Add font LCD sub-pixel anti-aliasing support.

2 files changed, 228 insertions, 46 deletions

diff --git a/modules/text_server_fb/text_server_fb.cpp b/modules/text_server_fb/text_server_fb.cpp
index 3f5041234c..6fae75f49c 100644
--- a/modules/text_server_fb/text_server_fb.cpp
+++ b/modules/text_server_fb/text_server_fb.cpp
@@ -34,6 +34,7 @@
 // Headers for building as GDExtension plug-in.
 
 #include <godot_cpp/classes/file.hpp>
+#include <godot_cpp/classes/project_settings.hpp>
 #include <godot_cpp/classes/rendering_server.hpp>
 #include <godot_cpp/classes/translation_server.hpp>
 #include <godot_cpp/core/error_macros.hpp>
@@ -43,6 +44,7 @@ using namespace godot;
 #else
 // Headers for building as built-in module.
 
+#include "core/config/project_settings.h"
 #include "core/error/error_macros.h"
 #include "core/string/print_string.h"
 #include "core/string/ucaps.h"
@@ -209,6 +211,10 @@ _FORCE_INLINE_ TextServerFallback::FontTexturePosition TextServerFallback::find_
 	for (int i = 0; i < p_data->textures.size(); i++) {
 		const FontTexture &ct = p_data->textures[i];
 
+		if (p_image_format != ct.format) {
+			continue;
+		}
+
 		if (mw > ct.texture_w || mh > ct.texture_h) { // Too big for this texture.
 			continue;
 		}
@@ -500,9 +506,28 @@ _FORCE_INLINE_ TextServerFallback::FontGlyph TextServerFallback::rasterize_msdf(
 #endif
 
 #ifdef MODULE_FREETYPE_ENABLED
-_FORCE_INLINE_ TextServerFallback::FontGlyph TextServerFallback::rasterize_bitmap(FontForSizeFallback *p_data, int p_rect_margin, FT_Bitmap bitmap, int yofs, int xofs, const Vector2 &advance) const {
+_FORCE_INLINE_ TextServerFallback::FontGlyph TextServerFallback::rasterize_bitmap(FontForSizeFallback *p_data, int p_rect_margin, FT_Bitmap bitmap, int yofs, int xofs, const Vector2 &advance, bool p_bgra) const {
 	int w = bitmap.width;
 	int h = bitmap.rows;
+	int color_size = 2;
+
+	switch (bitmap.pixel_mode) {
+		case FT_PIXEL_MODE_MONO:
+		case FT_PIXEL_MODE_GRAY: {
+			color_size = 2;
+		} break;
+		case FT_PIXEL_MODE_BGRA: {
+			color_size = 4;
+		} break;
+		case FT_PIXEL_MODE_LCD: {
+			color_size = 4;
+			w /= 3;
+		} break;
+		case FT_PIXEL_MODE_LCD_V: {
+			color_size = 4;
+			h /= 3;
+		} break;
+	}
 
 	int mw = w + p_rect_margin * 4;
 	int mh = h + p_rect_margin * 4;
@@ -510,7 +535,6 @@ _FORCE_INLINE_ TextServerFallback::FontGlyph TextServerFallback::rasterize_bitma
 	ERR_FAIL_COND_V(mw > 4096, FontGlyph());
 	ERR_FAIL_COND_V(mh > 4096, FontGlyph());
 
-	int color_size = bitmap.pixel_mode == FT_PIXEL_MODE_BGRA ? 4 : 2;
 	Image::Format require_format = color_size == 4 ? Image::FORMAT_RGBA8 : Image::FORMAT_LA8;
 
 	FontTexturePosition tex_pos = find_texture_pos_for_glyph(p_data, color_size, require_format, mw, mh, false);
@@ -545,6 +569,34 @@ _FORCE_INLINE_ TextServerFallback::FontGlyph TextServerFallback::rasterize_bitma
 						wr[ofs + 0] = bitmap.buffer[ofs_color + 2];
 						wr[ofs + 3] = bitmap.buffer[ofs_color + 3];
 					} break;
+					case FT_PIXEL_MODE_LCD: {
+						int ofs_color = i * bitmap.pitch + (j * 3);
+						if (p_bgra) {
+							wr[ofs + 0] = bitmap.buffer[ofs_color + 0];
+							wr[ofs + 1] = bitmap.buffer[ofs_color + 1];
+							wr[ofs + 2] = bitmap.buffer[ofs_color + 2];
+							wr[ofs + 3] = 255;
+						} else {
+							wr[ofs + 0] = bitmap.buffer[ofs_color + 2];
+							wr[ofs + 1] = bitmap.buffer[ofs_color + 1];
+							wr[ofs + 2] = bitmap.buffer[ofs_color + 0];
+							wr[ofs + 3] = 255;
+						}
+					} break;
+					case FT_PIXEL_MODE_LCD_V: {
+						int ofs_color = i * bitmap.pitch * 3 + j;
+						if (p_bgra) {
+							wr[ofs + 0] = bitmap.buffer[ofs_color + bitmap.pitch * 2];
+							wr[ofs + 1] = bitmap.buffer[ofs_color + bitmap.pitch];
+							wr[ofs + 2] = bitmap.buffer[ofs_color + 0];
+							wr[ofs + 3] = 255;
+						} else {
+							wr[ofs + 0] = bitmap.buffer[ofs_color + 0];
+							wr[ofs + 1] = bitmap.buffer[ofs_color + bitmap.pitch];
+							wr[ofs + 2] = bitmap.buffer[ofs_color + bitmap.pitch * 2];
+							wr[ofs + 3] = 255;
+						}
+					} break;
 					default:
 						ERR_FAIL_V_MSG(FontGlyph(), "Font uses unsupported pixel format: " + String::num_int64(bitmap.pixel_mode) + ".");
 						break;
@@ -650,9 +702,44 @@ _FORCE_INLINE_ bool TextServerFallback::_ensure_glyph(FontFallback *p_font_data,
 			FT_Outline_Transform(&fd->face->glyph->outline, &mat);
 		}
 
+		FT_Render_Mode aa_mode = FT_RENDER_MODE_NORMAL;
+		bool bgra = false;
+		switch (p_font_data->antialiasing) {
+			case FONT_ANTIALIASING_NONE: {
+				aa_mode = FT_RENDER_MODE_MONO;
+			} break;
+			case FONT_ANTIALIASING_GRAY: {
+				aa_mode = FT_RENDER_MODE_NORMAL;
+			} break;
+			case FONT_ANTIALIASING_LCD: {
+				int aa_layout = (int)((p_glyph >> 24) & 7);
+				switch (aa_layout) {
+					case FONT_LCD_SUBPIXEL_LAYOUT_HRGB: {
+						aa_mode = FT_RENDER_MODE_LCD;
+						bgra = false;
+					} break;
+					case FONT_LCD_SUBPIXEL_LAYOUT_HBGR: {
+						aa_mode = FT_RENDER_MODE_LCD;
+						bgra = true;
+					} break;
+					case FONT_LCD_SUBPIXEL_LAYOUT_VRGB: {
+						aa_mode = FT_RENDER_MODE_LCD_V;
+						bgra = false;
+					} break;
+					case FONT_LCD_SUBPIXEL_LAYOUT_VBGR: {
+						aa_mode = FT_RENDER_MODE_LCD_V;
+						bgra = true;
+					} break;
+					default: {
+						aa_mode = FT_RENDER_MODE_NORMAL;
+					} break;
+				}
+			} break;
+		}
+
 		if (!outline) {
 			if (!p_font_data->msdf) {
-				error = FT_Render_Glyph(fd->face->glyph, p_font_data->antialiased ? FT_RENDER_MODE_NORMAL : FT_RENDER_MODE_MONO);
+				error = FT_Render_Glyph(fd->face->glyph, aa_mode);
 			}
 			FT_GlyphSlot slot = fd->face->glyph;
 			if (!error) {
@@ -664,7 +751,7 @@ _FORCE_INLINE_ bool TextServerFallback::_ensure_glyph(FontFallback *p_font_data,
 					ERR_FAIL_V_MSG(false, "Compiled without MSDFGEN support!");
 #endif
 				} else {
-					gl = rasterize_bitmap(fd, rect_range, slot->bitmap, slot->bitmap_top, slot->bitmap_left, Vector2((h + (1 << 9)) >> 10, (v + (1 << 9)) >> 10) / 64.0);
+					gl = rasterize_bitmap(fd, rect_range, slot->bitmap, slot->bitmap_top, slot->bitmap_left, Vector2((h + (1 << 9)) >> 10, (v + (1 << 9)) >> 10) / 64.0, bgra);
 				}
 			}
 		} else {
@@ -684,11 +771,11 @@ _FORCE_INLINE_ bool TextServerFallback::_ensure_glyph(FontFallback *p_font_data,
 			if (FT_Glyph_Stroke(&glyph, stroker, 1) != 0) {
 				goto cleanup_glyph;
 			}
-			if (FT_Glyph_To_Bitmap(&glyph, p_font_data->antialiased ? FT_RENDER_MODE_NORMAL : FT_RENDER_MODE_MONO, nullptr, 1) != 0) {
+			if (FT_Glyph_To_Bitmap(&glyph, aa_mode, nullptr, 1) != 0) {
 				goto cleanup_glyph;
 			}
 			glyph_bitmap = (FT_BitmapGlyph)glyph;
-			gl = rasterize_bitmap(fd, rect_range, glyph_bitmap->bitmap, glyph_bitmap->top, glyph_bitmap->left, Vector2());
+			gl = rasterize_bitmap(fd, rect_range, glyph_bitmap->bitmap, glyph_bitmap->top, glyph_bitmap->left, Vector2(), bgra);
 
 		cleanup_glyph:
 			FT_Done_Glyph(glyph);
@@ -1014,23 +1101,23 @@ String TextServerFallback::font_get_name(const RID &p_font_rid) const {
 	return fd->font_name;
 }
 
-void TextServerFallback::font_set_antialiased(const RID &p_font_rid, bool p_antialiased) {
+void TextServerFallback::font_set_antialiasing(RID p_font_rid, TextServer::FontAntialiasing p_antialiasing) {
 	FontFallback *fd = font_owner.get_or_null(p_font_rid);
 	ERR_FAIL_COND(!fd);
 
 	MutexLock lock(fd->mutex);
-	if (fd->antialiased != p_antialiased) {
+	if (fd->antialiasing != p_antialiasing) {
 		_font_clear_cache(fd);
-		fd->antialiased = p_antialiased;
+		fd->antialiasing = p_antialiasing;
 	}
 }
 
-bool TextServerFallback::font_is_antialiased(const RID &p_font_rid) const {
+TextServer::FontAntialiasing TextServerFallback::font_get_antialiasing(RID p_font_rid) const {
 	FontFallback *fd = font_owner.get_or_null(p_font_rid);
-	ERR_FAIL_COND_V(!fd, false);
+	ERR_FAIL_COND_V(!fd, TextServer::FONT_ANTIALIASING_NONE);
 
 	MutexLock lock(fd->mutex);
-	return fd->antialiased;
+	return fd->antialiasing;
 }
 
 void TextServerFallback::font_set_generate_mipmaps(const RID &p_font_rid, bool p_generate_mipmaps) {
@@ -1589,7 +1676,16 @@ Vector2 TextServerFallback::font_get_glyph_advance(const RID &p_font_rid, int64_
 	Vector2i size = _get_size(fd, p_size);
 
 	ERR_FAIL_COND_V(!_ensure_cache_for_size(fd, size), Vector2());
-	if (!_ensure_glyph(fd, size, p_glyph)) {
+
+	int mod = 0;
+	if (fd->antialiasing == FONT_ANTIALIASING_LCD) {
+		TextServer::FontLCDSubpixelLayout layout = (TextServer::FontLCDSubpixelLayout)(int)GLOBAL_GET("gui/theme/lcd_subpixel_layout");
+		if (layout != FONT_LCD_SUBPIXEL_LAYOUT_NONE) {
+			mod = (layout << 24);
+		}
+	}
+
+	if (!_ensure_glyph(fd, size, p_glyph | mod)) {
 		return Vector2(); // Invalid or non graphicl glyph, do not display errors.
 	}
 
@@ -1632,7 +1728,16 @@ Vector2 TextServerFallback::font_get_glyph_offset(const RID &p_font_rid, const V
 	Vector2i size = _get_size_outline(fd, p_size);
 
 	ERR_FAIL_COND_V(!_ensure_cache_for_size(fd, size), Vector2());
-	if (!_ensure_glyph(fd, size, p_glyph)) {
+
+	int mod = 0;
+	if (fd->antialiasing == FONT_ANTIALIASING_LCD) {
+		TextServer::FontLCDSubpixelLayout layout = (TextServer::FontLCDSubpixelLayout)(int)GLOBAL_GET("gui/theme/lcd_subpixel_layout");
+		if (layout != FONT_LCD_SUBPIXEL_LAYOUT_NONE) {
+			mod = (layout << 24);
+		}
+	}
+
+	if (!_ensure_glyph(fd, size, p_glyph | mod)) {
 		return Vector2(); // Invalid or non graphicl glyph, do not display errors.
 	}
 
@@ -1668,7 +1773,16 @@ Vector2 TextServerFallback::font_get_glyph_size(const RID &p_font_rid, const Vec
 	Vector2i size = _get_size_outline(fd, p_size);
 
 	ERR_FAIL_COND_V(!_ensure_cache_for_size(fd, size), Vector2());
-	if (!_ensure_glyph(fd, size, p_glyph)) {
+
+	int mod = 0;
+	if (fd->antialiasing == FONT_ANTIALIASING_LCD) {
+		TextServer::FontLCDSubpixelLayout layout = (TextServer::FontLCDSubpixelLayout)(int)GLOBAL_GET("gui/theme/lcd_subpixel_layout");
+		if (layout != FONT_LCD_SUBPIXEL_LAYOUT_NONE) {
+			mod = (layout << 24);
+		}
+	}
+
+	if (!_ensure_glyph(fd, size, p_glyph | mod)) {
 		return Vector2(); // Invalid or non graphicl glyph, do not display errors.
 	}
 
@@ -1704,7 +1818,16 @@ Rect2 TextServerFallback::font_get_glyph_uv_rect(const RID &p_font_rid, const Ve
 	Vector2i size = _get_size_outline(fd, p_size);
 
 	ERR_FAIL_COND_V(!_ensure_cache_for_size(fd, size), Rect2());
-	if (!_ensure_glyph(fd, size, p_glyph)) {
+
+	int mod = 0;
+	if (fd->antialiasing == FONT_ANTIALIASING_LCD) {
+		TextServer::FontLCDSubpixelLayout layout = (TextServer::FontLCDSubpixelLayout)(int)GLOBAL_GET("gui/theme/lcd_subpixel_layout");
+		if (layout != FONT_LCD_SUBPIXEL_LAYOUT_NONE) {
+			mod = (layout << 24);
+		}
+	}
+
+	if (!_ensure_glyph(fd, size, p_glyph | mod)) {
 		return Rect2(); // Invalid or non graphicl glyph, do not display errors.
 	}
 
@@ -1735,7 +1858,16 @@ int64_t TextServerFallback::font_get_glyph_texture_idx(const RID &p_font_rid, co
 	Vector2i size = _get_size_outline(fd, p_size);
 
 	ERR_FAIL_COND_V(!_ensure_cache_for_size(fd, size), -1);
-	if (!_ensure_glyph(fd, size, p_glyph)) {
+
+	int mod = 0;
+	if (fd->antialiasing == FONT_ANTIALIASING_LCD) {
+		TextServer::FontLCDSubpixelLayout layout = (TextServer::FontLCDSubpixelLayout)(int)GLOBAL_GET("gui/theme/lcd_subpixel_layout");
+		if (layout != FONT_LCD_SUBPIXEL_LAYOUT_NONE) {
+			mod = (layout << 24);
+		}
+	}
+
+	if (!_ensure_glyph(fd, size, p_glyph | mod)) {
 		return -1; // Invalid or non graphicl glyph, do not display errors.
 	}
 
@@ -1766,7 +1898,16 @@ RID TextServerFallback::font_get_glyph_texture_rid(const RID &p_font_rid, const
 	Vector2i size = _get_size_outline(fd, p_size);
 
 	ERR_FAIL_COND_V(!_ensure_cache_for_size(fd, size), RID());
-	if (!_ensure_glyph(fd, size, p_glyph)) {
+
+	int mod = 0;
+	if (fd->antialiasing == FONT_ANTIALIASING_LCD) {
+		TextServer::FontLCDSubpixelLayout layout = (TextServer::FontLCDSubpixelLayout)(int)GLOBAL_GET("gui/theme/lcd_subpixel_layout");
+		if (layout != FONT_LCD_SUBPIXEL_LAYOUT_NONE) {
+			mod = (layout << 24);
+		}
+	}
+
+	if (!_ensure_glyph(fd, size, p_glyph | mod)) {
 		return RID(); // Invalid or non graphicl glyph, do not display errors.
 	}
 
@@ -1805,7 +1946,16 @@ Size2 TextServerFallback::font_get_glyph_texture_size(const RID &p_font_rid, con
 	Vector2i size = _get_size_outline(fd, p_size);
 
 	ERR_FAIL_COND_V(!_ensure_cache_for_size(fd, size), Size2());
-	if (!_ensure_glyph(fd, size, p_glyph)) {
+
+	int mod = 0;
+	if (fd->antialiasing == FONT_ANTIALIASING_LCD) {
+		TextServer::FontLCDSubpixelLayout layout = (TextServer::FontLCDSubpixelLayout)(int)GLOBAL_GET("gui/theme/lcd_subpixel_layout");
+		if (layout != FONT_LCD_SUBPIXEL_LAYOUT_NONE) {
+			mod = (layout << 24);
+		}
+	}
+
+	if (!_ensure_glyph(fd, size, p_glyph | mod)) {
 		return Size2(); // Invalid or non graphicl glyph, do not display errors.
 	}
 
@@ -2043,16 +2193,18 @@ void TextServerFallback::font_render_range(const RID &p_font_rid, const Vector2i
 			if (fd->msdf) {
 				_ensure_glyph(fd, size, (int32_t)idx);
 			} else {
-				if ((fd->subpixel_positioning == SUBPIXEL_POSITIONING_ONE_QUARTER) || (fd->subpixel_positioning == SUBPIXEL_POSITIONING_AUTO && size.x <= SUBPIXEL_POSITIONING_ONE_QUARTER_MAX_SIZE)) {
-					_ensure_glyph(fd, size, (int32_t)idx | (0 << 27));
-					_ensure_glyph(fd, size, (int32_t)idx | (1 << 27));
-					_ensure_glyph(fd, size, (int32_t)idx | (2 << 27));
-					_ensure_glyph(fd, size, (int32_t)idx | (3 << 27));
-				} else if ((fd->subpixel_positioning == SUBPIXEL_POSITIONING_ONE_HALF) || (fd->subpixel_positioning == SUBPIXEL_POSITIONING_AUTO && size.x <= SUBPIXEL_POSITIONING_ONE_HALF_MAX_SIZE)) {
-					_ensure_glyph(fd, size, (int32_t)idx | (1 << 27));
-					_ensure_glyph(fd, size, (int32_t)idx | (0 << 27));
-				} else {
-					_ensure_glyph(fd, size, (int32_t)idx);
+				for (int aa = 0; aa < ((fd->antialiasing == FONT_ANTIALIASING_LCD) ? FONT_LCD_SUBPIXEL_LAYOUT_MAX : 1); aa++) {
+					if ((fd->subpixel_positioning == SUBPIXEL_POSITIONING_ONE_QUARTER) || (fd->subpixel_positioning == SUBPIXEL_POSITIONING_AUTO && size.x <= SUBPIXEL_POSITIONING_ONE_QUARTER_MAX_SIZE)) {
+						_ensure_glyph(fd, size, (int32_t)idx | (0 << 27) | (aa << 24));
+						_ensure_glyph(fd, size, (int32_t)idx | (1 << 27) | (aa << 24));
+						_ensure_glyph(fd, size, (int32_t)idx | (2 << 27) | (aa << 24));
+						_ensure_glyph(fd, size, (int32_t)idx | (3 << 27) | (aa << 24));
+					} else if ((fd->subpixel_positioning == SUBPIXEL_POSITIONING_ONE_HALF) || (fd->subpixel_positioning == SUBPIXEL_POSITIONING_AUTO && size.x <= SUBPIXEL_POSITIONING_ONE_HALF_MAX_SIZE)) {
+						_ensure_glyph(fd, size, (int32_t)idx | (1 << 27) | (aa << 24));
+						_ensure_glyph(fd, size, (int32_t)idx | (0 << 27) | (aa << 24));
+					} else {
+						_ensure_glyph(fd, size, (int32_t)idx | (aa << 24));
+					}
 				}
 			}
 		}
@@ -2073,16 +2225,18 @@ void TextServerFallback::font_render_glyph(const RID &p_font_rid, const Vector2i
 		if (fd->msdf) {
 			_ensure_glyph(fd, size, (int32_t)idx);
 		} else {
-			if ((fd->subpixel_positioning == SUBPIXEL_POSITIONING_ONE_QUARTER) || (fd->subpixel_positioning == SUBPIXEL_POSITIONING_AUTO && size.x <= SUBPIXEL_POSITIONING_ONE_QUARTER_MAX_SIZE)) {
-				_ensure_glyph(fd, size, (int32_t)idx | (0 << 27));
-				_ensure_glyph(fd, size, (int32_t)idx | (1 << 27));
-				_ensure_glyph(fd, size, (int32_t)idx | (2 << 27));
-				_ensure_glyph(fd, size, (int32_t)idx | (3 << 27));
-			} else if ((fd->subpixel_positioning == SUBPIXEL_POSITIONING_ONE_HALF) || (fd->subpixel_positioning == SUBPIXEL_POSITIONING_AUTO && size.x <= SUBPIXEL_POSITIONING_ONE_HALF_MAX_SIZE)) {
-				_ensure_glyph(fd, size, (int32_t)idx | (1 << 27));
-				_ensure_glyph(fd, size, (int32_t)idx | (0 << 27));
-			} else {
-				_ensure_glyph(fd, size, (int32_t)idx);
+			for (int aa = 0; aa < ((fd->antialiasing == FONT_ANTIALIASING_LCD) ? FONT_LCD_SUBPIXEL_LAYOUT_MAX : 1); aa++) {
+				if ((fd->subpixel_positioning == SUBPIXEL_POSITIONING_ONE_QUARTER) || (fd->subpixel_positioning == SUBPIXEL_POSITIONING_AUTO && size.x <= SUBPIXEL_POSITIONING_ONE_QUARTER_MAX_SIZE)) {
+					_ensure_glyph(fd, size, (int32_t)idx | (0 << 27) | (aa << 24));
+					_ensure_glyph(fd, size, (int32_t)idx | (1 << 27) | (aa << 24));
+					_ensure_glyph(fd, size, (int32_t)idx | (2 << 27) | (aa << 24));
+					_ensure_glyph(fd, size, (int32_t)idx | (3 << 27) | (aa << 24));
+				} else if ((fd->subpixel_positioning == SUBPIXEL_POSITIONING_ONE_HALF) || (fd->subpixel_positioning == SUBPIXEL_POSITIONING_AUTO && size.x <= SUBPIXEL_POSITIONING_ONE_HALF_MAX_SIZE)) {
+					_ensure_glyph(fd, size, (int32_t)idx | (1 << 27) | (aa << 24));
+					_ensure_glyph(fd, size, (int32_t)idx | (0 << 27) | (aa << 24));
+				} else {
+					_ensure_glyph(fd, size, (int32_t)idx | (aa << 24));
+				}
 			}
 		}
 	}
@@ -2098,9 +2252,19 @@ void TextServerFallback::font_draw_glyph(const RID &p_font_rid, const RID &p_can
 	ERR_FAIL_COND(!_ensure_cache_for_size(fd, size));
 
 	int32_t index = p_index & 0xffffff; // Remove subpixel shifts.
+	bool lcd_aa = false;
 
 #ifdef MODULE_FREETYPE_ENABLED
 	if (!fd->msdf && fd->cache[size]->face) {
+		// LCD layout, bits 24, 25, 26
+		if (fd->antialiasing == FONT_ANTIALIASING_LCD) {
+			TextServer::FontLCDSubpixelLayout layout = (TextServer::FontLCDSubpixelLayout)(int)GLOBAL_GET("gui/theme/lcd_subpixel_layout");
+			if (layout != FONT_LCD_SUBPIXEL_LAYOUT_NONE) {
+				lcd_aa = true;
+				index = index | (layout << 24);
+			}
+		}
+		// Subpixel X-shift, bits 27, 28
 		if ((fd->subpixel_positioning == SUBPIXEL_POSITIONING_ONE_QUARTER) || (fd->subpixel_positioning == SUBPIXEL_POSITIONING_AUTO && size.x <= SUBPIXEL_POSITIONING_ONE_QUARTER_MAX_SIZE)) {
 			int xshift = (int)(Math::floor(4 * (p_pos.x + 0.125)) - 4 * Math::floor(p_pos.x + 0.125));
 			index = index | (xshift << 27);
@@ -2122,7 +2286,7 @@ void TextServerFallback::font_draw_glyph(const RID &p_font_rid, const RID &p_can
 		if (gl.texture_idx != -1) {
 			Color modulate = p_color;
 #ifdef MODULE_FREETYPE_ENABLED
-			if (fd->cache[size]->face && fd->cache[size]->textures[gl.texture_idx].format == Image::FORMAT_RGBA8) {
+			if (fd->cache[size]->face && (fd->cache[size]->textures[gl.texture_idx].format == Image::FORMAT_RGBA8) && !lcd_aa) {
 				modulate.r = modulate.g = modulate.b = 1.0;
 			}
 #endif
@@ -2160,7 +2324,11 @@ void TextServerFallback::font_draw_glyph(const RID &p_font_rid, const RID &p_can
 					}
 					cpos += gl.rect.position;
 					Size2 csize = gl.rect.size;
-					RenderingServer::get_singleton()->canvas_item_add_texture_rect_region(p_canvas, Rect2(cpos, csize), texture, gl.uv_rect, modulate, false, false);
+					if (lcd_aa) {
+						RenderingServer::get_singleton()->canvas_item_add_lcd_texture_rect_region(p_canvas, Rect2(cpos, csize), texture, gl.uv_rect, modulate);
+					} else {
+						RenderingServer::get_singleton()->canvas_item_add_texture_rect_region(p_canvas, Rect2(cpos, csize), texture, gl.uv_rect, modulate, false, false);
+					}
 				}
 			}
 		}
@@ -2176,9 +2344,19 @@ void TextServerFallback::font_draw_glyph_outline(const RID &p_font_rid, const RI
 	ERR_FAIL_COND(!_ensure_cache_for_size(fd, size));
 
 	int32_t index = p_index & 0xffffff; // Remove subpixel shifts.
+	bool lcd_aa = false;
 
 #ifdef MODULE_FREETYPE_ENABLED
 	if (!fd->msdf && fd->cache[size]->face) {
+		// LCD layout, bits 24, 25, 26
+		if (fd->antialiasing == FONT_ANTIALIASING_LCD) {
+			TextServer::FontLCDSubpixelLayout layout = (TextServer::FontLCDSubpixelLayout)(int)GLOBAL_GET("gui/theme/lcd_subpixel_layout");
+			if (layout != FONT_LCD_SUBPIXEL_LAYOUT_NONE) {
+				lcd_aa = true;
+				index = index | (layout << 24);
+			}
+		}
+		// Subpixel X-shift, bits 27, 28
 		if ((fd->subpixel_positioning == SUBPIXEL_POSITIONING_ONE_QUARTER) || (fd->subpixel_positioning == SUBPIXEL_POSITIONING_AUTO && size.x <= SUBPIXEL_POSITIONING_ONE_QUARTER_MAX_SIZE)) {
 			int xshift = (int)(Math::floor(4 * (p_pos.x + 0.125)) - 4 * Math::floor(p_pos.x + 0.125));
 			index = index | (xshift << 27);
@@ -2238,7 +2416,11 @@ void TextServerFallback::font_draw_glyph_outline(const RID &p_font_rid, const RI
 					}
 					cpos += gl.rect.position;
 					Size2 csize = gl.rect.size;
-					RenderingServer::get_singleton()->canvas_item_add_texture_rect_region(p_canvas, Rect2(cpos, csize), texture, gl.uv_rect, modulate, false, false);
+					if (lcd_aa) {
+						RenderingServer::get_singleton()->canvas_item_add_lcd_texture_rect_region(p_canvas, Rect2(cpos, csize), texture, gl.uv_rect, modulate);
+					} else {
+						RenderingServer::get_singleton()->canvas_item_add_texture_rect_region(p_canvas, Rect2(cpos, csize), texture, gl.uv_rect, modulate, false, false);
+					}
 				}
 			}
 		}
diff --git a/modules/text_server_fb/text_server_fb.h b/modules/text_server_fb/text_server_fb.h
index fef19d442b..e1609ef500 100644
--- a/modules/text_server_fb/text_server_fb.h
+++ b/modules/text_server_fb/text_server_fb.h
@@ -179,7 +179,7 @@ class TextServerFallback : public TextServerExtension {
 	struct FontFallback {
 		Mutex mutex;
 
-		bool antialiased = true;
+		TextServer::FontAntialiasing antialiasing = TextServer::FONT_ANTIALIASING_GRAY;
 		bool mipmaps = false;
 		bool msdf = false;
 		int msdf_range = 14;
@@ -225,7 +225,7 @@ class TextServerFallback : public TextServerExtension {
 	_FORCE_INLINE_ FontGlyph rasterize_msdf(FontFallback *p_font_data, FontForSizeFallback *p_data, int p_pixel_range, int p_rect_margin, FT_Outline *outline, const Vector2 &advance) const;
 #endif
 #ifdef MODULE_FREETYPE_ENABLED
-	_FORCE_INLINE_ FontGlyph rasterize_bitmap(FontForSizeFallback *p_data, int p_rect_margin, FT_Bitmap bitmap, int yofs, int xofs, const Vector2 &advance) const;
+	_FORCE_INLINE_ FontGlyph rasterize_bitmap(FontForSizeFallback *p_data, int p_rect_margin, FT_Bitmap bitmap, int yofs, int xofs, const Vector2 &advance, bool p_bgra) const;
 #endif
 	_FORCE_INLINE_ bool _ensure_glyph(FontFallback *p_font_data, const Vector2i &p_size, int32_t p_glyph) const;
 	_FORCE_INLINE_ bool _ensure_cache_for_size(FontFallback *p_font_data, const Vector2i &p_size) const;
@@ -378,8 +378,8 @@ public:
 	virtual void font_set_name(const RID &p_font_rid, const String &p_name) override;
 	virtual String font_get_name(const RID &p_font_rid) const override;
 
-	virtual void font_set_antialiased(const RID &p_font_rid, bool p_antialiased) override;
-	virtual bool font_is_antialiased(const RID &p_font_rid) const override;
+	virtual void font_set_antialiasing(RID p_font_rid, TextServer::FontAntialiasing p_antialiasing) override;
+	virtual TextServer::FontAntialiasing font_get_antialiasing(RID p_font_rid) const override;
 
 	virtual void font_set_generate_mipmaps(const RID &p_font_rid, bool p_generate_mipmaps) override;
 	virtual bool font_get_generate_mipmaps(const RID &p_font_rid) const override;