Fix gradient pattern generation for Imagick renderer. Fixes #79

src/Renderer/Image/ImagickImageBackEnd.php

@@ -227,10 +227,7 @@ private function drawPath(Path $path) : void
 
     private function createGradientFill(Gradient $gradient, float $x, float $y, float $width, float $height) : string
     {
-        list($width, $height) = $this->matrices[$this->matrixIndex]->apply($x + $width, $y + $height);
-        list($x, $y) = $this->matrices[$this->matrixIndex]->apply($x, $y);
-        $width -= $x;
-        $height -= $y;
+        list($width, $height) = $this->matrices[$this->matrixIndex]->apply($width, $height);
 
         $startColor = $this->getColorPixel($gradient->getStartColor())->getColorAsString();
         $endColor = $this->getColorPixel($gradient->getEndColor())->getColorAsString();
@@ -290,8 +287,8 @@ private function createGradientFill(Gradient $gradient, float $x, float $y, floa
         }
 
         $id = sprintf('g%d', ++$this->gradientCount);
-        $this->draw->pushPattern($id, 0, 0, $x + $width, $y + $height);
-        $this->draw->composite(Imagick::COMPOSITE_COPY, $x, $y, $width, $height, $gradientImage);
+        $this->draw->pushPattern($id, 0, 0, $width, $height);
+        $this->draw->composite(Imagick::COMPOSITE_COPY, 0, 0, $width, $height, $gradientImage);
         $this->draw->popPattern();
         return $id;
     }

test/Integration/ImagickRenderingTest.php

@@ -3,8 +3,15 @@
 
 namespace BaconQrCodeTest\Integration;
 
+use BaconQrCode\Renderer\Color\Rgb;
+use BaconQrCode\Renderer\Eye\SquareEye;
 use BaconQrCode\Renderer\Image\ImagickImageBackEnd;
 use BaconQrCode\Renderer\ImageRenderer;
+use BaconQrCode\Renderer\Module\SquareModule;
+use BaconQrCode\Renderer\RendererStyle\EyeFill;
+use BaconQrCode\Renderer\RendererStyle\Fill;
+use BaconQrCode\Renderer\RendererStyle\Gradient;
+use BaconQrCode\Renderer\RendererStyle\GradientType;
 use BaconQrCode\Renderer\RendererStyle\RendererStyle;
 use BaconQrCode\Writer;
 use PHPUnit\Framework\TestCase;
@@ -27,4 +34,30 @@ public function testGenericQrCode() : void
         $this->assertMatchesFileSnapshot($tempName);
         unlink($tempName);
     }
+
+    public function testIssue79() : void
+    {
+        $eye = SquareEye::instance();
+        $squareModule = SquareModule::instance();
+
+        $eyeFill = new EyeFill(new Rgb(100, 100, 55), new Rgb(100, 100, 255));
+        $gradient = new Gradient(new Rgb(100, 100, 55), new Rgb(100, 100, 255), GradientType::HORIZONTAL());
+
+        $renderer = new ImageRenderer(
+            new RendererStyle(
+                400,
+                2,
+                $squareModule,
+                $eye,
+                Fill::withForegroundGradient(new Rgb(255, 255, 255), $gradient, $eyeFill, $eyeFill, $eyeFill)
+            ),
+            new ImagickImageBackEnd()
+        );
+        $writer = new Writer($renderer);
+        $tempName = tempnam(sys_get_temp_dir(), 'test') . '.png';
+        $writer->writeFile('https://apiroad.net/very-long-url', $tempName);
+
+        $this->assertMatchesFileSnapshot($tempName);
+        unlink($tempName);
+    }
 }