1: #ifndef lint
   2: static char *rcsid_bitpix_c = "$Header: bitpix.c,v 10.2 86/02/01 16:20:31 tony Rel $";
   3: #endif	lint
   4: #ifdef  sun
   5: /*
   6:  * The Sun X drivers are a product of Sun Microsystems, Inc. and are provided
   7:  * for unrestricted use provided that this legend is included on all tape
   8:  * media and as a part of the software program in whole or part.  Users
   9:  * may copy or modify these drivers without charge, but are not authorized
  10:  * to license or distribute them to anyone else except as part of a product or
  11:  * program developed by the user.
  12:  *
  13:  * THE SUN X DRIVERS ARE PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND
  14:  * INCLUDING THE WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A
  15:  * PARTICULAR PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE
  16:  * PRACTICE.
  17:  *
  18:  * The Sun X Drivers are provided with no support and without any obligation
  19:  * on the part of Sun Microsystems, Inc. to assist in their use, correction,
  20:  * modification or enhancement.
  21:  *
  22:  * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
  23:  * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY THE SUN X
  24:  * DRIVERS OR ANY PART THEREOF.
  25:  *
  26:  * In no event will Sun Microsystems, Inc. be liable for any lost revenue
  27:  * or profits or other special, indirect and consequential damages, even if
  28:  * Sun has been advised of the possibility of such damages.
  29:  *
  30:  * Sun Microsystems, Inc.
  31:  * 2550 Garcia Avenue
  32:  * Mountain View, California  94043
  33:  */
  34: 
  35: #ifndef lint
  36: static char sccsid[] = "@(#)bitpix.c 2.1 86/01/28 Copyright 1986 Sun Micro";
  37: #endif
  38: 
  39: /*-
  40:  * Copyright (c) 1986 by Sun Microsystems,  Inc.
  41:  */
  42: /* Copyright 1985 Massachusetts Institute of Technology */
  43: 
  44: /* Routines to cache bitmaps and pixmaps in the frame buffer memory:
  45:  *
  46:  *	StoreBitmap	Creates a bitmap
  47:  *	FreeBitmap	Frees the storage taken by a bitmap
  48:  *	CharBitmap	Creates a bitmap from a font character
  49:  *	StorePixmap	Creates a pixmap
  50:  *	FreePixmap	Frees the storage taken by a pixmap
  51:  *	MakePixmap	Create a pixmap from a bitmap
  52:  *	PixmapSave	Save a region of the screen
  53:  *	PixmapGet	Read a region of the screen
  54:  *
  55:  */
  56: 
  57: #include "Xsun.h"
  58: #include <errno.h>
  59: 
  60: extern int errno;
  61: extern struct pixrect *PixRect;
  62: 
  63: char *Xalloc();
  64: PIXMAP *MakePixmap();
  65: 
  66: BITMAP *StoreBitmap (width, height, data)
  67:     int width, height;
  68:     char *data;
  69: {
  70:     register BITMAP *bm;
  71:     int size;
  72: 
  73:     bm = (BITMAP *) Xalloc (sizeof (BITMAP));
  74:     bm->width = width;
  75:     bm->height = height;
  76:     bm->refcnt = 1;
  77: 
  78:     size = BitmapSize(width, height);
  79:     if ((bm->data = (caddr_t) malloc (size)) == NULL) {
  80:         free ((caddr_t) bm);
  81:         return (NULL);
  82:     }
  83:     bcopy (data, bm->data, size);
  84:     InvertPixelOrder((short *) bm->data, size>>1);
  85: 
  86:     return (bm);
  87: }
  88: 
  89: FreeBitmap (bitmap)
  90:     register BITMAP *bitmap;
  91: {
  92:     free ((caddr_t) bitmap->data);
  93:     free ((caddr_t) bitmap);
  94: }
  95: 
  96: BITMAP *CharBitmap (c, font)
  97:     unsigned c;
  98:     register FONT *font;
  99: {
 100:     int width;
 101:     register BITMAP *bm;
 102: 
 103:     if (c < font->first || c > font->last) {
 104:         errno = EINVAL;
 105:         return (NULL);
 106:     }
 107:     if (font->fixed)
 108:         width = font->avg_width;
 109:     else
 110:         width = ((struct pixfont *)font->data)->pf_char[c].pc_adv.x;
 111:     if (width == 0) {
 112:         errno = EINVAL;
 113:         return (NULL);
 114:     }
 115:     bm = (BITMAP *) Xalloc (sizeof (BITMAP));
 116:     bm->width = width;
 117:     bm->height = font->height;
 118:     bm->refcnt = 1;
 119:     if ((bm->data =
 120:         (caddr_t) malloc (BitmapSize(width, bm->height))) == NULL) {
 121:         free ((caddr_t) bm);
 122:         errno = ENOMEM;
 123:         return (NULL);
 124:     }
 125: 
 126:     CopyText ((caddr_t) &c, 1, font, bm);
 127:     return (bm);
 128: }
 129: 
 130: /*ARGSUSED*/
 131: PIXMAP *StorePixmap (width, height, format, data)
 132:     int width, height, format;
 133:     char *data;
 134: {
 135:     register PIXMAP *pm;
 136: 
 137:     if (PixRect->pr_depth == 1) {
 138:     register BITMAP *bm;
 139: 
 140:     bm = (BITMAP *) StoreBitmap(width, height, data);
 141:     if (bm == NULL)
 142:         return (NULL);
 143:     bm->refcnt = 0;
 144:     if ((pm = MakePixmap(bm, 1, 0)) == NULL) {
 145:         FreeBitmap(bm);
 146:         return (NULL);
 147:     }
 148:     }
 149:     else if (PixRect->pr_depth <= 8) {
 150:     char *     newdata;
 151:     int         size;
 152: 
 153:     pm = (PIXMAP *) Xalloc(sizeof(PIXMAP));
 154:     pm->width = width;
 155:     pm->height = height;
 156:     pm->refcnt = 1;
 157:     switch (format) {
 158:     case XYFormat:
 159:         size = XYPixmapSize(width, height, PixRect->pr_depth);
 160:         pm->kind = XYColorPixmap;
 161:         break;
 162:     case ZFormat:
 163:         size = BZPixmapSize(width, height);
 164:         if (width&1)
 165:         size += height;
 166:         pm->kind = ZColorPixmap;
 167:         break;
 168:     }
 169:     newdata = (char *) Xalloc(size);
 170:     if (width&1) {
 171:         register int i;
 172:         register char * old = data, *new = newdata;
 173: 
 174:         for (i = 0; i < height; i++) {
 175:         bcopy(old, new, width);
 176:         old += width;
 177:         new += width + 1;
 178:         }
 179:     } else
 180:         bcopy(data, newdata, size);
 181:     pm->data = newdata;
 182:     }
 183:     return (pm);
 184: }
 185: 
 186: FreePixmap (pixmap)
 187:     register PIXMAP *pixmap;
 188: {
 189:     switch (pixmap->kind) {
 190:     case BitmapPixmap:
 191:     {
 192:         register BITMAP *bm;
 193: 
 194:         bm = PDATA(pixmap);
 195:         if (--bm->refcnt == 0)
 196:         FreeBitmap(bm);
 197:     }
 198:     break;
 199:     case ZColorPixmap:
 200:     case XYColorPixmap:
 201:     free((caddr_t)pixmap->data);
 202:     break;
 203:     case ConstantPixmap:
 204:     return;
 205:     }
 206:     free((caddr_t) pixmap);
 207: }
 208: 
 209: PIXMAP constpix0 = {1, 1, 1, 1, ConstantPixmap, (caddr_t) 0};
 210: PIXMAP constpix1 = {1, 1, 1, 1, ConstantPixmap, (caddr_t) 1};
 211: 
 212: PIXMAP *MakePixmap (xymask, fore, back)
 213:     register BITMAP *xymask;
 214:     int fore, back;
 215: {
 216:     register PIXMAP *pm = NULL;
 217: 
 218:     if (xymask == NULL) {
 219:     if (PixRect->pr_depth == 1) {
 220:         if (fore & 1)
 221:         pm = &constpix1;
 222:         else
 223:         pm = &constpix0;
 224:         pm->refcnt++;
 225:     }
 226:     else if (PixRect->pr_depth <= 8) {
 227:         static PIXMAP *constpm[256];
 228: 
 229:         if (constpm[fore & 0xFF] == 0) {
 230:         constpm[fore & 0xFF] = pm = (PIXMAP *) Xalloc(sizeof(PIXMAP));
 231:         pm->width = 1;
 232:         pm->height = 1;
 233:         pm->refcnt = 1;
 234:         pm->tile = CanBeTiled;
 235:         pm->kind = ConstantPixmap;
 236:         pm->data = (caddr_t) fore;
 237:         }
 238:         else {
 239:         pm = constpm[fore & 0xFF];
 240:         pm->refcnt++;
 241:         }
 242:     }
 243:     return (pm);
 244:     }
 245: 
 246:     pm = (PIXMAP *) Xalloc(sizeof(PIXMAP));
 247:     pm->width = xymask->width;
 248:     pm->height = xymask->height;
 249:     pm->refcnt = 1;
 250:     xymask->refcnt++;
 251:     pm->kind = BitmapPixmap;
 252:     pm->data = (caddr_t) xymask;
 253:     pm->tile = CanBeTiled;
 254:     /* save a bit to indicate if we have to invert the source */
 255: 
 256:     if ((PixRect->pr_depth == 1) && (back & 1))
 257:     pm->kind |= InvertFlag;
 258:     return (pm);
 259: }
 260: 
 261: PIXMAP *PixmapSave (srcx, srcy, width, height)
 262:     int srcx, srcy, width, height;
 263: {
 264:     PIXMAP     *pm = NULL;
 265: 
 266: 
 267:     if (PixRect->pr_depth == 1) {
 268:     register BITMAP *bm;
 269: 
 270:     bm = (BITMAP *) Xalloc(sizeof(BITMAP));
 271:     bm->width = width;
 272:     bm->height = height;
 273:     bm->refcnt = 0;
 274: 
 275:     if ((bm->data =
 276:          (caddr_t) malloc(BitmapSize(width, height))) == NULL) {
 277:         free((caddr_t) bm);
 278:         return (NULL);
 279:     }
 280:     {
 281:         struct pixrect *dest;
 282: 
 283:         dest = mem_point(width, height, 1, bm->data);
 284:         CheckCursor(srcx, srcy, width, height);
 285:         pr_rop(dest, 0, 0, width, height, PIX_SRC | PIX_DONTCLIP, PixRect, srcx, srcy);
 286:         pr_destroy(dest);
 287:         RestoreCursor();
 288:     }
 289:     if ((pm = MakePixmap(bm, 1, 0)) == 0) {
 290:         FreeBitmap(bm);
 291:         return (NULL);
 292:     }
 293:     }
 294:     else if (PixRect->pr_depth <= 8) {
 295:     int sz = BZPixmapSize(width, height);
 296: 
 297:     if (width&1)
 298:         sz += height;
 299:     pm = (PIXMAP *) Xalloc(sizeof(PIXMAP));
 300:     pm->width = width;
 301:     pm->height = height;
 302:     pm->refcnt = 1;
 303:     pm->kind = ZColorPixmap;
 304:     if ((pm->data =
 305:          (caddr_t) malloc(sz)) == NULL) {
 306:         free((caddr_t) pm);
 307:         return (NULL);
 308:     }
 309:     {
 310:         struct pixrect *dest;
 311: 
 312:         dest = mem_point(width, height, PixRect->pr_depth, pm->data);
 313:         CheckCursor(srcx, srcy, width, height);
 314:         pr_rop(dest, 0, 0, width, height, PIX_SRC | PIX_DONTCLIP, PixRect, srcx, srcy);
 315:         pr_destroy(dest);
 316:         RestoreCursor();
 317:     }
 318:     }
 319:     return (pm);
 320: }
 321: 
 322: /*ARGSUSED*/
 323: PixmapGet (srcx, srcy, width, height, client, format, swapit)
 324:     int srcx, srcy, width, height, client, format;
 325: {
 326:     PIXMAP     *pm;
 327:     BITMAP     *bm;
 328:     pm = PixmapSave(srcx, srcy, width, height);
 329:     switch (pm->kind) {
 330:     case BitmapPixmap:{
 331:         int         size = BitmapSize(width, height);
 332: 
 333:         bm = (BITMAP *) pm->data;
 334:         if (swapit)
 335:         Swap_shorts((short *) bm->data, size >> 1);
 336:         InvertPixelOrder((short *) bm->data, size >> 1);
 337:         Write(client, bm->data, size);
 338:         /* Pad amount written to 32-bit boundary - Ahem! */
 339:         if (size%4) {
 340:         Write(client, bm->data, 4 - (size%4));
 341:         }
 342:     }
 343:     break;
 344:     case ZColorPixmap:{
 345:         switch (format) {
 346:         case XYFormat:{
 347:             caddr_t     newdata;
 348:             int size;
 349: 
 350:             size = XYPixmapSize(width, height, PixRect->pr_depth);
 351:             newdata = (caddr_t) malloc(size);
 352:             if (newdata) {
 353:             ZtoXY(width, height, PixRect->pr_depth, pm->data, newdata);
 354:             free(pm->data);
 355:             pm->data = newdata;
 356:             if (swapit)
 357:                 Swap_shorts((short *) pm->data, size >> 1);
 358:             InvertPixelOrder((short *) pm->data, size >> 1);
 359:             }
 360:             Write(client, pm->data, size);
 361:                 /* Pad amount written to 32-bit boundary - Ahem! */
 362:                 if (size%4) {
 363:                 Write(client, pm->data, 4 - (size%4));
 364:                 }
 365:         }
 366:         break;
 367:         case ZFormat: {
 368:         int size = BZPixmapSize(width, height);
 369: 
 370:         if (width&1) {
 371:             register int i;
 372:             register char *old = pm->data;
 373: 
 374:             for (i = 0; i < height; i++) {
 375:             Write(client, old, width);
 376:             old += width + 1;
 377:             }
 378:         } else {
 379:             Write(client, pm->data, size);
 380:         }
 381:             /* Pad amount written to 32-bit boundary - Ahem! */
 382:             if (size%4) {
 383:             Write(client, pm->data, 4 - (size%4));
 384:             }
 385:         }
 386:         break;
 387:     }
 388:     break;
 389:     }
 390:     case XYColorPixmap:
 391:     /*NOTREACHED*/
 392:     break;
 393:     }
 394:     FreePixmap(pm);
 395: }
 396: 
 397: static ZtoXY(w, h, d, old, new)
 398: int w, h, d;
 399: caddr_t old;
 400: u_char *new;
 401: {
 402:     unsigned mask = 1;
 403:     struct pixrect *New, *Old;
 404: 
 405:     Old = mem_point(w, h, d, old);
 406:     while (d--) {
 407:     register int y;
 408: 
 409:     New = mem_point(w, h, 1, new);
 410:     new += BitmapSize(w, h);
 411:     for (y = 0; y < h; y++) {
 412:         register int x;
 413: 
 414:         for (x = 0; x < w; x++) {
 415:         pr_put(New, x, y, (pr_get(Old, x, y) & mask));
 416:         }
 417:     }
 418:     pr_destroy(New);
 419:     mask <<= 1;
 420:     }
 421: }
 422: #endif

Defined functions

CharBitmap defined in line 96; never used
FreeBitmap defined in line 89; used 5 times
FreePixmap defined in line 186; used 1 times
MakePixmap defined in line 212; used 3 times
PixmapGet defined in line 323; never used
PixmapSave defined in line 261; used 1 times
StoreBitmap defined in line 66; used 1 times
StorePixmap defined in line 131; never used
ZtoXY defined in line 397; used 1 times

Defined variables

constpix0 defined in line 209; used 1 times
constpix1 defined in line 210; used 1 times
rcsid_bitpix_c defined in line 2; never used
sccsid defined in line 36; never used
Last modified: 1986-02-01
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