implement drawBitmap

README.md

@@ -368,9 +368,9 @@ They'll be available as `u8g.<font_name>` in Lua.
   - [ ] setCursorFont()
   - [ ] setCursorPos()
   - [ ] setCursorStyle()
-- [ ] Bitmaps
+- [x] Bitmaps
-  - [ ] drawBitmap()
+  - [x] drawBitmap()
-  - [ ] drawXBM()
+  - [x] drawXBM()
 - [ ] General functions
   - [x] begin()
   - [ ] print()

app/modules/u8g.c

@@ -596,6 +596,26 @@ static int lu8g_drawXBM( lua_State *L )
     return 0;
 }
 
+// Lua: u8g.drawBitmap( self, x, y, count, height, data )
+static int lu8g_drawBitmap( lua_State *L )
+{
+    lu8g_userdata_t *lud;
+
+    if ((lud = get_lud( L )) == NULL)
+        return 0;
+
+    u8g_uint_t args[4];
+    lu8g_get_int_args( L, 2, 4, args );
+
+    const char *bm_data = luaL_checkstring( L, (1+4) + 1 );
+    if (bm_data == NULL)
+        return 0;
+
+    u8g_DrawBitmap( lud, args[0], args[1], args[2], args[3], (const uint8_t *)bm_data );
+
+    return 0;
+}
+
 // Lua: u8g.setScale2x2( self )
 static int lu8g_setScale2x2( lua_State *L )
 {
@@ -951,6 +971,7 @@ static const LUA_REG_TYPE lu8g_display_map[] =
     { LSTRKEY( "drawPixel" ),  LFUNCVAL( lu8g_drawPixel ) },
     { LSTRKEY( "drawHLine" ),  LFUNCVAL( lu8g_drawHLine ) },
     { LSTRKEY( "drawVLine" ),  LFUNCVAL( lu8g_drawVLine ) },
+    { LSTRKEY( "drawBitmap" ),  LFUNCVAL( lu8g_drawBitmap ) },
     { LSTRKEY( "drawXBM" ),  LFUNCVAL( lu8g_drawXBM ) },
     { LSTRKEY( "setScale2x2" ),  LFUNCVAL( lu8g_setScale2x2 ) },
     { LSTRKEY( "undoScale" ),  LFUNCVAL( lu8g_undoScale ) },

lua_examples/u8g_bitmaps.lua

@@ -15,11 +15,11 @@ function xbm_picture()
      disp:drawXBM( 0, 20, 38, 24, xbm_data )
 end
 
-function bitmap_picture()
+function bitmap_picture(state)
      disp:setFont(u8g.font_6x10)
      disp:drawStr( 0, 10, "Bitmap picture")
 
-     --disp:drawXBM( 0, 20, 38, 24, bitmap_data )
+     disp:drawBitmap( 0 + (state * 10), 20 + (state * 4), 1, 8, bm_data )
 end
 
 -- the draw() routine
@@ -42,12 +42,17 @@ function bitmap_test()
      xbm_data = file.read()
      file.close()
 
+     -- read Bitmap picture
+     file.open("u8g_rook.bm", "r")
+     bm_data = file.read()
+     file.close()
+
      print("--- Starting Bitmap Test ---")
      dir = 0
      next_rotation = 0
 
      local draw_state
-     for draw_state = 1, 7 + 0*8, 1 do
+     for draw_state = 1, 7 + 1*8, 1 do
           disp:firstPage()
           repeat
                draw(draw_state)