I have just found an example (http://c.gwt-examples.com/home/ui/canvas).
The only problem is to convert ImageData to an byte array :) Regards! 2016-01-25 12:08 GMT-02:00 Julio Heitor Nobrega <juliohnobr...@gmail.com>: > Does anyone have some examples regarding the Canvas class? > > I've seen the java doc API but the only methods i think that could be > useful was: > > Context2d > <http://www.gwtproject.org/javadoc/latest/com/google/gwt/canvas/dom/client/Context2d.html> > *getContext2d > <http://www.gwtproject.org/javadoc/latest/com/google/gwt/canvas/client/Canvas.html#getContext2d%28%29>* > () > Returns a 2D rendering context. > void *setCoordinateSpaceHeight > <http://www.gwtproject.org/javadoc/latest/com/google/gwt/canvas/client/Canvas.html#setCoordinateSpaceHeight%28int%29>* > (int height) > Sets the height of the internal canvas coordinate space. > void *setCoordinateSpaceWidth > <http://www.gwtproject.org/javadoc/latest/com/google/gwt/canvas/client/Canvas.html#setCoordinateSpaceWidth%28int%29>* > (int width) > Sets the width of the internal canvas coordinate space. > > 2016-01-14 16:36 GMT-02:00 Kirill Prazdnikov <pkir...@gmail.com>: > >> Canvas is an DOM Element. >> It can render Image Elements to itself in any resolution. >> However it may produce not nice results. >> >> It depends on what you need. >> >> On Thursday, January 14, 2016 at 9:17:36 PM UTC+3, Julio Heitor Nobrega >> wrote: >>> >>> Hi guys, >>> >>> thanks everyone for the answers! >>> >>> Greg, is Canvas a GWT framework or its a class that belong to GWT >>> itself? >>> >>> Do you have any example of use? >>> >>> Regards >>> >>> >>> >>> Em quinta-feira, 14 de janeiro de 2016 11:25:29 UTC-2, Julio Heitor >>> Nobrega escreveu: >>>> >>>> Hi guys, >>>> >>>> i am trying to upload images with 2mb size but i don't want to send the >>>> whole original image to the server. >>>> >>>> What i would like to do is reduce the image dimensions from, for >>>> example, *1000x1000* to *50x50* and reduce the file size >>>> from *2mb* to *~25kb* as well and at the end send the *~25kb* image to >>>> the server. >>>> >>>> I know there is the Scalr framework that does that in java, but its no >>>> compatible with GWT clients. >>>> >>>> Is there any client side GWT library that does the same thing as Scalr? >>>> >>>> Best Regards! >>>> >>>> >>>> -- >> You received this message because you are subscribed to a topic in the >> Google Groups "GWT Users" group. >> To unsubscribe from this topic, visit >> https://groups.google.com/d/topic/google-web-toolkit/8OfazCLtcLA/unsubscribe >> . >> To unsubscribe from this group and all its topics, send an email to >> google-web-toolkit+unsubscr...@googlegroups.com. >> To post to this group, send email to google-web-toolkit@googlegroups.com. >> Visit this group at https://groups.google.com/group/google-web-toolkit. >> For more options, visit https://groups.google.com/d/optout. >> > > -- You received this message because you are subscribed to the Google Groups "GWT Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to google-web-toolkit+unsubscr...@googlegroups.com. To post to this group, send email to google-web-toolkit@googlegroups.com. Visit this group at https://groups.google.com/group/google-web-toolkit. For more options, visit https://groups.google.com/d/optout.
