reworked compression handling logic

[swftools.git] / lib / rfxswf.c

diff --git a/lib/rfxswf.c b/lib/rfxswf.c
index 684c002..3de0374 100644 (file)
--- a/lib/rfxswf.c
+++ b/lib/rfxswf.c
@@ -1254,6 +1254,7 @@ int swf_ReadSWF2(reader_t*reader, SWF * swf)   // Reads SWF to memory (malloc'ed
        reader_init_zlibinflate(&zreader, reader);
        reader = &zreader;
     }
+    swf->compressed = 0; // derive from version number from now on
 
     reader_GetRect(reader, &swf->movieSize);
     reader->read(reader, &swf->frameRate, 2);
@@ -1382,11 +1383,10 @@ int  swf_WriteSWF2(writer_t*writer, SWF * swf)     // Writes SWF to file, return
        It also means that we don't initialize our own zlib
        writer, but assume the caller provided one.
      */
-      if(swf->compressed) {
+      if(swf->compressed==1 || (swf->compressed==0 && swf->fileVersion>=6)) {
        char*id = "CWS";
        writer->write(writer, id, 3);
-      }
-      else {
+      } else {
        char*id = "FWS";
        writer->write(writer, id, 3);
       }
@@ -1395,7 +1395,7 @@ int  swf_WriteSWF2(writer_t*writer, SWF * swf)     // Writes SWF to file, return
       PUT32(b4, swf->fileSize);
       writer->write(writer, b4, 4);
       
-      if(swf->compressed) {
+      if(swf->compressed==1 || (swf->compressed==0 && swf->fileVersion>=6)) {
        writer_init_zlibdeflate(&zwriter, writer);
        writer = &zwriter;
       }
@@ -1421,7 +1421,7 @@ int  swf_WriteSWF2(writer_t*writer, SWF * swf)     // Writes SWF to file, return
     { if (swf_WriteTag2(writer, t)<0) return -1;
       t = swf_NextTag(t);
     }
-    if(swf->compressed) {
+    if(swf->compressed==1 || (swf->compressed==0 && swf->fileVersion>=6) || swf->compressed==8) {
       if(swf->compressed != 8) {
        zwriter.finish(&zwriter);
        return writer->pos - writer_lastpos;
@@ -1437,7 +1437,6 @@ int  swf_WriteSWF(int handle, SWF * swf)     // Writes SWF to file, returns leng
 {
   writer_t writer;
   int len = 0;
-  swf->compressed = 0;
   
   if(handle<0) {
     writer_init_nullwriter(&writer);
@@ -1450,22 +1449,6 @@ int  swf_WriteSWF(int handle, SWF * swf)     // Writes SWF to file, returns leng
   return len;
 }
 
-int  swf_WriteSWC(int handle, SWF * swf)     // Writes SWF to file, returns length or <0 if fails
-{
-  writer_t writer;
-  int len = 0;
-  swf->compressed = 1;
-
-  if(handle<0) {
-    writer_init_nullwriter(&writer);
-    len = swf_WriteSWF2(&writer, swf);
-  }
-  writer_init_filewriter(&writer, handle);
-  len = swf_WriteSWF2(&writer, swf);
-  writer.finish(&writer);
-  return len;
-}
-
 int swf_WriteHeader2(writer_t*writer,SWF * swf)
 {
   SWF myswf;