1 /* 2 * Mesa 3-D graphics library 3 * 4 * Copyright (C) 1999-2007 Brian Paul All Rights Reserved. 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a 7 * copy of this software and associated documentation files (the "Software"), 8 * to deal in the Software without restriction, including without limitation 9 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 10 * and/or sell copies of the Software, and to permit persons to whom the 11 * Software is furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be included 14 * in all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 17 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR 20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 22 * OTHER DEALINGS IN THE SOFTWARE. 23 */ 24 25 26 /* 27 * When the device driver doesn't implement triangle rasterization it 28 * can hook in _swrast_Triangle, which eventually calls one of these 29 * functions to draw triangles. 30 */ 31 32 #include "main/glheader.h" 33 #include "main/context.h" 34 #include "main/imports.h" 35 #include "main/macros.h" 36 #include "main/mtypes.h" 37 #include "main/state.h" 38 #include "main/samplerobj.h" 39 #include "main/teximage.h" 40 #include "program/prog_instruction.h" 41 42 #include "s_aatriangle.h" 43 #include "s_context.h" 44 #include "s_feedback.h" 45 #include "s_span.h" 46 #include "s_triangle.h" 47 48 49 /** 50 * Test if a triangle should be culled. Used for feedback and selection mode. 51 * \return GL_TRUE if the triangle is to be culled, GL_FALSE otherwise. 52 */ 53 GLboolean 54 _swrast_culltriangle( struct gl_context *ctx, 55 const SWvertex *v0, 56 const SWvertex *v1, 57 const SWvertex *v2 ) 58 { 59 SWcontext *swrast = SWRAST_CONTEXT(ctx); 60 GLfloat ex = v1->attrib[VARYING_SLOT_POS][0] - v0->attrib[VARYING_SLOT_POS][0]; 61 GLfloat ey = v1->attrib[VARYING_SLOT_POS][1] - v0->attrib[VARYING_SLOT_POS][1]; 62 GLfloat fx = v2->attrib[VARYING_SLOT_POS][0] - v0->attrib[VARYING_SLOT_POS][0]; 63 GLfloat fy = v2->attrib[VARYING_SLOT_POS][1] - v0->attrib[VARYING_SLOT_POS][1]; 64 GLfloat c = ex*fy-ey*fx; 65 66 if (c * swrast->_BackfaceSign * swrast->_BackfaceCullSign <= 0.0F) 67 return GL_FALSE; 68 69 return GL_TRUE; 70 } 71 72 73 74 /* 75 * Render a flat-shaded RGBA triangle. 76 */ 77 #define NAME flat_rgba_triangle 78 #define INTERP_Z 1 79 #define SETUP_CODE \ 80 assert(ctx->Texture._EnabledCoordUnits == 0);\ 81 assert(ctx->Light.ShadeModel==GL_FLAT); \ 82 span.interpMask |= SPAN_RGBA; \ 83 span.red = ChanToFixed(v2->color[0]); \ 84 span.green = ChanToFixed(v2->color[1]); \ 85 span.blue = ChanToFixed(v2->color[2]); \ 86 span.alpha = ChanToFixed(v2->color[3]); \ 87 span.redStep = 0; \ 88 span.greenStep = 0; \ 89 span.blueStep = 0; \ 90 span.alphaStep = 0; 91 #define RENDER_SPAN( span ) _swrast_write_rgba_span(ctx, &span); 92 #include "s_tritemp.h" 93 94 95 96 /* 97 * Render a smooth-shaded RGBA triangle. 98 */ 99 #define NAME smooth_rgba_triangle 100 #define INTERP_Z 1 101 #define INTERP_RGB 1 102 #define INTERP_ALPHA 1 103 #define SETUP_CODE \ 104 { \ 105 /* texturing must be off */ \ 106 assert(ctx->Texture._EnabledCoordUnits == 0); \ 107 assert(ctx->Light.ShadeModel==GL_SMOOTH); \ 108 } 109 #define RENDER_SPAN( span ) _swrast_write_rgba_span(ctx, &span); 110 #include "s_tritemp.h" 111 112 113 114 /* 115 * Render an RGB, GL_DECAL, textured triangle. 116 * Interpolate S,T only w/out mipmapping or perspective correction. 117 * 118 * No fog. No depth testing. 119 */ 120 #define NAME simple_textured_triangle 121 #define INTERP_INT_TEX 1 122 #define S_SCALE twidth 123 #define T_SCALE theight 124 125 #define SETUP_CODE \ 126 struct gl_renderbuffer *rb = ctx->DrawBuffer->_ColorDrawBuffers[0]; \ 127 const struct gl_texture_object *obj = \ 128 ctx->Texture.Unit[0].CurrentTex[TEXTURE_2D_INDEX]; \ 129 const struct gl_texture_image *texImg = \ 130 _mesa_base_tex_image(obj); \ 131 const struct swrast_texture_image *swImg = \ 132 swrast_texture_image_const(texImg); \ 133 const GLfloat twidth = (GLfloat) texImg->Width; \ 134 const GLfloat theight = (GLfloat) texImg->Height; \ 135 const GLint twidth_log2 = texImg->WidthLog2; \ 136 const GLubyte *texture = (const GLubyte *) swImg->ImageSlices[0]; \ 137 const GLint smask = texImg->Width - 1; \ 138 const GLint tmask = texImg->Height - 1; \ 139 assert(texImg->TexFormat == MESA_FORMAT_BGR_UNORM8); \ 140 if (!rb || !texture) { \ 141 return; \ 142 } 143 144 #define RENDER_SPAN( span ) \ 145 GLuint i; \ 146 GLubyte (*rgba)[4] = swrast->SpanArrays->rgba8; \ 147 span.intTex[0] -= FIXED_HALF; /* off-by-one error? */ \ 148 span.intTex[1] -= FIXED_HALF; \ 149 for (i = 0; i < span.end; i++) { \ 150 GLint s = FixedToInt(span.intTex[0]) & smask; \ 151 GLint t = FixedToInt(span.intTex[1]) & tmask; \ 152 GLint pos = (t << twidth_log2) + s; \ 153 pos = pos + pos + pos; /* multiply by 3 */ \ 154 rgba[i][RCOMP] = texture[pos+2]; \ 155 rgba[i][GCOMP] = texture[pos+1]; \ 156 rgba[i][BCOMP] = texture[pos+0]; \ 157 rgba[i][ACOMP] = 0xff; \ 158 span.intTex[0] += span.intTexStep[0]; \ 159 span.intTex[1] += span.intTexStep[1]; \ 160 } \ 161 _swrast_put_row(ctx, rb, GL_UNSIGNED_BYTE, span.end, \ 162 span.x, span.y, rgba, NULL); 163 164 #include "s_tritemp.h" 165 166 167 168 /* 169 * Render an RGB, GL_DECAL, textured triangle. 170 * Interpolate S,T, GL_LESS depth test, w/out mipmapping or 171 * perspective correction. 172 * Depth buffer bits must be <= sizeof(DEFAULT_SOFTWARE_DEPTH_TYPE) 173 * 174 * No fog. 175 */ 176 #define NAME simple_z_textured_triangle 177 #define INTERP_Z 1 178 #define DEPTH_TYPE DEFAULT_SOFTWARE_DEPTH_TYPE 179 #define INTERP_INT_TEX 1 180 #define S_SCALE twidth 181 #define T_SCALE theight 182 183 #define SETUP_CODE \ 184 struct gl_renderbuffer *rb = ctx->DrawBuffer->_ColorDrawBuffers[0]; \ 185 const struct gl_texture_object *obj = \ 186 ctx->Texture.Unit[0].CurrentTex[TEXTURE_2D_INDEX]; \ 187 const struct gl_texture_image *texImg = \ 188 _mesa_base_tex_image(obj); \ 189 const struct swrast_texture_image *swImg = \ 190 swrast_texture_image_const(texImg); \ 191 const GLfloat twidth = (GLfloat) texImg->Width; \ 192 const GLfloat theight = (GLfloat) texImg->Height; \ 193 const GLint twidth_log2 = texImg->WidthLog2; \ 194 const GLubyte *texture = (const GLubyte *) swImg->ImageSlices[0]; \ 195 const GLint smask = texImg->Width - 1; \ 196 const GLint tmask = texImg->Height - 1; \ 197 assert(texImg->TexFormat == MESA_FORMAT_BGR_UNORM8); \ 198 if (!rb || !texture) { \ 199 return; \ 200 } 201 202 #define RENDER_SPAN( span ) \ 203 GLuint i; \ 204 GLubyte (*rgba)[4] = swrast->SpanArrays->rgba8; \ 205 GLubyte *mask = swrast->SpanArrays->mask; \ 206 span.intTex[0] -= FIXED_HALF; /* off-by-one error? */ \ 207 span.intTex[1] -= FIXED_HALF; \ 208 for (i = 0; i < span.end; i++) { \ 209 const GLuint z = FixedToDepth(span.z); \ 210 if (z < zRow[i]) { \ 211 GLint s = FixedToInt(span.intTex[0]) & smask; \ 212 GLint t = FixedToInt(span.intTex[1]) & tmask; \ 213 GLint pos = (t << twidth_log2) + s; \ 214 pos = pos + pos + pos; /* multiply by 3 */ \ 215 rgba[i][RCOMP] = texture[pos+2]; \ 216 rgba[i][GCOMP] = texture[pos+1]; \ 217 rgba[i][BCOMP] = texture[pos+0]; \ 218 rgba[i][ACOMP] = 0xff; \ 219 zRow[i] = z; \ 220 mask[i] = 1; \ 221 } \ 222 else { \ 223 mask[i] = 0; \ 224 } \ 225 span.intTex[0] += span.intTexStep[0]; \ 226 span.intTex[1] += span.intTexStep[1]; \ 227 span.z += span.zStep; \ 228 } \ 229 _swrast_put_row(ctx, rb, GL_UNSIGNED_BYTE, \ 230 span.end, span.x, span.y, rgba, mask); 231 232 #include "s_tritemp.h" 233 234 235 #if CHAN_TYPE != GL_FLOAT 236 237 struct affine_info 238 { 239 GLenum filter; 240 GLenum format; 241 GLenum envmode; 242 GLint smask, tmask; 243 GLint twidth_log2; 244 const GLchan *texture; 245 GLfixed er, eg, eb, ea; 246 GLint tbytesline, tsize; 247 }; 248 249 250 static inline GLint 251 ilerp(GLint t, GLint a, GLint b) 252 { 253 return a + ((t * (b - a)) >> FIXED_SHIFT); 254 } 255 256 static inline GLint 257 ilerp_2d(GLint ia, GLint ib, GLint v00, GLint v10, GLint v01, GLint v11) 258 { 259 const GLint temp0 = ilerp(ia, v00, v10); 260 const GLint temp1 = ilerp(ia, v01, v11); 261 return ilerp(ib, temp0, temp1); 262 } 263 264 265 /* This function can handle GL_NEAREST or GL_LINEAR sampling of 2D RGB or RGBA 266 * textures with GL_REPLACE, GL_MODULATE, GL_BLEND, GL_DECAL or GL_ADD 267 * texture env modes. 268 */ 269 static inline void 270 affine_span(struct gl_context *ctx, SWspan *span, 271 struct affine_info *info) 272 { 273 GLchan sample[4]; /* the filtered texture sample */ 274 const GLuint texEnableSave = ctx->Texture._EnabledCoordUnits; 275 276 /* Instead of defining a function for each mode, a test is done 277 * between the outer and inner loops. This is to reduce code size 278 * and complexity. Observe that an optimizing compiler kills 279 * unused variables (for instance tf,sf,ti,si in case of GL_NEAREST). 280 */ 281 282 #define NEAREST_RGB \ 283 sample[RCOMP] = tex00[2]; \ 284 sample[GCOMP] = tex00[1]; \ 285 sample[BCOMP] = tex00[0]; \ 286 sample[ACOMP] = CHAN_MAX; 287 288 #define LINEAR_RGB \ 289 sample[RCOMP] = ilerp_2d(sf, tf, tex00[2], tex01[2], tex10[2], tex11[2]);\ 290 sample[GCOMP] = ilerp_2d(sf, tf, tex00[1], tex01[1], tex10[1], tex11[1]);\ 291 sample[BCOMP] = ilerp_2d(sf, tf, tex00[0], tex01[0], tex10[0], tex11[0]);\ 292 sample[ACOMP] = CHAN_MAX; 293 294 #define NEAREST_RGBA \ 295 sample[RCOMP] = tex00[3]; \ 296 sample[GCOMP] = tex00[2]; \ 297 sample[BCOMP] = tex00[1]; \ 298 sample[ACOMP] = tex00[0]; 299 300 #define LINEAR_RGBA \ 301 sample[RCOMP] = ilerp_2d(sf, tf, tex00[3], tex01[3], tex10[3], tex11[3]);\ 302 sample[GCOMP] = ilerp_2d(sf, tf, tex00[2], tex01[2], tex10[2], tex11[2]);\ 303 sample[BCOMP] = ilerp_2d(sf, tf, tex00[1], tex01[1], tex10[1], tex11[1]);\ 304 sample[ACOMP] = ilerp_2d(sf, tf, tex00[0], tex01[0], tex10[0], tex11[0]) 305 306 #define MODULATE \ 307 dest[RCOMP] = span->red * (sample[RCOMP] + 1u) >> (FIXED_SHIFT + 8); \ 308 dest[GCOMP] = span->green * (sample[GCOMP] + 1u) >> (FIXED_SHIFT + 8); \ 309 dest[BCOMP] = span->blue * (sample[BCOMP] + 1u) >> (FIXED_SHIFT + 8); \ 310 dest[ACOMP] = span->alpha * (sample[ACOMP] + 1u) >> (FIXED_SHIFT + 8) 311 312 #define DECAL \ 313 dest[RCOMP] = ((CHAN_MAX - sample[ACOMP]) * span->red + \ 314 ((sample[ACOMP] + 1) * sample[RCOMP] << FIXED_SHIFT)) \ 315 >> (FIXED_SHIFT + 8); \ 316 dest[GCOMP] = ((CHAN_MAX - sample[ACOMP]) * span->green + \ 317 ((sample[ACOMP] + 1) * sample[GCOMP] << FIXED_SHIFT)) \ 318 >> (FIXED_SHIFT + 8); \ 319 dest[BCOMP] = ((CHAN_MAX - sample[ACOMP]) * span->blue + \ 320 ((sample[ACOMP] + 1) * sample[BCOMP] << FIXED_SHIFT)) \ 321 >> (FIXED_SHIFT + 8); \ 322 dest[ACOMP] = FixedToInt(span->alpha) 323 324 #define BLEND \ 325 dest[RCOMP] = ((CHAN_MAX - sample[RCOMP]) * span->red \ 326 + (sample[RCOMP] + 1) * info->er) >> (FIXED_SHIFT + 8); \ 327 dest[GCOMP] = ((CHAN_MAX - sample[GCOMP]) * span->green \ 328 + (sample[GCOMP] + 1) * info->eg) >> (FIXED_SHIFT + 8); \ 329 dest[BCOMP] = ((CHAN_MAX - sample[BCOMP]) * span->blue \ 330 + (sample[BCOMP] + 1) * info->eb) >> (FIXED_SHIFT + 8); \ 331 dest[ACOMP] = span->alpha * (sample[ACOMP] + 1) >> (FIXED_SHIFT + 8) 332 333 #define REPLACE COPY_CHAN4(dest, sample) 334 335 #define ADD \ 336 { \ 337 GLint rSum = FixedToInt(span->red) + (GLint) sample[RCOMP]; \ 338 GLint gSum = FixedToInt(span->green) + (GLint) sample[GCOMP]; \ 339 GLint bSum = FixedToInt(span->blue) + (GLint) sample[BCOMP]; \ 340 dest[RCOMP] = MIN2(rSum, CHAN_MAX); \ 341 dest[GCOMP] = MIN2(gSum, CHAN_MAX); \ 342 dest[BCOMP] = MIN2(bSum, CHAN_MAX); \ 343 dest[ACOMP] = span->alpha * (sample[ACOMP] + 1) >> (FIXED_SHIFT + 8); \ 344 } 345 346 /* shortcuts */ 347 348 #define NEAREST_RGB_REPLACE \ 349 NEAREST_RGB; \ 350 dest[0] = sample[0]; \ 351 dest[1] = sample[1]; \ 352 dest[2] = sample[2]; \ 353 dest[3] = FixedToInt(span->alpha); 354 355 #define NEAREST_RGBA_REPLACE \ 356 dest[RCOMP] = tex00[3]; \ 357 dest[GCOMP] = tex00[2]; \ 358 dest[BCOMP] = tex00[1]; \ 359 dest[ACOMP] = tex00[0] 360 361 #define SPAN_NEAREST(DO_TEX, COMPS) \ 362 for (i = 0; i < span->end; i++) { \ 363 /* Isn't it necessary to use FixedFloor below?? */ \ 364 GLint s = FixedToInt(span->intTex[0]) & info->smask; \ 365 GLint t = FixedToInt(span->intTex[1]) & info->tmask; \ 366 GLint pos = (t << info->twidth_log2) + s; \ 367 const GLchan *tex00 = info->texture + COMPS * pos; \ 368 DO_TEX; \ 369 span->red += span->redStep; \ 370 span->green += span->greenStep; \ 371 span->blue += span->blueStep; \ 372 span->alpha += span->alphaStep; \ 373 span->intTex[0] += span->intTexStep[0]; \ 374 span->intTex[1] += span->intTexStep[1]; \ 375 dest += 4; \ 376 } 377 378 #define SPAN_LINEAR(DO_TEX, COMPS) \ 379 for (i = 0; i < span->end; i++) { \ 380 /* Isn't it necessary to use FixedFloor below?? */ \ 381 const GLint s = FixedToInt(span->intTex[0]) & info->smask; \ 382 const GLint t = FixedToInt(span->intTex[1]) & info->tmask; \ 383 const GLfixed sf = span->intTex[0] & FIXED_FRAC_MASK; \ 384 const GLfixed tf = span->intTex[1] & FIXED_FRAC_MASK; \ 385 const GLint pos = (t << info->twidth_log2) + s; \ 386 const GLchan *tex00 = info->texture + COMPS * pos; \ 387 const GLchan *tex10 = tex00 + info->tbytesline; \ 388 const GLchan *tex01 = tex00 + COMPS; \ 389 const GLchan *tex11 = tex10 + COMPS; \ 390 if (t == info->tmask) { \ 391 tex10 -= info->tsize; \ 392 tex11 -= info->tsize; \ 393 } \ 394 if (s == info->smask) { \ 395 tex01 -= info->tbytesline; \ 396 tex11 -= info->tbytesline; \ 397 } \ 398 DO_TEX; \ 399 span->red += span->redStep; \ 400 span->green += span->greenStep; \ 401 span->blue += span->blueStep; \ 402 span->alpha += span->alphaStep; \ 403 span->intTex[0] += span->intTexStep[0]; \ 404 span->intTex[1] += span->intTexStep[1]; \ 405 dest += 4; \ 406 } 407 408 409 GLuint i; 410 GLchan *dest = span->array->rgba[0]; 411 412 /* Disable tex units so they're not re-applied in swrast_write_rgba_span */ 413 ctx->Texture._EnabledCoordUnits = 0x0; 414 415 span->intTex[0] -= FIXED_HALF; 416 span->intTex[1] -= FIXED_HALF; 417 switch (info->filter) { 418 case GL_NEAREST: 419 switch (info->format) { 420 case MESA_FORMAT_BGR_UNORM8: 421 switch (info->envmode) { 422 case GL_MODULATE: 423 SPAN_NEAREST(NEAREST_RGB;MODULATE,3); 424 break; 425 case GL_DECAL: 426 case GL_REPLACE: 427 SPAN_NEAREST(NEAREST_RGB_REPLACE,3); 428 break; 429 case GL_BLEND: 430 SPAN_NEAREST(NEAREST_RGB;BLEND,3); 431 break; 432 case GL_ADD: 433 SPAN_NEAREST(NEAREST_RGB;ADD,3); 434 break; 435 default: 436 _mesa_problem(ctx, "bad tex env mode in SPAN_LINEAR"); 437 return; 438 } 439 break; 440 case MESA_FORMAT_A8B8G8R8_UNORM: 441 switch(info->envmode) { 442 case GL_MODULATE: 443 SPAN_NEAREST(NEAREST_RGBA;MODULATE,4); 444 break; 445 case GL_DECAL: 446 SPAN_NEAREST(NEAREST_RGBA;DECAL,4); 447 break; 448 case GL_BLEND: 449 SPAN_NEAREST(NEAREST_RGBA;BLEND,4); 450 break; 451 case GL_ADD: 452 SPAN_NEAREST(NEAREST_RGBA;ADD,4); 453 break; 454 case GL_REPLACE: 455 SPAN_NEAREST(NEAREST_RGBA_REPLACE,4); 456 break; 457 default: 458 _mesa_problem(ctx, "bad tex env mode (2) in SPAN_LINEAR"); 459 return; 460 } 461 break; 462 } 463 break; 464 465 case GL_LINEAR: 466 span->intTex[0] -= FIXED_HALF; 467 span->intTex[1] -= FIXED_HALF; 468 switch (info->format) { 469 case MESA_FORMAT_BGR_UNORM8: 470 switch (info->envmode) { 471 case GL_MODULATE: 472 SPAN_LINEAR(LINEAR_RGB;MODULATE,3); 473 break; 474 case GL_DECAL: 475 case GL_REPLACE: 476 SPAN_LINEAR(LINEAR_RGB;REPLACE,3); 477 break; 478 case GL_BLEND: 479 SPAN_LINEAR(LINEAR_RGB;BLEND,3); 480 break; 481 case GL_ADD: 482 SPAN_LINEAR(LINEAR_RGB;ADD,3); 483 break; 484 default: 485 _mesa_problem(ctx, "bad tex env mode (3) in SPAN_LINEAR"); 486 return; 487 } 488 break; 489 case MESA_FORMAT_A8B8G8R8_UNORM: 490 switch (info->envmode) { 491 case GL_MODULATE: 492 SPAN_LINEAR(LINEAR_RGBA;MODULATE,4); 493 break; 494 case GL_DECAL: 495 SPAN_LINEAR(LINEAR_RGBA;DECAL,4); 496 break; 497 case GL_BLEND: 498 SPAN_LINEAR(LINEAR_RGBA;BLEND,4); 499 break; 500 case GL_ADD: 501 SPAN_LINEAR(LINEAR_RGBA;ADD,4); 502 break; 503 case GL_REPLACE: 504 SPAN_LINEAR(LINEAR_RGBA;REPLACE,4); 505 break; 506 default: 507 _mesa_problem(ctx, "bad tex env mode (4) in SPAN_LINEAR"); 508 return; 509 } 510 break; 511 } 512 break; 513 } 514 span->interpMask &= ~SPAN_RGBA; 515 assert(span->arrayMask & SPAN_RGBA); 516 517 _swrast_write_rgba_span(ctx, span); 518 519 /* re-enable texture units */ 520 ctx->Texture._EnabledCoordUnits = texEnableSave; 521 522 #undef SPAN_NEAREST 523 #undef SPAN_LINEAR 524 } 525 526 527 528 /* 529 * Render an RGB/RGBA textured triangle without perspective correction. 530 */ 531 #define NAME affine_textured_triangle 532 #define INTERP_Z 1 533 #define INTERP_RGB 1 534 #define INTERP_ALPHA 1 535 #define INTERP_INT_TEX 1 536 #define S_SCALE twidth 537 #define T_SCALE theight 538 539 #define SETUP_CODE \ 540 struct affine_info info; \ 541 struct gl_texture_unit *unit = ctx->Texture.Unit+0; \ 542 const struct gl_texture_object *obj = \ 543 ctx->Texture.Unit[0].CurrentTex[TEXTURE_2D_INDEX]; \ 544 const struct gl_texture_image *texImg = \ 545 _mesa_base_tex_image(obj); \ 546 const struct swrast_texture_image *swImg = \ 547 swrast_texture_image_const(texImg); \ 548 const GLfloat twidth = (GLfloat) texImg->Width; \ 549 const GLfloat theight = (GLfloat) texImg->Height; \ 550 info.texture = (const GLchan *) swImg->ImageSlices[0]; \ 551 info.twidth_log2 = texImg->WidthLog2; \ 552 info.smask = texImg->Width - 1; \ 553 info.tmask = texImg->Height - 1; \ 554 info.format = texImg->TexFormat; \ 555 info.filter = obj->Sampler.MinFilter; \ 556 info.envmode = unit->EnvMode; \ 557 info.er = 0; \ 558 info.eg = 0; \ 559 info.eb = 0; \ 560 span.arrayMask |= SPAN_RGBA; \ 561 \ 562 if (info.envmode == GL_BLEND) { \ 563 /* potential off-by-one error here? (1.0f -> 2048 -> 0) */ \ 564 info.er = FloatToFixed(unit->EnvColor[RCOMP] * CHAN_MAXF); \ 565 info.eg = FloatToFixed(unit->EnvColor[GCOMP] * CHAN_MAXF); \ 566 info.eb = FloatToFixed(unit->EnvColor[BCOMP] * CHAN_MAXF); \ 567 info.ea = FloatToFixed(unit->EnvColor[ACOMP] * CHAN_MAXF); \ 568 } \ 569 if (!info.texture) { \ 570 /* this shouldn't happen */ \ 571 return; \ 572 } \ 573 \ 574 switch (info.format) { \ 575 case MESA_FORMAT_BGR_UNORM8: \ 576 info.tbytesline = texImg->Width * 3; \ 577 break; \ 578 case MESA_FORMAT_A8B8G8R8_UNORM: \ 579 info.tbytesline = texImg->Width * 4; \ 580 break; \ 581 default: \ 582 _mesa_problem(NULL, "Bad texture format in affine_texture_triangle");\ 583 return; \ 584 } \ 585 info.tsize = texImg->Height * info.tbytesline; 586 587 #define RENDER_SPAN( span ) affine_span(ctx, &span, &info); 588 589 #include "s_tritemp.h" 590 591 592 593 struct persp_info 594 { 595 GLenum filter; 596 GLenum format; 597 GLenum envmode; 598 GLint smask, tmask; 599 GLint twidth_log2; 600 const GLchan *texture; 601 GLfixed er, eg, eb, ea; /* texture env color */ 602 GLint tbytesline, tsize; 603 }; 604 605 606 static inline void 607 fast_persp_span(struct gl_context *ctx, SWspan *span, 608 struct persp_info *info) 609 { 610 GLchan sample[4]; /* the filtered texture sample */ 611 612 /* Instead of defining a function for each mode, a test is done 613 * between the outer and inner loops. This is to reduce code size 614 * and complexity. Observe that an optimizing compiler kills 615 * unused variables (for instance tf,sf,ti,si in case of GL_NEAREST). 616 */ 617 #define SPAN_NEAREST(DO_TEX,COMP) \ 618 for (i = 0; i < span->end; i++) { \ 619 GLdouble invQ = tex_coord[2] ? \ 620 (1.0 / tex_coord[2]) : 1.0; \ 621 GLfloat s_tmp = (GLfloat) (tex_coord[0] * invQ); \ 622 GLfloat t_tmp = (GLfloat) (tex_coord[1] * invQ); \ 623 GLint s = IFLOOR(s_tmp) & info->smask; \ 624 GLint t = IFLOOR(t_tmp) & info->tmask; \ 625 GLint pos = (t << info->twidth_log2) + s; \ 626 const GLchan *tex00 = info->texture + COMP * pos; \ 627 DO_TEX; \ 628 span->red += span->redStep; \ 629 span->green += span->greenStep; \ 630 span->blue += span->blueStep; \ 631 span->alpha += span->alphaStep; \ 632 tex_coord[0] += tex_step[0]; \ 633 tex_coord[1] += tex_step[1]; \ 634 tex_coord[2] += tex_step[2]; \ 635 dest += 4; \ 636 } 637 638 #define SPAN_LINEAR(DO_TEX,COMP) \ 639 for (i = 0; i < span->end; i++) { \ 640 GLdouble invQ = tex_coord[2] ? \ 641 (1.0 / tex_coord[2]) : 1.0; \ 642 const GLfloat s_tmp = (GLfloat) (tex_coord[0] * invQ); \ 643 const GLfloat t_tmp = (GLfloat) (tex_coord[1] * invQ); \ 644 const GLfixed s_fix = FloatToFixed(s_tmp) - FIXED_HALF; \ 645 const GLfixed t_fix = FloatToFixed(t_tmp) - FIXED_HALF; \ 646 const GLint s = FixedToInt(FixedFloor(s_fix)) & info->smask; \ 647 const GLint t = FixedToInt(FixedFloor(t_fix)) & info->tmask; \ 648 const GLfixed sf = s_fix & FIXED_FRAC_MASK; \ 649 const GLfixed tf = t_fix & FIXED_FRAC_MASK; \ 650 const GLint pos = (t << info->twidth_log2) + s; \ 651 const GLchan *tex00 = info->texture + COMP * pos; \ 652 const GLchan *tex10 = tex00 + info->tbytesline; \ 653 const GLchan *tex01 = tex00 + COMP; \ 654 const GLchan *tex11 = tex10 + COMP; \ 655 if (t == info->tmask) { \ 656 tex10 -= info->tsize; \ 657 tex11 -= info->tsize; \ 658 } \ 659 if (s == info->smask) { \ 660 tex01 -= info->tbytesline; \ 661 tex11 -= info->tbytesline; \ 662 } \ 663 DO_TEX; \ 664 span->red += span->redStep; \ 665 span->green += span->greenStep; \ 666 span->blue += span->blueStep; \ 667 span->alpha += span->alphaStep; \ 668 tex_coord[0] += tex_step[0]; \ 669 tex_coord[1] += tex_step[1]; \ 670 tex_coord[2] += tex_step[2]; \ 671 dest += 4; \ 672 } 673 674 GLuint i; 675 GLfloat tex_coord[3], tex_step[3]; 676 GLchan *dest = span->array->rgba[0]; 677 678 const GLuint texEnableSave = ctx->Texture._EnabledCoordUnits; 679 ctx->Texture._EnabledCoordUnits = 0; 680 681 tex_coord[0] = span->attrStart[VARYING_SLOT_TEX0][0] * (info->smask + 1); 682 tex_step[0] = span->attrStepX[VARYING_SLOT_TEX0][0] * (info->smask + 1); 683 tex_coord[1] = span->attrStart[VARYING_SLOT_TEX0][1] * (info->tmask + 1); 684 tex_step[1] = span->attrStepX[VARYING_SLOT_TEX0][1] * (info->tmask + 1); 685 /* span->attrStart[VARYING_SLOT_TEX0][2] only if 3D-texturing, here only 2D */ 686 tex_coord[2] = span->attrStart[VARYING_SLOT_TEX0][3]; 687 tex_step[2] = span->attrStepX[VARYING_SLOT_TEX0][3]; 688 689 switch (info->filter) { 690 case GL_NEAREST: 691 switch (info->format) { 692 case MESA_FORMAT_BGR_UNORM8: 693 switch (info->envmode) { 694 case GL_MODULATE: 695 SPAN_NEAREST(NEAREST_RGB;MODULATE,3); 696 break; 697 case GL_DECAL: 698 case GL_REPLACE: 699 SPAN_NEAREST(NEAREST_RGB_REPLACE,3); 700 break; 701 case GL_BLEND: 702 SPAN_NEAREST(NEAREST_RGB;BLEND,3); 703 break; 704 case GL_ADD: 705 SPAN_NEAREST(NEAREST_RGB;ADD,3); 706 break; 707 default: 708 _mesa_problem(ctx, "bad tex env mode (5) in SPAN_LINEAR"); 709 return; 710 } 711 break; 712 case MESA_FORMAT_A8B8G8R8_UNORM: 713 switch(info->envmode) { 714 case GL_MODULATE: 715 SPAN_NEAREST(NEAREST_RGBA;MODULATE,4); 716 break; 717 case GL_DECAL: 718 SPAN_NEAREST(NEAREST_RGBA;DECAL,4); 719 break; 720 case GL_BLEND: 721 SPAN_NEAREST(NEAREST_RGBA;BLEND,4); 722 break; 723 case GL_ADD: 724 SPAN_NEAREST(NEAREST_RGBA;ADD,4); 725 break; 726 case GL_REPLACE: 727 SPAN_NEAREST(NEAREST_RGBA_REPLACE,4); 728 break; 729 default: 730 _mesa_problem(ctx, "bad tex env mode (6) in SPAN_LINEAR"); 731 return; 732 } 733 break; 734 } 735 break; 736 737 case GL_LINEAR: 738 switch (info->format) { 739 case MESA_FORMAT_BGR_UNORM8: 740 switch (info->envmode) { 741 case GL_MODULATE: 742 SPAN_LINEAR(LINEAR_RGB;MODULATE,3); 743 break; 744 case GL_DECAL: 745 case GL_REPLACE: 746 SPAN_LINEAR(LINEAR_RGB;REPLACE,3); 747 break; 748 case GL_BLEND: 749 SPAN_LINEAR(LINEAR_RGB;BLEND,3); 750 break; 751 case GL_ADD: 752 SPAN_LINEAR(LINEAR_RGB;ADD,3); 753 break; 754 default: 755 _mesa_problem(ctx, "bad tex env mode (7) in SPAN_LINEAR"); 756 return; 757 } 758 break; 759 case MESA_FORMAT_A8B8G8R8_UNORM: 760 switch (info->envmode) { 761 case GL_MODULATE: 762 SPAN_LINEAR(LINEAR_RGBA;MODULATE,4); 763 break; 764 case GL_DECAL: 765 SPAN_LINEAR(LINEAR_RGBA;DECAL,4); 766 break; 767 case GL_BLEND: 768 SPAN_LINEAR(LINEAR_RGBA;BLEND,4); 769 break; 770 case GL_ADD: 771 SPAN_LINEAR(LINEAR_RGBA;ADD,4); 772 break; 773 case GL_REPLACE: 774 SPAN_LINEAR(LINEAR_RGBA;REPLACE,4); 775 break; 776 default: 777 _mesa_problem(ctx, "bad tex env mode (8) in SPAN_LINEAR"); 778 return; 779 } 780 break; 781 } 782 break; 783 } 784 785 assert(span->arrayMask & SPAN_RGBA); 786 _swrast_write_rgba_span(ctx, span); 787 788 #undef SPAN_NEAREST 789 #undef SPAN_LINEAR 790 791 /* restore state */ 792 ctx->Texture._EnabledCoordUnits = texEnableSave; 793 } 794 795 796 /* 797 * Render an perspective corrected RGB/RGBA textured triangle. 798 * The Q (aka V in Mesa) coordinate must be zero such that the divide 799 * by interpolated Q/W comes out right. 800 * 801 */ 802 #define NAME persp_textured_triangle 803 #define INTERP_Z 1 804 #define INTERP_RGB 1 805 #define INTERP_ALPHA 1 806 #define INTERP_ATTRIBS 1 807 808 #define SETUP_CODE \ 809 struct persp_info info; \ 810 const struct gl_texture_unit *unit = ctx->Texture.Unit+0; \ 811 const struct gl_texture_object *obj = \ 812 ctx->Texture.Unit[0].CurrentTex[TEXTURE_2D_INDEX]; \ 813 const struct gl_texture_image *texImg = \ 814 _mesa_base_tex_image(obj); \ 815 const struct swrast_texture_image *swImg = \ 816 swrast_texture_image_const(texImg); \ 817 info.texture = (const GLchan *) swImg->ImageSlices[0]; \ 818 info.twidth_log2 = texImg->WidthLog2; \ 819 info.smask = texImg->Width - 1; \ 820 info.tmask = texImg->Height - 1; \ 821 info.format = texImg->TexFormat; \ 822 info.filter = obj->Sampler.MinFilter; \ 823 info.envmode = unit->EnvMode; \ 824 info.er = 0; \ 825 info.eg = 0; \ 826 info.eb = 0; \ 827 \ 828 if (info.envmode == GL_BLEND) { \ 829 /* potential off-by-one error here? (1.0f -> 2048 -> 0) */ \ 830 info.er = FloatToFixed(unit->EnvColor[RCOMP] * CHAN_MAXF); \ 831 info.eg = FloatToFixed(unit->EnvColor[GCOMP] * CHAN_MAXF); \ 832 info.eb = FloatToFixed(unit->EnvColor[BCOMP] * CHAN_MAXF); \ 833 info.ea = FloatToFixed(unit->EnvColor[ACOMP] * CHAN_MAXF); \ 834 } \ 835 if (!info.texture) { \ 836 /* this shouldn't happen */ \ 837 return; \ 838 } \ 839 \ 840 switch (info.format) { \ 841 case MESA_FORMAT_BGR_UNORM8: \ 842 info.tbytesline = texImg->Width * 3; \ 843 break; \ 844 case MESA_FORMAT_A8B8G8R8_UNORM: \ 845 info.tbytesline = texImg->Width * 4; \ 846 break; \ 847 default: \ 848 _mesa_problem(NULL, "Bad texture format in persp_textured_triangle");\ 849 return; \ 850 } \ 851 info.tsize = texImg->Height * info.tbytesline; 852 853 #define RENDER_SPAN( span ) \ 854 span.interpMask &= ~SPAN_RGBA; \ 855 span.arrayMask |= SPAN_RGBA; \ 856 fast_persp_span(ctx, &span, &info); 857 858 #include "s_tritemp.h" 859 860 #endif /*CHAN_TYPE != GL_FLOAT*/ 861 862 863 864 /* 865 * Render an RGBA triangle with arbitrary attributes. 866 */ 867 #define NAME general_triangle 868 #define INTERP_Z 1 869 #define INTERP_RGB 1 870 #define INTERP_ALPHA 1 871 #define INTERP_ATTRIBS 1 872 #define RENDER_SPAN( span ) _swrast_write_rgba_span(ctx, &span); 873 #include "s_tritemp.h" 874 875 876 877 878 /* 879 * Special tri function for occlusion testing 880 */ 881 #define NAME occlusion_zless_16_triangle 882 #define INTERP_Z 1 883 #define SETUP_CODE \ 884 struct gl_renderbuffer *rb = \ 885 ctx->DrawBuffer->Attachment[BUFFER_DEPTH].Renderbuffer; \ 886 struct gl_query_object *q = ctx->Query.CurrentOcclusionObject; \ 887 assert(ctx->Depth.Test); \ 888 assert(!ctx->Depth.Mask); \ 889 assert(ctx->Depth.Func == GL_LESS); \ 890 assert(rb->Format == MESA_FORMAT_Z_UNORM16); \ 891 if (!q) { \ 892 return; \ 893 } 894 #define RENDER_SPAN( span ) \ 895 { \ 896 GLuint i; \ 897 const GLushort *zRow = (const GLushort *) \ 898 _swrast_pixel_address(rb, span.x, span.y); \ 899 for (i = 0; i < span.end; i++) { \ 900 GLuint z = FixedToDepth(span.z); \ 901 if (z < zRow[i]) { \ 902 q->Result++; \ 903 } \ 904 span.z += span.zStep; \ 905 } \ 906 } 907 #include "s_tritemp.h" 908 909 910 911 static void 912 nodraw_triangle( struct gl_context *ctx, 913 const SWvertex *v0, 914 const SWvertex *v1, 915 const SWvertex *v2 ) 916 { 917 (void) (ctx && v0 && v1 && v2); 918 } 919 920 921 /* 922 * This is used when separate specular color is enabled, but not 923 * texturing. We add the specular color to the primary color, 924 * draw the triangle, then restore the original primary color. 925 * Inefficient, but seldom needed. 926 */ 927 void 928 _swrast_add_spec_terms_triangle(struct gl_context *ctx, const SWvertex *v0, 929 const SWvertex *v1, const SWvertex *v2) 930 { 931 SWvertex *ncv0 = (SWvertex *)v0; /* drop const qualifier */ 932 SWvertex *ncv1 = (SWvertex *)v1; 933 SWvertex *ncv2 = (SWvertex *)v2; 934 GLfloat rSum, gSum, bSum; 935 GLchan cSave[3][4]; 936 937 /* save original colors */ 938 COPY_CHAN4( cSave[0], ncv0->color ); 939 COPY_CHAN4( cSave[1], ncv1->color ); 940 COPY_CHAN4( cSave[2], ncv2->color ); 941 /* sum v0 */ 942 rSum = CHAN_TO_FLOAT(ncv0->color[0]) + ncv0->attrib[VARYING_SLOT_COL1][0]; 943 gSum = CHAN_TO_FLOAT(ncv0->color[1]) + ncv0->attrib[VARYING_SLOT_COL1][1]; 944 bSum = CHAN_TO_FLOAT(ncv0->color[2]) + ncv0->attrib[VARYING_SLOT_COL1][2]; 945 UNCLAMPED_FLOAT_TO_CHAN(ncv0->color[0], rSum); 946 UNCLAMPED_FLOAT_TO_CHAN(ncv0->color[1], gSum); 947 UNCLAMPED_FLOAT_TO_CHAN(ncv0->color[2], bSum); 948 /* sum v1 */ 949 rSum = CHAN_TO_FLOAT(ncv1->color[0]) + ncv1->attrib[VARYING_SLOT_COL1][0]; 950 gSum = CHAN_TO_FLOAT(ncv1->color[1]) + ncv1->attrib[VARYING_SLOT_COL1][1]; 951 bSum = CHAN_TO_FLOAT(ncv1->color[2]) + ncv1->attrib[VARYING_SLOT_COL1][2]; 952 UNCLAMPED_FLOAT_TO_CHAN(ncv1->color[0], rSum); 953 UNCLAMPED_FLOAT_TO_CHAN(ncv1->color[1], gSum); 954 UNCLAMPED_FLOAT_TO_CHAN(ncv1->color[2], bSum); 955 /* sum v2 */ 956 rSum = CHAN_TO_FLOAT(ncv2->color[0]) + ncv2->attrib[VARYING_SLOT_COL1][0]; 957 gSum = CHAN_TO_FLOAT(ncv2->color[1]) + ncv2->attrib[VARYING_SLOT_COL1][1]; 958 bSum = CHAN_TO_FLOAT(ncv2->color[2]) + ncv2->attrib[VARYING_SLOT_COL1][2]; 959 UNCLAMPED_FLOAT_TO_CHAN(ncv2->color[0], rSum); 960 UNCLAMPED_FLOAT_TO_CHAN(ncv2->color[1], gSum); 961 UNCLAMPED_FLOAT_TO_CHAN(ncv2->color[2], bSum); 962 /* draw */ 963 SWRAST_CONTEXT(ctx)->SpecTriangle( ctx, ncv0, ncv1, ncv2 ); 964 /* restore original colors */ 965 COPY_CHAN4( ncv0->color, cSave[0] ); 966 COPY_CHAN4( ncv1->color, cSave[1] ); 967 COPY_CHAN4( ncv2->color, cSave[2] ); 968 } 969 970 971 972 #ifdef DEBUG 973 974 /* record the current triangle function name */ 975 const char *_mesa_triFuncName = NULL; 976 977 #define USE(triFunc) \ 978 do { \ 979 _mesa_triFuncName = #triFunc; \ 980 /*printf("%s\n", _mesa_triFuncName);*/ \ 981 swrast->Triangle = triFunc; \ 982 } while (0) 983 984 #else 985 986 #define USE(triFunc) swrast->Triangle = triFunc; 987 988 #endif 989 990 991 992 993 /* 994 * Determine which triangle rendering function to use given the current 995 * rendering context. 996 * 997 * Please update the summary flag _SWRAST_NEW_TRIANGLE if you add or 998 * remove tests to this code. 999 */ 1000 void 1001 _swrast_choose_triangle( struct gl_context *ctx ) 1002 { 1003 SWcontext *swrast = SWRAST_CONTEXT(ctx); 1004 1005 if (ctx->Polygon.CullFlag && 1006 ctx->Polygon.CullFaceMode == GL_FRONT_AND_BACK) { 1007 USE(nodraw_triangle); 1008 return; 1009 } 1010 1011 if (ctx->RenderMode==GL_RENDER) { 1012 struct gl_renderbuffer *depthRb = 1013 ctx->DrawBuffer->Attachment[BUFFER_DEPTH].Renderbuffer; 1014 1015 if (ctx->Polygon.SmoothFlag) { 1016 _swrast_set_aa_triangle_function(ctx); 1017 assert(swrast->Triangle); 1018 return; 1019 } 1020 1021 /* special case for occlusion testing */ 1022 if (ctx->Query.CurrentOcclusionObject && 1023 ctx->Depth.Test && 1024 ctx->Depth.Mask == GL_FALSE && 1025 ctx->Depth.Func == GL_LESS && 1026 !ctx->Stencil._Enabled && 1027 depthRb && 1028 depthRb->Format == MESA_FORMAT_Z_UNORM16) { 1029 if (ctx->Color.ColorMask[0][0] == 0 && 1030 ctx->Color.ColorMask[0][1] == 0 && 1031 ctx->Color.ColorMask[0][2] == 0 && 1032 ctx->Color.ColorMask[0][3] == 0) { 1033 USE(occlusion_zless_16_triangle); 1034 return; 1035 } 1036 } 1037 1038 /* 1039 * XXX should examine swrast->_ActiveAttribMask to determine what 1040 * needs to be interpolated. 1041 */ 1042 if (ctx->Texture._EnabledCoordUnits || 1043 _swrast_use_fragment_program(ctx) || 1044 ctx->ATIFragmentShader._Enabled || 1045 _mesa_need_secondary_color(ctx) || 1046 swrast->_FogEnabled) { 1047 /* Ugh, we do a _lot_ of tests to pick the best textured tri func */ 1048 const struct gl_texture_object *texObj2D; 1049 const struct gl_sampler_object *samp; 1050 const struct gl_texture_image *texImg; 1051 const struct swrast_texture_image *swImg; 1052 GLenum minFilter, magFilter, envMode; 1053 mesa_format format; 1054 texObj2D = ctx->Texture.Unit[0].CurrentTex[TEXTURE_2D_INDEX]; 1055 if (ctx->Texture.Unit[0].Sampler) 1056 samp = ctx->Texture.Unit[0].Sampler; 1057 else if (texObj2D) 1058 samp = &texObj2D->Sampler; 1059 else 1060 samp = NULL; 1061 1062 texImg = texObj2D ? _mesa_base_tex_image(texObj2D) : NULL; 1063 swImg = swrast_texture_image_const(texImg); 1064 1065 format = texImg ? texImg->TexFormat : MESA_FORMAT_NONE; 1066 minFilter = texObj2D ? samp->MinFilter : GL_NONE; 1067 magFilter = texObj2D ? samp->MagFilter : GL_NONE; 1068 envMode = ctx->Texture.Unit[0].EnvMode; 1069 1070 /* First see if we can use an optimized 2-D texture function */ 1071 if (ctx->Texture._EnabledCoordUnits == 0x1 1072 && !_swrast_use_fragment_program(ctx) 1073 && !ctx->ATIFragmentShader._Enabled 1074 && ctx->Texture._MaxEnabledTexImageUnit == 0 1075 && ctx->Texture.Unit[0]._Current->Target == GL_TEXTURE_2D 1076 && samp->WrapS == GL_REPEAT 1077 && samp->WrapT == GL_REPEAT 1078 && texObj2D->_Swizzle == SWIZZLE_NOOP 1079 && swImg->_IsPowerOfTwo 1080 && texImg->Border == 0 1081 && (_mesa_format_row_stride(format, texImg->Width) == 1082 swImg->RowStride) 1083 && (format == MESA_FORMAT_BGR_UNORM8 || format == MESA_FORMAT_A8B8G8R8_UNORM) 1084 && minFilter == magFilter 1085 && ctx->Light.Model.ColorControl == GL_SINGLE_COLOR 1086 && !swrast->_FogEnabled 1087 && ctx->Texture.Unit[0].EnvMode != GL_COMBINE_EXT 1088 && ctx->Texture.Unit[0].EnvMode != GL_COMBINE4_NV) { 1089 if (ctx->Hint.PerspectiveCorrection==GL_FASTEST) { 1090 if (minFilter == GL_NEAREST 1091 && format == MESA_FORMAT_BGR_UNORM8 1092 && (envMode == GL_REPLACE || envMode == GL_DECAL) 1093 && ((swrast->_RasterMask == (DEPTH_BIT | TEXTURE_BIT) 1094 && ctx->Depth.Func == GL_LESS 1095 && ctx->Depth.Mask == GL_TRUE) 1096 || swrast->_RasterMask == TEXTURE_BIT) 1097 && ctx->Polygon.StippleFlag == GL_FALSE 1098 && ctx->DrawBuffer->Visual.depthBits <= 16) { 1099 if (swrast->_RasterMask == (DEPTH_BIT | TEXTURE_BIT)) { 1100 USE(simple_z_textured_triangle); 1101 } 1102 else { 1103 USE(simple_textured_triangle); 1104 } 1105 } 1106 else { 1107 #if CHAN_BITS != 8 1108 USE(general_triangle); 1109 #else 1110 if (format == MESA_FORMAT_A8B8G8R8_UNORM && !_mesa_little_endian()) { 1111 /* We only handle RGBA8888 correctly on little endian 1112 * in the optimized code above. 1113 */ 1114 USE(general_triangle); 1115 } 1116 else { 1117 USE(affine_textured_triangle); 1118 } 1119 #endif 1120 } 1121 } 1122 else { 1123 #if CHAN_BITS != 8 1124 USE(general_triangle); 1125 #else 1126 USE(persp_textured_triangle); 1127 #endif 1128 } 1129 } 1130 else { 1131 /* general case textured triangles */ 1132 USE(general_triangle); 1133 } 1134 } 1135 else { 1136 assert(!swrast->_FogEnabled); 1137 assert(!_mesa_need_secondary_color(ctx)); 1138 if (ctx->Light.ShadeModel==GL_SMOOTH) { 1139 /* smooth shaded, no texturing, stippled or some raster ops */ 1140 #if CHAN_BITS != 8 1141 USE(general_triangle); 1142 #else 1143 USE(smooth_rgba_triangle); 1144 #endif 1145 } 1146 else { 1147 /* flat shaded, no texturing, stippled or some raster ops */ 1148 #if CHAN_BITS != 8 1149 USE(general_triangle); 1150 #else 1151 USE(flat_rgba_triangle); 1152 #endif 1153 } 1154 } 1155 } 1156 else if (ctx->RenderMode==GL_FEEDBACK) { 1157 USE(_swrast_feedback_triangle); 1158 } 1159 else { 1160 /* GL_SELECT mode */ 1161 USE(_swrast_select_triangle); 1162 } 1163 } 1164
