opengl: replace mipmap linked list with unordered map

this seems to cut the time spent searching the list for color mipmaps in half
2026-01-20 15:43:36 +01:00
56 changed files with 693 additions and 867 deletions
@@ -1,46 +1,14 @@
 cmake_minimum_required(VERSION 3.5)
-
-if(${PROJECT_SOURCE_DIR} MATCHES ${PROJECT_BINARY_DIR})
-	message(FATAL_ERROR "In-source builds will bring you a world of pain. Please make a separate directory to invoke CMake from.")
-endif()
-
 # DO NOT CHANGE THIS SRB2 STRING! Some variable names depend on this string.
 # Version change is fine.
 project(SRB2
 	VERSION 1.6
-	LANGUAGES C CXX)
+	LANGUAGES C)

-set(CMAKE_CXX_STANDARD 17)
-set(CMAKE_CXX_STANDARD_REQUIRED ON)
-#set(CMAKE_CXX_EXTENSIONS OFF)    # optional but recommended: disables GNU extensions, forces pure ISO C++
-set(CMAKE_CXX_EXTENSIONS ON)
-set(CMAKE_C_EXTENSIONS ON)
-
-##### PACKAGE CONFIGURATION #####
-
-set(SRB2_CPACK_GENERATOR "" CACHE STRING "Generator to use for making a package. E.g., ZIP, TGZ, DragNDrop (OSX only). Leave blank for default generator.")
-
-if("${SRB2_CPACK_GENERATOR}" STREQUAL "")
-	if("${CMAKE_SYSTEM_NAME}" MATCHES "Windows")
-		set(SRB2_CPACK_GENERATOR "ZIP")
-	elseif("${CMAKE_SYSTEM_NAME}" MATCHES "Linux")
-		set(SRB2_CPACK_GENERATOR "TGZ")
-	elseif("${CMAKE_SYSTEM_NAME}" MATCHES "Darwin")
-		set(SRB2_CPACK_GENERATOR "TGZ")
-	endif()
+if(${PROJECT_SOURCE_DIR} MATCHES ${PROJECT_BINARY_DIR})
+	message(FATAL_ERROR "In-source builds will bring you a world of pain. Please make a separate directory to invoke CMake from.")
 endif()

-set(CPACK_GENERATOR ${SRB2_CPACK_GENERATOR})
-set(CPACK_PACKAGE_DESCRIPTION_SUMMARY "Sonic Robo Blast 2 Kart" CACHE STRING "Program name for display purposes")
-set(CPACK_PACKAGE_VENDOR "Kart Krew" CACHE STRING "Vendor name for display purposes")
-#set(CPACK_PACKAGE_DESCRIPTION_FILE )
-set(CPACK_RESOURCE_FILE_LICENSE "${CMAKE_CURRENT_SOURCE_DIR}/LICENSE")
-set(CPACK_PACKAGE_VERSION_MAJOR ${SRB2_VERSION_MAJOR})
-set(CPACK_PACKAGE_VERSION_MINOR ${SRB2_VERSION_MINOR})
-set(CPACK_PACKAGE_VERSION_PATCH ${SRB2_VERSION_PATCH})
-set(CPACK_PACKAGE_INSTALL_DIRECTORY "CMake ${CMAKE_VERSION_MAJOR}.${CMAKE_VERSION_MINOR}")
-include(CPack)
-
 # Set up CMAKE path
 set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_SOURCE_DIR}/cmake/Modules/")

@@ -105,7 +73,6 @@ endif()
 # OS macros
 if (UNIX)
 	add_definitions(-DUNIXCOMMON)
-	add_link_options(-rdynamic) # Use -rdynamic so a backtrace log shows function names
 endif()

 if(CMAKE_COMPILER_IS_GNUCC)
@@ -128,12 +95,14 @@ set(CMAKE_PDB_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/bin")

 # Set EXE names so the assets CMakeLists can refer to its target
 set(SRB2_SDL2_EXE_NAME srb2kart CACHE STRING "Executable binary output name")
+set(SRB2_WIN_EXE_NAME srb2kartdd CACHE STRING "Executable binary output name for DirectDraw build")

 include_directories(${CMAKE_CURRENT_BINARY_DIR}/src)

 add_subdirectory(src)
 add_subdirectory(assets)

+
 ## config.h generation
 set(GIT_EXECUTABLE "git" CACHE FILEPATH "Path to git binary")
 include(GitUtilities)
@@ -142,3 +111,25 @@ git_current_branch(SRB2_GIT_BRANCH "${CMAKE_SOURCE_DIR}")
 set(SRB2_COMP_BRANCH "${SRB2_GIT_BRANCH}")
 set(SRB2_COMP_REVISION "${SRB2_COMP_COMMIT}")
 configure_file(${CMAKE_CURRENT_SOURCE_DIR}/src/config.h.in ${CMAKE_CURRENT_BINARY_DIR}/src/config.h)
+
+##### PACKAGE CONFIGURATION #####
+
+if(${CMAKE_SYSTEM} MATCHES "Windows")
+	set(CPACK_GENERATOR "ZIP")
+endif()
+if(${CMAKE_SYSTEM} MATCHES "Linux")
+	set(CPACK_GENERATOR "TGZ")
+endif()
+if(${CMAKE_SYSTEM} MATCHES "Darwin")
+	set(CPACK_GENERATOR "DragNDrop")
+endif()
+
+set(CPACK_PACKAGE_DESCRIPTION_SUMMARY "Sonic Robo Blast 2 Kart" CACHE STRING "Program name for display purposes")
+set(CPACK_PACKAGE_VENDOR "Kart Krew" CACHE STRING "Vendor name for display purposes")
+#set(CPACK_PACKAGE_DESCRIPTION_FILE )
+set(CPACK_RESOURCE_FILE_LICENSE "${CMAKE_CURRENT_SOURCE_DIR}/LICENSE")
+set(CPACK_PACKAGE_VERSION_MAJOR ${SRB2_VERSION_MAJOR})
+set(CPACK_PACKAGE_VERSION_MINOR ${SRB2_VERSION_MINOR})
+set(CPACK_PACKAGE_VERSION_PATCH ${SRB2_VERSION_PATCH})
+set(CPACK_PACKAGE_INSTALL_DIRECTORY "CMake ${CMAKE_VERSION_MAJOR}.${CMAKE_VERSION_MINOR}")
+include(CPack)
@@ -22,14 +22,14 @@ We also have a Flatpak available on [Flathub](https://flathub.org/en/apps/org.sr

 See [SRB2 Wiki/Source code compiling](http://wiki.srb2.org/wiki/Source_code_compiling). The compiling process for SRB2Kart is largely identical to SRB2.

-For Windows only the Makefile build system with GCC or Clang compiler is supported.
+Currently only the Makefile build system with GCC or Clang compiler is supported.
+CMake is NOT supported at the moment, but will be availible again soon.
+
 Visual C++ (MSVC) is unsupported.

 64-bit Windows builds are supported and recommended over 32-bit builds, they will build automatically when using the MSYS2 MinGW 64-bit executable (requires the mingw-w64-x86_64-gcc package), no extra flags needed!
 The specific DLLs can be found under /libs/dll-binaries/(i686 for 32bit/x86_64 for 64-bit)/ or in the Release packages

-MacOS and Linux can be build with CMake, but it is recommended to use the Makefile for Linux over CMake
-
 Alternatively the [srb2bld](https://github.com/Bijman/srb2bld) script by Bijman can be used aswell!

 ## Disclaimer
@@ -1,10 +1,5 @@
 ## Assets Target Configuration ##

-if(${CMAKE_SYSTEM} MATCHES Linux)
-	# Asset installation isn't part of the Linux target
-	return()
-endif()
-
 # For prepending the current source path, later
 FUNCTION(PREPEND var prefix)
   SET(listVar "")
@@ -1,6 +1,6 @@
 include(LibFindMacros)

-libfind_pkg_check_modules(GME_PKGCONF LIBGME)
+libfind_pkg_check_modules(GME_PKGCONF GME)

 find_path(GME_INCLUDE_DIR
 	NAMES gme.h
@@ -8,7 +8,6 @@ find_path(GME_INCLUDE_DIR
 		${GME_PKGCONF_INCLUDE_DIRS}
 		"/usr/include/gme"
 		"/usr/local/include/gme"
-	PATH_SUFFIXES gme
 )

 find_library(GME_LIBRARY
@@ -21,4 +20,4 @@ find_library(GME_LIBRARY

 set(GME_PROCESS_INCLUDES GME_INCLUDE_DIR)
 set(GME_PROCESS_LIBS GME_LIBRARY)
-libfind_process(GME)
+libfind_process(GME)
@@ -1,6 +1,6 @@
 include(LibFindMacros)

-libfind_pkg_check_modules(OPENMPT_PKGCONF LIBOPENMPT)
+libfind_pkg_check_modules(OPENMPT_PKGCONF OPENMPT)

 find_path(OPENMPT_INCLUDE_DIR
 	NAMES libopenmpt.h
@@ -8,7 +8,6 @@ find_path(OPENMPT_INCLUDE_DIR
 		${OPENMPT_PKGCONF_INCLUDE_DIRS}
 		"/usr/include/libopenmpt"
 		"/usr/local/include/libopenmpt"
-	PATH_SUFFIXES libopenmpt
 )

 find_library(OPENMPT_LIBRARY
@@ -21,4 +20,4 @@ find_library(OPENMPT_LIBRARY

 set(OPENMPT_PROCESS_INCLUDES OPENMPT_INCLUDE_DIR)
 set(OPENMPT_PROCESS_LIBS OPENMPT_LIBRARY)
-libfind_process(OPENMPT)
+libfind_process(OPENMPT)
@@ -1,33 +0,0 @@
-include(LibFindMacros)
-
-libfind_pkg_check_modules(LIBBACKTRACE_PKGCONF LIBBACKTRACE)
-
-find_path(LIBBACKTRACE_INCLUDE_DIR
-	NAMES backtrace.h
-	PATHS
-		${LIBBACKTRACE_PKGCONF_INCLUDE_DIRS}
-		"/usr/include"
-		"/usr/local/include"
-)
-
-find_library(LIBBACKTRACE_LIBRARY
-	NAMES backtrace
-	PATHS
-		${LIBBACKTRACE_PKGCONF_LIBRARY_DIRS}
-		"/usr/lib"
-		"/usr/local/lib"
-)
-
-set(LIBBACKTRACE_PROCESS_INCLUDES LIBBACKTRACE_INCLUDE_DIR)
-set(LIBBACKTRACE_PROCESS_LIBS LIBBACKTRACE_LIBRARY)
-libfind_process(LIBBACKTRACE)
-
-if(LIBBACKTRACE_FOUND AND NOT TARGET libbacktrace)
-	add_library(libbacktrace UNKNOWN IMPORTED)
-	set_target_properties(
-		libbacktrace
-		PROPERTIES
-		IMPORTED_LOCATION "${LIBBACKTRACE_LIBRARY}"
-		INTERFACE_INCLUDE_DIRECTORIES "${LIBBACKTRACE_INCLUDE_DIR}"
-	)
-endif()
@@ -1,4 +1,4 @@
-# Version 2.4
+# Version 2.2
 # Public Domain, originally written by Lasse Kärkkäinen <tronic>
 # Maintained at https://github.com/Tronic/cmake-modules
 # Please send your improvements as pull requests on Github.
@@ -52,10 +52,6 @@ function (libfind_pkg_detect PREFIX)
  if (libraryargs)
    find_library(${PREFIX}_LIBRARY NAMES ${libraryargs} HINTS ${${PREFIX}_PKGCONF_LIBRARY_DIRS})
  endif()
-  # Read pkg-config version
-  if (${PREFIX}_PKGCONF_VERSION)
-    set(${PREFIX}_VERSION ${${PREFIX}_PKGCONF_VERSION} PARENT_SCOPE)
-  endif()
 endfunction()

 # Extracts a version #define from a version.h file, output stored to <PREFIX>_VERSION.
@@ -129,39 +125,24 @@ function (libfind_process PREFIX)

  # Process deps to add to
  foreach (i ${PREFIX} ${${PREFIX}_DEPENDENCIES})
-    if (DEFINED ${i}_INCLUDE_OPTS)
+    if (DEFINED ${i}_INCLUDE_OPTS OR DEFINED ${i}_LIBRARY_OPTS)
      # The package seems to export option lists that we can use, woohoo!
      list(APPEND includeopts ${${i}_INCLUDE_OPTS})
-    else()
-      if (DEFINED ${i}_INCLUDE_DIR)
-        # Singular forms can be used
-        list(APPEND includeopts ${i}_INCLUDE_DIR)
-      else()
-        if (DEFINED ${i}_INCLUDE_DIRS)
-          # Plural forms can be used
-          list(APPEND includeopts ${i}_INCLUDE_DIRS)
-        else()
-          # Oh no, we don't know the option names
-          message(FATAL_ERROR "We couldn't determine config variable names for ${i} includes. Aieeh!")
-        endif()
-      endif()
-    endif()
-
-    if (DEFINED ${i}_LIBRARY_OPTS)
-      # The package seems to export option lists that we can use, woohoo!
      list(APPEND libraryopts ${${i}_LIBRARY_OPTS})
    else()
-      if (DEFINED ${i}_LIBRARY)
+      # If plural forms don't exist or they equal singular forms
+      if ((NOT DEFINED ${i}_INCLUDE_DIRS AND NOT DEFINED ${i}_LIBRARIES) OR
+          ({i}_INCLUDE_DIR STREQUAL ${i}_INCLUDE_DIRS AND ${i}_LIBRARY STREQUAL ${i}_LIBRARIES))
        # Singular forms can be used
-        list(APPEND libraryopts ${i}_LIBRARY)
-      else()
-        if (DEFINED ${i}_LIBRARIES)
-          # Plural forms can be used
-          list(APPEND libraryopts ${i}_LIBRARIES)
-        else()
-          # Oh no, we don't know the option names
-          message(FATAL_ERROR "We couldn't determine config variable names for ${i} libraries. Aieeh!")
+        if (DEFINED ${i}_INCLUDE_DIR)
+          list(APPEND includeopts ${i}_INCLUDE_DIR)
        endif()
+        if (DEFINED ${i}_LIBRARY)
+          list(APPEND libraryopts ${i}_LIBRARY)
+        endif()
+      else()
+        # Oh no, we don't know the option names
+        message(FATAL_ERROR "We couldn't determine config variable names for ${i} includes and libs. Aieeh!")
      endif()
    endif()
  endforeach()
@@ -228,12 +209,12 @@ function (libfind_process PREFIX)
        message(STATUS "  ${PREFIX}_LIBRARY_OPTS=${libraryopts}")
        message(STATUS "  ${PREFIX}_LIBRARIES=${libs}")
      endif()
+      set (${PREFIX}_INCLUDE_OPTS ${includeopts} PARENT_SCOPE)
+      set (${PREFIX}_LIBRARY_OPTS ${libraryopts} PARENT_SCOPE)
+      set (${PREFIX}_INCLUDE_DIRS ${includes} PARENT_SCOPE)
+      set (${PREFIX}_LIBRARIES ${libs} PARENT_SCOPE)
+      set (${PREFIX}_FOUND TRUE PARENT_SCOPE)
    endif()
-    set (${PREFIX}_INCLUDE_OPTS ${includeopts} PARENT_SCOPE)
-    set (${PREFIX}_LIBRARY_OPTS ${libraryopts} PARENT_SCOPE)
-    set (${PREFIX}_INCLUDE_DIRS ${includes} PARENT_SCOPE)
-    set (${PREFIX}_LIBRARIES ${libs} PARENT_SCOPE)
-    set (${PREFIX}_FOUND TRUE PARENT_SCOPE)
    return()
  endif()

@@ -2,8 +2,6 @@

 # Core sources
 set(SRB2_CORE_SOURCES
-	core/memory.cpp
-	core/thread_pool.cpp
 	am_map.c
 	b_bot.c
 	command.c
@@ -20,21 +18,17 @@ set(SRB2_CORE_SOURCES
 	f_wipe.c
 	filesrch.c
 	g_game.c
-	g_demo.c
 	g_input.c
 	hu_stuff.c
 	i_tcp.c
 	info.c
-	k_hud.c
 	lzf.c
 	m_aatree.c
 	m_anigif.c
 	m_argv.c
 	m_bbox.c
 	m_cheat.c
-	m_curl.c
 	m_cond.c
-	m_emotes.cpp
 	m_fixed.c
 	m_menu.c
 	m_textinput.c
@@ -46,25 +40,19 @@ set(SRB2_CORE_SOURCES
 	mserv.c
 	http-mserv.c
 	qs22j.c
-	r_skins.c
 	s_sound.c
 	screen.c
 	sounds.c
 	st_stuff.c
-	string.c
+	#string.c
 	tables.c
 	v_video.c
 	w_wad.c
 	y_inter.c
-	z_zone.cpp
+	z_zone.c
 )

 set(SRB2_CORE_HEADERS
-	core/memory.h
-	core/thread_pool.h
-	m_curl.h
-	m_emotes.h
-	k_hud.h
 	am_map.h
 	b_bot.h
 	byteptr.h
@@ -90,7 +78,6 @@ set(SRB2_CORE_HEADERS
 	fastcmp.h
 	filesrch.h
 	g_game.h
-	g_demo.h
 	g_input.h
 	g_state.h
 	hu_stuff.h
@@ -122,7 +109,6 @@ set(SRB2_CORE_HEADERS
 	md5.h
 	mserv.h
 	qs22j.h
-	r_skins.h
 	s_sound.h
 	screen.h
 	sounds.h
@@ -137,18 +123,18 @@ set(SRB2_CORE_HEADERS
 )

 set(SRB2_CORE_RENDER_SOURCES
-	r_bsp.cpp
+	r_bsp.c
 	r_data.c
-	r_draw.cpp
-	r_fps.cpp
-	r_main.cpp
-	r_patch.cpp
-	r_patchrotation.cpp
-	r_plane.cpp
-	r_segs.cpp
+	r_draw.c
+	r_fps.c
+	r_main.c
+	r_patch.c
+	r_patchrotation.c
+	r_plane.c
+	r_segs.c
 	r_sky.c
 	r_splats.c
-	r_things.cpp
+	r_things.c
 	r_portal.c

 	r_bsp.h
@@ -176,7 +162,7 @@ set(SRB2_CORE_GAME_SOURCES
 	p_inter.c
 	p_lights.c
 	p_map.c
-	p_maputl.cpp
+	p_maputl.c
 	p_mobj.c
 	p_polyobj.c
 	p_saveg.c
@@ -207,6 +193,10 @@ set(SRB2_CORE_GAME_SOURCES
 	k_stats.h
 )

+if(NOT (CMAKE_CXX_COMPILER_ID MATCHES "Clang"))
+	set(SRB2_CORE_SOURCES ${SRB2_CORE_SOURCES} string.c)
+endif()
+
 prepend_sources(SRB2_CORE_SOURCES)
 prepend_sources(SRB2_CORE_HEADERS)
 prepend_sources(SRB2_CORE_RENDER_SOURCES)
@@ -236,23 +226,10 @@ set(SRB2_CONFIG_HWRENDER ON CACHE BOOL
 	"Enable hardware rendering through OpenGL.")
 set(SRB2_CONFIG_STATIC_OPENGL OFF CACHE BOOL
 	"Use statically linked OpenGL. NOT RECOMMENDED.")
+set(SRB2_CONFIG_USE_FBO_OGL ON CACHE BOOL
+	"Enable OpenGL FBO Downsampling support.")
 set(SRB2_CONFIG_DEDICATED OFF CACHE BOOL
 	"Build a dedicated server.")
-set(SRB2_CONFIG_LIBBACKTRACE ON CACHE BOOL
-	"Enable using libbacktrace for crashlogs.")
-set(SRB2_CONFIG_LTO ON CACHE BOOL
-	"Enable link time optimizations, improves performance at the cost of longer link times.")
-set(SRB2_CONFIG_ASAN OFF CACHE BOOL
-	"Compile with AddressSanitizer (libasan).")
-set(SRB2_CONFIG_UBSAN OFF CACHE BOOL
-	"Compile with UndefinedBehaviorSanitizer (libubsan).")
-
-set(SRB2_CONFIG_SATURNPAK ON CACHE BOOL
-	"Enable Saturn specific special packet. Required for using the newer resynch system")
-set(SRB2_CONFIG_SATURNJOIN ON CACHE BOOL
-	"Enable Saturn specific allowjoin toggle.")
-set(SRB2_CONFIG_SCREENFBO ON CACHE BOOL
-	"Enable hardware renderer (OpenGL) FBO downsampling support")

 if(${SRB2_CONFIG_DEDICATED})
 	set(SRB2_CONFIG_HAVE_GME NO)
@@ -492,36 +469,16 @@ if(${SRB2_CONFIG_HAVE_CURL})
 	endif()
 endif()

-if(${SRB2_CONFIG_LIBBACKTRACE})
-	if(${SRB2_CONFIG_USE_INTERNAL_LIBRARIES})
-        if(${SRB2_SYSTEM_BITS} EQUAL 64)
-			set(LIBBACKTRACE_FOUND ON)
-			set(LIBBACKTRACE_INCLUDE_DIRS ${CMAKE_SOURCE_DIR}/libs/libbacktrace/include)
-			set(LIBBACKTRACE_LIBRARIES "-L${CMAKE_SOURCE_DIR}/libs/libbacktrace/lib/x86_64 -lbacktrace")
-		else() # 32-bit
-			message(WARNING "libbacktrace is unsupported on 32-bit builds.")
-		endif()
-	else()
-		find_package(libbacktrace)
-	endif()
-	if(${LIBBACKTRACE_FOUND})
-		set(SRB2_HAVE_LIBBACKTRACE ON)
-		add_definitions(-DHAVE_LIBBACKTRACE)
-	else()
-		message(WARNING "You have specified that libbacktrace is available but it was not found.")
-	endif()
-endif()
-
 if(${SRB2_CONFIG_HWRENDER})
 	add_definitions(-DHWRENDER)
 	set(SRB2_HWRENDER_SOURCES
 		${CMAKE_CURRENT_SOURCE_DIR}/hardware/hw_batching.c
 		${CMAKE_CURRENT_SOURCE_DIR}/hardware/hw_shaders.c
 		${CMAKE_CURRENT_SOURCE_DIR}/hardware/hw_bsp.c
-		${CMAKE_CURRENT_SOURCE_DIR}/hardware/hw_cache.cpp
+		${CMAKE_CURRENT_SOURCE_DIR}/hardware/hw_cache.c
 		${CMAKE_CURRENT_SOURCE_DIR}/hardware/hw_clip.c
 		${CMAKE_CURRENT_SOURCE_DIR}/hardware/hw_draw.c
-		${CMAKE_CURRENT_SOURCE_DIR}/hardware/hw_main.cpp
+		${CMAKE_CURRENT_SOURCE_DIR}/hardware/hw_main.c
 		${CMAKE_CURRENT_SOURCE_DIR}/hardware/hw_portal.c
 		${CMAKE_CURRENT_SOURCE_DIR}/hardware/hw_md2.c
 		${CMAKE_CURRENT_SOURCE_DIR}/hardware/hw_md2load.c
@@ -536,6 +493,7 @@ if(${SRB2_CONFIG_HWRENDER})
 		${CMAKE_CURRENT_SOURCE_DIR}/hardware/hw_clip.h
 		${CMAKE_CURRENT_SOURCE_DIR}/hardware/hw_data.h
 		${CMAKE_CURRENT_SOURCE_DIR}/hardware/hw_defs.h
+		${CMAKE_CURRENT_SOURCE_DIR}/hardware/hw_dll.h
 		${CMAKE_CURRENT_SOURCE_DIR}/hardware/hw_gl.h
 		${CMAKE_CURRENT_SOURCE_DIR}/hardware/hw_glob.h
 		${CMAKE_CURRENT_SOURCE_DIR}/hardware/hw_main.h
@@ -554,6 +512,7 @@ if(${SRB2_CONFIG_HWRENDER})
 	set(SRB2_R_OPENGL_HEADERS
 		${CMAKE_CURRENT_SOURCE_DIR}/hardware/r_opengl/r_opengl.h
 	)
+
 endif()

 if(${SRB2_CONFIG_HWRENDER} AND ${SRB2_CONFIG_STATIC_OPENGL})
@@ -566,40 +525,25 @@ if(${SRB2_CONFIG_HWRENDER} AND ${SRB2_CONFIG_STATIC_OPENGL})
 	endif()
 endif()

-if(${SRB2_CONFIG_HWRENDER} AND ${SRB2_CONFIG_SCREENFBO})
-	add_definitions(-DUSE_FBO_OGL)
-endif()
-
-if(${SRB2_CONFIG_SATURNPAK})
-	add_definitions(-DDOSATURNPAK)
-endif()
-
-if(${SRB2_CONFIG_SATURNJOIN})
-	add_definitions(-DDOSATURNJOIN)
+if(${SRB2_CONFIG_HWRENDER})
+	if(${SRB2_CONFIG_USE_FBO_OGL})
+		set(SRB2_USE_FBO_OGL ON)
+		add_definitions(-DUSE_FBO_OGL)
+	endif()
 endif()

 # Targets

 # Compatibility flag with later versions of GCC
 # We should really fix our code to not need this
-if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU" OR "${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
-	if (CMAKE_SYSTEM_PROCESSOR MATCHES "^(x86_64|x64|amd64|AMD64|em64t|EM64T)")
-		add_compile_options(-mno-ms-bitfields)
-	endif()
-	add_compile_options(-Wno-trigraphs)
+if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
+	set(CMAKE_C_FLAGS ${CMAKE_C_FLAGS} -mno-ms-bitfields)
 endif()

-# TODO: fix prng and P_CreateBlockmap overflow at some point
-add_compile_options(-fwrapv)
-
-if (${CMAKE_BUILD_TYPE} MATCHES Debug)
-	add_compile_options(-O0)
-else()
-	add_compile_options(-O3)
+if (CMAKE_CXX_COMPILER_ID MATCHES "Clang")
+	set(CMAKE_C_FLAGS ${CMAKE_C_FLAGS} -Wno-absolute-value)
 endif()

-add_compile_options(-g)
-
 add_definitions(-DCMAKECONFIG)

 #add_library(SRB2Core STATIC
@@ -13,13 +13,13 @@
 #ifndef __COMMAND_H__
 #define __COMMAND_H__

-#include <stdio.h>
-#include "doomdef.h"
-
 #ifdef __cplusplus
 extern "C" {
 #endif

+#include <stdio.h>
+#include "doomdef.h"
+
 //===================================
 // Command buffer & command execution
 //===================================
@@ -11,6 +11,21 @@

 #ifdef CMAKECONFIG

+// Base SRB2 hashes
+#define ASSET_HASH_SRB2_SRB      "${SRB2_ASSET_srb2.srb_HASH}"
+#ifdef USE_PATCH_DTA
+#define ASSET_HASH_PATCH_DTA     "${SRB2_ASSET_patch.dta_HASH}"
+#endif
+
+// SRB2Kart-specific hashes
+#define ASSET_HASH_GFX_KART      "${SRB2_ASSET_gfx.kart_HASH}"
+#define ASSET_HASH_TEXTURES_KART "${SRB2_ASSET_textures.kart_HASH}"
+#define ASSET_HASH_CHARS_KART    "${SRB2_ASSET_chars.kart_HASH}"
+#define ASSET_HASH_MAPS_KART     "${SRB2_ASSET_maps.kart_HASH}"
+#ifdef USE_PATCH_KART
+#define ASSET_HASH_PATCH_KART    "00000000000000000000000000000000"
+#endif
+
 #define SRB2_COMP_REVISION       "${SRB2_COMP_REVISION}"
 #define SRB2_COMP_BRANCH         "${SRB2_COMP_BRANCH}"

@@ -18,10 +33,30 @@

 #else

-#define SRB2_COMP_REVISION       ""
-#define SRB2_COMP_BRANCH         ""
+/* Manually defined asset hashes for non-CMake builds
+ * Last updated 2015 / 05 / 03 - SRB2 v2.1.15 - srb2.srb
+ * Last updated 2018 / 12 / 23 - SRB2 v2.1.22 - patch.dta
+ * Last updated 2019 / 01 / 18 - Kart v1.0.2 - Main assets
+ * Last updated 2020 / 08 / 30 - Kart v1.3 - patch.kart
+ * Last updated 2022 / 08 / 16 - Kart v1.4 - Main assets
+ * Last updated 2022 / 08 / 19 - Kart v1.5 - gfx.kart
+ * Last updated 2022 / 11 / 01 - Kart v1.6 - gfx.kart, maps.kart
+ */

-#define CMAKE_ASSETS_DIR         ""
+// Base SRB2 hashes
+#define ASSET_HASH_SRB2_SRB      "c1b9577687f8a795104aef4600720ea7"
+#ifdef USE_PATCH_DTA
+#define ASSET_HASH_PATCH_DTA     "b04fd9624bfd94dc96dcf4f400f7deb4"
+#endif
+
+// SRB2Kart-specific hashes
+#define ASSET_HASH_GFX_KART      "06f86ee16136eb8a7043b15001797034"
+#define ASSET_HASH_TEXTURES_KART "abb53d56aba47c3a8cb0f764da1c8b80"
+#define ASSET_HASH_CHARS_KART    "e2c428347dde52858a3dacd29fc5b964"
+#define ASSET_HASH_MAPS_KART     "d051e55141ba736582228c456953cd98"
+#ifdef USE_PATCH_KART
+#define ASSET_HASH_PATCH_KART    "00000000000000000000000000000000"
+#endif

 #endif
 #endif
@@ -80,31 +80,6 @@

 #include "lua_script.h"

-/* Manually defined asset hashes for non-CMake builds
- * Last updated 2015 / 05 / 03 - SRB2 v2.1.15 - srb2.srb
- * Last updated 2018 / 12 / 23 - SRB2 v2.1.22 - patch.dta
- * Last updated 2019 / 01 / 18 - Kart v1.0.2 - Main assets
- * Last updated 2020 / 08 / 30 - Kart v1.3 - patch.kart
- * Last updated 2022 / 08 / 16 - Kart v1.4 - Main assets
- * Last updated 2022 / 08 / 19 - Kart v1.5 - gfx.kart
- * Last updated 2022 / 11 / 01 - Kart v1.6 - gfx.kart, maps.kart
- */
-
-// Base SRB2 hashes
-#define ASSET_HASH_SRB2_SRB      "c1b9577687f8a795104aef4600720ea7"
-#ifdef USE_PATCH_DTA
-#define ASSET_HASH_PATCH_DTA     "b04fd9624bfd94dc96dcf4f400f7deb4"
-#endif
-
-// SRB2Kart-specific hashes
-#define ASSET_HASH_GFX_KART      "06f86ee16136eb8a7043b15001797034"
-#define ASSET_HASH_TEXTURES_KART "abb53d56aba47c3a8cb0f764da1c8b80"
-#define ASSET_HASH_CHARS_KART    "e2c428347dde52858a3dacd29fc5b964"
-#define ASSET_HASH_MAPS_KART     "d051e55141ba736582228c456953cd98"
-#ifdef USE_PATCH_KART
-#define ASSET_HASH_PATCH_KART    "00000000000000000000000000000000"
-#endif
-
 #ifdef CMAKECONFIG
 #include "config.h"
 #else
@@ -907,9 +882,7 @@ void D_ClearState(void)

 	// okay, stop now
 	// (otherwise the game still thinks we're playing!)
-#ifdef HAVE_CURL
 	CURLAbortFile();
-#endif
 	SV_StopServer();
 	SV_ResetServer();

@@ -54,9 +54,6 @@
 #include "fastcmp.h"
 #include "m_perfstats.h"

-#include "r_data.h"
-#include "r_skins.h"
-
 #ifdef NETGAME_DEVMODE
 #define CV_RESTRICT CV_NETVAR
 #else
@@ -1009,9 +1006,6 @@ void D_RegisterClientCommands(void)
 		CV_RegisterVar(&cv_gamepadled[i]);
 	}

-	CV_RegisterVar(&cv_gamepadledifunfocused);
-	CV_RegisterVar(&cv_rumbleifunfocused);
-
 	CV_RegisterVar(&cv_usemouse);
 	CV_RegisterVar(&cv_invertmouse);
 	CV_RegisterVar(&cv_mousexsens);
@@ -2658,6 +2652,7 @@ static void Command_Map_f(void)
 		return;
 	}

+
 	last_map_cmd = I_GetTime();

 	size_t first_option;
@@ -1,75 +1,21 @@
 # Declare dedicated interface sources

-set(SRB2_DEDICATED_SOURCES
-	i_system.c
-	i_main.c
-	i_video.c
-	i_sound.c
-	i_threads.c
-	dosstr.c
-	endtxt.c
-)
+target_sourcefile(c)

-set(SRB2_DEDICATED_HEADERS
-	endtxt.h
-)
-
-source_group("Interface Code" FILES ${SRB2_DEDICATED_SOURCES} ${SRB2_DEDICATED_HEADERS})
-
-set(SRB2_DEDICATED_TOTAL_SOURCES
-	${SRB2_CORE_SOURCES}
-	${SRB2_CORE_HEADERS}
-	${SRB2_PNG_SOURCES}
-	${SRB2_PNG_HEADERS}
-	${SRB2_CORE_RENDER_SOURCES}
-	${SRB2_CORE_GAME_SOURCES}
-	${SRB2_LUA_SOURCES}
-	${SRB2_LUA_HEADERS}
-	${SRB2_BLUA_SOURCES}
-	${SRB2_BLUA_HEADERS}
-	${SRB2_DEDICATED_SOURCES}
-	${SRB2_DEDICATED_HEADERS}
-)
-
-source_group("Main" FILES ${SRB2_CORE_SOURCES} ${SRB2_CORE_HEADERS})
-source_group("Renderer" FILES ${SRB2_CORE_RENDER_SOURCES})
-source_group("Game" FILES ${SRB2_CORE_GAME_SOURCES})
-source_group("LUA" FILES ${SRB2_LUA_SOURCES} ${SRB2_LUA_HEADERS})
-source_group("LUA\\Interpreter" FILES ${SRB2_BLUA_SOURCES} ${SRB2_BLUA_HEADERS})
+target_sources(SRB2SDL2 PRIVATE)

 if(${CMAKE_SYSTEM} MATCHES Windows)
-	set(SRB2_DEDICATED_TOTAL_SOURCES ${SRB2_DEDICATED_TOTAL_SOURCES}
-		${CMAKE_SOURCE_DIR}/src/win32/win_dbg.c
-		${CMAKE_SOURCE_DIR}/src/win32/Srb2win.rc
-	)
+	target_sources(SRB2SDL2 PRIVATE
+		../win32/win_dbg.c
+		../win32/Srb2win.rc)
 endif()

-add_executable(SRB2SDL2 MACOSX_BUNDLE WIN32 ${SRB2_DEDICATED_TOTAL_SOURCES})
-
 if(${CMAKE_SYSTEM} MATCHES Windows)
-	set_target_properties(SRB2SDL2 PROPERTIES OUTPUT_NAME srb2kartd)
+	set_target_properties(SRB2SDL2 PROPERTIES OUTPUT_NAME srb2legacy)
 elseif(${CMAKE_SYSTEM} MATCHES Linux)
-	set_target_properties(SRB2SDL2 PROPERTIES OUTPUT_NAME lsrb2kartd)
+	set_target_properties(SRB2SDL2 PROPERTIES OUTPUT_NAME lsrb2dlegacy)
 else()
-	set_target_properties(SRB2SDL2 PROPERTIES OUTPUT_NAME srb2kartd)
-endif()
-
-if(${CMAKE_SYSTEM} MATCHES Darwin)
-	find_library(CORE_FOUNDATION_LIBRARY "CoreFoundation")
-	target_link_libraries(SRB2SDL2 PRIVATE
-		${CORE_FOUNDATION_LIBRARY}
-	)
-	set_target_properties(SRB2SDL2 PROPERTIES OUTPUT_NAME "${CPACK_PACKAGE_DESCRIPTION_SUMMARY}")
-
-	# Configure the app bundle icon and plist properties
-	target_sources(SRB2SDL2 PRIVATE "${CMAKE_CURRENT_SOURCE_DIR}/macosx/Srb2mac.icns")
-	set_target_properties(SRB2SDL2 PROPERTIES
-		MACOSX_BUNDLE_ICON_FILE "Srb2mac"
-		MACOSX_BUNDLE_BUNDLE_NAME "Sonic Robo Blast 2"
-		MACOSX_BUNDLE_BUNDLE_VERSION ${SRB2_VERSION}
-
-		RESOURCE "${CMAKE_CURRENT_SOURCE_DIR}/macosx/Srb2mac.icns"
-	)
+	set_target_properties(SRB2SDL2 PROPERTIES OUTPUT_NAME srb2legacy)
 endif()

 if(${CMAKE_SYSTEM} MATCHES Darwin)
@@ -78,27 +24,25 @@ if(${CMAKE_SYSTEM} MATCHES Darwin)
 		${CORE_LIB}
 		${PNG_LIBRARIES}
 		${ZLIB_LIBRARIES}
-		${CURL_LIBRARIES}
 	)
 	set_target_properties(SRB2SDL2 PROPERTIES OUTPUT_NAME "${CPACK_PACKAGE_DESCRIPTION_SUMMARY}")
 else()
 	target_link_libraries(SRB2SDL2 PRIVATE
 		${PNG_LIBRARIES}
 		${ZLIB_LIBRARIES}
-		${CURL_LIBRARIES}
 	)
+
 	if(${CMAKE_SYSTEM} MATCHES Linux)
 		target_link_libraries(SRB2SDL2 PRIVATE
 			m
 			rt
-			pthread
 		)
 	endif()
 endif()

-if(${SRB2_HAVE_LIBBACKTRACE})
-	target_link_libraries(SRB2SDL2 PRIVATE ${LIBBACKTRACE_LIBRARIES})
-endif()
+#target_link_libraries(SRB2SDL2 PRIVATE SRB2Core)
+
+set_target_properties(SRB2SDL2 PROPERTIES VERSION ${SRB2_VERSION})

 if(${CMAKE_SYSTEM} MATCHES Windows)
 	target_link_libraries(SRB2SDL2 PRIVATE
@@ -116,34 +60,19 @@ target_include_directories(SRB2SDL2 PRIVATE

 target_compile_definitions(SRB2SDL2 PRIVATE
 	-DDEDICATED
-	-DHAVE_THREADS
 )

-if(SRB2_CONFIG_LTO AND NOT SRB2_CONFIG_DEBUGMODE)
-	set_property(TARGET SRB2SDL2 PROPERTY INTERPROCEDURAL_OPTIMIZATION TRUE)
-endif()
-
-if(SRB2_CONFIG_ASAN)
-	target_compile_options(SRB2SDL2 PRIVATE -fsanitize=address)
-	target_link_options(SRB2SDL2 PRIVATE -fsanitize=address)
-endif()
-
-if(SRB2_CONFIG_UBSAN)
-	target_compile_options(SRB2SDL2 PRIVATE -fsanitize=undefined)
-	target_link_options(SRB2SDL2 PRIVATE -fsanitize=undefined)
-endif()
-
 ## strip debug symbols into separate file when using gcc
-# if(CMAKE_COMPILER_IS_GNUCC)
-# 	if(${CMAKE_BUILD_TYPE} MATCHES Debug)
-# 		message(STATUS "Will make separate debug symbols in *.debug")
-# 		add_custom_command(TARGET SRB2SDL2 POST_BUILD
-# 			COMMAND ${OBJCOPY} --only-keep-debug $<TARGET_FILE:SRB2SDL2> $<TARGET_FILE:SRB2SDL2>.debug
-# 			COMMAND ${OBJCOPY} --strip-debug $<TARGET_FILE:SRB2SDL2>
-# 			COMMAND ${OBJCOPY} --add-gnu-debuglink=$<TARGET_FILE_NAME:SRB2SDL2>.debug $<TARGET_FILE:SRB2SDL2>
-# 		)
-# 	endif()
-# endif()
+if(CMAKE_COMPILER_IS_GNUCC)
+	if(${CMAKE_BUILD_TYPE} MATCHES Debug)
+		message(STATUS "Will make separate debug symbols in *.debug")
+		add_custom_command(TARGET SRB2SDL2 POST_BUILD
+			COMMAND ${OBJCOPY} --only-keep-debug $<TARGET_FILE:SRB2SDL2> $<TARGET_FILE:SRB2SDL2>.debug
+			COMMAND ${OBJCOPY} --strip-debug $<TARGET_FILE:SRB2SDL2>
+			COMMAND ${OBJCOPY} --add-gnu-debuglink=$<TARGET_FILE_NAME:SRB2SDL2>.debug $<TARGET_FILE:SRB2SDL2>
+		)
+	endif()
+endif()

 #### Installation ####
 if(${CMAKE_SYSTEM} MATCHES Darwin)
@@ -180,6 +180,10 @@ static char returnWadPath[256];

 #include "../m_argv.h"

+#ifdef MAC_ALERT
+#include "macosx/mac_alert.h"
+#endif
+
 #include "../d_main.h"

 #if !defined(NOMUMBLE) && defined(HAVE_MUMBLE)
@@ -40,45 +40,22 @@
 #define ASMCALL
 #endif

+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #include "doomtype.h"

-#ifdef __cplusplus               /* Only when compiled as C++ */
-    #include <algorithm>        /* std::min, std::max, std::sort, … */
-#endif
-
-#ifdef __cplusplus
-// Force libc++ to expose std::min/std::max even when <cmath> is included first (Apple clang quirk)
-#ifndef _LIBCPP_ENABLE_CXX17_REMOVED_FEATURES
-#define _LIBCPP_ENABLE_CXX17_REMOVED_FEATURES
-#endif
-#ifndef _LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS
-#define _LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS
-#endif
-
-// Optional: only try <version> if it actually exists (newer Xcode)
-#if __has_include(<version>)
-#include <version>
-#endif
-
-#define _USE_MATH_DEFINES
-#include <cmath>
-#include <cstdarg>
-#include <cstdio>
-#include <cstdlib>
-#include <cstddef>
-#include <cstring>
-#include <climits>
-
-extern "C" {
-#else
-#include <math.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <stdlib.h>
-#include <stddef.h>
 #include <string.h>

-#include <limits.h>
+#define _USE_MATH_DEFINES // fixes M_PI errors in r_plane.c for Visual Studio
+#ifdef __cplusplus
+#include <cmath>
+#else
+#include <math.h>
 #endif

 #include <sys/types.h>
@@ -456,10 +456,10 @@ consvar_t cv_litesteer[MAXSPLITSCREENPLAYERS] = {

 //static CV_PossibleValue_t autoaccelcons_t[] = {{0, "Off"}, {1, "Manual"}, {2, "Automatic"}, {0, NULL}};
 consvar_t cv_autoaccel[MAXSPLITSCREENPLAYERS] = {
-	{"kartautoaccel",  "Off", CV_SAVE, CV_OnOff, NULL, 0, NULL, NULL, 0, 0, NULL},
-	{"kartautoaccel2", "Off", CV_SAVE, CV_OnOff, NULL, 0, NULL, NULL, 0, 0, NULL},
-	{"kartautoaccel3", "Off", CV_SAVE, CV_OnOff, NULL, 0, NULL, NULL, 0, 0, NULL},
-	{"kartautoaccel4", "Off", CV_SAVE, CV_OnOff, NULL, 0, NULL, NULL, 0, 0, NULL}
+	{"autoaccel",  "Off", CV_SAVE, CV_OnOff, NULL, 0, NULL, NULL, 0, 0, NULL},
+	{"autoaccel2", "Off", CV_SAVE, CV_OnOff, NULL, 0, NULL, NULL, 0, 0, NULL},
+	{"autoaccel3", "Off", CV_SAVE, CV_OnOff, NULL, 0, NULL, NULL, 0, 0, NULL},
+	{"autoaccel4", "Off", CV_SAVE, CV_OnOff, NULL, 0, NULL, NULL, 0, 0, NULL}
 };

 static CV_PossibleValue_t driftsparkpulse_t[] = {{0, "MIN"}, {FRACUNIT*3, "MAX"}, {0, NULL}};
@@ -81,9 +81,6 @@ consvar_t cv_gamepadled[MAXSPLITSCREENPLAYERS] = {
 	{"gamepadled4", "Skincolor", CV_SAVE|CV_CALL|CV_NOINIT, gamepadled_cons_t, led_off_handle4, 0, NULL, NULL, 0, 0, NULL}
 };

-consvar_t cv_gamepadledifunfocused = {"gamepadledunfocused",  "Off", CV_SAVE, CV_OnOff, NULL, 0, NULL, NULL, 0, 0, NULL};
-consvar_t cv_rumbleifunfocused = {"rumbleifunfocused",  "Off", CV_SAVE, CV_OnOff, NULL, 0, NULL, NULL, 0, 0, NULL};
-
 static void rumble_off_handle(void)
 {
 	if (!cv_rumble[0].value)
@@ -933,7 +930,7 @@ void G_SetPlayerGamepadIndicatorColor(INT32 playernum, UINT8 color)

 	I_Assert(playernum >= 0 && playernum < MAXSPLITSCREENPLAYERS);

-	if (cv_gamepadled[playernum].value == 0 || (window_notinfocus && cv_gamepadledifunfocused.value == 0)
+	if (cv_gamepadled[playernum].value == 0
 	 || color >= MAXTRANSLATIONS)
 	{
 		return;
@@ -1012,7 +1009,7 @@ void G_PlayerDeviceRumble(INT32 playernum, UINT16 low_strength, UINT16 high_stre
 {
 	I_Assert(playernum >= 0 && playernum < MAXSPLITSCREENPLAYERS);

-	if (cv_rumble[playernum].value == 0 || (window_notinfocus && cv_rumbleifunfocused.value == 0))
+	if (cv_rumble[playernum].value == 0)
 	{
 		return;
 	}
@@ -116,9 +116,6 @@ extern consvar_t cv_rumble[MAXSPLITSCREENPLAYERS];
 extern consvar_t cv_rumblestrength[MAXSPLITSCREENPLAYERS];
 extern consvar_t cv_gamepadled[MAXSPLITSCREENPLAYERS];

-extern consvar_t cv_gamepadledifunfocused;
-extern consvar_t cv_rumbleifunfocused;
-
 extern INT32 mousex, mousey;

 extern INT32 joyxmove[MAXSPLITSCREENPLAYERS][JOYAXISSET], joyymove[MAXSPLITSCREENPLAYERS][JOYAXISSET];
@@ -2,7 +2,7 @@ hw_bsp.c
 hw_draw.c
 hw_main.cpp
 hw_clip.c
-hw_md2.c
+hw_md2.cpp
 hw_cache.c
 hw_md2load.c
 hw_md3load.c
@@ -16,6 +16,7 @@
 #ifdef HWRENDER

 #include <unordered_set>
+#include <unordered_map>

 #include "hw_main.h"
 #include "hw_glob.h"
@@ -35,6 +36,10 @@
 #include "../p_spec.h" // anim_t
 #include "../r_sky.h"

+struct ColorMipMap {
+	std::unordered_map<const UINT8*, GLMipmap_t*> map;
+};
+
 INT32 patchformat = GL_TEXFMT_AP_88; // use alpha for holes
 INT32 textureformat = GL_TEXFMT_P_8; // use chromakey for hole

@@ -448,7 +453,7 @@ typedef struct
 } GLMapTextureSet_t; // idk i suck at naming things

 static size_t gl_numtextures = 0; // Texture count
-static GLMapTextureSet_t *gl_textures; // For all textures
+static GLMapTextureSet_t *gl_textures = NULL; // For all textures

 static void HWR_FreeTextureData(patch_t *patch)
 {
@@ -504,34 +509,31 @@ static void HWR_FreeTextureColormaps(patch_t *patch)
 		return;

 	// The mipmap must be valid, obviously
-	while (pat->mipmap)
+	if (!pat->mipmap)
+		return;
+
+	if (pat->mipmap->nextcolormap)
 	{
-		// Confusing at first, but pat->mipmap->nextcolormap
-		// at the beginning of the loop is the first colormap
-		// from the linked list of colormaps.
-		GLMipmap_t *next = NULL;
+		for (auto& pair : pat->mipmap->nextcolormap->map)
+		{
+			GLMipmap_t *glMipmap = pair.second;

-		// No mipmap in this patch, break out of the loop.
-		if (!pat->mipmap)
-			break;
+			if (glMipmap)
+			{
+				// Free image data from memory.
+				Z_Free(glMipmap->data);
+				Z_Free(glMipmap->colormap);
+				glMipmap->data = NULL;
+				glMipmap->colormap = NULL;
+				GL_DeleteTexture(glMipmap);

-		// No colormap mipmaps either.
-		if (!pat->mipmap->nextcolormap)
-			break;
+				// Free the colormap mipmap from memory.
+				free(glMipmap);
+			}
+		}

-		// Set the first colormap to the one that comes after it.
-		next = pat->mipmap->nextcolormap;
-		pat->mipmap->nextcolormap = next->nextcolormap;
-
-		// Free image data from memory.
-		Z_Free(next->data);
-		Z_Free(next->colormap);
-		next->data = NULL;
-		next->colormap = NULL;
-		GL_DeleteTexture(next);
-
-		// Free the old colormap mipmap from memory.
-		free(next);
+		delete pat->mipmap->nextcolormap;
+		pat->mipmap->nextcolormap = NULL;
 	}
 }

@@ -1085,7 +1087,7 @@ void HWR_GetPatch(patch_t *patch)
 void HWR_GetMappedPatch(patch_t *patch, const UINT8 *colormap)
 {
 	GLPatch_t *glPatch;
-	GLMipmap_t *glMipmap, *newMipmap;
+	GLMipmap_t *newMipmap;

 	if (!patch->hardware)
 		Patch_CreateGL(patch);
@@ -1099,11 +1101,19 @@ void HWR_GetMappedPatch(patch_t *patch, const UINT8 *colormap)
 		return;
 	}

-	// search for the mipmap
-	// skip the first (no colormap translated)
-	for (glMipmap = glPatch->mipmap; glMipmap->nextcolormap;)
+	// gotta make our map if theres none
+	if (!glPatch->mipmap->nextcolormap)
 	{
-		glMipmap = glMipmap->nextcolormap;
+		glPatch->mipmap->nextcolormap = new ColorMipMap();
+	}
+
+	// search for the mipmap
+	auto& map = glPatch->mipmap->nextcolormap->map;
+	auto it = map.find(colormap);
+
+	if (it != map.end())
+	{
+		GLMipmap_t *glMipmap = it->second;

 		if (glMipmap->colormap && glMipmap->colormap->source == colormap)
 		{
@@ -1113,7 +1123,9 @@ void HWR_GetMappedPatch(patch_t *patch, const UINT8 *colormap)
 				HWR_UpdatePatchMipmap(patch, glMipmap);
 			}
 			else
+			{
 				HWR_LoadPatchMipmap(patch, glMipmap);
+			}

 			return;
 		}
@@ -1128,7 +1140,9 @@ void HWR_GetMappedPatch(patch_t *patch, const UINT8 *colormap)
 	newMipmap = static_cast<GLMipmap_t *>(calloc(1, sizeof (*newMipmap)));
 	if (newMipmap == NULL)
 		I_Error("%s: Out of memory", "HWR_GetMappedPatch");
-	glMipmap->nextcolormap = newMipmap;
+
+	// add to nextcolormap map
+	map[colormap] = newMipmap;

 	newMipmap->colormap = static_cast<GLColormap_t *>(Z_Calloc(sizeof(*newMipmap->colormap), PU_HWRPATCHCOLMIPMAP, NULL));
 	newMipmap->colormap->source = colormap;
@@ -335,7 +335,7 @@ angle_t gld_FrustumAngle(angle_t tiltangle)
 	floatangle = 2.0 + (45.0 + ((double)tilt / 1.9)) * clipfov / 90.0;
 	if (floatangle >= 180.0)
 		return 0xffffffff;
-	a1 = (angle_t)lrint(ANG1 * floatangle);
+	a1 = (angle_t)xs_CRoundToInt(ANG1 * floatangle);
 	return a1;
 }

@@ -23,6 +23,7 @@

 typedef enum GLTextureFormat_e
 {
+	GL_TEXFMT_NULL					= 0x00,
 	GL_TEXFMT_P_8					= 0x01, /* 8-bit palette */
 	GL_TEXFMT_AP_88					= 0x02, /* 8-bit alpha, 8-bit palette */

@@ -54,7 +55,7 @@ struct GLMipmap_s
 	UINT16					width, height;
 	UINT32					downloaded; // The GPU has this texture.

-	struct	GLMipmap_s		*nextcolormap;
+	struct ColorMipMap		*nextcolormap;
 	struct GLColormap_s		*colormap;
 };
 typedef struct GLMipmap_s GLMipmap_t;
@@ -101,8 +101,7 @@ sector_t *gl_backsector = NULL;
 static constexpr float clipping_distances[] = {1024.0f, 2048.0f, 4096.0f, 6144.0f, 8192.0f, 12288.0f, 16384.0f};
 // values for bsp culling
 // slightly higher than the far clipping plane to compensate for impreciseness
-static constexpr INT32 bsp_culling_distances[] = {
-	(1024+512)*FRACUNIT, (2048+512)*FRACUNIT, (4096+512)*FRACUNIT,
+static constexpr INT32 bsp_culling_distances[] = {(1024+512)*FRACUNIT, (2048+512)*FRACUNIT, (4096+512)*FRACUNIT,
 	(6144+512)*FRACUNIT, (8192+512)*FRACUNIT, (12288+512)*FRACUNIT, (16384+512)*FRACUNIT};

 // Performance stats
@@ -588,11 +587,15 @@ static void HWR_RenderPlane(subsector_t *subsector, extrasubsector_t *xsub, bool
 	const sector_t *sec = FOFsector ? FOFsector : gl_frontsector;

 	// Get the slope pointer to simplify future code
-	if (!isceiling && sec->f_slope)
+	if (sec->f_slope && !isceiling)
 		slope = sec->f_slope;
-	else if (isceiling && sec->c_slope)
+	else if (sec->c_slope && isceiling)
 		slope = sec->c_slope;

+	// Set fixedheight to the slope's height from our viewpoint, if we have a slope
+	if (slope)
+		fixedheight = P_GetSlopeZAt(slope, viewx, viewy);
+
 	height = FixedToFloat(fixedheight);

 	// Allocate plane-vertex buffer if we need to
@@ -684,19 +687,18 @@ static void HWR_RenderPlane(subsector_t *subsector, extrasubsector_t *xsub, bool
 			vert->s = (tempxsow * cosangf) - (tempytow * sinangf);\
 			vert->t = (tempxsow * sinangf) + (tempytow * cosangf);\
 		}\
-\
-		if (slope)\
-		{\
-			fixedheight = P_GetSlopeZAt(slope, FloatToFixed((vx)), FloatToFixed((vy)));\
-			height = FixedToFloat(fixedheight);\
-		}\
 \
 		vert->x = (vx);\
 		vert->y = height;\
 		vert->z = (vy);\
 \
+		if (slope)\
+		{\
+			fixedheight = P_GetSlopeZAt(slope, FloatToFixed((vx)), FloatToFixed((vy)));\
+			vert->y = FixedToFloat(fixedheight);\
+		}\
 }
-	for (i = 0, v3d = planeVerts; i < (INT32)nrPlaneVerts; i++,v3d++, pv++)
+	for (i = 0, v3d = planeVerts; i < (INT32)nrPlaneVerts; i++,v3d++,pv++)
 		SETUP3DVERT(v3d, pv->x, pv->y);

 	if (slope)
@@ -1783,10 +1785,10 @@ void HWR_ProcessSeg(void) // Sort of like GLWall::Process in GZDoom
 		// Single sided line... Deal only with the middletexture (if one exists)
 		if (gl_midtexture && gl_linedef->special != HORIZONSPECIAL) // Ignore horizon line for OGL
 		{
-			fixed_t texturevpeg;
-
 			glTex = HWR_GetTexture(gl_midtexture, noencore);

+			fixed_t texturevpeg;
+
 			// PEGGING
 			if ((gl_linedef->flags & (ML_DONTPEGBOTTOM|ML_EFFECT2)) == (ML_DONTPEGBOTTOM|ML_EFFECT2))
 				texturevpeg = gl_frontsector->floorheight + textureheight[gl_sidedef->midtexture] - gl_frontsector->ceilingheight + gl_sidedef->rowoffset;
@@ -1873,8 +1875,8 @@ void HWR_ProcessSeg(void) // Sort of like GLWall::Process in GZDoom
 	//Hurdler: 3d-floors test
 	if (!gl_drawing_stencil && gl_backsector && gl_frontsector->tag != gl_backsector->tag && (gl_backsector->ffloors || gl_frontsector->ffloors))
 	{
-		ffloor_t *rover;
-		fixed_t highcut = 0, lowcut = 0;
+		ffloor_t * rover;
+		fixed_t    highcut = 0, lowcut = 0;
 		fixed_t lowcutslope = 0, highcutslope = 0;

 		// Used for height comparisons and etc across FOFs and slopes
@@ -2945,7 +2947,7 @@ static void HWR_Subsector(size_t num)
 	static sector_t tempsec; //SoM: 4/7/2000
 	INT32 floorlightlevel;
 	INT32 ceilinglightlevel;
-	INT32 locFloorHeight = 0, locCeilingHeight = 0;
+	INT32 locFloorHeight, locCeilingHeight;
 	INT32 cullFloorHeight, cullCeilingHeight;
 	INT32 light = 0;
 	extracolormap_t *floorcolormap;
@@ -2991,12 +2993,11 @@ static void HWR_Subsector(size_t num)

 	cullFloorHeight   = P_GetSectorFloorZAt  (gl_frontsector, viewx, viewy);
 	cullCeilingHeight = P_GetSectorCeilingZAt(gl_frontsector, viewx, viewy);
+	locFloorHeight    = P_GetSectorFloorZAt  (gl_frontsector, gl_frontsector->soundorg.x, gl_frontsector->soundorg.y);
+	locCeilingHeight  = P_GetSectorCeilingZAt(gl_frontsector, gl_frontsector->soundorg.x, gl_frontsector->soundorg.y);

 	if (gl_frontsector->ffloors)
 	{
-		locFloorHeight    = P_GetSectorFloorZAt  (gl_frontsector, gl_frontsector->soundorg.x, gl_frontsector->soundorg.y);
-		locCeilingHeight  = P_GetSectorCeilingZAt(gl_frontsector, gl_frontsector->soundorg.x, gl_frontsector->soundorg.y);
-
 		boolean anyMoved = gl_frontsector->moved;

 		if (anyMoved == false)
@@ -3051,7 +3052,8 @@ static void HWR_Subsector(size_t num)
 			{
 				HWR_GetFlat(levelflats[gl_frontsector->floorpic].lumpnum, R_NoEncore(gl_frontsector, false));
 				HWR_RenderPlane(sub, &extrasubsectors[num], false,
-					gl_frontsector->floorheight,
+					// Hack to make things continue to work around slopes.
+					locFloorHeight == cullFloorHeight ? locFloorHeight : gl_frontsector->floorheight,
 					// We now return you to your regularly scheduled rendering.
 					PF_Occlude, floorlightlevel, levelflats[gl_frontsector->floorpic].lumpnum, NULL, 255, floorcolormap);
 			}
@@ -3066,7 +3068,8 @@ static void HWR_Subsector(size_t num)
 			{
 				HWR_GetFlat(levelflats[gl_frontsector->ceilingpic].lumpnum, R_NoEncore(gl_frontsector, true));
 				HWR_RenderPlane(sub, &extrasubsectors[num], true,
-					gl_frontsector->ceilingheight,
+					// Hack to make things continue to work around slopes.
+					locCeilingHeight == cullCeilingHeight ? locCeilingHeight : gl_frontsector->ceilingheight,
 					// We now return you to your regularly scheduled rendering.
 					PF_Occlude, ceilinglightlevel, levelflats[gl_frontsector->ceilingpic].lumpnum, NULL, 255, ceilingcolormap);
 			}
@@ -5444,7 +5447,7 @@ static void HWR_SetTransformAiming(FTransform *trans)
 		fixed_t fixedaiming = AIMINGTODY(aimingangle);
 		trans->viewaiming = FixedToFloat(fixedaiming) * (static_cast<float>(vid.width) / static_cast<float>(vid.height)) / (static_cast<float>(BASEVIDWIDTH) / static_cast<float>(BASEVIDHEIGHT));
 		if (splitscreen == 1) // only for 2 player splitscreen
-			trans->viewaiming *= 2.125f; // splitscreen adjusts fov with 0.8, so compensate (but only halfway, since splitscreen means only half the screen is used)
+			trans->viewaiming *= 2.125; // splitscreen adjusts fov with 0.8, so compensate (but only halfway, since splitscreen means only half the screen is used)
 		trans->shearing = true;
 		gl_aimingangle = 0;
 	}
@@ -13,6 +13,7 @@
 ///	Inspired from md2.c by Mete Ciragan (mete@swissquake.ch)


+#include "hw_data.h"
 #ifdef __GNUC__
 #include <unistd.h>
 #endif
@@ -72,6 +73,12 @@
 #include <errno.h>
 #endif

+#include <unordered_map>
+
+struct ColorMipMap {
+	std::unordered_map<const UINT8*, GLMipmap_t*> map;
+};
+
 md2_t md2_models[NUMSPRITES] = {};
 md2_t md2_playermodels[MAXSKINS] = {};
 md2_t md2_localplayermodels[MAXLOCALSKINS] = {};
@@ -93,10 +100,10 @@ static void md2_freeModel (model_t *model)
 static model_t *md2_readModel(const char *filename)
 {
 	//Filename checking fixed ~Monster Iestyn and Golden
-	if (FIL_FileExists(va("%s"PATHSEP"%s", srb2home, filename)))
-		return LoadModel(va("%s"PATHSEP"%s", srb2home, filename), PU_STATIC);
-	else if (FIL_FileExists(va("%s"PATHSEP"%s", srb2path, filename)))
-		return LoadModel(va("%s"PATHSEP"%s", srb2path, filename), PU_STATIC);
+	if (FIL_FileExists(va("%s" PATHSEP "%s", srb2home, filename)))
+		return LoadModel(va("%s" PATHSEP "%s", srb2home, filename), PU_STATIC);
+	else if (FIL_FileExists(va("%s" PATHSEP "%s", srb2path, filename)))
+		return LoadModel(va("%s" PATHSEP "%s", srb2path, filename), PU_STATIC);
 	return NULL;
 }

@@ -159,18 +166,18 @@ static GLTextureFormat_t PNG_Load(const char *filename, int *w, int *h, GLPatch_
 #endif
 	volatile png_FILE_p png_FILE;
 	//Filename checking fixed ~Monster Iestyn and Golden
-	char *pngfilename = va("%s"PATHSEP"mdls"PATHSEP"%s", srb2home, filename);
+	char *pngfilename = va("%s" PATHSEP "mdls" PATHSEP "%s", srb2home, filename);

 	FIL_ForceExtension(pngfilename, ".png");
 	png_FILE = fopen(pngfilename, "rb");
 	if (!png_FILE)
 	{
-		pngfilename = va("%s"PATHSEP"mdls"PATHSEP"%s", srb2path, filename);
+		pngfilename = va("%s" PATHSEP "mdls" PATHSEP "%s", srb2path, filename);
 		FIL_ForceExtension(pngfilename, ".png");
 		png_FILE = fopen(pngfilename, "rb");
 		//CONS_Debug(DBG_RENDER, "M_SavePNG: Error on opening %s for loading\n", filename);
 		if (!png_FILE)
-			return 0;
+			return GL_TEXFMT_NULL;
 	}

 	png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL,
@@ -179,7 +186,7 @@ static GLTextureFormat_t PNG_Load(const char *filename, int *w, int *h, GLPatch_
 	{
 		CONS_Debug(DBG_RENDER, "PNG_Load: Error on initialize libpng\n");
 		fclose(png_FILE);
-		return 0;
+		return GL_TEXFMT_NULL;
 	}

 	png_info_ptr = png_create_info_struct(png_ptr);
@@ -188,7 +195,7 @@ static GLTextureFormat_t PNG_Load(const char *filename, int *w, int *h, GLPatch_
 		CONS_Debug(DBG_RENDER, "PNG_Load: Error on allocate for libpng\n");
 		png_destroy_read_struct(&png_ptr, NULL, NULL);
 		fclose(png_FILE);
-		return 0;
+		return GL_TEXFMT_NULL;
 	}

 #ifdef USE_FAR_KEYWORD
@@ -201,7 +208,7 @@ static GLTextureFormat_t PNG_Load(const char *filename, int *w, int *h, GLPatch_
 		png_destroy_read_struct(&png_ptr, &png_info_ptr, NULL);
 		fclose(png_FILE);
 		Z_Free(glpatch->mipmap->data);
-		return 0;
+		return GL_TEXFMT_NULL;
 	}
 #ifdef USE_FAR_KEYWORD
 	png_memcpy(png_jmpbuf(png_ptr), jmpbuf, sizeof jmp_buf);
@@ -241,8 +248,8 @@ static GLTextureFormat_t PNG_Load(const char *filename, int *w, int *h, GLPatch_

 	{
 		png_uint_32 i, pitch = png_get_rowbytes(png_ptr, png_info_ptr);
-		png_bytep PNG_image = Z_Malloc(pitch*height, PU_HWRMODELTEXTURE, &glpatch->mipmap->data);
-		png_bytepp row_pointers = png_malloc(png_ptr, height * sizeof (png_bytep));
+		png_bytep PNG_image = static_cast<png_bytep>(Z_Malloc(pitch*height, PU_HWRMODELTEXTURE, &glpatch->mipmap->data));
+		png_bytepp row_pointers = static_cast<png_bytepp>(png_malloc(png_ptr, height * sizeof (png_bytep)));
 		for (i = 0; i < height; i++)
 			row_pointers[i] = PNG_image + i*pitch;
 		png_read_image(png_ptr, row_pointers);
@@ -292,42 +299,42 @@ static GLTextureFormat_t PCX_Load(const char *filename, int *w, int *h,
 	INT32 ch, rep;
 	FILE *file;
 	//Filename checking fixed ~Monster Iestyn and Golden
-	char *pcxfilename = va("%s"PATHSEP"mdls"PATHSEP"%s", srb2home, filename);
+	char *pcxfilename = va("%s" PATHSEP "mdls" PATHSEP "%s", srb2home, filename);

 	FIL_ForceExtension(pcxfilename, ".pcx");
 	file = fopen(pcxfilename, "rb");
 	if (!file)
 	{
-		pcxfilename = va("%s"PATHSEP"mdls"PATHSEP"%s", srb2path, filename);
+		pcxfilename = va("%s" PATHSEP "mdls" PATHSEP "%s", srb2path, filename);
 		FIL_ForceExtension(pcxfilename, ".pcx");
 		file = fopen(pcxfilename, "rb");
 		if (!file)
-			return 0;
+			return GL_TEXFMT_NULL;
 	}

 	if (fread(&header, sizeof (PcxHeader), 1, file) != 1)
 	{
 		fclose(file);
-		return 0;
+		return GL_TEXFMT_NULL;
 	}

 	if (header.bitsPerPixel != 8)
 	{
 		fclose(file);
-		return 0;
+		return GL_TEXFMT_NULL;
 	}

 	fseek(file, -PALSIZE, SEEK_END);

 	pw = *w = header.xmax - header.xmin + 1;
 	ph = *h = header.ymax - header.ymin + 1;
-	image = Z_Malloc(pw*ph*4, PU_HWRMODELTEXTURE, &glpatch->mipmap->data);
+	image = static_cast<RGBA_t *>(Z_Malloc(pw*ph*4, PU_HWRMODELTEXTURE, &glpatch->mipmap->data));

 	if (fread(palette, sizeof (UINT8), PALSIZE, file) != PALSIZE)
 	{
 		Z_Free(image);
 		fclose(file);
-		return 0;
+		return GL_TEXFMT_NULL;
 	}
 	fseek(file, sizeof (PcxHeader), SEEK_SET);

@@ -369,8 +376,8 @@ static void md2_loadTexture(md2_t *model)

 	if (model->glpatch)
 	{
-		patch = model->glpatch;
-		glPatch = (GLPatch_t *)(patch->hardware);
+		patch = static_cast<patch_t *>(model->glpatch);
+		glPatch = static_cast<GLPatch_t *>(patch->hardware);
 		if (glPatch)
 			Z_Free(glPatch->mipmap->data);
 	}
@@ -381,7 +388,7 @@ static void md2_loadTexture(md2_t *model)
 		Patch_AllocateHardwarePatch(patch);

 	if (glPatch == NULL)
-		glPatch = (GLPatch_t *)(patch->hardware);
+		glPatch = static_cast<GLPatch_t *>(patch->hardware);

 	if (!glPatch->mipmap->downloaded && !glPatch->mipmap->data)
 	{
@@ -389,10 +396,10 @@ static void md2_loadTexture(md2_t *model)

 #ifdef HAVE_PNG
 		glPatch->mipmap->format = PNG_Load(filename, &w, &h, glPatch);
-		if (glPatch->mipmap->format == 0)
+		if (glPatch->mipmap->format == GL_TEXFMT_NULL)
 #endif
 		glPatch->mipmap->format = PCX_Load(filename, &w, &h, glPatch);
-		if (glPatch->mipmap->format == 0)
+		if (glPatch->mipmap->format == GL_TEXFMT_NULL)
 		{
 			model->notexturefile = true; // mark it so its not searched for again repeatedly
 			return;
@@ -412,7 +419,7 @@ static void md2_loadTexture(md2_t *model)
 			UINT32 size;
 			RGBA_t *image;
 			// Lactozilla: Apply colour cube
-			image = glPatch->mipmap->data;
+			image = static_cast<RGBA_t *>(glPatch->mipmap->data);
 			size = w*h;
 			while (size--)
 			{
@@ -433,7 +440,7 @@ static void md2_loadBlendTexture(md2_t *model)
 	patch_t *patch;
 	GLPatch_t *glPatch = NULL;

-	char *filename = Z_Malloc(strlen(model->filename)+7, PU_STATIC, NULL);
+	char *filename = static_cast<char *>(Z_Malloc(strlen(model->filename)+7, PU_STATIC, NULL));

 	strcpy(filename, model->filename);

@@ -441,8 +448,8 @@ static void md2_loadBlendTexture(md2_t *model)

 	if (model->blendglpatch)
 	{
-		patch = model->blendglpatch;
-		glPatch = (GLPatch_t *)(patch->hardware);
+		patch = static_cast<patch_t *>(model->blendglpatch);
+		glPatch = static_cast<GLPatch_t *>(patch->hardware);
 		if (glPatch)
 			Z_Free(glPatch->mipmap->data);
 	}
@@ -453,17 +460,17 @@ static void md2_loadBlendTexture(md2_t *model)
 		Patch_AllocateHardwarePatch(patch);

 	if (glPatch == NULL)
-		glPatch = (GLPatch_t *)(patch->hardware);
+		glPatch = static_cast<GLPatch_t *>(patch->hardware);

 	if (!glPatch->mipmap->downloaded && !glPatch->mipmap->data)
 	{
 		int w = 0, h = 0;
 #ifdef HAVE_PNG
 		glPatch->mipmap->format = PNG_Load(filename, &w, &h, glPatch);
-		if (glPatch->mipmap->format == 0)
+		if (glPatch->mipmap->format == GL_TEXFMT_NULL)
 #endif
 		glPatch->mipmap->format = PCX_Load(filename, &w, &h, glPatch);
-		if (glPatch->mipmap->format == 0)
+		if (glPatch->mipmap->format == GL_TEXFMT_NULL)
 		{
 			model->noblendfile = true; // mark it so its not searched for again repeatedly
 			Z_Free(filename);
@@ -532,11 +539,11 @@ void HWR_InitMD2(void)

 	// read the mdls.dat file
 	//Filename checking fixed ~Monster Iestyn and Golden
-	f = fopen(va("%s"PATHSEP"%s", srb2home, "mdls.dat"), "rt");
+	f = fopen(va("%s" PATHSEP "%s", srb2home, "mdls.dat"), "rt");

 	if (!f)
 	{
-		f = fopen(va("%s"PATHSEP"%s", srb2path, "mdls.dat"), "rt");
+		f = fopen(va("%s" PATHSEP "%s", srb2path, "mdls.dat"), "rt");
 		if (!f)
 		{
 			CONS_Printf("%s %s\n", M_GetText("Error while loading mdls.dat:"), strerror(errno));
@@ -579,7 +586,7 @@ md2found:
 	fclose(f);
 }

-void HWR_AddPlayerMD2(INT32 skin, boolean local) // For MD2's that were added after startup
+void HWR_AddPlayerMD2(int skin, boolean local) // For MD2's that were added after startup
 {
 	FILE *f;
 	char name[20], filename[32];
@@ -593,11 +600,11 @@ void HWR_AddPlayerMD2(INT32 skin, boolean local) // For MD2's that were added af

 	// read the mdls.dat file
 	//Filename checking fixed ~Monster Iestyn and Golden
-	f = fopen(va("%s"PATHSEP"%s", srb2home, "mdls.dat"), "rt");
+	f = fopen(va("%s" PATHSEP "%s", srb2home, "mdls.dat"), "rt");

 	if (!f)
 	{
-		f = fopen(va("%s"PATHSEP"%s", srb2path, "mdls.dat"), "rt");
+		f = fopen(va("%s" PATHSEP "%s", srb2path, "mdls.dat"), "rt");
 		if (!f)
 		{
 			CONS_Printf("%s %s\n", M_GetText("Error while loading mdls.dat:"), strerror(errno));
@@ -645,11 +652,11 @@ void HWR_AddSpriteMD2(size_t spritenum) // For MD2s that were added after startu

 	// Read the md2.dat file
 	//Filename checking fixed ~Monster Iestyn and Golden
-	f = fopen(va("%s"PATHSEP"%s", srb2home, "mdls.dat"), "rt");
+	f = fopen(va("%s" PATHSEP "%s", srb2home, "mdls.dat"), "rt");

 	if (!f)
 	{
-		f = fopen(va("%s"PATHSEP"%s", srb2path, "mdls.dat"), "rt");
+		f = fopen(va("%s" PATHSEP "%s", srb2path, "mdls.dat"), "rt");

 		if (!f)
 		{
@@ -689,8 +696,8 @@ spritemd2found:

 static void HWR_CreateBlendedTexture(patch_t *gpatch, patch_t *blendgpatch, GLMipmap_t *glMipmap, INT32 skinnum, skincolors_t color)
 {
-	GLPatch_t *hwrPatch = gpatch->hardware;
-	GLPatch_t *hwrBlendPatch = blendgpatch->hardware;
+	GLPatch_t *hwrPatch = static_cast<GLPatch_t *>(gpatch->hardware);
+	GLPatch_t *hwrBlendPatch = static_cast<GLPatch_t *>(blendgpatch->hardware);
 	UINT16 w = gpatch->width, h = gpatch->height;
 	UINT32 size = w*h;
 	RGBA_t *image, *blendimage, *cur, blendcolor;
@@ -722,11 +729,11 @@ static void HWR_CreateBlendedTexture(patch_t *gpatch, patch_t *blendgpatch, GLMi
 		glMipmap->data = NULL;
 	}

-	cur = Z_Malloc(size*4, PU_HWRMODELTEXTURE, &glMipmap->data);
+	cur = static_cast<RGBA_t *>(Z_Malloc(size*4, PU_HWRMODELTEXTURE, &glMipmap->data));
 	memset(cur, 0x00, size*4);

-	image = hwrPatch->mipmap->data;
-	blendimage = hwrBlendPatch->mipmap->data;
+	image = static_cast<RGBA_t *>(hwrPatch->mipmap->data);
+	blendimage = static_cast<RGBA_t *>(hwrBlendPatch->mipmap->data);

 	// TC_METALSONIC includes an actual skincolor translation, on top of its flashing.
 	if (skinnum == TC_METALSONIC)
@@ -972,15 +979,15 @@ static void HWR_CreateBlendedTexture(patch_t *gpatch, patch_t *blendgpatch, GLMi
 					colorbright = 1; // no dividing by 0 please

 				tempcolor = (brightness * blendcolor.s.red) / colorbright;
-				tempcolor = min(255, tempcolor);
+				tempcolor = std::min<UINT32>(255, tempcolor);
 				cur->s.red = (UINT8)tempcolor;

 				tempcolor = (brightness * blendcolor.s.green) / colorbright;
-				tempcolor = min(255, tempcolor);
+				tempcolor = std::min<UINT32>(255, tempcolor);
 				cur->s.green = (UINT8)tempcolor;

 				tempcolor = (brightness * blendcolor.s.blue) / colorbright;
-				tempcolor = min(255, tempcolor);
+				tempcolor = std::min<UINT32>(255, tempcolor);
 				cur->s.blue = (UINT8)tempcolor;
 				cur->s.alpha = image->s.alpha;
 			}
@@ -990,15 +997,15 @@ static void HWR_CreateBlendedTexture(patch_t *gpatch, patch_t *blendgpatch, GLMi
 				INT32 tempcolor;

 				tempcolor = ((image->s.red * (255-blendimage->s.alpha)) / 255) + ((blendcolor.s.red * blendimage->s.alpha) / 255);
-				tempcolor = min(255, tempcolor);
+				tempcolor = std::min<UINT32>(255, tempcolor);
 				cur->s.red = (UINT8)tempcolor;

 				tempcolor = ((image->s.green * (255-blendimage->s.alpha)) / 255) + ((blendcolor.s.green * blendimage->s.alpha) / 255);
-				tempcolor = min(255, tempcolor);
+				tempcolor = std::min<UINT32>(255, tempcolor);
 				cur->s.green = (UINT8)tempcolor;

 				tempcolor = ((image->s.blue * (255-blendimage->s.alpha)) / 255) + ((blendcolor.s.blue * blendimage->s.alpha) / 255);
-				tempcolor = min(255, tempcolor);
+				tempcolor = std::min<UINT32>(255, tempcolor);
 				cur->s.blue = (UINT8)tempcolor;
 				cur->s.alpha = image->s.alpha;
 			}
@@ -1034,22 +1041,30 @@ skippixel:
 static void HWR_GetBlendedTexture(patch_t *patch, patch_t *blendgpatch, INT32 skinnum, const UINT8 *colormap, skincolors_t color)
 {
 	// mostly copied from HWR_GetMappedPatch, hence the similarities and comment
-	GLPatch_t *glPatch = patch->hardware;
-	GLMipmap_t *glMipmap, *newMipmap;
+	GLPatch_t *glPatch = static_cast<GLPatch_t *>(patch->hardware);
+	GLMipmap_t *newMipmap;

-
-	if (blendgpatch == NULL || colormap == colormaps || colormap == NULL)
+	if (blendgpatch == NULL || colormap == colormaps
+	 || colormap == NULL || colormap == (const UINT8*)(COLORMAP_REMAPOFFSET))
 	{
 		// Don't do any blending
 		GL_SetTexture(glPatch->mipmap);
 		return;
 	}

-	// search for the Mipmap
-	// skip the first (no colormap translated)
-	for (glMipmap = glPatch->mipmap; glMipmap->nextcolormap; )
+	// gotta make our map if theres none
+	if (!glPatch->mipmap->nextcolormap)
 	{
-		glMipmap = glMipmap->nextcolormap;
+		glPatch->mipmap->nextcolormap = new ColorMipMap();
+	}
+
+	// search for the Mipmap
+	auto& map = glPatch->mipmap->nextcolormap->map;
+	auto it = map.find(colormap);
+
+	if (it != map.end())
+	{
+		GLMipmap_t *glMipmap = it->second;

 		if (glMipmap->colormap && glMipmap->colormap->source == colormap)
 		{
@@ -1077,12 +1092,14 @@ static void HWR_GetBlendedTexture(patch_t *patch, patch_t *blendgpatch, INT32 sk
 	//              (it have a liste of mipmap)
 	//    this malloc is cleared in HWR_FreeTextureCache
 	//    (...) unfortunately z_malloc fragment alot the memory :(so malloc is better
-	newMipmap = calloc(1, sizeof (*newMipmap));
+	newMipmap = static_cast<GLMipmap_t *>(calloc(1, sizeof(*newMipmap)));
 	if (newMipmap == NULL)
 		I_Error("%s: Out of memory", "HWR_GetBlendedTexture");
-	glMipmap->nextcolormap = newMipmap;

-	newMipmap->colormap = Z_Calloc(sizeof(*newMipmap->colormap), PU_HWRPATCHCOLMIPMAP, NULL);
+	// add to nextcolormap map
+	map[colormap] = newMipmap;
+
+	newMipmap->colormap = static_cast<GLColormap_t *>(Z_Calloc(sizeof(*newMipmap->colormap), PU_HWRPATCHCOLMIPMAP, NULL));
 	newMipmap->colormap->source = colormap;
 	memcpy(newMipmap->colormap->data, colormap, 256 * sizeof(UINT8));

@@ -1179,7 +1196,7 @@ void HWR_DrawMD2(gl_vissprite_t *spr)
 		else
 			blendmode = spr->mobj->blendmode;

-		blendmode = min(AST_MODULATE, blendmode);
+		blendmode = std::min<INT32>(AST_MODULATE, blendmode);

 		if (spr->mobj->flags2 & MF2_SHADOW)
 		{
@@ -1268,7 +1285,7 @@ void HWR_DrawMD2(gl_vissprite_t *spr)
 		}

 		//Hurdler: arf, I don't like that implementation at all... too much crappy
-		gpatch = md2->glpatch;
+		gpatch = static_cast<patch_t *>(md2->glpatch);
 		if (gpatch)
 			hwrPatch = ((GLPatch_t *)gpatch->hardware);

@@ -1277,12 +1294,12 @@ void HWR_DrawMD2(gl_vissprite_t *spr)
 			md2_loadTexture(md2);

 		// Load it again, because it isn't being loaded into gpatch after md2_loadtexture...
-		gpatch = md2->glpatch;
+		gpatch = static_cast<patch_t *>(md2->glpatch);
 		if (gpatch)
 			hwrPatch = ((GLPatch_t *)gpatch->hardware);

 		// Load blend texture
-		blendgpatch = md2->blendglpatch;
+		blendgpatch = static_cast<patch_t *>(md2->blendglpatch);
 		if (blendgpatch)
 			hwrBlendPatch = ((GLPatch_t *)blendgpatch->hardware);

@@ -1292,7 +1309,7 @@ void HWR_DrawMD2(gl_vissprite_t *spr)
 			md2_loadBlendTexture(md2);

 		// Load it again, because it isn't being loaded into blendgpatch after md2_loadblendtexture...
-		blendgpatch = md2->blendglpatch;
+		blendgpatch = static_cast<patch_t *>(md2->blendglpatch);
 		if (blendgpatch)
 			hwrBlendPatch = ((GLPatch_t *)blendgpatch->hardware);

@@ -1508,7 +1525,7 @@ void HWR_Draw2DModel(md2_t *md2, INT32 x, INT32 y, INT32 skinnum, skincolors_t c
 	else
 		frame = 0;

-	gpatch = (patch_t *)(md2->glpatch);
+	gpatch = static_cast<patch_t *>(md2->glpatch);
 	if (gpatch)
 		hwrPatch = ((GLPatch_t *)gpatch->hardware);

@@ -1516,11 +1533,11 @@ void HWR_Draw2DModel(md2_t *md2, INT32 x, INT32 y, INT32 skinnum, skincolors_t c
 	    ((!hwrPatch->mipmap->format || !hwrPatch->mipmap->downloaded) && !md2->notexturefile))
 		md2_loadTexture(md2);

-	gpatch = (patch_t*)(md2->glpatch);
+	gpatch = static_cast<patch_t *>(md2->glpatch);
 	if (gpatch)
 		hwrPatch = ((GLPatch_t *)gpatch->hardware);

-	blendgpatch = (patch_t*)(md2->blendglpatch);
+	blendgpatch = static_cast<patch_t *>(md2->blendglpatch);
 	if (blendgpatch)
 		hwrBlendPatch = ((GLPatch_t *)blendgpatch->hardware);

@@ -1529,7 +1546,7 @@ void HWR_Draw2DModel(md2_t *md2, INT32 x, INT32 y, INT32 skinnum, skincolors_t c
 		((!hwrBlendPatch->mipmap->format || !hwrBlendPatch->mipmap->downloaded) && !md2->noblendfile)))
 		md2_loadBlendTexture(md2);

-	blendgpatch = (patch_t*)(md2->blendglpatch);
+	blendgpatch = static_cast<patch_t *>(md2->blendglpatch);
 	if (blendgpatch)
 		hwrBlendPatch = ((GLPatch_t *)blendgpatch->hardware);

@@ -3591,30 +3591,22 @@ void GL_RenderVhsEffect(fixed_t upbary, fixed_t downbary, UINT8 updistort, UINT8
 		 1.0f, -1.0f, 1.0f
 	};

+	xfix = 1/((float)screen_texsizew/(float)screen_width);
+	yfix = 1/((float)screen_texsizeh/(float)screen_height);
+
 	const GLfloat scrwf = (float)screen_width;
 	const GLfloat scrwh = (float)screen_height;

-	xfix = 1/((float)screen_texsizew/scrwf);
-	yfix = 1/((float)screen_texsizeh/scrwh);
-
-	GL_SetBlend(PF_Modulated|PF_Translucent|PF_NoDepthTest);
-
 	// Slight fuzziness
 	GL_MakeScreenTexture(HWD_SCREENTEXTURE_VHS);
+	GL_SetBlend(PF_Modulated|PF_Translucent|PF_NoDepthTest);
 	pglBindTexture(GL_TEXTURE_2D, screenTextures[HWD_SCREENTEXTURE_VHS]);

-	uint32_t r = rand();
+	const float stride = 2.f/scrwh;

-	const float ystep = 2.f/scrwh * (float)vid.udup/4.f;
-
-	for (i = 0; i < 1; i += ystep)
+	for (i = 0; i < 1; i += stride)
 	{
-		// avoid calling rand thousands of times
-		r ^= r >> 13;
-		r ^= r >> 11;
-		r ^= r << 21;
-
-		fix[2] = (float)(r & 127) / -22000.f * xfix;
+		fix[2] = (float)(rand() % 128) / -22000.f * xfix;
 		fix[0] = fix[2];
 		fix[6] = fix[0] + xfix;
 		fix[4] = fix[2] + xfix;
@@ -3632,8 +3624,8 @@ void GL_RenderVhsEffect(fixed_t upbary, fixed_t downbary, UINT8 updistort, UINT8
 	}

 	// Upward bar
-	GL_MakeScreenTexture(HWD_SCREENTEXTURE_VHS);
-	pglBindTexture(GL_TEXTURE_2D, screenTextures[HWD_SCREENTEXTURE_VHS]);
+	//GL_MakeScreenTexture(HWD_SCREENTEXTURE_VHS);
+	//pglBindTexture(GL_TEXTURE_2D, screenTextures[HWD_SCREENTEXTURE_VHS]);

 	color[0] = color[1] = color[2] = 190;
 	color[3] = 250;
@@ -3656,14 +3648,13 @@ void GL_RenderVhsEffect(fixed_t upbary, fixed_t downbary, UINT8 updistort, UINT8

 	fix[1] = fix[7] += (fix[3] - fix[7])*2;
 	screenVerts[1] = screenVerts[10] += (screenVerts[4] - screenVerts[1])*2;
-
 	pglTexCoordPointer(2, GL_FLOAT, 0, fix);
 	pglVertexPointer(3, GL_FLOAT, 0, screenVerts);
 	pglDrawArrays(GL_TRIANGLE_FAN, 0, 4);

 	// Downward bar
-	GL_MakeScreenTexture(HWD_SCREENTEXTURE_VHS);
-	pglBindTexture(GL_TEXTURE_2D, screenTextures[HWD_SCREENTEXTURE_VHS]);
+	//GL_MakeScreenTexture(HWD_SCREENTEXTURE_VHS);
+	//pglBindTexture(GL_TEXTURE_2D, screenTextures[HWD_SCREENTEXTURE_VHS]);

 	fix[0] = 0.0f;
 	fix[6] = xfix;
@@ -3682,7 +3673,6 @@ void GL_RenderVhsEffect(fixed_t upbary, fixed_t downbary, UINT8 updistort, UINT8

 	fix[1] = fix[7] += (fix[3] - fix[7])*2;
 	screenVerts[1] = screenVerts[10] += (screenVerts[4] - screenVerts[1])*2;
-
 	pglTexCoordPointer(2, GL_FLOAT, 0, fix);
 	pglVertexPointer(3, GL_FLOAT, 0, screenVerts);
 	pglDrawArrays(GL_TRIANGLE_FAN, 0, 4);
@@ -3722,7 +3712,7 @@ void GL_DrawScreenFinalTexture(int tex, INT32 width, INT32 height, boolean usesh
 {
 	float xfix, yfix;
 	float origaspect, newaspect;
-	float xoff = 1.0f, yoff = 1.0f; // xoffset and yoffset for the polygon to have black bars around the screen
+	float xoff = 1, yoff = 1; // xoffset and yoffset for the polygon to have black bars around the screen

 	static float off[12] =
 	{
@@ -3745,19 +3735,19 @@ void GL_DrawScreenFinalTexture(int tex, INT32 width, INT32 height, boolean usesh
 	if (origaspect < newaspect)
 	{
 		xoff = origaspect / newaspect;
-		yoff = 1.0f;
+		yoff = 1;
 	}
 	else if (origaspect > newaspect)
 	{
-		xoff = 1.0f;
+		xoff = 1;
 		yoff = newaspect / origaspect;
 	}

 	// float off[12];
 	off[0] = off[3]  = -xoff;
 	off[1] = off[10] = -yoff;
-	off[4] = off[7]  =  yoff;
-	off[6] = off[9]  =  xoff;
+	off[4] = off[7]  = yoff;
+	off[6] = off[9]  = xoff;

 	// float fix[8];
 	fix[3] = fix[5] = yfix;
@@ -1484,7 +1484,6 @@ static char *CHAT_WordWrap(INT32 x, INT32 w, INT32 option, const char *string)
 			x = 0;
 		}
 	}
-
 	return newstring;
 }

@@ -1523,7 +1522,7 @@ static void HU_drawMiniChat(void)
 		emote_t *emote = NULL;
 		int emotelen = 0;

-		while (msg[j]) // iterate through msg
+		while(msg[j]) // iterate through msg
 		{
 			if (msg[j] < HU_FONTSTART) // don't draw
 			{
@@ -1555,17 +1554,14 @@ static void HU_drawMiniChat(void)
 			{
 				j++;
 			}
-
 			prev_linereturn = false;
 			dx += charwidth;
-
 			if (dx >= boxw)
 			{
 				dx = 0;
 				linescount += 1;
 			}
 		}
-
 		dy = 0;
 		dx = 0;
 		msglines += linescount+1;
@@ -1602,7 +1598,7 @@ static void HU_drawMiniChat(void)
 		emote_t *emote = NULL;
 		int emotelen = 0;

-		while (msg[j]) // iterate through msg
+		while(msg[j]) // iterate through msg
 		{
 			if (msg[j] < HU_FONTSTART) // don't draw
 			{
@@ -1647,14 +1643,12 @@ static void HU_drawMiniChat(void)

 			dx += charwidth;
 			prev_linereturn = false;
-
 			if (dx >= boxw)
 			{
 				dx = 0;
 				dy += charheight;
 			}
 		}
-
 		dy += charheight;
 		dx = 0;
 		if (msg)
@@ -1710,7 +1704,7 @@ static void HU_drawChatLog(INT32 offset)

 	V_DrawFillConsoleMap(chatx, chat_topy, boxw, boxh*charheight +2, 239|V_SNAPTOBOTTOM|V_SNAPTOLEFT); // log box

-	for (i = 0; i < chat_nummsg_log; i++) // iterate through our chatlog
+	for (i=0; i<chat_nummsg_log; i++) // iterate through our chatlog
 	{
 		INT32 clrflag = 0;
 		INT32 j = 0;
@@ -1719,7 +1713,7 @@ static void HU_drawChatLog(INT32 offset)
 		emote_t *emote = NULL;
 		int emotelen = 0;

-		while (msg[j]) // iterate through msg
+		while(msg[j]) // iterate through msg
 		{
 			if (msg[j] < HU_FONTSTART) // don't draw
 			{
@@ -1764,7 +1758,6 @@ static void HU_drawChatLog(INT32 offset)
 				dy += charheight;
 			}
 		}
-
 		dy += charheight;
 		dx = 0;
 		if (msg)
@@ -1293,7 +1293,6 @@ static int lib_pPlayRinglossSound(lua_State *L)
 	player_t *player = NULL;
 	mobj_t *damager = NULL;
 	NOHUD
-	LUA_UsageWarning(L, "P_PlayRinglossSound: using this function from lua might cause desynchs, consider using S_StartSound(origin, sfx_khurt1 + P_RandomKey(2)) as workaround");
 	if (!source)
 		return LUA_ErrInvalid(L, "mobj_t");
 	if (!lua_isnone(L, 2) && lua_isuserdata(L, 2))
@@ -25,7 +25,7 @@
 #include "lua_hook.h"	// cmd errors

 boolean LUA_CallAction(enum actionnum actionnum, mobj_t *actor);
-state_t *astate = NULL;
+state_t *astate;

 boolean actionsoverridden[NUMACTIONS] = {false};

@@ -45,20 +45,20 @@ int hook_defrosting = 0;

 // List of internal libraries to load from SRB2
 static lua_CFunction liblist[] = {
-	LUA_EnumLib, 		// global metatable for enums
-	LUA_SOCLib, 		// A_Action functions, freeslot
-	LUA_BaseLib, 		// string concatination by +, CONS_Printf, p_local.h stuff (P_InstaThrust, P_Move), etc.
-	LUA_MathLib, 		// fixed_t and angle_t math functions
-	LUA_HookLib, 		// hookAdd and hook-calling functions
-	LUA_ConsoleLib, 	// console command/variable functions and structs
-	LUA_InfoLib, 		// info.h stuff: mobjinfo_t, mobjinfo[], state_t, states[]
-	LUA_MobjLib, 		// mobj_t, mapthing_t
-	LUA_PlayerLib, 		// player_t
-	LUA_SkinLib, 		// skin_t, skins[]
-	LUA_ThinkerLib, 	// thinker_t
-	LUA_MapLib, 		// line_t, side_t, sector_t, subsector_t
-	LUA_BlockmapLib, 	// blockmap stuff
-	LUA_HudLib, 		// HUD stuff
+	LUA_EnumLib, // global metatable for enums
+	LUA_SOCLib, // A_Action functions, freeslot
+	LUA_BaseLib, // string concatination by +, CONS_Printf, p_local.h stuff (P_InstaThrust, P_Move), etc.
+	LUA_MathLib, // fixed_t and angle_t math functions
+	LUA_HookLib, // hookAdd and hook-calling functions
+	LUA_ConsoleLib, // console command/variable functions and structs
+	LUA_InfoLib, // info.h stuff: mobjinfo_t, mobjinfo[], state_t, states[]
+	LUA_MobjLib, // mobj_t, mapthing_t
+	LUA_PlayerLib, // player_t
+	LUA_SkinLib, // skin_t, skins[]
+	LUA_ThinkerLib, // thinker_t
+	LUA_MapLib, // line_t, side_t, sector_t, subsector_t
+	LUA_BlockmapLib, // blockmap stuff
+	LUA_HudLib, // HUD stuff
 	NULL
 };

@@ -66,8 +66,12 @@ static lua_CFunction liblist[] = {
 static void *LUA_Alloc(void *ud, void *ptr, size_t osize, size_t nsize)
 {
 	(void)ud;
-	(void)osize;
-	return Z_Realloc(ptr, nsize, PU_LUA, NULL);
+	if (nsize == 0) {
+		if (osize != 0)
+			Z_Free(ptr);
+		return NULL;
+	} else
+		return Z_Realloc(ptr, nsize, PU_LUA, NULL);
 }

 // Panic function Lua calls when there's an unprotected error.
@@ -209,8 +213,7 @@ void LUA_ClearState(void)
 	lua_setfield(L, LUA_REGISTRYINDEX, LREG_VALID);

 	// open srb2 libraries
-	for (i = 0; liblist[i]; i++)
-	{
+	for(i = 0; liblist[i]; i++) {
 		lua_pushcfunction(L, liblist[i]);
 		lua_call(L, 0, 0);
 	}
@@ -301,7 +301,7 @@ void Command_CheatNoTarget_f(void)
 void Command_Scale_f(void)
 {
 	const double scaled = atof(COM_Argv(1));
-	fixed_t scale = DoubleToFixed(scaled);
+	fixed_t scale = FLOAT_TO_FIXED(scaled);

 	REQUIRE_DEVMODE;
 	REQUIRE_INLEVEL;
@@ -12,14 +12,14 @@
 #ifndef __M_EMOTES__
 #define __M_EMOTES__

-#include "doomdef.h"
-#include "m_fixed.h"
-#include "command.h"
-
 #ifdef __cplusplus
 extern "C" {
 #endif

+#include "doomdef.h"
+#include "m_fixed.h"
+#include "command.h"
+
 extern consvar_t cv_emotes;

 #define MAXEMOTENAME 32
@@ -20,7 +20,6 @@ extern "C" {
 #endif

 #include "doomtype.h"
-
 #ifdef __GNUC__
 #include <stdlib.h>
 #endif
@@ -72,14 +71,6 @@ FUNCMATH FUNCINLINE static ATTRINLINE fixed_t DoubleToFixed(double f)
 #define FIXED_TO_FLOAT(x) FixedToFloat(x) // (((float)(x)) / ((float)FRACUNIT))
 #define FLOAT_TO_FIXED(f) FloatToFixed(f) // (fixed_t)((f) * ((float)FRACUNIT))

-FUNCMATH FUNCINLINE static ATTRINLINE fixed_t FixedClamp(INT64 val)
-{
-// stoopid includes
-#define FCLAMP(x, y, z) ((x) < (y) ? (y) : ((x) > (z) ? (z) : (x)))
-	return (fixed_t)(FCLAMP(val, (INT64)INT32_MIN, (INT64)INT32_MAX));
-#undef FCLAMP
-}
-
 /**	\brief	The FixedMul function

 	\param	a	fixed_t number
@@ -274,6 +265,35 @@ FUNCMATH FUNCINLINE static ATTRINLINE fixed_t FixedRound(fixed_t x)
 	return INT32_MAX;
 }

+/**	\brief	The xs_CRoundToInt function
+
+	\param	val	double number
+
+	\return Round toward nearest, but ties round toward even
+*/
+#if defined(SRB2_BIG_ENDIAN)
+	#define _xs_iexp_				0
+	#define _xs_iman_				1
+#else
+	#define _xs_iexp_				1       //intel is little endian
+	#define _xs_iman_				0
+#endif //BigEndian_
+
+typedef double real64;
+
+typedef union _xs_doubleints
+{
+	real64 val;
+	unsigned ival[2];
+} _xs_doubleints;
+
+FUNCMATH FUNCINLINE static ATTRINLINE int xs_CRoundToInt(real64 val)
+{
+	_xs_doubleints uval;
+	uval.val = val + 6755399441055744.0;
+	return uval.ival[_xs_iman_];
+}
+
 typedef struct
 {
 	fixed_t x;
@@ -4719,7 +4719,7 @@ static void M_DrawReplayHut(void)
 	if (y > scaledviewheight-80)
 	{
 		V_DrawFill(BASEVIDWIDTH-4, 75, 4, scaledviewheight-80, V_SNAPTOTOP|V_SNAPTORIGHT|239);
-		V_DrawFill(BASEVIDWIDTH-3, 76 + (scaledviewheight-80) * replayhutmenuy / y, 2, max((((scaledviewheight-80) * (scaledviewheight-80))-1) / y - 1, 1), V_SNAPTOTOP|V_SNAPTORIGHT|229);
+		V_DrawFill(BASEVIDWIDTH-3, 76 + (scaledviewheight-80) * replayhutmenuy / y, 2, (((scaledviewheight-80) * (scaledviewheight-80))-1) / y - 1, V_SNAPTOTOP|V_SNAPTORIGHT|229);
 	}

 	// Draw the cursor
@@ -1205,10 +1205,6 @@ static menuitem_t OP_FocusOptionsMenu[] =
 	{IT_STRING|IT_CVAR,	NULL, "Show \"FOCUS LOST\"",						&cv_showfocuslost,		   100},

 	{IT_STRING|IT_CVAR,	NULL, "Visible Mouse",								&cv_mousevisible,	       120},
-
-	{IT_STRING|IT_CVAR,	NULL, "Gamepad LED Color While Unfocused ",			&cv_gamepadledifunfocused, 	140},
-	{IT_STRING|IT_CVAR,	NULL, "Gamepad Rumble While Unfocused",				&cv_rumbleifunfocused, 	    150},
-
 };

 static const char* OP_FocusOptionsTooltips[] =
@@ -1220,8 +1216,6 @@ static const char* OP_FocusOptionsTooltips[] =
 	"Set manual framerate cap while the game is unfocused.",
 	"Should the FOCUS LOST window appear\n while the game is unfocused?",
 	"Displays the mouse cursor while the game is in focus.",
-	"Should gamepad LED indicator change color when unfocused?",
-	"Should gamepad rumble apply when unfocused?",
 };

 static menuitem_t OP_DataOptionsMenu[] =
@@ -540,7 +540,7 @@ static boolean M_BackupConfig(const char *filename)
 void M_SaveConfig(const char *filename)
 {
 	FILE *f;
-	CLEANUP(Z_Pfree) char *filepath = NULL;
+	char *filepath;

 	// make sure not to write back the config until it's been correctly loaded
 	if (!loaded_config)
@@ -558,7 +558,7 @@ void M_SaveConfig(const char *filename)
 		// append srb2home to beginning of filename
 		// but check if srb2home isn't already there, first
 		if (!strstr(filename, srb2home))
-			filepath = Z_StrDup(va(pandf, srb2home, filename));
+			filepath = va(pandf,srb2home, filename);
 		else
 			filepath = Z_StrDup(filename);

@@ -14,6 +14,10 @@
 #ifndef __P_LOCAL__
 #define __P_LOCAL__

+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #include "command.h"
 #include "d_player.h"
 #include "d_think.h"
@@ -24,10 +28,6 @@
 #include "p_maputl.h"
 #include "doomstat.h" // MAXSPLITSCREENPLAYERS

-#ifdef __cplusplus
-extern "C" {
-#endif
-
 #define FLOATSPEED (FRACUNIT*4)

 //#define VIEWHEIGHTS "41"
@@ -20,10 +20,6 @@
 #pragma interface
 #endif

-#ifdef __cplusplus
-extern "C" {
-#endif
-
 extern tic_t leveltime;

 // Called by G_Ticker. Carries out all thinking of enemies and players.
@@ -42,10 +38,6 @@ mobj_t *P_SetTarget2(mobj_t **mo, mobj_t *target
 #endif
 );

-#ifdef __cplusplus
-}
-#endif
-
 #ifdef PARANOIA
 #define P_SetTarget(...) P_SetTarget2(__VA_ARGS__, __FILE__, __LINE__)
 #else
@@ -15,16 +15,16 @@
 #ifndef __R_FPS_H__
 #define __R_FPS_H__

+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #include "m_fixed.h"
 #include "p_local.h"
 #include "r_state.h"
 #include "r_things.h"
 #include "m_perfstats.h"

-#ifdef __cplusplus
-extern "C" {
-#endif
-
 extern consvar_t cv_fpscap, cv_fpscapbg;

 extern ps_metric_t ps_interp_frac;
@@ -519,10 +519,10 @@ void R_GetRenderBlockMapDimensions(fixed_t drawdist, INT32 *xl, INT32 *xh, INT32
 	const fixed_t vyright = viewy + FixedMul(drawdist, FSIN(right));

 	// Try to narrow the search to within only the field of view
-	*xl = (unsigned)(FixedClamp((INT64)std::min(viewx, std::min(vxleft, vxright)) - bmaporgx))>>MAPBLOCKSHIFT;
-	*xh = (unsigned)(FixedClamp((INT64)std::max(viewx, std::max(vxleft, vxright)) - bmaporgx))>>MAPBLOCKSHIFT;
-	*yl = (unsigned)(FixedClamp((INT64)std::min(viewy, std::min(vyleft, vyright)) - bmaporgy))>>MAPBLOCKSHIFT;
-	*yh = (unsigned)(FixedClamp((INT64)std::max(viewy, std::max(vyleft, vyright)) - bmaporgy))>>MAPBLOCKSHIFT;
+	*xl = (unsigned)(std::min(viewx, std::min(vxleft, vxright)) - bmaporgx)>>MAPBLOCKSHIFT;
+	*xh = (unsigned)(std::max(viewx, std::max(vxleft, vxright)) - bmaporgx)>>MAPBLOCKSHIFT;
+	*yl = (unsigned)(std::min(viewy, std::min(vyleft, vyright)) - bmaporgy)>>MAPBLOCKSHIFT;
+	*yh = (unsigned)(std::max(viewy, std::max(vyleft, vyright)) - bmaporgy)>>MAPBLOCKSHIFT;

 	if (*xh >= bmapwidth)
 		*xh = bmapwidth - 1;
@@ -1018,8 +1018,8 @@ static void R_InitViewMapping(void)

 		for (INT32 i = 0; i < j; i++)
 		{
-			fixed_t dy = abs(i - viewheight*8) << FRACBITS;
-			dy = FixedMul(dy, fovtan);
+			fixed_t dy = (i - viewheight*8)<<FRACBITS;
+			dy = FixedMul(abs(dy), fovtan);
 			yslopetab[i] = FixedDiv(centerx*FRACUNIT, dy);
 		}
 	}
@@ -14,14 +14,14 @@
 #ifndef __R_MAIN__
 #define __R_MAIN__

-#include "d_player.h"
-#include "r_data.h"
-#include "m_perfstats.h"
-
 #ifdef __cplusplus
 extern "C" {
 #endif

+#include "d_player.h"
+#include "r_data.h"
+#include "m_perfstats.h"
+
 //
 // POV related.
 //
@@ -152,8 +152,8 @@ subsector_t *R_IsPointInSubsector(fixed_t x, fixed_t y);

 FUNCMATH FUNCINLINE static ATTRINLINE fixed_t R_QuickDist(fixed_t x1, fixed_t y1, fixed_t x, fixed_t y)
 {
-	const fixed_t absx = FixedClamp(labs((INT64)x - (INT64)x1));
-	const fixed_t absy = FixedClamp(labs((INT64)y - (INT64)y1));
+	const fixed_t absx = abs(x - x1);
+	const fixed_t absy = abs(y - y1);
 #ifdef __cplusplus
 	return std::max<fixed_t>(absx, absy);
 #else
@@ -57,11 +57,8 @@ visffloor_t visffloor[MAXFFLOORS] = {};
 INT32 numffloors = 0;

 //SoM: 3/23/2000: Boom visplane hashing routine.
-constexpr unsigned int visplane_hash(const unsigned int picnum, const unsigned int lightlevel,
-									 const unsigned int height)
-{
-	return ((picnum * 3) + lightlevel + (height * 7)) & VISPLANEHASHMASK;
-}
+#define visplane_hash(picnum,lightlevel,height) \
+  ((unsigned)((picnum)*3+(lightlevel)+(height)*7) & VISPLANEHASHMASK)

 //
 // Clip values are the solid pixel bounding the range.
@@ -139,7 +136,7 @@ void R_AllocPlaneMemory(void)
 	}

 	yslopetab = static_cast<fixed_t*>(Z_Realloc(yslopetab, sizeof(*yslopetab) * (viewheight * 16), PU_STATIC, NULL));
-	spanstart = static_cast<INT32*>(Z_Realloc(spanstart, sizeof(*spanstart) * viewheight, PU_STATIC, NULL));
+	spanstart = static_cast<fixed_t*>(Z_Realloc(spanstart, sizeof(*spanstart) * viewheight, PU_STATIC, NULL));
 }

 //
@@ -228,8 +225,8 @@ static void R_MapPlane(drawspandata_t *ds, spandrawfunc_t *localspanfunc, INT32
 	// to step from those to the proper texture coordinate to start drawing at.
 	// That way, the texture coordinate is always calculated by its position
 	// on the screen and not by its position relative to the edge of the visplane.
-	ds->xfrac = FixedClamp((INT64)ds->xoffs + (INT64)FixedMul(planecos, distance) + ((INT64)x1 - (INT64)centerx) * (INT64)ds->xstep);
-	ds->yfrac = FixedClamp((INT64)ds->yoffs - (INT64)FixedMul(planesin, distance) + ((INT64)x1 - (INT64)centerx) * (INT64)ds->ystep);
+	ds->xfrac = ds->xoffs + FixedMul(planecos, distance) + (x1 - centerx) * ds->xstep;
+	ds->yfrac = ds->yoffs - FixedMul(planesin, distance) + (x1 - centerx) * ds->ystep;

 	if (ds->planeripple.active)
 	{
@@ -454,7 +451,7 @@ visplane_t *R_FindPlane(fixed_t height, INT32 picnum, INT32 lightlevel,
 			}
 		}

-		hash = visplane_hash(picnum, lightlevel, height >> FRACBITS);
+		hash = visplane_hash(picnum, lightlevel, height);

 		for (check = visplanes[hash]; check; check = check->next)
 		{
@@ -565,7 +562,7 @@ visplane_t *R_CheckPlane(visplane_t *pl, INT32 start, INT32 stop)
 		}
 		else
 		{
-			unsigned hash = visplane_hash(pl->picnum, pl->lightlevel, pl->height >> FRACBITS);
+			unsigned hash = visplane_hash(pl->picnum, pl->lightlevel, pl->height);
 			new_pl = new_visplane(hash);
 		}

@@ -923,12 +920,12 @@ static void R_SetSlopePlane(drawspandata_t* ds, pslope_t *slope, fixed_t xpos, f

 	// m is the v direction vector in view space
 	ang = ANG2RAD(ANGLE_180 - (angle + plangle));
-	m->x = cosf(ang);
-	m->z = sinf(ang);
+	m->x = cos(ang);
+	m->z = sin(ang);

 	// n is the u direction vector in view space
-	n->x = sinf(ang);
-	n->z = -cosf(ang);
+	n->x = sin(ang);
+	n->z = -cos(ang);

 	plangle >>= ANGLETOFINESHIFT;
 	temp = P_GetSlopeZAt(slope, xpos + FINESINE(plangle), ypos + FINECOSINE(plangle));
@@ -1012,7 +1009,7 @@ void R_DrawSinglePlane(drawspandata_t* ds, visplane_t *pl, boolean allow_paralle
 	levelflat_t *levelflat;
 	void (*mapfunc)(drawspandata_t*, void(*)(drawspandata_t*), INT32, INT32, INT32, boolean) = R_MapPlane;

-	if (!(pl->minx <= pl->maxx))
+	if (pl->minx > pl->maxx)
 		return;

 	// sky flat
@@ -246,6 +246,7 @@ static boolean TrimVisplaneBounds(const visplane_t* plane, INT16* start, INT16*
 	if (!(*start < *end))
 		return true;

+
 	/** Trims a visplane's horizontal gap to match its render area.
 	 *
 	 * Visplanes' minx/maxx may sometimes exceed the area they're
@@ -312,8 +313,8 @@ void Portal_AddSkybox(const visplane_t* plane)
 			y = (viewy - skyboxmo[1]->y) * -mh->skybox_scaley;

 		// Apply transform to account for the skybox viewport angle.
-		portal->viewx += FixedMul(x, FINECOSINE(ang)) - FixedMul(y,  FINESINE(ang));
-		portal->viewy += FixedMul(x,  FINESINE(ang)) + FixedMul(y, FINECOSINE(ang));
+		portal->viewx += FixedMul(x,FINECOSINE(ang)) - FixedMul(y,  FINESINE(ang));
+		portal->viewy += FixedMul(x,  FINESINE(ang)) + FixedMul(y,FINECOSINE(ang));
 	}

 	if (mh->skybox_scalez > 0)
@@ -15,8 +15,6 @@
 #include "r_local.h"
 #include "r_sky.h"

-#include <algorithm>
-
 #include "r_portal.h"
 #include "r_splats.h"
 #include "r_fps.h" // newview
@@ -226,11 +224,10 @@ static void R_RenderMaskedSegLoop(drawcolumndata_t* dc, drawseg_t *drawseg, INT3
 			leftheight  -= viewz;
 			rightheight -= viewz;

-			rlight->height      = FixedClamp((INT64)centeryfrac - FixedMul(leftheight, drawseg->scale1));
-			rlight->heightstep  = FixedClamp((INT64)centeryfrac - FixedMul(rightheight, drawseg->scale2));
-			rlight->heightstep  = FixedClamp((INT64)rlight->heightstep - rlight->height)/(range);
-			rlight->startheight = rlight->height; // keep starting value here to reset for each repeat
-
+			rlight->height         = (centeryfrac) - FixedMul(leftheight, drawseg->scale1);
+			rlight->heightstep     = (centeryfrac) - FixedMul(rightheight, drawseg->scale2);
+			rlight->heightstep     = (rlight->heightstep-rlight->height)/(range);
+			rlight->startheight    = rlight->height; // keep starting value here to reset for each repeat
 			rlight->lightlevel     = *light->lightlevel;
 			rlight->extra_colormap = light->extra_colormap;
 			rlight->flags = static_cast<ffloortype_e>(light->flags);
@@ -342,7 +339,7 @@ static void R_RenderMaskedSegLoop(drawcolumndata_t* dc, drawseg_t *drawseg, INT3
 					for (i = 0; i < dc->numlights; i++)
 					{
 						rlight = &dc->lightlist[i];
-						rlight->height = FixedClamp((INT64)rlight->height + rlight->heightstep);
+						rlight->height += rlight->heightstep;
 					}
 				}

@@ -356,9 +353,9 @@ static void R_RenderMaskedSegLoop(drawcolumndata_t* dc, drawseg_t *drawseg, INT3
 				lighttable_t **xwalllights;

 				sprbotscreen = INT32_MAX;
-				sprtopscreen = windowtop = FixedClamp((INT64)centeryfrac - FixedMul(dc->texturemid, spryscale));
+				sprtopscreen = windowtop = (centeryfrac - FixedMul(dc->texturemid, spryscale));

-				realbot = windowbottom = FixedClamp((INT64)FixedMul(textureheight[texnum], spryscale) + sprtopscreen);
+				realbot = windowbottom = FixedMul(textureheight[texnum], spryscale) + sprtopscreen;
 				dc->iscale = 0xffffffffu / (unsigned)spryscale;

 				// draw the texture
@@ -408,8 +405,7 @@ static void R_RenderMaskedSegLoop(drawcolumndata_t* dc, drawseg_t *drawseg, INT3
 					set_light_vars(i);

 					height = rlight->height;
-
-					rlight->height = FixedClamp((INT64)rlight->height + rlight->heightstep);
+					rlight->height += rlight->heightstep;

 					if (height <= windowtop)
 					{
@@ -425,7 +421,7 @@ static void R_RenderMaskedSegLoop(drawcolumndata_t* dc, drawseg_t *drawseg, INT3
 						for (i++; i < dc->numlights; i++)
 						{
 							rlight = &dc->lightlist[i];
-							rlight->height = FixedClamp((INT64)rlight->height + rlight->heightstep);
+							rlight->height += rlight->heightstep;
 						}

 						continue;
@@ -457,7 +453,7 @@ static void R_RenderMaskedSegLoop(drawcolumndata_t* dc, drawseg_t *drawseg, INT3
 			if (frontsector->extra_colormap)
 				dc->colormap = frontsector->extra_colormap->colormap + (dc->colormap - colormaps);

-			sprtopscreen = FixedClamp((INT64)centeryfrac - FixedMul(dc->texturemid, spryscale));
+			sprtopscreen = centeryfrac - FixedMul(dc->texturemid, spryscale);
 			dc->iscale = 0xffffffffu / (unsigned)spryscale;

 			// draw the texture
@@ -712,6 +708,17 @@ void R_RenderThickSideRange(drawseg_t *drawseg, INT32 x1, INT32 x2, ffloor_t *pf
 	rw_scalestep = drawseg->scalestep;
 	spryscale = drawseg->scale1 + (x1 - drawseg->x1)*rw_scalestep;

+#define CLAMPMAX INT32_MAX
+#define CLAMPMIN (-INT32_MAX) // This is not INT32_MIN on purpose! INT32_MIN makes the drawers freak out.
+	auto overflow_clamp = [&](INT64 overflow_test)
+	{
+		return (overflow_test > (INT64)CLAMPMAX) ? CLAMPMAX :
+		(overflow_test > (INT64)CLAMPMIN) ? (fixed_t)overflow_test :
+		CLAMPMIN;
+	};
+#undef CLAMPMAX
+#undef CLAMPMIN
+
 	dc->numlights = 0;
 	if (frontsector->numlights)
 	{
@@ -727,6 +734,7 @@ void R_RenderThickSideRange(drawseg_t *drawseg, INT32 x1, INT32 x2, ffloor_t *pf
 		{
 			fixed_t leftheight, rightheight;
 			fixed_t pfloorleft, pfloorright;
+			INT64 overflow_test;
 			light = &frontsector->lightlist[i];
 			rlight = &dc->lightlist[p];

@@ -750,14 +758,17 @@ void R_RenderThickSideRange(drawseg_t *drawseg, INT32 x1, INT32 x2, ffloor_t *pf
 					continue;
 			}

-			leftheight  -= viewz;
+			leftheight -= viewz;
 			rightheight -= viewz;

 			// Monster Iestyn (25/03/18): do not skip these lights if they fail overflow test, just clamp them instead so they behave.
-			rlight->height     = FixedClamp((INT64)centeryfrac - (((INT64)leftheight * drawseg->scale1)>>FRACBITS));
-			rlight->heightstep = FixedClamp((INT64)centeryfrac - (((INT64)rightheight * drawseg->scale2)>>FRACBITS));
-			rlight->heightstep = FixedClamp((INT64)rlight->heightstep - rlight->height)/(range);
+			overflow_test = (INT64)centeryfrac - (((INT64)leftheight*drawseg->scale1)>>FRACBITS);
+			rlight->height = overflow_clamp(overflow_test);

+			overflow_test = (INT64)centeryfrac - (((INT64)rightheight*drawseg->scale2)>>FRACBITS);
+			rlight->heightstep = overflow_clamp(overflow_test);
+
+			rlight->heightstep = (rlight->heightstep-rlight->height)/(range);
 			rlight->flags = static_cast<ffloortype_e>(light->flags);

 			if (light->flags & FF_CUTLEVEL)
@@ -768,9 +779,13 @@ void R_RenderThickSideRange(drawseg_t *drawseg, INT32 x1, INT32 x2, ffloor_t *pf
 				rightheight -= viewz;

 				// Monster Iestyn (25/03/18): do not skip these lights if they fail overflow test, just clamp them instead so they behave.
-				rlight->botheight     = FixedClamp((INT64)centeryfrac - (((INT64)leftheight*drawseg->scale1)>>FRACBITS));
-				rlight->botheightstep = FixedClamp(((INT64)centeryfrac - (((INT64)rightheight*drawseg->scale2)>>FRACBITS)));
-				rlight->botheightstep = FixedClamp((INT64)rlight->botheightstep - rlight->botheight)/(range);
+				overflow_test = (INT64)centeryfrac - (((INT64)leftheight*drawseg->scale1)>>FRACBITS);
+				rlight->botheight = overflow_clamp(overflow_test);
+
+				overflow_test = (INT64)centeryfrac - (((INT64)rightheight*drawseg->scale2)>>FRACBITS);
+				rlight->botheightstep = overflow_clamp(overflow_test);
+
+				rlight->botheightstep = (rlight->botheightstep-rlight->botheight)/(range);
 			}

 			rlight->lightlevel = *light->lightlevel;
@@ -879,10 +894,10 @@ void R_RenderThickSideRange(drawseg_t *drawseg, INT32 x1, INT32 x2, ffloor_t *pf
 		right_bottom = P_GetFFloorBottomZAt(pfloor, drawseg->rightpos.x, drawseg->rightpos.y) - viewz;

 		// using INT64 to avoid 32bit overflow
-		top_frac    = FixedClamp((INT64)centeryfrac - (((INT64)left_top     * drawseg->scale1) >> FRACBITS));
-		top_step    = FixedClamp((INT64)centeryfrac - (((INT64)right_top    * drawseg->scale2) >> FRACBITS));
-		bottom_frac = FixedClamp((INT64)centeryfrac - (((INT64)left_bottom  * drawseg->scale1) >> FRACBITS));
-		bottom_step = FixedClamp((INT64)centeryfrac - (((INT64)right_bottom * drawseg->scale2) >> FRACBITS));
+		top_frac =    (INT64)centeryfrac - (((INT64)left_top     * drawseg->scale1) >> FRACBITS);
+		bottom_frac = (INT64)centeryfrac - (((INT64)left_bottom  * drawseg->scale1) >> FRACBITS);
+		top_step =    (INT64)centeryfrac - (((INT64)right_top    * drawseg->scale2) >> FRACBITS);
+		bottom_step = (INT64)centeryfrac - (((INT64)right_bottom * drawseg->scale2) >> FRACBITS);

 		top_step = (top_step-top_frac)/(range);
 		bottom_step = (bottom_step-bottom_frac)/(range);
@@ -904,8 +919,8 @@ void R_RenderThickSideRange(drawseg_t *drawseg, INT32 x1, INT32 x2, ffloor_t *pf

 		// Calculate bounds
 		// clamp the values if necessary to avoid overflows and rendering glitches caused by them
-		sprtopscreen = windowtop = top_frac;
-		sprbotscreen = windowbottom = bottom_frac;
+		sprtopscreen = windowtop = overflow_clamp(top_frac);
+		sprbotscreen = windowbottom = overflow_clamp(bottom_frac);

 		top_frac += top_step;
 		bottom_frac += bottom_step;
@@ -918,11 +933,9 @@ void R_RenderThickSideRange(drawseg_t *drawseg, INT32 x1, INT32 x2, ffloor_t *pf
 				for (i = 0; i < dc->numlights; i++)
 				{
 					rlight = &dc->lightlist[i];
-
-					rlight->height = FixedClamp((INT64)rlight->height + rlight->heightstep);
-
+					rlight->height += rlight->heightstep;
 					if (rlight->flags & FF_CUTLEVEL)
-						rlight->botheight = FixedClamp((INT64)rlight->botheight + rlight->botheightstep);
+						rlight->botheight += rlight->botheightstep;
 				}
 			}

@@ -1030,12 +1043,12 @@ void R_RenderThickSideRange(drawseg_t *drawseg, INT32 x1, INT32 x2, ffloor_t *pf
 					solid = 0;

 				height = rlight->height;
-				rlight->height = FixedClamp((INT64)rlight->height + rlight->heightstep);
+				rlight->height += rlight->heightstep;

 				if (solid)
 				{
-					bheight = FixedClamp((INT64)rlight->botheight - (FRACUNIT >> 1));
-					rlight->botheight = FixedClamp((INT64)rlight->botheight + rlight->botheightstep);
+					bheight = rlight->botheight - (FRACUNIT >> 1);
+					rlight->botheight += rlight->botheightstep;
 				}

 				if (height <= windowtop)
@@ -1063,7 +1076,7 @@ void R_RenderThickSideRange(drawseg_t *drawseg, INT32 x1, INT32 x2, ffloor_t *pf
 					for (i++; i < dc->numlights; i++)
 					{
 						rlight = &dc->lightlist[i];
-						rlight->height = FixedClamp((INT64)rlight->height + rlight->heightstep);
+						rlight->height += rlight->heightstep;

 						if (rlight->flags & FF_CUTLEVEL)
 							rlight->botheight += rlight->botheightstep;
@@ -1197,7 +1210,7 @@ static void R_RenderSegLoop(drawcolumndata_t* dc)
 	for (; rw_x < rw_stopx; rw_x++)
 	{
 		// mark floor / ceiling areas
-		yl = FixedClamp((INT64)topfrac + HEIGHTUNIT-1)>>HEIGHTBITS;
+		yl = (topfrac+HEIGHTUNIT-1)>>HEIGHTBITS;
 		yh = bottomfrac>>HEIGHTBITS;

 		// Mark ceiling
@@ -1348,17 +1361,15 @@ static void R_RenderSegLoop(drawcolumndata_t* dc)
 		//SoM: Calculate offsets for Thick fake floors.
 		// calculate texture offset
 		angle = (rw_centerangle + xtoviewangle[rw_x])>>ANGLETOFINESHIFT;
-
 		// Mask 4095 to guarantee this index is within bounds
-		texturecolumn = FixedClamp((INT64)rw_offset - FixedMul(FINETANGENT(angle & 4095), rw_distance));
+		texturecolumn = rw_offset-FixedMul(FINETANGENT(angle & 4095), rw_distance);

 		if (oldtexturecolumn != -1)
 		{
-			const fixed_t coloff = FixedClamp((INT64)oldtexturecolumn - texturecolumn);
-			rw_bottomtexturemid += FixedMul(rw_bottomtextureslide,  coloff);
-			rw_midtexturemid    += FixedMul(rw_midtextureslide,     coloff);
-			rw_toptexturemid    += FixedMul(rw_toptextureslide,     coloff);
-			rw_midtextureback   += FixedMul(rw_midtexturebackslide, coloff);
+			rw_bottomtexturemid += FixedMul(rw_bottomtextureslide,  oldtexturecolumn-texturecolumn);
+			rw_midtexturemid    += FixedMul(rw_midtextureslide,     oldtexturecolumn-texturecolumn);
+			rw_toptexturemid    += FixedMul(rw_toptextureslide,     oldtexturecolumn-texturecolumn);
+			rw_midtextureback   += FixedMul(rw_midtexturebackslide, oldtexturecolumn-texturecolumn);
 		}
 		oldtexturecolumn = texturecolumn;

@@ -1368,7 +1379,7 @@ static void R_RenderSegLoop(drawcolumndata_t* dc)
 			// calculate lighting
 			pindex = FixedMul(rw_scale, LIGHTRESOLUTIONFIX)>>LIGHTSCALESHIFT;

-			if (pindex >= MAXLIGHTSCALE)
+			if (pindex >=  MAXLIGHTSCALE)
 				pindex = MAXLIGHTSCALE-1;

 			dc->colormap = walllights[pindex];
@@ -1450,8 +1461,8 @@ static void R_RenderSegLoop(drawcolumndata_t* dc)
 			if (toptexture)
 			{
 				// top wall
-				mid = pixhigh >> HEIGHTBITS;
-				pixhigh = FixedClamp((INT64)pixhigh + pixhighstep);
+				mid = pixhigh>>HEIGHTBITS;
+				pixhigh += pixhighstep;

 				if (mid >= floorclip[rw_x])
 					mid = floorclip[rw_x]-1;
@@ -1480,8 +1491,8 @@ static void R_RenderSegLoop(drawcolumndata_t* dc)
 			if (bottomtexture)
 			{
 				// bottom wall
-				mid = FixedClamp((INT64)pixlow+HEIGHTUNIT-1)>>HEIGHTBITS;
-				pixlow = FixedClamp((INT64)pixlow + pixlowstep);
+				mid = (pixlow+HEIGHTUNIT-1)>>HEIGHTBITS;
+				pixlow += pixlowstep;

 				// no space above wall?
 				if (mid <= ceilingclip[rw_x])
@@ -1532,10 +1543,10 @@ static void R_RenderSegLoop(drawcolumndata_t* dc)
 		{
 			for (i = 0; i < dc->numlights; i++)
 			{
-				dc->lightlist[i].height = FixedClamp((INT64)dc->lightlist[i].height + dc->lightlist[i].heightstep);
+				dc->lightlist[i].height += dc->lightlist[i].heightstep;

 				if (dc->lightlist[i].flags & FF_CUTSOLIDS)
-					dc->lightlist[i].botheight = FixedClamp((INT64)dc->lightlist[i].botheight + dc->lightlist[i].botheightstep);;
+					dc->lightlist[i].botheight += dc->lightlist[i].botheightstep;
 			}
 		}

@@ -1556,10 +1567,9 @@ static void R_RenderSegLoop(drawcolumndata_t* dc)
 			visffloor[i].b_frac += visffloor[i].b_step;
 		}

-		rw_scale = FixedClamp((INT64)rw_scale + rw_scalestep);
-
-		topfrac    = FixedClamp((INT64)topfrac + topstep);
-		bottomfrac = FixedClamp((INT64)bottomfrac + bottomstep);
+		rw_scale += rw_scalestep;
+		topfrac += topstep;
+		bottomfrac += bottomstep;
 	}
 }

@@ -1573,7 +1583,7 @@ static void R_MarkSegBounds(void)
 	for (; rw_x < rw_stopx; rw_x++)
 	{
 		// mark floor / ceiling areas
-		yl = FixedClamp((INT64)topfrac + HEIGHTUNIT-1)>>HEIGHTBITS;
+		yl = (topfrac+HEIGHTUNIT-1)>>HEIGHTBITS;
 		yh = bottomfrac>>HEIGHTBITS;

 		// Mark ceiling
@@ -1810,7 +1820,7 @@ void R_StoreWallRange(INT32 start, INT32 stop)

 	// big room fix
 	if (longboi)
-		rw_distance = FixedClamp(R_CalcSegDist(curline, viewx, viewy));
+		rw_distance = (fixed_t)R_CalcSegDist(curline,viewx,viewy);

 	ds_p->x1 = rw_x = start;
 	ds_p->x2 = stop;
@@ -2193,8 +2203,8 @@ void R_StoreWallRange(INT32 start, INT32 stop)
 			}
 		}

-		rw_toptexturemid = FixedClamp((INT64)rw_toptexturemid + sidedef->rowoffset);
-		rw_bottomtexturemid = FixedClamp((INT64)rw_bottomtexturemid + sidedef->rowoffset);
+		rw_toptexturemid += sidedef->rowoffset;
+		rw_bottomtexturemid += sidedef->rowoffset;

 		R_AllocTextureColumnTables(rw_stopx - start);

@@ -2479,9 +2489,8 @@ void R_StoreWallRange(INT32 start, INT32 stop)
 			rw_offset = -rw_offset;

 		/// don't use texture offset for splats
-		rw_offset2 = FixedClamp((INT64)rw_offset + curline->offset);
-		rw_offset = FixedClamp((INT64)rw_offset + (INT64)sidedef->textureoffset + curline->offset);
-
+		rw_offset2 = rw_offset + curline->offset;
+		rw_offset += sidedef->textureoffset + curline->offset;
 		rw_centerangle = ANGLE_90 + viewangle - rw_normalangle;

 		// calculate light table
@@ -2541,8 +2550,8 @@ void R_StoreWallRange(INT32 start, INT32 stop)

 		auto set_topstep_normal = [&]
 		{
-			topstep = -FixedMul(rw_scalestep, worldtop);
-			topfrac = FixedClamp((INT64)(centeryfrac>>4) - FixedMul(worldtop, rw_scale));
+			topstep = -FixedMul (rw_scalestep, worldtop);
+			topfrac = (centeryfrac>>4) - FixedMul (worldtop, rw_scale);
 		};

 		// untextured seg
@@ -2563,14 +2572,14 @@ void R_StoreWallRange(INT32 start, INT32 stop)
 			// this is an attempt to fix issues with textureless single sided lines drawing nothing where they should just draw sky instead
 			if (tophigh && !backsector && frontsector->ceilingpic == skyflatnum)
 			{
-				topstep = -FixedMul(rw_scalestep, worldbottom);
-				topfrac = FixedClamp((INT64)(centeryfrac>>4) - FixedMul(worldbottom, rw_scale));
+				topstep = -FixedMul (rw_scalestep, worldbottom);
+				topfrac = (centeryfrac>>4) - FixedMul (worldbottom, rw_scale);

 				// account for slopes to try and get rid of sharp edges from the black void
 				if (frontsector->f_slope || (backsector && backsector->f_slope))
 				{
-					topstep = -FixedMul(rw_scalestep, worldbottomslope);
-					topfrac = FixedClamp((INT64)(centeryfrac>>4) - FixedMul(worldbottomslope, rw_scale));
+					topstep = -FixedMul (rw_scalestep, worldbottomslope);
+					topfrac = (centeryfrac>>4) - FixedMul (worldbottomslope, rw_scale);
 				}
 			}
 			else
@@ -2579,18 +2588,18 @@ void R_StoreWallRange(INT32 start, INT32 stop)
 		else
 			set_topstep_normal();

-		bottomstep = -FixedMul(rw_scalestep, worldbottom);
-		bottomfrac = FixedClamp((INT64)(centeryfrac>>4) - FixedMul(worldbottom, rw_scale));
+		bottomstep = -FixedMul (rw_scalestep, worldbottom);
+		bottomfrac = (centeryfrac>>4) - FixedMul (worldbottom, rw_scale);

 		if (frontsector->c_slope)
 		{
-			fixed_t topfracend = FixedClamp((INT64)(centeryfrac>>4) - FixedMul(worldtopslope, ds_p->scale2));
+			fixed_t topfracend = (centeryfrac>>4) - FixedMul (worldtopslope, ds_p->scale2);
 			topstep = (topfracend-topfrac)/(range);
 		}

 		if (frontsector->f_slope)
 		{
-			fixed_t bottomfracend = FixedClamp((INT64)(centeryfrac>>4) - FixedMul(worldbottomslope, ds_p->scale2));
+			fixed_t bottomfracend = (centeryfrac>>4) - FixedMul (worldbottomslope, ds_p->scale2);
 			bottomstep = (bottomfracend-bottomfrac)/(range);
 		}
 	}
@@ -2632,9 +2641,9 @@ void R_StoreWallRange(INT32 start, INT32 stop)
 					continue;
 			}

-			rlight->height = FixedClamp((INT64)(centeryfrac>>4) - FixedMul(leftheight, rw_scale));
-			rlight->heightstep = FixedClamp((INT64)(centeryfrac>>4) - FixedMul(rightheight, ds_p->scale2));
-			rlight->heightstep = FixedClamp((INT64)rlight->heightstep - rlight->height)/(range);
+			rlight->height = (centeryfrac>>4) - FixedMul(leftheight, rw_scale);
+			rlight->heightstep = (centeryfrac>>4) - FixedMul(rightheight, ds_p->scale2);
+			rlight->heightstep = (rlight->heightstep-rlight->height)/(range);
 			rlight->flags = static_cast<ffloortype_e>(light->flags);

 			if (light->caster && light->caster->flags & FF_CUTSOLIDS)
@@ -2696,9 +2705,9 @@ void R_StoreWallRange(INT32 start, INT32 stop)

 		if (toptexture)
 		{
-			fixed_t topfracend = FixedClamp((INT64)(centeryfrac>>4) - FixedMul(worldhighslope, ds_p->scale2));
+			fixed_t topfracend = (centeryfrac>>4) - FixedMul(worldhighslope, ds_p->scale2);

-			pixhigh = FixedClamp((INT64)(centeryfrac>>4) - FixedMul(worldhigh, rw_scale));
+			pixhigh = (centeryfrac>>4) - FixedMul (worldhigh, rw_scale);
 			pixhighstep = (topfracend-pixhigh)/(range);

 			// If the lowest part of a ceiling stretching down covers the entire screen
@@ -2708,9 +2717,9 @@ void R_StoreWallRange(INT32 start, INT32 stop)

 		if (bottomtexture)
 		{
-			fixed_t bottomfracend = FixedClamp((INT64)(centeryfrac>>4) - FixedMul(worldlowslope, ds_p->scale2));
+			fixed_t bottomfracend = (centeryfrac>>4) - FixedMul (worldlowslope, ds_p->scale2);

-			pixlow = FixedClamp((INT64)(centeryfrac>>4) - FixedMul(worldlow, rw_scale));
+			pixlow = (centeryfrac>>4) - FixedMul (worldlow, rw_scale);
 			pixlowstep = (bottomfracend-pixlow)/(range);

 			// If the highest part of a floor stretching up covers the entire screen
@@ -2731,8 +2740,8 @@ void R_StoreWallRange(INT32 start, INT32 stop)
 				visffloor[i].b_pos_slope = roverright;
 				visffloor[i].b_pos >>= 4;
 				visffloor[i].b_pos_slope >>= 4;
-				visffloor[i].b_frac = FixedClamp((INT64)(centeryfrac>>4) - FixedMul(visffloor[i].b_pos, rw_scale));
-				visffloor[i].b_step = FixedClamp((INT64)(centeryfrac>>4) - FixedMul(visffloor[i].b_pos_slope, ds_p->scale2));
+				visffloor[i].b_frac = (centeryfrac >> 4) - FixedMul(visffloor[i].b_pos, rw_scale);
+				visffloor[i].b_step = (centeryfrac >> 4) - FixedMul(visffloor[i].b_pos_slope, ds_p->scale2);
 				visffloor[i].b_step = (visffloor[i].b_step-visffloor[i].b_frac)/(range);
 			};

@@ -2838,7 +2847,7 @@ void R_StoreWallRange(INT32 start, INT32 stop)
 					visffloor[i].b_pos = height;
 					visffloor[i].b_pos = (visffloor[i].b_pos - viewz) >> 4;
 					visffloor[i].b_step = FixedMul(-rw_scalestep, visffloor[i].b_pos);
-					visffloor[i].b_frac = FixedClamp((INT64)(centeryfrac>>4) - FixedMul(visffloor[i].b_pos, rw_scale));
+					visffloor[i].b_frac = (centeryfrac >> 4) - FixedMul(visffloor[i].b_pos, rw_scale);
 				};

 				while (i < numffloors && visffloor[i].polyobj != curline->polyseg)
@@ -2869,7 +2878,7 @@ void R_StoreWallRange(INT32 start, INT32 stop)
 	if (markceiling)
 	{
 		if (ceilingplane) //SoM: 3/29/2000: Check for null ceiling planes
-			ceilingplane = R_CheckPlane(ceilingplane, rw_x, rw_stopx-1);
+			ceilingplane = R_CheckPlane (ceilingplane, rw_x, rw_stopx-1);
 		else
 			markceiling = false;

@@ -2883,7 +2892,7 @@ void R_StoreWallRange(INT32 start, INT32 stop)
 	if (markfloor)
 	{
 		if (floorplane) //SoM: 3/29/2000: Check for null planes
-			floorplane = R_CheckPlane(floorplane, rw_x, rw_stopx-1);
+			floorplane = R_CheckPlane (floorplane, rw_x, rw_stopx-1);
 		else
 			markfloor = false;

@@ -11,7 +11,6 @@
 /// \file  r_things.c
 /// \brief Refresh of things, i.e. objects represented by sprites

-#include "m_fixed.h"
 #include "r_main.h" // stplyr
 #include "r_fps.h"
 #include "r_things.h"
@@ -71,7 +70,7 @@ INT16 *screenheightarray = NULL;

 typedef struct drawseg_xrange_item_s
 {
-	INT32 x1, x2;
+	INT16 x1, x2;
 	drawseg_t *user;
 } drawseg_xrange_item_t;

@@ -490,8 +489,8 @@ void R_InitSprites(void)
 	for (angle = 1; angle < ROTANGLES; angle++)
 	{
 		fa = ANG2RAD(FixedAngle((ROTANGDIFF * angle)<<FRACBITS));
-		rollcosang[angle] = FLOAT_TO_FIXED(cosf(-fa));
-		rollsinang[angle] = FLOAT_TO_FIXED(sinf(-fa));
+		rollcosang[angle] = FLOAT_TO_FIXED(cos(-fa));
+		rollsinang[angle] = FLOAT_TO_FIXED(sin(-fa));
 	}
 #endif

@@ -617,11 +616,10 @@ void R_DrawMaskedColumn(drawcolumndata_t* dc, column_t *column)
 		if (topdelta <= prevdelta)
 			topdelta += prevdelta;
 		prevdelta = topdelta;
+		topscreen = sprtopscreen + spryscale*topdelta;
+		bottomscreen = topscreen + spryscale*column->length;

-		topscreen    = FixedClamp((INT64)sprtopscreen + (INT64)spryscale * (INT64)topdelta);
-		bottomscreen = FixedClamp((INT64)topscreen + (INT64)spryscale * (INT64)column->length);
-
-		dc->yl = FixedClamp((INT64)topscreen + (FRACUNIT-1))>>FRACBITS;
+		dc->yl = (topscreen+FRACUNIT-1)>>FRACBITS;
 		dc->yh = (bottomscreen-1)>>FRACBITS;

 		if (windowtop != INT32_MAX && windowbottom != INT32_MAX)
@@ -887,7 +885,7 @@ static void R_DrawVisSprite(vissprite_t *vis)
 		for (dc.x = vis->x1; dc.x <= vis->x2; dc.x++, spryscale += scalestep)
 		{
 			angle_t angle = ((vis->centerangle + xtoviewangle[dc.x]) >> ANGLETOFINESHIFT) & 0xFFF;
-			texturecolumn = FixedClamp((INT64)vis->paperoffset - FixedMul(FINETANGENT(angle), vis->paperdistance)) / horzscale;
+			texturecolumn = (vis->paperoffset - FixedMul(FINETANGENT(angle), vis->paperdistance)) / horzscale;

 			if (texturecolumn < 0 || texturecolumn >= pwidth)
 				continue;
@@ -63,7 +63,6 @@ typedef struct viddef_s

 	INT32 dup;         // scale 1, 2, 3 value for menus & overlays
 	INT32 fdup;        // same as dup, but exact value when aspect ratio isn't 320/200
-	INT32 udup;        // same as dup but does not account for highreshudscale
 	UINT8 smalldup;    // factor for a little bit of scaling
 	UINT8 meddup;      // factor for moderate, but not full, scaling

@@ -32,7 +32,7 @@ set(SRB2_SDL2_SOURCES
 	hwsym_sdl.c
 	i_main.c
 	i_net.c
-	i_system.cpp
+	i_system.c
 	i_ttf.c
 	i_video.c
 	i_threads.c
@@ -123,6 +123,8 @@ if(${SDL2_FOUND})
 		set(MACOSX_BUNDLE_ICON_FILE Srb2mac.icns)
 		set_source_files_properties(macosx/Srb2mac.icns PROPERTIES MACOSX_PACKAGE_LOCATION "Resources")
 		set(SRB2_SDL2_MAC_SOURCES
+			macosx/mac_alert.c
+			macosx/mac_alert.h
 			macosx/mac_resources.c
 			macosx/mac_resources.h
 			macosx/Srb2mac.icns
@@ -165,15 +167,10 @@ if(${SDL2_FOUND})
 		${DISCORDRPC_LIBRARIES}
 	)

-	if(${SRB2_HAVE_LIBBACKTRACE})
-		target_link_libraries(SRB2SDL2 PRIVATE ${LIBBACKTRACE_LIBRARIES})
-	endif()
-
 	if(${CMAKE_SYSTEM} MATCHES Linux)
 		target_link_libraries(SRB2SDL2 PRIVATE
 			m
 			rt
-			pthread
 		)
 	endif()

@@ -229,20 +226,6 @@ if(${SDL2_FOUND})
 		-DHAVE_THREADS
 	)

-	if(SRB2_CONFIG_LTO AND NOT SRB2_CONFIG_DEBUGMODE)
-		set_property(TARGET SRB2SDL2 PROPERTY INTERPROCEDURAL_OPTIMIZATION TRUE)
-	endif()
-
-	if(SRB2_CONFIG_ASAN)
-		target_compile_options(SRB2SDL2 PRIVATE -fsanitize=address)
-		target_link_options(SRB2SDL2 PRIVATE -fsanitize=address)
-	endif()
-
-	if(SRB2_CONFIG_UBSAN)
-		target_compile_options(SRB2SDL2 PRIVATE -fsanitize=undefined)
-		target_link_options(SRB2SDL2 PRIVATE -fsanitize=undefined)
-	endif()
-
 	## strip debug symbols into separate file when using gcc
 	# if(CMAKE_COMPILER_IS_GNUCC)
 	# 	if(${CMAKE_BUILD_TYPE} MATCHES Debug)
@@ -309,7 +292,7 @@ if(${SDL2_FOUND})
 			else()
 				find_library(SRB2_SDL2_DLL_${dllname} "${defaultname}")
 				list(APPEND win_extra_dll_list ${SRB2_SDL2_DLL_${dllname}})
-			endif()
+	endif()
 		endmacro()
 		getwinlib(SDL2 "SDL2.dll")
 		if(${SRB2_CONFIG_SDL2_USEMIXER})
@@ -31,10 +31,6 @@

 #include <signal.h>

-#if defined (__unix__) || defined(__APPLE__) || defined (UNIXCOMMON)
-#include <poll.h>
-#endif
-
 #ifdef _WIN32
 #define RPC_NO_WINDOWS_H
 #include <windows.h>
@@ -205,6 +201,10 @@ static char returnWadPath[256];

 #include "../s_sound.h"

+#ifdef MAC_ALERT
+#include "macosx/mac_alert.h"
+#endif
+
 #include "../d_main.h"

 #if !defined(NOMUMBLE) && defined(HAVE_MUMBLE)
@@ -726,9 +726,7 @@ static void JoyReset(SDLJoyInfo_t *JoySet)

 	JoySet->dev = NULL;
 	JoySet->oldjoy = -1;
-#if (SDL_VERSION_ATLEAST(2,32,4))
 	JoySet->id = -1;
-#endif
 }

 /**	\brief SDL info about joystick
@@ -785,11 +783,7 @@ void I_UpdateJoystickDeviceIndex(UINT8 player)
 	///////////////////////////////////////////////
 	if (JoyInfo[player].dev)
 	{
-#if (SDL_VERSION_ATLEAST(2,32,4))
 		cv_usejoystick[player].value = JoyInfo[player].id + 1;
-#else
-		cv_usejoystick[player].value = I_GetJoystickDeviceIndex(JoyInfo[player].dev) + 1;
-#endif
 	}
 	else
 	{
@@ -891,13 +885,13 @@ static int joy_open(int playerIndex, int joyIndex)

 	if (SDL_WasInit(SDL_INIT_JOYSTICK) == 0)
 	{
-		CONS_Printf("Joystick subsystem not started\n");
+		CONS_Printf(M_GetText("Joystick subsystem not started\n"));
 		return -1;
 	}

 	if (SDL_WasInit(SDL_INIT_GAMECONTROLLER) == 0)
 	{
-		CONS_Printf("Game Controller subsystem not started\n");
+		CONS_Printf(M_GetText("Game Controller subsystem not started\n"));
 		return -1;
 	}

@@ -908,7 +902,7 @@ static int joy_open(int playerIndex, int joyIndex)

 	if (num_joy == 0)
 	{
-		CONS_Printf("%s", "Found no joysticks on this system\n");
+		CONS_Printf("%s", M_GetText("Found no joysticks on this system\n"));
 		return -1;
 	}

@@ -931,7 +925,7 @@ static int joy_open(int playerIndex, int joyIndex)
 			return SDL_CONTROLLER_AXIS_MAX;

 		// Else, we're changing devices, so send neutral joy events
-		CONS_Debug(DBG_GAMELOGIC, "Joystick %d device is changing; resetting events...\n", playerIndex+1);
+		CONS_Debug(DBG_GAMELOGIC, "Joystick1 device is changing; resetting events...\n");
 		I_ShutdownJoystick(playerIndex);
 	}

@@ -939,15 +933,13 @@ static int joy_open(int playerIndex, int joyIndex)

 	if (JoyInfo[playerIndex].dev == NULL)
 	{
-		CONS_Debug(DBG_GAMELOGIC, "Joystick %d: Couldn't open device - %s\n", playerIndex+1, SDL_GetError());
+		CONS_Debug(DBG_GAMELOGIC, M_GetText("Joystick1: Couldn't open device - %s\n"), SDL_GetError());
 		return -1;
 	}

-	CONS_Debug(DBG_GAMELOGIC, "Joystick %d: %s\n", playerIndex+1, SDL_GameControllerName(JoyInfo[playerIndex].dev));
+	CONS_Debug(DBG_GAMELOGIC, M_GetText("Joystick1: %s\n"), SDL_GameControllerName(JoyInfo[playerIndex].dev));

-#if (SDL_VERSION_ATLEAST(2,32,4))
 	JoyInfo[playerIndex].id = I_GetJoystickDeviceIndex(JoyInfo[playerIndex].dev);
-#endif

 	return SDL_CONTROLLER_AXIS_MAX;
 }
@@ -993,9 +985,7 @@ void I_InitJoystick(UINT8 index)

 	JoyInfo[index].dev = NULL;
 	JoyInfo[index].oldjoy = -1;
-#if (SDL_VERSION_ATLEAST(2,32,4))
 	JoyInfo[index].id = -1;
-#endif

 	if (cv_usejoystick[index].value)
 		newcontroller = SDL_GameControllerOpen(cv_usejoystick[index].value-1);
@@ -1009,27 +999,17 @@ void I_InitJoystick(UINT8 index)
 			break;
 	}

-#if (SDL_VERSION_ATLEAST(2,32,4))
 	JoyInfo[index].id = I_GetJoystickDeviceIndex(JoyInfo[index].dev);
-#endif

 	if (newcontroller && i < MAXSPLITSCREENPLAYERS) // don't override an active device
 	{
-#if (SDL_VERSION_ATLEAST(2,32,4))
 		cv_usejoystick[index].value = JoyInfo[index].id + 1;
-#else
-		cv_usejoystick[index].value = I_GetJoystickDeviceIndex(JoyInfo[index].dev) + 1;
-#endif
 	}
 	else if (newcontroller && joy_open(index, cv_usejoystick[index].value) != -1)
 	{
-#if (SDL_VERSION_ATLEAST(2,32,4))
-		JoyInfo[index].oldjoy = JoyInfo[index].id + 1;
-#else
 		// SDL's device indexes are unstable, so cv_usejoystick may not match
 		// the actual device index. So let's cheat a bit and find the device's current index.
-		JoyInfo[index].oldjoy = I_GetJoystickDeviceIndex(JoyInfo[index].dev) + 1;
-#endif
+		JoyInfo[index].oldjoy = JoyInfo[index].id + 1;
 	}
 	else
 	{
@@ -1649,13 +1629,24 @@ static int I_OpenURL(const char *url)
 #endif
 }

-static void I_ShowErrorBox(const char *title, const char *msg)
+static void I_ReportSignal(int num, int coredumped)
 {
+	char sigmsg[512];
+	char signame[128];
+	char sigttl[512] = "Process killed by signal: ";
+	const char *reportmsg = "\n\n\nTo help us figure out the cause, please report the issue to our github page with " CRASH_LOGFILE_NAME " attached.\n\nSorry for the inconvenience!";
+
+	I_PrintSignal(num, coredumped, sigmsg, signame);
+
+	size_t len = strlen(sigmsg);
+	snprintf(sigmsg + len, sizeof(sigmsg) - len, "\n\nCrash report has been saved into %s", CRASH_LOGFILE_NAME);
+
+	strcat(sigttl, signame);
+	I_OutputMsg("\n%s\n\n", sigttl);
+
 	if (M_CheckParm("-dedicated"))
 		return;

-	const char *reportmsg = "\n\n\nTo help us figure out the cause, please report the issue to our github page with " CRASH_LOGFILE_NAME " attached.\n\nSorry for the inconvenience!";
-
 	const SDL_MessageBoxButtonData buttons[] = {
 		{ SDL_MESSAGEBOX_BUTTON_RETURNKEY_DEFAULT, 0,		"OK" },
 		{ 										0, 1,		"Report Issue" },
@@ -1664,8 +1655,8 @@ static void I_ShowErrorBox(const char *title, const char *msg)
 	const SDL_MessageBoxData messageboxdata = {
 		SDL_MESSAGEBOX_ERROR, 			/* .flags */
 		NULL, 							/* .window */
-		title, 							/* .title */
-		va("%s %s", msg, reportmsg), 	/* .message */
+		sigttl, 						/* .title */
+		va("%s %s", sigmsg, reportmsg), /* .message */
 		SDL_arraysize(buttons), 		/* .numbuttons */
 		buttons, 						/* .buttons */
 		NULL 							/* .colorScheme */
@@ -1679,39 +1670,6 @@ static void I_ShowErrorBox(const char *title, const char *msg)
 		I_OpenURL("https://github.com/Indev450/SRB2Kart-Saturn/issues");
 }

-static void I_ShowSimpleErrorBox(const char *title, char *msg)
-{
-	if (M_CheckParm("-dedicated"))
-		return;
-
-	// Implement message box with SDL_ShowSimpleMessageBox,
-	// which should fail gracefully if it can't put a message box up
-	// on the target system
-	SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, title, msg, NULL);
-	// Note that SDL_ShowSimpleMessageBox does *not* require SDL to be
-	// initialized at the time, so calling it after SDL_Quit() is
-	// perfectly okay! In addition, we do this on purpose so the
-	// fullscreen window is closed before displaying the error message
-	// in case the fullscreen window blocks it for some absurd reason.
-}
-
-static void I_ReportSignal(int num, int coredumped)
-{
-	char sigmsg[512];
-	char signame[128];
-	char sigttl[512] = "Process killed by signal: ";
-
-	I_PrintSignal(num, coredumped, sigmsg, signame);
-
-	size_t len = strlen(sigmsg);
-	snprintf(sigmsg + len, sizeof(sigmsg) - len, "\n\nCrash report has been saved into %s", CRASH_LOGFILE_NAME);
-
-	strcat(sigttl, signame);
-	I_OutputMsg("\n%s\n\n", sigttl);
-	//I_ShowSimpleErrorBox(sigttl, sigmsg);
-	I_ShowErrorBox(sigttl, sigmsg);
-}
-
 #ifndef NEWSIGNALHANDLER
 FUNCNORETURN static ATTRNORETURN void signal_handler(INT32 num)
 {
@@ -1817,7 +1775,10 @@ FUNCNORETURN static ATTRNORETURN void newsignalhandler_Warn(const char *pr)
 	);

 	I_OutputMsg("%s\n", text);
-	I_ShowSimpleErrorBox("Startup error", text);
+
+	SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR,
+		"Startup error",
+		text, NULL);

 	I_ShutdownConsole();
 	exit(-1);
@@ -1979,7 +1940,6 @@ FUNCIERROR void ATTRNORETURN I_Error(const char *error, ...)
 {
 	va_list argptr;
 	char buffer[8192];
-	const char *sigttl = "";

 #ifdef HAVE_THREADS
 	if (std::this_thread::get_id() != g_main_thread_id)
@@ -2016,9 +1976,12 @@ FUNCIERROR void ATTRNORETURN I_Error(const char *error, ...)
 			va_start(argptr, error);
 			vsnprintf(buffer, 8192, error, argptr);
 			va_end(argptr);
-
-			sigttl = "SRB2Kart " VERSIONSTRING " Recursive Error";
-			I_ShowSimpleErrorBox(sigttl, buffer);
+			// Implement message box with SDL_ShowSimpleMessageBox,
+			// which should fail gracefully if it can't put a message box up
+			// on the target system
+			SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR,
+				"SRB2Kart " VERSIONSTRING " Recursive Error",
+				buffer, NULL);

 			W_Shutdown();
 			exit(-1); // recursive errors detected
@@ -2058,9 +2021,15 @@ FUNCIERROR void ATTRNORETURN I_Error(const char *error, ...)
 	I_ShutdownSystem();
 	SDL_Quit();

-	sigttl = "SRB2Kart " VERSIONSTRING " Error";
-	//I_ShowSimpleErrorBox(sigttl, buffer);
-	I_ShowErrorBox(sigttl, buffer);
+	// Implement message box with SDL_ShowSimpleMessageBox,
+	// which should fail gracefully if it can't put a message box up
+	// on the target system
+	SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "SRB2Kart " VERSIONSTRING " Error", buffer, NULL);
+	// Note that SDL_ShowSimpleMessageBox does *not* require SDL to be
+	// initialized at the time, so calling it after SDL_Quit() is
+	// perfectly okay! In addition, we do this on purpose so the
+	// fullscreen window is closed before displaying the error message
+	// in case the fullscreen window blocks it for some absurd reason.

 	W_Shutdown();

@@ -2486,7 +2455,7 @@ static const char *locateWad(void)
 	return NULL;
 }

-extern "C" const char *I_LocateWad(void)
+const char *I_LocateWad(void)
 {
 	const char *waddir = NULL;

@@ -9,8 +9,6 @@
 /// \file  i_threads.c
 /// \brief Multithreading abstraction

-#ifdef HAVE_THREADS
-
 #include "../doomdef.h"
 #include "../i_threads.h"

@@ -356,5 +354,3 @@ I_wake_all_cond (
 	if (SDL_CondBroadcast(cond) == -1)
 		abort();
 }
-
-#endif // HAVE_THREADS
@@ -784,11 +784,7 @@ static void Impl_HandleControllerAxisEvent(SDL_ControllerAxisEvent evt)
 	// Determine the Joystick IDs for each current open joystick
 	for (i = 0; i < MAXSPLITSCREENPLAYERS; i++)
 	{
-#if (SDL_VERSION_ATLEAST(2,32,4))
 		if (evt.which == JoyInfo[i].id)
-#else
-		if (evt.which == SDL_JoystickInstanceID(SDL_GameControllerGetJoystick(JoyInfo[i].dev)))
-#endif
 		{
 			event.type = ev_joystick + i;
 			break;
@@ -848,11 +844,7 @@ static void Impl_HandleControllerHatEvent(SDL_ControllerButtonEvent evt, Uint32
 	// Determine the Joystick IDs for each current open joystick
 	for (i = 0; i < MAXSPLITSCREENPLAYERS; i++)
 	{
-#if (SDL_VERSION_ATLEAST(2,32,4))
 		if (evt.which == JoyInfo[i].id)
-#else
-		if (evt.which == SDL_JoystickInstanceID(SDL_GameControllerGetJoystick(JoyInfo[i].dev)))
-#endif
 		{
 			event.data1 = hat_buttons_base[i];
 			break;
@@ -914,11 +906,7 @@ static void Impl_HandleControllerButtonEvent(SDL_ControllerButtonEvent evt, Uint
 	// Determine the Joystick IDs for each current open joystick
 	for (i = 0; i < MAXSPLITSCREENPLAYERS; i++)
 	{
-#if (SDL_VERSION_ATLEAST(2,32,4))
 		if (evt.which == JoyInfo[i].id)
-#else
-		if (evt.which == SDL_JoystickInstanceID(SDL_GameControllerGetJoystick(JoyInfo[i].dev)))
-#endif
 		{
 			event.data1 = buttons_base[i];
 			break;
@@ -0,0 +1,64 @@
+// Emacs style mode select   -*- C++ -*-
+//-----------------------------------------------------------------------------
+//
+// Copyright (C) 1993-1996 by id Software, Inc.
+// Portions Copyright (C) 1998-2000 by DooM Legacy Team.
+//
+// This program is free software; you can redistribute it and/or
+// modify it under the terms of the GNU General Public License
+// as published by the Free Software Foundation; either version 2
+// of the License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//-----------------------------------------------------------------------------
+/// \file
+/// \brief Graphical Alerts for MacOSX
+///
+///	Shows alerts, since we can't just print these to the screen when
+///	launched graphically on a mac.
+
+#ifdef __APPLE_CC__
+
+#include "mac_alert.h"
+#include <CoreFoundation/CoreFoundation.h>
+
+#define CFSTRINGIFY(x) CFStringCreateWithCString(NULL, x, kCFStringEncodingASCII)
+
+int MacShowAlert(const char *title, const char *message, const char *button1, const char *button2, const char *button3)
+{
+	CFOptionFlags results;
+
+        CFStringRef cf_title   = CFSTRINGIFY(title);
+        CFStringRef cf_message = CFSTRINGIFY(message);
+        CFStringRef cf_button1 = NULL;
+        CFStringRef cf_button2 = NULL;
+        CFStringRef cf_button3 = NULL;
+
+        if (button1 != NULL)
+            cf_button1 = CFSTRINGIFY(button1);
+        if (button2 != NULL)
+            cf_button2 = CFSTRINGIFY(button2);
+        if (button3 != NULL)
+            cf_button3 = CFSTRINGIFY(button3);
+
+        CFOptionFlags alert_flags = kCFUserNotificationStopAlertLevel | kCFUserNotificationNoDefaultButtonFlag;
+
+	CFUserNotificationDisplayAlert(0, alert_flags, NULL, NULL, NULL, cf_title, cf_message,
+                                       cf_button1, cf_button2, cf_button3, &results);
+
+        if (cf_button1 != NULL)
+           CFRelease(cf_button1);
+        if (cf_button2 != NULL)
+           CFRelease(cf_button2);
+        if (cf_button3 != NULL)
+           CFRelease(cf_button3);
+        CFRelease(cf_message);
+        CFRelease(cf_title);
+
+	return (int)results;
+}
+
+#endif
@@ -0,0 +1,27 @@
+// Emacs style mode select   -*- C++ -*-
+//-----------------------------------------------------------------------------
+//
+// Copyright (C) 1993-1996 by id Software, Inc.
+// Portions Copyright (C) 1998-2000 by DooM Legacy Team.
+//
+// This program is free software; you can redistribute it and/or
+// modify it under the terms of the GNU General Public License
+// as published by the Free Software Foundation; either version 2
+// of the License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//-----------------------------------------------------------------------------
+/// \file
+/// \brief Graphical Alerts for MacOSX
+///
+///	Shows alerts, since we can't just print these to the screen when
+///	launched graphically on a mac.
+
+#ifdef __APPLE_CC__
+
+extern int MacShowAlert(const char *title, const char *message, const char *button1, const char *button2, const char *button3);
+
+#endif
@@ -1,11 +1,5 @@
 #ifndef __MAC_RESOURCES_H__
 #define __MAC_RESOURCES_H__

-#ifdef __cplusplus
-extern "C" {
-#endif
 void OSX_GetResourcesPath(char * buffer);
-#ifdef __cplusplus
-}
-#endif
-#endif
+#endif
@@ -1107,7 +1107,7 @@ UINT32 I_GetSongPosition(void)

 void I_UpdateSongLagThreshold(void)
 {
-	stutter_threshold = (UINT32)(cv_music_resync_powerups_only.value ? 0 : (cv_music_resync_threshold.value/1000.0*(4*44100)));
+	stutter_threshold = cv_music_resync_powerups_only.value ? 0 : (cv_music_resync_threshold.value/1000.0*(4*44100));
 }

 /// ------------------------
@@ -23,8 +23,6 @@
 extern "C" {
 #endif

-#include "SDL_version.h"
-
 #include "../m_fixed.h"

 // SDL2 stub macro
@@ -41,10 +39,8 @@ typedef struct SDLJoyInfo_s
 {
 	/// Controller handle
 	SDL_GameController *dev;
-#if (SDL_VERSION_ATLEAST(2,32,4))
 	/// Controller index
 	INT32 id;
-#endif
 	/// number of old joystick
 	int oldjoy;
 	/// number of axies
@@ -23,10 +23,6 @@ ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

-#include <string.h>
-#include <ctype.h>
-#include <stddef.h>
-
 static inline int
 trycmp (char **pp, char *cp,
 		const char *q, size_t qn)
@@ -465,7 +465,7 @@ void V_CubeApply(RGBA_t *input)
 	if (!Cubeapply)
 		return;

-	linear = ((*input).s.red/255.0f);
+	linear = ((*input).s.red/255.0);
 #define dolerp(e1, e2) ((1 - linear)*e1 + linear*e2)
 	for (q = 0; q < 3; q++)
 	{
@@ -475,21 +475,21 @@ void V_CubeApply(RGBA_t *input)
 		working[3][q] = dolerp(Cubepal[0][1][1][q], Cubepal[1][1][1][q]);
 	}

-	linear = ((*input).s.green/255.0f);
+	linear = ((*input).s.green/255.0);
 	for (q = 0; q < 3; q++)
 	{
 		working[0][q] = dolerp(working[0][q], working[1][q]);
 		working[1][q] = dolerp(working[2][q], working[3][q]);
 	}

-	linear = ((*input).s.blue/255.0f);
+	linear = ((*input).s.blue/255.0);
 	for (q = 0; q < 3; q++)
 	{
 		working[0][q] = 255*dolerp(working[0][q], working[1][q]);
 		if (working[0][q] > 255.0f)
 			working[0][q] = 255.0f;
 		else if (working[0][q] < 0.0f)
-			working[0][q] = 0.0f;
+			working[0][q] = 0.0;
 	}
 #undef dolerp

@@ -1760,15 +1760,17 @@ void V_DrawVhsEffect(boolean rewind)
 	if (cv_reducevfx.value)
 		return;

-	barsize = vid.udup << 5;
-	updistort = vid.udup << (rewind ? 5 : 3);
+	const INT32 dup = min(vid.width / BASEVIDWIDTH, vid.height / BASEVIDHEIGHT);
+
+	barsize = dup << 5;
+	updistort = dup << (rewind ? 5 : 3);
 	downdistort = updistort >> 1;

 	if (rewind)
 		V_DrawVhsEffect(false); // experimentation

-	upbary -= renderdeltatics * (fixed_t)(vid.udup * (rewind ? 3 : 1.8f));
-	downbary += renderdeltatics * (vid.udup * (rewind ? 2 : 1));
+	upbary -= renderdeltatics * (fixed_t)(dup * (rewind ? 3 : 1.8f));
+	downbary += renderdeltatics * (dup * (rewind ? 2 : 1));

 	if (upbary < -barsize*FRACUNIT)
 		upbary = vid.height << FRACBITS;
@@ -3928,8 +3930,6 @@ void V_Recalc(void)
 		vid.fdup = (vid.height*FRACUNIT) / BASEVIDHEIGHT;
 	}

-	vid.udup = vid.dup;
-
 	if (loaded_config // this could use a better name, since it is more and indicator that early startup is done and its safe to do sketchy shit now :chaosleep:
 	&& (vid.width > 720) && (vid.height > 1280)) // ehhhh well this thing has so many issues, so ill lock it to higher resolutions instead
 	{