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Performing Floating-point Operations in Direct3D

Last Updated: 2/14/2017

The DirectX runtime saves and restores floating-point state when it calls many of a display driver's Direct3D callback functions. However, as described in Performing Floating-point Operations in DirectDraw, some of the driver's Direct3D callback functions must save floating-point state prior to performing floating-point operations and must restore floating-point state when the operations complete.

The DirectX runtime saves and restores floating-point state as required for the following Direct3D callback functions:

For the following callback functions, a Direct3D-supported display driver must save floating-point state before performing floating-point operations, and restore it when the operations are complete:

For more information about floating-point operations, see Floating-Point Operations in Graphics Driver Functions.

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