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<?php |
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namespace Elphin\IcoFileLoader; |
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/** |
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* GdRenderer renders an IconImage to a gd resource |
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* |
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* @package Elphin\IcoFileLoader |
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*/ |
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class GdRenderer implements RendererInterface |
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{ |
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public function render(IconImage $img, array $opts = null) |
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{ |
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$opts = $this->initOptions($img, $opts); |
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if ($img->isPng()) { |
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$gd = $this->renderPngImage($img, $opts['background']); |
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} else { |
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$gd = $this->renderBmpImage($img, $opts['background']); |
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} |
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if ((imagesx($gd) != $opts['w']) && (imagesy($gd) != $opts['h'])) { |
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$gd = $this->resize($gd, $opts['w'], $opts['h']); |
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} |
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return $gd; |
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} |
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protected function initOptions(IconImage $img, $opts) |
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{ |
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$opts = is_array($opts) ? $opts : []; |
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$opts['w'] = isset($opts['w']) ? $opts['w'] : $img->width; |
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$opts['h'] = isset($opts['h']) ? $opts['h'] : $img->height; |
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$opts['background'] = isset($opts['background']) ? $opts['background'] : null; |
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return $opts; |
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} |
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protected function resize($gd, $w, $h) |
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{ |
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//TODO - imagescale not available in hhvm it seems |
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$resized = imagescale($gd, $w, $h, IMG_BICUBIC_FIXED); |
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imagedestroy($gd); |
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return $resized; |
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} |
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protected function renderPngImage(IconImage $img, $hexBackgroundColor) |
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{ |
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$im = imagecreatefromstring($img->pngData); |
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imagesavealpha($im, true); |
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if (!is_null($hexBackgroundColor)) { |
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$w = $img->width; |
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$h = $img->height; |
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$gd = imagecreatetruecolor($w, $h); |
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$col = $this->parseHexColor($hexBackgroundColor); |
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$colVal = $this->allocateColor($gd, $col[0], $col[1], $col[2]); |
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imagefilledrectangle($gd, 0, 0, $w, $h, $colVal); |
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imagecopy($gd, $im, 0, 0, 0, 0, $w, $h); |
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imagedestroy($im); |
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$im = $gd; |
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} |
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return $im; |
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} |
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protected function renderBmpImage(IconImage $img, $hexBackgroundColor = null) |
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{ |
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// create image filled with desired background color |
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$w = $img->width; |
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$h = $img->height; |
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$gd = imagecreatetruecolor($w, $h); |
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if (is_null($hexBackgroundColor)) { |
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imagealphablending($gd, false); |
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$colVal = $this->allocateColor($gd, 255, 255, 255, 127); |
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imagefilledrectangle($gd, 0, 0, $w, $h, $colVal); |
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imagesavealpha($gd, true); |
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} else { |
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$col = $this->parseHexColor($hexBackgroundColor); |
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$colVal = $this->allocateColor($gd, $col[0], $col[1], $col[2]); |
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imagefilledrectangle($gd, 0, 0, $w, $h, $colVal); |
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} |
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// now paint pixels based on bit count |
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switch ($img->bitCount) { |
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case 32: |
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$this->render32bit($img, $gd); |
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break; |
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case 24: |
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$this->render24bit($img, $gd); |
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break; |
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case 8: |
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$this->render8bit($img, $gd); |
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break; |
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case 4: |
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$this->render4bit($img, $gd); |
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break; |
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case 1: |
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$this->render1bit($img, $gd); |
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break; |
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} |
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return $gd; |
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} |
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/** |
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* Allocate a color on $gd resource. This function prevents |
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* from allocating same colors on the same palette. Instead |
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* if it finds that the color is already allocated, it only |
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* returns the index to that color. |
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* It supports alpha channel. |
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* |
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* @param resource $gd gd image resource |
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* @param int $red Red component |
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* @param int $green Green component |
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* @param int $blue Blue component |
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* @param int $alpha Alpha channel |
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* |
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* @return int Color index |
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*/ |
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private function allocateColor($gd, $red, $green, $blue, $alpha = 0) |
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{ |
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$c = imagecolorexactalpha($gd, $red, $green, $blue, $alpha); |
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if ($c >= 0) { |
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return $c; |
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} |
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return imagecolorallocatealpha($gd, $red, $green, $blue, $alpha); |
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} |
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protected function parseHexColor($hexCol) |
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{ |
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if (preg_match('/^\#?([0-9a-f]{2})([0-9a-f]{2})([0-9a-f]{2})$/i', $hexCol, $c)) { |
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return [hexdec($c[1]), hexdec($c[2]), hexdec($c[3])]; |
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} else { |
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throw new \InvalidArgumentException("invalid hex colour"); |
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} |
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} |
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private function render32bit(IconImage $img, $gd) |
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{ |
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// 32 bits: 4 bytes per pixel [ B | G | R | ALPHA ]. |
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$offset = 0; |
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$binary = $img->bmpData; |
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for ($i = $img->height - 1; $i >= 0; --$i) { |
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View Code Duplication |
for ($j = 0; $j < $img->width; ++$j) { |
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//we translate the BGRA to aRGB ourselves, which is twice as fast |
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//as calling imagecolorallocatealpha |
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$alpha7 = ((~ord($binary[$offset + 3])) & 0xff) >> 1; |
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if ($alpha7 < 127) { |
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$col = ($alpha7 << 24) | |
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(ord($binary[$offset + 2]) << 16) | |
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(ord($binary[$offset + 1]) << 8) | |
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(ord($binary[$offset])); |
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imagesetpixel($gd, $j, $i, $col); |
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} |
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$offset += 4; |
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} |
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} |
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} |
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1 |
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private function render24bit(IconImage $img, $gd) |
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{ |
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// 24 bits: 3 bytes per pixel [ B | G | R ]. |
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$maskBits = $this->buildMaskBits($img); |
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$binary = $img->bmpData; |
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$offset = 0; |
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$maskpos = 0; |
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for ($i = $img->height - 1; $i >= 0; --$i) { |
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View Code Duplication |
for ($j = 0; $j < $img->width; ++$j) { |
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if ($maskBits[$maskpos] == 0) { |
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//translate BGR to RGB |
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$col = (ord($binary[$offset + 2]) << 16) | |
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(ord($binary[$offset + 1]) << 8) | |
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(ord($binary[$offset])); |
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imagesetpixel($gd, $j, $i, $col); |
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} |
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$offset += 3; |
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$maskpos++; |
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1 |
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} |
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1 |
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} |
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1 |
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} |
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4 |
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private function buildMaskBits(IconImage $img) |
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{ |
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4 |
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$width = $img->width; |
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4 |
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if (($width % 32) > 0) { |
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$width += (32 - ($img->width % 32)); |
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} |
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4 |
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$offset = $img->width * $img->height * $img->bitCount / 8; |
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4 |
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$total_bytes = ($width * $img->height) / 8; |
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4 |
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$maskBits = ''; |
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4 |
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$bytes = 0; |
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4 |
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$bytes_per_line = ($img->width / 8); |
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4 |
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$bytes_to_remove = (($width - $img->width) / 8); |
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View Code Duplication |
for ($i = 0; $i < $total_bytes; ++$i) { |
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4 |
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$maskBits .= str_pad(decbin(ord($img->bmpData[$offset + $i])), 8, '0', STR_PAD_LEFT); |
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4 |
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++$bytes; |
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4 |
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if ($bytes == $bytes_per_line) { |
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4 |
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$i += $bytes_to_remove; |
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4 |
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$bytes = 0; |
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4 |
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} |
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4 |
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} |
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4 |
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return $maskBits; |
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} |
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1 |
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private function render8bit(IconImage $img, $gd) |
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{ |
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// 8 bits: 1 byte per pixel [ COLOR INDEX ]. |
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1 |
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$palette = $this->buildPalette($img, $gd); |
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1 |
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$maskBits = $this->buildMaskBits($img); |
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1 |
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$offset = 0; |
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1 |
View Code Duplication |
for ($i = $img->height - 1; $i >= 0; --$i) { |
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1 |
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for ($j = 0; $j < $img->width; ++$j) { |
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1 |
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if ($maskBits[$offset] == 0) { |
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1 |
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$color = ord($img->bmpData[$offset]); |
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1 |
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imagesetpixel($gd, $j, $i, $palette[$color]); |
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1 |
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} |
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1 |
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++$offset; |
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1 |
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} |
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1 |
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} |
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1 |
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} |
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3 |
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private function buildPalette(IconImage $img, $gd) |
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{ |
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3 |
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$palette = []; |
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3 |
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if ($img->bitCount != 24) { |
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3 |
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$palette = []; |
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3 |
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for ($i = 0; $i < $img->colorCount; ++$i) { |
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3 |
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$palette[$i] = $this->allocateColor( |
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3 |
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$gd, |
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3 |
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$img->palette[$i]['red'], |
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3 |
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$img->palette[$i]['green'], |
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3 |
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$img->palette[$i]['blue'], |
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3 |
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round($img->palette[$i]['reserved'] / 255 * 127) |
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3 |
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); |
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3 |
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} |
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3 |
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} |
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3 |
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return $palette; |
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} |
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247
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1 |
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private function render4bit(IconImage $img, $gd) |
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248
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{ |
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249
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//4 bits: half byte/nibble per pixel [ COLOR INDEX ]. |
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250
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1 |
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$palette = $this->buildPalette($img, $gd); |
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1 |
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$maskBits = $this->buildMaskBits($img); |
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253
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1 |
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$offset = 0; |
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254
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1 |
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$maskoffset = 0; |
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255
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1 |
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for ($i = $img->height - 1; $i >= 0; --$i) { |
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256
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1 |
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for ($j = 0; $j < $img->width; $j += 2) { |
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257
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1 |
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$colorByte = ord($img->bmpData[$offset]); |
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258
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1 |
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$lowNibble = $colorByte & 0x0f; |
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259
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1 |
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$highNibble = ($colorByte & 0xf0) >> 4; |
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260
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261
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1 |
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if ($maskBits[$maskoffset++] == 0) { |
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262
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1 |
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imagesetpixel($gd, $j, $i, $palette[$highNibble]); |
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1 |
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} |
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265
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1 |
View Code Duplication |
if ($maskBits[$maskoffset++] == 0) { |
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266
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1 |
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imagesetpixel($gd, $j + 1, $i, $palette[$lowNibble]); |
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1 |
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} |
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268
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1 |
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$offset++; |
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269
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1 |
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} |
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270
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1 |
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} |
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271
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1 |
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} |
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273
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1 |
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private function render1bit(IconImage $img, $gd) |
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274
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{ |
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275
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//1 bit: 1 bit per pixel (2 colors, usually black&white) [ COLOR INDEX ]. |
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276
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1 |
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$palette = $this->buildPalette($img, $gd); |
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277
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1 |
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$maskBits = $this->buildMaskBits($img); |
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279
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280
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1 |
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$colorbits = ''; |
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281
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1 |
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$total = strlen($img->bmpData); |
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282
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1 |
View Code Duplication |
for ($i = 0; $i < $total; ++$i) { |
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283
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1 |
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$colorbits .= str_pad(decbin(ord($img->bmpData[$i])), 8, '0', STR_PAD_LEFT); |
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284
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1 |
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} |
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285
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286
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1 |
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$offset = 0; |
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287
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1 |
View Code Duplication |
for ($i = $img->height - 1; $i >= 0; --$i) { |
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288
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1 |
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for ($j = 0; $j < $img->width; ++$j) { |
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289
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1 |
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if ($maskBits[$offset] == 0) { |
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290
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1 |
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imagesetpixel($gd, $j, $i, $palette[$colorbits[$offset]]); |
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291
|
1 |
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} |
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292
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1 |
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++$offset; |
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293
|
1 |
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} |
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294
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1 |
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} |
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295
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1 |
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} |
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296
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} |
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lordelph /
icofileloader
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Duplicated code is one of the most pungent code smells. If you need to duplicate the same code in three or more different places, we strongly encourage you to look into extracting the code into a single class or operation.
You can also find more detailed suggestions in the “Code” section of your repository.