| | '''OpenGL extension MESA.pack_invert |
| | |
| | This module customises the behaviour of the |
| | OpenGL.raw.GL.MESA.pack_invert to provide a more |
| | Python-friendly API |
| | |
| | Overview (from the spec) |
| | |
| | This extension adds a new pixel storage parameter to indicate that |
| | images are to be packed in top-to-bottom order instead of OpenGL's |
| | conventional bottom-to-top order. Only pixel packing can be |
| | inverted (i.e. for glReadPixels, glGetTexImage, glGetConvolutionFilter, |
| | etc). |
| | |
| | Almost all known image file formats store images in top-to-bottom |
| | order. As it is, OpenGL reads images from the frame buffer in |
| | bottom-to-top order. Thus, images usually have to be inverted before |
| | writing them to a file with image I/O libraries. This extension |
| | allows images to be read such that inverting isn't needed. |
| | |
| | The official definition of this extension is available here: |
| | http://www.opengl.org/registry/specs/MESA/pack_invert.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.pack_invert import * |
| | from OpenGL.raw.GL.MESA.pack_invert import _EXTENSION_NAME |
| |
|
| | def glInitPackInvertMESA(): |
| | '''Return boolean indicating whether this extension is available''' |
| | from OpenGL import extensions |
| | return extensions.hasGLExtension( _EXTENSION_NAME ) |
| |
|
| |
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| | |
