/** * Returns rotated image * * @param WideImage_Image $image * @param numeric $angle * @param int $bgColor * @param bool $ignoreTransparent * @return WideImage_Image */ function execute($image, $angle, $bgColor, $ignoreTransparent) { $angle = -floatval($angle); if ($angle < 0) { $angle = 360 + $angle; } $angle = $angle % 360; if ($angle == 0) { return $image->copy(); } if ($bgColor === null) { if ($image->isTransparent()) { $bgColor = $image->getTransparentColor(); } else { $tc = array('red' => 255, 'green' => 255, 'blue' => 255, 'alpha' => 127); if ($image->isTrueColor()) { $bgColor = $image->getExactColorAlpha($tc); if ($bgColor == -1) { $bgColor = $image->allocateColorAlpha($tc); } } else { $bgColor = $image->getExactColor($tc); if ($bgColor == -1) { $bgColor = $image->allocateColor($tc); } } } } return new WideImage_TrueColorImage(imagerotate($image->getHandle(), $angle, $bgColor, $ignoreTransparent)); }
/** * Returns a mask * * @param WideImage_Image $image * @return WideImage_Image */ function execute($image) { $width = $image->getWidth(); $height = $image->getHeight(); $mask = WideImage_TrueColorImage::create($width, $height); $mask->setTransparentColor(-1); $mask->alphaBlending(false); $mask->saveAlpha(false); for ($i = 0; $i <= 255; $i++) { $greyscale[$i] = ImageColorAllocate($mask->getHandle(), $i, $i, $i); } imagefilledrectangle($mask->getHandle(), 0, 0, $width, $height, $greyscale[255]); $transparentColor = $image->getTransparentColor(); $alphaToGreyRatio = 255 / 127; for ($x = 0; $x < $width; $x++) { for ($y = 0; $y < $height; $y++) { $color = $image->getColorAt($x, $y); if ($color == $transparentColor) { $rgba['alpha'] = 127; } else { $rgba = $image->getColorRGB($color); } imagesetpixel($mask->getHandle(), $x, $y, $greyscale[255 - round($rgba['alpha'] * $alphaToGreyRatio)]); } } return $mask; }
/** * Applies a mask on the copy of source image * * @param WideImage_Image $image * @param WideImage_Image $mask * @param smart_coordinate $left * @param smart_coordinate $top * @return WideImage_Image */ function execute($image, $mask, $left = 0, $top = 0) { $left = WideImage_Coordinate::fix($image->getWidth(), $left); $top = WideImage_Coordinate::fix($image->getHeight(), $top); $width = $image->getWidth(); if ($width > $mask->getWidth()) { $width = $mask->getWidth(); } $height = $image->getHeight(); if ($height > $mask->getHeight()) { $height = $mask->getHeight(); } $result = $image->asTrueColor(); $result->alphaBlending(false); $result->saveAlpha(true); $srcTransparentColor = $image->getTransparentColor(); if ($srcTransparentColor >= 0) { $trgb = $image->getColorRGB($srcTransparentColor); $trgb['alpha'] = 127; $destTransparentColor = $result->allocateColorAlpha($trgb); $result->setTransparentColor($destTransparentColor); } else { $destTransparentColor = $result->allocateColorAlpha(255, 255, 255, 127); } for ($x = 0; $x < $width; $x++) { for ($y = 0; $y < $height; $y++) { if ($left + $x < $image->getWidth() && $top + $y < $image->getHeight()) { $srcColor = $image->getColorAt($left + $x, $top + $y); if ($srcColor == $srcTransparentColor) { $destColor = $destTransparentColor; } else { $maskRGB = $mask->getRGBAt($x, $y); if ($maskRGB['red'] == 0) { $destColor = $destTransparentColor; } elseif ($srcColor >= 0) { $imageRGB = $image->getRGBAt($left + $x, $top + $y); $level = $maskRGB['red'] / 255 * (1 - $imageRGB['alpha'] / 127); $imageRGB['alpha'] = 127 - round($level * 127); if ($imageRGB['alpha'] == 127) { $destColor = $destTransparentColor; } else { $destColor = $result->allocateColorAlpha($imageRGB); } } else { $destColor = $destTransparentColor; } } $result->setColorAt($left + $x, $top + $y, $destColor); } } } return $result; }
/** * Returns a greyscale copy of an image * * @param WideImage_Image $image * @return WideImage_Image */ function execute($image) { $palette = $image instanceof WideImage_PaletteImage; $transparent = $image->isTransparent(); if ($palette && $transparent) { $tci = $image->getTransparentColor(); } $new = $image->asTrueColor(); imagefilter($new->getHandle(), IMG_FILTER_GRAYSCALE); if ($palette) { $new = $new->asPalette(); if ($transparent) { $new->setTransparentColor($tci); } } return $new; }