A 64-bit extended range pixel format with four fixed-point components: 10-bit blue, 10-bit green, 10-bit red, and 10-bit alpha.
Pixel data is stored in blue, green, red, and alpha order, from least significant bit to most significant bit. Each component is stored in a 16-bit chunk that's arranged as follows:
The 10 left-most bits store the component's data.
The 6 right-most bits are used as padding, and their value is 0.
The blue, green, and red components are linearly encoded, and their values range from -0.752941 to 1.25098. The alpha component is always clamped to a [0.0, 1.0] range in sampling, rendering, and writing operations, despite supporting values outside this range.