From: kramm <kramm>
Date: Tue, 14 Jan 2003 23:11:06 +0000 (+0000)
Subject: new function swf_OptimizeTagOrder.
X-Git-Tag: release-0-4-4~159
X-Git-Url: http://git.asbjorn.biz/?p=swftools.git;a=commitdiff_plain;h=79d1c8f25ee9082844d8a85d50e2c1e4127e2480

new function swf_OptimizeTagOrder.
---

diff --git a/lib/rfxswf.c b/lib/rfxswf.c
index 7824dee..28891e4 100644
--- a/lib/rfxswf.c
+++ b/lib/rfxswf.c
@@ -865,6 +865,56 @@ void swf_UnFoldAll(SWF*swf)
     }
 }
 
+void swf_OptimizeTagOrder(SWF*swf)
+{
+  TAG*tag,*next;
+  TAG*level0;
+  int level;
+  int changes;
+  swf_UnFoldAll(swf);
+  /* at the moment, we don't actually do optimizing,
+     only fixing of non-spec-conformant things like
+     sprite tags */
+
+  do {
+    changes = 0;
+    level = 0;
+    level0 = 0;
+    tag = swf->firstTag;
+    while(tag) {
+      next = tag->next;
+      if(tag->id == ST_DEFINESPRITE) {
+	level++;
+	if(level==1) {
+	  level0 = tag;
+	  tag = next;
+	  continue;
+	}
+      }
+      if(level>=1) {
+	/* move non-sprite tags out of sprite */
+	if(!swf_isAllowedSpriteTag(tag) || level>=2) {
+	  /* remove tag from current position */
+	  tag->prev->next = tag->next;
+	  tag->next->prev = tag->prev;
+
+	  /* insert before tag level0 */
+	  tag->next = level0;
+	  tag->prev = level0->prev;
+	  level0->prev = tag;
+	  tag->prev->next = tag;
+	  changes = 1;
+	}
+      }
+      if(tag->id == ST_END) {
+	level--;
+      }
+
+      tag = next;
+    }
+  } while(changes);
+}
+
 // Movie Functions
 
 int swf_ReadSWF2(struct reader_t*reader, SWF * swf)   // Reads SWF to memory (malloc'ed), returns length or <0 if fails
diff --git a/lib/rfxswf.h b/lib/rfxswf.h
index db66176..01059d4 100644
--- a/lib/rfxswf.h
+++ b/lib/rfxswf.h
@@ -178,6 +178,10 @@ void swf_UnFoldAll(SWF*swf);
 void swf_FoldSprite(TAG*tag);
 void swf_UnFoldSprite(TAG*tag);
 
+// tag reordering:
+
+void swf_OptimizeTagOrder(SWF*swf);
+
 // basic routines:
     
 TAG * swf_InsertTag(TAG * after,U16 id);    // updates frames, if necessary