initial commit

tools/img2bw/src/main.c

@@ -0,0 +1,62 @@
+// $ gcc -o img21bppraw img21bppraw.c -lfreeimage
+
+#include <stdio.h>
+#include <FreeImage.h>
+
+FIBITMAP * loadimage(const char * input)
+{
+    FREE_IMAGE_FORMAT fif;
+	FIBITMAP * image = 0;
+
+	fif = FreeImage_GetFileType((const char *) input, 0);
+	if ( fif == FIF_UNKNOWN ) {
+		return 0;
+	}
+
+	image = FreeImage_Load(fif, (const char *) input, BMP_DEFAULT);
+	FreeImage_FlipVertical(image);
+
+	return image;
+}
+
+int main(int argc, char ** argv)
+{
+	int bpp;
+	FILE * f;
+	if ( argc != 3 )
+		return -1;
+
+	FIBITMAP * img = loadimage(argv[1]);
+	if ( img == 0 )
+		return -2;
+
+	f = fopen(argv[2], "wb");
+	if ( f== 0 )
+		return -3;
+
+	bpp = FreeImage_GetBPP(img);
+	unsigned char * bits = FreeImage_GetBits(img);
+	int i, w, h;
+
+	w = FreeImage_GetWidth(img);
+	h = FreeImage_GetHeight(img);
+
+	unsigned char buffer = 0, b = 0;
+
+	for ( i = w * h ; i > 0 ; i--, bits += (bpp / 8)) {
+		if ( *bits > 0 )
+			buffer |= (1<<b);
+		b++;
+
+		if ( b == 8 ) {
+			fwrite(& buffer, 1, 1, f);
+			b = 0;
+			buffer = 0;
+		}
+	}
+
+	FreeImage_Unload(img);
+	fclose(f);
+
+	return 0;
+}