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authorBrian Paul <brian.paul@tungstengraphics.com>1999-07-20 00:30:41 +0000
committerBrian Paul <brian.paul@tungstengraphics.com>1999-07-20 00:30:41 +0000
commit3e07e16ac7ae5035e78df74240eab346b823694c (patch)
tree629cdaeaaf19463f3f3a14c3d4eddf7f305d635c
parent99412b9f1e58d030cf94aae43171439c1875bfbd (diff)
initial rev
-rw-r--r--docs/MESA_resize_buffers.spec82
-rw-r--r--docs/MESA_window_pos.spec114
2 files changed, 196 insertions, 0 deletions
diff --git a/docs/MESA_resize_buffers.spec b/docs/MESA_resize_buffers.spec
new file mode 100644
index 00000000000..8c0b033ff26
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+++ b/docs/MESA_resize_buffers.spec
@@ -0,0 +1,82 @@
+Name
+
+ MESA_resize_buffers
+
+Name Strings
+
+ GL_MESA_resize_buffers
+
+Contact
+
+ Brian Paul, brianp 'at' mesa3d.org
+
+Status
+
+ Shipping (since Mesa version 2.2)
+
+Version
+
+ $Id: MESA_resize_buffers.spec,v 1.1 1999/07/20 00:30:41 brianp Exp $
+
+Number
+
+ XXX none assigned
+
+Dependencies
+
+ Mesa 2.2 or later is required.
+
+Overview
+
+ Mesa is often used as a client library with no integration with
+ the computer's window system (an X server, for example). And since
+ Mesa does not have an event loop nor window system callbacks, it
+ cannot properly respond to window system events. In particular,
+ Mesa cannot automatically detect when a window has been resized.
+
+ Mesa's glViewport command queries the current window size and updates
+ its internal data structors accordingly. This normally works fine
+ since most applications call glViewport in responce to window size
+ changes.
+
+ In some situations, however, the application may not call glViewport
+ when a window size changes but would still like Mesa to adjust to
+ the new window size. This extension exports a new function to solve
+ this problem.
+
+New Procedures and Functions
+
+ void glResizeBuffersMESA( void )
+
+New Tokens
+
+ none
+
+Additions to the OpenGL Specification (no particular section)
+
+ The glResizeBuffersMESA command may be called when the client
+ determines that a window has been resized. Calling
+ glResizeBuffersMESA causes Mesa to query the current window size
+ and adjust its internal data structures. This may include
+ reallocating depth, stencil, alpha and accumulation buffers.
+
+Additions to the AGL/GLX/WGL Specifications
+
+ None
+
+Errors
+
+ INVALID_OPERATION is generated if ResizeBuffersMESA is called betweeen
+ Begin and End.
+
+New State
+
+ None.
+
+New Implementation Dependent State
+
+ None.
+
+Revision History
+
+ * Revision 1.0 - Initial specification
diff --git a/docs/MESA_window_pos.spec b/docs/MESA_window_pos.spec
new file mode 100644
index 00000000000..427bb0eeb52
--- /dev/null
+++ b/docs/MESA_window_pos.spec
@@ -0,0 +1,114 @@
+Name
+
+ MESA_window_pos
+
+Name Strings
+
+ GL_MESA_window_pos
+
+Contact
+
+ Brian Paul, brianp 'at' mesa3d.org
+
+Status
+
+ Shipping (since Mesa version 1.2.8)
+
+Version
+
+ $Id: MESA_window_pos.spec,v 1.1 1999/07/20 00:30:41 brianp Exp $
+
+Number
+
+ XXX non assigned
+
+Dependencies
+
+ OpenGL 1.0 is required.
+ The extension is written against the OpenGL 1.2 Specification
+
+Overview
+
+ In order to set the current raster position to a specific window
+ coordinate with the RasterPos command, the modelview matrix, projection
+ matrix and viewport must be set very carefully. Furthermore, if the
+ desired window coordinate is outside of the window's bounds one must
+ rely a subtle side-effect of the Bitmap command in order to circumvent
+ frustum clipping.
+
+ This extension provides a set of functions to directly set the
+ current raster position, bypassing the modelview matrix, the
+ projection matrix and the viewport to window mapping. Furthermore,
+ clip testing is not performed.
+
+ This greatly simplifies the process of setting the current raster
+ position to a specific window coordinate prior to calling DrawPixels,
+ CopyPixels or Bitmap.
+
+New Procedures and Functions
+
+ void WindowPos2dMESA(double x, double y)
+ void WindowPos2fMESA(float x, float y)
+ void WindowPos2iMESA(int x, int y)
+ void WindowPos2sMESA(short x, short y)
+
+New Tokens
+
+ none
+
+Additions to Chapter 2 of the OpenGL 1.2 Specification (OpenGL Operation)
+
+ - (2.12, p. 41) Insert after third paragraph:
+
+ Alternately, the current raster position may be set by one of the
+ WindowPosMESA commands:
+
+ void WindowPos{234}{sidf}MESA( T coords );
+ void Window Pos{234}{sidf}vMESA( T coords );
+
+ WindosPos4MESA takes four values indicating x, y, z, and w.
+ WindowPos3MESA (or WindowPos2MESA) is analaguos, but sets only
+ x, y, and z with w implicitly set to 1 (or only x and y with z
+ implicititly set to 0 and w implicitly set to 1).
+
+ WindowPosMESA operates like RasterPos except that the current modelview
+ matrix, projection matrix and viewport parameters are ignored and the
+ clip test operation always passes. The current raster position values
+ are directly set to the parameters passed to WindowPosMESA. The current
+ color, color index and texture coordinate update the current raster
+ position's associated data.
+
+ The current raster distance ??? XXX ???
+
+
+
+
+
+
+
+Additions to the AGL/GLX/WGL Specifications
+
+ None
+
+GLX Protocol
+
+ Not specified at this time. However, a protocol message very similar
+ to that of RasterPos is expected.
+
+Errors
+
+ INVALID_OPERATION is generated if WindowPosMESA is called betweeen
+ Begin and End.
+
+
+New State
+
+ None.
+
+New Implementation Dependent State
+
+ None.
+
+Revision History
+
+ * Revision 1.0 - Initial specification