ccd.cpp

来自「用VC編的數碼相機仿真程序 包括圖像的預處理 DCT變換 壓縮等 最后可用ver」· C++ 代码 · 共 71 行

/*
* writen by shikosan
* File name: ccd.cpp
* 仿真CCD
*/

#include "ccd.h"

#include <stdio.h>
#define SZ_ROW       64
#define SZ_COL      (128 + 2)
static FILE *imageFileHandle;

// change char into unsigned char by shikosan
// static char buffer[SZ_ROW][SZ_COL];  
static unsigned char buffer[SZ_ROW][SZ_COL]; 


static int rowIndex, colIndex;

// This function is passed name of image file
void CcdInitialize(const char *imageFileName) 
{
    imageFileHandle = fopen(imageFileName, "r");
    rowIndex = -1;
    colIndex = -1;
}

// This file reads “image” from file
void CcdCapture(void) 
{
	// change int to uchar

	unsigned char pixel;
  rewind(imageFileHandle);
  for(rowIndex=0; rowIndex<SZ_ROW; rowIndex++) 
  {
    for(colIndex=0; colIndex<SZ_COL; colIndex++) 
    {
      if( fscanf(imageFileHandle, "%i", &pixel)==1 ) 
      {
		 // buffer[rowIndex][colIndex] = (char)pixel
         buffer[rowIndex][colIndex] = (unsigned char)pixel;  // Change char into uchar 4-24-2008
      }
    }
  }
  rowIndex = 0;
  colIndex = 0;
}

// This function outputs pixels one at a time
// Change char into uchar 
// char CcdPopPixel(void) 
unsigned char CcdPopPixel(void) 
{
  // Change char into uchar 
	unsigned char pixel;
  //char pixel;
  pixel = buffer[rowIndex][colIndex];
  if( ++colIndex == SZ_COL ) 
  {
    colIndex = 0;
    if( ++rowIndex == SZ_ROW ) 
    {
      colIndex = -1;
      rowIndex = -1;
    }
  }
  return pixel;
}