1 files changed, 533 insertions, 0 deletions
diff --git a/backend/tiff/tiff-document.c b/backend/tiff/tiff-document.c
new file mode 100644
index 00000000..9c113b49
--- /dev/null
+++ b/backend/tiff/tiff-document.c
@@ -0,0 +1,533 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8; c-indent-level: 8 -*- */
+/*
+ * Copyright (C) 2005, Jonathan Blandford <[email protected]>
+ *
+ * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+/* FIXME: Should probably buffer calls to libtiff with TIFFSetWarningHandler
+ */
+
+#include "config.h"
+
+#include <config.h>
+#include <stdio.h>
+#include <glib.h>
+#include <glib/gi18n-lib.h>
+
+#include "tiffio.h"
+#include "tiff2ps.h"
+#include "tiff-document.h"
+#include "ev-document-misc.h"
+#include "ev-document-thumbnails.h"
+#include "ev-file-exporter.h"
+#include "ev-file-helpers.h"
+
+struct _TiffDocumentClass
+{
+ EvDocumentClass parent_class;
+};
+
+struct _TiffDocument
+{
+ EvDocument parent_instance;
+
+ TIFF *tiff;
+ gint n_pages;
+ TIFF2PSContext *ps_export_ctx;
+ 
+ gchar *uri;
+};
+
+typedef struct _TiffDocumentClass TiffDocumentClass;
+
+static void tiff_document_document_thumbnails_iface_init (EvDocumentThumbnailsInterface *iface);
+static void tiff_document_document_file_exporter_iface_init (EvFileExporterInterface *iface);
+
+EV_BACKEND_REGISTER_WITH_CODE (TiffDocument, tiff_document,
+ {
+ EV_BACKEND_IMPLEMENT_INTERFACE (EV_TYPE_DOCUMENT_THUMBNAILS,
+ tiff_document_document_thumbnails_iface_init);
+ EV_BACKEND_IMPLEMENT_INTERFACE (EV_TYPE_FILE_EXPORTER,
+ tiff_document_document_file_exporter_iface_init);
+ });
+
+static TIFFErrorHandler orig_error_handler = NULL;
+static TIFFErrorHandler orig_warning_handler = NULL;
+
+static void
+push_handlers (void)
+{
+ orig_error_handler = TIFFSetErrorHandler (NULL);
+ orig_warning_handler = TIFFSetWarningHandler (NULL);
+}
+
+static void
+pop_handlers (void)
+{
+ TIFFSetErrorHandler (orig_error_handler);
+ TIFFSetWarningHandler (orig_warning_handler);
+}
+
+static gboolean
+tiff_document_load (EvDocument *document,
+ const char *uri,
+ GError **error)
+{
+ TiffDocument *tiff_document = TIFF_DOCUMENT (document);
+ gchar *filename;
+ TIFF *tiff;
+ 
+ filename = g_filename_from_uri (uri, NULL, error);
+ if (!filename)
+ return FALSE;
+ 
+ push_handlers ();
+ tiff = TIFFOpen (filename, "r");
+ if (tiff) {
+ guint32 w, h;
+ 
+ /* FIXME: unused data? why bother here */
+ TIFFGetField(tiff, TIFFTAG_IMAGEWIDTH, &w);
+ TIFFGetField(tiff, TIFFTAG_IMAGELENGTH, &h);
+ }
+ 
+ if (!tiff) {
+ pop_handlers ();
+
+ g_set_error_literal (error,
+ EV_DOCUMENT_ERROR,
+ EV_DOCUMENT_ERROR_INVALID,
+ _("Invalid document"));
+
+ g_free (filename);
+ return FALSE;
+ }
+ 
+ tiff_document->tiff = tiff;
+ g_free (tiff_document->uri);
+ g_free (filename);
+ tiff_document->uri = g_strdup (uri);
+ 
+ pop_handlers ();
+ return TRUE;
+}
+
+static gboolean
+tiff_document_save (EvDocument *document,
+ const char *uri,
+ GError **error)
+{ 
+ TiffDocument *tiff_document = TIFF_DOCUMENT (document);
+
+ return ev_xfer_uri_simple (tiff_document->uri, uri, error); 
+}
+
+static int
+tiff_document_get_n_pages (EvDocument *document)
+{
+ TiffDocument *tiff_document = TIFF_DOCUMENT (document);
+ 
+ g_return_val_if_fail (TIFF_IS_DOCUMENT (document), 0);
+ g_return_val_if_fail (tiff_document->tiff != NULL, 0);
+ 
+ if (tiff_document->n_pages == -1) {
+ push_handlers ();
+ tiff_document->n_pages = 0;
+ 
+ do {
+ tiff_document->n_pages ++;
+ }
+ while (TIFFReadDirectory (tiff_document->tiff));
+ pop_handlers ();
+ }
+
+ return tiff_document->n_pages;
+}
+
+static void
+tiff_document_get_resolution (TiffDocument *tiff_document,
+ gfloat *x_res,
+ gfloat *y_res)
+{
+ gfloat x = 72.0, y = 72.0;
+ gushort unit;
+ 
+ if (TIFFGetField (tiff_document->tiff, TIFFTAG_XRESOLUTION, &x) &&
+ TIFFGetField (tiff_document->tiff, TIFFTAG_YRESOLUTION, &y)) {
+ if (TIFFGetFieldDefaulted (tiff_document->tiff, TIFFTAG_RESOLUTIONUNIT, &unit)) {
+ if (unit == RESUNIT_CENTIMETER) {
+ x *= 2.54;
+ y *= 2.54;
+ }
+ }
+ }
+
+ *x_res = x;
+ *y_res = y;
+}
+
+static void
+tiff_document_get_page_size (EvDocument *document,
+ EvPage *page,
+ double *width,
+ double *height)
+{
+ guint32 w, h;
+ gfloat x_res, y_res;
+ TiffDocument *tiff_document = TIFF_DOCUMENT (document);
+ 
+ g_return_if_fail (TIFF_IS_DOCUMENT (document));
+ g_return_if_fail (tiff_document->tiff != NULL);
+ 
+ push_handlers ();
+ if (TIFFSetDirectory (tiff_document->tiff, page->index) != 1) {
+ pop_handlers ();
+ return;
+ }
+ 
+ TIFFGetField (tiff_document->tiff, TIFFTAG_IMAGEWIDTH, &w);
+ TIFFGetField (tiff_document->tiff, TIFFTAG_IMAGELENGTH, &h);
+ tiff_document_get_resolution (tiff_document, &x_res, &y_res);
+ h = h * (x_res / y_res);
+ 
+ *width = w;
+ *height = h;
+ 
+ pop_handlers ();
+}
+
+static cairo_surface_t *
+tiff_document_render (EvDocument *document,
+ EvRenderContext *rc)
+{
+ TiffDocument *tiff_document = TIFF_DOCUMENT (document);
+ int width, height;
+ float x_res, y_res;
+ gint rowstride, bytes;
+ guchar *pixels = NULL;
+ guchar *p;
+ int orientation;
+ cairo_surface_t *surface;
+ cairo_surface_t *rotated_surface;
+ static const cairo_user_data_key_t key;
+ 
+ g_return_val_if_fail (TIFF_IS_DOCUMENT (document), NULL);
+ g_return_val_if_fail (tiff_document->tiff != NULL, NULL);
+ 
+ push_handlers ();
+ if (TIFFSetDirectory (tiff_document->tiff, rc->page->index) != 1) {
+ pop_handlers ();
+ return NULL;
+ }
+
+ if (!TIFFGetField (tiff_document->tiff, TIFFTAG_IMAGEWIDTH, &width)) {
+ pop_handlers ();
+ return NULL;
+ }
+
+ if (! TIFFGetField (tiff_document->tiff, TIFFTAG_IMAGELENGTH, &height)) {
+ pop_handlers ();
+ return NULL;
+ }
+
+ if (! TIFFGetField (tiff_document->tiff, TIFFTAG_ORIENTATION, &orientation)) {
+ orientation = ORIENTATION_TOPLEFT;
+ }
+
+ tiff_document_get_resolution (tiff_document, &x_res, &y_res);
+ 
+ pop_handlers ();
+ 
+ /* Sanity check the doc */
+ if (width <= 0 || height <= 0)
+ return NULL; 
+
+#ifdef HAVE_CAIRO_FORMAT_STRIDE_FOR_WIDTH
+ rowstride = cairo_format_stride_for_width (CAIRO_FORMAT_RGB24, width);
+#else
+ rowstride = width * 4;
+#endif
+ if (rowstride / 4 != width)
+ /* overflow, or cairo was changed in an unsupported way */
+ return NULL; 
+ 
+ bytes = height * rowstride;
+ if (bytes / rowstride != height)
+ /* overflow */
+ return NULL; 
+ 
+ pixels = g_try_malloc (bytes);
+ if (!pixels)
+ return NULL;
+ 
+ surface = cairo_image_surface_create_for_data (pixels,
+ CAIRO_FORMAT_RGB24,
+ width, height,
+ rowstride);
+ cairo_surface_set_user_data (surface, &key,
+ pixels, (cairo_destroy_func_t)g_free);
+
+ TIFFReadRGBAImageOriented (tiff_document->tiff,
+ width, height,
+ (uint32 *)pixels,
+ orientation, 1);
+ pop_handlers ();
+
+ /* Convert the format returned by libtiff to
+ * what cairo expects
+ */
+ p = pixels;
+ while (p < pixels + bytes) {
+ guint32 *pixel = (guint32*)p;
+ guint8 r = TIFFGetR(*pixel);
+ guint8 g = TIFFGetG(*pixel);
+ guint8 b = TIFFGetB(*pixel);
+ guint8 a = TIFFGetA(*pixel);
+
+ *pixel = (a << 24) | (r << 16) | (g << 8) | b;
+
+ p += 4;
+ }
+
+ rotated_surface = ev_document_misc_surface_rotate_and_scale (surface,
+ (width * rc->scale) + 0.5,
+ (height * rc->scale * (x_res / y_res)) + 0.5,
+ rc->rotation);
+ cairo_surface_destroy (surface);
+ 
+ return rotated_surface;
+}
+
+static GdkPixbuf *
+tiff_document_render_pixbuf (EvDocument *document,
+ EvRenderContext *rc)
+{
+ TiffDocument *tiff_document = TIFF_DOCUMENT (document);
+ int width, height;
+ float x_res, y_res;
+ gint rowstride, bytes;
+ guchar *pixels = NULL;
+ GdkPixbuf *pixbuf;
+ GdkPixbuf *scaled_pixbuf;
+ GdkPixbuf *rotated_pixbuf;
+ 
+ push_handlers ();
+ if (TIFFSetDirectory (tiff_document->tiff, rc->page->index) != 1) {
+ pop_handlers ();
+ return NULL;
+ }
+
+ if (!TIFFGetField (tiff_document->tiff, TIFFTAG_IMAGEWIDTH, &width)) {
+ pop_handlers ();
+ return NULL;
+ }
+
+ if (! TIFFGetField (tiff_document->tiff, TIFFTAG_IMAGELENGTH, &height)) {
+ pop_handlers ();
+ return NULL;
+ }
+
+ tiff_document_get_resolution (tiff_document, &x_res, &y_res);
+ 
+ pop_handlers ();
+ 
+ /* Sanity check the doc */
+ if (width <= 0 || height <= 0)
+ return NULL; 
+
+ rowstride = width * 4;
+ if (rowstride / 4 != width)
+ /* overflow */
+ return NULL; 
+ 
+ bytes = height * rowstride;
+ if (bytes / rowstride != height)
+ /* overflow */
+ return NULL; 
+ 
+ pixels = g_try_malloc (bytes);
+ if (!pixels)
+ return NULL;
+ 
+ pixbuf = gdk_pixbuf_new_from_data (pixels, GDK_COLORSPACE_RGB, TRUE, 8, 
+ width, height, rowstride,
+ (GdkPixbufDestroyNotify) g_free, NULL);
+ TIFFReadRGBAImageOriented (tiff_document->tiff,
+ width, height,
+ (uint32 *)pixels,
+ ORIENTATION_TOPLEFT, 1);
+ pop_handlers ();
+
+ scaled_pixbuf = gdk_pixbuf_scale_simple (pixbuf,
+ width * rc->scale,
+ height * rc->scale * (x_res / y_res),
+ GDK_INTERP_BILINEAR);
+ g_object_unref (pixbuf);
+ 
+ rotated_pixbuf = gdk_pixbuf_rotate_simple (scaled_pixbuf, 360 - rc->rotation);
+ g_object_unref (scaled_pixbuf);
+ 
+ return rotated_pixbuf;
+}
+
+static gchar *
+tiff_document_get_page_label (EvDocument *document,
+ EvPage *page)
+{
+ TiffDocument *tiff_document = TIFF_DOCUMENT (document);
+ static gchar *label;
+
+ if (TIFFGetField (tiff_document->tiff, TIFFTAG_PAGENAME, &label) &&
+ g_utf8_validate (label, -1, NULL)) {
+ return g_strdup (label);
+ }
+
+ return NULL;
+}
+
+static void
+tiff_document_finalize (GObject *object)
+{
+ TiffDocument *tiff_document = TIFF_DOCUMENT (object);
+
+ if (tiff_document->tiff)
+ TIFFClose (tiff_document->tiff);
+ if (tiff_document->uri)
+ g_free (tiff_document->uri);
+
+ G_OBJECT_CLASS (tiff_document_parent_class)->finalize (object);
+}
+
+static void
+tiff_document_class_init (TiffDocumentClass *klass)
+{
+ GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
+ EvDocumentClass *ev_document_class = EV_DOCUMENT_CLASS (klass);
+
+ gobject_class->finalize = tiff_document_finalize;
+
+ ev_document_class->load = tiff_document_load;
+ ev_document_class->save = tiff_document_save;
+ ev_document_class->get_n_pages = tiff_document_get_n_pages;
+ ev_document_class->get_page_size = tiff_document_get_page_size;
+ ev_document_class->render = tiff_document_render;
+ ev_document_class->get_page_label = tiff_document_get_page_label;
+}
+
+static GdkPixbuf *
+tiff_document_thumbnails_get_thumbnail (EvDocumentThumbnails *document,
+ EvRenderContext *rc, 
+ gboolean border)
+{
+ GdkPixbuf *pixbuf;
+
+ pixbuf = tiff_document_render_pixbuf (EV_DOCUMENT (document), rc);
+ 
+ if (border) {
+ GdkPixbuf *tmp_pixbuf = pixbuf;
+ 
+ pixbuf = ev_document_misc_get_thumbnail_frame (-1, -1, tmp_pixbuf);
+ g_object_unref (tmp_pixbuf);
+ }
+ 
+ return pixbuf;
+}
+
+static void
+tiff_document_thumbnails_get_dimensions (EvDocumentThumbnails *document,
+ EvRenderContext *rc, 
+ gint *width,
+ gint *height)
+{
+ gdouble page_width, page_height;
+
+ tiff_document_get_page_size (EV_DOCUMENT (document),
+ 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
+tiff_document_document_thumbnails_iface_init (EvDocumentThumbnailsInterface *iface)
+{
+ iface->get_thumbnail = tiff_document_thumbnails_get_thumbnail;
+ iface->get_dimensions = tiff_document_thumbnails_get_dimensions;
+}
+
+/* postscript exporter implementation */
+static void
+tiff_document_file_exporter_begin (EvFileExporter *exporter,
+ EvFileExporterContext *fc)
+{
+ TiffDocument *document = TIFF_DOCUMENT (exporter);
+
+ document->ps_export_ctx = tiff2ps_context_new(fc->filename);
+}
+
+static void
+tiff_document_file_exporter_do_page (EvFileExporter *exporter, EvRenderContext *rc)
+{
+ TiffDocument *document = TIFF_DOCUMENT (exporter);
+
+ if (document->ps_export_ctx == NULL)
+ return;
+ if (TIFFSetDirectory (document->tiff, rc->page->index) != 1)
+ return;
+ tiff2ps_process_page (document->ps_export_ctx, document->tiff,
+ 0, 0, 0, 0, 0);
+}
+
+static void
+tiff_document_file_exporter_end (EvFileExporter *exporter)
+{
+ TiffDocument *document = TIFF_DOCUMENT (exporter);
+
+ if (document->ps_export_ctx == NULL)
+ return;
+ tiff2ps_context_finalize(document->ps_export_ctx);
+}
+
+static EvFileExporterCapabilities
+tiff_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;
+}
+
+static void
+tiff_document_document_file_exporter_iface_init (EvFileExporterInterface *iface)
+{
+ iface->begin = tiff_document_file_exporter_begin;
+ iface->do_page = tiff_document_file_exporter_do_page;
+ iface->end = tiff_document_file_exporter_end;
+ iface->get_capabilities = tiff_document_file_exporter_get_capabilities;
+}
+
+static void
+tiff_document_init (TiffDocument *tiff_document)
+{
+ tiff_document->n_pages = -1;
+}