prj/tech/libsrc/dev2d/bk8fl8.c

   1 /*
   2  * $Source: s:/prj/tech/libsrc/dev2d/RCS/bk8fl8.c $
   3  * $Revision: 1.1 $
   4  * $Author: KEVIN $
   5  * $Date: 1996/04/10 15:48:12 $
   6  *
   7  * Routines for drawing flat8 bitmaps into a flat8 canvas.
   8  *
   9  * This file is part of the dev2d library.
  10  *
  11  */
  12
  13 #include <string.h>
  14 #include <bank.h>
  15
  16 void bank8_flat8_opaque_ubitmap (grs_bitmap *bm, int x, int y)
  17 {
  18    uchar *src;
  19    long p;
  20    int w = bm->w;
  21    int h = bm->h;
  22    int srow = bm->row;
  23    int drow = grd_bm.row;
  24    uchar *base=gd_bank_p(0);
  25    int save_bank = gdd_save_bank;
  26
  27    src = bm->bits;
  28    p = ((long )grd_bm.bits) + drow*y + x;
  29
  30    gd_set_bank(p>>16);
  31
  32    p &= 0xffff;
  33    while (h--) {
  34       int delta;
  35
  36       if (p>=0x10000) {
  37          gd_inc_bank();
  38          p -= 0x10000;
  39       }
  40       delta = 0x10000-p;
  41       if (delta >= w) {
  42          memcpy (base+p, src, w);
  43       } else {
  44          memcpy (base+p, src, delta);
  45          gd_inc_bank();
  46          p -= 0x10000;
  47          memcpy (base, src+delta, w-delta);
  48       }
  49       src += srow;
  50       p += drow;
  51    }
  52    /* synchronize gdd_bank */
  53    gd_restore_bank(save_bank);
  54 }
  55
  56 void bank8_flat8_trans_ubitmap (grs_bitmap *bm, int x, int y)
  57 {
  58    uchar *src;
  59    long p;
  60    int w = bm->w;
  61    int h = bm->h;
  62    int srow = bm->row;
  63    int drow = grd_bm.row;
  64    uchar *base=gd_bank_p(0);
  65    int save_bank = gdd_save_bank;
  66
  67    src = bm->bits;
  68    p = ((long )grd_bm.bits) + drow*y + x;
  69
  70    gd_set_bank(p>>16);
  71
  72    p &= 0xffff;
  73    while (h--) {
  74       int i, delta;
  75
  76       if (p>=0x10000) {
  77          gd_inc_bank();
  78          p -= 0x10000;
  79       }
  80       delta = 0x10000-p;
  81       if (delta >= w) {
  82          for (i=0; i<w; i++) {
  83             uchar c=src[i];
  84             if (c) base[p+i]=c;
  85          }
  86       } else {
  87          for (i=0; i<delta; i++) {
  88             uchar c=src[i];
  89             if (c) base[p+i]=c;
  90          }
  91          gd_inc_bank();
  92          p -= 0x10000;
  93          for (i=delta; i<w; i++) {
  94             uchar c=src[i];
  95             if (c) base[i-delta]=c;
  96          }
  97       }
  98       src += srow;
  99       p += drow;
 100    }
 101    /* synchronize gdd_bank */
 102    gd_restore_bank(save_bank);
 103 }