[SOLVED] Some problem understanding the code

#define SDRAM_BASE_ADDR 0x28000000

static uint16_t *fb  = (uint16_t *)SDRAM_BASE_ADDR;

void GLCD_DrawChar (unsigned int x, unsigned int y, unsigned int cw, unsigned int ch, unsigned char *c) {
  unsigned int i, j, k, pixs;

  k  = (cw + 7)/8;

  if (k == 1) {
    for (j = 0; j < ch; j++) {
      pixs = *(unsigned char *)c;
      c += 1;
    
      for (i = 0; i < cw; i++) {
       #if (LANDSCAPE == 0)
        fb[(y+j)*PHYS_XSZ + (x+i)] = Color[(pixs >> i) & 1];
       #else
        fb[(x+i)*PHYS_XSZ + (y+j)] = Color[(pixs >> i) & 1];
       #endif
      }
    }
  }
  else if (k == 2) {
    for (j = 0; j < ch; j++) {
      pixs = *(unsigned short *)c;
      c += 2;
      
      for (i = 0; i < cw; i++) {
       #if (LANDSCAPE == 0)
        fb[(y+j)*PHYS_XSZ + (x+i)] = Color[(pixs >> i) & 1];
       #else
        fb[(x+i)*PHYS_XSZ + (y+j)] = Color[(pixs >> i) & 1];
       #endif
      }
    }
  }
}

 fb[(y+j)*PHYS_XSZ+(x+i)]

Color[(pixs>>i)&1]