632 lines
13 KiB
C++
632 lines
13 KiB
C++
///////////////////////////////////////////////////////////////////////////
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//
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// Copyright (c) 2007, Industrial Light & Magic, a division of Lucas
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// Digital Ltd. LLC
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//
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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// * Neither the name of Industrial Light & Magic nor the names of
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// its contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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//
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///////////////////////////////////////////////////////////////////////////
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//-----------------------------------------------------------------------------
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//
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// ACES image file I/O.
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//
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//-----------------------------------------------------------------------------
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#include <ImfAcesFile.h>
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#include <ImfRgbaFile.h>
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#include <ImfStandardAttributes.h>
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#include <Iex.h>
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using namespace std;
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using namespace Imath;
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using namespace Iex;
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namespace Imf {
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const Chromaticities &
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acesChromaticities ()
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{
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static const Chromaticities acesChr
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(V2f (0.73470, 0.26530), // red
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V2f (0.00000, 1.00000), // green
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V2f (0.00010, -0.07700), // blue
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V2f (0.32168, 0.33767)); // white
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return acesChr;
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}
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class AcesOutputFile::Data
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{
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public:
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Data();
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~Data();
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RgbaOutputFile * rgbaFile;
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};
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AcesOutputFile::Data::Data ():
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rgbaFile (0)
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{
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// empty
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}
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AcesOutputFile::Data::~Data ()
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{
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delete rgbaFile;
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}
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namespace {
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void
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checkCompression (Compression compression)
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{
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//
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// Not all compression methods are allowed in ACES files.
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//
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switch (compression)
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{
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case NO_COMPRESSION:
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case PIZ_COMPRESSION:
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case B44A_COMPRESSION:
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break;
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default:
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throw ArgExc ("Invalid compression type for ACES file.");
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}
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}
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} // namespace
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AcesOutputFile::AcesOutputFile
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(const std::string &name,
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const Header &header,
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RgbaChannels rgbaChannels,
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int numThreads)
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:
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_data (new Data)
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{
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checkCompression (header.compression());
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Header newHeader = header;
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addChromaticities (newHeader, acesChromaticities());
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addAdoptedNeutral (newHeader, acesChromaticities().white);
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_data->rgbaFile = new RgbaOutputFile (name.c_str(),
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newHeader,
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rgbaChannels,
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numThreads);
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_data->rgbaFile->setYCRounding (7, 6);
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}
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AcesOutputFile::AcesOutputFile
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(OStream &os,
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const Header &header,
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RgbaChannels rgbaChannels,
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int numThreads)
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:
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_data (new Data)
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{
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checkCompression (header.compression());
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Header newHeader = header;
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addChromaticities (newHeader, acesChromaticities());
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addAdoptedNeutral (newHeader, acesChromaticities().white);
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_data->rgbaFile = new RgbaOutputFile (os,
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header,
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rgbaChannels,
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numThreads);
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_data->rgbaFile->setYCRounding (7, 6);
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}
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AcesOutputFile::AcesOutputFile
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(const std::string &name,
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const Imath::Box2i &displayWindow,
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const Imath::Box2i &dataWindow,
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RgbaChannels rgbaChannels,
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float pixelAspectRatio,
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const Imath::V2f screenWindowCenter,
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float screenWindowWidth,
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LineOrder lineOrder,
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Compression compression,
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int numThreads)
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:
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_data (new Data)
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{
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checkCompression (compression);
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Header newHeader (displayWindow,
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dataWindow.isEmpty()? displayWindow: dataWindow,
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pixelAspectRatio,
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screenWindowCenter,
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screenWindowWidth,
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lineOrder,
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compression);
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addChromaticities (newHeader, acesChromaticities());
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addAdoptedNeutral (newHeader, acesChromaticities().white);
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_data->rgbaFile = new RgbaOutputFile (name.c_str(),
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newHeader,
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rgbaChannels,
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numThreads);
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_data->rgbaFile->setYCRounding (7, 6);
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}
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AcesOutputFile::AcesOutputFile
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(const std::string &name,
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int width,
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int height,
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RgbaChannels rgbaChannels,
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float pixelAspectRatio,
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const Imath::V2f screenWindowCenter,
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float screenWindowWidth,
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LineOrder lineOrder,
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Compression compression,
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int numThreads)
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:
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_data (new Data)
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{
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checkCompression (compression);
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Header newHeader (width,
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height,
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pixelAspectRatio,
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screenWindowCenter,
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screenWindowWidth,
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lineOrder,
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compression);
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addChromaticities (newHeader, acesChromaticities());
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addAdoptedNeutral (newHeader, acesChromaticities().white);
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_data->rgbaFile = new RgbaOutputFile (name.c_str(),
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newHeader,
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rgbaChannels,
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numThreads);
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_data->rgbaFile->setYCRounding (7, 6);
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}
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AcesOutputFile::~AcesOutputFile ()
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{
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delete _data;
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}
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void
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AcesOutputFile::setFrameBuffer
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(const Rgba *base,
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size_t xStride,
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size_t yStride)
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{
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_data->rgbaFile->setFrameBuffer (base, xStride, yStride);
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}
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void
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AcesOutputFile::writePixels (int numScanLines)
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{
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_data->rgbaFile->writePixels (numScanLines);
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}
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int
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AcesOutputFile::currentScanLine () const
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{
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return _data->rgbaFile->currentScanLine();
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}
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const Header &
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AcesOutputFile::header () const
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{
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return _data->rgbaFile->header();
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}
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const Imath::Box2i &
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AcesOutputFile::displayWindow () const
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{
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return _data->rgbaFile->displayWindow();
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}
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const Imath::Box2i &
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AcesOutputFile::dataWindow () const
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{
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return _data->rgbaFile->dataWindow();
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}
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float
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AcesOutputFile::pixelAspectRatio () const
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{
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return _data->rgbaFile->pixelAspectRatio();
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}
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const Imath::V2f
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AcesOutputFile::screenWindowCenter () const
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{
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return _data->rgbaFile->screenWindowCenter();
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}
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float
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AcesOutputFile::screenWindowWidth () const
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{
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return _data->rgbaFile->screenWindowWidth();
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}
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LineOrder
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AcesOutputFile::lineOrder () const
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{
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return _data->rgbaFile->lineOrder();
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}
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Compression
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AcesOutputFile::compression () const
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{
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return _data->rgbaFile->compression();
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}
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RgbaChannels
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AcesOutputFile::channels () const
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{
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return _data->rgbaFile->channels();
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}
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void
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AcesOutputFile::updatePreviewImage (const PreviewRgba pixels[])
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{
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_data->rgbaFile->updatePreviewImage (pixels);
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}
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class AcesInputFile::Data
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{
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public:
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Data();
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~Data();
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void initColorConversion ();
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RgbaInputFile * rgbaFile;
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Rgba * fbBase;
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size_t fbXStride;
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size_t fbYStride;
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int minX;
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int maxX;
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bool mustConvertColor;
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M44f fileToAces;
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};
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AcesInputFile::Data::Data ():
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rgbaFile (0),
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fbBase (0),
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fbXStride (0),
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fbYStride (0),
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minX (0),
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maxX (0),
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mustConvertColor (false)
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{
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// empty
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}
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AcesInputFile::Data::~Data ()
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{
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delete rgbaFile;
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}
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void
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AcesInputFile::Data::initColorConversion ()
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{
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const Header &header = rgbaFile->header();
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Chromaticities fileChr;
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if (hasChromaticities (header))
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fileChr = chromaticities (header);
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V2f fileNeutral = fileChr.white;
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if (hasAdoptedNeutral (header))
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fileNeutral = adoptedNeutral (header);
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const Chromaticities acesChr = acesChromaticities();
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V2f acesNeutral = acesChr.white;
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if (fileChr.red == acesChr.red &&
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fileChr.green == acesChr.green &&
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fileChr.blue == acesChr.blue &&
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fileChr.white == acesChr.white &&
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fileNeutral == acesNeutral)
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{
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//
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// The file already contains ACES data,
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// color conversion is not necessary.
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return;
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}
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mustConvertColor = true;
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minX = header.dataWindow().min.x;
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maxX = header.dataWindow().max.x;
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//
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// Create a matrix that transforms colors from the
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// RGB space of the input file into the ACES space
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// using a color adaptation transform to move the
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// white point.
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//
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//
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// We'll need the Bradford cone primary matrix and its inverse
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//
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static const M44f bradfordCPM
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(0.895100, -0.750200, 0.038900, 0.000000,
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0.266400, 1.713500, -0.068500, 0.000000,
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-0.161400, 0.036700, 1.029600, 0.000000,
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0.000000, 0.000000, 0.000000, 1.000000);
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const static M44f inverseBradfordCPM
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(0.986993, 0.432305, -0.008529, 0.000000,
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-0.147054, 0.518360, 0.040043, 0.000000,
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0.159963, 0.049291, 0.968487, 0.000000,
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0.000000, 0.000000, 0.000000, 1.000000);
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//
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// Convert the white points of the two RGB spaces to XYZ
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//
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float fx = fileNeutral.x;
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float fy = fileNeutral.y;
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V3f fileNeutralXYZ (fx / fy, 1, (1 - fx - fy) / fy);
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float ax = acesNeutral.x;
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float ay = acesNeutral.y;
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V3f acesNeutralXYZ (ax / ay, 1, (1 - ax - ay) / ay);
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//
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// Compute the Bradford transformation matrix
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//
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V3f ratio ((acesNeutralXYZ * bradfordCPM) /
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(fileNeutralXYZ * bradfordCPM));
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M44f ratioMat (ratio[0], 0, 0, 0,
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0, ratio[1], 0, 0,
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0, 0, ratio[2], 0,
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0, 0, 0, 1);
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M44f bradfordTrans = bradfordCPM *
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ratioMat *
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inverseBradfordCPM;
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//
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// Build a combined file-RGB-to-ACES-RGB conversion matrix
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//
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fileToAces = RGBtoXYZ (fileChr, 1) * bradfordTrans * XYZtoRGB (acesChr, 1);
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}
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AcesInputFile::AcesInputFile (const std::string &name, int numThreads):
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_data (new Data)
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{
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_data->rgbaFile = new RgbaInputFile (name.c_str(), numThreads);
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_data->initColorConversion();
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}
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AcesInputFile::AcesInputFile (IStream &is, int numThreads):
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_data (new Data)
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{
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_data->rgbaFile = new RgbaInputFile (is, numThreads);
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_data->initColorConversion();
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}
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AcesInputFile::~AcesInputFile ()
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{
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delete _data;
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}
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void
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AcesInputFile::setFrameBuffer (Rgba *base, size_t xStride, size_t yStride)
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{
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_data->rgbaFile->setFrameBuffer (base, xStride, yStride);
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_data->fbBase = base;
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_data->fbXStride = xStride;
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_data->fbYStride = yStride;
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}
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void
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AcesInputFile::readPixels (int scanLine1, int scanLine2)
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{
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//
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// Copy the pixels from the RgbaInputFile into the frame buffer.
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//
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_data->rgbaFile->readPixels (scanLine1, scanLine2);
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//
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// If the RGB space of the input file is not the same as the ACES
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// RGB space, then the pixels in the frame buffer must be transformed
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// into the ACES RGB space.
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//
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if (!_data->mustConvertColor)
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return;
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int minY = min (scanLine1, scanLine2);
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int maxY = max (scanLine1, scanLine2);
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for (int y = minY; y <= maxY; ++y)
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{
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Rgba *base = _data->fbBase +
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_data->fbXStride * _data->minX +
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_data->fbYStride * y;
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for (int x = _data->minX; x <= _data->maxX; ++x)
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{
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V3f aces = V3f (base->r, base->g, base->b) * _data->fileToAces;
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base->r = aces[0];
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base->g = aces[1];
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base->b = aces[2];
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base += _data->fbXStride;
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}
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}
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}
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void
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AcesInputFile::readPixels (int scanLine)
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{
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readPixels (scanLine, scanLine);
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}
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const Header &
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AcesInputFile::header () const
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{
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return _data->rgbaFile->header();
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}
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const Imath::Box2i &
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AcesInputFile::displayWindow () const
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{
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return _data->rgbaFile->displayWindow();
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}
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const Imath::Box2i &
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AcesInputFile::dataWindow () const
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{
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return _data->rgbaFile->dataWindow();
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}
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float
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AcesInputFile::pixelAspectRatio () const
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{
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return _data->rgbaFile->pixelAspectRatio();
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}
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const Imath::V2f
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AcesInputFile::screenWindowCenter () const
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{
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return _data->rgbaFile->screenWindowCenter();
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}
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float
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AcesInputFile::screenWindowWidth () const
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{
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return _data->rgbaFile->screenWindowWidth();
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}
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LineOrder
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AcesInputFile::lineOrder () const
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{
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return _data->rgbaFile->lineOrder();
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}
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Compression
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AcesInputFile::compression () const
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{
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return _data->rgbaFile->compression();
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}
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RgbaChannels
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AcesInputFile::channels () const
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{
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return _data->rgbaFile->channels();
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}
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const char *
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AcesInputFile::fileName () const
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{
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return _data->rgbaFile->fileName();
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}
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bool
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AcesInputFile::isComplete () const
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{
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return _data->rgbaFile->isComplete();
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}
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int
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AcesInputFile::version () const
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{
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return _data->rgbaFile->version();
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}
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} // namespace Imf
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