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authormarha <marha@users.sourceforge.net>2013-06-04 09:07:26 +0200
committermarha <marha@users.sourceforge.net>2013-06-04 09:07:26 +0200
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-Name
-
- MESA_copy_sub_buffer
-
-Name Strings
-
- GLX_MESA_copy_sub_buffer
-
-Contact
-
- Brian Paul (brian.paul 'at' tungstengraphics.com)
-
-Status
-
- Shipping since Mesa 2.6 in February, 1998.
-
-Version
-
- Last Modified Date: 12 January 2009
-
-Number
-
- 215
-
-Dependencies
-
- OpenGL 1.0 or later is required.
- GLX 1.0 or later is required.
-
-Overview
-
- The glxCopySubBufferMESA() function copies a rectangular region
- of the back color buffer to the front color buffer. This can be
- used to quickly repaint 3D windows in response to expose events
- when the back color buffer cannot be damaged by other windows.
-
-IP Status
-
- Open-source; freely implementable.
-
-Issues
-
- None.
-
-New Procedures and Functions
-
- void glXCopySubBufferMESA( Display *dpy, GLXDrawable drawable,
- int x, int y, int width, int height );
-
-New Tokens
-
- None.
-
-Additions to Chapter 3 of the GLX 1.3 Specification (Functions and Errors)
-
- Add to section 3.3.10 Double Buffering:
-
- The function
-
- void glXCopySubBufferMESA( Display *dpy, GLXDrawable drawable,
- int x, int y, int width, int height );
-
- may be used to copy a rectangular region of the back color buffer to
- the front color buffer. This can be used to quickly repaint 3D windows
- in response to expose events when the back color buffer cannot be
- damaged by other windows.
-
- <x> and <y> indicates the lower-left corner of the region to copy and
- <width> and <height> indicate the size in pixels. Coordinate (0,0)
- corresponds to the lower-left pixel of the window, like glReadPixels.
-
- If dpy and drawable are the display and drawable for the calling
- thread's current context, glXCopySubBufferMESA performs an
- implicit glFlush before it returns. Subsequent OpenGL commands
- may be issued immediately after calling glXCopySubBufferMESA, but
- are not executed until the copy is completed.
-
-GLX Protocol
-
- None at this time. The extension is implemented in terms of ordinary
- Xlib protocol inside of Mesa.
-
-Errors
-
- None.
-
-New State
-
- None.
-
-Revision History
-
- 12 January 2009 Ian Romanick - Added language about implicit flush
- and command completion.
- 8 June 2000 Brian Paul - initial specification
-