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`mutool convert` that print to stdout. [`mutool`](https://mupdf.com) converts pdf to plain text. However, it always write to a file. This simple C code convert pdf to text and write to stdout instead.
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| brew update | |
| brew install mupdf | |
| # Modify the MUPDF_VERSION in Makefile according to the installed version. | |
| make | |
| # Usage: ./muconvert_stdout <PDF-FILE> |
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| CC = clang | |
| MUPDF_VERSION = 1.23.11 | |
| CFLAGS = -Wall -O3 \ | |
| -I/usr/local/Cellar/mupdf/$(MUPDF_VERSION)/include \ | |
| -L/usr/local/Cellar/mupdf/$(MUPDF_VERSION)/lib \ | |
| -lmupdf-third -lmupdf | |
| muconvert_stdout: muconvert_stdout.c | |
| $(CC) $(CFLAGS) -o $@ $< |
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| #include <mupdf/fitz.h> | |
| #include <stdio.h> | |
| #include <stdlib.h> | |
| /* input options */ | |
| static const char *password = ""; | |
| static int alphabits = 8; | |
| static float layout_w = FZ_DEFAULT_LAYOUT_W; | |
| static float layout_h = FZ_DEFAULT_LAYOUT_H; | |
| static float layout_em = FZ_DEFAULT_LAYOUT_EM; | |
| static char *layout_css = NULL; | |
| static int layout_use_doc_css = 1; | |
| /* output options */ | |
| static const char *format = "text"; | |
| static const char *options = ""; | |
| static fz_context *ctx; | |
| static fz_document *doc; | |
| static fz_document_writer *out; | |
| static fz_box_type page_box = FZ_CROP_BOX; | |
| static int count; | |
| static void runpage(int number) | |
| { | |
| fz_rect box; | |
| fz_page *page; | |
| fz_device *dev = NULL; | |
| fz_matrix ctm; | |
| page = fz_load_page(ctx, doc, number - 1); | |
| fz_var(dev); | |
| fz_try(ctx) | |
| { | |
| box = fz_bound_page_box(ctx, page, page_box); | |
| // Realign page box on 0,0 | |
| ctm = fz_translate(-box.x0, -box.y0); | |
| box = fz_transform_rect(box, ctm); | |
| dev = fz_begin_page(ctx, out, box); | |
| fz_run_page(ctx, page, dev, ctm, NULL); | |
| fz_end_page(ctx, out); | |
| } | |
| fz_always(ctx) | |
| { | |
| fz_drop_page(ctx, page); | |
| } | |
| fz_catch(ctx) | |
| fz_rethrow(ctx); | |
| } | |
| static void runrange(const char *range) | |
| { | |
| int start, end, i; | |
| while ((range = fz_parse_page_range(ctx, range, &start, &end, count))) | |
| { | |
| if (start < end) | |
| for (i = start; i <= end; ++i) | |
| runpage(i); | |
| else | |
| for (i = start; i >= end; --i) | |
| runpage(i); | |
| } | |
| } | |
| int main(int argc, char **argv) | |
| { | |
| int i; | |
| int retval = EXIT_SUCCESS; | |
| ctx = fz_new_context(NULL, NULL, FZ_STORE_UNLIMITED); | |
| if (!ctx) { | |
| fprintf(stderr, "cannot create mupdf context\n"); | |
| return EXIT_FAILURE; | |
| } | |
| fz_try(ctx) | |
| fz_register_document_handlers(ctx); | |
| fz_catch(ctx) | |
| { | |
| // fz_report_error(ctx); | |
| fprintf(stderr, "cannot register document handlers\n"); | |
| fz_drop_context(ctx); | |
| return EXIT_FAILURE; | |
| } | |
| fz_set_aa_level(ctx, alphabits); | |
| if (layout_css) | |
| { | |
| fz_buffer *buf = fz_read_file(ctx, layout_css); | |
| fz_set_user_css(ctx, fz_string_from_buffer(ctx, buf)); | |
| fz_drop_buffer(ctx, buf); | |
| } | |
| fz_set_use_document_css(ctx, layout_use_doc_css); | |
| fz_try(ctx) | |
| out = fz_new_text_writer_with_output(ctx, format, fz_stdout(ctx), options); | |
| fz_catch(ctx) | |
| { | |
| // fz_report_error(ctx); | |
| fprintf(stderr, "cannot create document\n"); | |
| fz_drop_context(ctx); | |
| return EXIT_FAILURE; | |
| } | |
| fz_var(doc); | |
| fz_try(ctx) | |
| { | |
| for (i = 1; i < argc; ++i) | |
| { | |
| doc = fz_open_document(ctx, argv[i]); | |
| if (fz_needs_password(ctx, doc)) | |
| if (!fz_authenticate_password(ctx, doc, password)) | |
| { | |
| // fz_throw(ctx, FZ_ERROR_ARGUMENT, "cannot authenticate password: %s", argv[i]); | |
| fprintf(stderr, "cannot authenticate password\n"); | |
| } | |
| fz_layout_document(ctx, doc, layout_w, layout_h, layout_em); | |
| count = fz_count_pages(ctx, doc); | |
| if (i+1 < argc && fz_is_page_range(ctx, argv[i+1])) | |
| runrange(argv[++i]); | |
| else | |
| runrange("1-N"); | |
| fz_drop_document(ctx, doc); | |
| doc = NULL; | |
| } | |
| fz_close_document_writer(ctx, out); | |
| } | |
| fz_always(ctx) | |
| { | |
| fz_drop_document(ctx, doc); | |
| fz_drop_document_writer(ctx, out); | |
| } | |
| fz_catch(ctx) | |
| { | |
| // fz_report_error(ctx); | |
| retval = EXIT_FAILURE; | |
| } | |
| fz_drop_context(ctx); | |
| return retval; | |
| } |
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