<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv=Content-Type content="text/html; charset=utf-8"><meta name=Generator content="Microsoft Word 14 (filtered medium)"><style><!--
/* Font Definitions */
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:Tahoma;
panose-1:2 11 6 4 3 5 4 4 2 4;}
@font-face
{font-family:Webdings;
panose-1:5 3 1 2 1 5 9 6 7 3;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"Times New Roman","serif";}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
span.EmailStyle17
{mso-style-type:personal-reply;
font-family:"Calibri","sans-serif";
color:#1F497D;}
.MsoChpDefault
{mso-style-type:export-only;
font-family:"Calibri","sans-serif";}
@page WordSection1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Urbano,<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'>We use tiling to generate pictures at higher resolutions. The viewport must be smaller than the screen size, or it will not work on most platforms. See:<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><a href="http://www.opengl.org/resources/code/samples/sig99/advanced99/notes/node30.html">http://www.opengl.org/resources/code/samples/sig99/advanced99/notes/node30.html</a><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'>See also,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><a href="http://www.mesa3d.org/brianp/TR.html">http://www.mesa3d.org/brianp/TR.html</a><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'>With a screen DPI around 100, using nine tiles can be used to generate a 300dpi raster image. In your case, use as many tiles as necessary to get the tile size less than the screen size. Then, use any number of techniques to render off-screen.<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'>Roy Dennington<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Semichem, Inc.<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><div style='border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in 4.0pt'><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> mesa-users-bounces+roy=semichem.com@lists.freedesktop.org [mailto:mesa-users-bounces+roy=semichem.com@lists.freedesktop.org] <b>On Behalf Of </b>Urbano Alves<br><b>Sent:</b> Wednesday, November 30, 2011 8:01 AM<br><b>To:</b> mesa-users@lists.freedesktop.org<br><b>Subject:</b> [Mesa-users] HELP WITH OSMESA LIBRARY<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>Hi,<br><br>Sorry by this email and question.<br><br>Anyway thanks.<br><br>Well, I have a program in C++ and with some openGL libraries (GLUT and GLUI).<br><br>This program make some statistical calculation like cluster analysis.<br><br>Some of them are a very large picture.<br><br>They are more bigger than the screen size.<br><br>Well, we can talk about 2000x5000 pixel.<br><br>and<br><br>If the picture size is less than screen size no problem,<br><br>the program work and can save a PNG file.<br><br>But, if the picture size is bigger than the screen size I can't save it.<br><br>AND I NEED THIS PICTURES.<br><br>Well I think the osmesa.h library can help.<br><br>and I try it, and it don't work. No error, but the buffer are empty (fill with zero).<br><br>Well some idea?<br><br>Thanks<o:p></o:p></p></div><p class=MsoNormal><br><br clear=all><o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><p class=MsoNormal>-- <o:p></o:p></p><p class=MsoNormal><span style='font-size:24.0pt;font-family:Webdings;color:green'>P</span><span style='color:navy'> </span><span style='font-size:7.5pt;font-family:"Arial","sans-serif";color:green'>Antes de imprimir este e-mail pense bem se é necessário fazê-lo.</span><o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p></div></div></body></html>