<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO - Mask problem in pdf" href="https://bugs.freedesktop.org/show_bug.cgi?id=63302#c17">Comment # 17</a> on <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO - Mask problem in pdf" href="https://bugs.freedesktop.org/show_bug.cgi?id=63302">bug 63302</a> from <a class="email" href="mailto:ajohnson@redneon.com" title="Adrian Johnson <ajohnson@redneon.com>"> Adrian Johnson</a> <pre>Created <a href="attachment.cgi?id=118974" name="attach_118974" title="test case fixed to turn off interpolation">attachment 118974</a> <a href="attachment.cgi?id=118974&action=edit" title="test case fixed to turn off interpolation">[details]</a> test case fixed to turn off interpolation The cairo pdf backend embeds images exactly as they are. There is no resampling done. The interpolation is being done by the pdf viewer. You can see the embedded images using pdfimages. Attached is an updated version of the test case that causes the interpolate flag in the embedded image to be set to false. The problem is pdf viewers may ignore this flag. This can be seen in evince where at higher zoom levels the image is not interpolated and the gray pixels disappear. At lower magnification evince will turn on interpolation to match Adobe Reader behavior. There really isn't anything that can be done in cairo. The cairo pdf backend is creating a pdf that reproduces the cairo drawing operations supplied to it. It is up to the viewer how it is rendered. Possible (untested) workarounds: - Use a higher resolution image - Ensure the color image is larger than the mask.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the QA Contact for the bug.</li> </ul> </body> </html>