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