3 PNG to SWF converter tool
5 Part of the swftools package.
7 Copyright (c) 2002 Matthias Kramm <kramm@quiss.org>
9 This file is distributed under the GPL, see file COPYING for details
17 #include "../lib/rfxswf.h"
18 #include "../lib/args.h"
20 #define MAX_INPUT_FILES 1024
21 #define VERBOSE(x) (global.verbose>=x)
36 } image[MAX_INPUT_FILES];
38 TAG *MovieStart(SWF * swf, int framerate, int dx, int dy)
43 memset(swf, 0x00, sizeof(SWF));
46 swf->frameRate = (25600 / framerate);
47 swf->movieSize.xmax = dx * 20;
48 swf->movieSize.ymax = dy * 20;
50 t = swf->firstTag = swf_InsertTag(NULL, ST_SETBACKGROUNDCOLOR);
52 rgb.r = rgb.g = rgb.b = rgb.a = 0x00;
58 int MovieFinish(SWF * swf, TAG * t, char *sname)
60 int handle, so = fileno(stdout);
61 t = swf_InsertTag(t, ST_END);
63 if ((!isatty(so)) && (!sname))
68 handle = open(sname, O_RDWR | O_CREAT | O_TRUNC, 0666);
71 (swf_WriteSWF(handle, swf)) if (VERBOSE(1))
72 fprintf(stderr, "Unable to write output file: %s\n", sname);
80 int png_read_chunk(char (*head)[4], int*destlen, U8**destdata, FILE*fi)
83 if(destlen) *destlen=0;
84 if(destdata) *destdata=0;
85 if(!fread(&len, 4, 1, fi))
87 if(!fread(head, 4, 1, fi))
89 len = REVERSESWAP32(len);
90 printf("id: %.4s len: %d\n", head, len);
91 if(destlen) *destlen = len;
94 *destdata = malloc(len);
97 if(!fread(*destdata, len, 1, fi)) {
99 if(destlen) *destlen=0;
102 fseek(fi, 4, SEEK_CUR);
105 fseek(fi, len+4, SEEK_CUR);
110 unsigned int png_get_dword(FILE*fi)
114 return REVERSESWAP32(a);
125 int png_read_header(FILE*fi, struct png_header*header)
129 U8 head[8] = {137,80,78,71,13,10,26,10};
133 if(strncmp(head,head2,4))
136 while(png_read_chunk(&id, &len, &data, fi))
138 printf("%c%c%c%c %d\n", id[0],id[1],id[2],id[3],len);
139 if(!strncasecmp(id, "IHDR", 4)) {
142 header->width = REVERSESWAP32(*(U32*)&data[0]);
143 header->height = REVERSESWAP32(*(U32*)&data[4]);
144 a = data[8]; // should be 8
145 b = data[9]; // should be 3(indexed) or 2(rgb)
147 c = data[10]; // compression mode (0)
148 f = data[11]; // filter mode (0)
149 i = data[12]; // interlace mode (0)
151 fprintf(stderr, "Compression mode %d not supported!\n", c);
155 fprintf(stderr, "Filter mode %d not supported!\n", f);
159 fprintf(stderr, "Interlace mode %d not supported!\n", i);
162 printf("%dx%d %d %d %d %d %d\n",header->width, header->height, a,b,c,f,i);
167 fseek(fi, len, SEEK_CUR);
174 typedef unsigned char byte;
175 #define ABS(a) ((a)>0?(a):(-(a)))
176 byte inline PaethPredictor (byte a,byte b,byte c)
178 // a = left, b = above, c = upper left
179 int p = a + b - c; // initial estimate
180 int pa = ABS(p - a); // distances to a, b, c
183 // return nearest of a,b,c,
184 // breaking ties in order a,b,c.
185 if (pa <= pb && pa <= pc)
192 void applyfilter(int mode, U8*src, U8*old, U8*dest, int width)
195 unsigned char lastr=0;
196 unsigned char lastg=0;
197 unsigned char lastb=0;
198 unsigned char upperlastr=0;
199 unsigned char upperlastg=0;
200 unsigned char upperlastb=0;
203 for(x=0;x<width;x++) {
213 for(x=0;x<width;x++) {
215 dest[1] = src[0]+lastr;
216 dest[2] = src[1]+lastg;
217 dest[3] = src[2]+lastb;
226 for(x=0;x<width;x++) {
228 dest[1] = src[0]+old[1];
229 dest[2] = src[1]+old[2];
230 dest[3] = src[2]+old[3];
237 for(x=0;x<width;x++) {
239 dest[1] = src[0]+(old[1]+lastr)/2;
240 dest[2] = src[1]+(old[2]+lastg)/2;
241 dest[3] = src[2]+(old[3]+lastb)/2;
251 for(x=0;x<width;x++) {
253 dest[1] = src[0]+PaethPredictor(lastr,old[1],upperlastr);
254 dest[2] = src[1]+PaethPredictor(lastg,old[2],upperlastg);
255 dest[3] = src[2]+PaethPredictor(lastb,old[3],upperlastb);
270 TAG *MovieAddFrame(SWF * swf, TAG * t, char *sname, int id)
281 unsigned long int imagedatalen;
284 struct png_header header;
290 if ((fi = fopen(sname, "rb")) == NULL) {
292 fprintf(stderr, "Read access failed: %s\n", sname);
296 if(!png_read_header(fi, &header))
299 if(header.mode == 3) bypp = 1;
301 if(header.mode == 2) bypp = 3;
304 imagedatalen = bypp * header.width * header.height + 65536;
305 imagedata = malloc(imagedatalen);
307 fseek(fi,8,SEEK_SET);
310 if(!png_read_chunk(&tagid, &len, &data, fi))
312 if(!strncmp(tagid, "IEND", 4)) {
315 if(!strncmp(tagid, "PLTE", 4)) {
319 printf("%d palette\n", len);
321 if(!strncmp(tagid, "IDAT", 4)) {
322 if(uncompress(imagedata, &imagedatalen, data, len) != Z_OK) {
323 fprintf(stderr, "Couldn't uncompress %s!\n", sname);
326 printf("IDAT %d -> %d\n", len, imagedatalen);
332 t = swf_InsertTag(t, ST_DEFINEBITSLOSSLESS);
333 swf_SetU16(t, id); // id
334 if(header.mode == 2) {
335 U8*data2 = malloc(header.width*header.height*4);
339 /* 24->32 bit conversion */
340 for(y=0;y<header.height;y++) {
341 int mode = imagedata[pos++]; //filter mode
343 U8*src = &imagedata[pos];
344 U8*dest = &data2[(y*header.width)*4];
347 memset(data2,0,header.width*4);
348 old = &data2[y*header.width*4];
350 old = &data2[(y-1)*header.width*4];
352 applyfilter(mode, src, old, dest, header.width);
355 swf_SetLosslessBits(t, header.width, header.height, data2, BMF_32BIT);
359 RGBA*rgba = (RGBA*)malloc(palettelen*sizeof(RGBA));
360 U8*data2 = malloc((header.width+4)*header.height);
364 fprintf(stderr, "Error: No palette found!\n");
367 /* 24->32 bit conversion */
368 for(i=0;i<palettelen;i++) {
369 rgba[i].r = palette[i*3+0];
370 rgba[i].g = palette[i*3+1];
371 rgba[i].b = palette[i*3+2];
374 for(y=0;y<header.height;y++) {
375 int mode = imagedata[pos];
377 fprintf(stderr, "Warning: Filter mode %d\n", mode);
380 for(x=0;x<header.width;x++) {
381 data2[y*header.width+x] =
385 swf_SetLosslessBitsIndexed(t, header.width, header.height, data2, rgba, palettelen);
390 t = swf_InsertTag(t, ST_DEFINESHAPE);
393 swf_GetMatrix(NULL, &m);
396 fs = swf_ShapeAddBitmapFillStyle(s, &m, id, 0);
398 swf_SetU16(t, id + 1); // id
401 r.xmax = header.width * 20;
402 r.ymax = header.height * 20;
405 swf_SetShapeHeader(t, s);
407 swf_ShapeSetAll(t, s, 0, 0, 0, fs, 0);
408 swf_ShapeSetLine(t, s, r.xmax, 0);
409 swf_ShapeSetLine(t, s, 0, r.ymax);
410 swf_ShapeSetLine(t, s, -r.xmax, 0);
411 swf_ShapeSetLine(t, s, 0, -r.ymax);
415 t = swf_InsertTag(t, ST_REMOVEOBJECT2);
416 swf_SetU16(t, 1); // depth
418 t = swf_InsertTag(t, ST_PLACEOBJECT2);
420 swf_GetMatrix(NULL, &m);
421 m.tx = (swf->movieSize.xmax - (int) header.width * 20) / 2;
422 m.ty = (swf->movieSize.ymax - (int) header.height * 20) / 2;
423 swf_ObjectPlace(t, id + 1, 1, &m, NULL, NULL);
425 t = swf_InsertTag(t, ST_SHOWFRAME);
433 int CheckInputFile(char *fname, char **realname)
436 char *s = malloc(strlen(fname) + 5);
437 struct png_header head;
444 // Check whether file exists (with typical extensions)
446 if ((fi = fopen(s, "rb")) == NULL) {
447 sprintf(s, "%s.png", fname);
448 if ((fi = fopen(s, "rb")) == NULL) {
449 sprintf(s, "%s.PNG", fname);
450 if ((fi = fopen(s, "rb")) == NULL) {
451 sprintf(s, "%s.Png", fname);
452 if ((fi = fopen(s, "rb")) == NULL)
453 fprintf(stderr, "Couldn't open %s!\n", fname);
459 if(!png_read_header(fi, &head)) {
460 fprintf(stderr, "%s is not a PNG file!\n", fname);
463 if(head.mode!=2 && head.mode!=3) {
464 fprintf(stderr, "%s has unsupported mode %d\n", head.mode);
468 fprintf(stderr, "%s has unsupported bpp %d\n", head.bpp);
472 if (global.max_image_width < head.width)
473 global.max_image_width = head.width;
474 if (global.max_image_height < head.height)
475 global.max_image_height = head.height;
482 int args_callback_option(char *arg, char *val)
491 global.framerate = atoi(val);
492 if ((global.framerate < 1) ||(global.framerate > 5000)) {
495 "Error: You must specify a valid framerate between 1 and 10000.\n");
503 global.outfile = val;
509 global.verbose = atoi(val);
515 global.force_width = atoi(val);
521 global.force_height = atoi(val);
526 printf("png2swf - part of %s %s\n", PACKAGE, VERSION);
536 fprintf(stderr, "Unknown option: -%s\n", arg);
543 struct options_t options[] =
553 int args_callback_longoption(char *name, char *val)
555 return args_long2shortoption(options, name, val);
558 int args_callback_command(char *arg, char *next) // actually used as filename
561 if (CheckInputFile(arg, &s) < 0) {
563 fprintf(stderr, "Error opening input file: %s\n", arg);
566 image[global.nfiles].filename = s;
568 if (global.nfiles >= MAX_INPUT_FILES) {
570 fprintf(stderr, "Error: Too many input files.\n");
577 void args_callback_usage(char *name)
579 printf("Usage: %s [-options [value]] imagefiles[.png] [...]\n", name);
580 printf("-r framerate (rate) Set movie framerate (100/sec)\n");
581 printf("-o outputfile (output) Set name for SWF output file\n");
582 printf("-X pixel (width) Force movie width to pixel (default: autodetect)\n");
583 printf("-Y pixel (height) Force movie height to pixel (default: autodetect)\n");
584 printf("-v level (verbose) Set verbose level (0=quiet, 1=default, 2=debug)\n");
585 printf("-V (version) Print version information and exit\n");
589 int main(int argc, char **argv)
594 memset(&global, 0x00, sizeof(global));
596 global.framerate = 100;
599 processargs(argc, argv);
602 fprintf(stderr, "Processing %i file(s)...\n", global.nfiles);
604 t = MovieStart(&swf, global.framerate,
605 global.force_width ? global.force_width : global.
607 global.force_height ? global.force_height : global.
612 for (i = 0; i < global.nfiles; i++) {
614 fprintf(stderr, "[%03i] %s\n", i,
616 t = MovieAddFrame(&swf, t, image[i].filename, (i * 2) + 1);
617 free(image[i].filename);
621 MovieFinish(&swf, t, global.outfile);