Convert TGA to ICO
About TGA
Truevision TGA (Targa) is a raster graphics format that was originally designed for use with high-end graphics cards. It's a relatively simple format that supports both uncompressed and losslessly compressed data. Its most enduring use case is in the video game industry, where it's often used for textures and other game assets, largely because of its robust support for an 8-bit alpha channel (for transparency).
About ICO
The ICO (Icon) file format is used for computer icons in Microsoft Windows. An ICO file contains one or more small images at multiple sizes and color depths, allowing them to be scaled appropriately. The most common use for ICO files on the web is for 'favicons', the small icon displayed in a browser's tab.
TGA vs ICO
| Feature | TGA | ICO |
|---|---|---|
| Compression | uncompressed or RLE | uncompressed or PNG compressed |
| Transparency | true | true |
| Animation | false | false |
| Quality Rating | 3 | 3 |
| Patent Status | royalty-free | royalty-free |
| Year Introduced | 1984 | 1985 |
| Developed By | Truevision Inc. | Microsoft |
Frequently Asked Questions
Is TGA still relevant?
TGA is a legacy format and is not used for general-purpose imaging or web graphics. Its relevance is mostly confined to specific workflows in older video games and 3D modeling applications. For new projects, formats like PNG or TIFF generally offer more features and better compression.
What is an alpha channel?
An alpha channel is an extra channel of data in an image that defines transparency. A standard RGB image has three channels (Red, Green, Blue). An RGBA image adds a fourth 'Alpha' channel. The TGA format was one of the first to widely support a full 8-bit alpha channel, which was very useful for compositing images and creating game graphics.
Can I use a PNG for a favicon instead of an ICO?
Yes, modern browsers have excellent support for using PNG files as favicons. You can simply link to a .png file in your HTML header. However, the .ico format can still be useful as it can contain multiple icon sizes in a single file, which some browsers and platforms use in different contexts (like bookmarks or desktop shortcuts).
What's the maximum size for an ICO file?
While historically icons were very small (16x16 or 32x32 pixels), the ICO format can technically support icons up to 256x256 pixels. This allows for high-resolution icons on modern displays.
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