PHP 5.0创建图形的实用方法完整篇第1/3页

<?php

class GraphicsEnvironment

{

 public $width;

 public $height;

 public $gdo;

 public $colors = array();

 public function __construct( $width, $height )

 {

 $this->width = $width;

 $this->height = $height;

 $this->gdo = imagecreatetruecolor( $width, $height );

 $this->addColor( "white", 255, 255, 255 );

 imagefilledrectangle( $this->gdo, 0, 0,

  $width, $height,

  $this->getColor( "white" ) );

 }

 public function width() { return $this->width; }

 public function height() { return $this->height; }

 public function addColor( $name, $r, $g, $b )

 {

 $this->colors[ $name ] = imagecolorallocate(

  $this->gdo,

  $r, $g, $b );

 }

 public function getGraphicObject()

 {

 return $this->gdo;

 }

 public function getColor( $name )

 {

 return $this->colors[ $name ];

 }

 public function saveAsPng( $filename )

 {

 imagepng( $this->gdo, $filename );

 }

}

abstract class GraphicsObject

{

 abstract public function render( $ge );

}

class Line extends GraphicsObject

{

 private $color;

 private $sx;

 private $sy;

 private $ex;

 private $ey;

 public function __construct( $color, $sx, $sy, $ex, $ey )

 {

 $this->color = $color;

 $this->sx = $sx;

 $this->sy = $sy;

 $this->ex = $ex;

 $this->ey = $ey;

 }

 public function render( $ge )

 {

 imageline( $ge->getGraphicObject(),

  $this->sx, $this->sy,

  $this->ex, $this->ey,

  $ge->getColor( $this->color ) );

 }

}

?>

<?php

require_once( "glib.php" );

$ge = new GraphicsEnvironment( 400, 400 );

$ge->addColor( "black", 0, 0, 0 );

$ge->addColor( "red", 255, 0, 0 );

$ge->addColor( "green", 0, 255, 0 );

$ge->addColor( "blue", 0, 0, 255 );

$gobjs = array();

$gobjs []= new Line( "black", 10, 5, 100, 200 );

$gobjs []= new Line( "blue", 200, 150, 390, 380 );

$gobjs []= new Line( "red", 60, 40, 10, 300 );

$gobjs []= new Line( "green", 5, 390, 390, 10 );

foreach( $gobjs as $gobj ) { $gobj->render( $ge ); }

$ge->saveAsPng( "test.png" );

?>

% php test.php

%

<?php

class GraphicsEnvironment

{

 public $width;

 public $height;

 public $gdo;

 public $colors = array();

 public function __construct( $width, $height )

 {

 $this->width = $width;

 $this->height = $height;

 $this->gdo = imagecreatetruecolor( $width, $height );

 $this->addColor( "white", 255, 255, 255 );

 imagefilledrectangle( $this->gdo, 0, 0,

  $width, $height,

  $this->getColor( "white" ) );

 }

 public function width() { return $this->width; }

 public function height() { return $this->height; }

 public function addColor( $name, $r, $g, $b )

 {

 $this->colors[ $name ] = imagecolorallocate(

  $this->gdo,

  $r, $g, $b );

 }

 public function getGraphicObject()

 {

 return $this->gdo;

 }

 public function getColor( $name )

 {

 return $this->colors[ $name ];

 }

 public function saveAsPng( $filename )

 {

 imagepng( $this->gdo, $filename );

 }

}

abstract class GraphicsObject

{

 abstract public function render( $ge );

 abstract public function z();

}

abstract class BoxObject extends GraphicsObject

{

 protected $color;

 protected $sx;

 protected $sy;

 protected $ex;

 protected $ey;

 protected $z;

 public function __construct( $z, $color, $sx, $sy, $ex, $ey )

 {

 $this->z = $z;

 $this->color = $color;

 $this->sx = $sx;

 $this->sy = $sy;

 $this->ex = $ex;

 $this->ey = $ey;

 }

 public function z() { return $this->z; }

}

class Line extends BoxObject

{

 public function render( $ge )

 {

 imageline( $ge->getGraphicObject(),

  $this->sx, $this->sy,

  $this->ex, $this->ey,

  $ge->getColor( $this->color ) );

 }

}

class Rectangle extends BoxObject

{

 public function render( $ge )

 {

 imagefilledrectangle( $ge->getGraphicObject(),

  $this->sx, $this->sy,

  $this->ex, $this->ey,

  $ge->getColor( $this->color ) );

 }

}

class Oval extends BoxObject

{

 public function render( $ge )

 {

 $w = $this->ex - $this->sx;

 $h = $this->ey - $this->sy;

 imagefilledellipse( $ge->getGraphicObject(),

  $this->sx + ( $w / 2 ),

  $this->sy + ( $h / 2 ),

  $w, $h,

  $ge->getColor( $this->color ) );

 }

}

?>

<?php

require_once( "glib.php" );

function zsort( $a, $b )

{

 if ( $a->z() < $b->z() ) return -1;

 if ( $a->z() > $b->z() ) return 1;

 return 0;

}

$ge = new GraphicsEnvironment( 400, 400 );

$ge->addColor( "black", 0, 0, 0 );

$ge->addColor( "red", 255, 0, 0 );

$ge->addColor( "green", 0, 255, 0 );

$ge->addColor( "blue", 0, 0, 255 );

$gobjs = array();

$gobjs []= new Oval( 100, "red", 50, 50, 150, 150 );

$gobjs []= new Rectangle( 200, "black", 100, 100, 300, 300 );

usort( $gobjs, "zsort" );

foreach( $gobjs as $gobj ) { $gobj->render( $ge ); }

$ge->saveAsPng( "test.png" );

?>