From e20a2581da67104e8fb26ce5c4a8e620d9c1ca75 Mon Sep 17 00:00:00 2001
From: Michael Gernoth <michael@gernoth.net>
Date: Wed, 16 Jan 2008 00:25:10 +0100
Subject: [PATCH] implement shared memory for 24bpp

---
 src/sim/g_bigmap.c | 10 ++++++++++
 src/sim/w_x.c      |  4 +---
 2 files changed, 11 insertions(+), 3 deletions(-)

diff --git a/src/sim/g_bigmap.c b/src/sim/g_bigmap.c
index 695cd88..7e99174 100644
--- a/src/sim/g_bigmap.c
+++ b/src/sim/g_bigmap.c
@@ -169,6 +169,15 @@ MemDrawBeegMapRect(SimView *view, int x, int y, int w, int h)
 #define ROW8_16(n) ROW4_16(n) ROW4_16(n+4)
 #define ROW16_16() ROW8_16(0) ROW8_16(8)
 
+#define ROW1_32(n) \
+      memcpy((char *)image, (char *)mem + (4 * 16 * (n)), 4 * 16); \
+      image = (unsigned QUAD *)(((unsigned char *)image) + lineBytes);
+
+#define ROW2_32(n) ROW1_32(n) ROW1_32(n+1)
+#define ROW4_32(n) ROW2_32(n) ROW2_32(n+2)
+#define ROW8_32(n) ROW4_32(n) ROW4_32(n+4)
+#define ROW16_32() ROW8_32(0) ROW8_32(8)
+
 	  switch (view->x->depth) {
 
 	  case 8:
@@ -182,6 +191,7 @@ MemDrawBeegMapRect(SimView *view, int x, int y, int w, int h)
 
 	  case 24:
 	  case 32:
+	    ROW16_32();
 	  default:
 	    /* XXX: handle different depths */
 	    break;
diff --git a/src/sim/w_x.c b/src/sim/w_x.c
index e32aeed..3ad6c04 100644
--- a/src/sim/w_x.c
+++ b/src/sim/w_x.c
@@ -456,9 +456,7 @@ FindXDisplay(Tk_Window tkwin)
 	} else {
 	  fprintf(stderr,
 		  "Cool, I found the shared memory extension!\n");
-	  fprintf(stderr,
-	  	  "Disabled SHM, because it is currently broken!\n");
-	  xd->shared = 0;
+	  xd->shared = 1;
 	}
       }
     }
-- 
2.39.5