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<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black;mso-fareast-language:EN-US">Hello,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black;mso-fareast-language:EN-US">attached is a patch for cairo-win32-font.c, which fixed an issue with a problematic font on windows I had during printing
a pdf document on cairo (not using poppler).<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black;mso-fareast-language:EN-US">Problem:<o:p></o:p></span></b></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black;mso-fareast-language:EN-US">Cairo uses the winapi GetTextMetrics function, but didn’t check, if the function succeeded. See
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black;mso-fareast-language:EN-US"><a href="https://msdn.microsoft.com/de-de/library/windows/desktop/dd144941(v=vs.85).aspx">https://msdn.microsoft.com/de-de/library/windows/desktop/dd144941(v=vs.85).aspx</a></span><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana",sans-serif;mso-fareast-language:EN-US">
– it can fail.<span style="color:black"><o:p></o:p></span></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black;mso-fareast-language:EN-US">If the function fails, windows doesn’t fill the struct, which was given to GetTextMetrics and its values are kept uninitialized
– so cairo went depending on a random effect into different parts of code afterwards (symbol fonts / non symbol fonts) and didn’t make a clean error.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black;mso-fareast-language:EN-US">Because the font, which fails for GetTextMetrics function, is from a customer document and I don’t have the right to provide
the stuff to the outside, I cannot supply it to this list. But it is a reduced truetype font, which contains only a .notdef glyph and one additional glyph, which doesn’t have any contours, mapped to a space. <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black;mso-fareast-language:EN-US">Question:<o:p></o:p></span></b></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black;mso-fareast-language:EN-US">When Cairo fails internally for any reason it set sets an error code inside the context – and all content later, which i
want to output on this context isn’t processed anymore. In above case it works, that I ignore that error-setting and process the rest of the document.
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black;mso-fareast-language:EN-US">So how can I achieve, that when I left the erroneous state inside the context, that it works again? I miss something like
a cairo_reset_error function.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black">Best regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black">Patrick<o:p></o:p></span></p>
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