src/mesa/drivers/x11/xm_dd.c

   1 /* $Id: xm_dd.c,v 1.20 2001/04/03 16:19:54 brianp Exp $ */
   2
   3 /*
   4  * Mesa 3-D graphics library
   5  * Version:  3.5
   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
  28 #include "glxheader.h"
  29 #include "context.h"
  30 #include "depth.h"
  31 #include "drawpix.h"
  32 #include "extensions.h"
  33 #include "macros.h"
  34 #include "mem.h"
  35 #include "mtypes.h"
  36 #include "state.h"
  37 #include "texstore.h"
  38 #include "xmesaP.h"
  39 #include "array_cache/acache.h"
  40 #include "swrast/swrast.h"
  41 #include "swrast/s_alphabuf.h"
  42 #include "swrast_setup/swrast_setup.h"
  43 #include "tnl/tnl.h"
  44 #include "tnl/t_context.h"
  45
  46
  47 /*
  48  * Return the size (width,height of the current color buffer.
  49  * This function should be called by the glViewport function because
  50  * glViewport is often called when the window gets resized.  We need to
  51  * update some X/Mesa stuff when that happens.
  52  * Output:  width - width of buffer in pixels.
  53  *          height - height of buffer in pixels.
  54  */
  55 static void
  56 get_buffer_size( GLcontext *ctx, GLuint *width, GLuint *height )
  57 {
  58    const XMesaContext xmesa = (XMesaContext) ctx->DriverCtx;
  59    unsigned int winwidth, winheight;
  60 #ifndef XFree86Server
  61    Window root;
  62    int winx, winy;
  63    unsigned int bw, d;
  64
  65    _glthread_LOCK_MUTEX(_xmesa_lock);
  66    XGetGeometry( xmesa->display, xmesa->xm_buffer->frontbuffer, &root,
  67                  &winx, &winy, &winwidth, &winheight, &bw, &d );
  68    _glthread_UNLOCK_MUTEX(_xmesa_lock);
  69 #else
  70
  71    winwidth = xmesa->xm_buffer->frontbuffer->width;
  72    winheight = xmesa->xm_buffer->frontbuffer->height;
  73 #endif
  74
  75    *width = winwidth;
  76    *height = winheight;
  77
  78    if (   winwidth!=xmesa->xm_buffer->width
  79        || winheight!=xmesa->xm_buffer->height) {
  80       xmesa->xm_buffer->width = winwidth;
  81       xmesa->xm_buffer->height = winheight;
  82       xmesa_alloc_back_buffer( xmesa->xm_buffer );
  83    }
  84
  85    /* Needed by FLIP macro */
  86    xmesa->xm_buffer->bottom = (int) winheight - 1;
  87
  88    if (xmesa->xm_buffer->backimage) {
  89       /* Needed by PIXELADDR1 macro */
  90       xmesa->xm_buffer->ximage_width1
  91                   = xmesa->xm_buffer->backimage->bytes_per_line;
  92       xmesa->xm_buffer->ximage_origin1
  93                   = (GLubyte *) xmesa->xm_buffer->backimage->data
  94                     + xmesa->xm_buffer->ximage_width1 * (winheight-1);
  95
  96       /* Needed by PIXELADDR2 macro */
  97       xmesa->xm_buffer->ximage_width2
  98                   = xmesa->xm_buffer->backimage->bytes_per_line / 2;
  99       xmesa->xm_buffer->ximage_origin2
 100                   = (GLushort *) xmesa->xm_buffer->backimage->data
 101                     + xmesa->xm_buffer->ximage_width2 * (winheight-1);
 102
 103       /* Needed by PIXELADDR3 macro */
 104       xmesa->xm_buffer->ximage_width3
 105                   = xmesa->xm_buffer->backimage->bytes_per_line;
 106       xmesa->xm_buffer->ximage_origin3
 107                   = (GLubyte *) xmesa->xm_buffer->backimage->data
 108                     + xmesa->xm_buffer->ximage_width3 * (winheight-1);
 109
 110       /* Needed by PIXELADDR4 macro */
 111       xmesa->xm_buffer->ximage_width4 = xmesa->xm_buffer->backimage->width;
 112       xmesa->xm_buffer->ximage_origin4
 113                   = (GLuint *) xmesa->xm_buffer->backimage->data
 114                     + xmesa->xm_buffer->ximage_width4 * (winheight-1);
 115    }
 116 }
 117
 118
 119 static void
 120 finish( GLcontext *ctx )
 121 {
 122 #ifdef XFree86Server
 123       /* NOT_NEEDED */
 124 #else
 125    const XMesaContext xmesa = (XMesaContext) ctx->DriverCtx;
 126    if (xmesa) {
 127       _glthread_LOCK_MUTEX(_xmesa_lock);
 128       XSync( xmesa->display, False );
 129       _glthread_UNLOCK_MUTEX(_xmesa_lock);
 130    }
 131 #endif
 132 }
 133
 134
 135 static void
 136 flush( GLcontext *ctx )
 137 {
 138 #ifdef XFree86Server
 139       /* NOT_NEEDED */
 140 #else
 141    const XMesaContext xmesa = (XMesaContext) ctx->DriverCtx;
 142    if (xmesa) {
 143       _glthread_LOCK_MUTEX(_xmesa_lock);
 144       XFlush( xmesa->display );
 145       _glthread_UNLOCK_MUTEX(_xmesa_lock);
 146    }
 147 #endif
 148 }
 149
 150
 151
 152
 153 static GLboolean
 154 set_draw_buffer( GLcontext *ctx, GLenum mode )
 155 {
 156    const XMesaContext xmesa = (XMesaContext) ctx->DriverCtx;
 157    if (mode == GL_FRONT_LEFT) {
 158       /* write to front buffer */
 159       xmesa->xm_buffer->buffer = xmesa->xm_buffer->frontbuffer;
 160       xmesa_update_span_funcs(ctx);
 161       return GL_TRUE;
 162    }
 163    else if (mode==GL_BACK_LEFT && xmesa->xm_buffer->db_state) {
 164       /* write to back buffer */
 165       if (xmesa->xm_buffer->backpixmap) {
 166          xmesa->xm_buffer->buffer =
 167              (XMesaDrawable)xmesa->xm_buffer->backpixmap;
 168       }
 169       else if (xmesa->xm_buffer->backimage) {
 170          xmesa->xm_buffer->buffer = None;
 171       }
 172       else {
 173          /* just in case there wasn't enough memory for back buffer */
 174          xmesa->xm_buffer->buffer = xmesa->xm_buffer->frontbuffer;
 175       }
 176       xmesa_update_span_funcs(ctx);
 177       return GL_TRUE;
 178    }
 179    else {
 180       return GL_FALSE;
 181    }
 182 }
 183
 184
 185 void
 186 xmesa_set_read_buffer( GLcontext *ctx, GLframebuffer *buffer, GLenum mode )
 187 {
 188    XMesaBuffer target;
 189    const XMesaContext xmesa = (XMesaContext) ctx->DriverCtx;
 190
 191    if (buffer == ctx->DrawBuffer) {
 192       target = xmesa->xm_buffer;
 193       xmesa->use_read_buffer = GL_FALSE;
 194    }
 195    else {
 196       ASSERT(buffer == ctx->ReadBuffer);
 197       target = xmesa->xm_read_buffer;
 198       xmesa->use_read_buffer = GL_TRUE;
 199    }
 200
 201    if (mode == GL_FRONT_LEFT) {
 202       target->buffer = target->frontbuffer;
 203       xmesa_update_span_funcs(ctx);
 204    }
 205    else if (mode==GL_BACK_LEFT && xmesa->xm_read_buffer->db_state) {
 206       if (target->backpixmap) {
 207          target->buffer = (XMesaDrawable)xmesa->xm_buffer->backpixmap;
 208       }
 209       else if (target->backimage) {
 210          target->buffer = None;
 211       }
 212       else {
 213          /* just in case there wasn't enough memory for back buffer */
 214          target->buffer = target->frontbuffer;
 215       }
 216       xmesa_update_span_funcs(ctx);
 217    }
 218    else {
 219       _mesa_problem(ctx, "invalid buffer in set_read_buffer() in xmesa2.c");
 220    }
 221 }
 222
 223
 224
 225 static void
 226 clear_index( GLcontext *ctx, GLuint index )
 227 {
 228    const XMesaContext xmesa = (XMesaContext) ctx->DriverCtx;
 229    xmesa->clearpixel = (unsigned long) index;
 230    XMesaSetForeground( xmesa->display, xmesa->xm_buffer->cleargc,
 231                        (unsigned long) index );
 232 }
 233
 234
 235 static void
 236 clear_color( GLcontext *ctx, const GLchan color[4] )
 237 {
 238    const XMesaContext xmesa = (XMesaContext) ctx->DriverCtx;
 239    xmesa->clearcolor[0] = color[0];
 240    xmesa->clearcolor[1] = color[1];
 241    xmesa->clearcolor[2] = color[2];
 242    xmesa->clearcolor[3] = color[3];
 243    xmesa->clearpixel = xmesa_color_to_pixel( xmesa, color[0], color[1],
 244                                              color[2], color[3],
 245                                              xmesa->xm_visual->undithered_pf );
 246    _glthread_LOCK_MUTEX(_xmesa_lock);
 247    XMesaSetForeground( xmesa->display, xmesa->xm_buffer->cleargc,
 248                        xmesa->clearpixel );
 249    _glthread_UNLOCK_MUTEX(_xmesa_lock);
 250 }
 251
 252
 253
 254 /* Set index mask ala glIndexMask */
 255 static void
 256 index_mask( GLcontext *ctx, GLuint mask )
 257 {
 258    const XMesaContext xmesa = (XMesaContext) ctx->DriverCtx;
 259    if (xmesa->xm_buffer->buffer != XIMAGE) {
 260       unsigned long m;
 261       if (mask==0xffffffff) {
 262          m = ((unsigned long)~0L);
 263       }
 264       else {
 265          m = (unsigned long) mask;
 266       }
 267       XMesaSetPlaneMask( xmesa->display, xmesa->xm_buffer->cleargc, m );
 268    }
 269 }
 270
 271
 272 /* Implements glColorMask() */
 273 static void
 274 color_mask(GLcontext *ctx,
 275            GLboolean rmask, GLboolean gmask, GLboolean bmask, GLboolean amask)
 276 {
 277    const XMesaContext xmesa = (XMesaContext) ctx->DriverCtx;
 278    int xclass = GET_VISUAL_CLASS(xmesa->xm_visual);
 279    (void) amask;
 280
 281    if (xmesa->xm_buffer->buffer != XIMAGE
 282        && (xclass == TrueColor || xclass == DirectColor)) {
 283       unsigned long m;
 284       if (rmask && gmask && bmask) {
 285          m = ((unsigned long)~0L);
 286       }
 287       else {
 288          m = 0;
 289          if (rmask)   m |= GET_REDMASK(xmesa->xm_visual);
 290          if (gmask)   m |= GET_GREENMASK(xmesa->xm_visual);
 291          if (bmask)   m |= GET_BLUEMASK(xmesa->xm_visual);
 292       }
 293       XMesaSetPlaneMask( xmesa->display, xmesa->xm_buffer->cleargc, m );
 294    }
 295 }
 296
 297
 298
 299 /**********************************************************************/
 300 /*** glClear implementations                                        ***/
 301 /**********************************************************************/
 302
 303
 304 static void
 305 clear_front_pixmap( GLcontext *ctx, GLboolean all,
 306                     GLint x, GLint y, GLint width, GLint height )
 307 {
 308    const XMesaContext xmesa = (XMesaContext) ctx->DriverCtx;
 309    if (all) {
 310       XMesaFillRectangle( xmesa->display, xmesa->xm_buffer->frontbuffer,
 311                           xmesa->xm_buffer->cleargc,
 312                           0, 0,
 313                           xmesa->xm_buffer->width+1,
 314                           xmesa->xm_buffer->height+1 );
 315    }
 316    else {
 317       XMesaFillRectangle( xmesa->display, xmesa->xm_buffer->frontbuffer,
 318                           xmesa->xm_buffer->cleargc,
 319                           x, xmesa->xm_buffer->height - y - height,
 320                           width, height );
 321    }
 322 }
 323
 324
 325 static void
 326 clear_back_pixmap( GLcontext *ctx, GLboolean all,
 327                    GLint x, GLint y, GLint width, GLint height )
 328 {
 329    const XMesaContext xmesa = (XMesaContext) ctx->DriverCtx;
 330    if (all) {
 331       XMesaFillRectangle( xmesa->display, xmesa->xm_buffer->backpixmap,
 332                           xmesa->xm_buffer->cleargc,
 333                           0, 0,
 334                           xmesa->xm_buffer->width+1,
 335                           xmesa->xm_buffer->height+1 );
 336    }
 337    else {
 338       XMesaFillRectangle( xmesa->display, xmesa->xm_buffer->backpixmap,
 339                           xmesa->xm_buffer->cleargc,
 340                           x, xmesa->xm_buffer->height - y - height,
 341                           width, height );
 342    }
 343 }
 344
 345
 346 static void
 347 clear_8bit_ximage( GLcontext *ctx, GLboolean all,
 348                    GLint x, GLint y, GLint width, GLint height )
 349 {
 350    const XMesaContext xmesa = (XMesaContext) ctx->DriverCtx;
 351    if (all) {
 352       size_t n = xmesa->xm_buffer->backimage->bytes_per_line
 353          * xmesa->xm_buffer->backimage->height;
 354       MEMSET( xmesa->xm_buffer->backimage->data, xmesa->clearpixel, n );
 355    }
 356    else {
 357       GLint i;
 358       for (i=0;i<height;i++) {
 359          GLubyte *ptr = PIXELADDR1( xmesa->xm_buffer, x, y+i );
 360          MEMSET( ptr, xmesa->clearpixel, width );
 361       }
 362    }
 363 }
 364
 365
 366 static void
 367 clear_HPCR_ximage( GLcontext *ctx, GLboolean all,
 368                    GLint x, GLint y, GLint width, GLint height )
 369 {
 370    const XMesaContext xmesa = (XMesaContext) ctx->DriverCtx;
 371    if (all) {
 372       GLint i, c16 = (xmesa->xm_buffer->backimage->bytes_per_line>>4)<<4;
 373       GLubyte *ptr  = (GLubyte *)xmesa->xm_buffer->backimage->data;
 374       for (i=0; i<xmesa->xm_buffer->backimage->height; i++) {
 375          GLint j;
 376          GLubyte *sptr = xmesa->xm_visual->hpcr_clear_ximage_pattern[0];
 377          if (i&1) {
 378             sptr += 16;
 379          }
 380          for (j=0; j<c16; j+=16) {
 381             ptr[0] = sptr[0];
 382             ptr[1] = sptr[1];
 383             ptr[2] = sptr[2];
 384             ptr[3] = sptr[3];
 385             ptr[4] = sptr[4];
 386             ptr[5] = sptr[5];
 387             ptr[6] = sptr[6];
 388             ptr[7] = sptr[7];
 389             ptr[8] = sptr[8];
 390             ptr[9] = sptr[9];
 391             ptr[10] = sptr[10];
 392             ptr[11] = sptr[11];
 393             ptr[12] = sptr[12];
 394             ptr[13] = sptr[13];
 395             ptr[14] = sptr[14];
 396             ptr[15] = sptr[15];
 397             ptr += 16;
 398          }
 399          for (; j<xmesa->xm_buffer->backimage->bytes_per_line; j++) {
 400             *ptr = sptr[j&15];
 401             ptr++;
 402          }
 403       }
 404    }
 405    else {
 406       GLint i;
 407       for (i=y; i<y+height; i++) {
 408          GLubyte *ptr = PIXELADDR1( xmesa->xm_buffer, x, i );
 409          int j;
 410          GLubyte *sptr = xmesa->xm_visual->hpcr_clear_ximage_pattern[0];
 411          if (i&1) {
 412             sptr += 16;
 413          }
 414          for (j=x; j<x+width; j++) {
 415             *ptr = sptr[j&15];
 416             ptr++;
 417          }
 418       }
 419    }
 420 }
 421
 422
 423 static void
 424 clear_16bit_ximage( GLcontext *ctx, GLboolean all,
 425                     GLint x, GLint y, GLint width, GLint height )
 426 {
 427    const XMesaContext xmesa = (XMesaContext) ctx->DriverCtx;
 428    register GLuint pixel = (GLuint) xmesa->clearpixel;
 429    if (xmesa->swapbytes) {
 430       pixel = ((pixel >> 8) & 0x00ff) | ((pixel << 8) & 0xff00);
 431    }
 432    if (all) {
 433       register GLuint n;
 434       register GLuint *ptr4 = (GLuint *) xmesa->xm_buffer->backimage->data;
 435       if ((pixel & 0xff) == ((pixel >> 8) & 0xff)) {
 436          /* low and high bytes are equal so use memset() */
 437          n = xmesa->xm_buffer->backimage->bytes_per_line
 438             * xmesa->xm_buffer->height;
 439          MEMSET( ptr4, pixel & 0xff, n );
 440       }
 441       else {
 442          pixel = pixel | (pixel<<16);
 443          n = xmesa->xm_buffer->backimage->bytes_per_line
 444             * xmesa->xm_buffer->height / 4;
 445          do {
 446             *ptr4++ = pixel;
 447                n--;
 448          } while (n!=0);
 449
 450          if ((xmesa->xm_buffer->backimage->bytes_per_line *
 451               xmesa->xm_buffer->height) & 0x2)
 452             *(GLushort *)ptr4 = pixel & 0xffff;
 453       }
 454    }
 455    else {
 456       register int i, j;
 457       for (j=0;j<height;j++) {
 458          register GLushort *ptr2 = PIXELADDR2( xmesa->xm_buffer, x, y+j );
 459          for (i=0;i<width;i++) {
 460             *ptr2++ = pixel;
 461          }
 462       }
 463    }
 464 }
 465
 466
 467 /* Optimized code provided by Nozomi Ytow <noz@xfree86.org> */
 468 static void
 469 clear_24bit_ximage( GLcontext *ctx, GLboolean all,
 470                     GLint x, GLint y, GLint width, GLint height )
 471 {
 472    const XMesaContext xmesa = (XMesaContext) ctx->DriverCtx;
 473    const GLubyte r = xmesa->clearcolor[0];
 474    const GLubyte g = xmesa->clearcolor[1];
 475    const GLubyte b = xmesa->clearcolor[2];
 476    register GLuint clearPixel;
 477    if (xmesa->swapbytes) {
 478       clearPixel = (b << 16) | (g << 8) | r;
 479    }
 480    else {
 481       clearPixel = (r << 16) | (g << 8) | b;
 482    }
 483
 484    if (all) {
 485       if (r==g && g==b) {
 486          /* same value for all three components (gray) */
 487          const GLint w3 = xmesa->xm_buffer->width * 3;
 488          const GLint h = xmesa->xm_buffer->height;
 489          GLint i;
 490          for (i = 0; i < h; i++) {
 491             bgr_t *ptr3 = PIXELADDR3(xmesa->xm_buffer, 0, i);
 492             MEMSET(ptr3, r, w3);
 493          }
 494       }
 495       else {
 496          /* the usual case */
 497          const GLint w = xmesa->xm_buffer->width;
 498          const GLint h = xmesa->xm_buffer->height;
 499          GLint i, j;
 500          for (i = 0; i < h; i++) {
 501             bgr_t *ptr3 = PIXELADDR3(xmesa->xm_buffer, 0, i);
 502             for (j = 0; j < w; j++) {
 503                ptr3->r = r;
 504                ptr3->g = g;
 505                ptr3->b = b;
 506                ptr3++;
 507             }
 508          }
 509 #if 0 /* this code doesn't work for all window widths */
 510          register GLuint *ptr4 = (GLuint *) ptr3;
 511          register GLuint px;
 512          GLuint pixel4[3];
 513          register GLuint *p = pixel4;
 514          pixel4[0] = clearPixel | (clearPixel << 24);
 515          pixel4[1] = (clearPixel << 16) | (clearPixel >> 8);
 516          pixel4[2] = (clearPixel << 8) | (clearPixel >>  16);
 517          switch (3 & (int)(ptr3 - (bgr_t*) ptr4)){
 518             case 0:
 519                break;
 520             case 1:
 521                px = *ptr4 & 0x00ffffff;
 522                px |= pixel4[0] & 0xff000000;
 523                *ptr4++ = px;
 524                px = *ptr4 & 0xffff0000;
 525                px |= pixel4[2] & 0x0000ffff;
 526                *ptr4 = px;
 527                if (0 == --n)
 528                   break;
 529             case 2:
 530                px = *ptr4 & 0x0000fffff;
 531                px |= pixel4[1] & 0xffff0000;
 532                *ptr4++ = px;
 533                px = *ptr4 & 0xffffff00;
 534                px |= pixel4[2] & 0x000000ff;
 535                *ptr4 = px;
 536                if (0 == --n)
 537                   break;
 538             case 3:
 539                px = *ptr4 & 0x000000ff;
 540                px |= pixel4[2] & 0xffffff00;
 541                *ptr4++ = px;
 542                --n;
 543                break;
 544          }
 545          while (n > 3) {
 546             p = pixel4;
 547             *ptr4++ = *p++;
 548             *ptr4++ = *p++;
 549             *ptr4++ = *p++;
 550             n -= 4;
 551          }
 552          switch (n) {
 553             case 3:
 554                p = pixel4;
 555                *ptr4++ = *p++;
 556                *ptr4++ = *p++;
 557                px = *ptr4 & 0xffffff00;
 558                px |= clearPixel & 0xff;
 559                *ptr4 = px;
 560                break;
 561             case 2:
 562                p = pixel4;
 563                *ptr4++ = *p++;
 564                px = *ptr4 & 0xffff0000;
 565                px |= *p & 0xffff;
 566                *ptr4 = px;
 567                break;
 568             case 1:
 569                px = *ptr4 & 0xff000000;
 570                px |= *p & 0xffffff;
 571                *ptr4 = px;
 572                break;
 573             case 0:
 574                break;
 575          }
 576 #endif
 577       }
 578    }
 579    else {
 580       /* only clear subrect of color buffer */
 581       if (r==g && g==b) {
 582          /* same value for all three components (gray) */
 583          GLint j;
 584          for (j=0;j<height;j++) {
 585             bgr_t *ptr3 = PIXELADDR3( xmesa->xm_buffer, x, y+j );
 586             MEMSET(ptr3, r, 3 * width);
 587          }
 588       }
 589       else {
 590          /* non-gray clear color */
 591          GLint i, j;
 592          for (j = 0; j < height; j++) {
 593             bgr_t *ptr3 = PIXELADDR3( xmesa->xm_buffer, x, y+j );
 594             for (i = 0; i < width; i++) {
 595                ptr3->r = r;
 596                ptr3->g = g;
 597                ptr3->b = b;
 598                ptr3++;
 599             }
 600          }
 601 #if 0 /* this code might not always (seems ptr3 always == ptr4) */
 602          GLint j;
 603          GLuint pixel4[3];
 604          pixel4[0] = clearPixel | (clearPixel << 24);
 605          pixel4[1] = (clearPixel << 16) | (clearPixel >> 8);
 606          pixel4[2] = (clearPixel << 8) | (clearPixel >>  16);
 607          for (j=0;j<height;j++) {
 608             bgr_t *ptr3 = PIXELADDR3( xmesa->xm_buffer, x, y+j );
 609             register GLuint *ptr4 = (GLuint *)ptr3;
 610             register GLuint *p, px;
 611             GLuint w = width;
 612             switch (3 & (int)(ptr3 - (bgr_t*) ptr4)){
 613                case 0:
 614                   break;
 615                case 1:
 616                   px = *ptr4 & 0x00ffffff;
 617                   px |= pixel4[0] & 0xff000000;
 618                   *ptr4++ = px;
 619                   px = *ptr4 & 0xffff0000;
 620                   px |= pixel4[2] & 0x0000ffff;
 621                   *ptr4 = px;
 622                   if (0 == --w)
 623                      break;
 624                case 2:
 625                   px = *ptr4 & 0x0000fffff;
 626                   px |= pixel4[1] & 0xffff0000;
 627                   *ptr4++ = px;
 628                   px = *ptr4 & 0xffffff00;
 629                   px |= pixel4[2] & 0x000000ff;
 630                   *ptr4 = px;
 631                   if (0 == --w)
 632                      break;
 633                case 3:
 634                   px = *ptr4 & 0x000000ff;
 635                   px |= pixel4[2] & 0xffffff00;
 636                   *ptr4++ = px;
 637                   --w;
 638                   break;
 639             }
 640             while (w > 3){
 641                p = pixel4;
 642                *ptr4++ = *p++;
 643                *ptr4++ = *p++;
 644                *ptr4++ = *p++;
 645                w -= 4;
 646             }
 647             switch (w) {
 648                case 3:
 649                   p = pixel4;
 650                   *ptr4++ = *p++;
 651                   *ptr4++ = *p++;
 652                   px = *ptr4 & 0xffffff00;
 653                   px |= *p & 0xff;
 654                   *ptr4 = px;
 655                   break;
 656                case 2:
 657                   p = pixel4;
 658                   *ptr4++ = *p++;
 659                   px = *ptr4 & 0xffff0000;
 660                   px |= *p & 0xffff;
 661                   *ptr4 = px;
 662                   break;
 663                case 1:
 664                   px = *ptr4 & 0xff000000;
 665                   px |= pixel4[0] & 0xffffff;
 666                   *ptr4 = px;
 667                   break;
 668                case 0:
 669                   break;
 670             }
 671          }
 672 #endif
 673       }
 674    }
 675 }
 676
 677
 678 static void
 679 clear_32bit_ximage( GLcontext *ctx, GLboolean all,
 680                     GLint x, GLint y, GLint width, GLint height )
 681 {
 682    const XMesaContext xmesa = (XMesaContext) ctx->DriverCtx;
 683    register GLuint pixel = (GLuint) xmesa->clearpixel;
 684    if (xmesa->swapbytes) {
 685       pixel = ((pixel >> 24) & 0x000000ff)
 686             | ((pixel >> 8)  & 0x0000ff00)
 687             | ((pixel << 8)  & 0x00ff0000)
 688             | ((pixel << 24) & 0xff000000);
 689    }
 690    if (all) {
 691       register GLint n = xmesa->xm_buffer->width * xmesa->xm_buffer->height;
 692       register GLuint *ptr4 = (GLuint *) xmesa->xm_buffer->backimage->data;
 693       if (pixel==0) {
 694          MEMSET( ptr4, pixel, 4*n );
 695       }
 696       else {
 697          do {
 698             *ptr4++ = pixel;
 699             n--;
 700          } while (n!=0);
 701       }
 702    }
 703    else {
 704       register int i, j;
 705       register GLuint pixel = (GLuint) xmesa->clearpixel;
 706       for (j=0;j<height;j++) {
 707          register GLuint *ptr4 = PIXELADDR4( xmesa->xm_buffer, x, y+j );
 708          for (i=0;i<width;i++) {
 709             *ptr4++ = pixel;
 710          }
 711       }
 712    }
 713 }
 714
 715
 716 static void
 717 clear_nbit_ximage( GLcontext *ctx, GLboolean all,
 718                    GLint x, GLint y, GLint width, GLint height )
 719 {
 720    const XMesaContext xmesa = (XMesaContext) ctx->DriverCtx;
 721    XMesaImage *img = xmesa->xm_buffer->backimage;
 722    if (all) {
 723       register int i, j;
 724       width = xmesa->xm_buffer->width;
 725       height = xmesa->xm_buffer->height;
 726       for (j=0;j<height;j++) {
 727          for (i=0;i<width;i++) {
 728             XMesaPutPixel( img, i, j, xmesa->clearpixel );
 729          }
 730       }
 731    }
 732    else {
 733       /* TODO: optimize this */
 734       register int i, j;
 735       y = FLIP(xmesa->xm_buffer, y);
 736       for (j=0;j<height;j++) {
 737          for (i=0;i<width;i++) {
 738             XMesaPutPixel( img, x+i, y-j, xmesa->clearpixel );
 739          }
 740       }
 741    }
 742 }
 743
 744
 745
 746 static void
 747 clear_buffers( GLcontext *ctx, GLbitfield mask,
 748                GLboolean all, GLint x, GLint y, GLint width, GLint height )
 749 {
 750    const XMesaContext xmesa = (XMesaContext) ctx->DriverCtx;
 751    const GLuint *colorMask = (GLuint *) &ctx->Color.ColorMask;
 752
 753    if ((mask & (DD_FRONT_LEFT_BIT | DD_BACK_LEFT_BIT)) &&
 754        xmesa->xm_buffer->gl_buffer->UseSoftwareAlphaBuffers &&
 755        ctx->Color.ColorMask[ACOMP]) {
 756       _mesa_clear_alpha_buffers(ctx);
 757    }
 758
 759    /* we can't handle color or index masking */
 760    if (*colorMask == 0xffffffff && ctx->Color.IndexMask == 0xffffffff) {
 761       if (mask & DD_FRONT_LEFT_BIT) {
 762          ASSERT(xmesa->xm_buffer->front_clear_func);
 763          (*xmesa->xm_buffer->front_clear_func)( ctx, all, x, y, width, height );
 764          mask &= ~DD_FRONT_LEFT_BIT;
 765       }
 766       if (mask & DD_BACK_LEFT_BIT) {
 767          ASSERT(xmesa->xm_buffer->back_clear_func);
 768          (*xmesa->xm_buffer->back_clear_func)( ctx, all, x, y, width, height );
 769          mask &= ~DD_BACK_LEFT_BIT;
 770       }
 771    }
 772
 773    if (mask)
 774       _swrast_Clear( ctx, mask, all, x, y, width, height );
 775 }
 776
 777
 778 static void
 779 resize_buffers( GLcontext *ctx )
 780 {
 781    _swrast_alloc_buffers( ctx );
 782 }
 783
 784 #if 0
 785 /*
 786  * This function implements glDrawPixels() with an XPutImage call when
 787  * drawing to the front buffer (X Window drawable).
 788  * The image format must be GL_BGRA to match the PF_8R8G8B pixel format.
 789  * XXX top/bottom edge clipping is broken!
 790  */
 791 static GLboolean
 792 drawpixels_8R8G8B( GLcontext *ctx,
 793                    GLint x, GLint y, GLsizei width, GLsizei height,
 794                    GLenum format, GLenum type,
 795                    const struct gl_pixelstore_attrib *unpack,
 796                    const GLvoid *pixels )
 797 {
 798    const XMesaContext xmesa = (XMesaContext) ctx->DriverCtx;
 799    XMesaDisplay *dpy = xmesa->xm_visual->display;
 800    XMesaDrawable buffer = xmesa->xm_buffer->buffer;
 801    XMesaGC gc = xmesa->xm_buffer->gc;
 802    assert(dpy);
 803    assert(buffer);
 804    assert(gc);
 805
 806    /* XXX also check for pixel scale/bias/lookup/zooming! */
 807    if (format == GL_BGRA && type == GL_UNSIGNED_BYTE) {
 808       int dstX = x;
 809       int dstY = y;
 810       int w = width;
 811       int h = height;
 812       int srcX = unpack->SkipPixels;
 813       int srcY = unpack->SkipRows;
 814       if (_mesa_clip_pixelrect(ctx, &dstX, &dstY, &w, &h, &srcX, &srcY)) {
 815          XMesaImage ximage;
 816          MEMSET(&ximage, 0, sizeof(XMesaImage));
 817          ximage.width = width;
 818          ximage.height = height;
 819          ximage.format = ZPixmap;
 820          ximage.data = (char *) pixels + (height - 1) * width * 4;
 821          ximage.byte_order = LSBFirst;
 822          ximage.bitmap_unit = 32;
 823          ximage.bitmap_bit_order = LSBFirst;
 824          ximage.bitmap_pad = 32;
 825          ximage.depth = 24;
 826          ximage.bytes_per_line = -width * 4;
 827          ximage.bits_per_pixel = 32;
 828          ximage.red_mask   = 0xff0000;
 829          ximage.green_mask = 0x00ff00;
 830          ximage.blue_mask  = 0x0000ff;
 831          dstY = FLIP(xmesa->xm_buffer,dstY) - height + 1;
 832          XPutImage(dpy, buffer, gc, &ximage, srcX, srcY, dstX, dstY, w, h);
 833          return GL_TRUE;
 834       }
 835    }
 836    return GL_FALSE;
 837 }
 838 #endif
 839
 840
 841
 842 static const GLubyte *
 843 get_string( GLcontext *ctx, GLenum name )
 844 {
 845    (void) ctx;
 846    switch (name) {
 847       case GL_RENDERER:
 848 #ifdef XFree86Server
 849          return (const GLubyte *) "Mesa GLX Indirect";
 850 #else
 851          return (const GLubyte *) "Mesa X11";
 852 #endif
 853       case GL_VENDOR:
 854 #ifdef XFree86Server
 855          return (const GLubyte *) "VA Linux Systems, Inc.";
 856 #else
 857          return NULL;
 858 #endif
 859       default:
 860          return NULL;
 861    }
 862 }
 863
 864
 865 static void
 866 enable( GLcontext *ctx, GLenum pname, GLboolean state )
 867 {
 868    const XMesaContext xmesa = (XMesaContext) ctx->DriverCtx;
 869
 870    switch (pname) {
 871       case GL_DITHER:
 872          if (state)
 873             xmesa->pixelformat = xmesa->xm_visual->dithered_pf;
 874          else
 875             xmesa->pixelformat = xmesa->xm_visual->undithered_pf;
 876          break;
 877       default:
 878          ;  /* silence compiler warning */
 879    }
 880 }
 881
 882
 883 void xmesa_update_state( GLcontext *ctx, GLuint new_state )
 884 {
 885    const XMesaContext xmesa = (XMesaContext) ctx->DriverCtx;
 886
 887    /* Propogate statechange information to swrast and swrast_setup
 888     * modules.  The X11 driver has no internal GL-dependent state.
 889     */
 890    _swrast_InvalidateState( ctx, new_state );
 891    _ac_InvalidateState( ctx, new_state );
 892    _tnl_InvalidateState( ctx, new_state );
 893    _swsetup_InvalidateState( ctx, new_state );
 894
 895
 896    /* setup pointers to front and back buffer clear functions */
 897    xmesa->xm_buffer->front_clear_func = clear_front_pixmap;
 898    if (xmesa->xm_buffer->backpixmap != XIMAGE) {
 899       xmesa->xm_buffer->back_clear_func = clear_back_pixmap;
 900    }
 901    else if (sizeof(GLushort)!=2 || sizeof(GLuint)!=4) {
 902       xmesa->xm_buffer->back_clear_func = clear_nbit_ximage;
 903    }
 904    else switch (xmesa->xm_visual->BitsPerPixel) {
 905    case 8:
 906       if (xmesa->xm_visual->hpcr_clear_flag) {
 907          xmesa->xm_buffer->back_clear_func = clear_HPCR_ximage;
 908       }
 909       else {
 910          xmesa->xm_buffer->back_clear_func = clear_8bit_ximage;
 911       }
 912       break;
 913    case 16:
 914       xmesa->xm_buffer->back_clear_func = clear_16bit_ximage;
 915       break;
 916    case 24:
 917       xmesa->xm_buffer->back_clear_func = clear_24bit_ximage;
 918       break;
 919    case 32:
 920       xmesa->xm_buffer->back_clear_func = clear_32bit_ximage;
 921       break;
 922    default:
 923       xmesa->xm_buffer->back_clear_func = clear_nbit_ximage;
 924       break;
 925    }
 926
 927    xmesa_update_span_funcs(ctx);
 928 }
 929
 930
 931
 932 /* Setup pointers and other driver state that is constant for the life
 933  * of a context.
 934  */
 935 void xmesa_init_pointers( GLcontext *ctx )
 936 {
 937    TNLcontext *tnl;
 938
 939    ctx->Driver.GetString = get_string;
 940    ctx->Driver.GetBufferSize = get_buffer_size;
 941    ctx->Driver.Flush = flush;
 942    ctx->Driver.Finish = finish;
 943
 944    /* Software rasterizer pixel paths:
 945     */
 946    ctx->Driver.Accum = _swrast_Accum;
 947    ctx->Driver.Bitmap = _swrast_Bitmap;
 948    ctx->Driver.Clear = clear_buffers;
 949    ctx->Driver.ResizeBuffersMESA = resize_buffers;
 950    ctx->Driver.CopyPixels = _swrast_CopyPixels;
 951    ctx->Driver.DrawPixels = _swrast_DrawPixels;
 952    ctx->Driver.ReadPixels = _swrast_ReadPixels;
 953
 954    /* Software texture functions:
 955     */
 956    ctx->Driver.TexImage1D = _mesa_store_teximage1d;
 957    ctx->Driver.TexImage2D = _mesa_store_teximage2d;
 958    ctx->Driver.TexImage3D = _mesa_store_teximage3d;
 959    ctx->Driver.TexSubImage1D = _mesa_store_texsubimage1d;
 960    ctx->Driver.TexSubImage2D = _mesa_store_texsubimage2d;
 961    ctx->Driver.TexSubImage3D = _mesa_store_texsubimage3d;
 962    ctx->Driver.TestProxyTexImage = _mesa_test_proxy_teximage;
 963
 964    ctx->Driver.CopyTexImage1D = _swrast_copy_teximage1d;
 965    ctx->Driver.CopyTexImage2D = _swrast_copy_teximage2d;
 966    ctx->Driver.CopyTexSubImage1D = _swrast_copy_texsubimage1d;
 967    ctx->Driver.CopyTexSubImage2D = _swrast_copy_texsubimage2d;
 968    ctx->Driver.CopyTexSubImage3D = _swrast_copy_texsubimage3d;
 969
 970
 971    /* Swrast hooks for imaging extensions:
 972     */
 973    ctx->Driver.CopyColorTable = _swrast_CopyColorTable;
 974    ctx->Driver.CopyColorSubTable = _swrast_CopyColorSubTable;
 975    ctx->Driver.CopyConvolutionFilter1D = _swrast_CopyConvolutionFilter1D;
 976    ctx->Driver.CopyConvolutionFilter2D = _swrast_CopyConvolutionFilter2D;
 977
 978
 979    /* Statechange callbacks:
 980     */
 981    ctx->Driver.SetDrawBuffer = set_draw_buffer;
 982    ctx->Driver.ClearIndex = clear_index;
 983    ctx->Driver.ClearColor = clear_color;
 984    ctx->Driver.IndexMask = index_mask;
 985    ctx->Driver.ColorMask = color_mask;
 986    ctx->Driver.Enable = enable;
 987
 988
 989    /* Initialize the TNL driver interface:
 990     */
 991    tnl = TNL_CONTEXT(ctx);
 992    tnl->Driver.RenderStart = _swsetup_RenderStart;
 993    tnl->Driver.RenderFinish = _swsetup_RenderFinish;
 994    tnl->Driver.BuildProjectedVertices = _swsetup_BuildProjectedVertices;
 995    tnl->Driver.RenderPrimitive = _swsetup_RenderPrimitive;
 996    tnl->Driver.PointsFunc = _swsetup_Points;
 997    tnl->Driver.LineFunc = _swsetup_Line;
 998    tnl->Driver.TriangleFunc = _swsetup_Triangle;
 999    tnl->Driver.QuadFunc = _swsetup_Quad;
1000    tnl->Driver.ResetLineStipple = _swrast_ResetLineStipple;
1001    tnl->Driver.RenderInterp = _swsetup_RenderInterp;
1002    tnl->Driver.RenderCopyPV = _swsetup_RenderCopyPV;
1003    tnl->Driver.RenderClippedLine = _swsetup_RenderClippedLine;
1004    tnl->Driver.RenderClippedPolygon = _swsetup_RenderClippedPolygon;
1005
1006    (void) DitherValues;  /* silenced unused var warning */
1007 }