fixed RLEsprite bug

[eradicate] / src / sprite.c

diff --git a/src/sprite.c b/src/sprite.c
index 067c41c..7426cb0 100644 (file)
--- a/src/sprite.c
+++ b/src/sprite.c
@@ -2,10 +2,15 @@
 #include <stdlib.h>
 #include <string.h>
 #include <errno.h>
+#include <assert.h>
 #include "inttypes.h"
 #include "sprite.h"
 #include "util.h"
 
+
+#define SOP_OP(op)     ((op) & 0xff)
+#define SOP_LEN(op)    ((op) >> 16)
+
 #pragma pack (push, 1)
 struct file_header {
        char magic[8];
@@ -134,3 +139,32 @@ err:
        free(spr->ops);
        return -1;
 }
+
+void draw_sprite(void *dest, int fbpitch, struct sprites *ss, int idx)
+{
+       struct sprite_op *sop = ss->sprites[idx].ops;
+       unsigned char *fbptr = dest;
+       int xoffs = 0;
+
+       for(;;) {
+               assert((xoffs & 1) == 0);
+               switch(sop->op) {
+               case SOP_END:
+                       return;
+               case SOP_ENDL:
+                       fbptr += fbpitch;
+                       xoffs = 0;
+                       break;
+               case SOP_SKIP:
+                       xoffs += sop->size;
+                       break;
+               case SOP_COPY:
+                       memcpy(fbptr + xoffs, sop->data, sop->size);
+                       xoffs += sop->size;
+                       break;
+               default:
+                       break;
+               }
+               sop++;
+       }
+}