| /* |
| * Copyright 2019 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. |
| */ |
| |
| #include <android-base/stringprintf.h> |
| #include <compositionengine/CompositionEngine.h> |
| #include <compositionengine/Layer.h> |
| #include <compositionengine/LayerFE.h> |
| #include <compositionengine/Output.h> |
| #include <compositionengine/impl/LayerCompositionState.h> |
| #include <compositionengine/impl/OutputCompositionState.h> |
| #include <compositionengine/impl/OutputLayer.h> |
| #include <compositionengine/impl/OutputLayerCompositionState.h> |
| |
| #include "DisplayHardware/HWComposer.h" |
| |
| namespace android::compositionengine { |
| |
| OutputLayer::~OutputLayer() = default; |
| |
| namespace impl { |
| |
| namespace { |
| |
| FloatRect reduce(const FloatRect& win, const Region& exclude) { |
| if (CC_LIKELY(exclude.isEmpty())) { |
| return win; |
| } |
| // Convert through Rect (by rounding) for lack of FloatRegion |
| return Region(Rect{win}).subtract(exclude).getBounds().toFloatRect(); |
| } |
| |
| } // namespace |
| |
| std::unique_ptr<compositionengine::OutputLayer> createOutputLayer( |
| const CompositionEngine& compositionEngine, std::optional<DisplayId> displayId, |
| const compositionengine::Output& output, std::shared_ptr<compositionengine::Layer> layer, |
| sp<compositionengine::LayerFE> layerFE) { |
| auto result = std::make_unique<OutputLayer>(output, layer, layerFE); |
| result->initialize(compositionEngine, displayId); |
| return result; |
| } |
| |
| OutputLayer::OutputLayer(const Output& output, std::shared_ptr<Layer> layer, sp<LayerFE> layerFE) |
| : mOutput(output), mLayer(layer), mLayerFE(layerFE) {} |
| |
| OutputLayer::~OutputLayer() = default; |
| |
| void OutputLayer::initialize(const CompositionEngine& compositionEngine, |
| std::optional<DisplayId> displayId) { |
| if (!displayId) { |
| return; |
| } |
| |
| auto& hwc = compositionEngine.getHwComposer(); |
| |
| mState.hwc.emplace(std::shared_ptr<HWC2::Layer>(hwc.createLayer(*displayId), |
| [&hwc, displayId](HWC2::Layer* layer) { |
| hwc.destroyLayer(*displayId, layer); |
| })); |
| } |
| |
| const compositionengine::Output& OutputLayer::getOutput() const { |
| return mOutput; |
| } |
| |
| compositionengine::Layer& OutputLayer::getLayer() const { |
| return *mLayer; |
| } |
| |
| compositionengine::LayerFE& OutputLayer::getLayerFE() const { |
| return *mLayerFE; |
| } |
| |
| const OutputLayerCompositionState& OutputLayer::getState() const { |
| return mState; |
| } |
| |
| OutputLayerCompositionState& OutputLayer::editState() { |
| return mState; |
| } |
| |
| Rect OutputLayer::calculateInitialCrop() const { |
| const auto& layerState = mLayer->getState().frontEnd; |
| |
| // apply the projection's clipping to the window crop in |
| // layerstack space, and convert-back to layer space. |
| // if there are no window scaling involved, this operation will map to full |
| // pixels in the buffer. |
| |
| FloatRect activeCropFloat = |
| reduce(layerState.geomLayerBounds, layerState.geomActiveTransparentRegion); |
| |
| const Rect& viewport = mOutput.getState().viewport; |
| const ui::Transform& layerTransform = layerState.geomLayerTransform; |
| const ui::Transform& inverseLayerTransform = layerState.geomInverseLayerTransform; |
| // Transform to screen space. |
| activeCropFloat = layerTransform.transform(activeCropFloat); |
| activeCropFloat = activeCropFloat.intersect(viewport.toFloatRect()); |
| // Back to layer space to work with the content crop. |
| activeCropFloat = inverseLayerTransform.transform(activeCropFloat); |
| |
| // This needs to be here as transform.transform(Rect) computes the |
| // transformed rect and then takes the bounding box of the result before |
| // returning. This means |
| // transform.inverse().transform(transform.transform(Rect)) != Rect |
| // in which case we need to make sure the final rect is clipped to the |
| // display bounds. |
| Rect activeCrop{activeCropFloat}; |
| if (!activeCrop.intersect(layerState.geomBufferSize, &activeCrop)) { |
| activeCrop.clear(); |
| } |
| return activeCrop; |
| } |
| |
| FloatRect OutputLayer::calculateOutputSourceCrop() const { |
| const auto& layerState = mLayer->getState().frontEnd; |
| const auto& outputState = mOutput.getState(); |
| |
| if (!layerState.geomUsesSourceCrop) { |
| return {}; |
| } |
| |
| // the content crop is the area of the content that gets scaled to the |
| // layer's size. This is in buffer space. |
| FloatRect crop = layerState.geomContentCrop.toFloatRect(); |
| |
| // In addition there is a WM-specified crop we pull from our drawing state. |
| Rect activeCrop = calculateInitialCrop(); |
| const Rect& bufferSize = layerState.geomBufferSize; |
| |
| int winWidth = bufferSize.getWidth(); |
| int winHeight = bufferSize.getHeight(); |
| |
| // The bufferSize for buffer state layers can be unbounded ([0, 0, -1, -1]) |
| // if display frame hasn't been set and the parent is an unbounded layer. |
| if (winWidth < 0 && winHeight < 0) { |
| return crop; |
| } |
| |
| // Transform the window crop to match the buffer coordinate system, |
| // which means using the inverse of the current transform set on the |
| // SurfaceFlingerConsumer. |
| uint32_t invTransform = layerState.geomBufferTransform; |
| if (layerState.geomBufferUsesDisplayInverseTransform) { |
| /* |
| * the code below applies the primary display's inverse transform to the |
| * buffer |
| */ |
| uint32_t invTransformOrient = outputState.orientation; |
| // calculate the inverse transform |
| if (invTransformOrient & HAL_TRANSFORM_ROT_90) { |
| invTransformOrient ^= HAL_TRANSFORM_FLIP_V | HAL_TRANSFORM_FLIP_H; |
| } |
| // and apply to the current transform |
| invTransform = |
| (ui::Transform(invTransformOrient) * ui::Transform(invTransform)).getOrientation(); |
| } |
| |
| if (invTransform & HAL_TRANSFORM_ROT_90) { |
| // If the activeCrop has been rotate the ends are rotated but not |
| // the space itself so when transforming ends back we can't rely on |
| // a modification of the axes of rotation. To account for this we |
| // need to reorient the inverse rotation in terms of the current |
| // axes of rotation. |
| bool is_h_flipped = (invTransform & HAL_TRANSFORM_FLIP_H) != 0; |
| bool is_v_flipped = (invTransform & HAL_TRANSFORM_FLIP_V) != 0; |
| if (is_h_flipped == is_v_flipped) { |
| invTransform ^= HAL_TRANSFORM_FLIP_V | HAL_TRANSFORM_FLIP_H; |
| } |
| std::swap(winWidth, winHeight); |
| } |
| const Rect winCrop = |
| activeCrop.transform(invTransform, bufferSize.getWidth(), bufferSize.getHeight()); |
| |
| // below, crop is intersected with winCrop expressed in crop's coordinate space |
| float xScale = crop.getWidth() / float(winWidth); |
| float yScale = crop.getHeight() / float(winHeight); |
| |
| float insetL = winCrop.left * xScale; |
| float insetT = winCrop.top * yScale; |
| float insetR = (winWidth - winCrop.right) * xScale; |
| float insetB = (winHeight - winCrop.bottom) * yScale; |
| |
| crop.left += insetL; |
| crop.top += insetT; |
| crop.right -= insetR; |
| crop.bottom -= insetB; |
| |
| return crop; |
| } |
| |
| Rect OutputLayer::calculateOutputDisplayFrame() const { |
| const auto& layerState = mLayer->getState().frontEnd; |
| const auto& outputState = mOutput.getState(); |
| |
| // apply the layer's transform, followed by the display's global transform |
| // here we're guaranteed that the layer's transform preserves rects |
| Region activeTransparentRegion = layerState.geomActiveTransparentRegion; |
| const ui::Transform& layerTransform = layerState.geomLayerTransform; |
| const ui::Transform& inverseLayerTransform = layerState.geomInverseLayerTransform; |
| const Rect& bufferSize = layerState.geomBufferSize; |
| Rect activeCrop = layerState.geomCrop; |
| if (!activeCrop.isEmpty() && bufferSize.isValid()) { |
| activeCrop = layerTransform.transform(activeCrop); |
| if (!activeCrop.intersect(outputState.viewport, &activeCrop)) { |
| activeCrop.clear(); |
| } |
| activeCrop = inverseLayerTransform.transform(activeCrop, true); |
| // This needs to be here as transform.transform(Rect) computes the |
| // transformed rect and then takes the bounding box of the result before |
| // returning. This means |
| // transform.inverse().transform(transform.transform(Rect)) != Rect |
| // in which case we need to make sure the final rect is clipped to the |
| // display bounds. |
| if (!activeCrop.intersect(bufferSize, &activeCrop)) { |
| activeCrop.clear(); |
| } |
| // mark regions outside the crop as transparent |
| activeTransparentRegion.orSelf(Rect(0, 0, bufferSize.getWidth(), activeCrop.top)); |
| activeTransparentRegion.orSelf( |
| Rect(0, activeCrop.bottom, bufferSize.getWidth(), bufferSize.getHeight())); |
| activeTransparentRegion.orSelf(Rect(0, activeCrop.top, activeCrop.left, activeCrop.bottom)); |
| activeTransparentRegion.orSelf( |
| Rect(activeCrop.right, activeCrop.top, bufferSize.getWidth(), activeCrop.bottom)); |
| } |
| |
| // reduce uses a FloatRect to provide more accuracy during the |
| // transformation. We then round upon constructing 'frame'. |
| Rect frame{ |
| layerTransform.transform(reduce(layerState.geomLayerBounds, activeTransparentRegion))}; |
| if (!frame.intersect(outputState.viewport, &frame)) { |
| frame.clear(); |
| } |
| const ui::Transform displayTransform{outputState.transform}; |
| |
| return displayTransform.transform(frame); |
| } |
| |
| uint32_t OutputLayer::calculateOutputRelativeBufferTransform() const { |
| const auto& layerState = mLayer->getState().frontEnd; |
| const auto& outputState = mOutput.getState(); |
| |
| /* |
| * Transformations are applied in this order: |
| * 1) buffer orientation/flip/mirror |
| * 2) state transformation (window manager) |
| * 3) layer orientation (screen orientation) |
| * (NOTE: the matrices are multiplied in reverse order) |
| */ |
| const ui::Transform& layerTransform = layerState.geomLayerTransform; |
| const ui::Transform displayTransform{outputState.orientation}; |
| const ui::Transform bufferTransform{layerState.geomBufferTransform}; |
| ui::Transform transform(displayTransform * layerTransform * bufferTransform); |
| |
| if (layerState.geomBufferUsesDisplayInverseTransform) { |
| /* |
| * the code below applies the primary display's inverse transform to the |
| * buffer |
| */ |
| uint32_t invTransform = outputState.orientation; |
| // calculate the inverse transform |
| if (invTransform & HAL_TRANSFORM_ROT_90) { |
| invTransform ^= HAL_TRANSFORM_FLIP_V | HAL_TRANSFORM_FLIP_H; |
| } |
| |
| /* |
| * Here we cancel out the orientation component of the WM transform. |
| * The scaling and translate components are already included in our bounds |
| * computation so it's enough to just omit it in the composition. |
| * See comment in BufferLayer::prepareClientLayer with ref to b/36727915 for why. |
| */ |
| transform = ui::Transform(invTransform) * displayTransform * bufferTransform; |
| } |
| |
| // this gives us only the "orientation" component of the transform |
| return transform.getOrientation(); |
| } // namespace impl |
| |
| void OutputLayer::updateCompositionState(bool includeGeometry) { |
| if (includeGeometry) { |
| mState.displayFrame = calculateOutputDisplayFrame(); |
| mState.sourceCrop = calculateOutputSourceCrop(); |
| mState.bufferTransform = |
| static_cast<Hwc2::Transform>(calculateOutputRelativeBufferTransform()); |
| |
| if ((mLayer->getState().frontEnd.isSecure && !mOutput.getState().isSecure) || |
| (mState.bufferTransform & ui::Transform::ROT_INVALID)) { |
| mState.forceClientComposition = true; |
| } |
| } |
| } |
| |
| void OutputLayer::writeStateToHWC(bool includeGeometry) const { |
| // Skip doing this if there is no HWC interface |
| if (!mState.hwc) { |
| return; |
| } |
| |
| auto& hwcLayer = (*mState.hwc).hwcLayer; |
| if (!hwcLayer) { |
| ALOGE("[%s] failed to write composition state to HWC -- no hwcLayer for output %s", |
| mLayerFE->getDebugName(), mOutput.getName().c_str()); |
| return; |
| } |
| |
| if (includeGeometry) { |
| // Output dependent state |
| |
| if (auto error = hwcLayer->setDisplayFrame(mState.displayFrame); |
| error != HWC2::Error::None) { |
| ALOGE("[%s] Failed to set display frame [%d, %d, %d, %d]: %s (%d)", |
| mLayerFE->getDebugName(), mState.displayFrame.left, mState.displayFrame.top, |
| mState.displayFrame.right, mState.displayFrame.bottom, to_string(error).c_str(), |
| static_cast<int32_t>(error)); |
| } |
| |
| if (auto error = hwcLayer->setSourceCrop(mState.sourceCrop); error != HWC2::Error::None) { |
| ALOGE("[%s] Failed to set source crop [%.3f, %.3f, %.3f, %.3f]: " |
| "%s (%d)", |
| mLayerFE->getDebugName(), mState.sourceCrop.left, mState.sourceCrop.top, |
| mState.sourceCrop.right, mState.sourceCrop.bottom, to_string(error).c_str(), |
| static_cast<int32_t>(error)); |
| } |
| |
| if (auto error = hwcLayer->setZOrder(mState.z); error != HWC2::Error::None) { |
| ALOGE("[%s] Failed to set Z %u: %s (%d)", mLayerFE->getDebugName(), mState.z, |
| to_string(error).c_str(), static_cast<int32_t>(error)); |
| } |
| |
| if (auto error = |
| hwcLayer->setTransform(static_cast<HWC2::Transform>(mState.bufferTransform)); |
| error != HWC2::Error::None) { |
| ALOGE("[%s] Failed to set transform %s: %s (%d)", mLayerFE->getDebugName(), |
| toString(mState.bufferTransform).c_str(), to_string(error).c_str(), |
| static_cast<int32_t>(error)); |
| } |
| |
| // Output independent state |
| |
| const auto& outputIndependentState = mLayer->getState().frontEnd; |
| |
| if (auto error = hwcLayer->setBlendMode( |
| static_cast<HWC2::BlendMode>(outputIndependentState.blendMode)); |
| error != HWC2::Error::None) { |
| ALOGE("[%s] Failed to set blend mode %s: %s (%d)", mLayerFE->getDebugName(), |
| toString(outputIndependentState.blendMode).c_str(), to_string(error).c_str(), |
| static_cast<int32_t>(error)); |
| } |
| |
| if (auto error = hwcLayer->setPlaneAlpha(outputIndependentState.alpha); |
| error != HWC2::Error::None) { |
| ALOGE("[%s] Failed to set plane alpha %.3f: %s (%d)", mLayerFE->getDebugName(), |
| outputIndependentState.alpha, to_string(error).c_str(), |
| static_cast<int32_t>(error)); |
| } |
| |
| if (auto error = |
| hwcLayer->setInfo(outputIndependentState.type, outputIndependentState.appId); |
| error != HWC2::Error::None) { |
| ALOGE("[%s] Failed to set info %s (%d)", mLayerFE->getDebugName(), |
| to_string(error).c_str(), static_cast<int32_t>(error)); |
| } |
| } |
| } |
| |
| void OutputLayer::dump(std::string& out) const { |
| using android::base::StringAppendF; |
| |
| StringAppendF(&out, " - Output Layer %p (Composition layer %p) (%s)\n", this, mLayer.get(), |
| mLayerFE->getDebugName()); |
| mState.dump(out); |
| } |
| |
| } // namespace impl |
| } // namespace android::compositionengine |