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- '''OpenGL extension SGIX.framezoom
-
- Overview (from the spec)
-
- This extension provides a additional way to rasterize geometric
- primitives and pixel rectangles. The techique is to reduce the
- number of pixels rasterized and (possibly) the number of depth and
- stencil operations performed per primitive. Each pixel is zoomed
- up and used to render an N x N block of screen pixels. The
- implementation is free to choose the number of stencil and z pixels
- that will correspond to each N x N block.
-
- This extension provides an opportunity to the implementation to
- perform expensive raster operations at a reduced resolution,
- increasing performance. Such operations may include
- texture-mapping, depth & stencil tests, etc. The hardware should
- be allowed to perform operations that it accelerates at full
- hardware speed.
-
- The visual result will be the same as if a scene were rendered into
- a small window, and then that buffer was copied and zoomed up into
- a large window.
-
- All OpenGL parameters that effect rasterization size will implicitly
- be multipled by N (this includes point size, line width, etc).
-
- The official definition of this extension is available here:
- http://oss.sgi.com/projects/ogl-sample/registry/SGIX/framezoom.txt
-
- Automatically generated by the get_gl_extensions script, do not edit!
- '''
- from OpenGL import platform, constants, constant, arrays
- from OpenGL import extensions
- from OpenGL.GL import glget
- import ctypes
- EXTENSION_NAME = 'GL_SGIX_framezoom'
- GL_FRAMEZOOM_SGIX = constant.Constant( 'GL_FRAMEZOOM_SGIX', 0x818B )
- GL_FRAMEZOOM_FACTOR_SGIX = constant.Constant( 'GL_FRAMEZOOM_FACTOR_SGIX', 0x818C )
- GL_MAX_FRAMEZOOM_FACTOR_SGIX = constant.Constant( 'GL_MAX_FRAMEZOOM_FACTOR_SGIX', 0x818D )
- glFrameZoomSGIX = platform.createExtensionFunction(
- 'glFrameZoomSGIX', dll=platform.GL,
- extension=EXTENSION_NAME,
- resultType=None,
- argTypes=(constants.GLint,),
- doc = 'glFrameZoomSGIX( GLint(factor) ) -> None',
- argNames = ('factor',),
- )
-
-
- def glInitFramezoomSGIX():
- '''Return boolean indicating whether this extension is available'''
- return extensions.hasGLExtension( EXTENSION_NAME )
-