Blame - docs/MESA_window_pos.spec - fp2-dev/platform/external/mesa3d

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Brian Paul	3e07e16	1999-07-20 00:30:41 +0000	[diff] [blame]	1	Name
				2
				3	MESA_window_pos
				4
				5	Name Strings
				6
				7	GL_MESA_window_pos
				8
				9	Contact
				10
Brian Paul	d3b09fe	2004-03-25 01:42:41 +0000	[diff] [blame]	11	Brian Paul, brian.paul 'at' tungstengraphics.com
Brian Paul	3e07e16	1999-07-20 00:30:41 +0000	[diff] [blame]	12
				13	Status
				14
				15	Shipping (since Mesa version 1.2.8)
				16
				17	Version
				18
Brian Paul	d3b09fe	2004-03-25 01:42:41 +0000	[diff] [blame]	19	$Id: MESA_window_pos.spec,v 1.4 2004/03/25 01:42:42 brianp Exp $
Brian Paul	3e07e16	1999-07-20 00:30:41 +0000	[diff] [blame]	20
				21	Number
				22
Brian Paul	2f8b4c9	2000-04-04 23:29:32 +0000	[diff] [blame]	23	197
Brian Paul	3e07e16	1999-07-20 00:30:41 +0000	[diff] [blame]	24
				25	Dependencies
				26
				27	OpenGL 1.0 is required.
				28	The extension is written against the OpenGL 1.2 Specification
				29
				30	Overview
				31
				32	In order to set the current raster position to a specific window
				33	coordinate with the RasterPos command, the modelview matrix, projection
				34	matrix and viewport must be set very carefully. Furthermore, if the
				35	desired window coordinate is outside of the window's bounds one must
Brian Paul	6132833	2000-01-07 08:47:15 +0000	[diff] [blame]	36	rely on a subtle side-effect of the Bitmap command in order to circumvent
Brian Paul	3e07e16	1999-07-20 00:30:41 +0000	[diff] [blame]	37	frustum clipping.
				38
				39	This extension provides a set of functions to directly set the
				40	current raster position, bypassing the modelview matrix, the
				41	projection matrix and the viewport to window mapping. Furthermore,
				42	clip testing is not performed.
				43
				44	This greatly simplifies the process of setting the current raster
				45	position to a specific window coordinate prior to calling DrawPixels,
				46	CopyPixels or Bitmap.
				47
				48	New Procedures and Functions
				49
				50	void WindowPos2dMESA(double x, double y)
				51	void WindowPos2fMESA(float x, float y)
				52	void WindowPos2iMESA(int x, int y)
				53	void WindowPos2sMESA(short x, short y)
Brian Paul	6132833	2000-01-07 08:47:15 +0000	[diff] [blame]	54	void WindowPos2ivMESA(const int *p)
				55	void WindowPos2svMESA(const short *p)
				56	void WindowPos2fvMESA(const float *p)
				57	void WindowPos2dvMESA(const double *p)
				58	void WindowPos3iMESA(int x, int y, int z)
				59	void WindowPos3sMESA(short x, short y, short z)
				60	void WindowPos3fMESA(float x, float y, float z)
				61	void WindowPos3dMESA(double x, double y, double z)
				62	void WindowPos3ivMESA(const int *p)
				63	void WindowPos3svMESA(const short *p)
				64	void WindowPos3fvMESA(const float *p)
				65	void WindowPos3dvMESA(const double *p)
				66	void WindowPos4iMESA(int x, int y, int z, int w)
				67	void WindowPos4sMESA(short x, short y, short z, short w)
				68	void WindowPos4fMESA(float x, float y, float z, float w)
				69	void WindowPos4dMESA(double x, double y, double z, double )
				70	void WindowPos4ivMESA(const int *p)
				71	void WindowPos4svMESA(const short *p)
				72	void WindowPos4fvMESA(const float *p)
				73	void WindowPos4dvMESA(const double *p)
Brian Paul	3e07e16	1999-07-20 00:30:41 +0000	[diff] [blame]	74
				75	New Tokens
				76
				77	none
				78
				79	Additions to Chapter 2 of the OpenGL 1.2 Specification (OpenGL Operation)
				80
				81	- (2.12, p. 41) Insert after third paragraph:
				82
				83	Alternately, the current raster position may be set by one of the
				84	WindowPosMESA commands:
				85
				86	void WindowPos{234}{sidf}MESA( T coords );
Brian Paul	6132833	2000-01-07 08:47:15 +0000	[diff] [blame]	87	void WindowPos{234}{sidf}vMESA( T coords );
Brian Paul	3e07e16	1999-07-20 00:30:41 +0000	[diff] [blame]	88
				89	WindosPos4MESA takes four values indicating x, y, z, and w.
				90	WindowPos3MESA (or WindowPos2MESA) is analaguos, but sets only
				91	x, y, and z with w implicitly set to 1 (or only x and y with z
				92	implicititly set to 0 and w implicitly set to 1).
				93
				94	WindowPosMESA operates like RasterPos except that the current modelview
				95	matrix, projection matrix and viewport parameters are ignored and the
				96	clip test operation always passes. The current raster position values
				97	are directly set to the parameters passed to WindowPosMESA. The current
				98	color, color index and texture coordinate update the current raster
				99	position's associated data.
				100
Brian Paul	3e07e16	1999-07-20 00:30:41 +0000	[diff] [blame]	101	Additions to the AGL/GLX/WGL Specifications
				102
				103	None
				104
				105	GLX Protocol
				106
				107	Not specified at this time. However, a protocol message very similar
				108	to that of RasterPos is expected.
				109
				110	Errors
				111
				112	INVALID_OPERATION is generated if WindowPosMESA is called betweeen
				113	Begin and End.
				114
Brian Paul	3e07e16	1999-07-20 00:30:41 +0000	[diff] [blame]	115	New State
				116
				117	None.
				118
				119	New Implementation Dependent State
				120
				121	None.
				122
				123	Revision History
				124
				125	* Revision 1.0 - Initial specification
Brian Paul	6132833	2000-01-07 08:47:15 +0000	[diff] [blame]	126	* Revision 1.1 - Minor clean-up (7 Jan 2000, Brian Paul)
				127