int ff_rle_encode(uint8_t *outbuf, int out_size, const uint8_t *ptr , int bpp, int w, int add_rep, int xor_rep, int add_raw, int xor_raw) { int count, x; uint8_t *out = outbuf; for(x = 0; x < w; x += count) { /* see if we can encode the next set of pixels with RLE */ if((count = count_pixels(ptr, w-x, bpp, 1)) > 1) { if(out + bpp + 1 > outbuf + out_size) return -1; *out++ = (count ^ xor_rep) + add_rep; memcpy(out, ptr, bpp); out += bpp; } else { /* fall back on uncompressed */ count = count_pixels(ptr, w-x, bpp, 0); *out++ = (count ^ xor_raw) + add_raw; if(out + bpp*count > outbuf + out_size) return -1; memcpy(out, ptr, bpp * count); out += bpp * count; } ptr += count * bpp; } return out - outbuf; }