216 lines
7.9 KiB
C
216 lines
7.9 KiB
C
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//
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// SPDX-License-Identifier: BSD-3-Clause
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// Copyright (c) Contributors to the OpenEXR Project.
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//
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#ifndef INCLUDED_IMF_DEEP_SCAN_LINE_OUTPUT_FILE_H
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#define INCLUDED_IMF_DEEP_SCAN_LINE_OUTPUT_FILE_H
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//-----------------------------------------------------------------------------
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//
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// class DeepScanLineOutputFile
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//
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//-----------------------------------------------------------------------------
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#include "ImfExport.h"
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#include "ImfForward.h"
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#include "ImfFrameBuffer.h"
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#include "ImfGenericOutputFile.h"
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#include "ImfHeader.h"
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#include "ImfNamespace.h"
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#include "ImfThreading.h"
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OPENEXR_IMF_INTERNAL_NAMESPACE_HEADER_ENTER
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struct PreviewRgba;
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class DeepScanLineOutputFile : public GenericOutputFile
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{
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public:
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//-----------------------------------------------------------
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// Constructor -- opens the file and writes the file header.
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// The file header is also copied into the DeepScanLineOutputFile
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// object, and can later be accessed via the header() method.
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// Destroying this DeepScanLineOutputFile object automatically closes
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// the file.
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//
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// numThreads determines the number of threads that will be
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// used to write the file (see ImfThreading.h).
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//-----------------------------------------------------------
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IMF_EXPORT
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DeepScanLineOutputFile (
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const char fileName[],
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const Header& header,
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int numThreads = globalThreadCount ());
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//------------------------------------------------------------
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// Constructor -- attaches the new DeepScanLineOutputFile object
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// to a file that has already been opened, and writes the file header.
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// The file header is also copied into the DeepScanLineOutputFile
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// object, and can later be accessed via the header() method.
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// Destroying this DeepScanLineOutputFile object does not automatically
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// close the file.
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//
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// numThreads determines the number of threads that will be
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// used to write the file (see ImfThreading.h).
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//------------------------------------------------------------
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IMF_EXPORT
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DeepScanLineOutputFile (
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OPENEXR_IMF_INTERNAL_NAMESPACE::OStream& os,
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const Header& header,
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int numThreads = globalThreadCount ());
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//-------------------------------------------------
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// Destructor
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//
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// Destroying the DeepScanLineOutputFile object
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// before writing all scan lines within the data
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// window results in an incomplete file.
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//-------------------------------------------------
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IMF_EXPORT
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virtual ~DeepScanLineOutputFile ();
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//------------------------
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// Access to the file name
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//------------------------
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IMF_EXPORT
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const char* fileName () const;
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//--------------------------
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// Access to the file header
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//--------------------------
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IMF_EXPORT
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const Header& header () const;
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//-------------------------------------------------------
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// Set the current frame buffer -- copies the FrameBuffer
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// object into the OutputFile object.
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//
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// The current frame buffer is the source of the pixel
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// data written to the file. The current frame buffer
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// must be set at least once before writePixels() is
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// called. The current frame buffer can be changed
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// after each call to writePixels.
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//-------------------------------------------------------
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IMF_EXPORT
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void setFrameBuffer (const DeepFrameBuffer& frameBuffer);
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//-----------------------------------
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// Access to the current frame buffer
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//-----------------------------------
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IMF_EXPORT
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const DeepFrameBuffer& frameBuffer () const;
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//-------------------------------------------------------------------
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// Write pixel data:
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//
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// writePixels(n) retrieves the next n scan lines worth of data from
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// the current frame buffer, starting with the scan line indicated by
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// currentScanLine(), and stores the data in the output file, and
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// progressing in the direction indicated by header.lineOrder().
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//
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// To produce a complete and correct file, exactly m scan lines must
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// be written, where m is equal to
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// header().dataWindow().max.y - header().dataWindow().min.y + 1.
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//-------------------------------------------------------------------
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IMF_EXPORT
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void writePixels (int numScanLines = 1);
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//------------------------------------------------------------------
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// Access to the current scan line:
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//
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// currentScanLine() returns the y coordinate of the first scan line
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// that will be read from the current frame buffer during the next
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// call to writePixels().
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//
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// If header.lineOrder() == INCREASING_Y:
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//
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// The current scan line before the first call to writePixels()
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// is header().dataWindow().min.y. After writing each scan line,
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// the current scan line is incremented by 1.
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//
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// If header.lineOrder() == DECREASING_Y:
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//
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// The current scan line before the first call to writePixels()
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// is header().dataWindow().max.y. After writing each scan line,
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// the current scan line is decremented by 1.
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//
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//------------------------------------------------------------------
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IMF_EXPORT
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int currentScanLine () const;
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//--------------------------------------------------------------
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// Shortcut to copy all pixels from an InputFile into this file,
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// without uncompressing and then recompressing the pixel data.
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// This file's header must be compatible with the InputFile's
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// header: The two header's "dataWindow", "compression",
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// "lineOrder" and "channels" attributes must be the same.
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//--------------------------------------------------------------
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IMF_EXPORT
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void copyPixels (DeepScanLineInputFile& in);
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// --------------------------------------------------------------
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// Shortcut to copy pixels from a given part of a multipart file
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// --------------------------------------------------------------
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IMF_EXPORT
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void copyPixels (DeepScanLineInputPart& in);
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//--------------------------------------------------------------
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// Updating the preview image:
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//
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// updatePreviewImage() supplies a new set of pixels for the
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// preview image attribute in the file's header. If the header
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// does not contain a preview image, updatePreviewImage() throws
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// an IEX_NAMESPACE::LogicExc.
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//
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// Note: updatePreviewImage() is necessary because images are
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// often stored in a file incrementally, a few scan lines at a
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// time, while the image is being generated. Since the preview
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// image is an attribute in the file's header, it gets stored in
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// the file as soon as the file is opened, but we may not know
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// what the preview image should look like until we have written
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// the last scan line of the main image.
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//
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//--------------------------------------------------------------
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IMF_EXPORT
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void updatePreviewImage (const PreviewRgba newPixels[]);
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struct Data;
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private:
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//------------------------------------------------------------
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// Constructor -- attaches the OutputStreamMutex to the
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// given one from MultiPartOutputFile. Set the previewPosition
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// and lineOffsetsPosition which have been acquired from
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// the constructor of MultiPartOutputFile as well.
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//------------------------------------------------------------
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DeepScanLineOutputFile (const OutputPartData* part);
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DeepScanLineOutputFile (const DeepScanLineOutputFile&) = delete;
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DeepScanLineOutputFile& operator= (const DeepScanLineOutputFile&) = delete;
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DeepScanLineOutputFile (DeepScanLineOutputFile&&) = delete;
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DeepScanLineOutputFile& operator= (DeepScanLineOutputFile&&) = delete;
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void initialize (const Header& header);
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void initializeLineBuffer ();
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Data* _data;
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friend class MultiPartOutputFile;
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};
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OPENEXR_IMF_INTERNAL_NAMESPACE_HEADER_EXIT
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#endif
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