| <?php | <?php |
| //======================================================================= | //======================================================================= |
| // File: JPGRAPH_IMGTRANS.PHP | // File: JPGRAPH_IMGTRANS.PHP |
| // Description: Extension for JpGraph to do some simple img transformations | // Description: Extension for JpGraph to do some simple img transformations |
| // Created: 2003-09-06 | // Created: 2003-09-06 |
| // Ver: $Id: jpgraph_imgtrans.php 1106 2009-02-22 20:16:35Z ljp $ | // Ver: $Id: jpgraph_imgtrans.php 1106 2009-02-22 20:16:35Z ljp $ |
| // | // |
| // Copyright (c) Aditus Consulting. All rights reserved. | // Copyright (c) Aditus Consulting. All rights reserved. |
| //======================================================================== | //======================================================================== |
| //------------------------------------------------------------------------ | //------------------------------------------------------------------------ |
| // Class ImgTrans | // Class ImgTrans |
| // Perform some simple image transformations. | // Perform some simple image transformations. |
| //------------------------------------------------------------------------ | //------------------------------------------------------------------------ |
| class ImgTrans { | class ImgTrans { |
| private $gdImg=null; | private $gdImg=null; |
| function __construct($aGdImg) { | function __construct($aGdImg) { |
| // Constructor | // Constructor |
| $this->gdImg = $aGdImg; | $this->gdImg = $aGdImg; |
| } | } |
| // -------------------------------------------------------------------- | // -------------------------------------------------------------------- |
| // _TransVert3D() and _TransHor3D() are helper methods to | // _TransVert3D() and _TransHor3D() are helper methods to |
| // Skew3D(). | // Skew3D(). |
| // -------------------------------------------------------------------- | // -------------------------------------------------------------------- |
| function _TransVert3D($aGdImg,$aHorizon=100,$aSkewDist=120,$aDir=SKEW3D_DOWN,$aMinSize=true,$aFillColor='#FFFFFF',$aQuality=false,$aBorder=false,$aHorizonPos=0.5) { | function _TransVert3D($aGdImg,$aHorizon=100,$aSkewDist=120,$aDir=SKEW3D_DOWN,$aMinSize=true,$aFillColor='#FFFFFF',$aQuality=false,$aBorder=false,$aHorizonPos=0.5) { |
| // Parameter check | // Parameter check |
| if( $aHorizonPos < 0 || $aHorizonPos > 1.0 ) { | if( $aHorizonPos < 0 || $aHorizonPos > 1.0 ) { |
| JpGraphError::RaiseL(9001); | JpGraphError::RaiseL(9001); |
| //("Value for image transformation out of bounds.\nVanishing point on horizon must be specified as a value between 0 and 1."); | //("Value for image transformation out of bounds.\nVanishing point on horizon must be specified as a value between 0 and 1."); |
| } | } |
| $w = imagesx($aGdImg); | $w = imagesx($aGdImg); |
| $h = imagesy($aGdImg); | $h = imagesy($aGdImg); |
| // Create new image | // Create new image |
| $ww = $w; | $ww = $w; |
| if( $aMinSize ) | if( $aMinSize ) |
| $hh = ceil($h * $aHorizon / ($aSkewDist+$h)); | $hh = ceil($h * $aHorizon / ($aSkewDist+$h)); |
| else | else |
| $hh = $h; | $hh = $h; |
| $newgdh = imagecreatetruecolor($ww,$hh); | $newgdh = imagecreatetruecolor($ww,$hh); |
| $crgb = new RGB( $newgdh ); | $crgb = new RGB( $newgdh ); |
| $fillColor = $crgb->Allocate($aFillColor); | $fillColor = $crgb->Allocate($aFillColor); |
| imagefilledrectangle($newgdh,0,0,$ww-1,$hh-1,$fillColor); | imagefilledrectangle($newgdh,0,0,$ww-1,$hh-1,$fillColor); |
| if( $aBorder ) { | if( $aBorder ) { |
| $colidx = $crgb->Allocate($aBorder); | $colidx = $crgb->Allocate($aBorder); |
| imagerectangle($newgdh,0,0,$ww-1,$hh-1,$colidx); | imagerectangle($newgdh,0,0,$ww-1,$hh-1,$colidx); |
| } | } |
| $mid = round($w * $aHorizonPos); | $mid = round($w * $aHorizonPos); |
| $last=$h; | $last=$h; |
| for($y=0; $y < $h; ++$y) { | for($y=0; $y < $h; ++$y) { |
| $yp = $h-$y-1; | $yp = $h-$y-1; |
| $yt = floor($yp * $aHorizon / ($aSkewDist + $yp)); | $yt = floor($yp * $aHorizon / ($aSkewDist + $yp)); |
| if( !$aQuality ) { | if( !$aQuality ) { |
| if( $last <= $yt ) continue ; | if( $last <= $yt ) continue ; |
| $last = $yt; | $last = $yt; |
| } | } |
| for($x=0; $x < $w; ++$x) { | for($x=0; $x < $w; ++$x) { |
| $xt = ($x-$mid) * $aSkewDist / ($aSkewDist + $yp); | $xt = ($x-$mid) * $aSkewDist / ($aSkewDist + $yp); |
| if( $aDir == SKEW3D_UP ) | if( $aDir == SKEW3D_UP ) |
| $rgb = imagecolorat($aGdImg,$x,$h-$y-1); | $rgb = imagecolorat($aGdImg,$x,$h-$y-1); |
| else | else |
| $rgb = imagecolorat($aGdImg,$x,$y); | $rgb = imagecolorat($aGdImg,$x,$y); |
| $r = ($rgb >> 16) & 0xFF; | $r = ($rgb >> 16) & 0xFF; |
| $g = ($rgb >> 8) & 0xFF; | $g = ($rgb >> 8) & 0xFF; |
| $b = $rgb & 0xFF; | $b = $rgb & 0xFF; |
| $colidx = imagecolorallocate($newgdh,$r,$g,$b); | $colidx = imagecolorallocate($newgdh,$r,$g,$b); |
| $xt = round($xt+$mid); | $xt = round($xt+$mid); |
| if( $aDir == SKEW3D_UP ) { | if( $aDir == SKEW3D_UP ) { |
| $syt = $yt; | $syt = $yt; |
| } | } |
| else { | else { |
| $syt = $hh-$yt-1; | $syt = $hh-$yt-1; |
| } | } |
| if( !empty($set[$yt]) ) { | if( !empty($set[$yt]) ) { |
| $nrgb = imagecolorat($newgdh,$xt,$syt); | $nrgb = imagecolorat($newgdh,$xt,$syt); |
| $nr = ($nrgb >> 16) & 0xFF; | $nr = ($nrgb >> 16) & 0xFF; |
| $ng = ($nrgb >> 8) & 0xFF; | $ng = ($nrgb >> 8) & 0xFF; |
| $nb = $nrgb & 0xFF; | $nb = $nrgb & 0xFF; |
| $colidx = imagecolorallocate($newgdh,floor(($r+$nr)/2), | $colidx = imagecolorallocate($newgdh,floor(($r+$nr)/2), |
| floor(($g+$ng)/2),floor(($b+$nb)/2)); | floor(($g+$ng)/2),floor(($b+$nb)/2)); |
| } | } |
| imagesetpixel($newgdh,$xt,$syt,$colidx); | imagesetpixel($newgdh,$xt,$syt,$colidx); |
| } | } |
| $set[$yt] = true; | $set[$yt] = true; |
| } | } |
| return $newgdh; | return $newgdh; |
| } | } |
| // -------------------------------------------------------------------- | // -------------------------------------------------------------------- |
| // _TransVert3D() and _TransHor3D() are helper methods to | // _TransVert3D() and _TransHor3D() are helper methods to |
| // Skew3D(). | // Skew3D(). |
| // -------------------------------------------------------------------- | // -------------------------------------------------------------------- |
| function _TransHor3D($aGdImg,$aHorizon=100,$aSkewDist=120,$aDir=SKEW3D_LEFT,$aMinSize=true,$aFillColor='#FFFFFF',$aQuality=false,$aBorder=false,$aHorizonPos=0.5) { | function _TransHor3D($aGdImg,$aHorizon=100,$aSkewDist=120,$aDir=SKEW3D_LEFT,$aMinSize=true,$aFillColor='#FFFFFF',$aQuality=false,$aBorder=false,$aHorizonPos=0.5) { |
| $w = imagesx($aGdImg); | $w = imagesx($aGdImg); |
| $h = imagesy($aGdImg); | $h = imagesy($aGdImg); |
| // Create new image | // Create new image |
| $hh = $h; | $hh = $h; |
| if( $aMinSize ) | if( $aMinSize ) |
| $ww = ceil($w * $aHorizon / ($aSkewDist+$w)); | $ww = ceil($w * $aHorizon / ($aSkewDist+$w)); |
| else | else |
| $ww = $w; | $ww = $w; |
| $newgdh = imagecreatetruecolor($ww,$hh); | $newgdh = imagecreatetruecolor($ww,$hh); |
| $crgb = new RGB( $newgdh ); | $crgb = new RGB( $newgdh ); |
| $fillColor = $crgb->Allocate($aFillColor); | $fillColor = $crgb->Allocate($aFillColor); |
| imagefilledrectangle($newgdh,0,0,$ww-1,$hh-1,$fillColor); | imagefilledrectangle($newgdh,0,0,$ww-1,$hh-1,$fillColor); |
| if( $aBorder ) { | if( $aBorder ) { |
| $colidx = $crgb->Allocate($aBorder); | $colidx = $crgb->Allocate($aBorder); |
| imagerectangle($newgdh,0,0,$ww-1,$hh-1,$colidx); | imagerectangle($newgdh,0,0,$ww-1,$hh-1,$colidx); |
| } | } |
| $mid = round($h * $aHorizonPos); | $mid = round($h * $aHorizonPos); |
| $last = -1; | $last = -1; |
| for($x=0; $x < $w-1; ++$x) { | for($x=0; $x < $w-1; ++$x) { |
| $xt = floor($x * $aHorizon / ($aSkewDist + $x)); | $xt = floor($x * $aHorizon / ($aSkewDist + $x)); |
| if( !$aQuality ) { | if( !$aQuality ) { |
| if( $last >= $xt ) continue ; | if( $last >= $xt ) continue ; |
| $last = $xt; | $last = $xt; |
| } | } |
| for($y=0; $y < $h; ++$y) { | for($y=0; $y < $h; ++$y) { |
| $yp = $h-$y-1; | $yp = $h-$y-1; |
| $yt = ($yp-$mid) * $aSkewDist / ($aSkewDist + $x); | $yt = ($yp-$mid) * $aSkewDist / ($aSkewDist + $x); |
| if( $aDir == SKEW3D_RIGHT ) | if( $aDir == SKEW3D_RIGHT ) |
| $rgb = imagecolorat($aGdImg,$w-$x-1,$y); | $rgb = imagecolorat($aGdImg,$w-$x-1,$y); |
| else | else |
| $rgb = imagecolorat($aGdImg,$x,$y); | $rgb = imagecolorat($aGdImg,$x,$y); |
| $r = ($rgb >> 16) & 0xFF; | $r = ($rgb >> 16) & 0xFF; |
| $g = ($rgb >> 8) & 0xFF; | $g = ($rgb >> 8) & 0xFF; |
| $b = $rgb & 0xFF; | $b = $rgb & 0xFF; |
| $colidx = imagecolorallocate($newgdh,$r,$g,$b); | $colidx = imagecolorallocate($newgdh,$r,$g,$b); |
| $yt = floor($hh-$yt-$mid-1); | $yt = floor($hh-$yt-$mid-1); |
| if( $aDir == SKEW3D_RIGHT ) { | if( $aDir == SKEW3D_RIGHT ) { |
| $sxt = $ww-$xt-1; | $sxt = $ww-$xt-1; |
| } | } |
| else | else |
| $sxt = $xt ; | $sxt = $xt ; |
| if( !empty($set[$xt]) ) { | if( !empty($set[$xt]) ) { |
| $nrgb = imagecolorat($newgdh,$sxt,$yt); | $nrgb = imagecolorat($newgdh,$sxt,$yt); |
| $nr = ($nrgb >> 16) & 0xFF; | $nr = ($nrgb >> 16) & 0xFF; |
| $ng = ($nrgb >> 8) & 0xFF; | $ng = ($nrgb >> 8) & 0xFF; |
| $nb = $nrgb & 0xFF; | $nb = $nrgb & 0xFF; |
| $colidx = imagecolorallocate($newgdh,floor(($r+$nr)/2), | $colidx = imagecolorallocate($newgdh,floor(($r+$nr)/2), |
| floor(($g+$ng)/2),floor(($b+$nb)/2)); | floor(($g+$ng)/2),floor(($b+$nb)/2)); |
| } | } |
| imagesetpixel($newgdh,$sxt,$yt,$colidx); | imagesetpixel($newgdh,$sxt,$yt,$colidx); |
| } | } |
| $set[$xt] = true; | $set[$xt] = true; |
| } | } |
| return $newgdh; | return $newgdh; |
| } | } |
| // -------------------------------------------------------------------- | // -------------------------------------------------------------------- |
| // Skew image for the apperance of a 3D effect | // Skew image for the apperance of a 3D effect |
| // This transforms an image into a 3D-skewed version | // This transforms an image into a 3D-skewed version |
| // of the image. The transformation is specified by giving the height | // of the image. The transformation is specified by giving the height |
| // of the artificial horizon and specifying a "skew" factor which | // of the artificial horizon and specifying a "skew" factor which |
| // is the distance on the horizon line between the point of | // is the distance on the horizon line between the point of |
| // convergence and perspective line. | // convergence and perspective line. |
| // | // |
| // The function returns the GD handle of the transformed image | // The function returns the GD handle of the transformed image |
| // leaving the original image untouched. | // leaving the original image untouched. |
| // | // |
| // Parameters: | // Parameters: |
| // * $aGdImg, GD handle to the image to be transformed | // * $aGdImg, GD handle to the image to be transformed |
| // * $aHorizon, Distance to the horizon | // * $aHorizon, Distance to the horizon |
| // * $aSkewDist, Distance from the horizon point of convergence | // * $aSkewDist, Distance from the horizon point of convergence |
| // on the horizon line to the perspective points. A larger | // on the horizon line to the perspective points. A larger |
| // value will fore-shorten the image more | // value will fore-shorten the image more |
| // * $aDir, parameter specifies type of convergence. This of this | // * $aDir, parameter specifies type of convergence. This of this |
| // as the walls in a room you are looking at. This specifies if the | // 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. | // image should be applied on the left,right,top or bottom walls. |
| // * $aMinSize, true=make the new image just as big as needed, | // * $aMinSize, true=make the new image just as big as needed, |
| // false = keep the image the same size as the original image | // false = keep the image the same size as the original image |
| // * $aFillColor, Background fill color in the image | // * $aFillColor, Background fill color in the image |
| // * $aHiQuality, true=performa some interpolation that improves | // * $aHiQuality, true=performa some interpolation that improves |
| // the image quality but at the expense of performace. Enabling | // the image quality but at the expense of performace. Enabling |
| // high quality will have a dramatic effect on the time it takes | // high quality will have a dramatic effect on the time it takes |
| // to transform an image. | // to transform an image. |
| // * $aBorder, if set to anything besides false this will draw a | // * $aBorder, if set to anything besides false this will draw a |
| // a border of the speciied color around the image | // a border of the speciied color around the image |
| // -------------------------------------------------------------------- | // -------------------------------------------------------------------- |
| function Skew3D($aHorizon=120,$aSkewDist=150,$aDir=SKEW3D_DOWN,$aHiQuality=false,$aMinSize=true,$aFillColor='#FFFFFF',$aBorder=false) { | 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, | return $this->_Skew3D($this->gdImg,$aHorizon,$aSkewDist,$aDir,$aHiQuality, |
| $aMinSize,$aFillColor,$aBorder); | $aMinSize,$aFillColor,$aBorder); |
| } | } |
| function _Skew3D($aGdImg,$aHorizon=120,$aSkewDist=150,$aDir=SKEW3D_DOWN,$aHiQuality=false,$aMinSize=true,$aFillColor='#FFFFFF',$aBorder=false) { | function _Skew3D($aGdImg,$aHorizon=120,$aSkewDist=150,$aDir=SKEW3D_DOWN,$aHiQuality=false,$aMinSize=true,$aFillColor='#FFFFFF',$aBorder=false) { |
| if( $aDir == SKEW3D_DOWN || $aDir == SKEW3D_UP ) | if( $aDir == SKEW3D_DOWN || $aDir == SKEW3D_UP ) |
| return $this->_TransVert3D($aGdImg,$aHorizon,$aSkewDist,$aDir,$aMinSize,$aFillColor,$aHiQuality,$aBorder); | return $this->_TransVert3D($aGdImg,$aHorizon,$aSkewDist,$aDir,$aMinSize,$aFillColor,$aHiQuality,$aBorder); |
| else | else |
| return $this->_TransHor3D($aGdImg,$aHorizon,$aSkewDist,$aDir,$aMinSize,$aFillColor,$aHiQuality,$aBorder); | return $this->_TransHor3D($aGdImg,$aHorizon,$aSkewDist,$aDir,$aMinSize,$aFillColor,$aHiQuality,$aBorder); |
| } | } |
| } | } |
| ?> | ?> |