mirror of
https://github.com/DrBeef/Raze.git
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298 lines
7.6 KiB
C
298 lines
7.6 KiB
C
// A.ASM replacement using C
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// Mainly by Ken Silverman, with things melded with my port by
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// Jonathon Fowler (jonof@edgenetwork.org)
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//
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// "Build Engine & Tools" Copyright (c) 1993-1997 Ken Silverman
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// Ken Silverman's official web site: "http://www.advsys.net/ken"
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// See the included license file "BUILDLIC.TXT" for license info.
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#include "a.h"
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#ifdef ENGINE_USING_A_C
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int32_t krecip(int32_t num); // from engine.c
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#define BITSOFPRECISION 3
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#define BITSOFPRECISIONPOW 8
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extern intptr_t asm1, asm2, asm3, asm4;
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extern int32_t fpuasm, globalx3, globaly3;
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extern void *reciptable;
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static int32_t bpl, transmode = 0;
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static int32_t glogx, glogy, gbxinc, gbyinc, gpinc;
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static char *gbuf, *gpal, *ghlinepal, *gtrans;
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//Global variable functions
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void setvlinebpl(int32_t dabpl) { bpl = dabpl; }
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void fixtransluscence(intptr_t datransoff) { gtrans = (char *)datransoff; }
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void settransnormal(void) { transmode = 0; }
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void settransreverse(void) { transmode = 1; }
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//Ceiling/floor horizontal line functions
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void sethlinesizes(int32_t logx, int32_t logy, intptr_t bufplc)
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{ glogx = logx; glogy = logy; gbuf = (char *)bufplc; }
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void setpalookupaddress(char *paladdr) { ghlinepal = paladdr; }
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void setuphlineasm4(int32_t bxinc, int32_t byinc) { gbxinc = bxinc; gbyinc = byinc; }
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void hlineasm4(int32_t cnt, int32_t skiploadincs, int32_t paloffs, uint32_t by, uint32_t bx, intptr_t p)
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{
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char *palptr;
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palptr = (char *)&ghlinepal[paloffs];
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if (!skiploadincs) { gbxinc = asm1; gbyinc = asm2; }
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for (;cnt>=0;cnt--)
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{
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*((char *)p) = palptr[gbuf[((bx>>(32-glogx))<<glogy)+(by>>(32-glogy))]];
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bx -= gbxinc;
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by -= gbyinc;
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p--;
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}
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}
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//Sloped ceiling/floor vertical line functions
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void setupslopevlin(int32_t logylogx, intptr_t bufplc, int32_t pinc)
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{
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glogx = (logylogx&255); glogy = (logylogx>>8);
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gbuf = (char *)bufplc; gpinc = pinc;
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}
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void slopevlin(intptr_t p, int32_t i, intptr_t slopaloffs, int32_t cnt, int32_t bx, int32_t by)
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{
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int32_t *slopalptr, bz, bzinc;
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uint32_t u, v;
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bz = asm3; bzinc = (asm1>>3);
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slopalptr = (int32_t*)slopaloffs;
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for (;cnt>0;cnt--)
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{
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i = krecip(bz>>6); bz += bzinc;
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u = bx+globalx3*i;
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v = by+globaly3*i;
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(*(char *)p) = *(char *)(((intptr_t)slopalptr[0])+gbuf[((u>>(32-glogx))<<glogy)+(v>>(32-glogy))]);
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slopalptr--;
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p += gpinc;
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}
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}
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//Wall,face sprite/wall sprite vertical line functions
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void setupvlineasm(int32_t neglogy) { glogy = neglogy; }
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void vlineasm1(int32_t vinc, intptr_t paloffs, int32_t cnt, uint32_t vplc, intptr_t bufplc, intptr_t p)
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{
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gbuf = (char *)bufplc;
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gpal = (char *)paloffs;
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for (;cnt>=0;cnt--)
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{
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*((char *)p) = gpal[gbuf[vplc>>glogy]];
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p += bpl;
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vplc += vinc;
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}
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}
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void setupmvlineasm(int32_t neglogy) { glogy = neglogy; }
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void mvlineasm1(int32_t vinc, intptr_t paloffs, int32_t cnt, uint32_t vplc, intptr_t bufplc, intptr_t p)
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{
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char ch;
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gbuf = (char *)bufplc;
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gpal = (char *)paloffs;
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for (;cnt>=0;cnt--)
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{
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ch = gbuf[vplc>>glogy]; if (ch != 255) *((char *)p) = gpal[ch];
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p += bpl;
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vplc += vinc;
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}
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}
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void setuptvlineasm(int32_t neglogy) { glogy = neglogy; }
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void tvlineasm1(int32_t vinc, intptr_t paloffs, int32_t cnt, uint32_t vplc, intptr_t bufplc, intptr_t p)
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{
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char ch;
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gbuf = (char *)bufplc;
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gpal = (char *)paloffs;
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if (transmode)
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{
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for (;cnt>=0;cnt--)
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{
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ch = gbuf[vplc>>glogy];
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if (ch != 255) *((char *)p) = gtrans[(*((char *)p))+(gpal[ch]<<8)];
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p += bpl;
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vplc += vinc;
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}
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}
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else
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{
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for (;cnt>=0;cnt--)
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{
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ch = gbuf[vplc>>glogy];
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if (ch != 255) *((char *)p) = gtrans[((*((char *)p))<<8)+gpal[ch]];
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p += bpl;
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vplc += vinc;
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}
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}
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}
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//Floor sprite horizontal line functions
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void msethlineshift(int32_t logx, int32_t logy) { glogx = logx; glogy = logy; }
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void mhline(intptr_t bufplc, uint32_t bx, int32_t cntup16, int32_t junk, uint32_t by, intptr_t p)
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{
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char ch;
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gbuf = (char *)bufplc;
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gpal = (char *)asm3;
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for (cntup16>>=16;cntup16>0;cntup16--)
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{
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ch = gbuf[((bx>>(32-glogx))<<glogy)+(by>>(32-glogy))];
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if (ch != 255) *((char *)p) = gpal[ch];
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bx += asm1;
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by += asm2;
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p++;
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}
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}
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void tsethlineshift(int32_t logx, int32_t logy) { glogx = logx; glogy = logy; }
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void thline(intptr_t bufplc, uint32_t bx, int32_t cntup16, int32_t junk, uint32_t by, intptr_t p)
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{
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char ch;
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gbuf = (char *)bufplc;
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gpal = (char *)asm3;
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if (transmode)
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{
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for (cntup16>>=16;cntup16>0;cntup16--)
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{
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ch = gbuf[((bx>>(32-glogx))<<glogy)+(by>>(32-glogy))];
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if (ch != 255) *((char *)p) = gtrans[(*((char *)p))+(gpal[ch]<<8)];
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bx += asm1;
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by += asm2;
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p++;
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}
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}
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else
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{
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for (cntup16>>=16;cntup16>0;cntup16--)
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{
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ch = gbuf[((bx>>(32-glogx))<<glogy)+(by>>(32-glogy))];
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if (ch != 255) *((char *)p) = gtrans[((*((char *)p))<<8)+gpal[ch]];
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bx += asm1;
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by += asm2;
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p++;
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}
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}
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}
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//Rotatesprite vertical line functions
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void setupspritevline(intptr_t paloffs, int32_t bxinc, int32_t byinc, int32_t ysiz)
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{
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gpal = (char *)paloffs;
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gbxinc = bxinc;
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gbyinc = byinc;
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glogy = ysiz;
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}
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void spritevline(int32_t bx, int32_t by, int32_t cnt, intptr_t bufplc, intptr_t p)
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{
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gbuf = (char *)bufplc;
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for (;cnt>1;cnt--)
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{
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(*(char *)p) = gpal[gbuf[(bx>>16)*glogy+(by>>16)]];
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bx += gbxinc;
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by += gbyinc;
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p += bpl;
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}
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}
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//Rotatesprite vertical line functions
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void msetupspritevline(intptr_t paloffs, int32_t bxinc, int32_t byinc, int32_t ysiz)
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{
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gpal = (char *)paloffs;
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gbxinc = bxinc;
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gbyinc = byinc;
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glogy = ysiz;
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}
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void mspritevline(int32_t bx, int32_t by, int32_t cnt, intptr_t bufplc, intptr_t p)
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{
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char ch;
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gbuf = (char *)bufplc;
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for (;cnt>1;cnt--)
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{
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ch = gbuf[(bx>>16)*glogy+(by>>16)];
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if (ch != 255)(*(char *)p) = gpal[ch];
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bx += gbxinc;
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by += gbyinc;
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p += bpl;
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}
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}
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void tsetupspritevline(intptr_t paloffs, int32_t bxinc, int32_t byinc, int32_t ysiz)
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{
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gpal = (char *)paloffs;
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gbxinc = bxinc;
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gbyinc = byinc;
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glogy = ysiz;
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}
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void tspritevline(int32_t bx, int32_t by, int32_t cnt, intptr_t bufplc, intptr_t p)
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{
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char ch;
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gbuf = (char *)bufplc;
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if (transmode)
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{
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for (;cnt>1;cnt--)
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{
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ch = gbuf[(bx>>16)*glogy+(by>>16)];
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if (ch != 255) *((char *)p) = gtrans[(*((char *)p))+(gpal[ch]<<8)];
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bx += gbxinc;
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by += gbyinc;
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p += bpl;
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}
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}
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else
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{
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for (;cnt>1;cnt--)
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{
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ch = gbuf[(bx>>16)*glogy+(by>>16)];
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if (ch != 255) *((char *)p) = gtrans[((*((char *)p))<<8)+gpal[ch]];
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bx += gbxinc;
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by += gbyinc;
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p += bpl;
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}
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}
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}
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void setupdrawslab(int32_t dabpl, intptr_t pal)
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{ bpl = dabpl; gpal = (char *)pal; }
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void drawslab(int32_t dx, int32_t v, int32_t dy, int32_t vi, intptr_t vptr, intptr_t p)
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{
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int32_t x;
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while (dy > 0)
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{
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for (x=0;x<dx;x++) *(char *)(p+x) = gpal[(int32_t)(*(char *)((v>>16)+vptr))];
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p += bpl; v += vi; dy--;
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}
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}
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void stretchhline(intptr_t p0, int32_t u, int32_t cnt, int32_t uinc, intptr_t rptr, intptr_t p)
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{
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p0 = p-(cnt<<2);
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do
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{
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p--;
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*(char *)p = *(char *)((u>>16)+rptr); u -= uinc;
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}
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while (p > p0);
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}
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void mmxoverlay() { }
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#endif
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/*
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* vim:ts=4:
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*/
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