i have added overlay image in fabric js . But need to add text on this overlay
image in canvas. it is made in fabric.js. how to do that?
I guess you are trying to bring text layer on top of image layer. Like z- index in css.
You need to set sendtoBack for image. Then text layer will be in front.
canvas.sendToBack(img);
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I just received the XD file from the designer, now am trying to extract the nav area image from the canvas but image is too spread out from the canvas how it can be cropped to the area of the nav.
Use Adobe Photoshop To Resize them to Fit Original image
or
if you want part of image you can use one of image magnify plugins first
they will fit image to canvas
then use export
Also you can use Web Export Plugins
I am using Lazarus.
I have put 2 images on a form and synchronized their positions and sizes.
I can textout to both images, and after I made the ontop image transparent I can see the combined content of both images.
I can add further text to the bottom image and see it, but I can't see text I try to add to the transparent image.
I used the following code to make the top image transparent
image2.picture.Bitmap.TransparentColor:=clWhite;
image2.transparent:=true;
I guess I need to play with the image bitmap, but I can't find a solution that is not using other software.
Can someone help me with this please?
There is requirement where parsys should be added on top of an image. It is like a background image with the provision of parsys so that other components can be dragged and dropped on top of it. I am using html5smartimage for image component. But, no clue yet on how I can get the parsys on top of the image. Please help if you find any ideas. Thanks.
is the image authorable? If so, how do you intend to provide click-area for the authors to change the image vs edit items in the parsys.
If the image isn't authorable, just target the CSS for your parsys and set the image.
If the image is authorable, in edit mode you want the image to be distinct from the parsys and have separate clickable areas. Then in preview/disabled modes you would generate the actually desired markup & CSS to position the parsys content over the background image.
I'm trying to clip an image overlay in Google Maps API, however without success. I can clip a HTML image successfully and overlay it on a Google MAP by using the CSS clip property and z-index property, however that's no use, as the image does not adjust to the Google map zoom and movements. i.e. the image is not bound to the Google MAP object in any way, doesn't respond to map changes.
If I assign the Google Map overlay to the cropped image source, it simply uses the original un-cropped source and not the cropped page image element. That's just how the image.src property works.
I successfully added an image overlay for Google MAPS, but there does not seem to be any clipping or cropping function for them. There is text on the image that I don't want to display for this application, but I don't want to crop the original source file image, as it's used for multiple display purposes.
historicalOverlay = new google.maps.GroundOverlay(imageurl,imageBounds);
historicalOverlay.setMap(map);
I need imageurl to point to a clipped version in memory or something like that or the clipped form image element, but not its un-clipped source image. Any ideas ?
The GroundOverlay class in Google Maps javascript API V3 does not provide any support for in-browser clipping/cropping of the image before display.
Because we needed that capability, plus some others like image rotation and non-rectangular images, we wrote a GroundOverlayEX javascript class that supports everything that the Google Earth version of GroundOverlay supports, including browser-side clipping/cropping of the image to-be-displayed.
The javascript class is open-source on Github at: https://github.com/azmikemm/GroundOverlayEX. There is API documentation as well (documentation.txt). All images shown by the GroundOverlayEX class are integral to the map, and will drag with the map, and zoom with the map.
A working functional example of the class in-action (with some clipped/ cropped images) is at: https://sites.google.com/site/issearthatnight/
If you turn off the VIIRS checkbox, and set the transparency down to midway, you'll see the images pretty plainly, and see that some are cropped (all are stored in NASA's servers as rectangles, so images that are square-ish or look like slices have been cropped by the GroundOverlayEX class).
First of all I will explain my situation so you can know my problem a little better. I'm making a HTML5 app. I have a canvas, and using a color picker you can change the color of the canvas. Now i have a picture which I want to put on the canvas but that pictures color needs to be changed using a color picker. So i need to replace, lets say, black color on that picture and put it on the canvas so it dosnt screw up the background.
So that will look like this:
1st color picker- changes the color of the canvas
2nd color picker - replaces the black color on the image with the one in the color picker and puts it on the canvas
Now my problem is how to replace the color on the image without reloading the page.
My only condition is no using silverlight, flash, java or any other similar tehnology that need 3rd party software to be installed on the device.
Thanks in advance.
If you dont understand my query fully, feel free to ask.
My approach with a JS only solution could be:
Loading the image inside a canvas element. Look at the MDC canvas tutorial
Trigger the user click on the canvas and get the pixel color (see links below to know how to get the color of a pixel) and look at this answer to get the mouse position
Substitute all the colors in the canvas with the one the user pick. For some examples about pixel manipulation:
Pushing pixel with canvas at Mozilla Hacks
http://beej.us/blog/2010/02/html5s-canvas-part-ii-pixel-manipulation/
This JS at mezzoblue apply heavy filter to an image
After some canvas experiment I notice that mostly in all the browser the pixel manipulation with canvas could be very slow also with small images. So another experiment to do could be to get the pixel color and then:
pass the color information to a PHP (or another server side script) with an AJAX call
do the color manipulation with an image library like GD or imagemagik
return back your image with the Ajax response
reload your canvas with the modified version of the image