/* [<][>][^][v][top][bottom][index][help] */
DEFINITIONS
This source file includes following definitions.
- args_callback_option
- args_callback_longoption
- args_callback_usage
- args_callback_command
- swf_Shape2Optimize
- hasid
- hasname
- getname
- getmatrix
- fontcallback1
- fontcallback2
- readPlacements
- freePlacements
- clipBBox
- textcallback
- swf_OptimizeBoundingBoxes
- showSwiftyOutput
- getMovieClipBBox
- getSWFBBox
- main
/* swfbbox.c
Tool for playing around with SWF bounding boxes.
Part of the swftools package.
Copyright (c) 2003 Matthias Kramm <kramm@quiss.org>
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 "../config.h"
#include <stdio.h>
#include <stdarg.h>
#include <assert.h>
#include <unistd.h>
#include <fcntl.h>
#include "../lib/rfxswf.h"
#include "../lib/args.h"
#include "../lib/log.h"
static char * filename = 0;
static char * outfilename = "output.swf";
static int optimize = 0;
static int swifty = 0;
static int verbose = 0;
static int showbbox = 0;
static int showorigbbox = 1;
static int expand = 0;
static int clip = 0;
static int checkclippings = 0;
static struct options_t options[] = {
{"h", "help"},
{"b", "bbox"},
{"B", "newbbox"},
{"e", "expand"},
{"O", "optimize"},
{"S", "swifty"},
{"c", "clip"},
{"o", "output"},
{"v", "verbose"},
{"V", "version"},
{0,0}
};
int args_callback_option(char*name,char*val)
{
if(!strcmp(name, "V")) {
printf("swfbbox - part of %s %s\n", PACKAGE, VERSION);
exit(0);
}
else if(!strcmp(name, "b")) {
showorigbbox = 2;
if(showbbox == 1) showbbox = 0;
return 0;
}
else if(!strcmp(name, "B")) {
showbbox = 2;
return 0;
}
else if(!strcmp(name, "O")) {
optimize = 1;
if(showorigbbox == 1) showorigbbox = 0;
return 0;
}
else if(!strcmp(name, "S")) {
swifty = 1;
if(showorigbbox == 1) showorigbbox = 0;
return 0;
}
else if(!strcmp(name, "c")) {
if(showorigbbox == 1) showorigbbox = 0;
clip = 1;
return 0;
}
else if(!strcmp(name, "v")) {
verbose ++;
return 0;
}
else if(!strcmp(name, "q")) {
if(verbose)
verbose --;
return 0;
}
else if(!strcmp(name, "Q")) {
/* DEPRECATED- was used for testing the bbox-clip feature
of pdf2swf */
if(showorigbbox == 1) showorigbbox = 0;
checkclippings = 1;
return 0;
}
else if(!strcmp(name, "e")) {
expand = 1;
return 0;
}
else if(!strcmp(name, "o")) {
outfilename = val;
return 1;
}
else {
printf("Unknown option: -%s\n", name);
exit(1);
}
return 0;
}
int args_callback_longoption(char*name,char*val)
{
return args_long2shortoption(options, name, val);
}
void args_callback_usage(char *name)
{
printf("\n");
printf("Usage: %s [-OS] file.swf\n", name);
printf("\n");
printf("-h , --help Print help and exit\n");
printf("-b , --bbox Show movie bounding box (default)\n");
printf("-B , --newbbox Show recalculated (optimized/expanded) bounding box\n");
printf("-e , --expand Write out a new file using the recalculated header bounding box\n");
printf("-O , --optimize Recalculate all object bounding boxes (except for the header)\n");
printf("-S , --swifty Print out transformed bounding boxes\n");
printf("-c , --clip Clip bounding boxes to movie size\n");
printf("-o , --output <filename> Set output filename to <filename> (for -O)\n");
printf("-v , --verbose Be more verbose\n");
printf("-V , --version Print program version and exit\n");
printf("\n");
}
int args_callback_command(char*name,char*val)
{
if(filename) {
fprintf(stderr, "Only one file allowed. You supplied at least two. (%s and %s)\n",
filename, name);
}
filename = name;
return 0;
}
#define swf_ResetReadBits(tag) if (tag->readBit) { tag->pos++; tag->readBit = 0; }
void swf_Shape2Optimize(SHAPE2*shape)
{
if(!shape->bbox)
shape->bbox = malloc(sizeof(SRECT));
*(shape->bbox) = swf_GetShapeBoundingBox(shape);
}
/*
{char {x1 y1 x2 y2 x3 y3 x4 y4]]
*/
SRECT bboxes[65536];
U16 depth2id[65536];
char*depth2name[65536];
int hasid(TAG*tag)
{
if(tag->id == ST_PLACEOBJECT)
return 1;
if(tag->id == ST_PLACEOBJECT2 && (tag->data[0] & 2))
return 1;
if(tag->id == ST_PLACEOBJECT3 && (tag->data[0] & 2))
return 1;
return 0;
}
int hasname(TAG*tag)
{
if(tag->id == ST_PLACEOBJECT)
return 0;
if(tag->id == ST_PLACEOBJECT2 && (tag->data[0] & 0x20))
return 1;
if(tag->id == ST_PLACEOBJECT3 && (tag->data[0] & 0x20))
return 1;
return 0;
}
char* getname(TAG*tag)
{
if(tag->id == ST_PLACEOBJECT)
return 0;
if(tag->id == ST_PLACEOBJECT2 && (tag->data[0] & 0x20)) {
SWFPLACEOBJECT o;
tag->pos = 0;tag->readBit = 0;
swf_GetPlaceObject(tag, &o);
return o.name;
}
if(tag->id == ST_PLACEOBJECT3 && (tag->data[0] & 0x20)) {
SWFPLACEOBJECT o;
tag->pos = 0;tag->readBit = 0;
swf_GetPlaceObject(tag, &o);
return o.name;
}
return 0;
}
MATRIX getmatrix(TAG*tag)
{
SWFPLACEOBJECT o;
tag->pos = 0;tag->readBit = 0;
swf_GetPlaceObject(tag, &o);
return o.matrix;
}
static int fontnum = -1;
static SWFFONT**fonts;
static SWF*c_swf;
static void fontcallback1(void*self, U16 id,U8 * name)
{ fontnum++;
}
static void fontcallback2(void*self, U16 id,U8 * name)
{
fonts[fontnum] = 0;
swf_FontExtract(c_swf,id,&fonts[fontnum]);
if(verbose) {
if(fonts[fontnum]) printf("Extracting font %d (%s)\n", id, name);
else printf("Extracting font %d (%s) failed\n", id, name);
fflush(stdout);
}
fontnum++;
}
typedef struct _textbounds
{
SRECT r;
MATRIX m; // character transform matrix
} textbounds_t;
typedef struct _placement
{
SWFPLACEOBJECT* po;
int num;
} placement_t;
static placement_t* placements;
static placement_t* readPlacements(SWF*swf)
{
placement_t* p = (placement_t*)rfx_calloc(sizeof(placement_t)*65536);
TAG*tag = swf->firstTag;
while(tag) {
if(swf_isPlaceTag(tag)) {
SWFPLACEOBJECT*po = rfx_alloc(sizeof(SWFPLACEOBJECT));
int id;
swf_GetPlaceObject(tag, po);
id = po->id;
if(po->move) {
fprintf(stderr, "MOVE tags not supported with -c");
}
p[id].po = po;
p[id].num++;
}
tag = tag->next;
}
return p;
}
static void freePlacements(placement_t*p)
{
int t;
for(t=0;t<65536;t++) {
if(p[t].po) {
swf_PlaceObjectFree(p[t].po); p[t].po = 0;
}
}
rfx_free(p);
}
static SRECT clipBBox(TAG*tag, SRECT mbbox, SRECT r)
{
int id = swf_GetDefineID(tag);
MATRIX m;
if(!placements[id].po) {
if(verbose)
printf("Id %d is never set\n", id);
return r;
}
if(placements[id].num>1) {
if(verbose)
printf("Id %d is set more than once\n", id);
return r;
}
m = placements[id].po->matrix;
if(m.r0 || m.r1) {
fprintf(stderr, "Rotating PLACEOBJECTS are not supported with -c\n");
return r;
}
if(verbose) {
printf("ID %d\n", id);
swf_DumpMatrix(stdout, &m);
}
mbbox.xmin -= m.tx;
mbbox.ymin -= m.ty;
mbbox.xmax -= m.tx;
mbbox.ymax -= m.ty;
mbbox.xmin *= 65536.0/m.sx;
mbbox.xmax *= 65536.0/m.sx;
mbbox.ymin *= 65536.0/m.sy;
mbbox.ymax *= 65536.0/m.sy;
if(verbose) {
printf("border: %f/%f/%f/%f - rect: %f/%f/%f/%f\n",
mbbox.xmin /20.0,
mbbox.ymin /20.0,
mbbox.xmax /20.0,
mbbox.ymax /20.0,
r.xmin /20.0,
r.ymin /20.0,
r.xmax /20.0,
r.ymax /20.0);
}
if(checkclippings) {
int clip = 0;
if(r.xmax > mbbox.xmax) clip += r.xmax - mbbox.xmax;
if(r.ymax > mbbox.ymax) clip += r.ymax - mbbox.ymax;
if(r.xmax < mbbox.xmin) clip += -(r.xmax - mbbox.xmin);
if(r.ymax < mbbox.ymin) clip += -(r.ymax - mbbox.ymin);
if(r.xmin > mbbox.xmax) clip += r.xmin = mbbox.xmax;
if(r.ymin > mbbox.ymax) clip += r.ymin = mbbox.ymax;
if(r.xmin < mbbox.xmin) clip += -(r.xmin = mbbox.xmin);
if(r.ymin < mbbox.ymin) clip += -(r.ymin = mbbox.ymin);
if(clip > 3*20) {
printf("needs clipping: [%.2f %.2f %2.f %2.f] is outside [%.2f %2.f %2.f %2.f]\n",
r.xmin / 20.0, r.ymin / 20.0, r.xmax / 20.0, r.ymax / 20.0,
mbbox.xmin / 20.0, mbbox.ymin / 20.0, mbbox.xmax / 20.0, mbbox.ymax / 20.0
);
}
}
r = swf_ClipRect(mbbox, r);
if(verbose) {
printf("new rect: %f/%f/%f/%f\n",
r.xmin /20.0,
r.ymin /20.0,
r.xmax /20.0,
r.ymax /20.0);
}
return r;
}
static void textcallback(void*self, int*chars, int*xpos, int nr, int fontid, int fontsize,
int xstart, int ystart, RGBA* color)
{
textbounds_t * bounds = (textbounds_t*)self;
SWFFONT*font = 0;
int t;
for(t=0;t<fontnum;t++) {
if(fonts[t]->id == fontid) {
font = fonts[t];
break;
}
}
if(!font) {
fprintf(stderr, "Font %d unknown\n", fontid);
exit(1);
}
if(!font->layout) {
/* This is an expensive operation- but what should we do, we
need the glyph's bounding boxes */
swf_FontCreateLayout(font);
}
if(verbose)
printf("%d chars, font %d, size %d, at (%d,%d)\n", nr, fontid, fontsize, xstart, ystart);
for(t=0;t<nr;t++) {
/* not tested yet- the matrix/fontsize calculation is probably all wrong */
int x = xstart + xpos[t];
int y = ystart;
int ch = 0;
SRECT newglyphbbox, glyphbbox = font->layout->bounds[chars[t]];
MATRIX m = bounds->m;
SPOINT p;
if(chars[t] < font->numchars && font->glyph2ascii) {
ch = font->glyph2ascii[chars[t]];
}
p.x = x; p.y = y;
p = swf_TurnPoint(p, &m);
m.sx = (m.sx * fontsize) / 1024;
m.sy = (m.sy * fontsize) / 1024;
m.r0 = (m.r0 * fontsize) / 1024;
m.r1 = (m.r1 * fontsize) / 1024;
m.tx += p.x;
m.ty += p.y;
newglyphbbox = swf_TurnRect(glyphbbox, &m);
if(ch<32) ch='?';
swf_ExpandRect2(&(bounds->r), &newglyphbbox);
if(verbose >= 2) {
printf("%5d %c, %d %d %d %d (%d %d %d %d) -> %d %d %d %d\n",
xpos[t], ch,
glyphbbox.xmin, glyphbbox.ymin, glyphbbox.xmax, glyphbbox.ymax,
newglyphbbox.xmin, newglyphbbox.ymin, newglyphbbox.xmax, newglyphbbox.ymax,
bounds->r.xmin, bounds->r.ymin, bounds->r.xmax, bounds->r.ymax);
}
}
}
static void swf_OptimizeBoundingBoxes(SWF*swf)
{
TAG* tag = swf->firstTag;
while (tag) {
if (tag->id == ST_DEFINESHAPE ||
tag->id == ST_DEFINESHAPE2 ||
tag->id == ST_DEFINESHAPE3 ||
tag->id == ST_DEFINESHAPE4) {
SHAPE2 s;
if(verbose) printf("%s\n", swf_TagGetName(tag));
swf_ParseDefineShape(tag, &s);
if(optimize)
swf_Shape2Optimize(&s);
tag->len = 2;
tag->pos = 0;
if(!s.bbox) {
fprintf(stderr, "Internal error (5)\n");
exit(1);
}
if(clip || checkclippings) {
*s.bbox = clipBBox(tag, swf->movieSize, *s.bbox);
}
swf_SetShape2(tag, &s);
}
if (tag->id == ST_DEFINETEXT || tag->id == ST_DEFINETEXT2) {
SRECT oldbox;
int matrix_offset;
int len;
U8*data;
textbounds_t bounds;
if(verbose) printf("%s\n", swf_TagGetName(tag));
if(fontnum < 0) {
if(verbose) printf("Extracting fonts...\n");
c_swf = swf;
fontnum = 0;
swf_FontEnumerate(swf,&fontcallback1,0);
fonts = (SWFFONT**)malloc(fontnum*sizeof(SWFFONT*));
memset(fonts, 0, fontnum*sizeof(SWFFONT*));
fontnum = 0;
swf_FontEnumerate(swf,&fontcallback2,0);
}
memset(&bounds, 0, sizeof(bounds));
swf_SetTagPos(tag, 0);
swf_GetU16(tag);
swf_GetRect(tag,&oldbox);
swf_ResetReadBits(tag);
matrix_offset = tag->pos;
swf_GetMatrix(tag,&bounds.m);
swf_ParseDefineText(tag, textcallback, &bounds);
if(verbose) {
printf("\n");
swf_DumpMatrix(stdout, &bounds.m);
printf("old: %d %d %d %d\n", oldbox.xmin, oldbox.ymin, oldbox.xmax, oldbox.ymax);
printf("new: %d %d %d %d\n", bounds.r.xmin, bounds.r.ymin, bounds.r.xmax, bounds.r.ymax);
}
if(!optimize)
bounds.r = oldbox; //set to old bounds from the tag header
if(clip || checkclippings) {
bounds.r = clipBBox(tag, swf->movieSize, bounds.r);
}
/* now comes the tricky part:
we have to fiddle the data back in
thank heavens that the bbox is follow by a matrix
struct, which always starts on a byte boundary.
*/
len = tag->len - matrix_offset;
data = malloc(len);
memcpy(data, &tag->data[matrix_offset], len);
tag->writeBit = 0;
tag->len = 2;
swf_SetRect(tag, &bounds.r);
swf_SetBlock(tag, data, len);
free(data);
tag->pos = tag->readBit = 0;
}
tag = tag->next;
}
}
static void showSwiftyOutput(SWF*swf)
{
TAG*tag = swf->firstTag;
int frame=0;
printf("{\n\t{frame %d}\n", frame++);
while (tag) {
if (tag->id == ST_SHOWFRAME) {
printf("}\n{\n\t{frame %d}\n", frame++);
}
if (swf_isPlaceTag(tag)) {
if(hasid(tag)) {
depth2id[swf_GetDepth(tag)] = swf_GetPlaceID(tag);
}
if(hasname(tag)) {
depth2name[swf_GetDepth(tag)] = getname(tag);
}
}
if (swf_isPlaceTag(tag)) {
MATRIX m = getmatrix(tag);
U16 id = depth2id[swf_GetDepth(tag)];
char*name = depth2name[swf_GetDepth(tag)];
char buf[40];
SRECT bbox = bboxes[id];
SPOINT p1,p2,p3,p4;
p1.x = bbox.xmin; p1.y = bbox.ymin;
p2.x = bbox.xmax; p2.y = bbox.ymin;
p3.x = bbox.xmin; p3.y = bbox.ymax;
p4.x = bbox.xmax; p4.y = bbox.ymax;
p1 = swf_TurnPoint(p1, &m);
p2 = swf_TurnPoint(p2, &m);
p3 = swf_TurnPoint(p3, &m);
p4 = swf_TurnPoint(p4, &m);
if(!name) {
sprintf(buf, "ID%d", id);name = buf;
}
//printf("\t#%.4f %.4f %.4f %.4f | %.4f %.4f\n", m.sx/65536.0, m.r1/65536.0, m.r0/65536.0, m.sy/65536.0, m.tx/20.0, m.ty/20.0);
printf("\t{%s {%.2f %.2f %.2f %.2f %.2f %.2f %.2f %.2f}}\n", name,
p1.x/20.0, p1.y/20.0, p2.x/20.0, p2.y/20.0,
p3.x/20.0, p3.y/20.0, p4.x/20.0, p4.y/20.0);
}
tag = tag->next;
}
printf("}\n");
}
static SRECT getMovieClipBBox(TAG*tag)
{
//TAG*tag = swf->firstTag;
int frame=0;
SRECT movieSize;
U16 depth2id[65536];
memset(depth2id, 0, sizeof(depth2id));
memset(&movieSize,0,sizeof(SRECT));
while (tag && tag->id != ST_END) {
if (swf_isPlaceTag(tag)) {
if(hasid(tag)) {
depth2id[swf_GetDepth(tag)] = swf_GetPlaceID(tag);
}
}
if (swf_isPlaceTag(tag)) {
MATRIX m = getmatrix(tag);
U16 id = depth2id[swf_GetDepth(tag)];
SRECT bbox = bboxes[id];
SRECT tbbox = swf_TurnRect(bbox, &m);
swf_ExpandRect2(&movieSize, &tbbox);
}
tag = tag->next;
}
return movieSize;
}
static SRECT getSWFBBox(SWF*swf)
{
SRECT movieSize = getMovieClipBBox(swf->firstTag);
return movieSize;
}
int main (int argc,char ** argv)
{
TAG*tag;
SWF swf;
int fi;
SRECT oldMovieSize;
SRECT newMovieSize;
memset(bboxes, 0, sizeof(bboxes));
memset(depth2name, 0, sizeof(depth2name));
processargs(argc, argv);
initLog(0,0,0,0,0,verbose?LOGLEVEL_DEBUG:LOGLEVEL_WARNING);
if(!filename) {
fprintf(stderr, "You must supply a filename.\n");
return 1;
}
fi = open(filename,O_RDONLY|O_BINARY);
if (fi<0)
{
perror("Couldn't open file: ");
exit(1);
}
if FAILED(swf_ReadSWF(fi,&swf))
{
fprintf(stderr, "%s is not a valid SWF file or contains errors.\n",filename);
close(fi);
exit(1);
}
close(fi);
swf_OptimizeTagOrder(&swf);
if(clip || checkclippings) {
placements = readPlacements(&swf);
}
swf_FoldAll(&swf);
/* Optimize bounding boxes in case -O flag was set */
if(optimize || checkclippings || clip) {
swf_OptimizeBoundingBoxes(&swf);
}
/* Create an ID to Bounding Box table */
tag = swf.firstTag;
while (tag) {
if(swf_isDefiningTag(tag)) {
int id = swf_GetDefineID(tag);
if(tag->id != ST_DEFINESPRITE) {
bboxes[id] = swf_GetDefineBBox(tag);
} else {
swf_UnFoldSprite(tag);
bboxes[id] = getMovieClipBBox(tag);
swf_FoldSprite(tag);
if(verbose) {
printf("sprite %d is %.2fx%.2f\n", id,
(bboxes[id].xmax - bboxes[id].xmin)/20.0,
(bboxes[id].ymax - bboxes[id].ymin)/20.0);
}
}
}
tag = tag->next;
}
/* Create an ID->Bounding Box table for all bounding boxes */
if(swifty) {
showSwiftyOutput(&swf);
}
oldMovieSize = swf.movieSize;
newMovieSize = getSWFBBox(&swf);
if(optimize || expand) {
if(expand)
swf.movieSize = newMovieSize;
fi = open(outfilename, O_BINARY | O_RDWR | O_CREAT | O_TRUNC, 0666);
if(swf_WriteSWF(fi, &swf) < 0) {
fprintf(stderr, "Error writing file %s", outfilename);
close(fi);
exit(1);
}
close(fi);
}
if(showbbox) {
if(verbose>=0)
printf("Real Movie Size (size of visible objects): ");
printf("%.2f x %.2f :%.2f :%.2f\n",
(newMovieSize.xmax-newMovieSize.xmin)/20.0,
(newMovieSize.ymax-newMovieSize.ymin)/20.0,
(newMovieSize.xmin)/20.0,
(newMovieSize.ymin)/20.0
);
}
if(showorigbbox) {
if(verbose>=0)
printf("Movie Size accordings to file header: ");
printf("%.2f x %.2f :%.2f :%.2f\n",
(oldMovieSize.xmax-oldMovieSize.xmin)/20.0,
(oldMovieSize.ymax-oldMovieSize.ymin)/20.0,
(oldMovieSize.xmin)/20.0,
(oldMovieSize.ymin)/20.0
);
}
swf_FreeTags(&swf);
if(placements) {
freePlacements(placements);
}
return 0;
}