Makes FontData importable resource.

Adds multi-channel SDF font texture generation and rendering support.
Adds per-font oversampling support.
Adds FontData import plugins (for dynamic fonts, BMFonts and monospaced image fonts), font texture cache pre-generation and loading.
Adds BMFont binary format and outline support.

4 files changed, 144 insertions, 0 deletions

diff --git a/modules/msdfgen/SCsub b/modules/msdfgen/SCsub
new file mode 100644
index 0000000000..227369f4bd
--- /dev/null
+++ b/modules/msdfgen/SCsub
@@ -0,0 +1,66 @@
+#!/usr/bin/env python
+
+Import("env")
+Import("env_modules")
+
+env_msdfgen = env_modules.Clone()
+
+# Thirdparty source files
+
+thirdparty_obj = []
+
+if env["builtin_msdfgen"]:
+    env_msdfgen.disable_warnings()
+
+    thirdparty_dir = "#thirdparty/msdfgen/"
+    thirdparty_sources = [
+        "core/Contour.cpp",
+        "core/EdgeHolder.cpp",
+        "core/MSDFErrorCorrection.cpp",
+        "core/Projection.cpp",
+        "core/Scanline.cpp",
+        "core/Shape.cpp",
+        "core/SignedDistance.cpp",
+        "core/Vector2.cpp",
+        "core/contour-combiners.cpp",
+        "core/edge-coloring.cpp",
+        "core/edge-segments.cpp",
+        "core/edge-selectors.cpp",
+        "core/equation-solver.cpp",
+        "core/msdf-error-correction.cpp",
+        "core/msdfgen.cpp",
+        "core/rasterization.cpp",
+        "core/render-sdf.cpp",
+        "core/sdf-error-estimation.cpp",
+        "core/shape-description.cpp",
+    ]
+    thirdparty_sources = [thirdparty_dir + file for file in thirdparty_sources]
+
+    env_msdfgen.Append(CPPPATH=["#thirdparty/freetype/include", "#thirdparty/msdfgen", "#thirdparty/nanosvg"])
+
+    lib = env_msdfgen.add_library("msdfgen_builtin", thirdparty_sources)
+    thirdparty_obj += lib
+
+    # Needs to be appended to arrive after libscene in the linker call,
+    # but we don't want it to arrive *after* system libs, so manual hack
+    # LIBS contains first SCons Library objects ("SCons.Node.FS.File object")
+    # and then plain strings for system library. We insert between the two.
+    inserted = False
+    for idx, linklib in enumerate(env["LIBS"]):
+        if isinstance(linklib, (str, bytes)):  # first system lib such as "X11", otherwise SCons lib object
+            env["LIBS"].insert(idx, lib)
+            inserted = True
+            break
+    if not inserted:
+        env.Append(LIBS=[lib])
+
+
+# Godot source files
+
+module_obj = []
+
+env_msdfgen.add_source_files(module_obj, "*.cpp")
+env.modules_sources += module_obj
+
+# Needed to force rebuilding the module files when the thirdparty library is updated.
+env.Depends(module_obj, thirdparty_obj)
diff --git a/modules/msdfgen/config.py b/modules/msdfgen/config.py
new file mode 100644
index 0000000000..653e466a74
--- /dev/null
+++ b/modules/msdfgen/config.py
@@ -0,0 +1,6 @@
+def can_build(env, platform):
+    return env.module_check_dependencies("msdfgen", ["freetype"])
+
+
+def configure(env):
+    pass
diff --git a/modules/msdfgen/register_types.cpp b/modules/msdfgen/register_types.cpp
new file mode 100644
index 0000000000..ad60a66d2d
--- /dev/null
+++ b/modules/msdfgen/register_types.cpp
@@ -0,0 +1,35 @@
+/*************************************************************************/
+/*  register_types.cpp                                                   */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md).   */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+
+#include "register_types.h"
+
+void register_msdfgen_types() {}
+
+void unregister_msdfgen_types() {}
diff --git a/modules/msdfgen/register_types.h b/modules/msdfgen/register_types.h
new file mode 100644
index 0000000000..fb776c14ed
--- /dev/null
+++ b/modules/msdfgen/register_types.h
@@ -0,0 +1,37 @@
+/*************************************************************************/
+/*  register_types.h                                                     */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md).   */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+
+#ifndef MSDFGEN_REGISTER_TYPES_H
+#define MSDFGEN_REGISTER_TYPES_H
+
+void register_msdfgen_types();
+void unregister_msdfgen_types();
+
+#endif // MSDFGEN_REGISTER_TYPES_H