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  • SDL_BlitSurface() not displaying image?

    - by Christian Gonzalez
    So I'm trying to display a simply image with the SDL library, but when I use the function SDL_BlitSurface() nothing happens, and all I get is a black screen. I should also note that I have the .bmp file, the source, and the executable file all in the same directory. //SDL Header #include "SDL/SDL.h" int main(int argc, char* args[]) { //Starts SDL SDL_Init(SDL_INIT_EVERYTHING); //SDL Surfaces are images that are going to be displayed. SDL_Surface* Hello = NULL; SDL_Surface* Screen = NULL; //Sets the size of the window (Length, Height, Color(bits), Sets the Surface in Software Memory) Screen = SDL_SetVideoMode(640, 480, 32, SDL_SWSURFACE); //Loads a .bmp image Hello = SDL_LoadBMP("Hello.bmp"); //Applies the loaded image to the screen SDL_BlitSurface(Hello, NULL, Screen, NULL); //Update Screen SDL_Flip(Screen); //Pause SDL_Delay(2000); //Deletes the loaded image from memory SDL_FreeSurface(Hello); //Quits SDL SDL_Quit(); return 0; }

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  • Swapping an image during web development

    - by detly
    I'm trying to see what a certain webpage would look like if I replaced a certain image with another. Rather than upload the image, edit the site, etc, each time I tweak it, I'd like to know if there's a way to change the image in the page to my local version while viewing the remote page. I use Firebug for debugging web development usually, but I'm open to any other tool that might do this. (It is absolutely impossible to search for this and find anything but questions about dynamic image swapping on a deployed website, so sorry if this is a duplicate.)

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  • Rotate a feature Image in Open Layers

    - by Ozaki
    I have an open layers map. It adds and removes my "imageFeature" every 10secs or so. I have a JSON feed that gives me the rotation that I need, I have a request to get that rotation and set it as a variable of rotationv. Everything works but the fact when the image is recreated it does not update the rotation. My code is as follows: JSON request: var rotationv = (function () { rotationv = null; $.ajax({ 'async': false, 'global': true, 'url': urldefault, 'dataType': "json", 'success': function (data) { rotationv = data.rotation; } }); return rotationv })(); Creating image feature: imageFeature = new OpenLayers.Feature.Vector( new OpenLayers.Geometry.Point(mylon, mylat), { rotation: rotationv } ); The image is set in the styling elsewhere. Why does this not rotate my image?

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  • MPMoviePlayerController not setting the bounds for background image

    - by VXtreme
    I am using MPMoviePlayerController for playing the media . I want to set the image at the background of the player.The image is set accordingly but when i set the bounds for the image then the image is not set according to bounds . I have tried following code: UIImageView *imageView=[[UIImageView alloc]initWithImage:[operationControl getCoverImage:stringId]]; imageView.bounds=CGRectMake(0, 100, 200, 200); [moviePlayer.backgroundView addSubview:imageView]; [moviePlayer.backgroundView setBackgroundColor:[UIColor purpleColor]]; moviePlayer.controlStyle = MPMovieControlStyleDefault; moviePlayer.shouldAutoplay = YES; [moviePlayer setScalingMode:MPMovieScalingModeAspectFit]; [self.view addSubview:moviePlayer.view]; [moviePlayer setFullscreen:YES animated:YES];

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  • How to recreate the UITabBarItem image filter?

    - by boliva
    Hi, I'm writing a custom UITabBar replacement, and I would like to know how to recreate the filter that the built-in implementation does with the UITabBarItem image - that blue shining on selected tabs and gray gradient on unselected ones. I guess it's a matter of using the source image alpha value as a mask and overlay it with a pre-made blue (or whatever color) shining image and another one grayed out, but I would like to know what is the best approach from a code point of view. Best,

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  • Using an image file vs data URI in the CSS

    - by fudgey
    I'm trying to decide the best way to include an image that is required for a script I've written. I discovered this site and it made me think about trying this method to include the image as a data URI since it was so small - it's a 1x1 pixel 50% opacity png file (used for a background) - it ends up at 2,792 bytes as an image versus 3,746 bytes as text in the CSS. So would this be considered good practice, or would it just clutter up the CSS unnecessarily?

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  • glReadPixels and save to image

    - by Julius Petraška
    I have app, where user drags and drops image, and it is being redrawn with OpenGL for some aviable processing. Everything works. And when user wants to save his image it works like that: glReadPixels -> NSBitmapImageRep -> NSData -> Write to file This works too. Almost. With some images it is not working as it should work. For example: .png when I open and save this image: I get: And if I open and save this image: I get: .jpg If I open and save: I get: And when I open and save: I get: So sometimes images saves badly. Why is it happening?

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  • Image overlapping in widget

    - by Hunt
    I am trying to create a widget in android in which when I click over image the image gets changed with a new one -- kind of toggle image. But when I click over it, the image overwrites over the old one rather then replacing the new one. I don't know whether this is the way the widget works or am I doing something wrong. My images are semi-transparent so in case one overrides another one can see the image which is being overlapped. This is the code that I have written in OnReceive by overriding it: @Override public void onReceive(Context context, Intent intent){ if (intent.getAction().equals(iAlertConstant.ACTION_WIDGET_UPDATE_FROM_WIDGET)) { RemoteViews remoteViews = new RemoteViews(context.getPackageName(),R.layout.mywidget); remoteViews.setImageViewResource(R.id.btnOnOff,R.drawable.offbtn); ComponentName thisWidget = new ComponentName(context, EmergencyWidget.class); AppWidgetManager.getInstance(context).updateAppWidget(thisWidget, remoteViews); } else super.onReceive(context, intent); } Layout <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:background="@drawable/widget_background" android:paddingLeft="10.0dip" android:paddingTop="8.0dip" android:paddingRight="10.0dip" android:paddingBottom="8.0dip" android:layout_width="fill_parent" android:layout_height="72dp" android:layout_marginLeft="10.0dip" android:layout_marginTop="10.0dip" android:layout_marginRight="10.0dip" android:id="@+id/emergencyWidget" android:orientation="horizontal"> <ImageView android:background="@drawable/offbtn" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginTop="7dp" android:layout_marginLeft="4dp" android:layout_marginRight="4dp" android:layout_gravity="right" android:id="@+id/btnOnOff" /> </LinearLayout>

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  • image upload on server

    - by user338322
    I am trying to upload an image to server using iphone . I haven't done it before. But I am not getting how can i do it. I know how to add text data on server. But how to add the image data or an Image to server . Can any one suggest!?

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  • How do you make an image opened in colorbox scrollable

    - by nicholas.alipaz
    I would like my images that I open in colorbox to be displayed fullsize with no resizing applied to them and then apply scrollbars to allow for viewing the larger images. Some of my images are quite tall and things get pixelated when resized down. Currently colorbox just resizes my images down to the size of the available height/width. Is there a way to make all images display fullsize with overflow scrollable in colorbox? I am linking directly to an image: <a href="/myimage.png" title="My Image" class="colorbox imagefield imagefield-imagelink imagefield-field_portfolio_screenshot initColorbox-processed cboxElement" rel="gallery-12"> <img src="/thumb/myimage.png" alt="image" title="My Image" class="imagecache imagecache-portfolio_screenshot_thumb" height="50" width="50"> </a>

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  • How to get ROI of an image in Android

    - by uday
    Hi All, I have an image file (.jpg) which contains image like Face. From my application i want to capture that particular Face part and copy that part into a new bitmap file. I have a rectangular co-ordinates of that Face part, so how do i capture only Face part from the image file and copy that into a bitmap file?? Could any body help me to get rid of this problem.... Thanks & Regards Uday Kiran

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  • Setting String as Image Source in C#

    - by Dan
    UPDATE: Okay I've changed my code to this: if (appSettings.Contains("image")) { Uri uri = new Uri( (string)appSettings["image"] + ".jpg", UriKind.Absolute); ImageSource imgSource = new BitmapImage(uri); myImage.Source = imgSource; } else { Uri uriDefault = new Uri("default.jpg", UriKind.Absolute); ImageSource imgSourceDefault = new BitmapImage(uriDefault); myImage.Source = imgSourceDefault; } But now I get "Invalid URI: The format of the URI could not be determined". Well I've looked up several methods to fix this in my Windows Phone 7 app but I can't seem to find anything that works. What confuses me is that I've done something just like this before with no problem, so I'm not sure why it's not working. The code causing me the problem is this: if (appSettings.Contains("image")) { myImage.Source = (string)appSettings["image"]; } else { myImage.Source = "default.jpg"; } The error I get is this "Cannot implicitly convert type 'string' to 'System.Windows.Media.ImageSource". The reason this confuses me is because I did this Twitter app tutorial: http://weblogs.asp.net/scottgu/archive/2010/03/18/building-a-windows-phone-7-twitter-application-using-silverlight.aspx , in which you bind the image source directly to a string. So what can I do to remedy this?

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  • wicket: how to add table background image

    - by vivmal
    Hi All Can anyone please tell me how to add table background image in wicket. Actually I've tried a lot like <table background="images/logo.jpg"> also <style>table {background-image: url('images/logo.jpg')}</style> also <table style="background-image: url('images/logo.jpg')"> But nothing works. Please help. Thanks in advance.

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  • retrieve image from sql server in picturebox

    - by user3116296
    I have saved a picture in sql server and now i can not to retrieve image and set it's in picturebox with linq. why byte[] x become null? private void dataGridViewUser_CellClick(object sender, DataGridViewCellEventArgs e) { DataGridViewRow row = dataGridViewUser.CurrentRow; byte[] x=(byte[])row.Cells["Image"].Value; MemoryStream ms1 = new MemoryStream(x); picuser.Image = Bitmap.FromStream(ms1); }

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  • In Javascript, by what mechanism does setting an Image src property trigger an image load?

    - by brainjam
    One of the things you learn early on when manipulating a DOM using Javascript is the following pattern: var img = new Image(); // Create new Image object img.onload = function(){ // execute drawImage statements here } img.src = 'myImage.png'; // Set source path As far as I know, in general when you set an object property there are no side effects. So what is the mechanism for triggering an image load? Is it just magic? Or can I use a similar mechanism to implement a class Foo that supports a parallel pattern? var foo = new Foo(); // Create new object foo.barchanged = function(){ // execute something after side effect has completed } foo.bar = 'whatever'; // Assign something to 'bar' property I'm vaguely aware of Javascript getters and setters. Is this how Image.src triggers a load?

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  • How to make a jquery datePicker button image unclickable

    - by Farzana
    I have a jquery UI datePicker in my page. I have a text box on which the date is displayed. The code is: $("#cal").datepicker({ minDate: new Date(), defaultDate: new Date(), buttonImage: '/images/calendar.gif', constrainInput: false, closeText: 'Close', showButtonPanel: true, showButtonText: 'Choose a date', buttonImageOnly : true, showOn : 'button' }); $("#till").datepicker('setDate', today); I want to disable this on some conditions. I use the following code to disable: $("#cal").datePicker('disable'); It blacks out the text box but the image is still clickable. The problem is in IE, the date picker pop up comes up but does not close when the image button associated with the date picker is clicked. I also tried to bind a onclick function with the image to make it non-clickable. But that does not work as well. How can make the date picker image button non-clickable when the date picker is disabled. Any help would be appreciated. Thanks, Farzana

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  • add text to curved image

    - by miki123
    $config['source_image'] = '/path/to/image/mypic.jpg'; $config['wm_text'] = 'Copyright 2006 - John Doe'; $config['wm_type'] = 'text'; $config['wm_font_path'] = './system/fonts/texb.ttf'; $config['wm_font_size'] = '16'; $config['wm_font_color'] = 'ffffff'; $config['wm_vrt_alignment'] = 'bottom'; $config['wm_hor_alignment'] = 'center'; $config['wm_padding'] = '20'; $this->image_lib->initialize($config); $this->image_lib->watermark(); This is water mark code in php, it is working fine when we add text to curve image like mug image, the letter is not overlap the curved image how can we overcome?

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  • "painting" one array onto another using python / numpy

    - by Nate
    I'm writing a library to process gaze tracking in Python, and I'm rather new to the whole numpy / scipy world. Essentially, I'm looking to take an array of (x,y) values in time and "paint" some shape onto a canvas at those coordinates. For example, the shape might be a blurred circle. The operation I have in mind is more or less identical to using the paintbrush tool in Photoshop. I've got an interative algorithm that trims my "paintbrush" to be within the bounds of my image and adds each point to an accumulator image, but it's slow(!), and it seems like there's probably a fundamentally easier way to do this. Any pointers as to where to start looking?

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  • HOw to Extract image pixels and perform computation on it

    - by gavishna
    What i want to do is extract the pixels into array A(i,j).Let A(i,j) represent the pixel in the ith row & jth colm of the image. Let B(i,j) be the transformed array containing bits such that B(i,j) = 1 if (A(i,j)/2^t) mod 2 =1, where t=0,1,2,3,4,5,6,7 = 0 otherwise Then the array B(i,j) will be mutliplied by another array say C(i,j) representing another image. Then i want to plot the result of B*C as an image. How do i take in the pixels for the above conditions for both gray and RGB color format.Also how do i solve the above problem.Any helo will be usefull because i am not an expert in image processing.

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  • PHP - upload.class image and $_FILES

    - by Ockonal
    Hello, I'm using class.upload.php to upload pictures onto the server. Here is my form: <form action="<?="http://".$_SERVER['SERVER_NAME'].$_SERVER['REQUEST_URI'];?>" method="post" enctype="multipart/form-data"> <table style="width: 100%; padding-top: 20px;"> <tr> <td>Image file:</td> <td><input type="file" name="image_file" /></td> </tr> <tr> <td>&nbsp;</td> <td align="right"><input type="submit" name="add_new" value="Add image" /><td></td> </tr> </table> </form> In php code I do: if( array_key_exists('add_new', $_POST) ) { echo 'add new is in array'; echo '<pre>'; print_r($_POST); print_r($_FILES); echo '</pre>'; $handle = new Upload($_FILES['image_file']); ... } Here is an output of print_r: Array ( [image_file] => somefile.png [add_new] => Add image ) Array ( ) As you can see second array is empty ($_FILES), so image doesn't upload. Why? operating system : Linux PHP version : 5.2.12 GD version : 2.0.34 supported image types : png jpg gif bmp open_basedir : /home/httpd/vhosts/kz-gbi.ru/httpdocs:/tmp

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  • UIImageView Centering Problem.

    - by sagar
    To understand my problem let's follow this steps. Open - XCode - New Project - View based application. Open View Controller.xib file. Drag an image-view into viewController's view. Place that image view on center of viewController's view. Apply size of 125x125 to image-view. Take any image with dimension of 320 width & 460 height. Drag that image into your application resources directory. Now, Again back to .xib File & select image-view Set image (which is in your resources) to image-view Set Image-view Mode to - Center Ok. Let me explain the situation now. after performing all above steps - image-view has an image which is larger than image-view's size. However, Image-view places that image on center & in View controller image-view is looking proper ( not scaled ). But When you run your application, image-view will be displayed in size of 320x460. ( but it is not actually scaled. ) Now, I can't find the reason, why interface builder is displaying something else & simulator/iphone is displaying something else ? My Query. I want the image's center portion within image-view no matter what image size is. Thanks in advance for sharing your knowledge. Sagar.

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