- char tagid[4];
- int len;
- U8*data;
- U8*imagedata;
- unsigned long int imagedatalen;
- U8*palette = 0;
- int palettelen = 0;
- struct png_header header;
- int bypp;
-
- FILE *fi;
- U8 *scanline;
-
- if ((fi = fopen(sname, "rb")) == NULL) {
- if (VERBOSE(1))
- fprintf(stderr, "Read access failed: %s\n", sname);
- return t;
- }
-
- if(!png_read_header(fi, &header))
- return 0;
-
- if(header.mode == 3) bypp = 1;
- else
- if(header.mode == 2) bypp = 3;
- else
- return 0;
- imagedatalen = bypp * header.width * header.height + 65536;
- imagedata = malloc(imagedatalen);
-
- fseek(fi,8,SEEK_SET);
- while(!feof(fi))
- {
- if(!png_read_chunk(&tagid, &len, &data, fi))
- break;
- if(!strncmp(tagid, "IEND", 4)) {
- break;
- }
- if(!strncmp(tagid, "PLTE", 4)) {
- palette = data;
- palettelen = len/3;
- data = 0;
- if(VERBOSE(2))
- printf("%d colors in palette\n", palettelen);
- }
- if(!strncmp(tagid, "IDAT", 4)) {
- if(uncompress(imagedata, &imagedatalen, data, len) != Z_OK) {
- fprintf(stderr, "Couldn't uncompress %s!\n", sname);
- return 0;
- }
- }
- if(data)
- free(data);
- }
- t = swf_InsertTag(t, ST_DEFINEBITSLOSSLESS);
- swf_SetU16(t, id); // id
- if(header.mode == 2) {
- U8*data2 = malloc(header.width*header.height*4);
- int i,s=0;
- int x,y;
- int pos=0;
- /* 24->32 bit conversion */
- for(y=0;y<header.height;y++) {
- int mode = imagedata[pos++]; //filter mode
- U8*src;
- U8*dest;
- U8*old;
- dest = &data2[(y*header.width)*4];
-
- if(header.bpp == 8)
- {
- /* one byte per pixel */
- src = &imagedata[pos];
- pos+=header.width*3;
- } else {
- /* not implemented yet */
- exit(1);
- }