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SimpleImage.php
Содержимое
<?php /** * @package SimpleImage class * @version 2.6.0 * @author Cory LaViska for A Beautiful Site, LLC (http://www.abeautifulsite.net/) * @author Nazar Mokrynskyi <nazar@mokrynskyi.com> - merging of forks, namespace support, PhpDoc editing, adaptive_resize() method, other fixes * @license This software is licensed under the MIT license: http://opensource.org/licenses/MIT * @copyright A Beautiful Site, LLC * */ namespace abeautifulsite; use Exception; /** * Class SimpleImage * This class makes image manipulation in PHP as simple as possible. * @package SimpleImage * */ class SimpleImage { /** * @var int Default output image quality * */ public $quality = 80; protected $image, $filename, $original_info, $width, $height, $imagestring; /** * Create instance and load an image, or create an image from scratch * * @param null|string $filename Path to image file (may be omitted to create image from scratch) * @param int $width Image width (is used for creating image from scratch) * @param int|null $height If omitted - assumed equal to $width (is used for creating image from scratch) * @param null|string $color Hex color string, array(red, green, blue) or array(red, green, blue, alpha). * Where red, green, blue - integers 0-255, alpha - integer 0-127<br> * (is used for creating image from scratch) * * @return SimpleImage * @throws Exception * */ function __construct($filename = null, $width = null, $height = null, $color = null) { if ($filename) { $this->load($filename); } elseif ($width) { $this->create($width, $height, $color); } return $this; } /** * Destroy image resource * */ function __destruct() { if( $this->image !== null && get_resource_type($this->image) === 'gd' ) { imagedestroy($this->image); } } /** * Adaptive resize * * This function has been deprecated and will be removed in an upcoming release. Please * update your code to use the `thumbnail()` method instead. The arguments for both * methods are exactly the same. * * @param int $width * @param int|null $height If omitted - assumed equal to $width * * @return SimpleImage * */ function adaptive_resize($width, $height = null) { return $this->thumbnail($width, $height); } /** * Rotates and/or flips an image automatically so the orientation will be correct (based on exif 'Orientation') * * @return SimpleImage * */ function auto_orient() { if(isset($this->original_info['exif']['Orientation'])) { switch ($this->original_info['exif']['Orientation']) { case 1: // Do nothing break; case 2: // Flip horizontal $this->flip('x'); break; case 3: // Rotate 180 counterclockwise $this->rotate(-180); break; case 4: // vertical flip $this->flip('y'); break; case 5: // Rotate 90 clockwise and flip vertically $this->flip('y'); $this->rotate(90); break; case 6: // Rotate 90 clockwise $this->rotate(90); break; case 7: // Rotate 90 clockwise and flip horizontally $this->flip('x'); $this->rotate(90); break; case 8: // Rotate 90 counterclockwise $this->rotate(-90); break; } } return $this; } /** * Best fit (proportionally resize to fit in specified width/height) * * Shrink the image proportionally to fit inside a $width x $height box * * @param int $max_width * @param int $max_height * * @return SimpleImage * */ function best_fit($max_width, $max_height) { // If it already fits, there's nothing to do if ($this->width <= $max_width && $this->height <= $max_height) { return $this; } // Determine aspect ratio $aspect_ratio = $this->height / $this->width; // Make width fit into new dimensions if ($this->width > $max_width) { $width = $max_width; $height = $width * $aspect_ratio; } else { $width = $this->width; $height = $this->height; } // Make height fit into new dimensions if ($height > $max_height) { $height = $max_height; $width = $height / $aspect_ratio; } return $this->resize($width, $height); } /** * Blur * * @param string $type selective|gaussian * @param int $passes Number of times to apply the filter * * @return SimpleImage * */ function blur($type = 'selective', $passes = 1) { switch (strtolower($type)) { case 'gaussian': $type = IMG_FILTER_GAUSSIAN_BLUR; break; default: $type = IMG_FILTER_SELECTIVE_BLUR; break; } for ($i = 0; $i < $passes; $i++) { imagefilter($this->image, $type); } return $this; } /** * Brightness * * @param int $level Darkest = -255, lightest = 255 * * @return SimpleImage * */ function brightness($level) { imagefilter($this->image, IMG_FILTER_BRIGHTNESS, $this->keep_within($level, -255, 255)); return $this; } /** * Contrast * * @param int $level Min = -100, max = 100 * * @return SimpleImage * * */ function contrast($level) { imagefilter($this->image, IMG_FILTER_CONTRAST, $this->keep_within($level, -100, 100)); return $this; } /** * Colorize * * @param string $color Hex color string, array(red, green, blue) or array(red, green, blue, alpha). * Where red, green, blue - integers 0-255, alpha - integer 0-127 * @param float|int $opacity 0-1 * * @return SimpleImage * */ function colorize($color, $opacity) { $rgba = $this->normalize_color($color); $alpha = $this->keep_within(127 - (127 * $opacity), 0, 127); imagefilter($this->image, IMG_FILTER_COLORIZE, $this->keep_within($rgba['r'], 0, 255), $this->keep_within($rgba['g'], 0, 255), $this->keep_within($rgba['b'], 0, 255), $alpha); return $this; } /** * Create an image from scratch * * @param int $width Image width * @param int|null $height If omitted - assumed equal to $width * @param null|string $color Hex color string, array(red, green, blue) or array(red, green, blue, alpha). * Where red, green, blue - integers 0-255, alpha - integer 0-127 * * @return SimpleImage * */ function create($width, $height = null, $color = null) { $height = $height ?: $width; $this->width = $width; $this->height = $height; $this->image = imagecreatetruecolor($width, $height); $this->original_info = array( 'width' => $width, 'height' => $height, 'orientation' => $this->get_orientation(), 'exif' => null, 'format' => 'png', 'mime' => 'image/png' ); if ($color) { $this->fill($color); } return $this; } /** * Crop an image * * @param int $x1 Left * @param int $y1 Top * @param int $x2 Right * @param int $y2 Bottom * * @return SimpleImage * */ function crop($x1, $y1, $x2, $y2) { // Determine crop size if ($x2 < $x1) { list($x1, $x2) = array($x2, $x1); } if ($y2 < $y1) { list($y1, $y2) = array($y2, $y1); } $crop_width = $x2 - $x1; $crop_height = $y2 - $y1; // Perform crop $new = imagecreatetruecolor($crop_width, $crop_height); imagealphablending($new, false); imagesavealpha($new, true); imagecopyresampled($new, $this->image, 0, 0, $x1, $y1, $crop_width, $crop_height, $crop_width, $crop_height); // Update meta data $this->width = $crop_width; $this->height = $crop_height; $this->image = $new; return $this; } /** * Desaturate * * @param int $percentage Level of desaturization. * * @return SimpleImage * */ function desaturate($percentage = 100) { // Determine percentage $percentage = $this->keep_within($percentage, 0, 100); if( $percentage === 100 ) { imagefilter($this->image, IMG_FILTER_GRAYSCALE); } else { // Make a desaturated copy of the image $new = imagecreatetruecolor($this->width, $this->height); imagealphablending($new, false); imagesavealpha($new, true); imagecopy($new, $this->image, 0, 0, 0, 0, $this->width, $this->height); imagefilter($new, IMG_FILTER_GRAYSCALE); // Merge with specified percentage $this->imagecopymerge_alpha($this->image, $new, 0, 0, 0, 0, $this->width, $this->height, $percentage); imagedestroy($new); } return $this; } /** * Edge Detect * * @return SimpleImage * */ function edges() { imagefilter($this->image, IMG_FILTER_EDGEDETECT); return $this; } /** * Emboss * * @return SimpleImage * */ function emboss() { imagefilter($this->image, IMG_FILTER_EMBOSS); return $this; } /** * Fill image with color * * @param string $color Hex color string, array(red, green, blue) or array(red, green, blue, alpha). * Where red, green, blue - integers 0-255, alpha - integer 0-127 * * @return SimpleImage * */ function fill($color = '#000000') { $rgba = $this->normalize_color($color); $fill_color = imagecolorallocatealpha($this->image, $rgba['r'], $rgba['g'], $rgba['b'], $rgba['a']); imagealphablending($this->image, false); imagesavealpha($this->image, true); imagefilledrectangle($this->image, 0, 0, $this->width, $this->height, $fill_color); return $this; } /** * Fit to height (proportionally resize to specified height) * * @param int $height * * @return SimpleImage * */ function fit_to_height($height) { $aspect_ratio = $this->height / $this->width; $width = $height / $aspect_ratio; return $this->resize($width, $height); } /** * Fit to width (proportionally resize to specified width) * * @param int $width * * @return SimpleImage * */ function fit_to_width($width) { $aspect_ratio = $this->height / $this->width; $height = $width * $aspect_ratio; return $this->resize($width, $height); } /** * Flip an image horizontally or vertically * * @param string $direction x|y * * @return SimpleImage * */ function flip($direction) { $new = imagecreatetruecolor($this->width, $this->height); imagealphablending($new, false); imagesavealpha($new, true); switch (strtolower($direction)) { case 'y': for ($y = 0; $y < $this->height; $y++) { imagecopy($new, $this->image, 0, $y, 0, $this->height - $y - 1, $this->width, 1); } break; default: for ($x = 0; $x < $this->width; $x++) { imagecopy($new, $this->image, $x, 0, $this->width - $x - 1, 0, 1, $this->height); } break; } $this->image = $new; return $this; } /** * Get the current height * * @return int * */ function get_height() { return $this->height; } /** * Get the current orientation * * @return string portrait|landscape|square * */ function get_orientation() { if (imagesx($this->image) > imagesy($this->image)) { return 'landscape'; } if (imagesx($this->image) < imagesy($this->image)) { return 'portrait'; } return 'square'; } /** * Get info about the original image * * @return array <pre> array( * width => 320, * height => 200, * orientation => ['portrait', 'landscape', 'square'], * exif => array(...), * mime => ['image/jpeg', 'image/gif', 'image/png'], * format => ['jpeg', 'gif', 'png'] * )</pre> * */ function get_original_info() { return $this->original_info; } /** * Get the current width * * @return int * */ function get_width() { return $this->width; } /** * Invert * * @return SimpleImage * */ function invert() { imagefilter($this->image, IMG_FILTER_NEGATE); return $this; } /** * Load an image * * @param string $filename Path to image file * * @return SimpleImage * @throws Exception * */ function load($filename) { // Require GD library if (!extension_loaded('gd')) { throw new Exception('Required extension GD is not loaded.'); } $this->filename = $filename; return $this->get_meta_data(); } /** * Load a base64 string as image * * @param string $filename base64 string * * @return SimpleImage * */ function load_base64($base64string) { if (!extension_loaded('gd')) { throw new Exception('Required extension GD is not loaded.'); } //remove data URI scheme and spaces from base64 string then decode it $this->imagestring = base64_decode(str_replace(' ', '+',preg_replace('#^data:image/[^;]+;base64,#', '', $base64string))); $this->image = imagecreatefromstring($this->imagestring); return $this->get_meta_data(); } /** * Mean Remove * * @return SimpleImage * */ function mean_remove() { imagefilter($this->image, IMG_FILTER_MEAN_REMOVAL); return $this; } /** * Changes the opacity level of the image * * @param float|int $opacity 0-1 * * @throws Exception * */ function opacity($opacity) { // Determine opacity $opacity = $this->keep_within($opacity, 0, 1) * 100; // Make a copy of the image $copy = imagecreatetruecolor($this->width, $this->height); imagealphablending($copy, false); imagesavealpha($copy, true); imagecopy($copy, $this->image, 0, 0, 0, 0, $this->width, $this->height); // Create transparent layer $this->create($this->width, $this->height, array(0, 0, 0, 127)); // Merge with specified opacity $this->imagecopymerge_alpha($this->image, $copy, 0, 0, 0, 0, $this->width, $this->height, $opacity); imagedestroy($copy); return $this; } /** * Outputs image without saving * * @param null|string $format If omitted or null - format of original file will be used, may be gif|jpg|png * @param int|null $quality Output image quality in percents 0-100 * * @throws Exception * */ function output($format = null, $quality = null) { // Determine quality $quality = $quality ?: $this->quality; // Determine mimetype switch (strtolower($format)) { case 'gif': $mimetype = 'image/gif'; break; case 'jpeg': case 'jpg': imageinterlace($this->image, true); $mimetype = 'image/jpeg'; break; case 'png': $mimetype = 'image/png'; break; default: $info = (empty($this->imagestring)) ? getimagesize($this->filename) : getimagesizefromstring($this->imagestring); $mimetype = $info['mime']; unset($info); break; } // Output the image header('Content-Type: '.$mimetype); switch ($mimetype) { case 'image/gif': imagegif($this->image); break; case 'image/jpeg': imageinterlace($this->image, true); imagejpeg($this->image, null, round($quality)); break; case 'image/png': imagepng($this->image, null, round(9 * $quality / 100)); break; default: throw new Exception('Unsupported image format: '.$this->filename); break; } } /** * Outputs image as data base64 to use as img src * * @param null|string $format If omitted or null - format of original file will be used, may be gif|jpg|png * @param int|null $quality Output image quality in percents 0-100 * * @return string * @throws Exception * */ function output_base64($format = null, $quality = null) { // Determine quality $quality = $quality ?: $this->quality; // Determine mimetype switch (strtolower($format)) { case 'gif': $mimetype = 'image/gif'; break; case 'jpeg': case 'jpg': imageinterlace($this->image, true); $mimetype = 'image/jpeg'; break; case 'png': $mimetype = 'image/png'; break; default: $info = getimagesize($this->filename); $mimetype = $info['mime']; unset($info); break; } // Output the image ob_start(); switch ($mimetype) { case 'image/gif': imagegif($this->image); break; case 'image/jpeg': imagejpeg($this->image, null, round($quality)); break; case 'image/png': imagepng($this->image, null, round(9 * $quality / 100)); break; default: throw new Exception('Unsupported image format: '.$this->filename); break; } $image_data = ob_get_contents(); ob_end_clean(); // Returns formatted string for img src return 'data:'.$mimetype.';base64,'.base64_encode($image_data); } /** * Overlay * * Overlay an image on top of another, works with 24-bit PNG alpha-transparency * * @param string $overlay An image filename or a SimpleImage object * @param string $position center|top|left|bottom|right|top left|top right|bottom left|bottom right * @param float|int $opacity Overlay opacity 0-1 * @param int $x_offset Horizontal offset in pixels * @param int $y_offset Vertical offset in pixels * * @return SimpleImage * */ function overlay($overlay, $position = 'center', $opacity = 1, $x_offset = 0, $y_offset = 0) { // Load overlay image if( !($overlay instanceof SimpleImage) ) { $overlay = new SimpleImage($overlay); } // Convert opacity $opacity = $opacity * 100; // Determine position switch (strtolower($position)) { case 'top left': $x = 0 + $x_offset; $y = 0 + $y_offset; break; case 'top right': $x = $this->width - $overlay->width + $x_offset; $y = 0 + $y_offset; break; case 'top': $x = ($this->width / 2) - ($overlay->width / 2) + $x_offset; $y = 0 + $y_offset; break; case 'bottom left': $x = 0 + $x_offset; $y = $this->height - $overlay->height + $y_offset; break; case 'bottom right': $x = $this->width - $overlay->width + $x_offset; $y = $this->height - $overlay->height + $y_offset; break; case 'bottom': $x = ($this->width / 2) - ($overlay->width / 2) + $x_offset; $y = $this->height - $overlay->height + $y_offset; break; case 'left': $x = 0 + $x_offset; $y = ($this->height / 2) - ($overlay->height / 2) + $y_offset; break; case 'right': $x = $this->width - $overlay->width + $x_offset; $y = ($this->height / 2) - ($overlay->height / 2) + $y_offset; break; case 'center': default: $x = ($this->width / 2) - ($overlay->width / 2) + $x_offset; $y = ($this->height / 2) - ($overlay->height / 2) + $y_offset; break; } // Perform the overlay $this->imagecopymerge_alpha($this->image, $overlay->image, $x, $y, 0, 0, $overlay->width, $overlay->height, $opacity); return $this; } /** * Pixelate * * @param int $block_size Size in pixels of each resulting block * * @return SimpleImage * */ function pixelate($block_size = 10) { imagefilter($this->image, IMG_FILTER_PIXELATE, $block_size, true); return $this; } /** * Resize an image to the specified dimensions * * @param int $width * @param int $height * * @return SimpleImage * */ function resize($width, $height) { // Generate new GD image $new = imagecreatetruecolor($width, $height); if( $this->original_info['format'] === 'gif' ) { // Preserve transparency in GIFs $transparent_index = imagecolortransparent($this->image); $palletsize = imagecolorstotal($this->image); if ($transparent_index >= 0 && $transparent_index < $palletsize) { $transparent_color = imagecolorsforindex($this->image, $transparent_index); $transparent_index = imagecolorallocate($new, $transparent_color['red'], $transparent_color['green'], $transparent_color['blue']); imagefill($new, 0, 0, $transparent_index); imagecolortransparent($new, $transparent_index); } } else { // Preserve transparency in PNGs (benign for JPEGs) imagealphablending($new, false); imagesavealpha($new, true); } // Resize imagecopyresampled($new, $this->image, 0, 0, 0, 0, $width, $height, $this->width, $this->height); // Update meta data $this->width = $width; $this->height = $height; $this->image = $new; return $this; } /** * Rotate an image * * @param int $angle 0-360 * @param string $bg_color Hex color string, array(red, green, blue) or array(red, green, blue, alpha). * Where red, green, blue - integers 0-255, alpha - integer 0-127 * * @return SimpleImage * */ function rotate($angle, $bg_color = '#000000') { // Perform the rotation $rgba = $this->normalize_color($bg_color); $bg_color = imagecolorallocatealpha($this->image, $rgba['r'], $rgba['g'], $rgba['b'], $rgba['a']); $new = imagerotate($this->image, -($this->keep_within($angle, -360, 360)), $bg_color); imagesavealpha($new, true); imagealphablending($new, true); // Update meta data $this->width = imagesx($new); $this->height = imagesy($new); $this->image = $new; return $this; } /** * Save an image * * The resulting format will be determined by the file extension. * * @param null|string $filename If omitted - original file will be overwritten * @param null|int $quality Output image quality in percents 0-100 * @param null|string $format The format to use; determined by file extension if null * * @return SimpleImage * @throws Exception * */ function save($filename = null, $quality = null, $format = null) { // Determine quality, filename, and format $quality = $quality ?: $this->quality; $filename = $filename ?: $this->filename; if( !$format ) { $format = $this->file_ext($filename) ?: $this->original_info['format']; } // Create the image switch (strtolower($format)) { case 'gif': $result = imagegif($this->image, $filename); break; case 'jpg': case 'jpeg': imageinterlace($this->image, true); $result = imagejpeg($this->image, $filename, round($quality)); break; case 'png': $result = imagepng($this->image, $filename, round(9 * $quality / 100)); break; default: throw new Exception('Unsupported format'); } if (!$result) { throw new Exception('Unable to save image: ' . $filename); } return $this; } /** * Sepia * * @return SimpleImage * */ function sepia() { imagefilter($this->image, IMG_FILTER_GRAYSCALE); imagefilter($this->image, IMG_FILTER_COLORIZE, 100, 50, 0); return $this; } /** * Sketch * * @return SimpleImage * */ function sketch() { imagefilter($this->image, IMG_FILTER_MEAN_REMOVAL); return $this; } /** * Smooth * * @param int $level Min = -10, max = 10 * * @return SimpleImage * */ function smooth($level) { imagefilter($this->image, IMG_FILTER_SMOOTH, $this->keep_within($level, -10, 10)); return $this; } /** * Add text to an image * * @param string $text * @param string $font_file * @param float|int $font_size * @param string|array $color * @param string $position * @param int $x_offset * @param int $y_offset * @param string|array $stroke_color * @param string $stroke_size * @param string $alignment * @param int $letter_spacing * * @return SimpleImage * @throws Exception * */ function text($text, $font_file, $font_size = 12, $color = '#000000', $position = 'center', $x_offset = 0, $y_offset = 0, $stroke_color = null, $stroke_size = null, $alignment = null, $letter_spacing = 0) { // todo - this method could be improved to support the text angle $angle = 0; // Determine text color if(is_array($color)) { foreach($color as $var) { $rgba = $this->normalize_color($var); $color_arr[] = imagecolorallocatealpha($this->image, $rgba['r'], $rgba['g'], $rgba['b'], $rgba['a']); } } else { $rgba = $this->normalize_color($color); $color_arr[] = imagecolorallocatealpha($this->image, $rgba['r'], $rgba['g'], $rgba['b'], $rgba['a']); } // Determine textbox size $box = imagettfbbox($font_size, $angle, $font_file, $text); if (!$box) { throw new Exception('Unable to load font: '.$font_file); } $box_width = abs($box[6] - $box[2]); $box_height = abs($box[7] - $box[1]); // Determine position switch (strtolower($position)) { case 'top left': $x = 0 + $x_offset; $y = 0 + $y_offset + $box_height; break; case 'top right': $x = $this->width - $box_width + $x_offset; $y = 0 + $y_offset + $box_height; break; case 'top': $x = ($this->width / 2) - ($box_width / 2) + $x_offset; $y = 0 + $y_offset + $box_height; break; case 'bottom left': $x = 0 + $x_offset; $y = $this->height - $box_height + $y_offset + $box_height; break; case 'bottom right': $x = $this->width - $box_width + $x_offset; $y = $this->height - $box_height + $y_offset + $box_height; break; case 'bottom': $x = ($this->width / 2) - ($box_width / 2) + $x_offset; $y = $this->height - $box_height + $y_offset + $box_height; break; case 'left': $x = 0 + $x_offset; $y = ($this->height / 2) - (($box_height / 2) - $box_height) + $y_offset; break; case 'right'; $x = $this->width - $box_width + $x_offset; $y = ($this->height / 2) - (($box_height / 2) - $box_height) + $y_offset; break; case 'center': default: $x = ($this->width / 2) - ($box_width / 2) + $x_offset; $y = ($this->height / 2) - (($box_height / 2) - $box_height) + $y_offset; break; } if($alignment === "left") { // Left aligned text $x = -($x * 2); } else if($alignment === "right") { // Right aligned text $dimensions = imagettfbbox($font_size, $angle, $font_file, $text); $alignment_offset = abs($dimensions[4] - $dimensions[0]); $x = -(($x * 2) + $alignment_offset); } // Add the text imagesavealpha($this->image, true); imagealphablending($this->image, true); if(isset($stroke_color) && isset($stroke_size)) { // Text with stroke if(is_array($color) || is_array($stroke_color)) { // Multi colored text and/or multi colored stroke if(is_array($stroke_color)) { foreach($stroke_color as $key => $var) { $rgba = $this->normalize_color($stroke_color[$key]); $stroke_color[$key] = imagecolorallocatealpha($this->image, $rgba['r'], $rgba['g'], $rgba['b'], $rgba['a']); } } else { $rgba = $this->normalize_color($stroke_color); $stroke_color = imagecolorallocatealpha($this->image, $rgba['r'], $rgba['g'], $rgba['b'], $rgba['a']); } $array_of_letters = str_split($text, 1); foreach($array_of_letters as $key => $var) { if($key > 0) { $dimensions = imagettfbbox($font_size, $angle, $font_file, $array_of_letters[$key - 1]); $x += abs($dimensions[4] - $dimensions[0]) + $letter_spacing; } // If the next letter is empty, we just move forward to the next letter if($var !== " ") { $this->imagettfstroketext($this->image, $font_size, $angle, $x, $y, current($color_arr), current($stroke_color), $stroke_size, $font_file, $var); // #000 is 0, black will reset the array so we write it this way if(next($color_arr) === false) { reset($color_arr); } // #000 is 0, black will reset the array so we write it this way if(next($stroke_color) === false) { reset($stroke_color); } } } } else { $rgba = $this->normalize_color($stroke_color); $stroke_color = imagecolorallocatealpha($this->image, $rgba['r'], $rgba['g'], $rgba['b'], $rgba['a']); $this->imagettfstroketext($this->image, $font_size, $angle, $x, $y, $color_arr[0], $stroke_color, $stroke_size, $font_file, $text); } } else { // Text without stroke if(is_array($color)) { // Multi colored text $array_of_letters = str_split($text, 1); foreach($array_of_letters as $key => $var) { if($key > 0) { $dimensions = imagettfbbox($font_size, $angle, $font_file, $array_of_letters[$key - 1]); $x += abs($dimensions[4] - $dimensions[0]) + $letter_spacing; } // If the next letter is empty, we just move forward to the next letter if($var !== " ") { imagettftext($this->image, $font_size, $angle, $x, $y, current($color_arr), $font_file, $var); // #000 is 0, black will reset the array so we write it this way if(next($color_arr) === false) { reset($color_arr); } } } } else { imagettftext($this->image, $font_size, $angle, $x, $y, $color_arr[0], $font_file, $text); } } return $this; } /** * Thumbnail * * This function attempts to get the image to as close to the provided dimensions as possible, and then crops the * remaining overflow (from the center) to get the image to be the size specified. Useful for generating thumbnails. * * @param int $width * @param int|null $height If omitted - assumed equal to $width * * @return SimpleImage * */ function thumbnail($width, $height = null) { // Determine height $height = $height ?: $width; // Determine aspect ratios $current_aspect_ratio = $this->height / $this->width; $new_aspect_ratio = $height / $width; // Fit to height/width if ($new_aspect_ratio > $current_aspect_ratio) { $this->fit_to_height($height); } else { $this->fit_to_width($width); } $left = floor(($this->width / 2) - ($width / 2)); $top = floor(($this->height / 2) - ($height / 2)); // Return trimmed image return $this->crop($left, $top, $width + $left, $height + $top); } /** * Returns the file extension of the specified file * * @param string $filename * * @return string * */ protected function file_ext($filename) { if (!preg_match('/\./', $filename)) { return ''; } return preg_replace('/^.*\./', '', $filename); } /** * Get meta data of image or base64 string * * @param string|null $imagestring If omitted treat as a normal image * * @return SimpleImage * @throws Exception * */ protected function get_meta_data() { //gather meta data if(empty($this->imagestring)) { $info = getimagesize($this->filename); switch ($info['mime']) { case 'image/gif': $this->image = imagecreatefromgif($this->filename); break; case 'image/jpeg': $this->image = imagecreatefromjpeg($this->filename); break; case 'image/png': $this->image = imagecreatefrompng($this->filename); break; default: throw new Exception('Invalid image: '.$this->filename); break; } } elseif (function_exists('getimagesizefromstring')) { $info = getimagesizefromstring($this->imagestring); } else { throw new Exception('PHP 5.4 is required to use method getimagesizefromstring'); } $this->original_info = array( 'width' => $info[0], 'height' => $info[1], 'orientation' => $this->get_orientation(), 'exif' => function_exists('exif_read_data') && $info['mime'] === 'image/jpeg' && $this->imagestring === null ? $this->exif = @exif_read_data($this->filename) : null, 'format' => preg_replace('/^image\//', '', $info['mime']), 'mime' => $info['mime'] ); $this->width = $info[0]; $this->height = $info[1]; imagesavealpha($this->image, true); imagealphablending($this->image, true); return $this; } /** * Same as PHP's imagecopymerge() function, except preserves alpha-transparency in 24-bit PNGs * * @param $dst_im * @param $src_im * @param $dst_x * @param $dst_y * @param $src_x * @param $src_y * @param $src_w * @param $src_h * @param $pct * * @link http://www.php.net/manual/en/function.imagecopymerge.php#88456 * */ protected function imagecopymerge_alpha($dst_im, $src_im, $dst_x, $dst_y, $src_x, $src_y, $src_w, $src_h, $pct) { // Get image width and height and percentage $pct /= 100; $w = imagesx($src_im); $h = imagesy($src_im); // Turn alpha blending off imagealphablending($src_im, false); // Find the most opaque pixel in the image (the one with the smallest alpha value) $minalpha = 127; for ($x = 0; $x < $w; $x++) { for ($y = 0; $y < $h; $y++) { $alpha = (imagecolorat($src_im, $x, $y) >> 24) & 0xFF; if ($alpha < $minalpha) { $minalpha = $alpha; } } } // Loop through image pixels and modify alpha for each for ($x = 0; $x < $w; $x++) { for ($y = 0; $y < $h; $y++) { // Get current alpha value (represents the TANSPARENCY!) $colorxy = imagecolorat($src_im, $x, $y); $alpha = ($colorxy >> 24) & 0xFF; // Calculate new alpha if ($minalpha !== 127) { $alpha = 127 + 127 * $pct * ($alpha - 127) / (127 - $minalpha); } else { $alpha += 127 * $pct; } // Get the color index with new alpha $alphacolorxy = imagecolorallocatealpha($src_im, ($colorxy >> 16) & 0xFF, ($colorxy >> 8) & 0xFF, $colorxy & 0xFF, $alpha); // Set pixel with the new color + opacity if (!imagesetpixel($src_im, $x, $y, $alphacolorxy)) { return; } } } // Copy it imagesavealpha($dst_im, true); imagealphablending($dst_im, true); imagesavealpha($src_im, true); imagealphablending($src_im, true); imagecopy($dst_im, $src_im, $dst_x, $dst_y, $src_x, $src_y, $src_w, $src_h); } /** * Same as imagettftext(), but allows for a stroke color and size * * @param object &$image A GD image object * @param float $size The font size * @param float $angle The angle in degrees * @param int $x X-coordinate of the starting position * @param int $y Y-coordinate of the starting position * @param int &$textcolor The color index of the text * @param int &$stroke_color The color index of the stroke * @param int $stroke_size The stroke size in pixels * @param string $fontfile The path to the font to use * @param string $text The text to output * * @return array This method has the same return values as imagettftext() * */ protected function imagettfstroketext(&$image, $size, $angle, $x, $y, &$textcolor, &$strokecolor, $stroke_size, $fontfile, $text) { for( $c1 = ($x - abs($stroke_size)); $c1 <= ($x + abs($stroke_size)); $c1++ ) { for($c2 = ($y - abs($stroke_size)); $c2 <= ($y + abs($stroke_size)); $c2++) { $bg = imagettftext($image, $size, $angle, $c1, $c2, $strokecolor, $fontfile, $text); } } return imagettftext($image, $size, $angle, $x, $y, $textcolor, $fontfile, $text); } /** * Ensures $value is always within $min and $max range. * * If lower, $min is returned. If higher, $max is returned. * * @param int|float $value * @param int|float $min * @param int|float $max * * @return int|float * */ protected function keep_within($value, $min, $max) { if ($value < $min) { return $min; } if ($value > $max) { return $max; } return $value; } /** * Converts a hex color value to its RGB equivalent * * @param string $color Hex color string, array(red, green, blue) or array(red, green, blue, alpha). * Where red, green, blue - integers 0-255, alpha - integer 0-127 * * @return array|bool * */ protected function normalize_color($color) { if (is_string($color)) { $color = trim($color, '#'); if (strlen($color) == 6) { list($r, $g, $b) = array( $color[0].$color[1], $color[2].$color[3], $color[4].$color[5] ); } elseif (strlen($color) == 3) { list($r, $g, $b) = array( $color[0].$color[0], $color[1].$color[1], $color[2].$color[2] ); } else { return false; } return array( 'r' => hexdec($r), 'g' => hexdec($g), 'b' => hexdec($b), 'a' => 0 ); } elseif (is_array($color) && (count($color) == 3 || count($color) == 4)) { if (isset($color['r'], $color['g'], $color['b'])) { return array( 'r' => $this->keep_within($color['r'], 0, 255), 'g' => $this->keep_within($color['g'], 0, 255), 'b' => $this->keep_within($color['b'], 0, 255), 'a' => $this->keep_within(isset($color['a']) ? $color['a'] : 0, 0, 127) ); } elseif (isset($color[0], $color[1], $color[2])) { return array( 'r' => $this->keep_within($color[0], 0, 255), 'g' => $this->keep_within($color[1], 0, 255), 'b' => $this->keep_within($color[2], 0, 255), 'a' => $this->keep_within(isset($color[3]) ? $color[3] : 0, 0, 127) ); } } return false; } }
/
Имя
Дата
Размер
..
2026-10-02
.well-known
2022-05-24
0419be9f6cf559b70d22f61f9fc82f38
2013-06-02
FirmClasses
2015-12-22
PHPMailer
2014-06-23
adadurov
2013-04-27
admin
2026-10-02
afisha
2023-12-27
ajax
2018-07-13
api
2018-01-23
app
2026-10-01
auth
2016-12-20
banner
2020-08-31
bootstrap
2019-02-07
busines
2020-01-15
captcha
2013-04-27
chat
2013-04-27
cron
2026-10-02
css
2019-12-13
error
2013-04-27
feedback
2017-01-27
filechange
2017-06-02
firma
2020-04-06
fonts
2020-04-06
forum
2026-10-01
fotogal
2019-04-15
friends
2017-02-13
fstat
2026-10-02
horoscop
2016-02-15
iframe_banners
2023-11-01
images
2023-12-26
img
2024-09-23
imgprivat
2013-04-27
inc
2026-10-01
job
2023-12-21
js
2019-02-14
kcaptcha
2015-12-30
klient
2018-10-18
konkurs
2016-04-14
konsult
2016-02-15
less
2015-09-25
lib
2013-04-27
library
2010-05-05
life
2024-01-25
maps
2017-11-10
news
2024-04-27
oblast
2017-02-02
partners
2018-05-08
photo_loop
2016-03-01
php_sess
2016-12-23
plugins
2016-02-17
pogoda
2026-10-02
politics
2026-05-25
private
2026-10-01
public
2013-04-27
realty
2017-03-15
realty2
2016-04-11
realty_old
2016-05-05
restoran
2017-07-13
saplnk
2018-10-15
scripts
2013-04-27
search
2019-03-04
sitemaps
2024-09-20
stat
2016-03-01
task
2017-02-14
temp
2015-04-04
template
2016-11-18
tests
2020-02-11
user
2017-08-17
user_file
2020-03-10
user_foto
2026-10-02
vendor
2020-02-07
vendor_old
2020-02-11
viktorina
2017-03-21
visitka
2020-02-26
widgets
2016-11-18
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322 байт
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323 байт
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2 кб.
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365 байт
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528 байт
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9 кб.
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40 кб.
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2019-04-25
161 байт
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2025-04-01
18 кб.
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