File: /var/www/html/tmpr/../tmpr/../tmpr/..//newdatasets/imageLibrary/SimpleImage.php
<?php
//
// SimpleImage
//
// A PHP class that makes working with images as simple as possible.
//
// Developed and maintained by Cory LaViska <https://github.com/claviska>.
//
// Copyright A Beautiful Site, LLC.
//
// Source: https://github.com/claviska/SimpleImage
//
// Licensed under the MIT license <http://opensource.org/licenses/MIT>
//
class SimpleImage {
const
ERR_FILE_NOT_FOUND = 1,
ERR_FONT_FILE = 2,
ERR_FREETYPE_NOT_ENABLED = 3,
ERR_GD_NOT_ENABLED = 4,
ERR_INVALID_COLOR = 5,
ERR_INVALID_DATA_URI = 6,
ERR_INVALID_IMAGE = 7,
ERR_LIB_NOT_LOADED = 8,
ERR_UNSUPPORTED_FORMAT = 9,
ERR_WEBP_NOT_ENABLED = 10,
ERR_WRITE = 11;
protected $image, $mimeType, $exif;
//////////////////////////////////////////////////////////////////////////////////////////////////
// Magic methods
//////////////////////////////////////////////////////////////////////////////////////////////////
//
// Creates a new SimpleImage object.
//
// $image (string) - An image file or a data URI to load.
//
public function __construct($image = null) {
// Check for the required GD extension
if(extension_loaded('gd')) {
// Ignore JPEG warnings that cause imagecreatefromjpeg() to fail
ini_set('gd.jpeg_ignore_warning', 1);
} else {
throw new \Exception('Required extension GD is not loaded.', self::ERR_GD_NOT_ENABLED);
}
// Load an image through the constructor
if(preg_match('/^data:(.*?);/', $image)) {
$this->fromDataUri($image);
} elseif($image) {
$this->fromFile($image);
}
}
//
// Destroys the image resource
//
public function __destruct() {
if($this->image !== null && get_resource_type($this->image) === 'gd') {
imagedestroy($this->image);
}
}
//////////////////////////////////////////////////////////////////////////////////////////////////
// Loaders
//////////////////////////////////////////////////////////////////////////////////////////////////
//
// Loads an image from a data URI.
//
// $uri* (string) - A data URI.
//
// Returns a SimpleImage object.
//
public function fromDataUri($uri) {
// Basic formatting check
preg_match('/^data:(.*?);/', $uri, $matches);
if(!count($matches)) {
throw new \Exception('Invalid data URI.', self::ERR_INVALID_DATA_URI);
}
// Determine mime type
$this->mimeType = $matches[1];
if(!preg_match('/^image\/(gif|jpeg|png)$/', $this->mimeType)) {
throw new \Exception(
'Unsupported format: ' . $this->mimeType,
self::ERR_UNSUPPORTED_FORMAT
);
}
// Get image data
$uri = base64_decode(preg_replace('/^data:(.*?);base64,/', '', $uri));
$this->image = imagecreatefromstring($uri);
if(!$this->image) {
throw new \Exception("Invalid image data.", self::ERR_INVALID_IMAGE);
}
return $this;
}
//
// Loads an image from a file.
//
// $file* (string) - The image file to load.
//
// Returns a SimpleImage object.
//
public function fromFile($file) {
// Check if the file exists and is readable. We're using fopen() instead of file_exists()
// because not all URL wrappers support the latter.
$handle = @fopen($file, 'r');
if($handle === false) {
throw new \Exception("File not found: $file", self::ERR_FILE_NOT_FOUND);
}
fclose($handle);
// Get image info
$info = getimagesize($file);
if($info === false) {
throw new \Exception("Invalid image file: $file", self::ERR_INVALID_IMAGE);
}
$this->mimeType = $info['mime'];
// Create image object from file
switch($this->mimeType) {
case 'image/gif':
// Load the gif
$gif = imagecreatefromgif($file);
if($gif) {
// Copy the gif over to a true color image to preserve its transparency. This is a
// workaround to prevent imagepalettetruecolor() from borking transparency.
$width = imagesx($gif);
$height = imagesy($gif);
$this->image = imagecreatetruecolor($width, $height);
$transparentColor = imagecolorallocatealpha($this->image, 0, 0, 0, 127);
imagecolortransparent($this->image, $transparentColor);
imagefill($this->image, 0, 0, $transparentColor);
imagecopy($this->image, $gif, 0, 0, 0, 0, $width, $height);
imagedestroy($gif);
}
break;
case 'image/jpeg':
$this->image = imagecreatefromjpeg($file);
break;
case 'image/png':
$this->image = imagecreatefrompng($file);
break;
case 'image/webp':
$this->image = imagecreatefromwebp($file);
break;
}
if(!$this->image) {
throw new \Exception("Unsupported image: $file", self::ERR_UNSUPPORTED_FORMAT);
}
// Convert pallete images to true color images
imagepalettetotruecolor($this->image);
// Load exif data from JPEG images
if($this->mimeType === 'image/jpeg' && function_exists('exif_read_data')) {
$this->exif = @exif_read_data($file);
}
return $this;
}
//
// Creates a new image.
//
// $width* (int) - The width of the image.
// $height* (int) - The height of the image.
// $color (string|array) - Optional fill color for the new image (default 'transparent').
//
// Returns a SimpleImage object.
//
public function fromNew($width, $height, $color = 'transparent') {
$this->image = imagecreatetruecolor($width, $height);
// Use PNG for dynamically created images because it's lossless and supports transparency
$this->mimeType = 'image/png';
// Fill the image with color
$this->fill($color);
return $this;
}
//
// Creates a new image from a string.
//
// $string* (string) - The raw image data as a string. Example:
//
// $string = file_get_contents('image.jpg');
//
// Returns a SimpleImage object.
//
public function fromString($string) {
return $this->fromFile('data://;base64,' . base64_encode($string));
}
//////////////////////////////////////////////////////////////////////////////////////////////////
// Savers
//////////////////////////////////////////////////////////////////////////////////////////////////
//
// Generates an image.
//
// $mimeType (string) - The image format to output as a mime type (defaults to the original mime
// type).
// $quality (int) - Image quality as a percentage (default 100).
//
// Returns an array containing the image data and mime type.
//
private function generate($mimeType = null, $quality = 100) {
// Format defaults to the original mime type
$mimeType = $mimeType ?: $this->mimeType;
// Ensure quality is a valid integer
if($quality === null) $quality = 100;
$quality = self::keepWithin((int) $quality, 0, 100);
// Capture output
ob_start();
// Generate the image
switch($mimeType) {
case 'image/gif':
imagesavealpha($this->image, true);
imagegif($this->image, null);
break;
case 'image/jpeg':
imageinterlace($this->image, true);
imagejpeg($this->image, null, $quality);
break;
case 'image/png':
imagesavealpha($this->image, true);
imagepng($this->image, null, round(9 * $quality / 100));
break;
case 'image/webp':
// Not all versions of PHP will have webp support enabled
if(!function_exists('imagewebp')) {
throw new \Exception(
'WEBP support is not enabled in your version of PHP.',
self::ERR_WEBP_NOT_ENABLED
);
}
imagesavealpha($this->image, true);
imagewebp($this->image, null, $quality);
break;
default:
throw new \Exception('Unsupported format: ' . $mimeType, self::ERR_UNSUPPORTED_FORMAT);
}
// Stop capturing
$data = ob_get_contents();
ob_end_clean();
return [
'data' => $data,
'mimeType' => $mimeType
];
}
//
// Generates a data URI.
//
// $mimeType (string) - The image format to output as a mime type (defaults to the original mime
// type).
// $quality (int) - Image quality as a percentage (default 100).
//
// Returns a string containing a data URI.
//
public function toDataUri($mimeType = null, $quality = 100) {
$image = $this->generate($mimeType, $quality);
return 'data:' . $image['mimeType'] . ';base64,' . base64_encode($image['data']);
}
//
// Forces the image to be downloaded to the clients machine. Must be called before any output is
// sent to the screen.
//
// $filename* (string) - The filename (without path) to send to the client (e.g. 'image.jpeg').
// $mimeType (string) - The image format to output as a mime type (defaults to the original mime
// type).
// $quality (int) - Image quality as a percentage (default 100).
//
public function toDownload($filename, $mimeType = null, $quality = 100) {
$image = $this->generate($mimeType, $quality);
// Set download headers
header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
header('Content-Description: File Transfer');
header('Content-Length: ' . strlen($image['data']));
header('Content-Transfer-Encoding: Binary');
header('Content-Type: application/octet-stream');
header("Content-Disposition: attachment; filename=\"$filename\"");
echo $image['data'];
return $this;
}
//
// Writes the image to a file.
//
// $mimeType (string) - The image format to output as a mime type (defaults to the original mime
// type).
// $quality (int) - Image quality as a percentage (default 100).
//
// Returns a SimpleImage object.
//
public function toFile($file, $mimeType = null, $quality = 100) {
$image = $this->generate($mimeType, $quality);
// Save the image to file
if(!file_put_contents($file, $image['data'])) {
throw new \Exception("Failed to write image to file: $file", self::ERR_WRITE);
}
return $this;
}
//
// Outputs the image to the screen. Must be called before any output is sent to the screen.
//
// $mimeType (string) - The image format to output as a mime type (defaults to the original mime
// type).
// $quality (int) - Image quality as a percentage (default 100).
//
// Returns a SimpleImage object.
//
public function toScreen($mimeType = null, $quality = 100) {
$image = $this->generate($mimeType, $quality);
// Output the image to stdout
header('Content-Type: ' . $image['mimeType']);
echo $image['data'];
return $this;
}
//
// Generates an image string.
//
// $mimeType (string) - The image format to output as a mime type (defaults to the original mime
// type).
// $quality (int) - Image quality as a percentage (default 100).
//
// Returns a SimpleImage object.
//
public function toString($mimeType = null, $quality = 100) {
return $this->generate($mimeType, $quality)['data'];
}
//////////////////////////////////////////////////////////////////////////////////////////////////
// Utilities
//////////////////////////////////////////////////////////////////////////////////////////////////
//
// Ensures a numeric value is always within the min and max range.
//
// $value* (int|float) - A numeric value to test.
// $min* (int|float) - The minimum allowed value.
// $max* (int|float) - The maximum allowed value.
//
// Returns an int|float value.
//
private static function keepWithin($value, $min, $max) {
if($value < $min) return $min;
if($value > $max) return $max;
return $value;
}
//
// Gets the image's current aspect ratio.
//
// Returns the aspect ratio as a float.
//
public function getAspectRatio() {
return $this->getWidth() / $this->getHeight();
}
//
// Gets the image's exif data.
//
// Returns an array of exif data or null if no data is available.
//
public function getExif() {
return isset($this->exif) ? $this->exif : null;
}
//
// Gets the image's current height.
//
// Returns the height as an integer.
//
public function getHeight() {
return (int) imagesy($this->image);
}
//
// Gets the mime type of the loaded image.
//
// Returns a mime type string.
//
public function getMimeType() {
return $this->mimeType;
}
//
// Gets the image's current orientation.
//
// Returns a string: 'landscape', 'portrait', or 'square'
//
public function getOrientation() {
$width = $this->getWidth();
$height = $this->getHeight();
if($width > $height) return 'landscape';
if($width < $height) return 'portrait';
return 'square';
}
//
// Gets the image's current width.
//
// Returns the width as an integer.
//
public function getWidth() {
return (int) imagesx($this->image);
}
//////////////////////////////////////////////////////////////////////////////////////////////////
// Manipulation
//////////////////////////////////////////////////////////////////////////////////////////////////
//
// Same as PHP's imagecopymerge, but works with transparent images. Used internally for overlay.
//
private static function imageCopyMergeAlpha($dstIm, $srcIm, $dstX, $dstY, $srcX, $srcY, $srcW, $srcH, $pct) {
// Are we merging with transparency?
if($pct < 100) {
// Disable alpha blending and "colorize" the image using a transparent color
imagealphablending($srcIm, false);
imagefilter($srcIm, IMG_FILTER_COLORIZE, 0, 0, 0, 127 * ((100 - $pct) / 100));
}
imagecopy($dstIm, $srcIm, $dstX, $dstY, $srcX, $srcY, $srcW, $srcH);
return true;
}
//
// Rotates an image so the orientation will be correct based on its exif data. It is safe to call
// this method on images that don't have exif data (no changes will be made).
//
// Returns a SimpleImage object.
//
public function autoOrient() {
$exif = $this->getExif();
if(!$exif || !isset($exif['Orientation'])){
return $this;
}
switch($exif['Orientation']) {
case 1: // Do nothing!
break;
case 2: // Flip horizontally
$this->flip('x');
break;
case 3: // Rotate 180 degrees
$this->rotate(180);
break;
case 4: // Flip vertically
$this->flip('y');
break;
case 5: // Rotate 90 degrees clockwise and flip vertically
$this->flip('y')->rotate(90);
break;
case 6: // Rotate 90 clockwise
$this->rotate(90);
break;
case 7: // Rotate 90 clockwise and flip horizontally
$this->flip('x')->rotate(90);
break;
case 8: // Rotate 90 counterclockwise
$this->rotate(-90);
break;
}
return $this;
}
//
// Proportionally resize the image to fit inside a specific width and height.
//
// $maxWidth* (int) - The maximum width the image can be.
// $maxHeight* (int) - The maximum height the image can be.
//
// Returns a SimpleImage object.
//
public function bestFit($maxWidth, $maxHeight) {
// If the image already fits, there's nothing to do
if($this->getWidth() <= $maxWidth && $this->getHeight() <= $maxHeight) {
return $this;
}
// Calculate max width or height based on orientation
if($this->getOrientation() === 'portrait') {
$height = $maxHeight;
$width = $maxHeight * $this->getAspectRatio();
} else {
$width = $maxWidth;
$height = $maxWidth / $this->getAspectRatio();
}
// Reduce to max width
if($width > $maxWidth) {
$width = $maxWidth;
$height = $width / $this->getAspectRatio();
}
// Reduce to max height
if($height > $maxHeight) {
$height = $maxHeight;
$width = $height * $this->getAspectRatio();
}
return $this->resize($width, $height);
}
//
// Crop the image.
//
// $x1 - Top left x coordinate.
// $y1 - Top left y coordinate.
// $x2 - Bottom right x coordinate.
// $y2 - Bottom right x coordinate.
//
// Returns a SimpleImage object.
//
public function crop($x1, $y1, $x2, $y2) {
// Keep crop within image dimensions
$x1 = self::keepWithin($x1, 0, $this->getWidth());
$x2 = self::keepWithin($x2, 0, $this->getWidth());
$y1 = self::keepWithin($y1, 0, $this->getHeight());
$y2 = self::keepWithin($y2, 0, $this->getHeight());
// Crop it
$this->image = imagecrop($this->image, [
'x' => min($x1, $x2),
'y' => min($y1, $y2),
'width' => abs($x2 - $x1),
'height' => abs($y2 - $y1)
]);
return $this;
}
//
// Applies a duotone filter to the image.
//
// $lightColor* (string|array) - The lightest color in the duotone.
// $darkColor* (string|array) - The darkest color in the duotone.
//
// Returns a SimpleImage object.
//
function duotone($lightColor, $darkColor) {
$lightColor = self::normalizeColor($lightColor);
$darkColor = self::normalizeColor($darkColor);
// Calculate averages between light and dark colors
$redAvg = $lightColor['red'] - $darkColor['red'];
$greenAvg = $lightColor['green'] - $darkColor['green'];
$blueAvg = $lightColor['blue'] - $darkColor['blue'];
// Create a matrix of all possible duotone colors based on gray values
$pixels = [];
for($i = 0; $i <= 255; $i++) {
$grayAvg = $i / 255;
$pixels['red'][$i] = $darkColor['red'] + $grayAvg * $redAvg;
$pixels['green'][$i] = $darkColor['green'] + $grayAvg * $greenAvg;
$pixels['blue'][$i] = $darkColor['blue'] + $grayAvg * $blueAvg;
}
// Apply the filter pixel by pixel
for($x = 0; $x < $this->getWidth(); $x++) {
for($y = 0; $y < $this->getHeight(); $y++) {
$rgb = $this->getColorAt($x, $y);
$gray = min(255, round(0.299 * $rgb['red'] + 0.114 * $rgb['blue'] + 0.587 * $rgb['green']));
$this->dot($x, $y, [
'red' => $pixels['red'][$gray],
'green' => $pixels['green'][$gray],
'blue' => $pixels['blue'][$gray]
]);
}
}
return $this;
}
//
// Proportionally resize the image to a specific height.
//
// **DEPRECATED:** This method was deprecated in version 3.2.2 and will be removed in version 4.0.
// Please use `resize(null, $height)` instead.
//
// $height* (int) - The height to resize the image to.
//
// Returns a SimpleImage object.
//
public function fitToHeight($height) {
return $this->resize(null, $height);
}
//
// Proportionally resize the image to a specific width.
//
// **DEPRECATED:** This method was deprecated in version 3.2.2 and will be removed in version 4.0.
// Please use `resize($width, null)` instead.
//
// $width* (int) - The width to resize the image to.
//
// Returns a SimpleImage object.
//
public function fitToWidth($width) {
return $this->resize($width, null);
}
//
// Flip the image horizontally or vertically.
//
// $direction* (string) - The direction to flip: x|y|both
//
// Returns a SimpleImage object.
//
public function flip($direction) {
switch($direction) {
case 'x':
imageflip($this->image, IMG_FLIP_HORIZONTAL);
break;
case 'y':
imageflip($this->image, IMG_FLIP_VERTICAL);
break;
case 'both':
imageflip($this->image, IMG_FLIP_BOTH);
break;
}
return $this;
}
//
// Reduces the image to a maximum number of colors.
//
// $max* (int) - The maximum number of colors to use.
// $dither (bool) - Whether or not to use a dithering effect (default true).
//
// Returns a SimpleImage object.
//
public function maxColors($max, $dither = true) {
imagetruecolortopalette($this->image, $dither, max(1, $max));
return $this;
}
//
// Place an image on top of the current image.
//
// $overlay* (string|SimpleImage) - The image to overlay. This can be a filename, a data URI, or
// a SimpleImage object.
// $anchor (string) - The anchor point: 'center', 'top', 'bottom', 'left', 'right', 'top left',
// 'top right', 'bottom left', 'bottom right' (default 'center')
// $opacity (float) - The opacity level of the overlay 0-1 (default 1).
// $xOffset (int) - Horizontal offset in pixels (default 0).
// $yOffset (int) - Vertical offset in pixels (default 0).
//
// Returns a SimpleImage object.
//
public function overlay($overlay, $anchor = 'center', $opacity = 1, $xOffset = 0, $yOffset = 0) {
// Load overlay image
if(!($overlay instanceof SimpleImage)) {
$overlay = new SimpleImage($overlay);
}
// Convert opacity
$opacity = self::keepWithin($opacity, 0, 1) * 100;
// Determine placement
switch($anchor) {
case 'top left':
$x = $xOffset;
$y = $yOffset;
break;
case 'top right':
$x = $this->getWidth() - $overlay->getWidth() + $xOffset;
$y = $yOffset;
break;
case 'top':
$x = ($this->getWidth() / 2) - ($overlay->getWidth() / 2) + $xOffset;
$y = $yOffset;
break;
case 'bottom left':
$x = $xOffset;
$y = $this->getHeight() - $overlay->getHeight() + $yOffset;
break;
case 'bottom right':
$x = $this->getWidth() - $overlay->getWidth() + $xOffset;
$y = $this->getHeight() - $overlay->getHeight() + $yOffset;
break;
case 'bottom':
$x = ($this->getWidth() / 2) - ($overlay->getWidth() / 2) + $xOffset;
$y = $this->getHeight() - $overlay->getHeight() + $yOffset;
break;
case 'left':
$x = $xOffset;
$y = ($this->getHeight() / 2) - ($overlay->getHeight() / 2) + $yOffset;
break;
case 'right':
$x = $this->getWidth() - $overlay->getWidth() + $xOffset;
$y = ($this->getHeight() / 2) - ($overlay->getHeight() / 2) + $yOffset;
break;
default:
$x = ($this->getWidth() / 2) - ($overlay->getWidth() / 2) + $xOffset;
$y = ($this->getHeight() / 2) - ($overlay->getHeight() / 2) + $yOffset;
break;
}
// Perform the overlay
self::imageCopyMergeAlpha(
$this->image,
$overlay->image,
$x, $y,
0, 0,
$overlay->getWidth(),
$overlay->getHeight(),
$opacity
);
return $this;
}
//
// Resize an image to the specified dimensions. If only one dimension is specified, the image will
// be resized proportionally.
//
// $width* (int) - The new image width.
// $height* (int) - The new image height.
//
// Returns a SimpleImage object.
//
public function resize($width = null, $height = null) {
// No dimentions specified
if(!$width && !$height) {
return $this;
}
// Resize to width
if($width && !$height) {
$height = $width / $this->getAspectRatio();
}
// Resize to height
if(!$width && $height) {
$width = $height * $this->getAspectRatio();
}
// If the dimensions are the same, there's no need to resize
if($this->getWidth() === $width && $this->getHeight() === $height) {
return $this;
}
// We can't use imagescale because it doesn't seem to preserve transparency properly. The
// workaround is to create a new truecolor image, allocate a transparent color, and copy the
// image over to it using imagecopyresampled.
$newImage = imagecreatetruecolor($width, $height);
$transparentColor = imagecolorallocatealpha($newImage, 0, 0, 0, 127);
imagecolortransparent($newImage, $transparentColor);
imagefill($newImage, 0, 0, $transparentColor);
imagecopyresampled(
$newImage,
$this->image,
0, 0, 0, 0,
$width,
$height,
$this->getWidth(),
$this->getHeight()
);
// Swap out the new image
$this->image = $newImage;
return $this;
}
//
// Rotates the image.
//
// $angle* (int) - The angle of rotation (-360 - 360).
// $backgroundColor (string|array) - The background color to use for the uncovered zone area
// after rotation (default 'transparent').
//
// Returns a SimpleImage object.
//
public function rotate($angle, $backgroundColor = 'transparent') {
// Rotate the image on a canvas with the desired background color
$backgroundColor = $this->allocateColor($backgroundColor);
$this->image = imagerotate(
$this->image,
-(self::keepWithin($angle, -360, 360)),
$backgroundColor
);
imagecolortransparent($this->image, imagecolorallocatealpha($this->image, 0, 0, 0, 127));
return $this;
}
//
// Adds text to the image.
//
// $text* (string) - The desired text.
// $options (array) - An array of options.
// - fontFile* (string) - The TrueType (or compatible) font file to use.
// - size (int) - The size of the font in pixels (default 12).
// - color (string|array) - The text color (default black).
// - anchor (string) - The anchor point: 'center', 'top', 'bottom', 'left', 'right',
// 'top left', 'top right', 'bottom left', 'bottom right' (default 'center').
// - xOffset (int) - The horizontal offset in pixels (default 0).
// - yOffset (int) - The vertical offset in pixels (default 0).
// - shadow (array) - Text shadow params.
// - x* (int) - Horizontal offset in pixels.
// - y* (int) - Vertical offset in pixels.
// - color* (string|array) - The text shadow color.
// $boundary (array) - If passed, this variable will contain an array with coordinates that
// surround the text: [x1, y1, x2, y2, width, height]. This can be used for calculating the
// text's position after it gets added to the image.
//
// Returns a SimpleImage object.
//
public function text($text, $options, &$boundary = null) {
// Check for freetype support
if(!function_exists('imagettftext')) {
throw new \Exception(
'Freetype support is not enabled in your version of PHP.',
self::ERR_FREETYPE_NOT_ENABLED
);
}
// Default options
$options = array_merge([
'fontFile' => null,
'size' => 12,
'color' => 'black',
'anchor' => 'center',
'xOffset' => 0,
'yOffset' => 0,
'shadow' => null
], $options);
// Extract and normalize options
$fontFile = $options['fontFile'];
$size = ($options['size'] / 96) * 72; // Convert px to pt (72pt per inch, 96px per inch)
$color = $this->allocateColor($options['color']);
$anchor = $options['anchor'];
$xOffset = $options['xOffset'];
$yOffset = $options['yOffset'];
$angle = 0;
// Calculate the bounding box dimensions
//
// Since imagettfbox() returns a bounding box from the text's baseline, we can end up with
// different heights for different strings of the same font size. For example, 'type' will often
// be taller than 'text' because the former has a descending letter.
//
// To compensate for this, we create two bounding boxes: one to measure the cap height and
// another to measure the descender height. Based on that, we can adjust the text vertically
// to appear inside the box with a reasonable amount of consistency.
//
// See: https://github.com/claviska/SimpleImage/issues/165
//
$box = imagettfbbox($size, $angle, $fontFile, $text);
if(!$box) {
throw new \Exception("Unable to load font file: $fontFile", self::ERR_FONT_FILE);
}
$boxWidth = abs($box[6] - $box[2]);
$boxHeight = $options['size'];
// Determine cap height
$box = imagettfbbox($size, $angle, $fontFile, 'X');
$capHeight = abs($box[7] - $box[1]);
// Determine descender height
$box = imagettfbbox($size, $angle, $fontFile, 'X Qgjpqy');
$fullHeight = abs($box[7] - $box[1]);
$descenderHeight = $fullHeight - $capHeight;
// Determine position
switch($anchor) {
case 'top left':
$x = $xOffset;
$y = $yOffset + $boxHeight;
break;
case 'top right':
$x = $this->getWidth() - $boxWidth + $xOffset;
$y = $yOffset + $boxHeight;
break;
case 'top':
$x = ($this->getWidth() / 2) - ($boxWidth / 2) + $xOffset;
$y = $yOffset + $boxHeight;
break;
case 'bottom left':
$x = $xOffset;
$y = $this->getHeight() - $boxHeight + $yOffset + $boxHeight;
break;
case 'bottom right':
$x = $this->getWidth() - $boxWidth + $xOffset;
$y = $this->getHeight() - $boxHeight + $yOffset + $boxHeight;
break;
case 'bottom':
$x = ($this->getWidth() / 2) - ($boxWidth / 2) + $xOffset;
$y = $this->getHeight() - $boxHeight + $yOffset + $boxHeight;
break;
case 'left':
$x = $xOffset;
$y = ($this->getHeight() / 2) - (($boxHeight / 2) - $boxHeight) + $yOffset;
break;
case 'right';
$x = $this->getWidth() - $boxWidth + $xOffset;
$y = ($this->getHeight() / 2) - (($boxHeight / 2) - $boxHeight) + $yOffset;
break;
default: // center
$x = ($this->getWidth() / 2) - ($boxWidth / 2) + $xOffset;
$y = ($this->getHeight() / 2) - (($boxHeight / 2) - $boxHeight) + $yOffset;
break;
}
$x = (int) round($x);
$y = (int) round($y);
// Pass the boundary back by reference
$boundary = [
'x1' => $x,
'y1' => $y - $boxHeight, // $y is the baseline, not the top!
'x2' => $x + $boxWidth,
'y2' => $y,
'width' => $boxWidth,
'height' => $boxHeight
];
// Text shadow
if(is_array($options['shadow'])) {
imagettftext(
$this->image,
$size,
$angle,
$x + $options['shadow']['x'],
$y + $options['shadow']['y'] - $descenderHeight,
$this->allocateColor($options['shadow']['color']),
$fontFile,
$text
);
}
// Draw the text
imagettftext($this->image, $size, $angle, $x, $y - $descenderHeight, $color, $fontFile, $text);
return $this;
}
//
// Creates a thumbnail image. This function attempts to get the image as close to the provided
// dimensions as possible, then crops the remaining overflow to force the desired size. Useful
// for generating thumbnail images.
//
// $width* (int) - The thumbnail width.
// $height* (int) - The thumbnail height.
// $anchor (string) - The anchor point: 'center', 'top', 'bottom', 'left', 'right', 'top left',
// 'top right', 'bottom left', 'bottom right' (default 'center').
//
// Returns a SimpleImage object.
//
public function thumbnail($width, $height, $anchor = 'center') {
// Determine aspect ratios
$currentRatio = $this->getHeight() / $this->getWidth();
$targetRatio = $height / $width;
// Fit to height/width
if($targetRatio > $currentRatio) {
$this->resize(null, $height);
} else {
$this->resize($width, null);
}
switch($anchor) {
case 'top':
$x1 = floor(($this->getWidth() / 2) - ($width / 2));
$x2 = $width + $x1;
$y1 = 0;
$y2 = $height;
break;
case 'bottom':
$x1 = floor(($this->getWidth() / 2) - ($width / 2));
$x2 = $width + $x1;
$y1 = $this->getHeight() - $height;
$y2 = $this->getHeight();
break;
case 'left':
$x1 = 0;
$x2 = $width;
$y1 = floor(($this->getHeight() / 2) - ($height / 2));
$y2 = $height + $y1;
break;
case 'right':
$x1 = $this->getWidth() - $width;
$x2 = $this->getWidth();
$y1 = floor(($this->getHeight() / 2) - ($height / 2));
$y2 = $height + $y1;
break;
case 'top left':
$x1 = 0;
$x2 = $width;
$y1 = 0;
$y2 = $height;
break;
case 'top right':
$x1 = $this->getWidth() - $width;
$x2 = $this->getWidth();
$y1 = 0;
$y2 = $height;
break;
case 'bottom left':
$x1 = 0;
$x2 = $width;
$y1 = $this->getHeight() - $height;
$y2 = $this->getHeight();
break;
case 'bottom right':
$x1 = $this->getWidth() - $width;
$x2 = $this->getWidth();
$y1 = $this->getHeight() - $height;
$y2 = $this->getHeight();
break;
default:
$x1 = floor(($this->getWidth() / 2) - ($width / 2));
$x2 = $width + $x1;
$y1 = floor(($this->getHeight() / 2) - ($height / 2));
$y2 = $height + $y1;
break;
}
// Return the cropped thumbnail image
return $this->crop($x1, $y1, $x2, $y2);
}
//////////////////////////////////////////////////////////////////////////////////////////////////
// Drawing
//////////////////////////////////////////////////////////////////////////////////////////////////
//
// Draws an arc.
//
// $x* (int) - The x coordinate of the arc's center.
// $y* (int) - The y coordinate of the arc's center.
// $width* (int) - The width of the arc.
// $height* (int) - The height of the arc.
// $start* (int) - The start of the arc in degrees.
// $end* (int) - The end of the arc in degrees.
// $color* (string|array) - The arc color.
// $thickness (int|string) - Line thickness in pixels or 'filled' (default 1).
//
// Returns a SimpleImage object.
//
public function arc($x, $y, $width, $height, $start, $end, $color, $thickness = 1) {
// Allocate the color
$color = $this->allocateColor($color);
// Draw an arc
if($thickness === 'filled') {
imagesetthickness($this->image, 1);
imagefilledarc($this->image, $x, $y, $width, $height, $start, $end, $color, IMG_ARC_PIE);
} else {
imagesetthickness($this->image, $thickness);
imagearc($this->image, $x, $y, $width, $height, $start, $end, $color);
}
return $this;
}
//
// Draws a border around the image.
//
// $color* (string|array) - The border color.
// $thickness (int) - The thickness of the border (default 1).
//
// Returns a SimpleImage object.
//
public function border($color, $thickness = 1) {
$x1 = 0;
$y1 = 0;
$x2 = $this->getWidth() - 1;
$y2 = $this->getHeight() - 1;
// Draw a border rectangle until it reaches the correct width
for($i = 0; $i < $thickness; $i++) {
$this->rectangle($x1++, $y1++, $x2--, $y2--, $color);
}
return $this;
}
//
// Draws a single pixel dot.
//
// $x* (int) - The x coordinate of the dot.
// $y* (int) - The y coordinate of the dot.
// $color* (string|array) - The dot color.
//
// Returns a SimpleImage object.
//
public function dot($x, $y, $color) {
$color = $this->allocateColor($color);
imagesetpixel($this->image, $x, $y, $color);
return $this;
}
//
// Draws an ellipse.
//
// $x* (int) - The x coordinate of the center.
// $y* (int) - The y coordinate of the center.
// $width* (int) - The ellipse width.
// $height* (int) - The ellipse height.
// $color* (string|array) - The ellipse color.
// $thickness (int|string) - Line thickness in pixels or 'filled' (default 1).
//
// Returns a SimpleImage object.
//
public function ellipse($x, $y, $width, $height, $color, $thickness = 1) {
// Allocate the color
$color = $this->allocateColor($color);
// Draw an ellipse
if($thickness === 'filled') {
imagesetthickness($this->image, 1);
imagefilledellipse($this->image, $x, $y, $width, $height, $color);
} else {
// imagesetthickness doesn't appear to work with imageellipse, so we work around it.
imagesetthickness($this->image, 1);
$i = 0;
while($i++ < $thickness * 2 - 1) {
imageellipse($this->image, $x, $y, --$width, $height--, $color);
}
}
return $this;
}
//
// Fills the image with a solid color.
//
// $color (string|array) - The fill color.
//
// Returns a SimpleImage object.
//
public function fill($color) {
// Draw a filled rectangle over the entire image
$this->rectangle(0, 0, $this->getWidth(), $this->getHeight(), 'white', 'filled');
// Now flood it with the appropriate color
$color = $this->allocateColor($color);
imagefill($this->image, 0, 0, $color);
return $this;
}
//
// Draws a line.
//
// $x1* (int) - The x coordinate for the first point.
// $y1* (int) - The y coordinate for the first point.
// $x2* (int) - The x coordinate for the second point.
// $y2* (int) - The y coordinate for the second point.
// $color (string|array) - The line color.
// $thickness (int) - The line thickness (default 1).
//
// Returns a SimpleImage object.
//
public function line($x1, $y1, $x2, $y2, $color, $thickness = 1) {
// Allocate the color
$color = $this->allocateColor($color);
// Draw a line
imagesetthickness($this->image, $thickness);
imageline($this->image, $x1, $y1, $x2, $y2, $color);
return $this;
}
//
// Draws a polygon.
//
// $vertices* (array) - The polygon's vertices in an array of x/y arrays. Example:
// [
// ['x' => x1, 'y' => y1],
// ['x' => x2, 'y' => y2],
// ['x' => xN, 'y' => yN]
// ]
// $color* (string|array) - The polygon color.
// $thickness (int|string) - Line thickness in pixels or 'filled' (default 1).
//
// Returns a SimpleImage object.
//
public function polygon($vertices, $color, $thickness = 1) {
// Allocate the color
$color = $this->allocateColor($color);
// Convert [['x' => x1, 'y' => x1], ['x' => x1, 'y' => y2], ...] to [x1, y1, x2, y2, ...]
$points = [];
foreach($vertices as $vals) {
$points[] = $vals['x'];
$points[] = $vals['y'];
}
// Draw a polygon
if($thickness === 'filled') {
imagesetthickness($this->image, 1);
imagefilledpolygon($this->image, $points, count($vertices), $color);
} else {
imagesetthickness($this->image, $thickness);
imagepolygon($this->image, $points, count($vertices), $color);
}
return $this;
}
//
// Draws a rectangle.
//
// $x1* (int) - The upper left x coordinate.
// $y1* (int) - The upper left y coordinate.
// $x2* (int) - The bottom right x coordinate.
// $y2* (int) - The bottom right y coordinate.
// $color* (string|array) - The rectangle color.
// $thickness (int|string) - Line thickness in pixels or 'filled' (default 1).
//
// Returns a SimpleImage object.
//
public function rectangle($x1, $y1, $x2, $y2, $color, $thickness = 1) {
// Allocate the color
$color = $this->allocateColor($color);
// Draw a rectangle
if($thickness === 'filled') {
imagesetthickness($this->image, 1);
imagefilledrectangle($this->image, $x1, $y1, $x2, $y2, $color);
} else {
imagesetthickness($this->image, $thickness);
imagerectangle($this->image, $x1, $y1, $x2, $y2, $color);
}
return $this;
}
//
// Draws a rounded rectangle.
//
// $x1* (int) - The upper left x coordinate.
// $y1* (int) - The upper left y coordinate.
// $x2* (int) - The bottom right x coordinate.
// $y2* (int) - The bottom right y coordinate.
// $radius* (int) - The border radius in pixels.
// $color* (string|array) - The rectangle color.
// $thickness (int|string) - Line thickness in pixels or 'filled' (default 1).
//
// Returns a SimpleImage object.
//
public function roundedRectangle($x1, $y1, $x2, $y2, $radius, $color, $thickness = 1) {
if($thickness === 'filled') {
// Draw the filled rectangle without edges
$this->rectangle($x1 + $radius + 1, $y1, $x2 - $radius - 1, $y2, $color, 'filled');
$this->rectangle($x1, $y1 + $radius + 1, $x1 + $radius, $y2 - $radius - 1, $color, 'filled');
$this->rectangle($x2 - $radius, $y1 + $radius + 1, $x2, $y2 - $radius - 1, $color, 'filled');
// Fill in the edges with arcs
$this->arc($x1 + $radius, $y1 + $radius, $radius * 2, $radius * 2, 180, 270, $color, 'filled');
$this->arc($x2 - $radius, $y1 + $radius, $radius * 2, $radius * 2, 270, 360, $color, 'filled');
$this->arc($x1 + $radius, $y2 - $radius, $radius * 2, $radius * 2, 90, 180, $color, 'filled');
$this->arc($x2 - $radius, $y2 - $radius, $radius * 2, $radius * 2, 360, 90, $color, 'filled');
} else {
// Draw the rectangle outline without edges
$this->line($x1 + $radius, $y1, $x2 - $radius, $y1, $color, $thickness);
$this->line($x1 + $radius, $y2, $x2 - $radius, $y2, $color, $thickness);
$this->line($x1, $y1 + $radius, $x1, $y2 - $radius, $color, $thickness);
$this->line($x2, $y1 + $radius, $x2, $y2 - $radius, $color, $thickness);
// Fill in the edges with arcs
$this->arc($x1 + $radius, $y1 + $radius, $radius * 2, $radius * 2, 180, 270, $color, $thickness);
$this->arc($x2 - $radius, $y1 + $radius, $radius * 2, $radius * 2, 270, 360, $color, $thickness);
$this->arc($x1 + $radius, $y2 - $radius, $radius * 2, $radius * 2, 90, 180, $color, $thickness);
$this->arc($x2 - $radius, $y2 - $radius, $radius * 2, $radius * 2, 360, 90, $color, $thickness);
}
return $this;
}
//////////////////////////////////////////////////////////////////////////////////////////////////
// Filters
//////////////////////////////////////////////////////////////////////////////////////////////////
//
// Applies the blur filter.
//
// $type (string) - The blur algorithm to use: 'selective', 'gaussian' (default 'gaussian').
// $passes (int) - The number of time to apply the filter, enhancing the effect (default 1).
//
// Returns a SimpleImage object.
//
public function blur($type = 'selective', $passes = 1) {
$filter = $type === 'gaussian' ? IMG_FILTER_GAUSSIAN_BLUR : IMG_FILTER_SELECTIVE_BLUR;
for($i = 0; $i < $passes; $i++) {
imagefilter($this->image, $filter);
}
return $this;
}
//
// Applies the brightness filter to brighten the image.
//
// $percentage* (int) - Percentage to brighten the image (0 - 100).
//
// Returns a SimpleImage object.
//
public function brighten($percentage) {
$percentage = self::keepWithin(255 * $percentage / 100, 0, 255);
imagefilter($this->image, IMG_FILTER_BRIGHTNESS, $percentage);
return $this;
}
//
// Applies the colorize filter.
//
// $color* (string|array) - The filter color.
//
// Returns a SimpleImage object.
//
public function colorize($color) {
$color = self::normalizeColor($color);
imagefilter(
$this->image,
IMG_FILTER_COLORIZE,
$color['red'],
$color['green'],
$color['blue'],
127 - ($color['alpha'] * 127)
);
return $this;
}
//
// Applies the contrast filter.
//
// $percentage* (int) - Percentage to adjust (-100 - 100).
//
// Returns a SimpleImage object.
//
public function contrast($percentage) {
imagefilter($this->image, IMG_FILTER_CONTRAST, self::keepWithin($percentage, -100, 100));
return $this;
}
//
// Applies the brightness filter to darken the image.
//
// $percentage* (int) - Percentage to darken the image (0 - 100).
//
// Returns a SimpleImage object.
//
public function darken($percentage) {
$percentage = self::keepWithin(255 * $percentage / 100, 0, 255);
imagefilter($this->image, IMG_FILTER_BRIGHTNESS, -$percentage);
return $this;
}
//
// Applies the desaturate (grayscale) filter.
//
// Returns a SimpleImage object.
//
public function desaturate() {
imagefilter($this->image, IMG_FILTER_GRAYSCALE);
return $this;
}
//
// Applies the edge detect filter.
//
// Returns a SimpleImage object.
//
public function edgeDetect() {
imagefilter($this->image, IMG_FILTER_EDGEDETECT);
return $this;
}
//
// Applies the emboss filter.
//
// Returns a SimpleImage object.
//
public function emboss() {
imagefilter($this->image, IMG_FILTER_EMBOSS);
return $this;
}
//
// Inverts the image's colors.
//
// Returns a SimpleImage object.
//
public function invert() {
imagefilter($this->image, IMG_FILTER_NEGATE);
return $this;
}
//
// Changes the image's opacity level.
//
// $opacity* (float) - The desired opacity level (0 - 1).
//
// Returns a SimpleImage object.
//
public function opacity($opacity) {
// Create a transparent image
$newImage = new SimpleImage();
$newImage->fromNew($this->getWidth(), $this->getHeight());
// Copy the current image (with opacity) onto the transparent image
self::imageCopyMergeAlpha(
$newImage->image,
$this->image,
0, 0,
0, 0,
$this->getWidth(),
$this->getHeight(),
self::keepWithin($opacity, 0, 1) * 100
);
return $this;
}
//
// Applies the pixelate filter.
//
// $size (int) - The size of the blocks in pixels (default 10).
//
// Returns a SimpleImage object.
//
public function pixelate($size = 10) {
imagefilter($this->image, IMG_FILTER_PIXELATE, $size, true);
return $this;
}
//
// Simulates a sepia effect by desaturating the image and applying a sepia tone.
//
// Returns a SimpleImage object.
//
public function sepia() {
imagefilter($this->image, IMG_FILTER_GRAYSCALE);
imagefilter($this->image, IMG_FILTER_COLORIZE, 70, 35, 0);
return $this;
}
//
// Sharpens the image.
//
// $amount (int) - Sharpening amount (default 50)
//
// Returns a SimpleImage object.
//
public function sharpen($amount = 50) {
// Normalize amount
$amount = max(1, min(100, $amount)) / 100;
$sharpen = [
[-1, -1, -1],
[-1, 8 / $amount, -1],
[-1, -1, -1],
];
$divisor = array_sum(array_map('array_sum', $sharpen));
imageconvolution($this->image, $sharpen, $divisor, 0);
return $this;
}
//
// Applies the mean remove filter to produce a sketch effect.
//
// Returns a SimpleImage object.
//
public function sketch() {
imagefilter($this->image, IMG_FILTER_MEAN_REMOVAL);
return $this;
}
//////////////////////////////////////////////////////////////////////////////////////////////////
// Color utilities
//////////////////////////////////////////////////////////////////////////////////////////////////
//
// Converts a "friendly color" into a color identifier for use with GD's image functions.
//
// $image (resource) - The target image.
// $color (string|array) - The color to allocate.
//
// Returns a color identifier.
//
private function allocateColor($color) {
$color = self::normalizeColor($color);
// Was this color already allocated?
$index = imagecolorexactalpha(
$this->image,
$color['red'],
$color['green'],
$color['blue'],
127 - ($color['alpha'] * 127)
);
if($index > -1) {
// Yes, return this color index
return $index;
}
// Allocate a new color index
return imagecolorallocatealpha(
$this->image,
$color['red'],
$color['green'],
$color['blue'],
127 - ($color['alpha'] * 127)
);
}
//
// Adjusts a color by increasing/decreasing red/green/blue/alpha values independently.
//
// $color* (string|array) - The color to adjust.
// $red* (int) - Red adjustment (-255 - 255).
// $green* (int) - Green adjustment (-255 - 255).
// $blue* (int) - Blue adjustment (-255 - 255).
// $alpha* (float) - Alpha adjustment (-1 - 1).
//
// Returns an RGBA color array.
//
public static function adjustColor($color, $red, $green, $blue, $alpha) {
// Normalize to RGBA
$color = self::normalizeColor($color);
// Adjust each channel
return self::normalizeColor([
'red' => $color['red'] + $red,
'green' => $color['green'] + $green,
'blue' => $color['blue'] + $blue,
'alpha' => $color['alpha'] + $alpha
]);
}
//
// Darkens a color.
//
// $color* (string|array) - The color to darken.
// $amount* (int) - Amount to darken (0 - 255).
//
// Returns an RGBA color array.
//
public static function darkenColor($color, $amount) {
return self::adjustColor($color, -$amount, -$amount, -$amount, 0);
}
//
// Extracts colors from an image like a human would do.™ This method requires the third-party
// library \League\ColorExtractor. If you're using Composer, it will be installed for you
// automatically.
//
// $count (int) - The max number of colors to extract (default 5).
// $backgroundColor (string|array) - By default any pixel with alpha value greater than zero will
// be discarded. This is because transparent colors are not perceived as is. For example, fully
// transparent black would be seen white on a white background. So if you want to take
// transparency into account, you have to specify a default background color.
//
// Returns an array of RGBA colors arrays.
//
public function extractColors($count = 5, $backgroundColor = null) {
// Check for required library
if(!class_exists('\League\ColorExtractor\ColorExtractor')) {
throw new \Exception(
'Required library \League\ColorExtractor is missing.',
self::ERR_LIB_NOT_LOADED
);
}
// Convert background color to an integer value
if($backgroundColor) {
$backgroundColor = self::normalizeColor($backgroundColor);
$backgroundColor = \League\ColorExtractor\Color::fromRgbToInt([
'r' => $backgroundColor['red'],
'g' => $backgroundColor['green'],
'b' => $backgroundColor['blue']
]);
}
// Extract colors from the image
$palette = \League\ColorExtractor\Palette::fromGD($this->image, $backgroundColor);
$extractor = new \League\ColorExtractor\ColorExtractor($palette);
$colors = $extractor->extract($count);
// Convert colors to an RGBA color array
foreach($colors as $key => $value) {
$colors[$key] = self::normalizeColor(\League\ColorExtractor\Color::fromIntToHex($value));
}
return $colors;
}
//
// Gets the RGBA value of a single pixel.
//
// $x* (int) - The horizontal position of the pixel.
// $y* (int) - The vertical position of the pixel.
//
// Returns an RGBA color array or false if the x/y position is off the canvas.
//
public function getColorAt($x, $y) {
// Coordinates must be on the canvas
if($x < 0 || $x > $this->getWidth() || $y < 0 || $y > $this->getHeight()) {
return false;
}
// Get the color of this pixel and convert it to RGBA
$color = imagecolorat($this->image, $x, $y);
$rgba = imagecolorsforindex($this->image, $color);
$rgba['alpha'] = 127 - ($color >> 24) & 0xFF;
return $rgba;
}
//
// Lightens a color.
//
// $color* (string|array) - The color to lighten.
// $amount* (int) - Amount to darken (0 - 255).
//
// Returns an RGBA color array.
//
public static function lightenColor($color, $amount) {
return self::adjustColor($color, $amount, $amount, $amount, 0);
}
//
// Normalizes a hex or array color value to a well-formatted RGBA array.
//
// $color* (string|array) - A CSS color name, hex string, or an array [red, green, blue, alpha].
// You can pipe alpha transparency through hex strings and color names. For example:
//
// #fff|0.50 <-- 50% white
// red|0.25 <-- 25% red
//
// Returns an array: [red, green, blue, alpha]
//
public static function normalizeColor($color) {
// 140 CSS color names and hex values
$cssColors = [
'aliceblue' => '#f0f8ff', 'antiquewhite' => '#faebd7', 'aqua' => '#00ffff',
'aquamarine' => '#7fffd4', 'azure' => '#f0ffff', 'beige' => '#f5f5dc', 'bisque' => '#ffe4c4',
'black' => '#000000', 'blanchedalmond' => '#ffebcd', 'blue' => '#0000ff',
'blueviolet' => '#8a2be2', 'brown' => '#a52a2a', 'burlywood' => '#deb887',
'cadetblue' => '#5f9ea0', 'chartreuse' => '#7fff00', 'chocolate' => '#d2691e',
'coral' => '#ff7f50', 'cornflowerblue' => '#6495ed', 'cornsilk' => '#fff8dc',
'crimson' => '#dc143c', 'cyan' => '#00ffff', 'darkblue' => '#00008b', 'darkcyan' => '#008b8b',
'darkgoldenrod' => '#b8860b', 'darkgray' => '#a9a9a9', 'darkgrey' => '#a9a9a9',
'darkgreen' => '#006400', 'darkkhaki' => '#bdb76b', 'darkmagenta' => '#8b008b',
'darkolivegreen' => '#556b2f', 'darkorange' => '#ff8c00', 'darkorchid' => '#9932cc',
'darkred' => '#8b0000', 'darksalmon' => '#e9967a', 'darkseagreen' => '#8fbc8f',
'darkslateblue' => '#483d8b', 'darkslategray' => '#2f4f4f', 'darkslategrey' => '#2f4f4f',
'darkturquoise' => '#00ced1', 'darkviolet' => '#9400d3', 'deeppink' => '#ff1493',
'deepskyblue' => '#00bfff', 'dimgray' => '#696969', 'dimgrey' => '#696969',
'dodgerblue' => '#1e90ff', 'firebrick' => '#b22222', 'floralwhite' => '#fffaf0',
'forestgreen' => '#228b22', 'fuchsia' => '#ff00ff', 'gainsboro' => '#dcdcdc',
'ghostwhite' => '#f8f8ff', 'gold' => '#ffd700', 'goldenrod' => '#daa520', 'gray' => '#808080',
'grey' => '#808080', 'green' => '#008000', 'greenyellow' => '#adff2f',
'honeydew' => '#f0fff0', 'hotpink' => '#ff69b4', 'indianred ' => '#cd5c5c',
'indigo ' => '#4b0082', 'ivory' => '#fffff0', 'khaki' => '#f0e68c', 'lavender' => '#e6e6fa',
'lavenderblush' => '#fff0f5', 'lawngreen' => '#7cfc00', 'lemonchiffon' => '#fffacd',
'lightblue' => '#add8e6', 'lightcoral' => '#f08080', 'lightcyan' => '#e0ffff',
'lightgoldenrodyellow' => '#fafad2', 'lightgray' => '#d3d3d3', 'lightgrey' => '#d3d3d3',
'lightgreen' => '#90ee90', 'lightpink' => '#ffb6c1', 'lightsalmon' => '#ffa07a',
'lightseagreen' => '#20b2aa', 'lightskyblue' => '#87cefa', 'lightslategray' => '#778899',
'lightslategrey' => '#778899', 'lightsteelblue' => '#b0c4de', 'lightyellow' => '#ffffe0',
'lime' => '#00ff00', 'limegreen' => '#32cd32', 'linen' => '#faf0e6', 'magenta' => '#ff00ff',
'maroon' => '#800000', 'mediumaquamarine' => '#66cdaa', 'mediumblue' => '#0000cd',
'mediumorchid' => '#ba55d3', 'mediumpurple' => '#9370db', 'mediumseagreen' => '#3cb371',
'mediumslateblue' => '#7b68ee', 'mediumspringgreen' => '#00fa9a',
'mediumturquoise' => '#48d1cc', 'mediumvioletred' => '#c71585', 'midnightblue' => '#191970',
'mintcream' => '#f5fffa', 'mistyrose' => '#ffe4e1', 'moccasin' => '#ffe4b5',
'navajowhite' => '#ffdead', 'navy' => '#000080', 'oldlace' => '#fdf5e6', 'olive' => '#808000',
'olivedrab' => '#6b8e23', 'orange' => '#ffa500', 'orangered' => '#ff4500',
'orchid' => '#da70d6', 'palegoldenrod' => '#eee8aa', 'palegreen' => '#98fb98',
'paleturquoise' => '#afeeee', 'palevioletred' => '#db7093', 'papayawhip' => '#ffefd5',
'peachpuff' => '#ffdab9', 'peru' => '#cd853f', 'pink' => '#ffc0cb', 'plum' => '#dda0dd',
'powderblue' => '#b0e0e6', 'purple' => '#800080', 'rebeccapurple' => '#663399',
'red' => '#ff0000', 'rosybrown' => '#bc8f8f', 'royalblue' => '#4169e1',
'saddlebrown' => '#8b4513', 'salmon' => '#fa8072', 'sandybrown' => '#f4a460',
'seagreen' => '#2e8b57', 'seashell' => '#fff5ee', 'sienna' => '#a0522d',
'silver' => '#c0c0c0', 'skyblue' => '#87ceeb', 'slateblue' => '#6a5acd',
'slategray' => '#708090', 'slategrey' => '#708090', 'snow' => '#fffafa',
'springgreen' => '#00ff7f', 'steelblue' => '#4682b4', 'tan' => '#d2b48c', 'teal' => '#008080',
'thistle' => '#d8bfd8', 'tomato' => '#ff6347', 'turquoise' => '#40e0d0',
'violet' => '#ee82ee', 'wheat' => '#f5deb3', 'white' => '#ffffff', 'whitesmoke' => '#f5f5f5',
'yellow' => '#ffff00', 'yellowgreen' => '#9acd32'
];
// Parse alpha from '#fff|.5' and 'white|.5'
if(is_string($color) && strstr($color, '|')) {
$color = explode('|', $color);
$alpha = (float) $color[1];
$color = trim($color[0]);
} else {
$alpha = 1;
}
// Translate CSS color names to hex values
if(is_string($color) && array_key_exists(strtolower($color), $cssColors)) {
$color = $cssColors[strtolower($color)];
}
// Translate transparent keyword to a transparent color
if($color === 'transparent') {
$color = ['red' => 0, 'green' => 0, 'blue' => 0, 'alpha' => 0];
}
// Convert hex values to RGBA
if(is_string($color)) {
// Remove #
$hex = preg_replace('/^#/', '', $color);
// Support short and standard hex codes
if(strlen($hex) === 3) {
list($red, $green, $blue) = [
$hex[0] . $hex[0],
$hex[1] . $hex[1],
$hex[2] . $hex[2]
];
} elseif(strlen($hex) === 6) {
list($red, $green, $blue) = [
$hex[0] . $hex[1],
$hex[2] . $hex[3],
$hex[4] . $hex[5]
];
} else {
throw new \Exception("Invalid color value: $color", self::ERR_INVALID_COLOR);
}
// Turn color into an array
$color = [
'red' => hexdec($red),
'green' => hexdec($green),
'blue' => hexdec($blue),
'alpha' => $alpha
];
}
// Enforce color value ranges
if(is_array($color)) {
// RGB default to 0
$color['red'] = isset($color['red']) ? $color['red'] : 0;
$color['green'] = isset($color['green']) ? $color['green'] : 0;
$color['blue'] = isset($color['blue']) ? $color['blue'] : 0;
// Alpha defaults to 1
$color['alpha'] = isset($color['alpha']) ? $color['alpha'] : 1;
return [
'red' => (int) self::keepWithin((int) $color['red'], 0, 255),
'green' => (int) self::keepWithin((int) $color['green'], 0, 255),
'blue' => (int) self::keepWithin((int) $color['blue'], 0, 255),
'alpha' => self::keepWithin($color['alpha'], 0, 1)
];
}
throw new \Exception("Invalid color value: $color", self::ERR_INVALID_COLOR);
}
}