323 lines
10 KiB
C
323 lines
10 KiB
C
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///////////////////////////////////////////////////////////////////////////
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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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#ifndef INCLUDED_IMF_ACES_FILE_H
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#define INCLUDED_IMF_ACES_FILE_H
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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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// This header file declares two classes that directly support
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// image file input and output according to the Academy Image
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// Interchange Framework.
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//
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// The Academy Image Interchange file format is a subset of OpenEXR:
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//
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// - Images are stored as scanlines. Tiles are not allowed.
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//
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// - Images contain three color channels, either
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// R, G, B (red, green, blue) or
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// Y, RY, BY (luminance, sub-sampled chroma)
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//
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// - Images may optionally contain an alpha channel.
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//
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// - Only three compression types are allowed:
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// - NO_COMPRESSION (file is not compressed)
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// - PIZ_COMPRESSION (lossless)
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// - B44A_COMPRESSION (lossy)
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//
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// - The "chromaticities" header attribute must specify
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// the ACES RGB primaries and white point.
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//
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// class AcesOutputFile writes an OpenEXR file, enforcing the
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// restrictions listed above. Pixel data supplied by application
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// software must already be in the ACES RGB space.
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//
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// class AcesInputFile reads an OpenEXR file. Pixel data delivered
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// to application software is guaranteed to be in the ACES RGB space.
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// If the RGB space of the file is not the same as the ACES space,
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// then the pixels are automatically converted: the pixels are
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// converted to CIE XYZ, a color adaptation transform shifts the
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// white point, and the result is converted to ACES RGB.
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//
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//-----------------------------------------------------------------------------
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#include <ImfHeader.h>
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#include <ImfRgba.h>
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#include "ImathVec.h"
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#include "ImathBox.h"
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#include <ImfThreading.h>
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#include <string>
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namespace Imf {
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class RgbaOutputFile;
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class RgbaInputFile;
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struct PreviewRgba;
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class Chromaticities;
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//
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// ACES red, green, blue and white-point chromaticities.
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//
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const Chromaticities & acesChromaticities ();
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//
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// ACES output file.
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//
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class AcesOutputFile
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{
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public:
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//---------------------------------------------------
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// Constructor -- header is constructed by the caller
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//---------------------------------------------------
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AcesOutputFile (const std::string &name,
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const Header &header,
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RgbaChannels rgbaChannels = WRITE_RGBA,
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int numThreads = globalThreadCount());
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//----------------------------------------------------
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// Constructor -- header is constructed by the caller,
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// file is opened by the caller, destructor will not
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// automatically close the file.
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//----------------------------------------------------
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AcesOutputFile (OStream &os,
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const Header &header,
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RgbaChannels rgbaChannels = WRITE_RGBA,
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int numThreads = globalThreadCount());
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//----------------------------------------------------------------
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// Constructor -- header data are explicitly specified as function
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// call arguments (empty dataWindow means "same as displayWindow")
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//----------------------------------------------------------------
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AcesOutputFile (const std::string &name,
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const Imath::Box2i &displayWindow,
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const Imath::Box2i &dataWindow = Imath::Box2i(),
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RgbaChannels rgbaChannels = WRITE_RGBA,
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float pixelAspectRatio = 1,
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const Imath::V2f screenWindowCenter = Imath::V2f (0, 0),
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float screenWindowWidth = 1,
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LineOrder lineOrder = INCREASING_Y,
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Compression compression = PIZ_COMPRESSION,
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int numThreads = globalThreadCount());
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//-----------------------------------------------
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// Constructor -- like the previous one, but both
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// the display window and the data window are
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// Box2i (V2i (0, 0), V2i (width - 1, height -1))
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//-----------------------------------------------
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AcesOutputFile (const std::string &name,
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int width,
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int height,
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RgbaChannels rgbaChannels = WRITE_RGBA,
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float pixelAspectRatio = 1,
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const Imath::V2f screenWindowCenter = Imath::V2f (0, 0),
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float screenWindowWidth = 1,
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LineOrder lineOrder = INCREASING_Y,
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Compression compression = PIZ_COMPRESSION,
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int numThreads = globalThreadCount());
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//-----------
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// Destructor
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//-----------
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virtual ~AcesOutputFile ();
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//------------------------------------------------
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// Define a frame buffer as the pixel data source:
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// Pixel (x, y) is at address
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//
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// base + x * xStride + y * yStride
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//
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//------------------------------------------------
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void setFrameBuffer (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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// Write pixel data (see class Imf::OutputFile)
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// The pixels are assumed to contain ACES RGB data.
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//-------------------------------------------------
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void writePixels (int numScanLines = 1);
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int currentScanLine () const;
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//--------------------------
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// Access to the file header
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//--------------------------
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const Header & header () const;
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const Imath::Box2i & displayWindow () const;
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const Imath::Box2i & dataWindow () const;
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float pixelAspectRatio () const;
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const Imath::V2f screenWindowCenter () const;
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float screenWindowWidth () const;
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LineOrder lineOrder () const;
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Compression compression () const;
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RgbaChannels channels () const;
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// --------------------------------------------------------------------
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// Update the preview image (see Imf::OutputFile::updatePreviewImage())
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// --------------------------------------------------------------------
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void updatePreviewImage (const PreviewRgba[]);
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private:
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AcesOutputFile (const AcesOutputFile &); // not implemented
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AcesOutputFile & operator = (const AcesOutputFile &); // not implemented
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class Data;
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Data * _data;
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};
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//
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// ACES input file
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//
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class AcesInputFile
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{
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public:
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//-------------------------------------------------------
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// Constructor -- opens the file with the specified name,
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// destructor will automatically close the file.
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//-------------------------------------------------------
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AcesInputFile (const std::string &name,
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int numThreads = globalThreadCount());
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//-----------------------------------------------------------
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// Constructor -- attaches the new AcesInputFile object to a
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// file that has already been opened by the caller.
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// Destroying the AcesInputFile object will not automatically
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// close the file.
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//-----------------------------------------------------------
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AcesInputFile (IStream &is,
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int numThreads = globalThreadCount());
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//-----------
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// Destructor
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//-----------
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virtual ~AcesInputFile ();
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//-----------------------------------------------------
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// Define a frame buffer as the pixel data destination:
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// Pixel (x, y) is at address
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//
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// base + x * xStride + y * yStride
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//
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//-----------------------------------------------------
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void setFrameBuffer (Rgba *base,
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size_t xStride,
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size_t yStride);
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//--------------------------------------------
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// Read pixel data (see class Imf::InputFile)
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// Pixels returned will contain ACES RGB data.
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//--------------------------------------------
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void readPixels (int scanLine1, int scanLine2);
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void readPixels (int scanLine);
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//--------------------------
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// Access to the file header
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//--------------------------
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const Header & header () const;
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const Imath::Box2i & displayWindow () const;
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const Imath::Box2i & dataWindow () const;
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float pixelAspectRatio () const;
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const Imath::V2f screenWindowCenter () const;
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float screenWindowWidth () const;
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LineOrder lineOrder () const;
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Compression compression () const;
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RgbaChannels channels () const;
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const char * fileName () const;
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bool isComplete () const;
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//----------------------------------
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// Access to the file format version
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//----------------------------------
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int version () const;
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private:
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AcesInputFile (const AcesInputFile &); // not implemented
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AcesInputFile & operator = (const AcesInputFile &); // not implemented
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class Data;
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Data * _data;
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};
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} // namespace Imf
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#endif
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