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Diffstat (limited to 'html/jpgraph/jpgraph_imgtrans.php')
| -rw-r--r-- | html/jpgraph/jpgraph_imgtrans.php | 223 |
1 files changed, 223 insertions, 0 deletions
diff --git a/html/jpgraph/jpgraph_imgtrans.php b/html/jpgraph/jpgraph_imgtrans.php new file mode 100644 index 0000000..411a781 --- /dev/null +++ b/html/jpgraph/jpgraph_imgtrans.php @@ -0,0 +1,223 @@ +<?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) Asial Corporation. 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); + + } + +} + + +?> |