imftiledrgbafile.cpp

对gif

TiledRgbaOutputFile::numYTiles (int ly) const
{
     return _outputFile->numYTiles (ly);
}


Imath::Box2i
TiledRgbaOutputFile::dataWindowForLevel (int l) const
{
     return _outputFile->dataWindowForLevel (l);
}


Imath::Box2i
TiledRgbaOutputFile::dataWindowForLevel (int lx, int ly) const
{
     return _outputFile->dataWindowForLevel (lx, ly);
}


Imath::Box2i
TiledRgbaOutputFile::dataWindowForTile (int dx, int dy, int l) const
{
     return _outputFile->dataWindowForTile (dx, dy, l);
}


Imath::Box2i
TiledRgbaOutputFile::dataWindowForTile (int dx, int dy, int lx, int ly) const
{
     return _outputFile->dataWindowForTile (dx, dy, lx, ly);
}


void
TiledRgbaOutputFile::writeTile (int dx, int dy, int l)
{
    if (_toYa)
    {
	Lock lock (*_toYa);
	_toYa->writeTile (dx, dy, l, l);
    }
    else
    {
	 _outputFile->writeTile (dx, dy, l);
    }
}


void
TiledRgbaOutputFile::writeTile (int dx, int dy, int lx, int ly)
{
    if (_toYa)
    {
	Lock lock (*_toYa);
	_toYa->writeTile (dx, dy, lx, ly);
    }
    else
    {
	 _outputFile->writeTile (dx, dy, lx, ly);
    }
}


void	
TiledRgbaOutputFile::writeTiles
    (int dxMin, int dxMax, int dyMin, int dyMax, int lx, int ly)
{
    if (_toYa)
    {
	Lock lock (*_toYa);

        for (int dy = dyMin; dy <= dyMax; dy++)
            for (int dx = dxMin; dx <= dxMax; dx++)
	        _toYa->writeTile (dx, dy, lx, ly);
    }
    else
    {
        _outputFile->writeTiles (dxMin, dxMax, dyMin, dyMax, lx, ly);
    }
}

void	
TiledRgbaOutputFile::writeTiles
    (int dxMin, int dxMax, int dyMin, int dyMax, int l)
{
    writeTiles (dxMin, dxMax, dyMin, dyMax, l, l);
}


class TiledRgbaInputFile::FromYa: public Mutex
{
  public:

     FromYa (TiledInputFile &inputFile);

     void	setFrameBuffer (Rgba *base,
				size_t xStride,
				size_t yStride);

     void	readTile (int dx, int dy, int lx, int ly);

  private:

     TiledInputFile &	_inputFile;
     unsigned int	_tileXSize;
     unsigned int	_tileYSize;
     V3f		_yw;
     Array2D <Rgba>	_buf;
     Rgba *		_fbBase;
     size_t		_fbXStride;
     size_t		_fbYStride;
};


TiledRgbaInputFile::FromYa::FromYa (TiledInputFile &inputFile)
:
    _inputFile (inputFile)
{
    const TileDescription &td = inputFile.header().tileDescription();

    _tileXSize = td.xSize;
    _tileYSize = td.ySize;
    _yw = ywFromHeader (_inputFile.header());
    _buf.resizeErase (_tileYSize, _tileXSize);
    _fbBase = 0;
    _fbXStride = 0;
    _fbYStride = 0;
}


void
TiledRgbaInputFile::FromYa::setFrameBuffer (Rgba *base,
					    size_t xStride,
					    size_t yStride)
{
    _fbBase = base;
    _fbXStride = xStride;
    _fbYStride = yStride;
}


void
TiledRgbaInputFile::FromYa::readTile (int dx, int dy, int lx, int ly)
{
    if (_fbBase == 0)
    {
	THROW (Iex::ArgExc, "No frame buffer was specified as the "
			    "pixel data destination for image file "
			    "\"" << _inputFile.fileName() << "\".");
    }

    //
    // Read the tile requiested by the caller into _buf.
    //
    
    Box2i dw = _inputFile.dataWindowForTile (dx, dy, lx, ly);
    FrameBuffer fb;

    fb.insert ("Y", Slice (HALF,				   // type
			   (char *) &_buf[-dw.min.y][-dw.min.x].g, // base
			   sizeof (Rgba),			   // xStride
			   sizeof (Rgba) * _tileXSize));	   // yStride

    fb.insert ("A", Slice (HALF,				   // type
			   (char *) &_buf[-dw.min.y][-dw.min.x].a, // base
			   sizeof (Rgba),			   // xStride
			   sizeof (Rgba) * _tileXSize,		   // yStride
			   1, 1,				   // sampling
			   1.0));				   // fillValue

    _inputFile.setFrameBuffer (fb);
    _inputFile.readTile (dx, dy, lx, ly);

    //
    // Convert the luminance/alpha pixels to RGBA
    // and copy them into the caller's frame buffer.
    //

    int width = dw.max.x - dw.min.x + 1;

    for (int y = dw.min.y, y1 = 0; y <= dw.max.y; ++y, ++y1)
    {
	for (int x1 = 0; x1 < width; ++x1)
	{
	    _buf[y1][x1].r = 0;
	    _buf[y1][x1].b = 0;
	}

	YCAtoRGBA (_yw, width, _buf[y1], _buf[y1]);

	for (int x = dw.min.x, x1 = 0; x <= dw.max.x; ++x, ++x1)
	{
	    _fbBase[x * _fbXStride + y * _fbYStride] = _buf[y1][x1];
	}
    }
}


TiledRgbaInputFile::TiledRgbaInputFile (const char name[], int numThreads):
    _inputFile (new TiledInputFile (name, numThreads)),
    _fromYa (0)
{
    if (channels() & WRITE_Y)
	_fromYa = new FromYa (*_inputFile);
}


TiledRgbaInputFile::TiledRgbaInputFile (IStream &is, int numThreads):
    _inputFile (new TiledInputFile (is, numThreads)),
    _fromYa (0)
{
    if (channels() & WRITE_Y)
	_fromYa = new FromYa (*_inputFile);
}


TiledRgbaInputFile::~TiledRgbaInputFile ()
{
    delete _inputFile;
    delete _fromYa;
}


void	
TiledRgbaInputFile::setFrameBuffer (Rgba *base, size_t xStride, size_t yStride)
{
    if (_fromYa)
    {
	Lock lock (*_fromYa);
	_fromYa->setFrameBuffer (base, xStride, yStride);
    }
    else
    {
	size_t xs = xStride * sizeof (Rgba);
	size_t ys = yStride * sizeof (Rgba);

	FrameBuffer fb;

	fb.insert ("R", Slice (HALF,
			       (char *) &base[0].r,
			       xs, ys,
			       1, 1,	// xSampling, ySampling
			       0.0));	// fillValue

	fb.insert ("G", Slice (HALF,
			       (char *) &base[0].g,
			       xs, ys,
			       1, 1,	// xSampling, ySampling
			       0.0));	// fillValue

	fb.insert ("B", Slice (HALF,
			       (char *) &base[0].b,
			       xs, ys,
			       1, 1,	// xSampling, ySampling
			       0.0));	// fillValue

	fb.insert ("A", Slice (HALF,
			       (char *) &base[0].a,
			       xs, ys,
			       1, 1,	// xSampling, ySampling
			       1.0));	// fillValue

	_inputFile->setFrameBuffer (fb);
    }
}


const Header &
TiledRgbaInputFile::header () const
{
    return _inputFile->header();
}


const char *
TiledRgbaInputFile::fileName () const
{
    return _inputFile->fileName();
}


const FrameBuffer &	
TiledRgbaInputFile::frameBuffer () const
{
    return _inputFile->frameBuffer();
}


const Imath::Box2i &
TiledRgbaInputFile::displayWindow () const
{
    return _inputFile->header().displayWindow();
}


const Imath::Box2i &
TiledRgbaInputFile::dataWindow () const
{
    return _inputFile->header().dataWindow();
}


float	
TiledRgbaInputFile::pixelAspectRatio () const
{
    return _inputFile->header().pixelAspectRatio();
}


const Imath::V2f	
TiledRgbaInputFile::screenWindowCenter () const
{
    return _inputFile->header().screenWindowCenter();
}


float	
TiledRgbaInputFile::screenWindowWidth () const
{
    return _inputFile->header().screenWindowWidth();
}


LineOrder
TiledRgbaInputFile::lineOrder () const
{
    return _inputFile->header().lineOrder();
}


Compression
TiledRgbaInputFile::compression () const
{
    return _inputFile->header().compression();
}


RgbaChannels	
TiledRgbaInputFile::channels () const
{
    return rgbaChannels (_inputFile->header().channels());
}


int
TiledRgbaInputFile::version () const
{
    return _inputFile->version();
}


bool
TiledRgbaInputFile::isComplete () const
{
    return _inputFile->isComplete();
}


unsigned int
TiledRgbaInputFile::tileXSize () const
{
     return _inputFile->tileXSize();
}


unsigned int
TiledRgbaInputFile::tileYSize () const
{
     return _inputFile->tileYSize();
}


LevelMode
TiledRgbaInputFile::levelMode () const
{
     return _inputFile->levelMode();
}


LevelRoundingMode
TiledRgbaInputFile::levelRoundingMode () const
{
     return _inputFile->levelRoundingMode();
}


int
TiledRgbaInputFile::numLevels () const
{
     return _inputFile->numLevels();
}


int
TiledRgbaInputFile::numXLevels () const
{
     return _inputFile->numXLevels();
}


int
TiledRgbaInputFile::numYLevels () const
{
     return _inputFile->numYLevels();
}


bool
TiledRgbaInputFile::isValidLevel (int lx, int ly) const
{
    return _inputFile->isValidLevel (lx, ly);
}


int
TiledRgbaInputFile::levelWidth (int lx) const
{
     return _inputFile->levelWidth (lx);
}


int
TiledRgbaInputFile::levelHeight (int ly) const
{
     return _inputFile->levelHeight (ly);
}


int
TiledRgbaInputFile::numXTiles (int lx) const
{
     return _inputFile->numXTiles(lx);
}


int
TiledRgbaInputFile::numYTiles (int ly) const
{
     return _inputFile->numYTiles(ly);
}


Imath::Box2i
TiledRgbaInputFile::dataWindowForLevel (int l) const
{
     return _inputFile->dataWindowForLevel (l);
}


Imath::Box2i
TiledRgbaInputFile::dataWindowForLevel (int lx, int ly) const
{
     return _inputFile->dataWindowForLevel (lx, ly);
}


Imath::Box2i
TiledRgbaInputFile::dataWindowForTile (int dx, int dy, int l) const
{
     return _inputFile->dataWindowForTile (dx, dy, l);
}


Imath::Box2i
TiledRgbaInputFile::dataWindowForTile (int dx, int dy, int lx, int ly) const
{
     return _inputFile->dataWindowForTile (dx, dy, lx, ly);
}


void
TiledRgbaInputFile::readTile (int dx, int dy, int l)
{
    if (_fromYa)
    {
	Lock lock (*_fromYa);
	_fromYa->readTile (dx, dy, l, l);
    }
    else
    {
	 _inputFile->readTile (dx, dy, l);
    }
}


void
TiledRgbaInputFile::readTile (int dx, int dy, int lx, int ly)
{
    if (_fromYa)
    {
	Lock lock (*_fromYa);
	_fromYa->readTile (dx, dy, lx, ly);
    }
    else
    {
	 _inputFile->readTile (dx, dy, lx, ly);
    }
}


void	
TiledRgbaInputFile::readTiles (int dxMin, int dxMax, int dyMin, int dyMax,
                               int lx, int ly)
{
    if (_fromYa)
    {
	Lock lock (*_fromYa);

        for (int dy = dyMin; dy <= dyMax; dy++)
            for (int dx = dxMin; dx <= dxMax; dx++)
	        _fromYa->readTile (dx, dy, lx, ly);
    }
    else
    {
        _inputFile->readTiles (dxMin, dxMax, dyMin, dyMax, lx, ly);
    }
}

void	
TiledRgbaInputFile::readTiles (int dxMin, int dxMax, int dyMin, int dyMax,
                               int l)
{
    readTiles (dxMin, dxMax, dyMin, dyMax, l, l);
}


void		
TiledRgbaOutputFile::updatePreviewImage (const PreviewRgba newPixels[])
{
    _outputFile->updatePreviewImage (newPixels);
}


void	
TiledRgbaOutputFile::breakTile  (int dx, int dy, int lx, int ly,
				 int offset, int length, char c)
{
    _outputFile->breakTile (dx, dy, lx, ly, offset, length, c);
}


} // namespace Imf