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<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;color:#1F497D">Hello all pixman project members,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;color:#1F497D">From my email address, you can know that I am from silicon company Hisilicon in China, I am working with Android system on SOC platform.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;color:#1F497D">As we already known that Pixman embedded into Android system(android version is Kitkat, Pixman version is 0.30.0).<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;color:#1F497D">I think Pixman already used by many applications in ARM soc system,
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;color:#1F497D">Pixman used many optimization code according to different CPU architecture, such as X86, mips, arm. SIMD instruction set including SSE, NEON and so on.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;color:#1F497D">Now we just talk ARM CPU and NEON.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;color:#1F497D">A question from me is that have you tested Pixman on ARM big.LITTLE cpu?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;color:#1F497D">Now I found many games use pixel compositing feature Pixman supported, but the same pixel before compositing with the different output.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;color:#1F497D">The compositing output is correct on old ARM CPU(cores less than 4), incorrect on newest ARM CPU, such as 8-cores A7 CPU, and big.LITTLE(4@A7, 4@A15).<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;color:#1F497D">Do you know this situation before? I found more games with this issue, compatible with qual-core ARM cpu, but pixel flaw with 8-core.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;color:#1F497D">Best Regards.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;color:#1F497D">CaoQiuhong/Software Engineer<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;color:#1F497D">+86+21+61753157<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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