TTheĭXT1 format is mainly suitable for unlucented maps or alpha-only maps (not fully transparent or completely opaque), and for maps in full RGB565 format, DXT1 has a compression ratio of 4:1, i.e.

Among them, D3DFMT_DXT1 support 15-bit RGB and 1-bit alpha graphics formats, D3DFMT_DXT2, D3DFMT_DXT3 support 12-bit RGB and 4-bit alpha, D3DFMT_DXT4, D3DFMT_DXT5 are linear interpolation to generate alpha. Direct3D offers D3DFMT_DXT1 to D3DFMT_DXT5 in a total of 5 compressed texture formats. Even if you don't use DXT surface rendering directly, you can save disk space by creating textures in the DXT format. DXT is a DirectDraw surface that stores graphical data in compressed form, saving a lot of system bandwidth and memory. In DirectX, a texture compression technique called DXT is currently supported by most graphics cards, and through the understanding of DXT, we can see the leopard in the texture compression technology tube. So texture compression techniques are being used on all platforms to give texture maps as much balance as possible in terms of memory footprint and display. We know that the most important performance of 3D surface details in the game is achieved by mapping, then the higher the resolution, the more true color map natural expression is also stronger, but at the same time the problem is that the required memory will be multiplied, and memory savings in the current game is very important.

Gamebryo engine performance save