#include "FreeImage.h"

typedef struct {
	int r, g, b;
} pixel;

pixel **read_img(char *name, int *width, int *height) {
	FIBITMAP *image;
	int i,j;
	RGBQUAD aPixel;
	pixel **data;

	if((image = FreeImage_Load(FIF_TIFF, name, 0)) == NULL) {
		perror("FreeImage_Load");
		return NULL;
	}      

	*width = FreeImage_GetWidth(image);
	*height = FreeImage_GetHeight(image);

	data = (pixel **)malloc((*height)*sizeof(pixel *));
	for(i = 0 ; i < (*height) ; i++) {
		data[i] = (pixel *)malloc((*width)*sizeof(pixel));
		for(j = 0 ; j < (*width) ; j++) {
			FreeImage_GetPixelColor(image, j, i, &aPixel);

			data[i][j].r = (aPixel.rgbRed);
			data[i][j].g = (aPixel.rgbGreen);
			data[i][j].b = (aPixel.rgbBlue);
		}
	}

	FreeImage_Unload(image);
	return data;
}


/* A simple thresholding filter.
*/

void MyFilter(Pixel** data){
        int x,y;

        for (x=0; x < myIm_Width; x++)
                for (y=0; y < myIm_Height; y++){
                        if (data[x][y].B > 128)
                                data[x][y].B = 255;
                        else
                                data[x][y].B = 0;

                        if (data[x][y].G > 128)
                                data[x][y].G = 255;
                        else
                                data[x][y].G = 0;

                        if (data[x][y].R > 128)
                                data[x][y].R = 255;
                        else
                                data[x][y].R = 0;
                }
}


void write_img(char *name, pixel **data, int width, int height) {
	FIBITMAP *image;
	RGBQUAD aPixel;
	int i,j;

	image = FreeImage_Allocate(width, height, 24, 0, 0, 0);

	if(!image) {
		perror("FreeImage_Allocate");
		return;
	}

	for(i = 0 ; i < height ; i++) {
		for(j = 0 ; j < width ; j++) {
			aPixel.rgbRed = data[i][j].r;
			aPixel.rgbGreen = data[i][j].g;
			aPixel.rgbBlue = data[i][j].b;

			FreeImage_SetPixelColor(image, j, i, &aPixel);
		}
	}

	if(!FreeImage_Save(FIF_TIFF, image, name, 0)) {
		perror("FreeImage_Save");
	}

	FreeImage_Unload(image);
}

int main() {
	pixel **data;
	int w, h;

	data = read_img("spit06.tif", &w, &h);
	write_img("backup.tif", data, w, h);

	return 0;
}