init

src/platforms/rcore_ios.c

@@ -0,0 +1,591 @@
+/**********************************************************************************************
+*
+*   rcore_<platform> template - 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_PLATFORM_CUSTOM_FLAG
+*           Custom flag for rcore on target platform -not used-
+*
+*   DEPENDENCIES:
+*       - <platform-specific SDK dependency>
+*       - gestures: Gestures system for touch-ready devices (or simulated from mouse inputs)
+*
+*
+*   LICENSE: zlib/libpng
+*
+*   Copyright (c) 2013-2024 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.
+*
+**********************************************************************************************/
+
+// 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
+//----------------------------------------------------------------------------------
+int InitPlatform(void);          // Initialize platform (graphics, inputs and more)
+bool InitGraphicsDevice(void);   // Initialize graphics device
+
+//----------------------------------------------------------------------------------
+// Module Functions Declaration
+//----------------------------------------------------------------------------------
+// NOTE: Functions declaration is provided by raylib.h
+
+//----------------------------------------------------------------------------------
+// Module Functions Definition: Window and Graphics Device
+//----------------------------------------------------------------------------------
+
+// Check if application should close
+bool WindowShouldClose(void)
+{
+    if (CORE.Window.ready) return CORE.Window.shouldClose;
+    else return true;
+}
+
+// Toggle fullscreen mode
+void ToggleFullscreen(void)
+{
+    TRACELOG(LOG_WARNING, "ToggleFullscreen() not available on target platform");
+}
+
+// Toggle borderless windowed mode
+void ToggleBorderlessWindowed(void)
+{
+    TRACELOG(LOG_WARNING, "ToggleBorderlessWindowed() not available on target platform");
+}
+
+// Set window state: maximized, if resizable
+void MaximizeWindow(void)
+{
+    TRACELOG(LOG_WARNING, "MaximizeWindow() not available on target platform");
+}
+
+// Set window state: minimized
+void MinimizeWindow(void)
+{
+    TRACELOG(LOG_WARNING, "MinimizeWindow() not available on target platform");
+}
+
+// Set window state: not minimized/maximized
+void RestoreWindow(void)
+{
+    TRACELOG(LOG_WARNING, "RestoreWindow() not available on target platform");
+}
+
+// Set window configuration state using flags
+void SetWindowState(unsigned int flags)
+{
+    TRACELOG(LOG_WARNING, "SetWindowState() not available on target platform");
+}
+
+// Clear window configuration state flags
+void ClearWindowState(unsigned int flags)
+{
+    TRACELOG(LOG_WARNING, "ClearWindowState() not available on target platform");
+}
+
+// Set icon for window
+void SetWindowIcon(Image image)
+{
+    TRACELOG(LOG_WARNING, "SetWindowIcon() not available on target platform");
+}
+
+// Set icon for window
+void SetWindowIcons(Image *images, int count)
+{
+    TRACELOG(LOG_WARNING, "SetWindowIcons() not available on target platform");
+}
+
+// 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 target platform");
+}
+
+// Set monitor for the current window
+void SetWindowMonitor(int monitor)
+{
+    TRACELOG(LOG_WARNING, "SetWindowMonitor() not available on target platform");
+}
+
+// Set window minimum dimensions (FLAG_WINDOW_RESIZABLE)
+void SetWindowMinSize(int width, int height)
+{
+    CORE.Window.screenMin.width = width;
+    CORE.Window.screenMin.height = height;
+}
+
+// Set window maximum dimensions (FLAG_WINDOW_RESIZABLE)
+void SetWindowMaxSize(int width, int height)
+{
+    CORE.Window.screenMax.width = width;
+    CORE.Window.screenMax.height = height;
+}
+
+// Set window dimensions
+void SetWindowSize(int width, int height)
+{
+    TRACELOG(LOG_WARNING, "SetWindowSize() not available on target platform");
+}
+
+// Set window opacity, value opacity is between 0.0 and 1.0
+void SetWindowOpacity(float opacity)
+{
+    TRACELOG(LOG_WARNING, "SetWindowOpacity() not available on target platform");
+}
+
+// Set window focused
+void SetWindowFocused(void)
+{
+    TRACELOG(LOG_WARNING, "SetWindowFocused() not available on target platform");
+}
+
+// Get native window handle
+void *GetWindowHandle(void)
+{
+    TRACELOG(LOG_WARNING, "GetWindowHandle() not implemented on target platform");
+    return NULL;
+}
+
+// Get number of monitors
+int GetMonitorCount(void)
+{
+    TRACELOG(LOG_WARNING, "GetMonitorCount() not implemented on target platform");
+    return 1;
+}
+
+// Get number of monitors
+int GetCurrentMonitor(void)
+{
+    TRACELOG(LOG_WARNING, "GetCurrentMonitor() not implemented on target platform");
+    return 0;
+}
+
+// Get selected monitor position
+Vector2 GetMonitorPosition(int monitor)
+{
+    TRACELOG(LOG_WARNING, "GetMonitorPosition() not implemented on target platform");
+    return (Vector2){ 0, 0 };
+}
+
+// Get selected monitor width (currently used by monitor)
+int GetMonitorWidth(int monitor)
+{
+    TRACELOG(LOG_WARNING, "GetMonitorWidth() not implemented on target platform");
+    return 0;
+}
+
+// Get selected monitor height (currently used by monitor)
+int GetMonitorHeight(int monitor)
+{
+    TRACELOG(LOG_WARNING, "GetMonitorHeight() not implemented on target platform");
+    return 0;
+}
+
+// Get selected monitor physical width in millimetres
+int GetMonitorPhysicalWidth(int monitor)
+{
+    TRACELOG(LOG_WARNING, "GetMonitorPhysicalWidth() not implemented on target platform");
+    return 0;
+}
+
+// Get selected monitor physical height in millimetres
+int GetMonitorPhysicalHeight(int monitor)
+{
+    TRACELOG(LOG_WARNING, "GetMonitorPhysicalHeight() not implemented on target platform");
+    return 0;
+}
+
+// Get selected monitor refresh rate
+int GetMonitorRefreshRate(int monitor)
+{
+    TRACELOG(LOG_WARNING, "GetMonitorRefreshRate() not implemented on target platform");
+    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 target platform");
+    return "";
+}
+
+// Get window position XY on monitor
+Vector2 GetWindowPosition(void)
+{
+    TRACELOG(LOG_WARNING, "GetWindowPosition() not implemented on target platform");
+    return (Vector2){ 0, 0 };
+}
+
+// Get window scale DPI factor for current monitor
+Vector2 GetWindowScaleDPI(void)
+{
+    TRACELOG(LOG_WARNING, "GetWindowScaleDPI() not implemented on target platform");
+    return (Vector2){ 1.0f, 1.0f };
+}
+
+// Set clipboard text content
+void SetClipboardText(const char *text)
+{
+    TRACELOG(LOG_WARNING, "SetClipboardText() not implemented on target platform");
+}
+
+// Get clipboard text content
+// NOTE: returned string is allocated and freed by GLFW
+const char *GetClipboardText(void)
+{
+    TRACELOG(LOG_WARNING, "GetClipboardText() not implemented on target platform");
+    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 target platform
+    if (strchr(url, '\'') != NULL) TRACELOG(LOG_WARNING, "SYSTEM: Provided URL could be potentially malicious, avoid [\'] character");
+    else
+    {
+        // TODO:
+    }
+}
+
+//----------------------------------------------------------------------------------
+// Module Functions Definition: Inputs
+//----------------------------------------------------------------------------------
+
+// Set internal gamepad mappings
+int SetGamepadMappings(const char *mappings)
+{
+    TRACELOG(LOG_WARNING, "SetGamepadMappings() not implemented on target platform");
+    return 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;
+}
+
+// Set mouse cursor
+void SetMouseCursor(int cursor)
+{
+    TRACELOG(LOG_WARNING, "SetMouseCursor() not implemented on target platform");
+}
+
+// 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 target platform 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 platform
+}
+
+
+//----------------------------------------------------------------------------------
+// Module Internal Functions Definition
+//----------------------------------------------------------------------------------
+
+// Initialize platform: graphics, inputs and more
+int InitPlatform(void)
+{
+    // TODO: Initialize graphic device: display/window
+    // It usually requires setting up the platform display system configuration
+    // and connexion with the GPU through some system graphic API
+    // raylib uses OpenGL so, platform should create that kind of connection
+    // Below example illustrates that process using EGL library
+    //----------------------------------------------------------------------------
+    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 -1;
+    }
+
+    // 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);
+
+    // Android specific call
+    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);
+
+    EGLBoolean result = eglMakeCurrent(platform.device, platform.surface, platform.surface, platform.context);
+
+    // Check surface and context activation
+    if (result != EGL_FALSE)
+    {
+        CORE.Window.ready = true;
+
+        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);
+    }
+    else
+    {
+        TRACELOG(LOG_FATAL, "PLATFORM: Failed to initialize graphics device");
+        return -1;
+    }
+    //----------------------------------------------------------------------------
+
+    // If everything work as expected, we can continue
+    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);
+
+    // TODO: Load OpenGL extensions
+    // NOTE: GL procedures address loader is required to load extensions
+    //----------------------------------------------------------------------------
+    rlLoadExtensions(eglGetProcAddress);
+    //----------------------------------------------------------------------------
+
+    // TODO: Initialize input events system
+    // It could imply keyboard, mouse, gamepad, touch...
+    // Depending on the platform libraries/SDK it could use a callback mechanism
+    // For system events and inputs evens polling on a per-frame basis, use PollInputEvents()
+    //----------------------------------------------------------------------------
+    // ...
+    //----------------------------------------------------------------------------
+
+    // TODO: Initialize timing system
+    //----------------------------------------------------------------------------
+    InitTimer();
+    //----------------------------------------------------------------------------
+
+    // TODO: Initialize storage system
+    //----------------------------------------------------------------------------
+    CORE.Storage.basePath = GetWorkingDirectory();
+    //----------------------------------------------------------------------------
+
+    TRACELOG(LOG_INFO, "PLATFORM: CUSTOM: Initialized successfully");
+
+    return 0;
+}
+
+// Close platform
+void ClosePlatform(void)
+{
+    // TODO: De-initialize graphics, inputs and more
+}
+
+// EOF