We are trying to convert SVG (width 737, height 521) to PDF format A4. The problem is that the quality of the created images is really bad.
Here is what we do
SVG (with image URLs removed):
<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="737" height="521">
<g class="background">
<title>Background</title>
<image x="0" y="0" width="737" height="521" id="svg_1" xlink:href="http://static.inkive.com/assets/img/backgrounds/default.svg"/>
</g><g class="main">
<title>Main</title>
<image id="svg_2" clip-path="url(#clip_svg_2)" class="layoutBox" height="146" width="195" y="185" x="112" xlink:href="https://fbcdn-sphotos-c-a.akamaihd.net/hphotos-ak-ash3/t1/1779720_10153782785350029_1577015767_n.jpg">112 185 195 146</image>
<image id="svg_3" clip-path="url(#clip_svg_3)" class="layoutBox" height="146" width="195" y="342" x="112" xlink:href="https://scontent-b.xx.fbcdn.net/hphotos-frc3/t1/1526323_10153667389170029_829908430_n.jpg">112 342 195 146</image>
<image id="svg_4" clip-path="url(#clip_svg_4)" class="layoutBox" height="146" width="195" y="28" x="112" xlink:href="https://scontent-b.xx.fbcdn.net/hphotos-prn1/t1/1522194_10153655638625029_2110669828_n.jpg">112 28 195 146</image>
<image id="svg_5" clip-path="url(#clip_svg_5)" class="layoutBox" height="222" width="296" y="28" x="323" xlink:href="https://scontent-a.xx.fbcdn.net/hphotos-prn2/t1/1157459_10153637913840029_1004079041_n.jpg">323 28 296 222</image>
<image id="svg_6" clip-path="url(#clip_svg_6)" class="layoutBox" height="222" width="296" y="266" x="323" xlink:href="https://scontent-a.xx.fbcdn.net/hphotos-frc3/t1/996689_10153637905215029_532085859_n.jpg">323 266 296 222</image>
</g>
</svg>
We upload images and create SVGs with local links, as converting SVGs to PDF with imagemagick errors fails with remote URLs. Here svg with local links -
<?xml version="1.0"?>
<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="737" height="521">
<g class="background">
<title>Background</title>
<image x="0" y="0" width="737" height="521" id="svg_1" xlink:href="file:///tmp/119810194_default.svg"/>
</g><g class="main">
<title>Main</title>
<image id="svg_2" clip-path="url(#clip_svg_2)" class="layoutBox" height="146" width="195" y="185" x="112" xlink:href="file:///tmp/119810194_1779720_10153782785350029_1577015767_n.jpg">112 185 195 146</image>
<image id="svg_3" clip-path="url(#clip_svg_3)" class="layoutBox" height="146" width="195" y="342" x="112" xlink:href="file:///tmp/119810194_1526323_10153667389170029_829908430_n.jpg">112 342 195 146</image>
<image id="svg_4" clip-path="url(#clip_svg_4)" class="layoutBox" height="146" width="195" y="28" x="112" xlink:href="file:///tmp/119810194_1522194_10153655638625029_2110669828_n.jpg">112 28 195 146</image>
<image id="svg_5" clip-path="url(#clip_svg_5)" class="layoutBox" height="222" width="296" y="28" x="323" xlink:href="file:///tmp/119810194_1157459_10153637913840029_1004079041_n.jpg">323 28 296 222</image>
<image id="svg_6" clip-path="url(#clip_svg_6)" class="layoutBox" height="222" width="296" y="266" x="323" xlink:href="file:///tmp/119810194_996689_10153637905215029_532085859_n.jpg">323 266 296 222</image>
</g>
</svg>
We save this SVG to a file and execute the following command:
convert -density 600 /var/www/development/assets/img/uploads/119810194_1.svg -resize 3508x2480 /var/www/development/assets/img/uploads/119810194_1.pdf
Output
As you can see, the image quality in the output PDF file is very poor.
Can anyone help me with this? What needs to be done to create 72 DPI and 300 DPI PDF with the best images?
We also tried this with PHP, with setResolution (300, 300), but the result was the same.