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src/dlib/external/libpng/README  view on Meta::CPAN

       examples         =>  Example programs
       gregbook         =>  source code for PNG reading and writing, from
                            Greg Roelofs' "PNG: The Definitive Guide",
                            O'Reilly, 1999
       libtests         =>  Test programs
       pngminim         =>  Minimal decoder, encoder, and progressive decoder
                            programs demonstrating use of pngusr.dfa
       pngminus         =>  Simple pnm2png and png2pnm programs
       pngsuite         =>  Test images
       tools            =>  Various tools
       visupng      =>  Contains a MSVC workspace for VisualPng
      projects      =>  Contains project files and workspaces for
                        building a DLL
       owatcom          =>  Contains a WATCOM project for building libpng
       visualc71        =>  Contains a Microsoft Visual C++ (MSVC)
                            workspace for building libpng and zlib
       vstudio          =>  Contains a Microsoft Visual C++ (MSVC)
                            workspace for building libpng and zlib
      scripts       =>  Directory containing scripts for building libpng:
                            (see scripts/README.txt for the list of scripts)

src/dlib/external/libpng/png.h  view on Meta::CPAN

    * the correct thing.
    */

PNG_EXPORT(175, void, png_set_unknown_chunk_location,
    (png_const_structrp png_ptr, png_inforp info_ptr, int chunk, int location));

PNG_EXPORT(176, int, png_get_unknown_chunks, (png_const_structrp png_ptr,
    png_inforp info_ptr, png_unknown_chunkpp entries));
#endif

/* Png_free_data() will turn off the "valid" flag for anything it frees.
 * If you need to turn it off for a chunk that your application has freed,
 * you can use png_set_invalid(png_ptr, info_ptr, PNG_INFO_CHNK);
 */
PNG_EXPORT(177, void, png_set_invalid, (png_const_structrp png_ptr,
    png_inforp info_ptr, int mask));

#ifdef PNG_INFO_IMAGE_SUPPORTED
/* The "params" pointer is currently not used and is for future expansion. */
PNG_EXPORT(178, void, png_read_png, (png_structrp png_ptr, png_inforp info_ptr,
    int transforms, png_voidp params));

src/dlib/external/libpng/pngread.c  view on Meta::CPAN

      {
         red = PNG_sRGB_FROM_LINEAR(red * 255);
         green = PNG_sRGB_FROM_LINEAR(green * 255);
         blue = PNG_sRGB_FROM_LINEAR(blue * 255);
         encoding = E_sRGB;
      }
   }

   else if (encoding == E_LINEAR8)
   {
      /* This encoding occurs quite frequently in test cases because PngSuite
       * includes a gAMA 1.0 chunk with most images.
       */
      red *= 257;
      green *= 257;
      blue *= 257;
      alpha *= 257;
      encoding = E_LINEAR;
   }

   else if (encoding == E_sRGB && (convert_to_Y || output_encoding == E_LINEAR))