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2022-10-06 22:04:13 +02:00
commit 4bc486fd92
487 changed files with 19040 additions and 0 deletions
@@ -0,0 +1,98 @@
+<?php
+
+/*
+	Various functions regarding thumbnail creation and color extraction
+*/
+
+require_once( 'lib/config.php' );
+
+class Image {
+	
+	public static function createThumb( $imgPath, $thumbPath, $thumbWidth, $thumbHeight ) {
+		list( $srcWidth, $srcHeight, $type ) = getimagesize( $imgPath );
+		$srcX = 0;
+		$srcY = 0;
+		if( 
+			$srcWidth < 1 || $srcWidth > 10000
+			|| $srcHeight < 1 || $srcHeight > 10000
+		) {
+			return false;
+		}
+		
+		if( $type == IMAGETYPE_JPEG ) {
+			$imgcreate = 'ImageCreateFromJPEG';
+		} else if( $type == IMAGETYPE_GIF ) {
+			$imgcreate = 'ImageCreateFromGIF';
+		} else if( $type == IMAGETYPE_PNG ) {
+			$imgcreate = 'ImageCreateFromPNG';
+		} else {
+			return false;
+		}
+		
+		$thumbDirName = dirname( $thumbPath );
+
+		if( ( $srcWidth/$srcHeight ) > ( $thumbWidth/$thumbHeight ) ) {
+			$zoom = ($srcWidth/$srcHeight) / ($thumbWidth/$thumbHeight);
+			$srcX = ($srcWidth - $srcWidth / $zoom) / 2;
+			$srcWidth = $srcWidth / $zoom;
+		}
+		else {
+			$zoom = ($thumbWidth/$thumbHeight) / ($srcWidth/$srcHeight);
+			$srcY = ($srcHeight - $srcHeight / $zoom) / 2;
+			$srcHeight = $srcHeight / $zoom;
+		}
+		
+		$thumb = Imagecreatetruecolor( $thumbWidth, $thumbHeight );
+		$orig = $imgcreate( $imgPath );
+		Imagecopyresampled($thumb, $orig, 0, 0, $srcX, $srcY, $thumbWidth, $thumbHeight, $srcWidth, $srcHeight);
+		
+		if( Config::$images['sharpen'] && function_exists('imageconvolution') ) {
+			$sharpenMatrix = array( array(-1,-1,-1), array(-1,16,-1), array(-1,-1,-1) );
+			imageconvolution($thumb, $sharpenMatrix, 8, 0);
+		}
+		imagejpeg( $thumb, $thumbPath, Config::$images['jpegQuality'] );
+
+		// clean up
+		Imagedestroy( $thumb );
+		Imagedestroy( $orig );
+			
+		return true;
+	}
+	
+	public static function getColors( $imgPath, $size ) {
+		list( $srcWidth, $srcHeight, $type ) = getimagesize( $imgPath );
+		
+		if( $type == IMAGETYPE_JPEG ) {
+			$imgcreate = 'ImageCreateFromJPEG';
+		} else if( $type == IMAGETYPE_GIF ) {
+			$imgcreate = 'ImageCreateFromGIF';
+		} else if( $type == IMAGETYPE_PNG ) {
+			$imgcreate = 'ImageCreateFromPNG';
+		} else {
+			return array();
+		}
+
+		$orig = $imgcreate( $imgPath );
+	
+		$thumb = Imagecreatetruecolor( $size, $size );
+		Imagecopyresampled($thumb, $orig, 0, 0, 0, 0, $size, $size, $srcWidth, $srcHeight);
+		
+		$colors = array();
+		for( $x = 0; $x < $size; $x++ ) {
+			for( $y = 0; $y < $size; $y++ ) {
+				$rgb = ImageColorAt($thumb, $x, $y);
+				$r = ($rgb >> 16) & 0xFF;
+				$g = ($rgb >> 8) & 0xFF;
+				$b = $rgb & 0xFF;
+				$colors[] = array( 
+					'r' => $r, 
+					'g' => $g, 
+					'b' => $b
+				);
+			}
+		}
+		return $colors;
+	}
+}
+
+?>