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rcore_drm.c
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rcore_drm.c
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/**********************************************************************************************
*
* rcore_drm - Functions to manage window, graphics device and inputs
*
* PLATFORM: DRM
* - Raspberry Pi 0-5 (DRM/KMS)
* - Linux DRM subsystem (KMS mode)
*
* LIMITATIONS:
* - Most of the window/monitor functions are not implemented (not required)
*
* POSSIBLE IMPROVEMENTS:
* - Improvement 01
* - Improvement 02
*
* ADDITIONAL NOTES:
* - TRACELOG() function is located in raylib [utils] module
*
* CONFIGURATION:
* #define SUPPORT_SSH_KEYBOARD_RPI (Raspberry Pi only)
* Reconfigure standard input to receive key inputs, works with SSH connection.
* WARNING: Reconfiguring standard input could lead to undesired effects, like breaking other
* running processes orblocking the device if not restored properly. Use with care.
*
* DEPENDENCIES:
* - DRM and GLM: System libraries for display initialization and configuration
* - 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.
*
**********************************************************************************************/
#include <fcntl.h> // POSIX file control definitions - open(), creat(), fcntl()
#include <unistd.h> // POSIX standard function definitions - read(), close(), STDIN_FILENO
#include <termios.h> // POSIX terminal control definitions - tcgetattr(), tcsetattr()
#include <pthread.h> // POSIX threads management (inputs reading)
#include <dirent.h> // POSIX directory browsing
#include <sys/ioctl.h> // Required for: ioctl() - UNIX System call for device-specific input/output operations
#include <linux/kd.h> // Linux: KDSKBMODE, K_MEDIUMRAM constants definition
#include <linux/input.h> // Linux: Keycodes constants definition (KEY_A, ...)
#include <linux/joystick.h> // Linux: Joystick support library
// WARNING: Both 'linux/input.h' and 'raylib.h' define KEY_F12
// To avoid conflict with the capturing code in rcore.c we undefine the macro KEY_F12,
// so the enum KEY_F12 from raylib is used
#undef KEY_F12
#include <gbm.h> // Generic Buffer Management (native platform for EGL on DRM)
#include <xf86drm.h> // Direct Rendering Manager user-level library interface
#include <xf86drmMode.h> // Direct Rendering Manager mode setting (KMS) interface
#include "EGL/egl.h" // Native platform windowing system interface
#include "EGL/eglext.h" // EGL extensions
#ifndef EGL_OPENGL_ES3_BIT
#define EGL_OPENGL_ES3_BIT 0x40
#endif
//----------------------------------------------------------------------------------
// Defines and Macros
//----------------------------------------------------------------------------------
#define USE_LAST_TOUCH_DEVICE // When multiple touchscreens are connected, only use the one with the highest event<N> number
#define DEFAULT_EVDEV_PATH "/dev/input/" // Path to the linux input events
// So actually the biggest key is KEY_CNT but we only really map the keys up to
// KEY_ALS_TOGGLE
#define KEYMAP_SIZE KEY_ALS_TOGGLE
//----------------------------------------------------------------------------------
// Types and Structures Definition
//----------------------------------------------------------------------------------
typedef struct {
// Display data
int fd; // File descriptor for /dev/dri/...
drmModeConnector *connector; // Direct Rendering Manager (DRM) mode connector
drmModeCrtc *crtc; // CRT Controller
int modeIndex; // Index of the used mode of connector->modes
struct gbm_device *gbmDevice; // GBM device
struct gbm_surface *gbmSurface; // GBM surface
struct gbm_bo *prevBO; // Previous GBM buffer object (during frame swapping)
uint32_t prevFB; // Previous GBM framebufer (during frame swapping)
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
// Keyboard data
int defaultKeyboardMode; // Default keyboard mode
bool eventKeyboardMode; // Keyboard in event mode
int defaultFileFlags; // Default IO file flags
struct termios defaultSettings; // Default keyboard settings
int keyboardFd; // File descriptor for the evdev keyboard
// Mouse data
Vector2 eventWheelMove; // Registers the event mouse wheel variation
// NOTE: currentButtonState[] can't be written directly due to multithreading, app could miss the update
char currentButtonStateEvdev[MAX_MOUSE_BUTTONS]; // Holds the new mouse state for the next polling event to grab
bool cursorRelative; // Relative cursor mode
int mouseFd; // File descriptor for the evdev mouse/touch/gestures
Rectangle absRange; // Range of values for absolute pointing devices (touchscreens)
int touchSlot; // Hold the touch slot number of the currently being sent multitouch block
// Gamepad data
int gamepadStreamFd[MAX_GAMEPADS]; // Gamepad device file descriptor
int gamepadAbsAxisRange[MAX_GAMEPADS][MAX_GAMEPAD_AXIS][2]; // [0] = min, [1] = range value of the axis
int gamepadAbsAxisMap[MAX_GAMEPADS][ABS_CNT]; // Maps the axes gamepads from the evdev api to a sequential one
int gamepadCount; // The number of gamepads registered
} PlatformData;
//----------------------------------------------------------------------------------
// Global Variables Definition
//----------------------------------------------------------------------------------
extern CoreData CORE; // Global CORE state context
static PlatformData platform = { 0 }; // Platform specific data
//----------------------------------------------------------------------------------
// Local Variables Definition
//----------------------------------------------------------------------------------
// NOTE: The complete evdev EV_KEY list can be found at /usr/include/linux/input-event-codes.h
// TODO: Complete the LUT with all unicode decimal values
// TODO: Replace this with a keymap from the X11 to get the correct regional map for the keyboard:
// Currently non US keyboards will have the wrong mapping for some keys
// NOTE: Replacing this with the keymap from X11 would probably be useless, as people use the drm
// backend to *avoid* X11
static const int evkeyToUnicodeLUT[] = {
0, 27, 49, 50, 51, 52, 53, 54, 55, 56, 57, 48, 45, 61, 8, 0, 113, 119, 101, 114,
116, 121, 117, 105, 111, 112, 0, 0, 13, 0, 97, 115, 100, 102, 103, 104, 106, 107, 108, 59,
39, 96, 0, 92, 122, 120, 99, 118, 98, 110, 109, 44, 46, 47, 0, 0, 0, 32
// LUT currently incomplete, just mapped the most essential keys
};
// This is the map used to map any keycode returned from linux to a raylib code from 'raylib.h'
// NOTE: Use short here to save a little memory
static const short linuxToRaylibMap[KEYMAP_SIZE] = {
// We don't map those with designated initialization, because we would getting
// into loads of naming conflicts
0, 256, 49, 50, 51, 52, 53, 54,
55, 56, 57, 48, 45, 61, 259, 258,
81, 87, 69, 82, 84, 89, 85, 73,
79, 80, 91, 93, 257, 341, 65, 83,
68, 70, 71, 72, 74, 75, 76, 59,
39, 96, 340, 92, 90, 88, 67, 86,
66, 78, 77, 44, 46, 47, 344, 332,
342, 32, 280, 290, 291, 292, 293, 294,
295, 296, 297, 298, 299, 282, 281, 327,
328, 329, 333, 324, 325, 326, 334, 321,
322, 323, 320, 330, 0, 85, 86, 300,
301, 89, 90, 91, 92, 93, 94, 95,
335, 345, 331, 283, 346, 101, 268, 265,
266, 263, 262, 269, 264, 267, 260, 261,
112, 113, 114, 115, 116, 117, 118, 119,
120, 121, 122, 123, 124, 125, 347, 127,
128, 129, 130, 131, 132, 133, 134, 135,
136, 137, 138, 139, 140, 141, 142, 143,
144, 145, 146, 147, 148, 149, 150, 151,
152, 153, 154, 155, 156, 157, 158, 159,
160, 161, 162, 163, 164, 165, 166, 167,
168, 169, 170, 171, 172, 173, 174, 175,
176, 177, 178, 179, 180, 181, 182, 183,
184, 185, 186, 187, 188, 189, 190, 191,
192, 193, 194, 0, 0, 0, 0, 0,
200, 201, 202, 203, 204, 205, 206, 207,
208, 209, 210, 211, 212, 213, 214, 215,
216, 217, 218, 219, 220, 221, 222, 223,
224, 225, 226, 227, 228, 229, 230, 231,
232, 233, 234, 235, 236, 237, 238, 239,
240, 241, 242, 243, 244, 245, 246, 247,
248, 0, 0, 0, 0, 0, 0, 0,
// Gamepads are mapped according to:
// https://www.kernel.org/doc/html/next/input/gamepad.html
// Those mappings are standardized, but that doesn't mean people follow
// the standards, so this is more of an approximation
[BTN_DPAD_UP] = GAMEPAD_BUTTON_LEFT_FACE_UP,
[BTN_DPAD_RIGHT] = GAMEPAD_BUTTON_LEFT_FACE_RIGHT,
[BTN_DPAD_DOWN] = GAMEPAD_BUTTON_LEFT_FACE_DOWN,
[BTN_DPAD_LEFT] = GAMEPAD_BUTTON_LEFT_FACE_LEFT,
[BTN_Y] = GAMEPAD_BUTTON_RIGHT_FACE_UP,
[BTN_B] = GAMEPAD_BUTTON_RIGHT_FACE_RIGHT,
[BTN_A] = GAMEPAD_BUTTON_RIGHT_FACE_DOWN,
[BTN_X] = GAMEPAD_BUTTON_RIGHT_FACE_LEFT,
[BTN_TL] = GAMEPAD_BUTTON_LEFT_TRIGGER_1,
[BTN_TL2] = GAMEPAD_BUTTON_LEFT_TRIGGER_2,
[BTN_TR] = GAMEPAD_BUTTON_RIGHT_TRIGGER_1,
[BTN_TR2] = GAMEPAD_BUTTON_RIGHT_TRIGGER_2,
[BTN_SELECT] = GAMEPAD_BUTTON_MIDDLE_LEFT,
[BTN_MODE] = GAMEPAD_BUTTON_MIDDLE,
[BTN_START] = GAMEPAD_BUTTON_MIDDLE_RIGHT,
[BTN_THUMBL] = GAMEPAD_BUTTON_LEFT_THUMB,
[BTN_THUMBR] = GAMEPAD_BUTTON_RIGHT_THUMB,
};
//----------------------------------------------------------------------------------
// Module Internal Functions Declaration
//----------------------------------------------------------------------------------
int InitPlatform(void); // Initialize platform (graphics, inputs and more)
void ClosePlatform(void); // Close platform
#if defined(SUPPORT_SSH_KEYBOARD_RPI)
static void InitKeyboard(void); // Initialize raw keyboard system
static void RestoreKeyboard(void); // Restore keyboard system
static void ProcessKeyboard(void); // Process keyboard events
#endif
static void InitEvdevInput(void); // Initialize evdev inputs
static void ConfigureEvdevDevice(char *device); // Identifies a input device and configures it for use if appropriate
static void PollKeyboardEvents(void); // Process evdev keyboard events
static void PollGamepadEvents(void); // Process evdev gamepad events
static void PollMouseEvents(void); // Process evdev mouse events
static int FindMatchingConnectorMode(const drmModeConnector *connector, const drmModeModeInfo *mode); // Search matching DRM mode in connector's mode list
static int FindExactConnectorMode(const drmModeConnector *connector, uint width, uint height, uint fps, bool allowInterlaced); // Search exactly matching DRM connector mode in connector's list
static int FindNearestConnectorMode(const drmModeConnector *connector, uint width, uint height, uint fps, bool allowInterlaced); // Search the nearest matching DRM connector mode in connector's list
//----------------------------------------------------------------------------------
// Module Functions Declaration
//----------------------------------------------------------------------------------
// NOTE: Functions declaration is provided by raylib.h
//----------------------------------------------------------------------------------
// Module Functions Definition: Window and Graphics Device
//----------------------------------------------------------------------------------
// Check if application should close
// NOTE: By default, if KEY_ESCAPE pressed
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)
{
int width = 0;
if (monitor != 0)
{
TRACELOG(LOG_WARNING, "GetMonitorWidth() implemented for first monitor only");
}
else if ((platform.connector) && (platform.modeIndex >= 0))
{
width = platform.connector->modes[platform.modeIndex].hdisplay;
}
return width;
}
// Get selected monitor height (currently used by monitor)
int GetMonitorHeight(int monitor)
{
int height = 0;
if (monitor != 0)
{
TRACELOG(LOG_WARNING, "GetMonitorHeight() implemented for first monitor only");
}
else if ((platform.connector) && (platform.modeIndex >= 0))
{
height = platform.connector->modes[platform.modeIndex].vdisplay;
}
return height;
}
// Get selected monitor physical width in millimetres
int GetMonitorPhysicalWidth(int monitor)
{
int physicalWidth = 0;
if (monitor != 0)
{
TRACELOG(LOG_WARNING, "GetMonitorPhysicalWidth() implemented for first monitor only");
}
else if ((platform.connector) && (platform.modeIndex >= 0))
{
physicalWidth = platform.connector->mmWidth;
}
return physicalWidth;
}
// Get selected monitor physical height in millimetres
int GetMonitorPhysicalHeight(int monitor)
{
int physicalHeight = 0;
if (monitor != 0)
{
TRACELOG(LOG_WARNING, "GetMonitorPhysicalHeight() implemented for first monitor only");
}
else if ((platform.connector) && (platform.modeIndex >= 0))
{
physicalHeight = platform.connector->mmHeight;
}
return physicalHeight;
}
// Get selected monitor refresh rate
int GetMonitorRefreshRate(int monitor)
{
int refresh = 0;
if ((platform.connector) && (platform.modeIndex >= 0))
{
refresh = platform.connector->modes[platform.modeIndex].vrefresh;
}
return refresh;
}
// Get the human-readable, UTF-8 encoded name of the selected monitor
const char *GetMonitorName(int monitor)
{
const char *name = "";
if (monitor != 0)
{
TRACELOG(LOG_WARNING, "GetMonitorName() implemented for first monitor only");
}
else if ((platform.connector) && (platform.modeIndex >= 0))
{
name = platform.connector->modes[platform.modeIndex].name;
}
return name;
}
// Get window position XY on monitor
Vector2 GetWindowPosition(void)
{
return (Vector2){ 0, 0 };
}
// Get window scale DPI factor for current monitor
Vector2 GetWindowScaleDPI(void)
{
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);
platform.cursorRelative = false;
CORE.Input.Mouse.cursorHidden = false;
}
// Disables cursor (lock cursor)
void DisableCursor(void)
{
// Set cursor position in the middle
SetMousePosition(0, 0);
platform.cursorRelative = true;
CORE.Input.Mouse.cursorHidden = true;
}
// Swap back buffer with front buffer (screen drawing)
void SwapScreenBuffer(void)
{
eglSwapBuffers(platform.device, platform.surface);
if (!platform.gbmSurface || (-1 == platform.fd) || !platform.connector || !platform.crtc) TRACELOG(LOG_ERROR, "DISPLAY: DRM initialization failed to swap");
struct gbm_bo *bo = gbm_surface_lock_front_buffer(platform.gbmSurface);
if (!bo) TRACELOG(LOG_ERROR, "DISPLAY: Failed GBM to lock front buffer");
uint32_t fb = 0;
int result = drmModeAddFB(platform.fd, platform.connector->modes[platform.modeIndex].hdisplay, platform.connector->modes[platform.modeIndex].vdisplay, 24, 32, gbm_bo_get_stride(bo), gbm_bo_get_handle(bo).u32, &fb);
if (result != 0) TRACELOG(LOG_ERROR, "DISPLAY: drmModeAddFB() failed with result: %d", result);
result = drmModeSetCrtc(platform.fd, platform.crtc->crtc_id, fb, 0, 0, &platform.connector->connector_id, 1, &platform.connector->modes[platform.modeIndex]);
if (result != 0) TRACELOG(LOG_ERROR, "DISPLAY: drmModeSetCrtc() failed with result: %d", result);
if (platform.prevFB)
{
result = drmModeRmFB(platform.fd, platform.prevFB);
if (result != 0) TRACELOG(LOG_ERROR, "DISPLAY: drmModeRmFB() failed with result: %d", result);
}
platform.prevFB = fb;
if (platform.prevBO) gbm_surface_release_buffer(platform.gbmSurface, platform.prevBO);
platform.prevBO = bo;
}
//----------------------------------------------------------------------------------
// 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)
{
TRACELOG(LOG_WARNING, "OpenURL() not implemented on target platform");
}
//----------------------------------------------------------------------------------
// 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 gamepad vibration
void SetGamepadVibration(int gamepad, float leftMotor, float rightMotor)
{
TRACELOG(LOG_WARNING, "GamepadSetVibration() not implemented on target platform");
}
// 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");
}
// Get physical key name.
const char *GetKeyName(int key)
{
TRACELOG(LOG_WARNING, "GetKeyName() not implemented on target platform");
return "";
}
// 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 last gamepad button/axis registered state
CORE.Input.Gamepad.lastButtonPressed = 0; // GAMEPAD_BUTTON_UNKNOWN
//CORE.Input.Gamepad.axisCount = 0;
// Register previous keys states
for (int i = 0; i < MAX_KEYBOARD_KEYS; i++)
{
CORE.Input.Keyboard.previousKeyState[i] = CORE.Input.Keyboard.currentKeyState[i];
CORE.Input.Keyboard.keyRepeatInFrame[i] = 0;
}
PollKeyboardEvents();
#if defined(SUPPORT_SSH_KEYBOARD_RPI)
// NOTE: Keyboard reading could be done using input_event(s) or just read from stdin, both methods are used here.
// stdin reading is still used for legacy purposes, it allows keyboard input trough SSH console
if (!platform.eventKeyboardMode) ProcessKeyboard();
#endif
// Check exit key
if (CORE.Input.Keyboard.currentKeyState[CORE.Input.Keyboard.exitKey] == 1) CORE.Window.shouldClose = true;
// Register previous mouse position
if (platform.cursorRelative) CORE.Input.Mouse.currentPosition = (Vector2){ 0.0f, 0.0f };
else CORE.Input.Mouse.previousPosition = CORE.Input.Mouse.currentPosition;
// Register previous mouse states
CORE.Input.Mouse.previousWheelMove = CORE.Input.Mouse.currentWheelMove;
CORE.Input.Mouse.currentWheelMove = platform.eventWheelMove;
platform.eventWheelMove = (Vector2){ 0.0f, 0.0f };
for (int i = 0; i < MAX_MOUSE_BUTTONS; i++)
{
CORE.Input.Mouse.previousButtonState[i] = CORE.Input.Mouse.currentButtonState[i];
CORE.Input.Mouse.currentButtonState[i] = platform.currentButtonStateEvdev[i];
CORE.Input.Touch.currentTouchState[i] = platform.currentButtonStateEvdev[i];
}
// Register gamepads buttons events
PollGamepadEvents();
// 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
//for (int i = 0; i < MAX_TOUCH_POINTS; i++) CORE.Input.Touch.position[i] = (Vector2){ 0, 0 };
// Map touch position to mouse position for convenience
CORE.Input.Touch.position[0] = CORE.Input.Mouse.currentPosition;
// Handle the mouse/touch/gestures events:
PollMouseEvents();
}
//----------------------------------------------------------------------------------
// Module Internal Functions Definition
//----------------------------------------------------------------------------------
// Initialize platform: graphics, inputs and more
int InitPlatform(void)
{
platform.fd = -1;
platform.connector = NULL;
platform.modeIndex = -1;
platform.crtc = NULL;
platform.gbmDevice = NULL;
platform.gbmSurface = NULL;
platform.prevBO = NULL;
platform.prevFB = 0;
// Initialize graphic device: display/window and graphic context
//----------------------------------------------------------------------------
CORE.Window.fullscreen = true;
CORE.Window.flags |= FLAG_FULLSCREEN_MODE;
#if defined(DEFAULT_GRAPHIC_DEVICE_DRM)
platform.fd = open(DEFAULT_GRAPHIC_DEVICE_DRM, O_RDWR);
#else
TRACELOG(LOG_INFO, "DISPLAY: No graphic card set, trying platform-gpu-card");
platform.fd = open("/dev/dri/by-path/platform-gpu-card", O_RDWR); // VideoCore VI (Raspberry Pi 4)
if ((platform.fd == -1) || (drmModeGetResources(platform.fd) == NULL))
{
TRACELOG(LOG_INFO, "DISPLAY: Failed to open platform-gpu-card, trying card1");
platform.fd = open("/dev/dri/card1", O_RDWR); // Other Embedded
}
if ((platform.fd == -1) || (drmModeGetResources(platform.fd) == NULL))
{
TRACELOG(LOG_INFO, "DISPLAY: Failed to open graphic card1, trying card0");
platform.fd = open("/dev/dri/card0", O_RDWR); // VideoCore IV (Raspberry Pi 1-3)
}
#endif
if (platform.fd == -1)
{
TRACELOG(LOG_WARNING, "DISPLAY: Failed to open graphic card");
return -1;
}
drmModeRes *res = drmModeGetResources(platform.fd);
if (!res)
{
TRACELOG(LOG_WARNING, "DISPLAY: Failed get DRM resources");
return -1;
}
TRACELOG(LOG_TRACE, "DISPLAY: Connectors found: %i", res->count_connectors);
for (size_t i = 0; i < res->count_connectors; i++)
{
TRACELOG(LOG_TRACE, "DISPLAY: Connector index %i", i);
drmModeConnector *con = drmModeGetConnector(platform.fd, res->connectors[i]);
TRACELOG(LOG_TRACE, "DISPLAY: Connector modes detected: %i", con->count_modes);
// In certain cases the status of the conneciton is reported as UKNOWN, but it is still connected.
// This might be a hardware or software limitation like on Raspberry Pi Zero with composite output.
if (((con->connection == DRM_MODE_CONNECTED) || (con->connection == DRM_MODE_UNKNOWNCONNECTION)) && (con->encoder_id))
{
TRACELOG(LOG_TRACE, "DISPLAY: DRM mode connected");
platform.connector = con;
break;
}
else
{
TRACELOG(LOG_TRACE, "DISPLAY: DRM mode NOT connected (deleting)");
drmModeFreeConnector(con);
}
}
if (!platform.connector)
{
TRACELOG(LOG_WARNING, "DISPLAY: No suitable DRM connector found");
drmModeFreeResources(res);
return -1;
}
drmModeEncoder *enc = drmModeGetEncoder(platform.fd, platform.connector->encoder_id);
if (!enc)
{
TRACELOG(LOG_WARNING, "DISPLAY: Failed to get DRM mode encoder");
drmModeFreeResources(res);
return -1;
}
platform.crtc = drmModeGetCrtc(platform.fd, enc->crtc_id);
if (!platform.crtc)
{
TRACELOG(LOG_WARNING, "DISPLAY: Failed to get DRM mode crtc");
drmModeFreeEncoder(enc);
drmModeFreeResources(res);
return -1;
}
// If InitWindow should use the current mode find it in the connector's mode list
if ((CORE.Window.screen.width <= 0) || (CORE.Window.screen.height <= 0))
{
TRACELOG(LOG_TRACE, "DISPLAY: Selecting DRM connector mode for current used mode...");
platform.modeIndex = FindMatchingConnectorMode(platform.connector, &platform.crtc->mode);
if (platform.modeIndex < 0)
{
TRACELOG(LOG_WARNING, "DISPLAY: No matching DRM connector mode found");
drmModeFreeEncoder(enc);
drmModeFreeResources(res);
return -1;
}
CORE.Window.screen.width = CORE.Window.display.width;
CORE.Window.screen.height = CORE.Window.display.height;
}
const bool allowInterlaced = CORE.Window.flags & FLAG_INTERLACED_HINT;
const int fps = (CORE.Time.target > 0)? (1.0/CORE.Time.target) : 60;
// Try to find an exact matching mode
platform.modeIndex = FindExactConnectorMode(platform.connector, CORE.Window.screen.width, CORE.Window.screen.height, fps, allowInterlaced);
// If nothing found, try to find a nearly matching mode
if (platform.modeIndex < 0) platform.modeIndex = FindNearestConnectorMode(platform.connector, CORE.Window.screen.width, CORE.Window.screen.height, fps, allowInterlaced);
// If nothing found, try to find an exactly matching mode including interlaced
if (platform.modeIndex < 0) platform.modeIndex = FindExactConnectorMode(platform.connector, CORE.Window.screen.width, CORE.Window.screen.height, fps, true);
// If nothing found, try to find a nearly matching mode including interlaced
if (platform.modeIndex < 0) platform.modeIndex = FindNearestConnectorMode(platform.connector, CORE.Window.screen.width, CORE.Window.screen.height, fps, true);
// If nothing found, there is no suitable mode
if (platform.modeIndex < 0)
{
TRACELOG(LOG_WARNING, "DISPLAY: Failed to find a suitable DRM connector mode");
drmModeFreeEncoder(enc);
drmModeFreeResources(res);
return -1;
}
CORE.Window.display.width = platform.connector->modes[platform.modeIndex].hdisplay;
CORE.Window.display.height = platform.connector->modes[platform.modeIndex].vdisplay;
TRACELOG(LOG_INFO, "DISPLAY: Selected DRM connector mode %s (%ux%u%c@%u)", platform.connector->modes[platform.modeIndex].name,
platform.connector->modes[platform.modeIndex].hdisplay, platform.connector->modes[platform.modeIndex].vdisplay,
(platform.connector->modes[platform.modeIndex].flags & DRM_MODE_FLAG_INTERLACE)? 'i' : 'p',
platform.connector->modes[platform.modeIndex].vrefresh);
// Use the width and height of the surface for render
CORE.Window.render.width = CORE.Window.screen.width;
CORE.Window.render.height = CORE.Window.screen.height;
drmModeFreeEncoder(enc);
enc = NULL;
drmModeFreeResources(res);
res = NULL;
platform.gbmDevice = gbm_create_device(platform.fd);
if (!platform.gbmDevice)
{
TRACELOG(LOG_WARNING, "DISPLAY: Failed to create GBM device");
return -1;
}
platform.gbmSurface = gbm_surface_create(platform.gbmDevice, platform.connector->modes[platform.modeIndex].hdisplay,
platform.connector->modes[platform.modeIndex].vdisplay, GBM_FORMAT_ARGB8888, GBM_BO_USE_SCANOUT | GBM_BO_USE_RENDERING);
if (!platform.gbmSurface)
{
TRACELOG(LOG_WARNING, "DISPLAY: Failed to create GBM surface");
return -1;
}
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_SURFACE_TYPE, EGL_WINDOW_BIT, // Don't use it on Android!
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_ALPHA_SIZE, 8, // ALPHA bit depth (required for transparent framebuffer)
//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((EGLNativeDisplayType)platform.gbmDevice);
if (platform.device == EGL_NO_DISPLAY)
{
TRACELOG(LOG_WARNING, "DISPLAY: Failed to initialize EGL device");
return -1;
}
// 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 -1;
}
if (!eglChooseConfig(platform.device, NULL, NULL, 0, &numConfigs))
{
TRACELOG(LOG_WARNING, "DISPLAY: Failed to get EGL config count: 0x%x", eglGetError());
return -1;
}
TRACELOG(LOG_TRACE, "DISPLAY: EGL configs available: %d", numConfigs);
EGLConfig *configs = RL_CALLOC(numConfigs, sizeof(*configs));
if (!configs)
{
TRACELOG(LOG_WARNING, "DISPLAY: Failed to get memory for EGL configs");
return -1;
}
EGLint matchingNumConfigs = 0;
if (!eglChooseConfig(platform.device, framebufferAttribs, configs, numConfigs, &matchingNumConfigs))
{
TRACELOG(LOG_WARNING, "DISPLAY: Failed to choose EGL config: 0x%x", eglGetError());
free(configs);
return -1;
}
TRACELOG(LOG_TRACE, "DISPLAY: EGL matching configs available: %d", matchingNumConfigs);
// find the EGL config that matches the previously setup GBM format
int found = 0;
for (EGLint i = 0; i < matchingNumConfigs; ++i)
{
EGLint id = 0;
if (!eglGetConfigAttrib(platform.device, configs[i], EGL_NATIVE_VISUAL_ID, &id))
{
TRACELOG(LOG_WARNING, "DISPLAY: Failed to get EGL config attribute: 0x%x", eglGetError());
continue;
}
if (GBM_FORMAT_ARGB8888 == id)
{
TRACELOG(LOG_TRACE, "DISPLAY: Using EGL config: %d", i);
platform.config = configs[i];
found = 1;
break;
}
}
RL_FREE(configs);
if (!found)
{
TRACELOG(LOG_WARNING, "DISPLAY: Failed to find a suitable EGL config");
return -1;
}
// 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
platform.surface = eglCreateWindowSurface(platform.device, platform.config, (EGLNativeWindowType)platform.gbmSurface, NULL);
if (EGL_NO_SURFACE == platform.surface)
{
TRACELOG(LOG_WARNING, "DISPLAY: Failed to create EGL window surface: 0x%04x", eglGetError());
return -1;
}