Spaces:
Sleeping
Sleeping
| from .base import Platform | |
| __all__ = ['OSMesaPlatform'] | |
| class OSMesaPlatform(Platform): | |
| """Renders into a software buffer using OSMesa. Requires special versions | |
| of OSMesa to be installed, plus PyOpenGL upgrade. | |
| """ | |
| def __init__(self, viewport_width, viewport_height): | |
| super(OSMesaPlatform, self).__init__(viewport_width, viewport_height) | |
| self._context = None | |
| self._buffer = None | |
| def init_context(self): | |
| from OpenGL import arrays | |
| from OpenGL.osmesa import ( | |
| OSMesaCreateContextAttribs, OSMESA_FORMAT, | |
| OSMESA_RGBA, OSMESA_PROFILE, OSMESA_CORE_PROFILE, | |
| OSMESA_CONTEXT_MAJOR_VERSION, OSMESA_CONTEXT_MINOR_VERSION, | |
| OSMESA_DEPTH_BITS | |
| ) | |
| attrs = arrays.GLintArray.asArray([ | |
| OSMESA_FORMAT, OSMESA_RGBA, | |
| OSMESA_DEPTH_BITS, 24, | |
| OSMESA_PROFILE, OSMESA_CORE_PROFILE, | |
| OSMESA_CONTEXT_MAJOR_VERSION, 3, | |
| OSMESA_CONTEXT_MINOR_VERSION, 3, | |
| 0 | |
| ]) | |
| self._context = OSMesaCreateContextAttribs(attrs, None) | |
| self._buffer = arrays.GLubyteArray.zeros( | |
| (self.viewport_height, self.viewport_width, 4) | |
| ) | |
| def make_current(self): | |
| from OpenGL import GL as gl | |
| from OpenGL.osmesa import OSMesaMakeCurrent | |
| assert(OSMesaMakeCurrent( | |
| self._context, self._buffer, gl.GL_UNSIGNED_BYTE, | |
| self.viewport_width, self.viewport_height | |
| )) | |
| def make_uncurrent(self): | |
| """Make the OpenGL context uncurrent. | |
| """ | |
| pass | |
| def delete_context(self): | |
| from OpenGL.osmesa import OSMesaDestroyContext | |
| OSMesaDestroyContext(self._context) | |
| self._context = None | |
| self._buffer = None | |
| def supports_framebuffers(self): | |
| return False | |