src/image_load_pdf.c

   1 /*
   2  * Copyright (C) 20018 - The Geeqie Team
   3  *
   4  * Author: Colin Clark
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along
  17  * with this program; if not, write to the Free Software Foundation, Inc.,
  18  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  19  */
  20
  21 #include "main.h"
  22
  23 #include "image-load.h"
  24 #include "image_load_pdf.h"
  25
  26 #ifdef HAVE_PDF
  27 #include <poppler/glib/poppler.h>
  28
  29 typedef struct _ImageLoaderPDF ImageLoaderPDF;
  30 struct _ImageLoaderPDF {
  31         ImageLoaderBackendCbAreaUpdated area_updated_cb;
  32         ImageLoaderBackendCbSize size_cb;
  33         ImageLoaderBackendCbAreaPrepared area_prepared_cb;
  34         gpointer data;
  35         GdkPixbuf *pixbuf;
  36         guint requested_width;
  37         guint requested_height;
  38         gboolean abort;
  39 };
  40
  41 static gboolean image_loader_pdf_load(gpointer loader, const guchar *buf, gsize count, GError **error)
  42 {
  43         ImageLoaderPDF *ld = (ImageLoaderPDF *) loader;
  44         ImageLoader *il = ld->data;
  45         GError *poppler_error;
  46         gchar *uri;
  47         PopplerPage *page;
  48         PopplerDocument *document;
  49         gint page_num;
  50         gdouble width, height;
  51         cairo_surface_t *surface;
  52         cairo_t *cr;
  53         gboolean ret = FALSE;
  54
  55         uri = g_filename_to_uri(il->fd->path, NULL, &poppler_error);
  56         if (uri == NULL)
  57                 {
  58                 log_printf("warning: pdf reader error: %s\n", poppler_error->message);
  59                 }
  60         else
  61                 {
  62                 page_num = 0;
  63                 document = poppler_document_new_from_file(uri, NULL, &poppler_error);
  64                 page = poppler_document_get_page(document, page_num);
  65                 poppler_page_get_size(page, &width, &height);
  66
  67                 surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, width, height);
  68                 cr = cairo_create(surface);
  69                 poppler_page_render(page, cr);
  70
  71                 ld->pixbuf = gdk_pixbuf_get_from_surface(surface, 0, 0, width, height);
  72                 ld->area_updated_cb(loader, 0, 0, width, height, ld->data);
  73
  74                 cairo_destroy (cr);
  75                 cairo_surface_destroy(surface);
  76                 g_free(uri);
  77                 g_object_unref(page);
  78                 g_object_unref(document);
  79                 ret = TRUE;
  80                 }
  81
  82         return ret;
  83 }
  84
  85 static gpointer image_loader_pdf_new(ImageLoaderBackendCbAreaUpdated area_updated_cb, ImageLoaderBackendCbSize size_cb, ImageLoaderBackendCbAreaPrepared area_prepared_cb, gpointer data)
  86 {
  87         ImageLoaderPDF *loader = g_new0(ImageLoaderPDF, 1);
  88         loader->area_updated_cb = area_updated_cb;
  89         loader->size_cb = size_cb;
  90         loader->area_prepared_cb = area_prepared_cb;
  91         loader->data = data;
  92         return (gpointer) loader;
  93 }
  94
  95 static void image_loader_pdf_set_size(gpointer loader, int width, int height)
  96 {
  97         ImageLoaderPDF *ld = (ImageLoaderPDF *) loader;
  98         ld->requested_width = width;
  99         ld->requested_height = height;
 100 }
 101
 102 static GdkPixbuf* image_loader_pdf_get_pixbuf(gpointer loader)
 103 {
 104         ImageLoaderPDF *ld = (ImageLoaderPDF *) loader;
 105         return ld->pixbuf;
 106 }
 107
 108 static gchar* image_loader_pdf_get_format_name(gpointer loader)
 109 {
 110         return g_strdup("pdf");
 111 }
 112
 113 static gchar** image_loader_pdf_get_format_mime_types(gpointer loader)
 114 {
 115         static gchar *mime[] = {"application/pdf", NULL};
 116         return g_strdupv(mime);
 117 }
 118
 119 static gboolean image_loader_pdf_close(gpointer loader, GError **error)
 120 {
 121         return TRUE;
 122 }
 123
 124 static void image_loader_pdf_abort(gpointer loader)
 125 {
 126         ImageLoaderPDF *ld = (ImageLoaderPDF *) loader;
 127         ld->abort = TRUE;
 128 }
 129
 130 static void image_loader_pdf_free(gpointer loader)
 131 {
 132         ImageLoaderPDF *ld = (ImageLoaderPDF *) loader;
 133         if (ld->pixbuf) g_object_unref(ld->pixbuf);
 134         g_free(ld);
 135 }
 136
 137 void image_loader_backend_set_pdf(ImageLoaderBackend *funcs)
 138 {
 139         funcs->loader_new = image_loader_pdf_new;
 140         funcs->set_size = image_loader_pdf_set_size;
 141         funcs->load = image_loader_pdf_load;
 142         funcs->write = NULL;
 143         funcs->get_pixbuf = image_loader_pdf_get_pixbuf;
 144         funcs->close = image_loader_pdf_close;
 145         funcs->abort = image_loader_pdf_abort;
 146         funcs->free = image_loader_pdf_free;
 147         funcs->get_format_name = image_loader_pdf_get_format_name;
 148         funcs->get_format_mime_types = image_loader_pdf_get_format_mime_types;
 149 }
 150
 151 #endif
 152 /* vim: set shiftwidth=8 softtabstop=0 cindent cinoptions={1s: */