- Partly implemented GD driver and updated checksums in tests

1 files changed, 133 insertions, 5 deletions

diff --git a/src/driver/gd.php b/src/driver/gd.php
index d858aa0..5172334 100644
--- a/src/driver/gd.php
+++ b/src/driver/gd.php
@@ -14,11 +14,83 @@
  */
 class ezcGraphGdDriver extends ezcGraphDriver
 {
+
+    /**
+     * Image ressource
+     * 
+     * @var ressource
+     */
+    protected $image;
+
     public function __construct( array $options = array() )
     {
         $this->options = new ezcGraphGdDriverOptions( $options );
     }
 
+    protected function getImage()
+    {
+        if ( !isset( $this->image ) )
+        {
+            $this->image = imagecreatetruecolor( $this->options->width, $this->options->height );
+            imagecolorallocate( $this->image, 255, 255, 255 );
+        }
+
+        return $this->image;
+    }
+
+    protected function allocate( ezcGraphColor $color )
+    {
+        $image = $this->getImage();
+
+        if ( $color->alpha > 0 )
+        {
+            $fetched = imagecolorexactalpha( $image, $color->red, $color->green, $color->blue, $color->alpha / 2 );
+            if ( $fetched < 0 )
+            {
+                $fetched = imagecolorallocatealpha( $image, $color->red, $color->green, $color->blue, $color->alpha / 2 );
+            }
+            return $fetched;
+        }
+        else
+        {
+            $fetched = imagecolorexact( $image, $color->red, $color->green, $color->blue );
+            if ( $fetched < 0 )
+            {
+                $fetched = imagecolorallocate( $image, $color->red, $color->green, $color->blue );
+            }
+            return $fetched;
+        }
+    }
+
+    protected function imageCreateFrom( $file )
+    {
+        $data = getimagesize( $file );
+
+        switch( $data[2] )
+        {
+            case 1:
+                return array(
+                    'width' => $data[0],
+                    'height' => $data[1],
+                    'image' => imagecreatefromgif( $file )
+                );
+            case 2:
+                return array(
+                    'width' => $data[0],
+                    'height' => $data[1],
+                    'image' => imagecreatefromjpeg( $file )
+                );
+            case 3:
+                return array(
+                    'width' => $data[0],
+                    'height' => $data[1],
+                    'image' => imagecreatefrompng( $file )
+                );
+            default:
+                throw new ezcGraphGdDriverUnsupportedImageFormatException( $data[2] );
+        }
+    }
+
     /**
      * Draws a single polygon 
      * 
@@ -29,7 +101,28 @@ class ezcGraphGdDriver extends ezcGraphDriver
      */
     public function drawPolygon( array $points, ezcGraphColor $color, $filled = true )
     {
-        
+        $image = $this->getImage();
+
+        $drawColor = $this->allocate( $color );
+
+        // Create point array
+        $pointCount = count( $points );
+        $pointArray = array();
+        for ( $i = 0; $i < $pointCount; ++$i )
+        {
+            $pointArray[] = $points[$i]->x;
+            $pointArray[] = $points[$i]->y;
+        }
+
+        // Draw polygon
+        if ( $filled )
+        {
+            imagefilledpolygon( $image, $pointArray, $pointCount, $drawColor );
+        }
+        else
+        {
+            imagepolygon( $image, $pointArray, $pointCount, $drawColor );
+        }
     }
     
     /**
@@ -42,7 +135,11 @@ class ezcGraphGdDriver extends ezcGraphDriver
      */
     public function drawLine( ezcGraphCoordinate $start, ezcGraphCoordinate $end, ezcGraphColor $color )
     {
-        
+        $image = $this->getImage();
+
+        $drawColor = $this->allocate( $color );
+
+        imageline( $image, $start->x, $start->y, $end->x, $end->y, $drawColor );
     }
     
     /**
@@ -105,7 +202,18 @@ class ezcGraphGdDriver extends ezcGraphDriver
      */
     public function drawCircle( ezcGraphCoordinate $center, $width, $height, ezcGraphColor $color, $filled = true )
     {
-        
+        $image = $this->getImage();
+
+        $drawColor = $this->allocate( $color );
+
+        if ( $filled )
+        {
+            imagefilledellipse( $image, $center->x, $center->y, $width, $height, $drawColor );
+        }
+        else
+        {
+            imageellipse( $image, $center->x, $center->y, $width, $height, $drawColor );
+        }
     }
     
     /**
@@ -119,7 +227,17 @@ class ezcGraphGdDriver extends ezcGraphDriver
      */
     public function drawImage( $file, ezcGraphCoordinate $position, $width, $height )
     {
-        
+        $imageFile = $this->imageCreateFrom( $file );
+        $image = $this->getImage();
+
+        imagecopyresampled( 
+            $image, 
+            $imageFile['image'], 
+            $position->x, $position->y,
+            0, 0,
+            $position->x + $width, $position->y + $height,
+            $imageFile['width'], $imageFile['height']
+        );
     }
 
     /**
@@ -130,7 +248,17 @@ class ezcGraphGdDriver extends ezcGraphDriver
      */
     public function render ( $file )
     {
-        
+        $image = $this->getImage();
+
+        switch ( $this->options->imageFormat )
+        {
+            case IMG_PNG:
+                imagepng( $image, $file );
+                break;
+            case IMG_JPEG:
+                imagejpeg( $image, $file, $this->options->quality );
+                break;
+        }
     }
 }