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<h1>png_io.hpp</h1><a href="png__io_8hpp.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*</span>
<a name="l00002"></a>00002 <span class="comment"> Copyright 2005-2007 Adobe Systems Incorporated</span>
<a name="l00003"></a>00003 <span class="comment"> </span>
<a name="l00004"></a>00004 <span class="comment"> Use, modification and distribution are subject to the Boost Software License,</span>
<a name="l00005"></a>00005 <span class="comment"> Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at</span>
<a name="l00006"></a>00006 <span class="comment"> http://www.boost.org/LICENSE_1_0.txt).</span>
<a name="l00007"></a>00007 <span class="comment"></span>
<a name="l00008"></a>00008 <span class="comment"> See http://opensource.adobe.com/gil for most recent version including documentation.</span>
<a name="l00009"></a>00009 <span class="comment">*/</span>
<a name="l00010"></a>00010
<a name="l00011"></a>00011 <span class="comment">/*************************************************************************************************/</span>
<a name="l00012"></a>00012
<a name="l00013"></a>00013 <span class="preprocessor">#ifndef GIL_PNG_IO_H</span>
<a name="l00014"></a>00014 <span class="preprocessor"></span><span class="preprocessor">#define GIL_PNG_IO_H</span>
<a name="l00015"></a>00015 <span class="preprocessor"></span>
<a name="l00019"></a>00019 <span class="comment">//</span>
<a name="l00020"></a>00020 <span class="comment">// We are currently providing the following functions:</span>
<a name="l00021"></a>00021 <span class="comment">// point2<std::ptrdiff_t> png_read_dimensions(const char*)</span>
<a name="l00022"></a>00022 <span class="comment">// template <typename View> void png_read_view(const char*,const View&)</span>
<a name="l00023"></a>00023 <span class="comment">// template <typename View> void png_read_image(const char*,image<View>&)</span>
<a name="l00024"></a>00024 <span class="comment">// template <typename View> void png_write_view(const char*,const View&)</span>
<a name="l00025"></a>00025 <span class="comment">// template <typename View> struct png_read_support;</span>
<a name="l00026"></a>00026 <span class="comment">// template <typename View> struct png_write_support;</span>
<a name="l00027"></a>00027 <span class="comment">//</span>
<a name="l00031"></a>00031 <span class="comment"></span>
<a name="l00032"></a>00032 <span class="preprocessor">#include <stdio.h></span>
<a name="l00033"></a>00033 <span class="preprocessor">#include <string></span>
<a name="l00034"></a>00034 <span class="keyword">extern</span> <span class="stringliteral">"C"</span> {
<a name="l00035"></a>00035 <span class="preprocessor">#include "png.h"</span>
<a name="l00036"></a>00036 }
<a name="l00037"></a>00037 <span class="preprocessor">#include <boost/static_assert.hpp></span>
<a name="l00038"></a>00038 <span class="preprocessor">#include "../../gil_config.hpp"</span>
<a name="l00039"></a>00039 <span class="preprocessor">#include "../../utilities.hpp"</span>
<a name="l00040"></a>00040 <span class="preprocessor">#include "<a class="code" href="io__error_8hpp.html" title="Handle input-output errors.">io_error.hpp</a>"</span>
<a name="l00041"></a>00041 <span class="preprocessor">#include "<a class="code" href="g_i_l_0254.html" title="Internal support for reading and writing PNG files.">png_io_private.hpp</a>"</span>
<a name="l00042"></a>00042
<a name="l00043"></a>00043 <span class="keyword">namespace </span>boost { <span class="keyword">namespace </span>gil {
<a name="l00044"></a>00044
<a name="l00048"></a><a class="code" href="g_i_l_0174.html#g7a75144b324bb509ca6a5803b8669310">00048</a> <span class="keyword">inline</span> <a class="code" href="g_i_l_0060.html" title="2D point both axes of which have the same dimension typeModels: Point2DConcept">point2<std::ptrdiff_t></a> <a class="code" href="g_i_l_0174.html#g5c20a2a469cdec4f530e02acab11e53e" title="Returns the width and height of the PNG file at the specified location. Throws std::ios_base::failur...">png_read_dimensions</a>(<span class="keyword">const</span> <span class="keywordtype">char</span> *filename) {
<a name="l00049"></a>00049 detail::png_reader m(filename);
<a name="l00050"></a>00050 <span class="keywordflow">return</span> m.get_dimensions();
<a name="l00051"></a>00051 }
<a name="l00052"></a>00052
<a name="l00056"></a><a class="code" href="g_i_l_0174.html#g5c20a2a469cdec4f530e02acab11e53e">00056</a> <span class="keyword">inline</span> <a class="code" href="g_i_l_0060.html" title="2D point both axes of which have the same dimension typeModels: Point2DConcept">point2<std::ptrdiff_t></a> <a class="code" href="g_i_l_0174.html#g5c20a2a469cdec4f530e02acab11e53e" title="Returns the width and height of the PNG file at the specified location. Throws std::ios_base::failur...">png_read_dimensions</a>(<span class="keyword">const</span> std::string& filename) {
<a name="l00057"></a>00057 <span class="keywordflow">return</span> <a class="code" href="g_i_l_0174.html#g5c20a2a469cdec4f530e02acab11e53e" title="Returns the width and height of the PNG file at the specified location. Throws std::ios_base::failur...">png_read_dimensions</a>(filename.c_str());
<a name="l00058"></a>00058 }
<a name="l00059"></a>00059
<a name="l00062"></a>00062 <span class="keyword">template</span> <<span class="keyword">typename</span> View>
<a name="l00063"></a><a class="code" href="g_i_l_0613.html">00063</a> <span class="keyword">struct </span><a class="code" href="g_i_l_0613.html" title="Determines whether the given view type is supported for reading.">png_read_support</a> {
<a name="l00064"></a>00064 BOOST_STATIC_CONSTANT(<span class="keywordtype">bool</span>,is_supported=
<a name="l00065"></a>00065 (detail::png_read_support_private<<span class="keyword">typename</span> channel_type<View>::type,
<a name="l00066"></a>00066 <span class="keyword">typename</span> color_space_type<View>::type>::is_supported));
<a name="l00067"></a>00067 BOOST_STATIC_CONSTANT(<span class="keywordtype">int</span>,bit_depth=
<a name="l00068"></a>00068 (detail::png_read_support_private<<span class="keyword">typename</span> channel_type<View>::type,
<a name="l00069"></a>00069 <span class="keyword">typename</span> color_space_type<View>::type>::bit_depth));
<a name="l00070"></a>00070 BOOST_STATIC_CONSTANT(<span class="keywordtype">int</span>,color_type=
<a name="l00071"></a>00071 (detail::png_read_support_private<<span class="keyword">typename</span> channel_type<View>::type,
<a name="l00072"></a>00072 <span class="keyword">typename</span> color_space_type<View>::type>::color_type));
<a name="l00073"></a>00073 BOOST_STATIC_CONSTANT(<span class="keywordtype">bool</span>, value=is_supported);
<a name="l00074"></a>00074 };
<a name="l00075"></a>00075
<a name="l00081"></a>00081 <span class="keyword">template</span> <<span class="keyword">typename</span> View>
<a name="l00082"></a><a class="code" href="g_i_l_0174.html#gd38a3931f62a6341bd3d6f5a8a9575cc">00082</a> <span class="keyword">inline</span> <span class="keywordtype">void</span> <a class="code" href="g_i_l_0174.html#g26a89c06bf3915307483129fb655a205" title="Loads the image specified by the given png image file name into the given view.">png_read_view</a>(<span class="keyword">const</span> <span class="keywordtype">char</span>* filename,<span class="keyword">const</span> View& <a class="code" href="g_i_l_0135.html#g55e45a15dddfc0d870c2f7fb9739cb2e" title="Returns the non-constant-pixel view of any image. The returned view is any view.">view</a>) {
<a name="l00083"></a>00083 BOOST_STATIC_ASSERT(<a class="code" href="g_i_l_0613.html" title="Determines whether the given view type is supported for reading.">png_read_support<View>::is_supported</a>);
<a name="l00084"></a>00084 detail::png_reader m(filename);
<a name="l00085"></a>00085 m.apply(view);
<a name="l00086"></a>00086 }
<a name="l00087"></a>00087
<a name="l00090"></a>00090 <span class="keyword">template</span> <<span class="keyword">typename</span> View>
<a name="l00091"></a><a class="code" href="g_i_l_0174.html#g26a89c06bf3915307483129fb655a205">00091</a> <span class="keyword">inline</span> <span class="keywordtype">void</span> <a class="code" href="g_i_l_0174.html#g26a89c06bf3915307483129fb655a205" title="Loads the image specified by the given png image file name into the given view.">png_read_view</a>(<span class="keyword">const</span> std::string& filename,<span class="keyword">const</span> View& <a class="code" href="g_i_l_0135.html#g55e45a15dddfc0d870c2f7fb9739cb2e" title="Returns the non-constant-pixel view of any image. The returned view is any view.">view</a>) {
<a name="l00092"></a>00092 <a class="code" href="g_i_l_0174.html#g26a89c06bf3915307483129fb655a205" title="Loads the image specified by the given png image file name into the given view.">png_read_view</a>(filename.c_str(),view);
<a name="l00093"></a>00093 }
<a name="l00094"></a>00094
<a name="l00100"></a>00100 <span class="keyword">template</span> <<span class="keyword">typename</span> Image>
<a name="l00101"></a><a class="code" href="g_i_l_0174.html#gc295fb9e9c9cdaf7b570705a0e385ec6">00101</a> <span class="keyword">inline</span> <span class="keywordtype">void</span> <a class="code" href="g_i_l_0174.html#ge9a35f15e2544de801e23b3c481612a9" title="Allocates a new image whose dimensions are determined by the given png image file...">png_read_image</a>(<span class="keyword">const</span> <span class="keywordtype">char</span>* filename,Image& im) {
<a name="l00102"></a>00102 BOOST_STATIC_ASSERT(<a class="code" href="g_i_l_0613.html" title="Determines whether the given view type is supported for reading.">png_read_support<typename Image::view_t>::is_supported</a>);
<a name="l00103"></a>00103 detail::png_reader m(filename);
<a name="l00104"></a>00104 m.read_image(im);
<a name="l00105"></a>00105 }
<a name="l00106"></a>00106
<a name="l00109"></a>00109 <span class="keyword">template</span> <<span class="keyword">typename</span> Image>
<a name="l00110"></a><a class="code" href="g_i_l_0174.html#ge9a35f15e2544de801e23b3c481612a9">00110</a> <span class="keyword">inline</span> <span class="keywordtype">void</span> <a class="code" href="g_i_l_0174.html#ge9a35f15e2544de801e23b3c481612a9" title="Allocates a new image whose dimensions are determined by the given png image file...">png_read_image</a>(<span class="keyword">const</span> std::string& filename,Image& im) {
<a name="l00111"></a>00111 <a class="code" href="g_i_l_0174.html#ge9a35f15e2544de801e23b3c481612a9" title="Allocates a new image whose dimensions are determined by the given png image file...">png_read_image</a>(filename.c_str(),im);
<a name="l00112"></a>00112 }
<a name="l00113"></a>00113
<a name="l00117"></a>00117 <span class="keyword">template</span> <<span class="keyword">typename</span> View,<span class="keyword">typename</span> CC>
<a name="l00118"></a><a class="code" href="g_i_l_0174.html#g98fb4592762b73fbf1f982159677d069">00118</a> <span class="keyword">inline</span> <span class="keywordtype">void</span> <a class="code" href="g_i_l_0174.html#gf26951df731c0669918fed7f372b7aca" title="Loads the image specified by the given png image file name and color-converts it...">png_read_and_convert_view</a>(<span class="keyword">const</span> <span class="keywordtype">char</span>* filename,<span class="keyword">const</span> View& <a class="code" href="g_i_l_0135.html#g55e45a15dddfc0d870c2f7fb9739cb2e" title="Returns the non-constant-pixel view of any image. The returned view is any view.">view</a>,CC cc) {
<a name="l00119"></a>00119 detail::png_reader_color_convert<CC> m(filename,cc);
<a name="l00120"></a>00120 m.apply(view);
<a name="l00121"></a>00121 }
<a name="l00122"></a>00122
<a name="l00126"></a>00126 <span class="keyword">template</span> <<span class="keyword">typename</span> View>
<a name="l00127"></a><a class="code" href="g_i_l_0174.html#gdde60e9455374235470eb50affd92f1c">00127</a> <span class="keyword">inline</span> <span class="keywordtype">void</span> <a class="code" href="g_i_l_0174.html#gf26951df731c0669918fed7f372b7aca" title="Loads the image specified by the given png image file name and color-converts it...">png_read_and_convert_view</a>(<span class="keyword">const</span> <span class="keywordtype">char</span>* filename,<span class="keyword">const</span> View& <a class="code" href="g_i_l_0135.html#g55e45a15dddfc0d870c2f7fb9739cb2e" title="Returns the non-constant-pixel view of any image. The returned view is any view.">view</a>) {
<a name="l00128"></a>00128 detail::png_reader_color_convert<default_color_converter> m(filename,<a class="code" href="g_i_l_0452.html" title="class for color-converting one pixel to another">default_color_converter</a>());
<a name="l00129"></a>00129 m.apply(view);
<a name="l00130"></a>00130 }
<a name="l00131"></a>00131
<a name="l00134"></a>00134 <span class="keyword">template</span> <<span class="keyword">typename</span> View,<span class="keyword">typename</span> CC>
<a name="l00135"></a><a class="code" href="g_i_l_0174.html#g14f5371946862331ccde3e67651df78a">00135</a> <span class="keyword">inline</span> <span class="keywordtype">void</span> <a class="code" href="g_i_l_0174.html#gf26951df731c0669918fed7f372b7aca" title="Loads the image specified by the given png image file name and color-converts it...">png_read_and_convert_view</a>(<span class="keyword">const</span> std::string& filename,<span class="keyword">const</span> View& <a class="code" href="g_i_l_0135.html#g55e45a15dddfc0d870c2f7fb9739cb2e" title="Returns the non-constant-pixel view of any image. The returned view is any view.">view</a>,CC cc) {
<a name="l00136"></a>00136 <a class="code" href="g_i_l_0174.html#gf26951df731c0669918fed7f372b7aca" title="Loads the image specified by the given png image file name and color-converts it...">png_read_and_convert_view</a>(filename.c_str(),view,cc);
<a name="l00137"></a>00137 }
<a name="l00138"></a>00138
<a name="l00141"></a>00141 <span class="keyword">template</span> <<span class="keyword">typename</span> View>
<a name="l00142"></a><a class="code" href="g_i_l_0174.html#gf26951df731c0669918fed7f372b7aca">00142</a> <span class="keyword">inline</span> <span class="keywordtype">void</span> <a class="code" href="g_i_l_0174.html#gf26951df731c0669918fed7f372b7aca" title="Loads the image specified by the given png image file name and color-converts it...">png_read_and_convert_view</a>(<span class="keyword">const</span> std::string& filename,<span class="keyword">const</span> View& <a class="code" href="g_i_l_0135.html#g55e45a15dddfc0d870c2f7fb9739cb2e" title="Returns the non-constant-pixel view of any image. The returned view is any view.">view</a>) {
<a name="l00143"></a>00143 <a class="code" href="g_i_l_0174.html#gf26951df731c0669918fed7f372b7aca" title="Loads the image specified by the given png image file name and color-converts it...">png_read_and_convert_view</a>(filename.c_str(),view);
<a name="l00144"></a>00144 }
<a name="l00145"></a>00145
<a name="l00149"></a>00149 <span class="keyword">template</span> <<span class="keyword">typename</span> Image,<span class="keyword">typename</span> CC>
<a name="l00150"></a><a class="code" href="g_i_l_0174.html#g7b9a2c89929e9400a85814548f1d3002">00150</a> <span class="keyword">inline</span> <span class="keywordtype">void</span> <a class="code" href="g_i_l_0174.html#g086e5851f7d0e6067cdbe4037bd39b28" title="Allocates a new image whose dimensions are determined by the given png image file...">png_read_and_convert_image</a>(<span class="keyword">const</span> <span class="keywordtype">char</span>* filename,Image& im,CC cc) {
<a name="l00151"></a>00151 detail::png_reader_color_convert<CC> m(filename,cc);
<a name="l00152"></a>00152 m.read_image(im);
<a name="l00153"></a>00153 }
<a name="l00154"></a>00154
<a name="l00158"></a>00158 <span class="keyword">template</span> <<span class="keyword">typename</span> Image>
<a name="l00159"></a><a class="code" href="g_i_l_0174.html#gc5c5c8b057f342c96c410e03cea63b62">00159</a> <span class="keyword">inline</span> <span class="keywordtype">void</span> <a class="code" href="g_i_l_0174.html#g086e5851f7d0e6067cdbe4037bd39b28" title="Allocates a new image whose dimensions are determined by the given png image file...">png_read_and_convert_image</a>(<span class="keyword">const</span> <span class="keywordtype">char</span>* filename,Image& im) {
<a name="l00160"></a>00160 detail::png_reader_color_convert<default_color_converter> m(filename,<a class="code" href="g_i_l_0452.html" title="class for color-converting one pixel to another">default_color_converter</a>());
<a name="l00161"></a>00161 m.read_image(im);
<a name="l00162"></a>00162 }
<a name="l00163"></a>00163
<a name="l00166"></a>00166 <span class="keyword">template</span> <<span class="keyword">typename</span> Image,<span class="keyword">typename</span> CC>
<a name="l00167"></a><a class="code" href="g_i_l_0174.html#g215e558f6c06c6e91a20367f07cbb208">00167</a> <span class="keyword">inline</span> <span class="keywordtype">void</span> <a class="code" href="g_i_l_0174.html#g086e5851f7d0e6067cdbe4037bd39b28" title="Allocates a new image whose dimensions are determined by the given png image file...">png_read_and_convert_image</a>(<span class="keyword">const</span> std::string& filename,Image& im,CC cc) {
<a name="l00168"></a>00168 <a class="code" href="g_i_l_0174.html#g086e5851f7d0e6067cdbe4037bd39b28" title="Allocates a new image whose dimensions are determined by the given png image file...">png_read_and_convert_image</a>(filename.c_str(),im,cc);
<a name="l00169"></a>00169 }
<a name="l00170"></a>00170
<a name="l00173"></a>00173 <span class="keyword">template</span> <<span class="keyword">typename</span> Image>
<a name="l00174"></a><a class="code" href="g_i_l_0174.html#g086e5851f7d0e6067cdbe4037bd39b28">00174</a> <span class="keyword">inline</span> <span class="keywordtype">void</span> <a class="code" href="g_i_l_0174.html#g086e5851f7d0e6067cdbe4037bd39b28" title="Allocates a new image whose dimensions are determined by the given png image file...">png_read_and_convert_image</a>(<span class="keyword">const</span> std::string& filename,Image& im) {
<a name="l00175"></a>00175 <a class="code" href="g_i_l_0174.html#g086e5851f7d0e6067cdbe4037bd39b28" title="Allocates a new image whose dimensions are determined by the given png image file...">png_read_and_convert_image</a>(filename.c_str(),im);
<a name="l00176"></a>00176 }
<a name="l00177"></a>00177
<a name="l00180"></a>00180 <span class="keyword">template</span> <<span class="keyword">typename</span> View>
<a name="l00181"></a><a class="code" href="g_i_l_0615.html">00181</a> <span class="keyword">struct </span><a class="code" href="g_i_l_0615.html" title="Determines whether the given view type is supported for writing.">png_write_support</a> {
<a name="l00182"></a>00182 BOOST_STATIC_CONSTANT(<span class="keywordtype">bool</span>,is_supported=
<a name="l00183"></a>00183 (detail::png_write_support_private<<span class="keyword">typename</span> channel_type<View>::type,
<a name="l00184"></a>00184 <span class="keyword">typename</span> color_space_type<View>::type>::is_supported));
<a name="l00185"></a>00185 BOOST_STATIC_CONSTANT(<span class="keywordtype">int</span>,bit_depth=
<a name="l00186"></a>00186 (detail::png_write_support_private<<span class="keyword">typename</span> channel_type<View>::type,
<a name="l00187"></a>00187 <span class="keyword">typename</span> color_space_type<View>::type>::bit_depth));
<a name="l00188"></a>00188 BOOST_STATIC_CONSTANT(<span class="keywordtype">int</span>,color_type=
<a name="l00189"></a>00189 (detail::png_write_support_private<<span class="keyword">typename</span> channel_type<View>::type,
<a name="l00190"></a>00190 <span class="keyword">typename</span> color_space_type<View>::type>::color_type));
<a name="l00191"></a>00191 BOOST_STATIC_CONSTANT(<span class="keywordtype">bool</span>, value=is_supported);
<a name="l00192"></a>00192 };
<a name="l00193"></a>00193
<a name="l00198"></a>00198 <span class="keyword">template</span> <<span class="keyword">typename</span> View>
<a name="l00199"></a><a class="code" href="g_i_l_0174.html#ga3fb5aa5c76f3cf2ecbb35e9cc82a83a">00199</a> <span class="keyword">inline</span> <span class="keywordtype">void</span> <a class="code" href="g_i_l_0174.html#gb8c6c4c3b78627324ac5983e348008de" title="Saves the view to a png file specified by the given png image file name.">png_write_view</a>(<span class="keyword">const</span> <span class="keywordtype">char</span>* filename,<span class="keyword">const</span> View& <a class="code" href="g_i_l_0135.html#g55e45a15dddfc0d870c2f7fb9739cb2e" title="Returns the non-constant-pixel view of any image. The returned view is any view.">view</a>) {
<a name="l00200"></a>00200 BOOST_STATIC_ASSERT(<a class="code" href="g_i_l_0615.html" title="Determines whether the given view type is supported for writing.">png_write_support<View>::is_supported</a>);
<a name="l00201"></a>00201 detail::png_writer m(filename);
<a name="l00202"></a>00202 m.apply(view);
<a name="l00203"></a>00203 }
<a name="l00204"></a>00204
<a name="l00207"></a>00207 <span class="keyword">template</span> <<span class="keyword">typename</span> View>
<a name="l00208"></a><a class="code" href="g_i_l_0174.html#gb8c6c4c3b78627324ac5983e348008de">00208</a> <span class="keyword">inline</span> <span class="keywordtype">void</span> <a class="code" href="g_i_l_0174.html#gb8c6c4c3b78627324ac5983e348008de" title="Saves the view to a png file specified by the given png image file name.">png_write_view</a>(<span class="keyword">const</span> std::string& filename,<span class="keyword">const</span> View& <a class="code" href="g_i_l_0135.html#g55e45a15dddfc0d870c2f7fb9739cb2e" title="Returns the non-constant-pixel view of any image. The returned view is any view.">view</a>) {
<a name="l00209"></a>00209 <a class="code" href="g_i_l_0174.html#gb8c6c4c3b78627324ac5983e348008de" title="Saves the view to a png file specified by the given png image file name.">png_write_view</a>(filename.c_str(),view);
<a name="l00210"></a>00210 }
<a name="l00211"></a>00211
<a name="l00212"></a>00212 } } <span class="comment">// namespace boost::gil</span>
<a name="l00213"></a>00213
<a name="l00214"></a>00214 <span class="preprocessor">#endif</span>
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