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opencv/3rdparty/openexr/IlmImf/ImfTiledInputFile.cpp
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2012-10-17 15:57:49 +04:00

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///////////////////////////////////////////////////////////////////////////
//
// Copyright (c) 2004, Industrial Light & Magic, a division of Lucas
// Digital Ltd. LLC
//
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Industrial Light & Magic nor the names of
// its contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
///////////////////////////////////////////////////////////////////////////
//-----------------------------------------------------------------------------
//
// class TiledInputFile
//
//-----------------------------------------------------------------------------
#include <ImfTiledInputFile.h>
#include <ImfTileDescriptionAttribute.h>
#include <ImfChannelList.h>
#include <ImfMisc.h>
#include <ImfTiledMisc.h>
#include <ImfStdIO.h>
#include <ImfCompressor.h>
#include "ImathBox.h"
#include <ImfXdr.h>
#include <ImfConvert.h>
#include <ImfVersion.h>
#include <ImfTileOffsets.h>
#include <ImfThreading.h>
#include "IlmThreadPool.h"
#include "IlmThreadSemaphore.h"
#include "IlmThreadMutex.h"
#include "ImathVec.h"
#include "Iex.h"
#include <string>
#include <vector>
#include <algorithm>
#include <assert.h>
namespace Imf {
using Imath::Box2i;
using Imath::V2i;
using std::string;
using std::vector;
using std::min;
using std::max;
using IlmThread::Mutex;
using IlmThread::Lock;
using IlmThread::Semaphore;
using IlmThread::Task;
using IlmThread::TaskGroup;
using IlmThread::ThreadPool;
namespace {
struct TInSliceInfo
{
PixelType typeInFrameBuffer;
PixelType typeInFile;
char * base;
size_t xStride;
size_t yStride;
bool fill;
bool skip;
double fillValue;
int xTileCoords;
int yTileCoords;
TInSliceInfo (PixelType typeInFrameBuffer = HALF,
PixelType typeInFile = HALF,
char *base = 0,
size_t xStride = 0,
size_t yStride = 0,
bool fill = false,
bool skip = false,
double fillValue = 0.0,
int xTileCoords = 0,
int yTileCoords = 0);
};
TInSliceInfo::TInSliceInfo (PixelType tifb,
PixelType tifl,
char *b,
size_t xs, size_t ys,
bool f, bool s,
double fv,
int xtc,
int ytc)
:
typeInFrameBuffer (tifb),
typeInFile (tifl),
base (b),
xStride (xs),
yStride (ys),
fill (f),
skip (s),
fillValue (fv),
xTileCoords (xtc),
yTileCoords (ytc)
{
// empty
}
struct TileBuffer
{
const char * uncompressedData;
char * buffer;
int dataSize;
Compressor * compressor;
Compressor::Format format;
int dx;
int dy;
int lx;
int ly;
bool hasException;
string exception;
TileBuffer (Compressor * const comp);
~TileBuffer ();
inline void wait () {_sem.wait();}
inline void post () {_sem.post();}
protected:
Semaphore _sem;
};
TileBuffer::TileBuffer (Compressor *comp):
uncompressedData (0),
dataSize (0),
compressor (comp),
format (defaultFormat (compressor)),
dx (-1),
dy (-1),
lx (-1),
ly (-1),
hasException (false),
exception (),
_sem (1)
{
// empty
}
TileBuffer::~TileBuffer ()
{
delete compressor;
}
} // namespace
//
// struct TiledInputFile::Data stores things that will be
// needed between calls to readTile()
//
struct TiledInputFile::Data: public Mutex
{
Header header; // the image header
TileDescription tileDesc; // describes the tile layout
int version; // file's version
FrameBuffer frameBuffer; // framebuffer to write into
LineOrder lineOrder; // the file's lineorder
int minX; // data window's min x coord
int maxX; // data window's max x coord
int minY; // data window's min y coord
int maxY; // data window's max x coord
int numXLevels; // number of x levels
int numYLevels; // number of y levels
int * numXTiles; // number of x tiles at a level
int * numYTiles; // number of y tiles at a level
TileOffsets tileOffsets; // stores offsets in file for
// each tile
bool fileIsComplete; // True if no tiles are missing
// in the file
Int64 currentPosition; // file offset for current tile,
// used to prevent unnecessary
// seeking
vector<TInSliceInfo> slices; // info about channels in file
IStream * is; // file stream to read from
bool deleteStream; // should we delete the stream
// ourselves? or does someone
// else do it?
size_t bytesPerPixel; // size of an uncompressed pixel
size_t maxBytesPerTileLine; // combined size of a line
// over all channels
vector<TileBuffer*> tileBuffers; // each holds a single tile
size_t tileBufferSize; // size of the tile buffers
Data (bool deleteStream, int numThreads);
~Data ();
inline TileBuffer * getTileBuffer (int number);
// hash function from tile indices
// into our vector of tile buffers
};
TiledInputFile::Data::Data (bool del, int numThreads):
numXTiles (0),
numYTiles (0),
is (0),
deleteStream (del)
{
//
// We need at least one tileBuffer, but if threading is used,
// to keep n threads busy we need 2*n tileBuffers
//
tileBuffers.resize (max (1, 2 * numThreads));
}
TiledInputFile::Data::~Data ()
{
delete [] numXTiles;
delete [] numYTiles;
if (deleteStream)
delete is;
for (size_t i = 0; i < tileBuffers.size(); i++)
delete tileBuffers[i];
}
TileBuffer*
TiledInputFile::Data::getTileBuffer (int number)
{
return tileBuffers[number % tileBuffers.size()];
}
namespace {
void
readTileData (TiledInputFile::Data *ifd,
int dx, int dy,
int lx, int ly,
char *&buffer,
int &dataSize)
{
//
// Read a single tile block from the file and into the array pointed
// to by buffer. If the file is memory-mapped, then we change where
// buffer points instead of writing into the array (hence buffer needs
// to be a reference to a char *).
//
//
// Look up the location for this tile in the Index and
// seek to that position if necessary
//
Int64 tileOffset = ifd->tileOffsets (dx, dy, lx, ly);
if (tileOffset == 0)
{
THROW (Iex::InputExc, "Tile (" << dx << ", " << dy << ", " <<
lx << ", " << ly << ") is missing.");
}
if (ifd->currentPosition != tileOffset)
ifd->is->seekg (tileOffset);
//
// Read the first few bytes of the tile (the header).
// Verify that the tile coordinates and the level number
// are correct.
//
int tileXCoord, tileYCoord, levelX, levelY;
Xdr::read <StreamIO> (*ifd->is, tileXCoord);
Xdr::read <StreamIO> (*ifd->is, tileYCoord);
Xdr::read <StreamIO> (*ifd->is, levelX);
Xdr::read <StreamIO> (*ifd->is, levelY);
Xdr::read <StreamIO> (*ifd->is, dataSize);
if (tileXCoord != dx)
throw Iex::InputExc ("Unexpected tile x coordinate.");
if (tileYCoord != dy)
throw Iex::InputExc ("Unexpected tile y coordinate.");
if (levelX != lx)
throw Iex::InputExc ("Unexpected tile x level number coordinate.");
if (levelY != ly)
throw Iex::InputExc ("Unexpected tile y level number coordinate.");
if (dataSize > (int) ifd->tileBufferSize)
throw Iex::InputExc ("Unexpected tile block length.");
//
// Read the pixel data.
//
if (ifd->is->isMemoryMapped ())
buffer = ifd->is->readMemoryMapped (dataSize);
else
ifd->is->read (buffer, dataSize);
//
// Keep track of which tile is the next one in
// the file, so that we can avoid redundant seekg()
// operations (seekg() can be fairly expensive).
//
ifd->currentPosition = tileOffset + 5 * Xdr::size<int>() + dataSize;
}
void
readNextTileData (TiledInputFile::Data *ifd,
int &dx, int &dy,
int &lx, int &ly,
char * & buffer,
int &dataSize)
{
//
// Read the next tile block from the file
//
//
// Read the first few bytes of the tile (the header).
//
Xdr::read <StreamIO> (*ifd->is, dx);
Xdr::read <StreamIO> (*ifd->is, dy);
Xdr::read <StreamIO> (*ifd->is, lx);
Xdr::read <StreamIO> (*ifd->is, ly);
Xdr::read <StreamIO> (*ifd->is, dataSize);
if (dataSize > (int) ifd->tileBufferSize)
throw Iex::InputExc ("Unexpected tile block length.");
//
// Read the pixel data.
//
ifd->is->read (buffer, dataSize);
//
// Keep track of which tile is the next one in
// the file, so that we can avoid redundant seekg()
// operations (seekg() can be fairly expensive).
//
ifd->currentPosition += 5 * Xdr::size<int>() + dataSize;
}
//
// A TileBufferTask encapsulates the task of uncompressing
// a single tile and copying it into the frame buffer.
//
class TileBufferTask : public Task
{
public:
TileBufferTask (TaskGroup *group,
TiledInputFile::Data *ifd,
TileBuffer *tileBuffer);
virtual ~TileBufferTask ();
virtual void execute ();
private:
TiledInputFile::Data * _ifd;
TileBuffer * _tileBuffer;
};
TileBufferTask::TileBufferTask
(TaskGroup *group,
TiledInputFile::Data *ifd,
TileBuffer *tileBuffer)
:
Task (group),
_ifd (ifd),
_tileBuffer (tileBuffer)
{
// empty
}
TileBufferTask::~TileBufferTask ()
{
//
// Signal that the tile buffer is now free
//
_tileBuffer->post ();
}
void
TileBufferTask::execute ()
{
try
{
//
// Calculate information about the tile
//
Box2i tileRange = Imf::dataWindowForTile (_ifd->tileDesc,
_ifd->minX, _ifd->maxX,
_ifd->minY, _ifd->maxY,
_tileBuffer->dx,
_tileBuffer->dy,
_tileBuffer->lx,
_tileBuffer->ly);
int numPixelsPerScanLine = tileRange.max.x - tileRange.min.x + 1;
int numPixelsInTile = numPixelsPerScanLine *
(tileRange.max.y - tileRange.min.y + 1);
int sizeOfTile = _ifd->bytesPerPixel * numPixelsInTile;
//
// Uncompress the data, if necessary
//
if (_tileBuffer->compressor && _tileBuffer->dataSize < sizeOfTile)
{
_tileBuffer->format = _tileBuffer->compressor->format();
_tileBuffer->dataSize = _tileBuffer->compressor->uncompressTile
(_tileBuffer->buffer, _tileBuffer->dataSize,
tileRange, _tileBuffer->uncompressedData);
}
else
{
//
// If the line is uncompressed, it's in XDR format,
// regardless of the compressor's output format.
//
_tileBuffer->format = Compressor::XDR;
_tileBuffer->uncompressedData = _tileBuffer->buffer;
}
//
// Convert the tile of pixel data back from the machine-independent
// representation, and store the result in the frame buffer.
//
const char *readPtr = _tileBuffer->uncompressedData;
// points to where we
// read from in the
// tile block
//
// Iterate over the scan lines in the tile.
//
for (int y = tileRange.min.y; y <= tileRange.max.y; ++y)
{
//
// Iterate over all image channels.
//
for (unsigned int i = 0; i < _ifd->slices.size(); ++i)
{
const TInSliceInfo &slice = _ifd->slices[i];
//
// These offsets are used to facilitate both
// absolute and tile-relative pixel coordinates.
//
int xOffset = slice.xTileCoords * tileRange.min.x;
int yOffset = slice.yTileCoords * tileRange.min.y;
//
// Fill the frame buffer with pixel data.
//
if (slice.skip)
{
//
// The file contains data for this channel, but
// the frame buffer contains no slice for this channel.
//
skipChannel (readPtr, slice.typeInFile,
numPixelsPerScanLine);
}
else
{
//
// The frame buffer contains a slice for this channel.
//
char *writePtr = slice.base +
(y - yOffset) * slice.yStride +
(tileRange.min.x - xOffset) *
slice.xStride;
char *endPtr = writePtr +
(numPixelsPerScanLine - 1) * slice.xStride;
copyIntoFrameBuffer (readPtr, writePtr, endPtr,
slice.xStride,
slice.fill, slice.fillValue,
_tileBuffer->format,
slice.typeInFrameBuffer,
slice.typeInFile);
}
}
}
}
catch (std::exception &e)
{
if (!_tileBuffer->hasException)
{
_tileBuffer->exception = e.what ();
_tileBuffer->hasException = true;
}
}
catch (...)
{
if (!_tileBuffer->hasException)
{
_tileBuffer->exception = "unrecognized exception";
_tileBuffer->hasException = true;
}
}
}
TileBufferTask *
newTileBufferTask
(TaskGroup *group,
TiledInputFile::Data *ifd,
int number,
int dx, int dy,
int lx, int ly)
{
//
// Wait for a tile buffer to become available,
// fill the buffer with raw data from the file,
// and create a new TileBufferTask whose execute()
// method will uncompress the tile and copy the
// tile's pixels into the frame buffer.
//
TileBuffer *tileBuffer = ifd->getTileBuffer (number);
try
{
tileBuffer->wait();
tileBuffer->dx = dx;
tileBuffer->dy = dy;
tileBuffer->lx = lx;
tileBuffer->ly = ly;
tileBuffer->uncompressedData = 0;
readTileData (ifd, dx, dy, lx, ly,
tileBuffer->buffer,
tileBuffer->dataSize);
}
catch (...)
{
//
// Reading from the file caused an exception.
// Signal that the tile buffer is free, and
// re-throw the exception.
//
tileBuffer->post();
throw;
}
return new TileBufferTask (group, ifd, tileBuffer);
}
} // namespace
TiledInputFile::TiledInputFile (const char fileName[], int numThreads):
_data (new Data (true, numThreads))
{
//
// This constructor is called when a user
// explicitly wants to read a tiled file.
//
try
{
_data->is = new StdIFStream (fileName);
_data->header.readFrom (*_data->is, _data->version);
initialize();
}
catch (Iex::BaseExc &e)
{
delete _data;
REPLACE_EXC (e, "Cannot open image file "
"\"" << fileName << "\". " << e);
throw;
}
catch (...)
{
delete _data;
throw;
}
}
TiledInputFile::TiledInputFile (IStream &is, int numThreads):
_data (new Data (false, numThreads))
{
//
// This constructor is called when a user
// explicitly wants to read a tiled file.
//
try
{
_data->is = &is;
_data->header.readFrom (*_data->is, _data->version);
initialize();
}
catch (Iex::BaseExc &e)
{
delete _data;
REPLACE_EXC (e, "Cannot open image file "
"\"" << is.fileName() << "\". " << e);
throw;
}
catch (...)
{
delete _data;
throw;
}
}
TiledInputFile::TiledInputFile
(const Header &header,
IStream *is,
int version,
int numThreads)
:
_data (new Data (false, numThreads))
{
//
// This constructor called by class Imf::InputFile
// when a user wants to just read an image file, and
// doesn't care or know if the file is tiled.
//
_data->is = is;
_data->header = header;
_data->version = version;
initialize();
}
void
TiledInputFile::initialize ()
{
if (!isTiled (_data->version))
throw Iex::ArgExc ("Expected a tiled file but the file is not tiled.");
_data->header.sanityCheck (true);
_data->tileDesc = _data->header.tileDescription();
_data->lineOrder = _data->header.lineOrder();
//
// Save the dataWindow information
//
const Box2i &dataWindow = _data->header.dataWindow();
_data->minX = dataWindow.min.x;
_data->maxX = dataWindow.max.x;
_data->minY = dataWindow.min.y;
_data->maxY = dataWindow.max.y;
//
// Precompute level and tile information to speed up utility functions
//
precalculateTileInfo (_data->tileDesc,
_data->minX, _data->maxX,
_data->minY, _data->maxY,
_data->numXTiles, _data->numYTiles,
_data->numXLevels, _data->numYLevels);
_data->bytesPerPixel = calculateBytesPerPixel (_data->header);
_data->maxBytesPerTileLine = _data->bytesPerPixel * _data->tileDesc.xSize;
_data->tileBufferSize = _data->maxBytesPerTileLine * _data->tileDesc.ySize;
//
// Create all the TileBuffers and allocate their internal buffers
//
for (size_t i = 0; i < _data->tileBuffers.size(); i++)
{
_data->tileBuffers[i] = new TileBuffer (newTileCompressor
(_data->header.compression(),
_data->maxBytesPerTileLine,
_data->tileDesc.ySize,
_data->header));
if (!_data->is->isMemoryMapped ())
_data->tileBuffers[i]->buffer = new char [_data->tileBufferSize];
}
_data->tileOffsets = TileOffsets (_data->tileDesc.mode,
_data->numXLevels,
_data->numYLevels,
_data->numXTiles,
_data->numYTiles);
_data->tileOffsets.readFrom (*(_data->is), _data->fileIsComplete);
_data->currentPosition = _data->is->tellg();
}
TiledInputFile::~TiledInputFile ()
{
if (!_data->is->isMemoryMapped())
for (size_t i = 0; i < _data->tileBuffers.size(); i++)
delete [] _data->tileBuffers[i]->buffer;
delete _data;
}
const char *
TiledInputFile::fileName () const
{
return _data->is->fileName();
}
const Header &
TiledInputFile::header () const
{
return _data->header;
}
int
TiledInputFile::version () const
{
return _data->version;
}
void
TiledInputFile::setFrameBuffer (const FrameBuffer &frameBuffer)
{
Lock lock (*_data);
//
// Set the frame buffer
//
//
// Check if the new frame buffer descriptor is
// compatible with the image file header.
//
const ChannelList &channels = _data->header.channels();
for (FrameBuffer::ConstIterator j = frameBuffer.begin();
j != frameBuffer.end();
++j)
{
ChannelList::ConstIterator i = channels.find (j.name());
if (i == channels.end())
continue;
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 input file \"" << fileName() << "\" are "
"not compatible with the frame buffer's "
"subsampling factors.");
}
//
// Initialize the slice table for readPixels().
//
vector<TInSliceInfo> slices;
ChannelList::ConstIterator i = channels.begin();
for (FrameBuffer::ConstIterator j = frameBuffer.begin();
j != frameBuffer.end();
++j)
{
while (i != channels.end() && strcmp (i.name(), j.name()) < 0)
{
//
// Channel i is present in the file but not
// in the frame buffer; data for channel i
// will be skipped during readPixels().
//
slices.push_back (TInSliceInfo (i.channel().type,
i.channel().type,
0, // base
0, // xStride
0, // yStride
false, // fill
true, // skip
0.0)); // fillValue
++i;
}
bool fill = false;
if (i == channels.end() || strcmp (i.name(), j.name()) > 0)
{
//
// Channel i is present in the frame buffer, but not in the file.
// In the frame buffer, slice j will be filled with a default value.
//
fill = true;
}
slices.push_back (TInSliceInfo (j.slice().type,
fill? j.slice().type: i.channel().type,
j.slice().base,
j.slice().xStride,
j.slice().yStride,
fill,
false, // skip
j.slice().fillValue,
(j.slice().xTileCoords)? 1: 0,
(j.slice().yTileCoords)? 1: 0));
if (i != channels.end() && !fill)
++i;
}
while (i != channels.end())
{
//
// Channel i is present in the file but not
// in the frame buffer; data for channel i
// will be skipped during readPixels().
//
slices.push_back (TInSliceInfo (i.channel().type,
i.channel().type,
0, // base
0, // xStride
0, // yStride
false, // fill
true, // skip
0.0)); // fillValue
++i;
}
//
// Store the new frame buffer.
//
_data->frameBuffer = frameBuffer;
_data->slices = slices;
}
const FrameBuffer &
TiledInputFile::frameBuffer () const
{
Lock lock (*_data);
return _data->frameBuffer;
}
bool
TiledInputFile::isComplete () const
{
return _data->fileIsComplete;
}
void
TiledInputFile::readTiles (int dx1, int dx2, int dy1, int dy2, int lx, int ly)
{
//
// Read a range of tiles from the file into the framebuffer
//
try
{
Lock lock (*_data);
if (_data->slices.size() == 0)
throw Iex::ArgExc ("No frame buffer specified "
"as pixel data destination.");
//
// Determine the first and last tile coordinates in both dimensions.
// We always attempt to read the range of tiles in the order that
// they are stored in the file.
//
if (dx1 > dx2)
std::swap (dx1, dx2);
if (dy1 > dy2)
std::swap (dy1, dy2);
int dyStart = dy1;
int dyStop = dy2 + 1;
int dY = 1;
if (_data->lineOrder == DECREASING_Y)
{
dyStart = dy2;
dyStop = dy1 - 1;
dY = -1;
}
//
// Create a task group for all tile buffer tasks. When the
// task group goes out of scope, the destructor waits until
// all tasks are complete.
//
{
TaskGroup taskGroup;
int tileNumber = 0;
for (int dy = dyStart; dy != dyStop; dy += dY)
{
for (int dx = dx1; dx <= dx2; dx++)
{
if (!isValidTile (dx, dy, lx, ly))
THROW (Iex::ArgExc,
"Tile (" << dx << ", " << dy << ", " <<
lx << "," << ly << ") is not a valid tile.");
ThreadPool::addGlobalTask (newTileBufferTask (&taskGroup,
_data,
tileNumber++,
dx, dy,
lx, ly));
}
}
//
// finish all tasks
//
}
//
// Exeption handling:
//
// TileBufferTask::execute() may have encountered exceptions, but
// those exceptions occurred in another thread, not in the thread
// that is executing this call to TiledInputFile::readTiles().
// TileBufferTask::execute() has caught all exceptions and stored
// the exceptions' what() strings in the tile buffers.
// Now we check if any tile buffer contains a stored exception; if
// this is the case then we re-throw the exception in this thread.
// (It is possible that multiple tile 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->tileBuffers.size(); ++i)
{
TileBuffer *tileBuffer = _data->tileBuffers[i];
if (tileBuffer->hasException && !exception)
exception = &tileBuffer->exception;
tileBuffer->hasException = false;
}
if (exception)
throw Iex::IoExc (*exception);
}
catch (Iex::BaseExc &e)
{
REPLACE_EXC (e, "Error reading pixel data from image "
"file \"" << fileName() << "\". " << e);
throw;
}
}
void
TiledInputFile::readTiles (int dx1, int dx2, int dy1, int dy2, int l)
{
readTiles (dx1, dx2, dy1, dy2, l, l);
}
void
TiledInputFile::readTile (int dx, int dy, int lx, int ly)
{
readTiles (dx, dx, dy, dy, lx, ly);
}
void
TiledInputFile::readTile (int dx, int dy, int l)
{
readTile (dx, dy, l, l);
}
void
TiledInputFile::rawTileData (int &dx, int &dy,
int &lx, int &ly,
const char *&pixelData,
int &pixelDataSize)
{
try
{
Lock lock (*_data);
if (!isValidTile (dx, dy, lx, ly))
throw Iex::ArgExc ("Tried to read a tile outside "
"the image file's data window.");
TileBuffer *tileBuffer = _data->getTileBuffer (0);
readNextTileData (_data, dx, dy, lx, ly,
tileBuffer->buffer,
pixelDataSize);
pixelData = tileBuffer->buffer;
}
catch (Iex::BaseExc &e)
{
REPLACE_EXC (e, "Error reading pixel data from image "
"file \"" << fileName() << "\". " << e);
throw;
}
}
unsigned int
TiledInputFile::tileXSize () const
{
return _data->tileDesc.xSize;
}
unsigned int
TiledInputFile::tileYSize () const
{
return _data->tileDesc.ySize;
}
LevelMode
TiledInputFile::levelMode () const
{
return _data->tileDesc.mode;
}
LevelRoundingMode
TiledInputFile::levelRoundingMode () const
{
return _data->tileDesc.roundingMode;
}
int
TiledInputFile::numLevels () const
{
if (levelMode() == RIPMAP_LEVELS)
THROW (Iex::LogicExc, "Error calling numLevels() on image "
"file \"" << fileName() << "\" "
"(numLevels() is not defined for files "
"with RIPMAP level mode).");
return _data->numXLevels;
}
int
TiledInputFile::numXLevels () const
{
return _data->numXLevels;
}
int
TiledInputFile::numYLevels () const
{
return _data->numYLevels;
}
bool
TiledInputFile::isValidLevel (int lx, int ly) const
{
if (lx < 0 || ly < 0)
return false;
if (levelMode() == MIPMAP_LEVELS && lx != ly)
return false;
if (lx >= numXLevels() || ly >= numYLevels())
return false;
return true;
}
int
TiledInputFile::levelWidth (int lx) const
{
try
{
return levelSize (_data->minX, _data->maxX, lx,
_data->tileDesc.roundingMode);
}
catch (Iex::BaseExc &e)
{
REPLACE_EXC (e, "Error calling levelWidth() on image "
"file \"" << fileName() << "\". " << e);
throw;
}
}
int
TiledInputFile::levelHeight (int ly) const
{
try
{
return levelSize (_data->minY, _data->maxY, ly,
_data->tileDesc.roundingMode);
}
catch (Iex::BaseExc &e)
{
REPLACE_EXC (e, "Error calling levelHeight() on image "
"file \"" << fileName() << "\". " << e);
throw;
}
}
int
TiledInputFile::numXTiles (int lx) const
{
if (lx < 0 || lx >= _data->numXLevels)
{
THROW (Iex::ArgExc, "Error calling numXTiles() on image "
"file \"" << _data->is->fileName() << "\" "
"(Argument is not in valid range).");
}
return _data->numXTiles[lx];
}
int
TiledInputFile::numYTiles (int ly) const
{
if (ly < 0 || ly >= _data->numYLevels)
{
THROW (Iex::ArgExc, "Error calling numYTiles() on image "
"file \"" << _data->is->fileName() << "\" "
"(Argument is not in valid range).");
}
return _data->numYTiles[ly];
}
Box2i
TiledInputFile::dataWindowForLevel (int l) const
{
return dataWindowForLevel (l, l);
}
Box2i
TiledInputFile::dataWindowForLevel (int lx, int ly) const
{
try
{
return Imf::dataWindowForLevel (_data->tileDesc,
_data->minX, _data->maxX,
_data->minY, _data->maxY,
lx, ly);
}
catch (Iex::BaseExc &e)
{
REPLACE_EXC (e, "Error calling dataWindowForLevel() on image "
"file \"" << fileName() << "\". " << e);
throw;
}
}
Box2i
TiledInputFile::dataWindowForTile (int dx, int dy, int l) const
{
return dataWindowForTile (dx, dy, l, l);
}
Box2i
TiledInputFile::dataWindowForTile (int dx, int dy, int lx, int ly) const
{
try
{
if (!isValidTile (dx, dy, lx, ly))
throw Iex::ArgExc ("Arguments not in valid range.");
return Imf::dataWindowForTile (_data->tileDesc,
_data->minX, _data->maxX,
_data->minY, _data->maxY,
dx, dy, lx, ly);
}
catch (Iex::BaseExc &e)
{
REPLACE_EXC (e, "Error calling dataWindowForTile() on image "
"file \"" << fileName() << "\". " << e);
throw;
}
}
bool
TiledInputFile::isValidTile (int dx, int dy, int lx, int ly) const
{
return ((lx < _data->numXLevels && lx >= 0) &&
(ly < _data->numYLevels && ly >= 0) &&
(dx < _data->numXTiles[lx] && dx >= 0) &&
(dy < _data->numYTiles[ly] && dy >= 0));
}
} // namespace Imf
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