-#define TILE_PIXEL(_p, _x, _y, _c) \
- ((_p)[((_y) / TILE_VECTOR_HEIGHT) * TILE_Y_STRIDE + \
- ((_x) / TILE_VECTOR_WIDTH) * TILE_X_STRIDE + \
- (_c) * TILE_C_STRIDE + \
- tile_offset[(_y) % TILE_VECTOR_HEIGHT][(_x) % TILE_VECTOR_WIDTH]])
+
+#ifdef DEBUG
+extern unsigned lp_tile_unswizzle_count;
+extern unsigned lp_tile_swizzle_count;
+#endif
+
+
+/**
+ * Return offset of the given pixel (and color channel) from the start
+ * of a tile, in bytes.
+ */
+static INLINE unsigned
+tile_pixel_offset(unsigned x, unsigned y, unsigned c)
+{
+ unsigned ix = (x / TILE_VECTOR_WIDTH) * TILE_X_STRIDE;
+ unsigned iy = (y / TILE_VECTOR_HEIGHT) * TILE_Y_STRIDE;
+ unsigned offset = iy + ix + c * TILE_C_STRIDE +
+ tile_offset[y % TILE_VECTOR_HEIGHT][x % TILE_VECTOR_WIDTH];
+ return offset;
+}
+
+
+#define TILE_PIXEL(_p, _x, _y, _c) ((_p)[tile_pixel_offset(_x, _y, _c)])