cvs: pear /Image_Transform/Driver Cairowrapper.php

cweiske		Tue Apr 29 09:25:05 2008 UTC

  Modified files:              
    /pear/Image_Transform/Driver	Cairowrapper.php 
  Log:
  mirror() and flip() for cairowrapper driver
  
  
http://cvs.php.net/viewvc.cgi/pear/Image_Transform/Driver/Cairowrapper.php?r1=1.3&r2=1.4&diff_format=u
Index: pear/Image_Transform/Driver/Cairowrapper.php
diff -u pear/Image_Transform/Driver/Cairowrapper.php:1.3 pear/Image_Transform/Driver/Cairowrapper.php:1.4
--- pear/Image_Transform/Driver/Cairowrapper.php:1.3	Mon Apr 28 21:55:13 2008
+++ pear/Image_Transform/Driver/Cairowrapper.php	Tue Apr 29 09:25:05 2008
@@ -18,7 +18,7 @@
  * @author     Christian Weiske <[email protected]>
  * @copyright  2008 The PHP Group
  * @license    http://www.php.net/license/3_0.txt  PHP License 3.0
- * @version    CVS: $Id: Cairowrapper.php,v 1.3 2008/04/28 21:55:13 cweiske Exp $
+ * @version    CVS: $Id: Cairowrapper.php,v 1.4 2008/04/29 09:25:05 cweiske Exp $
  * @link       http://pear.php.net/package/Image_Transform
  */
 require_once 'Image/Transform.php';
@@ -144,12 +144,10 @@
 
         cairo_scale($outputContext, $xFactor, $yFactor);
 
-        $inputContext = cairo_create($this->surface);
         cairo_set_source_surface($outputContext, $this->surface, 0, 0);
         cairo_paint($outputContext);
 
         cairo_destroy($outputContext);
-        cairo_destroy($inputContext);
 
         cairo_surface_destroy($this->surface);
 
@@ -211,5 +209,61 @@
         $this->surface = null;
     }//function free()
 
+
+
+    /**
+     * Mirrors the image horizontally
+     * Uses an affine transformation matrix to flip the image.
+     *
+     * @return void
+     */
+    function flip()
+    {
+        $outputSurface = cairo_image_surface_create(
+            CAIRO_FORMAT_ARGB32, $this->img_x, $this->img_y
+        );
+        $outputContext = cairo_create($outputSurface);
+        //                            xx, yx, xy, yy, x0, y0
+        $matrix = cairo_matrix_create(1,  0,  0,  -1,  0, $this->img_y);
+
+        cairo_set_matrix($outputContext, $matrix);
+        cairo_set_source_surface($outputContext, $this->surface, 0, 0);
+        cairo_paint($outputContext);
+
+        cairo_destroy($outputContext);
+        cairo_surface_destroy($this->surface);
+
+        $this->surface = $outputSurface;
+    }//function flip()
+
+
+
+    /**
+     * Mirrors the image vertically.
+     * Uses an affine transformation matrix to mirror the image.
+     *
+     * 123 -> 321
+     *
+     * @return void
+     */
+    function mirror()
+    {
+        $outputSurface = cairo_image_surface_create(
+            CAIRO_FORMAT_ARGB32, $this->img_x, $this->img_y
+        );
+        $outputContext = cairo_create($outputSurface);
+        //                            xx, yx, xy, yy, x0, y0
+        $matrix = cairo_matrix_create(-1, 0,  0,  1, $this->img_x, 0);
+
+        cairo_set_matrix($outputContext, $matrix);
+        cairo_set_source_surface($outputContext, $this->surface, 0, 0);
+        cairo_paint($outputContext);
+
+        cairo_destroy($outputContext);
+        cairo_surface_destroy($this->surface);
+
+        $this->surface = $outputSurface;
+    }//function mirror()
+
 }//class Image_Transform_Driver_Cairowrapper extends Image_Transform
 ?>
\ No newline at end of file