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 "nv10_3d.xml.h"
31 #include "nouveau_util.h"
32 #include "nv10_driver.h"
33 #include "nv20_driver.h"
34
35 #define RC_IN_SHIFT_A 24
36 #define RC_IN_SHIFT_B 16
37 #define RC_IN_SHIFT_C 8
38 #define RC_IN_SHIFT_D 0
39 #define RC_IN_SHIFT_E 56
40 #define RC_IN_SHIFT_F 48
41 #define RC_IN_SHIFT_G 40
42
43 #define RC_IN_SOURCE(source) \
44 ((uint64_t)NV10_3D_RC_IN_RGB_D_INPUT_##source)
45 #define RC_IN_USAGE(usage) \
46 ((uint64_t)NV10_3D_RC_IN_RGB_D_COMPONENT_USAGE_##usage)
47 #define RC_IN_MAPPING(mapping) \
48 ((uint64_t)NV10_3D_RC_IN_RGB_D_MAPPING_##mapping)
49
50 #define RC_OUT_BIAS NV10_3D_RC_OUT_RGB_BIAS_BIAS_BY_NEGATIVE_ONE_HALF
51 #define RC_OUT_SCALE_1 NV10_3D_RC_OUT_RGB_SCALE_NONE
52 #define RC_OUT_SCALE_2 NV10_3D_RC_OUT_RGB_SCALE_SCALE_BY_TWO
53 #define RC_OUT_SCALE_4 NV10_3D_RC_OUT_RGB_SCALE_SCALE_BY_FOUR
54
55 /* Make the combiner do: spare0_i = A_i * B_i */
56 #define RC_OUT_AB NV10_3D_RC_OUT_RGB_AB_OUTPUT_SPARE0
57 /* spare0_i = dot3(A, B) */
58 #define RC_OUT_DOT_AB (NV10_3D_RC_OUT_RGB_AB_OUTPUT_SPARE0 | \
59 NV10_3D_RC_OUT_RGB_AB_DOT_PRODUCT)
60 /* spare0_i = A_i * B_i + C_i * D_i */
61 #define RC_OUT_SUM NV10_3D_RC_OUT_RGB_SUM_OUTPUT_SPARE0
62
63 struct combiner_state {
64 struct gl_context *ctx;
65 int unit;
66 GLboolean premodulate;
67
68 /* GL state */
69 GLenum mode;
70 GLenum16 *source;
71 GLenum16 *operand;
72 GLuint logscale;
73
74 /* Derived HW state */
75 uint64_t in;
76 uint32_t out;
77 };
78
79 /* Initialize a combiner_state struct from the texture unit
80 * context. */
81 #define INIT_COMBINER(chan, ctx, rc, i) do { \
82 struct gl_tex_env_combine_state *c = \
83 ctx->Texture.FixedFuncUnit[i]._CurrentCombine; \
84 (rc)->ctx = ctx; \
85 (rc)->unit = i; \
86 (rc)->premodulate = c->_NumArgs##chan == 4; \
87 (rc)->mode = c->Mode##chan; \
88 (rc)->source = c->Source##chan; \
89 (rc)->operand = c->Operand##chan; \
90 (rc)->logscale = c->ScaleShift##chan; \
91 (rc)->in = (rc)->out = 0; \
92 } while (0)
93
94 /* Get the RC input source for the specified EXT_texture_env_combine
95 * source. */
96 static uint32_t
get_input_source(struct combiner_state * rc,int source)97 get_input_source(struct combiner_state *rc, int source)
98 {
99 switch (source) {
100 case GL_ZERO:
101 return RC_IN_SOURCE(ZERO);
102
103 case GL_TEXTURE:
104 return RC_IN_SOURCE(TEXTURE0) + rc->unit;
105
106 case GL_TEXTURE0:
107 return RC_IN_SOURCE(TEXTURE0);
108
109 case GL_TEXTURE1:
110 return RC_IN_SOURCE(TEXTURE1);
111
112 case GL_TEXTURE2:
113 return RC_IN_SOURCE(TEXTURE2);
114
115 case GL_TEXTURE3:
116 return RC_IN_SOURCE(TEXTURE3);
117
118 case GL_CONSTANT:
119 return context_chipset(rc->ctx) >= 0x20 ?
120 RC_IN_SOURCE(CONSTANT_COLOR0) :
121 RC_IN_SOURCE(CONSTANT_COLOR0) + rc->unit;
122
123 case GL_PRIMARY_COLOR:
124 return RC_IN_SOURCE(PRIMARY_COLOR);
125
126 case GL_PREVIOUS:
127 return rc->unit ? RC_IN_SOURCE(SPARE0)
128 : RC_IN_SOURCE(PRIMARY_COLOR);
129
130 default:
131 assert(0);
132 }
133 }
134
135 /* Get the RC input mapping for the specified texture_env_combine
136 * operand, possibly inverted or biased. */
137 #define INVERT 0x1
138 #define NORMALIZE 0x2
139
140 static uint32_t
get_input_mapping(struct combiner_state * rc,int operand,int flags)141 get_input_mapping(struct combiner_state *rc, int operand, int flags)
142 {
143 int map = 0;
144
145 if (is_color_operand(operand))
146 map |= RC_IN_USAGE(RGB);
147 else
148 map |= RC_IN_USAGE(ALPHA);
149
150 if (is_negative_operand(operand) == !(flags & INVERT))
151 map |= flags & NORMALIZE ?
152 RC_IN_MAPPING(EXPAND_NEGATE) :
153 RC_IN_MAPPING(UNSIGNED_INVERT);
154 else
155 map |= flags & NORMALIZE ?
156 RC_IN_MAPPING(EXPAND_NORMAL) :
157 RC_IN_MAPPING(UNSIGNED_IDENTITY);
158
159 return map;
160 }
161
162 static uint32_t
get_input_arg(struct combiner_state * rc,int arg,int flags)163 get_input_arg(struct combiner_state *rc, int arg, int flags)
164 {
165 int source = rc->source[arg];
166 int operand = rc->operand[arg];
167
168 /* Fake several unsupported texture formats. */
169 if (is_texture_source(source)) {
170 int i = (source == GL_TEXTURE ?
171 rc->unit : source - GL_TEXTURE0);
172 struct gl_texture_object *t = rc->ctx->Texture.Unit[i]._Current;
173 mesa_format format = t->Image[0][t->Attrib.BaseLevel]->TexFormat;
174
175 if (format == MESA_FORMAT_A_UNORM8) {
176 /* Emulated using I8. */
177 if (is_color_operand(operand))
178 return RC_IN_SOURCE(ZERO) |
179 get_input_mapping(rc, operand, flags);
180
181 } else if (format == MESA_FORMAT_L_UNORM8) {
182 /* Sometimes emulated using I8. */
183 if (!is_color_operand(operand))
184 return RC_IN_SOURCE(ZERO) |
185 get_input_mapping(rc, operand,
186 flags ^ INVERT);
187
188 } else if (format == MESA_FORMAT_B8G8R8X8_UNORM) {
189 /* Sometimes emulated using ARGB8888. */
190 if (!is_color_operand(operand))
191 return RC_IN_SOURCE(ZERO) |
192 get_input_mapping(rc, operand,
193 flags ^ INVERT);
194 }
195 }
196
197 return get_input_source(rc, source) |
198 get_input_mapping(rc, operand, flags);
199 }
200
201 /* Bind the RC input variable <var> to the EXT_texture_env_combine
202 * argument <arg>, possibly inverted or biased. */
203 #define INPUT_ARG(rc, var, arg, flags) \
204 (rc)->in |= get_input_arg(rc, arg, flags) << RC_IN_SHIFT_##var
205
206 /* Bind the RC input variable <var> to the RC source <src>. */
207 #define INPUT_SRC(rc, var, src, chan) \
208 (rc)->in |= (RC_IN_SOURCE(src) | \
209 RC_IN_USAGE(chan)) << RC_IN_SHIFT_##var
210
211 /* Bind the RC input variable <var> to a constant +/-1 */
212 #define INPUT_ONE(rc, var, flags) \
213 (rc)->in |= (RC_IN_SOURCE(ZERO) | \
214 (flags & INVERT ? RC_IN_MAPPING(EXPAND_NORMAL) : \
215 RC_IN_MAPPING(UNSIGNED_INVERT))) << RC_IN_SHIFT_##var
216
217 static void
setup_combiner(struct combiner_state * rc)218 setup_combiner(struct combiner_state *rc)
219 {
220 switch (rc->mode) {
221 case GL_REPLACE:
222 INPUT_ARG(rc, A, 0, 0);
223 INPUT_ONE(rc, B, 0);
224
225 rc->out = RC_OUT_AB;
226 break;
227
228 case GL_MODULATE:
229 INPUT_ARG(rc, A, 0, 0);
230 INPUT_ARG(rc, B, 1, 0);
231
232 rc->out = RC_OUT_AB;
233 break;
234
235 case GL_ADD:
236 case GL_ADD_SIGNED:
237 if (rc->premodulate) {
238 INPUT_ARG(rc, A, 0, 0);
239 INPUT_ARG(rc, B, 1, 0);
240 INPUT_ARG(rc, C, 2, 0);
241 INPUT_ARG(rc, D, 3, 0);
242 } else {
243 INPUT_ARG(rc, A, 0, 0);
244 INPUT_ONE(rc, B, 0);
245 INPUT_ARG(rc, C, 1, 0);
246 INPUT_ONE(rc, D, 0);
247 }
248
249 rc->out = RC_OUT_SUM |
250 (rc->mode == GL_ADD_SIGNED ? RC_OUT_BIAS : 0);
251 break;
252
253 case GL_INTERPOLATE:
254 INPUT_ARG(rc, A, 0, 0);
255 INPUT_ARG(rc, B, 2, 0);
256 INPUT_ARG(rc, C, 1, 0);
257 INPUT_ARG(rc, D, 2, INVERT);
258
259 rc->out = RC_OUT_SUM;
260 break;
261
262 case GL_SUBTRACT:
263 INPUT_ARG(rc, A, 0, 0);
264 INPUT_ONE(rc, B, 0);
265 INPUT_ARG(rc, C, 1, 0);
266 INPUT_ONE(rc, D, INVERT);
267
268 rc->out = RC_OUT_SUM;
269 break;
270
271 case GL_DOT3_RGB:
272 case GL_DOT3_RGBA:
273 INPUT_ARG(rc, A, 0, NORMALIZE);
274 INPUT_ARG(rc, B, 1, NORMALIZE);
275
276 rc->out = RC_OUT_DOT_AB;
277 break;
278
279 case GL_DOT3_RGB_EXT:
280 case GL_DOT3_RGBA_EXT:
281 INPUT_ARG(rc, A, 0, NORMALIZE);
282 INPUT_ARG(rc, B, 1, NORMALIZE);
283
284 rc->out = RC_OUT_DOT_AB;
285
286 /* The EXT version of the DOT3 extension does not support the
287 * scale factor, but the ARB version (and the version in
288 * OpenGL 1.3) does.
289 */
290 rc->logscale = 0;
291 break;
292
293 default:
294 assert(0);
295 }
296
297 switch (rc->logscale) {
298 case 0:
299 rc->out |= RC_OUT_SCALE_1;
300 break;
301 case 1:
302 rc->out |= RC_OUT_SCALE_2;
303 break;
304 case 2:
305 rc->out |= RC_OUT_SCALE_4;
306 break;
307 default:
308 assert(0);
309 }
310 }
311
312 void
nv10_get_general_combiner(struct gl_context * ctx,int i,uint32_t * a_in,uint32_t * a_out,uint32_t * c_in,uint32_t * c_out,uint32_t * k)313 nv10_get_general_combiner(struct gl_context *ctx, int i,
314 uint32_t *a_in, uint32_t *a_out,
315 uint32_t *c_in, uint32_t *c_out, uint32_t *k)
316 {
317 struct combiner_state rc_a, rc_c;
318
319 if (ctx->Texture.Unit[i]._Current) {
320 INIT_COMBINER(RGB, ctx, &rc_c, i);
321
322 if (rc_c.mode == GL_DOT3_RGBA || rc_c.mode == GL_DOT3_RGBA_EXT)
323 rc_a = rc_c;
324 else
325 INIT_COMBINER(A, ctx, &rc_a, i);
326
327 setup_combiner(&rc_c);
328 setup_combiner(&rc_a);
329
330 } else {
331 rc_a.in = rc_a.out = rc_c.in = rc_c.out = 0;
332 }
333
334 *k = pack_rgba_f(MESA_FORMAT_B8G8R8A8_UNORM,
335 ctx->Texture.FixedFuncUnit[i].EnvColor);
336 *a_in = rc_a.in;
337 *a_out = rc_a.out;
338 *c_in = rc_c.in;
339 *c_out = rc_c.out;
340 }
341
342 void
nv10_get_final_combiner(struct gl_context * ctx,uint64_t * in,int * n)343 nv10_get_final_combiner(struct gl_context *ctx, uint64_t *in, int *n)
344 {
345 struct combiner_state rc = {};
346
347 /*
348 * The final fragment value equation is something like:
349 * x_i = A_i * B_i + (1 - A_i) * C_i + D_i
350 * x_alpha = G_alpha
351 * where D_i = E_i * F_i, i one of {red, green, blue}.
352 */
353 if (ctx->Fog.ColorSumEnabled || ctx->Light.Enabled) {
354 INPUT_SRC(&rc, D, E_TIMES_F, RGB);
355 INPUT_SRC(&rc, F, SECONDARY_COLOR, RGB);
356 }
357
358 if (ctx->Fog.Enabled) {
359 INPUT_SRC(&rc, A, FOG, ALPHA);
360 INPUT_SRC(&rc, C, FOG, RGB);
361 INPUT_SRC(&rc, E, FOG, ALPHA);
362 } else {
363 INPUT_ONE(&rc, A, 0);
364 INPUT_ONE(&rc, C, 0);
365 INPUT_ONE(&rc, E, 0);
366 }
367
368 if (ctx->Texture._MaxEnabledTexImageUnit != -1) {
369 INPUT_SRC(&rc, B, SPARE0, RGB);
370 INPUT_SRC(&rc, G, SPARE0, ALPHA);
371 } else {
372 INPUT_SRC(&rc, B, PRIMARY_COLOR, RGB);
373 INPUT_SRC(&rc, G, PRIMARY_COLOR, ALPHA);
374 }
375
376 *in = rc.in;
377 *n = ctx->Texture._MaxEnabledTexImageUnit + 1;
378 }
379
380 void
nv10_emit_tex_env(struct gl_context * ctx,int emit)381 nv10_emit_tex_env(struct gl_context *ctx, int emit)
382 {
383 const int i = emit - NOUVEAU_STATE_TEX_ENV0;
384 struct nouveau_pushbuf *push = context_push(ctx);
385 uint32_t a_in, a_out, c_in, c_out, k;
386
387 nv10_get_general_combiner(ctx, i, &a_in, &a_out, &c_in, &c_out, &k);
388
389 /* Enable the combiners we're going to need. */
390 if (i == 1) {
391 if (c_out || a_out)
392 c_out |= 0x5 << 27;
393 else
394 c_out |= 0x3 << 27;
395 }
396
397 BEGIN_NV04(push, NV10_3D(RC_IN_ALPHA(i)), 1);
398 PUSH_DATA (push, a_in);
399 BEGIN_NV04(push, NV10_3D(RC_IN_RGB(i)), 1);
400 PUSH_DATA (push, c_in);
401 BEGIN_NV04(push, NV10_3D(RC_COLOR(i)), 1);
402 PUSH_DATA (push, k);
403 BEGIN_NV04(push, NV10_3D(RC_OUT_ALPHA(i)), 1);
404 PUSH_DATA (push, a_out);
405 BEGIN_NV04(push, NV10_3D(RC_OUT_RGB(i)), 1);
406 PUSH_DATA (push, c_out);
407
408 context_dirty(ctx, FRAG);
409 }
410
411 void
nv10_emit_frag(struct gl_context * ctx,int emit)412 nv10_emit_frag(struct gl_context *ctx, int emit)
413 {
414 struct nouveau_pushbuf *push = context_push(ctx);
415 uint64_t in;
416 int n;
417
418 nv10_get_final_combiner(ctx, &in, &n);
419
420 BEGIN_NV04(push, NV10_3D(RC_FINAL0), 2);
421 PUSH_DATA (push, in);
422 PUSH_DATA (push, in >> 32);
423 }
424