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This article mainly explains "what is the ico icon", interested friends may wish to have a look. The method introduced in this paper is simple, fast and practical. Let's let Xiaobian take you to learn "what ico icon is"!

Ico icon, a file with the extension·ico. In fact, dll and exe files can also be used as icon files. An icon is a computer graphic that has a clear reference meaning. The desktop icon is a software identifier, and the icon in the interface is a function identifier.

ico icon file introduction

Icons have a standard set of sizes and attribute formats, and are usually small size. Each icon contains multiple pictures of the same display, each with a different size and number of colors. An icon is a set of similar images, each in a different format. At this point the icon is three-dimensional. Icons also have another property: they contain transparent areas that reveal the desktop background beneath the icon. The structure of the icon is actually similar to McDonald's Big Mac.

An icon is actually a collection of images in different formats and contains certain transparent areas. Because of the diversity of computer operating systems and display devices, icon sizes need to have multiple formats.

ico icon icon knowledge

resolution

When the operating system displays an icon, it will select the image most suitable for the current display environment and state according to certain criteria. If you are running Windows 98 and the display environment is 800 x 600 resolution and 32-bit color depth, the image format of each icon you see on your desktop is 256 colors and 32 x 32 pixels. Under the same display environment, the image format of these icons in Windows XP operating system is: true color (32-bit color depth), 32 x 32 pixel size. The following is the standard icon format across Windows operating systems: (Size Pixels-Color)

Windows98SE/ME/2000

48x48-25632x32-25616x16-256

48x48-1632x32-1616x16-16

WindowsXP

48x48-32bit32x32-32bit24x24-32bit*16x16-32bit

48x48-25632x32-25624x24-256*16x16-256

48x48-1632x32-1624x24-16*16x16-16

* This format is not required in XP icons.

Note: Windows 98/2000 is incompatible with icons in 24x24 format. You can open an icon containing this image format in the relevant application software, but the operating system considers it invalid. You must make sure that your icons contain at least the image formats listed above to get a good display. If the operating system cannot find a particular image format in the icon, it always displays it in the closest image format, such as reducing the icon size from 48 x 48 to 24 x 24 pixels. Of course, the effect is worse.

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