djvu support rotation

ft/djvu/djvu.c

@@ -243,17 +243,39 @@ djvu_page_render(zathura_page_t* page)
       page_width, page_height, 3 * page_width, NULL, NULL);
 
   if(!pixbuf) {
-    free(buffer);
-    g_object_unref(pixbuf);
-    goto error_out;
+    goto error_free;
+  }
+
+  /* rotate page */
+  if(Zathura.document->rotate != 0) {
+    GdkPixbufRotation angle = GDK_PIXBUF_ROTATE_NONE;
+
+    switch(Zathura.document->rotate) {
+      case 90:
+        angle = GDK_PIXBUF_ROTATE_CLOCKWISE;
+        break;
+      case 180:
+        angle = GDK_PIXBUF_ROTATE_UPSIDEDOWN;
+        break;
+      case 270:
+        angle = GDK_PIXBUF_ROTATE_COUNTERCLOCKWISE;
+        break;
+      default:
+        goto error_free;
+    }
+
+    GdkPixbuf* pixbuf_temp = gdk_pixbuf_rotate_simple(pixbuf, Zathura.document->rotate);
+    if(!pixbuf_temp) {
+      goto error_free;
+    }
+
+    pixbuf = pixbuf_temp;
   }
 
   GtkWidget* image = gtk_image_new();
 
   if(!image) {
-    free(buffer);
-    g_object_unref(pixbuf);
-    goto error_out;
+    goto error_free;
   }
 
   gtk_image_set_from_pixbuf(GTK_IMAGE(image), pixbuf);
@@ -261,6 +283,11 @@ djvu_page_render(zathura_page_t* page)
 
   return image;
 
+error_free:
+
+    free(buffer);
+    g_object_unref(pixbuf);
+
 error_out:
 
   return NULL;

zathura.c

@@ -101,6 +101,26 @@ document_close()
   return true;
 }
 
+bool
+page_render(zathura_page_t* page)
+{
+  GtkWidget* image = zathura_page_render(page);
+  if(!image) {
+    goto error_out;
+  }
+
+  /* draw new rendered page */
+  if(!girara_set_view(Zathura.UI.session, image)) {
+    goto error_out;
+  }
+
+  return true;
+
+error_out:
+
+  return false;
+}
+
 bool
 page_set(unsigned int page_id)
 {
@@ -114,12 +134,12 @@ page_set(unsigned int page_id)
 
   /* render page */
   zathura_page_t* page = zathura_page_get(Zathura.document, page_id);
+
   if(!page) {
     goto error_out;
   }
 
-  GtkWidget* image = zathura_page_render(page);
-  if(!image) {
+  if(!page_render(page)) {
     zathura_page_free(page);
     fprintf(stderr, "error: rendering failed\n");
     goto error_out;
@@ -127,11 +147,6 @@ page_set(unsigned int page_id)
 
   zathura_page_free(page);
 
-  /* draw new rendered page */
-  if(!girara_set_view(Zathura.UI.session, image)) {
-    goto error_out;
-  }
-
   /* update page number */
   Zathura.document->current_page_number = page_id;