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<?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 $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
}
/**
* Streams the image directly to the browser
*
* @param string $filename the name of the image file (ignored)
* @param array $options associative array, 'type' => jpeg|jpg|png, 'quality' => 0 - 100 (jpeg only)
*/
public function stream($filename, $options = null)
{
$img = $this->_imgs[0];
if (isset($options['page']) && isset($this->_imgs[$options['page'] - 1])) {
$img = $this->_imgs[$options['page'] - 1];
}
// 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 = $img;
}
if (!isset($options["type"]))
$options["type"] = "png";
$type = strtolower($options["type"]);
header("Cache-Control: private");
$filename = str_replace(array("\n", "'"), "", basename($filename, ".$type"));
switch ($type) {
case "jpg":
case "jpeg":
$filename .= ".jpg";
break;
case "png":
default:
$filename .= ".png";
break;
}
$attach = (isset($options["Attachment"]) && $options["Attachment"]) ? "attachment" : "inline";
// detect the character encoding of the incoming file
$encoding = mb_detect_encoding($filename);
$fallbackfilename = mb_convert_encoding($filename, "ISO-8859-1", $encoding);
$encodedfallbackfilename = rawurlencode($fallbackfilename);
$encodedfilename = rawurlencode($filename);
$contentDisposition = "Content-Disposition: $attachment; filename=\"" . $encodedfallbackfilename . "\"";
if ($encodedfallbackfilename !== $encodedfilename) {
$contentDisposition .= "; filename*=UTF-8''$encodedfilename";
}
header($contentDisposition);
switch ($type) {
case "jpg":
case "jpeg":
if (!isset($options["quality"]))
$options["quality"] = 75;
header("Content-type: image/jpeg");
imagejpeg($dst, '', $options["quality"]);
break;
case "png":
default:
header("Content-type: image/png");
imagepng($dst);
break;
}
if ($this->_aa_factor != 1)
imagedestroy($dst);
}
/**
* Returns the PNG as a string
*
* @param array $options associative array, 'type' => jpeg|jpg|png, 'quality' => 0 - 100 (jpeg only)
* @return string
*/
public function output($options = null)
{
$img = $this->_imgs[0];
if (isset($options['page']) && isset($this->_imgs[$options['page'] - 1])) {
$img = $this->_imgs[$options['page'] - 1];
}
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 = $img;
}
if (!isset($options["type"])) {
$options["type"] = "png";
}
$type = $options["type"];
ob_start();
switch ($type) {
case "jpg":
case "jpeg":
if (!isset($options["quality"])) {
$options["quality"] = 75;
}
imagejpeg($dst, '', $options["quality"]);
break;
case "png":
default:
imagepng($dst);
break;
}
$image = ob_get_clean();
if ($this->_aa_factor != 1) {
imagedestroy($dst);
}
return $image;
}
}
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