screenshot

问题 I would like to create dynamic images from html that I'm generating on website. I have code that generates a PSN Trophy Card, ab Xbox LIVE Gamer Card, a Steam Gamer Card, and an Xfire Gamer Card. Each card is put into its own div and built dynamically from server side code. Is there a way to capture a screenshot of a selected div on a webpage using C# and ASP.NET? 回答1: If you need to take a screenshot you will need to do so client side. So you will need to do so using some client side

问题 I have been using the Windows API's BitBlt function to perform the screen grab. There are many drawbacks however: DWM and Aero cause a massive slowdown (3ms --> 35ms just to call BitBlt ) -- to work around this would require disabling Aero which I'd just rather not do. The screen flickers and things shift around. Data must be re-transferred to the GPU in order to load data as texture Layered Windows cannot be captured without CAPTUREBLT flag. When enabled, the mouse cursor blinks when

问题 Using html2canvas how can I save a screen shot to an object? I've been exploring the demos, and see that the function to generate the screenshot is generated as follows: $(window).ready(function() { ('body').html2canvas(); }); What I've tried doing is $(window).ready(function() { canvasRecord = $('body').html2canvas(); dataURL = canvasRecord.toDataURL("image/png"); dataURL = dataURL.replace(/^data:image\/(png|jpg);base64,/, ""); upload(dataURL); }); And, I then pass it to my upload() function

问题 I have form in which background is transparent. I have a button on the form. When I click the button, screenshot of the transparent area is taken and the screenshot is analyzed for a certain reference-image, and if the image is found, a rectangle should be drawn around the reference-image. For now nothing happens when I press the button. I'm using BotSuite Dll, provided here: http://www.botsuite.net/. I My code for the button click is as follows: private void button1_Click(object sender,

问题 In my iOS app I need either prevent the screenshot capture (by pressing combination of Home +Power button), or need to detect before it saved to the Photo library . In previous iOS version before taking screenshot touchesCancelled:withEvent this method will called , but iOS7 onwards this wont work. Apple provide a notification UIApplicationUserDidTakeScreenshotNotification for detecting screenshot capture .The real problem is this will fire only after the screenshot is saved in Photo library

问题 Why would does this work on simulator but not on a device. I am trying to capture a screenshot of a view that contains more than one AVPlayer.I can snap a frame from a player, but I need the actual screenshot as the view contains a few players, in specific locations on the screen at once. There are multiple threads regarding this topic, but I am yet to find an answer. - (UIImage *) takeScreenShot { UIImage *image; CGSize snapArea = self.view.bounds.size; int bottomTobBarHeight = 44; snapArea

问题 So basically I was messing about with LWJGL for a while now, and I came to a sudden stop with with annoyances surrounding glReadPixels() . And why it will only read from left-bottom -> top-right. So I am here to answer my own question since I figured all this stuff out, And I am hoping my discoveries might be of some use to someone else. As a side-note I am using: glOrtho(0, WIDTH, 0 , HEIGHT, 1, -1); 回答1: So here it is my screen-capture code which can be implemented in any LWJGL application

问题 I want to capture a screenshot of a playing video in xcode. How can I do it programmatically? I found a screenshot method in apple document as following. The method works fine if I just want to take a screenshot of a view. However, it fails to work with a playing video. - (UIImage*)screenshot { // Create a graphics context with the target size // On iOS 4 and later, use UIGraphicsBeginImageContextWithOptions to take the scale into consideration // On iOS prior to 4, fall back to use

问题 I want to capture a screenshot of a playing video in xcode. How can I do it programmatically? I found a screenshot method in apple document as following. The method works fine if I just want to take a screenshot of a view. However, it fails to work with a playing video. - (UIImage*)screenshot { // Create a graphics context with the target size // On iOS 4 and later, use UIGraphicsBeginImageContextWithOptions to take the scale into consideration // On iOS prior to 4, fall back to use

问题 I want to convert textView into Bitmap but I am getting blackscreen Instead of the data inside textview. Screen I want to convert Screen which I am getting after drawing cache I don't know where I am going wrong. Following is my code abc.xml <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android