Public Types
typedef void(*	WriterFunc )(const PixelWriter *iw, const osg::Vec4 &c, int s, int t, int r, int m)
Public Member Functions
	PixelWriter (osg::Image *image)
void	operator() (const osg::Vec4 &c, int s, int t, int r=0, int m=0)
unsigned char *	data (int s=0, int t=0, int r=0, int m=0) const
Static Public Member Functions
static bool	supports (GLenum pixelFormat, GLenum dataType)
static bool	supports (const osg::Image *image)
Public Attributes
osg::Image *	_image
unsigned	_colMult
unsigned	_rowMult
unsigned	_imageSize
WriterFunc	_writer

Detailed Description

Writes color data to an image, regardles of its internal pixel format.

Definition at line 238 of file ImageUtils.

Member Typedef Documentation

typedef void(* osgEarth::ImageUtils::PixelWriter::WriterFunc)(const PixelWriter *iw, const osg::Vec4 &c, int s, int t, int r, int m)

Definition at line 268 of file ImageUtils.

Constructor & Destructor Documentation

ImageUtils::PixelWriter::PixelWriter ( osg::Image * image )

Definition at line 1029 of file ImageUtils.cpp.

                                                  :
_image(image)
{
    _colMult = _image->getPixelSizeInBits() / 8;
    _rowMult = _image->getRowSizeInBytes();
    _imageSize = _image->getImageSizeInBytes();
    GLenum dataType = _image->getDataType();
    _writer = getWriter( _image->getPixelFormat(), dataType );
    if ( !_writer )
    {
        OE_WARN << "[PixelWriter] No writer found for pixel format " << std::hex << _image->getPixelFormat() << std::endl; 
        _writer = &ColorWriter<0, GLbyte>::write;
    }
}

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Member Function Documentation

unsigned char* osgEarth::ImageUtils::PixelWriter::data	(	int	s = `0`,
		int	t = `0`,
		int	r = `0`,
		int	m = `0`
	)		const `[inline]`

Definition at line 262 of file ImageUtils.

                                                                          {
                return m == 0 ?
                    _image->data() + s*_colMult + t*_rowMult + r*_imageSize :
                    _image->getMipmapData(m) + s*_colMult + t*(_rowMult >> m) + r*(_imageSize>>m);
            }

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void osgEarth::ImageUtils::PixelWriter::operator()	(	const osg::Vec4 &	c,
		int	s,
		int	t,
		int	r = `0`,
		int	m = `0`
	)		`[inline]`

Writes a color to a pixel.

Definition at line 252 of file ImageUtils.

                                                                              {
                (*_writer)(this, c, s, t, r, m );
            }

bool ImageUtils::PixelWriter::supports	(	GLenum	pixelFormat,
		GLenum	dataType
	)		`[static]`

Whether PixelWriter can write to an image with the given format/datatype combo.

Definition at line 1045 of file ImageUtils.cpp.

{
    return getWriter(pixelFormat, dataType) != 0L;
}

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static bool osgEarth::ImageUtils::PixelWriter::supports ( const osg::Image * image ) [inline, static]

Whether PixelWriter can write to non-const version of an image.

Definition at line 247 of file ImageUtils.

                                                          {
                return image && supports(image->getPixelFormat(), image->getDataType() );
            }