diff options
Diffstat (limited to 'backend/ps/ev-spectre.c')
| -rw-r--r-- | backend/ps/ev-spectre.c | 473 |
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; +} |