init

1 year ago · d0a13c6838
--- a/src/platforms/rcore_ios.c
+++ b/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