it's a shorter name :3

src/image.c

@@ -94,7 +94,7 @@ static uint8_t rgb_to_luma(uint8_t r, uint8_t g, uint8_t b) {
                    + (CAMMY_IMAGE_Y_COEFFICIENT_B * (float)b));
 }
 
-static uint8_t rgb_to_tile_2bpp(uint8_t r, uint8_t g, uint8_t b, size_t x, size_t y) {
+static uint8_t rgb_to_2bpp(uint8_t r, uint8_t g, uint8_t b, size_t x, size_t y) {
     uint8_t gray = rgb_to_luma(r, g, b);
 
     uint32_t slot = bayer_matrix[gray];
@@ -589,7 +589,7 @@ static void copy_bitmap_to_tile(cammy_image *dest,
                        to->x + x,
                        to->y + y,
                        dest->width,
-                       rgb_to_tile_2bpp(r, g, b, to->x + x,
+                       rgb_to_2bpp(r, g, b, to->x + x,
                                             to->y + y));
         }
     }