/** * Apply the manipulation with the setup options to the passed in image. * This does not do any memory manipulation * * @param WideImage_Image $image * @return WideImage_Image */ public function &apply(WideImage_Image &$image) { if (!$this->isSetup()) { throw new RokGallery_Manipulation_Exception(rc__('ROKGALLERY_MANIPULATION_WAS_NOT_SETUP_PRIOR_TO_APPLYING')); } if ($this->left == 0 && $this->top == 0 && $this->width == 0 && $this->height == 0) { $this->width = $image->getWidth(); $this->height = $image->getHeight(); } $return_image = $image->crop($this->left, $this->top, $this->width, $this->height); return $return_image; }
/** * Executes the auto-crop operation on the $img * * @param WideImage_Image $img * @param int $rgb_threshold The difference in RGB from $base_color * @param int $pixel_cutoff The number of pixels on each border that must be over $rgb_threshold * @param int $base_color The color that will get cropped * @return WideImage_Image resulting auto-cropped image */ function execute($img, $margin, $rgb_threshold, $pixel_cutoff, $base_color) { $margin = intval($margin); $rgb_threshold = intval($rgb_threshold); if ($rgb_threshold < 0) { $rgb_threshold = 0; } $pixel_cutoff = intval($pixel_cutoff); if ($pixel_cutoff <= 1) { $pixel_cutoff = 1; } if ($base_color === null) { $rgb_base = $img->getRGBAt(0, 0); } else { if ($base_color < 0) { return $img->copy(); } $rgb_base = $img->getColorRGB($base_color); } $cut_rect = array('left' => 0, 'top' => 0, 'right' => $img->getWidth() - 1, 'bottom' => $img->getHeight() - 1); for ($y = 0; $y <= $cut_rect['bottom']; $y++) { $count = 0; for ($x = 0; $x <= $cut_rect['right']; $x++) { $rgb = $img->getRGBAt($x, $y); $diff = abs($rgb['red'] - $rgb_base['red']) + abs($rgb['green'] - $rgb_base['green']) + abs($rgb['blue'] - $rgb_base['blue']); if ($diff > $rgb_threshold) { $count++; if ($count >= $pixel_cutoff) { $cut_rect['top'] = $y; break 2; } } } } for ($y = $img->getHeight() - 1; $y >= $cut_rect['top']; $y--) { $count = 0; for ($x = 0; $x <= $cut_rect['right']; $x++) { $rgb = $img->getRGBAt($x, $y); $diff = abs($rgb['red'] - $rgb_base['red']) + abs($rgb['green'] - $rgb_base['green']) + abs($rgb['blue'] - $rgb_base['blue']); if ($diff > $rgb_threshold) { $count++; if ($count >= $pixel_cutoff) { $cut_rect['bottom'] = $y; break 2; } } } } for ($x = 0; $x <= $cut_rect['right']; $x++) { $count = 0; for ($y = $cut_rect['top']; $y <= $cut_rect['bottom']; $y++) { $rgb = $img->getRGBAt($x, $y); $diff = abs($rgb['red'] - $rgb_base['red']) + abs($rgb['green'] - $rgb_base['green']) + abs($rgb['blue'] - $rgb_base['blue']); if ($diff > $rgb_threshold) { $count++; if ($count >= $pixel_cutoff) { $cut_rect['left'] = $x; break 2; } } } } for ($x = $cut_rect['right']; $x >= $cut_rect['left']; $x--) { $count = 0; for ($y = $cut_rect['top']; $y <= $cut_rect['bottom']; $y++) { $rgb = $img->getRGBAt($x, $y); $diff = abs($rgb['red'] - $rgb_base['red']) + abs($rgb['green'] - $rgb_base['green']) + abs($rgb['blue'] - $rgb_base['blue']); if ($diff > $rgb_threshold) { $count++; if ($count >= $pixel_cutoff) { $cut_rect['right'] = $x; break 2; } } } } $cut_rect = array('left' => $cut_rect['left'] - $margin, 'top' => $cut_rect['top'] - $margin, 'right' => $cut_rect['right'] + $margin, 'bottom' => $cut_rect['bottom'] + $margin); if ($cut_rect['left'] < 0) { $cut_rect['left'] = 0; } if ($cut_rect['top'] < 0) { $cut_rect['top'] = 0; } if ($cut_rect['right'] >= $img->getWidth()) { $cut_rect['right'] = $img->getWidth() - 1; } if ($cut_rect['bottom'] >= $img->getHeight()) { $cut_rect['bottom'] = $img->getHeight() - 1; } return $img->crop($cut_rect['left'], $cut_rect['top'], $cut_rect['right'] - $cut_rect['left'] + 1, $cut_rect['bottom'] - $cut_rect['top'] + 1); }
/** * Crops image * * @param int $left * @param int $top * @param int $width * @param int $height * * @return UTIL_Image */ public function cropImage($left, $top, $width, $height) { $this->image = $this->image->crop($left, $top, $width, $height); return $this; }