X-Git-Url: https://git.mxchange.org/?a=blobdiff_plain;f=src%2FObject%2FImage.php;h=49196a0c44fe6b1e379210330d37f4965386b996;hb=a8402109b183e81dad4e5443883dd292df094b86;hp=866ac268fab4d95d0a0f905ef46a86ad9ca0eb13;hpb=b96daeeeef0cff461dc4d677d8594c198c62d507;p=friendica.git

diff --git a/src/Object/Image.php b/src/Object/Image.php
index 866ac268fa..49196a0c44 100644
--- a/src/Object/Image.php
+++ b/src/Object/Image.php
@@ -1,6 +1,6 @@
 <?php
 /**
- * @copyright Copyright (C) 2010-2022, the Friendica project
+ * @copyright Copyright (C) 2010-2023, the Friendica project
  *
  * @license GNU AGPL version 3 or any later version
  *
@@ -25,14 +25,17 @@ use Exception;
 use Friendica\DI;
 use Friendica\Util\Images;
 use Imagick;
+use ImagickDraw;
 use ImagickPixel;
+use GDImage;
+use kornrunner\Blurhash\Blurhash;
 
 /**
  * Class to handle images
  */
 class Image
 {
-	/** @var Imagick|resource */
+	/** @var GDImage|Imagick|resource */
 	private $image;
 
 	/*
@@ -62,7 +65,8 @@ class Image
 		}
 		$this->type = $type;
 
-		if ($this->isImagick() && $this->loadData($data)) {
+		if ($this->isImagick() && (empty($data) || $this->loadData($data))) {
+			$this->valid = !empty($data);
 			return;
 		} else {
 			// Failed to load with Imagick, fallback
@@ -155,12 +159,11 @@ class Image
 					$this->image->setCompressionQuality($quality);
 			}
 
-			// The 'width' and 'height' properties are only used by non-Imagick routines.
 			$this->width  = $this->image->getImageWidth();
 			$this->height = $this->image->getImageHeight();
-			$this->valid  = true;
+			$this->valid  = !empty($this->image);
 
-			return true;
+			return $this->valid;
 		}
 
 		$this->valid = false;
@@ -193,7 +196,7 @@ class Image
 	public function isValid(): bool
 	{
 		if ($this->isImagick()) {
-			return ($this->image !== false);
+			return !empty($this->image);
 		}
 		return $this->valid;
 	}
@@ -207,9 +210,6 @@ class Image
 			return false;
 		}
 
-		if ($this->isImagick()) {
-			return $this->image->getImageWidth();
-		}
 		return $this->width;
 	}
 
@@ -222,9 +222,6 @@ class Image
 			return false;
 		}
 
-		if ($this->isImagick()) {
-			return $this->image->getImageHeight();
-		}
 		return $this->height;
 	}
 
@@ -288,49 +285,13 @@ class Image
 		$width = $this->getWidth();
 		$height = $this->getHeight();
 
-		if ((! $width)|| (! $height)) {
-			return false;
-		}
-
-		if ($width > $max && $height > $max) {
-			// very tall image (greater than 16:9)
-			// constrain the width - let the height float.
-
-			if ((($height * 9) / 16) > $width) {
-				$dest_width = $max;
-				$dest_height = intval(($height * $max) / $width);
-			} elseif ($width > $height) {
-				// else constrain both dimensions
-				$dest_width = $max;
-				$dest_height = intval(($height * $max) / $width);
-			} else {
-				$dest_width = intval(($width * $max) / $height);
-				$dest_height = $max;
-			}
+		$scale = Images::getScalingDimensions($width, $height, $max);
+		if ($scale) {
+			return $this->scale($scale['width'], $scale['height']);
 		} else {
-			if ($width > $max) {
-				$dest_width = $max;
-				$dest_height = intval(($height * $max) / $width);
-			} else {
-				if ($height > $max) {
-					// very tall image (greater than 16:9)
-					// but width is OK - don't do anything
-
-					if ((($height * 9) / 16) > $width) {
-						$dest_width = $width;
-						$dest_height = $height;
-					} else {
-						$dest_width = intval(($width * $max) / $height);
-						$dest_height = $max;
-					}
-				} else {
-					$dest_width = $width;
-					$dest_height = $height;
-				}
-			}
+			return false;
 		}
 
-		return $this->scale($dest_width, $dest_height);
 	}
 
 	/**
@@ -350,6 +311,9 @@ class Image
 			do {
 				$this->image->rotateImage(new ImagickPixel(), -$degrees); // ImageMagick rotates in the opposite direction of imagerotate()
 			} while ($this->image->nextImage());
+
+			$this->width  = $this->image->getImageWidth();
+			$this->height = $this->image->getImageHeight();
 			return;
 		}
 
@@ -414,13 +378,13 @@ class Image
 			$orientation = $this->image->getImageOrientation();
 			switch ($orientation) {
 				case Imagick::ORIENTATION_BOTTOMRIGHT:
-					$this->image->rotateimage("#000", 180);
+					$this->rotate(180);
 					break;
 				case Imagick::ORIENTATION_RIGHTTOP:
-					$this->image->rotateimage("#000", 90);
+					$this->rotate(-90);
 					break;
 				case Imagick::ORIENTATION_LEFTBOTTOM:
-					$this->image->rotateimage("#000", -90);
+					$this->rotate(90);
 					break;
 			}
 
@@ -573,7 +537,6 @@ class Image
 				}
 			} while ($this->image->nextImage());
 
-			// These may not be necessary anymore
 			$this->width  = $this->image->getImageWidth();
 			$this->height = $this->image->getImageHeight();
 		} else {
@@ -656,7 +619,7 @@ class Image
 		if ($this->image) {
 			imagedestroy($this->image);
 		}
-		$this->image = $dest;
+		$this->image  = $dest;
 		$this->width  = imagesx($this->image);
 		$this->height = imagesy($this->image);
 
@@ -695,14 +658,13 @@ class Image
 			try {
 				/* Clean it */
 				$this->image = $this->image->deconstructImages();
-				$string = $this->image->getImagesBlob();
-				return $string;
+				return $this->image->getImagesBlob();
 			} catch (Exception $e) {
 				return false;
 			}
 		}
 
-		ob_start();
+		$stream = fopen('php://memory','r+');
 
 		// Enable interlacing
 		imageinterlace($this->image, true);
@@ -710,18 +672,116 @@ class Image
 		switch ($this->getType()) {
 			case 'image/png':
 				$quality = DI::config()->get('system', 'png_quality');
-				imagepng($this->image, null, $quality);
+				imagepng($this->image, $stream, $quality);
 				break;
 
 			case 'image/jpeg':
 			case 'image/jpg':
 				$quality = DI::config()->get('system', 'jpeg_quality');
-				imagejpeg($this->image, null, $quality);
+				imagejpeg($this->image, $stream, $quality);
 				break;
 		}
-		$string = ob_get_contents();
-		ob_end_clean();
+		rewind($stream);
+		return stream_get_contents($stream);
+	}
+
+	/**
+	 * Create a blurhash out of a given image string
+	 *
+	 * @param string $img_str
+	 * @return string
+	 */
+	public function getBlurHash(): string
+	{
+		$image = New Image($this->asString());
+		if (empty($image) || !$this->isValid()) {
+			return '';
+		}
+
+		$width  = $image->getWidth();
+		$height = $image->getHeight();
+
+		if (max($width, $height) > 90) {
+			$image->scaleDown(90);
+			$width  = $image->getWidth();
+			$height = $image->getHeight();
+		}
+
+		if (empty($width) || empty($height)) {
+			return '';
+		}
+
+		$pixels = [];
+		for ($y = 0; $y < $height; ++$y) {
+			$row = [];
+			for ($x = 0; $x < $width; ++$x) {
+				if ($image->isImagick()) {
+					try {
+						$colors = $image->image->getImagePixelColor($x, $y)->getColor();
+					} catch (\Exception $exception) {
+						return '';
+					}
+					$row[] = [$colors['r'], $colors['g'], $colors['b']];
+				} else {
+					$index = imagecolorat($image->image, $x, $y);
+					$colors = @imagecolorsforindex($image->image, $index);
+					$row[] = [$colors['red'], $colors['green'], $colors['blue']];
+				}
+			}
+			$pixels[] = $row;
+		}
+
+		// The components define the amount of details (1 to 9).
+		$components_x = 9;
+		$components_y = 9;
+
+		return Blurhash::encode($pixels, $components_x, $components_y);
+	}
+
+	/**
+	 * Create an image out of a blurhash
+	 *
+	 * @param string $blurhash
+	 * @param integer $width
+	 * @param integer $height
+	 * @return void
+	 */
+	public function getFromBlurHash(string $blurhash, int $width, int $height)
+	{
+		$scaled = Images::getScalingDimensions($width, $height, 90);
+		$pixels = Blurhash::decode($blurhash, $scaled['width'], $scaled['height']);
+
+		if ($this->isImagick()) {
+			$this->image = new Imagick();
+			$draw  = new ImagickDraw();
+			$this->image->newImage($scaled['width'], $scaled['height'], '', 'png');
+		} else {
+			$this->image = imagecreatetruecolor($scaled['width'], $scaled['height']);
+		}
+
+		for ($y = 0; $y < $scaled['height']; ++$y) {
+			for ($x = 0; $x < $scaled['width']; ++$x) {
+				[$r, $g, $b] = $pixels[$y][$x];
+				if ($this->isImagick()) {
+					$draw->setFillColor("rgb($r, $g, $b)");
+					$draw->point($x, $y);
+				} else {
+					imagesetpixel($this->image, $x, $y, imagecolorallocate($this->image, $r, $g, $b));
+				}
+			}
+		}
+
+		if ($this->isImagick()) {
+			$this->image->drawImage($draw);
+			$this->width  = $this->image->getImageWidth();
+			$this->height = $this->image->getImageHeight();
+		} else {
+			$this->width  = imagesx($this->image);
+			$this->height = imagesy($this->image);
+		}
+
+		$this->valid = !empty($this->image);
 
-		return $string;
+		$this->scaleUp(min($width, $height));
 	}
 }