<?php
// License: GNU General Public License (GPL)
// class.logo.php
// @ver 0.1
// Author: Zhihua Lai
// Example URL: http://www.zhihua-lai.com/?do=Software.Logo
// This class is used to do simple Logo Command to a
// Image in PHP
error_reporting(E_ALL);
define('LOGO_WRAP',0);
define('LOGO_FENCE',1);
define('LOGO_WINDOW',2);
class Logo
{
// X,Y Coordinates
var $_x;
var $_y;
// Image Handler
var $_im;
// Width & Height
var $_imagex;
var $_imagey;
var $_half_ix;
var $_half_iy;
// Colors
var $_pc;
var $_fc;
var $_sc;
// Turtle status
var $_draw;
var $_d;
var $_st;
// Fonts
var $_font;
var $_fontw;
var $_fonth;
// Window
var $_win;
function Logo(&$im, $r=255, $g=255, $b=255, $width=720, $height=600)
{
if (!$im)
{
$im=imagecreate($width,$height);
}
$this->_im=$im;
$this->_imagex=imagesx($im);
$this->_imagey=imagesy($im);
$this->_half_ix=$this->_imagex*0.5;
$this->_half_iy=$this->_imagey*0.5;
$this->_d=0;
$this->_draw=true;
$this->_sc=imagecolorallocate($im, $r, $g, $b);
imagefill($im, 0, 0, $this->_sc);
$this->_fc=imagecolorallocate($im, 0, 0, 255);
$this->_pc=imagecolorallocate($im, 0, 0, 0);
$this->_win=LOGO_WINDOW;
$this->_x=0;
$this->_y=0;
$this->_st=true;
$this->_font=4;
$this->_fontw=imagefontwidth(4);
$this->_fonth=imagefontheight(4);
}
function getFont()
{
return ($this->_font);
}
function isTrueColor()
{
return (imageistruecolor($this->_im));
}
function setFont($d)
{
$d=(integer)$d;
if ($d<1) $d=1;
if ($d>5) $d=5;
$this->_font=$d;
$this->_fontw=imagefontwidth($d);
$this->_fonth=imagefontheight($d);
}
public static function getRGB($rgb, &$r, &$g, &$b)
{
$rgb=(integer)$rgb;
$r = ($rgb >> 16) & 0xFF;
$g = ($rgb >> 8) & 0xFF;
$b = $rgb & 0xFF;
}
function printText($x, $y, $s, $font=0)
{
$x=$this->getIXd($x);
$y=$this->getIYd($y);
if ($font)
{
imagestring($this->_im, $font, $x, $y, $s, $this->_pc);
}
else
{
imagestring($this->_im, $this->_font, $x, $y, $s, $this->_pc);
}
return ($this->_fonth);
}
function printTextUp($x, $y, $s, $font=0)
{
$x=$this->getIXd($x);
$y=$this->getIYd($y);
if ($font)
{
imagestringup($this->_im, $font, $x, $y, $s, $this->_pc);
}
else
{
imagestringup($this->_im, $this->_font, $x, $y, $s, $this->_pc);
}
return ($this->_fontw);
}
function getImageX()
{
return $this->_imagex;
}
function getImageY()
{
return $this->_imagey;
}
function getImageHX()
{
return $this->_half_ix;
}
function getImageHY()
{
return $this->_half_iy;
}
function st()
{
$this->_st=true;
}
function ht()
{
$this->_st=false;
}
function getTurtle()
{
return ($this->_st);
}
function drawTurtle()
{
if ($this->_st)
{
$t=$this->_draw;
$this->_draw=true;
$this->arc(360, 3);
$this->_draw=$t;
}
}
function home()
{
$this->_d=0;
$this->lineTo(0,0,true);
}
function getD()
{
return ($this->_d);
}
function setD($d)
{
$d=round($d);
$this->_d=$d;
}
function dot()
{
if ($this->_draw)
{
imagesetpixel($this->_im, $this->getIX(), $this->getIY(), $this->_pc);
}
}
function dotxy($x, $y)
{
if (!$this->_draw) return;
$dr=$this->_draw;
$dx=$this->_x;
$dy=$this->_y;
$this->pu();
$this->setXY($x, $y);
$this->_draw=$dr;
$this->dot();
$this->_x=$dx;
$this->_y=$dy;
}
function cs()
{
//$this->clean();
$this->setXY(0,0);
$this->_d=0;
$this->getRGB($this->_sc, $r, $g, $b);
$this->_sc=imagecolorallocate($this->_im, $r, $g, $b);
}
function setWrap($d)
{
$d=(integer)$d;
switch ($d)
{
case LOGO_FENCE: $this->_win=LOGO_FENCE; break;
case LOGO_WINDOW: $this->_win=LOGO_WINDOW; break;
case LOGO_WRAP: $this->_win=LOGO_WRAP; break;
default: $this->_win=LOGO_WINDOW; break;
}
if (($d == LOGO_WRAP)||($d == LOGO_FENCE))
{
if ($this->isOut())
{
$this->_x=0;
$this->_y=0;
}
return;
}
}
function isWrap()
{
return ($this->_win);
}
function wrapX($x)
{
$this->_crossPoint($this->_x, $this->_y, $x, $this->_y, $nx, $ny);
return ($nx);
}
function wrapY($y)
{
$this->_crossPoint($this->_x, $this->_y, $this->_x, $y, $nx, $ny);
return ($ny);
}
function setX($x)
{
$x=round($x);
$this->_x=$this->wrapX($x);
}
function setY($y)
{
$y=round($y);
$this->_y=$this->wrapY($y);
}
function setXY($x,$y)
{
$this->_crossPoint($this->_x, $this->_y, $x, $y, $this->_x, $this->_y);
}
function getX()
{
return ($this->wrapX($this->_x));
}
function getY()
{
return ($this->wrapY($this->_y));
}
function getIXd($d)
{
$d=round($d);
return ($this->wrapX($d)+$this->_half_ix);
}
function getIYd($d)
{
$d=round($d);
return ($this->wrapY($d)+$this->_half_iy);
}
function getIX()
{
return ($this->getX()+$this->_half_ix);
}
function getIY()
{
return ($this->getY()+$this->_half_iy);
}
function togglePenStatus()
{
$this->_draw=!$this->_draw;
}
function penStatus()
{
return ($this->_draw);
}
function drawLine($x1,$y1,$x2,$y2)
{
$k=$this->_draw;
$this->pd();
$ox=$this->_x;
$oy=$this->_y;
$this->setXY($x1,$y1);
$this->lineTo($x2,$y2);
$this->setXY($ox,$oy);
$this->_draw=$k;
}
function jump($d)
{
$k=$this->_draw;
$this->pu();
$this->fd($d);
$this->_draw = $k;
}
function jmp($d)
{
$this->jump($d);
}
function turn($d)
{
$this->rt($d);
}
function arc($a, $r)
{
$a=round($a) % 360;
$r=round($r);
$s=90;
$e=$s+$a;
if ($r<0)
{
$r=-$r;
$s=270;
$e=$s+$a;
}
if ($e<$s)
{
$t=$e;
$e=$s;
$s=$t;
}
$s+=$this->_d;
$e+=$this->_d;
if ($this->_draw)
{
imagearc($this->_im, $this->getIX(), $this->getIY(),
$r*2, $r*2, $s, $e, $this->_pc);
}
}
function isOutXY($x, $y)
{
return ( ($x>$this->_half_ix) || ($x<-$this->_half_ix) ||
($y>$this->_half_iy) || ($y<-$this->_half_iy));
}
function isOut()
{
return ($this->isOutXY($this->_x, $this->_y));
}
function isIn()
{
return (!$this->isOut());
}
function isInXY($x, $y)
{
return (!$this->isOutXY($x, $y));
}
function _crossPoint($sx, $sy, $ex, $ey, &$fx, &$fy)
{
if ($this->_win == LOGO_WINDOW)
{
$fx=$ex;
$fy=$ey;
return;
}
if (!$this->isOutXY($ex, $ey))
{
$fx=$ex;
$fy=$ey;
return;
}
$k2=$ey-$sy;
$k1=$ex-$sx;
if ($this->_win == LOGO_FENCE)
{
if ($k2 == 0)
{
$fy=$ey;
if ($ex>=$sx)
{
$fx=$this->_half_ix;
}
else
{
$fx=-$this->_half_ix;
}
return;
}
if ($k1 == 0)
{
$fx=$ex;
if ($ey>=$sy)
{
$fy=$this->_half_iy;
}
else
{
$fy=-$this->_half_iy;
}
return;
}
$k=$k2/$k1;
$x1=$this->_half_ix;
$x2=-$this->_half_ix;
$y1=$k*($x1-$sx)+$sy;
$y2=$k*($x2-$sx)+$sy;
$y3=$this->_half_iy;
$y4=-$this->_half_iy;
$x3=($y3-$sy)/$k+$sx;
$x4=($y4-$sy)/$k+$sx;
if (($ey>=$sy)&&($ex>=$sx))
{
if (!$this->isOutXY($x1, $y1))
{
$fx=$x1;
$fy=$y1;
return;
}
else
{
$fx=$x3;
$fy=$y3;
return;
}
}
if (($ey>=$sy)&&($ex<=$sx))
{
if (!$this->isOutXY($x2, $y2))
{
$fx=$x2;
$fy=$y2;
return;
}
else
{
$fx=$x3;
$fy=$y3;
return;
}
}
if (($ey<=$sy)&&($ex<=$sx))
{
if (!$this->isOutXY($x2, $y2))
{
$fx=$x2;
$fy=$y2;
return;
}
else
{
$fx=$x4;
$fy=$y4;
return;
}
}
if (($ey<=$sy)&&($ex>=$sx))
{
if (!$this->isOutXY($x1, $y1))
{
$fx=$x1;
$fy=$y1;
return;
}
else
{
$fx=$x4;
$fy=$y4;
return;
}
}
}
else
if ($this->_win == LOGO_WRAP)
{
if ($k2 == 0)
{
$ny=$ey;
if ($ex>=$sx)
{
$nx=$this->_half_ix;
$eex=$ex-$this->_imagex;
}
else
{
$nx=-$this->_half_ix;
$eex=$ex+$this->_imagex;
}
$this->_crossPoint(-$nx, $ny, $eex, $ny, $fx, $fy);
return;
}
if ($k1 == 0)
{
$nx=$ex;
if ($ey>=$sy)
{
$ny=$this->_half_iy;
$eey=$ey-$this->_imagey;
}
else
{
$ny=-$this->_half_iy;
$eey=$ey+$this->_imagey;
}
$this->_crossPoint($nx, -$ny, $nx, $eey, $fx, $fy);
return;
}
$k=$k2/$k1;
$x1=$this->_half_ix;
$x2=-$this->_half_ix;
$y1=$k*($x1-$sx)+$sy;
$y2=$k*($x2-$sx)+$sy;
$y3=$this->_half_iy;
$y4=-$this->_half_iy;
$x3=($y3-$sy)/$k+$sx;
$x4=($y4-$sy)/$k+$sx;
if (($ey>=$sy)&&($ex>=$sx))
{
if (!$this->isOutXY($x1, $y1))
{
$nx=$x1;
$ny=$y1;
$this->_crossPoint(-$nx, $ny, $ex-$this->_imagex, $ny, $fx, $fy);
return;
}
else
{
$nx=$x3;
$ny=$y3;
$this->_crossPoint($nx, -$ny, $nx, $ey-$this->_imagey, $fx, $fy);
return;
}
}
if (($ey>=$sy)&&($ex<=$sx))
{
if (!$this->isOutXY($x2, $y2))
{
$nx=$x2;
$ny=$y2;
$this->_crossPoint(-$nx, $ny, $ex+$this->_imagex, $ny, $fx, $fy);
return;
}
else
{
$nx=$x3;
$ny=$y3;
$this->_crossPoint($nx, -$ny, $nx, $ey-$this->_imagey, $fx, $fy);
return;
}
}
if (($ey<=$sy)&&($ex<=$sx))
{
if (!$this->isOutXY($x2, $y2))
{
$nx=$x2;
$ny=$y2;
$this->_crossPoint(-$nx, $ny, $ex+$this->_imagex, $ny, $fx, $fy);
return;
}
else
{
$nx=$x4;
$ny=$y4;
$this->_crossPoint($nx, -$ny, $nx, $ey+$this->_imagey, $fx, $fy);
return;
}
}
if (($ey<=$sy)&&($ex>=$sx))
{
if (!$this->isOutXY($x1, $y1))
{
$nx=$x1;
$ny=$y1;
$this->_crossPoint(-$nx, $ny, $ex-$this->_imagex, $ny, $fx, $fy);
return;
}
else
{
$nx=$x4;
$ny=$y4;
$this->_crossPoint($nx, -$ny, $nx, $ey+$this->_imagey, $fx, $fy);
return;
}
}
}
}
function lineTo($x,$y, $moveToPlace=false)
{
if (($x == $this->_x)&&($y == $this->_y))
{
return;
}
if ($this->_draw)
{
if ($this->_win == LOGO_WINDOW)
{
imageline($this->_im, $this->getIX(), $this->getIY(),
$this->getIXd($x), $this->getIYd($y), $this->_pc);
}
else
{
if ($this->_win == LOGO_FENCE)
{
$this->_crossPoint($this->_x, $this->_y, $x, $y, $nx, $ny);
imageline($this->_im, $this->getIX(), $this->getIY(),
$this->getIXd($nx), $this->getIYd($ny), $this->_pc);
}
else
{
$x1=$this->_x;
$y1=$this->_y;
$ix1=$this->getIX();
$iy1=$this->getIY();
$this->_win=LOGO_FENCE;
$this->_crossPoint($x1, $y1, $x, $y, $x3, $y3);
$this->_win=LOGO_WRAP;
imageline($this->_im, $ix1, $iy1, $this->getIXd($x3), $this->getIYd($y3), $this->_pc);
$d=sqrt(($y-$y1)*($y-$y1)+($x-$x1)*($x-$x1));
$d2=($d)-sqrt(($y3-$y1)*($y3-$y1)+($x3-$x1)*($x3-$x1));
if ($d2>0)
{
if (($x3 == $this->_half_ix))
{
$nx=-$x3;
$ny=$y3;
$this->_x=$nx;
$this->_y=$ny;
$this->lineTo($x-$this->_imagex, $y, true);
}
else
if (($x3 == -$this->_half_ix))
{
$nx=-$x3;
$ny=$y3;
$this->_x=$nx;
$this->_y=$ny;
$this->lineTo($x+$this->_imagex, $y, true);
}
else
if (($y3 == $this->_half_iy))
{
$nx=$x3;
$ny=-$ny;
$this->_x=$nx;
$this->_y=$ny;
$this->lineTo($x, $y-$this->_imagey, true);
}
else
if (($y3 == -$this->_half_iy))
{
$nx=$x3;
$ny=-$ny;
$this->_x=$nx;
$this->_y=$ny;
$this->lineTo($x, $y+$this->_imagey, true);
}
}
}
}
}
if ($moveToPlace)
{
$this->setXY($x,$y);
}
}
function setPC($d)
{
$this->getRGB($d, $r, $g, $b);
imagecolordeallocate($this->_im, $this->_pc);
$this->_pc=imagecolorallocate($this->_im, $r, $g, $b);
}
function setPCrgb($r, $g, $b)
{
imagecolordeallocate($this->_im, $this->_pc);
$this->_pc=imagecolorallocate($this->_im, $r, $g, $b);
}
function setFC($d)
{
$this->getRGB($d, $r, $g, $b);
imagecolordeallocate($this->_im, $this->_fc);
$this->_fc=imagecolorallocate($this->_im, $r, $g, $b);
}
function setFCrgb($r, $g, $b)
{
imagecolordeallocate($this->_im, $this->_fc);
$this->_fc=imagecolorallocate($this->_im, $r, $g, $b);
}
function setSC($d)
{
$this->getRGB($d, $r, $g, $b);
imagecolordeallocate($this->_im, $this->_sc);
$this->_sc=imagecolorallocate($this->_im, $r, $g, $b);
}
function setSCrgb($r, $g, $b)
{
imagecolordeallocate($this->_im, $this->_sc);
$this->_sc=imagecolorallocate($this->_im, $r, $g, $b);
}
function getPC()
{
return ((integer)$this->_pc);
}
function getFC()
{
return ((integer)$this->_fc);
}
function getSC()
{
return ((integer)$this->_sc);
}
function pu()
{
$this->_draw=false;
}
function pd()
{
$this->_draw=true;
}
function rt($d)
{
$d=round($d);
$this->_d+=$d;
$this->_d%=360;
}
function lt($d)
{
$this->rt(-$d);
}
function walk($d)
{
$this->fd($d);
}
function fd($d)
{
if ($d == 0)
{
return;
}
$x1=$this->_x;
$y1=$this->_y;
$ix1=$this->getIXd($x1);
$iy1=$this->getIYd($y1);
$x2=round($x1+$d*sin($this->_d*pi()/180));
$y2=round($y1-$d*cos($this->_d*pi()/180));
$ix2=$this->getIXd($x2);
$iy2=$this->getIYd($y2);
if (!$this->isOutXY($x2,$y2))
{
if ($this->_draw)
{
imageline($this->_im, $ix1, $iy1, $ix2, $iy2, $this->_pc);
}
$this->_x=$x2;
$this->_y=$y2;
return;
}
if ($this->_win == LOGO_WINDOW)
{
if ($this->_draw)
{
imageline($this->_im, $ix1, $iy1, $ix2, $iy2, $this->_pc);
}
$this->_x=$x2;
$this->_y=$y2;
return;
}
else
if ($this->_win == LOGO_FENCE)
{
$this->_crossPoint($x1, $y1, $x2, $y2, $x3, $y3);
if ($this->_draw)
{
imageline($this->_im, $ix1, $iy1, $this->getIXd($x3), $this->getIYd($y3), $this->_pc);
}
$this->_x=$x3;
$this->_y=$y3;
}
else
if ($this->_win == LOGO_WRAP)
{
$this->_win=LOGO_FENCE;
$this->_crossPoint($x1, $y1, $x2, $y2, $x3, $y3);
if ($this->_draw)
{
imageline($this->_im, $ix1, $iy1, $this->getIXd($x3), $this->getIYd($y3), $this->_pc);
}
$this->_win=LOGO_WRAP;
$d2=abs($d)-sqrt(($y3-$y1)*($y3-$y1)+($x3-$x1)*($x3-$x1));
if (($x3 == $this->_half_ix)||($x3 == -$this->_half_ix))
{
$this->_x=-$x3;
$this->_y=$y3;
}
else
{
$this->_x=$x3;
$this->_y=-$y3;
}
if ($d>0)
{
$this->fd($d2);
}
else
{
$this->fd(-$d2);
}
}
}
function clean()
{
for ($i=0; $i<=$this->_imagex; $i++)
{
for ($j=0; $j<=$this->_imagey; $j++)
{
imagesetpixel($this->_im, $i, $j, $this->_sc);
}
}
}
function bk($d)
{
$this->fd(-$d);
}
function fill()
{
if ($this->isIn())
{
imagefill($this->_im, $this->getIX(), $this->getIY(), $this->_fc);
}
}
function fillxy($x, $y)
{
if ($this->isInXY($x, $y))
{
imagefill($this->_im, $this->getIXd($x), $this->getIYd($y), $this->_fc);
}
}
function fillxyc($x, $y, $c)
{
if ($this->InXY($x, $y))
{
imagefill($this->_im, $this->getIXd($x), $this->getIYd($y), $c);
}
}
function pe()
{
// Not supported yet
}
}
?>
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