xorg-server-1.4/afb/afbpixmap.c

   1 /***********************************************************
   2
   3 Copyright (c) 1987  X Consortium
   4
   5 Permission is hereby granted, free of charge, to any person obtaining a copy
   6 of this software and associated documentation files (the "Software"), to deal
   7 in the Software without restriction, including without limitation the rights
   8 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   9 copies of the Software, and to permit persons to whom the Software is
  10 furnished to do so, subject to the following conditions:
  11
  12 The above copyright notice and this permission notice shall be included in
  13 all copies or substantial portions of the Software.
  14
  15 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
  18 X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  19 AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  20 CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  21
  22 Except as contained in this notice, the name of the X Consortium shall not be
  23 used in advertising or otherwise to promote the sale, use or other dealings
  24 in this Software without prior written authorization from the X Consortium.
  25
  26
  27 Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts.
  28
  29                         All Rights Reserved
  30
  31 Permission to use, copy, modify, and distribute this software and its
  32 documentation for any purpose and without fee is hereby granted,
  33 provided that the above copyright notice appear in all copies and that
  34 both that copyright notice and this permission notice appear in
  35 supporting documentation, and that the name of Digital not be
  36 used in advertising or publicity pertaining to distribution of the
  37 software without specific, written prior permission.
  38
  39 DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
  40 ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
  41 DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
  42 ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
  43 WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
  44 ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
  45 SOFTWARE.
  46
  47 ******************************************************************/
  48
  49 /* pixmap management
  50    written by drewry, september 1986
  51
  52    on a monchrome device, a pixmap is a bitmap.
  53 */
  54
  55 #ifdef HAVE_DIX_CONFIG_H
  56 #include <dix-config.h>
  57 #endif
  58
  59 #include <string.h>
  60
  61 #include <X11/Xmd.h>
  62 #include "scrnintstr.h"
  63 #include "pixmapstr.h"
  64 #include "maskbits.h"
  65
  66 #include "afb.h"
  67 #include "mi.h"
  68
  69 #include "servermd.h"
  70 #include "mfb.h"
  71
  72 PixmapPtr
  73 afbCreatePixmap(pScreen, width, height, depth)
  74         ScreenPtr               pScreen;
  75         int                             width;
  76         int                             height;
  77         int                             depth;
  78 {
  79         PixmapPtr pPixmap;
  80         size_t datasize;
  81         size_t paddedWidth;
  82
  83         paddedWidth = BitmapBytePad(width);
  84
  85         if (paddedWidth > 32767 || height > 32767 || depth > 4)
  86             return NullPixmap;
  87
  88         datasize = height * paddedWidth * depth;
  89         pPixmap = AllocatePixmap(pScreen, datasize);
  90         if (!pPixmap)
  91                 return(NullPixmap);
  92         pPixmap->drawable.type = DRAWABLE_PIXMAP;
  93         pPixmap->drawable.class = 0;
  94         pPixmap->drawable.pScreen = pScreen;
  95         pPixmap->drawable.depth = depth;
  96         pPixmap->drawable.bitsPerPixel = depth;
  97         pPixmap->drawable.id = 0;
  98         pPixmap->drawable.serialNumber = NEXT_SERIAL_NUMBER;
  99         pPixmap->drawable.x = 0;
 100         pPixmap->drawable.y = 0;
 101         pPixmap->drawable.width = width;
 102         pPixmap->drawable.height = height;
 103         pPixmap->devKind = paddedWidth;
 104         pPixmap->refcnt = 1;
 105         pPixmap->devPrivate.ptr =  datasize ?
 106                                 (pointer)((char *)pPixmap + pScreen->totalPixmapSize) : NULL;
 107         return(pPixmap);
 108 }
 109
 110 Bool
 111 afbDestroyPixmap(pPixmap)
 112         PixmapPtr pPixmap;
 113 {
 114         if(--pPixmap->refcnt)
 115                 return(TRUE);
 116         xfree(pPixmap);
 117         return(TRUE);
 118 }
 119
 120
 121 static PixmapPtr
 122 afbCopyPixmap(PixmapPtr pSrc)
 123 {
 124         register PixmapPtr pDst;
 125         int size;
 126         ScreenPtr pScreen;
 127
 128         size = pSrc->drawable.height * pSrc->devKind * pSrc->drawable.depth;
 129         pScreen = pSrc->drawable.pScreen;
 130         pDst = (*pScreen->CreatePixmap)(pScreen, pSrc->drawable.width,
 131                                                                                           pSrc->drawable.height, pSrc->drawable.depth);
 132         if (!pDst)
 133                 return(NullPixmap);
 134         memmove((char *)pDst->devPrivate.ptr, (char *)pSrc->devPrivate.ptr, size);
 135         return(pDst);
 136 }
 137
 138
 139 /* replicates a pattern to be a full 32 bits wide.
 140    relies on the fact that each scnaline is longword padded.
 141    doesn't do anything if pixmap is not a factor of 32 wide.
 142    changes width field of pixmap if successful, so that the fast
 143                 XRotatePixmap code gets used if we rotate the pixmap later.
 144
 145    calculate number of times to repeat
 146    for each scanline of pattern
 147           zero out area to be filled with replicate
 148           left shift and or in original as many times as needed
 149 */
 150 static void
 151 afbPadPixmap(PixmapPtr pPixmap)
 152 {
 153         register int width = pPixmap->drawable.width;
 154         register int h;
 155         register PixelType mask;
 156         register PixelType *p;
 157         register PixelType bits;                /* real pattern bits */
 158         register int i;
 159         int d;
 160         int rep;                                                /* repeat count for pattern */
 161
 162         if (width >= PPW)
 163                 return;
 164
 165         rep = PPW/width;
 166         if (rep*width != PPW)
 167                 return;
 168
 169         mask = mfbGetendtab(width);
 170
 171         p = (PixelType *)(pPixmap->devPrivate.ptr);
 172
 173         for (d = 0; d < pPixmap->drawable.depth; d++) {
 174                 for (h = 0; h < pPixmap->drawable.height; h++) {
 175                         *p &= mask;
 176                         bits = *p;
 177                         for(i = 1; i < rep; i++) {
 178                                 bits = SCRRIGHT(bits, width);
 179                                 *p |= bits;
 180                         }
 181                         p++;    /* @@@ NEXT PLANE @@@ */
 182                 }
 183         }
 184         pPixmap->drawable.width = PPW;
 185 }
 186
 187 /* Rotates pixmap pPix by w pixels to the right on the screen. Assumes that
 188  * words are PPW bits wide, and that the least significant bit appears on the
 189  * left.
 190  */
 191 void
 192 afbXRotatePixmap(pPix, rw)
 193         PixmapPtr               pPix;
 194         register int rw;
 195 {
 196         register PixelType              *pw, *pwFinal;
 197         register PixelType              t;
 198
 199         if (pPix == NullPixmap)
 200                 return;
 201
 202         pw = (PixelType *)pPix->devPrivate.ptr;
 203         rw %= (int)pPix->drawable.width;
 204         if (rw < 0)
 205                 rw += (int)pPix->drawable.width;
 206         if(pPix->drawable.width == PPW) {
 207                 pwFinal = pw + pPix->drawable.height * pPix->drawable.depth;
 208                 while(pw < pwFinal) {
 209                         t = *pw;
 210                         *pw++ = SCRRIGHT(t, rw) |
 211                                 (SCRLEFT(t, (PPW-rw)) & mfbGetendtab(rw));
 212                 }
 213         } else {
 214                 /* We no longer do this.  Validate doesn't try to rotate odd-size
 215                  * tiles or stipples.  afbUnnatural<tile/stipple>FS works directly off
 216                  * the unrotate tile/stipple in the GC
 217                  */
 218                 ErrorF("X internal error: trying to rotate odd-sized pixmap.\n");
 219         }
 220
 221 }
 222
 223 /* Rotates pixmap pPix by h lines.  Assumes that h is always less than
 224    pPix->height
 225    works on any width.
 226  */
 227 void
 228 afbYRotatePixmap(pPix, rh)
 229         register PixmapPtr              pPix;
 230         int             rh;
 231 {
 232         int nbyDown;            /* bytes to move down to row 0; also offset of
 233                                                                 row rh */
 234         int nbyUp;                      /* bytes to move up to line rh; also
 235                                                                 offset of first line moved down to 0 */
 236         char *pbase;
 237         char *ptmp;
 238         int height;
 239         int d;
 240
 241         if (pPix == NullPixmap)
 242                 return;
 243         height = (int) pPix->drawable.height;
 244         rh %= height;
 245         if (rh < 0)
 246                 rh += height;
 247
 248         nbyDown = rh * pPix->devKind;
 249         nbyUp = (pPix->devKind * height) - nbyDown;
 250
 251         if(!(ptmp = (char *)ALLOCATE_LOCAL(nbyUp)))
 252                 return;
 253
 254         for (d = 0; d < pPix->drawable.depth; d++) {
 255                 pbase = (char *)pPix->devPrivate.ptr + pPix->devKind * height * d;      /* @@@ NEXT PLANE @@@ */
 256
 257                 memmove(ptmp, pbase, nbyUp);                                    /* save the low rows */
 258                 memmove(pbase, pbase+nbyUp, nbyDown);           /* slide the top rows down */
 259                 memmove(pbase+nbyDown, ptmp, nbyUp);            /* move lower rows up to row rh */
 260         }
 261         DEALLOCATE_LOCAL(ptmp);
 262 }
 263
 264 void
 265 afbCopyRotatePixmap(psrcPix, ppdstPix, xrot, yrot)
 266         register PixmapPtr psrcPix, *ppdstPix;
 267         int             xrot, yrot;
 268 {
 269         register PixmapPtr pdstPix;
 270
 271         if ((pdstPix = *ppdstPix) &&
 272                 (pdstPix->devKind == psrcPix->devKind) &&
 273                 (pdstPix->drawable.height == psrcPix->drawable.height) &&
 274                 (pdstPix->drawable.depth == psrcPix->drawable.depth)) {
 275                 memmove((char *)pdstPix->devPrivate.ptr,
 276                                 (char *)psrcPix->devPrivate.ptr,
 277                                 psrcPix->drawable.height * psrcPix->devKind *
 278                                 psrcPix->drawable.depth);
 279                 pdstPix->drawable.width = psrcPix->drawable.width;
 280                 pdstPix->drawable.serialNumber = NEXT_SERIAL_NUMBER;
 281         } else {
 282                 if (pdstPix)
 283                         /* FIX XBUG 6168 */
 284                         (*pdstPix->drawable.pScreen->DestroyPixmap)(pdstPix);
 285                 *ppdstPix = pdstPix = afbCopyPixmap(psrcPix);
 286                 if (!pdstPix)
 287                         return;
 288         }
 289         afbPadPixmap(pdstPix);
 290         if (xrot)
 291                 afbXRotatePixmap(pdstPix, xrot);
 292         if (yrot)
 293                 afbYRotatePixmap(pdstPix, yrot);
 294 }