dump out a warning if there's an overflow during matrix multiplication

[swftools.git] / lib / modules / swftools.c

diff --git a/lib/modules/swftools.c b/lib/modules/swftools.c
index 94c440f..37c8e8b 100644 (file)
--- a/lib/modules/swftools.c
+++ b/lib/modules/swftools.c
@@ -26,8 +26,11 @@
 #define S64 long long
 SFIXED RFXSWF_SP(SFIXED a1,SFIXED a2,SFIXED b1,SFIXED b2)
 { S64 a;
-  a = (S64)a1*(S64)b1+(S64)a2*(S64)b2;
-  return (SFIXED)(a>>16);
+  a = ((S64)a1*(S64)b1+(S64)a2*(S64)b2)>>16;
+  SFIXED result = (SFIXED)(a);
+  if(a!=result) 
+      fprintf(stderr, "Warning: overflow in matrix multiplication");
+  return result;
 }
 SFIXED RFXSWF_QFIX(int zaehler,int nenner) // bildet Quotient von zwei INTs in SFIXED
 { S64 z = zaehler<<16;
@@ -42,13 +45,14 @@ MATRIX * swf_MatrixJoin(MATRIX * d,MATRIX * s1,MATRIX * s2)
   if (!s1) return (s2)?(MATRIX *)memcpy(d,s2,sizeof(MATRIX)):NULL;
   if (!s2) return (MATRIX *)memcpy(d,s1,sizeof(MATRIX));
   
-  d->tx = s1->tx + s2->tx;
-  d->ty = s1->ty + s2->ty;
+  d->tx = s1->tx + RFXSWF_SP(s1->sx,s1->r1,s2->tx,s2->ty);
+  d->ty = s1->ty + RFXSWF_SP(s1->r0,s1->sy,s2->tx,s2->ty);
   
   d->sx = RFXSWF_SP(s1->sx,s1->r1,s2->sx,s2->r0);
-  d->sy = RFXSWF_SP(s1->r0,s1->sy,s2->r1,s2->sy);
   d->r0 = RFXSWF_SP(s1->r0,s1->sy,s2->sx,s2->r0);
+
   d->r1 = RFXSWF_SP(s1->sx,s1->r1,s2->r1,s2->sy);
+  d->sy = RFXSWF_SP(s1->r0,s1->sy,s2->r1,s2->sy);
 
   //DumpMatrix(NULL,d);
   
@@ -136,6 +140,7 @@ SRECT swf_GetDefineBBox(TAG * t)
   U32 oldTagPos;
   U16 id = 0;
   SRECT b1,b2;
+  memset(&b1, 0, sizeof(b1));
 
   oldTagPos = swf_GetTagPos(t);
   swf_SetTagPos(t,0);
@@ -408,7 +413,7 @@ void swf_GetMorphGradient(TAG * tag, GRADIENT * gradient1, GRADIENT * gradient2)
 
 #define DEBUG_ENUMERATE if(0)
 
-static void enumerateUsedIDs_styles(TAG * tag, void (*callback)(TAG*, int, void*), void*callback_data, int num, int morph)
+void enumerateUsedIDs_styles(TAG * tag, void (*callback)(TAG*, int, void*), void*callback_data, int num, int morph)
 {
     U16 count;
     int t;
@@ -851,7 +856,8 @@ void swf_Relocate (SWF*swf, char*bitmap)
            for(t=0;t<num;t++) {
                int id = GET16(&tag->data[ptr[t]]);
                if(slaveids[id]<0) {
-                   fprintf(stderr, "swf_Relocate: Mapping id never encountered before: %d\n", id);
+                   fprintf(stderr, "swf_Relocate: Mapping id (%d) never encountered before in %s\n", id,
+                           swf_TagGetName(tag));
                    return ;
                }
                id = slaveids[id];
@@ -902,6 +908,30 @@ U8 swf_isShapeTag(TAG*tag)
     return 0;
 }
 
+U8 swf_isPlaceTag(TAG*tag)
+{
+    if(tag->id == ST_PLACEOBJECT ||
+       tag->id == ST_PLACEOBJECT2)
+        return 1;
+    return 0;
+}
+U8 swf_isTextTag(TAG*tag)
+{
+    if(tag->id == ST_DEFINETEXT ||
+       tag->id == ST_DEFINETEXT2)
+        return 1;
+    return 0;
+}
+
+U8 swf_isFontTag(TAG*tag)
+{
+    if(tag->id == ST_DEFINEFONT ||
+       tag->id == ST_DEFINEFONT2 ||
+       tag->id == ST_DEFINEFONTINFO)
+        return 1;
+    return 0;
+}
+
 U8  swf_isImageTag(TAG*tag)
 {
     if(tag->id == ST_DEFINEBITSJPEG || 
@@ -966,7 +996,7 @@ static int tagHash(TAG*tag)
         a >>= 8;
         a += tag->data[t]*0xefbc35a5*b*(t+1);
     }
-    return a&0x7fffffff; //always return unsigned
+    return a&0x7fffffff; //always return positive number
 }
 
 void swf_Optimize(SWF*swf)
@@ -991,8 +1021,9 @@ void swf_Optimize(SWF*swf)
            FIXME: a better way would be to compare
                   the helper tags, too.
          */
-        if(swf_isPseudoDefiningTag(tag)) {
-            //dontremap[swf_GetDefineID(tag)] = 1; //FIXME
+        if(swf_isPseudoDefiningTag(tag) &&
+           tag->id != ST_NAMECHARACTER) {
+            dontremap[swf_GetDefineID(tag)] = 1;
         }
         tag=tag->next;
     }
@@ -1001,7 +1032,22 @@ void swf_Optimize(SWF*swf)
         int doremap=1;
         
         TAG*next = tag->next;
-        
+
+        /* remap the tag */
+        int num = swf_GetNumUsedIDs(tag);
+        int*positions = rfx_alloc(sizeof(int)*num);
+        int t;
+        swf_GetUsedIDs(tag, positions);
+        for(t=0;t<num;t++) {
+            int id = GET16(&tag->data[positions[t]]);
+            id = remap[id];
+            PUT16(&tag->data[positions[t]], id);
+        }
+        rfx_free(positions);
+        tag = tag->next;
+
+        /* now look for previous tags with the same
+           content */
         if(swf_isDefiningTag(tag)) {
             TAG*tag2;
             int id = swf_GetDefineID(tag);
@@ -1050,21 +1096,6 @@ void swf_Optimize(SWF*swf)
             }
         }
 
-        if(doremap)
-        {
-            int num = swf_GetNumUsedIDs(tag);
-            int*positions = rfx_alloc(sizeof(int)*num);
-            int t;
-            swf_GetUsedIDs(tag, positions);
-            for(t=0;t<num;t++) {
-                int id = GET16(&tag->data[positions[t]]);
-                id = remap[id];
-                PUT16(&tag->data[positions[t]], id);
-            }
-            rfx_free(positions);
-            tag = tag->next;
-        }
-
         tag = next;
     }
     rfx_free(dontremap);
@@ -1072,3 +1103,60 @@ void swf_Optimize(SWF*swf)
     rfx_free(id2tag);
     rfx_free(hashmap);
 }
+
+void swf_SetDefineBBox(TAG * tag, SRECT newbbox)
+{
+    U16 id = 0;
+    SRECT b1;
+    swf_SetTagPos(tag,0);
+
+    switch (swf_GetTagID(tag))
+    { 
+       case ST_DEFINESHAPE:
+       case ST_DEFINESHAPE2:
+       case ST_DEFINESHAPE3:
+       case ST_DEFINEEDITTEXT:
+       case ST_DEFINETEXT:
+       case ST_DEFINETEXT2:
+       case ST_DEFINEVIDEOSTREAM: {
+             U32 after_bbox_offset = 0, len;
+             U8*data;
+             id = swf_GetU16(tag);
+             swf_GetRect(tag, &b1);
+             swf_ResetReadBits(tag);
+             after_bbox_offset = tag->pos;
+             len = tag->len - after_bbox_offset;
+             data = malloc(len);
+             memcpy(data, &tag->data[after_bbox_offset], len);
+             tag->writeBit = 0;
+             tag->len = 2;
+             swf_SetRect(tag, &newbbox);
+             swf_SetBlock(tag, data, len);
+             free(data);
+             tag->pos = tag->readBit = 0;
+
+       } break;
+       default:
+           fprintf(stderr, "rfxswf: Tag %d (%s) has no bbox\n", tag->id, swf_TagGetName(tag));
+    }
+}
+
+RGBA swf_GetSWFBackgroundColor(SWF*swf)
+{
+    TAG*t=swf->firstTag;
+    RGBA color;
+    color.r = color.b = color.g = 0;
+    color.a = 255;
+    while(t) {
+       if(t->id == ST_SETBACKGROUNDCOLOR) {
+           swf_SetTagPos(t, 0);
+           color.r = swf_GetU8(t);
+           color.g = swf_GetU8(t);
+           color.b = swf_GetU8(t);
+           break;
+       }
+       t=t->next;
+    }
+    return color;
+}
+