From: kramm <kramm>
Date: Sat, 16 Feb 2002 17:44:54 +0000 (+0000)
Subject: Added sprite folding
X-Git-Tag: release-0-2-3~17
X-Git-Url: http://git.asbjorn.it/?a=commitdiff_plain;h=fcb4a9475268e19036bca32bec316d3d5402dc9a;p=swftools.git

Added sprite folding
---

diff --git a/lib/rfxswf.c b/lib/rfxswf.c
index f560f95..9a568fd 100644
--- a/lib/rfxswf.c
+++ b/lib/rfxswf.c
@@ -668,6 +668,9 @@ int swf_WriteTag(int handle,TAG * t)
 int RFXSWF_DefineSprite_GetRealSize(TAG * t)
 // Sprite Handling: Helper function to pack DefineSprite-Tag
 { U32 len = t->len;
+  if(len>4) { // folded sprite
+      return t->len;
+  }
   do
   { t = swf_NextTag(t);
     if (t->id!=ST_DEFINESPRITE) len += RFXSWF_WriteTag(-1,t);
@@ -676,6 +679,67 @@ int RFXSWF_DefineSprite_GetRealSize(TAG * t)
   return len;
 }
 
+void swf_FoldSprite(TAG * t)
+{
+  TAG*sprtag=t,*tmp;
+  U16 id,frames,tmpid;
+  if(t->id!=ST_DEFINESPRITE)
+      return;
+  if(!t->len) {
+      fprintf(stderr, "Error: Sprite has no ID!");
+      return;
+  }
+
+  t->pos = 0;
+  id = swf_GetU16(t);
+  //frames = swf_GetU16(t);
+  free(t->data);
+  t->len = t->pos = t->memsize = 0;
+  t->data = 0;
+
+  frames = 0;
+
+  do 
+  { 
+    if(t->id==ST_SHOWFRAME) frames++;
+    t = swf_NextTag(t);
+  } while(t&&t!=ST_END);
+
+  t = swf_NextTag(sprtag);
+  swf_SetU16(sprtag, id);
+  swf_SetU16(sprtag, frames);
+
+  do
+  { 
+    tmpid= t->id;
+    if(t->len<0x3f) {
+	swf_SetU16(sprtag,t->len|(t->id<<6));
+    } else {
+	swf_SetU16(sprtag,0x3f|(t->id<<6));
+	swf_SetU32(sprtag,t->len);
+    }
+    if(t->len)
+	swf_SetBlock(sprtag,t->data, t->len);
+    tmp = t;
+    t = swf_NextTag(t);
+    swf_DeleteTag(tmp);
+  } 
+  while (t&&(tmpid!=ST_END));
+
+//  sprtag->next = t;
+//  t->prev = sprtag;
+}
+
+void swf_FoldAll(SWF*swf)
+{
+    TAG*tag = swf->firstTag;
+    while(tag) {
+	if(tag->id == ST_DEFINESPRITE)
+	    swf_FoldSprite(tag);
+	tag = swf_NextTag(tag);
+    }
+}
+
 #define swf_ReadTag(a,b)  RFXSWF_ReadTag(a,b)
 #define swf_WriteTag(a,b)  RFXSWF_WriteTag(a,b)
 
diff --git a/lib/rfxswf.h b/lib/rfxswf.h
index 4ad76cb..9b775f9 100644
--- a/lib/rfxswf.h
+++ b/lib/rfxswf.h
@@ -154,6 +154,11 @@ void swf_FreeTags(SWF * swf);               // Frees all malloc'ed memory for sw
 // for streaming:
 int  swf_WriteHeader(int handle,SWF * swf);    // Writes Header of swf to file
 int  swf_WriteTag(int handle,TAG * tag);    // Writes TAG to file
+
+// folding/unfolding:
+
+void swf_FoldAll(SWF*swf);
+void swf_FoldSprite(TAG*tag);
     
 TAG * swf_InsertTag(TAG * after,U16 id);    // updates frames, if necessary
 int   swf_DeleteTag(TAG * t);