src/mesa/drivers/glide/fxdd.c

   1 /* $Id: fxdd.c,v 1.86 2002/06/13 04:28:30 brianp Exp $ */
   2
   3 /*
   4  * Mesa 3-D graphics library
   5  * Version:  4.0
   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  *    David Bucciarelli
  29  *    Brian Paul
  30  *    Daryll Strauss
  31  *    Keith Whitwell
  32  */
  33
  34 /* fxdd.c - 3Dfx VooDoo Mesa device driver functions */
  35
  36
  37 #ifdef HAVE_CONFIG_H
  38 #include "conf.h"
  39 #endif
  40
  41 #if defined(FX)
  42
  43 #include "image.h"
  44 #include "mtypes.h"
  45 #include "fxdrv.h"
  46 #include "enums.h"
  47 #include "extensions.h"
  48 #include "texstore.h"
  49 #include "swrast/swrast.h"
  50 #include "swrast_setup/swrast_setup.h"
  51 #include "tnl/tnl.h"
  52 #include "tnl/t_context.h"
  53 #include "tnl/t_pipeline.h"
  54 #include "array_cache/acache.h"
  55
  56
  57
  58 float gl_ubyte_to_float_255_color_tab[256];
  59
  60 /* These lookup table are used to extract RGB values in [0,255] from
  61  * 16-bit pixel values.
  62  */
  63 GLubyte FX_PixelToR[0x10000];
  64 GLubyte FX_PixelToG[0x10000];
  65 GLubyte FX_PixelToB[0x10000];
  66
  67
  68 /*
  69  * Initialize the FX_PixelTo{RGB} arrays.
  70  * Input: bgrOrder - if TRUE, pixels are in BGR order, else RGB order.
  71  */
  72 void
  73 fxInitPixelTables(fxMesaContext fxMesa, GLboolean bgrOrder)
  74 {
  75    GLuint pixel;
  76
  77    fxMesa->bgrOrder = bgrOrder;
  78    for (pixel = 0; pixel <= 0xffff; pixel++) {
  79       GLuint r, g, b;
  80       if (bgrOrder) {
  81          r = (pixel & 0x001F) << 3;
  82          g = (pixel & 0x07E0) >> 3;
  83          b = (pixel & 0xF800) >> 8;
  84       }
  85       else {
  86          r = (pixel & 0xF800) >> 8;
  87          g = (pixel & 0x07E0) >> 3;
  88          b = (pixel & 0x001F) << 3;
  89       }
  90       r = r * 255 / 0xF8;       /* fill in low-order bits */
  91       g = g * 255 / 0xFC;
  92       b = b * 255 / 0xF8;
  93       FX_PixelToR[pixel] = r;
  94       FX_PixelToG[pixel] = g;
  95       FX_PixelToB[pixel] = b;
  96    }
  97 }
  98
  99
 100 /**********************************************************************/
 101 /*****                 Miscellaneous functions                    *****/
 102 /**********************************************************************/
 103
 104 /* Return buffer size information */
 105 static void
 106 fxDDBufferSize(GLframebuffer *buffer, GLuint * width, GLuint * height)
 107 {
 108    GET_CURRENT_CONTEXT(ctx);
 109    if (ctx && ctx->DriverCtx) {
 110       fxMesaContext fxMesa = (fxMesaContext) ctx->DriverCtx;
 111
 112       if (MESA_VERBOSE & VERBOSE_DRIVER) {
 113          fprintf(stderr, "fxmesa: fxDDBufferSize(...) Start\n");
 114       }
 115
 116       *width = fxMesa->width;
 117       *height = fxMesa->height;
 118
 119       if (MESA_VERBOSE & VERBOSE_DRIVER) {
 120          fprintf(stderr, "fxmesa: fxDDBufferSize(...) End\n");
 121       }
 122    }
 123 }
 124
 125
 126 /* Implements glClearColor() */
 127 static void
 128 fxDDClearColor(GLcontext * ctx, const GLchan color[4])
 129 {
 130    fxMesaContext fxMesa = (fxMesaContext) ctx->DriverCtx;
 131    GLubyte col[4];
 132
 133    if (MESA_VERBOSE & VERBOSE_DRIVER) {
 134       fprintf(stderr, "fxmesa: fxDDClearColor(%d,%d,%d,%d)\n",
 135               color[0], color[1], color[2], color[3]);
 136    }
 137
 138    ASSIGN_4V(col, color[0], color[1], color[2], 255);
 139    fxMesa->clearC = FXCOLOR4(col);
 140    fxMesa->clearA = color[3];
 141 }
 142
 143
 144 /* Clear the color and/or depth buffers */
 145 static void
 146 fxDDClear(GLcontext * ctx, GLbitfield mask, GLboolean all,
 147           GLint x, GLint y, GLint width, GLint height)
 148 {
 149    fxMesaContext fxMesa = (fxMesaContext) ctx->DriverCtx;
 150    const GLuint colorMask = *((GLuint *) & ctx->Color.ColorMask);
 151    const FxU16 clearD = (FxU16) (ctx->Depth.Clear * 0xffff);
 152    GLbitfield softwareMask = mask & (DD_STENCIL_BIT | DD_ACCUM_BIT);
 153
 154    /* we can't clear stencil or accum buffers */
 155    mask &= ~(DD_STENCIL_BIT | DD_ACCUM_BIT);
 156
 157    if (MESA_VERBOSE & VERBOSE_DRIVER) {
 158       fprintf(stderr, "fxmesa: fxDDClear(%d,%d,%d,%d)\n", (int) x, (int) y,
 159               (int) width, (int) height);
 160    }
 161
 162    if (colorMask != 0xffffffff) {
 163       /* do masked color buffer clears in software */
 164       softwareMask |= (mask & (DD_FRONT_LEFT_BIT | DD_BACK_LEFT_BIT));
 165       mask &= ~(DD_FRONT_LEFT_BIT | DD_BACK_LEFT_BIT);
 166    }
 167
 168    /*
 169     * This could probably be done fancier but doing each possible case
 170     * explicitly is less error prone.
 171     */
 172    switch (mask) {
 173    case DD_BACK_LEFT_BIT | DD_DEPTH_BIT:
 174       /* back buffer & depth */
 175       FX_grDepthMask(FXTRUE);
 176       FX_grRenderBuffer(GR_BUFFER_BACKBUFFER);
 177       FX_grBufferClear(fxMesa->clearC, fxMesa->clearA, clearD);
 178       if (!ctx->Depth.Mask) {
 179          FX_grDepthMask(FXFALSE);
 180       }
 181       break;
 182    case DD_FRONT_LEFT_BIT | DD_DEPTH_BIT:
 183       /* XXX it appears that the depth buffer isn't cleared when
 184        * glRenderBuffer(GR_BUFFER_FRONTBUFFER) is set.
 185        * This is a work-around/
 186        */
 187       /* clear depth */
 188       FX_grDepthMask(FXTRUE);
 189       FX_grRenderBuffer(GR_BUFFER_BACKBUFFER);
 190       FX_grColorMask(FXFALSE, FXFALSE);
 191       FX_grBufferClear(fxMesa->clearC, fxMesa->clearA, clearD);
 192       /* clear front */
 193       FX_grColorMask(FXTRUE, ctx->Color.ColorMask[ACOMP]
 194                      && fxMesa->haveAlphaBuffer);
 195       FX_grRenderBuffer(GR_BUFFER_FRONTBUFFER);
 196       FX_grBufferClear(fxMesa->clearC, fxMesa->clearA, clearD);
 197       break;
 198    case DD_BACK_LEFT_BIT:
 199       /* back buffer only */
 200       FX_grDepthMask(FXFALSE);
 201       FX_grRenderBuffer(GR_BUFFER_BACKBUFFER);
 202       FX_grBufferClear(fxMesa->clearC, fxMesa->clearA, clearD);
 203       if (ctx->Depth.Mask) {
 204          FX_grDepthMask(FXTRUE);
 205       }
 206       break;
 207    case DD_FRONT_LEFT_BIT:
 208       /* front buffer only */
 209       FX_grDepthMask(FXFALSE);
 210       FX_grRenderBuffer(GR_BUFFER_FRONTBUFFER);
 211       FX_grBufferClear(fxMesa->clearC, fxMesa->clearA, clearD);
 212       if (ctx->Depth.Mask) {
 213          FX_grDepthMask(FXTRUE);
 214       }
 215       break;
 216    case DD_FRONT_LEFT_BIT | DD_BACK_LEFT_BIT:
 217       /* front and back */
 218       FX_grDepthMask(FXFALSE);
 219       FX_grRenderBuffer(GR_BUFFER_BACKBUFFER);
 220       FX_grBufferClear(fxMesa->clearC, fxMesa->clearA, clearD);
 221       FX_grRenderBuffer(GR_BUFFER_FRONTBUFFER);
 222       FX_grBufferClear(fxMesa->clearC, fxMesa->clearA, clearD);
 223       if (ctx->Depth.Mask) {
 224          FX_grDepthMask(FXTRUE);
 225       }
 226       break;
 227    case DD_FRONT_LEFT_BIT | DD_BACK_LEFT_BIT | DD_DEPTH_BIT:
 228       /* clear front */
 229       FX_grDepthMask(FXFALSE);
 230       FX_grRenderBuffer(GR_BUFFER_FRONTBUFFER);
 231       FX_grBufferClear(fxMesa->clearC, fxMesa->clearA, clearD);
 232       /* clear back and depth */
 233       FX_grDepthMask(FXTRUE);
 234       FX_grRenderBuffer(GR_BUFFER_BACKBUFFER);
 235       FX_grBufferClear(fxMesa->clearC, fxMesa->clearA, clearD);
 236       if (!ctx->Depth.Mask) {
 237          FX_grDepthMask(FXFALSE);
 238       }
 239       break;
 240    case DD_DEPTH_BIT:
 241       /* just the depth buffer */
 242       FX_grRenderBuffer(GR_BUFFER_BACKBUFFER);
 243       FX_grColorMask(FXFALSE, FXFALSE);
 244       FX_grDepthMask(FXTRUE);
 245       FX_grBufferClear(fxMesa->clearC, fxMesa->clearA, clearD);
 246       FX_grColorMask(FXTRUE, ctx->Color.ColorMask[ACOMP]
 247                      && fxMesa->haveAlphaBuffer);
 248       if (ctx->Color.DrawDestMask & FRONT_LEFT_BIT)
 249          FX_grRenderBuffer(GR_BUFFER_FRONTBUFFER);
 250       if (!ctx->Depth.Test || !ctx->Depth.Mask)
 251          FX_grDepthMask(FXFALSE);
 252       break;
 253    default:
 254       /* error */
 255       ;
 256    }
 257
 258    /* Clear any remaining buffers:
 259     */
 260    if (softwareMask)
 261       _swrast_Clear(ctx, softwareMask, all, x, y, width, height);
 262 }
 263
 264
 265 /* Set the buffer used for drawing */
 266 /* XXX support for separate read/draw buffers hasn't been tested */
 267 static GLboolean
 268 fxDDSetDrawBuffer(GLcontext * ctx, GLenum mode)
 269 {
 270    fxMesaContext fxMesa = (fxMesaContext) ctx->DriverCtx;
 271
 272    if (MESA_VERBOSE & VERBOSE_DRIVER) {
 273       fprintf(stderr, "fxmesa: fxDDSetBuffer(%x)\n", (int) mode);
 274    }
 275
 276    if (mode == GL_FRONT_LEFT) {
 277       fxMesa->currentFB = GR_BUFFER_FRONTBUFFER;
 278       FX_grRenderBuffer(fxMesa->currentFB);
 279       return GL_TRUE;
 280    }
 281    else if (mode == GL_BACK_LEFT) {
 282       fxMesa->currentFB = GR_BUFFER_BACKBUFFER;
 283       FX_grRenderBuffer(fxMesa->currentFB);
 284       return GL_TRUE;
 285    }
 286    else if (mode == GL_NONE) {
 287       FX_grColorMask(FXFALSE, FXFALSE);
 288       return GL_TRUE;
 289    }
 290    else {
 291       return GL_FALSE;
 292    }
 293 }
 294
 295
 296
 297
 298
 299 static void
 300 fxDDDrawBitmap(GLcontext * ctx, GLint px, GLint py,
 301                GLsizei width, GLsizei height,
 302                const struct gl_pixelstore_attrib *unpack,
 303                const GLubyte * bitmap)
 304 {
 305    fxMesaContext fxMesa = (fxMesaContext) ctx->DriverCtx;
 306    GrLfbInfo_t info;
 307    FxU16 color;
 308    const struct gl_pixelstore_attrib *finalUnpack;
 309    struct gl_pixelstore_attrib scissoredUnpack;
 310
 311    /* check if there's any raster operations enabled which we can't handle */
 312    if (ctx->Color.AlphaEnabled ||
 313        ctx->Color.BlendEnabled ||
 314        ctx->Depth.Test ||
 315        ctx->Fog.Enabled ||
 316        ctx->Color.ColorLogicOpEnabled ||
 317        ctx->Stencil.Enabled ||
 318        ctx->Scissor.Enabled ||
 319        (ctx->DrawBuffer->UseSoftwareAlphaBuffers &&
 320         ctx->Color.ColorMask[ACOMP]) || ctx->Color.MultiDrawBuffer) {
 321       _swrast_Bitmap(ctx, px, py, width, height, unpack, bitmap);
 322       return;
 323    }
 324
 325
 326    if (ctx->Scissor.Enabled) {
 327       /* This is a bit tricky, but by carefully adjusting the px, py,
 328        * width, height, skipPixels and skipRows values we can do
 329        * scissoring without special code in the rendering loop.
 330        *
 331        * KW: This code is never reached, see the test above.
 332        */
 333
 334       /* we'll construct a new pixelstore struct */
 335       finalUnpack = &scissoredUnpack;
 336       scissoredUnpack = *unpack;
 337       if (scissoredUnpack.RowLength == 0)
 338          scissoredUnpack.RowLength = width;
 339
 340       /* clip left */
 341       if (px < ctx->Scissor.X) {
 342          scissoredUnpack.SkipPixels += (ctx->Scissor.X - px);
 343          width -= (ctx->Scissor.X - px);
 344          px = ctx->Scissor.X;
 345       }
 346       /* clip right */
 347       if (px + width >= ctx->Scissor.X + ctx->Scissor.Width) {
 348          width -= (px + width - (ctx->Scissor.X + ctx->Scissor.Width));
 349       }
 350       /* clip bottom */
 351       if (py < ctx->Scissor.Y) {
 352          scissoredUnpack.SkipRows += (ctx->Scissor.Y - py);
 353          height -= (ctx->Scissor.Y - py);
 354          py = ctx->Scissor.Y;
 355       }
 356       /* clip top */
 357       if (py + height >= ctx->Scissor.Y + ctx->Scissor.Height) {
 358          height -= (py + height - (ctx->Scissor.Y + ctx->Scissor.Height));
 359       }
 360
 361       if (width <= 0 || height <= 0)
 362          return;
 363    }
 364    else {
 365       finalUnpack = unpack;
 366    }
 367
 368    /* compute pixel value */
 369    {
 370       GLint r = (GLint) (ctx->Current.RasterColor[0] * 255.0f);
 371       GLint g = (GLint) (ctx->Current.RasterColor[1] * 255.0f);
 372       GLint b = (GLint) (ctx->Current.RasterColor[2] * 255.0f);
 373       /*GLint a = (GLint)(ctx->Current.RasterColor[3]*255.0f); */
 374       if (fxMesa->bgrOrder)
 375          color = (FxU16)
 376             (((FxU16) 0xf8 & b) << (11 - 3)) |
 377             (((FxU16) 0xfc & g) << (5 - 3 + 1)) | (((FxU16) 0xf8 & r) >> 3);
 378       else
 379          color = (FxU16)
 380             (((FxU16) 0xf8 & r) << (11 - 3)) |
 381             (((FxU16) 0xfc & g) << (5 - 3 + 1)) | (((FxU16) 0xf8 & b) >> 3);
 382    }
 383
 384    info.size = sizeof(info);
 385    if (!FX_grLfbLock(GR_LFB_WRITE_ONLY,
 386                      fxMesa->currentFB,
 387                      GR_LFBWRITEMODE_565,
 388                      GR_ORIGIN_UPPER_LEFT, FXFALSE, &info)) {
 389 #ifndef FX_SILENT
 390       fprintf(stderr, "fx Driver: error locking the linear frame buffer\n");
 391 #endif
 392       return;
 393    }
 394
 395    {
 396       const GLint winX = 0;
 397       const GLint winY = fxMesa->height - 1;
 398       /* The dest stride depends on the hardware and whether we're drawing
 399        * to the front or back buffer.  This compile-time test seems to do
 400        * the job for now.
 401        */
 402       const GLint dstStride = info.strideInBytes / 2;   /* stride in GLushorts */
 403
 404       GLint row;
 405       /* compute dest address of bottom-left pixel in bitmap */
 406       GLushort *dst = (GLushort *) info.lfbPtr
 407          + (winY - py) * dstStride + (winX + px);
 408
 409       for (row = 0; row < height; row++) {
 410          const GLubyte *src =
 411             (const GLubyte *) _mesa_image_address(finalUnpack,
 412                                                   bitmap, width, height,
 413                                                   GL_COLOR_INDEX, GL_BITMAP,
 414                                                   0, row, 0);
 415          if (finalUnpack->LsbFirst) {
 416             /* least significan bit first */
 417             GLubyte mask = 1U << (finalUnpack->SkipPixels & 0x7);
 418             GLint col;
 419             for (col = 0; col < width; col++) {
 420                if (*src & mask) {
 421                   dst[col] = color;
 422                }
 423                if (mask == 128U) {
 424                   src++;
 425                   mask = 1U;
 426                }
 427                else {
 428                   mask = mask << 1;
 429                }
 430             }
 431             if (mask != 1)
 432                src++;
 433          }
 434          else {
 435             /* most significan bit first */
 436             GLubyte mask = 128U >> (finalUnpack->SkipPixels & 0x7);
 437             GLint col;
 438             for (col = 0; col < width; col++) {
 439                if (*src & mask) {
 440                   dst[col] = color;
 441                }
 442                if (mask == 1U) {
 443                   src++;
 444                   mask = 128U;
 445                }
 446                else {
 447                   mask = mask >> 1;
 448                }
 449             }
 450             if (mask != 128)
 451                src++;
 452          }
 453          dst -= dstStride;
 454       }
 455    }
 456
 457    FX_grLfbUnlock(GR_LFB_WRITE_ONLY, fxMesa->currentFB);
 458 }
 459
 460
 461 static void
 462 fxDDReadPixels(GLcontext * ctx, GLint x, GLint y,
 463                GLsizei width, GLsizei height,
 464                GLenum format, GLenum type,
 465                const struct gl_pixelstore_attrib *packing, GLvoid * dstImage)
 466 {
 467    if (ctx->_ImageTransferState) {
 468       _swrast_ReadPixels(ctx, x, y, width, height, format, type,
 469                          packing, dstImage);
 470       return;
 471    }
 472    else {
 473       fxMesaContext fxMesa = (fxMesaContext) ctx->DriverCtx;
 474       GrLfbInfo_t info;
 475
 476       BEGIN_BOARD_LOCK();
 477       if (grLfbLock(GR_LFB_READ_ONLY,
 478                     fxMesa->currentFB,
 479                     GR_LFBWRITEMODE_ANY,
 480                     GR_ORIGIN_UPPER_LEFT, FXFALSE, &info)) {
 481          const GLint winX = 0;
 482          const GLint winY = fxMesa->height - 1;
 483          const GLint srcStride = info.strideInBytes / 2;        /* stride in GLushorts */
 484          const GLushort *src = (const GLushort *) info.lfbPtr
 485             + (winY - y) * srcStride + (winX + x);
 486          GLubyte *dst = (GLubyte *) _mesa_image_address(packing, dstImage,
 487                                                         width, height, format,
 488                                                         type, 0, 0, 0);
 489          GLint dstStride =
 490             _mesa_image_row_stride(packing, width, format, type);
 491
 492          if (format == GL_RGB && type == GL_UNSIGNED_BYTE) {
 493             /* convert 5R6G5B into 8R8G8B */
 494             GLint row, col;
 495             const GLint halfWidth = width >> 1;
 496             const GLint extraPixel = (width & 1);
 497             for (row = 0; row < height; row++) {
 498                GLubyte *d = dst;
 499                for (col = 0; col < halfWidth; col++) {
 500                   const GLuint pixel = ((const GLuint *) src)[col];
 501                   const GLint pixel0 = pixel & 0xffff;
 502                   const GLint pixel1 = pixel >> 16;
 503                   *d++ = FX_PixelToR[pixel0];
 504                   *d++ = FX_PixelToG[pixel0];
 505                   *d++ = FX_PixelToB[pixel0];
 506                   *d++ = FX_PixelToR[pixel1];
 507                   *d++ = FX_PixelToG[pixel1];
 508                   *d++ = FX_PixelToB[pixel1];
 509                }
 510                if (extraPixel) {
 511                   GLushort pixel = src[width - 1];
 512                   *d++ = FX_PixelToR[pixel];
 513                   *d++ = FX_PixelToG[pixel];
 514                   *d++ = FX_PixelToB[pixel];
 515                }
 516                dst += dstStride;
 517                src -= srcStride;
 518             }
 519          }
 520          else if (format == GL_RGBA && type == GL_UNSIGNED_BYTE) {
 521             /* convert 5R6G5B into 8R8G8B8A */
 522             GLint row, col;
 523             const GLint halfWidth = width >> 1;
 524             const GLint extraPixel = (width & 1);
 525             for (row = 0; row < height; row++) {
 526                GLubyte *d = dst;
 527                for (col = 0; col < halfWidth; col++) {
 528                   const GLuint pixel = ((const GLuint *) src)[col];
 529                   const GLint pixel0 = pixel & 0xffff;
 530                   const GLint pixel1 = pixel >> 16;
 531                   *d++ = FX_PixelToR[pixel0];
 532                   *d++ = FX_PixelToG[pixel0];
 533                   *d++ = FX_PixelToB[pixel0];
 534                   *d++ = 255;
 535                   *d++ = FX_PixelToR[pixel1];
 536                   *d++ = FX_PixelToG[pixel1];
 537                   *d++ = FX_PixelToB[pixel1];
 538                   *d++ = 255;
 539                }
 540                if (extraPixel) {
 541                   const GLushort pixel = src[width - 1];
 542                   *d++ = FX_PixelToR[pixel];
 543                   *d++ = FX_PixelToG[pixel];
 544                   *d++ = FX_PixelToB[pixel];
 545                   *d++ = 255;
 546                }
 547                dst += dstStride;
 548                src -= srcStride;
 549             }
 550          }
 551          else if (format == GL_RGB && type == GL_UNSIGNED_SHORT_5_6_5) {
 552             /* directly memcpy 5R6G5B pixels into client's buffer */
 553             const GLint widthInBytes = width * 2;
 554             GLint row;
 555             for (row = 0; row < height; row++) {
 556                MEMCPY(dst, src, widthInBytes);
 557                dst += dstStride;
 558                src -= srcStride;
 559             }
 560          }
 561          else {
 562             grLfbUnlock(GR_LFB_READ_ONLY, fxMesa->currentFB);
 563             END_BOARD_LOCK();
 564             _swrast_ReadPixels(ctx, x, y, width, height, format, type,
 565                                packing, dstImage);
 566             return;
 567          }
 568
 569          grLfbUnlock(GR_LFB_READ_ONLY, fxMesa->currentFB);
 570       }
 571       END_BOARD_LOCK();
 572    }
 573 }
 574
 575
 576
 577 static void
 578 fxDDFinish(GLcontext * ctx)
 579 {
 580    FX_grFlush();
 581 }
 582
 583
 584
 585
 586
 587 /* KW: Put the word Mesa in the render string because quakeworld
 588  * checks for this rather than doing a glGet(GL_MAX_TEXTURE_SIZE).
 589  * Why?
 590  */
 591 static const GLubyte *
 592 fxDDGetString(GLcontext * ctx, GLenum name)
 593 {
 594    switch (name) {
 595    case GL_RENDERER:
 596       {
 597          static char buf[80];
 598
 599          if (glbHWConfig.SSTs[glbCurrentBoard].type == GR_SSTTYPE_VOODOO) {
 600             GrVoodooConfig_t *vc =
 601                &glbHWConfig.SSTs[glbCurrentBoard].sstBoard.VoodooConfig;
 602
 603             sprintf(buf,
 604                     "Mesa Glide v0.30 Voodoo_Graphics %d "
 605                     "CARD/%d FB/%d TM/%d TMU/%s",
 606                     glbCurrentBoard,
 607                     (vc->sliDetect ? (vc->fbRam * 2) : vc->fbRam),
 608                     (vc->tmuConfig[GR_TMU0].tmuRam +
 609                      ((vc->nTexelfx > 1) ? vc->tmuConfig[GR_TMU1].
 610                       tmuRam : 0)), vc->nTexelfx,
 611                     (vc->sliDetect ? "SLI" : "NOSLI"));
 612          }
 613          else if (glbHWConfig.SSTs[glbCurrentBoard].type == GR_SSTTYPE_SST96) {
 614             GrSst96Config_t *sc =
 615                &glbHWConfig.SSTs[glbCurrentBoard].sstBoard.SST96Config;
 616
 617             sprintf(buf,
 618                     "Glide v0.30 Voodoo_Rush %d "
 619                     "CARD/%d FB/%d TM/%d TMU/NOSLI",
 620                     glbCurrentBoard,
 621                     sc->fbRam, sc->tmuConfig.tmuRam, sc->nTexelfx);
 622          }
 623          else {
 624             strcpy(buf, "Glide v0.30 UNKNOWN");
 625          }
 626          return (GLubyte *) buf;
 627       }
 628    default:
 629       return NULL;
 630    }
 631 }
 632
 633 static const struct gl_pipeline_stage *fx_pipeline[] = {
 634    &_tnl_vertex_transform_stage,        /* TODO: Add the fastpath here */
 635    &_tnl_normal_transform_stage,
 636    &_tnl_lighting_stage,
 637    &_tnl_fog_coordinate_stage,  /* TODO: Omit fog stage */
 638    &_tnl_texgen_stage,
 639    &_tnl_texture_transform_stage,
 640    &_tnl_point_attenuation_stage,
 641    &_tnl_render_stage,
 642    0,
 643 };
 644
 645
 646
 647
 648 int
 649 fxDDInitFxMesaContext(fxMesaContext fxMesa)
 650 {
 651    int i;
 652
 653    for (i = 0; i < 256; i++) {
 654       gl_ubyte_to_float_255_color_tab[i] = (float) i;
 655    }
 656
 657    FX_setupGrVertexLayout();
 658
 659    if (getenv("FX_EMULATE_SINGLE_TMU"))
 660       fxMesa->haveTwoTMUs = GL_FALSE;
 661
 662    if (getenv("FX_GLIDE_SWAPINTERVAL"))
 663       fxMesa->swapInterval = atoi(getenv("FX_GLIDE_SWAPINTERVAL"));
 664    else
 665       fxMesa->swapInterval = 1;
 666
 667    if (getenv("MESA_FX_SWAP_PENDING"))
 668       fxMesa->maxPendingSwapBuffers = atoi(getenv("MESA_FX_SWAP_PENDING"));
 669    else
 670       fxMesa->maxPendingSwapBuffers = 2;
 671
 672    if (getenv("MESA_FX_INFO"))
 673       fxMesa->verbose = GL_TRUE;
 674    else
 675       fxMesa->verbose = GL_FALSE;
 676
 677    fxMesa->color = 0xffffffff;
 678    fxMesa->clearC = 0;
 679    fxMesa->clearA = 0;
 680
 681    fxMesa->stats.swapBuffer = 0;
 682    fxMesa->stats.reqTexUpload = 0;
 683    fxMesa->stats.texUpload = 0;
 684    fxMesa->stats.memTexUpload = 0;
 685
 686    fxMesa->tmuSrc = FX_TMU_NONE;
 687    fxMesa->lastUnitsMode = FX_UM_NONE;
 688    fxTMInit(fxMesa);
 689
 690    /* FX units setup */
 691
 692    fxMesa->unitsState.alphaTestEnabled = GL_FALSE;
 693    fxMesa->unitsState.alphaTestFunc = GR_CMP_ALWAYS;
 694    fxMesa->unitsState.alphaTestRefValue = 0;
 695
 696    fxMesa->unitsState.blendEnabled = GL_FALSE;
 697    fxMesa->unitsState.blendSrcFuncRGB = GR_BLEND_ONE;
 698    fxMesa->unitsState.blendDstFuncRGB = GR_BLEND_ZERO;
 699    fxMesa->unitsState.blendSrcFuncAlpha = GR_BLEND_ONE;
 700    fxMesa->unitsState.blendDstFuncAlpha = GR_BLEND_ZERO;
 701
 702    fxMesa->unitsState.depthTestEnabled = GL_FALSE;
 703    fxMesa->unitsState.depthMask = GL_TRUE;
 704    fxMesa->unitsState.depthTestFunc = GR_CMP_LESS;
 705
 706    FX_grColorMask(FXTRUE, fxMesa->haveAlphaBuffer ? FXTRUE : FXFALSE);
 707    if (fxMesa->haveDoubleBuffer) {
 708       fxMesa->currentFB = GR_BUFFER_BACKBUFFER;
 709       FX_grRenderBuffer(GR_BUFFER_BACKBUFFER);
 710    }
 711    else {
 712       fxMesa->currentFB = GR_BUFFER_FRONTBUFFER;
 713       FX_grRenderBuffer(GR_BUFFER_FRONTBUFFER);
 714    }
 715
 716    fxMesa->state = malloc(FX_grGetInteger(FX_GLIDE_STATE_SIZE));
 717    fxMesa->fogTable = malloc(FX_grGetInteger(FX_FOG_TABLE_ENTRIES) *
 718                              sizeof(GrFog_t));
 719
 720    if (!fxMesa->state || !fxMesa->fogTable) {
 721       if (fxMesa->state)
 722          free(fxMesa->state);
 723       if (fxMesa->fogTable)
 724          free(fxMesa->fogTable);
 725       return 0;
 726    }
 727
 728    if (fxMesa->haveZBuffer)
 729       FX_grDepthBufferMode(GR_DEPTHBUFFER_ZBUFFER);
 730
 731 #ifndef FXMESA_USE_ARGB
 732    FX_grLfbWriteColorFormat(GR_COLORFORMAT_ABGR);       /* Not every Glide has this */
 733 #endif
 734
 735    fxMesa->textureAlign = FX_grGetInteger(FX_TEXTURE_ALIGN);
 736    fxMesa->glCtx->Const.MaxTextureLevels = 9;
 737    fxMesa->glCtx->Const.MaxTextureUnits = fxMesa->haveTwoTMUs ? 2 : 1;
 738    fxMesa->new_state = _NEW_ALL;
 739
 740    /* Initialize the software rasterizer and helper modules.
 741     */
 742    _swrast_CreateContext(fxMesa->glCtx);
 743    _ac_CreateContext(fxMesa->glCtx);
 744    _tnl_CreateContext(fxMesa->glCtx);
 745    _swsetup_CreateContext(fxMesa->glCtx);
 746
 747    _tnl_destroy_pipeline(fxMesa->glCtx);
 748    _tnl_install_pipeline(fxMesa->glCtx, fx_pipeline);
 749
 750    fxAllocVB(fxMesa->glCtx);
 751
 752    fxSetupDDPointers(fxMesa->glCtx);
 753    fxDDInitTriFuncs(fxMesa->glCtx);
 754
 755    /* Tell the software rasterizer to use pixel fog always.
 756     */
 757    _swrast_allow_vertex_fog(fxMesa->glCtx, GL_FALSE);
 758    _swrast_allow_pixel_fog(fxMesa->glCtx, GL_TRUE);
 759
 760    /* Tell tnl not to calculate or use vertex fog factors.  (Needed to
 761     * tell render stage not to clip fog coords).
 762     */
 763 /*     _tnl_calculate_vertex_fog( fxMesa->glCtx, GL_FALSE ); */
 764
 765    fxDDInitExtensions(fxMesa->glCtx);
 766
 767    FX_grGlideGetState((GrState *) fxMesa->state);
 768
 769    return 1;
 770 }
 771
 772 /* Undo the above.
 773  */
 774 void
 775 fxDDDestroyFxMesaContext(fxMesaContext fxMesa)
 776 {
 777    _swsetup_DestroyContext(fxMesa->glCtx);
 778    _tnl_DestroyContext(fxMesa->glCtx);
 779    _ac_DestroyContext(fxMesa->glCtx);
 780    _swrast_DestroyContext(fxMesa->glCtx);
 781
 782    if (fxMesa->state)
 783       free(fxMesa->state);
 784    if (fxMesa->fogTable)
 785       free(fxMesa->fogTable);
 786    fxTMClose(fxMesa);
 787    fxFreeVB(fxMesa->glCtx);
 788 }
 789
 790
 791
 792
 793 void
 794 fxDDInitExtensions(GLcontext * ctx)
 795 {
 796    fxMesaContext fxMesa = (fxMesaContext) ctx->DriverCtx;
 797
 798    _mesa_add_extension(ctx, GL_TRUE, "3DFX_set_global_palette", 0);
 799    _mesa_enable_extension(ctx, "GL_EXT_point_parameters");
 800    _mesa_enable_extension(ctx, "GL_EXT_paletted_texture");
 801    _mesa_enable_extension(ctx, "GL_EXT_texture_lod_bias");
 802    _mesa_enable_extension(ctx, "GL_EXT_shared_texture_palette");
 803
 804    if (fxMesa->haveTwoTMUs)
 805       _mesa_enable_extension(ctx, "GL_EXT_texture_env_add");
 806
 807    if (fxMesa->haveTwoTMUs)
 808       _mesa_enable_extension(ctx, "GL_ARB_multitexture");
 809 }
 810
 811
 812 /************************************************************************/
 813 /************************************************************************/
 814 /************************************************************************/
 815
 816 /* Check if the hardware supports the current context
 817  *
 818  * Performs similar work to fxDDChooseRenderState() - should be merged.
 819  */
 820 GLboolean
 821 fx_check_IsInHardware(GLcontext * ctx)
 822 {
 823    fxMesaContext fxMesa = (fxMesaContext) ctx->DriverCtx;
 824
 825    if (ctx->RenderMode != GL_RENDER)
 826       return GL_FALSE;
 827
 828    if (ctx->Stencil.Enabled ||
 829        ctx->Color.MultiDrawBuffer ||
 830        ((ctx->Color.BlendEnabled)
 831         && (ctx->Color.BlendEquation != GL_FUNC_ADD_EXT))
 832        || ((ctx->Color.ColorLogicOpEnabled)
 833            && (ctx->Color.LogicOp != GL_COPY))
 834        || (ctx->Light.Model.ColorControl == GL_SEPARATE_SPECULAR_COLOR)
 835        ||
 836        (!((ctx->
 837            Color.ColorMask[RCOMP] == ctx->Color.ColorMask[GCOMP])
 838           && (ctx->Color.ColorMask[GCOMP] == ctx->Color.ColorMask[BCOMP])
 839           && (ctx->Color.ColorMask[ACOMP] == ctx->Color.ColorMask[ACOMP])))
 840       ) {
 841       return GL_FALSE;
 842    }
 843    /* Unsupported texture/multitexture cases */
 844
 845    if (fxMesa->haveTwoTMUs) {
 846       if (ctx->Texture._ReallyEnabled & (TEXTURE0_3D | TEXTURE1_3D))
 847          return GL_FALSE;       /* can't do 3D textures */
 848       if (ctx->Texture._ReallyEnabled & (TEXTURE0_1D | TEXTURE1_1D))
 849          return GL_FALSE;       /* can't do 1D textures */
 850
 851       if (ctx->Texture._ReallyEnabled & TEXTURE0_2D) {
 852          if (ctx->Texture.Unit[0].EnvMode == GL_BLEND &&
 853              (ctx->Texture._ReallyEnabled & TEXTURE1_2D ||
 854               ctx->Texture.Unit[0].EnvColor[0] != 0 ||
 855               ctx->Texture.Unit[0].EnvColor[1] != 0 ||
 856               ctx->Texture.Unit[0].EnvColor[2] != 0 ||
 857               ctx->Texture.Unit[0].EnvColor[3] != 1)) {
 858             return GL_FALSE;
 859          }
 860          if (ctx->Texture.Unit[0]._Current->Image[0]->Border > 0)
 861             return GL_FALSE;
 862       }
 863
 864       if (ctx->Texture._ReallyEnabled & TEXTURE1_2D) {
 865          if (ctx->Texture.Unit[1].EnvMode == GL_BLEND)
 866             return GL_FALSE;
 867          if (ctx->Texture.Unit[1]._Current->Image[0]->Border > 0)
 868             return GL_FALSE;
 869       }
 870
 871       if (MESA_VERBOSE & (VERBOSE_DRIVER | VERBOSE_TEXTURE))
 872          fprintf(stderr, "fxMesa: fxIsInHardware, envmode is %s/%s\n",
 873                  _mesa_lookup_enum_by_nr(ctx->Texture.Unit[0].EnvMode),
 874                  _mesa_lookup_enum_by_nr(ctx->Texture.Unit[1].EnvMode));
 875
 876       /* KW: This was wrong (I think) and I changed it... which doesn't mean
 877        * it is now correct...
 878        */
 879       if ((ctx->Texture._ReallyEnabled & (TEXTURE0_1D | TEXTURE0_2D | TEXTURE0_3D)) &&
 880           (ctx->Texture._ReallyEnabled & (TEXTURE1_1D | TEXTURE1_2D | TEXTURE1_3D))) {
 881          /* Can't use multipass to blend a multitextured triangle - fall
 882           * back to software.
 883           */
 884          if (!fxMesa->haveTwoTMUs && ctx->Color.BlendEnabled) {
 885             return GL_FALSE;
 886          }
 887
 888          if ((ctx->Texture.Unit[0].EnvMode != ctx->Texture.Unit[1].EnvMode) &&
 889              (ctx->Texture.Unit[0].EnvMode != GL_MODULATE) &&
 890              (ctx->Texture.Unit[0].EnvMode != GL_REPLACE)) {    /* q2, seems ok... */
 891             if (MESA_VERBOSE & VERBOSE_DRIVER)
 892                fprintf(stderr, "fxMesa: unsupported multitex env mode\n");
 893             return GL_FALSE;
 894          }
 895       }
 896    }
 897    else {
 898       if ((ctx->Texture._ReallyEnabled & (TEXTURE1_1D | TEXTURE1_2D | TEXTURE1_3D)) ||
 899           /* Not very well written ... */
 900           ((ctx->Texture._ReallyEnabled & TEXTURE0_1D) &&
 901            (!(ctx->Texture._ReallyEnabled & TEXTURE0_2D)))
 902          ) {
 903          return GL_FALSE;
 904       }
 905
 906
 907       if ((ctx->Texture._ReallyEnabled & TEXTURE0_2D) &&
 908           (ctx->Texture.Unit[0].EnvMode == GL_BLEND)) {
 909          return GL_FALSE;
 910       }
 911    }
 912
 913    return GL_TRUE;
 914 }
 915
 916
 917
 918 static void
 919 update_texture_scales(GLcontext * ctx)
 920 {
 921    fxMesaContext fxMesa = FX_CONTEXT(ctx);
 922    struct gl_texture_unit *t0 = &ctx->Texture.Unit[fxMesa->tmu_source[0]];
 923    struct gl_texture_unit *t1 = &ctx->Texture.Unit[fxMesa->tmu_source[1]];
 924
 925    if (t0 && t0->_Current && FX_TEXTURE_DATA(t0)) {
 926       fxMesa->s0scale = FX_TEXTURE_DATA(t0)->sScale;
 927       fxMesa->t0scale = FX_TEXTURE_DATA(t0)->tScale;
 928       fxMesa->inv_s0scale = 1.0 / fxMesa->s0scale;
 929       fxMesa->inv_t0scale = 1.0 / fxMesa->t0scale;
 930    }
 931
 932    if (t1 && t1->_Current && FX_TEXTURE_DATA(t1)) {
 933       fxMesa->s1scale = FX_TEXTURE_DATA(t1)->sScale;
 934       fxMesa->t1scale = FX_TEXTURE_DATA(t1)->tScale;
 935       fxMesa->inv_s1scale = 1.0 / fxMesa->s1scale;
 936       fxMesa->inv_t1scale = 1.0 / fxMesa->t1scale;
 937    }
 938 }
 939
 940 static void
 941 fxDDUpdateDDPointers(GLcontext * ctx, GLuint new_state)
 942 {
 943    /*   TNLcontext *tnl = TNL_CONTEXT(ctx);*/
 944    fxMesaContext fxMesa = FX_CONTEXT(ctx);
 945
 946    _swrast_InvalidateState(ctx, new_state);
 947    _ac_InvalidateState(ctx, new_state);
 948    _tnl_InvalidateState(ctx, new_state);
 949    _swsetup_InvalidateState(ctx, new_state);
 950
 951    /* Recalculate fog table on projection matrix changes.  This used to
 952     * be triggered by the NearFar callback.
 953     */
 954    if (new_state & _NEW_PROJECTION)
 955       fxMesa->new_state |= FX_NEW_FOG;
 956
 957    if (new_state & (_FX_NEW_IS_IN_HARDWARE |
 958                     _FX_NEW_RENDERSTATE |
 959                     _FX_NEW_SETUP_FUNCTION |
 960                     _NEW_TEXTURE)) {
 961
 962       if (new_state & _FX_NEW_IS_IN_HARDWARE)
 963          fxCheckIsInHardware(ctx);
 964
 965       if (fxMesa->new_state)
 966          fxSetupFXUnits(ctx);
 967
 968       if (fxMesa->is_in_hardware) {
 969          if (new_state & _FX_NEW_RENDERSTATE)
 970             fxDDChooseRenderState(ctx);
 971
 972          if (new_state & _FX_NEW_SETUP_FUNCTION)
 973             fxChooseVertexState(ctx);
 974       }
 975
 976       if (new_state & _NEW_TEXTURE)
 977          update_texture_scales(ctx);
 978    }
 979 }
 980
 981
 982
 983
 984 void
 985 fxSetupDDPointers(GLcontext * ctx)
 986 {
 987    TNLcontext *tnl = TNL_CONTEXT(ctx);
 988
 989    if (MESA_VERBOSE & VERBOSE_DRIVER) {
 990       fprintf(stderr, "fxmesa: fxSetupDDPointers()\n");
 991    }
 992
 993    ctx->Driver.UpdateState = fxDDUpdateDDPointers;
 994    ctx->Driver.GetString = fxDDGetString;
 995    ctx->Driver.ClearIndex = NULL;
 996    ctx->Driver.ClearColor = fxDDClearColor;
 997    ctx->Driver.Clear = fxDDClear;
 998    ctx->Driver.SetDrawBuffer = fxDDSetDrawBuffer;
 999    ctx->Driver.GetBufferSize = fxDDBufferSize;
1000    ctx->Driver.Accum = _swrast_Accum;
1001    ctx->Driver.Bitmap = fxDDDrawBitmap;
1002    ctx->Driver.CopyPixels = _swrast_CopyPixels;
1003    ctx->Driver.DrawPixels = _swrast_DrawPixels;
1004    ctx->Driver.ReadPixels = fxDDReadPixels;
1005    ctx->Driver.ResizeBuffers = _swrast_alloc_buffers;
1006    ctx->Driver.Finish = fxDDFinish;
1007    ctx->Driver.Flush = NULL;
1008    ctx->Driver.ChooseTextureFormat = fxDDChooseTextureFormat;
1009    ctx->Driver.TexImage1D = _mesa_store_teximage1d;
1010    ctx->Driver.TexImage2D = fxDDTexImage2D;
1011    ctx->Driver.TexImage3D = _mesa_store_teximage3d;
1012    ctx->Driver.TexSubImage1D = _mesa_store_texsubimage1d;
1013    ctx->Driver.TexSubImage2D = fxDDTexSubImage2D;
1014    ctx->Driver.TexSubImage3D = _mesa_store_texsubimage3d;
1015    ctx->Driver.CopyTexImage1D = _swrast_copy_teximage1d;
1016    ctx->Driver.CopyTexImage2D = _swrast_copy_teximage2d;
1017    ctx->Driver.CopyTexSubImage1D = _swrast_copy_texsubimage1d;
1018    ctx->Driver.CopyTexSubImage2D = _swrast_copy_texsubimage2d;
1019    ctx->Driver.CopyTexSubImage3D = _swrast_copy_texsubimage3d;
1020    ctx->Driver.TestProxyTexImage = _mesa_test_proxy_teximage;
1021    ctx->Driver.CopyColorTable = _swrast_CopyColorTable;
1022    ctx->Driver.CopyColorSubTable = _swrast_CopyColorSubTable;
1023    ctx->Driver.CopyConvolutionFilter1D = _swrast_CopyConvolutionFilter1D;
1024    ctx->Driver.CopyConvolutionFilter2D = _swrast_CopyConvolutionFilter2D;
1025    ctx->Driver.TexEnv = fxDDTexEnv;
1026    ctx->Driver.TexParameter = fxDDTexParam;
1027    ctx->Driver.BindTexture = fxDDTexBind;
1028    ctx->Driver.DeleteTexture = fxDDTexDel;
1029    ctx->Driver.UpdateTexturePalette = fxDDTexPalette;
1030    ctx->Driver.AlphaFunc = fxDDAlphaFunc;
1031    ctx->Driver.BlendFunc = fxDDBlendFunc;
1032    ctx->Driver.DepthFunc = fxDDDepthFunc;
1033    ctx->Driver.DepthMask = fxDDDepthMask;
1034    ctx->Driver.ColorMask = fxDDColorMask;
1035    ctx->Driver.Fogfv = fxDDFogfv;
1036    ctx->Driver.Scissor = fxDDScissor;
1037    ctx->Driver.FrontFace = fxDDFrontFace;
1038    ctx->Driver.CullFace = fxDDCullFace;
1039    ctx->Driver.ShadeModel = fxDDShadeModel;
1040    ctx->Driver.Enable = fxDDEnable;
1041
1042    tnl->Driver.RunPipeline = _tnl_run_pipeline;
1043
1044    fxSetupDDSpanPointers(ctx);
1045    fxDDUpdateDDPointers(ctx, ~0);
1046 }
1047
1048
1049 #else
1050
1051
1052 /*
1053  * Need this to provide at least one external definition.
1054  */
1055
1056 extern int gl_fx_dummy_function_dd(void);
1057 int
1058 gl_fx_dummy_function_dd(void)
1059 {
1060    return 0;
1061 }
1062
1063 #endif /* FX */