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updated touch input handling by adding multitouch support

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MULTidll 2025-11-17 21:55:53 +05:30
parent 2f783f43cb
commit ffd1717b42
1 changed files with 111 additions and 26 deletions
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137
src/platforms/rcore_drm.c
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@ -261,6 +261,7 @@ static void ConfigureEvdevDevice(char *device); // Identifies a input device and
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 void CompactTouchPoints(void); // Compact touch points array after touch removal
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
@ -1900,6 +1901,9 @@ static void InitEvdevInput(void)
platform.touchActive[i] = false;
}
// Initialize touch slot
platform.touchSlot = 0;
// Reset keyboard key state
for (int i = 0; i < MAX_KEYBOARD_KEYS; i++)
{
@ -2291,7 +2295,17 @@ static void PollMouseEvents(void)
if (event.code == ABS_X)
{
CORE.Input.Mouse.currentPosition.x = (event.value - platform.absRange.x)*CORE.Window.screen.width/platform.absRange.width; // Scale according to absRange
if (platform.touchActive[0]) CORE.Input.Touch.position[0].x = (event.value - platform.absRange.x)*CORE.Window.screen.width/platform.absRange.width; // Scale according to absRange
bool hasMultitouch = false;
for (int i = 1; i < MAX_TOUCH_POINTS; i++) {
if (platform.touchActive[i]) {
hasMultitouch = true;
break;
}
}
if (!hasMultitouch && platform.touchActive[0]) {
CORE.Input.Touch.position[0].x = (event.value - platform.absRange.x)*CORE.Window.screen.width/platform.absRange.width;
}
touchAction = 2; // TOUCH_ACTION_MOVE
}
@ -2299,7 +2313,17 @@ static void PollMouseEvents(void)
if (event.code == ABS_Y)
{
CORE.Input.Mouse.currentPosition.y = (event.value - platform.absRange.y)*CORE.Window.screen.height/platform.absRange.height; // Scale according to absRange
if (platform.touchActive[0]) CORE.Input.Touch.position[0].y = (event.value - platform.absRange.y)*CORE.Window.screen.height/platform.absRange.height; // Scale according to absRange
bool hasMultitouch = false;
for (int i = 1; i < MAX_TOUCH_POINTS; i++) {
if (platform.touchActive[i]) {
hasMultitouch = true;
break;
}
}
if (!hasMultitouch && platform.touchActive[0]) {
CORE.Input.Touch.position[0].y = (event.value - platform.absRange.y)*CORE.Window.screen.height/platform.absRange.height;
}
touchAction = 2; // TOUCH_ACTION_MOVE
}
@ -2309,12 +2333,16 @@ static void PollMouseEvents(void)
if (event.code == ABS_MT_POSITION_X)
{
if (platform.touchSlot < MAX_TOUCH_POINTS && platform.touchActive[platform.touchSlot]) CORE.Input.Touch.position[platform.touchSlot].x = (event.value - platform.absRange.x)*CORE.Window.screen.width/platform.absRange.width; // Scale according to absRange
if (platform.touchSlot < MAX_TOUCH_POINTS && platform.touchActive[platform.touchSlot]) {
CORE.Input.Touch.position[platform.touchSlot].x = (event.value - platform.absRange.x)*CORE.Window.screen.width/platform.absRange.width;
}
}
if (event.code == ABS_MT_POSITION_Y)
{
if (platform.touchSlot < MAX_TOUCH_POINTS && platform.touchActive[platform.touchSlot]) CORE.Input.Touch.position[platform.touchSlot].y = (event.value - platform.absRange.y)*CORE.Window.screen.height/platform.absRange.height; // Scale according to absRange
if (platform.touchSlot < MAX_TOUCH_POINTS && platform.touchActive[platform.touchSlot]) {
CORE.Input.Touch.position[platform.touchSlot].y = (event.value - platform.absRange.y)*CORE.Window.screen.height/platform.absRange.height;
}
}
if (event.code == ABS_MT_TRACKING_ID)
@ -2332,6 +2360,8 @@ static void PollMouseEvents(void)
platform.touchActive[platform.touchSlot] = false;
CORE.Input.Touch.position[platform.touchSlot].x = -1;
CORE.Input.Touch.position[platform.touchSlot].y = -1;
CompactTouchPoints();
}
}
}
@ -2341,20 +2371,30 @@ static void PollMouseEvents(void)
{
int previousMouseLeftButtonState = platform.currentButtonStateEvdev[MOUSE_BUTTON_LEFT];
if (!event.value && previousMouseLeftButtonState)
{
platform.currentButtonStateEvdev[MOUSE_BUTTON_LEFT] = 0;
platform.touchActive[0] = false;
CORE.Input.Touch.position[0].x = -1;
CORE.Input.Touch.position[0].y = -1;
touchAction = 0; // TOUCH_ACTION_UP
bool hasMultitouch = false;
for (int i = 1; i < MAX_TOUCH_POINTS; i++) {
if (platform.touchActive[i]) {
hasMultitouch = true;
break;
}
}
if (event.value && !previousMouseLeftButtonState)
{
platform.currentButtonStateEvdev[MOUSE_BUTTON_LEFT] = 1;
platform.touchActive[0] = true;
touchAction = 1; // TOUCH_ACTION_DOWN
if (!hasMultitouch) {
if (!event.value && previousMouseLeftButtonState)
{
platform.currentButtonStateEvdev[MOUSE_BUTTON_LEFT] = 0;
platform.touchActive[0] = false;
CORE.Input.Touch.position[0].x = -1;
CORE.Input.Touch.position[0].y = -1;
touchAction = 0; // TOUCH_ACTION_UP
}
if (event.value && !previousMouseLeftButtonState)
{
platform.currentButtonStateEvdev[MOUSE_BUTTON_LEFT] = 1;
platform.touchActive[0] = true;
touchAction = 1; // TOUCH_ACTION_DOWN
}
}
}
@ -2368,17 +2408,27 @@ static void PollMouseEvents(void)
{
platform.currentButtonStateEvdev[MOUSE_BUTTON_LEFT] = event.value;
if (event.value > 0)
{
platform.touchActive[0] = true;
touchAction = 1; // TOUCH_ACTION_DOWN
bool hasMultitouch = false;
for (int i = 1; i < MAX_TOUCH_POINTS; i++) {
if (platform.touchActive[i]) {
hasMultitouch = true;
break;
}
}
else
{
platform.touchActive[0] = false;
CORE.Input.Touch.position[0].x = -1;
CORE.Input.Touch.position[0].y = -1;
touchAction = 0; // TOUCH_ACTION_UP
if (!hasMultitouch) {
if (event.value > 0)
{
platform.touchActive[0] = true;
touchAction = 1; // TOUCH_ACTION_DOWN
}
else
{
platform.touchActive[0] = false;
CORE.Input.Touch.position[0].x = -1;
CORE.Input.Touch.position[0].y = -1;
touchAction = 0; // TOUCH_ACTION_UP
}
}
}
@ -2407,6 +2457,14 @@ static void PollMouseEvents(void)
if (platform.touchActive[i]) CORE.Input.Touch.pointCount++;
}
// Debug logging for touch state (can be removed later)
if (touchAction > -1) {
TRACELOG(LOG_DEBUG, "TOUCH: Action=%d, Count=%d, Active=[%d,%d,%d,%d,%d,%d,%d,%d]",
touchAction, CORE.Input.Touch.pointCount,
platform.touchActive[0], platform.touchActive[1], platform.touchActive[2], platform.touchActive[3],
platform.touchActive[4], platform.touchActive[5], platform.touchActive[6], platform.touchActive[7]);
}
#if defined(SUPPORT_GESTURES_SYSTEM)
if (touchAction > -1)
{
@ -2429,6 +2487,33 @@ static void PollMouseEvents(void)
}
}
// Compact touch points to remove gaps when touches are removed
static void CompactTouchPoints(void)
{
// This function ensures that active touch points are contiguous
// starting from index 0, which helps with proper touch counting
int writeIndex = 0;
for (int readIndex = 0; readIndex < MAX_TOUCH_POINTS; readIndex++)
{
if (platform.touchActive[readIndex])
{
if (writeIndex != readIndex)
{
// Move the active touch point to fill the gap
platform.touchActive[writeIndex] = true;
CORE.Input.Touch.position[writeIndex] = CORE.Input.Touch.position[readIndex];
// Clear the old position
platform.touchActive[readIndex] = false;
CORE.Input.Touch.position[readIndex].x = -1;
CORE.Input.Touch.position[readIndex].y = -1;
}
writeIndex++;
}
}
}
// Search matching DRM mode in connector's mode list
static int FindMatchingConnectorMode(const drmModeConnector *connector, const drmModeModeInfo *mode)
{