fixed masked image bug
[swftools.git] / lib / modules / swfobject.c
1 /* swfobject.c
2
3    Object place and move routines
4       
5    Extension module for the rfxswf library.
6    Part of the swftools package.
7
8    Copyright (c) 2001 Rainer Böhme <rfxswf@reflex-studio.de>
9  
10    This program is free software; you can redistribute it and/or modify
11    it under the terms of the GNU General Public License as published by
12    the Free Software Foundation; either version 2 of the License, or
13    (at your option) any later version.
14
15    This program is distributed in the hope that it will be useful,
16    but WITHOUT ANY WARRANTY; without even the implied warranty of
17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18    GNU General Public License for more details.
19
20    You should have received a copy of the GNU General Public License
21    along with this program; if not, write to the Free Software
22    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */
23
24 #include "../rfxswf.h"
25
26
27 char*blendModeNames[] = {"normal","normal2","layer","multiply",
28                        "screen","lighten", "darken","add",
29                        "substract","difference","invert","alpha",
30                        "erase","overlay","hardlight",0};
31
32 int isUnitMatrix(MATRIX* m)
33 {
34     /* a matrix with all zeros is also considered
35        "unit matrix", as a zeroed out MATRIX structure
36        usually means that the caller doesn't want to
37        set the matrix */
38     if((   (m->sx == 0x10000 && m->sy == 0x10000) 
39         || (m->sx == 0 && m->sy == 0))
40                 && ((m->r0|m->r1|m->tx|m->ty) == 0)
41       )
42         return 1;
43     return 0;
44 }
45
46 int isUnitCXForm(CXFORM* cx)
47 {
48     if((cx->a0==256 && cx->r0==256 && cx->g0==256 && cx->b0==256) &&
49        (cx->a1==0 && cx->r1==0 && cx->g1==0 && cx->b1==0))
50         return 1;
51     /* A CXForm of all zeros is, unfortunately, not as unlikely
52        as a matrix of all zeros. However, we still treat it
53        as non-existent/uniform transform */
54     if((cx->a0==0 && cx->r0==0 && cx->g0==0 && cx->b0==0) &&
55        (cx->a1==0 && cx->r1==0 && cx->g1==0 && cx->b1==0))
56         return 1;
57     return 0;
58 }
59
60 static int objectplace(TAG * t,U16 id,U16 depth,MATRIX * m,CXFORM * cx,const char * name, U16 clipaction, U8 blendmode, FILTERLIST*filters)
61 { U8 flags,flags2;
62   if (!t) return -1;
63
64   if(cx && id && cx->r1==0 && cx->g1==0 && cx->b1==0 && cx->a1==0
65               && cx->r0==256 && cx->g0==256 && cx->b0==256 && cx->a0==256)
66       cx = 0;
67
68   if(m && id && isUnitMatrix(m)) 
69       m = 0;
70
71   flags = (id?PF_CHAR:0)|(m?PF_MATRIX:0)|(cx?PF_CXFORM:0)|(name?PF_NAME:0)|((m||cx)&&(!id)?PF_MOVE:0)|(clipaction?PF_CLIPDEPTH:0);
72   flags2 = (0?PF2_ASBITMAP:0)|(blendmode?PF2_BLENDMODE:0)|(filters?PF2_FILTERS:0);
73
74   swf_SetU8(t,flags);
75   if(t->id == ST_PLACEOBJECT3)
76       swf_SetU8(t, flags2);
77   swf_SetU16(t,depth);
78   if (flags&PF_CHAR) swf_SetU16(t,id);
79   if (flags&PF_MATRIX) swf_SetMatrix(t,m);
80   if (flags&PF_CXFORM) swf_SetCXForm(t,cx,1);
81   if (flags&PF_RATIO) swf_SetU16(t,0);
82   /* ??? The spec states that name comes first? */
83   if (flags&PF_CLIPDEPTH) swf_SetU16(t, clipaction);
84   if (flags&PF_NAME) swf_SetString(t,name);
85         
86   if (flags2&PF2_BLENDMODE)
87     swf_SetU8(t,blendmode);
88   return 0; 
89 }
90 int swf_ObjectPlace(TAG * t,U16 id,U16 depth,MATRIX * m,CXFORM * cx,const char * name)
91 {
92     return objectplace(t,id,depth,m,cx,name,0,0,0);
93 }
94 int swf_ObjectPlaceClip(TAG * t,U16 id,U16 depth,MATRIX * m,CXFORM * cx,const char * name, U16 clipaction)
95
96     return objectplace(t,id,depth,m,cx,name,clipaction,0,0);
97 }
98 int swf_ObjectPlaceBlend(TAG * t,U16 id,U16 depth,MATRIX * m,CXFORM * cx,const char * name, U8 blend)
99
100     if(t->id != ST_PLACEOBJECT3)
101         fprintf(stderr, "wrong tag- ignoring blend mode\n");
102     return objectplace(t,id,depth,m,cx,name,0,blend,0);
103 }
104 int swf_ObjectMove(TAG * t,U16 depth,MATRIX * m,CXFORM * cx)
105 {
106     return objectplace(t,0,depth,m,cx,0,0,0,0);
107 }
108
109 void swf_SetPlaceObject(TAG * t,SWFPLACEOBJECT* obj)
110
111     if (!t) return ;
112     if(t->id == ST_PLACEOBJECT) {
113         swf_SetU16(t, obj->id);
114         swf_SetU16(t, obj->depth);      
115         swf_SetMatrix(t, &obj->matrix);
116         swf_SetCXForm(t, &obj->cxform, 0);
117     } else {
118         U8 flags,flags2;
119         int m = !isUnitMatrix(&obj->matrix);
120         int cx = !isUnitCXForm(&obj->cxform);
121
122         flags = (obj->id?PF_CHAR:0)|(m?PF_MATRIX:0)|(cx?PF_CXFORM:0)|(obj->ratio?PF_RATIO:0)|
123                 (obj->name?PF_NAME:0)|(obj->move?PF_MOVE:0)|
124                 (obj->clipdepth?PF_CLIPDEPTH:0);
125         flags2 = (0?PF2_ASBITMAP:0)|(obj->blendmode?PF2_BLENDMODE:0)|(obj->filters?PF2_FILTERS:0);
126
127         swf_SetU8(t,flags);
128         if(t->id == ST_PLACEOBJECT3) 
129             swf_SetU8(t,flags2);
130         swf_SetU16(t,obj->depth);
131         if (flags&PF_CHAR) swf_SetU16(t,obj->id);
132         if (flags&PF_MATRIX) swf_SetMatrix(t,&obj->matrix);
133         if (flags&PF_CXFORM) swf_SetCXForm(t,&obj->cxform,1);
134         if (flags&PF_RATIO) swf_SetU16(t,obj->ratio);
135   
136         /* ??? The spec states that name comes first? */
137         if (flags&PF_CLIPDEPTH) swf_SetU16(t,obj->clipdepth);
138         if (flags&PF_NAME) swf_SetString(t,obj->name);
139
140         if (flags2&PF2_FILTERS) {
141             swf_SetU8(t,obj->filters->num);
142             int s;
143             for(s=0;s<obj->filters->num;s++)
144                 swf_SetFilter(t,obj->filters->filter[s]);
145         }
146         if (flags2&PF2_BLENDMODE)
147             swf_SetU8(t,obj->blendmode);
148         if (flags&PF_ACTIONEVENT) {
149             // ...
150         }
151     }
152 }
153
154 void swf_GetPlaceObject(TAG * tag,SWFPLACEOBJECT* obj)
155 {
156     if(obj)
157         memset(obj, 0, sizeof(SWFPLACEOBJECT));
158
159     if(!tag) {
160         swf_GetMatrix(0, &obj->matrix);
161         swf_GetCXForm(0, &obj->cxform, 1);
162         //obj->internal = PF_CHAR|PF_MATRIX|PF_CXFORM;
163         return;
164     }
165     swf_SetTagPos(tag, 0);
166     
167     if(tag->id == ST_PLACEOBJECT) {
168         obj->id = swf_GetU16(tag);
169         obj->depth = swf_GetU16(tag);
170         swf_GetMatrix(tag, &obj->matrix);
171         swf_GetCXForm(tag, &obj->cxform, 0);
172         //obj->internal = PF_CHAR|PF_MATRIX|PF_CXFORM;
173     } else if(tag->id == ST_PLACEOBJECT2 || tag->id == ST_PLACEOBJECT3) {
174         U8 flags,flags2=0;
175         flags = swf_GetU8(tag);
176         if(tag->id == ST_PLACEOBJECT3)
177             flags2 = swf_GetU8(tag);
178         memset(obj,0,sizeof(SWFPLACEOBJECT));
179             
180         swf_GetMatrix(0,&obj->matrix);
181         swf_GetCXForm(0,&obj->cxform,1);
182
183         obj->depth = swf_GetU16(tag);
184         //obj->internal = flags;
185         if(flags&PF_MOVE) obj->move = 1;
186         if(flags&PF_CHAR) obj->id = swf_GetU16(tag);
187         if(flags&PF_MATRIX) swf_GetMatrix(tag, &obj->matrix);
188         if(flags&PF_CXFORM) swf_GetCXForm(tag, &obj->cxform,1);
189         if(flags&PF_RATIO) obj->ratio = swf_GetU16(tag);
190         /* if you modify the order of these operations, also
191            modify it in ../src/swfcombine.c */
192         if(flags&PF_CLIPDEPTH) 
193             obj->clipdepth = swf_GetU16(tag); //clip
194         if(flags&PF_NAME) {
195             int l,t;
196             U8*data;
197             swf_ResetReadBits(tag);
198             l = strlen((const char *)&tag->data[tag->pos]);
199             t = 0;
200             data = (U8*)rfx_alloc(l+1);
201             obj->name = (char*)data;
202             while((data[t++] = swf_GetU8(tag))); 
203         }
204         if(flags2&PF2_BLENDMODE) {
205             obj->blendmode = swf_GetU8(tag);
206         }
207
208         /* Actionscript ignored (for now) */
209         obj->actions = 0;
210     } else {
211         fprintf(stderr, "rfxswf: Bad Tag: %d not a placeobject\n", tag->id);
212     }
213 }
214
215 void swf_PlaceObjectFree(SWFPLACEOBJECT* obj)
216 {
217     if(obj->name)
218         rfx_free(obj->name);
219 }
220