1 files changed, 7 insertions, 1 deletions
diff --git a/src/px.h b/src/px.h
index 3d0db03..2d8f39b 100644
--- a/src/px.h
+++ b/src/px.h
@@ -13,6 +13,10 @@
 typedef uint8_t PxCol;
 
 typedef struct {
+	uint8_t a[3];
+} PxRawCol;
+
+typedef struct {
 	uint8_t r, g, b;
 	bool t; /* tranparency */
 	int pal, spal;
@@ -62,7 +66,7 @@ void pxDeinit(void);
 
 /* Return -1 on error.
  * Should be called between TZR_DrawBegin and TZR_DrawEnd. */
-int pxFlip(void);
+int pxFlip(PxRawCol (*fs)(PxRawCol c, int x, int y));
 
 /*** DRAW ***/
 /* Fill and reset Z on the clipping region with color 'c'. */
@@ -116,6 +120,8 @@ void _pxPalt(const PxPaltArgs *args);
 /* Try to find a color in palette, return 255 on error. */
 PxCol pxCol(uint8_t r, uint8_t g, uint8_t b);
 
+PxRawCol pxRawCol(PxCol c);
+
 /*** MATH ***/
 int pxMin(int a, int b);
 int pxMax(int a, int b);