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<?php
/**
* DOMPDF - PHP5 HTML to PDF renderer
*
* File: $RCSfile: gd_adapter.cls.php,v $
* Created on: 2004-06-06
*
* Copyright (c) 2004 - Benj Carson <benjcarson@digitaljunkies.ca>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library in the file LICENSE.LGPL; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
* 02111-1307 USA
*
* Alternatively, you may distribute this software under the terms of the
* PHP License, version 3.0 or later. A copy of this license should have
* been distributed with this file in the file LICENSE.PHP . If this is not
* the case, you can obtain a copy at http://www.php.net/license/3_0.txt.
*
* The latest version of DOMPDF might be available at:
* http://www.digitaljunkies.ca/dompdf
*
* @link http://www.digitaljunkies.ca/dompdf
* @copyright 2004 Benj Carson
* @author Benj Carson <benjcarson@digitaljunkies.ca>
* @package dompdf
* @version 0.5.1
*/
/* $Id */
/**
* 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_Adapter implements Canvas {
/**
* Resoure handle for the image
*
* @var resource
*/
private $_img;
/**
* Image width in pixels
*
* @var int
*/
private $_width;
/**
* Image height in pixels
*
* @var int
*/
private $_height;
/**
* Image antialias factor
*
* @var float
*/
private $_aa_factor;
/**
* Allocated colors
*
* @var array
*/
private $_colors;
/**
* Background color
*
* @var int
*/
private $_bg_color;
/**
* 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 float $aa_factor Anti-aliasing factor, 1 for no AA
* @param array $bg_color Image background color: array(r,g,b,a), 0 <= r,g,b,a <= 1
*/
function __construct($size, $orientation = "portrait", $aa_factor = 1, $bg_color = array(1,1,1,0) ) {
if ( !is_array($size) ) {
if ( isset(CPDF_Adapter::$PAPER_SIZES[ strtolower($size)]) )
$size = CPDF_Adapter::$PAPER_SIZES[$size];
else
$size = CPDF_Adapter::$PAPER_SIZES["letter"];
}
if ( strtolower($orientation) == "landscape" ) {
list($size[2],$size[3]) = array($size[3],$size[2]);
}
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];
$this->_img = imagecreatetruecolor($this->_width, $this->_height);
if ( is_null($bg_color) || !is_array($bg_color) ) {
// Pure white bg
$bg_color = array(1,1,1,0);
}
$this->_bg_color = $this->_allocate_color($bg_color);
imagealphablending($this->_img, false);
imagesavealpha($this->_img, true);
imagefill($this->_img, 0, 0, $this->_bg_color);
}
/**
* Return the GF image resource
*
* @return resource
*/
function get_image() { return $this->_img; }
/**
* Return the image's width in pixels
*
* @return float
*/
function get_width() { return $this->_width / $this->_aa_factor; }
/**
* Return the image's height in pixels
*
* @return float
*/
function get_height() { return $this->_height / $this->_aa_factor; }
/**
* Returns the current page number
*
* @return int
*/
function get_page_number() {
// FIXME
}
/**
* Returns the total number of pages
*
* @return int
*/
function get_page_count() {
// FIXME
}
/**
* Sets the total number of pages
*
* @param int $count
*/
function set_page_count($count) {
// 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) {
// Full opacity if no alpha set
if ( !isset($color[3]) )
$color[3] = 0;
list($r,$g,$b,$a) = $color;
$r *= 255;
$g *= 255;
$b *= 255;
$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->_img, $r, $g, $b, $a);
else
$this->_colors[$key] = imagecolorallocate($this->_img, $r, $g, $b);
return $this->_colors[$key];
}
/**
* 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 $style
*/
function line($x1, $y1, $x2, $y2, $color, $width, $style = null) {
// Scale by the AA factor
$x1 *= $this->_aa_factor;
$y1 *= $this->_aa_factor;
$x2 *= $this->_aa_factor;
$y2 *= $this->_aa_factor;
$width *= $this->_aa_factor;
$c = $this->_allocate_color($color);
// Convert the style array if required
if ( !is_null($style) ) {
$gd_style = array();
if ( count($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;
}
$i++;
}
}
imagesetstyle($this->_img, $gd_style);
$c = IMG_COLOR_STYLED;
}
imagesetthickness($this->_img, $width);
imageline($this->_img, $x1, $y1, $x2, $y2, $c);
}
/**
* 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 $style
*/
function rectangle($x1, $y1, $w, $h, $color, $width, $style = null) {
// Scale by the AA factor
$x1 *= $this->_aa_factor;
$y1 *= $this->_aa_factor;
$w *= $this->_aa_factor;
$h *= $this->_aa_factor;
$c = $this->_allocate_color($color);
// Convert the style array if required
if ( !is_null($style) ) {
$gd_style = array();
foreach ($style as $length) {
for ($i = 0; $i < $length; $i++) {
$gd_style[] = $c;
}
}
imagesetstyle($this->_img, $gd_style);
$c = IMG_COLOR_STYLED;
}
imagesetthickness($this->_img, $width);
imagerectangle($this->_img, $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 $color
*/
function filled_rectangle($x1, $y1, $w, $h, $color) {
// Scale by the AA factor
$x1 *= $this->_aa_factor;
$y1 *= $this->_aa_factor;
$w *= $this->_aa_factor;
$h *= $this->_aa_factor;
$c = $this->_allocate_color($color);
imagefilledrectangle($this->_img, $x1, $y1, $x1 + $w, $y1 + $h, $c);
}
/**
* 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 $fill Fills the polygon if true
*/
function polygon($points, $color, $width = null, $style = null, $fill = false) {
// Scale each point by the AA factor
foreach (array_keys($points) as $i)
$points[$i] *= $this->_aa_factor;
$c = $this->_allocate_color($color);
// Convert the style array if required
if ( !is_null($style) && !$fill ) {
$gd_style = array();
foreach ($style as $length) {
for ($i = 0; $i < $length; $i++) {
$gd_style[] = $c;
}
}
imagesetstyle($this->_img, $gd_style);
$c = IMG_COLOR_STYLED;
}
imagesetthickness($this->_img, $width);
if ( $fill )
imagefilledpolygon($this->_img, $points, count($points) / 2, $c);
else
imagepolygon($this->_img, $points, count($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 $fill Fills the circle if true
*/
function circle($x, $y, $r, $color, $width = null, $style = null, $fill = false) {
// Scale by the AA factor
$x *= $this->_aa_factor;
$y *= $this->_aa_factor;
$r *= $this->_aa_factor;
$c = $this->_allocate_color($color);
// Convert the style array if required
if ( !is_null($style) && !$fill ) {
$gd_style = array();
foreach ($style as $length) {
for ($i = 0; $i < $length; $i++) {
$gd_style[] = $c;
}
}
imagesetstyle($this->_img, $gd_style);
$c = IMG_COLOR_STYLED;
}
imagesetthickness($this->_img, $width);
if ( $fill )
imagefilledellipse($this->_img, $x, $y, $r, $r, $c);
else
imageellipse($this->_img, $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 string $img_type the type (e.g. extension) of the image
* @param float $x x position
* @param float $y y position
* @param int $w width (in pixels)
* @param int $h height (in pixels)
*/
function image($img_url, $img_type, $x, $y, $w, $h) {
switch ($img_type) {
case "png":
$src = @imagecreatefrompng($img_url);
break;
case "gif":
$src = @imagecreatefromgif($img_url);
break;
case "jpg":
case "jpeg":
$src = @imagecreatefromjpeg($img_url);
break;
default:
break;
}
if ( !$src )
return; // Probably should add to $_dompdf_errors or whatever here
// Scale by the AA factor
$x *= $this->_aa_factor;
$y *= $this->_aa_factor;
$w *= $this->_aa_factor;
$h *= $this->_aa_factor;
$img_w = imagesx($src);
$img_h = imagesy($src);
imagecopyresampled($this->_img, $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 $adjust word spacing adjustment
*/
function text($x, $y, $text, $font, $size, $color = array(0,0,0), $adjust = 0) {
// Scale by the AA factor
$x *= $this->_aa_factor;
$y *= $this->_aa_factor;
$size *= $this->_aa_factor;
$h = $this->get_font_height($font, $size);
$c = $this->_allocate_color($color);
if ( strpos($font, '.ttf') === false )
$font .= ".ttf";
// FIXME: word spacing
imagettftext($this->_img, $size, 0, $x, $y + $h, $c, $font, $text);
}
/**
* Add a named destination (similar to <a name="foo">...</a> in html)
*
* @param string $anchorname The name of the named destination
*/
function add_named_dest($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 $height The height of the link
*/
function add_link($url, $x, $y, $width, $height) {
// Not implemented
}
/**
* 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 $spacing word spacing, if any
* @return float
*/
function get_text_width($text, $font, $size, $spacing = 0) {
if ( strpos($font, '.ttf') === false )
$font .= ".ttf";
// FIXME: word spacing
list($x1,,$x2) = imagettfbbox($size, 0, $font, $text);
return $x2 - $x1;
}
/**
* Calculates font height, in points
*
* @param string $font
* @param float $size
* @return float
*/
function get_font_height($font, $size) {
if ( strpos($font, '.ttf') === false )
$font .= ".ttf";
// FIXME: word spacing
list(,$y2,,,,$y1) = imagettfbbox($size, 0, $font, "MXjpqytfhl"); // Test string with ascenders, descenders and caps
return $y2 - $y1;
}
/**
* Starts a new page
*
* Subsequent drawing operations will appear on the new page.
*/
function new_page() {
// FIXME
}
/**
* Streams the image directly to the browser
*
* @param string $filename the name of the image file (ignored)
* @param array $options associative array, 'type' => jpeg|jpg|png, 'quality' => 0 - 100 (jpeg only)
*/
function stream($filename, $options = null) {
// Perform any antialiasing
if ( $this->_aa_factor != 1 ) {
$dst_w = $this->_width / $this->_aa_factor;
$dst_h = $this->_height / $this->_aa_factor;
$dst = imagecreatetruecolor($dst_w, $dst_h);
imagecopyresampled($dst, $this->_img, 0, 0, 0, 0,
$dst_w, $dst_h,
$this->_width, $this->_height);
} else {
$dst = $this->_img;
}
if ( !isset($options["type"]) )
$options["type"] = "png";
$type = strtolower($options["type"]);
header("Cache-Control: private");
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 $options associative array, 'type' => jpeg|jpg|png, 'quality' => 0 - 100 (jpeg only)
* @return string
*/
function output($options = null) {
if ( $this->_aa_factor != 1 ) {
$dst_w = $this->_width / $this->_aa_factor;
$dst_h = $this->_height / $this->_aa_factor;
$dst = imagecreatetruecolor($dst_w, $dst_h);
imagecopyresampled($dst, $this->_img, 0, 0, 0, 0,
$dst_w, $dst_h,
$this->_width, $this->_height);
} else {
$dst = $this->_img;
}
if ( !isset($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_contents();
ob_end_clean();
if ( $this->_aa_factor != 1 )
imagedestroy($dst);
return $image;
}
}
?>
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