prj/tech/libsrc/dev2d/f16pix16.c

   1 /*
   2  * $Source: s:/prj/tech/libsrc/dev2d/RCS/f16pix16.c $
   3  * $Revision: 1.1 $
   4  * $Author: KEVIN $
   5  * $Date: 1996/04/10 15:44:38 $
   6  *
   7  * Routines for drawing pixels into a flat 8 canvas.
   8  *
   9  * This file is part of the dev2d library.
  10  *
  11  * $Log: f16pix16.c $
  12  * Revision 1.1  1996/04/10  15:44:38  KEVIN
  13  * Initial revision
  14  *
  15  */
  16
  17 #include <grd.h>
  18
  19 /* draws an unclipped pixel of the given color at (x, y) on the canvas. */
  20 void flat16_norm_upix16(int c16, int x, int y)
  21 {
  22    ushort *p;
  23
  24    p = (ushort *)(grd_bm.bits + grd_bm.row*y + 2*x);
  25    *p = c16;
  26 }
  27
  28 void flat16_clut_upix16 (int c16, int x, int y)
  29 {
  30    ushort *p;
  31    ushort *clut16;
  32
  33    p = (ushort *)(grd_bm.bits + grd_bm.row*y + 2*x);
  34    clut16 = (ushort *)(grd_gc.fill_parm);
  35    *p = clut16[c16&255] + clut16[256+(c16>>8)];
  36 }
  37
  38 void flat16_xor_upix16 (int c16, int x, int y)
  39 {
  40    ushort *p;
  41
  42    p = (ushort *)(grd_bm.bits + grd_bm.row*y + 2*x);
  43    *p = c16 ^ *p;
  44 }
  45
  46 void flat16_tluc_upix16 (int c16, int x, int y)
  47 {
  48    ushort *p;
  49    ushort *clut16;
  50
  51    p = (ushort *)(grd_bm.bits + grd_bm.row*y + 2*x);
  52    if (((uint )c16) <= 255) {
  53       clut16=(ushort *)(tluc8tab[c16]);
  54       if (clut16!=NULL) {
  55          c16 = *p;
  56          *p = clut16[c16&255]+clut16[256+(c16>>8)];
  57          return;
  58       }
  59    }
  60    *p = c16;
  61 }
  62
  63 #pragma off (unreferenced)
  64 void flat16_solid_upix16 (int c16, int x, int y)
  65 {
  66    ushort *p;
  67
  68    p = (ushort *)(grd_bm.bits + grd_bm.row*y + 2*x);
  69    *p = (ushort )grd_gc.fill_parm;
  70 }
  71 #pragma on (unreferenced)