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#jpgraph/src/jpgraph_canvas.php

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+<?php
+/*=======================================================================
+ // File:        JPGRAPH_CANVAS.PHP
+ // Description: Canvas drawing extension for JpGraph
+ // Created:     2001-01-08
+ // Ver:         $Id: jpgraph_canvas.php 1923 2010-01-11 13:48:49Z ljp $
+ //
+ // Copyright (c) Asial Corporation. All rights reserved.
+ //========================================================================
+ */
+
+//===================================================
+// CLASS CanvasGraph
+// Description: Creates a simple canvas graph which
+// might be used together with the basic Image drawing
+// primitives. Useful to auickoly produce some arbitrary
+// graphic which benefits from all the functionality in the
+// graph liek caching for example.
+//===================================================
+class CanvasGraph extends Graph {
+    //---------------
+    // CONSTRUCTOR
+    function __construct($aWidth=300,$aHeight=200,$aCachedName="",$timeout=0,$inline=1) {
+        parent::__construct($aWidth,$aHeight,$aCachedName,$timeout,$inline);
+    }
+
+    //---------------
+    // PUBLIC METHODS
+
+    function InitFrame() {
+        $this->StrokePlotArea();
+    }
+
+    // Method description
+    function Stroke($aStrokeFileName="") {
+        if( $this->texts != null ) {
+            for($i=0; $i < count($this->texts); ++$i) {
+                $this->texts[$i]->Stroke($this->img);
+            }
+        }
+        if( $this->iTables !== null ) {
+            for($i=0; $i < count($this->iTables); ++$i) {
+                $this->iTables[$i]->Stroke($this->img);
+            }
+        }
+        $this->StrokeTitles();
+
+        // If the filename is the predefined value = '_csim_special_'
+        // we assume that the call to stroke only needs to do enough
+        // to correctly generate the CSIM maps.
+        // We use this variable to skip things we don't strictly need
+        // to do to generate the image map to improve performance
+        // a best we can. Therefor you will see a lot of tests !$_csim in the
+        // code below.
+        $_csim = ($aStrokeFileName===_CSIM_SPECIALFILE);
+
+        // We need to know if we have stroked the plot in the
+        // GetCSIMareas. Otherwise the CSIM hasn't been generated
+        // and in the case of GetCSIM called before stroke to generate
+        // CSIM without storing an image to disk GetCSIM must call Stroke.
+        $this->iHasStroked = true;
+
+        if( !$_csim ) {
+
+            // Should we do any final image transformation
+            if( $this->iImgTrans ) {
+                if( !class_exists('ImgTrans',false) ) {
+                    require_once('jpgraph_imgtrans.php');
+                }
+
+                $tform = new ImgTrans($this->img->img);
+                $this->img->img = $tform->Skew3D($this->iImgTransHorizon,$this->iImgTransSkewDist,
+                $this->iImgTransDirection,$this->iImgTransHighQ,
+                $this->iImgTransMinSize,$this->iImgTransFillColor,
+                $this->iImgTransBorder);
+            }
+
+
+            // If the filename is given as the special _IMG_HANDLER
+            // then the image handler is returned and the image is NOT
+            // streamed back
+            if( $aStrokeFileName == _IMG_HANDLER ) {
+                return $this->img->img;
+            }
+            else {
+                // Finally stream the generated picture
+                $this->cache->PutAndStream($this->img,$this->cache_name,$this->inline,$aStrokeFileName);
+                return true;
+            }
+        }
+    }
+} // Class
+
+/* EOF */
+?>