lib/libvgl/bitmap.c

   1 /*-
   2  * Copyright (c) 1991-1997 Søren Schmidt
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer,
  10  *    in this position and unchanged.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  * 3. The name of the author may not be used to endorse or promote products
  15  *    derived from this software without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  *
  28  * $FreeBSD: src/lib/libvgl/bitmap.c,v 1.4 1999/11/08 11:37:39 yokota Exp $
  29  * $DragonFly: src/lib/libvgl/bitmap.c,v 1.3 2004/06/19 18:55:47 joerg Exp $
  30  */
  31
  32 #include <sys/types.h>
  33 #include <signal.h>
  34 #include <machine/console.h>
  35 #include "vgl.h"
  36
  37 #define min(x, y)       (((x) < (y)) ? (x) : (y))
  38
  39 static byte mask[8] = {0xff, 0x7f, 0x3f, 0x1f, 0x0f, 0x07, 0x03, 0x01};
  40 static int color2bit[16] = {0x00000000, 0x00000001, 0x00000100, 0x00000101,
  41                             0x00010000, 0x00010001, 0x00010100, 0x00010101,
  42                             0x01000000, 0x01000001, 0x01000100, 0x01000101,
  43                             0x01010000, 0x01010001, 0x01010100, 0x01010101};
  44
  45 static void
  46 WriteVerticalLine(VGLBitmap *dst, int x, int y, int width, byte *line)
  47 {
  48   int i, pos, last, planepos, start_offset, end_offset, offset;
  49   int len;
  50   unsigned int word = 0;
  51   byte *address;
  52   byte *VGLPlane[4];
  53
  54   switch (dst->Type) {
  55   case VIDBUF4:
  56   case VIDBUF4S:
  57     start_offset = (x & 0x07);
  58     end_offset = (x + width) & 0x07;
  59     i = (width + start_offset) / 8;
  60     if (end_offset)
  61         i++;
  62     VGLPlane[0] = VGLBuf;
  63     VGLPlane[1] = VGLPlane[0] + i;
  64     VGLPlane[2] = VGLPlane[1] + i;
  65     VGLPlane[3] = VGLPlane[2] + i;
  66     pos = 0;
  67     planepos = 0;
  68     last = 8 - start_offset;
  69     while (pos < width) {
  70       word = 0;
  71       while (pos < last && pos < width)
  72         word = (word<<1) | color2bit[line[pos++]&0x0f];
  73       VGLPlane[0][planepos] = word;
  74       VGLPlane[1][planepos] = word>>8;
  75       VGLPlane[2][planepos] = word>>16;
  76       VGLPlane[3][planepos] = word>>24;
  77       planepos++;
  78       last += 8;
  79     }
  80     planepos--;
  81     if (end_offset) {
  82       word <<= (8 - end_offset);
  83       VGLPlane[0][planepos] = word;
  84       VGLPlane[1][planepos] = word>>8;
  85       VGLPlane[2][planepos] = word>>16;
  86       VGLPlane[3][planepos] = word>>24;
  87     }
  88     if (start_offset || end_offset)
  89       width+=8;
  90     width /= 8;
  91     outb(0x3ce, 0x01); outb(0x3cf, 0x00);               /* set/reset enable */
  92     outb(0x3ce, 0x08); outb(0x3cf, 0xff);               /* bit mask */
  93     for (i=0; i<4; i++) {
  94       outb(0x3c4, 0x02);
  95       outb(0x3c5, 0x01<<i);
  96       outb(0x3ce, 0x04);
  97       outb(0x3cf, i);
  98       pos = VGLAdpInfo.va_line_width*y + x/8;
  99       if (dst->Type == VIDBUF4) {
 100         if (end_offset)
 101           VGLPlane[i][planepos] |= dst->Bitmap[pos+planepos] & mask[end_offset];
 102         if (start_offset)
 103           VGLPlane[i][0] |= dst->Bitmap[pos] & ~mask[start_offset];
 104         bcopy(&VGLPlane[i][0], dst->Bitmap + pos, width);
 105       } else {  /* VIDBUF4S */
 106         if (end_offset) {
 107           offset = VGLSetSegment(pos + planepos);
 108           VGLPlane[i][planepos] |= dst->Bitmap[offset] & mask[end_offset];
 109         }
 110         offset = VGLSetSegment(pos);
 111         if (start_offset)
 112           VGLPlane[i][0] |= dst->Bitmap[offset] & ~mask[start_offset];
 113         for (last = width; ; ) {
 114           len = min(VGLAdpInfo.va_window_size - offset, last);
 115           bcopy(&VGLPlane[i][width - last], dst->Bitmap + offset, len);
 116           pos += len;
 117           last -= len;
 118           if (last <= 0)
 119             break;
 120           offset = VGLSetSegment(pos);
 121         }
 122       }
 123     }
 124     break;
 125   case VIDBUF8X:
 126     address = dst->Bitmap + VGLAdpInfo.va_line_width * y + x/4;
 127     for (i=0; i<4; i++) {
 128       outb(0x3c4, 0x02);
 129       outb(0x3c5, 0x01 << ((x + i)%4));
 130       for (planepos=0, pos=i; pos<width; planepos++, pos+=4)
 131         address[planepos] = line[pos];
 132       if ((x + i)%4 == 3)
 133         ++address;
 134     }
 135     break;
 136   case VIDBUF8S:
 137     pos = dst->VXsize * y + x;
 138     while (width > 0) {
 139       offset = VGLSetSegment(pos);
 140       i = min(VGLAdpInfo.va_window_size - offset, width);
 141       bcopy(line, dst->Bitmap + offset, i);
 142       line += i;
 143       pos += i;
 144       width -= i;
 145     }
 146     break;
 147   case VIDBUF8:
 148   case MEMBUF:
 149     address = dst->Bitmap + dst->VXsize * y + x;
 150     bcopy(line, address, width);
 151     break;
 152
 153   default:
 154     break;
 155   }
 156 }
 157
 158 static void
 159 ReadVerticalLine(VGLBitmap *src, int x, int y, int width, byte *line)
 160 {
 161   int i, bit, pos, count, planepos, start_offset, end_offset, offset;
 162   int width2, len;
 163   byte *address;
 164   byte *VGLPlane[4];
 165
 166   switch (src->Type) {
 167   case VIDBUF4S:
 168     start_offset = (x & 0x07);
 169     end_offset = (x + width) & 0x07;
 170     count = (width + start_offset) / 8;
 171     if (end_offset)
 172       count++;
 173     VGLPlane[0] = VGLBuf;
 174     VGLPlane[1] = VGLPlane[0] + count;
 175     VGLPlane[2] = VGLPlane[1] + count;
 176     VGLPlane[3] = VGLPlane[2] + count;
 177     for (i=0; i<4; i++) {
 178       outb(0x3ce, 0x04);
 179       outb(0x3cf, i);
 180       pos = VGLAdpInfo.va_line_width*y + x/8;
 181       for (width2 = count; width2 > 0; ) {
 182         offset = VGLSetSegment(pos);
 183         len = min(VGLAdpInfo.va_window_size - offset, width2);
 184         bcopy(src->Bitmap + offset, &VGLPlane[i][count - width2], len);
 185         pos += len;
 186         width2 -= len;
 187       }
 188     }
 189     goto read_planar;
 190   case VIDBUF4:
 191     address = src->Bitmap + VGLAdpInfo.va_line_width * y + x/8;
 192     start_offset = (x & 0x07);
 193     end_offset = (x + width) & 0x07;
 194     count = (width + start_offset) / 8;
 195     if (end_offset)
 196       count++;
 197     VGLPlane[0] = VGLBuf;
 198     VGLPlane[1] = VGLPlane[0] + count;
 199     VGLPlane[2] = VGLPlane[1] + count;
 200     VGLPlane[3] = VGLPlane[2] + count;
 201     for (i=0; i<4; i++) {
 202       outb(0x3ce, 0x04);
 203       outb(0x3cf, i);
 204       bcopy(address, &VGLPlane[i][0], count);
 205     }
 206 read_planar:
 207     pos = 0;
 208     planepos = 0;
 209     bit = 7 - start_offset;
 210     while (pos < width) {
 211       for (; bit >= 0 && pos < width; bit--, pos++) {
 212         line[pos] = (VGLPlane[0][planepos] & (1<<bit) ? 1 : 0) |
 213                     ((VGLPlane[1][planepos] & (1<<bit) ? 1 : 0) << 1) |
 214                     ((VGLPlane[2][planepos] & (1<<bit) ? 1 : 0) << 2) |
 215                     ((VGLPlane[3][planepos] & (1<<bit) ? 1 : 0) << 3);
 216       }
 217       planepos++;
 218       bit = 7;
 219     }
 220     break;
 221   case VIDBUF8X:
 222     address = src->Bitmap + VGLAdpInfo.va_line_width * y + x/4;
 223     for (i=0; i<4; i++) {
 224       outb(0x3ce, 0x04);
 225       outb(0x3cf, (x + i)%4);
 226       for (planepos=0, pos=i; pos<width; planepos++, pos+=4)
 227         line[pos] = address[planepos];
 228       if ((x + i)%4 == 3)
 229         ++address;
 230     }
 231     break;
 232   case VIDBUF8S:
 233     pos = src->VXsize * y + x;
 234     while (width > 0) {
 235       offset = VGLSetSegment(pos);
 236       i = min(VGLAdpInfo.va_window_size - offset, width);
 237       bcopy(src->Bitmap + offset, line, i);
 238       line += i;
 239       pos += i;
 240       width -= i;
 241     }
 242     break;
 243   case VIDBUF8:
 244   case MEMBUF:
 245     address = src->Bitmap + src->VXsize * y + x;
 246     bcopy(address, line, width);
 247     break;
 248   default:
 249     break;
 250   }
 251 }
 252
 253 int
 254 __VGLBitmapCopy(VGLBitmap *src, int srcx, int srcy,
 255               VGLBitmap *dst, int dstx, int dsty, int width, int hight)
 256 {
 257   int srcline, dstline;
 258
 259   if (srcx>src->VXsize || srcy>src->VYsize
 260         || dstx>dst->VXsize || dsty>dst->VYsize)
 261     return -1;
 262   if (srcx < 0) {
 263     width=width+srcx; dstx-=srcx; srcx=0;
 264   }
 265   if (srcy < 0) {
 266     hight=hight+srcy; dsty-=srcy; srcy=0;
 267   }
 268   if (dstx < 0) {
 269     width=width+dstx; srcx-=dstx; dstx=0;
 270   }
 271   if (dsty < 0) {
 272     hight=hight+dsty; srcy-=dsty; dsty=0;
 273   }
 274   if (srcx+width > src->VXsize)
 275      width=src->VXsize-srcx;
 276   if (srcy+hight > src->VYsize)
 277      hight=src->VYsize-srcy;
 278   if (dstx+width > dst->VXsize)
 279      width=dst->VXsize-dstx;
 280   if (dsty+hight > dst->VYsize)
 281      hight=dst->VYsize-dsty;
 282   if (width < 0 || hight < 0)
 283      return -1;
 284   if (src->Type == MEMBUF) {
 285     for (srcline=srcy, dstline=dsty; srcline<srcy+hight; srcline++, dstline++) {
 286       WriteVerticalLine(dst, dstx, dstline, width,
 287         (src->Bitmap+(srcline*src->VXsize)+srcx));
 288     }
 289   }
 290   else if (dst->Type == MEMBUF) {
 291     for (srcline=srcy, dstline=dsty; srcline<srcy+hight; srcline++, dstline++) {
 292       ReadVerticalLine(src, srcx, srcline, width,
 293          (dst->Bitmap+(dstline*dst->VXsize)+dstx));
 294     }
 295   }
 296   else {
 297     byte buffer[2048];  /* XXX */
 298     byte *p;
 299
 300     if (width > sizeof(buffer)) {
 301       p = malloc(width);
 302       if (p == NULL)
 303         return 1;
 304     } else {
 305       p = buffer;
 306     }
 307     for (srcline=srcy, dstline=dsty; srcline<srcy+hight; srcline++, dstline++) {
 308       ReadVerticalLine(src, srcx, srcline, width, p);
 309       WriteVerticalLine(dst, dstx, dstline, width, p);
 310     }
 311     if (width > sizeof(buffer))
 312       free(p);
 313   }
 314   return 0;
 315 }
 316
 317 int
 318 VGLBitmapCopy(VGLBitmap *src, int srcx, int srcy,
 319               VGLBitmap *dst, int dstx, int dsty, int width, int hight)
 320 {
 321   int error;
 322
 323   VGLMouseFreeze(dstx, dsty, width, hight, 0);
 324   error = __VGLBitmapCopy(src, srcx, srcy, dst, dstx, dsty, width, hight);
 325   VGLMouseUnFreeze();
 326   return error;
 327 }
 328
 329 VGLBitmap
 330 *VGLBitmapCreate(int type, int xsize, int ysize, byte *bits)
 331 {
 332   VGLBitmap *object;
 333
 334   if (type != MEMBUF)
 335     return NULL;
 336   if (xsize < 0 || ysize < 0)
 337     return NULL;
 338   object = (VGLBitmap *)malloc(sizeof(*object));
 339   if (object == NULL)
 340     return NULL;
 341   object->Type = type;
 342   object->Xsize = xsize;
 343   object->Ysize = ysize;
 344   object->VXsize = xsize;
 345   object->VYsize = ysize;
 346   object->Xorigin = 0;
 347   object->Yorigin = 0;
 348   object->Bitmap = bits;
 349   return object;
 350 }
 351
 352 void
 353 VGLBitmapDestroy(VGLBitmap *object)
 354 {
 355   if (object->Bitmap)
 356     free(object->Bitmap);
 357   free(object);
 358 }
 359
 360 int
 361 VGLBitmapAllocateBits(VGLBitmap *object)
 362 {
 363   object->Bitmap = (byte *)malloc(object->VXsize*object->VYsize);
 364   if (object->Bitmap == NULL)
 365     return -1;
 366   return 0;
 367 }