paysages3d/src/rendering/tools/memory.c
2013-04-17 12:29:51 +00:00

57 lines
1.3 KiB
C

#include "memory.h"
#include <stdlib.h>
#include <string.h>
void* memory2dRealloc(void* data, int datasize, int oldxsize, int oldysize, int newxsize, int newysize, int xoffset, int yoffset)
{
int xstart, xend, xlen;
int ystart, yend, y;
void* result = malloc(datasize * newxsize * newysize);
/* Move remaining part*/
ystart = yoffset;
yend = yoffset + oldysize;
if (yend >= 0 && ystart < newysize)
{
if (ystart < 0)
{
ystart = 0;
}
if (yend > newysize - 1)
{
yend = newysize - 1;
}
xstart = xoffset;
xend = xoffset + oldxsize;
if (xend >= 0 && xstart < newxsize)
{
if (xstart < 0)
{
xstart = 0;
}
if (xend > newxsize - 1)
{
xend = newxsize - 1;
}
xlen = xend - xstart + 1;
if (xlen > 0)
{
for (y = ystart; y <= yend; y++)
{
memcpy(result + (y * newxsize + xstart) * datasize, data + ((y - ystart) * oldxsize) * datasize, xlen * datasize);
}
}
}
}
free(data);
return result;
}
void memory2dScrolling(void* data, int datasize, int xsize, int ysize, int xoffset, int yoffset)
{
/* TODO */
}