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_CLIPDEPTH 0x40
31 #define PF_ACTIONEVENT 0x80
33 #define PF2_FILTERS 0x01
34 #define PF2_BLENDMODE 0x02
35 #define PF2_ASBITMAP 0x04
38 char*blendModeNames[] = {"normal","normal2","layer","multiply",
39 "screen","lighten", "darken","add",
40 "substract","difference","invert","alpha",
41 "erase","overlay","hardlight",0};
43 int isUnitMatrix(MATRIX* m)
45 /* a matrix with all zeros is also considered
46 "unit matrix", as a zeroed out MATRIX structure
47 usually means that the caller doesn't want to
49 if(( (m->sx == 0x10000 && m->sy == 0x10000)
50 || (m->sx == 0 && m->sy == 0))
51 && ((m->r0|m->r1|m->tx|m->ty) == 0)
57 int isUnitCXForm(CXFORM* cx)
59 if((cx->a0==256 && cx->r0==256 && cx->g0==256 && cx->b0==256) &&
60 (cx->a1==0 && cx->r1==0 && cx->g1==0 && cx->b1==0))
62 /* A CXForm of all zeros is, unfortunately, not as unlikely
63 as a matrix of all zeros. However, we still treat it
64 as non-existent/uniform transform */
65 if((cx->a0==0 && cx->r0==0 && cx->g0==0 && cx->b0==0) &&
66 (cx->a1==0 && cx->r1==0 && cx->g1==0 && cx->b1==0))
71 static int objectplace(TAG * t,U16 id,U16 depth,MATRIX * m,CXFORM * cx,U8 * name, U16 clipaction, U8 blendmode, FILTERLIST*filters)
75 if(cx && id && cx->r1==0 && cx->g1==0 && cx->b1==0 && cx->a1==0
76 && cx->r0==256 && cx->g0==256 && cx->b0==256 && cx->a0==256)
79 if(m && id && isUnitMatrix(m))
82 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);
83 flags2 = (0?PF2_ASBITMAP:0)|(blendmode?PF2_BLENDMODE:0)|(filters?PF2_FILTERS:0);
86 if(t->id == ST_PLACEOBJECT3)
89 if (flags&PF_CHAR) swf_SetU16(t,id);
90 if (flags&PF_MATRIX) swf_SetMatrix(t,m);
91 if (flags&PF_CXFORM) swf_SetCXForm(t,cx,1);
92 if (flags&PF_RATIO) swf_SetU16(t,0);
93 /* ??? The spec states that name comes first? */
94 if (flags&PF_CLIPDEPTH) swf_SetU16(t, clipaction);
95 if (flags&PF_NAME) swf_SetString(t,name);
97 if (flags2&PF2_BLENDMODE)
98 swf_SetU8(t,blendmode);
101 int swf_ObjectPlace(TAG * t,U16 id,U16 depth,MATRIX * m,CXFORM * cx,U8 * name)
103 return objectplace(t,id,depth,m,cx,name,0,0,0);
105 int swf_ObjectPlaceClip(TAG * t,U16 id,U16 depth,MATRIX * m,CXFORM * cx,U8 * name, U16 clipaction)
107 return objectplace(t,id,depth,m,cx,name,clipaction,0,0);
109 int swf_ObjectPlaceBlend(TAG * t,U16 id,U16 depth,MATRIX * m,CXFORM * cx,U8 * name, U8 blend)
111 if(t->id != ST_PLACEOBJECT3)
112 fprintf(stderr, "wrong tag- ignoring blend mode\n");
113 return objectplace(t,id,depth,m,cx,name,0,blend,0);
115 int swf_ObjectMove(TAG * t,U16 depth,MATRIX * m,CXFORM * cx)
117 return objectplace(t,0,depth,m,cx,0,0,0,0);
120 void swf_SetPlaceObject(TAG * t,SWFPLACEOBJECT* obj)
123 if(t->id == ST_PLACEOBJECT) {
124 swf_SetU16(t, obj->id);
125 swf_SetU16(t, obj->depth);
126 swf_SetMatrix(t, &obj->matrix);
127 swf_SetCXForm(t, &obj->cxform, 0);
130 int m = !isUnitMatrix(&obj->matrix);
131 int cx = !isUnitCXForm(&obj->cxform);
133 flags = (obj->id?PF_CHAR:0)|(m?PF_MATRIX:0)|(cx?PF_CXFORM:0)|(obj->ratio?PF_RATIO:0)|
134 (obj->name?PF_NAME:0)|(obj->move?PF_MOVE:0)|
135 (obj->clipdepth?PF_CLIPDEPTH:0);
136 flags2 = (0?PF2_ASBITMAP:0)|(obj->blendmode?PF2_BLENDMODE:0)|(obj->filters?PF2_FILTERS:0);
139 if(t->id == ST_PLACEOBJECT2)
141 swf_SetU16(t,obj->depth);
142 if (flags&PF_CHAR) swf_SetU16(t,obj->id);
143 if (flags&PF_MATRIX) swf_SetMatrix(t,&obj->matrix);
144 if (flags&PF_CXFORM) swf_SetCXForm(t,&obj->cxform,1);
145 if (flags&PF_RATIO) swf_SetU16(t,obj->ratio);
147 /* ??? The spec states that name comes first? */
148 if (flags&PF_CLIPDEPTH) swf_SetU16(t,obj->clipdepth);
149 if (flags&PF_NAME) swf_SetString(t,obj->name);
151 if (flags2&PF2_FILTERS) {
154 if (flags2&PF2_BLENDMODE)
155 swf_SetU8(t,obj->blendmode);
156 if (flags&PF_ACTIONEVENT) {
162 void swf_GetPlaceObject(TAG * tag,SWFPLACEOBJECT* obj)
165 memset(obj, 0, sizeof(SWFPLACEOBJECT));
166 swf_GetMatrix(0, &obj->matrix);
167 swf_GetCXForm(0, &obj->cxform, 1);
168 //obj->internal = PF_CHAR|PF_MATRIX|PF_CXFORM;
171 swf_SetTagPos(tag, 0);
173 if(tag->id == ST_PLACEOBJECT) {
174 obj->id = swf_GetU16(tag);
175 obj->depth = swf_GetU16(tag);
176 swf_GetMatrix(tag, &obj->matrix);
177 swf_GetCXForm(tag, &obj->cxform, 0);
178 //obj->internal = PF_CHAR|PF_MATRIX|PF_CXFORM;
179 } else if(tag->id == ST_PLACEOBJECT2 || tag->id == ST_PLACEOBJECT3) {
181 flags = swf_GetU8(tag);
182 if(tag->id == ST_PLACEOBJECT3)
183 flags2 = swf_GetU8(tag);
184 memset(obj,0,sizeof(SWFPLACEOBJECT));
186 swf_GetMatrix(0,&obj->matrix);
187 swf_GetCXForm(0,&obj->cxform,1);
189 obj->depth = swf_GetU16(tag);
190 //obj->internal = flags;
191 if(flags&PF_MOVE) obj->move = 1;
192 if(flags&PF_CHAR) obj->id = swf_GetU16(tag);
193 if(flags&PF_MATRIX) swf_GetMatrix(tag, &obj->matrix);
194 if(flags&PF_CXFORM) swf_GetCXForm(tag, &obj->cxform,1);
195 if(flags&PF_RATIO) obj->ratio = swf_GetU16(tag);
196 /* if you modify the order of these operations, also
197 modify it in ../src/swfcombine.c */
198 if(flags&PF_CLIPDEPTH)
199 obj->clipdepth = swf_GetU16(tag); //clip
203 swf_ResetReadBits(tag);
204 l = strlen(&tag->data[tag->pos]);
206 data = rfx_alloc(l+1);
208 while((data[t++] = swf_GetU8(tag)));
210 if(flags2&PF2_BLENDMODE) {
211 obj->blendmode = swf_GetU8(tag);
214 /* Actionscript ignored (for now) */
217 fprintf(stderr, "rfxswf: Bad Tag: %d not a placeobject\n", tag->id);
221 void swf_PlaceObjectFree(SWFPLACEOBJECT* obj)