3 Object place and move routines
5 Extension module for the rfxswf library.
6 Part of the swftools package.
8 Copyright (c) 2001 Rainer Böhme <rfxswf@reflex-studio.de>
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.
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.
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 */
26 #define PF_MATRIX 0x04
27 #define PF_CXFORM 0x08
30 #define PF_CLIPACTION 0x40
31 #define PF_ACTIONEVENT 0x80
33 int isUnitMatrix(MATRIX* m)
35 /* a matrix with all zeros is also considered
36 "unit matrix", as a zeroed out MATRIX structure
37 usually means that the caller doesn't want to
39 if(( (m->sx == 0x10000 && m->sy == 0x10000)
40 || (m->sx == 0 && m->sy == 0))
41 && ((m->r0|m->r1|m->tx|m->ty) == 0)
47 int isUnitCXForm(CXFORM* cx)
49 if((cx->a0==256 && cx->r0==256 && cx->g0==256 && cx->b0==256) &&
50 (cx->a1==0 && cx->r1==0 && cx->g1==0 && cx->b1==0))
52 /* A CXForm of all zeros is, unfortunately, not as unlikely
53 as a matrix of all zeros. However, we still treat it
54 as non-existent/uniform transform */
55 if((cx->a0==0 && cx->r0==0 && cx->g0==0 && cx->b0==0) &&
56 (cx->a1==0 && cx->r1==0 && cx->g1==0 && cx->b1==0))
61 int swf_ObjectPlace(TAG * t,U16 id,U16 depth,MATRIX * m,CXFORM * cx,U8 * name)
65 if(cx && cx->r1==0 && cx->g1==0 && cx->b1==0 && cx->a1==0
66 && cx->r0==256 && cx->g0==256 && cx->b0==256 && cx->a0==256)
69 if(m && isUnitMatrix(m))
72 flags = (id?PF_CHAR:0)|(m?PF_MATRIX:0)|(cx?PF_CXFORM:0)|(name?PF_NAME:0)|((m||cx)&&(!id)?PF_MOVE:0);
76 if (flags&PF_CHAR) swf_SetU16(t,id);
77 if (flags&PF_MATRIX) swf_SetMatrix(t,m);
78 if (flags&PF_CXFORM) swf_SetCXForm(t,cx,1);
79 if (flags&PF_RATIO) swf_SetU16(t,0);
80 if (flags&PF_NAME) swf_SetString(t,name);
85 int swf_ObjectPlaceClip(TAG * t,U16 id,U16 depth,MATRIX * m,CXFORM * cx,U8 * name, U16 clipaction)
89 if(cx && cx->r1==0 && cx->g1==0 && cx->b1==0 && cx->a1==0
90 && cx->r0==256 && cx->g0==256 && cx->b0==256 && cx->a0==256)
93 if(m && isUnitMatrix(m))
96 flags = (id?PF_CHAR:0)|(m?PF_MATRIX:0)|(cx?PF_CXFORM:0)|(name?PF_NAME:0)|
97 ((m||cx)&&(!id)?PF_MOVE:0)|(clipaction?PF_CLIPACTION:0);
101 if (flags&PF_CHAR) swf_SetU16(t,id);
102 if (flags&PF_MATRIX) swf_SetMatrix(t,m);
103 if (flags&PF_CXFORM) swf_SetCXForm(t,cx,1);
104 if (flags&PF_RATIO) swf_SetU16(t,0);
106 /* ??? The spec states that name comes first? */
107 if (flags&PF_CLIPACTION) swf_SetU16(t, clipaction);
108 if (flags&PF_NAME) swf_SetString(t,name);
112 int swf_ObjectMove(TAG * t,U16 depth,MATRIX * m,CXFORM * cx)
113 { return swf_ObjectPlace(t,0,depth,m,cx,NULL);
116 void swf_SetPlaceObject(TAG * t,SWFPLACEOBJECT* obj)
120 if(t->id == ST_PLACEOBJECT) {
121 swf_SetU16(t, obj->id);
122 swf_SetU16(t, obj->depth);
123 swf_SetMatrix(t, &obj->matrix);
124 swf_SetCXForm(t, &obj->cxform, 0);
126 int m = !isUnitMatrix(&obj->matrix);
127 int cx = !isUnitCXForm(&obj->cxform);
129 flags = (obj->id?PF_CHAR:0)|(m?PF_MATRIX:0)|(cx?PF_CXFORM:0)|(obj->ratio?PF_RATIO:0)|
130 (obj->name?PF_NAME:0)|(obj->move?PF_MOVE:0)|
131 (obj->clipdepth?PF_CLIPACTION:0);
134 swf_SetU16(t,obj->depth);
135 if (flags&PF_CHAR) swf_SetU16(t,obj->id);
136 if (flags&PF_MATRIX) swf_SetMatrix(t,&obj->matrix);
137 if (flags&PF_CXFORM) swf_SetCXForm(t,&obj->cxform,1);
138 if (flags&PF_RATIO) swf_SetU16(t,obj->ratio);
140 /* ??? The spec states that name comes first? */
141 if (flags&PF_CLIPACTION) swf_SetU16(t,obj->clipdepth);
142 if (flags&PF_NAME) swf_SetString(t,obj->name);
143 if (flags&PF_ACTIONEVENT) {
149 void swf_GetPlaceObject(TAG * tag,SWFPLACEOBJECT* obj)
153 memset(obj, 0, sizeof(SWFPLACEOBJECT));
154 swf_GetMatrix(0, &obj->matrix);
155 swf_GetCXForm(0, &obj->cxform, 1);
156 //obj->internal = PF_CHAR|PF_MATRIX|PF_CXFORM;
159 swf_SetTagPos(tag, 0);
161 if(tag->id == ST_PLACEOBJECT) {
162 obj->id = swf_GetU16(tag);
163 obj->depth = swf_GetU16(tag);
164 swf_GetMatrix(tag, &obj->matrix);
165 swf_GetCXForm(tag, &obj->cxform, 0);
166 //obj->internal = PF_CHAR|PF_MATRIX|PF_CXFORM;
167 } else if(tag->id == ST_PLACEOBJECT2) {
168 flags = swf_GetU8(tag);
169 memset(obj,0,sizeof(SWFPLACEOBJECT));
171 swf_GetMatrix(0,&obj->matrix);
172 swf_GetCXForm(0,&obj->cxform,1);
174 obj->depth = swf_GetU16(tag);
175 //obj->internal = flags;
177 if(flags&2) obj->id = swf_GetU16(tag);
178 if(flags&4) swf_GetMatrix(tag, &obj->matrix);
179 if(flags&8) swf_GetCXForm(tag, &obj->cxform,1);
180 if(flags&16) obj->ratio = swf_GetU16(tag);
181 /* if you modify the order of these operations, also
182 modify it in ../src/swfcombine.c */
184 obj->clipdepth = swf_GetU16(tag); //clip
188 swf_ResetReadBits(tag);
189 l = strlen(&tag->data[tag->pos]);
191 data = rfx_alloc(l+1);
193 while((data[t++] = swf_GetU8(tag)));
196 /* Actionscript ignored (for now) */
199 fprintf(stderr, "rfxswf: Bad Tag: %d not a placeobject\n", tag->id);
203 void swf_PlaceObjectFree(SWFPLACEOBJECT* obj)