Viewing file:  ColorConverter.php (9.44 KB) -rw-rw-rw-
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<?php
namespace Mpdf\Color;
use Mpdf\Mpdf;
class ColorConverter
{
const MODE_GRAYSCALE = 1;
const MODE_SPOT = 2;
const MODE_RGB = 3;
const MODE_CMYK = 4;
const MODE_RGBA = 5;
const MODE_CMYKA = 6;
private $mpdf;
private $colorModeConverter;
private $colorSpaceRestrictor;
private $cache;
public function __construct(Mpdf $mpdf, ColorModeConverter $colorModeConverter, ColorSpaceRestrictor $colorSpaceRestrictor)
{
$this->mpdf = $mpdf;
$this->colorModeConverter = $colorModeConverter;
$this->colorSpaceRestrictor = $colorSpaceRestrictor;
$this->cache = [];
}
public function convert($color, array &$PDFAXwarnings = [])
{
$color = strtolower(trim($color));
if ($color === 'transparent' || $color === 'inherit') {
return false;
}
if (isset(NamedColors::$colors[$color])) {
$color = NamedColors::$colors[$color];
}
if (!isset($this->cache[$color])) {
$c = $this->convertPlain($color, $PDFAXwarnings);
$cstr = '';
if (is_array($c)) {
$c = array_pad($c, 6, 0);
$cstr = pack(
'a1ccccc',
$c[0],
round($c[1]) & 0xFF,
round($c[2]) & 0xFF,
round($c[3]) & 0xFF,
round($c[4]) & 0xFF,
round($c[5]) & 0xFF
);
}
$this->cache[$color] = $cstr;
}
return $this->cache[$color];
}
public function lighten($c)
{
$this->ensureBinaryColorFormat($c);
if ($c[0] == static::MODE_RGB || $c[0] == static::MODE_RGBA) {
list($h, $s, $l) = $this->colorModeConverter->rgb2hsl(ord($c[1]) / 255, ord($c[2]) / 255, ord($c[3]) / 255);
$l += ((1 - $l) * 0.8);
list($r, $g, $b) = $this->colorModeConverter->hsl2rgb($h, $s, $l);
$ret = [3, $r, $g, $b];
} elseif ($c[0] == static::MODE_CMYK || $c[0] == static::MODE_CMYKA) {
$ret = [4, max(0, ord($c[1]) - 20), max(0, ord($c[2]) - 20), max(0, ord($c[3]) - 20), max(0, ord($c[4]) - 20)];
} elseif ($c[0] == static::MODE_GRAYSCALE) {
$ret = [1, min(255, ord($c[1]) + 32)];
}
$c = array_pad($ret, 6, 0);
$cstr = pack(
'a1ccccc',
$c[0],
round($c[1]) & 0xFF,
round($c[2]) & 0xFF,
round($c[3]) & 0xFF,
round($c[4]) & 0xFF,
round($c[5]) & 0xFF
);
return $cstr;
}
public function darken($c)
{
$this->ensureBinaryColorFormat($c);
if ($c[0] == static::MODE_RGB || $c[0] == static::MODE_RGBA) {
list($h, $s, $l) = $this->colorModeConverter->rgb2hsl(ord($c[1]) / 255, ord($c[2]) / 255, ord($c[3]) / 255);
$s *= 0.25;
$l *= 0.75;
list($r, $g, $b) = $this->colorModeConverter->hsl2rgb($h, $s, $l);
$ret = [3, $r, $g, $b];
} elseif ($c[0] == static::MODE_CMYK || $c[0] == static::MODE_CMYKA) {
$ret = [4, min(100, ord($c[1]) + 20), min(100, ord($c[2]) + 20), min(100, ord($c[3]) + 20), min(100, ord($c[4]) + 20)];
} elseif ($c[0] == static::MODE_GRAYSCALE) {
$ret = [1, max(0, ord($c[1]) - 32)];
}
$c = array_pad($ret, 6, 0);
$cstr = pack('a1ccccc', $c[0], $c[1] & 0xFF, $c[2] & 0xFF, $c[3] & 0xFF, $c[4] & 0xFF, $c[5] & 0xFF);
return $cstr;
}
/**
* @param string $c
* @return float[]
*/
public function invert($c)
{
$this->ensureBinaryColorFormat($c);
if ($c[0] == static::MODE_RGB || $c[0] == static::MODE_RGBA) {
return [3, 255 - ord($c[1]), 255 - ord($c[2]), 255 - ord($c[3])];
}
if ($c[0] == static::MODE_CMYK || $c[0] == static::MODE_CMYKA) {
return [4, 100 - ord($c[1]), 100 - ord($c[2]), 100 - ord($c[3]), 100 - ord($c[4])];
}
if ($c[0] == static::MODE_GRAYSCALE) {
return [1, 255 - ord($c[1])];
}
// Cannot cope with non-RGB colors at present
throw new \Mpdf\MpdfException('Trying to invert non-RGB color');
}
/**
* @param string $c Binary color string
*
* @return string
*/
public function colAtoString($c)
{
if ($c[0] == static::MODE_GRAYSCALE) {
return 'rgb(' . ord($c[1]) . ', ' . ord($c[1]) . ', ' . ord($c[1]) . ')';
}
if ($c[0] == static::MODE_SPOT) {
return 'spot(' . ord($c[1]) . ', ' . ord($c[2]) . ')';
}
if ($c[0] == static::MODE_RGB) {
return 'rgb(' . ord($c[1]) . ', ' . ord($c[2]) . ', ' . ord($c[3]) . ')';
}
if ($c[0] == static::MODE_CMYK) {
return 'cmyk(' . ord($c[1]) . ', ' . ord($c[2]) . ', ' . ord($c[3]) . ', ' . ord($c[4]) . ')';
}
if ($c[0] == static::MODE_RGBA) {
return 'rgba(' . ord($c[1]) . ', ' . ord($c[2]) . ', ' . ord($c[3]) . ', ' . sprintf('%0.2F', ord($c[4]) / 100) . ')';
}
if ($c[0] == static::MODE_CMYKA) {
return 'cmyka(' . ord($c[1]) . ', ' . ord($c[2]) . ', ' . ord($c[3]) . ', ' . ord($c[4]) . ', ' . sprintf('%0.2F', ord($c[5]) / 100) . ')';
}
return '';
}
/**
* @param string $color
* @param string[] $PDFAXwarnings
*
* @return bool|float[]
*/
private function convertPlain($color, array &$PDFAXwarnings = [])
{
$c = false;
if (preg_match('/^[\d]+$/', $color)) {
$c = [static::MODE_GRAYSCALE, $color]; // i.e. integer only
} elseif (strpos($color, '#') === 0) { // case of #nnnnnn or #nnn
$c = $this->processHashColor($color);
} elseif (preg_match('/(rgba|rgb|device-cmyka|cmyka|device-cmyk|cmyk|hsla|hsl|spot)\((.*?)\)/', $color, $m)) {
// ignore colors containing CSS variables
if (str_starts_with(mb_strtolower($m[2]), 'var(--')) {
$m[2] = '0, 0, 0, 100';
}
$c = $this->processModeColor($m[1], explode(',', $m[2]));
}
if ($this->mpdf->PDFA || $this->mpdf->PDFX || $this->mpdf->restrictColorSpace) {
$c = $this->restrictColorSpace($c, $color, $PDFAXwarnings);
}
return $c;
}
/**
* @param string $color
*
* @return float[]
*/
private function processHashColor($color)
{
// in case of Background: #CCC url() x-repeat etc.
$cor = preg_replace('/\s+.*/', '', $color);
// Turn #RGB into #RRGGBB
if (strlen($cor) === 4) {
$cor = '#' . $cor[1] . $cor[1] . $cor[2] . $cor[2] . $cor[3] . $cor[3];
}
$r = self::safeHexDec(substr($cor, 1, 2));
$g = self::safeHexDec(substr($cor, 3, 2));
$b = self::safeHexDec(substr($cor, 5, 2));
return [3, $r, $g, $b];
}
/**
* @param $mode
* @param mixed[] $cores
* @return bool|float[]
*/
private function processModeColor($mode, array $cores)
{
$c = false;
$cores = $this->convertPercentCoreValues($mode, $cores);
switch ($mode) {
case 'rgb':
return [static::MODE_RGB, $cores[0], $cores[1], $cores[2]];
case 'rgba':
return [static::MODE_RGBA, $cores[0], $cores[1], $cores[2], $cores[3] * 100];
case 'cmyk':
case 'device-cmyk':
return [static::MODE_CMYK, $cores[0], $cores[1], $cores[2], $cores[3]];
case 'cmyka':
case 'device-cmyka':
return [static::MODE_CMYKA, $cores[0], $cores[1], $cores[2], $cores[3], $cores[4] * 100];
case 'hsl':
$conv = $this->colorModeConverter->hsl2rgb($cores[0] / 360, $cores[1], $cores[2]);
return [static::MODE_RGB, $conv[0], $conv[1], $conv[2]];
case 'hsla':
$conv = $this->colorModeConverter->hsl2rgb($cores[0] / 360, $cores[1], $cores[2]);
return [static::MODE_RGBA, $conv[0], $conv[1], $conv[2], $cores[3] * 100];
case 'spot':
$name = strtoupper(trim($cores[0]));
if (!isset($this->mpdf->spotColors[$name])) {
if (isset($cores[5])) {
$this->mpdf->AddSpotColor($cores[0], $cores[2], $cores[3], $cores[4], $cores[5]);
} else {
throw new \Mpdf\MpdfException(sprintf('Undefined spot color "%s"', $name));
}
}
return [static::MODE_SPOT, $this->mpdf->spotColors[$name]['i'], $cores[1]];
}
return $c;
}
/**
* @param string $mode
* @param mixed[] $cores
*
* @return float[]
*/
private function convertPercentCoreValues($mode, array $cores)
{
$ncores = count($cores);
if (strpos($cores[0], '%') !== false) {
$cores[0] = (float) $cores[0];
if ($mode === 'rgb' || $mode === 'rgba') {
$cores[0] = (int) ($cores[0] * 255 / 100);
}
}
if ($ncores > 1 && strpos($cores[1], '%') !== false) {
$cores[1] = (float) $cores[1];
if ($mode === 'rgb' || $mode === 'rgba') {
$cores[1] = (int) ($cores[1] * 255 / 100);
}
if ($mode === 'hsl' || $mode === 'hsla') {
$cores[1] /= 100;
}
}
if ($ncores > 2 && strpos($cores[2], '%') !== false) {
$cores[2] = (float) $cores[2];
if ($mode === 'rgb' || $mode === 'rgba') {
$cores[2] = (int) ($cores[2] * 255 / 100);
}
if ($mode === 'hsl' || $mode === 'hsla') {
$cores[2] /= 100;
}
}
if ($ncores > 3 && strpos($cores[3], '%') !== false) {
$cores[3] = (float) $cores[3];
}
return $cores;
}
/**
* @param mixed $c
* @param string $color
* @param string[] $PDFAXwarnings
*
* @return float[]
*/
private function restrictColorSpace($c, $color, &$PDFAXwarnings = [])
{
return $this->colorSpaceRestrictor->restrictColorSpace($c, $color, $PDFAXwarnings);
}
/**
* @param string $color Binary color string
*/
private function ensureBinaryColorFormat($color)
{
if (!is_string($color)) {
throw new \Mpdf\MpdfException('Invalid color input, binary color string expected');
}
if (strlen($color) !== 6) {
throw new \Mpdf\MpdfException('Invalid color input, binary color string expected');
}
if (!in_array($color[0], [static::MODE_GRAYSCALE, static::MODE_SPOT, static::MODE_RGB, static::MODE_CMYK, static::MODE_RGBA, static::MODE_CMYKA])) {
throw new \Mpdf\MpdfException('Invalid color input, invalid color mode in binary color string');
}
}
/**
* Converts the given hexString to its decimal representation when all digits are hexadecimal
*
* @param string $hexString The hexadecimal string to convert
* @return float|int The decimal representation of hexString or 0 if not all digits of hexString are hexadecimal
*/
private function safeHexDec($hexString)
{
return ctype_xdigit($hexString) ? hexdec($hexString) : 0;
}
}
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