mupdf简化参数

于 2025-04-05 00:40:30 发布
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本文链接：https://blog.youkuaiyun.com/qq_55125921/article/details/147004980
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#include "mupdf/fitz.h"
#include "mupdf/pdf.h"

int main(int argc, char** ​argv)
{
	char* infile = "D:\\input.pdf";
	char* outfile = "D:\\out.pdf";
	char* password = "";

	pdf_clean_options opts = { 0 };
	opts.write = pdf_default_write_options;

	/* 设置所有可用的参数 */
	//opts.write.do_garbage = 4;          // -gggg
	//opts.write.do_linear = 1;           // -l

	//opts.write.do_compress = 1;         // -z
	//opts.write.do_compress_fonts = 1;   // -f
	//opts.write.do_compress_images = 1;  // -i

	//opts.write.compression_effort = 100; // -e 100
	//opts.write.do_clean = 1;            // -c
	//opts.write.do_sanitize = 1;         // -s

	//opts.write.do_appearance = 2;       // -AA
	//opts.write.do_preserve_metadata = 1; // -m
	//opts.write.do_use_objstms = 1;      // -Z

	//opts.write.do_pretty = 1;           // 自动启用（当-d或-a启用时）
	//opts.write.do_ascii = 1;            // -a
	//opts.write.do_encrypt = PDF_ENCRYPT_AES_256; // -E aes-256
	//opts.write.permissions = PDF_PERM_PRINT | PDF_PERM_COPY; // -P
	//opts.write.do_decompress = 1;       // -d

	//strcpy(opts.write.opwd_utf8, "ownerpass"); // -O
	//strcpy(opts.write.upwd_utf8, "userpass");  // -U

	opts.subset_fonts = 1;              // -S
	opts.structure = PDF_CLEAN_STRUCTURE_DROP; // --structure=keep

	/* 图像处理参数 */
	opts.image.color_lossy_image_subsample_method = 1; // average
	opts.image.color_lossless_image_subsample_method = 2; // bicubic
	opts.image.color_lossy_image_subsample_threshold = 150;
	opts.image.color_lossy_image_subsample_to = 300;
	opts.image.color_lossy_image_recompress_method = FZ_RECOMPRESS_JPEG;
	opts.image.color_lossy_image_recompress_quality = "90";

	/* 类似设置gray和bitonal图像参数... */

	// 灰度图像子采样方法（对应--gray-image-subsample-method）
	opts.image.gray_lossy_image_subsample_method = 1;      // 1=average平均采样
	//opts.image.gray_lossless_image_subsample_method = 2;   // 2=bicubic双三次插值

	// 子采样DPI阈值（对应--gray-image-subsample-dpi）
	opts.image.gray_lossy_image_subsample_threshold = 150;   // 有损压缩触发子采样的DPI阈值
	opts.image.gray_lossy_image_subsample_to = 300;          // 有损压缩目标DPI
	//opts.image.gray_lossless_image_subsample_threshold = 200;// 无损压缩触发阈值

	// 重新压缩方法（对应--gray-image-recompress-method）
	opts.image.gray_lossy_image_recompress_method = FZ_RECOMPRESS_JPEG;
	opts.image.gray_lossy_image_recompress_quality = "85";  // JPEG质量参数
	//opts.image.gray_lossless_image_recompress_method = FZ_RECOMPRESS_JPEG;

	// 二值图像子采样方法（对应--bitonal-image-subsample-method）
	opts.image.bitonal_image_subsample_method = 1;          // 仅支持average采样

	// 子采样DPI设置（对应--bitonal-image-subsample-dpi）
	opts.image.bitonal_image_subsample_threshold = 300;    // 默认扫描文档分辨率
	opts.image.bitonal_image_subsample_to = 400;           // 目标分辨率

	// 重新压缩方法（对应--bitonal-image-recompress-method）
	opts.image.bitonal_image_recompress_method = FZ_RECOMPRESS_FAX;
	opts.image.bitonal_image_recompress_quality = "90"; // JBIG2阈值参数

	fz_context* ctx = fz_new_context(NULL, NULL, FZ_STORE_UNLIMITED);
	if (!ctx) {
		fprintf(stderr, "cannot initialise context\n");
		return 1;
	}

	int errors = 0;
	fz_try(ctx) {
		pdf_clean_file(ctx, infile, outfile, password, &opts, 0, NULL);
	}
	fz_catch(ctx) {
		fz_report_error(ctx);
		errors++;
	}
	fz_drop_context(ctx);

	return errors != 0;
}

 Copyright (C) 2004-2024 Artifex Software, Inc.

 This file is part of MuPDF.

 MuPDF is free software: you can redistribute it and/or modify it under the
 terms of the GNU Affero General Public License as published by the Free
 Software Foundation, either version 3 of the License, or (at your option)
 any later version.

 MuPDF is distributed in the hope that it will be useful, but WITHOUT ANY
 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
 details.

 You should have received a copy of the GNU Affero General Public License
 along with MuPDF. If not, see <https://www.gnu.org/licenses/agpl-3.0.en.html>

 Alternative licensing terms are available from the licensor.
 For commercial licensing, see <https://www.artifex.com/> or contact
 Artifex Software, Inc., 39 Mesa Street, Suite 108A, San Francisco,
 CA 94129, USA, for further information.
//
///*
// * PDF cleaning tool: general purpose pdf syntax washer.
// *
// * Rewrite PDF with pretty printed objects.
// * Garbage collect unreachable objects.
// * Inflate compressed streams.
// * Create subset documents.
// *
// * TODO: linearize document for fast web view
// */
//
//#include "mupdf/fitz.h"
//#include "mupdf/pdf.h"
//
//#include <string.h>
//#include <stdlib.h>
//#include <stdio.h>
//
//static int usage(void)
//{
//	fprintf(stderr,
//		"usage: mutool clean [options] input.pdf [output.pdf] [pages]\n"
//		"\t-p -\tpassword\n"
//		"\t-g\tgarbage collect unused objects\n"
//		"\t-gg\tin addition to -g compact xref table\n"
//		"\t-ggg\tin addition to -gg merge duplicate objects\n"
//		"\t-gggg\tin addition to -ggg check streams for duplication\n"
//		"\t-l\tlinearize PDF\n"
//		"\t-D\tsave file without encryption\n"
//		"\t-E -\tsave file with new encryption (rc4-40, rc4-128, aes-128, or aes-256)\n"
//		"\t-O -\towner password (only if encrypting)\n"
//		"\t-U -\tuser password (only if encrypting)\n"
//		"\t-P -\tpermission flags (only if encrypting)\n"
//		"\t-a\tascii hex encode binary streams\n"
//		"\t-d\tdecompress streams\n"
//		"\t-z\tdeflate uncompressed streams\n"
//		"\t-e -\tcompression \"effort\" (0 = default, 1 = min, 100 = max)\n"
//		"\t-f\tcompress font streams\n"
//		"\t-i\tcompress image streams\n"
//		"\t-c\tclean content streams\n"
//		"\t-s\tsanitize content streams\n"
//		"\t-t\t'tighten' objects\n"
//		"\t-A\tcreate appearance streams for annotations\n"
//		"\t-AA\trecreate appearance streams for annotations\n"
//		"\t-m\tpreserve metadata\n"
//		"\t-S\tsubset fonts if possible [EXPERIMENTAL!]\n"
//		"\t-Z\tuse objstms if possible for extra compression\n"
//		"\t--{color,gray,bitonal}-{,lossy-,lossless-}image-subsample-method -\n\t\taverage, bicubic\n"
//		"\t--{color,gray,bitonal}-{,lossy-,lossless-}image-subsample-dpi -[,-]\n\t\tDPI at which to subsample [+ target dpi]\n"
//		"\t--{color,gray,bitonal}-{,lossy-,lossless-}image-recompress-method -[:quality]\n\t\tnever, same, lossless, jpeg, j2k, fax, jbig2\n"
//		"\t--structure=keep|drop\tKeep or drop the structure tree\n"
//		"\tpages\tcomma separated list of page numbers and ranges\n"
//		);
//	return 1;
//}
//
//static int encrypt_method_from_string(const char *name)
//{
//	if (!strcmp(name, "rc4-40")) return PDF_ENCRYPT_RC4_40;
//	if (!strcmp(name, "rc4-128")) return PDF_ENCRYPT_RC4_128;
//	if (!strcmp(name, "aes-128")) return PDF_ENCRYPT_AES_128;
//	if (!strcmp(name, "aes-256")) return PDF_ENCRYPT_AES_256;
//	return PDF_ENCRYPT_UNKNOWN;
//}
//
//int main(int argc, char **argv)
//{
//	char *infile;
//	char *outfile = "out.pdf";
//	char *password = "";
//	int c;
//	int tighten = 0;
//	pdf_clean_options opts = { 0 };
//	int errors = 0;
//	fz_context *ctx;
//	int structure;
//	const fz_getopt_long_options longopts[] =
//	{
//		{ "color-lossy-image-subsample-method=average|bicubic", &opts.image.color_lossy_image_subsample_method, (void *)1 },
//		{ "color-lossless-image-subsample-method=average|bicubic", &opts.image.color_lossless_image_subsample_method, (void *)2 },
//		{ "color-image-subsample-method=average|bicubic", &opts.image.color_lossy_image_subsample_method, (void *)3 },
//		{ "color-lossy-image-subsample-dpi:", &opts.image.color_lossy_image_subsample_threshold, (void *)4 },
//		{ "color-lossless-image-subsample-dpi:", &opts.image.color_lossless_image_subsample_threshold, (void *)5 },
//		{ "color-image-subsample-dpi:", &opts.image.color_lossless_image_subsample_threshold, (void *)6 },
//		{ "color-lossy-image-recompress-method=never|same|lossless|jpeg:|j2k:|fax|jbig2", &opts.image.color_lossy_image_recompress_method, (void *)7 },
//		{ "color-lossless-image-recompress-method=never|same|lossless|jpeg:|j2k:|fax|jbig2", &opts.image.color_lossless_image_recompress_method, (void *)8 },
//		{ "color-image-recompress-method=never|same|lossless|jpeg:|j2k:|fax|jbig2", &opts.image.color_lossless_image_recompress_method, (void *)9 },
//
//		{ "gray-lossy-image-subsample-method=average|bicubic", &opts.image.gray_lossy_image_subsample_method, (void *)10 },
//		{ "gray-lossless-image-subsample-method=average|bicubic", &opts.image.gray_lossless_image_subsample_method, (void *)11 },
//		{ "gray-image-subsample-method=average|bicubic", &opts.image.gray_lossy_image_subsample_method, (void *)12 },
//		{ "gray-lossy-image-subsample-dpi:", &opts.image.gray_lossy_image_subsample_threshold, (void *)13 },
//		{ "gray-lossless-image-subsample-dpi:", &opts.image.gray_lossless_image_subsample_threshold, (void *)14 },
//		{ "gray-image-subsample-dpi:", &opts.image.gray_lossless_image_subsample_threshold, (void *)15 },
//		{ "gray-lossy-image-recompress-method=never|same|lossless|jpeg:|j2k:|fax|jbig2", &opts.image.gray_lossy_image_recompress_method, (void *)16 },
//		{ "gray-lossless-image-recompress-method=never|same|lossless|jpeg:|j2k:|fax|jbig2", &opts.image.gray_lossless_image_recompress_method, (void *)17 },
//		{ "gray-image-recompress-method=never|same|lossless|jpeg:|j2k:|fax|jbig2", &opts.image.gray_lossless_image_recompress_method, (void *)18 },
//
//		{ "bitonal-image-subsample-method=average|bicubic", &opts.image.bitonal_image_subsample_method, (void *)19 },
//		{ "bitonal-image-subsample-dpi:", &opts.image.bitonal_image_subsample_threshold, (void *)20 },
//		{ "bitonal-image-recompress-method=never|same|lossless|jpeg:|j2k:|fax|jbig2", &opts.image.bitonal_image_recompress_method, (void *)21 },
//
//		{ "structure=drop|keep", &structure, (void *)22 },
//
//		{ NULL, NULL, NULL }
//	};
//
//
//	opts.write = pdf_default_write_options;
//	opts.write.dont_regenerate_id = 1;
//
//	while ((c = fz_getopt_long(argc, argv, "ade:fgilmp:stczDAE:O:U:P:SZ", longopts)) != -1)
//	{
//		switch (c)
//		{
//		case 'p': password = fz_optarg; break;
//
//		case 'd': opts.write.do_decompress += 1; break;
//		case 'z': opts.write.do_compress += 1; break;
//		case 'f': opts.write.do_compress_fonts += 1; break;
//		case 'i': opts.write.do_compress_images += 1; break;
//		case 'a': opts.write.do_ascii += 1; break;
//		case 'e': opts.write.compression_effort = fz_atoi(fz_optarg); break;
//		case 'g': opts.write.do_garbage += 1; break;
//		case 'l': opts.write.do_linear += 1; break;
//		case 'c': opts.write.do_clean += 1; break;
//		case 's': opts.write.do_sanitize += 1; break;
//		case 't': tighten = 1; break;
//		case 'A': opts.write.do_appearance += 1; break;
//
//		case 'D': opts.write.do_encrypt = PDF_ENCRYPT_NONE; break;
//		case 'E': opts.write.do_encrypt = encrypt_method_from_string(fz_optarg); break;
//		case 'P': opts.write.permissions = fz_atoi(fz_optarg); break;
//		case 'O': fz_strlcpy(opts.write.opwd_utf8, fz_optarg, sizeof opts.write.opwd_utf8); break;
//		case 'U': fz_strlcpy(opts.write.upwd_utf8, fz_optarg, sizeof opts.write.upwd_utf8); break;
//		case 'm': opts.write.do_preserve_metadata = 1; break;
//		case 'S': opts.subset_fonts = 1; break;
//		case 'Z': opts.write.do_use_objstms = 1; break;
//		case 0:
//		{
//			switch((int)(intptr_t)fz_optlong->opaque)
//			{
//			default:
//			case 0:
//				assert(!"Never happens");
//				break;
//
//			case 1: /* color-lossy-image-subsample-method */
//			case 2: /* color-lossless-image-subsample-method */
//				break;
//			case 3: /* color-image-subsample-method */
//				opts.image.color_lossless_image_subsample_method = opts.image.color_lossy_image_subsample_method;
//				break;
//			case 4: /* color-lossy-image-subsample-dpi */
//				opts.image.color_lossy_image_subsample_to = (fz_optarg ? fz_atoi(fz_optarg) : opts.image.color_lossy_image_subsample_threshold);
//				break;
//			case 5: /* color-lossless-image-subsample-dpi */
//				opts.image.color_lossless_image_subsample_to = (fz_optarg ? fz_atoi(fz_optarg) : opts.image.color_lossless_image_subsample_threshold);
//				break;
//			case 6: /* color-image-subsample-dpi */
//				opts.image.color_lossless_image_subsample_to = (fz_optarg ? fz_atoi(fz_optarg) : opts.image.color_lossless_image_subsample_threshold);
//				opts.image.color_lossy_image_subsample_threshold = opts.image.color_lossless_image_subsample_threshold;
//				opts.image.color_lossy_image_subsample_to = opts.image.color_lossless_image_subsample_to;
//				break;
//			case 7: /* color-lossy-image-recompress-method */
//				opts.image.color_lossless_image_recompress_quality = fz_optarg;
//				break;
//			case 8: /* color-lossless-image-recompress-method */
//				opts.image.color_lossy_image_recompress_quality = fz_optarg;
//				break;
//			case 9: /* color-image-recompress-method */
//				opts.image.color_lossless_image_recompress_quality = fz_optarg;
//				opts.image.color_lossy_image_recompress_method = opts.image.color_lossless_image_recompress_method;
//				opts.image.color_lossy_image_recompress_quality = opts.image.color_lossless_image_recompress_quality;
//				break;
//
//			case 10: /* gray-lossy-image-subsample-method */
//			case 11: /* gray-lossless-image-subsample-method */
//				break;
//			case 12: /* gray-image-subsample-method */
//				opts.image.gray_lossless_image_subsample_method = opts.image.gray_lossy_image_subsample_method;
//				break;
//			case 13: /* gray-lossy-image-subsample-dpi */
//				opts.image.gray_lossy_image_subsample_to = (fz_optarg ? fz_atoi(fz_optarg) : opts.image.gray_lossless_image_subsample_threshold);
//				break;
//			case 14: /* gray-lossless-image-subsample-dpi */
//				opts.image.gray_lossless_image_subsample_to = (fz_optarg ? fz_atoi(fz_optarg) : opts.image.gray_lossless_image_subsample_threshold);
//				break;
//			case 15: /* gray-image-subsample-dpi */
//				opts.image.gray_lossless_image_subsample_to = (fz_optarg ? fz_atoi(fz_optarg) : opts.image.gray_lossy_image_subsample_threshold);
//				opts.image.gray_lossy_image_subsample_threshold = opts.image.gray_lossless_image_subsample_threshold;
//				opts.image.gray_lossy_image_subsample_to = opts.image.gray_lossless_image_subsample_to;
//				break;
//			case 16: /* gray-lossy-image-recompress-method */
//				opts.image.gray_lossless_image_recompress_quality = fz_optarg;
//				break;
//			case 17: /* gray-lossless-image-recompress-method */
//				opts.image.gray_lossy_image_recompress_quality = fz_optarg;
//				break;
//			case 18: /* gray-image-recompress-method */
//				opts.image.gray_lossless_image_recompress_quality = fz_optarg;
//				opts.image.gray_lossy_image_recompress_method = opts.image.gray_lossless_image_recompress_method;
//				opts.image.gray_lossy_image_recompress_quality = opts.image.gray_lossless_image_recompress_quality;
//				break;
//
//			case 19: /* bitonal-image-subsample-method */
//				break;
//			case 20: /* bitonal-image-subsample-dpi */
//				opts.image.bitonal_image_subsample_to = (fz_optarg ? fz_atoi(fz_optarg) : opts.image.bitonal_image_subsample_threshold);
//				break;
//			case 21: /* bitonal-image-recompress-method */
//				opts.image.bitonal_image_recompress_quality = fz_optarg;
//				if (fz_optarg)
//					return usage();
//				break;
//			case 22: /* structure */
//				opts.structure = structure; /* Allow for int/enum size mismatch. */
//				break;
//			}
//			break;
//		}
//		default: return usage();
//		}
//	}
//
//	if ((opts.write.do_ascii || opts.write.do_decompress) && !opts.write.do_compress)
//		opts.write.do_pretty = !tighten;
//
//	if (argc - fz_optind < 1)
//		return usage();
//
//	infile = argv[fz_optind++];
//
//	if (argc - fz_optind > 0 &&
//		(strstr(argv[fz_optind], ".pdf") || strstr(argv[fz_optind], ".PDF")))
//	{
//		outfile = argv[fz_optind++];
//	}
//
//	ctx = fz_new_context(NULL, NULL, FZ_STORE_UNLIMITED);
//	if (!ctx)
//	{
//		fprintf(stderr, "cannot initialise context\n");
//		exit(1);
//	}
//
//	fz_try(ctx)
//	{
//		pdf_clean_file(ctx, infile, outfile, password, &opts, argc - fz_optind, &argv[fz_optind]);
//	}
//	fz_catch(ctx)
//	{
//		fz_report_error(ctx);
//		errors++;
//	}
//	fz_drop_context(ctx);
//
//	return errors != 0;
//}
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