implement drawXBM

app/modules/u8g.c

@@ -576,6 +576,26 @@ static int lu8g_drawVLine( lua_State *L )
     return 0;
 }
 
+// Lua: u8g.drawXBM( self, x, y, width, height, data )
+static int lu8g_drawXBM( 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 *xbm_data = luaL_checkstring( L, (1+4) + 1 );
+    if (xbm_data == NULL)
+        return 0;
+
+    u8g_DrawXBM( lud, args[0], args[1], args[2], args[3], (const uint8_t *)xbm_data );
+
+    return 0;
+}
+
 // Lua: u8g.setScale2x2( self )
 static int lu8g_setScale2x2( lua_State *L )
 {
@@ -931,6 +951,7 @@ static const LUA_REG_TYPE lu8g_display_map[] =
     { LSTRKEY( "drawPixel" ),  LFUNCVAL( lu8g_drawPixel ) },
     { LSTRKEY( "drawHLine" ),  LFUNCVAL( lu8g_drawHLine ) },
     { LSTRKEY( "drawVLine" ),  LFUNCVAL( lu8g_drawVLine ) },
+    { LSTRKEY( "drawXBM" ),  LFUNCVAL( lu8g_drawXBM ) },
     { LSTRKEY( "setScale2x2" ),  LFUNCVAL( lu8g_setScale2x2 ) },
     { LSTRKEY( "undoScale" ),  LFUNCVAL( lu8g_undoScale ) },
     { LSTRKEY( "firstPage" ),  LFUNCVAL( lu8g_firstPage ) },

lua_examples/u8g_bitmaps.lua

@@ -0,0 +1,62 @@
+
+-- setup I2c and connect display
+function init_i2c_display()
+     sda = 5
+     scl = 6
+     sla = 0x3c
+     i2c.setup(0, sda, scl, i2c.SLOW)
+     disp = u8g.ssd1306_128x64_i2c(sla)
+end
+
+function xbm_picture()
+     disp:setFont(u8g.font_6x10)
+     disp:drawStr( 0, 10, "XBM picture")
+
+     disp:drawXBM( 0, 20, 38, 24, xbm_data )
+end
+
+function bitmap_picture()
+     disp:setFont(u8g.font_6x10)
+     disp:drawStr( 0, 10, "Bitmap picture")
+
+     --disp:drawXBM( 0, 20, 38, 24, bitmap_data )
+end
+
+-- the draw() routine
+function draw(draw_state)
+     local component = bit.rshift(draw_state, 3)
+
+     if (component == 0) then
+          xbm_picture(bit.band(draw_state, 7))
+     elseif (component == 1) then
+          bitmap_picture(bit.band(draw_state, 7))
+     end
+end
+
+
+function bitmap_test()
+     init_i2c_display()
+
+     -- read XBM picture
+     file.open("u8glib_logo.xbm", "r")
+     xbm_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
+          disp:firstPage()
+          repeat
+               draw(draw_state)
+          until disp:nextPage() == false
+
+          tmr.wdclr()
+     end
+
+     print("--- Bitmap Test done ---")
+end
+
+bitmap_test()