| '''OpenGL extension SGIX.resample |
| |
| This module customises the behaviour of the |
| OpenGL.raw.GL.SGIX.resample to provide a more |
| Python-friendly API |
| |
| Overview (from the spec) |
| |
| This extension enhances the unpacking resampling capabilities |
| of the SGIX_subsample extension. |
| |
| When pixel data is received from the client and an unpacking |
| upsampling mode other than PIXEL_SUBSAMPLE_RATE_4444_SGIX is |
| specified, the upsampling is performed via one of two methods: |
| RESAMPLE_REPLICATE_SGIX, RESAMPLE_ZERO_FILL_SGIX. |
| Replicate and zero fill are provided to |
| give the application greatest performance and control over the |
| filtering process. |
| |
| However, when pixel data is read back to the client and a |
| packing downsampling mode other than PIXEL_SUBSAMPLE_RATE_4444_SGIX |
| is specified, downsampling is |
| performed via simple component decimation (point sampling). That is, |
| only the RESAMPLE_DECIMATE_SGIX is valid. |
| |
| |
| The official definition of this extension is available here: |
| http://www.opengl.org/registry/specs/SGIX/resample.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.SGIX.resample import * |
| from OpenGL.raw.GL.SGIX.resample import _EXTENSION_NAME |
|
|
| def glInitResampleSGIX(): |
| '''Return boolean indicating whether this extension is available''' |
| from OpenGL import extensions |
| return extensions.hasGLExtension( _EXTENSION_NAME ) |
|
|
|
|
| |
