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 GLenum *source; 71 GLenum *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.Unit[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 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 HALF_BIAS 0x2 139 140 static uint32_t 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 & HALF_BIAS ? 152 RC_IN_MAPPING(HALF_BIAS_NEGATE) : 153 RC_IN_MAPPING(UNSIGNED_INVERT); 154 else 155 map |= flags & HALF_BIAS ? 156 RC_IN_MAPPING(HALF_BIAS_NORMAL) : 157 RC_IN_MAPPING(UNSIGNED_IDENTITY); 158 159 return map; 160 } 161 162 static uint32_t 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 gl_format format = t->Image[0][t->BaseLevel]->TexFormat; 174 175 if (format == MESA_FORMAT_A8) { 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_L8) { 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_XRGB8888) { 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 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, HALF_BIAS); 274 INPUT_ARG(rc, B, 1, HALF_BIAS); 275 276 rc->out = RC_OUT_DOT_AB | RC_OUT_SCALE_4; 277 278 assert(!rc->logscale); 279 break; 280 281 default: 282 assert(0); 283 } 284 285 switch (rc->logscale) { 286 case 0: 287 rc->out |= RC_OUT_SCALE_1; 288 break; 289 case 1: 290 rc->out |= RC_OUT_SCALE_2; 291 break; 292 case 2: 293 rc->out |= RC_OUT_SCALE_4; 294 break; 295 default: 296 assert(0); 297 } 298 } 299 300 void 301 nv10_get_general_combiner(struct gl_context *ctx, int i, 302 uint32_t *a_in, uint32_t *a_out, 303 uint32_t *c_in, uint32_t *c_out, uint32_t *k) 304 { 305 struct combiner_state rc_a, rc_c; 306 307 if (ctx->Texture.Unit[i]._ReallyEnabled) { 308 INIT_COMBINER(RGB, ctx, &rc_c, i); 309 310 if (rc_c.mode == GL_DOT3_RGBA) 311 rc_a = rc_c; 312 else 313 INIT_COMBINER(A, ctx, &rc_a, i); 314 315 setup_combiner(&rc_c); 316 setup_combiner(&rc_a); 317 318 } else { 319 rc_a.in = rc_a.out = rc_c.in = rc_c.out = 0; 320 } 321 322 *k = pack_rgba_f(MESA_FORMAT_ARGB8888, 323 ctx->Texture.Unit[i].EnvColor); 324 *a_in = rc_a.in; 325 *a_out = rc_a.out; 326 *c_in = rc_c.in; 327 *c_out = rc_c.out; 328 } 329 330 void 331 nv10_get_final_combiner(struct gl_context *ctx, uint64_t *in, int *n) 332 { 333 struct combiner_state rc = {}; 334 335 /* 336 * The final fragment value equation is something like: 337 * x_i = A_i * B_i + (1 - A_i) * C_i + D_i 338 * x_alpha = G_alpha 339 * where D_i = E_i * F_i, i one of {red, green, blue}. 340 */ 341 if (ctx->Fog.ColorSumEnabled || ctx->Light.Enabled) { 342 INPUT_SRC(&rc, D, E_TIMES_F, RGB); 343 INPUT_SRC(&rc, F, SECONDARY_COLOR, RGB); 344 } 345 346 if (ctx->Fog.Enabled) { 347 INPUT_SRC(&rc, A, FOG, ALPHA); 348 INPUT_SRC(&rc, C, FOG, RGB); 349 INPUT_SRC(&rc, E, FOG, ALPHA); 350 } else { 351 INPUT_ONE(&rc, A, 0); 352 INPUT_ONE(&rc, C, 0); 353 INPUT_ONE(&rc, E, 0); 354 } 355 356 if (ctx->Texture._EnabledUnits) { 357 INPUT_SRC(&rc, B, SPARE0, RGB); 358 INPUT_SRC(&rc, G, SPARE0, ALPHA); 359 } else { 360 INPUT_SRC(&rc, B, PRIMARY_COLOR, RGB); 361 INPUT_SRC(&rc, G, PRIMARY_COLOR, ALPHA); 362 } 363 364 *in = rc.in; 365 *n = log2i(ctx->Texture._EnabledUnits) + 1; 366 } 367 368 void 369 nv10_emit_tex_env(struct gl_context *ctx, int emit) 370 { 371 const int i = emit - NOUVEAU_STATE_TEX_ENV0; 372 struct nouveau_pushbuf *push = context_push(ctx); 373 uint32_t a_in, a_out, c_in, c_out, k; 374 375 nv10_get_general_combiner(ctx, i, &a_in, &a_out, &c_in, &c_out, &k); 376 377 /* Enable the combiners we're going to need. */ 378 if (i == 1) { 379 if (c_out || a_out) 380 c_out |= 0x5 << 27; 381 else 382 c_out |= 0x3 << 27; 383 } 384 385 BEGIN_NV04(push, NV10_3D(RC_IN_ALPHA(i)), 1); 386 PUSH_DATA (push, a_in); 387 BEGIN_NV04(push, NV10_3D(RC_IN_RGB(i)), 1); 388 PUSH_DATA (push, c_in); 389 BEGIN_NV04(push, NV10_3D(RC_COLOR(i)), 1); 390 PUSH_DATA (push, k); 391 BEGIN_NV04(push, NV10_3D(RC_OUT_ALPHA(i)), 1); 392 PUSH_DATA (push, a_out); 393 BEGIN_NV04(push, NV10_3D(RC_OUT_RGB(i)), 1); 394 PUSH_DATA (push, c_out); 395 396 context_dirty(ctx, FRAG); 397 } 398 399 void 400 nv10_emit_frag(struct gl_context *ctx, int emit) 401 { 402 struct nouveau_pushbuf *push = context_push(ctx); 403 uint64_t in; 404 int n; 405 406 nv10_get_final_combiner(ctx, &in, &n); 407 408 BEGIN_NV04(push, NV10_3D(RC_FINAL0), 2); 409 PUSH_DATA (push, in); 410 PUSH_DATA (push, in >> 32); 411 } 412
