libs/gil/test/extension/io/png_read_test.cpp

   1 //
   2 // Copyright 2013 Christian Henning
   3 //
   4 // Distributed under the Boost Software License, Version 1.0
   5 // See accompanying file LICENSE_1_0.txt or copy at
   6 // http://www.boost.org/LICENSE_1_0.txt
   7 //
   8 //#define BOOST_TEST_MODULE png_read_test_module
   9 #define BOOST_GIL_IO_ADD_FS_PATH_SUPPORT
  10 #define BOOST_GIL_IO_ENABLE_GRAY_ALPHA
  11 #define BOOST_FILESYSTEM_VERSION 3
  12
  13 #include <boost/gil/extension/io/png.hpp>
  14
  15 #include <boost/test/unit_test.hpp>
  16
  17 #include <cstdint>
  18 #include <iostream>
  19
  20 #include "paths.hpp"
  21 #include "scanline_read_test.hpp"
  22 #include "unit_test_utility.hpp"
  23
  24 using namespace std;
  25 using namespace boost;
  26 using namespace gil;
  27 using namespace boost::gil::detail;
  28 namespace fs = boost::filesystem;
  29
  30 using tag_t = png_tag;
  31
  32 BOOST_AUTO_TEST_SUITE( gil_io_png_tests )
  33
  34 using gray_alpha8_pixel_t = pixel<uint8_t, gray_alpha_layout_t>;
  35 using gray_alpha8_image_t= image<gray_alpha8_pixel_t, false>;
  36
  37 using gray_alpha16_pixel_t = pixel<uint16_t, gray_alpha_layout_t>;
  38 using gray_alpha16_image_t = image<gray_alpha16_pixel_t, false>;
  39
  40 template< typename Image >
  41 void test_file( string filename )
  42 {
  43     Image src, dst;
  44
  45     image_read_settings< png_tag > settings;
  46     settings._read_file_gamma        = true;
  47     settings._read_transparency_data = true;
  48
  49
  50     using backend_t = get_reader_backend<std::string const, tag_t>::type;
  51
  52     backend_t backend = read_image_info( png_in + filename
  53                                         , settings
  54                                         );
  55
  56     read_image( png_in + filename
  57               , src
  58               , settings
  59               );
  60
  61
  62 #ifdef BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
  63     image_write_info< png_tag > write_info;
  64     write_info._file_gamma = backend._info._file_gamma;
  65
  66     write_view( png_out + filename
  67               , view( src )
  68               , write_info
  69               );
  70
  71     read_image( png_out + filename
  72               , dst
  73               , settings
  74               );
  75
  76
  77     BOOST_CHECK( equal_pixels( const_view( src )
  78                              , const_view( dst )
  79                              )
  80                );
  81 #endif // BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
  82 }
  83
  84 template< typename Image >
  85 void test_png_scanline_reader( string filename )
  86 {
  87     test_scanline_reader<Image, png_tag>( string( png_in + filename ).c_str() );
  88 }
  89
  90 BOOST_AUTO_TEST_CASE( read_header_test )
  91 {
  92     using backend_t = get_reader_backend<std::string const, tag_t>::type;
  93
  94     backend_t backend = read_image_info( png_filename
  95                                        , tag_t()
  96                                        );
  97
  98     BOOST_CHECK_EQUAL( backend._info._width , 1000u );
  99     BOOST_CHECK_EQUAL( backend._info._height,  600u );
 100
 101     BOOST_CHECK_EQUAL( backend._info._num_channels, 4                   );
 102     BOOST_CHECK_EQUAL( backend._info._bit_depth   , 8                   );
 103     BOOST_CHECK_EQUAL( backend._info._color_type  , PNG_COLOR_TYPE_RGBA );
 104
 105     BOOST_CHECK_EQUAL( backend._info._interlace_method  , PNG_INTERLACE_NONE        );
 106     BOOST_CHECK_EQUAL( backend._info._compression_method, PNG_COMPRESSION_TYPE_BASE );
 107     BOOST_CHECK_EQUAL( backend._info._filter_method     , PNG_FILTER_TYPE_BASE      );
 108
 109
 110     BOOST_CHECK_EQUAL( backend._info._file_gamma, 1 );
 111 }
 112
 113 #ifdef BOOST_GIL_IO_TEST_ALLOW_READING_IMAGES
 114
 115 BOOST_AUTO_TEST_CASE( read_pixel_per_meter )
 116 {
 117     image_read_settings< png_tag > settings;
 118     settings.set_read_members_true();
 119
 120     using backend_t = get_reader_backend<std::string const, tag_t>::type;
 121
 122     backend_t backend = read_image_info( png_base_in + "EddDawson/36dpi.png"
 123                                       , settings
 124                                       );
 125
 126     BOOST_CHECK_EQUAL( backend._info._pixels_per_meter, png_uint_32( 1417 ));
 127 }
 128
 129 BOOST_AUTO_TEST_CASE(read_with_trns_chunk_color_type_0)
 130 {
 131     // PNG 1.2: For color type 0 (grayscale), the tRNS chunk contains a single gray level value,
 132     // stored in the format:
 133     //
 134     // Gray:  2 bytes, range 0 .. (2^bitdepth)-1
 135     {
 136         auto const png_path = png_in + "tbbn0g04.png";
 137         image_read_settings<png_tag> settings;
 138         settings.set_read_members_true();
 139         auto backend = read_image_info(png_path, settings);
 140         BOOST_CHECK_EQUAL(backend._info._width, 32u);
 141         BOOST_CHECK_EQUAL(backend._info._height, 32u);
 142         BOOST_CHECK_EQUAL(backend._info._bit_depth, 4);
 143         BOOST_CHECK_EQUAL(backend._info._num_channels, 1u);
 144         BOOST_CHECK_EQUAL(backend._info._color_type, PNG_COLOR_TYPE_GRAY);
 145
 146         gray_alpha8_image_t img;
 147         read_image(png_path, img, settings);
 148         BOOST_CHECK_EQUAL(backend._info._width, 32u);
 149         BOOST_CHECK_EQUAL(backend._info._height, 32u);
 150         BOOST_TEST(const_view(img).front() == gray_alpha8c_pixel_t(255, 0));
 151         BOOST_TEST(const_view(img)[78] == gray_alpha8c_pixel_t(221, 255));
 152         BOOST_TEST(const_view(img)[79] == gray_alpha8c_pixel_t(204, 255));
 153         BOOST_TEST(const_view(img)[975] == gray_alpha8c_pixel_t(238, 255));
 154         BOOST_TEST(const_view(img)[976] == gray_alpha8c_pixel_t(221, 255));
 155         BOOST_TEST(const_view(img).back() == gray_alpha8c_pixel_t(255, 0));
 156     }
 157     {
 158         auto const png_path = png_in + "tbwn0g16.png";
 159         image_read_settings<png_tag> settings;
 160         settings.set_read_members_true();
 161         auto backend = read_image_info(png_path, settings);
 162         BOOST_CHECK_EQUAL(backend._info._width, 32u);
 163         BOOST_CHECK_EQUAL(backend._info._height, 32u);
 164         BOOST_CHECK_EQUAL(backend._info._bit_depth, 16);
 165         BOOST_CHECK_EQUAL(backend._info._num_channels, 1u);
 166         BOOST_CHECK_EQUAL(backend._info._color_type, PNG_COLOR_TYPE_GRAY);
 167
 168         gray_alpha16_image_t img;
 169         read_image(png_path, img, settings);
 170         BOOST_CHECK_EQUAL(backend._info._width, 32u);
 171         BOOST_CHECK_EQUAL(backend._info._height, 32u);
 172         BOOST_TEST(const_view(img).front() == gray_alpha16c_pixel_t(65535, 0));
 173         BOOST_TEST(const_view(img)[78] == gray_alpha16c_pixel_t(58339, 65535));
 174         BOOST_TEST(const_view(img)[79] == gray_alpha16c_pixel_t(51657, 65535));
 175         BOOST_TEST(const_view(img)[975] == gray_alpha16c_pixel_t(62965, 65535));
 176         BOOST_TEST(const_view(img)[976] == gray_alpha16c_pixel_t(58339, 65535));
 177         BOOST_TEST(const_view(img).back() == gray_alpha16c_pixel_t(65535, 0));
 178     }
 179 }
 180
 181 BOOST_AUTO_TEST_CASE(read_with_trns_chunk_color_type_2)
 182 {
 183     // PNG 1.2: For color type 2 (truecolor), the tRNS chunk contains a single RGB color value,
 184     // stored in the format:
 185     //
 186     // Red:   2 bytes, range 0 .. (2^bitdepth)-1
 187     // Green: 2 bytes, range 0 .. (2^bitdepth)-1
 188     // Blue:  2 bytes, range 0 .. (2^bitdepth)-1
 189     {
 190         auto const png_path = png_in + "tbbn2c16.png";
 191         image_read_settings<png_tag> settings;
 192         settings.set_read_members_true();
 193         auto backend = read_image_info(png_path, settings);
 194         BOOST_CHECK_EQUAL(backend._info._width, 32u);
 195         BOOST_CHECK_EQUAL(backend._info._height, 32u);
 196         BOOST_CHECK_EQUAL(backend._info._bit_depth, 16);
 197         BOOST_CHECK_EQUAL(backend._info._num_channels, 3u);
 198         BOOST_CHECK_EQUAL(backend._info._color_type, PNG_COLOR_TYPE_RGB);
 199
 200         rgba16_image_t img;
 201         read_image(png_path, img, settings);
 202         BOOST_CHECK_EQUAL(backend._info._width, 32u);
 203         BOOST_CHECK_EQUAL(backend._info._height, 32u);
 204         BOOST_TEST(const_view(img).front() == rgba16c_pixel_t(65535, 65535, 65535, 0));
 205         BOOST_TEST(const_view(img)[78] == rgba16c_pixel_t(58339, 58339, 58339, 65535));
 206         BOOST_TEST(const_view(img)[79] == rgba16c_pixel_t(51657, 51657, 51657, 65535));
 207         BOOST_TEST(const_view(img)[975] == rgba16c_pixel_t(62965, 62965, 62965, 65535));
 208         BOOST_TEST(const_view(img)[976] == rgba16c_pixel_t(58339, 58339, 58339, 65535));
 209         BOOST_TEST(const_view(img).back() == rgba16c_pixel_t(65535, 65535, 65535, 0));
 210     }
 211     {
 212         auto const png_path = png_in + "tbgn2c16.png";
 213         image_read_settings<png_tag> settings;
 214         settings.set_read_members_true();
 215         auto backend = read_image_info(png_path, settings);
 216         BOOST_CHECK_EQUAL(backend._info._width, 32u);
 217         BOOST_CHECK_EQUAL(backend._info._height, 32u);
 218         BOOST_CHECK_EQUAL(backend._info._bit_depth, 16);
 219         BOOST_CHECK_EQUAL(backend._info._num_channels, 3u);
 220         BOOST_CHECK_EQUAL(backend._info._color_type, PNG_COLOR_TYPE_RGB);
 221
 222         rgba16_image_t img;
 223         read_image(png_path, img, settings);
 224         BOOST_CHECK_EQUAL(backend._info._width, 32u);
 225         BOOST_CHECK_EQUAL(backend._info._height, 32u);
 226         BOOST_TEST(const_view(img).front() == rgba16c_pixel_t(65535, 65535, 65535, 0));
 227         BOOST_TEST(const_view(img)[78] == rgba16c_pixel_t(58339, 58339, 58339, 65535));
 228         BOOST_TEST(const_view(img)[79] == rgba16c_pixel_t(51657, 51657, 51657, 65535));
 229         BOOST_TEST(const_view(img)[975] == rgba16c_pixel_t(62965, 62965, 62965, 65535));
 230         BOOST_TEST(const_view(img)[976] == rgba16c_pixel_t(58339, 58339, 58339, 65535));
 231         BOOST_TEST(const_view(img).back() == rgba16c_pixel_t(65535, 65535, 65535, 0));
 232     }
 233     {
 234         auto const png_path = png_in + "tbrn2c08.png";
 235         image_read_settings<png_tag> settings;
 236         settings.set_read_members_true();
 237         auto backend = read_image_info(png_path, settings);
 238         BOOST_CHECK_EQUAL(backend._info._width, 32u);
 239         BOOST_CHECK_EQUAL(backend._info._height, 32u);
 240         BOOST_CHECK_EQUAL(backend._info._bit_depth, 8);
 241         BOOST_CHECK_EQUAL(backend._info._num_channels, 3u);
 242         BOOST_CHECK_EQUAL(backend._info._color_type, PNG_COLOR_TYPE_RGB);
 243
 244         rgba8_image_t img;
 245         read_image(png_path, img, settings);
 246         BOOST_CHECK_EQUAL(backend._info._width, 32u);
 247         BOOST_CHECK_EQUAL(backend._info._height, 32u);
 248         BOOST_TEST(const_view(img).front() == rgba8c_pixel_t(255, 255, 255, 0));
 249         BOOST_TEST(const_view(img)[78] == rgba8c_pixel_t(227, 227, 227, 255));
 250         BOOST_TEST(const_view(img)[79] == rgba8c_pixel_t(201, 201, 201, 255));
 251         BOOST_TEST(const_view(img)[975] == rgba8c_pixel_t(245, 245, 245, 255));
 252         BOOST_TEST(const_view(img)[976] == rgba8c_pixel_t(227, 227, 227, 255));
 253         BOOST_TEST(const_view(img).back() == rgba8c_pixel_t(255, 255, 255, 0));
 254     }
 255 }
 256
 257 BOOST_AUTO_TEST_CASE(read_with_trns_chunk_color_type_3)
 258 {
 259     // PNG 1.2: For color type 3 (indexed color), the tRNS chunk contains a series of one-byte
 260     // alpha values, corresponding to entries in the PLTE chunk:
 261     //
 262     // Alpha for palette index 0:  1 byte
 263     // Alpha for palette index 1:  1 byte
 264     // ...etc...
 265     {
 266         auto const png_path = png_in + "tbbn3p08.png";
 267         image_read_settings<png_tag> settings;
 268         settings.set_read_members_true();
 269         auto backend = read_image_info(png_path, settings);
 270         BOOST_CHECK_EQUAL(backend._info._width, 32u);
 271         BOOST_CHECK_EQUAL(backend._info._height, 32u);
 272         BOOST_CHECK_EQUAL(backend._info._bit_depth, 8);
 273         BOOST_CHECK_EQUAL(backend._info._num_channels, 1u);
 274         BOOST_CHECK_EQUAL(backend._info._color_type, PNG_COLOR_TYPE_PALETTE);
 275
 276         rgba8_image_t img;
 277         read_image(png_path, img, settings);
 278         BOOST_CHECK_EQUAL(backend._info._width, 32u);
 279         BOOST_CHECK_EQUAL(backend._info._height, 32u);
 280         BOOST_TEST(const_view(img).front() == rgba8c_pixel_t(255, 255, 255, 0));
 281         BOOST_TEST(const_view(img)[78] == rgba8c_pixel_t(227, 227, 227, 255));
 282         BOOST_TEST(const_view(img)[79] == rgba8c_pixel_t(201, 201, 201, 255));
 283         BOOST_TEST(const_view(img)[975] == rgba8c_pixel_t(246, 246, 246, 255));
 284         BOOST_TEST(const_view(img)[976] == rgba8c_pixel_t(227, 227, 227, 255));
 285         BOOST_TEST(const_view(img).back() == rgba8c_pixel_t(255, 255, 255, 0));
 286     }
 287     {
 288         auto const png_path = png_in + "tbgn3p08.png";
 289         image_read_settings<png_tag> settings;
 290         settings.set_read_members_true();
 291         auto backend = read_image_info(png_path, settings);
 292         BOOST_CHECK_EQUAL(backend._info._width, 32u);
 293         BOOST_CHECK_EQUAL(backend._info._height, 32u);
 294         BOOST_CHECK_EQUAL(backend._info._bit_depth, 8);
 295         BOOST_CHECK_EQUAL(backend._info._num_channels, 1u);
 296         BOOST_CHECK_EQUAL(backend._info._color_type, PNG_COLOR_TYPE_PALETTE);
 297
 298         rgba8_image_t img;
 299         read_image(png_path, img, settings);
 300         BOOST_CHECK_EQUAL(backend._info._width, 32u);
 301         BOOST_CHECK_EQUAL(backend._info._height, 32u);
 302         BOOST_TEST(const_view(img).front() == rgba8c_pixel_t(255, 255, 255, 0));
 303         BOOST_TEST(const_view(img)[78] == rgba8c_pixel_t(227, 227, 227, 255));
 304         BOOST_TEST(const_view(img)[79] == rgba8c_pixel_t(201, 201, 201, 255));
 305         BOOST_TEST(const_view(img)[975] == rgba8c_pixel_t(246, 246, 246, 255));
 306         BOOST_TEST(const_view(img)[976] == rgba8c_pixel_t(227, 227, 227, 255));
 307         BOOST_TEST(const_view(img).back() == rgba8c_pixel_t(255, 255, 255, 0));
 308     }
 309     {
 310         auto const png_path = png_in + "tp1n3p08.png";
 311         image_read_settings<png_tag> settings;
 312         settings.set_read_members_true();
 313         auto backend = read_image_info(png_path, settings);
 314         BOOST_CHECK_EQUAL(backend._info._width, 32u);
 315         BOOST_CHECK_EQUAL(backend._info._height, 32u);
 316         BOOST_CHECK_EQUAL(backend._info._bit_depth, 8);
 317         BOOST_CHECK_EQUAL(backend._info._num_channels, 1u);
 318         BOOST_CHECK_EQUAL(backend._info._color_type, PNG_COLOR_TYPE_PALETTE);
 319
 320         rgba8_image_t img;
 321         read_image(png_path, img, settings);
 322         BOOST_CHECK_EQUAL(backend._info._width, 32u);
 323         BOOST_CHECK_EQUAL(backend._info._height, 32u);
 324         BOOST_TEST(const_view(img).front() == rgba8c_pixel_t(255, 255, 255, 0));
 325         BOOST_TEST(const_view(img)[78] == rgba8c_pixel_t(227, 227, 227, 255));
 326         BOOST_TEST(const_view(img)[79] == rgba8c_pixel_t(201, 201, 201, 255));
 327         BOOST_TEST(const_view(img)[975] == rgba8c_pixel_t(246, 246, 246, 255));
 328         BOOST_TEST(const_view(img)[976] == rgba8c_pixel_t(227, 227, 227, 255));
 329         BOOST_TEST(const_view(img).back() == rgba8c_pixel_t(255, 255, 255, 0));
 330     }
 331     {
 332         auto const png_path = png_in + "tm3n3p02.png";
 333         image_read_settings<png_tag> settings;
 334         settings.set_read_members_true();
 335         auto backend = read_image_info(png_path, settings);
 336         BOOST_CHECK_EQUAL(backend._info._width, 32u);
 337         BOOST_CHECK_EQUAL(backend._info._height, 32u);
 338         BOOST_CHECK_EQUAL(backend._info._bit_depth, 2);
 339         BOOST_CHECK_EQUAL(backend._info._num_channels, 1u);
 340         BOOST_CHECK_EQUAL(backend._info._color_type, PNG_COLOR_TYPE_PALETTE);
 341
 342         rgba8_image_t img;
 343         read_image(png_path, img, settings);
 344         BOOST_CHECK_EQUAL(backend._info._width, 32u);
 345         BOOST_CHECK_EQUAL(backend._info._height, 32u);
 346         BOOST_TEST(const_view(img).front() == rgba8c_pixel_t(0, 0, 255, 0));
 347         BOOST_TEST(const_view(img)[16] == rgba8c_pixel_t(0, 0, 255, 85));
 348         BOOST_TEST(const_view(img)[511] == rgba8c_pixel_t(0, 0, 255, 85));
 349         BOOST_TEST(const_view(img)[1007] == rgba8c_pixel_t(0, 0, 255, 170));
 350         BOOST_TEST(const_view(img).back() == rgba8c_pixel_t(0, 0, 255, 255));
 351     }
 352 }
 353
 354 #endif // BOOST_GIL_IO_TEST_ALLOW_READING_IMAGES
 355
 356 #ifdef BOOST_GIL_IO_USE_PNG_TEST_SUITE_IMAGES
 357
 358 BOOST_AUTO_TEST_CASE( BASIc_format_test )
 359 {
 360     // Basic format test files (non-interlaced)
 361
 362     // BASN0g01    -   black & white
 363     test_file< gray1_image_t >( "BASN0G01.PNG" );
 364     test_png_scanline_reader< gray1_image_t >( "BASN0G01.PNG" );
 365
 366     // BASN0g02    -   2 bit (4 level) grayscale
 367     test_file< gray2_image_t >( "BASN0G02.PNG" );
 368     test_png_scanline_reader< gray2_image_t >( "BASN0G02.PNG" );
 369
 370     // BASN0g04    -   4 bit (16 level) grayscale
 371     test_file< gray4_image_t >( "BASN0G04.PNG" );
 372     test_png_scanline_reader< gray4_image_t >( "BASN0G04.PNG" );
 373
 374     // BASN0g08    -   8 bit (256 level) grayscale
 375     test_file< gray8_image_t >( "BASN0G08.PNG" );
 376     test_png_scanline_reader< gray8_image_t >( "BASN0G08.PNG" );
 377
 378     // BASN0g16    -   16 bit (64k level) grayscale
 379     test_file< gray16_image_t >( "BASN0G16.PNG" );
 380     test_png_scanline_reader< gray16_image_t >( "BASN0G16.PNG" );
 381
 382     // BASN2c08    -   3x8 bits rgb color
 383     test_file< rgb8_image_t >( "BASN2C08.PNG" );
 384     test_png_scanline_reader< rgb8_image_t >( "BASN2C08.PNG" );
 385
 386     // BASN2c16    -   3x16 bits rgb color
 387     test_file< rgb16_image_t >( "BASN2C16.PNG" );
 388     test_png_scanline_reader< rgb16_image_t >( "BASN2C16.PNG" );
 389
 390     // BASN3p01    -   1 bit (2 color) paletted
 391     test_file< rgb8_image_t >( "BASN3P01.PNG" );
 392     test_png_scanline_reader< rgb8_image_t >( "BASN3P01.PNG" );
 393
 394     // BASN3p02    -   2 bit (4 color) paletted
 395     test_file< rgb8_image_t >( "BASN3P02.PNG" );
 396     test_png_scanline_reader< rgb8_image_t >( "BASN3P02.PNG" );
 397
 398     // BASN3p04    -   4 bit (16 color) paletted
 399     test_file< rgb8_image_t >( "BASN3P04.PNG" );
 400     test_png_scanline_reader< rgb8_image_t >( "BASN3P04.PNG" );
 401
 402     // BASN3p08    -   8 bit (256 color) paletted
 403     test_file< rgb8_image_t >( "BASN3P08.PNG" );
 404     test_png_scanline_reader< rgb8_image_t >( "BASN3P08.PNG" );
 405
 406     // BASN4a08    -   8 bit grayscale + 8 bit alpha-channel
 407     test_file< gray_alpha8_image_t >( "BASN4A08.PNG" );
 408     test_png_scanline_reader< gray_alpha8_image_t >( "BASN4A08.PNG" );
 409
 410     // BASN4a16    -   16 bit grayscale + 16 bit alpha-channel
 411     test_file< gray_alpha16_image_t >( "BASN4A16.PNG" );
 412     test_png_scanline_reader< gray_alpha16_image_t >( "BASN4A16.PNG" );
 413
 414     // BASN6a08    -   3x8 bits rgb color + 8 bit alpha-channel
 415     test_file< rgba8_image_t >( "BASN6A08.PNG" );
 416     test_png_scanline_reader< rgba8_image_t >( "BASN6A08.PNG" );
 417
 418     // BASN6a16    -   3x16 bits rgb color + 16 bit alpha-channel
 419     test_file< rgba16_image_t >( "BASN6A16.PNG" );
 420     test_png_scanline_reader< rgba16_image_t >( "BASN6A16.PNG" );
 421 }
 422
 423 BOOST_AUTO_TEST_CASE( BASIc_format_interlaced_test )
 424 {
 425     // Basic format test files (Adam-7 interlaced)
 426
 427     // BASI0g01    -   black & white
 428     test_file< gray1_image_t >( "BASI0G01.PNG" );
 429
 430     // BASI0g02    -   2 bit (4 level) grayscale
 431     test_file< gray2_image_t >( "BASI0G02.PNG" );
 432
 433     // BASI0g04    -   4 bit (16 level) grayscale
 434     test_file< gray4_image_t >( "BASI0G04.PNG" );
 435
 436     // BASI0g08    -   8 bit (256 level) grayscale
 437     test_file< gray8_image_t >( "BASI0G08.PNG" );
 438
 439     // BASI0g16    -   16 bit (64k level) grayscale
 440     test_file< gray16_image_t >( "BASI0G16.PNG" );
 441
 442     // BASI2c08    -   3x8 bits rgb color
 443     test_file< rgb8_image_t >( "BASI2C08.PNG" );
 444
 445     // BASI2c16    -   3x16 bits rgb color
 446     test_file< rgb16_image_t >( "BASI2C16.PNG" );
 447
 448     // BASI3p01    -   1 bit (2 color) paletted
 449     test_file< rgb8_image_t >( "BASI3P01.PNG" );
 450
 451     // BASI3p02    -   2 bit (4 color) paletted
 452     test_file< rgb8_image_t >( "BASI3P02.PNG" );
 453
 454     // BASI3p04    -   4 bit (16 color) paletted
 455     test_file< rgb8_image_t >( "BASI3P04.PNG" );
 456
 457     // BASI3p08    -   8 bit (256 color) paletted
 458     test_file< rgb8_image_t >( "BASI3P08.PNG" );
 459
 460     // BASI4a08    -   8 bit grayscale + 8 bit alpha-channel
 461     test_file< gray_alpha8_image_t >( "BASI4A08.PNG" );
 462
 463     // BASI4a16    -   16 bit grayscale + 16 bit alpha-channel
 464     test_file< gray_alpha16_image_t >( "BASI4A16.PNG" );
 465
 466     // BASI6a08    -   3x8 bits rgb color + 8 bit alpha-channel
 467     test_file< rgba8_image_t >( "BASI6A08.PNG" );
 468
 469     // BASI6a16    -   3x16 bits rgb color + 16 bit alpha-channel
 470     test_file< rgba16_image_t >( "BASI6A16.PNG" );
 471 }
 472
 473 BOOST_AUTO_TEST_CASE( odd_sizes_test )
 474 {
 475     // S01I3P01 - 1x1 paletted file, interlaced
 476     test_file< rgb8_image_t >( "S01I3P01.PNG" );
 477
 478     // S01N3P01 - 1x1 paletted file, no interlacing
 479     test_file< rgb8_image_t >( "S01N3P01.PNG" );
 480     test_png_scanline_reader< rgb8_image_t >( "S01N3P01.PNG" );
 481
 482     // S02I3P01 - 2x2 paletted file, interlaced
 483     test_file< rgb8_image_t >( "S02I3P01.PNG" );
 484
 485     // S02N3P01 - 2x2 paletted file, no interlacing
 486     test_file< rgb8_image_t >( "S02N3P01.PNG" );
 487     test_png_scanline_reader< rgb8_image_t >( "S02N3P01.PNG" );
 488
 489     // S03I3P01 - 3x3 paletted file, interlaced
 490     test_file< rgb8_image_t >( "S03I3P01.PNG" );
 491
 492     // S03N3P01 - 3x3 paletted file, no interlacing
 493     test_file< rgb8_image_t >( "S03N3P01.PNG" );
 494     test_png_scanline_reader< rgb8_image_t >( "S03N3P01.PNG" );
 495
 496     // S04I3P01 - 4x4 paletted file, interlaced
 497     test_file< rgb8_image_t >( "S04I3P01.PNG" );
 498
 499     // S04N3P01 - 4x4 paletted file, no interlacing
 500     test_file< rgb8_image_t >( "S04N3P01.PNG" );
 501     test_png_scanline_reader< rgb8_image_t >( "S04N3P01.PNG" );
 502
 503     // S05I3P02 - 5x5 paletted file, interlaced
 504     test_file< rgb8_image_t >( "S05I3P02.PNG" );
 505
 506     // S05N3P02 - 5x5 paletted file, no interlacing
 507     test_file< rgb8_image_t >( "S05N3P02.PNG" );
 508     test_png_scanline_reader< rgb8_image_t >( "S05N3P02.PNG" );
 509
 510     // S06I3P02 - 6x6 paletted file, interlaced
 511     test_file< rgb8_image_t >( "S06I3P02.PNG" );
 512
 513     // S06N3P02 - 6x6 paletted file, no interlacing
 514     test_file< rgb8_image_t >( "S06N3P02.PNG" );
 515     test_png_scanline_reader< rgb8_image_t >( "S06N3P02.PNG" );
 516
 517     // S07I3P02 - 7x7 paletted file, interlaced
 518     test_file< rgb8_image_t >( "S07I3P02.PNG" );
 519
 520     // S07N3P02 - 7x7 paletted file, no interlacing
 521     test_file< rgb8_image_t >( "S07N3P02.PNG" );
 522     test_png_scanline_reader< rgb8_image_t >( "S07N3P02.PNG" );
 523
 524     // S08I3P02 - 8x8 paletted file, interlaced
 525     test_file< rgb8_image_t >( "S08I3P02.PNG" );
 526
 527     // S08N3P02 - 8x8 paletted file, no interlacing
 528     test_file< rgb8_image_t >( "S08N3P02.PNG" );
 529     test_png_scanline_reader< rgb8_image_t >( "S08N3P02.PNG" );
 530
 531     // S09I3P02 - 9x9 paletted file, interlaced
 532     test_file< rgb8_image_t >( "S09I3P02.PNG" );
 533
 534     // S09N3P02 - 9x9 paletted file, no interlacing
 535     test_file< rgb8_image_t >( "S09N3P02.PNG" );
 536     test_png_scanline_reader< rgb8_image_t >( "S09N3P02.PNG" );
 537
 538     // S32I3P04 - 32x32 paletted file, interlaced
 539     test_file< rgb8_image_t >( "S32I3P04.PNG" );
 540
 541     // S32N3P04 - 32x32 paletted file, no interlacing
 542     test_file< rgb8_image_t >( "S32N3P04.PNG" );
 543     test_png_scanline_reader< rgb8_image_t >( "S32N3P04.PNG" );
 544
 545     // S33I3P04 - 33x33 paletted file, interlaced
 546     test_file< rgb8_image_t >( "S33I3P04.PNG" );
 547
 548     // S33N3P04 - 33x33 paletted file, no interlacing
 549     test_file< rgb8_image_t >( "S33N3P04.PNG" );
 550     test_png_scanline_reader< rgb8_image_t >( "S33N3P04.PNG" );
 551
 552     // S34I3P04 - 34x34 paletted file, interlaced
 553     test_file< rgb8_image_t >( "S34I3P04.PNG" );
 554
 555     // S34N3P04 - 34x34 paletted file, no interlacing
 556     test_file< rgb8_image_t >( "S34N3P04.PNG" );
 557     test_png_scanline_reader< rgb8_image_t >( "S34N3P04.PNG" );
 558
 559     // S35I3P04 - 35x35 paletted file, interlaced
 560     test_file< rgb8_image_t >( "S35I3P04.PNG" );
 561
 562     // S35N3P04 - 35x35 paletted file, no interlacing
 563     test_file< rgb8_image_t >( "S35N3P04.PNG" );
 564     test_png_scanline_reader< rgb8_image_t >( "S35N3P04.PNG" );
 565
 566     // S36I3P04 - 36x36 paletted file, interlaced
 567     test_file< rgb8_image_t >( "S36I3P04.PNG" );
 568
 569     // S36N3P04 - 36x36 paletted file, no interlacing
 570     test_file< rgb8_image_t >( "S36N3P04.PNG" );
 571     test_png_scanline_reader< rgb8_image_t >( "S36N3P04.PNG" );
 572
 573     // S37I3P04 - 37x37 paletted file, interlaced
 574     test_file< rgb8_image_t >( "S37I3P04.PNG" );
 575
 576     // S37N3P04 - 37x37 paletted file, no interlacing
 577     test_file< rgb8_image_t >( "S37N3P04.PNG" );
 578     test_png_scanline_reader< rgb8_image_t >( "S37N3P04.PNG" );
 579
 580     // S38I3P04 - 38x38 paletted file, interlaced
 581     test_file< rgb8_image_t >( "S38I3P04.PNG" );
 582
 583     // S38N3P04 - 38x38 paletted file, no interlacing
 584     test_file< rgb8_image_t >( "S38N3P04.PNG" );
 585     test_png_scanline_reader< rgb8_image_t >( "S38N3P04.PNG" );
 586
 587     // S39I3P04 - 39x39 paletted file, interlaced
 588     test_file< rgb8_image_t >( "S39I3P04.PNG" );
 589
 590     // S39N3P04 - 39x39 paletted file, no interlacing
 591     test_file< rgb8_image_t >( "S39N3P04.PNG" );
 592     test_png_scanline_reader< rgb8_image_t >( "S39N3P04.PNG" );
 593
 594     // S40I3P04 - 40x40 paletted file, interlaced
 595     test_file< rgb8_image_t >( "S40I3P04.PNG" );
 596
 597     // S40N3P04 - 40x40 paletted file, no interlacing
 598     test_file< rgb8_image_t >( "S40N3P04.PNG" );
 599     test_png_scanline_reader< rgb8_image_t >( "S40N3P04.PNG" );
 600 }
 601
 602 BOOST_AUTO_TEST_CASE( background_test )
 603 {
 604     // BGAI4A08 - 8 bit grayscale, alpha, no background chunk, interlaced
 605     test_file< gray_alpha8_image_t >( "BGAI4A08.PNG" );
 606
 607     // BGAI4A16 - 16 bit grayscale, alpha, no background chunk, interlaced
 608     test_file< gray_alpha16_image_t >( "BGAI4A16.PNG" );
 609
 610     // BGAN6A08 - 3x8 bits rgb color, alpha, no background chunk
 611     test_file< rgba8_image_t >( "BGAN6A08.PNG" );
 612
 613     // BGAN6A16 - 3x16 bits rgb color, alpha, no background chunk
 614     test_file< rgba16_image_t >( "BGAN6A16.PNG" );
 615
 616     // BGBN4A08 - 8 bit grayscale, alpha, black background chunk
 617     test_file< gray_alpha8_image_t >( "BGBN4A08.PNG" );
 618
 619     // BGGN4A16 - 16 bit grayscale, alpha, gray background chunk
 620     test_file< gray_alpha16_image_t >( "BGGN4A16.PNG" );
 621
 622     // BGWN6A08 - 3x8 bits rgb color, alpha, white background chunk
 623     test_file< rgba8_image_t >( "BGWN6A08.PNG" );
 624
 625     // BGYN6A16 - 3x16 bits rgb color, alpha, yellow background chunk
 626     test_file< rgba16_image_t >( "BGYN6A16.PNG" );
 627 }
 628
 629 BOOST_AUTO_TEST_CASE( transparency_test )
 630 {
 631     // TBBN1G04 - transparent, black background chunk
 632     // file missing
 633     //test_file< gray_alpha8_image_t >( "TBBN1G04.PNG" );
 634
 635     // TBBN2C16 - transparent, blue background chunk
 636     test_file< rgba16_image_t >( "TBBN2C16.PNG" );
 637
 638     // TBBN3P08 - transparent, black background chunk
 639     test_file< rgba8_image_t >( "TBBN3P08.PNG" );
 640
 641     // TBGN2C16 - transparent, green background chunk
 642     test_file< rgba16_image_t >( "TBGN2C16.PNG" );
 643
 644     // TBGN3P08 - transparent, light-gray background chunk
 645     test_file< rgba8_image_t >( "TBGN3P08.PNG" );
 646
 647     // TBRN2C08 - transparent, red background chunk
 648     test_file< rgba8_image_t >( "TBRN2C08.PNG" );
 649
 650     // TBWN1G16 - transparent, white background chunk
 651     test_file< gray_alpha16_image_t >( "TBWN0G16.PNG" );
 652
 653     // TBWN3P08 - transparent, white background chunk
 654     test_file< rgba8_image_t >( "TBWN3P08.PNG" );
 655
 656     // TBYN3P08 - transparent, yellow background chunk
 657     test_file< rgba8_image_t >( "TBYN3P08.PNG" );
 658
 659     // TP0N1G08 - not transparent for reference (logo on gray)
 660     test_file< gray8_image_t >( "TP0N0G08.PNG" );
 661
 662     // TP0N2C08 - not transparent for reference (logo on gray)
 663     test_file< rgb8_image_t >( "TP0N2C08.PNG" );
 664
 665     // TP0N3P08 - not transparent for reference (logo on gray)
 666     test_file< rgb8_image_t >( "TP0N3P08.PNG" );
 667
 668     // TP1N3P08 - transparent, but no background chunk
 669     test_file< rgba8_image_t >( "TP1N3P08.PNG" );
 670 }
 671
 672 BOOST_AUTO_TEST_CASE( gamma_test )
 673 {
 674     // G03N0G16 - grayscale, file-gamma = 0.35
 675     test_file< gray16_image_t >( "G03N0G16.PNG" );
 676
 677     // G03N2C08 - color, file-gamma = 0.35
 678     test_file< rgb8_image_t >( "G03N2C08.PNG" );
 679
 680     // G03N3P04 - paletted, file-gamma = 0.35
 681     test_file< rgb8_image_t >( "G03N3P04.PNG" );
 682
 683     // G04N0G16 - grayscale, file-gamma = 0.45
 684     test_file< gray16_image_t >( "G04N0G16.PNG" );
 685
 686     // G04N2C08 - color, file-gamma = 0.45
 687     test_file< rgb8_image_t >( "G04N2C08.PNG" );
 688
 689     // G04N3P04 - paletted, file-gamma = 0.45
 690     test_file< rgb8_image_t >( "G04N3P04.PNG" );
 691
 692     // G05N0G16 - grayscale, file-gamma = 0.55
 693     test_file< gray16_image_t >( "G05N0G16.PNG" );
 694
 695     // G05N2C08 - color, file-gamma = 0.55
 696     test_file< rgb8_image_t >( "G05N2C08.PNG" );
 697
 698     // G05N3P04 - paletted, file-gamma = 0.55
 699     test_file< rgb8_image_t >( "G05N3P04.PNG" );
 700
 701     // G07N0G16 - grayscale, file-gamma = 0.70
 702     test_file< gray16_image_t >( "G07N0G16.PNG" );
 703
 704     // G07N2C08 - color, file-gamma = 0.70
 705     test_file< rgb8_image_t >( "G07N2C08.PNG" );
 706
 707     // G07N3P04 - paletted, file-gamma = 0.70
 708     test_file< rgb8_image_t >( "G07N3P04.PNG" );
 709
 710     // G10N0G16 - grayscale, file-gamma = 1.00
 711     test_file< gray16_image_t >( "G10N0G16.PNG" );
 712
 713     // G10N2C08 - color, file-gamma = 1.00
 714     test_file< rgb8_image_t >( "G10N2C08.PNG" );
 715
 716     // G10N3P04 - paletted, file-gamma = 1.00
 717     test_file< rgb8_image_t >( "G10N3P04.PNG" );
 718
 719     // G25N0G16 - grayscale, file-gamma = 2.50
 720     test_file< gray16_image_t >( "G25N0G16.PNG" );
 721
 722     // G25N2C08 - color, file-gamma = 2.50
 723     test_file< rgb8_image_t >( "G25N2C08.PNG" );
 724
 725     // G25N3P04 - paletted, file-gamma = 2.50
 726     test_file< rgb8_image_t >( "G25N3P04.PNG" );
 727 }
 728
 729 #endif // BOOST_GIL_IO_USE_PNG_TEST_SUITE_IMAGES
 730
 731 BOOST_AUTO_TEST_SUITE_END()