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#include <stdint.h>
#include <sys/time.h>
#include "meh.h"
#define TDEBUG 0
#define GETVAL0(x, c) ((ibuf[(x) * 3 + (c)] * (ur) + ibuf[(x) * 3 + 3+(c)] * (u)) * (vr) >> 20)
#define GETVAL(x, c) (( \
( \
ibuf[(x) * 3 + (c)] * (ur) + \
ibuf[(x) * 3 + 3+(c)] * (u) \
) * (vr) + \
( \
(ibufn[(x) * 3 + (c)]) * (ur) + \
(ibufn[(x) * 3 + 3+(c)]) * (u)\
) * (v)) >> 20)
#if TDEBUG
struct timeval t0;
struct timeval t1;
#endif
void scale(struct image *img, XImage *ximg){
int x, y;
unsigned char * __restrict__ ibuf;
unsigned char * __restrict__ ibufn;
unsigned char * const bufend = &img->buf[img->bufwidth * img->bufheight * 3];
char* __restrict__ newBuf = ximg->data;
unsigned int jdy = ximg->bytes_per_line / 4 - ximg->width;
unsigned int dy = img->bufwidth * 3;
#if TDEBUG
gettimeofday(&t0, NULL);
#endif
unsigned int bufxs[ximg->width];
unsigned int us[ximg->width];
{
unsigned int dx = (img->bufwidth << 10) / ximg->width;
unsigned int bufx = img->bufwidth / ximg->width;
for(x = 0; x < ximg->width; x++){
bufxs[x] = bufx >> 10;
us[x] = (bufx & 1023);
bufx += dx;
}
}
y = 0;
ibuf = img->buf;
ibufn = img->buf + dy;
for(; y < ximg->height; y++){
unsigned int bufy = (y << 10) * img->bufheight / ximg->height;
unsigned int v = (bufy & 1023);
unsigned int vr = 1023^(bufy & 1023);
ibuf = &img->buf[y * img->bufheight / ximg->height * img->bufwidth * 3];
ibufn = ibuf + dy;
if(ibufn >= bufend){
for(x = 0; x < ximg->width; x++){
unsigned int bufx = bufxs[x];
unsigned int u = us[x];
unsigned int ur = 1023^u;
*newBuf++ = GETVAL0(bufx, 2);
*newBuf++ = GETVAL0(bufx, 1);
*newBuf++ = GETVAL0(bufx, 0);
newBuf++;
}
}else{
for(x = 0; x < ximg->width; x++){
unsigned int bufx = bufxs[x];
unsigned int u = us[x];
unsigned int ur = 1023^u;
*newBuf++ = GETVAL(bufx, 2);
*newBuf++ = GETVAL(bufx, 1);
*newBuf++ = GETVAL(bufx, 0);
newBuf++;
}
}
newBuf += jdy;
}
#if TDEBUG
gettimeofday(&t1, NULL);
printf("%li x100us\n", ((t1.tv_sec - t0.tv_sec) * 1000000 + t1.tv_usec - t0.tv_usec) / 100);
#endif
}
void linearscale(struct image *img, XImage *ximg){
int x, y;
unsigned char * __restrict__ ibuf;
char* __restrict__ newBuf = ximg->data;
unsigned int jdy = ximg->bytes_per_line / 4 - ximg->width;
unsigned int dx = (img->bufwidth << 10) / ximg->width;
struct timeval t0;
struct timeval t1;
gettimeofday(&t0, NULL);
for(y = 0; y < ximg->height; y++){
unsigned int bufx = img->bufwidth / ximg->width;
ibuf = &img->buf[y * img->bufheight / ximg->height * img->bufwidth * 3];
for(x = 0; x < ximg->width; x++){
*newBuf++ = (ibuf[(bufx >> 10)*3+2]);
*newBuf++ = (ibuf[(bufx >> 10)*3+1]);
*newBuf++ = (ibuf[(bufx >> 10)*3+0]);
newBuf++;
bufx += dx;
}
newBuf += jdy;
}
#if TDEBUG
gettimeofday(&t1, NULL);
printf("%li x100us\n", ((t1.tv_sec - t0.tv_sec) * 1000000 + t1.tv_usec - t0.tv_usec) / 100);
#endif
}
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