Added support for text stroke in text() method

claviska · Aug 8, 2015 · 09a37c0 · 09a37c0
1 parent 0e69996
commit 09a37c0
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Showing 2 changed files with 39 additions and 2 deletions.
diff --git a/example/index.php b/example/index.php
@@ -111,6 +111,9 @@
     // Text
     $img->load('butterfly.jpg')->text('Butterfly', __DIR__.'/delicious.ttf', 32, '#FFFFFF', 'bottom', 0, -20)->save('processed/butterfly-text.jpg');
 
+    // Text with stroke
+    $img->load('butterfly.jpg')->text('Butterfly', __DIR__.'/delicious.ttf', 32, '#FFFFFF', 'bottom', 0, -20, '#000', 2)->save('processed/butterfly-text-with-stroke.jpg');
+
     // Resizing GIFs with transparency
     $img->load('basketball.gif')->resize(50, 50)->save('processed/basketball-resize.gif');
 

diff --git a/src/abeautifulsite/SimpleImage.php b/src/abeautifulsite/SimpleImage.php
@@ -960,7 +960,7 @@ function smooth($level) {
      * @throws Exception
      *
      */
-    function text($text, $font_file, $font_size = 12, $color = '#000000', $position = 'center', $x_offset = 0, $y_offset = 0) {
+    function text($text, $font_file, $font_size = 12, $color = '#000000', $position = 'center', $x_offset = 0, $y_offset = 0, $stroke_color = null, $stroke_size = null) {
 
         // todo - this method could be improved to support the text angle
         $angle = 0;
@@ -1021,7 +1021,15 @@ function text($text, $font_file, $font_size = 12, $color = '#000000', $position
         // Add the text
         imagesavealpha($this->image, true);
         imagealphablending($this->image, true);
-        imagettftext($this->image, $font_size, $angle, $x, $y, $color, $font_file, $text);
+        if( isset($stroke_color) && isset($stroke_size) ) {
+            // Text with stroke
+            $rgba = $this->normalize_color($color);
+            $stroke_color = imagecolorallocatealpha($this->image, $rgba['r'], $rgba['g'], $rgba['b'], $rgba['a']);
+            $this->imagettfstroketext($this->image, $font_size, $angle, $x, $y, $color, $stroke_color, $stroke_size, $font_file, $text);
+        } else {
+            // Text without stroke
+            imagettftext($this->image, $font_size, $angle, $x, $y, $color, $font_file, $text);
+        }
 
         return $this;
 
@@ -1199,6 +1207,32 @@ protected function imagecopymerge_alpha($dst_im, $src_im, $dst_x, $dst_y, $src_x
 
     }
 
+    /**
+     *  Same as imagettftext(), but allows for a stroke color and size
+     *
+     * @param  object &$image       A GD image object
+     * @param  float $size          The font size
+     * @param  float $angle         The angle in degrees
+     * @param  int $x               X-coordinate of the starting position
+     * @param  int $y               Y-coordinate of the starting position
+     * @param  int &$textcolor      The color index of the text
+     * @param  int &$stroke_color   The color index of the stroke
+     * @param  int $stroke_size     The stroke size in pixels
+     * @param  string $fontfile     The path to the font to use
+     * @param  string $text         The text to output
+     *
+     * @return array                This method has the same return values as imagettftext()
+     *
+     */
+    protected function imagettfstroketext(&$image, $size, $angle, $x, $y, &$textcolor, &$strokecolor, $stroke_size, $fontfile, $text) {
+        for( $c1 = ($x - abs($stroke_size)); $c1 <= ($x + abs($stroke_size)); $c1++ ) {
+            for($c2 = ($y - abs($stroke_size)); $c2 <= ($y + abs($stroke_size)); $c2++) {
+                $bg = imagettftext($image, $size, $angle, $c1, $c2, $strokecolor, $fontfile, $text);
+            }
+        }
+        return imagettftext($image, $size, $angle, $x, $y, $textcolor, $fontfile, $text);
+    }
+
     /**
      * Ensures $value is always within $min and $max range.
      *