Are calls to Canvas.drawPath()/drawArc()/etc hardware accelerated, passed to a device native implementation or implemented in Java? Or is OpenGL the only way to achieve hardware accelerated drawing? I am trying to determine if it is feasible to use the Canvas API for realtime animation. ...
When is it necessary, or better to use a SurfaceView instead of a View? ...
Is it possible to draw curved lines in an HTML page (normally across cells in a table) using JavaScript (for web graph control)? ...
I'm building a Bitmap by layering images one above another, and when I'm done I want to write text around the edges. The top and bottom are simple because they're written horizontally, but I'd prefer to write the text on the left and right sides vertically so they don't take up as much space. The Graphics.DrawString method doesn't allow...
I have been looking all over the web for the simplest solution for this, and currently I have come across nothing that seems simple enough for my needs. I am looking for a way to manipulate a matrix of pixels manually in C++, platform independent. Does anyone know of a library that is simple to use that will help me obtain this? ...
Hello, I'm trying to paint a simple bar chart via C# but I've never experimented with the Graphics and Drawing namespaces. I thought of generating a "start" and "end" graphic and then repeating an image somehow (to show a "length") but I have no idea how to do this. I'd be really happy if you can point me in the right direction and/or ...
I have a question i know a line i just know its slope(m) and a point on it A(x,y) How can i calculate the points(actually two of them) on this line with a distance(d) from point A ??? I m asking this for finding intensity of pixels on a line that pass through A(x,y) with a distance .Distance in this case will be number of pixels. ...
I am calling repaint a bunch of times from a listeners, but the way I designed my paint function is only one repaint is required. I generate a bunch of repaints, since it hooked into my mouse motion listener. Is there a way to cancel all pending repaints for a certain component? I can't just start ignoring repaints, since some are val...
In c++ builder 6 on windows vista ... Graphics:: TBitmap * bmpscreencapture = new Graphics::TBitmap; bmpscreencapture-> Height = Screen-> Height; bmpscreencapture-> Width = Screen-> Width; HDC ScreenSrc = GetWindowDC (0); BitBlt (bmpscreencapture-> Canvas-> Handle, 0, 0, Screen-> Width, Screen-> Height, ScreenSrc, 0, 0, SRCCOPY); Canvas...
I have a polyline that approximates a curve, and I want to draw it as a smooth curve in PostScript, which supports Bezier curve drawing. To do that, I need to generate two control points between each pair of polyline points. (I can't get the original curve from the source, just the polyline.) I've had some success using cardinal spline...
I would like to change a 4x4 matrix from a right handed system where: x is left and right, y is front and back and z is up and down to a left-handed system where: x is left and right, z is front and back and y is up and down. For a vector it's easy, just swap the y and z values, but how do you do it for a matrix? ...
Hi I have a scan of a document (a form actually) filled with some handwritten infos. I have a bitmap of the form empty. how can i "cancel" the printed form to extract the handwritting only. I use C#... Thanks Jonathan ...
I know similar questions have been asked before, so don't get snarky and link to previous answers. The reason I am repeating this is that none of the answers have worked. I have a UIWebView, and I want to draw a pretty drop-shadow behind it. I have tried subclassing and using some CoreGraphics goodness in drawRect:, but to no avail. Can...
I am considering writing a 2D RTS in C#/.NET and i was wondering what options are available for a graphics library aside from XNA. What are they? ...
Our application draws drop shadows beneath thumbnails. It does this by creating a bitmap, getting a Graphics object using Graphics.FromImage, and then overlaying images using Graphics.DrawImage. I'm using it today for the first time over remote desktop, and it looks awful, because the shadows are being dithered. I don't know whether t...
Hi, Does somebody know the algorithm that is been used to fill or draw a Path2D (GraphicsPath in .NET) object with a Graphics2D-object (Graphics in .NET). The algorithm isn't public in the Java-sources and .NET isn't public at all. I want to use it for some fast image-operations. Thnx ...
I have a few JPG Images. Some of them may have a black border on one or more sides, and I'd like to remove them. The black border may not go around the actual image - some may only have the border at the bottom (with the actual image at the top), while some could be centered (which means black borders on two sides, but not connected). Wo...
I am writing an imaging library (using the MIT licence) and would like to hook it up to a library that supports loading and saving of images in various file formats (bmp, png, jpg etc) I am aware of FreeImage, but it appears to use a GPL licence. Is there anything out there similar to FreeImage that uses MIT rather than GPL ? ...
I have been using a floodfill algorithm of the stack-based non-recursive variety and it seems to work perfectly except for one annoying situation: if use a line to cut an image in half and then floodfill one half, it floods the whole image! This only happens, however, when I do not put 'borders' around the image. If i draw a rectangle th...
I want to add graphics to a multiscaleimage. I use the project that Deep Zoom Composer auto generated when creating a multiscaleimage. Displaying the multiscaleimage from VS2008 works. I've tried this and added the graphics to the maincanvas, without any results: <Grid> <Canvas Name="maincanvas"/> <MultiScaleImage/> </Grid> Edit: W...