ADDED: Custom platform template! #3313

src/rcore_custom.c

@@ -0,0 +1,789 @@
+/**********************************************************************************************
+*
+*   rcore_<platform> - Functions to manage window, graphics device and inputs 
+*
+*   PLATFORM: <PLATFORM>
+*       - TODO: Define the target platform for the core
+*
+*   LIMITATIONS:
+*       - Limitation 01
+*       - Limitation 02
+*
+*   POSSIBLE IMPROVEMENTS:
+*       - Improvement 01
+*       - Improvement 02
+*
+*   ADDITIONAL NOTES:
+*       - TRACELOG() function is located in raylib [utils] module
+*
+*   CONFIGURATION:
+*       #define RCORE_CUSTOM_FLAG
+*           Custom flag for rcore on PLATFORM_<platform> -not used-
+*
+*   DEPENDENCIES:
+*       - Dependency 01
+*       - Dependency 02
+*
+*
+*   LICENSE: zlib/libpng
+*
+*   Copyright (c) 2013-2023 Ramon Santamaria (@raysan5) and contributors
+*
+*   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.
+*
+**********************************************************************************************/
+
+#include "rcore.h"
+
+// TODO: Include the platform specific libraries 
+    
+//----------------------------------------------------------------------------------
+// Types and Structures Definition
+//----------------------------------------------------------------------------------
+typedef struct {
+    // TODO: Define the platform specific variables required
+    
+    // Display data
+    EGLDisplay device;                  // Native display device (physical screen connection)
+    EGLSurface surface;                 // Surface to draw on, framebuffers (connected to context)
+    EGLContext context;                 // Graphic context, mode in which drawing can be done
+    EGLConfig config;                   // Graphic config
+} PlatformData;
+
+//----------------------------------------------------------------------------------
+// Global Variables Definition
+//----------------------------------------------------------------------------------
+extern CoreData CORE;                   // Global CORE state context
+
+static PlatformData platform = { 0 };   // Platform specific data
+
+//----------------------------------------------------------------------------------
+// Module Internal Functions Declaration
+//----------------------------------------------------------------------------------
+static bool InitGraphicsDevice(int width, int height); // Initialize graphics device
+
+//----------------------------------------------------------------------------------
+// Module Functions Declaration
+//----------------------------------------------------------------------------------
+// NOTE: Functions declaration is provided by raylib.h
+
+//----------------------------------------------------------------------------------
+// Module Functions Definition: Window and Graphics Device
+//----------------------------------------------------------------------------------
+
+// Initialize window and OpenGL context
+// NOTE: data parameter could be used to pass any kind of required data to the initialization
+void InitWindow(int width, int height, const char *title)
+{
+    TRACELOG(LOG_INFO, "Initializing raylib %s", RAYLIB_VERSION);
+
+    TRACELOG(LOG_INFO, "Supported raylib modules:");
+    TRACELOG(LOG_INFO, "    > rcore:..... loaded (mandatory)");
+    TRACELOG(LOG_INFO, "    > rlgl:...... loaded (mandatory)");
+#if defined(SUPPORT_MODULE_RSHAPES)
+    TRACELOG(LOG_INFO, "    > rshapes:... loaded (optional)");
+#else
+    TRACELOG(LOG_INFO, "    > rshapes:... not loaded (optional)");
+#endif
+#if defined(SUPPORT_MODULE_RTEXTURES)
+    TRACELOG(LOG_INFO, "    > rtextures:. loaded (optional)");
+#else
+    TRACELOG(LOG_INFO, "    > rtextures:. not loaded (optional)");
+#endif
+#if defined(SUPPORT_MODULE_RTEXT)
+    TRACELOG(LOG_INFO, "    > rtext:..... loaded (optional)");
+#else
+    TRACELOG(LOG_INFO, "    > rtext:..... not loaded (optional)");
+#endif
+#if defined(SUPPORT_MODULE_RMODELS)
+    TRACELOG(LOG_INFO, "    > rmodels:... loaded (optional)");
+#else
+    TRACELOG(LOG_INFO, "    > rmodels:... not loaded (optional)");
+#endif
+#if defined(SUPPORT_MODULE_RAUDIO)
+    TRACELOG(LOG_INFO, "    > raudio:.... loaded (optional)");
+#else
+    TRACELOG(LOG_INFO, "    > raudio:.... not loaded (optional)");
+#endif
+
+    // NOTE: Keep internal pointer to input title string (no copy)
+    if ((title != NULL) && (title[0] != 0)) CORE.Window.title = title;
+
+    // Initialize global input state
+    memset(&CORE.Input, 0, sizeof(CORE.Input));
+    CORE.Input.Keyboard.exitKey = KEY_ESCAPE;
+    CORE.Input.Mouse.scale = (Vector2){ 1.0f, 1.0f };
+    CORE.Input.Mouse.cursor = MOUSE_CURSOR_ARROW;
+    CORE.Input.Gamepad.lastButtonPressed = 0;       // GAMEPAD_BUTTON_UNKNOWN
+    CORE.Window.eventWaiting = false;
+
+    CORE.Window.screen.width = width;
+    CORE.Window.screen.height = height;
+    CORE.Window.currentFbo.width = width;
+    CORE.Window.currentFbo.height = height;
+
+    // TODO: Initialize window/display system
+    
+    // TODO: Initialize input events system
+
+    // TODO: Initialize assets manager
+
+    // TODO: Initialize base path for storage
+    //CORE.Storage.basePath = platform.app->activity->internalDataPath;
+
+    TRACELOG(LOG_INFO, "PLATFORM: Application initialized successfully");
+}
+
+// Close window and unload OpenGL context
+void CloseWindow(void)
+{
+#if defined(SUPPORT_GIF_RECORDING)
+    if (gifRecording)
+    {
+        MsfGifResult result = msf_gif_end(&gifState);
+        msf_gif_free(result);
+        gifRecording = false;
+    }
+#endif
+
+#if defined(SUPPORT_MODULE_RTEXT) && defined(SUPPORT_DEFAULT_FONT)
+    UnloadFontDefault();        // WARNING: Module required: rtext
+#endif
+
+    rlglClose();                // De-init rlgl
+
+#if defined(_WIN32) && defined(SUPPORT_WINMM_HIGHRES_TIMER) && !defined(SUPPORT_BUSY_WAIT_LOOP)
+    timeEndPeriod(1);           // Restore time period
+#endif
+
+    // TODO: Close surface, context and display
+
+#if defined(SUPPORT_EVENTS_AUTOMATION)
+    RL_FREE(events);
+#endif
+
+    CORE.Window.ready = false;
+    TRACELOG(LOG_INFO, "Window closed successfully");
+}
+
+// Check if application should close
+bool WindowShouldClose(void)
+{
+    if (CORE.Window.ready) return CORE.Window.shouldClose;
+    else return true;
+}
+
+// Check if window is currently hidden
+bool IsWindowHidden(void)
+{
+    return false;
+}
+
+// Check if window has been minimized
+bool IsWindowMinimized(void)
+{
+    return false;
+}
+
+// Check if window has been maximized
+bool IsWindowMaximized(void)
+{
+    return false;
+}
+
+// Check if window has the focus
+bool IsWindowFocused(void)
+{
+    return platform.appEnabled;
+}
+
+// Check if window has been resizedLastFrame
+bool IsWindowResized(void)
+{
+    return false;
+}
+
+// Toggle fullscreen mode
+void ToggleFullscreen(void)
+{
+    TRACELOG(LOG_WARNING, "ToggleFullscreen() not available on PLATFORM_CUSTOM");
+}
+
+// Set window state: maximized, if resizable
+void MaximizeWindow(void)
+{
+    TRACELOG(LOG_WARNING, "MaximizeWindow() not available on PLATFORM_CUSTOM");
+}
+
+// Set window state: minimized
+void MinimizeWindow(void)
+{
+    TRACELOG(LOG_WARNING, "MinimizeWindow() not available on PLATFORM_CUSTOM");
+}
+
+// Set window state: not minimized/maximized
+void RestoreWindow(void)
+{
+    TRACELOG(LOG_WARNING, "RestoreWindow() not available on PLATFORM_CUSTOM");
+}
+
+// Toggle borderless windowed mode
+void ToggleBorderlessWindowed(void)
+{
+    TRACELOG(LOG_WARNING, "ToggleBorderlessWindowed() not available on PLATFORM_CUSTOM");
+}
+
+// Set window configuration state using flags
+void SetWindowState(unsigned int flags)
+{
+    TRACELOG(LOG_WARNING, "SetWindowState() not available on PLATFORM_CUSTOM");
+}
+
+// Clear window configuration state flags
+void ClearWindowState(unsigned int flags)
+{
+    TRACELOG(LOG_WARNING, "ClearWindowState() not available on PLATFORM_CUSTOM");
+}
+
+// Set icon for window
+void SetWindowIcon(Image image)
+{
+    TRACELOG(LOG_WARNING, "SetWindowIcon() not available on PLATFORM_CUSTOM");
+}
+
+// Set icon for window
+void SetWindowIcons(Image *images, int count)
+{
+    TRACELOG(LOG_WARNING, "SetWindowIcons() not available on PLATFORM_CUSTOM");
+}
+
+// Set title for window
+void SetWindowTitle(const char *title)
+{
+    CORE.Window.title = title;
+}
+
+// Set window position on screen (windowed mode)
+void SetWindowPosition(int x, int y)
+{
+    TRACELOG(LOG_WARNING, "SetWindowPosition() not available on PLATFORM_CUSTOM");
+}
+
+// Set monitor for the current window
+void SetWindowMonitor(int monitor)
+{
+    TRACELOG(LOG_WARNING, "SetWindowMonitor() not available on PLATFORM_CUSTOM");
+}
+
+// Set window minimum dimensions (FLAG_WINDOW_RESIZABLE)
+void SetWindowMinSize(int width, int height)
+{
+    CORE.Window.windowMin.width = width;
+    CORE.Window.windowMin.height = height;
+}
+
+// Set window maximum dimensions (FLAG_WINDOW_RESIZABLE)
+void SetWindowMaxSize(int width, int height)
+{
+    CORE.Window.windowMax.width = width;
+    CORE.Window.windowMax.height = height;
+}
+
+// Set window dimensions
+void SetWindowSize(int width, int height)
+{
+    TRACELOG(LOG_WARNING, "SetWindowSize() not available on PLATFORM_CUSTOM");
+}
+
+// Set window opacity, value opacity is between 0.0 and 1.0
+void SetWindowOpacity(float opacity)
+{
+    TRACELOG(LOG_WARNING, "SetWindowOpacity() not available on PLATFORM_CUSTOM");
+}
+
+// Set window focused
+void SetWindowFocused(void)
+{
+    TRACELOG(LOG_WARNING, "SetWindowFocused() not available on PLATFORM_CUSTOM");
+}
+
+// Get native window handle
+void *GetWindowHandle(void)
+{
+    TRACELOG(LOG_WARNING, "GetWindowHandle() not implemented on PLATFORM_CUSTOM");
+    return NULL;
+}
+
+// Get number of monitors
+int GetMonitorCount(void)
+{
+    TRACELOG(LOG_WARNING, "GetMonitorCount() not implemented on PLATFORM_CUSTOM");
+    return 1;
+}
+
+// Get number of monitors
+int GetCurrentMonitor(void)
+{
+    TRACELOG(LOG_WARNING, "GetCurrentMonitor() not implemented on PLATFORM_CUSTOM");
+    return 0;
+}
+
+// Get selected monitor position
+Vector2 GetMonitorPosition(int monitor)
+{
+    TRACELOG(LOG_WARNING, "GetMonitorPosition() not implemented on PLATFORM_CUSTOM");
+    return (Vector2){ 0, 0 };
+}
+
+// Get selected monitor width (currently used by monitor)
+int GetMonitorWidth(int monitor)
+{
+    TRACELOG(LOG_WARNING, "GetMonitorWidth() not implemented on PLATFORM_CUSTOM");
+    return 0;
+}
+
+// Get selected monitor height (currently used by monitor)
+int GetMonitorHeight(int monitor)
+{
+    TRACELOG(LOG_WARNING, "GetMonitorHeight() not implemented on PLATFORM_CUSTOM");
+    return 0;
+}
+
+// Get selected monitor physical width in millimetres
+int GetMonitorPhysicalWidth(int monitor)
+{
+    TRACELOG(LOG_WARNING, "GetMonitorPhysicalWidth() not implemented on PLATFORM_CUSTOM");
+    return 0;
+}
+
+// Get selected monitor physical height in millimetres
+int GetMonitorPhysicalHeight(int monitor)
+{
+    TRACELOG(LOG_WARNING, "GetMonitorPhysicalHeight() not implemented on PLATFORM_CUSTOM");
+    return 0;
+}
+
+// Get selected monitor refresh rate
+int GetMonitorRefreshRate(int monitor)
+{
+    TRACELOG(LOG_WARNING, "GetMonitorRefreshRate() not implemented on PLATFORM_CUSTOM");
+    return 0;
+}
+
+// Get the human-readable, UTF-8 encoded name of the selected monitor
+const char *GetMonitorName(int monitor)
+{
+    TRACELOG(LOG_WARNING, "GetMonitorName() not implemented on PLATFORM_CUSTOM");
+    return "";
+}
+
+// Get window position XY on monitor
+Vector2 GetWindowPosition(void)
+{
+    TRACELOG(LOG_WARNING, "GetWindowPosition() not implemented on PLATFORM_CUSTOM");
+    return (Vector2){ 0, 0 };
+}
+
+// Get window scale DPI factor for current monitor
+Vector2 GetWindowScaleDPI(void)
+{
+    TRACELOG(LOG_WARNING, "GetWindowScaleDPI() not implemented on PLATFORM_CUSTOM");
+    return (Vector2){ 1.0f, 1.0f };
+}
+
+// Set clipboard text content
+void SetClipboardText(const char *text)
+{
+    TRACELOG(LOG_WARNING, "SetClipboardText() not implemented on PLATFORM_CUSTOM");
+}
+
+// Get clipboard text content
+// NOTE: returned string is allocated and freed by GLFW
+const char *GetClipboardText(void)
+{
+    TRACELOG(LOG_WARNING, "GetClipboardText() not implemented on PLATFORM_CUSTOM");
+    return NULL;
+}
+
+// Show mouse cursor
+void ShowCursor(void)
+{
+    CORE.Input.Mouse.cursorHidden = false;
+}
+
+// Hides mouse cursor
+void HideCursor(void)
+{
+    CORE.Input.Mouse.cursorHidden = true;
+}
+
+// Enables cursor (unlock cursor)
+void EnableCursor(void)
+{
+    // Set cursor position in the middle
+    SetMousePosition(CORE.Window.screen.width/2, CORE.Window.screen.height/2);
+
+    CORE.Input.Mouse.cursorHidden = false;
+}
+
+// Disables cursor (lock cursor)
+void DisableCursor(void)
+{
+    // Set cursor position in the middle
+    SetMousePosition(CORE.Window.screen.width/2, CORE.Window.screen.height/2);
+
+    CORE.Input.Mouse.cursorHidden = true;
+}
+
+// Swap back buffer with front buffer (screen drawing)
+void SwapScreenBuffer(void)
+{
+    eglSwapBuffers(platform.device, platform.surface);
+}
+
+//----------------------------------------------------------------------------------
+// Module Functions Definition: Misc
+//----------------------------------------------------------------------------------
+
+// Get elapsed time measure in seconds since InitTimer()
+double GetTime(void)
+{
+    double time = 0.0;
+    struct timespec ts = { 0 };
+    clock_gettime(CLOCK_MONOTONIC, &ts);
+    unsigned long long int nanoSeconds = (unsigned long long int)ts.tv_sec*1000000000LLU + (unsigned long long int)ts.tv_nsec;
+
+    time = (double)(nanoSeconds - CORE.Time.base)*1e-9;  // Elapsed time since InitTimer()
+    
+    return time;
+}
+
+// Open URL with default system browser (if available)
+// NOTE: This function is only safe to use if you control the URL given.
+// A user could craft a malicious string performing another action.
+// Only call this function yourself not with user input or make sure to check the string yourself.
+// Ref: https://github.com/raysan5/raylib/issues/686
+void OpenURL(const char *url)
+{
+    // Security check to (partially) avoid malicious code on PLATFORM_CUSTOM
+    if (strchr(url, '\'') != NULL) TRACELOG(LOG_WARNING, "SYSTEM: Provided URL could be potentially malicious, avoid [\'] character");
+    else
+    {
+        JNIEnv *env = NULL;
+        JavaVM *vm = platform.app->activity->vm;
+        (*vm)->AttachCurrentThread(vm, &env, NULL);
+
+        jstring urlString = (*env)->NewStringUTF(env, url);
+        jclass uriClass = (*env)->FindClass(env, "android/net/Uri");
+        jmethodID uriParse = (*env)->GetStaticMethodID(env, uriClass, "parse", "(Ljava/lang/String;)Landroid/net/Uri;");
+        jobject uri = (*env)->CallStaticObjectMethod(env, uriClass, uriParse, urlString);
+
+        jclass intentClass = (*env)->FindClass(env, "android/content/Intent");
+        jfieldID actionViewId = (*env)->GetStaticFieldID(env, intentClass, "ACTION_VIEW", "Ljava/lang/String;");
+        jobject actionView = (*env)->GetStaticObjectField(env, intentClass, actionViewId);
+        jmethodID newIntent = (*env)->GetMethodID(env, intentClass, "<init>", "(Ljava/lang/String;Landroid/net/Uri;)V");
+        jobject intent = (*env)->AllocObject(env, intentClass);
+
+        (*env)->CallVoidMethod(env, intent, newIntent, actionView, uri);
+        jclass activityClass = (*env)->FindClass(env, "android/app/Activity");
+        jmethodID startActivity = (*env)->GetMethodID(env, activityClass, "startActivity", "(Landroid/content/Intent;)V");
+        (*env)->CallVoidMethod(env, platform.app->activity->clazz, startActivity, intent);
+
+        (*vm)->DetachCurrentThread(vm);
+    }
+}
+
+//----------------------------------------------------------------------------------
+// Module Functions Definition: Inputs
+//----------------------------------------------------------------------------------
+
+// Set a custom key to exit program
+void SetExitKey(int key)
+{
+    TRACELOG(LOG_WARNING, "SetExitKey() not implemented on PLATFORM_CUSTOM");
+}
+
+// Get gamepad internal name id
+const char *GetGamepadName(int gamepad)
+{
+    TRACELOG(LOG_WARNING, "GetGamepadName() not implemented on PLATFORM_CUSTOM");
+    return NULL;
+}
+
+// Get gamepad axis count
+int GetGamepadAxisCount(int gamepad)
+{
+    return CORE.Input.Gamepad.axisCount;
+}
+
+// Set internal gamepad mappings
+int SetGamepadMappings(const char *mappings)
+{
+    TRACELOG(LOG_WARNING, "SetGamepadMappings() not implemented on PLATFORM_CUSTOM");
+    return 0;
+}
+
+// Get mouse position X
+int GetMouseX(void)
+{
+    return (int)CORE.Input.Touch.position[0].x;
+}
+
+// Get mouse position Y
+int GetMouseY(void)
+{
+    return (int)CORE.Input.Touch.position[0].y;
+}
+
+// Get mouse position XY
+Vector2 GetMousePosition(void)
+{
+    return GetTouchPosition(0);
+}
+
+// Set mouse position XY
+void SetMousePosition(int x, int y)
+{
+    CORE.Input.Mouse.currentPosition = (Vector2){ (float)x, (float)y };
+    CORE.Input.Mouse.previousPosition = CORE.Input.Mouse.currentPosition;
+}
+
+// Get mouse wheel movement Y
+float GetMouseWheelMove(void)
+{
+    TRACELOG(LOG_WARNING, "GetMouseWheelMove() not implemented on PLATFORM_CUSTOM");
+    return 0.0f;
+}
+
+// Set mouse cursor
+void SetMouseCursor(int cursor)
+{
+    TRACELOG(LOG_WARNING, "SetMouseCursor() not implemented on PLATFORM_CUSTOM");
+}
+
+// Get touch position X for touch point 0 (relative to screen size)
+int GetTouchX(void)
+{
+    return (int)CORE.Input.Touch.position[0].x;
+}
+
+// Get touch position Y for touch point 0 (relative to screen size)
+int GetTouchY(void)
+{
+    return (int)CORE.Input.Touch.position[0].y;
+}
+
+// Get touch position XY for a touch point index (relative to screen size)
+// TODO: Touch position should be scaled depending on display size and render size
+Vector2 GetTouchPosition(int index)
+{
+    Vector2 position = { -1.0f, -1.0f };
+
+    if (index < MAX_TOUCH_POINTS) position = CORE.Input.Touch.position[index];
+    else TRACELOG(LOG_WARNING, "INPUT: Required touch point out of range (Max touch points: %i)", MAX_TOUCH_POINTS);
+
+    return position;
+}
+
+// Register all input events
+void PollInputEvents(void)
+{
+#if defined(SUPPORT_GESTURES_SYSTEM)
+    // NOTE: Gestures update must be called every frame to reset gestures correctly
+    // because ProcessGestureEvent() is just called on an event, not every frame
+    UpdateGestures();
+#endif
+
+    // Reset keys/chars pressed registered
+    CORE.Input.Keyboard.keyPressedQueueCount = 0;
+    CORE.Input.Keyboard.charPressedQueueCount = 0;
+    
+    // Reset key repeats
+    for (int i = 0; i < MAX_KEYBOARD_KEYS; i++) CORE.Input.Keyboard.keyRepeatInFrame[i] = 0;
+
+    // Reset last gamepad button/axis registered state
+    CORE.Input.Gamepad.lastButtonPressed = 0; // GAMEPAD_BUTTON_UNKNOWN
+    CORE.Input.Gamepad.axisCount = 0;
+
+    // Register previous touch states
+    for (int i = 0; i < MAX_TOUCH_POINTS; i++) CORE.Input.Touch.previousTouchState[i] = CORE.Input.Touch.currentTouchState[i];
+
+    // Reset touch positions
+    // TODO: It resets on PLATFORM_CUSTOM the mouse position and not filled again until a move-event,
+    // so, if mouse is not moved it returns a (0, 0) position... this behaviour should be reviewed!
+    //for (int i = 0; i < MAX_TOUCH_POINTS; i++) CORE.Input.Touch.position[i] = (Vector2){ 0, 0 };
+
+    // Register previous keys states
+    // NOTE: Android supports up to 260 keys
+    for (int i = 0; i < 260; i++)
+    {
+        CORE.Input.Keyboard.previousKeyState[i] = CORE.Input.Keyboard.currentKeyState[i];
+        CORE.Input.Keyboard.keyRepeatInFrame[i] = 0;
+    }
+
+    // TODO: Poll input events for current plaform
+}
+
+
+//----------------------------------------------------------------------------------
+// Module Internal Functions Definition
+//----------------------------------------------------------------------------------
+
+// Initialize display device and framebuffer
+// NOTE: width and height represent the screen (framebuffer) desired size, not actual display size
+// If width or height are 0, default display size will be used for framebuffer size
+// NOTE: returns false in case graphic device could not be created
+static bool InitGraphicsDevice(int width, int height)
+{
+    CORE.Window.screen.width = width;            // User desired width
+    CORE.Window.screen.height = height;          // User desired height
+    CORE.Window.screenScale = MatrixIdentity();  // No draw scaling required by default
+
+    // Set the screen minimum and maximum default values to 0
+    CORE.Window.screenMin.width  = 0;
+    CORE.Window.screenMin.height = 0;
+    CORE.Window.screenMax.width  = 0;
+    CORE.Window.screenMax.height = 0;
+
+    // NOTE: Framebuffer (render area - CORE.Window.render.width, CORE.Window.render.height) could include black bars...
+    // ...in top-down or left-right to match display aspect ratio (no weird scaling)
+
+    CORE.Window.fullscreen = true;
+    CORE.Window.flags |= FLAG_FULLSCREEN_MODE;
+
+    EGLint samples = 0;
+    EGLint sampleBuffer = 0;
+    if (CORE.Window.flags & FLAG_MSAA_4X_HINT)
+    {
+        samples = 4;
+        sampleBuffer = 1;
+        TRACELOG(LOG_INFO, "DISPLAY: Trying to enable MSAA x4");
+    }
+
+    const EGLint framebufferAttribs[] =
+    {
+        EGL_RENDERABLE_TYPE, (rlGetVersion() == RL_OPENGL_ES_30)? EGL_OPENGL_ES3_BIT : EGL_OPENGL_ES2_BIT,      // Type of context support
+        EGL_RED_SIZE, 8,            // RED color bit depth (alternative: 5)
+        EGL_GREEN_SIZE, 8,          // GREEN color bit depth (alternative: 6)
+        EGL_BLUE_SIZE, 8,           // BLUE color bit depth (alternative: 5)
+        //EGL_TRANSPARENT_TYPE, EGL_NONE, // Request transparent framebuffer (EGL_TRANSPARENT_RGB does not work on RPI)
+        EGL_DEPTH_SIZE, 16,         // Depth buffer size (Required to use Depth testing!)
+        //EGL_STENCIL_SIZE, 8,      // Stencil buffer size
+        EGL_SAMPLE_BUFFERS, sampleBuffer,    // Activate MSAA
+        EGL_SAMPLES, samples,       // 4x Antialiasing if activated (Free on MALI GPUs)
+        EGL_NONE
+    };
+
+    const EGLint contextAttribs[] =
+    {
+        EGL_CONTEXT_CLIENT_VERSION, 2,
+        EGL_NONE
+    };
+
+    EGLint numConfigs = 0;
+
+    // Get an EGL device connection
+    platform.device = eglGetDisplay(EGL_DEFAULT_DISPLAY);
+    if (platform.device == EGL_NO_DISPLAY)
+    {
+        TRACELOG(LOG_WARNING, "DISPLAY: Failed to initialize EGL device");
+        return false;
+    }
+
+    // Initialize the EGL device connection
+    if (eglInitialize(platform.device, NULL, NULL) == EGL_FALSE)
+    {
+        // If all of the calls to eglInitialize returned EGL_FALSE then an error has occurred.
+        TRACELOG(LOG_WARNING, "DISPLAY: Failed to initialize EGL device");
+        return false;
+    }
+
+    // Get an appropriate EGL framebuffer configuration
+    eglChooseConfig(platform.device, framebufferAttribs, &platform.config, 1, &numConfigs);
+
+    // Set rendering API
+    eglBindAPI(EGL_OPENGL_ES_API);
+
+    // Create an EGL rendering context
+    platform.context = eglCreateContext(platform.device, platform.config, EGL_NO_CONTEXT, contextAttribs);
+    if (platform.context == EGL_NO_CONTEXT)
+    {
+        TRACELOG(LOG_WARNING, "DISPLAY: Failed to create EGL context");
+        return false;
+    }
+
+    // Create an EGL window surface
+    //---------------------------------------------------------------------------------
+    EGLint displayFormat = 0;
+
+    // EGL_NATIVE_VISUAL_ID is an attribute of the EGLConfig that is guaranteed to be accepted by ANativeWindow_setBuffersGeometry()
+    // As soon as we picked a EGLConfig, we can safely reconfigure the ANativeWindow buffers to match, using EGL_NATIVE_VISUAL_ID
+    eglGetConfigAttrib(platform.device, platform.config, EGL_NATIVE_VISUAL_ID, &displayFormat);
+
+    // At this point we need to manage render size vs screen size
+    // NOTE: This function use and modify global module variables:
+    //  -> CORE.Window.screen.width/CORE.Window.screen.height
+    //  -> CORE.Window.render.width/CORE.Window.render.height
+    //  -> CORE.Window.screenScale
+    SetupFramebuffer(CORE.Window.display.width, CORE.Window.display.height);
+
+    ANativeWindow_setBuffersGeometry(platform.app->window, CORE.Window.render.width, CORE.Window.render.height, displayFormat);
+    //ANativeWindow_setBuffersGeometry(platform.app->window, 0, 0, displayFormat);       // Force use of native display size
+
+    platform.surface = eglCreateWindowSurface(platform.device, platform.config, platform.app->window, NULL);
+
+    // There must be at least one frame displayed before the buffers are swapped
+    //eglSwapInterval(platform.device, 1);
+
+    if (eglMakeCurrent(platform.device, platform.surface, platform.surface, platform.context) == EGL_FALSE)
+    {
+        TRACELOG(LOG_WARNING, "DISPLAY: Failed to attach EGL rendering context to EGL surface");
+        return false;
+    }
+    else
+    {
+        CORE.Window.render.width = CORE.Window.screen.width;
+        CORE.Window.render.height = CORE.Window.screen.height;
+        CORE.Window.currentFbo.width = CORE.Window.render.width;
+        CORE.Window.currentFbo.height = CORE.Window.render.height;
+
+        TRACELOG(LOG_INFO, "DISPLAY: Device initialized successfully");
+        TRACELOG(LOG_INFO, "    > Display size: %i x %i", CORE.Window.display.width, CORE.Window.display.height);
+        TRACELOG(LOG_INFO, "    > Screen size:  %i x %i", CORE.Window.screen.width, CORE.Window.screen.height);
+        TRACELOG(LOG_INFO, "    > Render size:  %i x %i", CORE.Window.render.width, CORE.Window.render.height);
+        TRACELOG(LOG_INFO, "    > Viewport offsets: %i, %i", CORE.Window.renderOffset.x, CORE.Window.renderOffset.y);
+    }
+
+    // Load OpenGL extensions
+    // NOTE: GL procedures address loader is required to load extensions
+    rlLoadExtensions(eglGetProcAddress);
+
+    // Initialize OpenGL context (states and resources)
+    // NOTE: CORE.Window.currentFbo.width and CORE.Window.currentFbo.height not used, just stored as globals in rlgl
+    rlglInit(CORE.Window.currentFbo.width, CORE.Window.currentFbo.height);
+
+    // Setup default viewport
+    // NOTE: It updated CORE.Window.render.width and CORE.Window.render.height
+    SetupViewport(CORE.Window.currentFbo.width, CORE.Window.currentFbo.height);
+
+    CORE.Window.ready = true;
+
+    if ((CORE.Window.flags & FLAG_WINDOW_MINIMIZED) > 0) MinimizeWindow();
+
+    return true;
+}
+
+// EOF