| | '''OpenGL extension SGIS.multisample |
| | |
| | This module customises the behaviour of the |
| | OpenGL.raw.GLX.SGIS.multisample to provide a more |
| | Python-friendly API |
| | |
| | Overview (from the spec) |
| | |
| | This extension provides a mechanism to antialias all GL primitives: |
| | points, lines, polygons, bitmaps, and images. The technique is to |
| | sample all primitives multiple times at each pixel. The color sample |
| | values are resolved to a single, displayable color each time a pixel |
| | is updated, so the antialiasing appears to be automatic at the |
| | application level. Because each sample includes depth and stencil |
| | information, the depth and stencil functions perform equivalently |
| | to the single-sample mode. |
| | |
| | An additional buffer, called the multisample buffer, is added to |
| | the framebuffer. Pixel sample values, including color, depth, and |
| | stencil values, are stored in this buffer. When the framebuffer |
| | includes a multisample buffer, it does not also include separate |
| | depth or stencil buffers, even if the multisample buffer does not |
| | store depth or stencil values. Color buffers (left/right, front/ |
| | back, and aux) do coexist with the multisample buffer, however. |
| | |
| | Multisample antialiasing is most valuable for rendering polygons, |
| | because it requires no sorting for hidden surface elimination, and |
| | it correctly handles adjacent polygons, object silhouettes, and |
| | even intersecting polygons. If only points or lines are being |
| | rendered, the "smooth" antialiasing mechanism provided by the base |
| | GL may result in a higher quality image. This extension is designed |
| | to allow multisample and smooth antialiasing techniques to be |
| | alternated during the rendering of a single scene. |
| | |
| | The official definition of this extension is available here: |
| | http://www.opengl.org/registry/specs/SGIS/multisample.txt |
| | ''' |
| | from OpenGL import platform, constant, arrays |
| | from OpenGL import extensions, wrapper |
| | import ctypes |
| | from OpenGL.raw.GLX import _types, _glgets |
| | from OpenGL.raw.GLX.SGIS.multisample import * |
| | from OpenGL.raw.GLX.SGIS.multisample import _EXTENSION_NAME |
| |
|
| | def glInitMultisampleSGIS(): |
| | '''Return boolean indicating whether this extension is available''' |
| | from OpenGL import extensions |
| | return extensions.hasGLExtension( _EXTENSION_NAME ) |
| |
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| |
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| | |
