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-/*
- Copyright 2005-2007 Adobe Systems Incorporated
-
- Use, modification and distribution are subject to the Boost Software License,
- Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
- http://www.boost.org/LICENSE_1_0.txt).
-
- See http://opensource.adobe.com/gil for most recent version including documentation.
-*/
-
-/*************************************************************************************************/
-
-#ifndef GIL_JPEG_IO_H
-#define GIL_JPEG_IO_H
-
-/// \file
-/// \brief Support for reading and writing JPEG files
-/// Requires libjpeg
-/// \author Hailin Jin and Lubomir Bourdev \n
-/// Adobe Systems Incorporated
-/// \date 2005-2007 \n Last updated September 24, 2006
-
-#include <cstdio>
-#include <algorithm>
-#include <string>
-#include <boost/static_assert.hpp>
-#include <boost/shared_ptr.hpp>
-extern "C" {
-#include <jpeglib.h>
-}
-#include "io_error.hpp"
-#include "jpeg_io_private.hpp"
-
-namespace boost { namespace gil {
-
-/// \ingroup JPEG_IO
-/// \brief Determines whether the given view type is supported for reading
-template <typename View>
-struct jpeg_read_support {
- BOOST_STATIC_CONSTANT(bool,is_supported=
- (detail::jpeg_read_support_private<typename channel_type<View>::type,
- typename color_space_type<View>::type>::is_supported));
- BOOST_STATIC_CONSTANT(J_COLOR_SPACE,color_type=
- (detail::jpeg_read_support_private<typename channel_type<View>::type,
- typename color_space_type<View>::type>::color_type));
- BOOST_STATIC_CONSTANT(bool, value=is_supported);
-};
-
-/// \ingroup JPEG_IO
-/// \brief Returns the width and height of the JPEG file at the specified location.
-/// Throws std::ios_base::failure if the location does not correspond to a valid JPEG file
-inline point2<std::ptrdiff_t> jpeg_read_dimensions(const char* filename) {
- detail::jpeg_reader m(filename);
- return m.get_dimensions();
-}
-
-/// \ingroup JPEG_IO
-/// \brief Returns the width and height of the JPEG file at the specified location.
-/// Throws std::ios_base::failure if the location does not correspond to a valid JPEG file
-inline point2<std::ptrdiff_t> jpeg_read_dimensions(const std::string& filename) {
- return jpeg_read_dimensions(filename.c_str());
-}
-
-/// \ingroup JPEG_IO
-/// \brief Loads the image specified by the given jpeg image file name into the given view.
-/// Triggers a compile assert if the view color space and channel depth are not supported by the JPEG library or by the I/O extension.
-/// Throws std::ios_base::failure if the file is not a valid JPEG file, or if its color space or channel depth are not
-/// compatible with the ones specified by View, or if its dimensions don't match the ones of the view.
-template <typename View>
-inline void jpeg_read_view(const char* filename,const View& view) {
- BOOST_STATIC_ASSERT(jpeg_read_support<View>::is_supported);
-
- detail::jpeg_reader m(filename);
- m.apply(view);
-}
-
-/// \ingroup JPEG_IO
-/// \brief Loads the image specified by the given jpeg image file name into the given view.
-template <typename View>
-inline void jpeg_read_view(const std::string& filename,const View& view) {
- jpeg_read_view(filename.c_str(),view);
-}
-
-/// \ingroup JPEG_IO
-/// \brief Allocates a new image whose dimensions are determined by the given jpeg image file, and loads the pixels into it.
-/// Triggers a compile assert if the image color space or channel depth are not supported by the JPEG library or by the I/O extension.
-/// Throws std::ios_base::failure if the file is not a valid JPEG file, or if its color space or channel depth are not
-/// compatible with the ones specified by Image
-template <typename Image>
-inline void jpeg_read_image(const char* filename,Image& im) {
- BOOST_STATIC_ASSERT(jpeg_read_support<typename Image::view_t>::is_supported);
-
- detail::jpeg_reader m(filename);
- m.read_image(im);
-}
-
-/// \ingroup JPEG_IO
-/// \brief Allocates a new image whose dimensions are determined by the given jpeg image file, and loads the pixels into it.
-template <typename Image>
-inline void jpeg_read_image(const std::string& filename,Image& im) {
- jpeg_read_image(filename.c_str(),im);
-}
-
-/// \ingroup JPEG_IO
-/// \brief Loads and color-converts the image specified by the given jpeg image file name into the given view.
-/// Throws std::ios_base::failure if the file is not a valid JPEG file, or if its dimensions don't match the ones of the view.
-template <typename View,typename CC>
-inline void jpeg_read_and_convert_view(const char* filename,const View& view,CC cc) {
- detail::jpeg_reader_color_convert<CC> m(filename,cc);
- m.apply(view);
-}
-
-/// \ingroup JPEG_IO
-/// \brief Loads and color-converts the image specified by the given jpeg image file name into the given view.
-/// Throws std::ios_base::failure if the file is not a valid JPEG file, or if its dimensions don't match the ones of the view.
-template <typename View>
-inline void jpeg_read_and_convert_view(const char* filename,const View& view) {
- detail::jpeg_reader_color_convert<default_color_converter> m(filename,default_color_converter());
- m.apply(view);
-}
-
-/// \ingroup JPEG_IO
-/// \brief Loads and color-converts the image specified by the given jpeg image file name into the given view.
-template <typename View,typename CC>
-inline void jpeg_read_and_convert_view(const std::string& filename,const View& view,CC cc) {
- jpeg_read_and_convert_view(filename.c_str(),view);
-}
-
-/// \ingroup JPEG_IO
-/// \brief Loads and color-converts the image specified by the given jpeg image file name into the given view.
-template <typename View>
-inline void jpeg_read_and_convert_view(const std::string& filename,const View& view) {
- jpeg_read_and_convert_view(filename.c_str(),view);
-}
-
-/// \ingroup JPEG_IO
-/// \brief Allocates a new image whose dimensions are determined by the given jpeg image file, loads and color-converts the pixels into it.
-/// Throws std::ios_base::failure if the file is not a valid JPEG file
-template <typename Image,typename CC>
-inline void jpeg_read_and_convert_image(const char* filename,Image& im,CC cc) {
- detail::jpeg_reader_color_convert<CC> m(filename,cc);
- m.read_image(im);
-}
-
-/// \ingroup JPEG_IO
-/// \brief Allocates a new image whose dimensions are determined by the given jpeg image file, loads and color-converts the pixels into it.
-/// Throws std::ios_base::failure if the file is not a valid JPEG file
-template <typename Image>
-inline void jpeg_read_and_convert_image(const char* filename,Image& im) {
- detail::jpeg_reader_color_convert<default_color_converter> m(filename,default_color_converter());
- m.read_image(im);
-}
-
-/// \ingroup JPEG_IO
-/// \brief Allocates a new image whose dimensions are determined by the given jpeg image file, loads and color-converts the pixels into it.
-template <typename Image,typename CC>
-inline void jpeg_read_and_convert_image(const std::string& filename,Image& im,CC cc) {
- jpeg_read_and_convert_image(filename.c_str(),im);
-}
-
-/// \ingroup JPEG_IO
-/// \brief Allocates a new image whose dimensions are determined by the given jpeg image file, loads and color-converts the pixels into it.
-template <typename Image>
-inline void jpeg_read_and_convert_image(const std::string& filename,Image& im) {
- jpeg_read_and_convert_image(filename.c_str(),im);
-}
-
-/// \ingroup JPEG_IO
-/// \brief Determines whether the given view type is supported for writing
-template <typename View>
-struct jpeg_write_support {
- BOOST_STATIC_CONSTANT(bool,is_supported=
- (detail::jpeg_write_support_private<typename channel_type<View>::type,
- typename color_space_type<View>::type>::is_supported));
- BOOST_STATIC_CONSTANT(J_COLOR_SPACE,color_type=
- (detail::jpeg_write_support_private<typename channel_type<View>::type,
- typename color_space_type<View>::type>::color_type));
- BOOST_STATIC_CONSTANT(bool, value=is_supported);
-};
-
-/// \ingroup JPEG_IO
-/// \brief Saves the view to a jpeg file specified by the given jpeg image file name.
-/// Triggers a compile assert if the view color space and channel depth are not supported by the JPEG library or by the I/O extension.
-/// Throws std::ios_base::failure if it fails to create the file.
-template <typename View>
-inline void jpeg_write_view(const char* filename,const View& view,int quality=100) {
- BOOST_STATIC_ASSERT(jpeg_write_support<View>::is_supported);
-
- detail::jpeg_writer m(filename);
- m.apply(view,quality);
-}
-
-/// \ingroup JPEG_IO
-/// \brief Saves the view to a jpeg file specified by the given jpeg image file name.
-template <typename View>
-inline void jpeg_write_view(const std::string& filename,const View& view,int quality=100) {
- jpeg_write_view(filename.c_str(),view,quality);
-}
-
-} } // namespace boost::gil
-
-#endif
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