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[evince.git] / backend / tiff / tiff-document.c

diff --git a/backend/tiff/tiff-document.c b/backend/tiff/tiff-document.c
index fc8f4aaad3af684f151739111c2291516c37e2d1..aabcd6dee23030259ba34e14603e2be9fc862ef9 100644 (file)
--- a/backend/tiff/tiff-document.c
+++ b/backend/tiff/tiff-document.c
@@ -25,7 +25,7 @@
 #include <config.h>
 #include <stdio.h>
 #include <glib.h>
-#include <glib/gi18n.h>
+#include <glib/gi18n-lib.h>
 
 #include "tiffio.h"
 #include "tiff2ps.h"
@@ -37,12 +37,12 @@
 
 struct _TiffDocumentClass
 {
-  GObjectClass parent_class;
+  EvDocumentClass parent_class;
 };
 
 struct _TiffDocument
 {
-  GObject parent_instance;
+  EvDocument parent_instance;
 
   TIFF *tiff;
   gint n_pages;
@@ -53,7 +53,6 @@ struct _TiffDocument
 
 typedef struct _TiffDocumentClass TiffDocumentClass;
 
-static void tiff_document_document_iface_init (EvDocumentIface *iface);
 static void tiff_document_document_thumbnails_iface_init (EvDocumentThumbnailsIface *iface);
 static void tiff_document_document_file_exporter_iface_init (EvFileExporterIface *iface);
 
@@ -91,13 +90,11 @@ tiff_document_load (EvDocument  *document,
        gchar *filename;
        TIFF *tiff;
        
-       push_handlers ();
        filename = g_filename_from_uri (uri, NULL, error);
-       if (!filename) {
-               pop_handlers ();
+       if (!filename)
                return FALSE;
-       }
        
+       push_handlers ();
        tiff = TIFFOpen (filename, "r");
        if (tiff) {
                guint32 w, h;
@@ -109,6 +106,13 @@ tiff_document_load (EvDocument  *document,
        
        if (!tiff) {
                pop_handlers ();
+
+               g_set_error_literal (error,
+                                    EV_DOCUMENT_ERROR,
+                                    EV_DOCUMENT_ERROR_INVALID,
+                                    _("Invalid document"));
+
+               g_free (filename);
                return FALSE;
        }
        
@@ -215,6 +219,7 @@ tiff_document_render (EvDocument      *document,
        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;
@@ -238,6 +243,10 @@ tiff_document_render (EvDocument      *document,
                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 ();
@@ -250,10 +259,10 @@ tiff_document_render (EvDocument      *document,
        rowstride = cairo_format_stride_for_width (CAIRO_FORMAT_RGB24, width);
 #else
        rowstride = width * 4;
+#endif
        if (rowstride / 4 != width)
-               /* overflow */
+               /* overflow, or cairo was changed in an unsupported way */
                return NULL;                
-#endif
        
        bytes = height * rowstride;
        if (bytes / rowstride != height)
@@ -274,7 +283,7 @@ tiff_document_render (EvDocument      *document,
        TIFFReadRGBAImageOriented (tiff_document->tiff,
                                   width, height,
                                   (uint32 *)pixels,
-                                  ORIENTATION_TOPLEFT, 1);
+                                  orientation, 1);
        pop_handlers ();
 
        /* Convert the format returned by libtiff to
@@ -282,16 +291,15 @@ tiff_document_render (EvDocument      *document,
        */
        p = pixels;
        while (p < pixels + bytes) {
-               uint32 pixel = *(uint32 *)p;
-               int r = TIFFGetR(pixel);
-               int g = TIFFGetG(pixel);
-               int b = TIFFGetB(pixel);
-               int a = TIFFGetA(pixel);
-               
-               *p++ = b;
-               *p++ = g;
-               *p++ = r;
-               *p++ = a;
+               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,
@@ -375,6 +383,21 @@ tiff_document_render_pixbuf (EvDocument      *document,
        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)
 {
@@ -391,31 +414,17 @@ tiff_document_finalize (GObject *object)
 static void
 tiff_document_class_init (TiffDocumentClass *klass)
 {
-       GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
+       GObjectClass    *gobject_class = G_OBJECT_CLASS (klass);
+       EvDocumentClass *ev_document_class = EV_DOCUMENT_CLASS (klass);
 
        gobject_class->finalize = tiff_document_finalize;
-}
 
-static EvDocumentInfo *
-tiff_document_get_info (EvDocument *document)
-{
-       EvDocumentInfo *info;
-
-       info = g_new0 (EvDocumentInfo, 1);
-       info->fields_mask = 0;
-
-       return info;
-}
-
-static void
-tiff_document_document_iface_init (EvDocumentIface *iface)
-{
-       iface->load = tiff_document_load;
-       iface->save = tiff_document_save;
-       iface->get_n_pages = tiff_document_get_n_pages;
-       iface->get_page_size = tiff_document_get_page_size;
-       iface->render = tiff_document_render;
-       iface->get_info = tiff_document_get_info;
+       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 *