Your IP : 18.118.119.238
<?php
/**
* Bitrix Framework
* @package bitrix
* @subpackage main
* @copyright 2001-2023 Bitrix
*/
namespace Bitrix\Main\File\Image;
use Bitrix\Main\File;
class Gd extends Engine
{
protected $resource;
protected $format;
/**
* @inheritDoc
*/
public function load()
{
$this->clear();
$info = $this->getInfo();
if ($info && $info->isSupported())
{
$this->format = $info->getFormat();
$resource = null;
switch ($this->format)
{
case File\Image::FORMAT_GIF:
$resource = imagecreatefromgif($this->file);
break;
case File\Image::FORMAT_PNG:
$resource = imagecreatefrompng($this->file);
break;
case File\Image::FORMAT_WEBP:
$resource = imagecreatefromwebp($this->file);
break;
case File\Image::FORMAT_BMP:
$resource = imagecreatefrombmp($this->file);
break;
case File\Image::FORMAT_JPEG:
ini_set('gd.jpeg_ignore_warning', 1);
$resource = imagecreatefromjpeg($this->file);
break;
}
if ($resource)
{
$this->resource = $resource;
return true;
}
}
return false;
}
/**
* @inheritDoc
*/
public function rotate($angle, Color $bgColor)
{
if ($this->resource === null)
{
return false;
}
$angle = 360 - $angle;
$alpha = (1.0 - $bgColor->getAlpha()) * 127;
$color = imagecolorallocatealpha($this->resource, $bgColor->getRed(), $bgColor->getGreen(), $bgColor->getBlue(), $alpha);
$resource = imagerotate($this->resource, $angle, $color);
if ($resource === false)
{
return false;
}
$this->clear();
$this->resource = $resource;
return true;
}
/**
* @inheritDoc
*/
public function flipVertical()
{
if ($this->resource === null)
{
return false;
}
return imageflip($this->resource, IMG_FLIP_VERTICAL);
}
/**
* @inheritDoc
*/
public function flipHorizontal()
{
if ($this->resource === null)
{
return false;
}
return imageflip($this->resource, IMG_FLIP_HORIZONTAL);
}
/**
* @inheritDoc
*/
public function setOrientation($orientation)
{
// not implemented
return true;
}
/**
* @inheritDoc
*/
public function resize(Rectangle $source, Rectangle $destination)
{
if ($this->resource === null)
{
return false;
}
$destinationWidth = $destination->getWidth();
$destinationHeight = $destination->getHeight();
if (($picture = imagecreatetruecolor($destinationWidth, $destinationHeight)))
{
$transparentColor = -1;
imagealphablending($picture, false);
if ($this->format == File\Image::FORMAT_PNG || $this->format == File\Image::FORMAT_WEBP)
{
$color = imagecolorallocatealpha($picture, 0, 0, 0, 127);
imagefilledrectangle($picture, 0, 0, $destinationWidth, $destinationHeight, $color);
}
elseif ($this->format == File\Image::FORMAT_GIF)
{
// save transparency
$transparentColor = $this->getTransparentColor();
if ($transparentColor >= 0)
{
$rgb = imagecolorsforindex($this->resource, $transparentColor);
$transparentColor = imagecolorallocatealpha($picture, $rgb['red'], $rgb['green'], $rgb['blue'], 127);
imagefilledrectangle($picture, 0, 0, $destinationWidth, $destinationHeight, $transparentColor);
}
}
if (imagecopyresampled($picture, $this->resource, 0, 0, $source->getX(), $source->getY(), $destinationWidth, $destinationHeight, $source->getWidth(), $source->getHeight()))
{
$this->clear();
$this->resource = $picture;
// restore transparency
if ($transparentColor >= 0)
{
$this->restoreTransparency($transparentColor);
}
return true;
}
}
return false;
}
/**
* @inheritDoc
*/
public function filter(Mask $mask)
{
if ($this->resource === null)
{
return false;
}
$transparentColor = -1;
if ($this->format == File\Image::FORMAT_GIF)
{
// Process transparency for GIFs
$transparentColor = $this->getTransparentColor();
}
// Fix left top corner
$newPixel = $this->calculatePixel($mask, 0, 0);
$result = imageconvolution($this->resource, $mask->getValue(), 1, 0);
if ($result)
{
// Fix left top corner
imagealphablending($this->resource, false);
imagesetpixel($this->resource, 0, 0, $newPixel);
// restore transparency
if ($transparentColor >= 0)
{
$this->restoreTransparency($transparentColor);
}
}
return $result;
}
protected function getTransparentColor(): int
{
$transparentColor = imagecolortransparent($this->resource);
if ($transparentColor < 0 || $transparentColor >= imagecolorstotal($this->resource))
{
return -1;
}
return $transparentColor;
}
protected function restoreTransparency($transparentColor)
{
imagecolortransparent($this->resource, $transparentColor);
$width = $this->getWidth();
$height = $this->getHeight();
for ($y = 0; $y < $height; ++$y)
{
for ($x = 0; $x < $width; ++$x)
{
if (((imagecolorat($this->resource, $x, $y) >> 24) & 0x7F) >= 100)
{
imagesetpixel($this->resource, $x, $y, $transparentColor);
}
}
}
}
/**
* @param Mask $mask
* @param int $x
* @param int $y
* @return false|int
*/
protected function calculatePixel($mask, $x, $y)
{
$width = $this->getWidth();
$height = $this->getHeight();
$alpha = (imagecolorat($this->resource, $x, $y) >> 24) & 0xFF;
$newR = $newG = $newB = 0;
for ($j = 0; $j < 3; ++$j)
{
$yv = $y - 1 + $j;
if ($yv < 0)
{
$yv = 0;
}
elseif ($yv >= $height)
{
$yv = $height - 1;
}
for ($i = 0; $i < 3; ++$i)
{
$xv = $x - 1 + $i;
if ($xv < 0)
{
$xv = 0;
}
elseif ($xv >= $width)
{
$xv = $width - 1;
}
$m = $mask[$j][$i];
$rgb = imagecolorat($this->resource, $xv, $yv);
$newR += (($rgb >> 16) & 0xFF) * $m;
$newG += (($rgb >> 8) & 0xFF) * $m;
$newB += ($rgb & 0xFF) * $m;
}
}
$newR = ($newR > 255 ? 255 : ($newR < 0 ? 0 : $newR));
$newG = ($newG > 255 ? 255 : ($newG < 0 ? 0 : $newG));
$newB = ($newB > 255 ? 255 : ($newB < 0 ? 0 : $newB));
return imagecolorallocatealpha($this->resource, $newR, $newG, $newB, $alpha);
}
/**
* @inheritDoc
*/
public function drawTextWatermark(TextWatermark $watermark)
{
if ($this->resource === null)
{
return false;
}
$font = $watermark->getFont();
if (!file_exists($font))
{
return false;
}
$utfText = $watermark->getUtfText();
$width = $this->getWidth();
$height = $this->getHeight();
if (($textWidth = $watermark->getWidth()) > 0)
{
$textBox = imagettfbbox(20, 0, $font, $utfText);
if (!is_array($textBox))
{
return false;
}
$scale = $textWidth / ($textBox[2] - $textBox[0]);
$fontSize = 20 * $scale;
$position = new Rectangle($textWidth, ($textBox[0] - $textBox[7]) * $scale);
}
else
{
$fontSize = $watermark->getFontSize($width);
$textBox = imagettfbbox($fontSize, 0, $font, $utfText);
$position = new Rectangle(($textBox[2] - $textBox[0]), ($textBox[0] - $textBox[7]));
}
$watermark->alignPosition($width, $height, $position);
$color = $watermark->getColor();
$textColor = imagecolorallocate($this->resource, $color->getRed(), $color->getGreen(), $color->getBlue());
if ($watermark->getVerticalAlignment() == Watermark::ALIGN_BOTTOM)
{
// Try to take into consideration font's descenders.
// Coordinates in imagettftext are for font's *baseline*.
// Let the descenders be 20% of the font size.
$descender = $fontSize * 0.2;
$y = $position->getY() + $position->getHeight() - $descender; // baseline
}
else
{
$y = $position->getY() + $fontSize; // baseline
}
$result = imagettftext($this->resource, $fontSize, 0, $position->getX(), $y, $textColor, $font, $utfText);
return ($result !== false);
}
/**
* @inheritDoc
*/
public function drawImageWatermark(ImageWatermark $watermark)
{
if ($this->resource === null)
{
return false;
}
if (($image = $this->loadWatermark($watermark)) === null)
{
return false;
}
$width = $this->getWidth();
$height = $this->getHeight();
$watermarkWidth = $image->getWidth();
$watermarkHeight = $image->getHeight();
$position = new Rectangle($watermarkWidth, $watermarkHeight);
$watermark->alignPosition($width, $height, $position);
$watermarkX = $position->getX();
$watermarkY = $position->getY();
$watermarkAlpha = $watermark->getAlpha();
$repeat = ($watermark->getMode() == ImageWatermark::MODE_REPEAT);
for ($y = 0; $y < $watermarkHeight; $y++)
{
for ($x = 0; $x < $watermarkWidth; $x++)
{
$posY = $watermarkY + $y;
while (true)
{
$posX = $watermarkX + $x;
while (true)
{
$alpha = $watermarkAlpha;
$mainRgb = imagecolorsforindex($this->resource, imagecolorat($this->resource, $posX, $posY));
$watermarkRgb = imagecolorsforindex($image->resource, imagecolorat($image->resource, $x, $y));
if ($watermarkRgb['alpha'] == 127)
{
$pixel = $mainRgb;
}
else
{
if ($watermarkRgb['alpha'])
{
$alpha = round((( 127 - $watermarkRgb['alpha']) / 127), 2);
$alpha = $alpha * $watermarkAlpha;
}
$pixel = [];
foreach (['red', 'green', 'blue', 'alpha'] as $k)
{
$pixel[$k] = round(($mainRgb[$k] * (1 - $alpha)) + ($watermarkRgb[$k] * $alpha));
}
}
$color = imagecolorexactalpha($this->resource, $pixel['red'], $pixel['green'], $pixel['blue'], $pixel['alpha']);
if ($color == -1)
{
$color = imagecolorallocatealpha($this->resource, $pixel['red'], $pixel['green'], $pixel['blue'], $pixel['alpha']);
if ($color === false)
{
$color = imagecolorclosestalpha($this->resource, $pixel['red'], $pixel['green'], $pixel['blue'], $pixel['alpha']);
}
}
imagesetpixel($this->resource, $posX, $posY, $color);
$posX += $watermarkWidth;
if (!$repeat || $posX > $width)
{
break;
}
}
$posY += $watermarkHeight;
if (!$repeat || $posY > $height)
{
break;
}
}
}
}
$image->clear();
return true;
}
/**
* @inheritDoc
*/
public function save($file, $quality = 95, $format = null)
{
if ($this->resource === null)
{
return false;
}
if ($format === null)
{
$format = $this->format;
}
$result = false;
switch ($format)
{
case File\Image::FORMAT_GIF:
$result = imagegif($this->resource, $file);
break;
case File\Image::FORMAT_PNG:
imagealphablending($this->resource, true);
imagesavealpha($this->resource, true);
$result = imagepng($this->resource, $file);
break;
case File\Image::FORMAT_WEBP:
imagealphablending($this->resource, true);
imagesavealpha($this->resource, true);
$result = imagewebp($this->resource, $file, $quality);
break;
case File\Image::FORMAT_BMP:
$result = imagebmp($this->resource, $file);
break;
case File\Image::FORMAT_JPEG:
$result = imagejpeg($this->resource, $file, $quality);
break;
}
return $result;
}
/**
* @inheritDoc
*/
public function getWidth()
{
return imagesx($this->resource);
}
/**
* @inheritDoc
*/
public function getHeight()
{
return imagesy($this->resource);
}
/**
* @inheritDoc
*/
public function clear()
{
if ($this->resource !== null)
{
imagedestroy($this->resource);
$this->resource = null;
}
}
/**
* @internal
* @param resource $resource
*/
public function setResource($resource)
{
$this->resource = $resource;
}
/**
* @internal
*/
public function getResource()
{
return $this->resource;
}
}