ó š3jãó`•SrSSKJrJrJr SSKJrJr SSKrSSKJ r J r SSK 7 SSK J r Sr g) aOpenGL extension SGIS.shared_multisample This module customises the behaviour of the OpenGL.raw.GLX.SGIS.shared_multisample to provide a more Python-friendly API Overview (from the spec) While the OpenGL multisample extension (SGIS_multisample) provides good out-of-order antialiasing via subpixel samples, multisample hardware is very expensive because it multiplies the per-pixel framebuffer memory required to maintain color, depth, and stencil state by the number of samples. The cost-sensitive Location Based Entertainment (LBE) market desires good quality antialiasing, but the cost of maintaining multisample memory for every pixel in the framebuffer managed area is often prohibitive. Low-end multi-channel visual simulation may have similar cost constraints. LBE applications typically render several channels that are output to different video display devices. For example, an LBE application may render four 800x600 resolution channels, one per game player. While the total managed area may be 1600x1200, each channel ends up being rendered serially. With traditional multisampling (as specified by SGIS_multisample), multisample memory must be retained across the entire 1600x1200 managed area though in fact the application is never using more than an 800x600 rectangle of multisample pixel state at any given time. This sharing of multisample framebuffer state can result in a substantial competitive advantage for high-end multi-channel multisampling hardware for LBE applications. Unlike a "cheap PC per seat" solution, a high-end solution can be amortized by sharing both texture and multisample memory between the multiple channels (as well as host resources such as disk and CPUs). For cheap PCs to have the same amount of texture memory and quality of antialiasing, texture and multisample memory have to be replicated in every PC. In a typical windowed environment, the entire framebuffer managed area must retain multisample state because windows can be moved dynamically and resized (up to the entire size of the managed area). For LBE applications though, the layout of channel subrectangles in the framebuffer managed area is static and the LBE application monopolizes the graphics device (no other concurrent windowed apps). Because of their channel-oriented, dedicated, cost-sensitive nature, LBE applications can benefit from a means to share the available multisample memory resources among all the channels. The SGIS_shared_multisample extension specifies a single multisample buffer subrectangle sized smaller than the total managed area that is both shared among multiple windows and repositionable within in a window. Use of the SGIS_shared_multisample extension is predicated on specially configuring the window system, typically via a command line option added to the window system server's startup command. When run in this mode, OpenGL applications will see the GL_SGIS_shared_multisample string advertised in the GL_EXTENSIONS string (along with the GL_SGIS_multisample string). In this mode, the behavior of multisample extension changes. Instead of the multisample buffer memory being retained per-pixel across the entire managed area, multisample memory is shared among multisample windows and repositionable within a multisample window. Switching windows or repositioning the multisample subrectangle will make undefined the shared state within the multisample, depth, stencil, and accumulation buffers. When rendering into a multisample window, fragments that fall outside the window's multisample subrectangle are discarded (scissored). By default, the window's multisample rectangle is positioned at its window origin. The official definition of this extension is available here: http://www.opengl.org/registry/specs/SGIS/shared_multisample.txt é)ÚplatformÚconstantÚarrays)Ú extensionsÚwrapperN)Ú_typesÚ_glgets)Ú*)Ú_EXTENSION_NAMEcó:•SSKJn UR"[5$)z=Return boolean indicating whether this extension is availabler©r)ÚOpenGLrÚhasGLExtensionr r s Ú\/home/wildlama/miniconda3/lib/python3.13/site-packages/OpenGL/GLX/SGIS/shared_multisample.pyÚglInitSharedMultisampleSGISrWs€å!Ø × $Ò $¤oÓ 7Ð7ó)Ú__doc__rrrrrrÚctypesÚOpenGL.raw.GLXrr Ú&OpenGL.raw.GLX.SGIS.shared_multisampler r©rrÚrs(ðñN÷^.Ñ-ß&Û ß*Ü4ÝBó8r