1 files changed, 473 insertions, 0 deletions
diff --git a/backend/ps/ev-spectre.c b/backend/ps/ev-spectre.c
new file mode 100644
index 00000000..e1877a7b
--- /dev/null
+++ b/backend/ps/ev-spectre.c
@@ -0,0 +1,473 @@
+/* this file is part of evince, a mate document viewer
+ *
+ * Copyright (C) 2007 Carlos Garcia Campos <[email protected]>
+ *
+ * Evince 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 of the License, or
+ * (at your option) any later version.
+ *
+ * Evince 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+#include <config.h>
+
+#include <config.h>
+#include <glib/gi18n-lib.h>
+#include <stdlib.h>
+#include <libspectre/spectre.h>
+
+#include "ev-spectre.h"
+
+#include "ev-file-exporter.h"
+#include "ev-document-thumbnails.h"
+#include "ev-document-misc.h"
+
+struct _PSDocument {
+ EvDocument object;
+
+ SpectreDocument *doc;
+ SpectreExporter *exporter;
+};
+
+struct _PSDocumentClass {
+ EvDocumentClass parent_class;
+};
+
+static void ps_document_file_exporter_iface_init (EvFileExporterInterface *iface);
+static void ps_document_document_thumbnails_iface_init (EvDocumentThumbnailsInterface *iface);
+
+EV_BACKEND_REGISTER_WITH_CODE (PSDocument, ps_document,
+ {
+ EV_BACKEND_IMPLEMENT_INTERFACE (EV_TYPE_DOCUMENT_THUMBNAILS,
+ ps_document_document_thumbnails_iface_init);
+ EV_BACKEND_IMPLEMENT_INTERFACE (EV_TYPE_FILE_EXPORTER,
+ ps_document_file_exporter_iface_init);
+ });
+
+/* PSDocument */
+static void
+ps_document_init (PSDocument *ps_document)
+{
+}
+
+static void
+ps_document_dispose (GObject *object)
+{
+ PSDocument *ps = PS_DOCUMENT (object);
+
+ if (ps->doc) {
+ spectre_document_free (ps->doc);
+ ps->doc = NULL;
+ }
+
+ if (ps->exporter) {
+ spectre_exporter_free (ps->exporter);
+ ps->exporter = NULL;
+ }
+
+ G_OBJECT_CLASS (ps_document_parent_class)->dispose (object);
+}
+
+/* EvDocumentIface */
+static gboolean
+ps_document_load (EvDocument *document,
+ const char *uri,
+ GError **error)
+{
+ PSDocument *ps = PS_DOCUMENT (document);
+ gchar *filename;
+
+ filename = g_filename_from_uri (uri, NULL, error);
+ if (!filename)
+ return FALSE;
+ 
+ ps->doc = spectre_document_new ();
+
+ spectre_document_load (ps->doc, filename);
+ if (spectre_document_status (ps->doc)) {
+ gchar *filename_dsp;
+ 
+ filename_dsp = g_filename_display_name (filename);
+ g_set_error (error,
+ G_FILE_ERROR,
+ G_FILE_ERROR_FAILED,
+ _("Failed to load document “%s”"),
+ filename_dsp);
+ g_free (filename_dsp);
+ g_free (filename);
+
+ return FALSE;
+ }
+
+ g_free (filename);
+
+ return TRUE;
+}
+
+static gboolean
+ps_document_save (EvDocument *document,
+ const char *uri,
+ GError **error)
+{
+ PSDocument *ps = PS_DOCUMENT (document);
+ gchar *filename;
+
+ filename = g_filename_from_uri (uri, NULL, error);
+ if (!filename)
+ return FALSE;
+
+ spectre_document_save (ps->doc, filename);
+ if (spectre_document_status (ps->doc)) {
+ gchar *filename_dsp;
+
+ filename_dsp = g_filename_display_name (filename);
+ g_set_error (error,
+ G_FILE_ERROR,
+ G_FILE_ERROR_FAILED,
+ _("Failed to save document “%s”"),
+ filename_dsp);
+ g_free (filename_dsp);
+ g_free (filename);
+
+ return FALSE;
+ }
+
+ g_free (filename);
+
+ return TRUE;
+}
+
+static int
+ps_document_get_n_pages (EvDocument *document)
+{
+ PSDocument *ps = PS_DOCUMENT (document);
+
+ return spectre_document_get_n_pages (ps->doc);
+}
+
+static EvPage *
+ps_document_get_page (EvDocument *document,
+ gint index)
+{
+ PSDocument *ps = PS_DOCUMENT (document);
+ SpectrePage *ps_page;
+ EvPage *page;
+
+ ps_page = spectre_document_get_page (ps->doc, index);
+ page = ev_page_new (index);
+ page->backend_page = (EvBackendPage)ps_page;
+ page->backend_destroy_func = (EvBackendPageDestroyFunc)spectre_page_free;
+
+ return page;
+}
+
+static gint
+get_page_rotation (SpectrePage *page)
+{
+ switch (spectre_page_get_orientation (page)) {
+ default:
+ case SPECTRE_ORIENTATION_PORTRAIT:
+ return 0;
+ case SPECTRE_ORIENTATION_LANDSCAPE:
+ return 90;
+ case SPECTRE_ORIENTATION_REVERSE_PORTRAIT:
+ return 180;
+ case SPECTRE_ORIENTATION_REVERSE_LANDSCAPE:
+ return 270;
+ }
+
+ return 0;
+}
+
+static void
+ps_document_get_page_size (EvDocument *document,
+ EvPage *page,
+ double *width,
+ double *height)
+{
+ SpectrePage *ps_page;
+ gdouble page_width, page_height;
+ gint pwidth, pheight;
+ gint rotate;
+
+ ps_page = (SpectrePage *)page->backend_page;
+
+ spectre_page_get_size (ps_page, &pwidth, &pheight);
+
+ rotate = get_page_rotation (ps_page);
+ if (rotate == 90 || rotate == 270) {
+ page_height = pwidth;
+ page_width = pheight;
+ } else {
+ page_width = pwidth;
+ page_height = pheight;
+ }
+
+ if (width) {
+ *width = page_width;
+ }
+
+ if (height) {
+ *height = page_height;
+ }
+}
+
+static char *
+ps_document_get_page_label (EvDocument *document,
+ EvPage *page)
+{
+ return g_strdup (spectre_page_get_label ((SpectrePage *)page->backend_page));
+}
+
+static EvDocumentInfo *
+ps_document_get_info (EvDocument *document)
+{
+ PSDocument *ps = PS_DOCUMENT (document);
+ EvDocumentInfo *info;
+ const gchar *creator;
+ SpectrePage *ps_page;
+ gint width, height;
+
+ info = g_new0 (EvDocumentInfo, 1);
+ info->fields_mask = EV_DOCUMENT_INFO_TITLE |
+ EV_DOCUMENT_INFO_FORMAT |
+ EV_DOCUMENT_INFO_CREATOR |
+ EV_DOCUMENT_INFO_N_PAGES |
+ EV_DOCUMENT_INFO_PAPER_SIZE;
+
+ creator = spectre_document_get_creator (ps->doc);
+
+ ps_page = spectre_document_get_page (ps->doc, 0);
+ spectre_page_get_size (ps_page, &width, &height);
+ spectre_page_free (ps_page);
+ 
+ info->title = g_strdup (spectre_document_get_title (ps->doc));
+ info->format = g_strdup (spectre_document_get_format (ps->doc));
+ info->creator = g_strdup (creator ? creator : spectre_document_get_for (ps->doc));
+ info->n_pages = spectre_document_get_n_pages (ps->doc);
+ info->paper_width = width / 72.0f * 25.4f;
+ info->paper_height = height / 72.0f * 25.4f;
+
+ return info;
+}
+
+static gboolean
+ps_document_get_backend_info (EvDocument *document,
+ EvDocumentBackendInfo *info)
+{
+ info->name = "libspectre";
+ info->version = SPECTRE_VERSION_STRING;
+
+ return TRUE;
+}
+
+static cairo_surface_t *
+ps_document_render (EvDocument *document,
+ EvRenderContext *rc)
+{
+ SpectrePage *ps_page;
+ SpectreRenderContext *src;
+ gint width_points;
+ gint height_points;
+ gint width, height;
+ gint swidth, sheight;
+ guchar *data = NULL;
+ gint stride;
+ gint rotation;
+ cairo_surface_t *surface;
+ static const cairo_user_data_key_t key;
+
+ ps_page = (SpectrePage *)rc->page->backend_page;
+ 
+ spectre_page_get_size (ps_page, &width_points, &height_points);
+
+ width = (gint) ((width_points * rc->scale) + 0.5);
+ height = (gint) ((height_points * rc->scale) + 0.5);
+ rotation = (rc->rotation + get_page_rotation (ps_page)) % 360;
+
+ src = spectre_render_context_new ();
+ spectre_render_context_set_scale (src,
+ (gdouble)width / width_points,
+ (gdouble)height / height_points);
+ spectre_render_context_set_rotation (src, rotation);
+ spectre_page_render (ps_page, src, &data, &stride);
+ spectre_render_context_free (src);
+
+ if (!data) {
+ return NULL;
+ }
+
+ if (spectre_page_status (ps_page)) {
+ g_warning ("%s", spectre_status_to_string (spectre_page_status (ps_page)));
+ g_free (data);
+ 
+ return NULL;
+ }
+
+ if (rotation == 90 || rotation == 270) {
+ swidth = height;
+ sheight = width;
+ } else {
+ swidth = width;
+ sheight = height;
+ }
+ 
+ surface = cairo_image_surface_create_for_data (data,
+ CAIRO_FORMAT_RGB24,
+ swidth, sheight,
+ stride);
+ cairo_surface_set_user_data (surface, &key,
+ data, (cairo_destroy_func_t)g_free);
+ return surface;
+}
+
+static void
+ps_document_class_init (PSDocumentClass *klass)
+{
+ GObjectClass *object_class = G_OBJECT_CLASS (klass);
+ EvDocumentClass *ev_document_class = EV_DOCUMENT_CLASS (klass);
+
+ object_class->dispose = ps_document_dispose;
+
+ ev_document_class->load = ps_document_load;
+ ev_document_class->save = ps_document_save;
+ ev_document_class->get_n_pages = ps_document_get_n_pages;
+ ev_document_class->get_page = ps_document_get_page;
+ ev_document_class->get_page_size = ps_document_get_page_size;
+ ev_document_class->get_page_label = ps_document_get_page_label;
+ ev_document_class->get_info = ps_document_get_info;
+ ev_document_class->get_backend_info = ps_document_get_backend_info;
+ ev_document_class->render = ps_document_render;
+}
+
+/* EvDocumentThumbnailsIface */
+static GdkPixbuf *
+ps_document_thumbnails_get_thumbnail (EvDocumentThumbnails *document_thumbnails,
+ EvRenderContext *rc, 
+ gboolean border)
+{
+ PSDocument *ps = PS_DOCUMENT (document_thumbnails);
+ cairo_surface_t *surface;
+ GdkPixbuf *pixbuf = NULL;
+
+ surface = ps_document_render (EV_DOCUMENT (ps), rc);
+ if (!surface) {
+ g_warning ("Error rendering thumbnail");
+ return NULL;
+ }
+ 
+ pixbuf = ev_document_misc_pixbuf_from_surface (surface);
+ cairo_surface_destroy (surface);
+
+ if (border) {
+ GdkPixbuf *border_pixbuf;
+ 
+ border_pixbuf = ev_document_misc_get_thumbnail_frame (-1, -1, pixbuf);
+ g_object_unref (pixbuf);
+ pixbuf = border_pixbuf;
+ }
+
+ return pixbuf;
+}
+
+static void
+ps_document_thumbnails_get_dimensions (EvDocumentThumbnails *document_thumbnails,
+ EvRenderContext *rc, 
+ gint *width,
+ gint *height)
+{
+ PSDocument *ps = PS_DOCUMENT (document_thumbnails);
+ gdouble page_width, page_height;
+
+ ps_document_get_page_size (EV_DOCUMENT (ps),
+ rc->page,
+ &page_width, &page_height);
+
+ if (rc->rotation == 90 || rc->rotation == 270) {
+ *width = (gint) (page_height * rc->scale);
+ *height = (gint) (page_width * rc->scale);
+ } else {
+ *width = (gint) (page_width * rc->scale);
+ *height = (gint) (page_height * rc->scale);
+ }
+}
+
+static void
+ps_document_document_thumbnails_iface_init (EvDocumentThumbnailsInterface *iface)
+{
+ iface->get_thumbnail = ps_document_thumbnails_get_thumbnail;
+ iface->get_dimensions = ps_document_thumbnails_get_dimensions;
+}
+ 
+/* EvFileExporterIface */
+static void
+ps_document_file_exporter_begin (EvFileExporter *exporter,
+ EvFileExporterContext *fc)
+{
+ PSDocument *ps = PS_DOCUMENT (exporter);
+
+ if (ps->exporter)
+ spectre_exporter_free (ps->exporter);
+
+ switch (fc->format) {
+ case EV_FILE_FORMAT_PS:
+ ps->exporter =
+ spectre_exporter_new (ps->doc,
+ SPECTRE_EXPORTER_FORMAT_PS);
+ break;
+ case EV_FILE_FORMAT_PDF:
+ ps->exporter =
+ spectre_exporter_new (ps->doc,
+ SPECTRE_EXPORTER_FORMAT_PDF);
+ break;
+ default:
+ g_assert_not_reached ();
+ }
+
+ spectre_exporter_begin (ps->exporter, fc->filename);
+}
+
+static void
+ps_document_file_exporter_do_page (EvFileExporter *exporter,
+ EvRenderContext *rc)
+{
+ PSDocument *ps = PS_DOCUMENT (exporter);
+
+ spectre_exporter_do_page (ps->exporter, rc->page->index);
+}
+
+static void
+ps_document_file_exporter_end (EvFileExporter *exporter)
+{
+ PSDocument *ps = PS_DOCUMENT (exporter);
+
+ spectre_exporter_end (ps->exporter);
+}
+
+static EvFileExporterCapabilities
+ps_document_file_exporter_get_capabilities (EvFileExporter *exporter)
+{
+ return EV_FILE_EXPORTER_CAN_PAGE_SET |
+ EV_FILE_EXPORTER_CAN_COPIES |
+ EV_FILE_EXPORTER_CAN_COLLATE |
+ EV_FILE_EXPORTER_CAN_REVERSE |
+ EV_FILE_EXPORTER_CAN_GENERATE_PS |
+ EV_FILE_EXPORTER_CAN_GENERATE_PDF;
+}
+
+static void
+ps_document_file_exporter_iface_init (EvFileExporterInterface *iface)
+{
+ iface->begin = ps_document_file_exporter_begin;
+ iface->do_page = ps_document_file_exporter_do_page;
+ iface->end = ps_document_file_exporter_end;
+ iface->get_capabilities = ps_document_file_exporter_get_capabilities;
+}