qtiffhandler.cpp File Reference

#include "qtiffhandler_p.h"
#include <qvariant.h>
#include <qdebug.h>
#include <qimage.h>
#include <qglobal.h>
#include "tiffio.h"

Go to the source code of this file.

Functions
static bool	checkGrayscale (const QVector< QRgb > &colorTable)
int	qtiffCloseProc (thandle_t)
int	qtiffMapProc (thandle_t, tdata_t *, toff_t *)
tsize_t	qtiffReadProc (thandle_t fd, tdata_t buf, tsize_t size)
toff_t	qtiffSeekProc (thandle_t fd, toff_t off, int whence)
toff_t	qtiffSizeProc (thandle_t fd)
void	qtiffUnmapProc (thandle_t, tdata_t, toff_t)
tsize_t	qtiffWriteProc (thandle_t fd, tdata_t buf, tsize_t size)
void	rotate_right_mirror_horizontal (QImage *const image)
void	rotate_right_mirror_vertical (QImage *const image)

Function Documentation

checkGrayscale()

static bool checkGrayscale ( const QVector< QRgb > &  colorTable )

static

Definition at line 391 of file qtiffhandler.cpp.

Referenced by QTiffHandler::write().

{
    if (colorTable.size() != 256)
        return false;

    const bool increasing = (colorTable.at(0) == 0xff000000);
    for (int i = 0; i < 256; ++i) {
        if ((increasing && colorTable.at(i) != qRgb(i, i, i))
            || (!increasing && colorTable.at(i) != qRgb(255 - i, 255 - i, 255 - i)))
            return false;
    }
    return true;
}

qtiffCloseProc()

int qtiffCloseProc

(

thandle_t

)

Definition at line 82 of file qtiffhandler.cpp.

Referenced by QTiffHandler::option(), QTiffHandler::read(), and QTiffHandler::write().

{
    return 0;
}

qtiffMapProc()

int qtiffMapProc	(	thandle_t	,
		tdata_t *	,
		toff_t *
	)

Definition at line 92 of file qtiffhandler.cpp.

Referenced by QTiffHandler::option(), QTiffHandler::read(), and QTiffHandler::write().

{
    return 0;
}

qtiffReadProc()

tsize_t qtiffReadProc	(	thandle_t	fd,
		tdata_t	buf,
		tsize_t	size
	)

Definition at line 53 of file qtiffhandler.cpp.

Referenced by QTiffHandler::option(), QTiffHandler::read(), and QTiffHandler::write().

{
    QIODevice* device = static_cast<QTiffHandler*>(fd)->device();
    return device->isReadable() ? device->read(static_cast<char *>(buf), size) : -1;
}

qtiffSeekProc()

toff_t qtiffSeekProc	(	thandle_t	fd,
		toff_t	off,
		int	whence
	)

Definition at line 64 of file qtiffhandler.cpp.

Referenced by QTiffHandler::option(), QTiffHandler::read(), and QTiffHandler::write().

{
    QIODevice *device = static_cast<QTiffHandler*>(fd)->device();
    switch (whence) {
    case SEEK_SET:
        device->seek(off);
        break;
    case SEEK_CUR:
        device->seek(device->pos() + off);
        break;
    case SEEK_END:
        device->seek(device->size() + off);
        break;
    }

    return device->pos();
}

qtiffSizeProc()

toff_t qtiffSizeProc

(

thandle_t

fd

)

Definition at line 87 of file qtiffhandler.cpp.

Referenced by QTiffHandler::option(), QTiffHandler::read(), and QTiffHandler::write().

{
    return static_cast<QTiffHandler*>(fd)->device()->size();
}

qtiffUnmapProc()

void qtiffUnmapProc	(	thandle_t	,
		tdata_t	,
		toff_t
	)

Definition at line 97 of file qtiffhandler.cpp.

Referenced by QTiffHandler::option(), QTiffHandler::read(), and QTiffHandler::write().

{
}

qtiffWriteProc()

tsize_t qtiffWriteProc	(	thandle_t	fd,
		tdata_t	buf,
		tsize_t	size
	)

Definition at line 59 of file qtiffhandler.cpp.

Referenced by QTiffHandler::option(), QTiffHandler::read(), and QTiffHandler::write().

{
    return static_cast<QTiffHandler*>(fd)->device()->write(static_cast<char *>(buf), size);
}

rotate_right_mirror_horizontal()

void rotate_right_mirror_horizontal ( QImage *const  image )

inline

Definition at line 102 of file qtiffhandler.cpp.

Referenced by QTiffHandler::read().

{
    const int height = image->height();
    const int width = image->width();
    QImage generated(/* width = */ height, /* height = */ width, image->format());
    const uint32 *originalPixel = reinterpret_cast<const uint32*>(image->bits());
    uint32 *const generatedPixels = reinterpret_cast<uint32*>(generated.bits());
    for (int row=0; row < height; ++row) {
        for (int col=0; col < width; ++col) {
            int idx = col * height + row;
            generatedPixels[idx] = *originalPixel;
            ++originalPixel;
        }
    }
    *image = generated;
}

rotate_right_mirror_vertical()

void rotate_right_mirror_vertical ( QImage *const  image )

inline

Definition at line 119 of file qtiffhandler.cpp.

Referenced by QTiffHandler::read().

{
    const int height = image->height();
    const int width = image->width();
    QImage generated(/* width = */ height, /* height = */ width, image->format());
    const int lastCol = width - 1;
    const int lastRow = height - 1;
    const uint32 *pixel = reinterpret_cast<const uint32*>(image->bits());
    uint32 *const generatedBits = reinterpret_cast<uint32*>(generated.bits());
    for (int row=0; row < height; ++row) {
        for (int col=0; col < width; ++col) {
            int idx = (lastCol - col) * height + (lastRow - row);
            generatedBits[idx] = *pixel;
            ++pixel;
        }
    }
    *image = generated;
}