I'm trying to use a canvas animation effect, it works well on firefox (desktop) but on mobile it fills like little space on top left corned of the page. On mobile chorome works well, updated my browser still not working, wonder if there is any trick making it work.
code
https://codepen.io/riazxrazor/pen/Gjomdp
here is the html file on separate server:
http://ntf.r-control.eu/canvas.html
Not posting code here, becouse it not display properly (goes out the code tag somehow)
Not able not to understand your doubt. But, you can try
canvas{
height: 100vh;
width: auto;
}
it will force your canvas to be the height and width of the viewport.
Related
This is my use case:
I have a web page with a responsive design. The page is vertically split in two halves, on the right hand side I want to show an image (a PDF page rendered as PNG or JPG). The size of the image should change as soon as the window is resized.
I thought I already solved this. I render the image on the server to be big enough for the biggest possible window size (according to our company setup). Chrome and Firefox scale down (and interpolate) the image just fine.
But then there is Internet Explorer 10: If the image size is scaled down to anything beneath 100% it looks like a million flies randomly covering the image ... I cannot seem to find a solution for this.
I learned that in the ol' days (IE7) there used to be a CSS rule for this called -ms-interpolation-mode that could be set to bicubic. But this has been declared obsolete and is not available in IE9+
Do I have to accept it like that? How can this setting be called obsolete if there is no interpolation for scaled images in IE9+? Is there any solution for this?
I know: Usually you don't let your browser scale your images. But do you have a better solution for this use case?
EDIT: I should have mentioned that the images in question are black text on white background. The effect is better visible when using thin lined fonts in the image.
EDIT2: Please recheck the fiddle (http://jsfiddle.net/7grxut1t/16/) before you close this thread. If you resize to a very small size in Chrome and IE you will see the difference!
The relevant part of my code
<div>
<img src="http://websocket.bplaced.net/test.png"/>
</div>
CSS:
div {
position: relative;
width: 50%;
height: 100%;
}
img {
width: 100%;
}
Ok, I found a quite dirty, yet applicable workaround
The angular service from https://gist.github.com/fisch0920/37bac5e741eaec60e983 uses the canvas element to interpolate the image on-the-fly. It works for me in IE10 (I am not sure about IE9- though).
Its method imageService.resizeStep is amazingly fast in IE ... it renders noticeably faster than the native Firefox image interpolation rendering.
I don't really like it, but it works and it doesn't even slow down the user's workflow.
Basic Scenario:
I have an image that is 2048x1536.
I have an html file that displays this image via CSS that specifies a width of 1024 and height of 768.
I have an UIWebView that displays that html page.
Problem:
On an iOS6 device, that image is resized to fit within that 1024x768 area. On an iOS7 device, that image is cropped to only display the top left quarter of the image.
Since iOS7, Chrome, and Safari all do the cropping option, I do believe that is the correct behavior (I strongly suspect that the latest webkit was updated to match this standard behavior). However, for business reasons, I still need the resize behavior.
Question:
Is it possible to still to keep that resize behavior even on iOS7?
EDIT - Additional info based on comments:
I presented a highly simplified scenario. I can't just put the image into an image view. The feature within my app allows 3rd parties to load their HTML content into it. Also, related to that, I can NOT modify the HTML contents. Basically, all I can do is create a NSUrlRequest for that HTML content and tell the UIWebView to load it via loadRequest.
Below are the HTML snippet and CSS snippet. But please keep in mind that I can't change this. I only control the objective-c end of things.
<body >
<div id="wrapper">
</div>
</body>
#wrapper {
background-color: #FFF;
position: relative;
width: 1024px;
height: 768px;
background: #FFF url(images/bg.jpg) no-repeat top left;
background-size: contain;
overflow: hidden;}
I'm currently working on a website. I noticed some elements are beeing cut off, if viewed in Firefox. I attached an Image, showing the problem.
The image below is a jsfiddle Screenshot from Firefox.
The code reproducing it is located here: JSFIDDLE
It's just an image, with an percantage value set with CSS.
.image-percent {
width: 30%;
}
The weird thing is, sometimes I am able to reproduce the bug and sometimes it simply vanishes after adding random HTML-Elements or other CSS-Properties.
Anyone already experiences this behaviour or know a workaround, forcing Firefox to resize the image the right way?
Actually found the solution in this thread Firefox blurs an image when scaled through external CSS or inline style.
Firefox implemented non-standart css property image-rendering https://developer.mozilla.org/en-US/docs/Web/CSS/image-rendering
Playing with different values this solution gives more or less appropriate result:
image-rendering:optimizeQuality;
http://jsfiddle.net/jGKkB/
You need to add the max-width property. this should fix it.
.image-percent {
width: 30%;
max-width: 100%;
}
Just for testing. try this:
.image-percent {
max-width: 100%;
height: auto;
width: auto;
}
Hope that's it.
Basically, your image resolution is very high and you are trying to display it in 30% width.
So your image's pixels is not showing properly. Whenever you show the large image to small or small image to large this will be happened.
You can create an another image with desired width.
First off, this is not the zoom issue that I've seen in other questions. Also, I'm testing this using an iPhone 4, running iOS 6. In working on a mobile project, I discovered an issue with the viewport tag and mobile safari. I distilled everything into code as basic as I could get it. I have there parameters set:
width=device-width
height=device-height
initial-scale=1.0
maximum-scale=1.0
user-scalable=no
It all works fine, until you rotate the screen. Nothing gets resized, and a black bar appears on the right side to fill in the gap (see screenshots). If I remove height=device-height completely, the problem goes away. However, I do need to use this parameter. Otherwise, I will have to ask a different question.
After rotating back to portrait mode, that black bar remains, and I can scroll left and right. This is a very strange issue. Removing width=device-width does something else unexpected. I have the code here if you would like to try it: http://toastd.net/viewport.html
Here are some screenshots:
Here it is working fine in portrait mode:
When rotated to landscape mode
Then rotated back into portrait mode
The meta tag will help define rules for the viewport but you still need to apply visual styling to address the change in orientation. Give these CSS values a try:
body { width: 100%; height: 100%; }
If you'd like a good resource to help continue your project, PhoneGap has a starter app on GitHub that you can fork.
PhoneGap Start
I believe this is a bug on Safari, but I figured out a way to work around it. It has to do with certain elements and their styles. By process of elimination, I narrowed it down to a few "offending" HTML elements. Deleting width: 100%; from some elements and CSS styles, as well as other static widths like width: 120px; would start to get reduce problem. I say "start to reduce", because the margin on the right became smaller, but didn't go away completely. I then started playing with other CSS attributes like margin and padding. After getting rid of some left and right padding from some elements, the problem finally went away. But this wasn't really acceptable, as those styles were there for a reason.
The solution was to wrap everything in a container element, size that appropriately, and set overflow: hidden; in CSS. Setting overflow: hidden; to the body or html tags would work too, but that did funky things with vertical scrolling in Mobile Safari. In my case, there was already such a container element, so all I had to do was add the overflow property to it.
Like I said, I think this is a bug in Safari. When you rotate from Landscape to Portrait, everything should be resized back to fit portrait mode. Visually, everything does look like it was resized properly. However, Safari must have thought something wasn't resized properly, so it displayed the page wider than it really was. This works just fine in Chrome on an Android device. I also added different background colors and borders to highlight which element might be causing the page to stretch beyond the width of the device screen. Visually, there was no apparent culprit.
If you're thinking it might be a width: 100% plus padding issue, I had the same thought. But then deleting either the width or the margin/padding alone should have fixed the issue, which it did not. Not a single element was sitting beyond the edge of the screen. There was nothing but empty space there.
Since a couple of weeks i'm building a new website. This website starts to look pretty good but there is one problem.
When i view my website in a browser window that is smaller than the actual webpage, the menubar on top of the page gets cut off. I can't scroll up and down the page, but the top part can't be reeched.
This problem probably has something to do with the 'center' code I use for center vertically. Is there an solution where i can keep my webpaged centered but still can reached the hole page once I'm using a small window?
I all ready solved the problem in Chrome mobile by using a 'viewport' metatag.
Sadly the desktop browsers like IE, safari, Chrome etc. still refuse to show the topbar of my webpage when the window is small.
Here is a link to my website:
test.themissingsticks.com
Try viewing it in a fullscrene window (with a resolution above 800px height) and view it with a window of less than 600px height. You will notice the gray menubar on the top of my website will not show, net even when you try to scroll upwards.
The website is centered by the following line of css:
top: 50%;
margin-top: -340px;
left: 50%;
margin-left: -513px;
width of the page is 1026px and height is 680px.
Please help. Thanks in advance!
go to style.csss
change css of "menutms"
replace margin-top: -340px; by margin-top: -300px;
it will work in all browser.
Found the answer! I made 2 div's for vertical and horizontal center alignment. These two are positioned absolutely. the rest of the hole webpage is positioned relatively inside these div's.
The only downside is that IE9 is not displaying the site very well.
Here's a disciption of the method:
http://www.search-this.com/2008/05/15/easy-vertical-centering-with-css/