57 lines
1.1 KiB
C++
57 lines
1.1 KiB
C++
/*
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Nome: Mario
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Cognome: Montanari
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Classe: 3AIN
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Data: 28/04/2025
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*/
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#include <iostream>
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#pragma pack(1)
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using namespace std;
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typedef struct {
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char bfType[2];
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int bfSize;
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int bfReserved;
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int bfOffBits;
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} BITMAPFILEHEADER;
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int main(void) {
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cout << "sizeof(BITMAPFILEHEADER): " << sizeof(BITMAPFILEHEADER) << endl;
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FILE * file = fopen("carpet.bmp", "rb");
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if (file != NULL) {
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int bfOffBits;
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BITMAPFILEHEADER bf;
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fread(&bf, sizeof(bf), 1, file);
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// VANNO BENE QUESTI DUE METODI:
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// METODO 1
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cout << "bfType: " << bf.bfType[0] << bf.bfType[1] << endl;
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cout << "bfSize: " << bf.bfSize << endl;
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cout << "bfReserved: " << bf.bfReserved << endl;
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cout << "bfOffBits: " << bf.bfOffBits << endl;
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// METODO 2
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// fseek(file, 10, SEEK_SET);
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// fread(&bfOffBits, sizeof(bfOffBits), 1, file);
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unsigned char rgb[3];
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fseek(file, bfOffBits, SEEK_SET);
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fread(&rgb, sizeof(rgb), 1, file);
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cout << "B: " << (int)rgb[0] << " G: " << (int)rgb[1] << " R: " << (int)rgb[2] << endl;
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fclose(file);
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} else {
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perror("Error (source)");
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}
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return 0;
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} |