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blender/intern/cycles/util/util_math_float3.h
Lukas Stockner 43b374e8c5 Cycles: Implement denoising option for reducing noise in the rendered image 
This commit contains the first part of the new Cycles denoising option,
which filters the resulting image using information gathered during rendering
to get rid of noise while preserving visual features as well as possible.

To use the option, enable it in the render layer options. The default settings
fit a wide range of scenes, but the user can tweak individual settings to
control the tradeoff between a noise-free image, image details, and calculation
time.

Note that the denoiser may still change in the future and that some features
are not implemented yet. The most important missing feature is animation
denoising, which uses information from multiple frames at once to produce a
flicker-free and smoother result. These features will be added in the future.

Finally, thanks to all the people who supported this project:

- Google (through the GSoC) and Theory Studios for sponsoring the development
- The authors of the papers I used for implementing the denoiser (more details
  on them will be included in the technical docs)
- The other Cycles devs for feedback on the code, especially Sergey for
  mentoring the GSoC project and Brecht for the code review!
- And of course the users who helped with testing, reported bugs and things
  that could and/or should work better!
2017-05-07 14:40:58 +02:00

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/*
* Copyright 2011-2017 Blender Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef __UTIL_MATH_FLOAT3_H__
#define __UTIL_MATH_FLOAT3_H__
#ifndef __UTIL_MATH_H__
# error "Do not include this file directly, include util_types.h instead."
#endif
CCL_NAMESPACE_BEGIN
/*******************************************************************************
* Declaration.
*/
#ifndef __KERNEL_OPENCL__
ccl_device_inline float3 operator-(const float3& a);
ccl_device_inline float3 operator*(const float3& a, const float3& b);
ccl_device_inline float3 operator*(const float3& a, const float f);
ccl_device_inline float3 operator*(const float f, const float3& a);
ccl_device_inline float3 operator/(const float f, const float3& a);
ccl_device_inline float3 operator/(const float3& a, const float f);
ccl_device_inline float3 operator/(const float3& a, const float3& b);
ccl_device_inline float3 operator+(const float3& a, const float3& b);
ccl_device_inline float3 operator-(const float3& a, const float3& b);
ccl_device_inline float3 operator+=(float3& a, const float3& b);
ccl_device_inline float3 operator-=(float3& a, const float3& b);
ccl_device_inline float3 operator*=(float3& a, const float3& b);
ccl_device_inline float3 operator*=(float3& a, float f);
ccl_device_inline float3 operator/=(float3& a, const float3& b);
ccl_device_inline float3 operator/=(float3& a, float f);
ccl_device_inline bool operator==(const float3& a, const float3& b);
ccl_device_inline bool operator!=(const float3& a, const float3& b);
ccl_device_inline float dot(const float3& a, const float3& b);
ccl_device_inline float dot_xy(const float3& a, const float3& b);
ccl_device_inline float3 cross(const float3& a, const float3& b);
ccl_device_inline float3 normalize(const float3& a);
ccl_device_inline float3 min(const float3& a, const float3& b);
ccl_device_inline float3 max(const float3& a, const float3& b);
ccl_device_inline float3 clamp(const float3& a, const float3& mn, const float3& mx);
ccl_device_inline float3 fabs(const float3& a);
ccl_device_inline float3 mix(const float3& a, const float3& b, float t);
ccl_device_inline float3 rcp(const float3& a);
#endif /* !__KERNEL_OPENCL__ */
ccl_device_inline float max3(float3 a);
ccl_device_inline float len(const float3 a);
ccl_device_inline float len_squared(const float3 a);
ccl_device_inline float3 saturate3(float3 a);
ccl_device_inline float3 safe_normalize(const float3 a);
ccl_device_inline float3 normalize_len(const float3 a, float *t);;
ccl_device_inline float3 safe_normalize_len(const float3 a, float *t);
ccl_device_inline float3 interp(float3 a, float3 b, float t);
ccl_device_inline bool is_zero(const float3 a);
ccl_device_inline float reduce_add(const float3 a);
ccl_device_inline float average(const float3 a);
ccl_device_inline bool isequal_float3(const float3 a, const float3 b);
/*******************************************************************************
* Definition.
*/
#ifndef __KERNEL_OPENCL__
ccl_device_inline float3 operator-(const float3& a)
{
#ifdef __KERNEL_SSE__
return float3(_mm_xor_ps(a.m128, _mm_castsi128_ps(_mm_set1_epi32(0x80000000))));
#else
return make_float3(-a.x, -a.y, -a.z);
#endif
}
ccl_device_inline float3 operator*(const float3& a, const float3& b)
{
#ifdef __KERNEL_SSE__
return float3(_mm_mul_ps(a.m128,b.m128));
#else
return make_float3(a.x*b.x, a.y*b.y, a.z*b.z);
#endif
}
ccl_device_inline float3 operator*(const float3& a, const float f)
{
#ifdef __KERNEL_SSE__
return float3(_mm_mul_ps(a.m128,_mm_set1_ps(f)));
#else
return make_float3(a.x*f, a.y*f, a.z*f);
#endif
}
ccl_device_inline float3 operator*(const float f, const float3& a)
{
/* TODO(sergey): Currently disabled, gives speedup but causes precision issues. */
#if defined(__KERNEL_SSE__) && 0
return float3(_mm_mul_ps(_mm_set1_ps(f), a.m128));
#else
return make_float3(a.x*f, a.y*f, a.z*f);
#endif
}
ccl_device_inline float3 operator/(const float f, const float3& a)
{
/* TODO(sergey): Currently disabled, gives speedup but causes precision issues. */
#if defined(__KERNEL_SSE__) && 0
__m128 rc = _mm_rcp_ps(a.m128);
return float3(_mm_mul_ps(_mm_set1_ps(f),rc));
#else
return make_float3(f / a.x, f / a.y, f / a.z);
#endif
}
ccl_device_inline float3 operator/(const float3& a, const float f)
{
float invf = 1.0f/f;
return a * invf;
}
ccl_device_inline float3 operator/(const float3& a, const float3& b)
{
/* TODO(sergey): Currently disabled, gives speedup but causes precision issues. */
#if defined(__KERNEL_SSE__) && 0
__m128 rc = _mm_rcp_ps(b.m128);
return float3(_mm_mul_ps(a, rc));
#else
return make_float3(a.x / b.x, a.y / b.y, a.z / b.z);
#endif
}
ccl_device_inline float3 operator+(const float3& a, const float3& b)
{
#ifdef __KERNEL_SSE__
return float3(_mm_add_ps(a.m128, b.m128));
#else
return make_float3(a.x + b.x, a.y + b.y, a.z + b.z);
#endif
}
ccl_device_inline float3 operator-(const float3& a, const float3& b)
{
#ifdef __KERNEL_SSE__
return float3(_mm_sub_ps(a.m128, b.m128));
#else
return make_float3(a.x - b.x, a.y - b.y, a.z - b.z);
#endif
}
ccl_device_inline float3 operator+=(float3& a, const float3& b)
{
return a = a + b;
}
ccl_device_inline float3 operator-=(float3& a, const float3& b)
{
return a = a - b;
}
ccl_device_inline float3 operator*=(float3& a, const float3& b)
{
return a = a * b;
}
ccl_device_inline float3 operator*=(float3& a, float f)
{
return a = a * f;
}
ccl_device_inline float3 operator/=(float3& a, const float3& b)
{
return a = a / b;
}
ccl_device_inline float3 operator/=(float3& a, float f)
{
float invf = 1.0f/f;
return a = a * invf;
}
ccl_device_inline bool operator==(const float3& a, const float3& b)
{
#ifdef __KERNEL_SSE__
return (_mm_movemask_ps(_mm_cmpeq_ps(a.m128, b.m128)) & 7) == 7;
#else
return (a.x == b.x && a.y == b.y && a.z == b.z);
#endif
}
ccl_device_inline bool operator!=(const float3& a, const float3& b)
{
return !(a == b);
}
ccl_device_inline float dot(const float3& a, const float3& b)
{
#if defined(__KERNEL_SSE41__) && defined(__KERNEL_SSE__)
return _mm_cvtss_f32(_mm_dp_ps(a, b, 0x7F));
#else
return a.x*b.x + a.y*b.y + a.z*b.z;
#endif
}
ccl_device_inline float dot_xy(const float3& a, const float3& b)
{
#if defined(__KERNEL_SSE41__) && defined(__KERNEL_SSE__)
return _mm_cvtss_f32(_mm_hadd_ps(_mm_mul_ps(a,b),b));
#else
return a.x*b.x + a.y*b.y;
#endif
}
ccl_device_inline float3 cross(const float3& a, const float3& b)
{
float3 r = make_float3(a.y*b.z - a.z*b.y, a.z*b.x - a.x*b.z, a.x*b.y - a.y*b.x);
return r;
}
ccl_device_inline float3 normalize(const float3& a)
{
#if defined(__KERNEL_SSE41__) && defined(__KERNEL_SSE__)
__m128 norm = _mm_sqrt_ps(_mm_dp_ps(a.m128, a.m128, 0x7F));
return float3(_mm_div_ps(a.m128, norm));
#else
return a/len(a);
#endif
}
ccl_device_inline float3 min(const float3& a, const float3& b)
{
#ifdef __KERNEL_SSE__
return float3(_mm_min_ps(a.m128, b.m128));
#else
return make_float3(min(a.x, b.x), min(a.y, b.y), min(a.z, b.z));
#endif
}
ccl_device_inline float3 max(const float3& a, const float3& b)
{
#ifdef __KERNEL_SSE__
return float3(_mm_max_ps(a.m128, b.m128));
#else
return make_float3(max(a.x, b.x), max(a.y, b.y), max(a.z, b.z));
#endif
}
ccl_device_inline float3 clamp(const float3& a, const float3& mn, const float3& mx)
{
return min(max(a, mn), mx);
}
ccl_device_inline float3 fabs(const float3& a)
{
#ifdef __KERNEL_SSE__
__m128 mask = _mm_castsi128_ps(_mm_set1_epi32(0x7fffffff));
return float3(_mm_and_ps(a.m128, mask));
#else
return make_float3(fabsf(a.x), fabsf(a.y), fabsf(a.z));
#endif
}
ccl_device_inline float3 mix(const float3& a, const float3& b, float t)
{
return a + t*(b - a);
}
ccl_device_inline float3 rcp(const float3& a)
{
#ifdef __KERNEL_SSE__
const float4 r(_mm_rcp_ps(a.m128));
return float3(_mm_sub_ps(_mm_add_ps(r, r),
_mm_mul_ps(_mm_mul_ps(r, r), a)));
#else
return make_float3(1.0f/a.x, 1.0f/a.y, 1.0f/a.z);
#endif
}
#endif /* !__KERNEL_OPENCL__ */
ccl_device_inline float max3(float3 a)
{
return max(max(a.x, a.y), a.z);
}
ccl_device_inline float len(const float3 a)
{
#if defined(__KERNEL_SSE41__) && defined(__KERNEL_SSE__)
return _mm_cvtss_f32(_mm_sqrt_ss(_mm_dp_ps(a.m128, a.m128, 0x7F)));
#else
return sqrtf(dot(a, a));
#endif
}
ccl_device_inline float len_squared(const float3 a)
{
return dot(a, a);
}
ccl_device_inline float3 saturate3(float3 a)
{
return make_float3(saturate(a.x), saturate(a.y), saturate(a.z));
}
ccl_device_inline float3 normalize_len(const float3 a, float *t)
{
*t = len(a);
float x = 1.0f / *t;
return a*x;
}
ccl_device_inline float3 safe_normalize(const float3 a)
{
float t = len(a);
return (t != 0.0f)? a * (1.0f/t) : a;
}
ccl_device_inline float3 safe_normalize_len(const float3 a, float *t)
{
*t = len(a);
return (*t != 0.0f)? a/(*t): a;
}
ccl_device_inline float3 interp(float3 a, float3 b, float t)
{
return a + t*(b - a);
}
ccl_device_inline bool is_zero(const float3 a)
{
#ifdef __KERNEL_SSE__
return a == make_float3(0.0f);
#else
return (a.x == 0.0f && a.y == 0.0f && a.z == 0.0f);
#endif
}
ccl_device_inline float reduce_add(const float3 a)
{
return (a.x + a.y + a.z);
}
ccl_device_inline float average(const float3 a)
{
return reduce_add(a)*(1.0f/3.0f);
}
ccl_device_inline bool isequal_float3(const float3 a, const float3 b)
{
#ifdef __KERNEL_OPENCL__
return all(a == b);
#else
return a == b;
#endif
}
ccl_device_inline float3 ensure_finite3(float3 v)
{
if(!isfinite_safe(v.x)) v.x = 0.0;
if(!isfinite_safe(v.y)) v.y = 0.0;
if(!isfinite_safe(v.z)) v.z = 0.0;
return v;
}
CCL_NAMESPACE_END
#endif /* __UTIL_MATH_FLOAT3_H__ */
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