Witam, mam problem z podzieleniem pliku na mniejsze, musze to zrobić w 'przemyślany sposób zgodnie z własną inwencją' wg prowadzącego.. I niestety gdy probuje to robić wyrzuca mi pelno bledow.. Oto kod:
#include <iostream>
#include <fstream>
using namespace std;
typedef unsigned short uint16;
typedef unsigned int uint32;
typedef struct bmp_file_header {
uint16 filetype; // BM
uint32 filesize; // in 32-bit integers
uint32 reserved; // must be 0
uint32 offset; // byte offset to start of data
uint32 bytesInHeader; // 40
uint32 width; // in pixels
uint32 height; // in pixels
uint16 planes; // 1
uint16 bitsPerPixel; // 1,4,8, or 24
uint32 compression; // 0 = none, 1 = 8bit RLE, 2 = 4 bit RLE
uint32 size; // of image, in bytes
uint32 horizRes; // in pixels/m
uint32 vertRes; // "
uint32 indicesUsed; // # color indices used by the bitmap
uint32 indicesImportant; // # important indices (0=all)
} BMPFileHeader;
#define MAX_SHADES 10
#define DEBUG 1
uint16 extractShort ( ifstream &f )
{
char buf[2];
f.read ( buf, 2 );
uint16 value = buf[0] | (buf[1] << 8);
return value;
}
uint32 extractInt ( ifstream &f )
{
char buf[4];
f.read ( buf, 4 );
uint32 value = buf[0] | (buf[1] << 8) | (buf[2] << 16) | (buf[3] << 24);
return value;
}
void readHeader ( ifstream& f, BMPFileHeader& header )
{
header.filetype = extractShort ( f );
header.filesize = extractInt ( f );
header.reserved = extractInt ( f );
header.offset = extractInt ( f );
header.bytesInHeader = extractInt ( f );
header.width = extractInt ( f );
header.height = extractInt ( f );
header.planes = extractShort ( f );
header.bitsPerPixel = extractShort ( f );
header.compression = extractInt ( f );
header.size = extractInt ( f );
header.horizRes = extractInt ( f );
header.vertRes = extractInt ( f );
header.indicesUsed = extractInt ( f );
header.indicesImportant = extractInt ( f );
#ifdef DEBUG
cout << "filetype " << header.filetype << endl;
cout << "filesize " << header.filesize << endl;
cout << "reserved " << header.reserved << endl;
cout << "offset " << header.offset << endl;
cout << "bytesInHeader " << header.bytesInHeader << endl;
cout << "width " << int(header.width) << endl;
cout << "height " << int(header.height) << endl;
cout << "planes " << header.planes << endl;
cout << "bitsPerPixel " << header.bitsPerPixel << endl;
cout << "compression " << header.compression << endl;
cout << "size " << header.size << endl;
cout << "horizRes " << header.horizRes << endl;
cout << "vertRes " << header.vertRes << endl;
cout << "indicesUsed " << header.indicesUsed << endl;
cout << "indicesImportant " << header.indicesImportant << endl;
#endif
}
int main()
{
int width, height;
unsigned char *image;
char shades[MAX_SHADES] = {'#','$','O','=','+','|','-','^','.',' '};
//char shades[MAX_SHADES] = {'0','1','2','3','4','5','6','7','8','9'};
int average_color = 0;
ifstream bmpfile;
ofstream txtfile;
BMPFileHeader header;
// Open the image file
bmpfile.open ( "source.bmp", ios::in | ios::binary );
if ( ! bmpfile ) {
cout << "cannot open source.bmp" << endl;
return 1;
}
// Read header
readHeader ( bmpfile, header );
// Read image
width = int(header.width);
if ( width < 0 )
width *= -1;
height = int(header.height);
if ( height < 0 )
height *= -1;
int rowsize = width * 3;
image = new unsigned char [ rowsize * height ];
bmpfile.seekg ( header.offset, ios::beg );
bmpfile.read ( (char *)image, 3*width*height );
bmpfile.close();
// write the output file
txtfile.open ( "art.txt", ios::out );
for(int y = height-1; y >= 0; y--) {
for(int x = 0; x < width; x++) {
// Get the average color
average_color = ( image[x*3 + y*rowsize] +
image[x*3 + 1 + y*rowsize] +
image[x*3 + 2 + y*rowsize] ) / 3;
// Convert to a shade
average_color /= (256/MAX_SHADES);
if(average_color >= MAX_SHADES)
average_color = MAX_SHADES-1;
// Output
txtfile << shades[average_color];
}
txtfile << endl;
}
txtfile.close();
return 0;
}
- projekt.rar (230 KB) - ściągnięć: 101
C++ 