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: 8 June 2000 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. and indicates the lower-left corner of the region to copy and and indicate the size in pixels. Coordinate (0,0) corresponds to the lower-left pixel of the window, like glReadPixels. 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 8 June 2000 - initial specification