/* 3DKIT version 1.3 High speed 3D graphics and rendering library for Linux. Copyright (C) 1996, 1997 Paul Sheer psheer@icon.co.za This library is free software; you can redistribute it and/or modify it under the terms of the GNU Library General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License for more details. You should have received a copy of the GNU Library General Public License along with this library; if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA */ #include #ifndef DO_NOT_USE_VGALIB #include #endif #include #include "triangle.h" #include #define SHLB 8 #define SHC 0 #ifdef WRAP #define S_MASK 0x01ff00 #endif #ifdef byte #undef byte #endif #define byte unsigned char #ifdef word #undef word #endif #define word unsigned short #ifdef quad_t #undef quad_t #endif #ifdef INT_IS_16_BITS #define quad_t unsigned long #else #define quad_t unsigned int #endif /* this assumes that BYTEWIDTH is not necessarily equal to bytes-per-pixel times WIDTH */ #define assignvpoffset8(x, y, vp) vp = (y) * BYTEWIDTH + (x); #define assignvpoffset16(x, y, vp) vp = (y) * BYTEWIDTH + ((x) << 1); #define assignvpoffset24(x, y, vp) vp = (y) * BYTEWIDTH + (x) * 3; #define assignvpoffset32(x, y, vp) vp = (y) * BYTEWIDTH + ((x) << 2); #define declarevp8 byte *vpbyte = (byte *) VBUF #define declarevp16 word *vpword = (word *) VBUF #define declarevp24 byte *vpbyte = (byte *) VBUF #define declarevp32 quad_t *vpquad = (quad_t *) VBUF #define assignvp8(x, y, vp) vpbyte = (byte *) VBUF + (y) * BYTEWIDTH + (x); #define assignvp16(x, y, vp) vpword = (word *) ((byte *) VBUF + (y) * BYTEWIDTH) + (x); #define assignvp24(x, y, vp) vpbyte = (byte *) VBUF + (y) * BYTEWIDTH + (x) * 3; #define assignvp32(x, y, vp) vpquad = (quad_t *) ((byte *) VBUF + (y) * BYTEWIDTH) + (x); /* here we would like to have a single void pointer and cast it to byte, word or quad_t, but ansi does not allow casts on LHS :( */ #define decvp8 *(--(vpbyte)) = lookup(color) #define incvp8 *((vpbyte)++) = lookup(color) #define decvp16 *(--(vpword)) = lookup(color) #define incvp16 *((vpword)++) = lookup(color) #define decvp24 *(--(vpbyte)) = lookup(color) >> 16; \ *(--(vpbyte)) = lookup(color) >> 8; \ *(--(vpbyte)) = lookup(color); #define incvp24 *((vpbyte)++) = lookup(color); \ *((vpbyte)++) = lookup(color) >> 8; \ *((vpbyte)++) = lookup(color) >> 16; #define decvp32 *(--(vpquad)) = lookup(color) #define incvp32 *((vpquad)++) = lookup(color) #define decvpoffset8 \ if (!offst--) \ vga_setpage (--pg); \ *(vpbyte + offst) = lookup(color); #define incvpoffset8 \ *(vpbyte + offst) = lookup(color); \ if (!(++offst)) \ vga_setpage (++pg); #define decvpoffset16 \ if (!offst) \ vga_setpage (--pg); \ offst -= 2; \ *(vpword + offst) = lookup(color); #define incvpoffset16 \ *(vpword + offst) = lookup(color); \ offst += 2; \ if (!offst) \ vga_setpage (++pg); #define decvpoffset24 \ if (!offst--) \ vga_setpage (--pg); \ *(vpbyte + offst) = lookup(color) >> 16; \ if (!offst--) \ vga_setpage (--pg); \ *(vpbyte + offst) = lookup(color) >> 8; \ if (!offst--) \ vga_setpage (--pg); \ *(vpbyte + offst) = lookup(color); #define incvpoffset24 \ *(vpbyte + offst) = lookup(color); \ if (!(++offst)) \ vga_setpage (++pg); \ *(vpbyte + offst) = lookup(color) >> 8; \ if (!(++offst)) \ vga_setpage (++pg); \ *(vpbyte + offst) = lookup(color) >> 16; \ if (!(++offst)) \ vga_setpage (++pg); #define decvpoffset32 \ if (!offst) \ vga_setpage (--pg); \ offst -= 4; \ *(vpquad + offst) = lookup(color); #define incvpoffset32 \ *(vpquad + offst) = lookup(color); \ offst += 4; \ if (!offst) \ vga_setpage (++pg); static int px1, px2, py; static long c; #ifdef INTERP static long c_x; #endif #ifdef WRAP static long xd, xd_x, yd, yd_x; static unsigned char *dat; #endif static long dx0, dy0; #if defined(WRAP) && defined(INTERP) /* this must only occur once */ long color_lookup[TRIANGLE_COLOR_LOOKUP_TABLE_SIZE]; static long *_color_lookup; void gl_trisetcolorlookup (int i, long c) { if(i < TRIANGLE_COLOR_LOOKUP_TABLE_SIZE) color_lookup[i] = c; } long gl_trigetcolorlookup (int i) { if(i < TRIANGLE_COLOR_LOOKUP_TABLE_SIZE) return color_lookup[i]; return 0; } void (*tri_drawpoint) (int, int, int); static void (*_tri_drawpoint) (int, int, int); void gl_trisetdrawpoint(void (*draw_point) (int, int, int)) { tri_drawpoint = draw_point; } #else extern long color_lookup[TRIANGLE_COLOR_LOOKUP_TABLE_SIZE]; static long *_color_lookup; extern void (*tri_drawpoint) (int, int, int); static void (*_tri_drawpoint) (int, int, int); #endif /* this static is just because static is faster than ordinary array (so I hear) in DLL's */ #define TRI_BPP 8 #include "trisetpixel.c" #undef TRI_BPP #define TRI_BPP 16 #include "trisetpixel.c" #undef TRI_BPP #define TRI_BPP 24 #include "trisetpixel.c" #undef TRI_BPP #define TRI_BPP 32 #include "trisetpixel.c" #undef TRI_BPP /* #define CONTEXT_VIRTUAL 0x0 #define CONTEXT_PAGED 0x1 #define CONTEXT_LINEAR 0x2 #define CONTEXT_MODEX 0x3 #define CONTEXT_PLANAR16 0x4 */ static void (*linefuncs[64]) (void) = { colhline_pos_direct8, colhline_neg_direct8, colhline_pos_paged8, colhline_neg_paged8, /*2 */ colhline_pos_direct8, colhline_neg_direct8, colhline_pos_setpixel8, colhline_neg_setpixel8, /*4 */ colhline_pos_setpixel8, colhline_neg_setpixel8, colhline_pos_setpixel8, colhline_neg_setpixel8, /*6 */ colhline_pos_setpixel8, colhline_neg_setpixel8, colhline_pos_setpixel8, colhline_neg_setpixel8, /*8 */ colhline_pos_direct16, colhline_neg_direct16, colhline_pos_paged16, colhline_neg_paged16, /*2 */ colhline_pos_direct16, colhline_neg_direct16, colhline_pos_setpixel16, colhline_neg_setpixel16, /*4 */ colhline_pos_setpixel16, colhline_neg_setpixel16, colhline_pos_setpixel16, colhline_neg_setpixel16, /*6 */ colhline_pos_setpixel16, colhline_neg_setpixel16, colhline_pos_setpixel16, colhline_neg_setpixel16, /*8 */ colhline_pos_direct24, colhline_neg_direct24, colhline_pos_paged24, colhline_neg_paged24, /*2 */ colhline_pos_direct24, colhline_neg_direct24, colhline_pos_setpixel24, colhline_neg_setpixel24, /*4 */ colhline_pos_setpixel24, colhline_neg_setpixel24, colhline_pos_setpixel24, colhline_neg_setpixel24, /*6 */ colhline_pos_setpixel24, colhline_neg_setpixel24, colhline_pos_setpixel24, colhline_neg_setpixel24, /*8 */ colhline_pos_direct32, colhline_neg_direct32, colhline_pos_paged32, colhline_neg_paged32, /*2 */ colhline_pos_direct32, colhline_neg_direct32, colhline_pos_setpixel32, colhline_neg_setpixel32, /*4 */ colhline_pos_setpixel32, colhline_neg_setpixel32, colhline_pos_setpixel32, colhline_neg_setpixel32, /*6 */ colhline_pos_setpixel32, colhline_neg_setpixel32, colhline_pos_setpixel32, colhline_neg_setpixel32, /*8 */ }; #include "tri.c"