Revert "Simplify Background::class manipulator"

Blending color is used only when outputting to image format which
do not support tranparency but the background color when specified
should be always used regardless of the output format.

This reverts commit bbf0976.

Author: ADmad

src/Manipulators/Background.php

@@ -5,6 +5,7 @@
 namespace League\Glide\Manipulators;
 
 use Intervention\Image\Interfaces\ImageInterface;
+use Intervention\Image\Origin;
 use League\Glide\Manipulators\Helpers\Color;
 
 class Background extends BaseManipulator
@@ -31,6 +32,11 @@ public function run(ImageInterface $image): ImageInterface
 
         $color = (new Color($bg))->formatted();
 
-        return $image->blendTransparency($color);
+        return $image->driver()->createImage($image->width(), $image->height())
+            ->fill($color)
+            ->place($image, 'top-left', 0, 0)
+            ->setOrigin(
+                new Origin($image->origin()->mediaType())
+            );
     }
 }

tests/Manipulators/BackgroundTest.php

@@ -4,18 +4,15 @@
 
 namespace League\Glide\Manipulators;
 
+use Intervention\Image\Interfaces\DriverInterface;
 use Intervention\Image\Interfaces\ImageInterface;
+use Intervention\Image\Origin;
 use PHPUnit\Framework\TestCase;
 
 class BackgroundTest extends TestCase
 {
     private $manipulator;
 
-    public function setUp(): void
-    {
-        $this->manipulator = new Background();
-    }
-
     public function tearDown(): void
     {
         \Mockery::close();
@@ -29,12 +26,27 @@ public function testCreateInstance()
     public function testRun()
     {
         $image = \Mockery::mock(ImageInterface::class, function ($mock) {
-            $mock->shouldReceive('blendTransparency')->with('rgba(0, 0, 0, 1)')->once();
+            $originMock = \Mockery::mock(Origin::class, ['mediaType' => 'image/jpeg']);
+
+            $mock->shouldReceive('width')->andReturn(100)->once();
+            $mock->shouldReceive('height')->andReturn(100)->once();
+            $mock->shouldReceive('origin')->andReturn($originMock)->once();
+
+            $mock->shouldReceive('driver')->andReturn(\Mockery::mock(DriverInterface::class, function ($mock) {
+                $mock->shouldReceive('createImage')->with(100, 100)->andReturn(\Mockery::mock(ImageInterface::class, function ($mock) {
+                    $mock->shouldReceive('fill')->with('rgba(0, 0, 0, 1)')->andReturn(\Mockery::mock(ImageInterface::class, function ($mock) {
+                        $mock->shouldReceive('setOrigin')->withArgs(function ($arg1) {
+                            return $arg1 instanceof Origin;
+                        })->andReturn($mock)->once();
+                        $mock->shouldReceive('place')->andReturn($mock)->once();
+                    }))->once();
+                }))->once();
+            }))->once();
         });
 
-        $this->assertInstanceOf(
-            ImageInterface::class,
-            $this->manipulator->setParams(['bg' => 'black'])->run($image)
-        );
+        $border = new Background();
+
+        $this->assertInstanceOf(ImageInterface::class, $border->run($image));
+        $this->assertInstanceOf(ImageInterface::class, $border->setParams(['bg' => 'black'])->run($image));
     }
 }