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-rw-r--r--djvu/djvu-document.c320
1 files changed, 320 insertions, 0 deletions
diff --git a/djvu/djvu-document.c b/djvu/djvu-document.c
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+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8; c-indent-level: 8 -*- */
+/*
+ * Copyright (C) 2005, Nickolay V. Shmyrev <nshmyrev@yandex.ru>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#include "djvu-document.h"
+#include "ev-document-thumbnails.h"
+#include "ev-document-misc.h"
+
+#include <libdjvu/ddjvuapi.h>
+#include <gtk/gtk.h>
+#include <gdk-pixbuf/gdk-pixbuf-core.h>
+
+#define SCALE_FACTOR 0.2
+
+enum {
+ PROP_0,
+ PROP_TITLE
+};
+
+struct _DjvuDocumentClass
+{
+ GObjectClass parent_class;
+};
+
+struct _DjvuDocument
+{
+ GObject parent_instance;
+
+ ddjvu_context_t *d_context;
+ ddjvu_document_t *d_document;
+ ddjvu_format_t *d_format;
+};
+
+typedef struct _DjvuDocumentClass DjvuDocumentClass;
+
+static void djvu_document_document_iface_init (EvDocumentIface *iface);
+static void djvu_document_document_thumbnails_iface_init (EvDocumentThumbnailsIface *iface);
+
+G_DEFINE_TYPE_WITH_CODE
+ (DjvuDocument, djvu_document, G_TYPE_OBJECT,
+ {
+ G_IMPLEMENT_INTERFACE (EV_TYPE_DOCUMENT, djvu_document_document_iface_init);
+ G_IMPLEMENT_INTERFACE (EV_TYPE_DOCUMENT_THUMBNAILS, djvu_document_document_thumbnails_iface_init)
+ });
+
+static gboolean
+djvu_document_load (EvDocument *document,
+ const char *uri,
+ GError **error)
+{
+ DjvuDocument *djvu_document = DJVU_DOCUMENT (document);
+ ddjvu_document_t *doc;
+ gchar *filename;
+
+ /* FIXME: We could actually load uris */
+ filename = g_filename_from_uri (uri, NULL, error);
+ if (!filename)
+ return FALSE;
+
+ doc = ddjvu_document_create_by_filename (djvu_document->d_context, filename, TRUE);
+
+ if (!doc) return FALSE;
+
+ if (djvu_document->d_document)
+ ddjvu_document_release (djvu_document->d_document);
+
+ djvu_document->d_document = doc;
+
+ while (!ddjvu_document_decoding_done (djvu_document->d_document))
+ ddjvu_message_wait (djvu_document->d_context);
+
+ return TRUE;
+}
+
+
+static gboolean
+djvu_document_save (EvDocument *document,
+ const char *uri,
+ GError **error)
+{
+ g_warning ("djvu_document_save not implemented"); /* FIXME */
+ return TRUE;
+}
+
+static int
+djvu_document_get_n_pages (EvDocument *document)
+{
+ DjvuDocument *djvu_document = DJVU_DOCUMENT (document);
+
+ g_return_val_if_fail (djvu_document->d_document, 0);
+
+ return ddjvu_document_get_pagenum (djvu_document->d_document);
+}
+
+static void
+djvu_document_get_page_size (EvDocument *document,
+ int page,
+ double *width,
+ double *height)
+{
+ DjvuDocument *djvu_document = DJVU_DOCUMENT (document);
+
+ ddjvu_page_t *d_page;
+
+ g_return_if_fail (djvu_document->d_document);
+
+ d_page = ddjvu_page_create_by_pageno (djvu_document->d_document, page);
+
+ while (!ddjvu_page_decoding_done (d_page))
+ ddjvu_message_wait (djvu_document->d_context);
+
+ if (width)
+ *width = ddjvu_page_get_width (d_page) * SCALE_FACTOR;
+ if (height)
+ *height = ddjvu_page_get_height (d_page) * SCALE_FACTOR;
+
+ ddjvu_page_release (d_page);
+}
+
+static GdkPixbuf *
+djvu_document_render_pixbuf (EvDocument *document,
+ int page, gdouble scale)
+{
+ DjvuDocument *djvu_document = DJVU_DOCUMENT (document);
+ GdkPixbuf *pixbuf;
+
+ ddjvu_rect_t rrect;
+ ddjvu_rect_t prect;
+ ddjvu_page_t *d_page;
+
+ double page_width, page_height;
+
+ d_page = ddjvu_page_create_by_pageno (djvu_document->d_document, page);
+
+ while (!ddjvu_page_decoding_done (d_page))
+ ddjvu_message_wait (djvu_document->d_context);
+
+ page_width = ddjvu_page_get_width (d_page) * scale * SCALE_FACTOR;
+ page_height = ddjvu_page_get_height (d_page) * scale * SCALE_FACTOR;
+
+ pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, FALSE, 8, page_width, page_height);
+
+ prect.x = 0; prect.y = 0;
+ prect.w = page_width; prect.h = page_height;
+ rrect = prect;
+
+ ddjvu_page_render(d_page, DDJVU_RENDER_COLOR,
+ &prect,
+ &rrect,
+ djvu_document->d_format,
+ gdk_pixbuf_get_rowstride (pixbuf),
+ gdk_pixbuf_get_pixels (pixbuf));
+
+
+ return pixbuf;
+}
+
+static void
+djvu_document_finalize (GObject *object)
+{
+ DjvuDocument *djvu_document = DJVU_DOCUMENT (object);
+
+ if (djvu_document->d_document)
+ ddjvu_document_release (djvu_document->d_document);
+
+ ddjvu_context_release (djvu_document->d_context);
+ ddjvu_format_release (djvu_document->d_format);
+
+ G_OBJECT_CLASS (djvu_document_parent_class)->finalize (object);
+}
+
+static void
+djvu_document_set_property (GObject *object,
+ guint prop_id,
+ const GValue *value,
+ GParamSpec *pspec)
+{
+ switch (prop_id)
+ {
+ case PROP_TITLE:
+ /* read only */
+ break;
+ }
+}
+
+static void
+djvu_document_get_property (GObject *object,
+ guint prop_id,
+ GValue *value,
+ GParamSpec *pspec)
+{
+ switch (prop_id)
+ {
+ case PROP_TITLE:
+ g_value_set_string (value, NULL);
+ break;
+ }
+}
+
+static void
+djvu_document_class_init (DjvuDocumentClass *klass)
+{
+ GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
+
+ gobject_class->finalize = djvu_document_finalize;
+ gobject_class->get_property = djvu_document_get_property;
+ gobject_class->set_property = djvu_document_set_property;
+
+ g_object_class_override_property (gobject_class, PROP_TITLE, "title");
+}
+
+static char *
+djvu_document_get_text (EvDocument *document, gint page, EvRectangle *rect)
+{
+ /* FIXME this method should not be in EvDocument */
+ g_warning ("djvu_document_get_text not implemented");
+ return NULL;
+}
+
+static void
+djvu_document_document_iface_init (EvDocumentIface *iface)
+{
+ iface->load = djvu_document_load;
+ iface->save = djvu_document_save;
+ iface->get_text = djvu_document_get_text;
+ iface->get_n_pages = djvu_document_get_n_pages;
+ iface->get_page_size = djvu_document_get_page_size;
+ iface->render_pixbuf = djvu_document_render_pixbuf;
+}
+
+static void
+djvu_document_thumbnails_get_dimensions (EvDocumentThumbnails *document,
+ gint page,
+ gint suggested_width,
+ gint *width,
+ gint *height)
+{
+ DjvuDocument *djvu_document = DJVU_DOCUMENT (document);
+ gdouble p_width, p_height;
+ gdouble page_ratio;
+
+ djvu_document_get_page_size (EV_DOCUMENT(djvu_document), page, &p_width, &p_height);
+
+ page_ratio = p_height / p_width;
+ *width = suggested_width;
+ *height = (gint) (suggested_width * page_ratio);
+
+ return;
+}
+
+static GdkPixbuf *
+djvu_document_thumbnails_get_thumbnail (EvDocumentThumbnails *document,
+ gint page,
+ gint width,
+ gboolean border)
+{
+ DjvuDocument *djvu_document = DJVU_DOCUMENT (document);
+ GdkPixbuf *pixbuf;
+ gint thumb_width, thumb_height;
+
+ gchar *pixels;
+
+ g_return_val_if_fail (djvu_document->d_document, NULL);
+
+ djvu_document_thumbnails_get_dimensions (document, page, width, &thumb_width, &thumb_height);
+
+ if (border) {
+ pixbuf = ev_document_misc_get_thumbnail_frame (thumb_width, thumb_height, NULL);
+ pixels = gdk_pixbuf_get_pixels (pixbuf) + gdk_pixbuf_get_rowstride (pixbuf) + 4;
+ } else {
+ pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, 8,
+ thumb_width, thumb_height);
+ gdk_pixbuf_fill (pixbuf, 0xffffffff);
+ pixels = gdk_pixbuf_get_pixels (pixbuf);
+ }
+
+ while (ddjvu_thumbnail_status (djvu_document->d_document, page, 1) < DDJVU_JOB_OK)
+ ddjvu_message_wait (djvu_document->d_context);
+
+ ddjvu_thumbnail_render (djvu_document->d_document, page,
+ &thumb_width, &thumb_height,
+ djvu_document->d_format,
+ gdk_pixbuf_get_rowstride (pixbuf),
+ pixels);
+
+ return pixbuf;
+}
+
+static void
+djvu_document_document_thumbnails_iface_init (EvDocumentThumbnailsIface *iface)
+{
+ iface->get_thumbnail = djvu_document_thumbnails_get_thumbnail;
+ iface->get_dimensions = djvu_document_thumbnails_get_dimensions;
+}
+
+static void
+djvu_document_init (DjvuDocument *djvu_document)
+{
+ djvu_document->d_context = ddjvu_context_create ("Evince");
+ djvu_document->d_format = ddjvu_format_create (DDJVU_FORMAT_RGB24, 0, 0);
+ ddjvu_format_set_row_order (djvu_document->d_format,1);
+
+ djvu_document->d_document = NULL;
+}
+
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