initial commit, 4.5 stable

drivers/png/SCsub

@@ -0,0 +1,75 @@
+#!/usr/bin/env python
+from misc.utility.scons_hints import *
+
+Import("env")
+
+env_png = env.Clone()
+
+# Thirdparty source files
+
+thirdparty_obj = []
+
+if env["builtin_libpng"]:
+    thirdparty_dir = "#thirdparty/libpng/"
+    thirdparty_sources = [
+        "png.c",
+        "pngerror.c",
+        "pngget.c",
+        "pngmem.c",
+        "pngpread.c",
+        "pngread.c",
+        "pngrio.c",
+        "pngrtran.c",
+        "pngrutil.c",
+        "pngset.c",
+        "pngtrans.c",
+        "pngwio.c",
+        "pngwrite.c",
+        "pngwtran.c",
+        "pngwutil.c",
+    ]
+    thirdparty_sources = [thirdparty_dir + file for file in thirdparty_sources]
+
+    env_png.Prepend(CPPEXTPATH=[thirdparty_dir])
+    # Needed for drivers includes and in platform/web.
+    env.Prepend(CPPEXTPATH=[thirdparty_dir])
+
+    env_thirdparty = env_png.Clone()
+    env_thirdparty.disable_warnings()
+    env_thirdparty.add_source_files(thirdparty_obj, thirdparty_sources)
+
+    if env["arch"].startswith("arm"):
+        if env.msvc:  # Can't compile assembly files with MSVC.
+            env_thirdparty.Append(CPPDEFINES=[("PNG_ARM_NEON_OPT", 0)])
+        else:
+            env_neon = env_thirdparty.Clone()
+            if "S_compiler" in env:
+                env_neon["CC"] = env["S_compiler"]
+            neon_sources = []
+            neon_sources.append(env_neon.Object(thirdparty_dir + "arm/arm_init.c"))
+            neon_sources.append(env_neon.Object(thirdparty_dir + "arm/filter_neon_intrinsics.c"))
+            neon_sources.append(env_neon.Object(thirdparty_dir + "arm/palette_neon_intrinsics.c"))
+            thirdparty_obj += neon_sources
+    elif env["arch"].startswith("x86"):
+        env_thirdparty.Append(CPPDEFINES=["PNG_INTEL_SSE"])
+        env_thirdparty.add_source_files(thirdparty_obj, thirdparty_dir + "intel/intel_init.c")
+        env_thirdparty.add_source_files(thirdparty_obj, thirdparty_dir + "intel/filter_sse2_intrinsics.c")
+    elif env["arch"] == "loongarch64":
+        env_thirdparty.add_source_files(thirdparty_obj, thirdparty_dir + "loongarch/loongarch_lsx_init.c")
+        env_thirdparty.add_source_files(thirdparty_obj, thirdparty_dir + "loongarch/filter_lsx_intrinsics.c")
+    elif env["arch"] == "ppc64":
+        env_thirdparty.add_source_files(thirdparty_obj, thirdparty_dir + "powerpc/powerpc_init.c")
+        env_thirdparty.add_source_files(thirdparty_obj, thirdparty_dir + "powerpc/filter_vsx_intrinsics.c")
+
+    env.drivers_sources += thirdparty_obj
+
+
+# Godot source files
+
+driver_obj = []
+
+env_png.add_source_files(driver_obj, "*.cpp")
+env.drivers_sources += driver_obj
+
+# Needed to force rebuilding the driver files when the thirdparty library is updated.
+env.Depends(driver_obj, thirdparty_obj)