WebSVN - shark - Blame - Rev 56 - /shark/trunk/ports/mesa/src/tnl/t_vb

Rev	Author	Line No.	Line
56	pj	1	/* $Id: t_vb_rendertmp.h,v 1.1 2003-02-28 11:48:08 pj Exp $ */
		2
		3	/*
		4	* Mesa 3-D graphics library
		5	* Version: 3.5
		6	*
		7	* Copyright (C) 1999-2001 Brian Paul All Rights Reserved.
		8	*
		9	* Permission is hereby granted, free of charge, to any person obtaining a
		10	* copy of this software and associated documentation files (the "Software"),
		11	* to deal in the Software without restriction, including without limitation
		12	* the rights to use, copy, modify, merge, publish, distribute, sublicense,
		13	* and/or sell copies of the Software, and to permit persons to whom the
		14	* Software is furnished to do so, subject to the following conditions:
		15	*
		16	* The above copyright notice and this permission notice shall be included
		17	* in all copies or substantial portions of the Software.
		18	*
		19	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
		20	* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
		21	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
		22	* BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
		23	* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
		24	* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
		25	*
		26	* Authors:
		27	* Keith Whitwell <keith@tungstengraphics.com>
		28	*/
		29
		30
		31	#ifndef POSTFIX
		32	#define POSTFIX
		33	#endif
		34
		35	#ifndef INIT
		36	#define INIT(x)
		37	#endif
		38
		39	#ifndef NEED_EDGEFLAG_SETUP
		40	#define NEED_EDGEFLAG_SETUP 0
		41	#define EDGEFLAG_GET(a) 0
		42	#define EDGEFLAG_SET(a,b) (void)b
		43	#endif
		44
		45	#ifndef RESET_STIPPLE
		46	#define RESET_STIPPLE
		47	#endif
		48
		49	#ifndef RESET_OCCLUSION
		50	#define RESET_OCCLUSION
		51	#endif
		52
		53	#ifndef TEST_PRIM_END
		54	#define TEST_PRIM_END(flags) (flags & PRIM_END)
		55	#define TEST_PRIM_BEGIN(flags) (flags & PRIM_BEGIN)
		56	#define TEST_PRIM_PARITY(flags) (flags & PRIM_PARITY)
		57	#endif
		58
		59	#ifndef ELT
		60	#define ELT(x) x
		61	#endif
		62
		63	#ifndef RENDER_TAB_QUALIFIER
		64	#define RENDER_TAB_QUALIFIER static
		65	#endif
		66
		67	static void TAG(render_points)( GLcontext *ctx,
		68	GLuint start,
		69	GLuint count,
		70	GLuint flags )
		71	{
		72	LOCAL_VARS;
		73	(void) flags;
		74
		75	RESET_OCCLUSION;
		76	INIT(GL_POINTS);
		77	RENDER_POINTS( start, count );
		78	POSTFIX;
		79	}
		80
		81	static void TAG(render_lines)( GLcontext *ctx,
		82	GLuint start,
		83	GLuint count,
		84	GLuint flags )
		85	{
		86	GLuint j;
		87	LOCAL_VARS;
		88	(void) flags;
		89
		90	RESET_OCCLUSION;
		91	INIT(GL_LINES);
		92	for (j=start+1; j<count; j+=2 ) {
		93	RESET_STIPPLE;
		94	RENDER_LINE( ELT(j-1), ELT(j) );
		95	}
		96	POSTFIX;
		97	}
		98
		99
		100	static void TAG(render_line_strip)( GLcontext *ctx,
		101	GLuint start,
		102	GLuint count,
		103	GLuint flags )
		104	{
		105	GLuint j;
		106	LOCAL_VARS;
		107	(void) flags;
		108
		109	RESET_OCCLUSION;
		110	INIT(GL_LINE_STRIP);
		111
		112	if (TEST_PRIM_BEGIN(flags)) {
		113	RESET_STIPPLE;
		114	}
		115
		116	for (j=start+1; j<count; j++ )
		117	RENDER_LINE( ELT(j-1), ELT(j) );
		118
		119	POSTFIX;
		120	}
		121
		122
		123	static void TAG(render_line_loop)( GLcontext *ctx,
		124	GLuint start,
		125	GLuint count,
		126	GLuint flags )
		127	{
		128	GLuint i;
		129	LOCAL_VARS;
		130
		131	(void) flags;
		132
		133	RESET_OCCLUSION;
		134	INIT(GL_LINE_LOOP);
		135
		136	if (start+1 < count) {
		137	if (TEST_PRIM_BEGIN(flags)) {
		138	RESET_STIPPLE;
		139	RENDER_LINE( ELT(start), ELT(start+1) );
		140	}
		141
		142	for ( i = start+2 ; i < count ; i++) {
		143	RENDER_LINE( ELT(i-1), ELT(i) );
		144	}
		145
		146	if ( TEST_PRIM_END(flags)) {
		147	RENDER_LINE( ELT(count-1), ELT(start) );
		148	}
		149	}
		150
		151	POSTFIX;
		152	}
		153
		154
		155	static void TAG(render_triangles)( GLcontext *ctx,
		156	GLuint start,
		157	GLuint count,
		158	GLuint flags )
		159	{
		160	GLuint j;
		161	LOCAL_VARS;
		162	(void) flags;
		163
		164	INIT(GL_TRIANGLES);
		165	if (NEED_EDGEFLAG_SETUP) {
		166	for (j=start+2; j<count; j+=3) {
		167	/* Leave the edgeflags as supplied by the user.
		168	*/
		169	RESET_STIPPLE;
		170	RENDER_TRI( ELT(j-2), ELT(j-1), ELT(j) );
		171	}
		172	} else {
		173	for (j=start+2; j<count; j+=3) {
		174	RENDER_TRI( ELT(j-2), ELT(j-1), ELT(j) );
		175	}
		176	}
		177	POSTFIX;
		178	}
		179
		180
		181
		182	static void TAG(render_tri_strip)( GLcontext *ctx,
		183	GLuint start,
		184	GLuint count,
		185	GLuint flags )
		186	{
		187	GLuint j;
		188	GLuint parity = 0;
		189	LOCAL_VARS;
		190
		191	if (TEST_PRIM_PARITY(flags))
		192	parity = 1;
		193
		194	INIT(GL_TRIANGLE_STRIP);
		195	if (NEED_EDGEFLAG_SETUP) {
		196	for (j=start+2;j<count;j++,parity^=1) {
		197	GLuint ej2 = ELT(j-2+parity);
		198	GLuint ej1 = ELT(j-1-parity);
		199	GLuint ej = ELT(j);
		200	GLboolean ef2 = EDGEFLAG_GET( ej2 );
		201	GLboolean ef1 = EDGEFLAG_GET( ej1 );
		202	GLboolean ef = EDGEFLAG_GET( ej );
		203	if (TEST_PRIM_BEGIN(flags)) {
		204	RESET_STIPPLE;
		205	}
		206	EDGEFLAG_SET( ej2, GL_TRUE );
		207	EDGEFLAG_SET( ej1, GL_TRUE );
		208	EDGEFLAG_SET( ej, GL_TRUE );
		209	RENDER_TRI( ej2, ej1, ej );
		210	EDGEFLAG_SET( ej2, ef2 );
		211	EDGEFLAG_SET( ej1, ef1 );
		212	EDGEFLAG_SET( ej, ef );
		213	}
		214	} else {
		215	for (j=start+2; j<count ; j++, parity^=1) {
		216	RENDER_TRI( ELT(j-2+parity), ELT(j-1-parity), ELT(j) );
		217	}
		218	}
		219	POSTFIX;
		220	}
		221
		222
		223	static void TAG(render_tri_fan)( GLcontext *ctx,
		224	GLuint start,
		225	GLuint count,
		226	GLuint flags )
		227	{
		228	GLuint j;
		229	LOCAL_VARS;
		230	(void) flags;
		231
		232	INIT(GL_TRIANGLE_FAN);
		233	if (NEED_EDGEFLAG_SETUP) {
		234	for (j=start+2;j<count;j++) {
		235	/* For trifans, all edges are boundary.
		236	*/
		237	GLuint ejs = ELT(start);
		238	GLuint ej1 = ELT(j-1);
		239	GLuint ej = ELT(j);
		240	GLboolean efs = EDGEFLAG_GET( ejs );
		241	GLboolean ef1 = EDGEFLAG_GET( ej1 );
		242	GLboolean ef = EDGEFLAG_GET( ej );
		243	if (TEST_PRIM_BEGIN(flags)) {
		244	RESET_STIPPLE;
		245	}
		246	EDGEFLAG_SET( ejs, GL_TRUE );
		247	EDGEFLAG_SET( ej1, GL_TRUE );
		248	EDGEFLAG_SET( ej, GL_TRUE );
		249	RENDER_TRI( ejs, ej1, ej);
		250	EDGEFLAG_SET( ejs, efs );
		251	EDGEFLAG_SET( ej1, ef1 );
		252	EDGEFLAG_SET( ej, ef );
		253	}
		254	} else {
		255	for (j=start+2;j<count;j++) {
		256	RENDER_TRI( ELT(start), ELT(j-1), ELT(j) );
		257	}
		258	}
		259
		260	POSTFIX;
		261	}
		262
		263
		264	static void TAG(render_poly)( GLcontext *ctx,
		265	GLuint start,
		266	GLuint count,
		267	GLuint flags )
		268	{
		269	GLuint j = start+2;
		270	LOCAL_VARS;
		271	(void) flags;
		272
		273	INIT(GL_POLYGON);
		274	if (NEED_EDGEFLAG_SETUP) {
		275	GLboolean efstart = EDGEFLAG_GET( ELT(start) );
		276	GLboolean efcount = EDGEFLAG_GET( ELT(count-1) );
		277
		278	/* If the primitive does not begin here, the first edge
		279	* is non-boundary.
		280	*/
		281	if (!TEST_PRIM_BEGIN(flags))
		282	EDGEFLAG_SET( ELT(start), GL_FALSE );
		283	else {
		284	RESET_STIPPLE;
		285	}
		286
		287	/* If the primitive does not end here, the final edge is
		288	* non-boundary.
		289	*/
		290	if (!TEST_PRIM_END(flags))
		291	EDGEFLAG_SET( ELT(count-1), GL_FALSE );
		292
		293	/* Draw the first triangles (possibly zero)
		294	*/
		295	if (j+1<count) {
		296	GLboolean ef = EDGEFLAG_GET( ELT(j) );
		297	EDGEFLAG_SET( ELT(j), GL_FALSE );
		298	RENDER_TRI( ELT(j-1), ELT(j), ELT(start) );
		299	EDGEFLAG_SET( ELT(j), ef );
		300	j++;
		301
		302	/* Don't render the first edge again:
		303	*/
		304	EDGEFLAG_SET( ELT(start), GL_FALSE );
		305
		306	for (;j+1<count;j++) {
		307	GLboolean efj = EDGEFLAG_GET( ELT(j) );
		308	EDGEFLAG_SET( ELT(j), GL_FALSE );
		309	RENDER_TRI( ELT(j-1), ELT(j), ELT(start) );
		310	EDGEFLAG_SET( ELT(j), efj );
		311	}
		312	}
		313
		314	/* Draw the last or only triangle
		315	*/
		316	if (j < count)
		317	RENDER_TRI( ELT(j-1), ELT(j), ELT(start) );
		318
		319	/* Restore the first and last edgeflags:
		320	*/
		321	EDGEFLAG_SET( ELT(count-1), efcount );
		322	EDGEFLAG_SET( ELT(start), efstart );
		323
		324	}
		325	else {
		326	for (j=start+2;j<count;j++) {
		327	RENDER_TRI( ELT(j-1), ELT(j), ELT(start) );
		328	}
		329	}
		330	POSTFIX;
		331	}
		332
		333	static void TAG(render_quads)( GLcontext *ctx,
		334	GLuint start,
		335	GLuint count,
		336	GLuint flags )
		337	{
		338	GLuint j;
		339	LOCAL_VARS;
		340	(void) flags;
		341
		342	INIT(GL_QUADS);
		343	if (NEED_EDGEFLAG_SETUP) {
		344	for (j=start+3; j<count; j+=4) {
		345	/* Use user-specified edgeflags for quads.
		346	*/
		347	RESET_STIPPLE;
		348	RENDER_QUAD( ELT(j-3), ELT(j-2), ELT(j-1), ELT(j) );
		349	}
		350	} else {
		351	for (j=start+3; j<count; j+=4) {
		352	RENDER_QUAD( ELT(j-3), ELT(j-2), ELT(j-1), ELT(j) );
		353	}
		354	}
		355	POSTFIX;
		356	}
		357
		358	static void TAG(render_quad_strip)( GLcontext *ctx,
		359	GLuint start,
		360	GLuint count,
		361	GLuint flags )
		362	{
		363	GLuint j;
		364	LOCAL_VARS;
		365	(void) flags;
		366
		367	INIT(GL_QUAD_STRIP);
		368	if (NEED_EDGEFLAG_SETUP) {
		369	for (j=start+3;j<count;j+=2) {
		370	/* All edges are boundary. Set edgeflags to 1, draw the
		371	* quad, and restore them to the original values.
		372	*/
		373	GLboolean ef3 = EDGEFLAG_GET( ELT(j-3) );
		374	GLboolean ef2 = EDGEFLAG_GET( ELT(j-2) );
		375	GLboolean ef1 = EDGEFLAG_GET( ELT(j-1) );
		376	GLboolean ef = EDGEFLAG_GET( ELT(j) );
		377	if (TEST_PRIM_BEGIN(flags)) {
		378	RESET_STIPPLE;
		379	}
		380	EDGEFLAG_SET( ELT(j-3), GL_TRUE );
		381	EDGEFLAG_SET( ELT(j-2), GL_TRUE );
		382	EDGEFLAG_SET( ELT(j-1), GL_TRUE );
		383	EDGEFLAG_SET( ELT(j), GL_TRUE );
		384	RENDER_QUAD( ELT(j-1), ELT(j-3), ELT(j-2), ELT(j) );
		385	EDGEFLAG_SET( ELT(j-3), ef3 );
		386	EDGEFLAG_SET( ELT(j-2), ef2 );
		387	EDGEFLAG_SET( ELT(j-1), ef1 );
		388	EDGEFLAG_SET( ELT(j), ef );
		389	}
		390	} else {
		391	for (j=start+3;j<count;j+=2) {
		392	RENDER_QUAD( ELT(j-1), ELT(j-3), ELT(j-2), ELT(j) );
		393	}
		394	}
		395	POSTFIX;
		396	}
		397
		398	static void TAG(render_noop)( GLcontext *ctx,
		399	GLuint start,
		400	GLuint count,
		401	GLuint flags )
		402	{
		403	(void)(ctx && start && count && flags);
		404	}
		405
		406	RENDER_TAB_QUALIFIER void (TAG(render_tab)[GL_POLYGON+2])(GLcontext ,
		407	GLuint,
		408	GLuint,
		409	GLuint) =
		410	{
		411	TAG(render_points),
		412	TAG(render_lines),
		413	TAG(render_line_loop),
		414	TAG(render_line_strip),
		415	TAG(render_triangles),
		416	TAG(render_tri_strip),
		417	TAG(render_tri_fan),
		418	TAG(render_quads),
		419	TAG(render_quad_strip),
		420	TAG(render_poly),
		421	TAG(render_noop),
		422	};
		423
		424
		425
		426	#ifndef PRESERVE_VB_DEFS
		427	#undef RENDER_TRI
		428	#undef RENDER_QUAD
		429	#undef RENDER_LINE
		430	#undef RENDER_POINTS
		431	#undef LOCAL_VARS
		432	#undef INIT
		433	#undef POSTFIX
		434	#undef RESET_STIPPLE
		435	#undef DBG
		436	#undef ELT
		437	#undef RENDER_TAB_QUALIFIER
		438	#endif
		439
		440	#ifndef PRESERVE_TAG
		441	#undef TAG
		442	#endif
		443
		444	#undef PRESERVE_VB_DEFS
		445	#undef PRESERVE_TAG

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(root)/shark/trunk/ports/mesa/src/tnl/t_vb_rendertmp.h - Rev 56