Add files

CMakeLists.txt

@@ -0,0 +1,212 @@
+cmake_minimum_required(VERSION 3.16)
+
+###########################################################
+# COMPILER CONFIGURATION
+###########################################################
+set(CMAKE_C_COMPILER "clang" CACHE STRING "C compiler" FORCE)
+set(CMAKE_CXX_COMPILER "clang++" CACHE STRING "C++ compiler" FORCE)
+set(CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG} -O0")
+set(CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS_RELEASE} -O2")
+set(DEPENDENCY_WARNINGS "-w")
+set(PROJECT_WARNINGS
+	-Werror
+	-W -Wall -Wextra -Wshadow
+	-Wno-unused-result -Wno-unused-function -Wno-implicit-fallthrough)
+
+set(PROJECT_PROPERTIES
+	C_STANDARD 99
+	C_STANDARD_REQUIRED 99
+	C_EXTENSIONS OFF)
+
+if(UNIX)
+	set(PROJECT_PROPERTIES ${PROJECT_PROPERTIES} LINK_FLAGS "-Wl,-rpath,./")
+endif()
+
+
+###########################################################
+# PROJECT
+###########################################################
+set(PROJECT obolos)
+project(${PROJECT})
+
+set(BIN ${PROJECT})
+set(GAME game)
+
+
+###########################################################
+# DIRECTORIES
+###########################################################
+
+set(3RD_PARTY_DIR ${CMAKE_SOURCE_DIR}/code/3rd_party)
+set(SRC_DIR ${CMAKE_SOURCE_DIR}/code/src)
+set(ASSET_DIR ${CMAKE_SOURCE_DIR}/assets/processed)
+set(SHADER_DIR ${CMAKE_SOURCE_DIR}/code/shaders)
+set(SCRIPTS_DIR ${CMAKE_SOURCE_DIR}/tools/scripts)
+set(PACKAGE_DIR ${CMAKE_BINARY_DIR}/package)
+
+
+###########################################################
+# 3RD PARTY LIBRARIES
+###########################################################
+
+# glad
+add_subdirectory(${3RD_PARTY_DIR}/glad EXCLUDE_FROM_ALL)
+
+# SDL
+set(SDL_SHARED ON CACHE BOOL "" FORCE)
+set(SDL_STATIC OFF CACHE BOOL "" FORCE)
+add_subdirectory(${3RD_PARTY_DIR}/sdl-2.0.20 EXCLUDE_FROM_ALL)
+set_target_properties(SDL2 PROPERTIES COMPILE_FLAGS ${DEPENDENCY_WARNINGS})
+set_target_properties(SDL2main PROPERTIES COMPILE_FLAGS ${DEPENDENCY_WARNINGS})
+
+
+###########################################################
+# ASSETS
+###########################################################
+
+# Copy processed assets and shaders to build directory
+add_custom_target(
+	invalidate_assets ALL
+	COMMAND ${CMAKE_COMMAND} -E touch
+	${ASSET_DIR}
+	COMMAND ${CMAKE_COMMAND} -E touch
+	${SHADER_DIR})
+
+add_custom_command(
+	TARGET invalidate_assets POST_BUILD
+	COMMAND ${CMAKE_COMMAND} -E copy_directory ${ASSET_DIR}/ ${CMAKE_BINARY_DIR}
+	COMMAND ${CMAKE_COMMAND} -E copy_directory ${SHADER_DIR} ${CMAKE_BINARY_DIR}/shaders)
+
+
+###########################################################
+# TARGETS
+###########################################################
+
+add_executable(${BIN})
+add_library(${GAME} SHARED)
+
+
+###########################################################
+# BUILD CONFIGURATIONS
+###########################################################
+
+set(BIN_SRCS ${SRC_DIR}/main.c)
+set(GAME_SRCS ${SRC_DIR}/all.c)
+set(BIN_LIBS glad SDL2)
+set(GAME_LIBS glad SDL2)
+
+if(WIN32)
+	set(BIN_LIBS
+		${BIN_LIBS}
+		mingw32
+		SDL2main)
+endif()
+
+if (CMAKE_BUILD_TYPE STREQUAL "Release")
+	add_compile_definitions(BUILD_RELEASE)
+
+	set(GAME_SRCS ${GAME_SRCS} ${SRC_DIR}/engine/glsl.inc)
+
+	add_custom_command(
+		PRE_BUILD
+		OUTPUT ${SRC_DIR}/engine/glsl.inc
+		COMMAND
+		${SCRIPTS_DIR}/header_generator.sh
+		${SRC_DIR}/engine/glsl.inc # output
+		${SHADER_DIR}/geo.glsl     # input
+		${SHADER_DIR}/screen.glsl  # input
+		${SHADER_DIR}/text.glsl    # input
+		DEPENDS
+		${SHADER_DIR}/geo.glsl
+		${SHADER_DIR}/screen.glsl
+		${SHADER_DIR}/text.glsl)
+
+	add_custom_command(
+		TARGET ${GAME}
+		POST_BUILD
+		COMMAND ${CMAKE_COMMAND} -E rm ${SRC_DIR}/engine/glsl.inc)
+elseif(CMAKE_BUILD_TYPE STREQUAL "Debug")
+	add_compile_definitions(BUILD_DEBUG)
+
+	# Required for a valid language server compilation database to be generated with unity builds
+	if (CMAKE_EXPORT_COMPILE_COMMANDS)
+		file(GLOB GAME_SRCS
+			${SRC_DIR}/all.c
+			${SRC_DIR}/engine/*.c
+			${SRC_DIR}/game/*.c)
+
+		target_compile_options(
+			${GAME}
+			PRIVATE
+			-include ${SRC_DIR}/all.c)
+	endif()
+else()
+	message(FATAL_ERROR "No build configuration selected")
+endif()
+
+
+###########################################################
+# GAME LIBRARY
+###########################################################
+
+set_target_properties(${GAME} PROPERTIES ${PROJECT_PROPERTIES})
+
+target_sources(
+	${GAME}
+	PRIVATE
+	${GAME_SRCS})
+
+target_link_libraries(
+	${GAME}
+	PRIVATE
+	${GAME_LIBS})
+
+target_compile_options(
+	${GAME}
+	PRIVATE
+	${PROJECT_WARNINGS})
+
+
+###########################################################
+# EXECUTABLE
+###########################################################
+
+set_target_properties(${BIN} PROPERTIES ${PROJECT_PROPERTIES})
+
+target_sources(
+	${BIN}
+	PRIVATE
+	${BIN_SRCS})
+
+target_link_libraries(
+	${BIN}
+	PRIVATE
+	${BIN_LIBS})
+
+target_compile_options(
+	${BIN}
+	PRIVATE
+	${PROJECT_WARNINGS})
+
+add_custom_target(
+	run
+	COMMAND ${BIN}
+	DEPENDS ${BIN} ${GAME} ${ENGINE}
+	WORKING_DIRECTORY ${CMAKE_BINARY_DIR})
+
+
+###########################################################
+# INSTALL
+###########################################################
+
+install(
+	TARGETS ${BIN} ${GAME} ${ENGINE} ${BIN_LIBS} ${GAME_LIBS} ${ENGINE_LIBS}
+	CONFIGURATIONS Release
+	RUNTIME DESTINATION ${PACKAGE_DIR}
+	LIBRARY DESTINATION ${PACKAGE_DIR})
+
+install(
+	DIRECTORY ${ASSET_DIR}/
+	CONFIGURATIONS Release
+	DESTINATION ${PACKAGE_DIR})
+

code/3rd_party/glad/CMakeLists.txt

@@ -0,0 +1,8 @@
+cmake_minimum_required(VERSION 3.16)
+
+project(glad)
+
+add_library(glad SHARED)
+target_sources(glad PRIVATE src/gl.c)
+target_include_directories(glad PUBLIC include)
+

code/3rd_party/glad/include/KHR/khrplatform.h

@@ -0,0 +1,311 @@
+#ifndef __khrplatform_h_
+#define __khrplatform_h_
+
+/*
+** Copyright (c) 2008-2018 The Khronos Group Inc.
+**
+** Permission is hereby granted, free of charge, to any person obtaining a
+** copy of this software and/or associated documentation files (the
+** "Materials"), to deal in the Materials without restriction, including
+** without limitation the rights to use, copy, modify, merge, publish,
+** distribute, sublicense, and/or sell copies of the Materials, and to
+** permit persons to whom the Materials are furnished to do so, subject to
+** the following conditions:
+**
+** The above copyright notice and this permission notice shall be included
+** in all copies or substantial portions of the Materials.
+**
+** THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+** EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+** MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+** IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+** CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+** TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+** MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS.
+*/
+
+/* Khronos platform-specific types and definitions.
+ *
+ * The master copy of khrplatform.h is maintained in the Khronos EGL
+ * Registry repository at https://github.com/KhronosGroup/EGL-Registry
+ * The last semantic modification to khrplatform.h was at commit ID:
+ *      67a3e0864c2d75ea5287b9f3d2eb74a745936692
+ *
+ * Adopters may modify this file to suit their platform. Adopters are
+ * encouraged to submit platform specific modifications to the Khronos
+ * group so that they can be included in future versions of this file.
+ * Please submit changes by filing pull requests or issues on
+ * the EGL Registry repository linked above.
+ *
+ *
+ * See the Implementer's Guidelines for information about where this file
+ * should be located on your system and for more details of its use:
+ *    http://www.khronos.org/registry/implementers_guide.pdf
+ *
+ * This file should be included as
+ *        #include <KHR/khrplatform.h>
+ * by Khronos client API header files that use its types and defines.
+ *
+ * The types in khrplatform.h should only be used to define API-specific types.
+ *
+ * Types defined in khrplatform.h:
+ *    khronos_int8_t              signed   8  bit
+ *    khronos_uint8_t             unsigned 8  bit
+ *    khronos_int16_t             signed   16 bit
+ *    khronos_uint16_t            unsigned 16 bit
+ *    khronos_int32_t             signed   32 bit
+ *    khronos_uint32_t            unsigned 32 bit
+ *    khronos_int64_t             signed   64 bit
+ *    khronos_uint64_t            unsigned 64 bit
+ *    khronos_intptr_t            signed   same number of bits as a pointer
+ *    khronos_uintptr_t           unsigned same number of bits as a pointer
+ *    khronos_ssize_t             signed   size
+ *    khronos_usize_t             unsigned size
+ *    khronos_float_t             signed   32 bit floating point
+ *    khronos_time_ns_t           unsigned 64 bit time in nanoseconds
+ *    khronos_utime_nanoseconds_t unsigned time interval or absolute time in
+ *                                         nanoseconds
+ *    khronos_stime_nanoseconds_t signed time interval in nanoseconds
+ *    khronos_boolean_enum_t      enumerated boolean type. This should
+ *      only be used as a base type when a client API's boolean type is
+ *      an enum. Client APIs which use an integer or other type for
+ *      booleans cannot use this as the base type for their boolean.
+ *
+ * Tokens defined in khrplatform.h:
+ *
+ *    KHRONOS_FALSE, KHRONOS_TRUE Enumerated boolean false/true values.
+ *
+ *    KHRONOS_SUPPORT_INT64 is 1 if 64 bit integers are supported; otherwise 0.
+ *    KHRONOS_SUPPORT_FLOAT is 1 if floats are supported; otherwise 0.
+ *
+ * Calling convention macros defined in this file:
+ *    KHRONOS_APICALL
+ *    KHRONOS_APIENTRY
+ *    KHRONOS_APIATTRIBUTES
+ *
+ * These may be used in function prototypes as:
+ *
+ *      KHRONOS_APICALL void KHRONOS_APIENTRY funcname(
+ *                                  int arg1,
+ *                                  int arg2) KHRONOS_APIATTRIBUTES;
+ */
+
+#if defined(__SCITECH_SNAP__) && !defined(KHRONOS_STATIC)
+#   define KHRONOS_STATIC 1
+#endif
+
+/*-------------------------------------------------------------------------
+ * Definition of KHRONOS_APICALL
+ *-------------------------------------------------------------------------
+ * This precedes the return type of the function in the function prototype.
+ */
+#if defined(KHRONOS_STATIC)
+    /* If the preprocessor constant KHRONOS_STATIC is defined, make the
+     * header compatible with static linking. */
+#   define KHRONOS_APICALL
+#elif defined(_WIN32)
+#   define KHRONOS_APICALL __declspec(dllimport)
+#elif defined (__SYMBIAN32__)
+#   define KHRONOS_APICALL IMPORT_C
+#elif defined(__ANDROID__)
+#   define KHRONOS_APICALL __attribute__((visibility("default")))
+#else
+#   define KHRONOS_APICALL
+#endif
+
+/*-------------------------------------------------------------------------
+ * Definition of KHRONOS_APIENTRY
+ *-------------------------------------------------------------------------
+ * This follows the return type of the function  and precedes the function
+ * name in the function prototype.
+ */
+#if defined(_WIN32) && !defined(_WIN32_WCE) && !defined(__SCITECH_SNAP__)
+    /* Win32 but not WinCE */
+#   define KHRONOS_APIENTRY __stdcall
+#else
+#   define KHRONOS_APIENTRY
+#endif
+
+/*-------------------------------------------------------------------------
+ * Definition of KHRONOS_APIATTRIBUTES
+ *-------------------------------------------------------------------------
+ * This follows the closing parenthesis of the function prototype arguments.
+ */
+#if defined (__ARMCC_2__)
+#define KHRONOS_APIATTRIBUTES __softfp
+#else
+#define KHRONOS_APIATTRIBUTES
+#endif
+
+/*-------------------------------------------------------------------------
+ * basic type definitions
+ *-----------------------------------------------------------------------*/
+#if (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L) || defined(__GNUC__) || defined(__SCO__) || defined(__USLC__)
+
+
+/*
+ * Using <stdint.h>
+ */
+#include <stdint.h>
+typedef int32_t                 khronos_int32_t;
+typedef uint32_t                khronos_uint32_t;
+typedef int64_t                 khronos_int64_t;
+typedef uint64_t                khronos_uint64_t;
+#define KHRONOS_SUPPORT_INT64   1
+#define KHRONOS_SUPPORT_FLOAT   1
+/*
+ * To support platform where unsigned long cannot be used interchangeably with
+ * inptr_t (e.g. CHERI-extended ISAs), we can use the stdint.h intptr_t.
+ * Ideally, we could just use (u)intptr_t everywhere, but this could result in
+ * ABI breakage if khronos_uintptr_t is changed from unsigned long to
+ * unsigned long long or similar (this results in different C++ name mangling).
+ * To avoid changes for existing platforms, we restrict usage of intptr_t to
+ * platforms where the size of a pointer is larger than the size of long.
+ */
+#if defined(__SIZEOF_LONG__) && defined(__SIZEOF_POINTER__)
+#if __SIZEOF_POINTER__ > __SIZEOF_LONG__
+#define KHRONOS_USE_INTPTR_T
+#endif
+#endif
+
+#elif defined(__VMS ) || defined(__sgi)
+
+/*
+ * Using <inttypes.h>
+ */
+#include <inttypes.h>
+typedef int32_t                 khronos_int32_t;
+typedef uint32_t                khronos_uint32_t;
+typedef int64_t                 khronos_int64_t;
+typedef uint64_t                khronos_uint64_t;
+#define KHRONOS_SUPPORT_INT64   1
+#define KHRONOS_SUPPORT_FLOAT   1
+
+#elif defined(_WIN32) && !defined(__SCITECH_SNAP__)
+
+/*
+ * Win32
+ */
+typedef __int32                 khronos_int32_t;
+typedef unsigned __int32        khronos_uint32_t;
+typedef __int64                 khronos_int64_t;
+typedef unsigned __int64        khronos_uint64_t;
+#define KHRONOS_SUPPORT_INT64   1
+#define KHRONOS_SUPPORT_FLOAT   1
+
+#elif defined(__sun__) || defined(__digital__)
+
+/*
+ * Sun or Digital
+ */
+typedef int                     khronos_int32_t;
+typedef unsigned int            khronos_uint32_t;
+#if defined(__arch64__) || defined(_LP64)
+typedef long int                khronos_int64_t;
+typedef unsigned long int       khronos_uint64_t;
+#else
+typedef long long int           khronos_int64_t;
+typedef unsigned long long int  khronos_uint64_t;
+#endif /* __arch64__ */
+#define KHRONOS_SUPPORT_INT64   1
+#define KHRONOS_SUPPORT_FLOAT   1
+
+#elif 0
+
+/*
+ * Hypothetical platform with no float or int64 support
+ */
+typedef int                     khronos_int32_t;
+typedef unsigned int            khronos_uint32_t;
+#define KHRONOS_SUPPORT_INT64   0
+#define KHRONOS_SUPPORT_FLOAT   0
+
+#else
+
+/*
+ * Generic fallback
+ */
+#include <stdint.h>
+typedef int32_t                 khronos_int32_t;
+typedef uint32_t                khronos_uint32_t;
+typedef int64_t                 khronos_int64_t;
+typedef uint64_t                khronos_uint64_t;
+#define KHRONOS_SUPPORT_INT64   1
+#define KHRONOS_SUPPORT_FLOAT   1
+
+#endif
+
+
+/*
+ * Types that are (so far) the same on all platforms
+ */
+typedef signed   char          khronos_int8_t;
+typedef unsigned char          khronos_uint8_t;
+typedef signed   short int     khronos_int16_t;
+typedef unsigned short int     khronos_uint16_t;
+
+/*
+ * Types that differ between LLP64 and LP64 architectures - in LLP64,
+ * pointers are 64 bits, but 'long' is still 32 bits. Win64 appears
+ * to be the only LLP64 architecture in current use.
+ */
+#ifdef KHRONOS_USE_INTPTR_T
+typedef intptr_t               khronos_intptr_t;
+typedef uintptr_t              khronos_uintptr_t;
+#elif defined(_WIN64)
+typedef signed   long long int khronos_intptr_t;
+typedef unsigned long long int khronos_uintptr_t;
+#else
+typedef signed   long  int     khronos_intptr_t;
+typedef unsigned long  int     khronos_uintptr_t;
+#endif
+
+#if defined(_WIN64)
+typedef signed   long long int khronos_ssize_t;
+typedef unsigned long long int khronos_usize_t;
+#else
+typedef signed   long  int     khronos_ssize_t;
+typedef unsigned long  int     khronos_usize_t;
+#endif
+
+#if KHRONOS_SUPPORT_FLOAT
+/*
+ * Float type
+ */
+typedef          float         khronos_float_t;
+#endif
+
+#if KHRONOS_SUPPORT_INT64
+/* Time types
+ *
+ * These types can be used to represent a time interval in nanoseconds or
+ * an absolute Unadjusted System Time.  Unadjusted System Time is the number
+ * of nanoseconds since some arbitrary system event (e.g. since the last
+ * time the system booted).  The Unadjusted System Time is an unsigned
+ * 64 bit value that wraps back to 0 every 584 years.  Time intervals
+ * may be either signed or unsigned.
+ */
+typedef khronos_uint64_t       khronos_utime_nanoseconds_t;
+typedef khronos_int64_t        khronos_stime_nanoseconds_t;
+#endif
+
+/*
+ * Dummy value used to pad enum types to 32 bits.
+ */
+#ifndef KHRONOS_MAX_ENUM
+#define KHRONOS_MAX_ENUM 0x7FFFFFFF
+#endif
+
+/*
+ * Enumerated boolean type
+ *
+ * Values other than zero should be considered to be true.  Therefore
+ * comparisons should not be made against KHRONOS_TRUE.
+ */
+typedef enum {
+    KHRONOS_FALSE = 0,
+    KHRONOS_TRUE  = 1,
+    KHRONOS_BOOLEAN_ENUM_FORCE_SIZE = KHRONOS_MAX_ENUM
+} khronos_boolean_enum_t;
+
+#endif /* __khrplatform_h_ */

code/3rd_party/sdl-2.0.20/.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,7 @@
+<!--- Provide a general summary of your changes in the Title above -->
+
+## Description
+<!--- Describe your changes in detail -->
+
+## Existing Issue(s)
+<!--- If it fixes an open issue, please link to the issue here. -->

code/3rd_party/sdl-2.0.20/.github/workflows/android.yml

@@ -0,0 +1,14 @@
+name: Build (Android)
+
+on: [push, pull_request]
+
+jobs:
+  android:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: nttld/setup-ndk@v1
+        with:
+          ndk-version: r21e
+      - name: Build
+        run: ./build-scripts/androidbuildlibs.sh

code/3rd_party/sdl-2.0.20/.github/workflows/emscripten.yml

@@ -0,0 +1,16 @@
+name: Build (Emscripten)
+
+on: [push, pull_request]
+
+jobs:
+  emscripten:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: mymindstorm/setup-emsdk@v10
+        with:
+          version: 2.0.27
+      - name: Configure CMake
+        run: emcmake cmake -B build
+      - name: Build
+        run: cmake --build build/

code/3rd_party/sdl-2.0.20/.github/workflows/ios.yml

@@ -0,0 +1,20 @@
+name: Build (iOS/tvOS)
+
+on: [push, pull_request]
+
+jobs:
+  Build:
+    name: ${{ matrix.platform.name }}
+    runs-on: macos-latest
+
+    strategy:
+      fail-fast: false
+      matrix:
+        platform:
+        - { name: iOS, target: Static Library-iOS, sdk: iphoneos }
+        - { name: tvOS, target: Static Library-tvOS, sdk: appletvos }
+
+    steps:
+      - uses: actions/checkout@v2
+      - name: Build
+        run: xcodebuild -project Xcode/SDL/SDL.xcodeproj -target '${{ matrix.platform.target }}' -configuration Release -sdk ${{ matrix.platform.sdk }} clean build

code/3rd_party/sdl-2.0.20/.github/workflows/main.yml

@@ -0,0 +1,88 @@
+name: Build
+
+on: [push, pull_request]
+
+jobs:
+  Build:
+    name: ${{ matrix.platform.name }}
+    runs-on: ${{ matrix.platform.os }}
+
+    defaults:
+      run:
+        shell: ${{ matrix.platform.shell }}
+
+    strategy:
+      fail-fast: false
+      matrix:
+        platform:
+        - { name: Windows (x64),          os: windows-latest, shell: pwsh, flags: -A x64 }
+        - { name: Windows (x86),          os: windows-latest, shell: pwsh, flags: -A Win32 }
+        - { name: Windows (clang-cl x64), os: windows-latest, shell: pwsh, flags: -T ClangCL -A x64 }
+        - { name: Windows (clang-cl x86), os: windows-latest, shell: pwsh, flags: -T ClangCL -A Win32 }
+        - { name: Windows (ARM64),        os: windows-latest, shell: pwsh, flags: -A ARM64 }
+        - { name: Windows (mingw32),      os: windows-latest, shell: 'msys2 {0}', msystem: mingw32, msys-env: mingw-w64-i686 }
+        - { name: Windows (mingw64),      os: windows-latest, shell: 'msys2 {0}', msystem: mingw64, msys-env: mingw-w64-x86_64 }
+        - { name: Linux,                  os: ubuntu-20.04,   shell: sh,   flags: -GNinja }
+        - { name: MacOS,                  os: macos-latest,   shell: sh }
+
+    steps:
+    - name: Set up MSYS2
+      if: matrix.platform.shell == 'msys2 {0}'
+      uses: msys2/setup-msys2@v2
+      with:
+        msystem: ${{ matrix.platform.msystem }}
+        install: >-
+          ${{ matrix.platform.msys-env }}-gcc
+          ${{ matrix.platform.msys-env }}-cmake
+          ${{ matrix.platform.msys-env }}-ninja
+          ${{ matrix.platform.msys-env }}-pkg-config
+
+    - name: Setup Linux dependencies
+      if: runner.os == 'Linux'
+      run: |
+        sudo apt-get update
+        sudo apt-get install wayland-protocols \
+          pkg-config \
+          ninja-build \
+          libasound2-dev \
+          libdbus-1-dev \
+          libegl1-mesa-dev \
+          libgl1-mesa-dev \
+          libgles2-mesa-dev \
+          libglu1-mesa-dev \
+          libibus-1.0-dev \
+          libpulse-dev \
+          libsdl2-2.0-0 \
+          libsndio-dev \
+          libudev-dev \
+          libwayland-dev \
+          libwayland-client++0 \
+          wayland-scanner++ \
+          libwayland-cursor++0 \
+          libx11-dev \
+          libxcursor-dev \
+          libxext-dev \
+          libxi-dev \
+          libxinerama-dev \
+          libxkbcommon-dev \
+          libxrandr-dev \
+          libxss-dev \
+          libxt-dev \
+          libxv-dev \
+          libxxf86vm-dev \
+          libdrm-dev \
+          libgbm-dev\
+          libpulse-dev \
+          libpango1.0-dev
+        sudo apt install meson
+        git clone --depth 1 https://gitlab.gnome.org/jadahl/libdecor.git --branch 0.1.0
+        cd libdecor
+        meson build --buildtype release -Ddemo=false -Ddbus=disabled
+        ninja -C build
+        sudo meson install -C build
+    - uses: actions/checkout@v2
+    - name: Configure CMake
+      run: cmake -B build -DSDL_TEST=ON ${{ matrix.platform.flags }}
+    - name: Build
+      run: cmake --build build/
+

code/3rd_party/sdl-2.0.20/.github/workflows/os2.yml

@@ -0,0 +1,26 @@
+name: Build (OS/2)
+
+on: [push, pull_request]
+
+jobs:
+  os2:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Cache OpenWatcom
+        uses: actions/cache@v2
+        env:
+          cache-name: cache-openwatcom
+        with:
+          path: ~/openwatcom
+          key: ${{ runner.os }}-build-${{ env.cache-name }}
+
+      - name: Download OpenWatcom if not cached
+        run: if [ ! -d ~/openwatcom/binl64 ]; then wget --no-verbose 'https://github.com/open-watcom/open-watcom-v2/releases/download/Current-build/open-watcom-2_0-c-linux-x64' -O ~/ow.zip && mkdir -p ~/openwatcom && cd ~/openwatcom && unzip ~/ow.zip && chmod -R a+rx ~/openwatcom ; fi
+        shell: bash
+
+      - name: Build
+        run: WATCOM="$HOME/openwatcom" build-scripts/os2-buildbot.sh
+        shell: bash         
+

code/3rd_party/sdl-2.0.20/.github/workflows/psp.yaml

@@ -0,0 +1,18 @@
+name: Build (Sony Playstation Portable)
+
+on: [push, pull_request]
+
+jobs:
+  psp:
+    runs-on: ubuntu-latest
+    container: pspdev/pspdev:latest
+    steps:
+    - uses: actions/checkout@v2
+    - name: Setup dependencies
+      run: |
+        apk update 
+        apk add cmake gmp mpc1 mpfr4 make
+    - name: Configure CMake
+      run: cmake -S. -Bbuild -DCMAKE_BUILD_TYPE=Release -DCMAKE_TOOLCHAIN_FILE=$PSPDEV/psp/share/pspdev.cmake -DSDL_TEST=ON
+    - name: Build
+      run: cmake --build build

code/3rd_party/sdl-2.0.20/.github/workflows/riscos.yml

@@ -0,0 +1,28 @@
+name: Build (RISC OS)
+
+on: [push, pull_request]
+
+jobs:
+  autotools:
+    name: autotools
+    runs-on: ubuntu-latest
+    container: riscosdotinfo/riscos-gccsdk-4.7:latest
+    steps:
+    - uses: actions/checkout@v2
+    - name: Configure
+      run: ./configure --host=arm-unknown-riscos --disable-gcc-atomics
+    - name: Build
+      run: make -j`nproc`
+
+  cmake:
+    name: CMake
+    runs-on: ubuntu-latest
+    container: riscosdotinfo/riscos-gccsdk-4.7:latest
+    steps:
+    - name: Setup dependencies
+      run: apt-get update && apt-get install -y cmake ninja-build
+    - uses: actions/checkout@v2
+    - name: Configure CMake
+      run: cmake -S. -Bbuild -G Ninja -DCMAKE_TOOLCHAIN_FILE=/home/riscos/env/toolchain-riscos.cmake -DRISCOS=ON -DSDL_GCC_ATOMICS=OFF -DCMAKE_BUILD_TYPE=Release
+    - name: Build
+      run: cmake --build build

code/3rd_party/sdl-2.0.20/.github/workflows/vita.yaml

@@ -0,0 +1,23 @@
+name: Build (Sony Playstation Vita)
+
+on: [push, pull_request]
+
+defaults:
+  run:
+    shell: sh
+
+jobs:
+  vita:
+    runs-on: ubuntu-latest
+    container: 
+      image: vitasdk/vitasdk:latest
+    steps:
+    - uses: actions/checkout@v2
+    - name: Install CMake and GNU Make
+      run: |
+        apk update 
+        apk add cmake make
+    - name: Configure CMake
+      run: cmake -S. -Bbuild -DCMAKE_TOOLCHAIN_FILE=${VITASDK}/share/vita.toolchain.cmake -DCMAKE_BUILD_TYPE=Release
+    - name: Build
+      run: cmake --build build

code/3rd_party/sdl-2.0.20/.gitignore

@@ -0,0 +1,178 @@
+aclocal.m4
+autom4te*
+config.cache
+config.log
+config.status
+libtool
+Makefile
+Makefile.rules
+sdl2-config
+sdl2-config.cmake
+sdl2-config-version.cmake
+sdl2.pc
+SDL2.spec
+build
+gen
+Build
+buildbot
+
+*.so
+*.so.*
+*.dll
+*.exe
+*.o
+*.obj
+*.lib
+*.a
+*.la
+*.dSYM
+*,e1f
+*,ff8
+*.lnk
+*.err
+*.exp
+*.map
+*.orig
+*~
+*.swp
+*.tmp
+*.rej
+
+# for CMake
+CMakeFiles/
+CMakeCache.txt
+cmake_install.cmake
+cmake_uninstall.cmake
+SDL2ConfigVersion.cmake
+.ninja_*
+*.ninja
+
+# for CLion
+.idea
+cmake-build-*
+
+# for Xcode
+*.mode1*
+*.perspective*
+*.pbxuser
+(^|/)build($|/)
+.DS_Store
+xcuserdata
+*.xcworkspace
+
+# for Visual C++
+.vs
+Debug
+Release
+*.user
+*.ncb
+*.suo
+*.sdf
+VisualC/tests/controllermap/axis.bmp
+VisualC/tests/controllermap/button.bmp
+VisualC/tests/controllermap/controllermap.bmp
+VisualC/tests/controllermap/controllermap_back.bmp
+VisualC/tests/loopwave/sample.wav
+VisualC/tests/testautomation/CompareSurfaces0001_Reference.bmp
+VisualC/tests/testautomation/CompareSurfaces0001_TestOutput.bmp
+VisualC/tests/testgamecontroller/axis.bmp
+VisualC/tests/testgamecontroller/button.bmp
+VisualC/tests/testgamecontroller/controllermap.bmp
+VisualC/tests/testgamecontroller/controllermap_back.bmp
+VisualC/tests/testoverlay2/moose.dat
+VisualC/tests/testrendertarget/icon.bmp
+VisualC/tests/testrendertarget/sample.bmp
+VisualC/tests/testscale/icon.bmp
+VisualC/tests/testscale/sample.bmp
+VisualC/tests/testsprite2/icon.bmp
+VisualC/tests/testyuv/testyuv.bmp
+VisualC/visualtest/icon.bmp
+VisualC/visualtest/testquit.actions
+VisualC/visualtest/testquit.config
+VisualC/visualtest/testquit.exe
+VisualC/visualtest/testquit.parameters
+VisualC/visualtest/testsprite2.exe
+VisualC/visualtest/testsprite2_sample.actions
+VisualC/visualtest/testsprite2_sample.config
+VisualC/visualtest/testsprite2_sample.parameters
+
+# for Android
+android-project/local.properties
+
+test/checkkeys
+test/checkkeysthreads
+test/controllermap
+test/loopwave
+test/loopwavequeue
+test/testatomic
+test/testaudiocapture
+test/testaudiohotplug
+test/testaudioinfo
+test/testautomation
+test/testbounds
+test/testcustomcursor
+test/testdisplayinfo
+test/testdraw2
+test/testdrawchessboard
+test/testdropfile
+test/testerror
+test/testevdev
+test/testfile
+test/testfilesystem
+test/testgamecontroller
+test/testgeometry
+test/testgesture
+test/testgl2
+test/testgles
+test/testgles2
+test/testhaptic
+test/testhittesting
+test/testhotplug
+test/testiconv
+test/testime
+test/testintersections
+test/testjoystick
+test/testkeys
+test/testloadso
+test/testlocale
+test/testlock
+test/testmessage
+test/testmouse
+test/testmultiaudio
+test/testnative
+test/testoverlay2
+test/testplatform
+test/testpower
+test/testqsort
+test/testrelative
+test/testrendercopyex
+test/testrendertarget
+test/testresample
+test/testrumble
+test/testscale
+test/testsem
+test/testsensor
+test/testshader
+test/testshape
+test/testsprite2
+test/testspriteminimal
+test/teststreaming
+test/testsurround
+test/testthread
+test/testtimer
+test/testurl
+test/testver
+test/testviewport
+test/testvulkan
+test/testwm2
+test/testyuv
+test/torturethread
+
+builddir/
+debian/*.debhelper.log
+debian/*.substvars
+debian/*.tar.gz
+debian/.debhelper/
+debian/files
+debian/libsdl*/
+debian/tmp/

code/3rd_party/sdl-2.0.20/Android.mk

@@ -0,0 +1,123 @@
+LOCAL_PATH := $(call my-dir)
+
+###########################
+#
+# SDL shared library
+#
+###########################
+
+include $(CLEAR_VARS)
+
+LOCAL_MODULE := SDL2
+
+LOCAL_C_INCLUDES := $(LOCAL_PATH)/include
+
+LOCAL_EXPORT_C_INCLUDES := $(LOCAL_C_INCLUDES)
+
+LOCAL_SRC_FILES := \
+	$(subst $(LOCAL_PATH)/,, \
+	$(wildcard $(LOCAL_PATH)/src/*.c) \
+	$(wildcard $(LOCAL_PATH)/src/audio/*.c) \
+	$(wildcard $(LOCAL_PATH)/src/audio/android/*.c) \
+	$(wildcard $(LOCAL_PATH)/src/audio/dummy/*.c) \
+	$(wildcard $(LOCAL_PATH)/src/audio/aaudio/*.c) \
+	$(wildcard $(LOCAL_PATH)/src/audio/openslES/*.c) \
+	$(LOCAL_PATH)/src/atomic/SDL_atomic.c.arm \
+	$(LOCAL_PATH)/src/atomic/SDL_spinlock.c.arm \
+	$(wildcard $(LOCAL_PATH)/src/core/android/*.c) \
+	$(wildcard $(LOCAL_PATH)/src/cpuinfo/*.c) \
+	$(wildcard $(LOCAL_PATH)/src/dynapi/*.c) \
+	$(wildcard $(LOCAL_PATH)/src/events/*.c) \
+	$(wildcard $(LOCAL_PATH)/src/file/*.c) \
+	$(wildcard $(LOCAL_PATH)/src/haptic/*.c) \
+	$(wildcard $(LOCAL_PATH)/src/haptic/android/*.c) \
+	$(wildcard $(LOCAL_PATH)/src/hidapi/*.c) \
+	$(wildcard $(LOCAL_PATH)/src/hidapi/android/*.cpp) \
+	$(wildcard $(LOCAL_PATH)/src/joystick/*.c) \
+	$(wildcard $(LOCAL_PATH)/src/joystick/android/*.c) \
+	$(wildcard $(LOCAL_PATH)/src/joystick/hidapi/*.c) \
+	$(wildcard $(LOCAL_PATH)/src/joystick/virtual/*.c) \
+	$(wildcard $(LOCAL_PATH)/src/loadso/dlopen/*.c) \
+	$(wildcard $(LOCAL_PATH)/src/locale/*.c) \
+	$(wildcard $(LOCAL_PATH)/src/locale/android/*.c) \
+	$(wildcard $(LOCAL_PATH)/src/misc/*.c) \
+	$(wildcard $(LOCAL_PATH)/src/misc/android/*.c) \
+	$(wildcard $(LOCAL_PATH)/src/power/*.c) \
+	$(wildcard $(LOCAL_PATH)/src/power/android/*.c) \
+	$(wildcard $(LOCAL_PATH)/src/filesystem/android/*.c) \
+	$(wildcard $(LOCAL_PATH)/src/sensor/*.c) \
+	$(wildcard $(LOCAL_PATH)/src/sensor/android/*.c) \
+	$(wildcard $(LOCAL_PATH)/src/render/*.c) \
+	$(wildcard $(LOCAL_PATH)/src/render/*/*.c) \
+	$(wildcard $(LOCAL_PATH)/src/stdlib/*.c) \
+	$(wildcard $(LOCAL_PATH)/src/thread/*.c) \
+	$(wildcard $(LOCAL_PATH)/src/thread/pthread/*.c) \
+	$(wildcard $(LOCAL_PATH)/src/timer/*.c) \
+	$(wildcard $(LOCAL_PATH)/src/timer/unix/*.c) \
+	$(wildcard $(LOCAL_PATH)/src/video/*.c) \
+	$(wildcard $(LOCAL_PATH)/src/video/android/*.c) \
+	$(wildcard $(LOCAL_PATH)/src/video/yuv2rgb/*.c) \
+	$(wildcard $(LOCAL_PATH)/src/test/*.c))
+
+LOCAL_CFLAGS += -DGL_GLEXT_PROTOTYPES
+LOCAL_CFLAGS += \
+	-Wall -Wextra \
+	-Wdocumentation \
+	-Wdocumentation-unknown-command \
+	-Wmissing-prototypes \
+	-Wunreachable-code-break \
+	-Wunneeded-internal-declaration \
+	-Wmissing-variable-declarations \
+	-Wfloat-conversion \
+	-Wshorten-64-to-32 \
+	-Wunreachable-code-return \
+	-Wshift-sign-overflow \
+	-Wstrict-prototypes \
+	-Wkeyword-macro \
+
+
+# Warnings we haven't fixed (yet)
+LOCAL_CFLAGS += -Wno-unused-parameter -Wno-sign-compare
+
+LOCAL_LDLIBS := -ldl -lGLESv1_CM -lGLESv2 -lOpenSLES -llog -landroid
+
+ifeq ($(NDK_DEBUG),1)
+    cmd-strip :=
+endif
+
+LOCAL_STATIC_LIBRARIES := cpufeatures
+
+include $(BUILD_SHARED_LIBRARY)
+
+###########################
+#
+# SDL static library
+#
+###########################
+
+LOCAL_MODULE := SDL2_static
+
+LOCAL_MODULE_FILENAME := libSDL2
+
+LOCAL_LDLIBS := 
+LOCAL_EXPORT_LDLIBS := -ldl -lGLESv1_CM -lGLESv2 -llog -landroid
+
+include $(BUILD_STATIC_LIBRARY)
+
+###########################
+#
+# SDL main static library
+#
+###########################
+
+include $(CLEAR_VARS)
+
+LOCAL_C_INCLUDES := $(LOCAL_PATH)/include
+
+LOCAL_MODULE := SDL2_main
+
+LOCAL_MODULE_FILENAME := libSDL2main
+
+include $(BUILD_STATIC_LIBRARY)
+
+$(call import-module,android/cpufeatures)

code/3rd_party/sdl-2.0.20/BUGS.txt

@@ -0,0 +1,16 @@
+
+Bugs are now managed in the SDL issue tracker, here:
+
+    https://github.com/libsdl-org/SDL/issues
+
+You may report bugs there, and search to see if a given issue has already
+ been reported, discussed, and maybe even fixed.
+
+
+You may also find help at the SDL forums/mailing list:
+
+    https://discourse.libsdl.org/
+
+Bug reports are welcome here, but we really appreciate if you use the issue
+ tracker, as bugs discussed on the mailing list may be forgotten or missed.
+

code/3rd_party/sdl-2.0.20/CREDITS.txt

@@ -0,0 +1,53 @@
+
+Simple DirectMedia Layer CREDITS
+Thanks to everyone who made this possible, including:
+
+* Cliff Matthews, for giving me a reason to start this project. :)
+ -- Executor rocks!  *grin*
+
+* Ryan Gordon for helping everybody out and keeping the dream alive. :)
+
+* Gabriel Jacobo for his work on the Android port and generally helping out all around.
+ 
+* Philipp Wiesemann for his attention to detail reviewing the entire SDL code base and proposes patches.
+
+* Andreas Schiffler for his dedication to unit tests, Visual Studio projects, and managing the Google Summer of Code.
+
+* Mike Sartain for incorporating SDL into Team Fortress 2 and cheering me on at Valve.
+
+* Alfred Reynolds for the game controller API and general (in)sanity
+
+* Jørgen Tjernø for numerous magical Mac OS X fixes.
+
+* Pierre-Loup Griffais for his deep knowledge of OpenGL drivers.
+ 
+* Julian Winter for the SDL 2.0 website.
+
+* Sheena Smith for many months of great work on the SDL wiki creating the API documentation and style guides.
+
+* Paul Hunkin for his port of SDL to Android during the Google Summer of Code 2010.
+
+* Eli Gottlieb for his work on shaped windows during the Google Summer of Code 2010.
+
+* Jim Grandpre for his work on multi-touch and gesture recognition during
+  the Google Summer of Code 2010.
+
+* Edgar "bobbens" Simo for his force feedback API development during the
+  Google Summer of Code 2008.
+
+* Aaron Wishnick for his work on audio resampling and pitch shifting during
+  the Google Summer of Code 2008.
+
+* Holmes Futrell for his port of SDL to the iPhone and iPod Touch during the
+  Google Summer of Code 2008.
+
+* Jon Atkins for SDL_image, SDL_mixer and SDL_net documentation.
+
+* Everybody at Loki Software, Inc. for their great contributions!
+
+ And a big hand to everyone else who has contributed over the years.
+
+THANKS! :)
+
+  -- Sam Lantinga			<slouken@libsdl.org>
+

code/3rd_party/sdl-2.0.20/INSTALL.txt

@@ -0,0 +1,41 @@
+
+To compile and install SDL:
+
+    1.  Windows with Visual Studio:
+        * Read ./docs/README-visualc.md
+
+        Windows with gcc, either native or cross-compiling:
+        * Read the FAQ at https://wiki.libsdl.org/FAQWindows
+        * Run './configure; make; make install'
+
+        Mac OS X with Xcode:
+        * Read docs/README-macosx.md
+
+        Mac OS X from the command line:
+        * Run './configure; make; make install'
+
+        Linux and other UNIX systems:
+        * Run './configure; make; make install'
+
+        Android:
+        * Read docs/README-android.md
+
+        iOS:
+        * Read docs/README-ios.md
+
+        Using Cmake:
+        * Read docs/README-cmake.md
+
+    2.  Look at the example programs in ./test, and check out the online
+        documentation at https://wiki.libsdl.org/
+
+    3.  Join the SDL developer discussions, sign up on 
+        https://discourse.libsdl.org/
+        and go to the development forum
+        https://discourse.libsdl.org/c/sdl-development/6
+
+    4.  Sign up for the announcement list through the web interface:
+        https://www.libsdl.org/mailing-list.php
+
+That's it!
+Sam Lantinga <slouken@libsdl.org>

code/3rd_party/sdl-2.0.20/LICENSE.txt

@@ -0,0 +1,18 @@
+Copyright (C) 1997-2022 Sam Lantinga <slouken@libsdl.org>
+  
+This software is provided 'as-is', without any express or implied
+warranty.  In no event will the authors be held liable for any damages
+arising from the use of this software.
+
+Permission is granted to anyone to use this software for any purpose,
+including commercial applications, and to alter it and redistribute it
+freely, subject to the following restrictions:
+  
+1. The origin of this software must not be misrepresented; you must not
+   claim that you wrote the original software. If you use this software
+   in a product, an acknowledgment in the product documentation would be
+   appreciated but is not required. 
+2. Altered source versions must be plainly marked as such, and must not be
+   misrepresented as being the original software.
+3. This notice may not be removed or altered from any source distribution.
+

code/3rd_party/sdl-2.0.20/Makefile.in

@@ -0,0 +1,258 @@
+# Makefile to build and install the SDL library
+
+top_builddir = .
+srcdir  = @srcdir@
+objects = build
+gen = gen
+prefix = @prefix@
+exec_prefix =