[4.0] Add WebP support to Image library

libraries/src/Image/Image.php

@@ -116,12 +116,13 @@ public function __construct($source = null)
 		}
 
 		// Determine which image types are supported by GD, but only once.
-		if (!isset(static::$formats[IMAGETYPE_JPEG]))
+		if (empty(static::$formats))
 		{
 			$info = gd_info();
-			static::$formats[IMAGETYPE_JPEG] = ($info['JPEG Support']) ? true : false;
-			static::$formats[IMAGETYPE_PNG] = ($info['PNG Support']) ? true : false;
-			static::$formats[IMAGETYPE_GIF] = ($info['GIF Read Support']) ? true : false;
+			static::$formats[IMAGETYPE_JPEG] = $info['JPEG Support'];
+			static::$formats[IMAGETYPE_PNG]  = $info['PNG Support'];
+			static::$formats[IMAGETYPE_GIF]  = $info['GIF Read Support'];
+			static::$formats[IMAGETYPE_WEBP] = $info['WebP Support'];
 		}
 
 		/**
@@ -630,6 +631,19 @@ public function loadFile($path)
 
 				break;
 
+			case 'image/webp':
+				// Make sure the image type is supported.
+				if (empty(static::$formats[IMAGETYPE_WEBP]))
+				{
+					throw new \RuntimeException('Attempting to load an image of unsupported type WebP.');
+				}
+
+				// Attempt to create the image handle.
+				$handle = imagecreatefromwebp($path);
+				$type = 'WebP';
+
+				break;
+
 			default:
 				throw new \InvalidArgumentException('Attempting to load an image of unsupported type ' . $properties->mime);
 		}
@@ -943,6 +957,10 @@ public function toFile($path, $type = IMAGETYPE_JPEG, array $options = [])
 			case IMAGETYPE_PNG:
 				return imagepng($this->getHandle(), $path, (\array_key_exists('quality', $options)) ? $options['quality'] : 0);
 				break;
+
+			case IMAGETYPE_WEBP:
+				return imagewebp($this->getHandle(), $path, (\array_key_exists('quality', $options)) ? $options['quality'] : 100);
+				break;
 		}
 
 		// Case IMAGETYPE_JPEG & default

tests/Unit/Libraries/Cms/Image/ImageTest.php

@@ -54,6 +54,8 @@ protected function setUp(): void
 		$this->testFilePng = __DIR__ . '/stubs/koala.png';
 
 		$this->testFileBmp = __DIR__ . '/stubs/koala.bmp';
+
+		$this->testFileWebp = __DIR__ . '/stubs/koala.webp';
 	}
 
 	/**
@@ -248,6 +250,33 @@ public function testloadFilePng()
 		$this->assertEquals($this->testFilePng, $image->getPath());
 	}
 
+	/**
+	 * Test the Joomla\CMS\Image\Image::loadFile method
+	 *
+	 * Makes sure WebP images are loaded correctly
+	 *
+	 * In this case we are taking the simple approach of loading an image file
+	 * and asserting that the dimensions are correct.
+	 *
+	 * @return  void
+	 *
+	 * @covers  Joomla\CMS\Image\Image::loadFile
+	 *
+	 * @since   __DEPLOY_VERSION__
+	 */
+	public function testloadFileWebp()
+	{
+		// Get a new Image inspector.
+		$image = new ImageInspector;
+		$image->loadFile($this->testFileWebp);
+
+		// Verify that the cropped image is the correct size.
+		$this->assertEquals(341, imagesy($image->getClassProperty('handle')));
+		$this->assertEquals(500, imagesx($image->getClassProperty('handle')));
+
+		$this->assertEquals($this->testFileWebp, $image->getPath());
+	}
+
 	/**
 	 * Test the Joomla\CMS\Image\Image::loadFile method
 	 *
@@ -534,6 +563,46 @@ public function testToFileJpg()
 		unlink($outFileJpg);
 	}
 
+	/**
+	 * Test the Joomla\CMS\Image\Image::toFile method
+	 *
+	 * Make sure that a new image is properly written to file.
+	 *
+	 * When performing this test using a lossy compression we are not able
+	 * to open and save the same image and then compare the checksums as the checksums
+	 * may have changed. Therefore we are limited to comparing the image properties.
+	 *
+	 * @return  void
+	 *
+	 * @covers  Joomla\CMS\Image\Image::toFile
+	 *
+	 * @since   __DEPLOY_VERSION__
+	 */
+	public function testToFileWebp()
+	{
+		$outFileWebp = __DIR__ . '/tmp/out.webp';
+
+		$image = new ImageInspector($this->testFile);
+		$image->toFile($outFileWebp, IMAGETYPE_WEBP);
+
+		$a = Image::getImageFileProperties($this->testFile);
+		$b = Image::getImageFileProperties($outFileWebp);
+
+		// Assert that properties that should be equal are equal.
+		$this->assertEquals($a->width, $b->width);
+		$this->assertEquals($a->height, $b->height);
+		$this->assertEquals($a->attributes, $b->attributes);
+		$this->assertEquals($a->bits, $b->bits);
+
+		// Assert that properties that should be different are different.
+		$this->assertEquals('image/webp', $b->mime);
+		$this->assertEquals(IMAGETYPE_WEBP, $b->type);
+		$this->assertNull($b->channels);
+
+		// Clean up after ourselves.
+		unlink($outFileWebp);
+	}
+
 	/**
 	 * Test the Joomla\CMS\Image\Image::toFile method
 	 *