initial check-in
This commit is contained in:
Brian Paul
parent
4c07bd5709
commit
7b2c0f9148
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Name
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MESA_copy_sub_buffer
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Name Strings
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GLX_MESA_copy_sub_buffer
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Contact
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Brian Paul (brian 'at' mesa3d.org)
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Status
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Shipping since Mesa 2.6 in February, 1998.
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Version
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Last Modified Date: 8 June 2000
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Number
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???
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Dependencies
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OpenGL 1.0 or later is required.
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GLX 1.0 or later is required.
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Overview
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The glxCopySubBufferMESA() function copies a rectangular region
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of the back color buffer to the front color buffer. This can be
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used to quickly repaint 3D windows in response to expose events
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when the back color buffer cannot be damaged by other windows.
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IP Status
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Open-source; freely implementable.
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Issues
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None.
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New Procedures and Functions
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void glXCopySubBufferMESA( Display *dpy, GLXDrawable drawable,
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int x, int y, int width, int height );
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New Tokens
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None.
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Additions to Chapter 3 of the GLX 1.3 Specification (Functions and Errors)
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Add to section 3.3.10 Double Buffering:
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The function
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void glXCopySubBufferMESA( Display *dpy, GLXDrawable drawable,
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int x, int y, int width, int height );
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may be used to copy a rectangular region of the back color buffer to
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the front color buffer. This can be used to quickly repaint 3D windows
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in response to expose events when the back color buffer cannot be
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damaged by other windows.
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<x> and <y> indicates the lower-left corner of the region to copy and
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<width> and <height> indicate the size in pixels. Coordinate (0,0)
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corresponds to the lower-left pixel of the window, like glReadPixels.
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GLX Protocol
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None at this time. The extension is implemented in terms of ordinary
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Xlib protocol inside of Mesa.
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Errors
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None.
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New State
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None.
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Revision History
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8 June 2000 - initial specification
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Name
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MESA_copy_sub_buffer
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Name Strings
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GLX_MESA_copy_sub_buffer
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Contact
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Brian Paul (brian 'at' mesa3d.org)
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Status
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Shipping since Mesa 1.2.8 in May, 1996.
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Version
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Last Modified Date: 8 June 2000
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Number
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???
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Dependencies
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OpenGL 1.0 or later is required.
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GLX 1.0 or later is required.
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Overview
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Since Mesa allows RGB rendering into drawables with PseudoColor,
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StaticColor, GrayScale and StaticGray visuals, Mesa needs a colormap
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in order to compute pixel values during rendering.
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The colormap associated with a window can be queried with normal
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Xlib functions but there is no colormap associated with pixmaps.
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The glXCreateGLXPixmapMESA function is an alternative to glXCreateGLXPixmap
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which allows specification of a colormap.
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IP Status
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Open-source; freely implementable.
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Issues
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None.
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New Procedures and Functions
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GLXPixmap glXCreateGLXPixmapMESA( Display *dpy, XVisualInfo *visual,
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Pixmap pixmap, Colormap cmap );
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New Tokens
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None.
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Additions to Chapter 3 of the GLX 1.3 Specification (Functions and Errors)
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Add to section 3.4.2 Off Screen Rendering
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The Mesa implementation of GLX allows RGB rendering into X windows and
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pixmaps of any visual class, not just TrueColor or DirectColor. In order
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to compute pixel values from RGB values Mesa requires a colormap.
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The function
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GLXPixmap glXCreateGLXPixmapMESA( Display *dpy, XVisualInfo *visual,
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Pixmap pixmap, Colormap cmap );
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allows one to create a GLXPixmap with a specific colormap. The image
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rendered into the pixmap may then be copied to a window (which uses the
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same colormap and visual) with the expected results.
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GLX Protocol
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None since this is a client-side extension.
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Errors
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None.
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New State
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None.
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Revision History
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8 June 2000 - initial specification
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@ -0,0 +1,85 @@
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Name
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MESA_release_buffers
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Name Strings
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GLX_MESA_release_buffers
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Contact
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Brian Paul (brian 'at' mesa3d.org)
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Status
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Shipping since Mesa 2.0 in October, 1996.
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Version
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Last Modified Date: 8 June 2000
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Number
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???
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Dependencies
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OpenGL 1.0 or later is required.
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GLX 1.0 or later is required.
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Overview
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Mesa's implementation of GLX is entirely implemented on the client side.
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Therefore, Mesa cannot immediately detect when an X window or pixmap is
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destroyed in order to free any ancilliary data associated with the window
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or pixmap.
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The glxMesaReleaseBuffers() function can be used to explicitly indicate
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when the back color buffer, depth buffer, stencil buffer, and/or accum-
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ulation buffer associated with a drawable can be freed.
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IP Status
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Open-source; freely implementable.
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Issues
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None.
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New Procedures and Functions
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Bool glXReleaseBuffersMESA( Display *dpy, GLXDrawable d );
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New Tokens
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None.
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Additions to Chapter 3 of the GLX 1.3 Specification (Functions and Errors)
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The function
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Bool glXReleaseBuffersMESA( Display *dpy, GLXDrawable d );
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causes all software ancilliary buffers (back buffer, depth, stencil,
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accum, etc) associated with the named drawable to be immediately
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deallocated. True is returned if <d> is a valid Mesa GLX drawable,
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else False is returned. After calling glXReleaseBuffersMESA, the
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drawable should no longer be used for GL rendering. Results of
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attempting to do so are undefined.
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GLX Protocol
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None, since this is a client-side operation.
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Errors
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None.
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New State
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None.
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Revision History
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8 June 2000 - initial specification
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@ -0,0 +1,85 @@
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Name
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MESA_set_3dfx_mode
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Name Strings
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GLX_MESA_set_3dfx_mode
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Contact
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Brian Paul (brian 'at' mesa3d.org)
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Status
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Shipping since Mesa 2.6 in February, 1998.
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Version
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Last Modified Date: 8 June 2000
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Number
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???
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Dependencies
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OpenGL 1.0 or later is required.
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GLX 1.0 or later is required.
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Overview
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The Mesa Glide driver allows full-screen rendering or rendering into
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an X window. The glXSet3DfxModeMESA() function allows an application
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to switch between full-screen and windowed rendering.
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IP Status
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Open-source; freely implementable.
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Issues
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None.
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New Procedures and Functions
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GLboolean glXSet3DfxModeMESA( GLint mode );
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New Tokens
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GLX_3DFX_WINDOW_MODE_MESA 0x1
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GLX_3DFX_FULLSCREEN_MODE_MESA 0x2
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Additions to Chapter 3 of the GLX 1.3 Specification (Functions and Errors)
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The Mesa Glide device driver allows either rendering in full-screen
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mode or rendering into an X window. An application can switch between
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full-screen and window rendering with the command:
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GLboolean glXSet3DfxModeMESA( GLint mode );
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<mode> may either be GLX_3DFX_WINDOW_MODE_MESA to indicate window
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rendering or GLX_3DFX_FULLSCREEN_MODE_MESA to indicate full-screen mode.
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GL_TRUE is returned if <mode> is valid and the operation completed
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normally. GL_FALSE is returned if <mode> is invalid or if the Glide
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driver is not being used.
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Note that only one drawable and context can be created at any given
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time with the Mesa Glide driver.
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GLX Protocol
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None since this is a client-side extension.
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Errors
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None.
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New State
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None.
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Revision History
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8 June 2000 - initial specification
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