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/* */
/* Copyright 2001-2002 by Gunnar Kedenburg */
/* Copyright 2012 Christoph Spiel and Ullrich Koethe */
/* */
/* This file is part of the VIGRA computer vision library. */
/* The VIGRA Website is */
/* http://hci.iwr.uni-heidelberg.de/vigra/ */
/* Please direct questions, bug reports, and contributions to */
/* ullrich.koethe@iwr.uni-heidelberg.de or */
/* vigra@informatik.uni-hamburg.de */
/* */
/* Permission is hereby granted, free of charge, to any person */
/* obtaining a copy of this software and associated documentation */
/* files (the "Software"), to deal in the Software without */
/* restriction, including without limitation the rights to use, */
/* copy, modify, merge, publish, distribute, sublicense, and/or */
/* sell copies of the Software, and to permit persons to whom the */
/* Software is furnished to do so, subject to the following */
/* conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the */
/* Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES */
/* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND */
/* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT */
/* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, */
/* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING */
/* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR */
/* OTHER DEALINGS IN THE SOFTWARE. */
/* */
/************************************************************************/
/*!
* \file impex.hxx
* \brief image import and export functions
*
* This module implements functions importImage() and exportImage().
* The matching implementation for any given datatype is selected by
* template meta code.
*
*/
#ifndef VIGRA_IMPEX_HXX
#define VIGRA_IMPEX_HXX
#include "stdimage.hxx"
#include "imageinfo.hxx"
#include "impexbase.hxx"
namespace vigra
{
/** \addtogroup VigraImpex
* @{
*/
namespace detail
{
template <class ValueType,
class ImageIterator, class ImageAccessor>
void
read_image_band(Decoder* decoder,
ImageIterator image_iterator, ImageAccessor image_accessor)
{
typedef typename ImageIterator::row_iterator ImageRowIterator;
const unsigned width(decoder->getWidth());
const unsigned height(decoder->getHeight());
const unsigned offset(decoder->getOffset());
for (unsigned y = 0U; y != height; ++y)
{
decoder->nextScanline();
const ValueType* scanline = static_cast<const ValueType*>(decoder->currentScanlineOfBand(0));
ImageRowIterator is(image_iterator.rowIterator());
const ImageRowIterator is_end(is + width);
while (is != is_end)
{
image_accessor.set(*scanline, is);
scanline += offset;
++is;
}
++image_iterator.y;
}
}
template <class ValueType,
class ImageIterator, class ImageAccessor>
void
read_image_bands(Decoder* decoder,
ImageIterator image_iterator, ImageAccessor image_accessor)
{
typedef typename ImageIterator::row_iterator ImageRowIterator;
const unsigned width(decoder->getWidth());
const unsigned height(decoder->getHeight());
const unsigned offset(decoder->getOffset());
const unsigned accessor_size(image_accessor.size(image_iterator));
// OPTIMIZATION: Specialization for the most common case
// of an RGB-image, i.e. 3 channels.
if (accessor_size == 3U)
{
const ValueType* scanline_0;
const ValueType* scanline_1;
const ValueType* scanline_2;
for (unsigned y = 0U; y != height; ++y)
{
decoder->nextScanline();
scanline_0 = static_cast<const ValueType*>(decoder->currentScanlineOfBand(0));
scanline_1 = static_cast<const ValueType*>(decoder->currentScanlineOfBand(1));
scanline_2 = static_cast<const ValueType*>(decoder->currentScanlineOfBand(2));
ImageRowIterator is(image_iterator.rowIterator());
const ImageRowIterator is_end(is + width);
while (is != is_end)
{
image_accessor.setComponent(*scanline_0, is, 0);
image_accessor.setComponent(*scanline_1, is, 1);
image_accessor.setComponent(*scanline_2, is, 2);
scanline_0 += offset;
scanline_1 += offset;
scanline_2 += offset;
++is;
}
++image_iterator.y;
}
}
else
{
std::vector<const ValueType*> scanlines(accessor_size);
for (unsigned y = 0U; y != height; ++y)
{
decoder->nextScanline();
for (unsigned i = 0U; i != accessor_size; ++i)
{
scanlines[i] = static_cast<const ValueType*>(decoder->currentScanlineOfBand(i));
}
ImageRowIterator is(image_iterator.rowIterator());
const ImageRowIterator is_end(is + width);
while (is != is_end)
{
for (unsigned i = 0U; i != accessor_size; ++i)
{
image_accessor.setComponent(*scanlines[i], is, static_cast<int>(i));
scanlines[i] += offset;
}
++is;
}
++image_iterator.y;
}
}
}
template <class ImageIterator, class ImageAccessor>
void
importImage(const ImageImportInfo& import_info,
ImageIterator image_iterator, ImageAccessor image_accessor,
/* isScalar? */ VigraTrueType)
{
VIGRA_UNIQUE_PTR<Decoder> decoder(vigra::decoder(import_info));
switch (pixel_t_of_string(decoder->getPixelType()))
{
case UNSIGNED_INT_8:
read_image_band<UInt8>(decoder.get(), image_iterator, image_accessor);
break;
case UNSIGNED_INT_16:
read_image_band<UInt16>(decoder.get(), image_iterator, image_accessor);
break;
case UNSIGNED_INT_32:
read_image_band<UInt32>(decoder.get(), image_iterator, image_accessor);
break;
case SIGNED_INT_16:
read_image_band<Int16>(decoder.get(), image_iterator, image_accessor);
break;
case SIGNED_INT_32:
read_image_band<Int32>(decoder.get(), image_iterator, image_accessor);
break;
case IEEE_FLOAT_32:
read_image_band<float>(decoder.get(), image_iterator, image_accessor);
break;
case IEEE_FLOAT_64:
read_image_band<double>(decoder.get(), image_iterator, image_accessor);
break;
default:
vigra_fail("detail::importImage<scalar>: not reached");
}
decoder->close();
}
template <class ImageIterator, class ImageAccessor>
void
importImage(const ImageImportInfo& import_info,
ImageIterator image_iterator, ImageAccessor image_accessor,
/* isScalar? */ VigraFalseType)
{
VIGRA_UNIQUE_PTR<Decoder> decoder(vigra::decoder(import_info));
switch (pixel_t_of_string(decoder->getPixelType()))
{
case UNSIGNED_INT_8:
read_image_bands<UInt8>(decoder.get(), image_iterator, image_accessor);
break;
case UNSIGNED_INT_16:
read_image_bands<UInt16>(decoder.get(), image_iterator, image_accessor);
break;
case UNSIGNED_INT_32:
read_image_bands<UInt32>(decoder.get(), image_iterator, image_accessor);
break;
case SIGNED_INT_16:
read_image_bands<Int16>(decoder.get(), image_iterator, image_accessor);
break;
case SIGNED_INT_32:
read_image_bands<Int32>(decoder.get(), image_iterator, image_accessor);
break;
case IEEE_FLOAT_32:
read_image_bands<float>(decoder.get(), image_iterator, image_accessor);
break;
case IEEE_FLOAT_64:
read_image_bands<double>(decoder.get(), image_iterator, image_accessor);
break;
default:
vigra_fail("vigra::detail::importImage<non-scalar>: not reached");
}
decoder->close();
}
template<class ValueType,
class ImageIterator, class ImageAccessor, class ImageScaler>
void
write_image_band(Encoder* encoder,
ImageIterator image_upper_left, ImageIterator image_lower_right, ImageAccessor image_accessor,
const ImageScaler& image_scaler)
{
typedef typename ImageIterator::row_iterator ImageRowIterator;
typedef typename ImageAccessor::value_type ImageValueType;
typedef RequiresExplicitCast<ValueType> explicit_cast;
vigra_precondition(image_lower_right.x >= image_upper_left.x,
"vigra::detail::write_image_band: negative width");
vigra_precondition(image_lower_right.y >= image_upper_left.y,
"vigra::detail::write_image_band: negative height");
const unsigned width(static_cast<unsigned>(image_lower_right.x - image_upper_left.x));
const unsigned height(static_cast<unsigned>(image_lower_right.y - image_upper_left.y));
encoder->setWidth(width);
encoder->setHeight(height);
encoder->setNumBands(1);
encoder->finalizeSettings();
const unsigned offset(encoder->getOffset()); // correct offset only _after_ finalizeSettings()
// IMPLEMENTATION NOTE: We avoid calling the default
// constructor to allow classes ImageIterator that do not
// define one.
ImageIterator image_iterator(image_upper_left);
for (unsigned y = 0U; y != height; ++y)
{
ValueType* scanline = static_cast<ValueType*>(encoder->currentScanlineOfBand(0));
ImageRowIterator is(image_iterator.rowIterator());
const ImageRowIterator is_end(is + width);
while (is != is_end)
{
*scanline = explicit_cast::cast(image_scaler(image_accessor(is)));
scanline += offset;
++is;
}
encoder->nextScanline();
++image_iterator.y;
}
}
template<class ValueType,
class ImageIterator, class ImageAccessor, class ImageScaler>
void
write_image_bands(Encoder* encoder,
ImageIterator image_upper_left, ImageIterator image_lower_right, ImageAccessor image_accessor,
const ImageScaler& image_scaler)
{
typedef typename ImageIterator::row_iterator ImageRowIterator;
typedef RequiresExplicitCast<ValueType> explicit_cast;
vigra_precondition(image_lower_right.x >= image_upper_left.x,
"vigra::detail::write_image_bands: negative width");
vigra_precondition(image_lower_right.y >= image_upper_left.y,
"vigra::detail::write_image_bands: negative height");
const unsigned width(static_cast<unsigned>(image_lower_right.x - image_upper_left.x));
const unsigned height(static_cast<unsigned>(image_lower_right.y - image_upper_left.y));
const unsigned accessor_size(image_accessor.size(image_upper_left));
encoder->setWidth(width);
encoder->setHeight(height);
encoder->setNumBands(accessor_size);
encoder->finalizeSettings();
const unsigned offset(encoder->getOffset()); // correct offset only _after_ finalizeSettings()
// IMPLEMENTATION NOTE: We avoid calling the default
// constructor to allow classes ImageIterator that do not
// define one.
ImageIterator image_iterator(image_upper_left);
// OPTIMIZATION: Specialization for the most common case
// of an RGB-image, i.e. 3 channels.
if (accessor_size == 3U)
{
ValueType* scanline_0;
ValueType* scanline_1;
ValueType* scanline_2;
for (unsigned y = 0U; y != height; ++y)
{
scanline_0 = static_cast<ValueType*>(encoder->currentScanlineOfBand(0));
scanline_1 = static_cast<ValueType*>(encoder->currentScanlineOfBand(1));
scanline_2 = static_cast<ValueType*>(encoder->currentScanlineOfBand(2));
ImageRowIterator is(image_iterator.rowIterator());
const ImageRowIterator is_end(is + width);
while (is != is_end)
{
*scanline_0 = explicit_cast::cast(image_scaler(image_accessor.getComponent(is, 0)));
*scanline_1 = explicit_cast::cast(image_scaler(image_accessor.getComponent(is, 1)));
*scanline_2 = explicit_cast::cast(image_scaler(image_accessor.getComponent(is, 2)));
scanline_0 += offset;
scanline_1 += offset;
scanline_2 += offset;
++is;
}
encoder->nextScanline();
++image_iterator.y;
}
}
else
{
std::vector<ValueType*> scanlines(accessor_size);
for (unsigned y = 0U; y != height; ++y)
{
for (unsigned i = 0U; i != accessor_size; ++i)
{
scanlines[i] = static_cast<ValueType*>(encoder->currentScanlineOfBand(i));
}
ImageRowIterator is(image_iterator.rowIterator());
const ImageRowIterator is_end(is + width);
while (is != is_end)
{
for (unsigned i = 0U; i != accessor_size; ++i)
{
*scanlines[i] = explicit_cast::cast(image_scaler(image_accessor.getComponent(is, static_cast<int>(i))));
scanlines[i] += offset;
}
++is;
}
encoder->nextScanline();
++image_iterator.y;
}
}
}
template <class ImageIterator, class ImageAccessor>
void
exportImage(ImageIterator image_upper_left, ImageIterator image_lower_right, ImageAccessor image_accessor,
const ImageExportInfo& export_info,
/* isScalar? */ VigraTrueType)
{
typedef typename ImageAccessor::value_type ImageValueType;
VIGRA_UNIQUE_PTR<Encoder> encoder(vigra::encoder(export_info));
std::string pixel_type(export_info.getPixelType());
const bool downcast(negotiatePixelType(encoder->getFileType(), TypeAsString<ImageValueType>::result(), pixel_type));
const pixel_t type(pixel_t_of_string(pixel_type));
encoder->setPixelType(pixel_type);
const range_t image_source_range(find_source_value_range(export_info,
image_upper_left, image_lower_right, image_accessor));
const range_t destination_range(find_destination_value_range(export_info, type));
if ((downcast || export_info.hasForcedRangeMapping()) &&
(image_source_range.first != destination_range.first || image_source_range.second != destination_range.second))
{
const linear_transform image_rescaler(image_source_range, destination_range);
switch (type)
{
case UNSIGNED_INT_8:
write_image_band<UInt8>(encoder.get(),
image_upper_left, image_lower_right, image_accessor, image_rescaler);
break;
case UNSIGNED_INT_16:
write_image_band<UInt16>(encoder.get(),
image_upper_left, image_lower_right, image_accessor, image_rescaler);
break;
case UNSIGNED_INT_32:
write_image_band<UInt32>(encoder.get(),
image_upper_left, image_lower_right, image_accessor, image_rescaler);
break;
case SIGNED_INT_16:
write_image_band<Int16>(encoder.get(),
image_upper_left, image_lower_right, image_accessor, image_rescaler);
break;
case SIGNED_INT_32:
write_image_band<Int32>(encoder.get(),
image_upper_left, image_lower_right, image_accessor, image_rescaler);
break;
case IEEE_FLOAT_32:
write_image_band<float>(encoder.get(),
image_upper_left, image_lower_right, image_accessor, image_rescaler);
break;
case IEEE_FLOAT_64:
write_image_band<double>(encoder.get(),
image_upper_left, image_lower_right, image_accessor, image_rescaler);
break;
default:
vigra_fail("vigra::detail::exportImage<scalar>: not reached");
}
}
else
{
switch (type)
{
case UNSIGNED_INT_8:
write_image_band<UInt8>(encoder.get(),
image_upper_left, image_lower_right, image_accessor, identity());
break;
case UNSIGNED_INT_16:
write_image_band<UInt16>(encoder.get(),
image_upper_left, image_lower_right, image_accessor, identity());
break;
case UNSIGNED_INT_32:
write_image_band<UInt32>(encoder.get(),
image_upper_left, image_lower_right, image_accessor, identity());
break;
case SIGNED_INT_16:
write_image_band<Int16>(encoder.get(),
image_upper_left, image_lower_right, image_accessor, identity());
break;
case SIGNED_INT_32:
write_image_band<Int32>(encoder.get(),
image_upper_left, image_lower_right, image_accessor, identity());
break;
case IEEE_FLOAT_32:
write_image_band<float>(encoder.get(),
image_upper_left, image_lower_right, image_accessor, identity());
break;
case IEEE_FLOAT_64:
write_image_band<double>(encoder.get(),
image_upper_left, image_lower_right, image_accessor, identity());
break;
default:
vigra_fail("vigra::detail::exportImage<scalar>: not reached");
}
}
encoder->close();
}
template <class ImageIterator, class ImageAccessor>
void
exportImage(ImageIterator image_upper_left, ImageIterator image_lower_right, ImageAccessor image_accessor,
const ImageExportInfo& export_info,
/* isScalar? */ VigraFalseType)
{
typedef typename ImageAccessor::value_type ImageBaseType;
typedef typename ImageBaseType::value_type ImageValueType;
VIGRA_UNIQUE_PTR<Encoder> encoder(vigra::encoder(export_info));
std::string pixel_type(export_info.getPixelType());
const bool downcast(negotiatePixelType(encoder->getFileType(), TypeAsString<ImageValueType>::result(), pixel_type));
const pixel_t type(pixel_t_of_string(pixel_type));
encoder->setPixelType(pixel_type);
vigra_precondition(isBandNumberSupported(encoder->getFileType(), image_accessor.size(image_upper_left)),
"exportImage(): file format does not support requested number of bands (color channels)");
const range_t image_source_range(find_source_value_range(export_info,
image_upper_left, image_lower_right, image_accessor));
const range_t destination_range(find_destination_value_range(export_info, pixel_t_of_string(pixel_type)));
if ((downcast || export_info.hasForcedRangeMapping()) &&
(image_source_range.first != destination_range.first || image_source_range.second != destination_range.second))
{
const linear_transform image_rescaler(image_source_range, destination_range);
switch (type)
{
case UNSIGNED_INT_8:
write_image_bands<UInt8>(encoder.get(),
image_upper_left, image_lower_right, image_accessor, image_rescaler);
break;
case UNSIGNED_INT_16:
write_image_bands<UInt16>(encoder.get(),
image_upper_left, image_lower_right, image_accessor, image_rescaler);
break;
case UNSIGNED_INT_32:
write_image_bands<UInt32>(encoder.get(),
image_upper_left, image_lower_right, image_accessor, image_rescaler);
break;
case SIGNED_INT_16:
write_image_bands<Int16>(encoder.get(),
image_upper_left, image_lower_right, image_accessor, image_rescaler);
break;
case SIGNED_INT_32:
write_image_bands<Int32>(encoder.get(),
image_upper_left, image_lower_right, image_accessor, image_rescaler);
break;
case IEEE_FLOAT_32:
write_image_bands<float>(encoder.get(),
image_upper_left, image_lower_right, image_accessor, image_rescaler);
break;
case IEEE_FLOAT_64:
write_image_bands<double>(encoder.get(),
image_upper_left, image_lower_right, image_accessor, image_rescaler);
break;
default:
vigra_fail("vigra::detail::exportImage<non-scalar>: not reached");
}
}
else
{
switch (type)
{
case UNSIGNED_INT_8:
write_image_bands<UInt8>(encoder.get(),
image_upper_left, image_lower_right, image_accessor, identity());
break;
case UNSIGNED_INT_16:
write_image_bands<UInt16>(encoder.get(),
image_upper_left, image_lower_right, image_accessor, identity());
break;
case UNSIGNED_INT_32:
write_image_bands<UInt32>(encoder.get(),
image_upper_left, image_lower_right, image_accessor, identity());
break;
case SIGNED_INT_16:
write_image_bands<Int16>(encoder.get(),
image_upper_left, image_lower_right, image_accessor, identity());
break;
case SIGNED_INT_32:
write_image_bands<Int32>(encoder.get(),
image_upper_left, image_lower_right, image_accessor, identity());
break;
case IEEE_FLOAT_32:
write_image_bands<float>(encoder.get(),
image_upper_left, image_lower_right, image_accessor, identity());
break;
case IEEE_FLOAT_64:
write_image_bands<double>(encoder.get(),
image_upper_left, image_lower_right, image_accessor, identity());
break;
default:
vigra_fail("vigra::detail::exportImage<non-scalar>: not reached");
}
}
encoder->close();
}
} // end namespace detail
/*!
* \brief Read the image specified by the given \ref
* vigra::ImageImportInfo object.
*
* <B>Declarations</B>
*
* Pass arguments explicitly:
* \code
* namespace vigra {
* template <class ImageIterator, class Accessor>
* void
* importImage(const ImageImportInfo& importInfo,
* ImageIterator imageIterator, Accessor imageAccessor)
* }
* \endcode
*
* Use argument objects in conjunction with \ref ArgumentObjectFactories :
* \code
* namespace vigra {
* template <class ImageIterator, class Accessor>
* inline void
* importImage(const ImageImportInfo& importInfo,
* const pair<ImageIterator, Accessor>& image)
* }
* \endcode
*
* <B>Usage</B>
*
* <B>\#include \<vigra/impex.hxx\></B>
*
* Namespace: vigra
*
* \code
* ImageImportInfo info("myimage.gif");
*
* if (info.isGrayscale())
* {
* // create byte image of appropriate size
* BImage image(info.width(), info.height());
*
* importImage(info, destImage(image));
* ...
* }
* else
* {
* // create byte RGB image of appropriate size
* BRGBImage image(info.width(), info.height());
*
* importImage(info, destImage(image));
* ...
* }
* \endcode
*
* <B>Preconditions</B>
*
* - The image file must be readable and
* - the file type must be one of the following:
*
* | Type | Extension | Name | Support Library |
* |------|-----------|------------------------------------------------------------|-----------------|
* | BMP | bmp | Microsoft Windows bitmap image file | |
* | EXR | exr | OpenEXR high dynamic range image format | libopenexr |
* | GIF | gif | CompuServe graphics interchange format, 8-bit color | |
* | HDR | hdr | Radiance RGBE high dynamic range image format | libexr? |
* | JPEG | jpg, jpeg | Joint Photographic Experts Group JFIF format, 24-bit color | libjpeg |
* | PBM | pbm | Portable bitmap format (black and white) | |
* | PGM | pgm | Portable graymap format (gray scale) | |
* | PNG | png | Portable Network Graphic | libpng |
* | PNM | pnm | Portable anymap | |
* | PPM | ppm | Portable pixmap format (color) | |
* | SUN | ras | SUN Rasterfile | |
* | TIFF | tif, tiff | Tagged Image File Format | libtiff |
* | VIFF | xv | Khoros Visualization image file | |
*/
doxygen_overloaded_function(template <...> inline void importImage)
template <class ImageIterator, class ImageAccessor>
inline void
importImage(const ImageImportInfo& import_info,
ImageIterator image_iterator, ImageAccessor image_accessor)
{
typedef typename ImageAccessor::value_type ImageValueType;
typedef typename NumericTraits<ImageValueType>::isScalar is_scalar;
detail::importImage(import_info,
image_iterator, image_accessor,
is_scalar());
}
template <class ImageIterator, class ImageAccessor>
inline void
importImage(const ImageImportInfo& import_info,
const vigra::pair<ImageIterator, ImageAccessor>& image)
{
importImage(import_info,
image.first, image.second);
}
/*!
* \brief Write an image given a \ref vigra::ImageExportInfo object.
*
* If the file format to be exported to supports the pixel type of
* the source image, the pixel type will be kept
* (e.g. <tt>float</tt> can be stored as TIFF without conversion,
* in contrast to most other image export toolkits). Otherwise,
* the pixel values are transformed to the range 0..255 and
* converted to <tt>unsigned char</tt>. Currently, the following
* file formats are supported. The pixel types given in brackets
* are those that are written without conversion:
* - BMP: Microsoft Windows bitmap image file (pixel types: UINT8 as gray and RGB);
* - GIF: CompuServe graphics interchange format, 8-bit color (pixel types: UINT8 as gray and RGB);
* - JPEG: Joint Photographic Experts Group JFIF format, compressed 24-bit color
* (pixel types: UINT8 as gray and RGB), only available if libjpeg is installed;
* - PNG: Portable Network Graphic (pixel types: UINT8 and UINT16 with up to 4 channels),
* only available if libpng is installed;
* - PBM: Portable bitmap format (black and white);
* - PGM: Portable graymap format (pixel types: UINT8, INT16, INT32 as gray scale);
* - PNM: Portable anymap (pixel types: UINT8, INT16, INT32 as gray and RGB);
* - PPM: Portable pixmap format (pixel types: UINT8, INT16, INT32 as RGB);
* - SUN: SUN Rasterfile (pixel types: UINT8 as gray and RGB);
* - TIFF: Tagged Image File Format
* (pixel types: UINT8, INT16, INT32, FLOAT, DOUBLE with up to 4 channels),
* only available if libtiff is installed;
* - VIFF: Khoros Visualization image file
* (pixel types: UINT8, INT16, INT32, FLOAT, DOUBLE with arbitrary many channels);
*
* <B>Declarations</B>
*
* Pass arguments explicitly:
* \code
* namespace vigra {
* template <class ImageIterator, class ImageAccessor>
* void
* exportImage(ImageIterator imageUpperLeft, ImageIterator imageLowerRight, ImageAccessor imageAccessor,
* const ImageExportInfo& exportInfo)
* }
* \endcode
*
* Use argument objects in conjunction with \ref ArgumentObjectFactories :
* \code
* namespace vigra {
* template <class ImageIterator, class ImageAccessor>
* void exportImage(ImageIterator imageUpperLeft, ImageIterator imageLowerRight, ImageAccessor imageAccessor,
* const ImageExportInfo& exportInfo)
* }
* \endcode
*
* <B>Usage</B>
*
* <B>\#include \<vigra/impex.hxx\></B>
*
* Namespace: vigra
* \code
* BRGBImage image(width, height);
* ...
*
* // write as JPEG image, using compression quality 80
* exportImage(srcImageRange(image),
* ImageExportInfo("my-image.jpg").setCompression("80"));
*
* // Force it to a particular pixel type. The pixel type must be supported by the
* // desired image file format, otherwise an \ref vigra::PreconditionViolation
* // exception will be thrown.
* exportImage(srcImageRange(image),
* ImageExportInfo("my-INT16-image.tif").setPixelType("INT16"));
* \endcode
*
* <B>Preconditions</B>
*
* - The image file must be writable and
* - the file type must be one of the supported file types.
*/
doxygen_overloaded_function(template <...> inline void exportImage)
template <class ImageIterator, class ImageAccessor>
inline void
exportImage(ImageIterator image_upper_left, ImageIterator image_lower_right, ImageAccessor image_accessor,
const ImageExportInfo& export_info)
{
typedef typename ImageAccessor::value_type ImageValueType;
typedef typename NumericTraits<ImageValueType>::isScalar is_scalar;
try
{
detail::exportImage(image_upper_left, image_lower_right, image_accessor,
export_info,
is_scalar());
}
catch (Encoder::TIFFCompressionException&)
{
ImageExportInfo info(export_info);
info.setCompression("");
detail::exportImage(image_upper_left, image_lower_right, image_accessor,
info,
is_scalar());
}
}
template <class ImageIterator, class ImageAccessor>
inline void
exportImage(const vigra::triple<ImageIterator, ImageIterator, ImageAccessor>& image,
const ImageExportInfo& export_info)
{
exportImage(image.first, image.second, image.third,
export_info);
}
/** @} */
} // end namespace vigra
#endif // VIGRA_IMPEX_HXX
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