<html dir="ltr"> <head> <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"> <style id="mysingle_style" type="text/css">  </style><style id="owaParaStyle" type="text/css">P {margin-top:0;margin-bottom:0;}</style> </head> <body ocsi="0" fpstyle="1"> <div style="direction: ltr;font-family: Tahoma;color: #000000;font-size: 10pt;">Hi Gaurav, If you use all the cairo_move_to() calls then you end up with a rectangle made up of four discontinuous line segments. http://www.bryceharrington.org/files/g.pruthi.before.png Instead just use the first cairo_move_to() and then only cairo_line_to() after that. See: <a href="http://www.bryceharrington.org/files/g.pruthi.c" target="_blank">http://www.bryceharrington.org/files/g.pruthi.c</a> <a href="http://www.bryceharrington.org/files/g.pruthi.after.png" target="_blank">http://www.bryceharrington.org/files/g.pruthi.after.png</a> Btw, the final cairo_line_to() call (when i==3) is unnecessary in this case; the cairo_close_path() call will complete the last line of the rect. http://www.bryceharrington.org/files/g.pruthi.c <div> I couldn't find the tutorial that this sample code comes from. If you could please point me at it; if it's a cairographics.org tutorial it may need to be improved. <div style="font-family:Tahoma; font-size:13px">-- Bryce Harrington Senior Open Source Developer - b.harrington@samsung.com Open Source Group - Samsung Research America </div> </div> <div style="font-family: Times New Roman; color: #000000; font-size: 16px"> <hr tabindex="-1"> <div style="direction: ltr;" id="divRpF880339">From: Gaurav Pruthi [g.pruthi@samsung.com] Sent: Thursday, July 04, 2013 1:07 AM To: Bryce W. Harrington Subject: Query regarding Cairo. </div> <div></div> <div> Hi Bryce, I found you on cairo mailing list. Just have one query if you have time to look into. <span style="white-space:normal; text-transform:none; word-spacing:0px; float:none; color:rgb(34,34,34); font:12px arial,sans-serif; display:inline!important; letter-spacing:normal; background-color:rgb(255,255,255); text-indent:0px"> I have just started using cairo library... I have seen examples to fill a <span style="white-space:normal; text-transform:none; word-spacing:0px; float:none; color:rgb(34,34,34); font:12px arial,sans-serif; display:inline!important; letter-spacing:normal; background-color:rgb(255,255,255); text-indent:0px">polygon which are repetitive calls to move_to() and line_to() routines<span style="white-space:normal; text-transform:none; word-spacing:0px; float:none; color:rgb(34,34,34); font:12px arial,sans-serif; display:inline!important; letter-spacing:normal; background-color:rgb(255,255,255); text-indent:0px">. <span style="white-space:normal; text-transform:none; word-spacing:0px; float:none; color:rgb(34,34,34); font:12px arial,sans-serif; display:inline!important; letter-spacing:normal; background-color:rgb(255,255,255); text-indent:0px">When I tried following snippet of code which is mentioned in most of the tutorials, but <span style="white-space:normal; text-transform:none; word-spacing:0px; float:none; color:rgb(34,34,34); font:12px arial,sans-serif; display:inline!important; letter-spacing:normal; background-color:rgb(255,255,255); text-indent:0px">it didn't worked. <span style="white-space:normal; text-transform:none; word-spacing:0px; float:none; color:rgb(34,34,34); font:12px arial,sans-serif; display:inline!important; letter-spacing:normal; background-color:rgb(255,255,255); text-indent:0px">void drawRectangle(cairo_t* cr) <span style="white-space:normal; text-transform:none; word-spacing:0px; float:none; color:rgb(34,34,34); font:12px arial,sans-serif; display:inline!important; letter-spacing:normal; background-color:rgb(255,255,255); text-indent:0px">{ <span style="white-space:normal; text-transform:none; word-spacing:0px; float:none; color:rgb(34,34,34); font:12px arial,sans-serif; display:inline!important; letter-spacing:normal; background-color:rgb(255,255,255); text-indent:0px"> cairo_path_t path; <span style="white-space:normal; text-transform:none; word-spacing:0px; float:none; color:rgb(34,34,34); font:12px arial,sans-serif; display:inline!important; letter-spacing:normal; background-color:rgb(255,255,255); text-indent:0px"> cairo_path_data_t pathData[4]; <span style="white-space:normal; text-transform:none; word-spacing:0px; float:none; color:rgb(34,34,34); font:12px arial,sans-serif; display:inline!important; letter-spacing:normal; background-color:rgb(255,255,255); text-indent:0px"> pathData[0].point.x = 10 ; <span style="white-space:normal; text-transform:none; word-spacing:0px; float:none; color:rgb(34,34,34); font:12px arial,sans-serif; display:inline!important; letter-spacing:normal; background-color:rgb(255,255,255); text-indent:0px"> pathData[0].point.y = 20; <span style="white-space:normal; text-transform:none; word-spacing:0px; float:none; color:rgb(34,34,34); font:12px arial,sans-serif; display:inline!important; letter-spacing:normal; background-color:rgb(255,255,255); text-indent:0px"> <span style="white-space:normal; text-transform:none; word-spacing:0px; float:none; color:rgb(34,34,34); font:12px arial,sans-serif; display:inline!important; letter-spacing:normal; background-color:rgb(255,255,255); text-indent:0px"> pathData[1].point.x = 210; <span style="white-space:normal; text-transform:none; word-spacing:0px; float:none; color:rgb(34,34,34); font:12px arial,sans-serif; display:inline!important; letter-spacing:normal; background-color:rgb(255,255,255); text-indent:0px"> pathData[1].point.y = 20; <span style="white-space:normal; text-transform:none; word-spacing:0px; float:none; color:rgb(34,34,34); font:12px arial,sans-serif; display:inline!important; letter-spacing:normal; background-color:rgb(255,255,255); text-indent:0px"> pathData[2].point.x = 210; <span style="white-space:normal; text-transform:none; word-spacing:0px; float:none; color:rgb(34,34,34); font:12px arial,sans-serif; display:inline!important; letter-spacing:normal; background-color:rgb(255,255,255); text-indent:0px"> pathData[2].point.y = 320; <span style="white-space:normal; text-transform:none; word-spacing:0px; float:none; color:rgb(34,34,34); font:12px arial,sans-serif; display:inline!important; letter-spacing:normal; background-color:rgb(255,255,255); text-indent:0px"> pathData[3].point.x = 10; <span style="white-space:normal; text-transform:none; word-spacing:0px; float:none; color:rgb(34,34,34); font:12px arial,sans-serif; display:inline!important; letter-spacing:normal; background-color:rgb(255,255,255); text-indent:0px"> pathData[3].point.y = 320; <span style="white-space:normal; text-transform:none; word-spacing:0px; float:none; color:rgb(34,34,34); font:12px arial,sans-serif; display:inline!important; letter-spacing:normal; background-color:rgb(255,255,255); text-indent:0px"> //Set path data in path <span style="white-space:normal; text-transform:none; word-spacing:0px; float:none; color:rgb(34,34,34); font:12px arial,sans-serif; display:inline!important; letter-spacing:normal; background-color:rgb(255,255,255); text-indent:0px"> cairo_move_to(cr, pathData[0].point.x, pathData[0].point.y); <span style="white-space:normal; text-transform:none; word-spacing:0px; float:none; color:rgb(34,34,34); font:12px arial,sans-serif; display:inline!important; letter-spacing:normal; background-color:rgb(255,255,255); text-indent:0px"> for(int i =0 ; i<= 3; ++i) <span style="white-space:normal; text-transform:none; word-spacing:0px; float:none; color:rgb(34,34,34); font:12px arial,sans-serif; display:inline!important; letter-spacing:normal; background-color:rgb(255,255,255); text-indent:0px"> { <span style="white-space:normal; text-transform:none; word-spacing:0px; float:none; color:rgb(34,34,34); font:12px arial,sans-serif; display:inline!important; letter-spacing:normal; background-color:rgb(255,255,255); text-indent:0px"> cairo_move_to(cr, pathData[i].point.x, pathData[i].point.y); <span style="white-space:normal; text-transform:none; word-spacing:0px; float:none; color:rgb(34,34,34); font:12px arial,sans-serif; display:inline!important; letter-spacing:normal; background-color:rgb(255,255,255); text-indent:0px"> if(i == 3){ <span style="white-space:normal; text-transform:none; word-spacing:0px; float:none; color:rgb(34,34,34); font:12px arial,sans-serif; display:inline!important; letter-spacing:normal; background-color:rgb(255,255,255); text-indent:0px"> cairo_line_to(cr, pathData[0].point.x, pathData[0].point.y); <span style="white-space:normal; text-transform:none; word-spacing:0px; float:none; color:rgb(34,34,34); font:12px arial,sans-serif; display:inline!important; letter-spacing:normal; background-color:rgb(255,255,255); text-indent:0px"> } <span style="white-space:normal; text-transform:none; word-spacing:0px; float:none; color:rgb(34,34,34); font:12px arial,sans-serif; display:inline!important; letter-spacing:normal; background-color:rgb(255,255,255); text-indent:0px"> else <span style="white-space:normal; text-transform:none; word-spacing:0px; float:none; color:rgb(34,34,34); font:12px arial,sans-serif; display:inline!important; letter-spacing:normal; background-color:rgb(255,255,255); text-indent:0px"> cairo_line_to(cr, pathData[i+1].point.x, pathData[i+1].point.y); <span style="white-space:normal; text-transform:none; word-spacing:0px; float:none; color:rgb(34,34,34); font:12px arial,sans-serif; display:inline!important; letter-spacing:normal; background-color:rgb(255,255,255); text-indent:0px"> } <span style="white-space:normal; text-transform:none; word-spacing:0px; float:none; color:rgb(34,34,34); font:12px arial,sans-serif; display:inline!important; letter-spacing:normal; background-color:rgb(255,255,255); text-indent:0px"> <span style="white-space:normal; text-transform:none; word-spacing:0px; float:none; color:rgb(34,34,34); font:12px arial,sans-serif; display:inline!important; letter-spacing:normal; background-color:rgb(255,255,255); text-indent:0px"> cairo_close_path(cr); <span style="white-space:normal; text-transform:none; word-spacing:0px; float:none; color:rgb(34,34,34); font:12px arial,sans-serif; display:inline!important; letter-spacing:normal; background-color:rgb(255,255,255); text-indent:0px"> cairo_set_source_rgb(cr,1.0,0.<span style="white-space:normal; text-transform:none; word-spacing:0px; float:none; color:rgb(34,34,34); font:12px arial,sans-serif; display:inline!important; letter-spacing:normal; background-color:rgb(255,255,255); text-indent:0px">0,0.0); <span style="white-space:normal; text-transform:none; word-spacing:0px; float:none; color:rgb(34,34,34); font:12px arial,sans-serif; display:inline!important; letter-spacing:normal; background-color:rgb(255,255,255); text-indent:0px"> cairo_fill_preserve(cr); <span style="white-space:normal; text-transform:none; word-spacing:0px; float:none; color:rgb(34,34,34); font:12px arial,sans-serif; display:inline!important; letter-spacing:normal; background-color:rgb(255,255,255); text-indent:0px"> cairo_set_source_rgba(cr,0.0,<span style="white-space:normal; text-transform:none; word-spacing:0px; float:none; color:rgb(34,34,34); font:12px arial,sans-serif; display:inline!important; letter-spacing:normal; background-color:rgb(255,255,255); text-indent:0px">1.0,0.0,0.5); <span style="white-space:normal; text-transform:none; word-spacing:0px; float:none; color:rgb(34,34,34); font:12px arial,sans-serif; display:inline!important; letter-spacing:normal; background-color:rgb(255,255,255); text-indent:0px"> cairo_set_line_width(cr,10.0); <span style="white-space:normal; text-transform:none; word-spacing:0px; float:none; color:rgb(34,34,34); font:12px arial,sans-serif; display:inline!important; letter-spacing:normal; background-color:rgb(255,255,255); text-indent:0px"> cairo_stroke(cr); <span style="white-space:normal; text-transform:none; word-spacing:0px; float:none; color:rgb(34,34,34); font:12px arial,sans-serif; display:inline!important; letter-spacing:normal; background-color:rgb(255,255,255); text-indent:0px"> <span style="white-space:normal; text-transform:none; word-spacing:0px; float:none; color:rgb(34,34,34); font:12px arial,sans-serif; display:inline!important; letter-spacing:normal; background-color:rgb(255,255,255); text-indent:0px">} <span style="white-space:normal; text-transform:none; word-spacing:0px; float:none; color:rgb(34,34,34); font:12px arial,sans-serif; display:inline!important; letter-spacing:normal; background-color:rgb(255,255,255); text-indent:0px">But this one worked where I am moving to the first point and just making line_to() calls is working .. below one: <span style="white-space:normal; text-transform:none; word-spacing:0px; float:none; color:rgb(34,34,34); font:12px arial,sans-serif; display:inline!important; letter-spacing:normal; background-color:rgb(255,255,255); text-indent:0px">void drawRectangle(cairo_t* cr) <span style="white-space:normal; text-transform:none; word-spacing:0px; float:none; color:rgb(34,34,34); font:12px arial,sans-serif; display:inline!important; letter-spacing:normal; background-color:rgb(255,255,255); text-indent:0px">{ <span style="white-space:normal; text-transform:none; word-spacing:0px; float:none; color:rgb(34,34,34); font:12px arial,sans-serif; display:inline!important; letter-spacing:normal; background-color:rgb(255,255,255); text-indent:0px"> cairo_path_t path; <span style="white-space:normal; text-transform:none; word-spacing:0px; float:none; color:rgb(34,34,34); font:12px arial,sans-serif; display:inline!important; letter-spacing:normal; background-color:rgb(255,255,255); text-indent:0px"> cairo_path_data_t pathData[4]; <span style="white-space:normal; text-transform:none; word-spacing:0px; float:none; color:rgb(34,34,34); font:12px arial,sans-serif; display:inline!important; letter-spacing:normal; background-color:rgb(255,255,255); text-indent:0px"> pathData[0].point.x = 10 ; <span style="white-space:normal; text-transform:none; word-spacing:0px; float:none; color:rgb(34,34,34); font:12px arial,sans-serif; display:inline!important; letter-spacing:normal; background-color:rgb(255,255,255); text-indent:0px"> pathData[0].point.y = 20; <span style="white-space:normal; text-transform:none; word-spacing:0px; float:none; color:rgb(34,34,34); font:12px arial,sans-serif; display:inline!important; letter-spacing:normal; background-color:rgb(255,255,255); text-indent:0px"> <span style="white-space:normal; text-transform:none; word-spacing:0px; float:none; color:rgb(34,34,34); font:12px arial,sans-serif; display:inline!important; letter-spacing:normal; background-color:rgb(255,255,255); text-indent:0px"> pathData[1].point.x = 210; <span style="white-space:normal; text-transform:none; word-spacing:0px; float:none; color:rgb(34,34,34); font:12px arial,sans-serif; display:inline!important; letter-spacing:normal; background-color:rgb(255,255,255); text-indent:0px"> pathData[1].point.y = 20; <span style="white-space:normal; text-transform:none; word-spacing:0px; float:none; color:rgb(34,34,34); font:12px arial,sans-serif; display:inline!important; letter-spacing:normal; background-color:rgb(255,255,255); text-indent:0px"> pathData[2].point.x = 210; <span style="white-space:normal; text-transform:none; word-spacing:0px; float:none; color:rgb(34,34,34); font:12px arial,sans-serif; display:inline!important; letter-spacing:normal; background-color:rgb(255,255,255); text-indent:0px"> pathData[2].point.y = 320; <span style="white-space:normal; text-transform:none; word-spacing:0px; float:none; color:rgb(34,34,34); font:12px arial,sans-serif; display:inline!important; letter-spacing:normal; background-color:rgb(255,255,255); text-indent:0px"> pathData[3].point.x = 10; <span style="white-space:normal; text-transform:none; word-spacing:0px; float:none; color:rgb(34,34,34); font:12px arial,sans-serif; display:inline!important; letter-spacing:normal; background-color:rgb(255,255,255); text-indent:0px"> pathData[3].point.y = 320; <span style="white-space:normal; text-transform:none; word-spacing:0px; float:none; color:rgb(34,34,34); font:12px arial,sans-serif; display:inline!important; letter-spacing:normal; background-color:rgb(255,255,255); text-indent:0px"> <span style="white-space:normal; text-transform:none; word-spacing:0px; float:none; color:rgb(34,34,34); font:12px arial,sans-serif; display:inline!important; letter-spacing:normal; background-color:rgb(255,255,255); text-indent:0px"> cairo_move_to(cr, pathData[0].point.x, pathData[0].point.y); <span style="white-space:normal; text-transform:none; word-spacing:0px; float:none; color:rgb(34,34,34); font:12px arial,sans-serif; display:inline!important; letter-spacing:normal; background-color:rgb(255,255,255); text-indent:0px"> for(int i =0 ; i< =3 ; ++i) <span style="white-space:normal; text-transform:none; word-spacing:0px; float:none; color:rgb(34,34,34); font:12px arial,sans-serif; display:inline!important; letter-spacing:normal; background-color:rgb(255,255,255); text-indent:0px"> { <span style="white-space:normal; text-transform:none; word-spacing:0px; float:none; color:rgb(34,34,34); font:12px arial,sans-serif; display:inline!important; letter-spacing:normal; background-color:rgb(255,255,255); text-indent:0px"> <span style="white-space:normal; text-transform:none; word-spacing:0px; float:none; color:rgb(34,34,34); font:12px arial,sans-serif; display:inline!important; letter-spacing:normal; background-color:rgb(255,255,255); text-indent:0px"> cairo_line_to(cr, pathData[i].point.x, pathData[i].point.y); <span style="white-space:normal; text-transform:none; word-spacing:0px; float:none; color:rgb(34,34,34); font:12px arial,sans-serif; display:inline!important; letter-spacing:normal; background-color:rgb(255,255,255); text-indent:0px"> } <span style="white-space:normal; text-transform:none; word-spacing:0px; float:none; color:rgb(34,34,34); font:12px arial,sans-serif; display:inline!important; letter-spacing:normal; background-color:rgb(255,255,255); text-indent:0px"> <span style="white-space:normal; text-transform:none; word-spacing:0px; float:none; color:rgb(34,34,34); font:12px arial,sans-serif; display:inline!important; letter-spacing:normal; background-color:rgb(255,255,255); text-indent:0px"> cairo_close_path(cr); <span style="white-space:normal; text-transform:none; word-spacing:0px; float:none; color:rgb(34,34,34); font:12px arial,sans-serif; display:inline!important; letter-spacing:normal; background-color:rgb(255,255,255); text-indent:0px"> cairo_set_source_rgb(cr,1.0,0.<span style="white-space:normal; text-transform:none; word-spacing:0px; float:none; color:rgb(34,34,34); font:12px arial,sans-serif; display:inline!important; letter-spacing:normal; background-color:rgb(255,255,255); text-indent:0px">0,0.0); <span style="white-space:normal; text-transform:none; word-spacing:0px; float:none; color:rgb(34,34,34); font:12px arial,sans-serif; display:inline!important; letter-spacing:normal; background-color:rgb(255,255,255); text-indent:0px"> cairo_fill_preserve(cr); <span style="white-space:normal; text-transform:none; word-spacing:0px; float:none; color:rgb(34,34,34); font:12px arial,sans-serif; display:inline!important; letter-spacing:normal; background-color:rgb(255,255,255); text-indent:0px"> cairo_set_source_rgba(cr,0.0,<span style="white-space:normal; text-transform:none; word-spacing:0px; float:none; color:rgb(34,34,34); font:12px arial,sans-serif; display:inline!important; letter-spacing:normal; background-color:rgb(255,255,255); text-indent:0px">1.0,0.0,0.5); <span style="white-space:normal; text-transform:none; word-spacing:0px; float:none; color:rgb(34,34,34); font:12px arial,sans-serif; display:inline!important; letter-spacing:normal; background-color:rgb(255,255,255); text-indent:0px"> cairo_set_line_width(cr,10.0); <span style="white-space:normal; text-transform:none; word-spacing:0px; float:none; color:rgb(34,34,34); font:12px arial,sans-serif; display:inline!important; letter-spacing:normal; background-color:rgb(255,255,255); text-indent:0px"> cairo_stroke(cr); <span style="white-space:normal; text-transform:none; word-spacing:0px; float:none; color:rgb(34,34,34); font:12px arial,sans-serif; display:inline!important; letter-spacing:normal; background-color:rgb(255,255,255); text-indent:0px"> <span style="white-space:normal; text-transform:none; word-spacing:0px; float:none; color:rgb(34,34,34); font:12px arial,sans-serif; display:inline!important; letter-spacing:normal; background-color:rgb(255,255,255); text-indent:0px">} First sample is based on the examples available on internet. Can you pls tell whats the problem with the first one. Thanks a lot for your time. Gaurav Pruthi Display Platform Samsung R&D India - Delhi Lab <table id="confidentialsignimg"> <tbody> <tr> <td> <img src="UrlBlockedError.aspx"> </td> </tr> </tbody> </table> </div> </div> </div> </body> </html>