1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 | <?php //======================================================================= // File: JPGRAPH_IMGTRANS.PHP // Description: Extension for JpGraph to do some simple img transformations // Created: 2003-09-06 // Ver: $Id: jpgraph_imgtrans.php 1106 2009-02-22 20:16:35Z ljp $ // // Copyright (c) Aditus Consulting. All rights reserved. //======================================================================== //------------------------------------------------------------------------ // Class ImgTrans // Perform some simple image transformations. //------------------------------------------------------------------------ class ImgTrans { private $gdImg=null; function __construct($aGdImg) { // Constructor $this->gdImg = $aGdImg; } // -------------------------------------------------------------------- // _TransVert3D() and _TransHor3D() are helper methods to // Skew3D(). // -------------------------------------------------------------------- function _TransVert3D($aGdImg,$aHorizon=100,$aSkewDist=120,$aDir=SKEW3D_DOWN,$aMinSize=true,$aFillColor='#FFFFFF',$aQuality=false,$aBorder=false,$aHorizonPos=0.5) { // Parameter check if( $aHorizonPos < 0 || $aHorizonPos > 1.0 ) { JpGraphError::RaiseL(9001); //("Value for image transformation out of bounds.\nVanishing point on horizon must be specified as a value between 0 and 1."); } $w = imagesx($aGdImg); $h = imagesy($aGdImg); // Create new image $ww = $w; if( $aMinSize ) $hh = ceil($h * $aHorizon / ($aSkewDist+$h)); else $hh = $h; $newgdh = imagecreatetruecolor($ww,$hh); $crgb = new RGB( $newgdh ); $fillColor = $crgb->Allocate($aFillColor); imagefilledrectangle($newgdh,0,0,$ww-1,$hh-1,$fillColor); if( $aBorder ) { $colidx = $crgb->Allocate($aBorder); imagerectangle($newgdh,0,0,$ww-1,$hh-1,$colidx); } $mid = round($w * $aHorizonPos); $last=$h; for($y=0; $y < $h; ++$y) { $yp = $h-$y-1; $yt = floor($yp * $aHorizon / ($aSkewDist + $yp)); if( !$aQuality ) { if( $last <= $yt ) continue ; $last = $yt; } for($x=0; $x < $w; ++$x) { $xt = ($x-$mid) * $aSkewDist / ($aSkewDist + $yp); if( $aDir == SKEW3D_UP ) $rgb = imagecolorat($aGdImg,$x,$h-$y-1); else $rgb = imagecolorat($aGdImg,$x,$y); $r = ($rgb >> 16) & 0xFF; $g = ($rgb >> 8) & 0xFF; $b = $rgb & 0xFF; $colidx = imagecolorallocate($newgdh,$r,$g,$b); $xt = round($xt+$mid); if( $aDir == SKEW3D_UP ) { $syt = $yt; } else { $syt = $hh-$yt-1; } if( !empty($set[$yt]) ) { $nrgb = imagecolorat($newgdh,$xt,$syt); $nr = ($nrgb >> 16) & 0xFF; $ng = ($nrgb >> 8) & 0xFF; $nb = $nrgb & 0xFF; $colidx = imagecolorallocate($newgdh,floor(($r+$nr)/2), floor(($g+$ng)/2),floor(($b+$nb)/2)); } imagesetpixel($newgdh,$xt,$syt,$colidx); } $set[$yt] = true; } return $newgdh; } // -------------------------------------------------------------------- // _TransVert3D() and _TransHor3D() are helper methods to // Skew3D(). // -------------------------------------------------------------------- function _TransHor3D($aGdImg,$aHorizon=100,$aSkewDist=120,$aDir=SKEW3D_LEFT,$aMinSize=true,$aFillColor='#FFFFFF',$aQuality=false,$aBorder=false,$aHorizonPos=0.5) { $w = imagesx($aGdImg); $h = imagesy($aGdImg); // Create new image $hh = $h; if( $aMinSize ) $ww = ceil($w * $aHorizon / ($aSkewDist+$w)); else $ww = $w; $newgdh = imagecreatetruecolor($ww,$hh); $crgb = new RGB( $newgdh ); $fillColor = $crgb->Allocate($aFillColor); imagefilledrectangle($newgdh,0,0,$ww-1,$hh-1,$fillColor); if( $aBorder ) { $colidx = $crgb->Allocate($aBorder); imagerectangle($newgdh,0,0,$ww-1,$hh-1,$colidx); } $mid = round($h * $aHorizonPos); $last = -1; for($x=0; $x < $w-1; ++$x) { $xt = floor($x * $aHorizon / ($aSkewDist + $x)); if( !$aQuality ) { if( $last >= $xt ) continue ; $last = $xt; } for($y=0; $y < $h; ++$y) { $yp = $h-$y-1; $yt = ($yp-$mid) * $aSkewDist / ($aSkewDist + $x); if( $aDir == SKEW3D_RIGHT ) $rgb = imagecolorat($aGdImg,$w-$x-1,$y); else $rgb = imagecolorat($aGdImg,$x,$y); $r = ($rgb >> 16) & 0xFF; $g = ($rgb >> 8) & 0xFF; $b = $rgb & 0xFF; $colidx = imagecolorallocate($newgdh,$r,$g,$b); $yt = floor($hh-$yt-$mid-1); if( $aDir == SKEW3D_RIGHT ) { $sxt = $ww-$xt-1; } else $sxt = $xt ; if( !empty($set[$xt]) ) { $nrgb = imagecolorat($newgdh,$sxt,$yt); $nr = ($nrgb >> 16) & 0xFF; $ng = ($nrgb >> 8) & 0xFF; $nb = $nrgb & 0xFF; $colidx = imagecolorallocate($newgdh,floor(($r+$nr)/2), floor(($g+$ng)/2),floor(($b+$nb)/2)); } imagesetpixel($newgdh,$sxt,$yt,$colidx); } $set[$xt] = true; } return $newgdh; } // -------------------------------------------------------------------- // Skew image for the apperance of a 3D effect // This transforms an image into a 3D-skewed version // of the image. The transformation is specified by giving the height // of the artificial horizon and specifying a "skew" factor which // is the distance on the horizon line between the point of // convergence and perspective line. // // The function returns the GD handle of the transformed image // leaving the original image untouched. // // Parameters: // * $aGdImg, GD handle to the image to be transformed // * $aHorizon, Distance to the horizon // * $aSkewDist, Distance from the horizon point of convergence // on the horizon line to the perspective points. A larger // value will fore-shorten the image more // * $aDir, parameter specifies type of convergence. This of this // as the walls in a room you are looking at. This specifies if the // image should be applied on the left,right,top or bottom walls. // * $aMinSize, true=make the new image just as big as needed, // false = keep the image the same size as the original image // * $aFillColor, Background fill color in the image // * $aHiQuality, true=performa some interpolation that improves // the image quality but at the expense of performace. Enabling // high quality will have a dramatic effect on the time it takes // to transform an image. // * $aBorder, if set to anything besides false this will draw a // a border of the speciied color around the image // -------------------------------------------------------------------- function Skew3D($aHorizon=120,$aSkewDist=150,$aDir=SKEW3D_DOWN,$aHiQuality=false,$aMinSize=true,$aFillColor='#FFFFFF',$aBorder=false) { return $this->_Skew3D($this->gdImg,$aHorizon,$aSkewDist,$aDir,$aHiQuality, $aMinSize,$aFillColor,$aBorder); } function _Skew3D($aGdImg,$aHorizon=120,$aSkewDist=150,$aDir=SKEW3D_DOWN,$aHiQuality=false,$aMinSize=true,$aFillColor='#FFFFFF',$aBorder=false) { if( $aDir == SKEW3D_DOWN || $aDir == SKEW3D_UP ) return $this->_TransVert3D($aGdImg,$aHorizon,$aSkewDist,$aDir,$aMinSize,$aFillColor,$aHiQuality,$aBorder); else return $this->_TransHor3D($aGdImg,$aHorizon,$aSkewDist,$aDir,$aMinSize,$aFillColor,$aHiQuality,$aBorder); } } ?> |