#define JCS_EXTENSIONS 1
#define JCS_ALPHA_EXTENSIONS 1

typedef enum {
           JCS_UNKNOWN,                     /* error/unspecified */
           JCS_GRAYSCALE,                     /* monochrome */
           JCS_RGB,                     /* red/green/blue as specified by the RGB_RED, RGB_GREEN,
                                          RGB_BLUE, and RGB_PIXELSIZE macros */
           JCS_YCbCr,                     /* Y/Cb/Cr (also known as YUV) */
           JCS_CMYK,                     /* C/M/Y/K */
           JCS_YCCK,                     /* Y/Cb/Cr/K */
           JCS_EXT_RGB,                     /* red/green/blue */
           JCS_EXT_RGBX,                     /* red/green/blue/x */
           JCS_EXT_BGR,                     /* blue/green/red */
           JCS_EXT_BGRX,                     /* blue/green/red/x */
           JCS_EXT_XBGR,                     /* x/blue/green/red */
           JCS_EXT_XRGB,                     /* x/red/green/blue */
           /* When out_color_space it set to JCS_EXT_RGBX, JCS_EXT_BGRX,
            JCS_EXT_XBGR, or JCS_EXT_XRGB during decompression, the X byte is
            undefined, and in order to ensure the best performance,
            libjpeg-turbo can set that byte to whatever value it wishes.  Use
            the following colorspace constants to ensure that the X byte is set
            to 0xFF, so that it can be interpreted as an opaque alpha
            channel. */
           JCS_EXT_RGBA,                     /* red/green/blue/alpha */
           JCS_EXT_BGRA,                     /* blue/green/red/alpha */
           JCS_EXT_ABGR,                     /* alpha/blue/green/red */
           JCS_EXT_ARGB                     /* alpha/red/green/blue */
} J_COLOR_SPACE;

{$MINENUMSIZE 4}
...
// New in libJPEG-turbo
{$DEFINE JCS_EXTENSIONS}
{$DEFINE JCS_ALPHA_EXTENSIONS}

  // jpeglib.h line 219
  J_COLOR_SPACE = (
    JCS_UNKNOWN,    { error/unspecified }
    JCS_GRAYSCALE,  { monochrome }
    JCS_RGB,        { red/green/blue }
    JCS_YCbCr,      { Y/Cb/Cr (also known as YUV) }
    JCS_CMYK,      { C/M/Y/K }
    JCS_YCCK        { Y/Cb/Cr/K }
    {$IFDEF JCS_EXTENSIONS},
    JCS_EXT_RGB,                     { red/green/blue }
    JCS_EXT_RGBX,                     { red/green/blue/x }
    JCS_EXT_BGR,                     { blue/green/red }
    JCS_EXT_BGRX,                     { blue/green/red/x }
    JCS_EXT_XBGR,                     { x/blue/green/red }
    JCS_EXT_XRGB                     { x/red/green/blue }
    {$IFDEF JCS_ALPHA_EXTENSIONS},
    { When out_color_space it set to JCS_EXT_RGBX, JCS_EXT_BGRX,
      JCS_EXT_XBGR, or JCS_EXT_XRGB during decompression, the X byte is
      undefined, and in order to ensure the best performance,
      libjpeg-turbo can set that byte to whatever value it wishes.  Use
      the following colorspace constants to ensure that the X byte is set
      to 0xFF, so that it can be interpreted as an opaque alpha
      channel. }
    JCS_EXT_RGBA,                     { red/green/blue/alpha }
    JCS_EXT_BGRA,                     { blue/green/red/alpha }
    JCS_EXT_ABGR,                     { alpha/blue/green/red }
    JCS_EXT_ARGB                     { alpha/red/green/blue }
    {$ENDIF}
    {$ENDIF}
  );

struct jpeg_compress_struct {
  ...
#if JPEG_LIB_VERSION >= 70
  unsigned int scale_num, scale_denom; /* fraction by which to scale image */

  JDIMENSION jpeg_width;           /* scaled JPEG image width */
  JDIMENSION jpeg_height;           /* scaled JPEG image height */
  /* Dimensions of actual JPEG image that will be written to file,
  * derived from input dimensions by scaling factors above.
  * These fields are computed by jpeg_start_compress().
  * You can also use jpeg_calc_jpeg_dimensions() to determine these values
  * in advance of calling jpeg_start_compress().
  */
#endif
  ...
#if JPEG_LIB_VERSION >= 70
  int q_scale_factor[NUM_QUANT_TBLS];
#endif
  ...
#if JPEG_LIB_VERSION >= 70
  boolean do_fancy_downsampling; /* TRUE=apply fancy downsampling */
#endif
  ...
#if JPEG_LIB_VERSION >= 70
  int min_DCT_h_scaled_size;           /* smallest DCT_h_scaled_size of any component */
  int min_DCT_v_scaled_size;           /* smallest DCT_v_scaled_size of any component */
#endif
  ...
#if JPEG_LIB_VERSION >= 80
  int block_size;                     /* the basic DCT block size: 1..16 */
  const int * natural_order;           /* natural-order position array */
  int lim_Se;                               /* min( Se, DCTSIZE2-1 ) */
#endif
  ...
};

Type TData=record A,B:integer;end; // для библиотеки 1 версии
Type TData=record A,B:integer;C:float;end; // для библиотеки второй версии

{.$DEFINE LIB_VER_1}
{.$DEFINE LIB_VER_2}
{$DEFINE LIB_VER_3}

{$IFDEF LIB_VER_3}
  {$DEFINE LIB_VER_2}
{$ENDIF}

{$IFDEF LIB_VER_2}
  {$DEFINE LIB_VER_1}
{$ENDIF}

const
{$IFDEF LIB_VER_3}
  LIB_VERSION = 3;
{$ELSE}
{$IFDEF LIB_VER_2}
  LIB_VERSION = 2;
{$ELSE}
  LIB_VERSION = 1;
{$ENDIF}
{$ENDIF}

implementation

{$IFDEF LIB_VER_2}
...
{$ENDIF}

{$IFDEF_LIB_VER_3}
...
{$ELSE}
...
{$ENDIF}

initialization
  LibInit(LIB_VERSION);
finalization
  LibFree;
end.

// RAD Studio XE3 (BDS 10.0) DELPHI and BCB are no longer defined, only COMPILER
{$ifdef VER240}
  {$define COMPILER_17}
{$endif VER230}

// RAD Studio XE2 (BDS 9.0) DELPHI and BCB are no longer defined, only COMPILER
{$ifdef VER230}
  {$define COMPILER_16}
{$endif VER230}

// RAD Studio 2010 (BDS 7.0) DELPHI and BCB are no longer defined, only COMPILER
{$ifdef VER210}
  {$define COMPILER_14}
{$endif VER210}




{$ifdef COMPILER_14}
{$define COMPILER_1_UP}
{$define COMPILER_2_UP}
{$define COMPILER_3_UP}
{$define COMPILER_4_UP}
{$define COMPILER_5_UP}
{$define COMPILER_6_UP}
{$define COMPILER_7_UP}
{$define COMPILER_8_UP}
{$define COMPILER_9_UP}
{$define COMPILER_10_UP}
{$define COMPILER_11_UP}
{$define COMPILER_12_UP}
{$define COMPILER_14_UP}
// Backwards compatibility
{$define DELPHI_2_UP}
{$define DELPHI_3_UP}
{$define DELPHI_4_UP}
{$define DELPHI_5_UP}
{$define DELPHI_6_UP}
{$define DELPHI_7_UP}
{$define DELPHI_8_UP}
{$define DELPHI_9_UP}
{$define CPPB_3_UP}
{$define CPPB_4_UP}
{$define CPPB_5_UP}
{$define CPPB_6_UP}


{$ifdef BCB}
  {$define CPPB}
{$else}
  {$define DELPHI}
{$endif}


{$endif}


{$ifdef COMPILER_16}
{$define COMPILER_1_UP}
{$define COMPILER_2_UP}
{$define COMPILER_3_UP}
{$define COMPILER_4_UP}
{$define COMPILER_5_UP}
{$define COMPILER_6_UP}
{$define COMPILER_7_UP}
{$define COMPILER_8_UP}
{$define COMPILER_9_UP}
{$define COMPILER_10_UP}
{$define COMPILER_11_UP}
{$define COMPILER_12_UP}
{$define COMPILER_14_UP}
{$define COMPILER_16_UP}
{$define BDS_9_UP}
// Backwards compatibility
{$define DELPHI_2_UP}
{$define DELPHI_3_UP}
{$define DELPHI_4_UP}
{$define DELPHI_5_UP}
{$define DELPHI_6_UP}
{$define DELPHI_7_UP}
{$define DELPHI_8_UP}
{$define DELPHI_9_UP}
{$define CPPB_3_UP}
{$define CPPB_4_UP}
{$define CPPB_5_UP}
{$define CPPB_6_UP}


{$ifdef BCB}
  {$define CPPB}
{$else}
  {$define DELPHI}
{$endif}


{$endif}


{$ifdef COMPILER_17}
{$define COMPILER_1_UP}
{$define COMPILER_2_UP}
{$define COMPILER_3_UP}
{$define COMPILER_4_UP}
{$define COMPILER_5_UP}
{$define COMPILER_6_UP}
{$define COMPILER_7_UP}
{$define COMPILER_8_UP}
{$define COMPILER_9_UP}
{$define COMPILER_10_UP}
{$define COMPILER_11_UP}
{$define COMPILER_12_UP}
{$define COMPILER_14_UP}
{$define COMPILER_16_UP}
{$define COMPILER_17_UP}
{$define BDS_9_UP}
// Backwards compatibility
{$define DELPHI_2_UP}
{$define DELPHI_3_UP}
{$define DELPHI_4_UP}
{$define DELPHI_5_UP}
{$define DELPHI_6_UP}
{$define DELPHI_7_UP}
{$define DELPHI_8_UP}
{$define DELPHI_9_UP}
{$define CPPB_3_UP}
{$define CPPB_4_UP}
{$define CPPB_5_UP}
{$define CPPB_6_UP}


{$ifdef BCB}
  {$define CPPB}
{$else}
  {$define DELPHI}
{$endif}


{$endif}