1 <!-- Copyright 2008 Lubomir Bourdev and Hailin Jin
3 Distributed under the Boost Software License, Version 1.0.
4 (See accompanying file LICENSE_1_0.txt or copy at
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9 Copyright 2005-2007 Adobe Systems Incorporated
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40 <div class=
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41 <h1>jpeg_io_private.hpp
</h1><a href=
"g_i_l_0235.html">Go to the documentation of this file.
</a><div class=
"fragment"><pre class=
"fragment"><a name=
"l00001"></a>00001 <span class=
"comment">/*
</span>
42 <a name=
"l00002"></a>00002 <span class=
"comment"> Copyright
2005-
2007 Adobe Systems Incorporated
</span>
43 <a name=
"l00003"></a>00003 <span class=
"comment"> </span>
44 <a name=
"l00004"></a>00004 <span class=
"comment"> Use, modification and distribution are subject to the Boost Software License,
</span>
45 <a name=
"l00005"></a>00005 <span class=
"comment"> Version
1.0. (See accompanying file LICENSE_1_0.txt or copy at
</span>
46 <a name=
"l00006"></a>00006 <span class=
"comment"> http://www.boost.org/LICENSE_1_0.txt).
</span>
47 <a name=
"l00007"></a>00007 <span class=
"comment"></span>
48 <a name=
"l00008"></a>00008 <span class=
"comment"> See http://opensource.adobe.com/gil for most recent version including documentation.
</span>
49 <a name=
"l00009"></a>00009 <span class=
"comment">*/
</span>
50 <a name=
"l00010"></a>00010
51 <a name=
"l00011"></a>00011 <span class=
"comment">/*************************************************************************************************/
</span>
52 <a name=
"l00012"></a>00012
53 <a name=
"l00013"></a>00013 <span class=
"preprocessor">#ifndef GIL_JPEG_IO_PRIVATE_H
</span>
54 <a name=
"l00014"></a>00014 <span class=
"preprocessor"></span><span class=
"preprocessor">#define GIL_JPEG_IO_PRIVATE_H
</span>
55 <a name=
"l00015"></a>00015 <span class=
"preprocessor"></span>
56 <a name=
"l00021"></a>00021
57 <a name=
"l00022"></a>00022 <span class=
"preprocessor">#include
<stdio.h
></span>
58 <a name=
"l00023"></a>00023 <span class=
"preprocessor">#include
<boost/static_assert.hpp
></span>
59 <a name=
"l00024"></a>00024 <span class=
"preprocessor">#include
<vector
></span>
60 <a name=
"l00025"></a>00025 <span class=
"preprocessor">#include
"../../gil_all.hpp"</span>
61 <a name=
"l00026"></a>00026 <span class=
"preprocessor">#include
"<a class="code
" href="io__error_8hpp.html
" title="Handle input-output errors.
">io_error.hpp</a>"</span>
62 <a name=
"l00027"></a>00027 <span class=
"preprocessor">#include
<jpeglib.h
></span>
63 <a name=
"l00028"></a>00028
64 <a name=
"l00029"></a>00029 <span class=
"keyword">namespace
</span>boost {
<span class=
"keyword">namespace
</span>gil {
65 <a name=
"l00030"></a>00030
66 <a name=
"l00031"></a>00031 <span class=
"keyword">namespace
</span>detail {
67 <a name=
"l00032"></a>00032
68 <a name=
"l00033"></a>00033 <span class=
"comment">// lbourdev: What is the advantage of having channel and colorspace together? Are there cases where they are interrelated?
</span>
69 <a name=
"l00034"></a>00034
70 <a name=
"l00035"></a>00035 <span class=
"keyword">template
</span> <<span class=
"keyword">typename
</span> Channel,
<span class=
"keyword">typename
</span> ColorSpace
>
71 <a name=
"l00036"></a>00036 <span class=
"keyword">struct
</span>jpeg_read_support_private {
72 <a name=
"l00037"></a>00037 BOOST_STATIC_CONSTANT(
<span class=
"keywordtype">bool
</span>,is_supported=
<span class=
"keyword">false
</span>);
73 <a name=
"l00038"></a>00038 BOOST_STATIC_CONSTANT(J_COLOR_SPACE,color_type=JCS_UNKNOWN);
74 <a name=
"l00039"></a>00039 };
75 <a name=
"l00040"></a>00040 <span class=
"keyword">template
</span> <>
76 <a name=
"l00041"></a>00041 <span class=
"keyword">struct
</span>jpeg_read_support_private
<bits8,gray_t
> {
77 <a name=
"l00042"></a>00042 BOOST_STATIC_ASSERT(BITS_IN_JSAMPLE==
8);
78 <a name=
"l00043"></a>00043 BOOST_STATIC_CONSTANT(
<span class=
"keywordtype">bool
</span>,is_supported=
<span class=
"keyword">true
</span>);
79 <a name=
"l00044"></a>00044 BOOST_STATIC_CONSTANT(J_COLOR_SPACE,color_type=JCS_GRAYSCALE);
80 <a name=
"l00045"></a>00045 };
81 <a name=
"l00046"></a>00046 <span class=
"keyword">template
</span> <>
82 <a name=
"l00047"></a>00047 <span class=
"keyword">struct
</span>jpeg_read_support_private
<bits8,rgb_t
> {
83 <a name=
"l00048"></a>00048 BOOST_STATIC_ASSERT(BITS_IN_JSAMPLE==
8);
84 <a name=
"l00049"></a>00049 BOOST_STATIC_CONSTANT(
<span class=
"keywordtype">bool
</span>,is_supported=
<span class=
"keyword">true
</span>);
85 <a name=
"l00050"></a>00050 BOOST_STATIC_CONSTANT(J_COLOR_SPACE,color_type=JCS_RGB);
86 <a name=
"l00051"></a>00051 };
87 <a name=
"l00052"></a>00052 <span class=
"keyword">template
</span> <>
88 <a name=
"l00053"></a>00053 <span class=
"keyword">struct
</span>jpeg_read_support_private
<bits8,cmyk_t
> {
89 <a name=
"l00054"></a>00054 BOOST_STATIC_ASSERT(BITS_IN_JSAMPLE==
8);
90 <a name=
"l00055"></a>00055 BOOST_STATIC_CONSTANT(
<span class=
"keywordtype">bool
</span>,is_supported=
<span class=
"keyword">true
</span>);
91 <a name=
"l00056"></a>00056 BOOST_STATIC_CONSTANT(J_COLOR_SPACE,color_type=JCS_CMYK);
92 <a name=
"l00057"></a>00057 };
93 <a name=
"l00058"></a>00058 <span class=
"keyword">template
</span> <<span class=
"keyword">typename
</span> Channel,
<span class=
"keyword">typename
</span> ColorSpace
>
94 <a name=
"l00059"></a>00059 <span class=
"keyword">struct
</span>jpeg_write_support_private {
95 <a name=
"l00060"></a>00060 BOOST_STATIC_CONSTANT(
<span class=
"keywordtype">bool
</span>,is_supported=
<span class=
"keyword">false
</span>);
96 <a name=
"l00061"></a>00061 BOOST_STATIC_CONSTANT(J_COLOR_SPACE,color_type=JCS_UNKNOWN);
97 <a name=
"l00062"></a>00062 };
98 <a name=
"l00063"></a>00063 <span class=
"keyword">template
</span> <>
99 <a name=
"l00064"></a>00064 <span class=
"keyword">struct
</span>jpeg_write_support_private
<bits8,gray_t
> {
100 <a name=
"l00065"></a>00065 BOOST_STATIC_ASSERT(BITS_IN_JSAMPLE==
8);
101 <a name=
"l00066"></a>00066 BOOST_STATIC_CONSTANT(
<span class=
"keywordtype">bool
</span>,is_supported=
<span class=
"keyword">true
</span>);
102 <a name=
"l00067"></a>00067 BOOST_STATIC_CONSTANT(J_COLOR_SPACE,color_type=JCS_GRAYSCALE);
103 <a name=
"l00068"></a>00068 };
104 <a name=
"l00069"></a>00069 <span class=
"keyword">template
</span> <>
105 <a name=
"l00070"></a>00070 <span class=
"keyword">struct
</span>jpeg_write_support_private
<bits8,rgb_t
> {
106 <a name=
"l00071"></a>00071 BOOST_STATIC_ASSERT(BITS_IN_JSAMPLE==
8);
107 <a name=
"l00072"></a>00072 BOOST_STATIC_CONSTANT(
<span class=
"keywordtype">bool
</span>,is_supported=
<span class=
"keyword">true
</span>);
108 <a name=
"l00073"></a>00073 BOOST_STATIC_CONSTANT(J_COLOR_SPACE,color_type=JCS_RGB);
109 <a name=
"l00074"></a>00074 };
110 <a name=
"l00075"></a>00075 <span class=
"keyword">template
</span> <>
111 <a name=
"l00076"></a>00076 <span class=
"keyword">struct
</span>jpeg_write_support_private
<bits8,cmyk_t
> {
112 <a name=
"l00077"></a>00077 BOOST_STATIC_ASSERT(BITS_IN_JSAMPLE==
8);
113 <a name=
"l00078"></a>00078 BOOST_STATIC_CONSTANT(
<span class=
"keywordtype">bool
</span>,is_supported=
<span class=
"keyword">true
</span>);
114 <a name=
"l00079"></a>00079 BOOST_STATIC_CONSTANT(J_COLOR_SPACE,color_type=JCS_CMYK);
115 <a name=
"l00080"></a>00080 };
116 <a name=
"l00081"></a>00081
117 <a name=
"l00082"></a>00082
118 <a name=
"l00083"></a>00083 <span class=
"keyword">class
</span>jpeg_reader :
<span class=
"keyword">public
</span> file_mgr {
119 <a name=
"l00084"></a>00084 <span class=
"keyword">protected
</span>:
120 <a name=
"l00085"></a>00085 jpeg_decompress_struct _cinfo;
121 <a name=
"l00086"></a>00086 jpeg_error_mgr _jerr;
122 <a name=
"l00087"></a>00087
123 <a name=
"l00088"></a>00088 <span class=
"keywordtype">void
</span> init() {
124 <a name=
"l00089"></a>00089 _cinfo.err=jpeg_std_error(
&_jerr);
125 <a name=
"l00090"></a>00090 jpeg_create_decompress(
&_cinfo);
126 <a name=
"l00091"></a>00091 jpeg_stdio_src(
&_cinfo,_fp.get());
127 <a name=
"l00092"></a>00092 jpeg_read_header(
&_cinfo,TRUE);
128 <a name=
"l00093"></a>00093 }
129 <a name=
"l00094"></a>00094 <span class=
"keyword">public
</span>:
130 <a name=
"l00095"></a>00095 jpeg_reader(FILE* file) : file_mgr(file) { init(); }
131 <a name=
"l00096"></a>00096 jpeg_reader(
<span class=
"keyword">const
</span> <span class=
"keywordtype">char
</span>* filename) : file_mgr(filename,
<span class=
"stringliteral">"rb"</span>) { init(); }
132 <a name=
"l00097"></a>00097
133 <a name=
"l00098"></a>00098 ~jpeg_reader() { jpeg_destroy_decompress(
&_cinfo); }
134 <a name=
"l00099"></a>00099
135 <a name=
"l00100"></a>00100 <span class=
"keyword">template
</span> <<span class=
"keyword">typename
</span> View
>
136 <a name=
"l00101"></a>00101 <span class=
"keywordtype">void
</span> apply(
<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>) {
137 <a name=
"l00102"></a>00102 jpeg_start_decompress(
&_cinfo);
<span class=
"comment">// lbourdev: Can this return an error? You need to check and throw. Check all other library methods that can return an error state...
</span>
138 <a name=
"l00103"></a>00103 io_error_if(_cinfo.data_precision!=
8,
<span class=
"stringliteral">"jpeg_reader::apply(): this image file is not supported"</span>);
139 <a name=
"l00104"></a>00104 io_error_if(_cinfo.out_color_space!=jpeg_read_support_private
<<span class=
"keyword">typename
</span> channel_type
<View
>::type,
140 <a name=
"l00105"></a>00105 <span class=
"keyword">typename
</span> color_space_type
<View
>::type
>::color_type,
141 <a name=
"l00106"></a>00106 <span class=
"stringliteral">"jpeg_reader::apply(): input view type does not match the image file"</span>);
142 <a name=
"l00107"></a>00107 io_error_if(view.dimensions() != get_dimensions(),
<span class=
"stringliteral">"jpeg_reader::apply(): input view dimensions do not match the image file"</span>);
143 <a name=
"l00108"></a>00108 std::vector
<pixel
<bits8,layout
<typename color_space_type
<View
>::type
> > > row(view.width());
144 <a name=
"l00109"></a>00109 JSAMPLE* row_address=(JSAMPLE*)
&row.front();
145 <a name=
"l00110"></a>00110 <span class=
"keywordflow">for
</span>(
<span class=
"keywordtype">int
</span> y=
0;y
<view.height();++y) {
146 <a name=
"l00111"></a>00111 io_error_if(jpeg_read_scanlines(
&_cinfo,(JSAMPARRAY)
&row_address,
1)!=
1,
147 <a name=
"l00112"></a>00112 <span class=
"stringliteral">"jpeg_reader::apply(): fail to read JPEG file"</span>);
148 <a name=
"l00113"></a>00113 <a class=
"code" href=
"g_i_l_0214.html#g4e8a9e1bb08e76c93dc56a4626231ee1" title=
"Copy when both src and dst are planar pointers is copy for each channel.">std::copy
</a>(row.begin(),row.end(),view.row_begin(y));
149 <a name=
"l00114"></a>00114 }
150 <a name=
"l00115"></a>00115 jpeg_finish_decompress(
&_cinfo);
151 <a name=
"l00116"></a>00116 }
152 <a name=
"l00117"></a>00117
153 <a name=
"l00118"></a>00118 <span class=
"keyword">template
</span> <<span class=
"keyword">typename
</span> Image
>
154 <a name=
"l00119"></a>00119 <span class=
"keywordtype">void
</span> read_image(Image
& im) {
155 <a name=
"l00120"></a>00120 im.recreate(get_dimensions());
156 <a name=
"l00121"></a>00121 apply(
<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>(im));
157 <a name=
"l00122"></a>00122 }
158 <a name=
"l00123"></a>00123
159 <a name=
"l00124"></a>00124 point2
<std::ptrdiff_t
> get_dimensions()
<span class=
"keyword"> const
</span>{
160 <a name=
"l00125"></a>00125 <span class=
"keywordflow">return
</span> point2
<std::ptrdiff_t
>(_cinfo.image_width,_cinfo.image_height);
161 <a name=
"l00126"></a>00126 }
162 <a name=
"l00127"></a>00127 };
163 <a name=
"l00128"></a>00128
164 <a name=
"l00129"></a>00129 <span class=
"comment">// This code will be simplified...
</span>
165 <a name=
"l00130"></a>00130 <span class=
"keyword">template
</span> <<span class=
"keyword">typename
</span> CC
>
166 <a name=
"l00131"></a>00131 <span class=
"keyword">class
</span>jpeg_reader_color_convert :
<span class=
"keyword">public
</span> jpeg_reader {
167 <a name=
"l00132"></a>00132 <span class=
"keyword">private
</span>:
168 <a name=
"l00133"></a>00133 CC _cc;
169 <a name=
"l00134"></a>00134 <span class=
"keyword">public
</span>:
170 <a name=
"l00135"></a>00135 jpeg_reader_color_convert(FILE* file,CC cc_in) : jpeg_reader(file),_cc(cc_in) {}
171 <a name=
"l00136"></a>00136 jpeg_reader_color_convert(FILE* file) : jpeg_reader(file) {}
172 <a name=
"l00137"></a>00137 jpeg_reader_color_convert(
<span class=
"keyword">const
</span> <span class=
"keywordtype">char
</span>* filename,CC cc_in) : jpeg_reader(filename),_cc(cc_in) {}
173 <a name=
"l00138"></a>00138 jpeg_reader_color_convert(
<span class=
"keyword">const
</span> <span class=
"keywordtype">char
</span>* filename) : jpeg_reader(filename) {}
174 <a name=
"l00139"></a>00139 <span class=
"keyword">template
</span> <<span class=
"keyword">typename
</span> View
>
175 <a name=
"l00140"></a>00140 <span class=
"keywordtype">void
</span> apply(
<span class=
"keyword">const
</span> View
& view) {
176 <a name=
"l00141"></a>00141 jpeg_start_decompress(
&_cinfo);
<span class=
"comment">// lbourdev: Can this return an error? You need to check and throw. Check all other library methods that can return an error state...
</span>
177 <a name=
"l00142"></a>00142 io_error_if(_cinfo.data_precision!=
8,
<span class=
"stringliteral">"jpeg_reader_color_covert::apply(): this image file is not supported"</span>);
178 <a name=
"l00143"></a>00143 io_error_if(view.dimensions() != get_dimensions(),
<span class=
"stringliteral">"jpeg_reader_color_covert::apply(): input view dimensions don't match the image file"</span>);
179 <a name=
"l00144"></a>00144 <span class=
"keywordflow">switch
</span> (_cinfo.out_color_space) {
180 <a name=
"l00145"></a>00145 <span class=
"keywordflow">case
</span> JCS_GRAYSCALE: {
181 <a name=
"l00146"></a>00146 std::vector
<gray8_pixel_t
> row(view.width());
182 <a name=
"l00147"></a>00147 JSAMPLE* row_address=(JSAMPLE*)
&row.front();
183 <a name=
"l00148"></a>00148 <span class=
"keywordflow">for
</span>(
<span class=
"keywordtype">int
</span> y=
0;y
<view.height();++y) {
184 <a name=
"l00149"></a>00149 io_error_if(jpeg_read_scanlines(
&_cinfo,(JSAMPARRAY)
&row_address,
1)!=
1,
185 <a name=
"l00150"></a>00150 <span class=
"stringliteral">"jpeg_reader_color_covert::apply(): fail to read JPEG file"</span>);
186 <a name=
"l00151"></a>00151 std::transform(row.begin(),row.end(),view.row_begin(y),color_convert_deref_fn
<gray8_ref_t, typename View::value_type,CC
>(_cc));
187 <a name=
"l00152"></a>00152 }
188 <a name=
"l00153"></a>00153 <span class=
"keywordflow">break
</span>;
189 <a name=
"l00154"></a>00154 }
190 <a name=
"l00155"></a>00155 <span class=
"keywordflow">case
</span> JCS_RGB: {
191 <a name=
"l00156"></a>00156 std::vector
<rgb8_pixel_t
> row(view.width());
192 <a name=
"l00157"></a>00157 JSAMPLE* row_address=(JSAMPLE*)
&row.front();
193 <a name=
"l00158"></a>00158 <span class=
"keywordflow">for
</span>(
<span class=
"keywordtype">int
</span> y=
0;y
<view.height();++y) {
194 <a name=
"l00159"></a>00159 io_error_if(jpeg_read_scanlines(
&_cinfo,(JSAMPARRAY)
&row_address,
1)!=
1,
195 <a name=
"l00160"></a>00160 <span class=
"stringliteral">"jpeg_reader_color_covert::apply(): fail to read JPEG file"</span>);
196 <a name=
"l00161"></a>00161 std::transform(row.begin(),row.end(),view.row_begin(y),color_convert_deref_fn
<rgb8_ref_t, typename View::value_type,CC
>(_cc));
197 <a name=
"l00162"></a>00162 }
198 <a name=
"l00163"></a>00163 <span class=
"keywordflow">break
</span>;
199 <a name=
"l00164"></a>00164 }
200 <a name=
"l00165"></a>00165 <span class=
"keywordflow">case
</span> JCS_CMYK: {
201 <a name=
"l00166"></a>00166 std::vector
<cmyk8_pixel_t
> row(view.width());
202 <a name=
"l00167"></a>00167 JSAMPLE* row_address=(JSAMPLE*)
&row.front();
203 <a name=
"l00168"></a>00168 <span class=
"keywordflow">for
</span>(
<span class=
"keywordtype">int
</span> y=
0;y
<view.height();++y) {
204 <a name=
"l00169"></a>00169 io_error_if(jpeg_read_scanlines(
&_cinfo,(JSAMPARRAY)
&row_address,
1)!=
1,
205 <a name=
"l00170"></a>00170 <span class=
"stringliteral">"jpeg_reader_color_covert::apply(): fail to read JPEG file"</span>);
206 <a name=
"l00171"></a>00171 std::transform(row.begin(),row.end(),view.row_begin(y),color_convert_deref_fn
<cmyk8_ref_t, typename View::value_type,CC
>(_cc));
207 <a name=
"l00172"></a>00172 }
208 <a name=
"l00173"></a>00173 <span class=
"keywordflow">break
</span>;
209 <a name=
"l00174"></a>00174 }
210 <a name=
"l00175"></a>00175 <span class=
"keywordflow">default
</span>:
211 <a name=
"l00176"></a>00176 io_error(
<span class=
"stringliteral">"jpeg_reader_color_covert::apply(): unknown color type"</span>);
212 <a name=
"l00177"></a>00177 }
213 <a name=
"l00178"></a>00178 jpeg_finish_decompress(
&_cinfo);
214 <a name=
"l00179"></a>00179 }
215 <a name=
"l00180"></a>00180 <span class=
"keyword">template
</span> <<span class=
"keyword">typename
</span> Image
>
216 <a name=
"l00181"></a>00181 <span class=
"keywordtype">void
</span> read_image(Image
& im) {
217 <a name=
"l00182"></a>00182 im.recreate(get_dimensions());
218 <a name=
"l00183"></a>00183 apply(
<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>(im));
219 <a name=
"l00184"></a>00184 }
220 <a name=
"l00185"></a>00185 };
221 <a name=
"l00186"></a>00186
222 <a name=
"l00187"></a>00187 <span class=
"keyword">class
</span>jpeg_writer :
<span class=
"keyword">public
</span> file_mgr {
223 <a name=
"l00188"></a>00188 jpeg_compress_struct _cinfo;
224 <a name=
"l00189"></a>00189 jpeg_error_mgr _jerr;
225 <a name=
"l00190"></a>00190
226 <a name=
"l00191"></a>00191 <span class=
"keywordtype">void
</span> init() {
227 <a name=
"l00192"></a>00192 _cinfo.err=jpeg_std_error(
&_jerr);
228 <a name=
"l00193"></a>00193 jpeg_create_compress(
&_cinfo);
229 <a name=
"l00194"></a>00194 jpeg_stdio_dest(
&_cinfo,_fp.get());
230 <a name=
"l00195"></a>00195 }
231 <a name=
"l00196"></a>00196 <span class=
"keyword">public
</span>:
232 <a name=
"l00197"></a>00197 jpeg_writer(FILE* file) : file_mgr(file) { init(); }
233 <a name=
"l00198"></a>00198 jpeg_writer(
<span class=
"keyword">const
</span> <span class=
"keywordtype">char
</span>* filename) : file_mgr(filename,
<span class=
"stringliteral">"wb"</span>) { init(); }
234 <a name=
"l00199"></a>00199 ~jpeg_writer() { jpeg_destroy_compress(
&_cinfo); }
235 <a name=
"l00200"></a>00200
236 <a name=
"l00201"></a>00201 <span class=
"keyword">template
</span> <<span class=
"keyword">typename
</span> View
>
237 <a name=
"l00202"></a>00202 <span class=
"keywordtype">void
</span> apply(
<span class=
"keyword">const
</span> View
& view,
<span class=
"keywordtype">int
</span> quality=
100) {
238 <a name=
"l00203"></a>00203 _cinfo.image_width = (JDIMENSION)view.width();
239 <a name=
"l00204"></a>00204 _cinfo.image_height = (JDIMENSION)view.height();
240 <a name=
"l00205"></a>00205 _cinfo.input_components=num_channels
<View
>::value;
241 <a name=
"l00206"></a>00206 _cinfo.in_color_space = jpeg_write_support_private
<typename channel_type
<View
>::type,
242 <a name=
"l00207"></a>00207 <span class=
"keyword">typename
</span> color_space_type
<View
>::type
>::color_type;
243 <a name=
"l00208"></a>00208 jpeg_set_defaults(
&_cinfo);
244 <a name=
"l00209"></a>00209 jpeg_set_quality(
&_cinfo, quality, TRUE);
245 <a name=
"l00210"></a>00210 jpeg_start_compress(
&_cinfo, TRUE);
246 <a name=
"l00211"></a>00211 std::vector
<pixel
<bits8,layout
<typename color_space_type
<View
>::type
> > > row(view.width());
247 <a name=
"l00212"></a>00212 JSAMPLE* row_address=(JSAMPLE*)
&row.front();
248 <a name=
"l00213"></a>00213 <span class=
"keywordflow">for
</span> (
<span class=
"keywordtype">int
</span> y=
0;y
<view.height(); ++y) {
249 <a name=
"l00214"></a>00214 <a class=
"code" href=
"g_i_l_0214.html#g4e8a9e1bb08e76c93dc56a4626231ee1" title=
"Copy when both src and dst are planar pointers is copy for each channel.">std::copy
</a>(view.row_begin(y),view.row_end(y),row.begin());
250 <a name=
"l00215"></a>00215 io_error_if(jpeg_write_scanlines(
&_cinfo,(JSAMPARRAY)
&row_address,
1) !=
1,
251 <a name=
"l00216"></a>00216 <span class=
"stringliteral">"jpeg_writer::apply(): fail to write file"</span>);
252 <a name=
"l00217"></a>00217 }
253 <a name=
"l00218"></a>00218 jpeg_finish_compress(
&_cinfo);
254 <a name=
"l00219"></a>00219 }
255 <a name=
"l00220"></a>00220 };
256 <a name=
"l00221"></a>00221
257 <a name=
"l00222"></a>00222 }
<span class=
"comment">// namespace detail
</span>
258 <a name=
"l00223"></a>00223
259 <a name=
"l00224"></a>00224 } }
<span class=
"comment">// namespace boost::gil
</span>
260 <a name=
"l00225"></a>00225
261 <a name=
"l00226"></a>00226 <span class=
"preprocessor">#endif
</span>
263 <hr size=
"1"><address style=
"text-align: right;"><small>Generated on Sat May
2 13:
50:
14 2009 for Generic Image Library by
264 <a href=
"http://www.doxygen.org/index.html">
265 <img src=
"doxygen.png" alt=
"doxygen" align=
"middle" border=
"0"></a> 1.5.6 </small></address>