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Edit File : GD.php \| Size : 27.69 KB
<?php /** * @package dompdf * @link http://dompdf.github.com/ * @author Benj Carson <benjcarson@digitaljunkies.ca> * @author Fabien Ménager <fabien.menager@gmail.com> * @license http://www.gnu.org/copyleft/lesser.html GNU Lesser General Public License / namespace Dompdf\Adapter; use Dompdf\Canvas; use Dompdf\Dompdf; use Dompdf\Image\Cache; use Dompdf\Helpers; /* * Image rendering interface * * Renders to an image format supported by GD (jpeg, gif, png, xpm). * Not super-useful day-to-day but handy nonetheless * * @package dompdf / class GD implements Canvas { /* * @var Dompdf / private $_dompdf; /* * Resource handle for the image * * @var resource / private $_img; /* * Resource handle for the image * * @var resource[] / private $_imgs; /* * Apparent canvas width in pixels * * @var int / private $_width; /* * Apparent canvas height in pixels * * @var int / private $_height; /* * Actual image width in pixels * * @var int / private $_actual_width; /* * Actual image height in pixels * * @var int / private $_actual_height; /* * Current page number * * @var int / private $_page_number; /* * Total number of pages * * @var int / private $_page_count; /* * Image antialias factor * * @var float / private $_aa_factor; /* * Allocated colors * * @var array / private $_colors; /* * Background color * * @var int / private $_bg_color; /* * Background color array * * @var int / private $_bg_color_array; /* * Actual DPI * * @var int / private $dpi; /* * Amount to scale font sizes * * Font sizes are 72 DPI, GD internally uses 96. Scale them proportionally. * 72 / 96 = 0.75. * * @var float / const FONT_SCALE = 0.75; /* * Class constructor * * @param mixed $size The size of image to create: array(x1,y1,x2,y2) or "letter", "legal", etc. * @param string $orientation The orientation of the document (either 'landscape' or 'portrait') * @param Dompdf $dompdf * @param float $aa_factor Anti-aliasing factor, 1 for no AA * @param array $bg_color Image background color: array(r,g,b,a), 0 <= r,g,b,a <= 1 / public function __construct($size = 'letter', $orientation = "portrait", Dompdf $dompdf, $aa_factor = 1.0, $bg_color = array(1, 1, 1, 0)) { if (!is_array($size)) { $size = strtolower($size); if (isset(CPDF::$PAPER_SIZES[$size])) { $size = CPDF::$PAPER_SIZES[$size]; } else { $size = CPDF::$PAPER_SIZES["letter"]; } } if (strtolower($orientation) === "landscape") { list($size[2], $size[3]) = array($size[3], $size[2]); } $this->_dompdf = $dompdf; $this->dpi = $this->get_dompdf()->getOptions()->getDpi(); if ($aa_factor < 1) { $aa_factor = 1; } $this->_aa_factor = $aa_factor; $size[2] = $aa_factor; $size[3] = $aa_factor; $this->_width = $size[2] - $size[0]; $this->_height = $size[3] - $size[1]; $this->_actual_width = $this->_upscale($this->_width); $this->_actual_height = $this->_upscale($this->_height); if (is_null($bg_color) \|\| !is_array($bg_color)) { // Pure white bg $bg_color = array(1, 1, 1, 0); } $this->_bg_color_array = $bg_color; $this->new_page(); } /* * @return Dompdf / public function get_dompdf() { return $this->_dompdf; } /* * Return the GF image resource * * @return resource / public function get_image() { return $this->_img; } /* * Return the image's width in pixels * * @return float / public function get_width() { return $this->_width / $this->_aa_factor; } /* * Return the image's height in pixels * * @return float / public function get_height() { return $this->_height / $this->_aa_factor; } /* * Returns the current page number * @return int / public function get_page_number() { return $this->_page_number; } /* * Returns the total number of pages in the document * @return int / public function get_page_count() { return $this->_page_count; } /* * Sets the current page number * * @param int $num / public function set_page_number($num) { $this->_page_number = $num; } /* * Sets the page count * * @param int $count / public function set_page_count($count) { $this->_page_count = $count; } /* * Sets the opacity * * @param $opacity * @param $mode / public function set_opacity($opacity, $mode = "Normal") { // FIXME } /* * Allocate a new color. Allocate with GD as needed and store * previously allocated colors in $this->_colors. * * @param array $color The new current color * @return int The allocated color / private function _allocate_color($color) { $a = isset($color["alpha"]) ? $color["alpha"] : 1; if (isset($color["c"])) { $color = Helpers::cmyk_to_rgb($color); } list($r, $g, $b) = $color; $r = 255; $g = 255; $b = 255; $a = 127 - ($a * 127); // Clip values $r = $r > 255 ? 255 : $r; $g = $g > 255 ? 255 : $g; $b = $b > 255 ? 255 : $b; $a = $a > 127 ? 127 : $a; $r = $r < 0 ? 0 : $r; $g = $g < 0 ? 0 : $g; $b = $b < 0 ? 0 : $b; $a = $a < 0 ? 0 : $a; $key = sprintf("#%02X%02X%02X%02X", $r, $g, $b, $a); if (isset($this->_colors[$key])) { return $this->_colors[$key]; } if ($a != 0) { $this->_colors[$key] = imagecolorallocatealpha($this->get_image(), $r, $g, $b, $a); } else { $this->_colors[$key] = imagecolorallocate($this->get_image(), $r, $g, $b); } return $this->_colors[$key]; } /** * Scales value up to the current canvas DPI from 72 DPI * * @param float $length * @return float / private function _upscale($length) { return ($length $this->dpi) / 72 * $this->_aa_factor; } /** * Scales value down from the current canvas DPI to 72 DPI * * @param float $length * @return float / private function _downscale($length) { return ($length / $this->dpi 72) / $this->_aa_factor; } /** * Draws a line from x1,y1 to x2,y2 * * See {@link Style::munge_color()} for the format of the color array. * See {@link Cpdf::setLineStyle()} for a description of the format of the * $style parameter (aka dash). * * @param float $x1 * @param float $y1 * @param float $x2 * @param float $y2 * @param array $color * @param float $width * @param array $style / public function line($x1, $y1, $x2, $y2, $color, $width, $style = null) { // Scale by the AA factor and DPI $x1 = $this->_upscale($x1); $y1 = $this->_upscale($y1); $x2 = $this->_upscale($x2); $y2 = $this->_upscale($y2); $width = $this->_upscale($width); $c = $this->_allocate_color($color); // Convert the style array if required if (is_array($style) && count($style) > 0) { $gd_style = array(); if (count($style) == 1) { for ($i = 0; $i < $style[0] $this->_aa_factor; $i++) { $gd_style[] = $c; } for ($i = 0; $i < $style[0] * $this->_aa_factor; $i++) { $gd_style[] = $this->_bg_color; } } else { $i = 0; foreach ($style as $length) { if ($i % 2 == 0) { // 'On' pattern for ($i = 0; $i < $style[0] * $this->_aa_factor; $i++) { $gd_style[] = $c; } } else { // Off pattern for ($i = 0; $i < $style[0] * $this->_aa_factor; $i++) { $gd_style[] = $this->_bg_color; } } $i++; } } if (!empty($gd_style)) { imagesetstyle($this->get_image(), $gd_style); $c = IMG_COLOR_STYLED; } } imagesetthickness($this->get_image(), $width); imageline($this->get_image(), $x1, $y1, $x2, $y2, $c); } /** * @param float $x1 * @param float $y1 * @param float $r1 * @param float $r2 * @param float $astart * @param float $aend * @param array $color * @param float $width * @param array $style / public function arc($x1, $y1, $r1, $r2, $astart, $aend, $color, $width, $style = array()) { // @todo } /* * Draws a rectangle at x1,y1 with width w and height h * * See {@link Style::munge_color()} for the format of the color array. * See {@link Cpdf::setLineStyle()} for a description of the $style * parameter (aka dash) * * @param float $x1 * @param float $y1 * @param float $w * @param float $h * @param array $color * @param float $width * @param array $style / public function rectangle($x1, $y1, $w, $h, $color, $width, $style = null) { // Scale by the AA factor and DPI $x1 = $this->_upscale($x1); $y1 = $this->_upscale($y1); $w = $this->_upscale($w); $h = $this->_upscale($h); $width = $this->_upscale($width); $c = $this->_allocate_color($color); // Convert the style array if required if (is_array($style) && count($style) > 0) { $gd_style = array(); foreach ($style as $length) { for ($i = 0; $i < $length; $i++) { $gd_style[] = $c; } } if (!empty($gd_style)) { imagesetstyle($this->get_image(), $gd_style); $c = IMG_COLOR_STYLED; } } imagesetthickness($this->get_image(), $width); imagerectangle($this->get_image(), $x1, $y1, $x1 + $w, $y1 + $h, $c); } /* * Draws a filled rectangle at x1,y1 with width w and height h * * See {@link Style::munge_color()} for the format of the color array. * * @param float $x1 * @param float $y1 * @param float $w * @param float $h * @param array $color / public function filled_rectangle($x1, $y1, $w, $h, $color) { // Scale by the AA factor and DPI $x1 = $this->_upscale($x1); $y1 = $this->_upscale($y1); $w = $this->_upscale($w); $h = $this->_upscale($h); $c = $this->_allocate_color($color); imagefilledrectangle($this->get_image(), $x1, $y1, $x1 + $w, $y1 + $h, $c); } /* * Starts a clipping rectangle at x1,y1 with width w and height h * * @param float $x1 * @param float $y1 * @param float $w * @param float $h / public function clipping_rectangle($x1, $y1, $w, $h) { // @todo } public function clipping_roundrectangle($x1, $y1, $w, $h, $rTL, $rTR, $rBR, $rBL) { // @todo } /* * Ends the last clipping shape / public function clipping_end() { // @todo } /* * / public function save() { $this->get_dompdf()->getOptions()->setDpi(72); } /* * / public function restore() { $this->get_dompdf()->getOptions()->setDpi($this->dpi); } /* * @param $angle * @param $x * @param $y / public function rotate($angle, $x, $y) { // @todo } /* * @param $angle_x * @param $angle_y * @param $x * @param $y / public function skew($angle_x, $angle_y, $x, $y) { // @todo } /* * @param $s_x * @param $s_y * @param $x * @param $y / public function scale($s_x, $s_y, $x, $y) { // @todo } /* * @param $t_x * @param $t_y / public function translate($t_x, $t_y) { // @todo } /* * @param $a * @param $b * @param $c * @param $d * @param $e * @param $f / public function transform($a, $b, $c, $d, $e, $f) { // @todo } /* * Draws a polygon * * The polygon is formed by joining all the points stored in the $points * array. $points has the following structure: * <code> * array(0 => x1, * 1 => y1, * 2 => x2, * 3 => y2, * ... * ); * </code> * * See {@link Style::munge_color()} for the format of the color array. * See {@link Cpdf::setLineStyle()} for a description of the $style * parameter (aka dash) * * @param array $points * @param array $color * @param float $width * @param array $style * @param bool $fill Fills the polygon if true / public function polygon($points, $color, $width = null, $style = null, $fill = false) { // Scale each point by the AA factor and DPI foreach (array_keys($points) as $i) { $points[$i] = $this->_upscale($points[$i]); } $c = $this->_allocate_color($color); // Convert the style array if required if (is_array($style) && count($style) > 0 && !$fill) { $gd_style = array(); foreach ($style as $length) { for ($i = 0; $i < $length; $i++) { $gd_style[] = $c; } } if (!empty($gd_style)) { imagesetstyle($this->get_image(), $gd_style); $c = IMG_COLOR_STYLED; } } imagesetthickness($this->get_image(), $width); if ($fill) { imagefilledpolygon($this->get_image(), $points, count($points) / 2, $c); } else { imagepolygon($this->get_image(), $points, count($points) / 2, $c); } } /* * Draws a circle at $x,$y with radius $r * * See {@link Style::munge_color()} for the format of the color array. * See {@link Cpdf::setLineStyle()} for a description of the $style * parameter (aka dash) * * @param float $x * @param float $y * @param float $r * @param array $color * @param float $width * @param array $style * @param bool $fill Fills the circle if true / public function circle($x, $y, $r, $color, $width = null, $style = null, $fill = false) { // Scale by the AA factor and DPI $x = $this->_upscale($x); $y = $this->_upscale($y); $r = $this->_upscale($r); $c = $this->_allocate_color($color); // Convert the style array if required if (is_array($style) && count($style) > 0 && !$fill) { $gd_style = array(); foreach ($style as $length) { for ($i = 0; $i < $length; $i++) { $gd_style[] = $c; } } if (!empty($gd_style)) { imagesetstyle($this->get_image(), $gd_style); $c = IMG_COLOR_STYLED; } } imagesetthickness($this->get_image(), $width); if ($fill) { imagefilledellipse($this->get_image(), $x, $y, $r, $r, $c); } else { imageellipse($this->get_image(), $x, $y, $r, $r, $c); } } /* * Add an image to the pdf. * The image is placed at the specified x and y coordinates with the * given width and height. * * @param string $img_url the path to the image * @param float $x x position * @param float $y y position * @param int $w width (in pixels) * @param int $h height (in pixels) * @param string $resolution * @return void * * @throws \Exception * @internal param string $img_type the type (e.g. extension) of the image / public function image($img_url, $x, $y, $w, $h, $resolution = "normal") { $img_type = Cache::detect_type($img_url, $this->get_dompdf()->getHttpContext()); if (!$img_type) { return; } $func_name = "imagecreatefrom$img_type"; if (!function_exists($func_name)) { if (!method_exists("Dompdf\Helpers", $func_name)) { throw new \Exception("Function $func_name() not found. Cannot convert $img_type image: $img_url. Please install the image PHP extension."); } $func_name = "\\Dompdf\\Helpers::" . $func_name; } $src = @call_user_func($func_name, $img_url); if (!$src) { return; // Probably should add to $_dompdf_errors or whatever here } // Scale by the AA factor and DPI $x = $this->_upscale($x); $y = $this->_upscale($y); $w = $this->_upscale($w); $h = $this->_upscale($h); $img_w = imagesx($src); $img_h = imagesy($src); imagecopyresampled($this->get_image(), $src, $x, $y, 0, 0, $w, $h, $img_w, $img_h); } /* * Writes text at the specified x and y coordinates * See {@link Style::munge_color()} for the format of the color array. * * @param float $x * @param float $y * @param string $text the text to write * @param string $font the font file to use * @param float $size the font size, in points * @param array $color * @param float $word_spacing word spacing adjustment * @param float $char_spacing * @param float $angle Text angle * * @return void / public function text($x, $y, $text, $font, $size, $color = array(0, 0, 0), $word_spacing = 0.0, $char_spacing = 0.0, $angle = 0.0) { // Scale by the AA factor and DPI $x = $this->_upscale($x); $y = $this->_upscale($y); $size = $this->_upscale($size) self::FONT_SCALE; $h = $this->get_font_height_actual($font, $size); $c = $this->_allocate_color($color); // imagettftext() converts numeric entities to their respective // character. Preserve any originally double encoded entities to be // represented as is. // eg: &#160; will render   rather than its character. $text = preg_replace('/&(#(?:x[a-fA-F0-9]+\|[0-9]+);)/', '&\1', $text); $text = mb_encode_numericentity($text, array(0x0080, 0xff, 0, 0xff), 'UTF-8'); $font = $this->get_ttf_file($font); // FIXME: word spacing imagettftext($this->get_image(), $size, $angle, $x, $y + $h, $c, $font, $text); } public function javascript($code) { // Not implemented } /** * Add a named destination (similar to <a name="foo">...</a> in html) * * @param string $anchorname The name of the named destination / public function add_named_dest($anchorname) { // Not implemented } /* * Add a link to the pdf * * @param string $url The url to link to * @param float $x The x position of the link * @param float $y The y position of the link * @param float $width The width of the link * @param float $height The height of the link / public function add_link($url, $x, $y, $width, $height) { // Not implemented } /* * Add meta information to the PDF * * @param string $label label of the value (Creator, Producer, etc.) * @param string $value the text to set / public function add_info($label, $value) { // N/A } /* * @param string $view * @param array $options / public function set_default_view($view, $options = array()) { // N/A } /* * Calculates text size, in points * * @param string $text the text to be sized * @param string $font the desired font * @param float $size the desired font size * @param float $word_spacing word spacing, if any * @param float $char_spacing char spacing, if any * * @return float / public function get_text_width($text, $font, $size, $word_spacing = 0.0, $char_spacing = 0.0) { $font = $this->get_ttf_file($font); $size = $this->_upscale($size) self::FONT_SCALE; // imagettfbbox() converts numeric entities to their respective // character. Preserve any originally double encoded entities to be // represented as is. // eg: &#160; will render   rather than its character. $text = preg_replace('/&(#(?:x[a-fA-F0-9]+\|[0-9]+);)/', '&\1', $text); $text = mb_encode_numericentity($text, array(0x0080, 0xffff, 0, 0xffff), 'UTF-8'); // FIXME: word spacing list($x1, , $x2) = imagettfbbox($size, 0, $font, $text); // Add additional 1pt to prevent text overflow issues return $this->_downscale($x2 - $x1) + 1; } /** * @param $font * @return string / public function get_ttf_file($font) { if ( stripos($font, ".ttf") === false ) { $font .= ".ttf"; } if (!file_exists($font)) { $font_metrics = $this->_dompdf->getFontMetrics(); $font = $font_metrics->getFont($this->_dompdf->getOptions()->getDefaultFont()) . ".ttf"; if (!file_exists($font)) { if (strpos($font, "mono")) { $font = $font_metrics->getFont("DejaVu Mono") . ".ttf"; } elseif (strpos($font, "sans") !== false) { $font = $font_metrics->getFont("DejaVu Sans") . ".ttf"; } elseif (strpos($font, "serif")) { $font = $font_metrics->getFont("DejaVu Serif") . ".ttf"; } else { $font = $font_metrics->getFont("DejaVu Sans") . ".ttf"; } } } return $font; } /* * Calculates font height, in points * * @param string $font * @param float $size * @return float / public function get_font_height($font, $size) { $size = $this->_upscale($size) self::FONT_SCALE; $height = $this->get_font_height_actual($font, $size); return $this->_downscale($height); } private function get_font_height_actual($font, $size) { $font = $this->get_ttf_file($font); $ratio = $this->_dompdf->getOptions()->getFontHeightRatio(); // FIXME: word spacing list(, $y2, , , , $y1) = imagettfbbox($size, 0, $font, "MXjpqytfhl"); // Test string with ascenders, descenders and caps return ($y2 - $y1) * $ratio; } /** * @param string $font * @param float $size * @return float / public function get_font_baseline($font, $size) { $ratio = $this->_dompdf->getOptions()->getFontHeightRatio(); return $this->get_font_height($font, $size) / $ratio; } /* * Starts a new page * * Subsequent drawing operations will appear on the new page. / public function new_page() { $this->_page_number++; $this->_page_count++; $this->_img = imagecreatetruecolor($this->_actual_width, $this->_actual_height); $this->_bg_color = $this->_allocate_color($this->_bg_color_array); imagealphablending($this->_img, true); imagesavealpha($this->_img, true); imagefill($this->_img, 0, 0, $this->_bg_color); $this->_imgs[] = $this->_img; } public function open_object() { // N/A } public function close_object() { // N/A } public function add_object() { // N/A } public function page_text() { // N/A } public function page_line() { // N/A } /* * Streams the image to the client. * * @param string $filename The filename to present to the client. * @param array $options Associative array: 'type' => jpeg\|jpg\|png; 'quality' => 0 - 100 (JPEG only); * 'page' => Number of the page to output (defaults to the first); 'Attachment': 1 or 0 (default 1). / public function stream($filename, $options = array()) { if (headers_sent()) { die("Unable to stream image: headers already sent"); } if (!isset($options["type"])) $options["type"] = "png"; if (!isset($options["Attachment"])) $options["Attachment"] = true; $type = strtolower($options["type"]); switch ($type) { case "jpg": case "jpeg": $contentType = "image/jpeg"; $extension = ".jpg"; break; case "png": default: $contentType = "image/png"; $extension = ".png"; break; } header("Cache-Control: private"); header("Content-Type: $contentType"); $filename = str_replace(array("\n", "'"), "", basename($filename, ".$type")) . $extension; $attachment = $options["Attachment"] ? "attachment" : "inline"; header(Helpers::buildContentDispositionHeader($attachment, $filename)); $this->_output($options); flush(); } /* * Returns the image as a string. * * @param array $options Associative array: 'type' => jpeg\|jpg\|png; 'quality' => 0 - 100 (JPEG only); * 'page' => Number of the page to output (defaults to the first). * @return string / public function output($options = array()) { ob_start(); $this->_output($options); return ob_get_clean(); } /* * Outputs the image stream directly. * * @param array $options Associative array: 'type' => jpeg\|jpg\|png; 'quality' => 0 - 100 (JPEG only); * 'page' => Number of the page to output (defaults to the first). */ private function _output($options = array()) { if (!isset($options["type"])) $options["type"] = "png"; if (!isset($options["page"])) $options["page"] = 1; $type = strtolower($options["type"]); if (isset($this->_imgs[$options["page"] - 1])) { $img = $this->_imgs[$options["page"] - 1]; } else { $img = $this->_imgs[0]; } // Perform any antialiasing if ($this->_aa_factor != 1) { $dst_w = $this->_actual_width / $this->_aa_factor; $dst_h = $this->_actual_height / $this->_aa_factor; $dst = imagecreatetruecolor($dst_w, $dst_h); imagecopyresampled($dst, $img, 0, 0, 0, 0, $dst_w, $dst_h, $this->_actual_width, $this->_actual_height); } else { $dst = $img; } switch ($type) { case "jpg": case "jpeg": if (!isset($options["quality"])) { $options["quality"] = 75; } imagejpeg($dst, null, $options["quality"]); break; case "png": default: imagepng($dst); break; } if ($this->_aa_factor != 1) { imagedestroy($dst); } } } Back

Edit File : GD.php | Size : 27.69 KB

<?php
/**
 * @package dompdf
 * @link    http://dompdf.github.com/
 * @author  Benj Carson <benjcarson@digitaljunkies.ca>
 * @author  Fabien Ménager <fabien.menager@gmail.com>
 * @license http://www.gnu.org/copyleft/lesser.html GNU Lesser General Public License
 */
namespace Dompdf\Adapter;

use Dompdf\Canvas;
use Dompdf\Dompdf;
use Dompdf\Image\Cache;
use Dompdf\Helpers;

/**
 * Image rendering interface
 *
 * Renders to an image format supported by GD (jpeg, gif, png, xpm).
 * Not super-useful day-to-day but handy nonetheless
 *
 * @package dompdf
 */
class GD implements Canvas
{
    /**
     * @var Dompdf
     */
    private $_dompdf;

/**
     * Resource handle for the image
     *
     * @var resource
     */
    private $_img;

/**
     * Resource handle for the image
     *
     * @var resource[]
     */
    private $_imgs;

/**
     * Apparent canvas width in pixels
     *
     * @var int
     */
    private $_width;

/**
     * Apparent canvas height in pixels
     *
     * @var int
     */
    private $_height;

/**
     * Actual image width in pixels
     *
     * @var int
     */
    private $_actual_width;

/**
     * Actual image height in pixels
     *
     * @var int
     */
    private $_actual_height;

/**
     * Current page number
     *
     * @var int
     */
    private $_page_number;

/**
     * Total number of pages
     *
     * @var int
     */
    private $_page_count;

/**
     * Image antialias factor
     *
     * @var float
     */
    private $_aa_factor;

/**
     * Allocated colors
     *
     * @var array
     */
    private $_colors;

/**
     * Background color
     *
     * @var int
     */
    private $_bg_color;

/**
     * Background color array
     *
     * @var int
     */
    private $_bg_color_array;

/**
     * Actual DPI
     *
     * @var int
     */
    private $dpi;

/**
     * Amount to scale font sizes
     *
     * Font sizes are 72 DPI, GD internally uses 96. Scale them proportionally.
     * 72 / 96 = 0.75.
     *
     * @var float
     */
    const FONT_SCALE = 0.75;

/**
     * Class constructor
     *
     * @param mixed $size The size of image to create: array(x1,y1,x2,y2) or "letter", "legal", etc.
     * @param string $orientation The orientation of the document (either 'landscape' or 'portrait')
     * @param Dompdf $dompdf
     * @param float $aa_factor Anti-aliasing factor, 1 for no AA
     * @param array $bg_color Image background color: array(r,g,b,a), 0 <= r,g,b,a <= 1
     */
    public function __construct($size = 'letter', $orientation = "portrait", Dompdf $dompdf, $aa_factor = 1.0, $bg_color = array(1, 1, 1, 0))
    {

if (!is_array($size)) {
            $size = strtolower($size);

if (isset(CPDF::$PAPER_SIZES[$size])) {
                $size = CPDF::$PAPER_SIZES[$size];
            } else {
                $size = CPDF::$PAPER_SIZES["letter"];
            }
        }

if (strtolower($orientation) === "landscape") {
            list($size[2], $size[3]) = array($size[3], $size[2]);
        }

$this->_dompdf = $dompdf;

$this->dpi = $this->get_dompdf()->getOptions()->getDpi();

if ($aa_factor < 1) {
            $aa_factor = 1;
        }

$this->_aa_factor = $aa_factor;

$size[2] *= $aa_factor;
        $size[3] *= $aa_factor;

$this->_width = $size[2] - $size[0];
        $this->_height = $size[3] - $size[1];

$this->_actual_width = $this->_upscale($this->_width);
        $this->_actual_height = $this->_upscale($this->_height);

if (is_null($bg_color) || !is_array($bg_color)) {
            // Pure white bg
            $bg_color = array(1, 1, 1, 0);
        }

$this->_bg_color_array = $bg_color;

$this->new_page();
    }

/**
     * @return Dompdf
     */
    public function get_dompdf()
    {
        return $this->_dompdf;
    }

/**
     * Return the GF image resource
     *
     * @return resource
     */
    public function get_image()
    {
        return $this->_img;
    }

/**
     * Return the image's width in pixels
     *
     * @return float
     */
    public function get_width()
    {
        return $this->_width / $this->_aa_factor;
    }

/**
     * Return the image's height in pixels
     *
     * @return float
     */
    public function get_height()
    {
        return $this->_height / $this->_aa_factor;
    }

/**
     * Returns the current page number
     * @return int
     */
    public function get_page_number()
    {
        return $this->_page_number;
    }

/**
     * Returns the total number of pages in the document
     * @return int
     */
    public function get_page_count()
    {
        return $this->_page_count;
    }

/**
     * Sets the current page number
     *
     * @param int $num
     */
    public function set_page_number($num)
    {
        $this->_page_number = $num;
    }

/**
     * Sets the page count
     *
     * @param int $count
     */
    public function set_page_count($count)
    {
        $this->_page_count = $count;
    }

/**
     * Sets the opacity
     *
     * @param $opacity
     * @param $mode
     */
    public function set_opacity($opacity, $mode = "Normal")
    {
        // FIXME
    }

/**
     * Allocate a new color.  Allocate with GD as needed and store
     * previously allocated colors in $this->_colors.
     *
     * @param array $color The new current color
     * @return int           The allocated color
     */
    private function _allocate_color($color)
    {
        $a = isset($color["alpha"]) ? $color["alpha"] : 1;

if (isset($color["c"])) {
            $color = Helpers::cmyk_to_rgb($color);
        }

list($r, $g, $b) = $color;

$r *= 255;
        $g *= 255;
        $b *= 255;
        $a = 127 - ($a * 127);

// Clip values
        $r = $r > 255 ? 255 : $r;
        $g = $g > 255 ? 255 : $g;
        $b = $b > 255 ? 255 : $b;
        $a = $a > 127 ? 127 : $a;

$r = $r < 0 ? 0 : $r;
        $g = $g < 0 ? 0 : $g;
        $b = $b < 0 ? 0 : $b;
        $a = $a < 0 ? 0 : $a;

$key = sprintf("#%02X%02X%02X%02X", $r, $g, $b, $a);

if (isset($this->_colors[$key])) {
            return $this->_colors[$key];
        }

if ($a != 0) {
            $this->_colors[$key] = imagecolorallocatealpha($this->get_image(), $r, $g, $b, $a);
        } else {
            $this->_colors[$key] = imagecolorallocate($this->get_image(), $r, $g, $b);
        }

return $this->_colors[$key];
    }

/**
     * Scales value up to the current canvas DPI from 72 DPI
     *
     * @param float $length
     * @return float
     */
    private function _upscale($length)
    {
        return ($length * $this->dpi) / 72 * $this->_aa_factor;
    }

/**
     * Scales value down from the current canvas DPI to 72 DPI
     *
     * @param float $length
     * @return float
     */
    private function _downscale($length)
    {
        return ($length / $this->dpi * 72) / $this->_aa_factor;
    }

/**
     * Draws a line from x1,y1 to x2,y2
     *
     * See {@link Style::munge_color()} for the format of the color array.
     * See {@link Cpdf::setLineStyle()} for a description of the format of the
     * $style parameter (aka dash).
     *
     * @param float $x1
     * @param float $y1
     * @param float $x2
     * @param float $y2
     * @param array $color
     * @param float $width
     * @param array $style
     */
    public function line($x1, $y1, $x2, $y2, $color, $width, $style = null)
    {

// Scale by the AA factor and DPI
        $x1 = $this->_upscale($x1);
        $y1 = $this->_upscale($y1);
        $x2 = $this->_upscale($x2);
        $y2 = $this->_upscale($y2);
        $width = $this->_upscale($width);

$c = $this->_allocate_color($color);

// Convert the style array if required
        if (is_array($style) && count($style) > 0) {
            $gd_style = array();

if (count($style) == 1) {
                for ($i = 0; $i < $style[0] * $this->_aa_factor; $i++) {
                    $gd_style[] = $c;
                }

for ($i = 0; $i < $style[0] * $this->_aa_factor; $i++) {
                    $gd_style[] = $this->_bg_color;
                }
            } else {
                $i = 0;
                foreach ($style as $length) {
                    if ($i % 2 == 0) {
                        // 'On' pattern
                        for ($i = 0; $i < $style[0] * $this->_aa_factor; $i++) {
                            $gd_style[] = $c;
                        }

} else {
                        // Off pattern
                        for ($i = 0; $i < $style[0] * $this->_aa_factor; $i++) {
                            $gd_style[] = $this->_bg_color;
                        }
                    }
                    $i++;
                }
            }

if (!empty($gd_style)) {
                imagesetstyle($this->get_image(), $gd_style);
                $c = IMG_COLOR_STYLED;
            }
        }

imagesetthickness($this->get_image(), $width);

imageline($this->get_image(), $x1, $y1, $x2, $y2, $c);
    }

/**
     * @param float $x1
     * @param float $y1
     * @param float $r1
     * @param float $r2
     * @param float $astart
     * @param float $aend
     * @param array $color
     * @param float $width
     * @param array $style
     */
    public function arc($x1, $y1, $r1, $r2, $astart, $aend, $color, $width, $style = array())
    {
        // @todo
    }

/**
     * Draws a rectangle at x1,y1 with width w and height h
     *
     * See {@link Style::munge_color()} for the format of the color array.
     * See {@link Cpdf::setLineStyle()} for a description of the $style
     * parameter (aka dash)
     *
     * @param float $x1
     * @param float $y1
     * @param float $w
     * @param float $h
     * @param array $color
     * @param float $width
     * @param array $style
     */
    public function rectangle($x1, $y1, $w, $h, $color, $width, $style = null)
    {

// Scale by the AA factor and DPI
        $x1 = $this->_upscale($x1);
        $y1 = $this->_upscale($y1);
        $w = $this->_upscale($w);
        $h = $this->_upscale($h);
        $width = $this->_upscale($width);

$c = $this->_allocate_color($color);

// Convert the style array if required
        if (is_array($style) && count($style) > 0) {
            $gd_style = array();

foreach ($style as $length) {
                for ($i = 0; $i < $length; $i++) {
                    $gd_style[] = $c;
                }
            }

if (!empty($gd_style)) {
                imagesetstyle($this->get_image(), $gd_style);
                $c = IMG_COLOR_STYLED;
            }
        }

imagesetthickness($this->get_image(), $width);

imagerectangle($this->get_image(), $x1, $y1, $x1 + $w, $y1 + $h, $c);
    }

/**
     * Draws a filled rectangle at x1,y1 with width w and height h
     *
     * See {@link Style::munge_color()} for the format of the color array.
     *
     * @param float $x1
     * @param float $y1
     * @param float $w
     * @param float $h
     * @param array $color
     */
    public function filled_rectangle($x1, $y1, $w, $h, $color)
    {
        // Scale by the AA factor and DPI
        $x1 = $this->_upscale($x1);
        $y1 = $this->_upscale($y1);
        $w = $this->_upscale($w);
        $h = $this->_upscale($h);

$c = $this->_allocate_color($color);

imagefilledrectangle($this->get_image(), $x1, $y1, $x1 + $w, $y1 + $h, $c);
    }

/**
     * Starts a clipping rectangle at x1,y1 with width w and height h
     *
     * @param float $x1
     * @param float $y1
     * @param float $w
     * @param float $h
     */
    public function clipping_rectangle($x1, $y1, $w, $h)
    {
        // @todo
    }

public function clipping_roundrectangle($x1, $y1, $w, $h, $rTL, $rTR, $rBR, $rBL)
    {
        // @todo
    }

/**
     * Ends the last clipping shape
     */
    public function clipping_end()
    {
        // @todo
    }

/**
     *
     */
    public function save()
    {
        $this->get_dompdf()->getOptions()->setDpi(72);
    }

/**
     *
     */
    public function restore()
    {
        $this->get_dompdf()->getOptions()->setDpi($this->dpi);
    }

/**
     * @param $angle
     * @param $x
     * @param $y
     */
    public function rotate($angle, $x, $y)
    {
        // @todo
    }

/**
     * @param $angle_x
     * @param $angle_y
     * @param $x
     * @param $y
     */
    public function skew($angle_x, $angle_y, $x, $y)
    {
        // @todo
    }

/**
     * @param $s_x
     * @param $s_y
     * @param $x
     * @param $y
     */
    public function scale($s_x, $s_y, $x, $y)
    {
        // @todo
    }

/**
     * @param $t_x
     * @param $t_y
     */
    public function translate($t_x, $t_y)
    {
        // @todo
    }

/**
     * @param $a
     * @param $b
     * @param $c
     * @param $d
     * @param $e
     * @param $f
     */
    public function transform($a, $b, $c, $d, $e, $f)
    {
        // @todo
    }

/**
     * Draws a polygon
     *
     * The polygon is formed by joining all the points stored in the $points
     * array.  $points has the following structure:
     * <code>
     * array(0 => x1,
     *       1 => y1,
     *       2 => x2,
     *       3 => y2,
     *       ...
     *       );
     * </code>
     *
     * See {@link Style::munge_color()} for the format of the color array.
     * See {@link Cpdf::setLineStyle()} for a description of the $style
     * parameter (aka dash)
     *
     * @param array $points
     * @param array $color
     * @param float $width
     * @param array $style
     * @param bool $fill Fills the polygon if true
     */
    public function polygon($points, $color, $width = null, $style = null, $fill = false)
    {

// Scale each point by the AA factor and DPI
        foreach (array_keys($points) as $i) {
            $points[$i] = $this->_upscale($points[$i]);
        }

$c = $this->_allocate_color($color);

// Convert the style array if required
        if (is_array($style) && count($style) > 0 && !$fill) {
            $gd_style = array();

foreach ($style as $length) {
                for ($i = 0; $i < $length; $i++) {
                    $gd_style[] = $c;
                }
            }

if (!empty($gd_style)) {
                imagesetstyle($this->get_image(), $gd_style);
                $c = IMG_COLOR_STYLED;
            }
        }

imagesetthickness($this->get_image(), $width);

if ($fill) {
            imagefilledpolygon($this->get_image(), $points, count($points) / 2, $c);
        } else {
            imagepolygon($this->get_image(), $points, count($points) / 2, $c);
        }
    }

/**
     * Draws a circle at $x,$y with radius $r
     *
     * See {@link Style::munge_color()} for the format of the color array.
     * See {@link Cpdf::setLineStyle()} for a description of the $style
     * parameter (aka dash)
     *
     * @param float $x
     * @param float $y
     * @param float $r
     * @param array $color
     * @param float $width
     * @param array $style
     * @param bool $fill Fills the circle if true
     */
    public function circle($x, $y, $r, $color, $width = null, $style = null, $fill = false)
    {
        // Scale by the AA factor and DPI
        $x = $this->_upscale($x);
        $y = $this->_upscale($y);
        $r = $this->_upscale($r);

$c = $this->_allocate_color($color);

// Convert the style array if required
        if (is_array($style) && count($style) > 0 && !$fill) {
            $gd_style = array();

foreach ($style as $length) {
                for ($i = 0; $i < $length; $i++) {
                    $gd_style[] = $c;
                }
            }

if (!empty($gd_style)) {
                imagesetstyle($this->get_image(), $gd_style);
                $c = IMG_COLOR_STYLED;
            }
        }

imagesetthickness($this->get_image(), $width);

if ($fill) {
            imagefilledellipse($this->get_image(), $x, $y, $r, $r, $c);
        } else {
            imageellipse($this->get_image(), $x, $y, $r, $r, $c);
        }
    }

/**
     * Add an image to the pdf.
     * The image is placed at the specified x and y coordinates with the
     * given width and height.
     *
     * @param string $img_url the path to the image
     * @param float $x x position
     * @param float $y y position
     * @param int $w width (in pixels)
     * @param int $h height (in pixels)
     * @param string $resolution
     * @return void
     *
     * @throws \Exception
     * @internal param string $img_type the type (e.g. extension) of the image
     */
    public function image($img_url, $x, $y, $w, $h, $resolution = "normal")
    {
        $img_type = Cache::detect_type($img_url, $this->get_dompdf()->getHttpContext());

if (!$img_type) {
            return;
        }

$func_name = "imagecreatefrom$img_type";
        if (!function_exists($func_name)) {
            if (!method_exists("Dompdf\Helpers", $func_name)) {
                throw new \Exception("Function $func_name() not found.  Cannot convert $img_type image: $img_url.  Please install the image PHP extension.");
            }
            $func_name = "\\Dompdf\\Helpers::" . $func_name;
        }
        $src = @call_user_func($func_name, $img_url);

if (!$src) {
            return; // Probably should add to $_dompdf_errors or whatever here
        }

// Scale by the AA factor and DPI
        $x = $this->_upscale($x);
        $y = $this->_upscale($y);

$w = $this->_upscale($w);
        $h = $this->_upscale($h);

$img_w = imagesx($src);
        $img_h = imagesy($src);

imagecopyresampled($this->get_image(), $src, $x, $y, 0, 0, $w, $h, $img_w, $img_h);
    }

/**
     * Writes text at the specified x and y coordinates
     * See {@link Style::munge_color()} for the format of the color array.
     *
     * @param float $x
     * @param float $y
     * @param string $text the text to write
     * @param string $font the font file to use
     * @param float $size the font size, in points
     * @param array $color
     * @param float $word_spacing word spacing adjustment
     * @param float $char_spacing
     * @param float $angle Text angle
     *
     * @return void
     */
    public function text($x, $y, $text, $font, $size, $color = array(0, 0, 0), $word_spacing = 0.0, $char_spacing = 0.0, $angle = 0.0)
    {
        // Scale by the AA factor and DPI
        $x = $this->_upscale($x);
        $y = $this->_upscale($y);
        $size = $this->_upscale($size) * self::FONT_SCALE;

$h = $this->get_font_height_actual($font, $size);
        $c = $this->_allocate_color($color);

// imagettftext() converts numeric entities to their respective
        // character. Preserve any originally double encoded entities to be
        // represented as is.
        // eg: &amp;#160; will render &#160; rather than its character.
        $text = preg_replace('/&(#(?:x[a-fA-F0-9]+|[0-9]+);)/', '&#38;\1', $text);

$text = mb_encode_numericentity($text, array(0x0080, 0xff, 0, 0xff), 'UTF-8');

$font = $this->get_ttf_file($font);

// FIXME: word spacing
        imagettftext($this->get_image(), $size, $angle, $x, $y + $h, $c, $font, $text);
    }

public function javascript($code)
    {
        // Not implemented
    }

/**
     * Add a named destination (similar to <a name="foo">...</a> in html)
     *
     * @param string $anchorname The name of the named destination
     */
    public function add_named_dest($anchorname)
    {
        // Not implemented
    }

/**
     * Add a link to the pdf
     *
     * @param string $url The url to link to
     * @param float $x The x position of the link
     * @param float $y The y position of the link
     * @param float $width The width of the link
     * @param float $height The height of the link
     */
    public function add_link($url, $x, $y, $width, $height)
    {
        // Not implemented
    }

/**
     * Add meta information to the PDF
     *
     * @param string $label label of the value (Creator, Producer, etc.)
     * @param string $value the text to set
     */
    public function add_info($label, $value)
    {
        // N/A
    }

/**
     * @param string $view
     * @param array $options
     */
    public function set_default_view($view, $options = array())
    {
        // N/A
    }

/**
     * Calculates text size, in points
     *
     * @param string $text the text to be sized
     * @param string $font the desired font
     * @param float $size the desired font size
     * @param float $word_spacing word spacing, if any
     * @param float $char_spacing char spacing, if any
     *
     * @return float
     */
    public function get_text_width($text, $font, $size, $word_spacing = 0.0, $char_spacing = 0.0)
    {
        $font = $this->get_ttf_file($font);
        $size = $this->_upscale($size) * self::FONT_SCALE;

// imagettfbbox() converts numeric entities to their respective
        // character. Preserve any originally double encoded entities to be
        // represented as is.
        // eg: &amp;#160; will render &#160; rather than its character.
        $text = preg_replace('/&(#(?:x[a-fA-F0-9]+|[0-9]+);)/', '&#38;\1', $text);

$text = mb_encode_numericentity($text, array(0x0080, 0xffff, 0, 0xffff), 'UTF-8');

// FIXME: word spacing
        list($x1, , $x2) = imagettfbbox($size, 0, $font, $text);

// Add additional 1pt to prevent text overflow issues
        return $this->_downscale($x2 - $x1) + 1;
    }

/**
     * @param $font
     * @return string
     */
    public function get_ttf_file($font)
    {
        if ( stripos($font, ".ttf") === false ) {
            $font .= ".ttf";
        }

if (!file_exists($font)) {
            $font_metrics = $this->_dompdf->getFontMetrics();
            $font = $font_metrics->getFont($this->_dompdf->getOptions()->getDefaultFont()) . ".ttf";
            if (!file_exists($font)) {
                if (strpos($font, "mono")) {
                    $font = $font_metrics->getFont("DejaVu Mono") . ".ttf";
                } elseif (strpos($font, "sans") !== false) {
                    $font = $font_metrics->getFont("DejaVu Sans") . ".ttf";
                } elseif (strpos($font, "serif")) {
                    $font = $font_metrics->getFont("DejaVu Serif") . ".ttf";
                } else {
                    $font = $font_metrics->getFont("DejaVu Sans") . ".ttf";
                }
            }
        }

return $font;
    }

/**
     * Calculates font height, in points
     *
     * @param string $font
     * @param float $size
     * @return float
     */
    public function get_font_height($font, $size)
    {
        $size = $this->_upscale($size) * self::FONT_SCALE;

$height = $this->get_font_height_actual($font, $size);

return $this->_downscale($height);
    }

private function get_font_height_actual($font, $size)
    {
        $font = $this->get_ttf_file($font);
        $ratio = $this->_dompdf->getOptions()->getFontHeightRatio();

// FIXME: word spacing
        list(, $y2, , , , $y1) = imagettfbbox($size, 0, $font, "MXjpqytfhl"); // Test string with ascenders, descenders and caps
        return ($y2 - $y1) * $ratio;
    }

/**
     * @param string $font
     * @param float $size
     * @return float
     */
    public function get_font_baseline($font, $size)
    {
        $ratio = $this->_dompdf->getOptions()->getFontHeightRatio();
        return $this->get_font_height($font, $size) / $ratio;
    }

/**
     * Starts a new page
     *
     * Subsequent drawing operations will appear on the new page.
     */
    public function new_page()
    {
        $this->_page_number++;
        $this->_page_count++;

$this->_img = imagecreatetruecolor($this->_actual_width, $this->_actual_height);

$this->_bg_color = $this->_allocate_color($this->_bg_color_array);
        imagealphablending($this->_img, true);
        imagesavealpha($this->_img, true);
        imagefill($this->_img, 0, 0, $this->_bg_color);

$this->_imgs[] = $this->_img;
    }

public function open_object()
    {
        // N/A
    }

public function close_object()
    {
        // N/A
    }

public function add_object()
    {
        // N/A
    }

public function page_text()
    {
        // N/A
    }

public function page_line()
    {
        // N/A
    }

/**
     * Streams the image to the client.
     *
     * @param string $filename The filename to present to the client.
     * @param array $options Associative array: 'type' => jpeg|jpg|png; 'quality' => 0 - 100 (JPEG only);
     *     'page' => Number of the page to output (defaults to the first); 'Attachment': 1 or 0 (default 1).
     */
    public function stream($filename, $options = array())
    {
        if (headers_sent()) {
            die("Unable to stream image: headers already sent");
        }

if (!isset($options["type"])) $options["type"] = "png";
        if (!isset($options["Attachment"])) $options["Attachment"] = true;
        $type = strtolower($options["type"]);

switch ($type) {
            case "jpg":
            case "jpeg":
                $contentType = "image/jpeg";
                $extension = ".jpg";
                break;
            case "png":
            default:
                $contentType = "image/png";
                $extension = ".png";
                break;
        }

header("Cache-Control: private");
        header("Content-Type: $contentType");

$filename = str_replace(array("\n", "'"), "", basename($filename, ".$type")) . $extension;
        $attachment = $options["Attachment"] ? "attachment" : "inline";
        header(Helpers::buildContentDispositionHeader($attachment, $filename));

$this->_output($options);
        flush();
    }

/**
     * Returns the image as a string.
     *
     * @param array $options Associative array: 'type' => jpeg|jpg|png; 'quality' => 0 - 100 (JPEG only);
     *     'page' => Number of the page to output (defaults to the first).
     * @return string
     */
    public function output($options = array())
    {
        ob_start();

$this->_output($options);

return ob_get_clean();
    }

/**
     * Outputs the image stream directly.
     *
     * @param array $options Associative array: 'type' => jpeg|jpg|png; 'quality' => 0 - 100 (JPEG only);
     *     'page' => Number of the page to output (defaults to the first).
     */
    private function _output($options = array())
    {
        if (!isset($options["type"])) $options["type"] = "png";
        if (!isset($options["page"])) $options["page"] = 1;
        $type = strtolower($options["type"]);

if (isset($this->_imgs[$options["page"] - 1])) {
            $img = $this->_imgs[$options["page"] - 1];
        } else {
            $img = $this->_imgs[0];
        }

// Perform any antialiasing
        if ($this->_aa_factor != 1) {
            $dst_w = $this->_actual_width / $this->_aa_factor;
            $dst_h = $this->_actual_height / $this->_aa_factor;
            $dst = imagecreatetruecolor($dst_w, $dst_h);
            imagecopyresampled($dst, $img, 0, 0, 0, 0,
                $dst_w, $dst_h,
                $this->_actual_width, $this->_actual_height);
        } else {
            $dst = $img;
        }

switch ($type) {
            case "jpg":
            case "jpeg":
                if (!isset($options["quality"])) {
                    $options["quality"] = 75;
                }

imagejpeg($dst, null, $options["quality"]);
                break;
            case "png":
            default:
                imagepng($dst);
                break;
        }

if ($this->_aa_factor != 1) {
            imagedestroy($dst);
        }
    }
}

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