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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Hi,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Following additional details:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo2"><![if !supportLists]><span style="font-size:11.0pt;font-family:Symbol;color:#1F497D"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Hardware details: PXA270 (ARMV Architecture) with on-chip internal display controller, operating on 512 MHz processor speed, having 64 MB RAM, no FPU/GPU<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo2"><![if !supportLists]><span style="font-size:11.0pt;font-family:Symbol;color:#1F497D"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Linux kernel version: V2.6.35.9<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo2"><![if !supportLists]><span style="font-size:11.0pt;font-family:Symbol;color:#1F497D"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Stack is wxWidgets (V3.0.4) -> GTK+2 (V2.24.32) -> Pango (V1.3.0) -> Cairo (V1.14.12) -> XFbdev (X server)<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo2"><![if !supportLists]><span style="font-size:11.0pt;font-family:Symbol;color:#1F497D"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">For example, when calling wxMessgaeBox,<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:1.0in;text-indent:-.25in;mso-list:l0 level2 lfo2">
<![if !supportLists]><span style="font-size:11.0pt;font-family:"Courier New";color:#1F497D"><span style="mso-list:Ignore">o<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">First, background of message box is drawn<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:1.0in;text-indent:-.25in;mso-list:l0 level2 lfo2">
<![if !supportLists]><span style="font-size:11.0pt;font-family:"Courier New";color:#1F497D"><span style="mso-list:Ignore">o<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">After noticeable delay, the text and icon are drawn in the message box<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:1.0in;text-indent:-.25in;mso-list:l0 level2 lfo2">
<![if !supportLists]><span style="font-size:11.0pt;font-family:"Courier New";color:#1F497D"><span style="mso-list:Ignore">o<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">When click on "OK" button, message box disappears immediately<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:1.0in"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Best regards<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Sathya<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">Begin forwarded message:<o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><b>From:</b> Mike Gran <<a href="mailto:spk121@yahoo.com">spk121@yahoo.com</a>><br>
<b>Date:</b> 18 September 2018 at 18:39:22 IST<br>
<b>To:</b> <<a href="mailto:cairo@cairographics.org">cairo@cairographics.org</a>>, <<a href="mailto:Sathya.Narayana@mt.com">Sathya.Narayana@mt.com</a>><br>
<b>Subject:</b> <b>Re: [cairo] (no subject)</b><o:p></o:p></p>
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<p class="MsoNormal">We see the rendering of screens being very slow and we suspect it<o:p></o:p></p>
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<p class="MsoNormal">could be because of floating point operations. Since we do not have<o:p></o:p></p>
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<p class="MsoNormal">complex graphics, it is possible to switch off floating point operations<o:p></o:p></p>
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<p class="MsoNormal">or even switch off "double"? Also I am not sure if this is the reason<o:p></o:p></p>
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<p class="MsoNormal">for the poor rendering performance.<o:p></o:p></p>
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<p class="MsoNormal"><br>
I wonder if the problem actually might be the speed of writing to<br>
the framebuffer.<br>
<br>
I used to work on stuff like that, and I found that it was speedier to<br>
do all my drawing onto a cairo image surface instead of directly on the<br>
framebuffer. I would draw an entire frame on the image surface,<br>
and then paint the completed image onto the framebuffer surface.<br>
<br>
-Mike Gran<o:p></o:p></p>
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