Add preliminary support for HN figure placement.
Signed-off-by: yzrh <yzrh@noema.org>
This commit is contained in:
parent
224a09a015
commit
abce2fd2e4
6 changed files with 156 additions and 53 deletions
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@ -39,9 +39,9 @@ Specify output file
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Set buffer size (default 512k)
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-v, --verbose
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Print more information (twice for even more, three times for HN image decoding information as well)
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Print more information (twice for even more, three times for HN image processing information as well)
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Thanks
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======
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This project is inspired by [https://github.com/JeziL/caj2pdf](https://github.com/JeziL/caj2pdf)
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This project is inspired by [https://github.com/caj2pdf/caj2pdf](https://github.com/caj2pdf/caj2pdf)
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@ -138,7 +138,7 @@ cnki_info(cnki_t **param)
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if ((*param)->file_stat->outline > 0) {
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if ((*param)->stat > 1) {
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printf("Loading outline(s)\n");
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printf("\t%16s\t%-24s\t%12s\t%12s\t%5s\n",
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printf("\t%19s\t%-24s\t%12s\t%12s\t%5s\n",
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"title",
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"hierarchy",
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"page",
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@ -58,6 +58,10 @@ typedef struct _hn_image_t {
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int32_t format; /* hn_code */
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int32_t address;
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int32_t size;
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int16_t x;
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int16_t y;
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int16_t w;
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int16_t h;
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char *image;
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} hn_image_t;
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@ -93,6 +93,10 @@ cnki_hn(cnki_t **param)
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fread(&ptr->image_data[i].format, 4, 1, (*param)->fp_i);
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fread(&ptr->image_data[i].address, 4, 1, (*param)->fp_i);
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fread(&ptr->image_data[i].size, 4, 1, (*param)->fp_i);
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ptr->image_data[i].x = 0;
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ptr->image_data[i].y = 0;
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ptr->image_data[i].w = 0;
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ptr->image_data[i].h = 0;
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fseek((*param)->fp_i,
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ptr->image_data[i].address + ptr->image_data[i].size,
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SEEK_SET);
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177
src/cnki_pdf.c
177
src/cnki_pdf.c
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@ -524,7 +524,7 @@ cnki_pdf_hn(cnki_t **param)
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"/Subtype /Image\n");
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if ((*param)->stat > 2)
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printf("\tDecoding data, page %04d item %02d format %d... ",
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printf("\tProcessing image, page %04d item %d format %d... ",
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ptr->page, i, ptr->image_data[i].format);
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switch (ptr->image_data[i].format) {
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@ -700,7 +700,7 @@ cnki_pdf_hn(cnki_t **param)
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snprintf(buf, 64, "/Im%d %d 0 R", i, ids[i]);
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strcat(dictionary, buf);
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if (i + 1 < ptr->image_length)
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if (i < ptr->image_length - 1)
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strcat(dictionary, " ");
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}
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@ -739,43 +739,112 @@ cnki_pdf_hn(cnki_t **param)
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memset(dictionary, 0, dictionary_size);
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strcat(dictionary, "<feff");
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strcat(dictionary, "BT\n");
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for (int i = 0; i < ptr->text_size; i += 6) {
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if (i + 5 >= ptr->text_size)
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for (int i = 0, j = 0; i < ptr->text_size - 1;) {
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switch ((uint16_t) (ptr->text[i + 1] << 8 | ptr->text[i])) {
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case 0x8001:
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if (ptr->address_next <= ptr->address) {
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i += 2;
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break;
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}
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strcat(dictionary, "T*\n");
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case 0x8070:
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if (ptr->address_next > ptr->address) {
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i += 4;
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for (;;) {
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if (i + 3 >= ptr->text_size ||
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(unsigned char) ptr->text[i + 1] == 0x80)
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break;
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conv_src[0] = ptr->text[i + 5];
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conv_src[1] = ptr->text[i + 4];
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if ((conv_src[0] << 8 | conv_src[1]) == 0xa389) {
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strcat(dictionary, "a389");
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continue;
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} else if ((conv_src[0] << 8 | conv_src[1]) == 0xa38a) {
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strcat(dictionary, "a38a");
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continue;
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} else if ((conv_src[0] << 8 | conv_src[1]) == 0xa38d) {
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strcat(dictionary, "a38d");
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continue;
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} else if ((conv_src[0] << 8 | conv_src[1]) == 0xa3a0) {
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strcat(dictionary, "a3a0");
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continue;
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}
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conv_src[0] = ptr->text[i + 3];
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conv_src[1] = ptr->text[i + 2];
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conv_size = 6;
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if (strconv(&conv_dst, "UTF-16BE",
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conv_src, "GB18030", &conv_size) == 0) {
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for (int j = 0; j < conv_size - 2; j++) {
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if (conv_size - 2 > 0) {
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strcat(dictionary, "<feff");
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for (int k = 0; k < conv_size - 2; k++) {
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snprintf(conv_hex, 3,
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"%02x", (unsigned char) conv_dst[j]);
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"%02x", (unsigned char) conv_dst[k]);
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strcat(dictionary, conv_hex);
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}
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strcat(dictionary, "> Tj\n");
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}
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free(conv_dst);
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}
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i += 4;
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}
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strcat(dictionary, ">");
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break;
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}
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if (i + 7 >= ptr->text_size) {
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i += 2;
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break;
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}
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conv_src[0] = ptr->text[i + 7];
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conv_src[1] = ptr->text[i + 6];
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conv_size = 6;
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if (strconv(&conv_dst, "UTF-16BE",
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conv_src, "GB18030", &conv_size) == 0) {
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if (conv_size - 2 > 0) {
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strcat(dictionary, "<feff");
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for (int k = 0; k < conv_size - 2; k++) {
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snprintf(conv_hex, 3,
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"%02x", (unsigned char) conv_dst[k]);
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strcat(dictionary, conv_hex);
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}
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strcat(dictionary, "> Tj\n");
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}
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free(conv_dst);
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}
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i += 8;
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break;
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case 0x800a:
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if (i + 27 >= ptr->text_size || j >= ptr->image_length) {
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i += 2;
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break;
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}
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if (ptr->image_length > 0) {
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ptr->image_data[j].x =
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ptr->text[i + 5] << 8 | ptr->text[i + 4];
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ptr->image_data[j].y =
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ptr->text[i + 7] << 8 | ptr->text[i + 6];
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ptr->image_data[j].w =
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ptr->text[i + 9] << 8 | ptr->text[i + 8];
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ptr->image_data[j].h =
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ptr->text[i + 11] << 8 | ptr->text[i + 10];
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if ((*param)->stat > 2)
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printf("\tItem %d: origin (%4d, %4d), width %4d, height %4d\n",
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j,
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ptr->image_data[j].x,
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ptr->image_data[j].y,
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ptr->image_data[j].w,
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ptr->image_data[j].h);
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}
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i += 28;
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j++;
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break;
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default:
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i += 4;
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break;
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}
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}
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strcat(dictionary, "ET");
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/* FIXME: Use the text somehow? */
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free(dictionary);
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@ -794,20 +863,14 @@ cnki_pdf_hn(cnki_t **param)
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if (ptr->image_length > 0) {
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memset(dictionary, 0, dictionary_size);
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strcat(dictionary, "q\n");
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strcat(dictionary, "0.25 0 0 0.25 0 0 cm\n");
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double resize_x;
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double resize_y;
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for (int i = 0; i < ptr->image_length; i++) {
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if (dim[i * 2] <= 0 || dim[i * 2 + 1] <= 0)
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continue;
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char resize_str[64] = "0.25 0 0 0.25 0 0 cm\n";
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double resize_x = 1;
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double resize_y = 1;
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if (dim[0] > 0 && dim[1] > 0) {
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/* Scale within bound of A4 paper */
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resize_x = 595.276 * 4 / dim[i * 2];
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resize_y = 841.89 * 4 / dim[i * 2 + 1];
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resize_x = 4 * 595.2756 / dim[0];
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resize_y = 4 * 841.8898 / dim[1];
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if (resize_y < resize_x)
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snprintf(buf, 64, "%f 0 0 %f 0 0 cm\n",
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@ -815,9 +878,18 @@ cnki_pdf_hn(cnki_t **param)
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else
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snprintf(buf, 64, "%f 0 0 %f 0 0 cm\n",
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resize_x, resize_x);
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strcat(dictionary, buf);
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strcat(resize_str, buf);
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}
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/* Apply transformation matrix */
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for (int i = 0; i < ptr->image_length; i++) {
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if (dim[i * 2] <= 0 || dim[i * 2 + 1] <= 0)
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continue;
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strcat(dictionary, "q\n");
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strcat(dictionary, resize_str);
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/* Rotate image */
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if (ptr->image_data[i].format == JBIG || ptr->image_data[i].format == DCT_1) {
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snprintf(buf, 64, "1 0 0 1 0 %d cm\n",
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dim[i * 2 + 1]);
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@ -826,16 +898,39 @@ cnki_pdf_hn(cnki_t **param)
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strcat(dictionary, "1 0 0 -1 0 0 cm\n");
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}
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/* Translate figure */
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if (i > 0) {
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double origin_x = 0.4043745 * ptr->image_data[i].x;
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double origin_y = 0.4043561 * ptr->image_data[i].y;
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if (origin_x < 0)
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origin_x += (2381.102 - dim[i * 2]) / 2;
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if (origin_y < 0)
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origin_y += (3367.559 + dim[i * 2 + 1]) / 2;
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if (ptr->image_data[i].format == JBIG || ptr->image_data[i].format == DCT_1)
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origin_y = -3367.559 + origin_y + dim[i * 2 + 1];
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else
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origin_y = 3367.559 - origin_y - dim[i * 2 + 1];
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snprintf(buf, 64, "1 0 0 1 %f %f cm\n", origin_x, origin_y);
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strcat(dictionary, buf);
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}
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snprintf(buf, 64, "%d 0 0 %d 0 0 cm\n",
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dim[i * 2], dim[i * 2 + 1]);
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strcat(dictionary, buf);
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snprintf(buf, 64, "/Im%d Do\n", i);
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strcat(dictionary, buf);
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}
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strcat(dictionary, "Q");
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if (i < ptr->image_length - 1)
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strcat(dictionary, "\n");
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}
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if (strdeflate(&stream, &stream_size, dictionary, strlen(dictionary)) != 0) {
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free(root_kid);
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free(ids);
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@ -866,7 +961,7 @@ cnki_pdf_hn(cnki_t **param)
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strcat(dictionary, "<<\n/Type /Page\n");
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/* A4 paper */
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strcat(dictionary, "/MediaBox [0 0 595.276 841.89]\n");
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strcat(dictionary, "/MediaBox [0 0 595.2756 841.8898]\n");
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if (ptr->image_length > 0) {
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free(dim);
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@ -946,7 +1041,7 @@ cnki_pdf_hn(cnki_t **param)
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for (int i = 0; i < (*param)->file_stat->page; i++) {
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snprintf(buf, 64, "%d 0 R", root_kid[i]);
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strcat(dictionary, buf);
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if (i + 1 < (*param)->file_stat->page)
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if (i < (*param)->file_stat->page - 1)
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strcat(dictionary, " ");
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}
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@ -6,5 +6,5 @@
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#define VERSION "0"
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#define RELEASE "2"
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#define PATCH "1"
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#define PATCH "2"
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#define EXTRA ""
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