PHP implementation of the Chinese circular seal special effects

Whim, wrote a circular seal generator, the font of the arc rotation is quite time-consuming. Finally, the results are good, code archiving.

Method One:

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<?php * * Chinese round seal class * @author lkk/lianq.net * @create on 10:03 2012-5-29 * @example: * $seal = new Circleseal (' You and I he's got to take a stand and walk. North-South ", 75,6,24,0,0,16,40); * $seal->doimg (); * *   class Circleseal {private $sealString;//seal character private $strMaxLeng//maximum character length private $sealRadius;//seal RADIUS private $rimWidth; Border thickness private $innerRadius; Inner circle radius private $startRadius; Pentagram radius private $startAngle; The oblique angle of the pentagram is private $backGround; Seal color private $centerDot; Center coordinates private $IMG; Graphic resource handle private $font; The specified font is private $fontSize; Specifies the font size private $width; Picture width private $height; Picture height private $points; Each point coordinates of the pentagram private $charRadius; string radius private $charAngle; String tilt angle private $spacing; Character interval angle  //Construction method Public Function __construct ($str = ', $rad = +, $rmwidth = 6, $strad =, $stang = 0, $crang = 0, $fsize = $inrad =0) {$this->sealstring = empty ($STR)? ' Seal test string ': $str; $this->strmaxleng = 12; $this->sealradius = $rad; $this->rimwidth = $rmwidth; $this->startradius = $strad; $this->startangle = $stang; $this->charangle = $crang; $this->centerdot = Array (' x ' => $rad, ' y ' => $rad); $this->font = dirname (__file__). ' /simkai.ttf '; $this->fontsize = $fsize; $this->innerradius = $inrad; Default 0, no $this->spacing = 1;  //Create Picture resource Private Function createimg () {$this->width = 2 * $this->sealradius; $this->height = 2 * $this-& Gt;sealradius; $this->img = imagecreate ($this->width, $this->height); Imagecolorresolvealpha ($this->img,255,255,255,127); $this->background = imagecolorallocate ($this->img,255,0,0);  //Draw seal Border Private Function Drawrim () {for ($i =0; $i < $this->rimwidth; $i + +) {Imagearc ($this->img, $this- >centerdot[' x '], $this->centerdot[' y '], $this->width-$i, $this->height-$i, 0,360, $this->background) ;  //Draw inner circle Private Function drawinnercircle () {Imagearc ($this->img, $this->centerdot[' x '), $this-> centerdot[' y '],2* $this->innerradius,2* $this->innerradius,0,360, $thiS->background);  //Draw string Private function drawstring () {//encoding processing $charset = mb_detect_encoding ($this->sealstring); if ($charset!= ' UTF-8 ') {$this->sealstring = mb_convert_encoding ($this->sealstring, ' UTF-8 ', ' GBK ');  //related metering $this-> Charradius = $this->sealradius-$this->rimwidth-$this->fontsize; String Radius $leng = Mb_strlen ($this->sealstring, ' UTF8 '); String length if ($leng > $this->strmaxleng) $leng = $this->strmaxleng; $avgAngle = 360/($this->strmaxleng); Average character gradient  //Split and write String $words = Array (); Character array for ($i =0; $i < $leng; $i + +) {$words [] = Mb_substr ($this->sealstring, $i, 1, ' UTF8 '); $r = 630 + $this-> Charangle + $avgAngle * ($i-$leng/2) + $this->spacing* ($i-1); Coordinate angle $R = 720-$this->charangle + $avgAngle * ($leng -2* $i-1)/2 + $this->spacing* (1-$i); Character angle $x = $this->centerdot[' x '] + $this->charradius * cos (Deg2rad ($r)); The x-coordinate of the character $y = $this->centerdot[' y '] + $this->charradius * sin (Deg2rad ($r)); Y-coordinate IMA for charactersGettftext ($this->img, $this->fontsize, $R, $x, $y, $this->background, $this->font, $words [$i]);  //Draw the Pentagram Private function Drawstart () {$ang _out = + $this->startangle; $ang _in = + $this->startangle; $rad _out = $this->startradius; $rad _in = $rad _out * 0.382; For ($i =0 $i <5; $i + +) {//five vertex coordinates $this->points[] = $rad _out * cos (2*m_pi/5* $i-deg2rad ($ang _out)) + $this-> centerdot[' x ']; $this->points[] = $rad _out * sin (2*m_pi/5* $i-deg2rad ($ang _out)) + $this->centerdot[' y '];  //Concave point coordinates $this->points[] = $rad _in * cos (2*m_pi/5* ($i + 1)-Deg2rad ($ang _in)) + $this->centerdot[' x ']; $this->points[] = $rad _in * sin (2*m_pi/5* ($i + 1)-Deg2rad ($ang _in)) + $this->centerdot[' y ']; Imagefilledpolygon ($this->img, $this->points, $this->background);  //outputs Private function output () {header (' content-type:image/png '); Imagepng ($this->img); Imagedestroy ($ THIS->IMG); }  //external generate public Function doimg () {$this->creatEimg (); $this->drawrim (); $this->drawinnercircle (); $this->drawstring (); $this->drawstart (); $this->output (); } }

Method Two:

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<?php @ $hos =iconv ("GBK", "UTF-8", $_get["hos"]); if (!isset ($hos)) Exit   $im =imagecreate (150,150); $gray =imagecolorresolvealpha ($im, 200,200,200,127); $red =imagecolorallocate ($im, 230,150,150);   for ($i =0 $i <6; $i + +) Imagearc ($im, 75,75,148-$i, 148-$i, 0,360, $red);   $stock = ' C:windowsfontssimkai.ttf '; $point = "★"; $size = 30; Imagettftext ($im, $size, 0,72-$size/2,72+ $size/2, $red, $stock, $point);   $a =75 $b =-75;//Center Point coordinate $r =65 $m =40;//radius, angle $size =16;//font Size $r = $r-$size;   $word =array (); $max = 18; $count =mb_strlen ($hos, ' UTF8 '); if ($count > $max) $count = $max; if ($count >12) $m =floor (360/$count); else if ($count >5) $m-= $count;   for ($i =0 $i < $count $i + +) $word []=mb_substR ($hos, $i, 1, ' UTF8 ');   $J =floor ($count/2); if ($j!= $count/2) {for ($i = $j; $i >=0; $i-) {$arc = $m * ($j-$i) + $size/2; $x =round ($r *cos ((90+ $arc) *m_pi/180)) + $a; $y =- 1* (Round ($r *sin (90+ $arc) *m_pi/180)) + $b); if ($arc <10) $arc = 0; Imagettftext ($im, $size, $arc, $x, $y, $red, $stock, $word [$i]); $arc = $m * ($j-$i)-$size/2; $x =round ($r *cos (90-$arc) *m_pi/180) + $a; $y =-1* (Round ($r *sin (90-$arc) *m_pi/180)) + $b); if ($arc <10) $arc = 0; Imagettftext ($im, $size,-$arc, $x, $y, $red, $stock, $word [$j + $j-$i]); } else {$j = $j-1; for ($i = $j; $i >=0; $i-) {$arc = $m/2+ $m * ($j-$i) + $size/2; $x =round ($r *cos ((90+ $arc) *m_pi/180)) + $a; $ Y=-1* (Round ($r *sin (90+ $arc) *m_pi/180)) + $b); Imagettftext ($im, $size, $arc, $x, $y, $red, $stock, $word [$i]); $arc = $m/2+ $m * ($j-$i)-$size/2; $x =round ($r *cos (90-$arc) *m_pi/180) + $a; $y =-1* (Round ($r *sin (90-$arc) *m_pi/180)) + $b); Imagettftext ($im, $size,-$arc, $x, $y, $red, $stock, $word [$j + $j +1-$i]); }   Header (' content-type:image/png '); Imagepng ($im);?>

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