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• CGRect in C code

  - by Leif Andersen

  A simple google search for: CGRect + C or CGRect in C brings back only Apple, iPhone, and Objective-C websites. However, I remember hearing that Core Graphics was part of C at my university. Did I hear incorrectly, or is CGRect something that I can use in C, or even C++ as it's Object oriented?

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• vector drawing canvas in GWT

  - by Limbic System

  Are there are decent implementations of a vector graphics canvas in GWT? I would like to be draw arbitrary shapes and have them react to user input (mouse in/out/click/etc). There are wrappers for the HTML canvas, but that feature is not supported in older browsers (read: IE).

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• UIImage change raw pixels from white to clear?

  - by christo16

  I've tried some code from each of these questions: How to make one color transparent on a UIImage? How to mask a UIImage so that white becomes transparent on iphone? but have come up unsuccessful, unfortunately working with Core Graphics and images is not my strong suit. How would I go about accessing a UIImage's raw data and changing the white pixels to clear? Thanks!

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• Delete rectangle using c#?

  - by C. Karunarathne

  Can I delete the old rectangle which I have drawn and draw a new rectangle? private void panel1_MouseClick(object sender, MouseEventArgs e) { Graphics g = this.panel1.CreateGraphics(); Pen pen = new Pen(Color.Black, 2); g.DrawRectangle(pen, 100,100, 100, 200); g.dispose(); }

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• Automatically charge PayPal account?

  - by Mark

  I'd like to automatically charge my members a variable amount of money based on the services they use on my website. They would accumulate a balance owing, and then every week they would be charged for that amount. Is there a way I can do this without having to store their credit card information in my database? (Similar to my last question, but I just realized I don't really want to go through the headaches and liability issues of having to safely store CC info)

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• ASP.NET/Vb.net: How to create a frame after an image is uploaded ?

  - by stighy

  Hi guys, i would like to create a fixed size frame for user photos uploaded. I've tought: i, can create a fixed sized image (200 width x 600 height for example), with my personal frame (top, left, bottom, right element graphics) , and in the center a transparency. Ok, but i don't know how to merge the photo into the frame and save the new photo format. Does anybody have some piece of code to help me ? Thank you!

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• Software to draw 3D geometry

  - by ilovekonoka

  Does anyone know any software that can draw 3D geometry like figures usually seen in computer graphics papers and articles(example: http://www.iquilezles.org/www/articles/sphereao/sphereao.htm)? I know it can be done in Inskcape or Illustrator but I'm not sure they're the only choices.

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• Delete rectangle using .NET?

  - by C. Karunarathne

  Can I delete the old rectangle which I have drawn and draw a new rectangle? private void panel1_MouseClick(object sender, MouseEventArgs e) { Graphics g = this.panel1.CreateGraphics(); Pen pen = new Pen(Color.Black, 2); g.DrawRectangle(pen, 100,100, 100, 200); g.dispose(); }

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• How to backup database file to sdcard on android?

  - by CSharperWithJava

  I'd like to add a feature to my android app that automatically backs up the sqlite database to the sd card. What's the best way to go about this? Any examples/tutorials available?

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• smallest filesize for transparent single pixel image

  - by zaf

  I'm looking for the smallest (in terms of filesize) transparent 1 pixel image. Currently I have a gif of 49 bytes which seems to be the most popular. But I remember many years ago having one which was less than 40 bytes. Could have been 32 bytes. Can anyone do better? Graphics format is no concern as long as modern web browsers can display it and respect the transparency.

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• Is DxScene the "WPF for Delphi"? Anyone used it?

  - by André Mussche

  I am playing with DxScene and VxScene: http://www.ksdev.com/dxscene/index.html It looks very nice and powerful: 3d accelerated vector graphics, cross plaform, nice effects, many 2d GUI controls (vector based), good scaling, transparency, rotating (x, y, z), 3d models, etc. Even with many effects, the CPU stays very low (0%)! http://www.ksdev.com/dxscene/snapshot/screen0.jpeg But can it be seen as a good WPF alternative for Delphi? And does anyone use it instead of normal Delphi VCL?

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• Inset selection in gimp? Reverse drop-shadow?

  - by DevDevDev

  I'm wondering how to achieve this effect that Apple uses. It looks as though the button is depressed into the bar, can't figure out how to do the same effect for my graphics. Thanks!

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• XSL Transform SVG to VML

  - by kzh

  I don't know anything about VML except that Internet Explorer and other Microsoft products use it and that it is a vector graphics format. Can one use XSLT to transform an SVG document to VML? Or are they too different from one another to make this possible? I know that there exist XSLT documents to transform SVG to XAML.

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• Resized image degrades in quality.

  - by Venkats

  I resized an image using Java2D Graphics class. But it doesn't look right. BufferedImage resizedImage = new BufferedImage(IMG_WIDTH, IMG_HEIGHT, type); Graphics2D g = resizedImage.createGraphics(); g.drawImage(originalImage, 0, 0, IMG_WIDTH, IMG_HEIGHT, null); g.dispose(); Is it possible to scale an image without introducing artifacts?

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• Is there any way of an app in Linux have access to 2 network cards?

  - by fpinheiro

  My app needs to access two network cards. One to receive data (eth0) and another to send data (3G modem). Normally, the kernel force the app to work with only one card at a time. Is there any thing that I can do to make it run? Thank you.

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• Does the size of monitor Matters ?

  - by Arsheep

  I have a old computer , i want to buy a big LCD now the best i can found is Viewsonic's 24" lcd TFT monitor . So will it run without any problems or i need to upgrade the video cards or something too ? The computer is not that much old it has P4 bord and celeron processor with 128 graphics memory . And in properties it shows i can maximum use 1280 x 1024 resolution. I am noob hardware wise So need help on this stuff. Thanks

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• what are sparse voxel octrees?

  - by pdeva

  I have reading a lot about the potential use of sparse voxel octrees in future graphics engines. However I have been unable to find technical information on them. I understand what a voxel is, however I dont know what sparse voxel octrees are or how are they any more efficient than the polygonal techniques in use now. Could somebody explain or point me to an explanation for this?

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• How do I update the system wallpaper in an Android 1.6 service after changing it with setWallpaper()

  - by Majakk

  So basically the code "almost" works - the problem is that the system does not appear to know that the system wallpaper have been changed or does not do anything about it. Starting and closing another app manually appears to enforce an update. In an event call the following is done: getApplicationContext().setWallpaper(pWallOne); Is there some way of telling the android system to update the graphics or to do some cheap trick that forces it to? Any help or tip would be very much appreciated!!

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• Dynamically Rendering in a Scrollable Area

  - by James

  What is the generic algorithm or process that is commonly used to dynamically render portions of a scrolling area? For example, in Google Maps, when the user scrolls past the bounds of the currently rendered area, a grey checkerboard pattern is displayed within the not-yet-rendered portions while the application loads and renders those areas. I'm looking specifically for the approach, or the mathematics, related to filling a graphics area in chunks based on what has just come into view. If possible, I'm looking for anything relevant to the GDI+ process of doing so.

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• How to draw a line with an arrow head?

  - by Rose

  I need to draw a line with an arrow head. How can i do this using Core graphics. Any help!!!

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• Are border lines in the Flash drawing API drawn inside or outside a shape?

  - by Hanno Fietz

  When I draw rectangles etc in ActionScript, using the Flash Player's drawing API (i. e. the Graphics class), is the border line of that shape drawn on the outside or the inside of the shape? I. e., which of the following diagrams correctly depicts a rectangle drawn a the border of a content area in a custom component?

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• Dynamicall Rendering in a Scrollable Area

  - by James

  What is the generic algorithm or process that is commonly used to dynamically render portions of a scrolling area? For example, in Google Maps, when the user scrolls past the bounds of the currently rendered area, a grey checkerboard pattern is displayed within the not-yet-rendered portions while the application loads and renders those areas. I'm looking specifically for the approach, or the mathematics, related to filling a graphics area in chunks based on what has just come into view. If possible, I'm looking for anything relevant to the GDI+ process of doing so.

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• How to prevent overdrawing?

  - by afriza

  This is a difficult question to search in Google since it has other meaning in finance. Of course, what I mean here is "Drawing" as in .. computer graphics.. not money.. I am interested in preventing overdrawing for both 3D Drawing and 2D Drawing. (should I make them into two different questions?)

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• How to blit() in android?

  - by Lo'oris

  I'm used to handle graphics with old-school libraries (allegro, GD, pygame), where if I want to copy a part of a bitmap into another... I just use blit. I'm trying to figure out how to do that in android, and I got very confused. So... we have these Canvas that are write-only, and Bitmaps that are read-only? It seems too stupid to be real, there must be something I'm missing, but I really can't figure it out.

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• ActionScript Drawing Rect Of 2 Or More Colors?

  - by TheDarkIn1978

  what's the easiest way to draw a rect with 2 ore more colors? the graphics class beginFill() method only takes one color, but is there a simple way to specify 2 ore more evenly distributed colors without having the colors gradate?

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