Editor and Gui improvements

src/app/gfx/bitmap.h

@@ -107,6 +107,8 @@ class Bitmap {
   auto data() const { return data_.data(); }
   auto mutable_data() { return data_; }
   auto mutable_pixel_data() { return pixel_data_; }
+  auto surface() const { return surface_.get(); }
+  auto mutable_surface() { return surface_.get(); }
 
   auto vector() const { return data_; }
   auto at(int i) const { return data_[i]; }

src/app/gfx/snes_palette.cc

@@ -214,6 +214,9 @@ SNESPalette ReadPaletteFromROM(int offset, int num_colors, const uchar* rom) {
     new_color.green = ((color >> 5) & 0x1F) * 8;
     new_color.blue = ((color >> 10) & 0x1F) * 8;
     colors[color_offset].SetSNES(ConvertRGBtoSNES(new_color));
+    if (color_offset == 0) {
+      colors[color_offset].SetTransparent(true);
+    }
     color_offset++;
     offset += 2;
   }