libs/input/TouchSpotController.cpp - LeafOS-Project/android_frameworks_base - Gitiles

 /*
  * Copyright (C) 2020 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *      http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */

 #define LOG_TAG "TouchSpotController"

 // Log debug messages about pointer updates
 #define DEBUG_SPOT_UPDATES 0

 #include "TouchSpotController.h"

 #include <log/log.h>

 #include <SkBitmap.h>
 #include <SkBlendMode.h>
 #include <SkCanvas.h>
 #include <SkColor.h>
 #include <SkPaint.h>

 namespace {
 // Time to spend fading out the spot completely.
 const nsecs_t SPOT_FADE_DURATION = 200 * 1000000LL; // 200 ms
 } // namespace

 namespace android {

 // --- Spot ---

 void TouchSpotController::Spot::updateSprite(const SpriteIcon* icon, float x, float y,
                                              int32_t displayId) {
     sprite->setLayer(Sprite::BASE_LAYER_SPOT + id);
     sprite->setAlpha(alpha);
     sprite->setTransformationMatrix(SpriteTransformationMatrix(scale, 0.0f, 0.0f, scale));
     sprite->setPosition(x, y);
     sprite->setDisplayId(displayId);
     this->x = x;
     this->y = y;

     if (icon != mLastIcon) {
         mLastIcon = icon;
         if (icon) {
             sprite->setIcon(*icon);
             sprite->setVisible(true);
         } else {
             sprite->setVisible(false);
         }
     }
 }

 // --- TouchSpotController ---

 TouchSpotController::TouchSpotController(int32_t displayId, PointerControllerContext& context)
       : mDisplayId(displayId), mContext(context) {
     mContext.getPolicy()->loadPointerResources(&mResources, mDisplayId);
 }

 TouchSpotController::~TouchSpotController() {
     std::scoped_lock lock(mLock);

     size_t numSpots = mLocked.displaySpots.size();
     for (size_t i = 0; i < numSpots; i++) {
         delete mLocked.displaySpots[i];
     }
     mLocked.displaySpots.clear();
 }

 void TouchSpotController::setSpots(const PointerCoords* spotCoords, const uint32_t* spotIdToIndex,
                                    BitSet32 spotIdBits) {
 #if DEBUG_SPOT_UPDATES
     ALOGD("setSpots: idBits=%08x", spotIdBits.value);
     for (BitSet32 idBits(spotIdBits); !idBits.isEmpty();) {
         uint32_t id = idBits.firstMarkedBit();
         idBits.clearBit(id);
         const PointerCoords& c = spotCoords[spotIdToIndex[id]];
         ALOGD(" spot %d: position=(%0.3f, %0.3f), pressure=%0.3f, displayId=%" PRId32 ".", id,
               c.getAxisValue(AMOTION_EVENT_AXIS_X), c.getAxisValue(AMOTION_EVENT_AXIS_Y),
               c.getAxisValue(AMOTION_EVENT_AXIS_PRESSURE), displayId);
     }
 #endif

     std::scoped_lock lock(mLock);
     sp<SpriteController> spriteController = mContext.getSpriteController();
     spriteController->openTransaction();

     // Add or move spots for fingers that are down.
     for (BitSet32 idBits(spotIdBits); !idBits.isEmpty();) {
         uint32_t id = idBits.clearFirstMarkedBit();
         const PointerCoords& c = spotCoords[spotIdToIndex[id]];
         const SpriteIcon& icon = c.getAxisValue(AMOTION_EVENT_AXIS_PRESSURE) > 0
                 ? mResources.spotTouch
                 : mResources.spotHover;
         float x = c.getAxisValue(AMOTION_EVENT_AXIS_X);
         float y = c.getAxisValue(AMOTION_EVENT_AXIS_Y);

         Spot* spot = getSpot(id, mLocked.displaySpots);
         if (!spot) {
             spot = createAndAddSpotLocked(id, mLocked.displaySpots);
         }

         spot->updateSprite(&icon, x, y, mDisplayId);
     }

     for (Spot* spot : mLocked.displaySpots) {
         if (spot->id != Spot::INVALID_ID && !spotIdBits.hasBit(spot->id)) {
             fadeOutAndReleaseSpotLocked(spot);
         }
     }

     spriteController->closeTransaction();
 }

 void TouchSpotController::clearSpots() {
 #if DEBUG_SPOT_UPDATES
     ALOGD("clearSpots");
 #endif

     std::scoped_lock lock(mLock);
     fadeOutAndReleaseAllSpotsLocked();
 }

 TouchSpotController::Spot* TouchSpotController::getSpot(uint32_t id,
                                                         const std::vector<Spot*>& spots) {
     for (size_t i = 0; i < spots.size(); i++) {
         Spot* spot = spots[i];
         if (spot->id == id) {
             return spot;
         }
     }
     return nullptr;
 }

 TouchSpotController::Spot* TouchSpotController::createAndAddSpotLocked(uint32_t id,
                                                                        std::vector<Spot*>& spots)
         REQUIRES(mLock) {
     // Remove spots until we have fewer than MAX_SPOTS remaining.
     while (spots.size() >= MAX_SPOTS) {
         Spot* spot = removeFirstFadingSpotLocked(spots);
         if (!spot) {
             spot = spots[0];
             spots.erase(spots.begin());
         }
         releaseSpotLocked(spot);
     }

     // Obtain a sprite from the recycled pool.
     sp<Sprite> sprite;
     if (!mLocked.recycledSprites.empty()) {
         sprite = mLocked.recycledSprites.back();
         mLocked.recycledSprites.pop_back();
     } else {
         sprite = mContext.getSpriteController()->createSprite();
     }

     // Return the new spot.
     Spot* spot = new Spot(id, sprite);
     spots.push_back(spot);
     return spot;
 }

 TouchSpotController::Spot* TouchSpotController::removeFirstFadingSpotLocked(
         std::vector<Spot*>& spots) REQUIRES(mLock) {
     for (size_t i = 0; i < spots.size(); i++) {
         Spot* spot = spots[i];
         if (spot->id == Spot::INVALID_ID) {
             spots.erase(spots.begin() + i);
             return spot;
         }
     }
     return NULL;
 }

 void TouchSpotController::releaseSpotLocked(Spot* spot) REQUIRES(mLock) {
     spot->sprite->clearIcon();

     if (mLocked.recycledSprites.size() < MAX_RECYCLED_SPRITES) {
         mLocked.recycledSprites.push_back(spot->sprite);
     }
     delete spot;
 }

 void TouchSpotController::fadeOutAndReleaseSpotLocked(Spot* spot) REQUIRES(mLock) {
     if (spot->id != Spot::INVALID_ID) {
         spot->id = Spot::INVALID_ID;
         startAnimationLocked();
     }
 }

 void TouchSpotController::fadeOutAndReleaseAllSpotsLocked() REQUIRES(mLock) {
     size_t numSpots = mLocked.displaySpots.size();
     for (size_t i = 0; i < numSpots; i++) {
         Spot* spot = mLocked.displaySpots[i];
         fadeOutAndReleaseSpotLocked(spot);
     }
 }

 void TouchSpotController::reloadSpotResources() {
     mContext.getPolicy()->loadPointerResources(&mResources, mDisplayId);
 }

 bool TouchSpotController::doAnimations(nsecs_t timestamp) {
     std::scoped_lock lock(mLock);
     bool keepAnimating = doFadingAnimationLocked(timestamp);
     if (!keepAnimating) {
         /*
          * We know that this callback will be removed before another
          * is added. mLock in PointerAnimator will not be released
          * until after this is removed, and adding another callback
          * requires that lock. Thus it's safe to set mLocked.animating
          * here.
          */
         mLocked.animating = false;
     }
     return keepAnimating;
 }

 bool TouchSpotController::doFadingAnimationLocked(nsecs_t timestamp) REQUIRES(mLock) {
     bool keepAnimating = false;
     nsecs_t animationTime = mContext.getAnimationTime();
     nsecs_t frameDelay = timestamp - animationTime;
     size_t numSpots = mLocked.displaySpots.size();
     for (size_t i = 0; i < numSpots;) {
         Spot* spot = mLocked.displaySpots[i];
         if (spot->id == Spot::INVALID_ID) {
             spot->alpha -= float(frameDelay) / SPOT_FADE_DURATION;
             if (spot->alpha <= 0) {
                 mLocked.displaySpots.erase(mLocked.displaySpots.begin() + i);
                 releaseSpotLocked(spot);
                 numSpots--;
                 continue;
             } else {
                 spot->sprite->setAlpha(spot->alpha);
                 keepAnimating = true;
             }
         }
         ++i;
     }
     return keepAnimating;
 }

 void TouchSpotController::startAnimationLocked() REQUIRES(mLock) {
     using namespace std::placeholders;

     if (mLocked.animating) {
         return;
     }
     mLocked.animating = true;

     std::function<bool(nsecs_t)> func = std::bind(&TouchSpotController::doAnimations, this, _1);
     mContext.addAnimationCallback(mDisplayId, func);
 }

 } // namespace android
	/*
	* Copyright (C) 2020 The Android Open Source Project
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/

	#define LOG_TAG "TouchSpotController"

	// Log debug messages about pointer updates
	#define DEBUG_SPOT_UPDATES 0

	#include "TouchSpotController.h"

	#include <log/log.h>

	#include <SkBitmap.h>
	#include <SkBlendMode.h>
	#include <SkCanvas.h>
	#include <SkColor.h>
	#include <SkPaint.h>

	namespace {
	// Time to spend fading out the spot completely.
	const nsecs_t SPOT_FADE_DURATION = 200 * 1000000LL; // 200 ms
	} // namespace

	namespace android {

	// --- Spot ---

	void TouchSpotController::Spot::updateSprite(const SpriteIcon* icon, float x, float y,
	int32_t displayId) {
	sprite->setLayer(Sprite::BASE_LAYER_SPOT + id);
	sprite->setAlpha(alpha);
	sprite->setTransformationMatrix(SpriteTransformationMatrix(scale, 0.0f, 0.0f, scale));
	sprite->setPosition(x, y);
	sprite->setDisplayId(displayId);
	this->x = x;
	this->y = y;

	if (icon != mLastIcon) {
	mLastIcon = icon;
	if (icon) {
	sprite->setIcon(*icon);
	sprite->setVisible(true);
	} else {
	sprite->setVisible(false);
	}
	}
	}

	// --- TouchSpotController ---

	TouchSpotController::TouchSpotController(int32_t displayId, PointerControllerContext& context)
	: mDisplayId(displayId), mContext(context) {
	mContext.getPolicy()->loadPointerResources(&mResources, mDisplayId);
	}

	TouchSpotController::~TouchSpotController() {
	std::scoped_lock lock(mLock);

	size_t numSpots = mLocked.displaySpots.size();
	for (size_t i = 0; i < numSpots; i++) {
	delete mLocked.displaySpots[i];
	}
	mLocked.displaySpots.clear();
	}

	void TouchSpotController::setSpots(const PointerCoords* spotCoords, const uint32_t* spotIdToIndex,
	BitSet32 spotIdBits) {
	#if DEBUG_SPOT_UPDATES
	ALOGD("setSpots: idBits=%08x", spotIdBits.value);
	for (BitSet32 idBits(spotIdBits); !idBits.isEmpty();) {
	uint32_t id = idBits.firstMarkedBit();
	idBits.clearBit(id);
	const PointerCoords& c = spotCoords[spotIdToIndex[id]];
	ALOGD(" spot %d: position=(%0.3f, %0.3f), pressure=%0.3f, displayId=%" PRId32 ".", id,
	c.getAxisValue(AMOTION_EVENT_AXIS_X), c.getAxisValue(AMOTION_EVENT_AXIS_Y),
	c.getAxisValue(AMOTION_EVENT_AXIS_PRESSURE), displayId);
	}
	#endif

	std::scoped_lock lock(mLock);
	sp<SpriteController> spriteController = mContext.getSpriteController();
	spriteController->openTransaction();

	// Add or move spots for fingers that are down.
	for (BitSet32 idBits(spotIdBits); !idBits.isEmpty();) {
	uint32_t id = idBits.clearFirstMarkedBit();
	const PointerCoords& c = spotCoords[spotIdToIndex[id]];
	const SpriteIcon& icon = c.getAxisValue(AMOTION_EVENT_AXIS_PRESSURE) > 0
	? mResources.spotTouch
	: mResources.spotHover;
	float x = c.getAxisValue(AMOTION_EVENT_AXIS_X);
	float y = c.getAxisValue(AMOTION_EVENT_AXIS_Y);

	Spot* spot = getSpot(id, mLocked.displaySpots);
	if (!spot) {
	spot = createAndAddSpotLocked(id, mLocked.displaySpots);
	}

	spot->updateSprite(&icon, x, y, mDisplayId);
	}

	for (Spot* spot : mLocked.displaySpots) {
	if (spot->id != Spot::INVALID_ID && !spotIdBits.hasBit(spot->id)) {
	fadeOutAndReleaseSpotLocked(spot);
	}
	}

	spriteController->closeTransaction();
	}

	void TouchSpotController::clearSpots() {
	#if DEBUG_SPOT_UPDATES
	ALOGD("clearSpots");
	#endif

	std::scoped_lock lock(mLock);
	fadeOutAndReleaseAllSpotsLocked();
	}

	TouchSpotController::Spot* TouchSpotController::getSpot(uint32_t id,
	const std::vector<Spot*>& spots) {
	for (size_t i = 0; i < spots.size(); i++) {
	Spot* spot = spots[i];
	if (spot->id == id) {
	return spot;
	}
	}
	return nullptr;
	}

	TouchSpotController::Spot* TouchSpotController::createAndAddSpotLocked(uint32_t id,
	std::vector<Spot*>& spots)
	REQUIRES(mLock) {
	// Remove spots until we have fewer than MAX_SPOTS remaining.
	while (spots.size() >= MAX_SPOTS) {
	Spot* spot = removeFirstFadingSpotLocked(spots);
	if (!spot) {
	spot = spots[0];
	spots.erase(spots.begin());
	}
	releaseSpotLocked(spot);
	}

	// Obtain a sprite from the recycled pool.
	sp<Sprite> sprite;
	if (!mLocked.recycledSprites.empty()) {
	sprite = mLocked.recycledSprites.back();
	mLocked.recycledSprites.pop_back();
	} else {
	sprite = mContext.getSpriteController()->createSprite();
	}

	// Return the new spot.
	Spot* spot = new Spot(id, sprite);
	spots.push_back(spot);
	return spot;
	}

	TouchSpotController::Spot* TouchSpotController::removeFirstFadingSpotLocked(
	std::vector<Spot*>& spots) REQUIRES(mLock) {
	for (size_t i = 0; i < spots.size(); i++) {
	Spot* spot = spots[i];
	if (spot->id == Spot::INVALID_ID) {
	spots.erase(spots.begin() + i);
	return spot;
	}
	}
	return NULL;
	}

	void TouchSpotController::releaseSpotLocked(Spot* spot) REQUIRES(mLock) {
	spot->sprite->clearIcon();

	if (mLocked.recycledSprites.size() < MAX_RECYCLED_SPRITES) {
	mLocked.recycledSprites.push_back(spot->sprite);
	}
	delete spot;
	}

	void TouchSpotController::fadeOutAndReleaseSpotLocked(Spot* spot) REQUIRES(mLock) {
	if (spot->id != Spot::INVALID_ID) {
	spot->id = Spot::INVALID_ID;
	startAnimationLocked();
	}
	}

	void TouchSpotController::fadeOutAndReleaseAllSpotsLocked() REQUIRES(mLock) {
	size_t numSpots = mLocked.displaySpots.size();
	for (size_t i = 0; i < numSpots; i++) {
	Spot* spot = mLocked.displaySpots[i];
	fadeOutAndReleaseSpotLocked(spot);
	}
	}

	void TouchSpotController::reloadSpotResources() {
	mContext.getPolicy()->loadPointerResources(&mResources, mDisplayId);
	}

	bool TouchSpotController::doAnimations(nsecs_t timestamp) {
	std::scoped_lock lock(mLock);
	bool keepAnimating = doFadingAnimationLocked(timestamp);
	if (!keepAnimating) {
	/*
	* We know that this callback will be removed before another
	* is added. mLock in PointerAnimator will not be released
	* until after this is removed, and adding another callback
	* requires that lock. Thus it's safe to set mLocked.animating
	* here.
	*/
	mLocked.animating = false;
	}
	return keepAnimating;
	}

	bool TouchSpotController::doFadingAnimationLocked(nsecs_t timestamp) REQUIRES(mLock) {
	bool keepAnimating = false;
	nsecs_t animationTime = mContext.getAnimationTime();
	nsecs_t frameDelay = timestamp - animationTime;
	size_t numSpots = mLocked.displaySpots.size();
	for (size_t i = 0; i < numSpots;) {
	Spot* spot = mLocked.displaySpots[i];
	if (spot->id == Spot::INVALID_ID) {
	spot->alpha -= float(frameDelay) / SPOT_FADE_DURATION;
	if (spot->alpha <= 0) {
	mLocked.displaySpots.erase(mLocked.displaySpots.begin() + i);
	releaseSpotLocked(spot);
	numSpots--;
	continue;
	} else {
	spot->sprite->setAlpha(spot->alpha);
	keepAnimating = true;
	}
	}
	++i;
	}
	return keepAnimating;
	}

	void TouchSpotController::startAnimationLocked() REQUIRES(mLock) {
	using namespace std::placeholders;

	if (mLocked.animating) {
	return;
	}
	mLocked.animating = true;

	std::function<bool(nsecs_t)> func = std::bind(&TouchSpotController::doAnimations, this, _1);
	mContext.addAnimationCallback(mDisplayId, func);
	}

	} // namespace android