X-Git-Url: https://jasonwoof.com/gitweb/?p=vor.git;a=blobdiff_plain;f=shape.c;h=5aa7fb763b5a1600e6ce87313ea9c4ada83e27d0;hp=9e03f19a49f395dd47eefad595fed200313783bd;hb=1f33a47c0e3b72d6050b72926643812237dc3f49;hpb=46dacbe75dac20a1c6e1b61a2eb99ca25fc971ec

diff --git a/shape.c b/shape.c
index 9e03f19..5aa7fb7 100644
--- a/shape.c
+++ b/shape.c
@@ -1,4 +1,5 @@
 #include <stdlib.h>
+#include "common.h"
 #include "shape.h"
 
 void
@@ -39,18 +40,6 @@ get_shape(SDL_Surface *img, struct shape *s)
 	SDL_UnlockSurface(img);
 }
 
-#ifndef max
-#define max(a, b) ((a) > (b) ? (a) : (b))
-#endif
-
-#ifndef min
-#define min(a, b) ((a) < (b) ? (a) : (b))
-#endif
-
-#ifndef abs
-#define abs(a) ((a)<=0 ? -(a) : (a))
-#endif
-
 int
 line_collide(int xov, struct shape *r, uint32_t *rbits, struct shape *s, uint32_t *sbits)
 {
@@ -119,3 +108,14 @@ collide(int xdiff, int ydiff, struct shape *r, struct shape *s)
 	if(xov == 0 || yov == 0) return 0;  // bboxes hit?
 	else return mask_collide(xov, yov, r, s);
 }
+
+int
+pixel_collide(unsigned int xoff, unsigned int yoff, struct shape *r)
+{
+	uint32_t pmask;
+	
+	if(xoff >= r->w || yoff >= r->h) return 0;
+
+	pmask = 1 << (xoff & 31); xoff >>= 5;
+	return r->mask[yoff*r->mw + xoff] & pmask;
+}