| /* |
| * 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 |
