function GIFReadDescriptor()
{
$GIF_screen = array();
GIFDecoder::GIFGetByte(9);
$GIF_screen = $this->GIF_buffer;
$GIF_colorF = $this->GIF_buffer[8] & 0x80 ? 1 : 0;
if ($GIF_colorF) {
$GIF_code = $this->GIF_buffer[8] & 0x7;
$GIF_sort = $this->GIF_buffer[8] & 0x20 ? 1 : 0;
} else {
$GIF_code = $this->GIF_colorC;
$GIF_sort = $this->GIF_sorted;
}
$GIF_size = 2 << $GIF_code;
$this->GIF_screen[4] &= 0x70;
$this->GIF_screen[4] |= 0x80;
$this->GIF_screen[4] |= $GIF_code;
if ($GIF_sort) {
$this->GIF_screen[4] |= 0x8;
}
$this->GIF_string = "GIF87a";
GIFDecoder::GIFPutByte($this->GIF_screen);
if ($GIF_colorF == 1) {
GIFDecoder::GIFGetByte(3 * $GIF_size);
GIFDecoder::GIFPutByte($this->GIF_buffer);
} else {
GIFDecoder::GIFPutByte($this->GIF_global);
}
$this->GIF_string .= chr(0x2c);
$GIF_screen[8] &= 0x40;
GIFDecoder::GIFPutByte($GIF_screen);
GIFDecoder::GIFGetByte(1);
GIFDecoder::GIFPutByte($this->GIF_buffer);
for (;;) {
GIFDecoder::GIFGetByte(1);
GIFDecoder::GIFPutByte($this->GIF_buffer);
if (($u = $this->GIF_buffer[0]) == 0x0) {
break;
}
GIFDecoder::GIFGetByte($u);
GIFDecoder::GIFPutByte($this->GIF_buffer);
}
$this->GIF_string .= chr(0x3b);
/*
Add frames into $GIF_stream array...
*/
$this->GIF_arrays[] = $this->GIF_string;
}
function GIFReadDescriptor()
{
$GIF_screen = array();
GIFDecoder::GIFGetByte(9);
$GIF_screen = $this->GIF_buffer;
$GIF_colorF = $this->GIF_buffer[8] & 0x80 ? 1 : 0;
if ($GIF_colorF) {
$GIF_code = $this->GIF_buffer[8] & 0x7;
$GIF_sort = $this->GIF_buffer[8] & 0x20 ? 1 : 0;
} else {
$GIF_code = $this->GIF_colorC;
$GIF_sort = $this->GIF_sorted;
}
$GIF_size = 2 << $GIF_code;
$this->GIF_screen[4] &= 0x70;
$this->GIF_screen[4] |= 0x80;
$this->GIF_screen[4] |= $GIF_code;
if ($GIF_sort) {
$this->GIF_screen[4] |= 0x8;
}
/*
*
* GIF Data Begin
*
*/
if ($this->GIF_TransparentI) {
$this->GIF_string = "GIF89a";
} else {
$this->GIF_string = "GIF87a";
}
GIFDecoder::GIFPutByte($this->GIF_screen);
if ($GIF_colorF == 1) {
GIFDecoder::GIFGetByte(3 * $GIF_size);
if ($this->GIF_TransparentI) {
$this->GIF_TransparentR = $this->GIF_buffer[3 * $this->GIF_TransparentI + 0];
$this->GIF_TransparentG = $this->GIF_buffer[3 * $this->GIF_TransparentI + 1];
$this->GIF_TransparentB = $this->GIF_buffer[3 * $this->GIF_TransparentI + 2];
}
GIFDecoder::GIFPutByte($this->GIF_buffer);
} else {
if ($this->GIF_TransparentI) {
$this->GIF_TransparentR = $this->GIF_global[3 * $this->GIF_TransparentI + 0];
$this->GIF_TransparentG = $this->GIF_global[3 * $this->GIF_TransparentI + 1];
$this->GIF_TransparentB = $this->GIF_global[3 * $this->GIF_TransparentI + 2];
}
GIFDecoder::GIFPutByte($this->GIF_global);
}
if ($this->GIF_TransparentI) {
$this->GIF_string .= "!ù" . chr($this->GIF_TransparentI) . "";
}
$this->GIF_string .= chr(0x2c);
$GIF_screen[8] &= 0x40;
GIFDecoder::GIFPutByte($GIF_screen);
GIFDecoder::GIFGetByte(1);
GIFDecoder::GIFPutByte($this->GIF_buffer);
for (;;) {
GIFDecoder::GIFGetByte(1);
GIFDecoder::GIFPutByte($this->GIF_buffer);
if (($u = $this->GIF_buffer[0]) == 0x0) {
break;
}
GIFDecoder::GIFGetByte($u);
GIFDecoder::GIFPutByte($this->GIF_buffer);
}
$this->GIF_string .= chr(0x3b);
/*
*
* GIF Data End
*
*/
$this->GIF_arrays[] = $this->GIF_string;
}
