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 swf_ObjectPlace(TAG * t,U16 id,U16 depth,MATRIX * m,CXFORM * cx,U8 * name)
37 if(cx && cx->r1==0 && cx->g1==0 && cx->b1==0 && cx->a1==0
38 && cx->r0==256 && cx->g0==256 && cx->b0==256 && cx->a0==256)
41 flags = (id?PF_CHAR:0)|(m?PF_MATRIX:0)|(cx?PF_CXFORM:0)|(name?PF_NAME:0)|((m||cx)&&(!id)?PF_MOVE:0);
45 if (flags&PF_CHAR) swf_SetU16(t,id);
46 if (flags&PF_MATRIX) swf_SetMatrix(t,m);
47 if (flags&PF_CXFORM) swf_SetCXForm(t,cx,1);
48 if (flags&PF_RATIO) swf_SetU16(t,0);
49 if (flags&PF_NAME) swf_SetString(t,name);
54 int swf_ObjectPlaceClip(TAG * t,U16 id,U16 depth,MATRIX * m,CXFORM * cx,U8 * name, U16 clipaction)
58 if(cx && cx->r1==0 && cx->g1==0 && cx->b1==0 && cx->a1==0
59 && cx->r0==256 && cx->g0==256 && cx->b0==256 && cx->a0==256)
62 flags = (id?PF_CHAR:0)|(m?PF_MATRIX:0)|(cx?PF_CXFORM:0)|(name?PF_NAME:0)|
63 ((m||cx)&&(!id)?PF_MOVE:0)|(clipaction?PF_CLIPACTION:0);
67 if (flags&PF_CHAR) swf_SetU16(t,id);
68 if (flags&PF_MATRIX) swf_SetMatrix(t,m);
69 if (flags&PF_CXFORM) swf_SetCXForm(t,cx,1);
70 if (flags&PF_RATIO) swf_SetU16(t,0);
72 /* ??? The spec states that name comes first? */
73 if (flags&PF_CLIPACTION) swf_SetU16(t, clipaction);
74 if (flags&PF_NAME) swf_SetString(t,name);
78 int swf_ObjectMove(TAG * t,U16 depth,MATRIX * m,CXFORM * cx)
79 { return swf_ObjectPlace(t,0,depth,m,cx,NULL);
82 int isUnitMatrix(MATRIX* m)
84 /* a matrix with all zeros is also considered
85 "unit matrix", as a zeroed out MATRIX structure
86 usually means that the caller doesn't want to
88 if(( (m->sx == 0x10000 && m->sy == 0x10000)
89 || (m->sx == 0 && m->sy == 0))
90 && ((m->r0|m->r1|m->tx|m->ty) == 0)
96 int isUnitCXForm(CXFORM* cx)
98 if((cx->a0==256 && cx->r0==256 && cx->g0==256 && cx->b0==256) &&
99 (cx->a1==0 && cx->r1==0 && cx->g1==0 && cx->b1==0))
101 /* A CXForm of all zeros is, unfortunately, not as unlikely
102 as a matrix of all zeros. However, we still treat it
103 as non-existent/uniform transform */
104 if((cx->a0==0 && cx->r0==0 && cx->g0==0 && cx->b0==0) &&
105 (cx->a1==0 && cx->r1==0 && cx->g1==0 && cx->b1==0))
110 void swf_SetPlaceObject(TAG * t,SWFPLACEOBJECT* obj)
114 if(t->id == ST_PLACEOBJECT) {
115 swf_SetU16(t, obj->id);
116 swf_SetU16(t, obj->depth);
117 swf_SetMatrix(t, &obj->matrix);
118 swf_SetCXForm(t, &obj->cxform, 0);
120 int m = !isUnitMatrix(&obj->matrix);
121 int cx = !isUnitCXForm(&obj->cxform);
123 flags = (obj->id?PF_CHAR:0)|(m?PF_MATRIX:0)|(cx?PF_CXFORM:0)|(obj->ratio?PF_RATIO:0)|
124 (obj->name?PF_NAME:0)|(obj->move?PF_MOVE:0)|
125 (obj->clipdepth?PF_CLIPACTION:0);
128 swf_SetU16(t,obj->depth);
129 if (flags&PF_CHAR) swf_SetU16(t,obj->id);
130 if (flags&PF_MATRIX) swf_SetMatrix(t,&obj->matrix);
131 if (flags&PF_CXFORM) swf_SetCXForm(t,&obj->cxform,1);
132 if (flags&PF_RATIO) swf_SetU16(t,obj->ratio);
134 /* ??? The spec states that name comes first? */
135 if (flags&PF_CLIPACTION) swf_SetU16(t,obj->clipdepth);
136 if (flags&PF_NAME) swf_SetString(t,obj->name);
137 if (flags&PF_ACTIONEVENT) {
143 void swf_GetPlaceObject(TAG * tag,SWFPLACEOBJECT* obj)
147 memset(obj, 0, sizeof(SWFPLACEOBJECT));
148 swf_GetMatrix(0, &obj->matrix);
149 swf_GetCXForm(0, &obj->cxform, 1);
153 flags = swf_GetU8(tag);
154 memset(obj,0,sizeof(SWFPLACEOBJECT));
156 swf_GetMatrix(0,&obj->matrix);
157 swf_GetCXForm(0,&obj->cxform,1);
159 obj->depth = swf_GetU16(tag);
161 if(flags&2) obj->id = swf_GetU16(tag);
162 if(flags&4) swf_GetMatrix(tag, &obj->matrix);
163 if(flags&8) swf_GetCXForm(tag, &obj->cxform,1);
164 if(flags&16) obj->ratio = swf_GetU16(tag);
165 /* if you modify the order of these operations, also
166 modify it in ../src/swfcombine.c */
168 obj->clipdepth = swf_GetU16(tag); //clip
172 swf_ResetReadBits(tag);
173 l = strlen(&tag->data[tag->pos]);
177 while((data[t++] = swf_GetU8(tag)));
180 /* Actionscript ignored (for now) */
184 void swf_PlaceObjectFree(SWFPLACEOBJECT* obj)