Merge pull request #68582 from bruvzg/inv_gd3_bmp_font

Add a special case for importing bitmap fonts designed for Godot 3.

scene/resources/font.cpp

@@ -1788,7 +1788,10 @@ Error FontFile::load_bitmap_font(const String &p_path) {
 								ERR_FAIL_V_MSG(ERR_CANT_CREATE, RTR("Unsupported BMFont texture format."));
 							}
 						} else {
-							if ((ch[0] == 0) && (ch[1] == 0) && (ch[2] == 0) && (ch[3] == 0)) { // RGBA8 color, no outline
+							if ((ch[3] == 0) && (ch[0] == 4) && (ch[1] == 4) && (ch[2] == 4) && img->get_format() == Image::FORMAT_RGBA8) { // might be RGBA8 color, no outline (color part of the image should be sold white, but some apps designed for Godot 3 generate color fonts with this config)
+								outline = 0;
+								set_texture_image(0, Vector2i(base_size, 0), page, img);
+							} else if ((ch[0] == 0) && (ch[1] == 0) && (ch[2] == 0) && (ch[3] == 0)) { // RGBA8 color, no outline
 								outline = 0;
 								ERR_FAIL_COND_V_MSG(img->get_format() != Image::FORMAT_RGBA8, ERR_FILE_CANT_READ, RTR("Unsupported BMFont texture format."));
 								set_texture_image(0, Vector2i(base_size, 0), page, img);