prj/tech/libsrc/g2/fl8lin.c

   1 /*
   2  * $Source: s:/prj/tech/libsrc/g2/RCS/fl8lin.c $
   3  * $Revision: 1.1 $
   4  * $Author: KEVIN $
   5  * $Date: 1996/04/10 17:26:08 $
   6  *
   7  * Routines for drawing fixed-point lines onto a flat 8 canvas.
   8  *
   9  * This file is part of the g2 library.
  10  *
  11  */
  12
  13 #include <dev2d.h>
  14 #include <mathmac.h>
  15 #include <plytyp.h>
  16
  17 /* same for norm, solid and clut */
  18
  19 #undef  flat8_pixel_fill
  20 #define flat8_pixel_fill(_p, _c) \
  21 do { \
  22    *_p = _c; \
  23 } while (0)
  24
  25 void flat8_uline (uchar c, grs_vertex *v0, grs_vertex *v1)
  26 {
  27    #include <fl8lin.h>
  28 }
  29
  30 /* norm */
  31 void flat8_uline_norm (grs_vertex *v0, grs_vertex *v1)
  32 {
  33    flat8_uline(grd_gc.fcolor, v0, v1);
  34 }
  35
  36 /* solid */
  37
  38 void flat8_uline_solid (grs_vertex *v0, grs_vertex *v1)
  39 {
  40    flat8_uline (grd_gc.fill_parm, v0, v1);
  41 }
  42
  43 /* clut */
  44
  45 void flat8_uline_clut (grs_vertex *v0, grs_vertex *v1)
  46 {
  47    uchar c = (uchar )(((uchar *)grd_gc.fill_parm)[grd_gc.fcolor]);
  48    flat8_uline (c, v0, v1);
  49 }
  50
  51 /* xor */
  52
  53 #undef  flat8_pixel_fill
  54 #define flat8_pixel_fill(_p, _c) \
  55 do { \
  56    *_p = _c ^ *_p; \
  57 } while (0)
  58
  59 void flat8_uline_xor (grs_vertex *v0, grs_vertex *v1)
  60 {
  61    uchar c=grd_gc.fcolor;
  62    #include <fl8lin.h>
  63 }
  64
  65 /* blend */
  66
  67 #undef  flat8_pixel_fill
  68 #define flat8_pixel_fill(_p, _c) \
  69 do { \
  70    *_p = clut[*_p]; \
  71 } while (0)
  72
  73 void flat8_uline_blend (grs_vertex *v0, grs_vertex *v1)
  74 {
  75    uchar c = grd_gc.fcolor;
  76    uchar *clut = tluc8tab[c];
  77    if (clut == NULL) {
  78       flat8_uline (c, v0, v1);
  79    } else {
  80       #include <fl8lin.h>
  81    }
  82 }
  83
  84
  85