131 lines
4.5 KiB
Objective-C
131 lines
4.5 KiB
Objective-C
//
|
|
// NativeTouchHandler.m
|
|
// Moonlight
|
|
//
|
|
// Created by ZWM on 2024/5/14.
|
|
// Copyright © 2024 Moonlight Game Streaming Project. All rights reserved.
|
|
//
|
|
|
|
#import <Foundation/Foundation.h>
|
|
#import "NativeTouchHandler.h"
|
|
#include <Limelight.h>
|
|
|
|
|
|
// Use a Dictionary to store UITouch object's memory address as key, and pointerId as value,字典存放UITouch对象地址和pointerId映射关系
|
|
// pointerId will be generated from electronic noise, by arc4_random, pointerId,由随机噪声生成
|
|
// Use a NSSet store pointerId, for quick repeition inquiry, NSSet存放活跃的pointerId合集,用于快速查找,以防重复.
|
|
static NSMutableDictionary *pointerIdDict; //pointerId Dict for native touch.
|
|
static NSMutableSet<NSNumber *> *pointerIdSet; //pointerIdSet for native touch.
|
|
static NSMutableDictionary *pointerDict;
|
|
|
|
static CGFloat pointerVelocityFactor = 0.7;
|
|
static CGFloat pointerVelocityDivider = 0.5;
|
|
static CGFloat pointerVelocityDividerLocation;
|
|
|
|
StreamView *streamView;
|
|
|
|
@implementation TouchPointer{
|
|
CGPoint initialPoint;
|
|
CGPoint latestPoint;
|
|
CGPoint previousPoint;
|
|
CGPoint latestRelativePoint;
|
|
CGPoint previousRelativePoint;
|
|
CGFloat velocityX;
|
|
CGFloat velocityY;
|
|
}
|
|
|
|
- (instancetype)initWith:(UITouch *)touch{
|
|
self = [self init];
|
|
self->initialPoint = [touch locationInView:streamView];
|
|
self->latestPoint = self->initialPoint;
|
|
self->latestRelativePoint = self->initialPoint;
|
|
return self;
|
|
}
|
|
|
|
- (void)updatePointerCoords:(UITouch *)touch{
|
|
previousPoint = latestPoint;
|
|
latestPoint = [touch locationInView:streamView];
|
|
if (pointerVelocityFactor != 1.0f){
|
|
velocityX = latestPoint.x - previousPoint.x;
|
|
velocityY = latestPoint.y - previousPoint.y;
|
|
previousRelativePoint = latestRelativePoint;
|
|
latestRelativePoint.x = previousRelativePoint.x + pointerVelocityFactor * velocityX;
|
|
latestRelativePoint.y = previousRelativePoint.y + pointerVelocityFactor * velocityY;
|
|
}
|
|
}
|
|
|
|
+ (void)initContextWith:(StreamView *)view{
|
|
streamView = view;
|
|
pointerIdDict = [NSMutableDictionary dictionary];
|
|
pointerIdSet = [NSMutableSet set];
|
|
pointerDict = [NSMutableDictionary dictionary];
|
|
pointerVelocityDividerLocation = CGRectGetHeight([[UIScreen mainScreen] bounds]) *pointerVelocityDivider;
|
|
}
|
|
|
|
+ (void)populatePointerObjIntoDict:(UITouch*)touch{
|
|
[pointerDict setObject:[[TouchPointer alloc] initWith:touch] forKey:@((uint64_t)touch)];
|
|
}
|
|
|
|
+ (void)removePointerObjFromDict:(UITouch*)touch{
|
|
uint64_t eventAddrValue = (uint64_t)touch;
|
|
TouchPointer* pointer = [pointerDict objectForKey:@(eventAddrValue)];
|
|
if(pointer != nil){
|
|
[pointerDict removeObjectForKey:@(eventAddrValue)];
|
|
}
|
|
|
|
}
|
|
|
|
+ (void)updatePointerObjInDict:(UITouch *)touch{
|
|
[[pointerDict objectForKey:@((uint64_t)touch)] updatePointerCoords:touch];
|
|
}
|
|
|
|
|
|
+ (CGPoint)selectCoordsFor:(UITouch *)touch{
|
|
if (pointerVelocityFactor != 1.0f){
|
|
TouchPointer *pointer = [pointerDict objectForKey:@((uint64_t)touch)];
|
|
if((pointer -> initialPoint).x > pointerVelocityDividerLocation){
|
|
return pointer->latestRelativePoint;
|
|
}
|
|
}
|
|
return [touch locationInView:streamView];
|
|
}
|
|
|
|
|
|
|
|
// 随机生成pointerId并填入NSDict和NSSet
|
|
// generate & populate pointerId into NSDict & NSSet, called in UITouchPhaseBegan
|
|
+ (void)populatePointerId:(UITouch*)touch{
|
|
uint64_t eventAddrValue = (uint64_t)touch;
|
|
uint32_t randomPointerId = arc4random_uniform(UINT32_MAX); // generate pointerId from eletronic noise.
|
|
while(true){
|
|
if([pointerIdSet containsObject:@(randomPointerId)]) randomPointerId = arc4random_uniform(UINT32_MAX); // in case of new pointerId collides with existing ones, generate again.
|
|
else{ // populate pointerId into NSDict & NSSet.
|
|
[pointerIdDict setObject:@(randomPointerId) forKey:@(eventAddrValue)];
|
|
[pointerIdSet addObject:@(randomPointerId)];
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
|
|
// remove pointerId in UITouchPhaseEnded condition
|
|
+ (void)removePointerId:(UITouch*)touch{
|
|
uint64_t eventAddrValue = (uint64_t)touch;
|
|
NSNumber* pointerIdObj = [pointerIdDict objectForKey:@(eventAddrValue)];
|
|
if(pointerIdObj != nil){
|
|
[pointerIdSet removeObject:pointerIdObj];
|
|
[pointerIdDict removeObjectForKey:@(eventAddrValue)];
|
|
}
|
|
}
|
|
|
|
// 从字典中获取UITouch事件对应的pointerId
|
|
// call this only when NSDcit & NSSet is up-to-date.
|
|
+ (uint32_t) retrievePointerIdFromDict:(UITouch*)touch{
|
|
return [[pointerIdDict objectForKey:@((uint64_t)touch)] unsignedIntValue];
|
|
}
|
|
|
|
|
|
|
|
@end
|