DXT5 to PTIF

Convert DXT5 to PTIF (Fast & Free)

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How to convert DXT5 to PTIF ?

  1. Select DXT5 files you want to convert, from your computer or drag and drop it on the page.
  2. Press the "Convert" button in order to convert DXT5 to PTIF.
  3. When the conversion is completed, click "Download" on the desired converted PTIF file.

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DXT5 to PTIF

Useful information about DXT5

Extension: DXT5
Name: S3 Texture Compression - Dxt5
Mime Type: image/dxt
Converter: DXT5 Converter
Description: The DXT5 format is an alternate RGBA format. As in the DXT3 case, each 4x4 block takes up 128 bits. So it provides the same 4:1 compression as in the DXT3 case. Just as for the DXT3 format, there are two 64-bit chunks of data per block: an RGB chunk compressed as for DXT1 (with the same caveat as for DXT3), and an alpha chunk. Again the second chunk is the color chunk; the first is the alpha. Where DXT3 and DXT5 differ is how the alpha chunk is compressed. DXT5 compresses the alpha using a compression scheme similar to DXT1. The alpha data is stored as 2 8-bit alpha values, alpha0 and alpha1, followed by a 48-bit unsigned integer that describes how to combine these two reference alpha values to achieve the final alpha value. The 48-bit integer is also stored in little-endian order. The 48-bit unsigned integer contains 3-bit codes that describe how to compute the final alpha value. These codes are stored in the identical order as the codes in DXT1; they simply are 3 bits in size rather than 2. - Source

Useful information about PTIF

Extension: PTIF
Name: Pyramid Encoded TIFF
Mime Type: image/tiff
Converter: PTIF Converter
Description: PTIF is a tag-based file format for storing and interchanging raster images. A TIFF file can hold multiple images in a single file. The term "Pyramid TIFF" is used to describe a TIFF file that wraps a sequence of bitmaps that each represent the same image at increasingly coarse spatial resolutions. The individual images may be compressed or tiled. Compression is used when storage space savings are significant; tiling may yield more efficient delivery when most use involves zooming into image sections rather than viewing the whole. The term Pyramid TIFF or pyramid-encoded TIFF has been applied to different approaches, each based on valid internal TIFF structures, that have been used to support dynamic delivery of the underlying image at different spatial resolutions. - Source