diff options
Diffstat (limited to 'apps/mupdfextract.c')
| -rw-r--r-- | apps/mupdfextract.c | 215 |
1 files changed, 215 insertions, 0 deletions
diff --git a/apps/mupdfextract.c b/apps/mupdfextract.c new file mode 100644 index 00000000..1407f7f3 --- /dev/null +++ b/apps/mupdfextract.c @@ -0,0 +1,215 @@ +/* + * pdfextract -- the ultimate way to extract images and fonts from pdfs + */ + +#include "fitz.h" +#include "mupdf.h" + +static pdf_document *doc = NULL; +static fz_context *ctx = NULL; +static int dorgb = 0; + +static void usage(void) +{ + fprintf(stderr, "usage: pdfextract [options] file.pdf [object numbers]\n"); + fprintf(stderr, "\t-p\tpassword\n"); + fprintf(stderr, "\t-r\tconvert images to rgb\n"); + exit(1); +} + +static int isimage(fz_obj *obj) +{ + fz_obj *type = fz_dict_gets(obj, "Subtype"); + return fz_is_name(type) && !strcmp(fz_to_name(type), "Image"); +} + +static int isfontdesc(fz_obj *obj) +{ + fz_obj *type = fz_dict_gets(obj, "Type"); + return fz_is_name(type) && !strcmp(fz_to_name(type), "FontDescriptor"); +} + +static void saveimage(int num) +{ + fz_pixmap *img; + fz_obj *ref; + char name[1024]; + + ref = fz_new_indirect(ctx, num, 0, doc); + + /* TODO: detect DCTD and save as jpeg */ + + img = pdf_load_image(doc, ref); + + if (dorgb && img->colorspace && img->colorspace != fz_device_rgb) + { + fz_pixmap *temp; + temp = fz_new_pixmap_with_rect(ctx, fz_device_rgb, fz_bound_pixmap(img)); + fz_convert_pixmap(ctx, img, temp); + fz_drop_pixmap(ctx, img); + img = temp; + } + + if (img->n <= 4) + { + sprintf(name, "img-%04d.png", num); + printf("extracting image %s\n", name); + fz_write_png(ctx, img, name, 0); + } + else + { + sprintf(name, "img-%04d.pam", num); + printf("extracting image %s\n", name); + fz_write_pam(ctx, img, name, 0); + } + + fz_drop_pixmap(ctx, img); + fz_drop_obj(ref); +} + +static void savefont(fz_obj *dict, int num) +{ + char name[1024]; + char *subtype; + fz_buffer *buf; + fz_obj *stream = NULL; + fz_obj *obj; + char *ext = ""; + FILE *f; + char *fontname = "font"; + int n; + + obj = fz_dict_gets(dict, "FontName"); + if (obj) + fontname = fz_to_name(obj); + + obj = fz_dict_gets(dict, "FontFile"); + if (obj) + { + stream = obj; + ext = "pfa"; + } + + obj = fz_dict_gets(dict, "FontFile2"); + if (obj) + { + stream = obj; + ext = "ttf"; + } + + obj = fz_dict_gets(dict, "FontFile3"); + if (obj) + { + stream = obj; + + obj = fz_dict_gets(obj, "Subtype"); + if (obj && !fz_is_name(obj)) + fz_throw(ctx, "Invalid font descriptor subtype"); + + subtype = fz_to_name(obj); + if (!strcmp(subtype, "Type1C")) + ext = "cff"; + else if (!strcmp(subtype, "CIDFontType0C")) + ext = "cid"; + else + fz_throw(ctx, "Unhandled font type '%s'", subtype); + } + + if (!stream) + { + fz_warn(ctx, "Unhandled font type"); + return; + } + + buf = pdf_load_stream(doc, fz_to_num(stream), fz_to_gen(stream)); + + sprintf(name, "%s-%04d.%s", fontname, num, ext); + printf("extracting font %s\n", name); + + f = fopen(name, "wb"); + if (!f) + fz_throw(ctx, "Error creating font file"); + + n = fwrite(buf->data, 1, buf->len, f); + if (n < buf->len) + fz_throw(ctx, "Error writing font file"); + + if (fclose(f) < 0) + fz_throw(ctx, "Error closing font file"); + + fz_drop_buffer(ctx, buf); +} + +static void showobject(int num) +{ + fz_obj *obj; + + if (!doc) + fz_throw(ctx, "no file specified"); + + obj = pdf_load_object(doc, num, 0); + + if (isimage(obj)) + saveimage(num); + else if (isfontdesc(obj)) + savefont(obj, num); + + fz_drop_obj(obj); +} + +#ifdef MUPDF_COMBINED_EXE +int pdfextract_main(int argc, char **argv) +#else +int main(int argc, char **argv) +#endif +{ + char *infile; + char *password = ""; + int c, o; + + while ((c = fz_getopt(argc, argv, "p:r")) != -1) + { + switch (c) + { + case 'p': password = fz_optarg; break; + case 'r': dorgb++; break; + default: usage(); break; + } + } + + if (fz_optind == argc) + usage(); + + infile = argv[fz_optind++]; + + ctx = fz_new_context(NULL, FZ_STORE_UNLIMITED); + if (!ctx) + { + fprintf(stderr, "cannot initialise context\n"); + exit(1); + } + + doc = pdf_open_document(ctx, infile); + if (pdf_needs_password(doc)) + if (!pdf_authenticate_password(doc, password)) + fz_throw(ctx, "cannot authenticate password: %s\n", infile); + + if (fz_optind == argc) + { + for (o = 0; o < doc->len; o++) + showobject(o); + } + else + { + while (fz_optind < argc) + { + showobject(atoi(argv[fz_optind])); + fz_optind++; + } + } + + pdf_close_document(doc); + fz_flush_warnings(ctx); + fz_free_context(ctx); + return 0; +} |