057367bf4f
Introduces support for FSR2 as a new upscaler option available from the project settings. Also introduces an specific render list for surfaces that require motion and the ability to derive motion vectors from depth buffer and camera motion.
333 lines
15 KiB
C++
333 lines
15 KiB
C++
// This file is part of the FidelityFX SDK.
|
|
//
|
|
// Copyright (c) 2022-2023 Advanced Micro Devices, Inc. All rights reserved.
|
|
//
|
|
// Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
// of this software and associated documentation files (the "Software"), to deal
|
|
// in the Software without restriction, including without limitation the rights
|
|
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
// copies of the Software, and to permit persons to whom the Software is
|
|
// furnished to do so, subject to the following conditions:
|
|
// The above copyright notice and this permission notice shall be included in
|
|
// all copies or substantial portions of the Software.
|
|
//
|
|
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
// THE SOFTWARE.
|
|
|
|
/// A define for a true value in a boolean expression.
|
|
///
|
|
/// @ingroup CPU
|
|
#define FFX_TRUE (1)
|
|
|
|
/// A define for a false value in a boolean expression.
|
|
///
|
|
/// @ingroup CPU
|
|
#define FFX_FALSE (0)
|
|
|
|
#if !defined(FFX_STATIC)
|
|
/// A define to abstract declaration of static variables and functions.
|
|
///
|
|
/// @ingroup CPU
|
|
#define FFX_STATIC static
|
|
#endif // #if !defined(FFX_STATIC)
|
|
|
|
#ifdef __clang__
|
|
#pragma clang diagnostic ignored "-Wunused-variable"
|
|
#endif
|
|
|
|
/// Interpret the bit layout of an IEEE-754 floating point value as an unsigned integer.
|
|
///
|
|
/// @param [in] x A 32bit floating value.
|
|
///
|
|
/// @returns
|
|
/// An unsigned 32bit integer value containing the bit pattern of <c><i>x</i></c>.
|
|
///
|
|
/// @ingroup CPU
|
|
FFX_STATIC FfxUInt32 ffxAsUInt32(FfxFloat32 x)
|
|
{
|
|
union
|
|
{
|
|
FfxFloat32 f;
|
|
FfxUInt32 u;
|
|
} bits;
|
|
|
|
bits.f = x;
|
|
return bits.u;
|
|
}
|
|
|
|
FFX_STATIC FfxFloat32 ffxDot2(FfxFloat32x2 a, FfxFloat32x2 b)
|
|
{
|
|
return a[0] * b[0] + a[1] * b[1];
|
|
}
|
|
|
|
FFX_STATIC FfxFloat32 ffxDot3(FfxFloat32x3 a, FfxFloat32x3 b)
|
|
{
|
|
return a[0] * b[0] + a[1] * b[1] + a[2] * b[2];
|
|
}
|
|
|
|
FFX_STATIC FfxFloat32 ffxDot4(FfxFloat32x4 a, FfxFloat32x4 b)
|
|
{
|
|
return a[0] * b[0] + a[1] * b[1] + a[2] * b[2] + a[3] * b[3];
|
|
}
|
|
|
|
/// Compute the linear interopation between two values.
|
|
///
|
|
/// Implemented by calling the GLSL <c><i>mix</i></c> instrinsic function. Implements the
|
|
/// following math:
|
|
///
|
|
/// (1 - t) * x + t * y
|
|
///
|
|
/// @param [in] x The first value to lerp between.
|
|
/// @param [in] y The second value to lerp between.
|
|
/// @param [in] t The value to determine how much of <c><i>x</i></c> and how much of <c><i>y</i></c>.
|
|
///
|
|
/// @returns
|
|
/// A linearly interpolated value between <c><i>x</i></c> and <c><i>y</i></c> according to <c><i>t</i></c>.
|
|
///
|
|
/// @ingroup CPU
|
|
FFX_STATIC FfxFloat32 ffxLerp(FfxFloat32 x, FfxFloat32 y, FfxFloat32 t)
|
|
{
|
|
return y * t + (-x * t + x);
|
|
}
|
|
|
|
/// Compute the reciprocal of a value.
|
|
///
|
|
/// @param [in] x The value to compute the reciprocal for.
|
|
///
|
|
/// @returns
|
|
/// The reciprocal value of <c><i>x</i></c>.
|
|
///
|
|
/// @ingroup CPU
|
|
FFX_STATIC FfxFloat32 ffxReciprocal(FfxFloat32 a)
|
|
{
|
|
return 1.0f / a;
|
|
}
|
|
|
|
/// Compute the square root of a value.
|
|
///
|
|
/// @param [in] x The first value to compute the min of.
|
|
///
|
|
/// @returns
|
|
/// The the square root of <c><i>x</i></c>.
|
|
///
|
|
/// @ingroup CPU
|
|
FFX_STATIC FfxFloat32 ffxSqrt(FfxFloat32 x)
|
|
{
|
|
return sqrt(x);
|
|
}
|
|
|
|
FFX_STATIC FfxUInt32 AShrSU1(FfxUInt32 a, FfxUInt32 b)
|
|
{
|
|
return FfxUInt32(FfxInt32(a) >> FfxInt32(b));
|
|
}
|
|
|
|
/// Compute the factional part of a decimal value.
|
|
///
|
|
/// This function calculates <c><i>x - floor(x)</i></c>.
|
|
///
|
|
/// @param [in] x The value to compute the fractional part from.
|
|
///
|
|
/// @returns
|
|
/// The fractional part of <c><i>x</i></c>.
|
|
///
|
|
/// @ingroup CPU
|
|
FFX_STATIC FfxFloat32 ffxFract(FfxFloat32 a)
|
|
{
|
|
return a - floor(a);
|
|
}
|
|
|
|
/// Compute the reciprocal square root of a value.
|
|
///
|
|
/// @param [in] x The value to compute the reciprocal for.
|
|
///
|
|
/// @returns
|
|
/// The reciprocal square root value of <c><i>x</i></c>.
|
|
///
|
|
/// @ingroup CPU
|
|
FFX_STATIC FfxFloat32 rsqrt(FfxFloat32 a)
|
|
{
|
|
return ffxReciprocal(ffxSqrt(a));
|
|
}
|
|
|
|
FFX_STATIC FfxFloat32 ffxMin(FfxFloat32 x, FfxFloat32 y)
|
|
{
|
|
return x < y ? x : y;
|
|
}
|
|
|
|
FFX_STATIC FfxUInt32 ffxMin(FfxUInt32 x, FfxUInt32 y)
|
|
{
|
|
return x < y ? x : y;
|
|
}
|
|
|
|
FFX_STATIC FfxFloat32 ffxMax(FfxFloat32 x, FfxFloat32 y)
|
|
{
|
|
return x > y ? x : y;
|
|
}
|
|
|
|
FFX_STATIC FfxUInt32 ffxMax(FfxUInt32 x, FfxUInt32 y)
|
|
{
|
|
return x > y ? x : y;
|
|
}
|
|
|
|
/// Clamp a value to a [0..1] range.
|
|
///
|
|
/// @param [in] x The value to clamp to [0..1] range.
|
|
///
|
|
/// @returns
|
|
/// The clamped version of <c><i>x</i></c>.
|
|
///
|
|
/// @ingroup CPU
|
|
FFX_STATIC FfxFloat32 ffxSaturate(FfxFloat32 a)
|
|
{
|
|
return ffxMin(1.0f, ffxMax(0.0f, a));
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
|
|
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
FFX_STATIC void opAAddOneF3(FfxFloat32x3 d, FfxFloat32x3 a, FfxFloat32 b)
|
|
{
|
|
d[0] = a[0] + b;
|
|
d[1] = a[1] + b;
|
|
d[2] = a[2] + b;
|
|
return;
|
|
}
|
|
|
|
FFX_STATIC void opACpyF3(FfxFloat32x3 d, FfxFloat32x3 a)
|
|
{
|
|
d[0] = a[0];
|
|
d[1] = a[1];
|
|
d[2] = a[2];
|
|
return;
|
|
}
|
|
|
|
FFX_STATIC void opAMulF3(FfxFloat32x3 d, FfxFloat32x3 a, FfxFloat32x3 b)
|
|
{
|
|
d[0] = a[0] * b[0];
|
|
d[1] = a[1] * b[1];
|
|
d[2] = a[2] * b[2];
|
|
return;
|
|
}
|
|
|
|
FFX_STATIC void opAMulOneF3(FfxFloat32x3 d, FfxFloat32x3 a, FfxFloat32 b)
|
|
{
|
|
d[0] = a[0] * b;
|
|
d[1] = a[1] * b;
|
|
d[2] = a[2] * b;
|
|
return;
|
|
}
|
|
|
|
FFX_STATIC void opARcpF3(FfxFloat32x3 d, FfxFloat32x3 a)
|
|
{
|
|
d[0] = ffxReciprocal(a[0]);
|
|
d[1] = ffxReciprocal(a[1]);
|
|
d[2] = ffxReciprocal(a[2]);
|
|
return;
|
|
}
|
|
|
|
/// Convert FfxFloat32 to half (in lower 16-bits of output).
|
|
///
|
|
/// This function implements the same fast technique that is documented here: ftp://ftp.fox-toolkit.org/pub/fasthalffloatconversion.pdf
|
|
///
|
|
/// The function supports denormals.
|
|
///
|
|
/// Some conversion rules are to make computations possibly "safer" on the GPU,
|
|
/// -INF & -NaN -> -65504
|
|
/// +INF & +NaN -> +65504
|
|
///
|
|
/// @param [in] f The 32bit floating point value to convert.
|
|
///
|
|
/// @returns
|
|
/// The closest 16bit floating point value to <c><i>f</i></c>.
|
|
///
|
|
/// @ingroup CPU
|
|
FFX_STATIC FfxUInt32 f32tof16(FfxFloat32 f)
|
|
{
|
|
static FfxUInt16 base[512] = {
|
|
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
|
|
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
|
|
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
|
|
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
|
|
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
|
|
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0001, 0x0002, 0x0004, 0x0008, 0x0010, 0x0020, 0x0040, 0x0080, 0x0100, 0x0200, 0x0400,
|
|
0x0800, 0x0c00, 0x1000, 0x1400, 0x1800, 0x1c00, 0x2000, 0x2400, 0x2800, 0x2c00, 0x3000, 0x3400, 0x3800, 0x3c00, 0x4000, 0x4400, 0x4800, 0x4c00, 0x5000,
|
|
0x5400, 0x5800, 0x5c00, 0x6000, 0x6400, 0x6800, 0x6c00, 0x7000, 0x7400, 0x7800, 0x7bff, 0x7bff, 0x7bff, 0x7bff, 0x7bff, 0x7bff, 0x7bff, 0x7bff, 0x7bff,
|
|
0x7bff, 0x7bff, 0x7bff, 0x7bff, 0x7bff, 0x7bff, 0x7bff, 0x7bff, 0x7bff, 0x7bff, 0x7bff, 0x7bff, 0x7bff, 0x7bff, 0x7bff, 0x7bff, 0x7bff, 0x7bff, 0x7bff,
|
|
0x7bff, 0x7bff, 0x7bff, 0x7bff, 0x7bff, 0x7bff, 0x7bff, 0x7bff, 0x7bff, 0x7bff, 0x7bff, 0x7bff, 0x7bff, 0x7bff, 0x7bff, 0x7bff, 0x7bff, 0x7bff, 0x7bff,
|
|
0x7bff, 0x7bff, 0x7bff, 0x7bff, 0x7bff, 0x7bff, 0x7bff, 0x7bff, 0x7bff, 0x7bff, 0x7bff, 0x7bff, 0x7bff, 0x7bff, 0x7bff, 0x7bff, 0x7bff, 0x7bff, 0x7bff,
|
|
0x7bff, 0x7bff, 0x7bff, 0x7bff, 0x7bff, 0x7bff, 0x7bff, 0x7bff, 0x7bff, 0x7bff, 0x7bff, 0x7bff, 0x7bff, 0x7bff, 0x7bff, 0x7bff, 0x7bff, 0x7bff, 0x7bff,
|
|
0x7bff, 0x7bff, 0x7bff, 0x7bff, 0x7bff, 0x7bff, 0x7bff, 0x7bff, 0x7bff, 0x7bff, 0x7bff, 0x7bff, 0x7bff, 0x7bff, 0x7bff, 0x7bff, 0x7bff, 0x7bff, 0x7bff,
|
|
0x7bff, 0x7bff, 0x7bff, 0x7bff, 0x7bff, 0x7bff, 0x7bff, 0x7bff, 0x7bff, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000,
|
|
0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000,
|
|
0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000,
|
|
0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000,
|
|
0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000,
|
|
0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8000, 0x8001, 0x8002,
|
|
0x8004, 0x8008, 0x8010, 0x8020, 0x8040, 0x8080, 0x8100, 0x8200, 0x8400, 0x8800, 0x8c00, 0x9000, 0x9400, 0x9800, 0x9c00, 0xa000, 0xa400, 0xa800, 0xac00,
|
|
0xb000, 0xb400, 0xb800, 0xbc00, 0xc000, 0xc400, 0xc800, 0xcc00, 0xd000, 0xd400, 0xd800, 0xdc00, 0xe000, 0xe400, 0xe800, 0xec00, 0xf000, 0xf400, 0xf800,
|
|
0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff,
|
|
0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff,
|
|
0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff,
|
|
0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff,
|
|
0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff,
|
|
0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff, 0xfbff
|
|
};
|
|
|
|
static FfxUInt8 shift[512] = {
|
|
0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18,
|
|
0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18,
|
|
0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18,
|
|
0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18,
|
|
0x18, 0x18, 0x18, 0x17, 0x16, 0x15, 0x14, 0x13, 0x12, 0x11, 0x10, 0x0f, 0x0e, 0x0d, 0x0d, 0x0d, 0x0d, 0x0d, 0x0d, 0x0d, 0x0d, 0x0d, 0x0d, 0x0d, 0x0d,
|
|
0x0d, 0x0d, 0x0d, 0x0d, 0x0d, 0x0d, 0x0d, 0x0d, 0x0d, 0x0d, 0x0d, 0x0d, 0x0d, 0x0d, 0x0d, 0x0d, 0x0d, 0x0d, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18,
|
|
0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18,
|
|
0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18,
|
|
0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18,
|
|
0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18,
|
|
0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18,
|
|
0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18,
|
|
0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18,
|
|
0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18,
|
|
0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x17, 0x16, 0x15, 0x14, 0x13, 0x12, 0x11, 0x10, 0x0f, 0x0e, 0x0d, 0x0d, 0x0d, 0x0d, 0x0d, 0x0d,
|
|
0x0d, 0x0d, 0x0d, 0x0d, 0x0d, 0x0d, 0x0d, 0x0d, 0x0d, 0x0d, 0x0d, 0x0d, 0x0d, 0x0d, 0x0d, 0x0d, 0x0d, 0x0d, 0x0d, 0x0d, 0x0d, 0x0d, 0x0d, 0x0d, 0x18,
|
|
0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18,
|
|
0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18,
|
|
0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18,
|
|
0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18,
|
|
0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18
|
|
};
|
|
|
|
union
|
|
{
|
|
FfxFloat32 f;
|
|
FfxUInt32 u;
|
|
} bits;
|
|
|
|
bits.f = f;
|
|
FfxUInt32 u = bits.u;
|
|
FfxUInt32 i = u >> 23;
|
|
return (FfxUInt32)(base[i]) + ((u & 0x7fffff) >> shift[i]);
|
|
}
|
|
|
|
/// Pack 2x32-bit floating point values in a single 32bit value.
|
|
///
|
|
/// This function first converts each component of <c><i>value</i></c> into their nearest 16-bit floating
|
|
/// point representation, and then stores the X and Y components in the lower and upper 16 bits of the
|
|
/// 32bit unsigned integer respectively.
|
|
///
|
|
/// @param [in] value A 2-dimensional floating point value to convert and pack.
|
|
///
|
|
/// @returns
|
|
/// A packed 32bit value containing 2 16bit floating point values.
|
|
///
|
|
/// @ingroup CPU
|
|
FFX_STATIC FfxUInt32 packHalf2x16(FfxFloat32x2 a)
|
|
{
|
|
return f32tof16(a[0]) + (f32tof16(a[1]) << 16);
|
|
}
|