sprites/S16File.php

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<?php
require_once(dirname(__FILE__)."/../support/FileReader.php");
require_once(dirname(__FILE__).'/SpriteFile.php');
require_once(dirname(__FILE__)."/S16Frame.php");



class S16File extends SpriteFile {

    
    private $encoding;
    private $frameCount;
    private $frames;
    private $reader;
    


    public function S16File(IReader $reader)
    {
        parent::SpriteFile('S16');
        $this->reader = $reader;
        $buffer = $this->reader->ReadInt(4);
        if($buffer == 1) {
            $this->encoding = "565";
        } else if($buffer == 0) {
            $this->encoding = "555";
        } else {
            throw new Exception("File encoding not recognised. (".$buffer.'|'.$this->reader->GetPosition().')');
        }
        $this->frameCount = $this->reader->ReadInt(2);
        for($i=0; $i < $this->frameCount; $i++)
        {
            $this->AddFrame(new S16Frame($this->reader,$this->encoding));
        }
    }

    public function SetEncoding($encoding) {
        $this->EnsureDecompiled();
        $this->encoding = $encoding;
    }


    public function Compile() {
        $data = ''; 
        /* S16 and C16 are actually the same format....
         * C16 just has RLE. But they're different classes.
         * not very DRY, I know. This is better for magic though. */
        $flags = 0; 
        // 0b00 => 555 S16,
        // 0b01 => 565 S16,
        // 0b10 => 555 C16,
        // 0b11 => 565 C16
        if($this->encoding == '565') {
            $flags = $flags | 1;
        }
        $data .= pack('V',$flags);
        $data .= pack('v',$this->GetFrameCount());
        $idata = '';
        $offset = 6+(8*$this->GetFrameCount());
        foreach($this->GetFrames() as $frame) {
            $data .= pack('V',$offset);
            $data .= pack('vv',$frame->GetWidth(),$frame->GetHeight());

            $framebin = $frame->Encode();
            $offset += strlen($framebin); 
            $idata .= $framebin;
        }
        return $data . $idata;
    }
}
?>