REFACTOR: Expanded many parameter names for functions.

DOCS: Corrected comments to match new parameters.
CHORE: Moved some variable definition to top of function call.

include/image/filters.h

@@ -107,11 +107,11 @@ u32_mask(const unsigned int clr, const char keep);
  * it is just rotated back to original position. Cannot be greater than 8
  * because the calculations would result in a negative.
  * @param[in] clr Packed Pixel
- * @param[in] n Amount of times to move bits to left.
+ * @param[in] dist Distance from original position to move each bit to the left.
  * @return unsigned int Packed Pixel with newly moved bits
  */
 unsigned int
-u32_rotl(const unsigned int clr, const int n);
+u32_rotl(const unsigned int clr, const int dist);
 
 /**
  * @brief Raises Color Vibrance
@@ -139,13 +139,13 @@ u32_avg_gb(const unsigned int clr);
  * them. Then it moves to the next pixel doing the same. Then it does the second
  * loop from top to bottom doing the same principle. This can take some time
  * depending on hardware, image size, radius, etc.
- * @param[in] src_buf The image buffer to be blurred
- * @param[in] img the PPM image container
+ * @param[in] buf The image buffer to be blurred
+ * @param[in] metadata the PPM image container
  * @param[in] radius The amount of pixels around the left and right, then top
  * and bottom to mix with the currently selected pixel
  * @return unsigned int Pointer to new created image buffer.
  */
 unsigned int*
-u32_box_blur(const unsigned int* src_buf, const PPM* img, const int radius);
+u32_box_blur(const unsigned int* buf, const PPM* metadata, const int radius);
 
 #endif