javascript - Is there any method for `WebGLRenderingContext` as in `CanvasRenderingContext2D.getImageData()`? -

-

suppose can imagedata canvasrenderingcontext2d.

var element = document.getelementbyid('somecanvas'); var context = element.getcontext('2d'); var imagedata = context.getimagedata(0, 0, width, height);

i wonder if can done webglrenderingcontext well?

var element = document.getelementbyid('somecanvas'); var context = element.getcontext('webgl'); /* image data ... */

thank lot!

it doesn't work same can of pixels in drawing buffer using webglrenderingcontext.readpixels. make sure call before exit event rendered pixels.

var context = element.getcontext('webgl'); var pixels = new uint8array(context.drawingbufferwidth * context.drawingbufferheight * 4); context.readpixels(   0,    0,    context.drawingbufferwidth,    context.drawingbufferheight,    context.rgba,    context.unsigned_byte,    pixels);

Comments

Post a Comment

Popular posts from this blog

compilation - PHP install fails on Ubuntu 14 (make: *** [sapi/cli/php] Error 1) PHP 5.6.20 -

-
i using following configuration: ./configure --with-libdir=lib --with-config-file-path=/etc/ --with-config-file-scan-dir=/etc/php5/mods-available --with-pear --enable-cli --enable-intl --with-icu-dir=/opt/icu4c --enable-bcmath --disable-cgi --enable-fpm --with-zlib --with-openssl --with-kerberos --with-bz2 --with-curl --enable-ftp --enable-zip --enable-exif --with-gd --with-jpeg-dir=/usr/lib64 --with-freetype-dir=/usr/lib64 --enable-gd-native-ttf --with-gettext --with-gmp --with-mhash --with-iconv --with-imap --with-mysql --with-imap-ssl --enable-sockets --enable-soap --with-xmlrpc --with-mcrypt --enable-mbstring --enable-embedded-mysqli --with-mysqli=mysqlnd --with-mysql-sock --with-sqlite3 --with-pdo-mysql --with-pdo-mysql=mysqlnd --with-pdo-sqlite --enable-phar --enable-pcntl and make fails after sometime giving following error: collect2: error: ld returned 1 exit status make: *** [sapi/cli/php] error 1 i searched , docs tell using make clean, did not , ‘-lresolve’ in ma...
Read more

sql - Postgresql tables exists, but getting "relation does not exist" when querying -

-
Image
i have postgresql db number of tables. if query: select column_name information_schema.columns table_name="my_table"; i list of columns returned properly. however, when query: select * "my_table"; i error: (programmingerror) relation "my_table" not exist 'select *\n "my_table"\n' {} any thoughts on why can columns, can't query table? goal able query table. you have include schema if isnt public one select * <schema>."my_table" or can change default schema show search_path; set search_path my_schema; check table schema here select * information_schema.columns for example if table on default schema public both works ok select * parroquias_region select * public.parroquias_region but sectors need specify schema select * map_update.sectores_point
Read more

java - nested exception is org.hibernate.exception.SQLGrammarException: could not extract ResultSet Hibernate+SpringMVC -

-
i trying fetch records database , having above error this classs appropriate getters , setters public class user { private int id; private string username; private string password; private string email; i have create database , inserted data below configuration <bean id="datasource" class="org.apache.commons.dbcp2.basicdatasource" destroy-method="close"> <property name="driverclassname" value="com.mysql.jdbc.driver"/> <property name="url" value="jdbc:mysql://localhost:3306/usersdb"/> <property name="username" value="root"/> <property name="password" value=""/> </bean> this complete stacktrace severe: servlet.service() servlet [appservlet] in context path [/spring] threw exception [request processing failed; nested exception org.hibernate.exception.sqlgrammarexception: not ...
Read more