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<?php
/**
* DOMPDF - PHP5 HTML to PDF renderer
*
* File: $RCSfile: abstract_renderer.cls.php,v $
* Created on: 2004-06-01
*
* 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: abstract_renderer.cls.php,v 1.6 2006/07/07 21:31:02 benjcarson Exp $ */
/**
* Base renderer class
*
* @access private
* @package dompdf
*/
abstract class Abstract_Renderer {
/**
* Rendering backend
*
* @var Canvas
*/
protected $_canvas;
/**
* Current dompdf instance
*
* @var DOMPDF
*/
protected $_dompdf;
/**
* Class constructor
*
* @param DOMPDF $dompdf The current dompdf instance
*/
function __construct(DOMPDF $dompdf) {
$this->_dompdf = $dompdf;
$this->_canvas = $dompdf->get_canvas();
}
/**
* Render a frame.
*
* Specialized in child classes
*
* @param Frame $frame The frame to render
*/
abstract function render(Frame $frame);
//........................................................................
/**
* Render a background image over a rectangular area
*
* @param string $img The background image to load
* @param float $x The left edge of the rectangular area
* @param float $y The top edge of the rectangular area
* @param float $width The width of the rectangular area
* @param float $height The height of the rectangular area
* @param Style $style The associated Style object
*/
protected function _background_image($url, $x, $y, $width, $height, $style) {
$sheet = $style->get_stylesheet();
// Skip degenerate cases
if ( $width == 0 || $height == 0 )
return;
list($img, $ext) = Image_Cache::resolve_url($url,
$sheet->get_protocol(),
$sheet->get_host(),
$sheet->get_base_path());
list($bg_x, $bg_y) = $style->background_position;
$repeat = $style->background_repeat;
if ( !is_percent($bg_x) )
$bg_x = $style->length_in_pt($bg_x);
if ( !is_percent($bg_y) )
$bg_y = $style->length_in_pt($bg_y);
$repeat = $style->background_repeat;
$position = $style->background_position;
$bg_color = $style->background_color;
// Bail if the image is no good
if ( $img == DOMPDF_LIB_DIR . "/res/broken_image.png" )
return;
$ext = strtolower($ext);
list($img_w, $img_h) = getimagesize($img);
$bg_width = round($width * DOMPDF_DPI / 72);
$bg_height = round($height * DOMPDF_DPI / 72);
// Create a new image to fit over the background rectangle
$bg = imagecreatetruecolor($bg_width, $bg_height);
if ( $bg_color == "transparent" )
$bg_color = array(1,1,1);
list($r,$g,$b) = $bg_color;
$r *= 255; $g *= 255; $b *= 255;
// Clip values
$r = $r > 255 ? 255 : $r;
$g = $g > 255 ? 255 : $g;
$b = $b > 255 ? 255 : $b;
$r = $r < 0 ? 0 : $r;
$g = $g < 0 ? 0 : $g;
$b = $b < 0 ? 0 : $b;
$clear = imagecolorallocate($bg,round($r),round($g),round($b));
imagecolortransparent($bg, $clear);
imagefill($bg,1,1,$clear);
switch ($ext) {
case "png":
$src = imagecreatefrompng($img);
break;
case "jpg":
case "jpeg":
$src = imagecreatefromjpeg($img);
break;
case "gif":
$src = imagecreatefromgif($img);
break;
default:
return; // Unsupported image type
}
if ( is_percent($bg_x) ) {
// The point $bg_x % from the left edge of the image is placed
// $bg_x % from the left edge of the background rectangle
$p = ((float)$bg_x)/100.0;
$x1 = $p * $img_w;
$x2 = $p * $bg_width;
$bg_x = $x2 - $x1;
}
if ( is_percent($bg_y) ) {
// The point $bg_y % from the left edge of the image is placed
// $bg_y % from the left edge of the background rectangle
$p = ((float)$bg_y)/100.0;
$y1 = $p * $img_h;
$y2 = $p * $bg_height;
$bg_y = $y2 - $y1;
}
// Copy regions from the source image to the background
if ( $repeat == "no-repeat" ||
($repeat == "repeat-x" && $img_w >= $bg_width) ||
($repeat == "repeat-y" && $img_h >= $bg_height) ||
($repeat == "repeat" && $img_w >= $bg_width && $img_h >= $bg_height) ) {
// Simply place the image on the background
$src_x = 0;
$src_y = 0;
$dst_x = $bg_x;
$dst_y = $bg_y;
if ( $bg_x < 0 ) {
$dst_x = 0;
$src_x = -$bg_x;
}
if ( $bg_y < 0 ) {
$dst_y = 0;
$src_y = -$bg_y;
}
$bg_x = round($bg_x * DOMPDF_DPI / 72);
$bg_y = round($bg_y * DOMPDF_DPI / 72);
imagecopy($bg, $src, $dst_x, $dst_y, $src_x, $src_y, $img_w, $img_h);
} else if ( $repeat == "repeat-x" ) {
$src_x = 0;
$src_y = 0;
$dst_y = $bg_y;
if ( $bg_y < 0 ) {
$dst_y = 0;
$src_y = -$bg_y;
}
if ( $bg_x < 0 )
$start_x = $bg_x;
else
$start_x = $bg_x % $img_w - $img_w;
for ( $bg_x = $start_x; $bg_x < $bg_width; $bg_x += $img_w ) {
if ( $bg_x < 0 ) {
$dst_x = 0;
$src_x = -$bg_x;
$w = $img_w + $bg_x;
} else {
$dst_x = $bg_x;
$src_x = 0;
$w = $img_w;
}
imagecopy($bg, $src, $dst_x, $dst_y, $src_x, $src_y, $w, $img_h);
}
} else if ( $repeat == "repeat-y" ) {
$src_x = 0;
$src_y = 0;
$dst_x = $bg_x;
if ( $bg_x < 0 ) {
$dst_x = 0;
$src_x = -$bg_x;
}
if ( $bg_y < 0 )
$start_y = $bg_y;
else
$start_y = $bg_y % $img_h - $img_h;
for ( $bg_y = $start_y; $bg_y < $bg_height; $bg_y += $img_h ) {
if ( $bg_y < 0 ) {
$dst_y = 0;
$src_y = -$bg_y;
$h = $img_h + $bg_y;
} else {
$dst_y = $bg_y;
$src_y = 0;
$h = $img_h;
}
imagecopy($bg, $src, $dst_x, $dst_y, $src_x, $src_y, $img_w, $h);
}
} else {
if ( $bg_x < 0 )
$start_x = $bg_x;
else
$start_x = $bg_x % $img_w - $img_w;
if ( $bg_y < 0 )
$start_y = $bg_y;
else
$start_y = $bg_y % $img_h - $img_h;
for ( $bg_y = $start_y; $bg_y < $bg_height; $bg_y += $img_h ) {
for ( $bg_x = $start_x; $bg_x < $bg_width; $bg_x += $img_w ) {
if ( $bg_x < 0 ) {
$dst_x = 0;
$src_x = -$bg_x;
$w = $img_w + $bg_x;
} else {
$dst_x = $bg_x;
$src_x = 0;
$w = $img_w;
}
if ( $bg_y < 0 ) {
$dst_y = 0;
$src_y = -$bg_y;
$h = $img_h + $bg_y;
} else {
$dst_y = $bg_y;
$src_y = 0;
$h = $img_h;
}
imagecopy($bg, $src, $dst_x, $dst_y, $src_x, $src_y, $w, $h);
}
}
}
$tmp_file = tempnam(DOMPDF_TEMP_DIR, "dompdf_img_");
imagepng($bg, $tmp_file);
$this->_canvas->image($tmp_file, "png", $x, $y, $width, $height);
unlink($tmp_file);
}
protected function _border_none($x, $y, $length, $color, $widths, $side, $corner_style = "bevel") {
return;
}
// Border rendering functions
protected function _border_dotted($x, $y, $length, $color, $widths, $side, $corner_style = "bevel") {
list($top, $right, $bottom, $left) = $widths;
if ( $$side < 2 )
$dash = array($$side, 2);
else
$dash = array($$side);
switch ($side) {
case "top":
$delta = $top / 2;
case "bottom":
$delta = isset($delta) ? $delta : -$bottom / 2;
$this->_canvas->line($x, $y + $delta, $x + $length, $y + $delta, $color, $$side, $dash);
break;
case "left":
$delta = $left / 2;
case "right":
$delta = isset($delta) ? $delta : - $right / 2;
$this->_canvas->line($x + $delta, $y, $x + $delta, $y + $length, $color, $$side, $dash);
break;
default:
return;
}
}
protected function _border_dashed($x, $y, $length, $color, $widths, $side, $corner_style = "bevel") {
list($top, $right, $bottom, $left) = $widths;
switch ($side) {
case "top":
$delta = $top / 2;
case "bottom":
$delta = isset($delta) ? $delta : -$bottom / 2;
$this->_canvas->line($x, $y + $delta, $x + $length, $y + $delta, $color, $$side, array(3 * $$side));
break;
case "left":
$delta = $left / 2;
case "right":
$delta = isset($delta) ? $delta : - $right / 2;
$this->_canvas->line($x + $delta, $y, $x + $delta, $y + $length, $color, $$side, array(3 * $$side));
break;
default:
return;
}
}
protected function _border_solid($x, $y, $length, $color, $widths, $side, $corner_style = "bevel") {
list($top, $right, $bottom, $left) = $widths;
// All this polygon business is for beveled corners...
switch ($side) {
case "top":
if ( $corner_style == "bevel" ) {
$points = array($x, $y,
$x + $length, $y,
$x + $length - $right, $y + $top,
$x + $left, $y + $top);
$this->_canvas->polygon($points, $color, null, null, true);
} else
$this->_canvas->filled_rectangle($x, $y, $length, $top, $color);
break;
case "bottom":
if ( $corner_style == "bevel" ) {
$points = array($x, $y,
$x + $length, $y,
$x + $length - $right, $y - $bottom,
$x + $left, $y - $bottom);
$this->_canvas->polygon($points, $color, null, null, true);
} else
$this->_canvas->filled_rectangle($x, $y - $bottom, $length, $bottom, $color);
break;
case "left":
if ( $corner_style == "bevel" ) {
$points = array($x, $y,
$x, $y + $length,
$x + $left, $y + $length - $bottom,
$x + $left, $y + $top);
$this->_canvas->polygon($points, $color, null, null, true);
} else
$this->_canvas->filled_rectangle($x, $y, $left, $length, $color);
break;
case "right":
if ( $corner_style == "bevel" ) {
$points = array($x, $y,
$x, $y + $length,
$x - $right, $y + $length - $bottom,
$x - $right, $y + $top);
$this->_canvas->polygon($points, $color, null, null, true);
} else
$this->_canvas->filled_rectangle($x - $right, $y, $right, $length, $color);
break;
default:
return;
}
}
protected function _border_double($x, $y, $length, $color, $widths, $side, $corner_style = "bevel") {
list($top, $right, $bottom, $left) = $widths;
$line_width = $$side / 4;
// We draw the outermost edge first. Points are ordered: outer left,
// outer right, inner right, inner left, or outer top, outer bottom,
// inner bottom, inner top.
switch ($side) {
case "top":
if ( $corner_style == "bevel" ) {
$left_line_width = $left / 4;
$right_line_width = $right / 4;
$points = array($x, $y,
$x + $length, $y,
$x + $length - $right_line_width, $y + $line_width,
$x + $left_line_width, $y + $line_width,);
$this->_canvas->polygon($points, $color, null, null, true);
$points = array($x + $left - $left_line_width, $y + $top - $line_width,
$x + $length - $right + $right_line_width, $y + $top - $line_width,
$x + $length - $right, $y + $top,
$x + $left, $y + $top);
$this->_canvas->polygon($points, $color, null, null, true);
} else {
$this->_canvas->filled_rectangle($x, $y, $length, $line_width, $color);
$this->_canvas->filled_rectangle($x, $y + $top - $line_width, $length, $line_width, $color);
}
break;
case "bottom":
if ( $corner_style == "bevel" ) {
$left_line_width = $left / 4;
$right_line_width = $right / 4;
$points = array($x, $y,
$x + $length, $y,
$x + $length - $right_line_width, $y - $line_width,
$x + $left_line_width, $y - $line_width);
$this->_canvas->polygon($points, $color, null, null, true);
$points = array($x + $left - $left_line_width, $y - $bottom + $line_width,
$x + $length - $right + $right_line_width, $y - $bottom + $line_width,
$x + $length - $right, $y - $bottom,
$x + $left, $y - $bottom);
$this->_canvas->polygon($points, $color, null, null, true);
} else {
$this->_canvas->filled_rectangle($x, $y - $line_width, $length, $line_width, $color);
$this->_canvas->filled_rectangle($x, $y - $bottom, $length, $line_width, $color);
}
break;
case "left":
if ( $corner_style == "bevel" ) {
$top_line_width = $top / 4;
$bottom_line_width = $bottom / 4;
$points = array($x, $y,
$x, $y + $length,
$x + $line_width, $y + $length - $bottom_line_width,
$x + $line_width, $y + $top_line_width);
$this->_canvas->polygon($points, $color, null, null, true);
$points = array($x + $left - $line_width, $y + $top - $top_line_width,
$x + $left - $line_width, $y + $length - $bottom + $bottom_line_width,
$x + $left, $y + $length - $bottom,
$x + $left, $y + $top);
$this->_canvas->polygon($points, $color, null, null, true);
} else {
$this->_canvas->filled_rectangle($x, $y, $line_width, $length, $color);
$this->_canvas->filled_rectangle($x + $left - $line_width, $y, $line_width, $length, $color);
}
break;
case "right":
if ( $corner_style == "bevel" ) {
$top_line_width = $top / 4;
$bottom_line_width = $bottom / 4;
$points = array($x, $y,
$x, $y + $length,
$x - $line_width, $y + $length - $bottom_line_width,
$x - $line_width, $y + $top_line_width);
$this->_canvas->polygon($points, $color, null, null, true);
$points = array($x - $right + $line_width, $y + $top - $top_line_width,
$x - $right + $line_width, $y + $length - $bottom + $bottom_line_width,
$x - $right, $y + $length - $bottom,
$x - $right, $y + $top);
$this->_canvas->polygon($points, $color, null, null, true);
} else {
$this->_canvas->filled_rectangle($x - $line_width, $y, $line_width, $length, $color);
$this->_canvas->filled_rectangle($x - $right, $y, $line_width, $length, $color);
}
break;
default:
return;
}
}
protected function _border_groove($x, $y, $length, $color, $widths, $side, $corner_style = "bevel") {
list($top, $right, $bottom, $left) = $widths;
$half_widths = array($top / 2, $right / 2, $bottom / 2, $left / 2);
$this->_border_inset($x, $y, $length, $color, $half_widths, $side);
switch ($side) {
case "top":
$x += $left / 2;
$y += $top / 2;
$length -= $left / 2 + $right / 2;
break;
case "bottom":
$x += $left / 2;
$y -= $bottom / 2;
$length -= $left / 2 + $right / 2;
break;
case "left":
$x += $left / 2;
$y += $top / 2;
$length -= $top / 2 + $bottom / 2;
break;
case "right":
$x -= $right / 2;
$y += $top / 2;
$length -= $top / 2 + $bottom / 2;
break;
default:
return;
}
$this->_border_outset($x, $y, $length, $color, $half_widths, $side);
}
protected function _border_ridge($x, $y, $length, $color, $widths, $side, $corner_style = "bevel") {
list($top, $right, $bottom, $left) = $widths;
$half_widths = array($top / 2, $right / 2, $bottom / 2, $left / 2);
$this->_border_outset($x, $y, $length, $color, $half_widths, $side);
switch ($side) {
case "top":
$x += $left / 2;
$y += $top / 2;
$length -= $left / 2 + $right / 2;
break;
case "bottom":
$x += $left / 2;
$y -= $bottom / 2;
$length -= $left / 2 + $right / 2;
break;
case "left":
$x += $left / 2;
$y += $top / 2;
$length -= $top / 2 + $bottom / 2;
break;
case "right":
$x -= $right / 2;
$y += $top / 2;
$length -= $top / 2 + $bottom / 2;
break;
default:
return;
}
$this->_border_inset($x, $y, $length, $color, $half_widths, $side);
}
protected function _tint($c) {
if ( !is_numeric($c) )
return $c;
return min(1, $c + 0.66);
}
protected function _shade($c) {
if ( !is_numeric($c) )
return $c;
return max(0, $c - 0.66);
}
protected function _border_inset($x, $y, $length, $color, $widths, $side, $corner_style = "bevel") {
list($top, $right, $bottom, $left) = $widths;
switch ($side) {
case "top":
case "left":
$shade = array_map(array($this, "_shade"), $color);
$this->_border_solid($x, $y, $length, $shade, $widths, $side);
break;
case "bottom":
case "right":
$tint = array_map(array($this, "_tint"), $color);
$this->_border_solid($x, $y, $length, $tint, $widths, $side);
break;
default:
return;
}
}
protected function _border_outset($x, $y, $length, $color, $widths, $side, $corner_style = "bevel") {
list($top, $right, $bottom, $left) = $widths;
switch ($side) {
case "top":
case "left":
$tint = array_map(array($this, "_tint"), $color);
$this->_border_solid($x, $y, $length, $tint, $widths, $side);
break;
case "bottom":
case "right":
$shade = array_map(array($this, "_shade"), $color);
$this->_border_solid($x, $y, $length, $shade, $widths, $side);
break;
default:
return;
}
}
//........................................................................
}
?>
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