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/* swfobject.c
Object place and move routines
Extension module for the rfxswf library.
Part of the swftools package.
Copyright (c) 2001 Rainer Bhme <rfxswf@reflex-studio.de>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
#include "../rfxswf.h"
char*blendModeNames[] = {"normal","normal2","layer","multiply",
"screen","lighten", "darken","add",
"substract","difference","invert","alpha",
"erase","overlay","hardlight",0};
int isUnitMatrix(MATRIX* m)
{
/* a matrix with all zeros is also considered
"unit matrix", as a zeroed out MATRIX structure
usually means that the caller doesn't want to
set the matrix */
if(( (m->sx == 0x10000 && m->sy == 0x10000)
|| (m->sx == 0 && m->sy == 0))
&& ((m->r0|m->r1|m->tx|m->ty) == 0)
)
return 1;
return 0;
}
int isUnitCXForm(CXFORM* cx)
{
if((cx->a0==256 && cx->r0==256 && cx->g0==256 && cx->b0==256) &&
(cx->a1==0 && cx->r1==0 && cx->g1==0 && cx->b1==0))
return 1;
/* A CXForm of all zeros is, unfortunately, not as unlikely
as a matrix of all zeros. However, we still treat it
as non-existent/uniform transform */
if((cx->a0==0 && cx->r0==0 && cx->g0==0 && cx->b0==0) &&
(cx->a1==0 && cx->r1==0 && cx->g1==0 && cx->b1==0))
return 1;
return 0;
}
static int objectplace(TAG * t,U16 id,U16 depth,MATRIX * m,CXFORM * cx,const char * name, U16 clipaction, U8 blendmode, FILTERLIST*filters)
{ U8 flags,flags2;
if (!t) return -1;
if(cx && id && cx->r1==0 && cx->g1==0 && cx->b1==0 && cx->a1==0
&& cx->r0==256 && cx->g0==256 && cx->b0==256 && cx->a0==256)
cx = 0;
if(m && id && isUnitMatrix(m))
m = 0;
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);
flags2 = (0?PF2_ASBITMAP:0)|(blendmode?PF2_BLENDMODE:0)|(filters?PF2_FILTERS:0);
swf_SetU8(t,flags);
if(t->id == ST_PLACEOBJECT3)
swf_SetU8(t, flags2);
swf_SetU16(t,depth);
if (flags&PF_CHAR) swf_SetU16(t,id);
if (flags&PF_MATRIX) swf_SetMatrix(t,m);
if (flags&PF_CXFORM) swf_SetCXForm(t,cx,1);
if (flags&PF_RATIO) swf_SetU16(t,0);
/* ??? The spec states that name comes first? */
if (flags&PF_CLIPDEPTH) swf_SetU16(t, clipaction);
if (flags&PF_NAME) swf_SetString(t,name);
if (flags2&PF2_BLENDMODE)
swf_SetU8(t,blendmode);
return 0;
}
int swf_ObjectPlace(TAG * t,U16 id,U16 depth,MATRIX * m,CXFORM * cx,const char * name)
{
return objectplace(t,id,depth,m,cx,name,0,0,0);
}
int swf_ObjectPlaceClip(TAG * t,U16 id,U16 depth,MATRIX * m,CXFORM * cx,const char * name, U16 clipaction)
{
return objectplace(t,id,depth,m,cx,name,clipaction,0,0);
}
int swf_ObjectPlaceBlend(TAG * t,U16 id,U16 depth,MATRIX * m,CXFORM * cx,const char * name, U8 blend)
{
if(t->id != ST_PLACEOBJECT3)
fprintf(stderr, "wrong tag- ignoring blend mode\n");
return objectplace(t,id,depth,m,cx,name,0,blend,0);
}
int swf_ObjectMove(TAG * t,U16 depth,MATRIX * m,CXFORM * cx)
{
return objectplace(t,0,depth,m,cx,0,0,0,0);
}
void swf_SetPlaceObject(TAG * t,SWFPLACEOBJECT* obj)
{
if (!t) return ;
if(t->id == ST_PLACEOBJECT) {
swf_SetU16(t, obj->id);
swf_SetU16(t, obj->depth);
swf_SetMatrix(t, &obj->matrix);
swf_SetCXForm(t, &obj->cxform, 0);
} else {
U8 flags,flags2;
int m = !isUnitMatrix(&obj->matrix);
int cx = !isUnitCXForm(&obj->cxform);
flags = (obj->id?PF_CHAR:0)|(m?PF_MATRIX:0)|(cx?PF_CXFORM:0)|(obj->ratio?PF_RATIO:0)|
(obj->name?PF_NAME:0)|(obj->move?PF_MOVE:0)|
(obj->clipdepth?PF_CLIPDEPTH:0);
flags2 = (0?PF2_ASBITMAP:0)|(obj->blendmode?PF2_BLENDMODE:0)|(obj->filters?PF2_FILTERS:0);
swf_SetU8(t,flags);
if(t->id == ST_PLACEOBJECT3)
swf_SetU8(t,flags2);
swf_SetU16(t,obj->depth);
if (flags&PF_CHAR) swf_SetU16(t,obj->id);
if (flags&PF_MATRIX) swf_SetMatrix(t,&obj->matrix);
if (flags&PF_CXFORM) swf_SetCXForm(t,&obj->cxform,1);
if (flags&PF_RATIO) swf_SetU16(t,obj->ratio);
/* ??? The spec states that name comes first? */
if (flags&PF_CLIPDEPTH) swf_SetU16(t,obj->clipdepth);
if (flags&PF_NAME) swf_SetString(t,obj->name);
if (flags2&PF2_FILTERS) {
swf_SetU8(t,obj->filters->num);
int s;
for(s=0;s<obj->filters->num;s++)
swf_SetFilter(t,obj->filters->filter[s]);
}
if (flags2&PF2_BLENDMODE)
swf_SetU8(t,obj->blendmode);
if (flags&PF_ACTIONEVENT) {
// ...
}
}
}
void swf_GetPlaceObject(TAG * tag,SWFPLACEOBJECT* obj)
{
if(obj)
memset(obj, 0, sizeof(SWFPLACEOBJECT));
if(!tag) {
swf_GetMatrix(0, &obj->matrix);
swf_GetCXForm(0, &obj->cxform, 1);
//obj->internal = PF_CHAR|PF_MATRIX|PF_CXFORM;
return;
}
swf_SetTagPos(tag, 0);
if(tag->id == ST_PLACEOBJECT) {
obj->id = swf_GetU16(tag);
obj->depth = swf_GetU16(tag);
swf_GetMatrix(tag, &obj->matrix);
swf_GetCXForm(tag, &obj->cxform, 0);
//obj->internal = PF_CHAR|PF_MATRIX|PF_CXFORM;
} else if(tag->id == ST_PLACEOBJECT2 || tag->id == ST_PLACEOBJECT3) {
U8 flags,flags2=0;
flags = swf_GetU8(tag);
if(tag->id == ST_PLACEOBJECT3)
flags2 = swf_GetU8(tag);
memset(obj,0,sizeof(SWFPLACEOBJECT));
swf_GetMatrix(0,&obj->matrix);
swf_GetCXForm(0,&obj->cxform,1);
obj->flags = flags;
obj->depth = swf_GetU16(tag);
//obj->internal = flags;
if(flags&PF_MOVE) obj->move = 1;
if(flags&PF_CHAR) obj->id = swf_GetU16(tag);
if(flags&PF_MATRIX) swf_GetMatrix(tag, &obj->matrix);
if(flags&PF_CXFORM) swf_GetCXForm(tag, &obj->cxform,1);
if(flags&PF_RATIO) obj->ratio = swf_GetU16(tag);
/* if you modify the order of these operations, also
modify it in ../src/swfcombine.c */
if(flags&PF_CLIPDEPTH)
obj->clipdepth = swf_GetU16(tag); //clip
if(flags&PF_NAME) {
int l,t;
U8*data;
swf_ResetReadBits(tag);
l = strlen((const char *)&tag->data[tag->pos]);
t = 0;
data = (U8*)rfx_alloc(l+1);
obj->name = (char*)data;
while((data[t++] = swf_GetU8(tag)));
}
if(flags2&PF2_BLENDMODE) {
obj->blendmode = swf_GetU8(tag);
}
/* Actionscript ignored (for now) */
obj->actions = 0;
} else {
fprintf(stderr, "rfxswf: Bad Tag: %d not a placeobject\n", tag->id);
}
}
void swf_PlaceObjectFree(SWFPLACEOBJECT* obj)
{
if(obj->name)
rfx_free(obj->name);
}
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