mirror of
https://github.com/DrBeef/Raze.git
synced 2024-12-16 15:40:58 +00:00
400 lines
12 KiB
C
400 lines
12 KiB
C
#pragma once
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#ifndef ENGINE_PRIV_H
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#define ENGINE_PRIV_H
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#define MAXPERMS 512
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#define MAXARTFILES_BASE 200
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#define MAXARTFILES_TOTAL 220
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#define MAXCLIPDIST 1024
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// Uncomment to clear the screen before each top-level draw (classic only).
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// FIXME: doesn't work with mirrors.
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//#define ENGINE_CLEAR_SCREEN
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#ifdef YAX_ENABLE
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# define YAX_MAXDRAWS 8
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#endif
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#if !defined(NOASM) && defined __cplusplus
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extern "C" {
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#endif
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extern intptr_t asm1, asm2, asm3, asm4;
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extern int32_t globalx1, globaly2;
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#if !defined(NOASM) && defined __cplusplus
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}
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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extern uint16_t ATTRIBUTE((used)) sqrtable[4096], ATTRIBUTE((used)) shlookup[4096+256];
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#if defined(_MSC_VER) && !defined(NOASM)
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//
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// Microsoft C Inline Assembly Routines
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//
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static inline int32_t nsqrtasm(int32_t a)
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{
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_asm
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{
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push ebx
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mov eax, a
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test eax, 0xff000000
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mov ebx, eax
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jnz short over24
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shr ebx, 12
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mov cx, word ptr shlookup[ebx*2]
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jmp short under24
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over24 :
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shr ebx, 24
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mov cx, word ptr shlookup[ebx*2+8192]
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under24 :
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shr eax, cl
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mov cl, ch
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mov ax, word ptr sqrtable[eax*2]
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shr eax, cl
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pop ebx
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}
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}
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static inline int32_t getclipmask(int32_t a, int32_t b, int32_t c, int32_t d)
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{
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_asm
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{
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push ebx
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mov eax, a
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mov ebx, b
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mov ecx, c
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mov edx, d
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sar eax, 31
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add ebx, ebx
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adc eax, eax
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add ecx, ecx
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adc eax, eax
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add edx, edx
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adc eax, eax
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mov ebx, eax
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shl ebx, 4
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or al, 0xf0
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xor eax, ebx
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pop ebx
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}
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}
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static inline int32_t getkensmessagecrc(void *b)
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{
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_asm
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{
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push ebx
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mov ebx, b
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xor eax, eax
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mov ecx, 32
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beg:
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mov edx, dword ptr[ebx+ecx*4-4]
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ror edx, cl
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adc eax, edx
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bswap eax
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loop short beg
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pop ebx
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}
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}
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#elif defined(__GNUC__) && defined(__i386__) && !defined(NOASM) // _MSC_VER
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//
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// GCC "Inline" Assembly Routines
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//
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#define nsqrtasm(a) \
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({ int32_t __r, __a=(a); \
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__asm__ __volatile__ ( \
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"testl $0xff000000, %%eax\n\t" \
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"movl %%eax, %%ebx\n\t" \
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"jnz 0f\n\t" \
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"shrl $12, %%ebx\n\t" \
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"movw " ASMSYM("shlookup") "(,%%ebx,2), %%cx\n\t" \
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"jmp 1f\n\t" \
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"0:\n\t" \
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"shrl $24, %%ebx\n\t" \
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"movw (" ASMSYM("shlookup") "+8192)(,%%ebx,2), %%cx\n\t" \
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"1:\n\t" \
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"shrl %%cl, %%eax\n\t" \
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"movb %%ch, %%cl\n\t" \
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"movw " ASMSYM("sqrtable") "(,%%eax,2), %%ax\n\t" \
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"shrl %%cl, %%eax" \
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: "=a" (__r) : "a" (__a) : "ebx", "ecx", "cc"); \
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__r; })
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#define getclipmask(a,b,c,d) \
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({ int32_t __a=(a), __b=(b), __c=(c), __d=(d); \
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__asm__ __volatile__ ("sarl $31, %%eax; addl %%ebx, %%ebx; adcl %%eax, %%eax; " \
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"addl %%ecx, %%ecx; adcl %%eax, %%eax; addl %%edx, %%edx; " \
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"adcl %%eax, %%eax; movl %%eax, %%ebx; shl $4, %%ebx; " \
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"orb $0xf0, %%al; xorl %%ebx, %%eax" \
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: "=a" (__a), "=b" (__b), "=c" (__c), "=d" (__d) \
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: "a" (__a), "b" (__b), "c" (__c), "d" (__d) : "cc"); \
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__a; })
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#define getkensmessagecrc(b) \
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({ int32_t __a, __b=(b); \
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__asm__ __volatile__ ( \
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"xorl %%eax, %%eax\n\t" \
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"movl $32, %%ecx\n\t" \
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"0:\n\t" \
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"movl -4(%%ebx,%%ecx,4), %%edx\n\t" \
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"rorl %%cl, %%edx\n\t" \
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"adcl %%edx, %%eax\n\t" \
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"bswapl %%eax\n\t" \
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"loop 0b" \
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: "=a" (__a) : "b" (__b) : "ecx", "edx" \
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__a; })
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#else // __GNUC__ && __i386__
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static inline int32_t nsqrtasm(uint32_t a)
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{
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// JBF 20030901: This was a damn lot simpler to reverse engineer than
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// msqrtasm was. Really, it was just like simplifying an algebra equation.
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uint16_t c;
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if (a & 0xff000000) // test eax, 0xff000000 / jnz short over24
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{
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c = shlookup[(a >> 24) + 4096]; // mov ebx, eax
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// over24: shr ebx, 24
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// mov cx, word ptr shlookup[ebx*2+8192]
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}
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else
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{
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c = shlookup[a >> 12]; // mov ebx, eax
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// shr ebx, 12
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// mov cx, word ptr shlookup[ebx*2]
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// jmp short under24
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}
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a >>= c&0xff; // under24: shr eax, cl
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a = (a&0xffff0000)|(sqrtable[a]); // mov ax, word ptr sqrtable[eax*2]
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a >>= ((c&0xff00) >> 8); // mov cl, ch
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// shr eax, cl
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return a;
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}
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static inline int32_t getclipmask(int32_t a, int32_t b, int32_t c, int32_t d)
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{
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// Ken did this
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d = ((a<0)<<3) + ((b<0)<<2) + ((c<0)<<1) + (d<0);
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return (((d<<4)^0xf0)|d);
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}
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inline int32_t getkensmessagecrc(int32_t b)
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{
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UNREFERENCED_PARAMETER(b);
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return 0x56c764d4l;
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}
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#endif
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extern int16_t thesector[MAXWALLSB], thewall[MAXWALLSB];
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extern int16_t bunchfirst[MAXWALLSB], bunchlast[MAXWALLSB];
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extern int16_t maskwall[MAXWALLSB], maskwallcnt;
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extern uspritetype *tspriteptr[MAXSPRITESONSCREEN + 1];
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extern int32_t xdimen, xdimenrecip, halfxdimen, xdimenscale, xdimscale, ydimen;
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extern float fxdimen;
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extern intptr_t frameoffset;
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extern int32_t globalposx, globalposy, globalposz, globalhoriz;
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extern float fglobalposx, fglobalposy, fglobalposz;
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extern int16_t globalang, globalcursectnum;
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extern int32_t globalpal, cosglobalang, singlobalang;
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extern int32_t cosviewingrangeglobalang, sinviewingrangeglobalang;
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extern int32_t globalhisibility, globalpisibility, globalcisibility;
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extern int32_t globvis, globalvisibility;
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extern int32_t xyaspect;
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extern int32_t globalshade;
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extern int16_t globalpicnum;
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extern int32_t globalorientation;
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extern int16_t editstatus;
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extern int16_t searchit;
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extern int32_t searchx, searchy;
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extern int16_t searchsector, searchwall, searchstat;
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extern int16_t searchbottomwall, searchisbottom;
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extern char inpreparemirror;
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extern char picsiz[MAXTILES];
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extern int16_t sectorborder[256];
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extern int32_t qsetmode;
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extern int32_t hitallsprites;
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extern int32_t xb1[MAXWALLSB];
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extern int32_t rx1[MAXWALLSB], ry1[MAXWALLSB];
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extern int16_t bunchp2[MAXWALLSB];
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extern int16_t numscans, numbunches;
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extern int32_t rxi[8], ryi[8];
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#ifdef USE_OPENGL
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// For GL_EXP2 fog:
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#define FOGSCALE 0.0000768f
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void calc_and_apply_fog(int32_t tile, int32_t shade, int32_t vis, int32_t pal);
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void calc_and_apply_fog_factor(int32_t tile, int32_t shade, int32_t vis, int32_t pal, float factor);
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#endif
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extern void get_wallspr_points(uspritetype const * const spr, int32_t *x1, int32_t *x2,
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int32_t *y1, int32_t *y2);
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extern void get_floorspr_points(uspritetype const * const spr, int32_t px, int32_t py,
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int32_t *x1, int32_t *x2, int32_t *x3, int32_t *x4,
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int32_t *y1, int32_t *y2, int32_t *y3, int32_t *y4);
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// int32_t wallmost(int16_t *mostbuf, int32_t w, int32_t sectnum, char dastat);
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int32_t wallfront(int32_t l1, int32_t l2);
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void set_globalang(int16_t ang);
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#ifdef DEBUGGINGAIDS
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int32_t animateoffs(int const tilenum, int fakevar);
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#define DO_TILE_ANIM(Picnum, Fakevar) do { \
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if (picanm[Picnum].sf&PICANM_ANIMTYPE_MASK) Picnum += animateoffs(Picnum, Fakevar); \
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} while (0)
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#else
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int32_t animateoffs(int const tilenum);
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#define DO_TILE_ANIM(Picnum, Fakevar) do { \
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if (picanm[Picnum].sf&PICANM_ANIMTYPE_MASK) Picnum += animateoffs(Picnum); \
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} while (0)
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#endif
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FORCE_INLINE int32_t bad_tspr(const uspritetype *tspr)
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{
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// NOTE: tspr->owner >= MAXSPRITES (could be model) has to be handled by
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// caller.
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return (tspr->owner < 0 || (unsigned)tspr->picnum >= MAXTILES);
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}
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//
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// getpalookup (internal)
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//
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FORCE_INLINE int32_t getpalookup(int32_t davis, int32_t dashade)
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{
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return min(max(dashade + (davis >> 8), 0), numshades - 1);
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}
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FORCE_INLINE int32_t getpalookupsh(int32_t davis) { return getpalookup(davis, globalshade) << 8; }
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void dorotspr_handle_bit2(int32_t *sx, int32_t *sy, int32_t *z, int32_t dastat,
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int32_t cx1_plus_cx2, int32_t cy1_plus_cy2,
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int32_t *ret_ouryxaspect, int32_t *ret_ourxyaspect);
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////// yax'y stuff //////
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#ifdef USE_OPENGL
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extern void polymost_scansector(int32_t sectnum);
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#endif
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int32_t engine_addtsprite(int16_t z, int16_t sectnum);
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#ifdef YAX_ENABLE
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extern int32_t g_nodraw, scansector_retfast;
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extern int32_t yax_globallev, yax_globalbunch;
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extern int32_t yax_globalcf, yax_nomaskpass, yax_nomaskdidit;
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extern uint8_t haveymost[YAX_MAXBUNCHES>>3];
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extern uint8_t yax_gotsector[MAXSECTORS>>3];
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FORCE_INLINE int32_t yax_isislandwall(int32_t line, int32_t cf) { return (yax_vnextsec(line, cf) >= 0); }
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#endif
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#ifdef YAX_DEBUG
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extern char m32_debugstr[64][128];
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extern int32_t m32_numdebuglines;
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# define yaxdebug(fmt, ...) do { if (m32_numdebuglines<64) Bsnprintf(m32_debugstr[m32_numdebuglines++], 128, fmt, ##__VA_ARGS__); } while (0)
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# define yaxprintf(fmt, ...) do { initprintf(fmt, ##__VA_ARGS__); } while (0)
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#else
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# define yaxdebug(fmt, ...)
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# define yaxprintf(fmt, ...)
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#endif
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#if defined(_MSC_VER) && !defined(NOASM)
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static inline void setgotpic(int32_t a)
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{
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_asm {
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push ebx
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mov eax, a
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mov ebx, eax
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cmp byte ptr walock[eax], 200
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jae skipit
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mov byte ptr walock[eax], 199
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skipit:
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shr eax, 3
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and ebx, 7
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mov dl, byte ptr gotpic[eax]
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mov bl, byte ptr pow2char[ebx]
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or dl, bl
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mov byte ptr gotpic[eax], dl
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pop ebx
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}
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}
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#elif defined(__GNUC__) && defined(__i386__) && !defined(NOASM) // _MSC_VER
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#define setgotpic(a) \
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({ int32_t __a=(a); \
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__asm__ __volatile__ ( \
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"movl %%eax, %%ebx\n\t" \
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"cmpb $200, " ASMSYM("walock") "(%%eax)\n\t" \
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"jae 0f\n\t" \
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"movb $199, " ASMSYM("walock") "(%%eax)\n\t" \
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"0:\n\t" \
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"shrl $3, %%eax\n\t" \
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"andl $7, %%ebx\n\t" \
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"movb " ASMSYM("gotpic") "(%%eax), %%dl\n\t" \
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"movb " ASMSYM("pow2char") "(%%ebx), %%bl\n\t" \
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"orb %%bl, %%dl\n\t" \
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"movb %%dl, " ASMSYM("gotpic") "(%%eax)" \
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: "=a" (__a) : "a" (__a) \
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: "ebx", "edx", "memory", "cc"); \
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__a; })
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#else // __GNUC__ && __i386__
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FORCE_INLINE void setgotpic(int32_t tilenume)
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{
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if (walock[tilenume] < 200) walock[tilenume] = 199;
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gotpic[tilenume>>3] |= pow2char[tilenume&7];
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}
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#endif
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// Get properties of parallaxed sky to draw.
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// Returns: pointer to tile offset array. Sets-by-pointer the other three.
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FORCE_INLINE const int8_t *getpsky(int32_t picnum, int32_t *dapyscale, int32_t *dapskybits, int32_t *dapyoffs)
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{
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psky_t const * const psky = &multipsky[getpskyidx(picnum)];
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if (dapskybits)
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*dapskybits = (pskybits_override == -1 ? psky->lognumtiles : pskybits_override);
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if (dapyscale)
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*dapyscale = (parallaxyscale_override == 0 ? psky->horizfrac : parallaxyscale_override);
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if (dapyoffs)
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*dapyoffs = psky->yoffs + parallaxyoffs_override;
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return psky->tileofs;
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}
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FORCE_INLINE void set_globalpos(int32_t const x, int32_t const y, int32_t const z)
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{
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globalposx = x, fglobalposx = (float)x;
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globalposy = y, fglobalposy = (float)y;
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globalposz = z, fglobalposz = (float)z;
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}
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#ifdef __cplusplus
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}
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#endif
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#endif /* ENGINE_PRIV_H */
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