bilde_renderer: Add support for dynamically resizing the image drawing

buffer

3 files changed, 50 insertions, 17 deletions

diff --git a/pts-core/objects/bilde_renderer/bilde_png_renderer.php b/pts-core/objects/bilde_renderer/bilde_png_renderer.php
index 68e0347..c03ff3a 100644
--- a/pts-core/objects/bilde_renderer/bilde_png_renderer.php
+++ b/pts-core/objects/bilde_renderer/bilde_png_renderer.php
@@ -25,19 +25,22 @@ class bilde_png_renderer extends bilde_renderer
 {
 	public function __construct($width, $height, $embed_identifiers = "")
 	{
-		$this->image = imagecreate($width, $height);
-
-		imageinterlace($this->image, true);
-
-		if(function_exists("imageantialias"))
-		{
-			imageantialias($this->image, true);
-		}
+		$this->image = $this->init_new_gd_image($width, $height);
+		$this->image_width = $width;
+		$this->image_height = $height;
 	}
 	public function render_image($output_file = null, $quality = 0)
 	{
 		return imagepng($this->image, $output_file, $quality);
 	}
+	public function resize_image($width, $height)
+	{
+		$img = $this->image;
+		$this->image = $this->init_new_gd_image($width, $height);
+		$this->image_width = $width;
+		$this->image_height = $height;
+		$this->image_copy_merge($img, 0, 0);
+	}
 	public function destroy_image()
 	{
 		imagedestroy($this->image);
@@ -199,6 +202,22 @@ class bilde_png_renderer extends bilde_renderer
 
 		return array($box_width, $box_height);
 	}
+
+	// Privates
+
+	private function init_new_gd_image($width, $height)
+	{
+		$img = imagecreate($width, $height);
+
+		imageinterlace($img, true);
+
+		if(function_exists("imageantialias"))
+		{
+			imageantialias($img, true);
+		}
+
+		return $img;
+	}
 }
 
 ?>
diff --git a/pts-core/objects/bilde_renderer/bilde_renderer.php b/pts-core/objects/bilde_renderer/bilde_renderer.php
index 8b03675..1f11697 100644
--- a/pts-core/objects/bilde_renderer/bilde_renderer.php
+++ b/pts-core/objects/bilde_renderer/bilde_renderer.php
@@ -24,9 +24,13 @@
 abstract class bilde_renderer
 {
 	var $image;
+	var $image_width = -1;
+	var $image_height = -1;
+	var $embed_identifiers = null;
 
 	abstract function __construct($width, $height, $embed_identifiers = ""); // create the object
 	abstract function render_image($output_file = null, $quality = 0);
+	abstract function resize_image($width, $height);
 	abstract function destroy_image();
 
 	abstract function write_text_left($text_string, $font_type, $font_size, $font_color, $bound_x1, $bound_y1, $bound_x2, $bound_y2, $rotate_text = false);
diff --git a/pts-core/objects/bilde_renderer/bilde_svg_renderer.php b/pts-core/objects/bilde_renderer/bilde_svg_renderer.php
index 818f850..0169f75 100644
--- a/pts-core/objects/bilde_renderer/bilde_svg_renderer.php
+++ b/pts-core/objects/bilde_renderer/bilde_svg_renderer.php
@@ -25,21 +25,31 @@ class bilde_svg_renderer extends bilde_renderer
 {
 	public function __construct($width, $height, $embed_identifiers = null)
 	{
-		$this->image = "<?xml version=\"1.0\"?>\n<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 1.1//EN\" \"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd\">\n";
+		$this->image_width = $width;
+		$this->image_height = $height;
+		$this->embed_identifiers = $embed_identifiers;
+	}
+	public function resize_image($width, $height)
+	{
+		$this->image_width = $width;
+		$this->image_height = $height;
+	}
+	public function render_image($output_file = null, $quality = 0)
+	{
+		$svg_image = "<?xml version=\"1.0\"?>\n<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 1.1//EN\" \"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd\">\n";
 
-		if(is_array($embed_identifiers))
+		if(is_array($this->embed_identifiers))
 		{
-			foreach($embed_identifiers as $key => $value)
+			foreach($this->embed_identifiers as $key => $value)
 			{
-				$this->image .= "<!-- " . $key . ": " . $value . " -->\n";
+				$svg_image .= "<!-- " . $key . ": " . $value . " -->\n";
 			}
 		}
 
-		$this->image .= "<svg xmlns=\"http://www.w3.org/2000/svg\" version=\"1.1\" viewbox=\"0 0 " . $width . " " . $height . "\" width=\"" . $width . "\" height=\"" . $height . "\">\n\n";
-	}
-	public function render_image($output_file = null, $quality = 0)
-	{
-		return $output_file != null && @file_put_contents($output_file, $this->image . "\n\n</svg>");
+		$svg_image .= "<svg xmlns=\"http://www.w3.org/2000/svg\" version=\"1.1\" viewbox=\"0 0 " . $this->image_width . " " . $this->image_height . "\" width=\"" . $this->image_width . "\" height=\"" . $this->image_height . "\">\n\n";
+		$svg_image .= $this->image . "\n\n</svg>";
+
+		return $output_file != null && @file_put_contents($output_file, $svg_image);
 	}
 	public function destroy_image()
 	{