src/mesa/drivers/glide/fxdd.c

   1
   2 /*
   3  * Mesa 3-D graphics library
   4  * Version:  3.3
   5  *
   6  * Copyright (C) 1999-2000  Brian Paul   All Rights Reserved.
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a
   9  * copy of this software and associated documentation files (the "Software"),
  10  * to deal in the Software without restriction, including without limitation
  11  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  12  * and/or sell copies of the Software, and to permit persons to whom the
  13  * Software is furnished to do so, subject to the following conditions:
  14  *
  15  * The above copyright notice and this permission notice shall be included
  16  * in all copies or substantial portions of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  21  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  22  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  23  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  24  *
  25  *
  26  * Original Mesa / 3Dfx device driver (C) 1999 David Bucciarelli, by the
  27  * terms stated above.
  28  *
  29  * Thank you for your contribution, David!
  30  *
  31  * Please make note of the above copyright/license statement.  If you
  32  * contributed code or bug fixes to this code under the previous (GNU
  33  * Library) license and object to the new license, your code will be
  34  * removed at your request.  Please see the Mesa docs/COPYRIGHT file
  35  * for more information.
  36  *
  37  * Additional Mesa/3Dfx driver developers:
  38  *   Daryll Strauss <daryll@precisioninsight.com>
  39  *   Keith Whitwell <keith@precisioninsight.com>
  40  *
  41  * See fxapi.h for more revision/author details.
  42  */
  43
  44
  45 /* fxdd.c - 3Dfx VooDoo Mesa device driver functions */
  46
  47
  48 #ifdef HAVE_CONFIG_H
  49 #include "conf.h"
  50 #endif
  51
  52 #if defined(FX)
  53
  54 #include "image.h"
  55 #include "mtypes.h"
  56 #include "fxdrv.h"
  57 #include "enums.h"
  58 #include "extensions.h"
  59 #include "swrast/swrast.h"
  60 #include "swrast_setup/swrast_setup.h"
  61 #include "tnl/tnl.h"
  62 #include "array_cache/acache.h"
  63
  64 #include "tnl/t_pipeline.h"
  65
  66
  67 float gl_ubyte_to_float_255_color_tab[256];
  68
  69 /* These lookup table are used to extract RGB values in [0,255] from
  70  * 16-bit pixel values.
  71  */
  72 GLubyte FX_PixelToR[0x10000];
  73 GLubyte FX_PixelToG[0x10000];
  74 GLubyte FX_PixelToB[0x10000];
  75
  76
  77 /*
  78  * Initialize the FX_PixelTo{RGB} arrays.
  79  * Input: bgrOrder - if TRUE, pixels are in BGR order, else RGB order.
  80  */
  81 void fxInitPixelTables(fxMesaContext fxMesa, GLboolean bgrOrder)
  82 {
  83   GLuint pixel;
  84
  85   fxMesa->bgrOrder=bgrOrder;
  86   for (pixel = 0; pixel <= 0xffff; pixel++) {
  87     GLuint r, g, b;
  88     if (bgrOrder) {
  89       r = (pixel & 0x001F) << 3;
  90       g = (pixel & 0x07E0) >> 3;
  91       b = (pixel & 0xF800) >> 8;
  92     }
  93     else {
  94       r = (pixel & 0xF800) >> 8;
  95       g = (pixel & 0x07E0) >> 3;
  96       b = (pixel & 0x001F) << 3;
  97     }
  98     r = r * 255 / 0xF8;  /* fill in low-order bits */
  99     g = g * 255 / 0xFC;
 100     b = b * 255 / 0xF8;
 101     FX_PixelToR[pixel] = r;
 102     FX_PixelToG[pixel] = g;
 103     FX_PixelToB[pixel] = b;
 104   }
 105 }
 106
 107
 108 /**********************************************************************/
 109 /*****                 Miscellaneous functions                    *****/
 110 /**********************************************************************/
 111
 112 /* Return buffer size information */
 113 static void fxDDBufferSize(GLcontext *ctx, GLuint *width, GLuint *height)
 114 {
 115   fxMesaContext fxMesa=(fxMesaContext)ctx->DriverCtx;
 116
 117   if (MESA_VERBOSE&VERBOSE_DRIVER) {
 118     fprintf(stderr,"fxmesa: fxDDBufferSize(...) Start\n");
 119   }
 120
 121   *width=fxMesa->width;
 122   *height=fxMesa->height;
 123
 124   if (MESA_VERBOSE&VERBOSE_DRIVER) {
 125     fprintf(stderr,"fxmesa: fxDDBufferSize(...) End\n");
 126   }
 127 }
 128
 129
 130 /* Implements glClearColor() */
 131 static void fxDDClearColor(GLcontext *ctx, const GLchan color[4])
 132 {
 133   fxMesaContext fxMesa=(fxMesaContext)ctx->DriverCtx;
 134   GLubyte col[4];
 135
 136   if (MESA_VERBOSE&VERBOSE_DRIVER) {
 137     fprintf(stderr,"fxmesa: fxDDClearColor(%d,%d,%d,%d)\n",
 138             color[0], color[1], color[2], color[3]);
 139   }
 140
 141   ASSIGN_4V( col, color[0], color[1], color[2], 255 );
 142   fxMesa->clearC = FXCOLOR4( col );
 143   fxMesa->clearA = color[3];
 144 }
 145
 146
 147 /* Clear the color and/or depth buffers */
 148 static void fxDDClear(GLcontext *ctx, GLbitfield mask, GLboolean all,
 149                       GLint x, GLint y, GLint width, GLint height )
 150 {
 151   fxMesaContext fxMesa=(fxMesaContext)ctx->DriverCtx;
 152   const GLuint colorMask = *((GLuint *) &ctx->Color.ColorMask);
 153   const FxU16 clearD = (FxU16) (ctx->Depth.Clear * 0xffff);
 154   GLbitfield softwareMask = mask & (DD_STENCIL_BIT | DD_ACCUM_BIT);
 155
 156   /* we can't clear stencil or accum buffers */
 157   mask &= ~(DD_STENCIL_BIT | DD_ACCUM_BIT);
 158
 159   if (MESA_VERBOSE & VERBOSE_DRIVER) {
 160     fprintf(stderr,"fxmesa: fxDDClear(%d,%d,%d,%d)\n", (int) x, (int) y,
 161             (int) width, (int) height);
 162   }
 163
 164   if (colorMask != 0xffffffff) {
 165     /* do masked color buffer clears in software */
 166     softwareMask |= (mask & (DD_FRONT_LEFT_BIT | DD_BACK_LEFT_BIT));
 167     mask &= ~(DD_FRONT_LEFT_BIT | DD_BACK_LEFT_BIT);
 168   }
 169
 170   /*
 171    * This could probably be done fancier but doing each possible case
 172    * explicitly is less error prone.
 173    */
 174   switch (mask) {
 175     case DD_BACK_LEFT_BIT | DD_DEPTH_BIT:
 176       /* back buffer & depth */
 177       FX_grDepthMask(FXTRUE);
 178       FX_grRenderBuffer(GR_BUFFER_BACKBUFFER);
 179       FX_grBufferClear(fxMesa->clearC, fxMesa->clearA, clearD);
 180       if (!ctx->Depth.Mask) {
 181         FX_grDepthMask(FXFALSE);
 182       }
 183       break;
 184     case DD_FRONT_LEFT_BIT | DD_DEPTH_BIT:
 185       /* XXX it appears that the depth buffer isn't cleared when
 186        * glRenderBuffer(GR_BUFFER_FRONTBUFFER) is set.
 187        * This is a work-around/
 188        */
 189       /* clear depth */
 190       FX_grDepthMask(FXTRUE);
 191       FX_grRenderBuffer(GR_BUFFER_BACKBUFFER);
 192       FX_grColorMask(FXFALSE,FXFALSE);
 193       FX_grBufferClear(fxMesa->clearC, fxMesa->clearA, clearD);
 194       /* clear front */
 195       FX_grColorMask(FXTRUE, ctx->Color.ColorMask[ACOMP] && fxMesa->haveAlphaBuffer);
 196       FX_grRenderBuffer(GR_BUFFER_FRONTBUFFER);
 197       FX_grBufferClear(fxMesa->clearC, fxMesa->clearA, clearD);
 198       break;
 199     case DD_BACK_LEFT_BIT:
 200       /* back buffer only */
 201       FX_grDepthMask(FXFALSE);
 202       FX_grRenderBuffer(GR_BUFFER_BACKBUFFER);
 203       FX_grBufferClear(fxMesa->clearC, fxMesa->clearA, clearD);
 204       if (ctx->Depth.Mask) {
 205         FX_grDepthMask(FXTRUE);
 206       }
 207       break;
 208     case DD_FRONT_LEFT_BIT:
 209       /* front buffer only */
 210       FX_grDepthMask(FXFALSE);
 211       FX_grRenderBuffer(GR_BUFFER_FRONTBUFFER);
 212       FX_grBufferClear(fxMesa->clearC, fxMesa->clearA, clearD);
 213       if (ctx->Depth.Mask) {
 214         FX_grDepthMask(FXTRUE);
 215       }
 216       break;
 217     case DD_FRONT_LEFT_BIT | DD_BACK_LEFT_BIT:
 218       /* front and back */
 219       FX_grDepthMask(FXFALSE);
 220       FX_grRenderBuffer(GR_BUFFER_BACKBUFFER);
 221       FX_grBufferClear(fxMesa->clearC, fxMesa->clearA, clearD);
 222       FX_grRenderBuffer(GR_BUFFER_FRONTBUFFER);
 223       FX_grBufferClear(fxMesa->clearC, fxMesa->clearA, clearD);
 224       if (ctx->Depth.Mask) {
 225         FX_grDepthMask(FXTRUE);
 226       }
 227       break;
 228     case DD_FRONT_LEFT_BIT | DD_BACK_LEFT_BIT | DD_DEPTH_BIT:
 229       /* clear front */
 230       FX_grDepthMask(FXFALSE);
 231       FX_grRenderBuffer(GR_BUFFER_FRONTBUFFER);
 232       FX_grBufferClear(fxMesa->clearC, fxMesa->clearA, clearD);
 233       /* clear back and depth */
 234       FX_grDepthMask(FXTRUE);
 235       FX_grRenderBuffer(GR_BUFFER_BACKBUFFER);
 236       FX_grBufferClear(fxMesa->clearC, fxMesa->clearA, clearD);
 237       if (!ctx->Depth.Mask) {
 238         FX_grDepthMask(FXFALSE);
 239       }
 240       break;
 241     case DD_DEPTH_BIT:
 242       /* just the depth buffer */
 243       FX_grRenderBuffer(GR_BUFFER_BACKBUFFER);
 244       FX_grColorMask(FXFALSE,FXFALSE);
 245       FX_grDepthMask(FXTRUE);
 246       FX_grBufferClear(fxMesa->clearC, fxMesa->clearA, clearD);
 247       FX_grColorMask(FXTRUE, ctx->Color.ColorMask[ACOMP] && 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 fxDDSetDrawBuffer(GLcontext *ctx, GLenum mode)
 268 {
 269   fxMesaContext fxMesa=(fxMesaContext)ctx->DriverCtx;
 270
 271   if (MESA_VERBOSE&VERBOSE_DRIVER) {
 272     fprintf(stderr,"fxmesa: fxDDSetBuffer(%x)\n", (int) mode);
 273   }
 274
 275   if (mode == GL_FRONT_LEFT) {
 276     fxMesa->currentFB = GR_BUFFER_FRONTBUFFER;
 277     FX_grRenderBuffer(fxMesa->currentFB);
 278     return GL_TRUE;
 279   }
 280   else if (mode == GL_BACK_LEFT) {
 281     fxMesa->currentFB = GR_BUFFER_BACKBUFFER;
 282     FX_grRenderBuffer(fxMesa->currentFB);
 283     return GL_TRUE;
 284   }
 285   else if (mode == GL_NONE) {
 286     FX_grColorMask(FXFALSE,FXFALSE);
 287     return GL_TRUE;
 288   }
 289   else {
 290     return GL_FALSE;
 291   }
 292 }
 293
 294
 295 /* Set the buffer used for reading */
 296 /* XXX support for separate read/draw buffers hasn't been tested */
 297 static void fxDDSetReadBuffer(GLcontext *ctx, GLframebuffer *buffer,
 298                               GLenum mode )
 299 {
 300   fxMesaContext fxMesa=(fxMesaContext)ctx->DriverCtx;
 301   (void) buffer;
 302
 303   if (MESA_VERBOSE&VERBOSE_DRIVER) {
 304     fprintf(stderr,"fxmesa: fxDDSetBuffer(%x)\n", (int) mode);
 305   }
 306
 307   if (mode == GL_FRONT_LEFT) {
 308     fxMesa->currentFB = GR_BUFFER_FRONTBUFFER;
 309     FX_grRenderBuffer(fxMesa->currentFB);
 310   }
 311   else if (mode == GL_BACK_LEFT) {
 312     fxMesa->currentFB = GR_BUFFER_BACKBUFFER;
 313     FX_grRenderBuffer(fxMesa->currentFB);
 314   }
 315 }
 316
 317
 318
 319 static void fxDDDrawBitmap(GLcontext *ctx, GLint px, GLint py,
 320                            GLsizei width, GLsizei height,
 321                            const struct gl_pixelstore_attrib *unpack,
 322                            const GLubyte *bitmap)
 323 {
 324   fxMesaContext fxMesa=(fxMesaContext)ctx->DriverCtx;
 325   GrLfbInfo_t info;
 326   FxU16 color;
 327   const struct gl_pixelstore_attrib *finalUnpack;
 328   struct gl_pixelstore_attrib scissoredUnpack;
 329
 330   /* check if there's any raster operations enabled which we can't handle */
 331   if (ctx->Color.AlphaEnabled ||
 332       ctx->Color.BlendEnabled ||
 333       ctx->Depth.Test ||
 334       ctx->Fog.Enabled ||
 335       ctx->Color.ColorLogicOpEnabled ||
 336       ctx->Stencil.Enabled ||
 337       ctx->Scissor.Enabled ||
 338       (  ctx->DrawBuffer->UseSoftwareAlphaBuffers &&
 339          ctx->Color.ColorMask[ACOMP]) ||
 340       ctx->Color.MultiDrawBuffer)
 341   {
 342      _swrast_Bitmap( ctx, px, py, width, height, unpack, bitmap );
 343      return;
 344   }
 345
 346
 347   if (ctx->Scissor.Enabled) {
 348     /* This is a bit tricky, but by carefully adjusting the px, py,
 349      * width, height, skipPixels and skipRows values we can do
 350      * scissoring without special code in the rendering loop.
 351      *
 352      * KW: This code is never reached, see the test above.
 353      */
 354
 355     /* we'll construct a new pixelstore struct */
 356     finalUnpack = &scissoredUnpack;
 357     scissoredUnpack = *unpack;
 358     if (scissoredUnpack.RowLength == 0)
 359       scissoredUnpack.RowLength = width;
 360
 361     /* clip left */
 362     if (px < ctx->Scissor.X) {
 363       scissoredUnpack.SkipPixels += (ctx->Scissor.X - px);
 364       width -= (ctx->Scissor.X - px);
 365       px = ctx->Scissor.X;
 366     }
 367     /* clip right */
 368     if (px + width >= ctx->Scissor.X + ctx->Scissor.Width) {
 369       width -= (px + width - (ctx->Scissor.X + ctx->Scissor.Width));
 370     }
 371     /* clip bottom */
 372     if (py < ctx->Scissor.Y) {
 373       scissoredUnpack.SkipRows += (ctx->Scissor.Y - py);
 374       height -= (ctx->Scissor.Y - py);
 375       py = ctx->Scissor.Y;
 376     }
 377     /* clip top */
 378     if (py + height >= ctx->Scissor.Y + ctx->Scissor.Height) {
 379       height -= (py + height - (ctx->Scissor.Y + ctx->Scissor.Height));
 380     }
 381
 382     if (width <= 0 || height <= 0)
 383        return;
 384   }
 385   else {
 386     finalUnpack = unpack;
 387   }
 388
 389   /* compute pixel value */
 390   {
 391     GLint r = (GLint) (ctx->Current.RasterColor[0] * 255.0f);
 392     GLint g = (GLint) (ctx->Current.RasterColor[1] * 255.0f);
 393     GLint b = (GLint) (ctx->Current.RasterColor[2] * 255.0f);
 394     /*GLint a = (GLint)(ctx->Current.RasterColor[3]*255.0f);*/
 395     if (fxMesa->bgrOrder)
 396       color = (FxU16)
 397         ( ((FxU16)0xf8 & b) << (11-3))  |
 398         ( ((FxU16)0xfc & g) << (5-3+1)) |
 399         ( ((FxU16)0xf8 & r) >> 3);
 400     else
 401       color = (FxU16)
 402         ( ((FxU16)0xf8 & r) << (11-3))  |
 403         ( ((FxU16)0xfc & g) << (5-3+1)) |
 404         ( ((FxU16)0xf8 & b) >> 3);
 405   }
 406
 407   info.size = sizeof(info);
 408   if (!FX_grLfbLock(GR_LFB_WRITE_ONLY,
 409                     fxMesa->currentFB,
 410                     GR_LFBWRITEMODE_565,
 411                     GR_ORIGIN_UPPER_LEFT,
 412                     FXFALSE,
 413                     &info)) {
 414 #ifndef FX_SILENT
 415     fprintf(stderr,"fx Driver: error locking the linear frame buffer\n");
 416 #endif
 417     return;
 418   }
 419
 420   {
 421     const GLint winX = 0;
 422     const GLint winY = fxMesa->height - 1;
 423     /* The dest stride depends on the hardware and whether we're drawing
 424      * to the front or back buffer.  This compile-time test seems to do
 425      * the job for now.
 426      */
 427     const GLint dstStride = info.strideInBytes / 2; /* stride in GLushorts */
 428
 429     GLint row;
 430     /* compute dest address of bottom-left pixel in bitmap */
 431     GLushort *dst = (GLushort *) info.lfbPtr
 432                   + (winY - py) * dstStride
 433                   + (winX + px);
 434
 435     for (row = 0; row < height; row++) {
 436       const GLubyte *src = (const GLubyte *) _mesa_image_address( finalUnpack,
 437                  bitmap, width, height, GL_COLOR_INDEX, GL_BITMAP, 0, row, 0 );
 438       if (finalUnpack->LsbFirst) {
 439         /* least significan bit first */
 440         GLubyte mask = 1U << (finalUnpack->SkipPixels & 0x7);
 441         GLint col;
 442         for (col=0; col<width; col++) {
 443           if (*src & mask) {
 444             dst[col] = color;
 445           }
 446           if (mask == 128U) {
 447             src++;
 448             mask = 1U;
 449           }
 450           else {
 451             mask = mask << 1;
 452           }
 453         }
 454         if (mask != 1)
 455           src++;
 456       }
 457       else {
 458         /* most significan bit first */
 459         GLubyte mask = 128U >> (finalUnpack->SkipPixels & 0x7);
 460         GLint col;
 461         for (col=0; col<width; col++) {
 462           if (*src & mask) {
 463             dst[col] = color;
 464           }
 465           if (mask == 1U) {
 466             src++;
 467             mask = 128U;
 468           }
 469           else {
 470             mask = mask >> 1;
 471           }
 472         }
 473         if (mask != 128)
 474           src++;
 475       }
 476       dst -= dstStride;
 477     }
 478   }
 479
 480   FX_grLfbUnlock(GR_LFB_WRITE_ONLY,fxMesa->currentFB);
 481 }
 482
 483
 484 static void fxDDReadPixels( GLcontext *ctx, GLint x, GLint y,
 485                             GLsizei width, GLsizei height,
 486                             GLenum format, GLenum type,
 487                             const struct gl_pixelstore_attrib *packing,
 488                             GLvoid *dstImage )
 489 {
 490    if (ctx->_ImageTransferState) {
 491       _swrast_ReadPixels( ctx, x, y, width, height, format, type,
 492                           packing, dstImage );
 493       return;
 494    }
 495    else {
 496       fxMesaContext fxMesa=(fxMesaContext)ctx->DriverCtx;
 497       GrLfbInfo_t info;
 498
 499       BEGIN_BOARD_LOCK();
 500       if (grLfbLock(GR_LFB_READ_ONLY,
 501                     fxMesa->currentFB,
 502                     GR_LFBWRITEMODE_ANY,
 503                     GR_ORIGIN_UPPER_LEFT,
 504                     FXFALSE,
 505                     &info)) {
 506          const GLint winX = 0;
 507          const GLint winY = fxMesa->height - 1;
 508          const GLint srcStride = info.strideInBytes / 2; /* stride in GLushorts */
 509          const GLushort *src = (const GLushort *) info.lfbPtr
 510             + (winY - y) * srcStride + (winX + x);
 511          GLubyte *dst = (GLubyte *) _mesa_image_address(packing, dstImage,
 512                                                         width, height, format, type, 0, 0, 0);
 513          GLint dstStride = _mesa_image_row_stride(packing, width, format, type);
 514
 515          if (format == GL_RGB && type == GL_UNSIGNED_BYTE) {
 516             /* convert 5R6G5B into 8R8G8B */
 517             GLint row, col;
 518             const GLint halfWidth = width >> 1;
 519             const GLint extraPixel = (width & 1);
 520             for (row = 0; row < height; row++) {
 521                GLubyte *d = dst;
 522                for (col = 0; col < halfWidth; col++) {
 523                   const GLuint pixel = ((const GLuint *) src)[col];
 524                   const GLint pixel0 = pixel & 0xffff;
 525                   const GLint pixel1 = pixel >> 16;
 526                   *d++ = FX_PixelToR[pixel0];
 527                   *d++ = FX_PixelToG[pixel0];
 528                   *d++ = FX_PixelToB[pixel0];
 529                   *d++ = FX_PixelToR[pixel1];
 530                   *d++ = FX_PixelToG[pixel1];
 531                   *d++ = FX_PixelToB[pixel1];
 532                }
 533                if (extraPixel) {
 534                   GLushort pixel = src[width-1];
 535                   *d++ = FX_PixelToR[pixel];
 536                   *d++ = FX_PixelToG[pixel];
 537                   *d++ = FX_PixelToB[pixel];
 538                }
 539                dst += dstStride;
 540                src -= srcStride;
 541             }
 542          }
 543          else if (format == GL_RGBA && type == GL_UNSIGNED_BYTE) {
 544             /* convert 5R6G5B into 8R8G8B8A */
 545             GLint row, col;
 546             const GLint halfWidth = width >> 1;
 547             const GLint extraPixel = (width & 1);
 548             for (row = 0; row < height; row++) {
 549                GLubyte *d = dst;
 550                for (col = 0; col < halfWidth; col++) {
 551                   const GLuint pixel = ((const GLuint *) src)[col];
 552                   const GLint pixel0 = pixel & 0xffff;
 553                   const GLint pixel1 = pixel >> 16;
 554                   *d++ = FX_PixelToR[pixel0];
 555                   *d++ = FX_PixelToG[pixel0];
 556                   *d++ = FX_PixelToB[pixel0];
 557                   *d++ = 255;
 558                   *d++ = FX_PixelToR[pixel1];
 559                   *d++ = FX_PixelToG[pixel1];
 560                   *d++ = FX_PixelToB[pixel1];
 561                   *d++ = 255;
 562                }
 563                if (extraPixel) {
 564                   const GLushort pixel = src[width-1];
 565                   *d++ = FX_PixelToR[pixel];
 566                   *d++ = FX_PixelToG[pixel];
 567                   *d++ = FX_PixelToB[pixel];
 568                   *d++ = 255;
 569                }
 570                dst += dstStride;
 571                src -= srcStride;
 572             }
 573          }
 574          else if (format == GL_RGB && type == GL_UNSIGNED_SHORT_5_6_5) {
 575             /* directly memcpy 5R6G5B pixels into client's buffer */
 576             const GLint widthInBytes = width * 2;
 577             GLint row;
 578             for (row = 0; row < height; row++) {
 579                MEMCPY(dst, src, widthInBytes);
 580                dst += dstStride;
 581                src -= srcStride;
 582             }
 583          }
 584          else {
 585             grLfbUnlock(GR_LFB_READ_ONLY, fxMesa->currentFB);
 586             END_BOARD_LOCK();
 587             _swrast_ReadPixels( ctx, x, y, width, height, format, type,
 588                                 packing, dstImage );
 589             return;
 590          }
 591
 592          grLfbUnlock(GR_LFB_READ_ONLY, fxMesa->currentFB);
 593       }
 594       END_BOARD_LOCK();
 595    }
 596 }
 597
 598
 599
 600 static void fxDDFinish(GLcontext *ctx)
 601 {
 602   FX_grFlush();
 603 }
 604
 605
 606
 607
 608
 609 /* KW: Put the word Mesa in the render string because quakeworld
 610  * checks for this rather than doing a glGet(GL_MAX_TEXTURE_SIZE).
 611  * Why?
 612  */
 613 static const GLubyte *fxDDGetString(GLcontext *ctx, GLenum name)
 614 {
 615   switch (name) {
 616     case GL_RENDERER:
 617       {
 618         static char buf[80];
 619
 620         if (glbHWConfig.SSTs[glbCurrentBoard].type==GR_SSTTYPE_VOODOO) {
 621           GrVoodooConfig_t *vc =
 622             &glbHWConfig.SSTs[glbCurrentBoard].sstBoard.VoodooConfig;
 623
 624           sprintf(buf,
 625                   "Mesa Glide v0.30 Voodoo_Graphics %d "
 626                   "CARD/%d FB/%d TM/%d TMU/%s",
 627                   glbCurrentBoard,
 628                   (vc->sliDetect ? (vc->fbRam*2) : vc->fbRam),
 629                   (vc->tmuConfig[GR_TMU0].tmuRam +
 630                    ((vc->nTexelfx>1) ? vc->tmuConfig[GR_TMU1].tmuRam : 0)),
 631                   vc->nTexelfx,
 632                   (vc->sliDetect ? "SLI" : "NOSLI"));
 633         }
 634         else if (glbHWConfig.SSTs[glbCurrentBoard].type==GR_SSTTYPE_SST96) {
 635           GrSst96Config_t *sc =
 636             &glbHWConfig.SSTs[glbCurrentBoard].sstBoard.SST96Config;
 637
 638           sprintf(buf,
 639                   "Glide v0.30 Voodoo_Rush %d "
 640                   "CARD/%d FB/%d TM/%d TMU/NOSLI",
 641                   glbCurrentBoard,
 642                   sc->fbRam,
 643                   sc->tmuConfig.tmuRam,
 644                   sc->nTexelfx);
 645         }
 646         else {
 647           strcpy(buf, "Glide v0.30 UNKNOWN");
 648         }
 649         return (GLubyte *) buf;
 650       }
 651     default:
 652       return NULL;
 653   }
 654 }
 655
 656 static const struct gl_pipeline_stage *fx_pipeline[] = {
 657    &_tnl_update_material_stage, /* TODO: Add the fastpath here */
 658    &_tnl_vertex_transform_stage,
 659    &_tnl_normal_transform_stage,
 660    &_tnl_lighting_stage,
 661    &_tnl_fog_coordinate_stage,  /* TODO: Omit fog stage */
 662    &_tnl_texgen_stage,
 663    &_tnl_texture_transform_stage,
 664    &_tnl_point_attenuation_stage,
 665    &_tnl_render_stage,
 666    0,
 667 };
 668
 669
 670
 671
 672 int fxDDInitFxMesaContext( fxMesaContext fxMesa )
 673 {
 674    int i;
 675    static int firsttime = 1;
 676
 677    for (i = 0 ; i < 256 ; i++) {
 678       gl_ubyte_to_float_255_color_tab[i] = (float) i;
 679    }
 680
 681    if (firsttime) {
 682       fxDDSetupInit();
 683       fxDDTrifuncInit();
 684       firsttime = 0;
 685    }
 686
 687    FX_setupGrVertexLayout();
 688
 689    if (getenv("FX_EMULATE_SINGLE_TMU"))
 690       fxMesa->haveTwoTMUs = GL_FALSE;
 691
 692    fxMesa->emulateTwoTMUs = fxMesa->haveTwoTMUs;
 693
 694    if (!getenv("FX_DONT_FAKE_MULTITEX"))
 695       fxMesa->emulateTwoTMUs = GL_TRUE;
 696
 697    if(getenv("FX_GLIDE_SWAPINTERVAL"))
 698       fxMesa->swapInterval=atoi(getenv("FX_GLIDE_SWAPINTERVAL"));
 699    else
 700       fxMesa->swapInterval=1;
 701
 702    if(getenv("MESA_FX_SWAP_PENDING"))
 703       fxMesa->maxPendingSwapBuffers=atoi(getenv("MESA_FX_SWAP_PENDING"));
 704    else
 705       fxMesa->maxPendingSwapBuffers=2;
 706
 707    if(getenv("MESA_FX_INFO"))
 708       fxMesa->verbose=GL_TRUE;
 709    else
 710       fxMesa->verbose=GL_FALSE;
 711
 712    fxMesa->color=0xffffffff;
 713    fxMesa->clearC=0;
 714    fxMesa->clearA=0;
 715
 716    fxMesa->stats.swapBuffer=0;
 717    fxMesa->stats.reqTexUpload=0;
 718    fxMesa->stats.texUpload=0;
 719    fxMesa->stats.memTexUpload=0;
 720
 721    fxMesa->tmuSrc=FX_TMU_NONE;
 722    fxMesa->lastUnitsMode=FX_UM_NONE;
 723    fxTMInit(fxMesa);
 724
 725    /* FX units setup */
 726
 727    fxMesa->unitsState.alphaTestEnabled=GL_FALSE;
 728    fxMesa->unitsState.alphaTestFunc=GR_CMP_ALWAYS;
 729    fxMesa->unitsState.alphaTestRefValue=0;
 730
 731    fxMesa->unitsState.blendEnabled=GL_FALSE;
 732    fxMesa->unitsState.blendSrcFuncRGB=GR_BLEND_ONE;
 733    fxMesa->unitsState.blendDstFuncRGB=GR_BLEND_ZERO;
 734    fxMesa->unitsState.blendSrcFuncAlpha=GR_BLEND_ONE;
 735    fxMesa->unitsState.blendDstFuncAlpha=GR_BLEND_ZERO;
 736
 737    fxMesa->unitsState.depthTestEnabled  =GL_FALSE;
 738    fxMesa->unitsState.depthMask         =GL_TRUE;
 739    fxMesa->unitsState.depthTestFunc     =GR_CMP_LESS;
 740
 741    FX_grColorMask(FXTRUE, fxMesa->haveAlphaBuffer ? FXTRUE : FXFALSE);
 742    if(fxMesa->haveDoubleBuffer) {
 743       fxMesa->currentFB=GR_BUFFER_BACKBUFFER;
 744       FX_grRenderBuffer(GR_BUFFER_BACKBUFFER);
 745    } else {
 746       fxMesa->currentFB=GR_BUFFER_FRONTBUFFER;
 747       FX_grRenderBuffer(GR_BUFFER_FRONTBUFFER);
 748    }
 749
 750    fxMesa->state = malloc(FX_grGetInteger(FX_GLIDE_STATE_SIZE));
 751    fxMesa->fogTable = malloc(FX_grGetInteger(FX_FOG_TABLE_ENTRIES) *
 752                              sizeof(GrFog_t));
 753
 754    if (!fxMesa->state || !fxMesa->fogTable) {
 755       if (fxMesa->state) free(fxMesa->state);
 756       if (fxMesa->fogTable) free(fxMesa->fogTable);
 757       return 0;
 758    }
 759
 760    if(fxMesa->haveZBuffer)
 761       FX_grDepthBufferMode(GR_DEPTHBUFFER_ZBUFFER);
 762
 763 #if (!FXMESA_USE_ARGB)
 764    FX_grLfbWriteColorFormat(GR_COLORFORMAT_ABGR); /* Not every Glide has this */
 765 #endif
 766
 767    fxMesa->textureAlign=FX_grGetInteger(FX_TEXTURE_ALIGN);
 768    fxMesa->glCtx->Const.MaxTextureLevels=9;
 769    fxMesa->glCtx->Const.MaxTextureSize=256;
 770    fxMesa->glCtx->Const.MaxTextureUnits=fxMesa->emulateTwoTMUs ? 2 : 1;
 771    fxMesa->new_state = _NEW_ALL;
 772
 773    /* Initialize the software rasterizer and helper modules.
 774     */
 775    _swrast_CreateContext( fxMesa->glCtx );
 776    _ac_CreateContext( fxMesa->glCtx );
 777    _tnl_CreateContext( fxMesa->glCtx );
 778    _swsetup_CreateContext( fxMesa->glCtx );
 779
 780    _tnl_destroy_pipeline( fxMesa->glCtx );
 781    _tnl_install_pipeline( fxMesa->glCtx, fx_pipeline );
 782
 783    fxAllocVB( fxMesa->glCtx );
 784
 785    fxSetupDDPointers(fxMesa->glCtx);
 786
 787    /* Tell the software rasterizer to use pixel fog always.
 788     */
 789    _swrast_allow_vertex_fog( fxMesa->glCtx, GL_FALSE );
 790    _swrast_allow_pixel_fog( fxMesa->glCtx, GL_TRUE );
 791
 792    /* Tell tnl not to calculate or use vertex fog factors.  (Needed to
 793     * tell render stage not to clip fog coords).
 794     */
 795 /*     _tnl_calculate_vertex_fog( fxMesa->glCtx, GL_FALSE ); */
 796
 797    fxDDInitExtensions(fxMesa->glCtx);
 798
 799 #ifdef FXVTXFMT
 800    fxDDInitVtxfmt(fxMesa->glCtx);
 801 #endif
 802
 803    FX_grGlideGetState((GrState*)fxMesa->state);
 804
 805    /* Run the config file */
 806    _mesa_context_initialize( fxMesa->glCtx );
 807
 808    return 1;
 809 }
 810
 811 /* Undo the above.
 812  */
 813 void fxDDDestroyFxMesaContext( fxMesaContext fxMesa )
 814 {
 815    _swsetup_DestroyContext( fxMesa->glCtx );
 816    _tnl_DestroyContext( fxMesa->glCtx );
 817    _ac_DestroyContext( fxMesa->glCtx );
 818    _swrast_DestroyContext( fxMesa->glCtx );
 819
 820    if (fxMesa->state)
 821       free(fxMesa->state);
 822    if (fxMesa->fogTable)
 823       free(fxMesa->fogTable);
 824    fxTMClose(fxMesa);
 825    fxFreeVB(fxMesa->glCtx);
 826 }
 827
 828
 829
 830
 831 void fxDDInitExtensions( GLcontext *ctx )
 832 {
 833    fxMesaContext fxMesa=(fxMesaContext)ctx->DriverCtx;
 834
 835    gl_extensions_disable(ctx, "GL_EXT_blend_logic_op");
 836    gl_extensions_disable(ctx, "GL_EXT_blend_minmax");
 837    gl_extensions_disable(ctx, "GL_EXT_blend_subtract");
 838    gl_extensions_disable(ctx, "GL_EXT_blend_color");
 839    gl_extensions_disable(ctx, "GL_EXT_fog_coord");
 840
 841    if (1)
 842       gl_extensions_disable(ctx, "GL_EXT_point_parameters");
 843
 844    gl_extensions_add(ctx, GL_TRUE, "3DFX_set_global_palette", 0);
 845
 846    if (!fxMesa->haveTwoTMUs)
 847       gl_extensions_disable(ctx, "GL_EXT_texture_env_add");
 848
 849    if (!fxMesa->emulateTwoTMUs)
 850       gl_extensions_disable(ctx, "GL_ARB_multitexture");
 851 }
 852
 853
 854 /************************************************************************/
 855 /************************************************************************/
 856 /************************************************************************/
 857
 858 /* Check if the hardware supports the current context
 859  *
 860  * Performs similar work to fxDDChooseRenderState() - should be merged.
 861  */
 862 static GLboolean fxIsInHardware(GLcontext *ctx)
 863 {
 864    fxMesaContext fxMesa=(fxMesaContext)ctx->DriverCtx;
 865
 866    if (ctx->RenderMode != GL_RENDER)
 867      return GL_FALSE;
 868
 869   if (ctx->Stencil.Enabled ||
 870       ctx->Color.MultiDrawBuffer ||
 871       ((ctx->Color.BlendEnabled) && (ctx->Color.BlendEquation!=GL_FUNC_ADD_EXT)) ||
 872       ((ctx->Color.ColorLogicOpEnabled) && (ctx->Color.LogicOp!=GL_COPY)) ||
 873       (ctx->Light.Model.ColorControl==GL_SEPARATE_SPECULAR_COLOR) ||
 874       (!((ctx->Color.ColorMask[RCOMP]==ctx->Color.ColorMask[GCOMP]) &&
 875          (ctx->Color.ColorMask[GCOMP]==ctx->Color.ColorMask[BCOMP]) &&
 876          (ctx->Color.ColorMask[ACOMP]==ctx->Color.ColorMask[ACOMP])))
 877     )
 878   {
 879      return GL_FALSE;
 880   }
 881   /* Unsupported texture/multitexture cases */
 882
 883   if (fxMesa->emulateTwoTMUs) {
 884     if (ctx->Texture._ReallyEnabled & (TEXTURE0_3D | TEXTURE1_3D))
 885       return GL_FALSE;  /* can't do 3D textures */
 886     if (ctx->Texture._ReallyEnabled & (TEXTURE0_1D | TEXTURE1_1D))
 887       return GL_FALSE;  /* can't do 1D textures */
 888
 889     if (ctx->Texture._ReallyEnabled & TEXTURE0_2D) {
 890       if (ctx->Texture.Unit[0].EnvMode == GL_BLEND &&
 891           (ctx->Texture._ReallyEnabled & TEXTURE1_2D ||
 892            ctx->Texture.Unit[0].EnvColor[0] != 0 ||
 893            ctx->Texture.Unit[0].EnvColor[1] != 0 ||
 894            ctx->Texture.Unit[0].EnvColor[2] != 0 ||
 895            ctx->Texture.Unit[0].EnvColor[3] != 1)) {
 896         return GL_FALSE;
 897       }
 898       if (ctx->Texture.Unit[0]._Current->Image[0]->Border > 0)
 899         return GL_FALSE;
 900     }
 901
 902     if (ctx->Texture._ReallyEnabled & TEXTURE1_2D) {
 903       if (ctx->Texture.Unit[1].EnvMode == GL_BLEND)
 904         return GL_FALSE;
 905       if (ctx->Texture.Unit[0]._Current->Image[0]->Border > 0)
 906         return GL_FALSE;
 907     }
 908
 909     if (MESA_VERBOSE & (VERBOSE_DRIVER|VERBOSE_TEXTURE))
 910        fprintf(stderr, "fxMesa: fxIsInHardware, envmode is %s/%s\n",
 911                gl_lookup_enum_by_nr(ctx->Texture.Unit[0].EnvMode),
 912                gl_lookup_enum_by_nr(ctx->Texture.Unit[1].EnvMode));
 913
 914     /* KW: This was wrong (I think) and I changed it... which doesn't mean
 915      * it is now correct...
 916      */
 917     if((ctx->_Enabled & (TEXTURE0_1D | TEXTURE0_2D | TEXTURE0_3D)) &&
 918        (ctx->_Enabled & (TEXTURE1_1D | TEXTURE1_2D | TEXTURE1_3D)))
 919     {
 920        /* Can't use multipass to blend a multitextured triangle - fall
 921         * back to software.
 922         */
 923       if (!fxMesa->haveTwoTMUs && ctx->Color.BlendEnabled) {
 924           return GL_FALSE;
 925       }
 926
 927        if ((ctx->Texture.Unit[0].EnvMode!=ctx->Texture.Unit[1].EnvMode) &&
 928            (ctx->Texture.Unit[0].EnvMode!=GL_MODULATE) &&
 929            (ctx->Texture.Unit[0].EnvMode!=GL_REPLACE)) /* q2, seems ok... */
 930        {
 931           if (MESA_VERBOSE&VERBOSE_DRIVER)
 932             fprintf(stderr, "fxMesa: unsupported multitex env mode\n");
 933           return GL_FALSE;
 934        }
 935     }
 936   } else {
 937     if((ctx->_Enabled & (TEXTURE1_1D | TEXTURE1_2D | TEXTURE1_3D)) ||
 938        /* Not very well written ... */
 939        ((ctx->_Enabled & TEXTURE0_1D) &&
 940         (!(ctx->_Enabled & TEXTURE0_2D)))
 941        ) {
 942       return GL_FALSE;
 943     }
 944
 945
 946     if((ctx->Texture._ReallyEnabled & TEXTURE0_2D) &&
 947        (ctx->Texture.Unit[0].EnvMode==GL_BLEND)) {
 948       return GL_FALSE;
 949     }
 950   }
 951
 952   return GL_TRUE;
 953 }
 954
 955 static void update_texture_scales( GLcontext *ctx )
 956 {
 957    fxMesaContext fxMesa = FX_CONTEXT(ctx);
 958    struct gl_texture_unit *t0 = &ctx->Texture.Unit[fxMesa->tmu_source[0]];
 959    struct gl_texture_unit *t1 = &ctx->Texture.Unit[fxMesa->tmu_source[1]];
 960
 961    if (t0 && t0->_Current && FX_TEXTURE_DATA(t0)) {
 962       fxMesa->s0scale = FX_TEXTURE_DATA(t0)->sScale;
 963       fxMesa->t0scale = FX_TEXTURE_DATA(t0)->tScale;
 964       fxMesa->inv_s0scale = 1.0 / fxMesa->s0scale;
 965       fxMesa->inv_t0scale = 1.0 / fxMesa->t0scale;
 966    }
 967
 968    if (t1 && t1->_Current && FX_TEXTURE_DATA(t1)) {
 969       fxMesa->s1scale = FX_TEXTURE_DATA(t1)->sScale;
 970       fxMesa->t1scale = FX_TEXTURE_DATA(t1)->tScale;
 971       fxMesa->inv_s1scale = 1.0 / fxMesa->s1scale;
 972       fxMesa->inv_t1scale = 1.0 / fxMesa->t1scale;
 973    }
 974 }
 975
 976 static void fxDDUpdateDDPointers(GLcontext *ctx, GLuint new_state)
 977 {
 978    fxMesaContext fxMesa = FX_CONTEXT(ctx);
 979
 980    _swrast_InvalidateState( ctx, new_state );
 981    _ac_InvalidateState( ctx, new_state );
 982    _tnl_InvalidateState( ctx, new_state );
 983    _swsetup_InvalidateState( ctx, new_state );
 984
 985    /* Recalculate fog table on projection matrix changes.  This used to
 986     * be triggered by the NearFar callback.
 987     */
 988    if (new_state & _NEW_PROJECTION)
 989       fxMesa->new_state |= FX_NEW_FOG;
 990
 991    if (new_state & (_FX_NEW_IS_IN_HARDWARE |
 992                     _FX_NEW_RENDERSTATE |
 993                     _FX_NEW_SETUP_FUNCTION |
 994                     _NEW_TEXTURE))
 995    {
 996       fxMesaContext fxMesa=(fxMesaContext)ctx->DriverCtx;
 997
 998       if (new_state & _FX_NEW_IS_IN_HARDWARE)
 999          fxMesa->is_in_hardware = fxIsInHardware(ctx);
1000
1001       if (fxMesa->new_state)
1002          fxSetupFXUnits(ctx);
1003
1004       if (new_state & _FX_NEW_RENDERSTATE)
1005          fxDDChooseRenderState( ctx );
1006
1007       if (new_state & _FX_NEW_SETUP_FUNCTION)
1008          ctx->Driver.BuildProjectedVertices = fx_validate_BuildProjVerts;
1009
1010       if (new_state & _NEW_TEXTURE)
1011          update_texture_scales( ctx );
1012
1013    }
1014
1015 #ifdef FXVTXFMT
1016    if (fxMesa->allow_vfmt) {
1017       if (new_state & _NEW_LIGHT)
1018          fx_update_lighting( ctx );
1019
1020       if (new_state & _FX_NEW_VTXFMT)
1021          fxDDCheckVtxfmt( ctx );
1022    }
1023 #endif
1024 }
1025
1026 static void fxDDRenderPrimitive( GLcontext *ctx, GLenum mode )
1027 {
1028    fxMesaContext fxMesa=(fxMesaContext)ctx->DriverCtx;
1029
1030    if (!fxMesa->is_in_hardware) {
1031       _swsetup_RenderPrimitive( ctx, mode );
1032    }
1033    else {
1034       fxMesa->render_prim = mode;
1035    }
1036 }
1037
1038
1039 static void fxDDRenderStart( GLcontext *ctx )
1040 {
1041    fxMesaContext fxMesa=(fxMesaContext)ctx->DriverCtx;
1042
1043    _swsetup_RenderStart( ctx );
1044
1045    if (fxMesa->new_state) {
1046       fxSetupFXUnits( ctx );
1047    }
1048 }
1049
1050 static void fxDDRenderFinish( GLcontext *ctx )
1051 {
1052    fxMesaContext fxMesa=(fxMesaContext)ctx->DriverCtx;
1053
1054    if (!fxMesa->is_in_hardware) {
1055       _swsetup_RenderFinish( ctx );
1056    }
1057 }
1058
1059
1060
1061 void fxSetupDDPointers(GLcontext *ctx)
1062 {
1063    if (MESA_VERBOSE&VERBOSE_DRIVER) {
1064       fprintf(stderr,"fxmesa: fxSetupDDPointers()\n");
1065    }
1066
1067    ctx->Driver.UpdateState=fxDDUpdateDDPointers;
1068
1069    ctx->Driver.WriteDepthSpan=fxDDWriteDepthSpan;
1070    ctx->Driver.WriteDepthPixels=fxDDWriteDepthPixels;
1071    ctx->Driver.ReadDepthSpan=fxDDReadDepthSpan;
1072    ctx->Driver.ReadDepthPixels=fxDDReadDepthPixels;
1073
1074    ctx->Driver.GetString=fxDDGetString;
1075
1076    ctx->Driver.ClearIndex=NULL;
1077    ctx->Driver.ClearColor=fxDDClearColor;
1078    ctx->Driver.Clear=fxDDClear;
1079
1080    ctx->Driver.SetDrawBuffer=fxDDSetDrawBuffer;
1081    ctx->Driver.SetReadBuffer=fxDDSetReadBuffer;
1082    ctx->Driver.GetBufferSize=fxDDBufferSize;
1083
1084    ctx->Driver.Accum = _swrast_Accum;
1085    ctx->Driver.Bitmap = fxDDDrawBitmap;
1086    ctx->Driver.CopyPixels = _swrast_CopyPixels;
1087    ctx->Driver.DrawPixels = _swrast_DrawPixels;
1088    ctx->Driver.ReadPixels = fxDDReadPixels;
1089    ctx->Driver.ResizeBuffersMESA = _swrast_alloc_buffers;
1090
1091    ctx->Driver.Finish=fxDDFinish;
1092    ctx->Driver.Flush=NULL;
1093
1094    ctx->Driver.RenderStart=fxDDRenderStart;
1095    ctx->Driver.RenderFinish=fxDDRenderFinish;
1096    ctx->Driver.ResetLineStipple=_swrast_ResetLineStipple;
1097    ctx->Driver.RenderPrimitive=fxDDRenderPrimitive;
1098
1099    /* Install the oldstyle interp functions:
1100     */
1101    ctx->Driver.RenderInterp = _swsetup_RenderInterp;
1102    ctx->Driver.RenderCopyPV = _swsetup_RenderCopyPV;
1103    ctx->Driver.RenderClippedLine = _swsetup_RenderClippedLine;
1104    ctx->Driver.RenderClippedPolygon = _swsetup_RenderClippedPolygon;
1105
1106    ctx->Driver.TexImage2D = fxDDTexImage2D;
1107    ctx->Driver.TexSubImage2D = fxDDTexSubImage2D;
1108    ctx->Driver.TexEnv = fxDDTexEnv;
1109    ctx->Driver.TexParameter = fxDDTexParam;
1110    ctx->Driver.BindTexture = fxDDTexBind;
1111    ctx->Driver.DeleteTexture = fxDDTexDel;
1112    ctx->Driver.UpdateTexturePalette = fxDDTexPalette;
1113
1114    ctx->Driver.AlphaFunc=fxDDAlphaFunc;
1115    ctx->Driver.BlendFunc=fxDDBlendFunc;
1116    ctx->Driver.DepthFunc=fxDDDepthFunc;
1117    ctx->Driver.DepthMask=fxDDDepthMask;
1118    ctx->Driver.ColorMask=fxDDColorMask;
1119    ctx->Driver.Fogfv=fxDDFogfv;
1120    ctx->Driver.Scissor=fxDDScissor;
1121    ctx->Driver.FrontFace=fxDDFrontFace;
1122    ctx->Driver.CullFace=fxDDCullFace;
1123    ctx->Driver.ShadeModel=fxDDShadeModel;
1124    ctx->Driver.Enable=fxDDEnable;
1125
1126
1127
1128    fxSetupDDSpanPointers(ctx);
1129    fxDDUpdateDDPointers(ctx,~0);
1130 }
1131
1132
1133 #else
1134
1135
1136 /*
1137  * Need this to provide at least one external definition.
1138  */
1139
1140 extern int gl_fx_dummy_function_dd(void);
1141 int gl_fx_dummy_function_dd(void)
1142 {
1143   return 0;
1144 }
1145
1146 #endif  /* FX */
1147