xorg-server-1.4/mfb/mfbpixmap.c

   1 /***********************************************************
   2
   3 Copyright 1987, 1998  The Open Group
   4
   5 Permission to use, copy, modify, distribute, and sell this software and its
   6 documentation for any purpose is hereby granted without fee, provided that
   7 the above copyright notice appear in all copies and that both that
   8 copyright notice and this permission notice appear in supporting
   9 documentation.
  10
  11 The above copyright notice and this permission notice shall be included in
  12 all copies or substantial portions of the Software.
  13
  14 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
  17 OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  18 AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  19 CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  20
  21 Except as contained in this notice, the name of The Open Group shall not be
  22 used in advertising or otherwise to promote the sale, use or other dealings
  23 in this Software without prior written authorization from The Open Group.
  24
  25
  26 Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts.
  27
  28                         All Rights Reserved
  29
  30 Permission to use, copy, modify, and distribute this software and its
  31 documentation for any purpose and without fee is hereby granted,
  32 provided that the above copyright notice appear in all copies and that
  33 both that copyright notice and this permission notice appear in
  34 supporting documentation, and that the name of Digital not be
  35 used in advertising or publicity pertaining to distribution of the
  36 software without specific, written prior permission.
  37
  38 DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
  39 ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
  40 DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
  41 ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
  42 WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
  43 ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
  44 SOFTWARE.
  45
  46 ******************************************************************/
  47
  48 /* pixmap management
  49    written by drewry, september 1986
  50
  51    on a monchrome device, a pixmap is a bitmap.
  52 */
  53
  54 #ifdef HAVE_DIX_CONFIG_H
  55 #include <dix-config.h>
  56 #endif
  57
  58 #include <string.h>
  59
  60 #include <X11/Xmd.h>
  61 #include "scrnintstr.h"
  62 #include "pixmapstr.h"
  63 #include "maskbits.h"
  64
  65 #include "mfb.h"
  66 #include "mi.h"
  67
  68 #include "servermd.h"
  69
  70
  71 PixmapPtr
  72 mfbCreatePixmap (pScreen, width, height, depth)
  73     ScreenPtr   pScreen;
  74     int         width;
  75     int         height;
  76     int         depth;
  77 {
  78     PixmapPtr pPixmap;
  79     size_t datasize;
  80     size_t paddedWidth;
  81
  82     if (depth != 1)
  83         return NullPixmap;
  84     paddedWidth = BitmapBytePad(width);
  85     if (paddedWidth / 4 > 32767 || height > 32767)
  86         return NullPixmap;
  87     datasize = height * paddedWidth;
  88     pPixmap = AllocatePixmap(pScreen, datasize);
  89     if (!pPixmap)
  90         return NullPixmap;
  91     pPixmap->drawable.type = DRAWABLE_PIXMAP;
  92     pPixmap->drawable.class = 0;
  93     pPixmap->drawable.pScreen = pScreen;
  94     pPixmap->drawable.depth = depth;
  95     pPixmap->drawable.bitsPerPixel = depth;
  96     pPixmap->drawable.id = 0;
  97     pPixmap->drawable.serialNumber = NEXT_SERIAL_NUMBER;
  98     pPixmap->drawable.x = 0;
  99     pPixmap->drawable.y = 0;
 100     pPixmap->drawable.width = width;
 101     pPixmap->drawable.height = height;
 102     pPixmap->devKind = paddedWidth;
 103     pPixmap->refcnt = 1;
 104     pPixmap->devPrivate.ptr =  datasize ?
 105                 (pointer)((char *)pPixmap + pScreen->totalPixmapSize) : NULL;
 106     return pPixmap;
 107 }
 108
 109
 110 Bool
 111 mfbDestroyPixmap(pPixmap)
 112     PixmapPtr pPixmap;
 113 {
 114     if(--pPixmap->refcnt)
 115         return TRUE;
 116     xfree(pPixmap);
 117     return TRUE;
 118 }
 119
 120
 121 PixmapPtr
 122 mfbCopyPixmap(pSrc)
 123     register PixmapPtr  pSrc;
 124 {
 125     register PixmapPtr  pDst;
 126     int         size;
 127     ScreenPtr pScreen;
 128
 129     size = pSrc->drawable.height * pSrc->devKind;
 130     pScreen = pSrc->drawable.pScreen;
 131     pDst = (*pScreen->CreatePixmap) (pScreen, pSrc->drawable.width,
 132                                 pSrc->drawable.height, pSrc->drawable.depth);
 133     if (!pDst)
 134         return NullPixmap;
 135     memmove((char *)pDst->devPrivate.ptr, (char *)pSrc->devPrivate.ptr, size);
 136     return pDst;
 137 }
 138
 139
 140 /* replicates a pattern to be a full 32 bits wide.
 141    relies on the fact that each scnaline is longword padded.
 142    doesn't do anything if pixmap is not a factor of 32 wide.
 143    changes width field of pixmap if successful, so that the fast
 144         XRotatePixmap code gets used if we rotate the pixmap later.
 145
 146    calculate number of times to repeat
 147    for each scanline of pattern
 148       zero out area to be filled with replicate
 149       left shift and or in original as many times as needed
 150 */
 151 void
 152 mfbPadPixmap(pPixmap)
 153     PixmapPtr pPixmap;
 154 {
 155     register int width = pPixmap->drawable.width;
 156     register int h;
 157     register PixelType mask;
 158     register PixelType *p;
 159     register PixelType bits;    /* real pattern bits */
 160     register int i;
 161     int rep;                    /* repeat count for pattern */
 162
 163     if (width >= PPW)
 164         return;
 165
 166     rep = PPW/width;
 167     if (rep*width != PPW)
 168         return;
 169
 170     mask = endtab[width];
 171
 172     p = (PixelType *)(pPixmap->devPrivate.ptr);
 173     for (h=0; h < pPixmap->drawable.height; h++)
 174     {
 175         *p &= mask;
 176         bits = *p;
 177         for(i=1; i<rep; i++)
 178         {
 179             bits = SCRRIGHT(bits, width);
 180             *p |= bits;
 181         }
 182         p++;
 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 mfbXRotatePixmap(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     {
 208         pwFinal = pw + pPix->drawable.height;
 209         while(pw < pwFinal)
 210         {
 211             t = *pw;
 212             *pw++ = SCRRIGHT(t, rw) |
 213                     (SCRLEFT(t, (PPW-rw)) & endtab[rw]);
 214         }
 215     }
 216     else
 217     {
 218         /* We no longer do this.  Validate doesn't try to rotate odd-size
 219          * tiles or stipples.  mfbUnnatural<tile/stipple>FS works directly off
 220          * the unrotate tile/stipple in the GC
 221          */
 222         ErrorF("X internal error: trying to rotate odd-sized pixmap.\n");
 223     }
 224
 225 }
 226
 227 /* Rotates pixmap pPix by h lines.  Assumes that h is always less than
 228    pPix->height
 229    works on any width.
 230  */
 231 void
 232 mfbYRotatePixmap(pPix, rh)
 233     register PixmapPtr  pPix;
 234     int rh;
 235 {
 236     int nbyDown;        /* bytes to move down to row 0; also offset of
 237                            row rh */
 238     int nbyUp;          /* bytes to move up to line rh; also
 239                            offset of first line moved down to 0 */
 240     char *pbase;
 241     char *ptmp;
 242     int height;
 243
 244     if (pPix == NullPixmap)
 245         return;
 246     height = (int) pPix->drawable.height;
 247     rh %= height;
 248     if (rh < 0)
 249         rh += height;
 250
 251     pbase = (char *)pPix->devPrivate.ptr;
 252
 253     nbyDown = rh * pPix->devKind;
 254     nbyUp = (pPix->devKind * height) - nbyDown;
 255     if(!(ptmp = (char *)ALLOCATE_LOCAL(nbyUp)))
 256         return;
 257
 258     memmove(ptmp, pbase, nbyUp);                /* save the low rows */
 259     memmove(pbase, pbase+nbyUp, nbyDown);       /* slide the top rows down */
 260     memmove(pbase+nbyDown, ptmp, nbyUp);        /* move lower rows up to row rh */
 261     DEALLOCATE_LOCAL(ptmp);
 262 }
 263
 264 void
 265 mfbCopyRotatePixmap(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     {
 275         memmove((char *)pdstPix->devPrivate.ptr,
 276                 (char *)psrcPix->devPrivate.ptr,
 277               psrcPix->drawable.height * psrcPix->devKind);
 278         pdstPix->drawable.width = psrcPix->drawable.width;
 279         pdstPix->drawable.serialNumber = NEXT_SERIAL_NUMBER;
 280     }
 281     else
 282     {
 283         if (pdstPix)
 284             /* FIX XBUG 6168 */
 285             (*pdstPix->drawable.pScreen->DestroyPixmap)(pdstPix);
 286         *ppdstPix = pdstPix = mfbCopyPixmap(psrcPix);
 287         if (!pdstPix)
 288             return;
 289     }
 290     mfbPadPixmap(pdstPix);
 291     if (xrot)
 292         mfbXRotatePixmap(pdstPix, xrot);
 293     if (yrot)
 294         mfbYRotatePixmap(pdstPix, yrot);
 295 }