Hi guys; I am trying to draw individual pixels in xcode to be outputted to the iphone. I do not know any OpenGL or Quartz coding but I do know a bit about Core Graphics. I was thinking about drawing small rectangles with width and height of one, but do not know how to implement this into code and how to get this to show in the view. Any...
If I have distance in pixel using this formula: sqrt((x1-x2).^2+.(y1-y2)^2)) How can I converted it to CM? ...
Hey, I would like java to scan screen for particular color. Any ideas if how to do that? Thanks ...
My mac laptop has 1,024,000 pixels. What's the simplest way to turn my display completely black and go nuts with writing little programs to twiddle pixels to my heart's delight? To make it more concrete, say I wanted to implement the Chaos Game to draw a Sierpinski triangle, at the pixel level, with nothing else on the screen. What are ...
Hi; I'm using -setNeedsDisplayinRect to update only a part of my UIView. However, all of my drawing done previously to calling this method is erased. Here is my code in the UIView subclass: -(void)drawRect:(CGRect)rect{ CGContextRef context = UIGraphicsGetCurrentContext(); CGContextSetRGBFillColor(context, r, g, b, 1); ...
I need a fast command line app to return the color of the pixel under the mouse cursor. How can I build this in VC++, I need something similar to this, but ideally not in .NET so it can be run many times per second? ...
If I have an array of pixel data in JavaScript, is there a good way to display it on an HTML page? On recent versions of Safari and Firefox, I can make a <canvas> element and use putImageData to display the pixels, but ideally a solution could work on older versions as well and more importantly, work on Internet Explorer. Another solut...
What's the easiest way to tell the number of bits per pixel in a bitmap, e.g. a Windows .bmp file? ...
I know that there are people out there creating classes for this (ie http://coreyoneil.com/portfolio/index.php?project=5). But I want to learn how to do it myself so I can create everything I need the way I need. I've read about BitMap and BitMapData. I should be able to .draw the MovieClips onto a BitMap so I could then cycle the pixel...
My question is similar to this one. However, the answer in that thread does not work for me, because I'm using the LinearGradientBrush for an opacity mask. I've got a grid with three rows: <Grid.RowDefinitions> <RowDefinition Height="50" /> <RowDefinition Height="*" /> <RowDefinition Height="50" /> </Grid.RowDefinitions> ...
How can I get the RGB value of a particular pixel in a UIImage? ...
How can I change the color of an individual pixel programmatically in the iPhone sdk? ...
Hello, I am working on a little side project (program for Android platform)and I don't exactly have a problem, but I don't really know where to start. The project I am working on has to do with getting the info and manipulating a pixel's RGB values inside an image. I know this is a very basic program (not going to disclose all the info...
Hi everyone, I have a "Welcome Screen" which is made by hand from the entry point. On the other side, I have Widget named Main which uses the Singleton pattern: this Widget encapsulates the application funcionality and there should be only one instance in the application. This Widget is a composite over a DockLayoutPanel, which has nor...
I have to create a simple 2D animation without using various primitives for drawing line, circle etc for the purpose. It has to be done by manipulating pixels and implementing one of the algorithms for drawing line, circle etc by coloring pixels. I thought of using Turbo C for the purpose, but I use ubuntu. So I tried using dosbox to in...
Ok, I'm trying to make a program that finds the position of a colored pixel within the desktop. To do this I make a screenshot of the desktop then go through the pixels and search for the one that has the matching RGB as i need. The only problem is that my program returs strange coordonates X,Y for the found pixel... #include <stdio.h> ...
Hello, I am working on a little side project (program for iPhone platform)and I don't exactly have a problem, but I don't really know where to start. The project I am working on has to do with getting the info and manipulating a pixel's RGB values inside an image. I know this is a very basic program , but I am a beginning iPhone program...
I'm using google maps in my application, and I have a webserver with a databse filled with lat/lon values. I want to mark them on the map, but I also want to cluster them together if they are within a certain pixel-distance of eachother. I figure if I retrieve all my points from the database, I should be able to do something like this (...
Ok so what I am trying to do is get an image from the camera roll, displaying it through the image view, and then getting some pixel data and modifying it (change brightness levels through the RGB values of the pixels). I'm a beginning dev and I can't seem to really get the hang of CGImage to actually get the pixel data. Could anyone hel...
I have been wondering for quite some time if there is a way to find the locations of all the pixels that match a certain pixel set in a UIImage. What I have so far is a simple code to find the RGB8 values for the pixel I have selected: - (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event { UITouch *touch = [touches anyOb...