Pixel Pursuit Mac OS

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A minimalist and very easy to use Mac OS X application designed to help you detect dead pixels on LCD displays by covering your screen with various patterns.

What's new in Pixel Tester 8.1:

• A full recompilation has been made to be compatible with High Sierra, and as Universal Binary to keep being compatible with both old (PowerPC) Macs and recent (Intel) Macs.
• The 'How to intall it?' paragraph of the documentation has been updated to explain how to install and launch the Application in particular under Mac OS 10.13 High Sierra:
• Under Mac OS 10.13 High Sierra, if you're launching the Application for the first time, Mac OS' GateKeeper (which you can configure in the 'System Preferences') will refuse to launch it because you've not downloaded it from the Mac App Store (but from our website). In this case, instead of double-clicking on it, all you have to do is to right-click on the Application's icon, and then select the 'Open' menu. A message will appear in which you'll be able to confirm that you want to launch the Application (even if it was not downloaded from the Mac App Store from an Identified Developer).

Some LCD displays present dead pixels which, depending on the manufacturer policy regarding faulty pixels, can be a reason to ask for a replacement.

Pixel Tester is a simple Mac app that allows you to quickly test all connected displays, in order to identify pixels that do not work properly.

Effortless to use software solutions for instantly identifying dead screen pixels

The Pixel Tester application comes with a streamlined workflow that makes the testing process extremely easy. Start by selecting the display you want to test, and then move your cursor around to change the pattern displayed on the screen.

Depending on the display area in which you place the mouse, Pixel Tester shows different colors and patterns: pure red / blue / green when the pointer is in the bottom screen area, and pure white for the top of the screen.

Features multiple test patterns for your screen and can work with multiple displays

To make sure you are able to identify all dead pixels, Pixel Tester comes packed with a collection of patterns designed to make them visible.

Moreover, you have the opportunity to test various displays with minimal effort: the app recognizes all connected devices and allows you to choose the one on which you want to perform the test.

User friendly display testing utility featuring simple tools for visualizing dead pixels

Pixel Tester offers you the possibility to quickly identify dead pixels present on your screen with minimal effort: all you have to do is launch the application and move the mouse pointer to quickly switch between various patterns designed to cover your entire screen. Since the patterns have a special design, you will instantly be able to quickly see if there are any issues.

Filed under

Download Hubs

Pixel Tester is part of these download collections: Detect Dead Pixels

• As long as you use Pixel Tester unregistered, this software works normally, but it has a time limit and annoying windows (Registration window, Popup windows).

Pixel Tester 8.1

runs on:

Mac OS X 10.0 or later (PPC & Intel)

file size:

5.6 MB

filename:

Pixel Tester.dmg

main category:

Utilities

developer:

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Question or issue on macOS:

I wish I would find an answer for this. I have searched and searched and couldn't the right answer. Here is my situation:

In a Mac OS Cocoa Application, I want to draw a pixel (actually a few pixels) onto a dedicated area on my application window. I figured, it would be nicer to have a NSImageView placed there (I did so with IB and connected the outlet to my app delegate) and draw on that instead of my NSWindow.

How in the world can I do that? Mac OS seems to offer NSBezierPath as the most basic drawing tool — is that true? This is completely shocking to me. I come from a long history of Windows programming and drawing a pixel onto a canvas is the most simple thing, typically.

I do not want to use OpenGL and I am not sure to what extent Quartz is involved in this.

All I want is some help on how I can pull off this pseudocode in real Objective-C/Cocoa:

I would love to hear your answers on this and I am sure this will help a lot of people starting with Cocoa.

Thanks!

How to solve this problem?

Solution no. 1:

NSBezierPath is the only tool available in Cocoa for drawing most primitive shapes, and for many complex shapes.
Detail description you can find here:
http://developer.apple.com/library/mac/#documentation/Cocoa/Conceptual/CocoaDrawingGuide/Paths/Paths.html%23//apple_ref/doc/uid/TP40003290-CH206-BBCHFJJG
http://en.wikibooks.org/wiki/Programming_Mac_OS_X_with_Cocoa_for_Beginners/Graphics_-_Drawing_with_Quartz

Solution no. 2:

What you are asking for is either of these two methods:

NSBitmapRep setColor:atX:y: Changes the color of the pixel at the specified coordinates.

NSBitmapRep setPixel:atX:y: Sets the receiver's pixel at the specified coordinates to the specified raw pixel values.

Note that these aren't available on iOS. On iOS, it appears that the way to do this is to create a raw buffer of pixel data for a given colorspace (likely RGB), fill that with color data (write a little setPixel method to do this) and then call CGImageCreate() like so:

Lastly, you might be wanting to manipulate pixels in an image you've already loaded into a CGImage. There is sample code for doing that in an Apple Technical Q&A titled QA1509 Getting the pixel data from a CGImage object.

Solution no. 3:

Cocoa's low-level drawing API is Core Graphics (Quartz). You obtain a drawing context and issue commands to draw onto that context. The API is designed to be device-independent (you use the same commands to draw onto the screen as you would to draw onto paper, when printing). Therefore, there are no commands for filling in individual pixels, because there's no such thing as a pixel on paper. Even on the screen, your view may have been transformed in some way so that a single point doesn't map to a single device pixel.

If you want to draw a single pixel, you need to specify a rectangle that is the size of a single pixel, then fill it in. For the pixel at (x,y), you would want a rectangle with origin of (x-0.5,y-0.5) and a size of (1,1).

You can do that with NSBezierPath, or you can get a Core Graphics context (CGContextRef) from [[NSGraphicsContext currentContext] graphicsPort] and use functions like CGContextFillRect().

This obviously won't be very fast if you are drawing a lot of pixels; that's not what the API is designed for. If that's what you need to do, consider creating a buffer with malloc and writing your pixel data to that, then using Core Graphics to convert it into a CGImageRef, which can be drawn to the screen.

Solution no. 4:

For drawing pixels as you describe, there's no need to create a path or resort to the Quartz 2D or OpenGL API.

See NSRectFill() and related functions like NSRectFillList() and NSRectFillUsingOperation().

If you're drawing a lot of individual pixels, NSRectFillList() is about as fast as you can do it without resorting to rolling your own image buffers.

Solution no. 5:

Maybe I am misunderstanding the question, but Quartz has the ability to fill rectangles:

Solution no. 6:

Here's a quick way to draw pixels on OS X:

Solution no. 7:

I found your question here a bit late because I have the same problem. Perhaps Apples developer documentation can help you here. I have not tested it myself, but take a look at this document:

Pixel Os Pc

Roughly in the center of the document you will find the section 'Creating a Bitmap'. It tells you different ways of creating pixel data.

Solution no. 8:

Pixel Pursuit Mac Os Download

Hope this helps!