better gcc and types.h

src/types.h

@@ -0,0 +1,18 @@
+#ifndef TYPES_H
+#define TYPES_H
+
+struct Parameters {
+  unsigned long width;
+  unsigned long height;
+  char *file_path;
+  unsigned int size;
+  float slope;
+  float start[3];
+  float var[3];
+};
+
+typedef struct Parameters parameters;
+
+typedef void line_fn(unsigned long y, char *data_buffer);
+
+#endif