Add double precision build support.

Author: bruvzg

.github/workflows/ci.yml

@@ -15,6 +15,13 @@ jobs:
             artifact-name: godot-cpp-linux-glibc2.27-x86_64-release
             artifact-path: bin/libgodot-cpp.linux.release.64.a
 
+          - name: 🐧 Linux (GCC, Double Precision)
+            os: ubuntu-18.04
+            platform: linux
+            artifact-name: godot-cpp-linux-glibc2.27-x86_64-double-release
+            artifact-path: bin/libgodot-cpp.linux.release.64.a
+            flags: float=64
+
           - name: 🏁 Windows (x86_64, MSVC)
             os: windows-2019
             platform: windows

SConstruct

@@ -144,6 +144,7 @@ opts.Add(
 opts.Add(BoolVariable("generate_template_get_node", "Generate a template version of the Node class's get_node.", True))
 
 opts.Add(BoolVariable("build_library", "Build the godot-cpp library.", True))
+opts.Add(EnumVariable("float", "Floating-point precision", "32", ("32", "64")))
 
 opts.Update(env)
 Help(opts.GenerateHelpText(env))
@@ -176,6 +177,9 @@ else:
 if env["target"] == "debug":
     env.Append(CPPDEFINES=["DEBUG_ENABLED", "DEBUG_METHODS_ENABLED"])
 
+if env["float"] == "64":
+    env.Append(CPPDEFINES=["REAL_T_IS_DOUBLE"])
+
 if env["platform"] == "linux" or env["platform"] == "freebsd":
     if env["use_llvm"]:
         env["CXX"] = "clang++"
@@ -469,7 +473,7 @@ if should_generate_bindings:
     # Actually create the bindings here
     import binding_generator
 
-    binding_generator.generate_bindings(json_api_file, env["generate_template_get_node"])
+    binding_generator.generate_bindings(json_api_file, env["generate_template_get_node"], env["bits"], "double" if (env["float"] == "64") else "float")
 
 # Sources to compile
 sources = []

binding_generator.py

@@ -50,7 +50,7 @@ def print_file_list(api_filepath, output_dir, headers=False, sources=False):
         print(str(utility_functions_source_path.as_posix()), end=end)
 
 
-def generate_bindings(api_filepath, use_template_get_node, output_dir="."):
+def generate_bindings(api_filepath, use_template_get_node, bits="64", double="float", output_dir="."):
     api = None
 
     target_dir = Path(output_dir) / "gen"
@@ -63,7 +63,7 @@ def generate_bindings(api_filepath, use_template_get_node, output_dir="."):
 
     generate_global_constants(api, target_dir)
     generate_global_constant_binds(api, target_dir)
-    generate_builtin_bindings(api, target_dir, "float_64")
+    generate_builtin_bindings(api, target_dir, double + "_" + bits)
     generate_engine_classes_bindings(api, target_dir, use_template_get_node)
     generate_utility_functions(api, target_dir)
 

include/godot_cpp/variant/color.hpp

@@ -159,7 +159,7 @@ class Color {
 
 	inline Color blend(const Color &p_over) const {
 		Color res;
-		float sa = (real_t)1.0 - p_over.a;
+		float sa = 1.0 - p_over.a;
 		res.a = a * sa + p_over.a;
 		if (res.a == 0) {
 			return Color(0, 0, 0, 0);
@@ -173,16 +173,16 @@ class Color {
 
 	inline Color to_linear() const {
 		return Color(
-				r < (real_t)0.04045 ? r * (real_t)(1.0 / 12.92) : Math::pow((r + (real_t)0.055) * (real_t)(1.0 / (1.0 + 0.055)), (real_t)2.4),
-				g < (real_t)0.04045 ? g * (real_t)(1.0 / 12.92) : Math::pow((g + (real_t)0.055) * (real_t)(1.0 / (1.0 + 0.055)), (real_t)2.4),
-				b < (real_t)0.04045 ? b * (real_t)(1.0 / 12.92) : Math::pow((b + (real_t)0.055) * (real_t)(1.0 / (1.0 + 0.055)), (real_t)2.4),
+				r < 0.04045 ? r * (1.0 / 12.92) : Math::pow((r + 0.055f) * (1.0 / (1.0 + 0.055)), 2.4),
+				g < 0.04045 ? g * (1.0 / 12.92) : Math::pow((g + 0.055f) * (1.0 / (1.0 + 0.055)), 2.4),
+				b < 0.04045 ? b * (1.0 / 12.92) : Math::pow((b + 0.055f) * (1.0 / (1.0 + 0.055)), 2.4),
 				a);
 	}
 	inline Color to_srgb() const {
 		return Color(
-				r < (real_t)0.0031308 ? (real_t)12.92 * r : (real_t)(1.0 + 0.055) * Math::pow(r, (real_t)(1.0 / 2.4)) - (real_t)0.055,
-				g < (real_t)0.0031308 ? (real_t)12.92 * g : (real_t)(1.0 + 0.055) * Math::pow(g, (real_t)(1.0 / 2.4)) - (real_t)0.055,
-				b < (real_t)0.0031308 ? (real_t)12.92 * b : (real_t)(1.0 + 0.055) * Math::pow(b, (real_t)(1.0 / 2.4)) - (real_t)0.055, a);
+				r < 0.0031308f ? 12.92f * r : (1.0f + 0.055f) * Math::pow(r, 1.0f / 2.4f) - 0.055f,
+				g < 0.0031308f ? 12.92f * g : (1.0f + 0.055f) * Math::pow(g, 1.0f / 2.4f) - 0.055f,
+				b < 0.0031308f ? 12.92f * b : (1.0f + 0.055f) * Math::pow(b, 1.0f / 2.4f) - 0.055f, a);
 	}
 
 	static Color hex(uint32_t p_hex);
@@ -204,14 +204,14 @@ class Color {
 	operator String() const;
 
 	// For the binder.
-	inline void set_r8(int32_t r8) { r = (Math::clamp(r8, 0, 255) / (real_t)255.0); }
-	inline int32_t get_r8() const { return int32_t(Math::clamp(r * (real_t)255.0, (real_t)0.0, (real_t)255.0)); }
-	inline void set_g8(int32_t g8) { g = (Math::clamp(g8, 0, 255) / (real_t)255.0); }
-	inline int32_t get_g8() const { return int32_t(Math::clamp(g * (real_t)255.0, (real_t)0.0, (real_t)255.0)); }
-	inline void set_b8(int32_t b8) { b = (Math::clamp(b8, 0, 255) / (real_t)255.0); }
-	inline int32_t get_b8() const { return int32_t(Math::clamp(b * (real_t)255.0, (real_t)0.0, (real_t)255.0)); }
-	inline void set_a8(int32_t a8) { a = (Math::clamp(a8, 0, 255) / (real_t)255.0); }
-	inline int32_t get_a8() const { return int32_t(Math::clamp(a * (real_t)255.0, (real_t)0.0, (real_t)255.0)); }
+	inline void set_r8(int32_t r8) { r = (Math::clamp(r8, 0, 255) / 255.0); }
+	inline int32_t get_r8() const { return int32_t(Math::clamp(r * 255.0, 0.0, 255.0)); }
+	inline void set_g8(int32_t g8) { g = (Math::clamp(g8, 0, 255) / 255.0); }
+	inline int32_t get_g8() const { return int32_t(Math::clamp(g * 255.0, 0.0, 255.0)); }
+	inline void set_b8(int32_t b8) { b = (Math::clamp(b8, 0, 255) / 255.0); }
+	inline int32_t get_b8() const { return int32_t(Math::clamp(b * 255.0, 0.0, 255.0)); }
+	inline void set_a8(int32_t a8) { a = (Math::clamp(a8, 0, 255) / 255.0); }
+	inline int32_t get_a8() const { return int32_t(Math::clamp(a * 255.0, 0.0, 255.0)); }
 
 	inline void set_h(float p_h) { set_hsv(p_h, get_s(), get_v()); }
 	inline void set_s(float p_s) { set_hsv(get_h(), p_s, get_v()); }