1/*
2 * Copyright (C) 2009-2010 Francisco Jerez.
3 * All Rights Reserved.
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining
6 * a copy of this software and associated documentation files (the
7 * "Software"), to deal in the Software without restriction, including
8 * without limitation the rights to use, copy, modify, merge, publish,
9 * distribute, sublicense, and/or sell copies of the Software, and to
10 * permit persons to whom the Software is furnished to do so, subject to
11 * the following conditions:
12 *
13 * The above copyright notice and this permission notice (including the
14 * next paragraph) shall be included in all copies or substantial
15 * portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
18 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
20 * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
21 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
22 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
23 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
24 *
25 */
26
27#include "nouveau_driver.h"
28#include "nouveau_context.h"
29#include "nouveau_gldefs.h"
30#include "nouveau_util.h"
31#include "nv10_3d.xml.h"
32#include "nv10_driver.h"
33
34void
35nv10_emit_clip_plane(struct gl_context *ctx, int emit)
36{
37}
38
39static inline unsigned
40get_material_bitmask(unsigned m)
41{
42	unsigned ret = 0;
43
44	if (m & MAT_BIT_FRONT_EMISSION)
45		ret |= NV10_3D_COLOR_MATERIAL_EMISSION;
46	if (m & MAT_BIT_FRONT_AMBIENT)
47		ret |= NV10_3D_COLOR_MATERIAL_AMBIENT;
48	if (m & MAT_BIT_FRONT_DIFFUSE)
49		ret |= NV10_3D_COLOR_MATERIAL_DIFFUSE;
50	if (m & MAT_BIT_FRONT_SPECULAR)
51		ret |= NV10_3D_COLOR_MATERIAL_SPECULAR;
52
53	return ret;
54}
55
56void
57nv10_emit_color_material(struct gl_context *ctx, int emit)
58{
59	struct nouveau_pushbuf *push = context_push(ctx);
60	unsigned mask = get_material_bitmask(ctx->Light._ColorMaterialBitmask);
61
62	BEGIN_NV04(push, NV10_3D(COLOR_MATERIAL), 1);
63	PUSH_DATA (push, ctx->Light.ColorMaterialEnabled ? mask : 0);
64}
65
66static unsigned
67get_fog_mode(unsigned mode)
68{
69	switch (mode) {
70	case GL_LINEAR:
71		return NV10_3D_FOG_MODE_LINEAR;
72	case GL_EXP:
73		return NV10_3D_FOG_MODE_EXP;
74	case GL_EXP2:
75		return NV10_3D_FOG_MODE_EXP2;
76	default:
77		assert(0);
78	}
79}
80
81static unsigned
82get_fog_source(unsigned source, unsigned distance_mode)
83{
84	switch (source) {
85	case GL_FOG_COORDINATE_EXT:
86		return NV10_3D_FOG_COORD_FOG;
87	case GL_FRAGMENT_DEPTH_EXT:
88		switch (distance_mode) {
89		case GL_EYE_PLANE_ABSOLUTE_NV:
90			return NV10_3D_FOG_COORD_DIST_ORTHOGONAL_ABS;
91		case GL_EYE_PLANE:
92			return NV10_3D_FOG_COORD_DIST_ORTHOGONAL;
93		case GL_EYE_RADIAL_NV:
94			return NV10_3D_FOG_COORD_DIST_RADIAL;
95		default:
96			assert(0);
97		}
98	default:
99		assert(0);
100	}
101}
102
103void
104nv10_get_fog_coeff(struct gl_context *ctx, float k[3])
105{
106	struct gl_fog_attrib *f = &ctx->Fog;
107
108	switch (f->Mode) {
109	case GL_LINEAR:
110		k[0] = 2 + f->Start / (f->End - f->Start);
111		k[1] = -1 / (f->End - f->Start);
112		break;
113
114	case GL_EXP:
115		k[0] = 1.5;
116		k[1] = -0.09 * f->Density;
117		break;
118
119	case GL_EXP2:
120		k[0] = 1.5;
121		k[1] = -0.21 * f->Density;
122		break;
123
124	default:
125		assert(0);
126	}
127
128	k[2] = 0;
129}
130
131void
132nv10_emit_fog(struct gl_context *ctx, int emit)
133{
134	struct nouveau_context *nctx = to_nouveau_context(ctx);
135	struct nouveau_pushbuf *push = context_push(ctx);
136	struct gl_fog_attrib *f = &ctx->Fog;
137	unsigned source = nctx->fallback == HWTNL ?
138		f->FogCoordinateSource : GL_FOG_COORDINATE_EXT;
139	float k[3];
140
141	nv10_get_fog_coeff(ctx, k);
142
143	BEGIN_NV04(push, NV10_3D(FOG_MODE), 4);
144	PUSH_DATA (push, get_fog_mode(f->Mode));
145	PUSH_DATA (push, get_fog_source(source, f->FogDistanceMode));
146	PUSH_DATAb(push, f->Enabled);
147	PUSH_DATA (push, pack_rgba_f(MESA_FORMAT_RGBA8888_REV, f->Color));
148
149	BEGIN_NV04(push, NV10_3D(FOG_COEFF(0)), 3);
150	PUSH_DATAp(push, k, 3);
151
152	context_dirty(ctx, FRAG);
153}
154
155static inline unsigned
156get_light_mode(struct gl_light *l)
157{
158	if (l->Enabled) {
159		if (l->_Flags & LIGHT_SPOT)
160			return NV10_3D_ENABLED_LIGHTS_0_DIRECTIONAL;
161		else if (l->_Flags & LIGHT_POSITIONAL)
162			return NV10_3D_ENABLED_LIGHTS_0_POSITIONAL;
163		else
164			return NV10_3D_ENABLED_LIGHTS_0_NONPOSITIONAL;
165	} else {
166		return NV10_3D_ENABLED_LIGHTS_0_DISABLED;
167	}
168}
169
170void
171nv10_emit_light_enable(struct gl_context *ctx, int emit)
172{
173	struct nouveau_context *nctx = to_nouveau_context(ctx);
174	struct nouveau_pushbuf *push = context_push(ctx);
175	uint32_t en_lights = 0;
176	int i;
177
178	if (nctx->fallback != HWTNL) {
179		BEGIN_NV04(push, NV10_3D(LIGHTING_ENABLE), 1);
180		PUSH_DATA (push, 0);
181		return;
182	}
183
184	for (i = 0; i < MAX_LIGHTS; i++)
185		en_lights |= get_light_mode(&ctx->Light.Light[i]) << 2 * i;
186
187	BEGIN_NV04(push, NV10_3D(ENABLED_LIGHTS), 1);
188	PUSH_DATA (push, en_lights);
189	BEGIN_NV04(push, NV10_3D(LIGHTING_ENABLE), 1);
190	PUSH_DATAb(push, ctx->Light.Enabled);
191	BEGIN_NV04(push, NV10_3D(NORMALIZE_ENABLE), 1);
192	PUSH_DATAb(push, ctx->Transform.Normalize);
193}
194
195void
196nv10_emit_light_model(struct gl_context *ctx, int emit)
197{
198	struct nouveau_pushbuf *push = context_push(ctx);
199	struct gl_lightmodel *m = &ctx->Light.Model;
200
201	BEGIN_NV04(push, NV10_3D(SEPARATE_SPECULAR_ENABLE), 1);
202	PUSH_DATAb(push, m->ColorControl == GL_SEPARATE_SPECULAR_COLOR);
203
204	BEGIN_NV04(push, NV10_3D(LIGHT_MODEL), 1);
205	PUSH_DATA (push, ((m->LocalViewer ?
206			 NV10_3D_LIGHT_MODEL_LOCAL_VIEWER : 0) |
207			(_mesa_need_secondary_color(ctx) ?
208			 NV10_3D_LIGHT_MODEL_SEPARATE_SPECULAR : 0) |
209			(!ctx->Light.Enabled && ctx->Fog.ColorSumEnabled ?
210			 NV10_3D_LIGHT_MODEL_VERTEX_SPECULAR : 0)));
211}
212
213static float
214get_shine(const float p[], float x)
215{
216	const int n = 15;
217	const float *y = &p[1];
218	float f = (n - 1) * (1 - 1 / (1 + p[0] * x))
219		/ (1 - 1 / (1 + p[0] * 1024));
220	int i = f;
221
222	/* Linear interpolation in f-space (Faster and somewhat more
223	 * accurate than x-space). */
224	if (x == 0)
225		return y[0];
226	else if (i > n - 2)
227		return y[n - 1];
228	else
229		return y[i] + (y[i + 1] - y[i]) * (f - i);
230}
231
232static const float nv10_spot_params[2][16] = {
233	{ 0.02, -3.80e-05, -1.77, -2.41, -2.71, -2.88, -2.98, -3.06,
234	  -3.11, -3.17, -3.23, -3.28, -3.37, -3.47, -3.83, -5.11 },
235	{ 0.02, -0.01, 1.77, 2.39, 2.70, 2.87, 2.98, 3.06,
236	  3.10, 3.16, 3.23, 3.27, 3.37, 3.47, 3.83, 5.11 },
237};
238
239void
240nv10_get_spot_coeff(struct gl_light *l, float k[7])
241{
242	float e = l->SpotExponent;
243	float a0, b0, a1, a2, b2, a3;
244
245	if (e > 0)
246		a0 = -1 - 5.36e-3 / sqrt(e);
247	else
248		a0 = -1;
249	b0 = 1 / (1 + 0.273 * e);
250
251	a1 = get_shine(nv10_spot_params[0], e);
252
253	a2 = get_shine(nv10_spot_params[1], e);
254	b2 = 1 / (1 + 0.273 * e);
255
256	a3 = 0.9 + 0.278 * e;
257
258	if (l->SpotCutoff > 0) {
259		float cutoff = MAX2(a3, 1 / (1 - l->_CosCutoff));
260
261		k[0] = MAX2(0, a0 + b0 * cutoff);
262		k[1] = a1;
263		k[2] = a2 + b2 * cutoff;
264		k[3] = - cutoff * l->_NormSpotDirection[0];
265		k[4] = - cutoff * l->_NormSpotDirection[1];
266		k[5] = - cutoff * l->_NormSpotDirection[2];
267		k[6] = 1 - cutoff;
268
269	} else {
270		k[0] = b0;
271		k[1] = a1;
272		k[2] = a2 + b2;
273		k[3] = - l->_NormSpotDirection[0];
274		k[4] = - l->_NormSpotDirection[1];
275		k[5] = - l->_NormSpotDirection[2];
276		k[6] = -1;
277	}
278}
279
280void
281nv10_emit_light_source(struct gl_context *ctx, int emit)
282{
283	const int i = emit - NOUVEAU_STATE_LIGHT_SOURCE0;
284	struct nouveau_pushbuf *push = context_push(ctx);
285	struct gl_light *l = &ctx->Light.Light[i];
286
287	if (l->_Flags & LIGHT_POSITIONAL) {
288		BEGIN_NV04(push, NV10_3D(LIGHT_POSITION_X(i)), 3);
289		PUSH_DATAp(push, l->_Position, 3);
290
291		BEGIN_NV04(push, NV10_3D(LIGHT_ATTENUATION_CONSTANT(i)), 3);
292		PUSH_DATAf(push, l->ConstantAttenuation);
293		PUSH_DATAf(push, l->LinearAttenuation);
294		PUSH_DATAf(push, l->QuadraticAttenuation);
295
296	} else {
297		BEGIN_NV04(push, NV10_3D(LIGHT_DIRECTION_X(i)), 3);
298		PUSH_DATAp(push, l->_VP_inf_norm, 3);
299
300		BEGIN_NV04(push, NV10_3D(LIGHT_HALF_VECTOR_X(i)), 3);
301		PUSH_DATAp(push, l->_h_inf_norm, 3);
302	}
303
304	if (l->_Flags & LIGHT_SPOT) {
305		float k[7];
306
307		nv10_get_spot_coeff(l, k);
308
309		BEGIN_NV04(push, NV10_3D(LIGHT_SPOT_CUTOFF(i, 0)), 7);
310		PUSH_DATAp(push, k, 7);
311	}
312}
313
314#define USE_COLOR_MATERIAL(attr)					\
315	(ctx->Light.ColorMaterialEnabled &&				\
316	 ctx->Light._ColorMaterialBitmask & (1 << MAT_ATTRIB_FRONT_##attr))
317
318void
319nv10_emit_material_ambient(struct gl_context *ctx, int emit)
320{
321	struct nouveau_pushbuf *push = context_push(ctx);
322	float (*mat)[4] = ctx->Light.Material.Attrib;
323	float c_scene[3], c_factor[3];
324	struct gl_light *l;
325
326	if (USE_COLOR_MATERIAL(AMBIENT)) {
327		COPY_3V(c_scene, ctx->Light.Model.Ambient);
328		COPY_3V(c_factor, mat[MAT_ATTRIB_FRONT_EMISSION]);
329
330	} else if (USE_COLOR_MATERIAL(EMISSION)) {
331		SCALE_3V(c_scene, mat[MAT_ATTRIB_FRONT_AMBIENT],
332			 ctx->Light.Model.Ambient);
333		ZERO_3V(c_factor);
334
335	} else {
336		COPY_3V(c_scene, ctx->Light._BaseColor[0]);
337		ZERO_3V(c_factor);
338	}
339
340	BEGIN_NV04(push, NV10_3D(LIGHT_MODEL_AMBIENT_R), 3);
341	PUSH_DATAp(push, c_scene, 3);
342
343	if (ctx->Light.ColorMaterialEnabled) {
344		BEGIN_NV04(push, NV10_3D(MATERIAL_FACTOR_R), 3);
345		PUSH_DATAp(push, c_factor, 3);
346	}
347
348	foreach(l, &ctx->Light.EnabledList) {
349		const int i = l - ctx->Light.Light;
350		float *c_light = (USE_COLOR_MATERIAL(AMBIENT) ?
351				  l->Ambient :
352				  l->_MatAmbient[0]);
353
354		BEGIN_NV04(push, NV10_3D(LIGHT_AMBIENT_R(i)), 3);
355		PUSH_DATAp(push, c_light, 3);
356	}
357}
358
359void
360nv10_emit_material_diffuse(struct gl_context *ctx, int emit)
361{
362	struct nouveau_pushbuf *push = context_push(ctx);
363	GLfloat (*mat)[4] = ctx->Light.Material.Attrib;
364	struct gl_light *l;
365
366	BEGIN_NV04(push, NV10_3D(MATERIAL_FACTOR_A), 1);
367	PUSH_DATAf(push, mat[MAT_ATTRIB_FRONT_DIFFUSE][3]);
368
369	foreach(l, &ctx->Light.EnabledList) {
370		const int i = l - ctx->Light.Light;
371		float *c_light = (USE_COLOR_MATERIAL(DIFFUSE) ?
372				  l->Diffuse :
373				  l->_MatDiffuse[0]);
374
375		BEGIN_NV04(push, NV10_3D(LIGHT_DIFFUSE_R(i)), 3);
376		PUSH_DATAp(push, c_light, 3);
377	}
378}
379
380void
381nv10_emit_material_specular(struct gl_context *ctx, int emit)
382{
383	struct nouveau_pushbuf *push = context_push(ctx);
384	struct gl_light *l;
385
386	foreach(l, &ctx->Light.EnabledList) {
387		const int i = l - ctx->Light.Light;
388		float *c_light = (USE_COLOR_MATERIAL(SPECULAR) ?
389				  l->Specular :
390				  l->_MatSpecular[0]);
391
392		BEGIN_NV04(push, NV10_3D(LIGHT_SPECULAR_R(i)), 3);
393		PUSH_DATAp(push, c_light, 3);
394	}
395}
396
397static const float nv10_shininess_param[6][16] = {
398	{ 0.70, 0.00, 0.06, 0.06, 0.05, 0.04, 0.02, 0.00,
399	  -0.06, -0.13, -0.24, -0.36, -0.51, -0.66, -0.82, -1.00 },
400	{ 0.01, 1.00, -2.29, -2.77, -2.96, -3.06, -3.12, -3.18,
401	  -3.24, -3.29, -3.36, -3.43, -3.51, -3.75, -4.33, -5.11 },
402	{ 0.02, 0.00, 2.28, 2.75, 2.94, 3.04, 3.1, 3.15,
403	  3.18, 3.22, 3.27, 3.32, 3.39, 3.48, 3.84, 5.11 },
404	{ 0.70, 0.00, 0.05, 0.06, 0.06, 0.06, 0.05, 0.04,
405	  0.02, 0.01, -0.03, -0.12, -0.25, -0.43, -0.68, -0.99 },
406	{ 0.01, 1.00, -1.61, -2.35, -2.67, -2.84, -2.96, -3.05,
407	  -3.08, -3.14, -3.2, -3.26, -3.32, -3.42, -3.54, -4.21 },
408	{ 0.01, 0.00, 2.25, 2.73, 2.92, 3.03, 3.09, 3.15,
409	  3.16, 3.21, 3.25, 3.29, 3.35, 3.43, 3.56, 4.22 },
410};
411
412void
413nv10_get_shininess_coeff(float s, float k[6])
414{
415	int i;
416
417	for (i = 0; i < 6; i++)
418		k[i] = get_shine(nv10_shininess_param[i], s);
419}
420
421void
422nv10_emit_material_shininess(struct gl_context *ctx, int emit)
423{
424	struct nouveau_pushbuf *push = context_push(ctx);
425	float (*mat)[4] = ctx->Light.Material.Attrib;
426	float k[6];
427
428	nv10_get_shininess_coeff(
429		CLAMP(mat[MAT_ATTRIB_FRONT_SHININESS][0], 0, 1024),
430		k);
431
432	BEGIN_NV04(push, NV10_3D(MATERIAL_SHININESS(0)), 6);
433	PUSH_DATAp(push, k, 6);
434}
435
436void
437nv10_emit_modelview(struct gl_context *ctx, int emit)
438{
439	struct nouveau_context *nctx = to_nouveau_context(ctx);
440	struct nouveau_pushbuf *push = context_push(ctx);
441	GLmatrix *m = ctx->ModelviewMatrixStack.Top;
442
443	if (nctx->fallback != HWTNL)
444		return;
445
446	if (ctx->Light._NeedEyeCoords || ctx->Fog.Enabled ||
447	    (ctx->Texture._GenFlags & TEXGEN_NEED_EYE_COORD)) {
448		BEGIN_NV04(push, NV10_3D(MODELVIEW_MATRIX(0, 0)), 16);
449		PUSH_DATAm(push, m->m);
450	}
451
452	if (ctx->Light.Enabled ||
453	    (ctx->Texture._GenFlags & TEXGEN_NEED_EYE_COORD)) {
454		int i, j;
455
456		BEGIN_NV04(push, NV10_3D(INVERSE_MODELVIEW_MATRIX(0, 0)), 12);
457		for (i = 0; i < 3; i++)
458			for (j = 0; j < 4; j++)
459				PUSH_DATAf(push, m->inv[4*i + j]);
460	}
461}
462
463void
464nv10_emit_point_parameter(struct gl_context *ctx, int emit)
465{
466}
467
468void
469nv10_emit_projection(struct gl_context *ctx, int emit)
470{
471	struct nouveau_context *nctx = to_nouveau_context(ctx);
472	struct nouveau_pushbuf *push = context_push(ctx);
473	GLmatrix m;
474
475	_math_matrix_ctr(&m);
476	get_viewport_scale(ctx, m.m);
477
478	if (nv10_use_viewport_zclear(ctx))
479		m.m[MAT_SZ] /= 8;
480
481	if (nctx->fallback == HWTNL)
482		_math_matrix_mul_matrix(&m, &m, &ctx->_ModelProjectMatrix);
483
484	BEGIN_NV04(push, NV10_3D(PROJECTION_MATRIX(0)), 16);
485	PUSH_DATAm(push, m.m);
486
487	_math_matrix_dtr(&m);
488}
489