apps/ccam/dma2bmp.c

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/*
 * dma2bmp.c
 * monochrome bmp file format (first - no compression, later - add RLE)
 *
 */
#include <fcntl.h>  /*open*/
#include <unistd.h> /* close */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/mman.h>           /* mmap */

#include "imageaccess.h"
#include "dma2bmp.h"


#define D(x)
#define D1(x)


int dma2bmp (int ImageWidth, int ImageHeight,
                         int Mode,      // 0 - 8 bit(b/w), 1 - 24 bits (color)  -- will add later - now only b/w
                         int Contrast, int Color, int bayerOrient, int Depth, const char * pseudo,
                         const char * ifn, const char * ofn) {

 int Compression=0;
 char * byteLine;
// int i; //,j; // j - debug
 int i; //,j;//, od, bi,bd,dd; // j - debug
 int row;
 int paddedWidth;       // padded to multiple of four width
 unsigned long * plt;

  struct {
  char           Signature[2];
  unsigned long  FileSize;
  unsigned long  reserved1;
  unsigned long  DataOffset;
  unsigned long  Size;
  unsigned long  Width;
  unsigned long  Height;
  unsigned short Planes;
  unsigned short BitCount;
  unsigned long  Compression;
  unsigned long  ImageSize;
  unsigned long  XpixelsPerM;
  unsigned long  YpixelsPerM;
  unsigned long  ColorsUsed;
  unsigned long  ColorsImportant;
  unsigned long  ColorTable[256];

} bmfh;



// struct BITMAPFILEHEADER bmfh;
  /* More stuff */

  FILE * outfile;               /* target file */

  struct pixel_buffers pb;

 // Contrast (0-5) - shift data left by Contrast bits (before shifting right by 2)
    if ((Contrast <0) || (Contrast >5 )) Contrast=0;
    

  /* Step 1: open dma data memory through 1-st filename */

    if (initPixelBuffers(&pb, ifn,ImageWidth,ImageHeight,Contrast, Color, bayerOrient, Depth, pseudo) <0) return -1;

        D1(fprintf (stderr,"width:       %d\r\n",ImageWidth));
        D1(fprintf (stderr,"height:      %d\r\n",ImageHeight));
        D1(fprintf (stderr,"input file:  %s\r\n",ifn));
        D1 (fprintf (stderr,"output file: %s\r\n",ofn));


  /* Step 3: open output file */


        if (ofn) {
          if ((outfile = fopen(ofn, "wb")) == NULL) {
            fprintf(stderr, "can't open %s\n", ofn);
            closePixelBuffers(&pb);
            exit(1);
          }
        } else {
          outfile=stdout;
          D1(fprintf(stderr, "Using stdout\n"));

    }

  /* Step 4: fill header info */

  paddedWidth = ImageWidth & 0x7ffffffc; // zero 2 LSBs;
  if (paddedWidth < ImageWidth) paddedWidth += 4;
  bmfh.Signature[0]=   'B';
  bmfh.Signature[1]=   'M';
  bmfh.FileSize=       paddedWidth*ImageHeight+sizeof(bmfh);    // will adjust later if Compression
  bmfh.reserved1=      0;
  bmfh.DataOffset=     sizeof(bmfh); // 1060
  bmfh.Size=           40;
  bmfh.Width=          ImageWidth;
  bmfh.Height=         ImageHeight;
  bmfh.Planes=         1;
  bmfh.BitCount=       8;
  bmfh.Compression=    Compression;
  bmfh.ImageSize=      paddedWidth*ImageHeight; // will adjust later if Compression
  bmfh.XpixelsPerM=    11811; //300dpi
  bmfh.YpixelsPerM=    11811; //300dpi
  bmfh.ColorsUsed=     256;
  bmfh.ColorsImportant=0;
// use calculated pseudocolor pallet if available, if not - build greyscale
  if ((plt= getPalette (&pb))) memcpy (bmfh.ColorTable,plt,sizeof(bmfh.ColorTable));
  else for (i=0;i<256;i++) bmfh.ColorTable[i]= (unsigned long) i*0x10101;
 
  /* Step 5: write header to file */
  fwrite (&bmfh,sizeof(bmfh),1,outfile);
   
  
  /* Step 6: write raster data line by line */
//  myRowAligned[(paddedWidth>>2)-1]=0;
  for (row=bmfh.Height-1;row>=0;row--) {
    byteLine=getMonoRow (&pb, row, 0);
    fwrite (byteLine,paddedWidth,1,outfile);
  } // for (row=0;row<bmfh.Height;row++)
  D1(fprintf (stderr,"bmfh.FileSize=%ld\r\n",bmfh.FileSize));
  D1(fprintf (stderr,"bmfh.ImageSize=%ld\r\n",bmfh.ImageSize));

  fclose(outfile);
  closePixelBuffers(&pb);

  /* And we're done! */
  return 0;
}

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