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a855d62025
This ports Fabien Sanglard's Chocolate Duke to run on a version of SDL for Rockbox. Change-Id: I8f2c4c78af19de10c1633ed7bb7a997b43256dd9
54 lines
1.3 KiB
C
54 lines
1.3 KiB
C
// converted from asm to c by Jonof
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#include <stdio.h>
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#include "platform.h"
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#include "fixedPoint_math.h"
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void clearbuf(void *d, int32_t c, int32_t a)
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{
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int32_t *p = (int32_t*)d;
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while ((c--) > 0) *(p++) = a;
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}
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void clearbufbyte(void *D, int32_t c, int32_t a)
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{ // Cringe City
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uint8_t *p = (uint8_t *)D;
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int32_t m[4] = { 0xffl,0xff00l,0xff0000l,0xff000000l };
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int32_t n[4] = { 0,8,16,24 };
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int32_t z=0;
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while ((c--) > 0) {
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*(p++) = (uint8_t )((a & m[z])>>n[z]);
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z=(z+1)&3;
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}
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}
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void copybuf(void *s, void *d, int32_t c)
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{
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int32_t *p = (int32_t*)s, *q = (int32_t*)d;
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while ((c--) > 0) *(q++) = *(p++);
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}
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void copybufbyte(void *S, void *D, int32_t c)
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{
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uint8_t *p = (uint8_t *)S, *q = (uint8_t *)D;
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while((c--) > 0) *(q++) = *(p++);
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}
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void copybufreverse(void *S, void *D, int32_t c)
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{
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uint8_t *p = (uint8_t *)S, *q = (uint8_t *)D;
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while((c--) > 0) *(q++) = *(p--);
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}
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void qinterpolatedown16(int32_t* bufptr, int32_t num, int32_t val, int32_t add)
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{ // gee, I wonder who could have provided this...
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int32_t i, *lptr = bufptr;
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for(i=0;i<num;i++) { lptr[i] = (val>>16); val += add; }
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}
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void qinterpolatedown16short(int32_t* bufptr, int32_t num, int32_t val, int32_t add)
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{ // ...maybe the same person who provided this too?
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int32_t i; short *sptr = (short *)bufptr;
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for(i=0;i<num;i++) { sptr[i] = (short)(val>>16); val += add; }
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}
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