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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">Hi Robert,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">Sorry for the delay in responding. Thanks for the info below.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">I will investigate if the GL_MAX_3D_TEXTURE_SIZE and GL_MAX_ARRAY_TEXTURE_LAYERS_EXT enumerations have GLES counterparts that need to be considered.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">In regards to the fallback, wouldn’t the existing initialization of the two values to zero be sufficient?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">We encountered this issue of unexpected GL errors in some tests that exercise Microsoft’s OpenGL 1.1 software implementation. We use this version of OpenGL as a fallback when
issues with hardware graphics OpenGL are encountered.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">Thanks,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">Rick<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> osg-users [mailto:osg-users-bounces@lists.openscenegraph.org]
<b>On Behalf Of </b>Robert Osfield<br>
<b>Sent:</b> Thursday, June 30, 2016 11:39 AM<br>
<b>To:</b> OpenSceneGraph Users <osg-users@lists.openscenegraph.org><br>
<b>Subject:</b> Re: [osg-users] GL Error vulnerability in OSG 3.4.0 (invalid enum)<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">Hi Rick,<o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">If we need to protect the testing of certain features for certain drivers then glVersion number probably isn't sufficient as we have GL and GLES versions to consider.<o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">Another thing we'd need to do is provide a fallback in case we don't set the associated values.<o:p></o:p></p>
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<p class="MsoNormal">BTW, what platform and GL versions are you seeing issus with?<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Robert.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">On 30 June 2016 at 16:34, Rick Irons <<a href="mailto:Rick.Irons@mathworks.com" target="_blank">Rick.Irons@mathworks.com</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Hi,<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">openscenegraph/src/osg/GLExtensions.cpp should probably be checking the OpenGL version prior to using the GL_MAX_3D_TEXTURE_SIZE and GL_MAX_ARRAY_TEXTURE_LAYERS_EXT enums (see change
below). Otherwise, such calls will generate GL errors when using older versions of OpenGL. Any concerns with such a change?<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Thanks,<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Rick<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><img border="0" width="1869" height="514" style="width:19.4687in;height:5.3541in" id="_x0000_i1025" src="cid:image001.png@01D1E1B0.3CFA8600"><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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