draw

Is it possible for me to draw ABOVE all controls on a form ? I have some controls ( textboxes , buttons , COM objects ) on my form, and I wish to draw ON them, overriding any pixels previously drawn by them. I am using Windows Forms on C# . NOTE: the Graphics class draws under the controls... Take a look at the code in this article: Draw Over WinForms Controls The author has created a component that (as he describes it) is like a piece of glass over your form. Your code then draws on this 'glass,' over controls, the form it overlays, etc. One serious limitation which will affect you is that it

if i draw my image I fixed the problem use CGAffintrasform CGAffineTransform myTr = CGAffineTransformMake(1, 0, 0, -1, 0, backImage.size.height); CGContextConcatCTM(context, myTr); [backImage drawInRect:CGRectMake(cbx, -cby, backImage.size.width, backImage.size.height)]; myTr = CGAffineTransformMake(1, 0, 0, -1, 0, backImage.size.height); CGContextConcatCTM(context, myTr); when i wanna write to file i use this NSData *imageData = UIImageJPEGRepresentation(backImage, 0); then Image upside down how ? When you want to get a UIImage to save, use: UIGraphicsBeginImageContextWithOptions(size,

The target language is C/C++ and the program has only to work on Linux, but platform independent solutions are preferred obviously. I run Xorg, XVideo and OpenGL are available. How many FPS can I expect on 1024x768 on an Intel Core 2 Duo with Intel graphics? (ONLY drawing counts, consider the arrays to be ready in RAM; no precise prognosis needed) The fastest way to draw a 2D array of color triplets: Use float ( not byte, not double) storage. Each triplet consists of 3 floats from 0.0 to 1.0 each. This is the format implemented most optimally by GPUs (but use greyscale GL_LUMINANCE storage

Currently, I am using a convex hull algorithm to get the outer most points from a set of points randomly placed. What I aim to do is draw a polygon from the set of points returned by the convex hull however, when I try to draw the polygon it looks quite strange. My question, how do I order the points so the polygon draws correctly? Thanks. EDIT: Also, I have tried sorting using orderby(...).ThenBy(...) and I cant seem to get it working. user1149913 Have you tried the gift wrapping algorithm ( http://en.wikipedia.org/wiki/Gift_wrapping_algorithm )? This should return points in the correct order

Based on my previous question of " How to create a BottomBar as StickyBottomCaptureLayout in camera2 Android api? ", I created a layout with a StickyBar (SB) which is always locked above/near the system bar. I set the default positions and coordinates of the SB and the other layout in onLayout() (exactly as my answer ). The upper layout is a simple custom DrawView which has an ArrayList of Path s drew by the user. When the device rotates, it recalls onDraw() and calls several times canvas.drawPath() . However, the Path s are redrew with the same coordinates as before but on a different

I'm implementing a fairly standard app with the Android sdk that involves drawing using the SurfaceView, SurfaceHolder, Callback setup. In my main thread (UI thread) I have no drawing or handling of the SurfaceHolder (or the canvas you retrieve with it). In a separate thread I have the following: Log.i("GAME.DrawThread", "run()"); Log.i("GAME.DrawThread", Thread.currentThread().getName()); Canvas canvas = null; try { canvas = holder.lockCanvas(); synchronized(holder) { Log.i("GAME", "draw():synchronized"); Paint paint = new Paint(); paint.setColor(R.color.draw_color); canvas.drawColor(R.color