Function GetJitterPhaseCount 

pub unsafe extern "C" fn GetJitterPhaseCount(
    renderWidth: i32,
    displayWidth: i32,
) -> i32

A helper function to calculate the jitter phase count from display resolution.

For more detailed information about the application of camera jitter to your application’s rendering please refer to the ffxFsr2GetJitterOffset function.

The table below shows the jitter phase count which this function would return for each of the quality presets.

Quality preset	Scale factor	Phase count
FFX_FSR2_QUALITY_MODE_QUALITY	1.5x	18
FFX_FSR2_QUALITY_MODE_BALANCED	1.7x	23
FFX_FSR2_QUALITY_MODE_PERFORMANCE	2.0x	32
FFX_FSR2_QUALITY_MODE_ULTRA_PERFORMANCE	3.0x	72
Custom	[1..n]x	ceil(8*n^2)

@param [in] renderWidth The render resolution width. @param [in] displayWidth The display resolution width.

@returns The jitter phase count for the scaling factor between renderWidth and displayWidth.

@ingroup FSR2