c++ - Can't read DDS image header on Linux -


i use nvidia nv_dds utility load dds image files use in opengl program. works on windows fails on linux (ubuntu 12.10).initially thought problem nv_dds found fread() reads header bytes wrong offset on linux (gcc 4.7)

this block reads dds file marker , dds header:

// open file file *fp = fopen(filename.c_str(),"rb"); if (fp == null) {     return false; } // read in file marker, make sure dds file  char filecode[4]; fread(filecode, 1, 4, fp); if (strncmp(filecode, "dds ", 4) != 0) {     fclose(fp);     return false; }  // read in dds header dds_header ddsh; fread(&ddsh, 1,sizeof(dds_header)  , fp);

when through contents of dds_header instance can see couple of real values assigned wrong properties , rest junk.

then, if comment out "dds" marker check fread() :

// open file file *fp = fopen(filename.c_str(), "rb"); if (fp == null) {     return false; } // read in file marker, make sure dds file /* comment out test char filecode[4]; fread(filecode, 1, 4, fp); if (strncmp(filecode, "dds ", 4) != 0) {     fclose(fp);     return false; } */ // read in dds header dds_header ddsh;    fread(&ddsh, sizeof( dds_header ),1 , fp);//sizeof( dds_header )

then image width value imageheight property of dds_header.the rest of properties still junk.

all doesn't happen when test on windows machine. possible fread() works differently on linux gcc on windows msvc compiler?

with gcc longs 4 bytes when compiled 32 bits , 8 bytes 64bits. use can use option -m32 or -m64 explicit target 32 or 64 bits.


Comments

Post a Comment

Popular posts from this blog

.htaccess - First slash is removed after domain when entering a webpage in the browser -

sometimes when hit address of webpage in browser, removes first slash after domain. examples: www.mywebsite.com/scripts/script_6.php -> trying load www.mywebsite.comscripts/script_6.php www.mywebsite.com/test.php -> trying load www.mywebsite.comtest.php after entering again, loads page. a .htaccess settings must wrong: rewritebase / errordocument 404 http://www.mywebsite.com/oops.php errordocument 401 /notallowed.php rewriteengine on # turn on rewriting engine #gzip <ifmodule mod_deflate.c> addoutputfilterbytype deflate text/text text/html text/plain text/xml text/css application/x- javascript application/javascript </ifmodule> #end gzip rewritecond %{http_host} ^mywebsite\.com rewriterule ^(.*)$ http://www.mywebsite.com$1 [r=permanent,l] directoryindex index6.php rewriterule ^termsofuse/?$ termsofuse.php [nc,l] # handle requests "adpolicy" rewriterule ^privacy-policy/?$ privacy-policy.php [nc,l] # handle requ...
Read more

Automatically create pages in phpfox -

i have array of information of places , wanna use them create multiple pages in phpfox site. first tried manually insert data in phpfox database (in tables of phpfox_pages , phpfox_pages_text ). the page shown in site when opening it's link, site says: the page looking cannot found. do know other tables should manipulate make work? or know plugin phpfox same? thanks, solved ( @purefan guide): "pages" has user if take @ phpfox_user table, you'll found out how fetch new records on that. there 2 ambiguous fields in table ( password & password_salt ). can use script create values fields: <?php function generaterandomstring() { $length = 164; $characters = '-_0123456789abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz'; $randomstring = ''; ($i = 0; $i < $length; $i++) { $randomstring .= $characters[rand(0, strlen($characters) - 1)]; } return $randomstring; } $ssalt = '';...
Read more

c# - Farseer ContactListener is not working -

i'm using farseer in xna project, have trouble contactlistener. created class contactlistener these 2 error messages , don't know how fix problems. the type or namespace name 'contactlistener' not found (are missing using directive or assembly reference?) the type or namespace name 'contactimpulse' not found (are missing using directive or assembly reference?) what wrong contactlistener class? class mycontactlistener: contactlistener { void begincontact(contact contact) { /* handle begin event */ } void endcontact(contact contact) { /* handle end event */ } void presolve(contact contact, ref manifold oldmanifold) { fixture fixturea = contact.fixturea; fixture fixtureb = contact.fixtureb; if (fixtureb.collisioncategories == category.cat10) { contact.enabled = false; } } void postsolve(contact contact, ref contactimpulse impulse) { /* handle post-solve event */ } }...
Read more