WebSVN - shark - Blame - Rev 1618 - /shark/branches/xen/ports/mesa/src/tnl/t_vb

Rev	Author	Line No.	Line
72	giacomo	1	/* $Id: t_vb_lighttmp.h,v 1.2 2003-03-13 12:20:29 giacomo Exp $ */
56	pj	2
		3	/*
		4	* Mesa 3-D graphics library
		5	* Version: 4.1
		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	*
		27	* Authors:
		28	* Brian Paul
		29	* Keith Whitwell <keith@tungstengraphics.com>
		30	*/
		31
		32
		33	#if (IDX & LIGHT_FLAGS)
		34	# define VSTRIDE (4 * sizeof(GLfloat))
		35	# define NSTRIDE nstride /(3 sizeof(GLfloat))*/
		36	# define CHECK_MATERIAL(x) (flags[x] & VERT_BIT_MATERIAL)
		37	# define CHECK_END_VB(x) (flags[x] & VERT_BIT_END_VB)
		38	# if (IDX & LIGHT_COLORMATERIAL)
		39	# define CMSTRIDE STRIDE_F(CMcolor, CMstride)
		40	# define CHECK_COLOR_MATERIAL(x) (flags[x] & VERT_BIT_COLOR0)
		41	# define CHECK_VALIDATE(x) (flags[x] & (VERT_BIT_COLOR0\|VERT_BIT_MATERIAL))
		42	# define DO_ANOTHER_NORMAL(x) \
		43	((flags[x] & (VERT_BIT_COLOR0\|VERT_BIT_NORMAL\|VERT_BIT_END_VB\|VERT_BIT_MATERIAL)) == VERT_BIT_NORMAL)
		44	# define REUSE_LIGHT_RESULTS(x) \
		45	((flags[x] & (VERT_BIT_COLOR0\|VERT_BIT_NORMAL\|VERT_BIT_END_VB\|VERT_BIT_MATERIAL)) == 0)
		46	# else
		47	# define CMSTRIDE (void)0
		48	# define CHECK_COLOR_MATERIAL(x) 0
		49	# define CHECK_VALIDATE(x) (flags[x] & (VERT_BIT_MATERIAL))
		50	# define DO_ANOTHER_NORMAL(x) \
		51	((flags[x] & (VERT_BIT_NORMAL\|VERT_BIT_END_VB\|VERT_BIT_MATERIAL)) == VERT_BIT_NORMAL)
		52	# define REUSE_LIGHT_RESULTS(x) \
		53	((flags[x] & (VERT_BIT_NORMAL\|VERT_BIT_END_VB\|VERT_BIT_MATERIAL)) == 0)
		54	# endif
		55	#else
		56	# define VSTRIDE vstride
		57	# define NSTRIDE nstride
		58	# define CHECK_MATERIAL(x) 0 /* no materials on array paths */
		59	# define CHECK_END_VB(XX) (XX >= nr)
		60	# if (IDX & LIGHT_COLORMATERIAL)
		61	# define CMSTRIDE STRIDE_F(CMcolor, CMstride)
		62	# define CHECK_COLOR_MATERIAL(x) (x < nr) /* always have colormaterial */
		63	# define CHECK_VALIDATE(x) (x < nr)
		64	# define DO_ANOTHER_NORMAL(x) 0 /* always stop to recalc colormat */
		65	# else
		66	# define CMSTRIDE (void)0
		67	# define CHECK_COLOR_MATERIAL(x) 0 /* no colormaterial */
		68	# define CHECK_VALIDATE(x) (0)
		69	# define DO_ANOTHER_NORMAL(XX) (XX < nr) /* keep going to end of vb */
		70	# endif
		71	# define REUSE_LIGHT_RESULTS(x) 0 /* always have a new normal */
		72	#endif
		73
		74
		75
		76	#if (IDX & LIGHT_TWOSIDE)
		77	# define NR_SIDES 2
		78	#else
		79	# define NR_SIDES 1
		80	#endif
		81
		82
		83	/* define TRACE if to trace lighting code */
		84
		85
		86	/*
		87	* ctx is the current context
		88	* VB is the vertex buffer
		89	* stage is the lighting stage-private data
		90	* input is the vector of eye or object-space vertex coordinates
		91	*/
		92	static void TAG(light_rgba_spec)( GLcontext *ctx,
		93	struct vertex_buffer *VB,
		94	struct gl_pipeline_stage *stage,
		95	GLvector4f *input )
		96	{
		97	struct light_stage_data *store = LIGHT_STAGE_DATA(stage);
		98	GLfloat (*base)[3] = ctx->Light._BaseColor;
		99	GLchan sumA[2];
		100	GLuint j;
		101
		102	const GLuint vstride = input->stride;
		103	const GLfloat vertex = (GLfloat )input->data;
		104	const GLuint nstride = VB->NormalPtr->stride;
		105	const GLfloat normal = (GLfloat )VB->NormalPtr->data;
		106
		107	GLfloat *CMcolor;
		108	GLuint CMstride;
		109
		110	GLchan (Fcolor)[4] = (GLchan ()[4]) store->LitColor[0].Ptr;
		111	GLchan (Bcolor)[4] = (GLchan ()[4]) store->LitColor[1].Ptr;
		112	GLchan (Fspec)[4] = (GLchan ()[4]) store->LitSecondary[0].Ptr;
		113	GLchan (Bspec)[4] = (GLchan ()[4]) store->LitSecondary[1].Ptr;
		114
		115	const GLuint nr = VB->Count;
		116	const GLuint *flags = VB->Flag;
		117	struct gl_material (*new_material)[2] = VB->Material;
		118	const GLuint *new_material_mask = VB->MaterialMask;
		119
		120	(void) flags;
		121	(void) nstride;
		122	(void) vstride;
		123
		124	#ifdef TRACE
72	giacomo	125	cprintf("%s\n", __FUNCTION__ );
56	pj	126	#endif
		127
		128	if (IDX & LIGHT_COLORMATERIAL) {
		129	if (VB->ColorPtr[0]->Type != GL_FLOAT \|\|
		130	VB->ColorPtr[0]->Size != 4)
		131	import_color_material( ctx, stage );
		132
		133	CMcolor = (GLfloat *) VB->ColorPtr[0]->Ptr;
		134	CMstride = VB->ColorPtr[0]->StrideB;
		135	}
		136
		137	VB->ColorPtr[0] = &store->LitColor[0];
		138	VB->SecondaryColorPtr[0] = &store->LitSecondary[0];
		139	UNCLAMPED_FLOAT_TO_CHAN(sumA[0], ctx->Light.Material[0].Diffuse[3]);
		140
		141	if (IDX & LIGHT_TWOSIDE) {
		142	VB->ColorPtr[1] = &store->LitColor[1];
		143	VB->SecondaryColorPtr[1] = &store->LitSecondary[1];
		144	UNCLAMPED_FLOAT_TO_CHAN(sumA[1], ctx->Light.Material[1].Diffuse[3]);
		145	}
		146
		147	/* Side-effects done, can we finish now?
		148	*/
		149	if (stage->changed_inputs == 0)
		150	return;
		151
		152	for ( j=0 ;
		153	j<nr ;
		154	j++,STRIDE_F(vertex,VSTRIDE),STRIDE_F(normal,NSTRIDE),CMSTRIDE)
		155	{
		156	GLfloat sum[2][3], spec[2][3];
		157	struct gl_light *light;
		158
		159	if ( CHECK_COLOR_MATERIAL(j) )
		160	_mesa_update_color_material( ctx, CMcolor );
		161
		162	if ( CHECK_MATERIAL(j) )
		163	_mesa_update_material( ctx, new_material[j], new_material_mask[j] );
		164
		165	if ( CHECK_VALIDATE(j) ) {
		166	TNL_CONTEXT(ctx)->Driver.NotifyMaterialChange( ctx );
		167	UNCLAMPED_FLOAT_TO_CHAN(sumA[0], ctx->Light.Material[0].Diffuse[3]);
		168	if (IDX & LIGHT_TWOSIDE)
		169	UNCLAMPED_FLOAT_TO_CHAN(sumA[1], ctx->Light.Material[1].Diffuse[3]);
		170	}
		171
		172	COPY_3V(sum[0], base[0]);
		173	ZERO_3V(spec[0]);
		174
		175	if (IDX & LIGHT_TWOSIDE) {
		176	COPY_3V(sum[1], base[1]);
		177	ZERO_3V(spec[1]);
		178	}
		179
		180	/* Add contribution from each enabled light source */
		181	foreach (light, &ctx->Light.EnabledList) {
		182	GLfloat n_dot_h;
		183	GLfloat correction;
		184	GLint side;
		185	GLfloat contrib[3];
		186	GLfloat attenuation;
		187	GLfloat VP[3]; /* unit vector from vertex to light */
		188	GLfloat n_dot_VP; /* n dot VP */
		189	GLfloat *h;
		190
		191	/* compute VP and attenuation */
		192	if (!(light->_Flags & LIGHT_POSITIONAL)) {
		193	/* directional light */
		194	COPY_3V(VP, light->_VP_inf_norm);
		195	attenuation = light->_VP_inf_spot_attenuation;
		196	}
		197	else {
		198	GLfloat d; /* distance from vertex to light */
		199
		200	SUB_3V(VP, light->_Position, vertex);
		201
		202	d = (GLfloat) LEN_3FV( VP );
		203
		204	if (d > 1e-6) {
		205	GLfloat invd = 1.0F / d;
		206	SELF_SCALE_SCALAR_3V(VP, invd);
		207	}
		208
		209	attenuation = 1.0F / (light->ConstantAttenuation + d *
		210	(light->LinearAttenuation + d *
		211	light->QuadraticAttenuation));
		212
		213	/* spotlight attenuation */
		214	if (light->_Flags & LIGHT_SPOT) {
		215	GLfloat PV_dot_dir = - DOT3(VP, light->_NormDirection);
		216
		217	if (PV_dot_dir<light->_CosCutoff) {
		218	continue; /* this light makes no contribution */
		219	}
		220	else {
		221	GLdouble x = PV_dot_dir * (EXP_TABLE_SIZE-1);
		222	GLint k = (GLint) x;
		223	GLfloat spot = (GLfloat) (light->_SpotExpTable[k][0]
		224	+ (x-k)*light->_SpotExpTable[k][1]);
		225	attenuation *= spot;
		226	}
		227	}
		228	}
		229
		230	if (attenuation < 1e-3)
		231	continue; /* this light makes no contribution */
		232
		233	/* Compute dot product or normal and vector from V to light pos */
		234	n_dot_VP = DOT3( normal, VP );
		235
		236	/* Which side gets the diffuse & specular terms? */
		237	if (n_dot_VP < 0.0F) {
		238	ACC_SCALE_SCALAR_3V(sum[0], attenuation, light->_MatAmbient[0]);
		239	if (!(IDX & LIGHT_TWOSIDE)) {
		240	continue;
		241	}
		242	side = 1;
		243	correction = -1;
		244	n_dot_VP = -n_dot_VP;
		245	}
		246	else {
		247	if (IDX & LIGHT_TWOSIDE) {
		248	ACC_SCALE_SCALAR_3V( sum[1], attenuation, light->_MatAmbient[1]);
		249	}
		250	side = 0;
		251	correction = 1;
		252	}
		253
		254	/* diffuse term */
		255	COPY_3V(contrib, light->_MatAmbient[side]);
		256	ACC_SCALE_SCALAR_3V(contrib, n_dot_VP, light->_MatDiffuse[side]);
		257	ACC_SCALE_SCALAR_3V(sum[side], attenuation, contrib );
		258
		259	/* specular term - cannibalize VP... */
		260	if (ctx->Light.Model.LocalViewer) {
		261	GLfloat v[3];
		262	COPY_3V(v, vertex);
		263	NORMALIZE_3FV(v);
		264	SUB_3V(VP, VP, v); /* h = VP + VPe */
		265	h = VP;
		266	NORMALIZE_3FV(h);
		267	}
		268	else if (light->_Flags & LIGHT_POSITIONAL) {
		269	h = VP;
		270	ACC_3V(h, ctx->_EyeZDir);
		271	NORMALIZE_3FV(h);
		272	}
		273	else {
		274	h = light->_h_inf_norm;
		275	}
		276
		277	n_dot_h = correction * DOT3(normal, h);
		278
		279	if (n_dot_h > 0.0F) {
		280	GLfloat spec_coef;
		281	struct gl_shine_tab *tab = ctx->_ShineTable[side];
		282	GET_SHINE_TAB_ENTRY( tab, n_dot_h, spec_coef );
		283
		284	if (spec_coef > 1.0e-10) {
		285	spec_coef *= attenuation;
		286	ACC_SCALE_SCALAR_3V( spec[side], spec_coef,
		287	light->_MatSpecular[side]);
		288	}
		289	}
		290	} /loop over lights/
		291
		292	UNCLAMPED_FLOAT_TO_RGB_CHAN( Fcolor[j], sum[0] );
		293	UNCLAMPED_FLOAT_TO_RGB_CHAN( Fspec[j], spec[0] );
		294	Fcolor[j][3] = sumA[0];
		295
		296	if (IDX & LIGHT_TWOSIDE) {
		297	UNCLAMPED_FLOAT_TO_RGB_CHAN( Bcolor[j], sum[1] );
		298	UNCLAMPED_FLOAT_TO_RGB_CHAN( Bspec[j], spec[1] );
		299	Bcolor[j][3] = sumA[1];
		300	}
		301	}
		302	}
		303
		304
		305	static void TAG(light_rgba)( GLcontext *ctx,
		306	struct vertex_buffer *VB,
		307	struct gl_pipeline_stage *stage,
		308	GLvector4f *input )
		309	{
		310	struct light_stage_data *store = LIGHT_STAGE_DATA(stage);
		311	GLuint j;
		312
		313	GLfloat (*base)[3] = ctx->Light._BaseColor;
		314	GLchan sumA[2];
		315
		316	const GLuint vstride = input->stride;
		317	const GLfloat vertex = (GLfloat ) input->data;
		318	const GLuint nstride = VB->NormalPtr->stride;
		319	const GLfloat normal = (GLfloat )VB->NormalPtr->data;
		320
		321	GLfloat *CMcolor;
		322	GLuint CMstride;
		323
		324	GLchan (Fcolor)[4] = (GLchan ()[4]) store->LitColor[0].Ptr;
		325	GLchan (Bcolor)[4] = (GLchan ()[4]) store->LitColor[1].Ptr;
		326	GLchan (*color[2])[4];
		327	const GLuint *flags = VB->Flag;
		328
		329	struct gl_material (*new_material)[2] = VB->Material;
		330	const GLuint *new_material_mask = VB->MaterialMask;
		331	const GLuint nr = VB->Count;
		332
		333	#ifdef TRACE
72	giacomo	334	cprintf("%s\n", __FUNCTION__ );
56	pj	335	#endif
		336
		337	(void) flags;
		338	(void) nstride;
		339	(void) vstride;
		340
		341	color[0] = Fcolor;
		342	color[1] = Bcolor;
		343
		344	if (IDX & LIGHT_COLORMATERIAL) {
		345	if (VB->ColorPtr[0]->Type != GL_FLOAT \|\|
		346	VB->ColorPtr[0]->Size != 4)
		347	import_color_material( ctx, stage );
		348
		349	CMcolor = (GLfloat *)VB->ColorPtr[0]->Ptr;
		350	CMstride = VB->ColorPtr[0]->StrideB;
		351	}
		352
		353	VB->ColorPtr[0] = &store->LitColor[0];
		354	UNCLAMPED_FLOAT_TO_CHAN(sumA[0], ctx->Light.Material[0].Diffuse[3]);
		355
		356	if (IDX & LIGHT_TWOSIDE) {
		357	VB->ColorPtr[1] = &store->LitColor[1];
		358	UNCLAMPED_FLOAT_TO_CHAN(sumA[1], ctx->Light.Material[1].Diffuse[3]);
		359	}
		360
		361	if (stage->changed_inputs == 0)
		362	return;
		363
		364	for ( j=0 ;
		365	j<nr ;
		366	j++,STRIDE_F(vertex,VSTRIDE), STRIDE_F(normal,NSTRIDE),CMSTRIDE)
		367	{
		368	GLfloat sum[2][3];
		369	struct gl_light *light;
		370
		371	if ( CHECK_COLOR_MATERIAL(j) )
		372	_mesa_update_color_material( ctx, CMcolor );
		373
		374	if ( CHECK_MATERIAL(j) )
		375	_mesa_update_material( ctx, new_material[j], new_material_mask[j] );
		376
		377	if ( CHECK_VALIDATE(j) ) {
		378	TNL_CONTEXT(ctx)->Driver.NotifyMaterialChange( ctx );
		379	UNCLAMPED_FLOAT_TO_CHAN(sumA[0], ctx->Light.Material[0].Diffuse[3]);
		380	if (IDX & LIGHT_TWOSIDE)
		381	UNCLAMPED_FLOAT_TO_CHAN(sumA[1], ctx->Light.Material[1].Diffuse[3]);
		382	}
		383
		384	COPY_3V(sum[0], base[0]);
		385
		386	if ( IDX & LIGHT_TWOSIDE )
		387	COPY_3V(sum[1], base[1]);
		388
		389	/* Add contribution from each enabled light source */
		390	foreach (light, &ctx->Light.EnabledList) {
		391
		392	GLfloat n_dot_h;
		393	GLfloat correction;
		394	GLint side;
		395	GLfloat contrib[3];
		396	GLfloat attenuation = 1.0;
		397	GLfloat VP[3]; /* unit vector from vertex to light */
		398	GLfloat n_dot_VP; /* n dot VP */
		399	GLfloat *h;
		400
		401	/* compute VP and attenuation */
		402	if (!(light->_Flags & LIGHT_POSITIONAL)) {
		403	/* directional light */
		404	COPY_3V(VP, light->_VP_inf_norm);
		405	attenuation = light->_VP_inf_spot_attenuation;
		406	}
		407	else {
		408	GLfloat d; /* distance from vertex to light */
		409
		410
		411	SUB_3V(VP, light->_Position, vertex);
		412
		413	d = (GLfloat) LEN_3FV( VP );
		414
		415	if ( d > 1e-6) {
		416	GLfloat invd = 1.0F / d;
		417	SELF_SCALE_SCALAR_3V(VP, invd);
		418	}
		419
		420	attenuation = 1.0F / (light->ConstantAttenuation + d *
		421	(light->LinearAttenuation + d *
		422	light->QuadraticAttenuation));
		423
		424	/* spotlight attenuation */
		425	if (light->_Flags & LIGHT_SPOT) {
		426	GLfloat PV_dot_dir = - DOT3(VP, light->_NormDirection);
		427
		428	if (PV_dot_dir<light->_CosCutoff) {
		429	continue; /* this light makes no contribution */
		430	}
		431	else {
		432	GLdouble x = PV_dot_dir * (EXP_TABLE_SIZE-1);
		433	GLint k = (GLint) x;
		434	GLfloat spot = (GLfloat) (light->_SpotExpTable[k][0]
		435	+ (x-k)*light->_SpotExpTable[k][1]);
		436	attenuation *= spot;
		437	}
		438	}
		439	}
		440
		441	if (attenuation < 1e-3)
		442	continue; /* this light makes no contribution */
		443
		444	/* Compute dot product or normal and vector from V to light pos */
		445	n_dot_VP = DOT3( normal, VP );
		446
		447	/* which side are we lighting? */
		448	if (n_dot_VP < 0.0F) {
		449	ACC_SCALE_SCALAR_3V(sum[0], attenuation, light->_MatAmbient[0]);
		450
		451	if (!(IDX & LIGHT_TWOSIDE))
		452	continue;
		453
		454	side = 1;
		455	correction = -1;
		456	n_dot_VP = -n_dot_VP;
		457	}
		458	else {
		459	if (IDX & LIGHT_TWOSIDE) {
		460	ACC_SCALE_SCALAR_3V( sum[1], attenuation, light->_MatAmbient[1]);
		461	}
		462	side = 0;
		463	correction = 1;
		464	}
		465
		466	COPY_3V(contrib, light->_MatAmbient[side]);
		467
		468	/* diffuse term */
		469	ACC_SCALE_SCALAR_3V(contrib, n_dot_VP, light->_MatDiffuse[side]);
		470
		471	/* specular term - cannibalize VP... */
		472	{
		473	if (ctx->Light.Model.LocalViewer) {
		474	GLfloat v[3];
		475	COPY_3V(v, vertex);
		476	NORMALIZE_3FV(v);
		477	SUB_3V(VP, VP, v); /* h = VP + VPe */
		478	h = VP;
		479	NORMALIZE_3FV(h);
		480	}
		481	else if (light->_Flags & LIGHT_POSITIONAL) {
		482	h = VP;
		483	ACC_3V(h, ctx->_EyeZDir);
		484	NORMALIZE_3FV(h);
		485	}
		486	else {
		487	h = light->_h_inf_norm;
		488	}
		489
		490	n_dot_h = correction * DOT3(normal, h);
		491
		492	if (n_dot_h > 0.0F)
		493	{
		494	GLfloat spec_coef;
		495	struct gl_shine_tab *tab = ctx->_ShineTable[side];
		496
		497	GET_SHINE_TAB_ENTRY( tab, n_dot_h, spec_coef );
		498
		499	ACC_SCALE_SCALAR_3V( contrib, spec_coef,
		500	light->_MatSpecular[side]);
		501	}
		502	}
		503
		504	ACC_SCALE_SCALAR_3V( sum[side], attenuation, contrib );
		505	}
		506
		507	UNCLAMPED_FLOAT_TO_RGB_CHAN( Fcolor[j], sum[0] );
		508	Fcolor[j][3] = sumA[0];
		509
		510	if (IDX & LIGHT_TWOSIDE) {
		511	UNCLAMPED_FLOAT_TO_RGB_CHAN( Bcolor[j], sum[1] );
		512	Bcolor[j][3] = sumA[1];
		513	}
		514	}
		515	}
		516
		517
		518
		519
		520	/* As below, but with just a single light.
		521	*/
		522	static void TAG(light_fast_rgba_single)( GLcontext *ctx,
		523	struct vertex_buffer *VB,
		524	struct gl_pipeline_stage *stage,
		525	GLvector4f *input )
		526
		527	{
		528	struct light_stage_data *store = LIGHT_STAGE_DATA(stage);
		529	const GLuint nstride = VB->NormalPtr->stride;
		530	const GLfloat normal = (GLfloat )VB->NormalPtr->data;
		531	GLfloat *CMcolor;
		532	GLuint CMstride;
		533	GLchan (Fcolor)[4] = (GLchan ()[4]) store->LitColor[0].Ptr;
		534	GLchan (Bcolor)[4] = (GLchan ()[4]) store->LitColor[1].Ptr;
		535	const struct gl_light *light = ctx->Light.EnabledList.next;
		536	const GLuint *flags = VB->Flag;
		537	GLchan basechan[2][4];
		538	GLuint j = 0;
		539	struct gl_material (*new_material)[2] = VB->Material;
		540	const GLuint *new_material_mask = VB->MaterialMask;
		541	GLfloat base[2][3];
		542	const GLuint nr = VB->Count;
		543
		544	#ifdef TRACE
72	giacomo	545	cprintf("%s\n", __FUNCTION__ );
56	pj	546	#endif
		547
		548	(void) input; /* doesn't refer to Eye or Obj */
		549	(void) flags;
		550	(void) nr;
		551	(void) nstride;
		552
		553	if (IDX & LIGHT_COLORMATERIAL) {
		554	if (VB->ColorPtr[0]->Type != GL_FLOAT \|\|
		555	VB->ColorPtr[0]->Size != 4)
		556	import_color_material( ctx, stage );
		557
		558	CMcolor = (GLfloat *)VB->ColorPtr[0]->Ptr;
		559	CMstride = VB->ColorPtr[0]->StrideB;
		560	}
		561
		562	VB->ColorPtr[0] = &store->LitColor[0];
		563	if (IDX & LIGHT_TWOSIDE)
		564	VB->ColorPtr[1] = &store->LitColor[1];
		565
		566	if (stage->changed_inputs == 0)
		567	return;
		568
		569	do {
		570
		571	if ( CHECK_COLOR_MATERIAL(j) ) {
		572	_mesa_update_color_material( ctx, CMcolor );
		573	}
		574
		575	if ( CHECK_MATERIAL(j) )
		576	_mesa_update_material( ctx, new_material[j], new_material_mask[j] );
		577
		578	if ( CHECK_VALIDATE(j) )
		579	TNL_CONTEXT(ctx)->Driver.NotifyMaterialChange( ctx );
		580
		581
		582	/* No attenuation, so incoporate _MatAmbient into base color.
		583	*/
		584	COPY_3V(base[0], light->_MatAmbient[0]);
		585	ACC_3V(base[0], ctx->Light._BaseColor[0] );
		586	UNCLAMPED_FLOAT_TO_RGB_CHAN( basechan[0], base[0] );
		587	UNCLAMPED_FLOAT_TO_CHAN(basechan[0][3],
		588	ctx->Light.Material[0].Diffuse[3]);
		589
		590	if (IDX & LIGHT_TWOSIDE) {
		591	COPY_3V(base[1], light->_MatAmbient[1]);
		592	ACC_3V(base[1], ctx->Light._BaseColor[1]);
		593	UNCLAMPED_FLOAT_TO_RGB_CHAN( basechan[1], base[1]);
		594	UNCLAMPED_FLOAT_TO_CHAN(basechan[1][3],
		595	ctx->Light.Material[1].Diffuse[3]);
		596	}
		597
		598	do {
		599	GLfloat n_dot_VP = DOT3(normal, light->_VP_inf_norm);
		600
		601	if (n_dot_VP < 0.0F) {
		602	if (IDX & LIGHT_TWOSIDE) {
		603	GLfloat n_dot_h = -DOT3(normal, light->_h_inf_norm);
		604	GLfloat sum[3];
		605	COPY_3V(sum, base[1]);
		606	ACC_SCALE_SCALAR_3V(sum, -n_dot_VP, light->_MatDiffuse[1]);
		607	if (n_dot_h > 0.0F) {
		608	GLfloat spec;
		609	GET_SHINE_TAB_ENTRY( ctx->_ShineTable[1], n_dot_h, spec );
		610	ACC_SCALE_SCALAR_3V(sum, spec, light->_MatSpecular[1]);
		611	}
		612	UNCLAMPED_FLOAT_TO_RGB_CHAN(Bcolor[j], sum );
		613	Bcolor[j][3] = basechan[1][3];
		614	}
		615	COPY_CHAN4(Fcolor[j], basechan[0]);
		616	}
		617	else {
		618	GLfloat n_dot_h = DOT3(normal, light->_h_inf_norm);
		619	GLfloat sum[3];
		620	COPY_3V(sum, base[0]);
		621	ACC_SCALE_SCALAR_3V(sum, n_dot_VP, light->_MatDiffuse[0]);
		622	if (n_dot_h > 0.0F) {
		623	GLfloat spec;
		624	GET_SHINE_TAB_ENTRY( ctx->_ShineTable[0], n_dot_h, spec );
		625	ACC_SCALE_SCALAR_3V(sum, spec, light->_MatSpecular[0]);
		626
		627	}
		628	UNCLAMPED_FLOAT_TO_RGB_CHAN(Fcolor[j], sum );
		629	Fcolor[j][3] = basechan[0][3];
		630	if (IDX & LIGHT_TWOSIDE) COPY_CHAN4(Bcolor[j], basechan[1]);
		631	}
		632
		633	j++;
		634	CMSTRIDE;
		635	STRIDE_F(normal, NSTRIDE);
		636	} while (DO_ANOTHER_NORMAL(j));
		637
		638
		639	for ( ; REUSE_LIGHT_RESULTS(j) ; j++, CMSTRIDE, STRIDE_F(normal,NSTRIDE))
		640	{
		641	COPY_CHAN4(Fcolor[j], Fcolor[j-1]);
		642	if (IDX & LIGHT_TWOSIDE)
		643	COPY_CHAN4(Bcolor[j], Bcolor[j-1]);
		644	}
		645
		646	} while (!CHECK_END_VB(j));
		647	}
		648
		649
		650	/* Light infinite lights
		651	*/
		652	static void TAG(light_fast_rgba)( GLcontext *ctx,
		653	struct vertex_buffer *VB,
		654	struct gl_pipeline_stage *stage,
		655	GLvector4f *input )
		656	{
		657	struct light_stage_data *store = LIGHT_STAGE_DATA(stage);
		658	GLchan sumA[2];
		659	const GLuint nstride = VB->NormalPtr->stride;
		660	const GLfloat normal = (GLfloat )VB->NormalPtr->data;
		661	GLfloat *CMcolor;
		662	GLuint CMstride;
		663	GLchan (Fcolor)[4] = (GLchan ()[4]) store->LitColor[0].Ptr;
		664	GLchan (Bcolor)[4] = (GLchan ()[4]) store->LitColor[1].Ptr;
		665	const GLuint *flags = VB->Flag;
		666	GLuint j = 0;
		667	struct gl_material (*new_material)[2] = VB->Material;
		668	GLuint *new_material_mask = VB->MaterialMask;
		669	const GLuint nr = VB->Count;
		670	const struct gl_light *light;
		671
		672	#ifdef TRACE
72	giacomo	673	cprintf("%s\n", __FUNCTION__ );
56	pj	674	#endif
		675
		676	(void) flags;
		677	(void) input;
		678	(void) nr;
		679	(void) nstride;
		680
		681	UNCLAMPED_FLOAT_TO_CHAN(sumA[0], ctx->Light.Material[0].Diffuse[3]);
		682	UNCLAMPED_FLOAT_TO_CHAN(sumA[1], ctx->Light.Material[1].Diffuse[3]);
		683
		684	if (IDX & LIGHT_COLORMATERIAL) {
		685	if (VB->ColorPtr[0]->Type != GL_FLOAT \|\|
		686	VB->ColorPtr[0]->Size != 4)
		687	import_color_material( ctx, stage );
		688
		689	CMcolor = (GLfloat *)VB->ColorPtr[0]->Ptr;
		690	CMstride = VB->ColorPtr[0]->StrideB;
		691	}
		692
		693	VB->ColorPtr[0] = &store->LitColor[0];
		694	if (IDX & LIGHT_TWOSIDE)
		695	VB->ColorPtr[1] = &store->LitColor[1];
		696
		697	if (stage->changed_inputs == 0)
		698	return;
		699
		700	do {
		701	do {
		702	GLfloat sum[2][3];
		703
		704	if ( CHECK_COLOR_MATERIAL(j) )
		705	_mesa_update_color_material( ctx, CMcolor );
		706
		707	if ( CHECK_MATERIAL(j) )
		708	_mesa_update_material( ctx, new_material[j], new_material_mask[j] );
		709
		710	if ( CHECK_VALIDATE(j) ) {
		711	TNL_CONTEXT(ctx)->Driver.NotifyMaterialChange( ctx );
		712	UNCLAMPED_FLOAT_TO_CHAN(sumA[0], ctx->Light.Material[0].Diffuse[3]);
		713	if (IDX & LIGHT_TWOSIDE)
		714	UNCLAMPED_FLOAT_TO_CHAN(sumA[1],
		715	ctx->Light.Material[1].Diffuse[3]);
		716	}
		717
		718
		719	COPY_3V(sum[0], ctx->Light._BaseColor[0]);
		720	if (IDX & LIGHT_TWOSIDE)
		721	COPY_3V(sum[1], ctx->Light._BaseColor[1]);
		722
		723	foreach (light, &ctx->Light.EnabledList) {
		724	GLfloat n_dot_h, n_dot_VP, spec;
		725
		726	ACC_3V(sum[0], light->_MatAmbient[0]);
		727	if (IDX & LIGHT_TWOSIDE)
		728	ACC_3V(sum[1], light->_MatAmbient[1]);
		729
		730	n_dot_VP = DOT3(normal, light->_VP_inf_norm);
		731
		732	if (n_dot_VP > 0.0F) {
		733	ACC_SCALE_SCALAR_3V(sum[0], n_dot_VP, light->_MatDiffuse[0]);
		734	n_dot_h = DOT3(normal, light->_h_inf_norm);
		735	if (n_dot_h > 0.0F) {
		736	struct gl_shine_tab *tab = ctx->_ShineTable[0];
		737	GET_SHINE_TAB_ENTRY( tab, n_dot_h, spec );
		738	ACC_SCALE_SCALAR_3V( sum[0], spec,
		739	light->_MatSpecular[0]);
		740	}
		741	}
		742	else if (IDX & LIGHT_TWOSIDE) {
		743	ACC_SCALE_SCALAR_3V(sum[1], -n_dot_VP, light->_MatDiffuse[1]);
		744	n_dot_h = -DOT3(normal, light->_h_inf_norm);
		745	if (n_dot_h > 0.0F) {
		746	struct gl_shine_tab *tab = ctx->_ShineTable[1];
		747	GET_SHINE_TAB_ENTRY( tab, n_dot_h, spec );
		748	ACC_SCALE_SCALAR_3V( sum[1], spec,
		749	light->_MatSpecular[1]);
		750	}
		751	}
		752	}
		753
		754	UNCLAMPED_FLOAT_TO_RGB_CHAN( Fcolor[j], sum[0] );
		755	Fcolor[j][3] = sumA[0];
		756
		757	if (IDX & LIGHT_TWOSIDE) {
		758	UNCLAMPED_FLOAT_TO_RGB_CHAN( Bcolor[j], sum[1] );
		759	Bcolor[j][3] = sumA[1];
		760	}
		761
		762	j++;
		763	CMSTRIDE;
		764	STRIDE_F(normal, NSTRIDE);
		765	} while (DO_ANOTHER_NORMAL(j));
		766
		767	/* Reuse the shading results while there is no change to
		768	* normal or material values.
		769	*/
		770	for ( ; REUSE_LIGHT_RESULTS(j) ; j++, CMSTRIDE, STRIDE_F(normal, NSTRIDE))
		771	{
		772	COPY_CHAN4(Fcolor[j], Fcolor[j-1]);
		773	if (IDX & LIGHT_TWOSIDE)
		774	COPY_CHAN4(Bcolor[j], Bcolor[j-1]);
		775	}
		776
		777	} while (!CHECK_END_VB(j));
		778	}
		779
		780
		781
		782
		783
		784	/*
		785	* Use current lighting/material settings to compute the color indexes
		786	* for an array of vertices.
		787	* Input: n - number of vertices to light
		788	* side - 0=use front material, 1=use back material
		789	* vertex - array of [n] vertex position in eye coordinates
		790	* normal - array of [n] surface normal vector
		791	* Output: indexResult - resulting array of [n] color indexes
		792	*/
		793	static void TAG(light_ci)( GLcontext *ctx,
		794	struct vertex_buffer *VB,
		795	struct gl_pipeline_stage *stage,
		796	GLvector4f *input )
		797	{
		798	struct light_stage_data *store = LIGHT_STAGE_DATA(stage);
		799	GLuint j;
		800	const GLuint vstride = input->stride;
		801	const GLfloat vertex = (GLfloat ) input->data;
		802	const GLuint nstride = VB->NormalPtr->stride;
		803	const GLfloat normal = (GLfloat )VB->NormalPtr->data;
		804	GLfloat *CMcolor;
		805	GLuint CMstride;
		806	const GLuint *flags = VB->Flag;
		807	GLuint *indexResult[2];
		808	struct gl_material (*new_material)[2] = VB->Material;
		809	GLuint *new_material_mask = VB->MaterialMask;
		810	const GLuint nr = VB->Count;
		811
		812	#ifdef TRACE
72	giacomo	813	cprintf("%s\n", __FUNCTION__ );
56	pj	814	#endif
		815
		816	(void) flags;
		817	(void) nstride;
		818	(void) vstride;
		819
		820	VB->IndexPtr[0] = &store->LitIndex[0];
		821	if (IDX & LIGHT_TWOSIDE)
		822	VB->IndexPtr[1] = &store->LitIndex[1];
		823
		824	if (stage->changed_inputs == 0)
		825	return;
		826
		827	indexResult[0] = VB->IndexPtr[0]->data;
		828	if (IDX & LIGHT_TWOSIDE)
		829	indexResult[1] = VB->IndexPtr[1]->data;
		830
		831	if (IDX & LIGHT_COLORMATERIAL) {
		832	if (VB->ColorPtr[0]->Type != GL_FLOAT \|\|
		833	VB->ColorPtr[0]->Size != 4)
		834	import_color_material( ctx, stage );
		835
		836	CMcolor = (GLfloat *)VB->ColorPtr[0]->Ptr;
		837	CMstride = VB->ColorPtr[0]->StrideB;
		838	}
		839
		840	/* loop over vertices */
		841	for ( j=0 ;
		842	j<nr ;
		843	j++,STRIDE_F(vertex,VSTRIDE),STRIDE_F(normal, NSTRIDE), CMSTRIDE)
		844	{
		845	GLfloat diffuse[2], specular[2];
		846	GLuint side = 0;
		847	struct gl_light *light;
		848
		849	if ( CHECK_COLOR_MATERIAL(j) )
		850	_mesa_update_color_material( ctx, CMcolor );
		851
		852	if ( CHECK_MATERIAL(j) )
		853	_mesa_update_material( ctx, new_material[j], new_material_mask[j] );
		854
		855	if ( CHECK_VALIDATE(j) )
		856	TNL_CONTEXT(ctx)->Driver.NotifyMaterialChange( ctx );
		857
		858	diffuse[0] = specular[0] = 0.0F;
		859
		860	if ( IDX & LIGHT_TWOSIDE ) {
		861	diffuse[1] = specular[1] = 0.0F;
		862	}
		863
		864	/* Accumulate diffuse and specular from each light source */
		865	foreach (light, &ctx->Light.EnabledList) {
		866
		867	GLfloat attenuation = 1.0F;
		868	GLfloat VP[3]; /* unit vector from vertex to light */
		869	GLfloat n_dot_VP; /* dot product of l and n */
		870	GLfloat *h, n_dot_h, correction = 1.0;
		871
		872	/* compute l and attenuation */
		873	if (!(light->_Flags & LIGHT_POSITIONAL)) {
		874	/* directional light */
		875	COPY_3V(VP, light->_VP_inf_norm);
		876	}
		877	else {
		878	GLfloat d; /* distance from vertex to light */
		879
		880	SUB_3V(VP, light->_Position, vertex);
		881
		882	d = (GLfloat) LEN_3FV( VP );
		883	if ( d > 1e-6) {
		884	GLfloat invd = 1.0F / d;
		885	SELF_SCALE_SCALAR_3V(VP, invd);
		886	}
		887
		888	attenuation = 1.0F / (light->ConstantAttenuation + d *
		889	(light->LinearAttenuation + d *
		890	light->QuadraticAttenuation));
		891
		892	/* spotlight attenuation */
		893	if (light->_Flags & LIGHT_SPOT) {
		894	GLfloat PV_dot_dir = - DOT3(VP, light->_NormDirection);
		895	if (PV_dot_dir < light->_CosCutoff) {
		896	continue; /* this light makes no contribution */
		897	}
		898	else {
		899	GLdouble x = PV_dot_dir * (EXP_TABLE_SIZE-1);
		900	GLint k = (GLint) x;
		901	GLfloat spot = (GLfloat) (light->_SpotExpTable[k][0]
		902	+ (x-k)*light->_SpotExpTable[k][1]);
		903	attenuation *= spot;
		904	}
		905	}
		906	}
		907
		908	if (attenuation < 1e-3)
		909	continue; /* this light makes no contribution */
		910
		911	n_dot_VP = DOT3( normal, VP );
		912
		913	/* which side are we lighting? */
		914	if (n_dot_VP < 0.0F) {
		915	if (!(IDX & LIGHT_TWOSIDE))
		916	continue;
		917	side = 1;
		918	correction = -1;
		919	n_dot_VP = -n_dot_VP;
		920	}
		921
		922	/* accumulate diffuse term */
		923	diffuse[side] += n_dot_VP * light->_dli * attenuation;
		924
		925	/* specular term */
		926	if (ctx->Light.Model.LocalViewer) {
		927	GLfloat v[3];
		928	COPY_3V(v, vertex);
		929	NORMALIZE_3FV(v);
		930	SUB_3V(VP, VP, v); /* h = VP + VPe */
		931	h = VP;
		932	NORMALIZE_3FV(h);
		933	}
		934	else if (light->_Flags & LIGHT_POSITIONAL) {
		935	h = VP;
		936	/* Strangely, disabling this addition fixes a conformance
		937	* problem. If this code is enabled, l_sed.c fails.
		938	*/
		939	/ACC_3V(h, ctx->_EyeZDir);/
		940	NORMALIZE_3FV(h);
		941	}
		942	else {
		943	h = light->_h_inf_norm;
		944	}
		945
		946	n_dot_h = correction * DOT3(normal, h);
		947	if (n_dot_h > 0.0F) {
		948	GLfloat spec_coef;
		949	struct gl_shine_tab *tab = ctx->_ShineTable[side];
		950	GET_SHINE_TAB_ENTRY( tab, n_dot_h, spec_coef);
		951	specular[side] += spec_coef * light->_sli * attenuation;
		952	}
		953	} /loop over lights/
		954
		955	/* Now compute final color index */
		956	for (side = 0 ; side < NR_SIDES ; side++) {
		957	struct gl_material *mat = &ctx->Light.Material[side];
		958	GLfloat index;
		959
		960	if (specular[side] > 1.0F) {
		961	index = mat->SpecularIndex;
		962	}
		963	else {
		964	GLfloat d_a = mat->DiffuseIndex - mat->AmbientIndex;
		965	GLfloat s_a = mat->SpecularIndex - mat->AmbientIndex;
		966
		967	index = mat->AmbientIndex
		968	+ diffuse[side] * (1.0F-specular[side]) * d_a
		969	+ specular[side] * s_a;
		970
		971	if (index > mat->SpecularIndex) {
		972	index = mat->SpecularIndex;
		973	}
		974	}
		975	indexResult[side][j] = (GLuint) (GLint) index;
		976	}
		977	} /for vertex/
		978	}
		979
		980
		981
		982	static void TAG(init_light_tab)( void )
		983	{
		984	_tnl_light_tab[IDX] = TAG(light_rgba);
		985	_tnl_light_fast_tab[IDX] = TAG(light_fast_rgba);
		986	_tnl_light_fast_single_tab[IDX] = TAG(light_fast_rgba_single);
		987	_tnl_light_spec_tab[IDX] = TAG(light_rgba_spec);
		988	_tnl_light_ci_tab[IDX] = TAG(light_ci);
		989	}
		990
		991
		992	#undef TAG
		993	#undef IDX
		994	#undef NR_SIDES
		995	#undef NSTRIDE
		996	#undef VSTRIDE
		997	#undef CHECK_MATERIAL
		998	#undef CHECK_END_VB
		999	#undef DO_ANOTHER_NORMAL
		1000	#undef REUSE_LIGHT_RESULTS
		1001	#undef CMSTRIDE
		1002	#undef CHECK_COLOR_MATERIAL
		1003	#undef CHECK_VALIDATE

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(root)/shark/branches/xen/ports/mesa/src/tnl/t_vb_lighttmp.h - Rev 1618