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