restrict file types and add help text about game data

index.pug

@@ -12,7 +12,7 @@ html(lang="en-gb")
                 | pixsy
                 //img(alt="pixsy" src="includes/pixsy.png")
             p.
-                convert images to Bitsy rooms
+                version 0.72.7
                 |
                 #[a(href="http://tinybird.info/image-to-bitsy/old/" target="_blank") old version]
                 |
@@ -21,12 +21,30 @@ html(lang="en-gb")
                 #[a(href="https://twitter.com/synth_ruiner") twitter]
         .pages
             .page#start
+                p.
+                    #[b pixsy] is a tool for #[a(href="http://bitsy.org/") Bitsy Game Maker]
+                    that allows you to generate a room from an image and add it to your game.
+                p this version is compatible with Bitsy version 7.2 and earlier.
+                p.
+                    #[b pixsy] does not currently work via the Itch desktop program.
+                    some users are also currently reporting problems.
+                    if pixsy does not work for you, please try the
+                    #[a(href="http://tinybird.info/image-to-bitsy/old/") old version] instead.
+                p.
+                    instructions can be found on the
+                    #[a(href="https://ruin.itch.io/pixsy/") itch.io page] -
+                    scroll down to "how to use".
+
                 button.normal.pagination.next#new create a new bitsy game
                 button.normal.pagination.next#load load an existing bitsy game
             .page.game-data
                 h2 game data
 
-                input#game(type="file" autocomplete="off")
+                p.
+                    your game data is available from the #[i game data] window in bitsy,
+                    under the #[i tools] dropdown.
+
+                input#game(type="file" accept=".bitsy,.txt" autocomplete="off")
                 br
 
                 textarea#game-data(
@@ -78,11 +96,6 @@ html(lang="en-gb")
                                     | dither
                                 br
 
-                                label
-                                    input#filter(type="checkbox")
-                                    | filter
-                                br
-
                 button.pagination.prev#back-to-image previous
                 button.pagination.next#room-next add room
             .page.download

script.js

@@ -8,7 +8,6 @@ import init, {
     output,
     set_brightness,
     set_dither,
-    set_filter,
     set_palette,
     set_room_name,
 } from './pkg/pixsy.js';

src/lib.rs

@@ -33,7 +33,6 @@ struct State {
     room_name:  Option<String>,
     palette:    SelectedPalette,
     dither:     bool,
-    filter:     bool,
     brightness: i32,
 }
 
@@ -45,7 +44,6 @@ lazy_static! {
             room_name:  None,
             palette:    SelectedPalette::None,
             dither:     true,
-            filter:     false,
             brightness: 0,
         }
     );
@@ -133,12 +131,6 @@ pub fn set_dither(dither: bool) {
     state.dither = dither;
 }
 
-#[wasm_bindgen]
-pub fn set_filter(filter: bool) {
-    let mut state = STATE.lock().unwrap();
-    state.filter = filter;
-}
-
 #[wasm_bindgen]
 pub fn set_palette(palette_id: &str, background: String, foreground: String) {
     let mut state = STATE.lock().unwrap();