dvMESA).setInputArraySize( |
| 'v', 2 |
| ) |
| glWindowPos2fvMESA=wrapper.wrapper(glWindowPos2fvMESA).setInputArraySize( |
| 'v', 2 |
| ) |
| glWindowPos2ivMESA=wrapper.wrapper(glWindowPos2ivMESA).setInputArraySize( |
| 'v', 2 |
| ) |
| glWindowPos2svMESA=wrapper.wrapper(glWindowPos2svMESA).setInputArraySize( |
| 'v', 2 |
| ) |
| glWindowPos3dvMESA=wrapper.wrapper(glWindowPos3dvMESA).setInputArraySize( |
| 'v', 3 |
| ) |
| glWindowPos3fvMESA=wrapper.wrapper(glWindowPos3fvMESA).setInputArraySize( |
| 'v', 3 |
| ) |
| glWindowPos3ivMESA=wrapper.wrapper(glWindowPos3ivMESA).setInputArraySize( |
| 'v', 3 |
| ) |
| glWindowPos3svMESA=wrapper.wrapper(glWindowPos3svMESA).setInputArraySize( |
| 'v', 3 |
| ) |
| glWindowPos4dvMESA=wrapper.wrapper(glWindowPos4dvMESA).setInputArraySize( |
| 'v', 4 |
| ) |
| glWindowPos4fvMESA=wrapper.wrapper(glWindowPos4fvMESA).setInputArraySize( |
| 'v', 4 |
| ) |
| glWindowPos4ivMESA=wrapper.wrapper(glWindowPos4ivMESA).setInputArraySize( |
| 'v', 4 |
| ) |
| glWindowPos4svMESA=wrapper.wrapper(glWindowPos4svMESA).setInputArraySize( |
| 'v', 4 |
| ) |
| |
