Add blur option

Author: chadicus

src/Image.php

@@ -2,6 +2,8 @@
 
 namespace TraderInteractive\Util;
 
+use TraderInteractive\Util;
+
 final class Image
 {
     /**
@@ -214,12 +216,7 @@ public static function resizeMulti(\Imagick $source, array $boxSizes, array $opt
             }
 
             //put image in box
-            $canvas = new \Imagick();
-            if ($canvas->newImage($boxWidth, $boxHeight, $color) !== true) {
-                //cumbersome to test
-                throw new \Exception('Imagick::newImage() did not return true');//@codeCoverageIgnore
-            }
-
+            $canvas = self::getBackgroundCanvas($clone, $color, $boxWidth, $boxHeight);
             if ($canvas->compositeImage($clone, \Imagick::COMPOSITE_ATOP, $targetX, $targetY) !== true) {
                 //cumbersome to test
                 throw new \Exception('Imagick::compositeImage() did not return true');//@codeCoverageIgnore
@@ -234,6 +231,21 @@ public static function resizeMulti(\Imagick $source, array $boxSizes, array $opt
         return $results;
     }
 
+    private static function getBackgroundCanvas(\Imagick $source, string $color, int $boxWidth, $boxHeight)
+    {
+        if ($color === 'blur') {
+            $canvas = new \Imagick();
+            $canvas->readImageBlob($source->getImageBlob());
+            $canvas->resizeImage($boxWidth, $boxHeight, \Imagick::FILTER_BOX, 15.0, false);
+            return $canvas;
+        }
+
+        $canvas = new \Imagick();
+        $imageCreated = $canvas->newImage($boxWidth, $boxHeight, $color);
+        Util::ensure(true, $imageCreated, 'Imagick::newImage() did not return true');
+        return $canvas;
+    }
+
     /**
      * write $source to $destPath with $options applied
      *

tests/ImageTest.php

@@ -230,6 +230,23 @@ public function resizeWithUpsizeAndBestFit()
         $this->assertSame('srgb(255,255,255)', $bestFit->getImagePixelColor(299, 100)->getColorAsString());
     }
 
+    /**
+     * @test
+     * @covers ::resize
+     * @covers ::resizeMulti
+     */
+    public function resizeWithBurredBackground()
+    {
+        $source = new \Imagick();
+        $source->readImage(__DIR__ . '/_files/portrait.jpg');
+        $actual = Image::resize($source, 1024, 768, ['upsize' => true, 'bestfit' => false, 'color' => 'blur']);
+
+        $expected = new \Imagick();
+        $expected->readImage(__DIR__ . '/_files/blur.jpg');
+        $comparison = $expected->compareImages($actual, \Imagick::METRIC_UNDEFINED);
+        $this->assertGreaterThanOrEqual(.999, $comparison[1]);
+    }
+
     /**
      * @test
      * @covers ::resize