<?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\Renderer;

use Dompdf\Frame;
use Dompdf\Image\Cache;

/**
 * Image renderer
 *
 * @access  private
 * @package dompdf
 */
class Image extends Block
{

    function render(Frame $frame)
    {
        // Render background & borders
        $style = $frame->get_style();
        $cb = $frame->get_containing_block();
        list($x, $y, $w, $h) = $frame->get_border_box();

        $this->_set_opacity($frame->get_opacity($style->opacity));

        list($tl, $tr, $br, $bl) = $style->get_computed_border_radius($w, $h);

        $has_border_radius = $tl + $tr + $br + $bl > 0;

        if ($has_border_radius) {
            $this->_canvas->clipping_roundrectangle($x, $y, $w, $h, $tl, $tr, $br, $bl);
        }

        if (($bg = $style->background_color) !== "transparent") {
            $this->_canvas->filled_rectangle($x, $y, $w, $h, $bg);
        }

        if (($url = $style->background_image) && $url !== "none") {
            $this->_background_image($url, $x, $y, $w, $h, $style);
        }

        if ($has_border_radius) {
            $this->_canvas->clipping_end();
        }

        $this->_render_border($frame);
        $this->_render_outline($frame);

        list($x, $y) = $frame->get_padding_box();

        $x += $style->length_in_pt($style->padding_left, $cb["w"]);
        $y += $style->length_in_pt($style->padding_top, $cb["h"]);

        $w = $style->length_in_pt($style->width, $cb["w"]);
        $h = $style->length_in_pt($style->height, $cb["h"]);

        if ($has_border_radius) {
            list($wt, $wr, $wb, $wl) = array(
                $style->border_top_width,
                $style->border_right_width,
                $style->border_bottom_width,
                $style->border_left_width,
            );

            // we have to get the "inner" radius
            if ($tl > 0) {
                $tl -= ($wt + $wl) / 2;
            }
            if ($tr > 0) {
                $tr -= ($wt + $wr) / 2;
            }
            if ($br > 0) {
                $br -= ($wb + $wr) / 2;
            }
            if ($bl > 0) {
                $bl -= ($wb + $wl) / 2;
            }

            $this->_canvas->clipping_roundrectangle($x, $y, $w, $h, $tl, $tr, $br, $bl);
        }

        $src = $frame->get_image_url();
        $alt = null;

        if (Cache::is_broken($src) &&
            $alt = $frame->get_node()->getAttribute("alt")
        ) {
            $font = $style->font_family;
            $size = $style->font_size;
            $spacing = $style->word_spacing;
            $this->_canvas->text($x, $y, $alt,
                $font, $size,
                $style->color, $spacing);
        } else {
            $this->_canvas->image($src, $x, $y, $w, $h, $style->image_resolution);
        }

        if ($has_border_radius) {
            $this->_canvas->clipping_end();
        }

        if ($msg = $frame->get_image_msg()) {
            $parts = preg_split("/\s*\n\s*/", $msg);
            $height = 10;
            $_y = $alt ? $y + $h - count($parts) * $height : $y;

            foreach ($parts as $i => $_part) {
                $this->_canvas->text($x, $_y + $i * $height, $_part, "times", $height * 0.8, array(0.5, 0.5, 0.5));
            }
        }

        if ($this->_dompdf->get_option("debugLayout") && $this->_dompdf->get_option("debugLayoutBlocks")) {
            $this->_debug_layout($frame->get_border_box(), "blue");
            if ($this->_dompdf->get_option("debugLayoutPaddingBox")) {
                $this->_debug_layout($frame->get_padding_box(), "blue", array(0.5, 0.5));
            }
        }
    }
}