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Diffstat (limited to 'libs/input/TouchSpotController.cpp')
| -rw-r--r-- | libs/input/TouchSpotController.cpp | 264 |
1 files changed, 264 insertions, 0 deletions
diff --git a/libs/input/TouchSpotController.cpp b/libs/input/TouchSpotController.cpp new file mode 100644 index 000000000000..f7c685ff8ba6 --- /dev/null +++ b/libs/input/TouchSpotController.cpp @@ -0,0 +1,264 @@ +/* + * 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 |