zathura/ft/djvu/djvu.c

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C
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/* See LICENSE file for license and copyright information */
#include <stdlib.h>
#include "djvu.h"
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#include "../../zathura.h"
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void
plugin_register(zathura_document_plugin_t* plugin)
{
plugin->file_extension = "djvu";
plugin->open_function = djvu_document_open;
}
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bool
djvu_document_open(zathura_document_t* document)
{
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if (!document) {
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goto error_out;
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}
document->functions.document_free = djvu_document_free;
document->functions.document_index_generate = djvu_document_index_generate;;
document->functions.document_save_as = djvu_document_save_as;
document->functions.document_attachments_get = djvu_document_attachments_get;
document->functions.page_get = djvu_page_get;
document->functions.page_search_text = djvu_page_search_text;
document->functions.page_links_get = djvu_page_links_get;
document->functions.page_form_fields_get = djvu_page_form_fields_get;
document->functions.page_render = djvu_page_render;
document->functions.page_free = djvu_page_free;
document->data = malloc(sizeof(djvu_document_t));
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if (!document->data) {
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goto error_out;
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}
djvu_document_t* djvu_document = (djvu_document_t*) document->data;
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djvu_document->context = NULL;
djvu_document->document = NULL;
djvu_document->format = NULL;
/* setup format */
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djvu_document->format = ddjvu_format_create(DDJVU_FORMAT_RGB24, 0, NULL);
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if (!djvu_document->format) {
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goto error_free;
}
ddjvu_format_set_row_order(djvu_document->format, TRUE);
/* setup context */
djvu_document->context = ddjvu_context_create("zathura");
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if (!djvu_document->context) {
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goto error_free;
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}
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/* setup document */
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djvu_document->document = ddjvu_document_create_by_filename(djvu_document->context, document->file_path, FALSE);
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if (!djvu_document->document) {
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goto error_free;
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}
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/* load document info */
ddjvu_message_t* msg;
ddjvu_message_wait(djvu_document->context);
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while ((msg = ddjvu_message_peek(djvu_document->context)) && (msg->m_any.tag != DDJVU_DOCINFO)) {
if (msg->m_any.tag == DDJVU_ERROR) {
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goto error_free;
}
ddjvu_message_pop(djvu_document->context);
}
/* decoding error */
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if (ddjvu_document_decoding_error(djvu_document->document)) {
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goto error_free;
}
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document->number_of_pages = ddjvu_document_get_pagenum(djvu_document->document);
return true;
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error_free:
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if (djvu_document->format) {
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ddjvu_format_release(djvu_document->format);
}
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if (djvu_document->context) {
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ddjvu_context_release(djvu_document->context);
}
free(document->data);
document->data = NULL;
error_out:
return false;
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}
bool
djvu_document_free(zathura_document_t* document)
{
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if (!document) {
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return false;
}
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if (document->data) {
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djvu_document_t* djvu_document = (djvu_document_t*) document->data;
ddjvu_context_release(djvu_document->context);
ddjvu_document_release(djvu_document->document);
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ddjvu_format_release(djvu_document->format);
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free(document->data);
}
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return true;
}
girara_tree_node_t*
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djvu_document_index_generate(zathura_document_t* document)
{
return NULL;
}
bool
djvu_document_save_as(zathura_document_t* document, const char* path)
{
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if (!document || !document->data || !path) {
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return false;
}
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djvu_document_t* djvu_document = (djvu_document_t*) document->data;
FILE* fp = fopen(path, "w");
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if (!fp) {
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return false;
}
ddjvu_document_save(djvu_document->document, fp, 0, NULL);
fclose(fp);
return true;
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}
zathura_list_t*
djvu_document_attachments_get(zathura_document_t* document)
{
return NULL;
}
zathura_page_t*
djvu_page_get(zathura_document_t* document, unsigned int page)
{
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if (!document || !document->data) {
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return NULL;
}
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djvu_document_t* djvu_document = (djvu_document_t*) document->data;
zathura_page_t* document_page = malloc(sizeof(zathura_page_t));
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if (!document_page) {
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return NULL;
}
document_page->document = document;
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document_page->data = NULL;
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ddjvu_status_t status;
ddjvu_pageinfo_t page_info;
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while ((status = ddjvu_document_get_pageinfo(djvu_document->document, page, &page_info)) < DDJVU_JOB_OK);
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if (status >= DDJVU_JOB_FAILED) {
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free(document_page);
return NULL;
}
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document_page->width = 0.2 * page_info.width;
document_page->height = 0.2 * page_info.height;
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return document_page;
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}
bool
djvu_page_free(zathura_page_t* page)
{
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if (!page) {
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return false;
}
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free(page);
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return true;
}
zathura_list_t*
djvu_page_search_text(zathura_page_t* page, const char* text)
{
return NULL;
}
zathura_list_t*
djvu_page_links_get(zathura_page_t* page)
{
return NULL;
}
zathura_list_t*
djvu_page_form_fields_get(zathura_page_t* page)
{
return NULL;
}
zathura_image_buffer_t*
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djvu_page_render(zathura_page_t* page)
{
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if (!page || !page->document) {
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return NULL;
}
/* calculate sizes */
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unsigned int page_width = page->document->scale * page->width;
unsigned int page_height = page->document->scale * page->height;
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if (!page_width || !page_height) {
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goto error_out;
}
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/* init ddjvu render data */
djvu_document_t* djvu_document = (djvu_document_t*) page->document->data;
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ddjvu_page_t* djvu_page = ddjvu_page_create_by_pageno(djvu_document->document, page->number);
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if (!djvu_page) {
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goto error_out;
}
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while (!ddjvu_page_decoding_done(djvu_page));
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ddjvu_rect_t rrect = { 0, 0, page_width, page_height };
ddjvu_rect_t prect = { 0, 0, page_width, page_height };
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zathura_image_buffer_t* image_buffer = zathura_image_buffer_create(page_width, page_height);
if (image_buffer == NULL) {
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goto error_free;
}
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/* set rotation */
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ddjvu_page_set_rotation(djvu_page, DDJVU_ROTATE_0);
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/* render page */
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ddjvu_page_render(djvu_page, DDJVU_RENDER_COLOR, &prect, &rrect, djvu_document->format,
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3 * page_width, (char*) image_buffer);
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return image_buffer;
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error_free:
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ddjvu_page_release(djvu_page);
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zathura_image_buffer_free(image_buffer);
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error_out:
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return NULL;
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}