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 B�hme <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
isUnitMatrix(MATRIX * m)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
isUnitCXForm(CXFORM * cx)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
objectplace(TAG * t,U16 id,U16 depth,MATRIX * m,CXFORM * cx,const char * name,U16 clipaction,U8 blendmode,FILTERLIST * filters)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 }
swf_ObjectPlace(TAG * t,U16 id,U16 depth,MATRIX * m,CXFORM * cx,const char * name)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 }
swf_ObjectPlaceClip(TAG * t,U16 id,U16 depth,MATRIX * m,CXFORM * cx,const char * name,U16 clipaction)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 }
swf_ObjectPlaceBlend(TAG * t,U16 id,U16 depth,MATRIX * m,CXFORM * cx,const char * name,U8 blend)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 }
swf_ObjectMove(TAG * t,U16 depth,MATRIX * m,CXFORM * cx)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
swf_SetPlaceObject(TAG * t,SWFPLACEOBJECT * obj)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
swf_GetPlaceObject(TAG * tag,SWFPLACEOBJECT * obj)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->flags = flags;
184 obj->depth = swf_GetU16(tag);
185 //obj->internal = flags;
186 if(flags&PF_MOVE) obj->move = 1;
187 if(flags&PF_CHAR) obj->id = swf_GetU16(tag);
188 if(flags&PF_MATRIX) swf_GetMatrix(tag, &obj->matrix);
189 if(flags&PF_CXFORM) swf_GetCXForm(tag, &obj->cxform,1);
190 if(flags&PF_RATIO) obj->ratio = swf_GetU16(tag);
191 /* if you modify the order of these operations, also
192 modify it in ../src/swfcombine.c */
193 if(flags&PF_CLIPDEPTH)
194 obj->clipdepth = swf_GetU16(tag); //clip
195 if(flags&PF_NAME) {
196 int l,t;
197 U8*data;
198 swf_ResetReadBits(tag);
199 l = strlen((const char *)&tag->data[tag->pos]);
200 t = 0;
201 data = (U8*)rfx_alloc(l+1);
202 obj->name = (char*)data;
203 while((data[t++] = swf_GetU8(tag)));
204 }
205 if(flags2&PF2_BLENDMODE) {
206 obj->blendmode = swf_GetU8(tag);
207 }
208
209 /* Actionscript ignored (for now) */
210 obj->actions = 0;
211 } else {
212 fprintf(stderr, "rfxswf: Bad Tag: %d not a placeobject\n", tag->id);
213 }
214 }
215
swf_PlaceObjectFree(SWFPLACEOBJECT * obj)216 void swf_PlaceObjectFree(SWFPLACEOBJECT* obj)
217 {
218 if(obj->name)
219 rfx_free(obj->name);
220 }
221
222