handle custom platform

CMakeLists.txt

@@ -1,4 +1,13 @@
 cmake_minimum_required(VERSION 3.0)
+
+# Directory for easier includes
+# Anywhere you see include(...) you can check <root>/cmake for that file
+set(CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/cmake)
+
+include(CustomPlatform)
+
+custom_platform_include_if_exists("raylibPlatformCustomProjectConfig")
+
 project(raylib)
 
 # Avoid excessive expansion of variables in conditionals. In particular, if
@@ -18,9 +27,6 @@ cmake_policy(SET CMP0054 NEW)
 # See https://cmake.org/cmake/help/latest/policy/CMP0063.html
 cmake_policy(SET CMP0063 NEW)
 
-# Directory for easier includes
-# Anywhere you see include(...) you can check <root>/cmake for that file
-set(CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/cmake)
 
 # RAYLIB_IS_MAIN determines whether the project is being used from root
 # or if it is added as a dependency (through add_subdirectory for example).

CMakeOptions.txt

@@ -2,7 +2,7 @@
 include(CMakeDependentOption)
 include(EnumOption)
 
-enum_option(PLATFORM "Desktop;Web;Android;Raspberry Pi;DRM" "Platform to build for.")
+enum_option(PLATFORM "Desktop;Web;Android;Raspberry Pi;DRM;Custom" "Platform to build for.")
 
 enum_option(OPENGL_VERSION "OFF;4.3;3.3;2.1;1.1;ES 2.0;ES 3.0" "Force a specific OpenGL Version?")
 

cmake/BuildOptions.cmake

@@ -11,7 +11,7 @@ endif()
 # This helps support the case where emsdk toolchain file is used
 # either by setting it with -DCMAKE_TOOLCHAIN_FILE=<path_to_emsdk>/upstream/emscripten/cmake/Modules/Platform/Emscripten.cmake
 # or by using "emcmake cmake -B build -S ." as described in https://emscripten.org/docs/compiling/Building-Projects.html
-if(EMSCRIPTEN)
+if(EMSCRIPTEN AND NOT ${PLATFORM} MATCHES "Custom")
     SET(PLATFORM Web CACHE STRING "Forcing PLATFORM_WEB because EMSCRIPTEN was detected")
 endif()
 

cmake/CompileDefinitions.cmake

@@ -2,6 +2,11 @@
 target_compile_definitions("raylib" PUBLIC "${PLATFORM_CPP}")
 target_compile_definitions("raylib" PUBLIC "${GRAPHICS}")
 
+if("${PLATFORM}" MATCHES "Custom")
+  target_compile_definitions("raylib" PUBLIC "PLATFORM_CUSTOM_DEFINES=\"${PLATFORM_CUSTOM_DEFINES}\"")
+  target_compile_definitions("raylib" PUBLIC "PLATFORM_CUSTOM_RCORE_IMPL=\"${PLATFORM_CUSTOM_RCORE_IMPL}\"")
+endif()
+
 function(define_if target variable)
     if (${${variable}})
         message(STATUS "${variable}=${${variable}}")

cmake/CustomPlatform.cmake

@@ -0,0 +1,9 @@
+macro(custom_platform_include_if_exists file)
+  if("${PLATFORM}" MATCHES "Custom")
+    if (EXISTS "${PLATFORM_CUSTOM_ROOT_DIR}/cmake/${file}.cmake")
+      include("${PLATFORM_CUSTOM_ROOT_DIR}/cmake/${file}.cmake")
+    else ()
+      message(STATUS "No file ${PLATFORM_CUSTOM_ROOT_DIR}/cmake/${file}.cmake detected... skipped")
+    endif ()
+  endif()
+endmacro()

cmake/LibraryConfigurations.cmake

@@ -91,6 +91,8 @@ elseif ("${PLATFORM}" MATCHES "DRM")
     endif ()
     set(LIBS_PRIVATE ${GLESV2} ${EGL} ${DRM} ${GBM} atomic pthread m dl)
 
+elseif ("${PLATFORM}" MATCHES "Custom")
+  set(PLATFORM_CPP "PLATFORM_CUSTOM")
 endif ()
 
 if (NOT ${OPENGL_VERSION} MATCHES "OFF")

external/README.md

@@ -0,0 +1,26 @@
+For the sake of this PR, this folder was added to demonstrate what a custom platform look like as well
+as how to use a custom platform
+
+* `custom_platforms/custom_platform_1`: clone of the web platform
+* `custom_platforms/custom_platform_2`: clone of the desktop platform
+
+
+* `examples/example_for_custom_platform_1`: example using the custom_platform_1
+
+  How to build (use emscripten since it is a web platform: make sure you use the proper locations)
+    ```text
+    mkdir build
+    cd build
+    cmake -DCMAKE_TOOLCHAIN_FILE=/usr/local/emsdk/upstream/emscripten/cmake/Modules/Platform/Emscripten.cmake -DEMSDK=/usr/local/emsdk -DPLATFORM=Custom -DCMAKE_BUILD_TYPE=Debug ..
+    cmake --build . --target example_for_custom_platform_1
+    ```
+
+* `examples/example_for_custom_platform_2`: example using the custom_platform_2
+
+  How to build:
+    ```text
+    mkdir build
+    cd build
+    cmake -DPLATFORM=Custom -DCMAKE_BUILD_TYPE=Debug ..
+    cmake --build . --target example_for_custom_platform_2
+    ```

external/custom_platforms/custom_platform_1/cmake/raylibPlatformCustomLibraryConfig.cmake

@@ -0,0 +1,5 @@
+message(STATUS "From raylibPlatformCustomLibraryConfig (Custom platform 1 (Web)")
+
+set(GRAPHICS "GRAPHICS_API_OPENGL_ES2")
+set(CMAKE_LD_FLAGS "${CMAKE_LD_FLAGS} -s USE_GLFW=3 -s ASSERTIONS=1 --profiling")
+set(CMAKE_STATIC_LIBRARY_SUFFIX ".a")

external/custom_platforms/custom_platform_1/cmake/raylibPlatformCustomTargetConfig.cmake

@@ -0,0 +1,3 @@
+message(STATUS "From raylibPlatformCustomTargetConfig (Custom platform 1 (Web)")
+
+target_link_options(raylib PRIVATE "-sUSE_GLFW=3")

external/custom_platforms/custom_platform_1/src/raylib_platform_custom.h

@@ -0,0 +1,36 @@
+/*******************************************************************************************
+*   raylib_platform_custom.h
+*
+*   Custom Platform definition file
+*
+*   LICENSE: zlib/libpng
+*
+*   Copyright (c) 2023 Yan Pujante
+*
+*   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.
+*
+**********************************************************************************************/
+
+#ifndef RAYLIB_PLATFORM_CUSTOM_H
+#define RAYLIB_PLATFORM_CUSTOM_H
+
+#define PLATFORM_CUSTOM_ID "platform_custom_1"
+#define PLATFORM_CUSTOM_BACKEND "Platform backend: Custom Platform 1 (Web clone)"
+#define PLATFORM_CUSTOM_CLOCK_MONOTONIC
+// #define PLATFORM_CUSTOM_DISABLE_HI_RES_TIMER
+// #define PLATFORM_CUSTOM_ENABLE_OPENGL_ES2
+
+#endif //RAYLIB_PLATFORM_CUSTOM_H

external/custom_platforms/custom_platform_2/cmake/raylibPlatformCustomLibraryConfig.cmake

@@ -0,0 +1,70 @@
+message(STATUS "From aylibPlatformCustomLibraryConfig (Custom platform 2 (Desktop)")
+
+if (APPLE)
+  # Need to force OpenGL 3.3 on OS X
+  # See: https://github.com/raysan5/raylib/issues/341
+  set(GRAPHICS "GRAPHICS_API_OPENGL_33")
+  find_library(OPENGL_LIBRARY OpenGL)
+  set(LIBS_PRIVATE ${OPENGL_LIBRARY})
+  link_libraries("${LIBS_PRIVATE}")
+  if (NOT CMAKE_SYSTEM STRLESS "Darwin-18.0.0")
+    add_definitions(-DGL_SILENCE_DEPRECATION)
+    MESSAGE(AUTHOR_WARNING "OpenGL is deprecated starting with macOS 10.14 (Mojave)!")
+  endif ()
+elseif (WIN32)
+  add_definitions(-D_CRT_SECURE_NO_WARNINGS)
+  find_package(OpenGL QUIET)
+  set(LIBS_PRIVATE ${OPENGL_LIBRARIES} winmm)
+elseif (UNIX)
+  find_library(pthread NAMES pthread)
+  find_package(OpenGL QUIET)
+  if ("${OPENGL_LIBRARIES}" STREQUAL "")
+    set(OPENGL_LIBRARIES "GL")
+  endif ()
+
+  if ("${CMAKE_SYSTEM_NAME}" MATCHES "(Net|Open)BSD")
+    find_library(OSS_LIBRARY ossaudio)
+  endif ()
+
+  set(LIBS_PRIVATE m pthread ${OPENGL_LIBRARIES} ${OSS_LIBRARY})
+else ()
+  find_library(pthread NAMES pthread)
+  find_package(OpenGL QUIET)
+  if ("${OPENGL_LIBRARIES}" STREQUAL "")
+    set(OPENGL_LIBRARIES "GL")
+  endif ()
+
+  set(LIBS_PRIVATE m atomic pthread ${OPENGL_LIBRARIES} ${OSS_LIBRARY})
+
+  if ("${CMAKE_SYSTEM_NAME}" MATCHES "(Net|Open)BSD")
+    find_library(OSS_LIBRARY ossaudio)
+    set(LIBS_PRIVATE m pthread ${OPENGL_LIBRARIES} ${OSS_LIBRARY})
+  endif ()
+
+  if (NOT "${CMAKE_SYSTEM_NAME}" MATCHES "(Net|Open)BSD" AND USE_AUDIO)
+    set(LIBS_PRIVATE ${LIBS_PRIVATE} dl)
+  endif ()
+endif ()
+
+if("${GLFW_ROOT_DIR}" STREQUAL "")
+  message(FATAL_ERROR "This platform requires glfw. Provide its location via GLFW_ROOT_DIR")
+endif()
+
+message(STATUS "Using glfw from ${GLFW_ROOT_DIR}")
+set(GLFW_BUILD_DOCS OFF CACHE BOOL "" FORCE)
+set(GLFW_BUILD_TESTS OFF CACHE BOOL "" FORCE)
+set(GLFW_BUILD_EXAMPLES OFF CACHE BOOL "" FORCE)
+set(GLFW_INSTALL OFF CACHE BOOL "" FORCE)
+set(GLFW_USE_WAYLAND ${USE_WAYLAND} CACHE BOOL "" FORCE)
+set(GLFW_LIBRARY_TYPE "STATIC" CACHE STRING "" FORCE)
+
+add_subdirectory("${GLFW_ROOT_DIR}")
+
+# Hide glfw's symbols when building a shared lib
+if (BUILD_SHARED_LIBS)
+  set_property(TARGET glfw PROPERTY C_VISIBILITY_PRESET hidden)
+endif()
+
+include_directories(BEFORE SYSTEM "${GLFW_ROOT_DIR}/include")
+
+set(LIBS_PRIVATE ${LIBS_PRIVATE} glfw)

external/custom_platforms/custom_platform_2/cmake/raylibPlatformCustomProjectConfig.cmake

@@ -0,0 +1,12 @@
+message(STATUS "From raylibPlatformCustomProjectConfig (Custom platform 2 (Desktop)")
+
+# Note that changing CMAKE_OSX_ARCHITECTURES should be done BEFORE project()
+if(APPLE)
+  if(MACOS_FATLIB)
+    if (CMAKE_OSX_ARCHITECTURES)
+      message(FATAL_ERROR "User supplied -DCMAKE_OSX_ARCHITECTURES overrides -DMACOS_FATLIB=ON")
+    else()
+      set(CMAKE_OSX_ARCHITECTURES "x86_64;i386")
+    endif()
+  endif()
+endif()

external/custom_platforms/custom_platform_2/src/raylib_platform_custom.h

@@ -0,0 +1,36 @@
+/*******************************************************************************************
+*   raylib_platform_custom.h
+*
+*   Custom Platform definition file
+*
+*   LICENSE: zlib/libpng
+*
+*   Copyright (c) 2023 Yan Pujante
+*
+*   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.
+*
+**********************************************************************************************/
+
+#ifndef RAYLIB_PLATFORM_CUSTOM_H
+#define RAYLIB_PLATFORM_CUSTOM_H
+
+#define PLATFORM_CUSTOM_ID "platform_custom_2"
+#define PLATFORM_CUSTOM_BACKEND "Platform backend: Custom Platform 2 (Desktop clone)"
+// #define PLATFORM_CUSTOM_CLOCK_MONOTONIC
+// #define PLATFORM_CUSTOM_DISABLE_HI_RES_TIMER
+#define PLATFORM_CUSTOM_ENABLE_OPENGL_ES2
+
+#endif //RAYLIB_PLATFORM_CUSTOM_H

external/examples/example_for_custom_platform_1/CMakeLists.txt

@@ -0,0 +1,38 @@
+cmake_minimum_required(VERSION 3.0)
+
+# This should be absolute to where raylib lives
+set(RAYLIB_ROOT_DIR "${CMAKE_CURRENT_LIST_DIR}/../../..")
+
+if(PLATFORM STREQUAL "Custom")
+  set(PLATFORM_CUSTOM_ROOT_DIR "${CMAKE_CURRENT_LIST_DIR}/../../custom_platforms/custom_platform_1")
+
+  set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} --profiling-funcs -s USE_GLFW=3 -s ASSERTIONS=1 -s WASM=1 -s ASYNCIFY -s SAFE_HEAP=1")
+endif()
+
+project(example_for_custom_platform_1 LANGUAGES CXX)
+
+set(target "example_for_custom_platform_1")
+
+set(CMAKE_CXX_STANDARD 17)
+
+#######################################################
+# adding raylib
+# Note: raylib is bundled in this project but could
+#       easily be fetched instead
+#######################################################
+add_subdirectory("${RAYLIB_ROOT_DIR}" raylib EXCLUDE_FROM_ALL)
+
+#######################################################
+# Main executable
+#######################################################
+add_executable(${target} main.cpp)
+target_link_libraries(${target} PUBLIC raylib)
+
+if(PLATFORM STREQUAL "Custom")
+  set(CMAKE_EXECUTABLE_SUFFIX ".html")
+  set(EMSDK "$ENV{EMSDK}" CACHE PATH "Location of the emscript sdk")
+  if("${EMSDK}" STREQUAL "")
+    message(FATAL_ERROR "Make sure you define the variable EMSDK (either as an environment variable or as a CMake -DEMSDK=... option).")
+  endif()
+  target_include_directories(${target} PUBLIC "${EMSDK}/emscripten/main/cache/sysroot/include")
+endif()

external/examples/example_for_custom_platform_1/main.cpp

@@ -0,0 +1,28 @@
+#include "raylib.h"
+
+static char BUF[1024];
+
+int main()
+{
+  double width = 850;
+  double height = 450;
+
+  SetConfigFlags(FLAG_WINDOW_RESIZABLE);
+  InitWindow((int) width, (int) height, "raylib custom platform 1 (web)");
+
+  SetTargetFPS(60);
+
+  while (!WindowShouldClose())
+  {
+    BeginDrawing();
+    ClearBackground(RAYWHITE);
+    DrawText("Congrats! You created your first window!", 10, 40, 20, LIGHTGRAY);
+    DrawLine(0, 0, GetScreenWidth(), GetScreenHeight(), RED);
+    DrawFPS(10, 70);
+    EndDrawing();
+  }
+
+  CloseWindow();
+
+  return 0;
+}

external/examples/example_for_custom_platform_2/CMakeLists.txt

@@ -0,0 +1,30 @@
+cmake_minimum_required(VERSION 3.0)
+
+# This should be absolute to where raylib lives
+set(RAYLIB_ROOT_DIR "${CMAKE_CURRENT_LIST_DIR}/../../..")
+
+if(PLATFORM STREQUAL "Custom")
+  # custom_platform_2 requires GLFW_ROOT_DIR to be set
+  set(GLFW_ROOT_DIR "${RAYLIB_ROOT_DIR}/src/external/glfw")
+  set(PLATFORM_CUSTOM_ROOT_DIR "${CMAKE_CURRENT_LIST_DIR}/../../custom_platforms/custom_platform_2")
+endif()
+
+project(example_for_custom_platform_2 LANGUAGES CXX)
+
+set(target "example_for_custom_platform_2")
+
+set(CMAKE_CXX_STANDARD 17)
+
+#######################################################
+# adding raylib
+# Note: raylib is bundled in this project but could
+#       easily be fetched instead
+#######################################################
+add_subdirectory("${RAYLIB_ROOT_DIR}" raylib EXCLUDE_FROM_ALL)
+
+#######################################################
+# Main executable
+#######################################################
+add_executable(${target} main.cpp)
+target_link_libraries(${target} PUBLIC raylib)
+

external/examples/example_for_custom_platform_2/main.cpp

@@ -0,0 +1,28 @@
+#include "raylib.h"
+
+static char BUF[1024];
+
+int main()
+{
+  double width = 850;
+  double height = 450;
+
+  SetConfigFlags(FLAG_WINDOW_RESIZABLE);
+  InitWindow((int) width, (int) height, "raylib custom platform 1 (web)");
+
+  SetTargetFPS(60);
+
+  while (!WindowShouldClose())
+  {
+    BeginDrawing();
+    ClearBackground(RAYWHITE);
+    DrawText("Congrats! You created your first window!", 10, 40, 20, LIGHTGRAY);
+    DrawLine(0, 0, GetScreenWidth(), GetScreenHeight(), RED);
+    DrawFPS(10, 70);
+    EndDrawing();
+  }
+
+  CloseWindow();
+
+  return 0;
+}

src/CMakeLists.txt

@@ -5,6 +5,7 @@ set(API_VERSION 450)
 
 include(GNUInstallDirs)
 include(JoinPaths)
+include(CustomPlatform)
 
 # Sets build type if not set by now
 if(NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES)
@@ -38,7 +39,7 @@ set(raylib_sources
     )
 
 # <root>/cmake/GlfwImport.cmake handles the details around the inclusion of glfw
-if (NOT ${PLATFORM} MATCHES "Web")
+if (NOT ${PLATFORM} MATCHES "Web" AND NOT ${PLATFORM} MATCHES "Custom")
     include(GlfwImport)
 endif ()
 
@@ -47,6 +48,8 @@ endif ()
 # Produces a variable LIBS_PRIVATE that will be used later
 include(LibraryConfigurations)
 
+custom_platform_include_if_exists("raylibPlatformCustomLibraryConfig")
+
 if (USE_AUDIO)
     MESSAGE(STATUS "Audio Backend: miniaudio")
     list(APPEND raylib_sources raudio.c)
@@ -105,6 +108,12 @@ target_include_directories(raylib
                            ${OPENAL_INCLUDE_DIR}
                            )
 
+if("${PLATFORM}" MATCHES "Custom")
+  target_include_directories(raylib PUBLIC "${PLATFORM_CUSTOM_ROOT_DIR}/src")
+endif()
+
+custom_platform_include_if_exists("raylibPlatformCustomTargetConfig")
+
 # Copy the header files to the build directory for convenience
 file(COPY ${raylib_public_headers} DESTINATION "include")
 

src/rcore.c

@@ -235,7 +235,11 @@ __declspec(dllimport) int __stdcall WideCharToMultiByte(unsigned int cp, unsigne
 #define FLAG_TOGGLE(n, f) ((n) ^= (f))
 #define FLAG_CHECK(n, f) ((n) & (f))
 
-#if (defined(__linux__) || defined(PLATFORM_WEB)) && (_POSIX_C_SOURCE < 199309L)
+#if defined(PLATFORM_CUSTOM)
+#include "raylib_platform_custom.h"
+#endif
+
+#if (defined(__linux__) || defined(PLATFORM_WEB) || defined(PLATFORM_CUSTOM_CLOCK_MONOTONIC)) && (_POSIX_C_SOURCE < 199309L)
     #undef _POSIX_C_SOURCE
     #define _POSIX_C_SOURCE 199309L // Required for: CLOCK_MONOTONIC if compiled with c99 without gnu ext.
 #endif
@@ -491,6 +495,8 @@ const char *TextFormat(const char *text, ...);              // Formatting of tex
     #include "platforms/rcore_drm.c"
 #elif defined(PLATFORM_ANDROID)
     #include "platforms/rcore_android.c"
+#elif defined(PLATFORM_CUSTOM)
+    #include "raylib_platform_custom.c"
 #else
     // TODO: Include your custom platform backend!
     // i.e software rendering backend or console backend!
@@ -559,6 +565,8 @@ void InitWindow(int width, int height, const char *title)
     TRACELOG(LOG_INFO, "Platform backend: NATIVE DRM");
 #elif defined(PLATFORM_ANDROID)
     TRACELOG(LOG_INFO, "Platform backend: ANDROID");
+#elif defined(PLATFORM_CUSTOM)
+    TRACELOG(LOG_INFO, PLATFORM_CUSTOM_BACKEND);
 #else
     // TODO: Include your custom platform backend!
     // i.e software rendering backend or console backend!
@@ -3046,7 +3054,7 @@ void InitTimer(void)
     // However, it can also reduce overall system performance, because the thread scheduler switches tasks more often.
     // High resolutions can also prevent the CPU power management system from entering power-saving modes.
     // Setting a higher resolution does not improve the accuracy of the high-resolution performance counter.
-#if defined(_WIN32) && defined(SUPPORT_WINMM_HIGHRES_TIMER) && !defined(SUPPORT_BUSY_WAIT_LOOP) && !defined(PLATFORM_DESKTOP_SDL)
+#if defined(_WIN32) && defined(SUPPORT_WINMM_HIGHRES_TIMER) && !defined(SUPPORT_BUSY_WAIT_LOOP) && !defined(PLATFORM_DESKTOP_SDL) && !defined(PLATFORM_CUSTOM_DISABLE_HI_RES_TIMER)
     timeBeginPeriod(1);                 // Setup high-resolution timer to 1ms (granularity of 1-2 ms)
 #endif
 

src/rlgl.h

@@ -324,6 +324,10 @@
 //----------------------------------------------------------------------------------
 // Types and Structures Definition
 //----------------------------------------------------------------------------------
+#if defined(PLATFORM_CUSTOM)
+#include "raylib_platform_custom.h"
+#endif
+
 #if (defined(__STDC__) && __STDC_VERSION__ >= 199901L) || (defined(_MSC_VER) && _MSC_VER >= 1800)
     #include <stdbool.h>
 #elif !defined(__cplusplus) && !defined(bool) && !defined(RL_BOOL_TYPE)
@@ -818,7 +822,7 @@ RLAPI void rlLoadDrawQuad(void);     // Load and draw a quad
 #elif defined(GRAPHICS_API_OPENGL_ES2)
     // NOTE: OpenGL ES 2.0 can be enabled on PLATFORM_DESKTOP,
     // in that case, functions are loaded from a custom glad for OpenGL ES 2.0
-    #if defined(PLATFORM_DESKTOP) || defined(PLATFORM_DESKTOP_SDL)
+    #if defined(PLATFORM_DESKTOP) || defined(PLATFORM_DESKTOP_SDL) || defined(PLATFORM_CUSTOM_ENABLE_OPENGL_ES2)
         #define GLAD_GLES2_IMPLEMENTATION
         #include "external/glad_gles2.h"
     #else
@@ -2281,7 +2285,7 @@ void rlLoadExtensions(void *loader)
 
 #elif defined(GRAPHICS_API_OPENGL_ES2)
 
-    #if defined(PLATFORM_DESKTOP) || defined(PLATFORM_DESKTOP_SDL)
+    #if defined(PLATFORM_DESKTOP) || defined(PLATFORM_DESKTOP_SDL) || defined(PLATFORM_CUSTOM_ENABLE_OPENGL_ES2)
     // TODO: Support GLAD loader for OpenGL ES 3.0
     if (gladLoadGLES2((GLADloadfunc)loader) == 0) TRACELOG(RL_LOG_WARNING, "GLAD: Cannot load OpenGL ES2.0 functions");
     else TRACELOG(RL_LOG_INFO, "GLAD: OpenGL ES 2.0 loaded successfully");