Получение неверной ширины при декодировании растрового изображения

У меня ошибка в исходном коде, из-за которой растровые изображения выглядят слишком широкими. например, он напечатает ширину, высоту и высоту идеально (256), а ширина также должна быть 256, но программы говорят, что она составляет миллиарды пикселей в ширину и каждый раз отличается. вот исходный код

#include "glob.h"
/* Image type - contains height, width, and data */
struct Image {
unsigned long sizeX;
unsigned long sizeY;
char *data;
};
typedef struct Image Image;

int ImageLoad(char *filename, Image *image) {
FILE *file;
unsigned long size;                 // size of the image in bytes.
unsigned long i;                    // standard counter.
unsigned short int planes;          // number of planes in image (must be 1)
unsigned short int bpp;             // number of bits per pixel (must be 24)
char temp;                          // temporary color storage for bgr-rgb conversion.

// make sure the file is there.
if ((file = fopen(filename, "rb"))==NULL){
printf("bitmap Not Found : %s\n",filename);
return 0;
}

// seek through the bmp header, up to the width/height:
fseek(file, 18, SEEK_CUR);

// read the width
if ((i = fread(&image->sizeX, 4, 1, file)) != 1) {
printf("Error reading width from %s.\n", filename);
return 0;
}
printf("Width of %s: %lu\n", filename, image->sizeX);

// read the height
if ((i = fread(&image->sizeY, 4, 1, file)) != 1) {
printf("Error reading height from %s.\n", filename);
return 0;
}
printf("Height of %s: %lu\n", filename, image->sizeY);

// calculate the size (assuming 24 bits or 3 bytes per pixel).
size = image->sizeX * image->sizeY * 3;

// read the planes
if ((fread(&planes, 2, 1, file)) != 1) {
printf("Error reading planes from %s.\n", filename);
return 0;
}
if (planes != 1) {
printf("Planes from %s is not 1: %u\n", filename, planes);
return 0;
}

// read the bpp
if ((i = fread(&bpp, 2, 1, file)) != 1) {
printf("Error reading bpp from %s.\n", filename);
return 0;
}
if (bpp != 24) {
printf("Bpp from %s is not 24: %u\n", filename, bpp);
return 0;
}

// seek past the rest of the bitmap header.
fseek(file, 24, SEEK_CUR);

// read the data.
image->data = (char *) malloc(size);
if (image->data == NULL) {
printf("Error allocating memory for color-corrected image data\n");
return 0;
}

if ((i = fread(image->data, size, 1, file)) != 1) {
printf("Error reading image data from %s.\n", filename);
return 0;
}

for (i=0; i<size; i+=3) { // reverse all of the colors. (bgr -> rgb)
temp = image->data[i];
image->data[i] = image->data[i+2];
image->data[i+2] = temp;
}

// we're done.
return 0;
}

// Load Bitmaps And Convert To Textures
void glob::LoadGLTextures() {
// Load Texture
Image *image1;

// allocate space for texture
image1 = (Image *) malloc(sizeof(Image));
if (image1 == NULL) {
printf("(image1 == NULL)\n");
exit(0);
}

ImageLoad("data/textures/NeHe.bmp", image1);

// Create Texture
glGenTextures(1, &texture);
glBindTexture(GL_TEXTURE_2D, texture);   // 2d texture (x and y size)

glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR); // scale linearly when image bigger than texture
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR); // scale linearly when image smalled than texture

// 2d texture, level of detail 0 (normal), 3 components (red, green, blue), x size from image, y size from image,
// border 0 (normal), rgb color data, unsigned byte data, and finally the data itself.
glTexImage2D(GL_TEXTURE_2D, 0, 3, image1->sizeX, image1->sizeY, 0, GL_RGB, GL_UNSIGNED_BYTE, image1->data);
};

glob.h это:

#ifndef GLOB_H_INCLUDED
#define GLOB_H_INCLUDED

#include <iostream>
#include <stdlib.h>
#include <stdio.h>      // Header file for standard file i/o.

#include <GL/glx.h>    /* this includes the necessary X headers */
#include <GL/gl.h>
//#include <GL/glut.h>    // Header File For The GLUT Library
//#include <GL/glu.h>   // Header File For The GLu32 Library

#include <X11/X.h>    /* X11 constant (e.g. TrueColor) */
#include <X11/keysym.h>

class glob {
bool Running;
GLuint texture; //make an array when we start using more then 1
Display     *dpy;
Window       win;
XEvent       event;
GLboolean    doubleBuffer;
GLboolean    needRedraw;
GLfloat      xAngle, yAngle, zAngle;
float        camera_x, camera_y, camera_z;
public:
glob();
int OnExecute();
public:
int init(int argc, char **argv);
void LoadGLTextures();
void OnEvent();
void redraw(void);
};

#endif // GLOB_H_INCLUDED

Может ли тело помочь мне решить эту проблему?