/src/core/LogTransform.cpp
http://github.com/imageworks/OpenColorIO · C++ · 157 lines · 97 code · 30 blank · 30 comment · 0 complexity · 418e5b504b2ed1693a4341435744ebf5 MD5 · raw file
- /*
- Copyright (c) 2003-2010 Sony Pictures Imageworks Inc., et al.
- All Rights Reserved.
- Redistribution and use in source and binary forms, with or without
- modification, are permitted provided that the following conditions are
- met:
- * Redistributions of source code must retain the above copyright
- notice, this list of conditions and the following disclaimer.
- * Redistributions in binary form must reproduce the above copyright
- notice, this list of conditions and the following disclaimer in the
- documentation and/or other materials provided with the distribution.
- * Neither the name of Sony Pictures Imageworks nor the names of its
- contributors may be used to endorse or promote products derived from
- this software without specific prior written permission.
- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
- #include <cstring>
- #include <sstream>
- #include <vector>
- #include <OpenColorIO/OpenColorIO.h>
- #include "LogOps.h"
- #include "OpBuilders.h"
- OCIO_NAMESPACE_ENTER
- {
- LogTransformRcPtr LogTransform::Create()
- {
- return LogTransformRcPtr(new LogTransform(), &deleter);
- }
-
- void LogTransform::deleter(LogTransform* t)
- {
- delete t;
- }
-
-
- class LogTransform::Impl
- {
- public:
- TransformDirection dir_;
- float base_;
-
- Impl() :
- dir_(TRANSFORM_DIR_FORWARD),
- base_(2.0)
- { }
-
- ~Impl()
- { }
-
- Impl& operator= (const Impl & rhs)
- {
- dir_ = rhs.dir_;
- base_ = rhs.base_;
- return *this;
- }
- };
-
- ///////////////////////////////////////////////////////////////////////////
-
-
- LogTransform::LogTransform()
- : m_impl(new LogTransform::Impl)
- {
- }
-
- TransformRcPtr LogTransform::createEditableCopy() const
- {
- LogTransformRcPtr transform = LogTransform::Create();
- *(transform->m_impl) = *m_impl;
- return transform;
- }
-
- LogTransform::~LogTransform()
- {
- delete m_impl;
- m_impl = NULL;
- }
-
- LogTransform& LogTransform::operator= (const LogTransform & rhs)
- {
- *m_impl = *rhs.m_impl;
- return *this;
- }
-
- TransformDirection LogTransform::getDirection() const
- {
- return getImpl()->dir_;
- }
-
- void LogTransform::setDirection(TransformDirection dir)
- {
- getImpl()->dir_ = dir;
- }
-
-
- float LogTransform::getBase() const
- {
- return getImpl()->base_;
- }
-
- void LogTransform::setBase(float val)
- {
- getImpl()->base_ = val;
- }
-
- std::ostream& operator<< (std::ostream& os, const LogTransform& t)
- {
- os << "<LogTransform ";
- os << "base=" << t.getBase() << ", ";
- os << "direction=" << TransformDirectionToString(t.getDirection()) << ", ";
- os << ">\n";
-
- return os;
- }
-
-
- ///////////////////////////////////////////////////////////////////////////
-
-
- void BuildLogOps(OpRcPtrVec & ops,
- const Config& /*config*/,
- const LogTransform& transform,
- TransformDirection dir)
- {
- TransformDirection combinedDir = CombineTransformDirections(dir,
- transform.getDirection());
-
- float basescalar = transform.getBase();
- float base[3] = { basescalar, basescalar, basescalar };
-
- float k[3] = { 1.0f, 1.0f, 1.0f };
- float m[3] = { 1.0f, 1.0f, 1.0f };
- float b[3] = { 0.0f, 0.0f, 0.0f };
- float kb[3] = { 0.0f, 0.0f, 0.0f };
-
- // output = k * log(mx+b, base) + kb
- CreateLogOp(ops,
- k, m, b, base, kb,
- combinedDir);
- }
- }
- OCIO_NAMESPACE_EXIT