/*

     File: commandtosample.c 

 Abstract: Sample CUPS printer driver command filter. 

  Version: 4.0 

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 */  

#include "sample.h"         /* Common sample driver header */

#include <cups/cups.h>          /* CUPS API headers */

/*

 * Local functions...

 */

static void print_self_test_page(const char *user);

/*

 * 'main()' - Main entry for filter.

 */

int                 /* O - Exit status */

main(int  argc,             /* I - Number of command-line args */

     char *argv[])          /* I - Command-line arguments */

{

  ppd_file_t    *ppd;           /* PPD file for printer */

  job_data_t    job;            /* Job data */

  cups_file_t   *fp;            /* Command file */

  char      line[1024],     /* Line from file */

        *value;         /* Pointer to value on line */

  int       linenum;        /* Current line number */

 /*

  * Do common driver initialization stuff.

  */

  if ((ppd = Initialize(argc, argv, &job)) == NULL)

    return (1);

 /*

  * Open the command file as needed...

  */

  if (argc == 7)

  {

    if ((fp = cupsFileOpen(argv[6], "r")) == NULL)

    {

      LogMessage("ERROR", CFCopyLocalizedString(CFSTR("Unable to open command file: %s"), NULL), strerror(errno));

      return (1);

    }

  }

  else

    fp = cupsFileStdin();

 /*

  * Read the commands from the file and send the appropriate printer commands...

  *

  * The CUPS command file format is documented here:

  *

  *     http://localhost:631/help/spec-command.html

  */

  linenum = 0;

  while (cupsFileGetConf(fp, line, sizeof(line), &value, &linenum))

  {

   /*

    * Parse the command...

    */

    if (!strcasecmp(line, "ChangeInk"))

    {

     /*

      * Change ink...

      */

      printf("CHANGEINK %s\n", value);

      puts("LEVELS");

      fflush(stdout);

      GetStatus(ppd, 5.0);

    }

    else if (!strcasecmp(line, "Clean"))

    {

     /*

      * Clean heads...

      */

      printf("CLEAN %s\n", value);

    }

    else if (!strcasecmp(line, "PrintSelfTestPage"))

    {

     /*

      * Print a self-test page.

      */

      print_self_test_page(argv[2]);

    }

    else if (!strcasecmp(line, "ReportLevels"))

    {

     /*

      * Report the supply/ink levels...

      */

      puts("LEVELS");

      fflush(stdout);

      GetStatus(ppd, 5.0);

    }

    else

      LogMessage("ERROR", CFCopyLocalizedString(CFSTR("Unknown printer command \"%s\"!"), NULL), line);

  }

  return (0);

}

/*

 * 'print_self_test_page()' - Print a self-test page.

 */

static void

print_self_test_page(const char *user)  /* I - User that requested page */

{

  int       y,          /* Current line */

        color,          /* Current color */

        pass;           /* Current pass */

  unsigned char data[360 * 3],      /* Data for line */

        *dataptr;       /* Pointer into line */

  unsigned char colors[4][3] =      /* Colors for each "ink" */

        {

          { 0, 0, 0 },      /* Black */

          { 0, 255, 255 },  /* Cyan */

          { 255, 0, 255 },  /* Magenta */

          { 255, 255, 0 }   /* Yellow */

        };

 /*

  * The self-test page prints a common head test pattern for each color like

  * this:

  *

  * |----            |

  * |    ----        |

  * |        ----    |

  * |            ----|

  * |----            |

  * |    ----        |

  * |        ----    |

  * |            ----|

  */

  puts("DOCUMENT");

  printf("AUTHOR %s\n", user);

  puts("TITLE Self-Test Page");

  puts("PAGE 0 0 360 72");      /* 5x1" test page */

  puts("RASTER 360 72 3");      /* 72dpi color image */

  for (y = 0; y < 72; y ++)

  {

   /*

    * Clear the line...

    */

    memset(data, 255, sizeof(data));

   /*

    * Add each color...

    */

    for (color = 0, pass = y & 7; color < 4; color ++)

    {

      dataptr = data + color * 96 * 3;

      memcpy(dataptr + 0 * 3, colors[color], 3);

      memcpy(dataptr + 71 * 3, colors[color], 3);

      dataptr += pass * 9 * 3;

      memcpy(dataptr + 0 * 3, colors[color], 3);

      memcpy(dataptr + 1 * 3, colors[color], 3);

      memcpy(dataptr + 2 * 3, colors[color], 3);

      memcpy(dataptr + 3 * 3, colors[color], 3);

      memcpy(dataptr + 4 * 3, colors[color], 3);

      memcpy(dataptr + 5 * 3, colors[color], 3);

      memcpy(dataptr + 6 * 3, colors[color], 3);

      memcpy(dataptr + 7 * 3, colors[color], 3);

      memcpy(dataptr + 8 * 3, colors[color], 3);

    }

   /*

    * Write the line...

    */

    printf("LINE %d\n", (int)sizeof(data));

    fwrite(data, 1, sizeof(data), stdout);

  }

  puts("ENDPAGE");

  puts("ENDDOCUMENT");

 /*

  * Log that we printed a page!

  */

  fputs("PAGE: 1 1\n", stderr);

}