What is a swap chain?

The

swap string is a number of frames or locations in the computer memory that are used to portray the image before displaying it on a real monitor or other device. There are always at least two frames in the swap chain, as the first or active buffer is usually identified as the one that is currently displaying on the display. While one frame is displayed, the other buffer can be rendered and ready for the display and then replaced as needed. The use of a swap string can eliminate some problems that occur as a result of conflicts between hardware and software, as well as graphic artifacts that may occur directly to the display device.

The way the image is displayed on the monitor anything in this area of ​​memory is drawn on the screen several times every second. The screen is drawn by horizontal lines from the upper left corner of the lower right corner. The moment the screen begins another frame when moving from PRThe lower corner of the screen to the upper left corner is called vertical repetitions.

Draw the swap buffer implementation only on the screen during the vertical repetition. If this timing is off, or if the program is trying to draw on the screen during the period when the frame is portrayed, graphic anomaly known as a tear may appear. This happens when the image in the display of the display device suddenly changes in the middle of the rendering, causing one side of the display to display the latest frame and display the rest of the screen.

by rendering the scene in advance to the frame, another image to display, is already ready and can be quickly pushed into the display memory, so it is displayed. While one image is displayed, the other is drawn by the inviative frame, also called the rear buffer. This creates smooth animations and visual effects that can be exactly on timethe bathtubs to avoid tearing.

The term 'swap string' is more often known as double buffer or triple leveling, depending on the number of images drawn before the active framework. The use of algorithms of nanosecond or milliseconds is an essential part of the use of a swap chain to ensure that the maximum exceeding the monitor has not exceeded and that programs can pace their own processing and resources in the system. Using a swap chain, if properly implemented, can result in smooth animation regardless of the properties of the imaging device or up to the time required to render one animation frame.