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<?php |
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|
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namespace Intervention\Image\Gd; |
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|
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use Intervention\Image\Exception\NotSupportedException; |
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use Intervention\Image\Image; |
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|
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class Font extends \Intervention\Image\AbstractFont |
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{ |
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/** |
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* Get font size in points |
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* |
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* @return int |
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*/ |
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protected function getPointSize() |
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{ |
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return intval(ceil($this->size * 0.75)); |
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} |
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|
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/** |
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* Filter function to access internal integer font values |
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* |
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* @return int |
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*/ |
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private function getInternalFont() |
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{ |
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$internalfont = is_null($this->file) ? 1 : $this->file; |
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$internalfont = is_numeric($internalfont) ? $internalfont : false; |
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|
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if ( ! in_array($internalfont, [1, 2, 3, 4, 5])) { |
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throw new NotSupportedException( |
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sprintf('Internal GD font (%s) not available. Use only 1-5.', $internalfont) |
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); |
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} |
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|
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return intval($internalfont); |
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} |
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|
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/** |
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* Get width of an internal font character |
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* |
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* @return int |
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*/ |
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private function getInternalFontWidth() |
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{ |
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return $this->getInternalFont() + 4; |
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} |
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|
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/** |
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* Get height of an internal font character |
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* |
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* @return int |
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*/ |
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private function getInternalFontHeight() |
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{ |
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switch ($this->getInternalFont()) { |
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case 1: |
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return 8; |
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|
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case 2: |
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return 14; |
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|
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case 3: |
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return 14; |
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|
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case 4: |
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return 16; |
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|
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case 5: |
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return 16; |
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} |
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} |
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|
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/** |
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* Calculates bounding box of current font setting |
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* |
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* @return Array |
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*/ |
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public function getBoxSize() |
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{ |
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$box = []; |
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|
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if ($this->hasApplicableFontFile()) { |
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|
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// imagettfbbox() converts numeric entities to their respective |
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// character. Preserve any originally double encoded entities to be |
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// represented as is. |
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// eg: &#160; will render   rather than its character. |
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$this->text = preg_replace('/&(#(?:x[a-fA-F0-9]+|[0-9]+);)/', '&\1', $this->text); |
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$this->text = mb_encode_numericentity($this->text, array(0x0080, 0xffff, 0, 0xffff), 'UTF-8'); |
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|
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// get bounding box with angle 0 |
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$box = imagettfbbox($this->getPointSize(), 0, $this->file, $this->text); |
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|
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// rotate points manually |
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if ($this->angle != 0) { |
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|
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$angle = pi() * 2 - $this->angle * pi() * 2 / 360; |
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|
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for ($i=0; $i<4; $i++) { |
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$x = $box[$i * 2]; |
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$y = $box[$i * 2 + 1]; |
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$box[$i * 2] = cos($angle) * $x - sin($angle) * $y; |
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$box[$i * 2 + 1] = sin($angle) * $x + cos($angle) * $y; |
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} |
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} |
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|
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$box['width'] = intval(abs($box[4] - $box[0])); |
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$box['height'] = intval(abs($box[5] - $box[1])); |
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|
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} else { |
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|
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// get current internal font size |
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$width = $this->getInternalFontWidth(); |
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$height = $this->getInternalFontHeight(); |
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|
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if (strlen($this->text) == 0) { |
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// no text -> no boxsize |
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$box['width'] = 0; |
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$box['height'] = 0; |
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} else { |
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// calculate boxsize |
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$box['width'] = strlen($this->text) * $width; |
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$box['height'] = $height; |
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} |
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} |
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|
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return $box; |
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} |
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|
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/** |
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* Draws font to given image at given position |
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* |
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* @param Image $image |
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* @param int $posx |
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* @param int $posy |
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* @return void |
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*/ |
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public function applyToImage(Image $image, $posx = 0, $posy = 0) |
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{ |
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// parse text color |
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$color = new Color($this->color); |
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|
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if ($this->hasApplicableFontFile()) { |
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|
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if ($this->angle != 0 || is_string($this->align) || is_string($this->valign)) { |
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|
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$box = $this->getBoxSize(); |
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|
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$align = is_null($this->align) ? 'left' : strtolower($this->align); |
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$valign = is_null($this->valign) ? 'bottom' : strtolower($this->valign); |
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|
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// correction on position depending on v/h alignment |
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switch ($align.'-'.$valign) { |
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|
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case 'center-top': |
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$posx = $posx - round(($box[6]+$box[4])/2); |
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$posy = $posy - round(($box[7]+$box[5])/2); |
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break; |
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|
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case 'right-top': |
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$posx = $posx - $box[4]; |
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$posy = $posy - $box[5]; |
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break; |
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|
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case 'left-top': |
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$posx = $posx - $box[6]; |
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$posy = $posy - $box[7]; |
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break; |
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|
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case 'center-center': |
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case 'center-middle': |
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$posx = $posx - round(($box[0]+$box[4])/2); |
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$posy = $posy - round(($box[1]+$box[5])/2); |
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break; |
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|
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case 'right-center': |
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case 'right-middle': |
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$posx = $posx - round(($box[2]+$box[4])/2); |
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$posy = $posy - round(($box[3]+$box[5])/2); |
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break; |
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|
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case 'left-center': |
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case 'left-middle': |
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$posx = $posx - round(($box[0]+$box[6])/2); |
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$posy = $posy - round(($box[1]+$box[7])/2); |
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break; |
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|
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case 'center-bottom': |
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$posx = $posx - round(($box[0]+$box[2])/2); |
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$posy = $posy - round(($box[1]+$box[3])/2); |
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break; |
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|
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case 'right-bottom': |
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$posx = $posx - $box[2]; |
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$posy = $posy - $box[3]; |
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break; |
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|
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case 'left-bottom': |
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$posx = $posx - $box[0]; |
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$posy = $posy - $box[1]; |
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break; |
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} |
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} |
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|
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// enable alphablending for imagettftext |
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imagealphablending($image->getCore(), true); |
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|
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// draw ttf text |
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imagettftext($image->getCore(), $this->getPointSize(), $this->angle, $posx, $posy, $color->getInt(), $this->file, $this->text); |
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|
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} else { |
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|
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// get box size |
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$box = $this->getBoxSize(); |
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$width = $box['width']; |
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$height = $box['height']; |
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|
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// internal font specific position corrections |
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if ($this->getInternalFont() == 1) { |
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$top_correction = 1; |
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$bottom_correction = 2; |
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} elseif ($this->getInternalFont() == 3) { |
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$top_correction = 2; |
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$bottom_correction = 4; |
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} else { |
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$top_correction = 3; |
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$bottom_correction = 4; |
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} |
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|
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// x-position corrections for horizontal alignment |
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switch (strtolower($this->align)) { |
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case 'center': |
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$posx = ceil($posx - ($width / 2)); |
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break; |
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|
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case 'right': |
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$posx = ceil($posx - $width) + 1; |
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break; |
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} |
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|
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// y-position corrections for vertical alignment |
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switch (strtolower($this->valign)) { |
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case 'center': |
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case 'middle': |
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$posy = ceil($posy - ($height / 2)); |
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break; |
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|
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case 'top': |
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$posy = ceil($posy - $top_correction); |
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break; |
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|
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default: |
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case 'bottom': |
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$posy = round($posy - $height + $bottom_correction); |
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break; |
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} |
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|
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// draw text |
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imagestring($image->getCore(), $this->getInternalFont(), $posx, $posy, $this->text, $color->getInt()); |
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} |
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} |
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|
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/** |
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* Set text kerning |
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* |
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* @param string $kerning |
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* @return void |
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*/ |
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public function kerning($kerning) |
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{ |
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throw new \Intervention\Image\Exception\NotSupportedException( |
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"Kerning is not supported by GD driver." |
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); |
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} |
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|
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} |
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|
