OpenGL.GL.SGIX.framezoom

OpenGL extension SGIX.framezoom

This module customises the behaviour of the OpenGL.raw.GL.SGIX.framezoom to provide a more Python-friendly API

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://www.opengl.org/registry/specs/SGIX/framezoom.txt