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1289 lines
35 KiB
C++
1289 lines
35 KiB
C++
///////////////////////////////////////////////////////////////////////////
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//
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// Copyright (c) 2004, 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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// class OutputFile
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//
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//-----------------------------------------------------------------------------
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#include <ImfOutputFile.h>
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#include <ImfInputFile.h>
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#include <ImfChannelList.h>
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#include <ImfMisc.h>
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#include <ImfStdIO.h>
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#include <ImfCompressor.h>
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#include "ImathBox.h"
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#include "ImathFun.h"
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#include <ImfArray.h>
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#include <ImfXdr.h>
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#include <ImfPreviewImageAttribute.h>
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#include "IlmThreadPool.h"
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#include "IlmThreadSemaphore.h"
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#include "IlmThreadMutex.h"
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#include "Iex.h"
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#include <string>
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#include <vector>
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#include <fstream>
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#include <assert.h>
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#include <algorithm> // for std::max()
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namespace Imf {
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using Imath::Box2i;
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using Imath::divp;
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using Imath::modp;
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using std::string;
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using std::vector;
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using std::ofstream;
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using std::min;
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using std::max;
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using IlmThread::Mutex;
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using IlmThread::Lock;
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using IlmThread::Semaphore;
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using IlmThread::Task;
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using IlmThread::TaskGroup;
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using IlmThread::ThreadPool;
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namespace {
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struct OutSliceInfo
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{
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PixelType type;
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const char * base;
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size_t xStride;
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size_t yStride;
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int xSampling;
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int ySampling;
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bool zero;
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OutSliceInfo (PixelType type = HALF,
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const char *base = 0,
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size_t xStride = 0,
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size_t yStride = 0,
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int xSampling = 1,
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int ySampling = 1,
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bool zero = false);
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};
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OutSliceInfo::OutSliceInfo (PixelType t,
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const char *b,
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size_t xs, size_t ys,
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int xsm, int ysm,
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bool z)
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:
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type (t),
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base (b),
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xStride (xs),
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yStride (ys),
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xSampling (xsm),
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ySampling (ysm),
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zero (z)
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{
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// empty
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}
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struct LineBuffer
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{
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Array<char> buffer;
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const char * dataPtr;
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int dataSize;
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char * endOfLineBufferData;
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int minY;
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int maxY;
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int scanLineMin;
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int scanLineMax;
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Compressor * compressor;
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bool partiallyFull; // has incomplete data
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bool hasException;
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string exception;
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LineBuffer (Compressor *comp);
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~LineBuffer ();
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void wait () {_sem.wait();}
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void post () {_sem.post();}
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private:
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Semaphore _sem;
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};
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LineBuffer::LineBuffer (Compressor *comp) :
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dataPtr (0),
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dataSize (0),
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compressor (comp),
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partiallyFull (false),
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hasException (false),
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exception (),
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_sem (1)
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{
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// empty
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}
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LineBuffer::~LineBuffer ()
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{
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delete compressor;
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}
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} // namespace
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struct OutputFile::Data: public Mutex
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{
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Header header; // the image header
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int version; // file format version
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Int64 previewPosition; // file position for preview
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FrameBuffer frameBuffer; // framebuffer to write into
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int currentScanLine; // next scanline to be written
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int missingScanLines; // number of lines to write
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LineOrder lineOrder; // the file's lineorder
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int minX; // data window's min x coord
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int maxX; // data window's max x coord
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int minY; // data window's min y coord
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int maxY; // data window's max x coord
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vector<Int64> lineOffsets; // stores offsets in file for
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// each scanline
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vector<size_t> bytesPerLine; // combined size of a line over
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// all channels
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vector<size_t> offsetInLineBuffer; // offset for each scanline in
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// its linebuffer
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Compressor::Format format; // compressor's data format
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vector<OutSliceInfo> slices; // info about channels in file
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OStream * os; // file stream to write to
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bool deleteStream;
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Int64 lineOffsetsPosition; // file position for line
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// offset table
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Int64 currentPosition; // current file position
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vector<LineBuffer*> lineBuffers; // each holds one line buffer
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int linesInBuffer; // number of scanlines each
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// buffer holds
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size_t lineBufferSize; // size of the line buffer
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Data (bool deleteStream, int numThreads);
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~Data ();
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inline LineBuffer * getLineBuffer (int number); // hash function from line
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// buffer indices into our
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// vector of line buffers
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};
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OutputFile::Data::Data (bool deleteStream, int numThreads):
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os (0),
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deleteStream (deleteStream),
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lineOffsetsPosition (0)
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{
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//
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// We need at least one lineBuffer, but if threading is used,
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// to keep n threads busy we need 2*n lineBuffers.
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//
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lineBuffers.resize (max (1, 2 * numThreads));
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}
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OutputFile::Data::~Data ()
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{
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if (deleteStream)
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delete os;
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for (size_t i = 0; i < lineBuffers.size(); i++)
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delete lineBuffers[i];
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}
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LineBuffer*
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OutputFile::Data::getLineBuffer (int number)
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{
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return lineBuffers[number % lineBuffers.size()];
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}
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namespace {
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Int64
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writeLineOffsets (OStream &os, const vector<Int64> &lineOffsets)
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{
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Int64 pos = os.tellp();
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if (pos == -1)
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Iex::throwErrnoExc ("Cannot determine current file position (%T).");
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for (unsigned int i = 0; i < lineOffsets.size(); i++)
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Xdr::write <StreamIO> (os, lineOffsets[i]);
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return pos;
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}
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void
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writePixelData (OutputFile::Data *ofd,
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int lineBufferMinY,
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const char pixelData[],
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int pixelDataSize)
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{
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//
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// Store a block of pixel data in the output file, and try
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// to keep track of the current writing position the file
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// without calling tellp() (tellp() can be fairly expensive).
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//
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Int64 currentPosition = ofd->currentPosition;
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ofd->currentPosition = 0;
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if (currentPosition == 0)
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currentPosition = ofd->os->tellp();
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ofd->lineOffsets[(ofd->currentScanLine - ofd->minY) / ofd->linesInBuffer] =
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currentPosition;
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#ifdef DEBUG
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assert (ofd->os->tellp() == currentPosition);
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#endif
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Xdr::write <StreamIO> (*ofd->os, lineBufferMinY);
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Xdr::write <StreamIO> (*ofd->os, pixelDataSize);
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ofd->os->write (pixelData, pixelDataSize);
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ofd->currentPosition = currentPosition +
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Xdr::size<int>() +
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Xdr::size<int>() +
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pixelDataSize;
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}
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inline void
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writePixelData (OutputFile::Data *ofd, const LineBuffer *lineBuffer)
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{
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writePixelData (ofd,
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lineBuffer->minY,
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lineBuffer->dataPtr,
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lineBuffer->dataSize);
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}
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void
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convertToXdr (OutputFile::Data *ofd,
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Array<char> &lineBuffer,
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int lineBufferMinY,
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int lineBufferMaxY,
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int /*inSize*/)
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{
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//
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// Convert the contents of a lineBuffer from the machine's native
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// representation to Xdr format. This function is called by
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// CompressLineBuffer::execute(), below, if the compressor wanted
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// its input pixel data in the machine's native format, but then
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// failed to compress the data (most compressors will expand rather
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// than compress random input data).
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//
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// Note that this routine assumes that the machine's native
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// representation of the pixel data has the same size as the
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// Xdr representation. This makes it possible to convert the
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// pixel data in place, without an intermediate temporary buffer.
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//
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int startY, endY; // The first and last scanlines in
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// the file that are in the lineBuffer.
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int step;
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if (ofd->lineOrder == INCREASING_Y)
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{
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startY = max (lineBufferMinY, ofd->minY);
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endY = min (lineBufferMaxY, ofd->maxY) + 1;
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step = 1;
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}
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else
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{
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startY = min (lineBufferMaxY, ofd->maxY);
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endY = max (lineBufferMinY, ofd->minY) - 1;
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step = -1;
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}
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//
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// Iterate over all scanlines in the lineBuffer to convert.
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//
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for (int y = startY; y != endY; y += step)
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{
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//
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// Set these to point to the start of line y.
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// We will write to writePtr from readPtr.
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//
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char *writePtr = lineBuffer + ofd->offsetInLineBuffer[y - ofd->minY];
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const char *readPtr = writePtr;
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//
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// Iterate over all slices in the file.
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//
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for (unsigned int i = 0; i < ofd->slices.size(); ++i)
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{
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//
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// Test if scan line y of this channel is
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// contains any data (the scan line contains
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// data only if y % ySampling == 0).
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//
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const OutSliceInfo &slice = ofd->slices[i];
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if (modp (y, slice.ySampling) != 0)
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continue;
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//
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// Find the number of sampled pixels, dMaxX-dMinX+1, for
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// slice i in scan line y (i.e. pixels within the data window
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// for which x % xSampling == 0).
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//
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int dMinX = divp (ofd->minX, slice.xSampling);
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int dMaxX = divp (ofd->maxX, slice.xSampling);
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//
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// Convert the samples in place.
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//
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convertInPlace (writePtr, readPtr, slice.type, dMaxX - dMinX + 1);
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}
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}
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}
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//
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// A LineBufferTask encapsulates the task of copying a set of scanlines
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// from the user's frame buffer into a LineBuffer object, compressing
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// the data if necessary.
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//
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class LineBufferTask: public Task
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{
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public:
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LineBufferTask (TaskGroup *group,
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OutputFile::Data *ofd,
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int number,
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int scanLineMin,
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int scanLineMax);
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virtual ~LineBufferTask ();
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virtual void execute ();
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private:
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OutputFile::Data * _ofd;
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LineBuffer * _lineBuffer;
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};
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LineBufferTask::LineBufferTask
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(TaskGroup *group,
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OutputFile::Data *ofd,
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int number,
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int scanLineMin,
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int scanLineMax)
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:
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Task (group),
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_ofd (ofd),
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_lineBuffer (_ofd->getLineBuffer(number))
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{
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//
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// Wait for the lineBuffer to become available
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//
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_lineBuffer->wait ();
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//
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// Initialize the lineBuffer data if necessary
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//
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if (!_lineBuffer->partiallyFull)
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{
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_lineBuffer->endOfLineBufferData = _lineBuffer->buffer;
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_lineBuffer->minY = _ofd->minY + number * _ofd->linesInBuffer;
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_lineBuffer->maxY = min (_lineBuffer->minY + _ofd->linesInBuffer - 1,
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_ofd->maxY);
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_lineBuffer->partiallyFull = true;
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}
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_lineBuffer->scanLineMin = max (_lineBuffer->minY, scanLineMin);
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_lineBuffer->scanLineMax = min (_lineBuffer->maxY, scanLineMax);
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}
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LineBufferTask::~LineBufferTask ()
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{
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//
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// Signal that the line buffer is now free
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//
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_lineBuffer->post ();
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}
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void
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LineBufferTask::execute ()
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{
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try
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{
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//
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// First copy the pixel data from the
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// frame buffer into the line buffer
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//
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int yStart, yStop, dy;
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if (_ofd->lineOrder == INCREASING_Y)
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{
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yStart = _lineBuffer->scanLineMin;
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yStop = _lineBuffer->scanLineMax + 1;
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dy = 1;
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}
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else
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{
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yStart = _lineBuffer->scanLineMax;
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yStop = _lineBuffer->scanLineMin - 1;
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dy = -1;
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}
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int y;
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for (y = yStart; y != yStop; y += dy)
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{
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//
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// Gather one scan line's worth of pixel data and store
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// them in _ofd->lineBuffer.
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//
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char *writePtr = _lineBuffer->buffer +
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_ofd->offsetInLineBuffer[y - _ofd->minY];
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//
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// Iterate over all image channels.
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//
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for (unsigned int i = 0; i < _ofd->slices.size(); ++i)
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{
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//
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// Test if scan line y of this channel contains any data
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// (the scan line contains data only if y % ySampling == 0).
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//
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const OutSliceInfo &slice = _ofd->slices[i];
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if (modp (y, slice.ySampling) != 0)
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continue;
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//
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// Find the x coordinates of the leftmost and rightmost
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// sampled pixels (i.e. pixels within the data window
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// for which x % xSampling == 0).
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//
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int dMinX = divp (_ofd->minX, slice.xSampling);
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int dMaxX = divp (_ofd->maxX, slice.xSampling);
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//
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// Fill the line buffer with with pixel data.
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//
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if (slice.zero)
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{
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//
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// The frame buffer contains no data for this channel.
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// Store zeroes in _lineBuffer->buffer.
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//
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fillChannelWithZeroes (writePtr, _ofd->format, slice.type,
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dMaxX - dMinX + 1);
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}
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else
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{
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//
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// If necessary, convert the pixel data to Xdr format.
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// Then store the pixel data in _ofd->lineBuffer.
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//
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const char *linePtr = slice.base +
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divp (y, slice.ySampling) *
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slice.yStride;
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const char *readPtr = linePtr + dMinX * slice.xStride;
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const char *endPtr = linePtr + dMaxX * slice.xStride;
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copyFromFrameBuffer (writePtr, readPtr, endPtr,
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slice.xStride, _ofd->format,
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slice.type);
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}
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}
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if (_lineBuffer->endOfLineBufferData < writePtr)
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_lineBuffer->endOfLineBufferData = writePtr;
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#ifdef DEBUG
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assert (writePtr - (_lineBuffer->buffer +
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_ofd->offsetInLineBuffer[y - _ofd->minY]) ==
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(int) _ofd->bytesPerLine[y - _ofd->minY]);
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#endif
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}
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//
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// If the next scanline isn't past the bounds of the lineBuffer
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// then we are done, otherwise compress the linebuffer
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//
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if (y >= _lineBuffer->minY && y <= _lineBuffer->maxY)
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return;
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_lineBuffer->dataPtr = _lineBuffer->buffer;
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_lineBuffer->dataSize = _lineBuffer->endOfLineBufferData -
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_lineBuffer->buffer;
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//
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// Compress the data
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//
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|
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Compressor *compressor = _lineBuffer->compressor;
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|
|
if (compressor)
|
|
{
|
|
const char *compPtr;
|
|
|
|
int compSize = compressor->compress (_lineBuffer->dataPtr,
|
|
_lineBuffer->dataSize,
|
|
_lineBuffer->minY, compPtr);
|
|
|
|
if (compSize < _lineBuffer->dataSize)
|
|
{
|
|
_lineBuffer->dataSize = compSize;
|
|
_lineBuffer->dataPtr = compPtr;
|
|
}
|
|
else if (_ofd->format == Compressor::NATIVE)
|
|
{
|
|
//
|
|
// The data did not shrink during compression, but
|
|
// we cannot write to the file using the machine's
|
|
// native format, so we need to convert the lineBuffer
|
|
// to Xdr.
|
|
//
|
|
|
|
convertToXdr (_ofd, _lineBuffer->buffer, _lineBuffer->minY,
|
|
_lineBuffer->maxY, _lineBuffer->dataSize);
|
|
}
|
|
}
|
|
|
|
_lineBuffer->partiallyFull = false;
|
|
}
|
|
catch (std::exception &e)
|
|
{
|
|
if (!_lineBuffer->hasException)
|
|
{
|
|
_lineBuffer->exception = e.what ();
|
|
_lineBuffer->hasException = true;
|
|
}
|
|
}
|
|
catch (...)
|
|
{
|
|
if (!_lineBuffer->hasException)
|
|
{
|
|
_lineBuffer->exception = "unrecognized exception";
|
|
_lineBuffer->hasException = true;
|
|
}
|
|
}
|
|
}
|
|
|
|
} // namespace
|
|
|
|
|
|
OutputFile::OutputFile
|
|
(const char fileName[],
|
|
const Header &header,
|
|
int numThreads)
|
|
:
|
|
_data (new Data (true, numThreads))
|
|
{
|
|
try
|
|
{
|
|
header.sanityCheck();
|
|
_data->os = new StdOFStream (fileName);
|
|
initialize (header);
|
|
}
|
|
catch (Iex::BaseExc &e)
|
|
{
|
|
delete _data;
|
|
|
|
REPLACE_EXC (e, "Cannot open image file "
|
|
"\"" << fileName << "\". " << e);
|
|
throw;
|
|
}
|
|
catch (...)
|
|
{
|
|
delete _data;
|
|
throw;
|
|
}
|
|
}
|
|
|
|
|
|
OutputFile::OutputFile
|
|
(OStream &os,
|
|
const Header &header,
|
|
int numThreads)
|
|
:
|
|
_data (new Data (false, numThreads))
|
|
{
|
|
try
|
|
{
|
|
header.sanityCheck();
|
|
_data->os = &os;
|
|
initialize (header);
|
|
}
|
|
catch (Iex::BaseExc &e)
|
|
{
|
|
delete _data;
|
|
|
|
REPLACE_EXC (e, "Cannot open image file "
|
|
"\"" << os.fileName() << "\". " << e);
|
|
throw;
|
|
}
|
|
catch (...)
|
|
{
|
|
delete _data;
|
|
throw;
|
|
}
|
|
}
|
|
|
|
|
|
void
|
|
OutputFile::initialize (const Header &header)
|
|
{
|
|
_data->header = header;
|
|
|
|
const Box2i &dataWindow = header.dataWindow();
|
|
|
|
_data->currentScanLine = (header.lineOrder() == INCREASING_Y)?
|
|
dataWindow.min.y: dataWindow.max.y;
|
|
|
|
_data->missingScanLines = dataWindow.max.y - dataWindow.min.y + 1;
|
|
_data->lineOrder = header.lineOrder();
|
|
_data->minX = dataWindow.min.x;
|
|
_data->maxX = dataWindow.max.x;
|
|
_data->minY = dataWindow.min.y;
|
|
_data->maxY = dataWindow.max.y;
|
|
|
|
size_t maxBytesPerLine = bytesPerLineTable (_data->header,
|
|
_data->bytesPerLine);
|
|
|
|
for (size_t i = 0; i < _data->lineBuffers.size(); ++i)
|
|
{
|
|
_data->lineBuffers[i] =
|
|
new LineBuffer (newCompressor (_data->header.compression(),
|
|
maxBytesPerLine,
|
|
_data->header));
|
|
}
|
|
|
|
LineBuffer *lineBuffer = _data->lineBuffers[0];
|
|
_data->format = defaultFormat (lineBuffer->compressor);
|
|
_data->linesInBuffer = numLinesInBuffer (lineBuffer->compressor);
|
|
_data->lineBufferSize = maxBytesPerLine * _data->linesInBuffer;
|
|
|
|
for (size_t i = 0; i < _data->lineBuffers.size(); i++)
|
|
_data->lineBuffers[i]->buffer.resizeErase(_data->lineBufferSize);
|
|
|
|
int lineOffsetSize = (dataWindow.max.y - dataWindow.min.y +
|
|
_data->linesInBuffer) / _data->linesInBuffer;
|
|
|
|
_data->lineOffsets.resize (lineOffsetSize);
|
|
|
|
offsetInLineBufferTable (_data->bytesPerLine,
|
|
_data->linesInBuffer,
|
|
_data->offsetInLineBuffer);
|
|
|
|
_data->previewPosition =
|
|
_data->header.writeTo (*_data->os);
|
|
|
|
_data->lineOffsetsPosition =
|
|
writeLineOffsets (*_data->os, _data->lineOffsets);
|
|
|
|
_data->currentPosition = _data->os->tellp();
|
|
}
|
|
|
|
|
|
OutputFile::~OutputFile ()
|
|
{
|
|
if (_data)
|
|
{
|
|
{
|
|
if (_data->lineOffsetsPosition > 0)
|
|
{
|
|
try
|
|
{
|
|
_data->os->seekp (_data->lineOffsetsPosition);
|
|
writeLineOffsets (*_data->os, _data->lineOffsets);
|
|
}
|
|
catch (...)
|
|
{
|
|
//
|
|
// We cannot safely throw any exceptions from here.
|
|
// This destructor may have been called because the
|
|
// stack is currently being unwound for another
|
|
// exception.
|
|
//
|
|
}
|
|
}
|
|
}
|
|
|
|
delete _data;
|
|
}
|
|
}
|
|
|
|
|
|
const char *
|
|
OutputFile::fileName () const
|
|
{
|
|
return _data->os->fileName();
|
|
}
|
|
|
|
|
|
const Header &
|
|
OutputFile::header () const
|
|
{
|
|
return _data->header;
|
|
}
|
|
|
|
|
|
void
|
|
OutputFile::setFrameBuffer (const FrameBuffer &frameBuffer)
|
|
{
|
|
Lock lock (*_data);
|
|
|
|
//
|
|
// Check if the new frame buffer descriptor
|
|
// is compatible with the image file header.
|
|
//
|
|
|
|
const ChannelList &channels = _data->header.channels();
|
|
|
|
for (ChannelList::ConstIterator i = channels.begin();
|
|
i != channels.end();
|
|
++i)
|
|
{
|
|
FrameBuffer::ConstIterator j = frameBuffer.find (i.name());
|
|
|
|
if (j == frameBuffer.end())
|
|
continue;
|
|
|
|
if (i.channel().type != j.slice().type)
|
|
{
|
|
THROW (Iex::ArgExc, "Pixel type of \"" << i.name() << "\" channel "
|
|
"of output file \"" << fileName() << "\" is "
|
|
"not compatible with the frame buffer's "
|
|
"pixel type.");
|
|
}
|
|
|
|
if (i.channel().xSampling != j.slice().xSampling ||
|
|
i.channel().ySampling != j.slice().ySampling)
|
|
{
|
|
THROW (Iex::ArgExc, "X and/or y subsampling factors "
|
|
"of \"" << i.name() << "\" channel "
|
|
"of output file \"" << fileName() << "\" are "
|
|
"not compatible with the frame buffer's "
|
|
"subsampling factors.");
|
|
}
|
|
}
|
|
|
|
//
|
|
// Initialize slice table for writePixels().
|
|
//
|
|
|
|
vector<OutSliceInfo> slices;
|
|
|
|
for (ChannelList::ConstIterator i = channels.begin();
|
|
i != channels.end();
|
|
++i)
|
|
{
|
|
FrameBuffer::ConstIterator j = frameBuffer.find (i.name());
|
|
|
|
if (j == frameBuffer.end())
|
|
{
|
|
//
|
|
// Channel i is not present in the frame buffer.
|
|
// In the file, channel i will contain only zeroes.
|
|
//
|
|
|
|
slices.push_back (OutSliceInfo (i.channel().type,
|
|
0, // base
|
|
0, // xStride,
|
|
0, // yStride,
|
|
i.channel().xSampling,
|
|
i.channel().ySampling,
|
|
true)); // zero
|
|
}
|
|
else
|
|
{
|
|
//
|
|
// Channel i is present in the frame buffer.
|
|
//
|
|
|
|
slices.push_back (OutSliceInfo (j.slice().type,
|
|
j.slice().base,
|
|
j.slice().xStride,
|
|
j.slice().yStride,
|
|
j.slice().xSampling,
|
|
j.slice().ySampling,
|
|
false)); // zero
|
|
}
|
|
}
|
|
|
|
//
|
|
// Store the new frame buffer.
|
|
//
|
|
|
|
_data->frameBuffer = frameBuffer;
|
|
_data->slices = slices;
|
|
}
|
|
|
|
|
|
const FrameBuffer &
|
|
OutputFile::frameBuffer () const
|
|
{
|
|
Lock lock (*_data);
|
|
return _data->frameBuffer;
|
|
}
|
|
|
|
|
|
void
|
|
OutputFile::writePixels (int numScanLines)
|
|
{
|
|
try
|
|
{
|
|
Lock lock (*_data);
|
|
|
|
if (_data->slices.size() == 0)
|
|
throw Iex::ArgExc ("No frame buffer specified "
|
|
"as pixel data source.");
|
|
|
|
//
|
|
// Maintain two iterators:
|
|
// nextWriteBuffer: next linebuffer to be written to the file
|
|
// nextCompressBuffer: next linebuffer to compress
|
|
//
|
|
|
|
int first = (_data->currentScanLine - _data->minY) /
|
|
_data->linesInBuffer;
|
|
|
|
int nextWriteBuffer = first;
|
|
int nextCompressBuffer;
|
|
int stop;
|
|
int step;
|
|
int scanLineMin;
|
|
int scanLineMax;
|
|
|
|
{
|
|
//
|
|
// Create a task group for all line buffer tasks. When the
|
|
// taskgroup goes out of scope, the destructor waits until
|
|
// all tasks are complete.
|
|
//
|
|
|
|
TaskGroup taskGroup;
|
|
|
|
//
|
|
// Determine the range of lineBuffers that intersect the scan
|
|
// line range. Then add the initial compression tasks to the
|
|
// thread pool. We always add in at least one task but the
|
|
// individual task might not do anything if numScanLines == 0.
|
|
//
|
|
|
|
if (_data->lineOrder == INCREASING_Y)
|
|
{
|
|
int last = (_data->currentScanLine + (numScanLines - 1) -
|
|
_data->minY) / _data->linesInBuffer;
|
|
|
|
scanLineMin = _data->currentScanLine;
|
|
scanLineMax = _data->currentScanLine + numScanLines - 1;
|
|
|
|
int numTasks = max (min ((int)_data->lineBuffers.size(),
|
|
last - first + 1),
|
|
1);
|
|
|
|
for (int i = 0; i < numTasks; i++)
|
|
{
|
|
ThreadPool::addGlobalTask
|
|
(new LineBufferTask (&taskGroup, _data, first + i,
|
|
scanLineMin, scanLineMax));
|
|
}
|
|
|
|
nextCompressBuffer = first + numTasks;
|
|
stop = last + 1;
|
|
step = 1;
|
|
}
|
|
else
|
|
{
|
|
int last = (_data->currentScanLine - (numScanLines - 1) -
|
|
_data->minY) / _data->linesInBuffer;
|
|
|
|
scanLineMax = _data->currentScanLine;
|
|
scanLineMin = _data->currentScanLine - numScanLines + 1;
|
|
|
|
int numTasks = max (min ((int)_data->lineBuffers.size(),
|
|
first - last + 1),
|
|
1);
|
|
|
|
for (int i = 0; i < numTasks; i++)
|
|
{
|
|
ThreadPool::addGlobalTask
|
|
(new LineBufferTask (&taskGroup, _data, first - i,
|
|
scanLineMin, scanLineMax));
|
|
}
|
|
|
|
nextCompressBuffer = first - numTasks;
|
|
stop = last - 1;
|
|
step = -1;
|
|
}
|
|
|
|
while (true)
|
|
{
|
|
if (_data->missingScanLines <= 0)
|
|
{
|
|
throw Iex::ArgExc ("Tried to write more scan lines "
|
|
"than specified by the data window.");
|
|
}
|
|
|
|
//
|
|
// Wait until the next line buffer is ready to be written
|
|
//
|
|
|
|
LineBuffer *writeBuffer =
|
|
_data->getLineBuffer (nextWriteBuffer);
|
|
|
|
writeBuffer->wait();
|
|
|
|
int numLines = writeBuffer->scanLineMax -
|
|
writeBuffer->scanLineMin + 1;
|
|
|
|
_data->missingScanLines -= numLines;
|
|
|
|
//
|
|
// If the line buffer is only partially full, then it is
|
|
// not complete and we cannot write it to disk yet.
|
|
//
|
|
|
|
if (writeBuffer->partiallyFull)
|
|
{
|
|
_data->currentScanLine = _data->currentScanLine +
|
|
step * numLines;
|
|
writeBuffer->post();
|
|
|
|
return;
|
|
}
|
|
|
|
//
|
|
// Write the line buffer
|
|
//
|
|
|
|
writePixelData (_data, writeBuffer);
|
|
nextWriteBuffer += step;
|
|
|
|
_data->currentScanLine = _data->currentScanLine +
|
|
step * numLines;
|
|
|
|
#ifdef DEBUG
|
|
|
|
assert (_data->currentScanLine ==
|
|
((_data->lineOrder == INCREASING_Y) ?
|
|
writeBuffer->scanLineMax + 1:
|
|
writeBuffer->scanLineMin - 1));
|
|
|
|
#endif
|
|
|
|
//
|
|
// Release the lock on the line buffer
|
|
//
|
|
|
|
writeBuffer->post();
|
|
|
|
//
|
|
// If this was the last line buffer in the scanline range
|
|
//
|
|
|
|
if (nextWriteBuffer == stop)
|
|
break;
|
|
|
|
//
|
|
// If there are no more line buffers to compress,
|
|
// then only continue to write out remaining lineBuffers
|
|
//
|
|
|
|
if (nextCompressBuffer == stop)
|
|
continue;
|
|
|
|
//
|
|
// Add nextCompressBuffer as a compression task
|
|
//
|
|
|
|
ThreadPool::addGlobalTask
|
|
(new LineBufferTask (&taskGroup, _data, nextCompressBuffer,
|
|
scanLineMin, scanLineMax));
|
|
|
|
//
|
|
// Update the next line buffer we need to compress
|
|
//
|
|
|
|
nextCompressBuffer += step;
|
|
}
|
|
|
|
//
|
|
// Finish all tasks
|
|
//
|
|
}
|
|
|
|
//
|
|
// Exeption handling:
|
|
//
|
|
// LineBufferTask::execute() may have encountered exceptions, but
|
|
// those exceptions occurred in another thread, not in the thread
|
|
// that is executing this call to OutputFile::writePixels().
|
|
// LineBufferTask::execute() has caught all exceptions and stored
|
|
// the exceptions' what() strings in the line buffers.
|
|
// Now we check if any line buffer contains a stored exception; if
|
|
// this is the case then we re-throw the exception in this thread.
|
|
// (It is possible that multiple line buffers contain stored
|
|
// exceptions. We re-throw the first exception we find and
|
|
// ignore all others.)
|
|
//
|
|
|
|
const string *exception = 0;
|
|
|
|
for (int i = 0; i < _data->lineBuffers.size(); ++i)
|
|
{
|
|
LineBuffer *lineBuffer = _data->lineBuffers[i];
|
|
|
|
if (lineBuffer->hasException && !exception)
|
|
exception = &lineBuffer->exception;
|
|
|
|
lineBuffer->hasException = false;
|
|
}
|
|
|
|
if (exception)
|
|
throw Iex::IoExc (*exception);
|
|
}
|
|
catch (Iex::BaseExc &e)
|
|
{
|
|
REPLACE_EXC (e, "Failed to write pixel data to image "
|
|
"file \"" << fileName() << "\". " << e);
|
|
throw;
|
|
}
|
|
}
|
|
|
|
|
|
int
|
|
OutputFile::currentScanLine () const
|
|
{
|
|
Lock lock (*_data);
|
|
return _data->currentScanLine;
|
|
}
|
|
|
|
|
|
void
|
|
OutputFile::copyPixels (InputFile &in)
|
|
{
|
|
Lock lock (*_data);
|
|
|
|
//
|
|
// Check if this file's and and the InputFile's
|
|
// headers are compatible.
|
|
//
|
|
|
|
const Header &hdr = _data->header;
|
|
const Header &inHdr = in.header();
|
|
|
|
if (inHdr.find("tiles") != inHdr.end())
|
|
THROW (Iex::ArgExc, "Cannot copy pixels from image "
|
|
"file \"" << in.fileName() << "\" to image "
|
|
"file \"" << fileName() << "\". "
|
|
"The input file is tiled, but the output file is "
|
|
"not. Try using TiledOutputFile::copyPixels "
|
|
"instead.");
|
|
|
|
if (!(hdr.dataWindow() == inHdr.dataWindow()))
|
|
THROW (Iex::ArgExc, "Cannot copy pixels from image "
|
|
"file \"" << in.fileName() << "\" to image "
|
|
"file \"" << fileName() << "\". "
|
|
"The files have different data windows.");
|
|
|
|
if (!(hdr.lineOrder() == inHdr.lineOrder()))
|
|
THROW (Iex::ArgExc, "Quick pixel copy from image "
|
|
"file \"" << in.fileName() << "\" to image "
|
|
"file \"" << fileName() << "\" failed. "
|
|
"The files have different line orders.");
|
|
|
|
if (!(hdr.compression() == inHdr.compression()))
|
|
THROW (Iex::ArgExc, "Quick pixel copy from image "
|
|
"file \"" << in.fileName() << "\" to image "
|
|
"file \"" << fileName() << "\" failed. "
|
|
"The files use different compression methods.");
|
|
|
|
if (!(hdr.channels() == inHdr.channels()))
|
|
THROW (Iex::ArgExc, "Quick pixel copy from image "
|
|
"file \"" << in.fileName() << "\" to image "
|
|
"file \"" << fileName() << "\" failed. "
|
|
"The files have different channel lists.");
|
|
|
|
//
|
|
// Verify that no pixel data have been written to this file yet.
|
|
//
|
|
|
|
const Box2i &dataWindow = hdr.dataWindow();
|
|
|
|
if (_data->missingScanLines != dataWindow.max.y - dataWindow.min.y + 1)
|
|
THROW (Iex::LogicExc, "Quick pixel copy from image "
|
|
"file \"" << in.fileName() << "\" to image "
|
|
"file \"" << fileName() << "\" failed. "
|
|
"\"" << fileName() << "\" already contains "
|
|
"pixel data.");
|
|
|
|
//
|
|
// Copy the pixel data.
|
|
//
|
|
|
|
while (_data->missingScanLines > 0)
|
|
{
|
|
const char *pixelData;
|
|
int pixelDataSize;
|
|
|
|
in.rawPixelData (_data->currentScanLine, pixelData, pixelDataSize);
|
|
|
|
writePixelData (_data, lineBufferMinY (_data->currentScanLine,
|
|
_data->minY,
|
|
_data->linesInBuffer),
|
|
pixelData, pixelDataSize);
|
|
|
|
_data->currentScanLine += (_data->lineOrder == INCREASING_Y)?
|
|
_data->linesInBuffer: -_data->linesInBuffer;
|
|
|
|
_data->missingScanLines -= _data->linesInBuffer;
|
|
}
|
|
}
|
|
|
|
|
|
void
|
|
OutputFile::updatePreviewImage (const PreviewRgba newPixels[])
|
|
{
|
|
Lock lock (*_data);
|
|
|
|
if (_data->previewPosition <= 0)
|
|
THROW (Iex::LogicExc, "Cannot update preview image pixels. "
|
|
"File \"" << fileName() << "\" does not "
|
|
"contain a preview image.");
|
|
|
|
//
|
|
// Store the new pixels in the header's preview image attribute.
|
|
//
|
|
|
|
PreviewImageAttribute &pia =
|
|
_data->header.typedAttribute <PreviewImageAttribute> ("preview");
|
|
|
|
PreviewImage &pi = pia.value();
|
|
PreviewRgba *pixels = pi.pixels();
|
|
int numPixels = pi.width() * pi.height();
|
|
|
|
for (int i = 0; i < numPixels; ++i)
|
|
pixels[i] = newPixels[i];
|
|
|
|
//
|
|
// Save the current file position, jump to the position in
|
|
// the file where the preview image starts, store the new
|
|
// preview image, and jump back to the saved file position.
|
|
//
|
|
|
|
Int64 savedPosition = _data->os->tellp();
|
|
|
|
try
|
|
{
|
|
_data->os->seekp (_data->previewPosition);
|
|
pia.writeValueTo (*_data->os, _data->version);
|
|
_data->os->seekp (savedPosition);
|
|
}
|
|
catch (Iex::BaseExc &e)
|
|
{
|
|
REPLACE_EXC (e, "Cannot update preview image pixels for "
|
|
"file \"" << fileName() << "\". " << e);
|
|
throw;
|
|
}
|
|
}
|
|
|
|
|
|
void
|
|
OutputFile::breakScanLine (int y, int offset, int length, char c)
|
|
{
|
|
Lock lock (*_data);
|
|
|
|
Int64 position =
|
|
_data->lineOffsets[(y - _data->minY) / _data->linesInBuffer];
|
|
|
|
if (!position)
|
|
THROW (Iex::ArgExc, "Cannot overwrite scan line " << y << ". "
|
|
"The scan line has not yet been stored in "
|
|
"file \"" << fileName() << "\".");
|
|
|
|
_data->currentPosition = 0;
|
|
_data->os->seekp (position + offset);
|
|
|
|
for (int i = 0; i < length; ++i)
|
|
_data->os->write (&c, 1);
|
|
}
|
|
|
|
|
|
} // namespace Imf
|