3 PNG to SWF converter tool
5 Part of the swftools package.
7 Copyright (c) 2002,2003 Matthias Kramm <kramm@quiss.org>
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
27 #include "../lib/rfxswf.h"
28 #include "../lib/args.h"
30 #define MAX_INPUT_FILES 1024
31 #define VERBOSE(x) (global.verbose>=x)
48 } image[MAX_INPUT_FILES];
50 TAG *MovieStart(SWF * swf, float framerate, int dx, int dy)
55 memset(swf, 0x00, sizeof(SWF));
57 swf->fileVersion = global.version;
58 swf->frameRate = (int)(256.0 * framerate);
59 swf->movieSize.xmax = dx * 20;
60 swf->movieSize.ymax = dy * 20;
62 t = swf->firstTag = swf_InsertTag(NULL, ST_SETBACKGROUNDCOLOR);
64 rgb.r = rgb.g = rgb.b = rgb.a = 0x00;
65 //rgb.g = 0xff; //<--- handy for testing alpha conversion
71 int MovieFinish(SWF * swf, TAG * t, char *sname)
73 int f, so = fileno(stdout);
74 t = swf_InsertTag(t, ST_END);
76 if ((!isatty(so)) && (!sname))
81 f = open(sname,O_WRONLY|O_CREAT|O_TRUNC|O_BINARY, 0644);
85 if FAILED(swf_WriteCGI(swf)) fprintf(stderr,"WriteCGI() failed.\n");
87 if(global.version >= 6) {
88 if (swf_WriteSWC(f, swf)<0)
89 fprintf(stderr, "Unable to write output file: %s\n", sname);
91 if (swf_WriteSWF(f, swf)<0)
92 fprintf(stderr, "Unable to write output file: %s\n", sname);
102 int png_read_chunk(char (*head)[4], int*destlen, U8**destdata, FILE*fi)
105 if(destlen) *destlen=0;
106 if(destdata) *destdata=0;
107 if(!fread(&len, 4, 1, fi))
109 if(!fread(head, 4, 1, fi))
111 len = REVERSESWAP32(len);
112 if(destlen) *destlen = len;
115 *destdata = malloc(len);
118 if(!fread(*destdata, len, 1, fi)) {
120 if(destlen) *destlen=0;
123 fseek(fi, 4, SEEK_CUR);
126 fseek(fi, len+4, SEEK_CUR);
131 unsigned int png_get_dword(FILE*fi)
135 return REVERSESWAP32(a);
146 int png_read_header(FILE*fi, struct png_header*header)
151 U8 head[8] = {137,80,78,71,13,10,26,10};
155 if(strncmp(head,head2,4))
158 while(png_read_chunk(&id, &len, &data, fi))
161 printf("%c%c%c%c %d\n", id[0],id[1],id[2],id[3],len);
162 if(!strncasecmp(id, "IHDR", 4)) {
165 header->width = REVERSESWAP32(*(U32*)&data[0]);
166 header->height = REVERSESWAP32(*(U32*)&data[4]);
167 a = data[8]; // should be 8
168 b = data[9]; // should be 3(indexed) or 2(rgb)
170 c = data[10]; // compression mode (0)
171 f = data[11]; // filter mode (0)
172 i = data[12]; // interlace mode (0)
174 if(VERBOSE(2)) printf("image mode:%d\n", b);
175 if(VERBOSE(2)) printf("bpp: %d\n", a);
176 if(VERBOSE(2)) printf("compression: %d\n", c);
177 if(VERBOSE(2)) printf("filter: %d\n", f);
178 if(VERBOSE(2)) printf("interlace: %d\n", i);
180 if(b!=0 && b!=2 && b!=3 && b!=6) {
181 fprintf(stderr, "Image mode %d not supported!\n", b);
183 fprintf(stderr, "(This is a grayscale image with alpha channel-\n");
184 fprintf(stderr, " try converting it into an RGB image with alpha channel)\n");
188 if(a!=8 && (b==2 || b==6)) {
189 fprintf(stderr, "Bpp %d in mode %d not supported!\n", a);
193 fprintf(stderr, "Compression mode %d not supported!\n", c);
197 fprintf(stderr, "Filter mode %d not supported!\n", f);
201 fprintf(stderr, "Interlace mode %d not supported!\n", i);
205 printf("%dx%d %d %d %d %d %d\n",header->width, header->height, a,b,c,f,i);
216 typedef unsigned char byte;
217 #define ABS(a) ((a)>0?(a):(-(a)))
218 byte inline PaethPredictor (byte a,byte b,byte c)
220 // a = left, b = above, c = upper left
221 int p = a + b - c; // initial estimate
222 int pa = ABS(p - a); // distances to a, b, c
225 // return nearest of a,b,c,
226 // breaking ties in order a,b,c.
227 if (pa <= pb && pa <= pc)
234 void applyfilter3(int mode, U8*src, U8*old, U8*dest, int width)
237 unsigned char lastr=0;
238 unsigned char lastg=0;
239 unsigned char lastb=0;
240 unsigned char upperlastr=0;
241 unsigned char upperlastg=0;
242 unsigned char upperlastb=0;
245 for(x=0;x<width;x++) {
255 for(x=0;x<width;x++) {
257 dest[1] = src[0]+lastr;
258 dest[2] = src[1]+lastg;
259 dest[3] = src[2]+lastb;
268 for(x=0;x<width;x++) {
270 dest[1] = src[0]+old[1];
271 dest[2] = src[1]+old[2];
272 dest[3] = src[2]+old[3];
279 for(x=0;x<width;x++) {
281 dest[1] = src[0]+(old[1]+lastr)/2;
282 dest[2] = src[1]+(old[2]+lastg)/2;
283 dest[3] = src[2]+(old[3]+lastb)/2;
293 for(x=0;x<width;x++) {
295 dest[1] = src[0]+PaethPredictor(lastr,old[1],upperlastr);
296 dest[2] = src[1]+PaethPredictor(lastg,old[2],upperlastg);
297 dest[3] = src[2]+PaethPredictor(lastb,old[3],upperlastb);
312 void applyfilter4(int mode, U8*src, U8*old, U8*dest, int width)
315 unsigned char lastr=0;
316 unsigned char lastg=0;
317 unsigned char lastb=0;
318 unsigned char lasta=0; //TODO: 255?
319 unsigned char upperlastr=0;
320 unsigned char upperlastg=0;
321 unsigned char upperlastb=0;
322 unsigned char upperlasta=0; //TODO: 255?
325 for(x=0;x<width;x++) {
335 for(x=0;x<width;x++) {
336 dest[0] = src[3]+lasta;
337 dest[1] = src[0]+lastr;
338 dest[2] = src[1]+lastg;
339 dest[3] = src[2]+lastb;
349 for(x=0;x<width;x++) {
350 dest[0] = src[3]+old[0];
351 dest[1] = src[0]+old[1];
352 dest[2] = src[1]+old[2];
353 dest[3] = src[2]+old[3];
360 for(x=0;x<width;x++) {
361 dest[0] = src[3]+(old[0]+lasta)/2;
362 dest[1] = src[0]+(old[1]+lastr)/2;
363 dest[2] = src[1]+(old[2]+lastg)/2;
364 dest[3] = src[2]+(old[3]+lastb)/2;
375 for(x=0;x<width;x++) {
376 dest[0] = src[3]+PaethPredictor(lasta,old[0],upperlasta);
377 dest[1] = src[0]+PaethPredictor(lastr,old[1],upperlastr);
378 dest[2] = src[1]+PaethPredictor(lastg,old[2],upperlastg);
379 dest[3] = src[2]+PaethPredictor(lastb,old[3],upperlastb);
396 void applyfilter1(int mode, U8*src, U8*old, U8*dest, int width)
399 unsigned char last=0;
400 unsigned char upperlast=0;
403 for(x=0;x<width;x++) {
410 for(x=0;x<width;x++) {
418 for(x=0;x<width;x++) {
426 for(x=0;x<width;x++) {
427 *dest = *src+(*old+last)/2;
435 for(x=0;x<width;x++) {
436 *dest = *src+PaethPredictor(last,*old,upperlast);
447 TAG *MovieAddFrame(SWF * swf, TAG * t, char *sname, int id)
459 unsigned long int imagedatalen;
460 unsigned long int zimagedatalen=0;
464 int alphapalettelen = 0;
465 struct png_header header;
471 if ((fi = fopen(sname, "rb")) == NULL) {
473 fprintf(stderr, "Read access failed: %s\n", sname);
477 if(!png_read_header(fi, &header))
480 if(header.mode == 3 || header.mode == 0) bypp = 1;
482 if(header.mode == 2) bypp = 3;
484 if(header.mode == 6) bypp = 4;
487 imagedatalen = bypp * header.width * header.height + 65536;
488 imagedata = malloc(imagedatalen);
490 fseek(fi,8,SEEK_SET);
493 if(!png_read_chunk(&tagid, &len, &data, fi))
495 if(!strncmp(tagid, "IEND", 4)) {
498 if(!strncmp(tagid, "PLTE", 4)) {
501 data = 0; //don't free data
503 printf("%d colors in palette\n", palettelen);
505 if(!strncmp(tagid, "tRNS", 4)) {
506 if(header.mode == 3) {
508 alphapalettelen = len;
509 data = 0; //don't free data
511 printf("found %d alpha colors\n", alphapalettelen);
514 if(!strncmp(tagid, "IDAT", 4)) {
517 zimagedata = malloc(len);
518 memcpy(zimagedata,data,len);
520 zimagedata = realloc(zimagedata, zimagedatalen+len);
521 memcpy(&zimagedata[zimagedatalen], data, len);
522 zimagedatalen += len;
529 if(!zimagedata || uncompress(imagedata, &imagedatalen, zimagedata, zimagedatalen) != Z_OK) {
530 fprintf(stderr, "Couldn't uncompress %s!\n", sname);
538 t = swf_InsertTag(t, ST_DEFINEBITSLOSSLESS2);
540 t = swf_InsertTag(t, ST_DEFINEBITSLOSSLESS);
542 swf_SetU16(t, id); // id
543 if(header.mode == 2 || header.mode == 6) {
544 U8*data2 = malloc(header.width*header.height*4);
550 int semitransparent=0;
551 /* in case for mode 2, the following also performs 24->32 bit conversion */
552 unsigned char* firstline = malloc(header.width*4);
554 for(y=0;y<header.height;y++) {
555 int mode = imagedata[pos++]; //filter mode
559 dest = &data2[(y*header.width)*4];
563 /* one byte per pixel */
564 src = &imagedata[pos];
565 pos+=header.width*(header.mode==6?4:3);
567 /* not implemented yet */
573 memset(old, 0, header.width*4); //TODO: fill alpha with 255?
575 old = &data2[(y-1)*header.width*4];
578 applyfilter4(mode, src, old, dest, header.width);
579 else if(header.mode==2)
580 applyfilter3(mode, src, old, dest, header.width);
584 /* the image is now compressed and stored in data. Now let's take
585 a look at the alpha values */
586 if(header.mode == 6) {
587 for(y=0;y<header.height;y++) {
588 U8*l = &data2[(y*header.width)*4];
589 for(x=0;x<header.width;x++) {
594 if(a==255) transparent++;
597 else semitransparent++;
598 l[x*4+3]=(int)r*a/255;
599 l[x*4+2]=(int)g*a/255;
600 l[x*4+1]=(int)b*a/255;
604 if(semitransparent || opaque) {
605 t->id = ST_DEFINEBITSLOSSLESS2;
608 swf_SetLosslessBits(t, header.width, header.height, data2, BMF_32BIT);
610 } else if(header.mode == 0 || header.mode == 3) {
612 int swf_width = BYTES_PER_SCANLINE(header.width);
613 U8*data2 = malloc(swf_width*header.height);
614 U8*tmpline = malloc(header.width);
617 if(header.mode == 3) { // palette or grayscale?
618 rgba = (RGBA*)malloc(palettelen*sizeof(RGBA));
620 fprintf(stderr, "Error: No palette found!\n");
623 /* 24->32 bit conversion */
624 for(i=0;i<palettelen;i++) {
625 rgba[i].r = palette[i*3+0];
626 rgba[i].g = palette[i*3+1];
627 rgba[i].b = palette[i*3+2];
628 if(alphapalette && i<alphapalettelen) {
629 rgba[i].a = alphapalette[i];
630 rgba[i].r = ((int)rgba[i].r*rgba[i].a)/255;
631 rgba[i].g = ((int)rgba[i].g*rgba[i].a)/255;
632 rgba[i].b = ((int)rgba[i].b*rgba[i].a)/255;
638 int mult = (0x1ff>>header.bpp);
639 palettelen = 1<<header.bpp;
640 rgba = (RGBA*)malloc(palettelen*sizeof(RGBA));
641 for(i=0;i<palettelen;i++) {
648 for(y=0;y<header.height;y++) {
649 int mode = imagedata[pos++]; //filter mode
651 U8*dest = &data2[y*swf_width];
653 src = &imagedata[pos];
654 if(header.bpp == 8) {
659 U32 v = (1<<header.bpp)-1;
660 for(x=0;x<header.width;x++) {
661 U32 r = src[s/8]<<8 |
664 tmpline[x] = (r>>(16-header.bpp-(s&7)))&v;
668 pos+=(header.width*header.bpp+7)/8;
672 memset(data2,0,swf_width);
673 old = &data2[y*swf_width];
675 old = &data2[(y-1)*swf_width];
677 applyfilter1(mode, src, old, dest, header.width);
679 swf_SetLosslessBitsIndexed(t, header.width, header.height, data2, rgba, palettelen);
685 t = swf_InsertTag(t, ST_DEFINESHAPE3);
688 swf_GetMatrix(NULL, &m);
691 fs = swf_ShapeAddBitmapFillStyle(s, &m, id, 0);
693 swf_SetU16(t, id + 1); // id
696 r.xmax = header.width * 20;
697 r.ymax = header.height * 20;
700 swf_SetShapeHeader(t, s);
702 swf_ShapeSetAll(t, s, 0, 0, 0, fs, 0);
703 swf_ShapeSetLine(t, s, r.xmax, 0);
704 swf_ShapeSetLine(t, s, 0, r.ymax);
705 swf_ShapeSetLine(t, s, -r.xmax, 0);
706 swf_ShapeSetLine(t, s, 0, -r.ymax);
710 t = swf_InsertTag(t, ST_REMOVEOBJECT2);
711 swf_SetU16(t, 50); // depth
713 t = swf_InsertTag(t, ST_PLACEOBJECT2);
715 swf_GetMatrix(NULL, &m);
716 m.tx = (swf->movieSize.xmax - (int) header.width * 20) / 2;
717 m.ty = (swf->movieSize.ymax - (int) header.height * 20) / 2;
718 swf_ObjectPlace(t, id + 1, 50, &m, NULL, NULL);
720 t = swf_InsertTag(t, ST_SHOWFRAME);
728 int CheckInputFile(char *fname, char **realname)
731 char *s = malloc(strlen(fname) + 5);
732 struct png_header head;
739 // Check whether file exists (with typical extensions)
741 if ((fi = fopen(s, "rb")) == NULL) {
742 sprintf(s, "%s.png", fname);
743 if ((fi = fopen(s, "rb")) == NULL) {
744 sprintf(s, "%s.PNG", fname);
745 if ((fi = fopen(s, "rb")) == NULL) {
746 sprintf(s, "%s.Png", fname);
747 if ((fi = fopen(s, "rb")) == NULL)
748 fprintf(stderr, "Couldn't open %s!\n", fname);
754 if(!png_read_header(fi, &head)) {
755 fprintf(stderr, "%s is not a PNG file!\n", fname);
759 if (global.max_image_width < head.width)
760 global.max_image_width = head.width;
761 if (global.max_image_height < head.height)
762 global.max_image_height = head.height;
769 int args_callback_option(char *arg, char *val)
778 global.framerate = atof(val);
779 if ((global.framerate < 1.0/256) ||(global.framerate >= 256.0)) {
782 "Error: You must specify a valid framerate between 1/256 and 255.\n");
790 global.outfile = val;
805 global.verbose = atoi(val);
811 global.force_width = atoi(val);
817 global.force_height = atoi(val);
822 printf("png2swf - part of %s %s\n", PACKAGE, VERSION);
832 fprintf(stderr, "Unknown option: -%s\n", arg);
839 static struct options_t options[] = {
851 int args_callback_longoption(char *name, char *val)
853 return args_long2shortoption(options, name, val);
856 int args_callback_command(char *arg, char *next) // actually used as filename
859 if (CheckInputFile(arg, &s) < 0) {
861 fprintf(stderr, "Error opening input file: %s\n", arg);
864 image[global.nfiles].filename = s;
866 if (global.nfiles >= MAX_INPUT_FILES) {
868 fprintf(stderr, "Error: Too many input files.\n");
875 void args_callback_usage(char *name)
878 printf("Usage: %s [-X width] [-Y height] [-o file.swf] [-r rate] file1.png [file2.png...]\n", name);
880 printf("-r , --rate <framerate> Set movie framerate (frames per second)\n");
881 printf("-o , --output <filename> Set name for SWF output file.\n");
882 printf("-z , --zlib <zlib> Enable Flash 6 (MX) Zlib Compression\n");
883 printf("-X , --pixel <width> Force movie width to <width> (default: autodetect)\n");
884 printf("-Y , --pixel <height> Force movie height to <height> (default: autodetect)\n");
885 printf("-v , --verbose <level> Set verbose level (0=quiet, 1=default, 2=debug)\n");
886 printf("-C , --cgi For use as CGI- prepend http header, write to stdout\n");
887 printf("-V , --version Print version information and exit\n");
891 int main(int argc, char **argv)
896 memset(&global, 0x00, sizeof(global));
898 global.framerate = 1.0;
902 processargs(argc, argv);
904 if(global.nfiles<=0) {
905 fprintf(stderr, "No png files found in arguments\n");
910 fprintf(stderr, "Processing %i file(s)...\n", global.nfiles);
912 t = MovieStart(&swf, global.framerate,
913 global.force_width ? global.force_width : global.
915 global.force_height ? global.force_height : global.
920 for (i = 0; i < global.nfiles; i++) {
922 fprintf(stderr, "[%03i] %s\n", i,
924 t = MovieAddFrame(&swf, t, image[i].filename, (i * 2) + 1);
925 free(image[i].filename);
929 MovieFinish(&swf, t, global.outfile);