Bitmap/Write a PPM file: Difference between revisions

=={{header|PHP}}==

Writes a P6 binary file

<lang PHP>class Bitmap {

public $data;

public $w;

public $h;

public function __construct($w = 16, $h = 16){

$white = array_fill(0, $w, array(255,255,255));

$this->data = array_fill(0, $h, $white);

$this->w = $w;

$this->h = $h;

}

//Fills a rectangle, or the whole image with black by default

public function fill($x = 0, $y = 0, $w = null, $h = null, $color = array(0,0,0)){

if (is_null($w)) $w = $this->w;

if (is_null($h)) $h = $this->h;

$w += $x;

$h += $y;

for ($i = $y; $i < $h; $i++){

for ($j = $x; $j < $w; $j++){

$this->setPixel($j, $i, $color);

}

}

}

public function setPixel($x, $y, $color = array(0,0,0)){

if ($x >= $this->w) return false;

if ($x < 0) return false;

if ($y >= $this->h) return false;

if ($y < 0) return false;

$this->data[$y][$x] = $color;

}

public function getPixel($x, $y){

return $this->data[$y][$x];

}

public function writeP6($filename){

$fh = fopen($filename, 'w');

if (!$fh) return false;

fputs($fh, "P6 {$this->w} {$this->h} 255\n");

foreach ($this->data as $row){

foreach($row as $pixel){

fputs($fh, pack('C', $pixel[0]));

fputs($fh, pack('C', $pixel[1]));

fputs($fh, pack('C', $pixel[2]));

}

}

fclose($fh);

}

}

$b = new Bitmap(16,16);

$b->fill();

$b->fill(2, 2, 18, 18, array(240,240,240));

$b->setPixel(0, 15, array(255,0,0));

$b->writeP6('p6.ppm');</lang>