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-
- XXX - Not complete yet!!!
-
- Name
-
- SGIX_video_source
-
- Name Strings
-
- GLX_SGIX_video_source
-
- Version
-
- $Date: 1996/04/01 23:23:33 $ $Revision: 1.1 $
-
- Number
-
- 43
-
- Dependencies
-
- SGI_make_current_read is required.
-
- Overview
-
- This extension provides the capability to source pixel data from a
- video stream. A new type of GLXDrawable (GLXVideoSourceSGIX) is
- introduced which represents the drain node of a Video Library (VL)
- path. A GLXVideoSourceSGIX may be specified as the <read> parameter
- to glXMakeCurrentReadSGI to indicate that pixel data should be read
- from the specified video source instead of from the framebuffer. A
- GLXVideoSourceSGIX may only be specified as a <read> drawable.
-
- Issues
-
- * Should there be a way to query the configuration
- of a GLXVideoSourceSGIX?
-
- New Procedures and Functions
-
- typedef XID GLXVideoSourceSGIX;
-
- GLXVideoSourceSGIX glXCreateGLXVideoSourceSGIX(Display *display,
- int screen,
- VLServer server,
- VLPath path,
- int nodeClass,
- VLNode drainNode);
-
- void glXDestroyGLXVideoSourceSGIX(Display *dpy,
- GLXVideoSourceSGIX glxvideosource);
-
- New Tokens
-
- Additions to Chapter 2 of the 1.0 Specification (OpenGL Operation)
-
- None.
-
- Additions to Chapter 3 of the 1.0 Specification (Rasterization)
-
- None.
-
- Additions to Chapter 4 of the 1.0 Specification (Per-Fragment Operations
- and the Frame Buffer)
-
- None.
-
- Additions to Chapter 5 of the 1.0 Specification (Special Functions)
-
- None.
-
- Additions to Chapter 6 of the 1.0 Specification (State and State Requests)
-
- None.
-
- Additions to the GLX Specification
-
- XXX - not complete yet
-
- A GLXVideoSourceSGIX is created using the glXCreateGLXVideoSourceSGIX
- command. The parameter <display> specifies a connection to an X server.
- The parameter <screen> specifies the screen on which the GLXVideoSourceSGIX
- should be created. The parameter <server> specifies a connection to a
- video server. The parameter <path> specifies a video transfer path.
- The parameter <drainNode> specifies a VLNode which must be a VL_DRAIN
- node on the video transfer path specified by <path>. The parameter
- <nodeClass> specifies the class of the VLNode specified by <drainNode>.
-
- A GLXVideoSourceSGIX may only be used with GLXContexts created on the
- same same screen.
-
- The configuration of a GLXVideoSourceSGIX is static, and is fixed at
- the time that the GLXVideoSourceSGIX is created. If any of the controls
- which affect the transfer of video data to the GL are changed on the video
- transfer path for which a particular GLXVideoSourceSGIX was created, the
- GLXVideoSourceSGIX should be destroyed and a new GLXVideoSourceSGIX
- should be created. Otherwise, the data read from the GLXVideoSourceSGIX
- will be undefined.
-
- A GLXVideoSourceSGIX is destroyed by calling glXDestroyGLXVideoSourceSGIX
-
- Dependencies on SGI_make_current_read
-
- XXX - not complete yet
-
- Errors
-
- XXX - not complete yet
-
- BadMatch is generated if glXMakeCurrent parameter <drawable> is a
- GLXVideoSourceSGIX.
-
- BadMatch is generated if glXMakeCurrentReadSGI parameter <draw> is a
- GLXVideoSourceSGIX.
-
- BadMatch is generated if glXMakeCurrentReadSGI parameter <read> is a
- GLXVideoSourceSGIX which was created for a different screen than the
- GLXContext specified by the parameter <ctx>.
-
- GLXBadDrawable is generated if glXDestroyGLXVideoSourceSGIX parameter
- <glxvideosource> is not a valid GLXVideoSourceSGIX.
-
- BadAlloc is generated if glXCreateGLXVideoSourceSGIX is unable to allocate
- the resources needed to create a GLXVideoSourceSGIX.
-
- New State
-
- None.
-
- New Implementation Dependent State
-
- None.
-