463 lines
8.7 KiB
C
463 lines
8.7 KiB
C
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/*
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3DKIT version 1.3
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High speed 3D graphics and rendering library for Linux.
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Copyright (C) 1996, 1997 Paul Sheer psheer@icon.co.za
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with this library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
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MA 02111-1307, USA
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*/
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#ifdef lookup
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#undef lookup
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#endif
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#if (TRI_BPP==8) || !defined(INTERP)
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#define lookup(x) x
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#else
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#define lookup(x) _color_lookup[x]
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#endif
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#ifdef assignvp
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#undef declarevp
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#undef assignvp
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#undef assignvpoffset
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#undef incvp
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#undef incvpoffset
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#undef decvp
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#undef decvpoffset
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#endif
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#if TRI_BPP==8
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#define declarevp declarevp8
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#define assignvp assignvp8
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#define assignvpoffset assignvpoffset8
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#define incvp incvp8
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#define incvpoffset incvpoffset8
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#define decvp decvp8
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#define decvpoffset decvpoffset8
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#endif
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#if TRI_BPP==16
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#define declarevp declarevp16
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#define assignvp assignvp16
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#define assignvpoffset assignvpoffset16
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#define incvp incvp16
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#define incvpoffset incvpoffset16
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#define decvp decvp16
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#define decvpoffset decvpoffset16
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#endif
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#if TRI_BPP==24
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#define declarevp declarevp24
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#define assignvp assignvp24
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#define assignvpoffset assignvpoffset24
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#define incvp incvp24
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#define incvpoffset incvpoffset24
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#define decvp decvp24
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#define decvpoffset decvpoffset24
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#endif
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#if TRI_BPP==32
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#define declarevp declarevp32
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#define assignvp assignvp32
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#define assignvpoffset assignvpoffset32
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#define incvp incvp32
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#define incvpoffset incvpoffset32
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#define decvp decvp32
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#define decvpoffset decvpoffset32
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#endif
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#ifdef color
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#undef color
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#endif
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#ifdef WRAP
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#ifdef INTERP
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#define color \
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(dat[(xd >> SHLB) + (yd & S_MASK)] + (c >> (SHLB + SHC)))
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#else
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#define color \
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(dat[(xd >> SHLB) + (yd & S_MASK)] + c)
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#endif
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#else
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#ifdef INTERP
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#define color \
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(c >> (SHLB + SHC))
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#else
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#define color \
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c
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#endif
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#endif
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/* these are actually all the same except for 8 */
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#if TRI_BPP==8
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static void colhline_neg_setpixel8 (void)
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#endif
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#if TRI_BPP==16
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static void colhline_neg_setpixel16 (void)
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#endif
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#if TRI_BPP==24
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static void colhline_neg_setpixel24 (void)
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#endif
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#if TRI_BPP==32
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static void colhline_neg_setpixel32 (void)
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#endif
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{
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int count, y = py + dy0, x1 = px1 + dx0, x2 = px2 + dx0;
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if (__clip) {
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if (y < __clipy1 || y > __clipy2)
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return;
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if (x1 > __clipx2 + 1) {
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#ifdef WRAP
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xd -= (x1 - __clipx2 - 1) * xd_x;
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yd -= (x1 - __clipx2 - 1) * yd_x;
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#endif
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#ifdef INTERP
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c -= (x1 - __clipx2 - 1) * c_x;
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#endif
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x1 = __clipx2 + 1;
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}
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if (x2 < __clipx1) {
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x2 = __clipx1;
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}
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}
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count = x1 - x2;
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if (count > 0) {
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do {
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_tri_drawpoint (--x1, y, lookup(color));
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#ifdef WRAP
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yd -= yd_x;
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xd -= xd_x;
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#endif
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#ifdef INTERP
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c -= c_x;
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#endif
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} while (--count);
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}
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}
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#if TRI_BPP==8
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static void colhline_pos_setpixel8 (void)
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#endif
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#if TRI_BPP==16
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static void colhline_pos_setpixel16 (void)
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#endif
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#if TRI_BPP==24
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static void colhline_pos_setpixel24 (void)
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#endif
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#if TRI_BPP==32
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static void colhline_pos_setpixel32 (void)
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#endif
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{
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int count, y = py + dy0, x1 = px1 + dx0, x2 = px2 + dx0;
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if (__clip) {
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if (y < __clipy1 || y > __clipy2)
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return;
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if (x1 < __clipx1) {
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#ifdef WRAP
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xd += (__clipx1 - x1) * xd_x;
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yd += (__clipx1 - x1) * yd_x;
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#endif
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#ifdef INTERP
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c += (__clipx1 - x1) * c_x;
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#endif
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x1 = __clipx1;
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}
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if (x2 > __clipx2 + 1) {
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x2 = __clipx2 + 1;
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}
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}
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count = x2 - x1;
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if (count > 0) {
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do {
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_tri_drawpoint (x1++, y, lookup(color));
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#ifdef WRAP
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yd += yd_x;
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xd += xd_x;
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#endif
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#ifdef INTERP
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c += c_x;
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#endif
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} while (--count);
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}
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}
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#ifndef DO_NOT_USE_VGALIB
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/*draw to 64k vga buffer setting vga page appropriately: */
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#if TRI_BPP==8
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static void colhline_neg_paged8 (void)
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#endif
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#if TRI_BPP==16
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static void colhline_neg_paged16 (void)
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#endif
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#if TRI_BPP==24
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static void colhline_neg_paged24 (void)
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#endif
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#if TRI_BPP==32
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static void colhline_neg_paged32 (void)
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#endif
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{
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int count, y = py + dy0, x1 = px1 + dx0, x2 = px2 + dx0;
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unsigned short offst;
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int pg;
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declarevp;
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int vp = 0;
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if (__clip) {
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if (y < __clipy1 || y > __clipy2)
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return;
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if (x1 > __clipx2 + 1) {
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#ifdef WRAP
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xd -= (x1 - __clipx2 - 1) * xd_x;
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yd -= (x1 - __clipx2 - 1) * yd_x;
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#endif
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#ifdef INTERP
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c -= (x1 - __clipx2 - 1) * c_x;
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#endif
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x1 = __clipx2 + 1;
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}
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if (x2 < __clipx1) {
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x2 = __clipx1;
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}
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}
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count = x1 - x2;
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assignvpoffset (x1, y, vp);
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pg = vp >> 16;
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vga_setpage (pg);
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offst = vp;
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if (count > 0) {
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do {
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decvpoffset;
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#ifdef WRAP
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yd -= yd_x;
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xd -= xd_x;
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#endif
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#ifdef INTERP
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c -= c_x;
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#endif
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} while (--count);
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}
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}
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#if TRI_BPP==8
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static void colhline_pos_paged8 (void)
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#endif
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#if TRI_BPP==16
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static void colhline_pos_paged16 (void)
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#endif
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#if TRI_BPP==24
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static void colhline_pos_paged24 (void)
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#endif
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#if TRI_BPP==32
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static void colhline_pos_paged32 (void)
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#endif
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{
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int count, y = py + dy0, x1 = px1 + dx0, x2 = px2 + dx0;
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unsigned short offst;
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int pg;
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declarevp;
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int vp = 0;
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if (__clip) {
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if (y < __clipy1 || y > __clipy2)
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return;
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if (x1 < __clipx1) {
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#ifdef WRAP
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xd += (__clipx1 - x1) * xd_x;
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yd += (__clipx1 - x1) * yd_x;
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#endif
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#ifdef INTERP
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c += (__clipx1 - x1) * c_x;
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#endif
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x1 = __clipx1;
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}
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if (x2 > __clipx2 + 1) {
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x2 = __clipx2 + 1;
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}
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}
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count = x2 - x1;
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assignvpoffset (x1, y, vp);
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pg = vp >> 16;
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vga_setpage (pg);
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offst = vp;
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if (count > 0) {
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do {
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incvpoffset;
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#ifdef WRAP
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yd += yd_x;
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xd += xd_x;
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#endif
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#ifdef INTERP
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c += c_x;
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#endif
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} while (--count);
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}
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}
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#else
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/*draw to 64k vga buffer setting vga page appropriately: */
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#if TRI_BPP==8
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static void colhline_neg_paged8 (void)
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#endif
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#if TRI_BPP==16
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static void colhline_neg_paged16 (void)
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#endif
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#if TRI_BPP==24
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static void colhline_neg_paged24 (void)
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#endif
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#if TRI_BPP==32
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static void colhline_neg_paged32 (void)
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#endif
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{
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}
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#if TRI_BPP==8
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static void colhline_pos_paged8 (void)
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#endif
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#if TRI_BPP==16
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static void colhline_pos_paged16 (void)
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#endif
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#if TRI_BPP==24
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static void colhline_pos_paged24 (void)
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#endif
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#if TRI_BPP==32
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static void colhline_pos_paged32 (void)
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#endif
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{
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}
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#endif
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/*draw to a linear address space (320x200 or virtual screen): */
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#if TRI_BPP==8
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static void colhline_neg_direct8 (void)
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#endif
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#if TRI_BPP==16
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static void colhline_neg_direct16 (void)
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#endif
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#if TRI_BPP==24
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static void colhline_neg_direct24 (void)
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#endif
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#if TRI_BPP==32
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static void colhline_neg_direct32 (void)
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#endif
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{
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int count, y = py + dy0, x1 = px1 + dx0, x2 = px2 + dx0;
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declarevp;
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if (__clip) {
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if (y < __clipy1 || y > __clipy2)
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return;
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if (x1 > __clipx2 + 1) {
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#ifdef WRAP
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xd -= (x1 - __clipx2 - 1) * xd_x;
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yd -= (x1 - __clipx2 - 1) * yd_x;
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#endif
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#ifdef INTERP
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c -= (x1 - __clipx2 - 1) * c_x;
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#endif
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x1 = __clipx2 + 1;
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}
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if (x2 < __clipx1)
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x2 = __clipx1;
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}
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count = x1 - x2;
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assignvp (x1, y, vp);
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if (count > 0) {
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do {
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decvp;
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#ifdef WRAP
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yd -= yd_x;
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xd -= xd_x;
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#endif
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#ifdef INTERP
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c -= c_x;
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#endif
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} while (--count);
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}
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}
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||
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||
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#if TRI_BPP==8
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static void colhline_pos_direct8 (void)
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#endif
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#if TRI_BPP==16
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static void colhline_pos_direct16 (void)
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#endif
|
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#if TRI_BPP==24
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static void colhline_pos_direct24 (void)
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#endif
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#if TRI_BPP==32
|
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|
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static void colhline_pos_direct32 (void)
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#endif
|
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{
|
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int count, y = py + dy0, x1 = px1 + dx0, x2 = px2 + dx0;
|
||
|
|
declarevp;
|
||
|
|
if (__clip) {
|
||
|
|
if (y < __clipy1 || y > __clipy2)
|
||
|
|
return;
|
||
|
|
if (x1 < __clipx1) {
|
||
|
|
#ifdef WRAP
|
||
|
|
xd += (__clipx1 - x1) * xd_x;
|
||
|
|
yd += (__clipx1 - x1) * yd_x;
|
||
|
|
#endif
|
||
|
|
#ifdef INTERP
|
||
|
|
c += (__clipx1 - x1) * c_x;
|
||
|
|
#endif
|
||
|
|
x1 = __clipx1;
|
||
|
|
}
|
||
|
|
if (x2 > __clipx2 + 1)
|
||
|
|
x2 = __clipx2 + 1;
|
||
|
|
}
|
||
|
|
count = x2 - x1;
|
||
|
|
assignvp (x1, y, vp);
|
||
|
|
if (count > 0) {
|
||
|
|
do {
|
||
|
|
incvp;
|
||
|
|
#ifdef WRAP
|
||
|
|
yd += yd_x;
|
||
|
|
xd += xd_x;
|
||
|
|
#endif
|
||
|
|
#ifdef INTERP
|
||
|
|
c += c_x;
|
||
|
|
#endif
|
||
|
|
} while (--count);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/*The following have not yet been implemented */
|
||
|
|
|
||
|
|
/* Draws to planar 256 (these could be complicated) */
|
||
|
|
/*static void colhline_neg_planar (void);
|
||
|
|
static void colhline_pos_planar (void);*/
|
||
|
|
|
||
|
|
/* Draws using accelerated */
|
||
|
|
/*static void colhline_neg_accel (void);
|
||
|
|
static void colhline_pos_accel (void);*/
|
||
|
|
|
||
|
|
|