function GIFDecoder($GIF_pointer)
{
$this->GIF_stream = $GIF_pointer;
GIFDecoder::GIFGetByte(6);
GIFDecoder::GIFGetByte(7);
$this->GIF_screen = $this->GIF_buffer;
$this->GIF_colorF = $this->GIF_buffer[4] & 0x80 ? 1 : 0;
$this->GIF_sorted = $this->GIF_buffer[4] & 0x8 ? 1 : 0;
$this->GIF_colorC = $this->GIF_buffer[4] & 0x7;
$this->GIF_colorS = 2 << $this->GIF_colorC;
if ($this->GIF_colorF == 1) {
GIFDecoder::GIFGetByte(3 * $this->GIF_colorS);
$this->GIF_global = $this->GIF_buffer;
}
for ($cycle = 1; $cycle;) {
if (GIFDecoder::GIFGetByte(1)) {
switch ($this->GIF_buffer[0]) {
case 0x21:
GIFDecoder::GIFReadExtensions();
break;
case 0x2c:
GIFDecoder::GIFReadDescriptor();
break;
case 0x3b:
$cycle = 0;
break;
}
} else {
$cycle = 0;
}
}
}
function GIFDecoder($GIF_pointer)
{
$this->GIF_stream = $GIF_pointer;
GIFDecoder::GIFGetByte(6);
// GIF89a
GIFDecoder::GIFGetByte(7);
// Logical Screen Descriptor
$this->GIF_screen = $this->GIF_buffer;
$this->GIF_colorF = $this->GIF_buffer[4] & 0x80 ? 1 : 0;
$this->GIF_sorted = $this->GIF_buffer[4] & 0x8 ? 1 : 0;
$this->GIF_colorC = $this->GIF_buffer[4] & 0x7;
$this->GIF_colorS = 2 << $this->GIF_colorC;
if ($this->GIF_colorF == 1) {
GIFDecoder::GIFGetByte(3 * $this->GIF_colorS);
$this->GIF_global = $this->GIF_buffer;
}
/*
*
* 05.06.2007.
* Made a little modification
*
*
- for ( $cycle = 1; $cycle; ) {
+ if ( GIFDecoder::GIFGetByte ( 1 ) ) {
- switch ( $this->GIF_buffer [ 0 ] ) {
- case 0x21:
- GIFDecoder::GIFReadExtensions ( );
- break;
- case 0x2C:
- GIFDecoder::GIFReadDescriptor ( );
- break;
- case 0x3B:
- $cycle = 0;
- break;
- }
- }
+ else {
+ $cycle = 0;
+ }
- }
*/
for ($cycle = 1; $cycle;) {
if (GIFDecoder::GIFGetByte(1)) {
switch ($this->GIF_buffer[0]) {
case 0x21:
GIFDecoder::GIFReadExtensions();
break;
case 0x2c:
GIFDecoder::GIFReadDescriptor();
break;
case 0x3b:
$cycle = 0;
break;
}
} else {
$cycle = 0;
}
}
}
