89 lines
1.8 KiB
C
89 lines
1.8 KiB
C
#include <inttypes.h>
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#include "../config.h"
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#include "rgb2rgb.h"
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#include "mmx.h"
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/* TODO: MMX optimization */
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void rgb24to32(uint8_t *src,uint8_t *dst,uint32_t src_size)
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{
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uint32_t *dest = (uint32_t *)dst;
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uint8_t *s = src;
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uint8_t *end;
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end = s + src_size;
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while(s < end)
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{
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uint32_t rgb0;
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rgb0 = *(uint32_t *)s;
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*dest++ = rgb0 & 0xFFFFFFUL;
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s += 3;
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}
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}
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void rgb32to24(uint8_t *src,uint8_t *dst,uint32_t src_size)
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{
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uint8_t *dest = dst;
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uint8_t *s = src;
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uint8_t *end;
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end = s + src_size;
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while(s < end)
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{
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*dest++ = *s++;
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*dest++ = *s++;
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*dest++ = *s++;
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s++;
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}
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}
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/* Original by Strepto/Astral
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ported to gcc & bugfixed : A'rpi */
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void rgb15to16(uint8_t *src,uint8_t *dst,uint32_t src_size)
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{
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#ifdef HAVE_MMX
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static uint64_t mask_b = 0x001F001F001F001FLL; // 00000000 00011111 xxB
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static uint64_t mask_rg = 0x7FE07FE07FE07FE0LL; // 01111111 11100000 RGx
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register char* s=src+src_size;
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register char* d=dst+src_size;
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register int offs=-src_size;
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movq_m2r (mask_b, mm4);
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movq_m2r (mask_rg, mm5);
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while(offs<0){
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movq_m2r (*(s+offs), mm0);
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movq_r2r (mm0, mm1);
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movq_m2r (*(s+8+offs), mm2);
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movq_r2r (mm2, mm3);
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pand_r2r (mm4, mm0);
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pand_r2r (mm5, mm1);
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psllq_i2r(1,mm1);
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pand_r2r (mm4, mm2);
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pand_r2r (mm5, mm3);
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por_r2r (mm1, mm0);
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psllq_i2r(1,mm3);
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movq_r2m (mm0,*(d+offs));
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por_r2r (mm3,mm2);
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movq_r2m (mm2,*(d+8+offs));
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offs+=16;
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}
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emms();
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#else
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uint16_t *s1=( uint16_t * )src;
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uint16_t *d1=( uint16_t * )dst;
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uint16_t *e=((uint8_t *)s1)+src_size;
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while( s1<e ){
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register int x=*( s1++ );
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/* rrrrrggggggbbbbb
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0rrrrrgggggbbbbb
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0111 1111 1110 0000=0x7FE0
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00000000000001 1111=0x001F */
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*( d1++ )=( x&0x001F )|( ( x&0x7FE0 )<<1 );
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}
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#endif
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}
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