/* * Copyright (C) 2007 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 <stdlib.h> #include <stdint.h> #include <sys/types.h> #include <cutils/compiler.h> #include <cutils/native_handle.h> #include <cutils/properties.h> #include <utils/Errors.h> #include <utils/Log.h> #include <utils/StopWatch.h> #include <ui/GraphicBuffer.h> #include <ui/PixelFormat.h> #include <surfaceflinger/Surface.h> #include "clz.h" #include "DisplayHardware/DisplayHardware.h" #include "DisplayHardware/HWComposer.h" #include "GLExtensions.h" #include "Layer.h" #include "SurfaceFlinger.h" #include "SurfaceTextureLayer.h" #define DEBUG_RESIZE 0 namespace android { // --------------------------------------------------------------------------- Layer::Layer(SurfaceFlinger* flinger, DisplayID display, const sp<Client>& client) : LayerBaseClient(flinger, display, client), mTextureName(-1U), mQueuedFrames(0), mCurrentTransform(0), mCurrentScalingMode(NATIVE_WINDOW_SCALING_MODE_FREEZE), mCurrentOpacity(true), mFormat(PIXEL_FORMAT_NONE), mGLExtensions(GLExtensions::getInstance()), mOpaqueLayer(true), mNeedsDithering(false), mSecure(false), mProtectedByApp(false) { mCurrentCrop.makeInvalid(); glGenTextures(1, &mTextureName); } void Layer::destroy(RefBase const* base) { mFlinger->destroyLayer(static_cast<LayerBase const*>(base)); } void Layer::onFirstRef() { LayerBaseClient::onFirstRef(); setDestroyer(this); struct FrameQueuedListener : public SurfaceTexture::FrameAvailableListener { FrameQueuedListener(Layer* layer) : mLayer(layer) { } private: wp<Layer> mLayer; virtual void onFrameAvailable() { sp<Layer> that(mLayer.promote()); if (that != 0) { that->onFrameQueued(); } } }; mSurfaceTexture = new SurfaceTextureLayer(mTextureName, this); mSurfaceTexture->setFrameAvailableListener(new FrameQueuedListener(this)); mSurfaceTexture->setSynchronousMode(true); mSurfaceTexture->setBufferCountServer(2); } Layer::~Layer() { glDeleteTextures(1, &mTextureName); } void Layer::onFrameQueued() { android_atomic_inc(&mQueuedFrames); mFlinger->signalEvent(); } // called with SurfaceFlinger::mStateLock as soon as the layer is entered // in the purgatory list void Layer::onRemoved() { mSurfaceTexture->abandon(); } sp<ISurface> Layer::createSurface() { class BSurface : public BnSurface, public LayerCleaner { wp<const Layer> mOwner; virtual sp<ISurfaceTexture> getSurfaceTexture() const { sp<ISurfaceTexture> res; sp<const Layer> that( mOwner.promote() ); if (that != NULL) { res = that->mSurfaceTexture; } return res; } public: BSurface(const sp<SurfaceFlinger>& flinger, const sp<Layer>& layer) : LayerCleaner(flinger, layer), mOwner(layer) { } }; sp<ISurface> sur(new BSurface(mFlinger, this)); return sur; } status_t Layer::setBuffers( uint32_t w, uint32_t h, PixelFormat format, uint32_t flags) { // this surfaces pixel format PixelFormatInfo info; status_t err = getPixelFormatInfo(format, &info); if (err) return err; // the display's pixel format const DisplayHardware& hw(graphicPlane(0).displayHardware()); uint32_t const maxSurfaceDims = min( hw.getMaxTextureSize(), hw.getMaxViewportDims()); // never allow a surface larger than what our underlying GL implementation // can handle. if ((uint32_t(w)>maxSurfaceDims) || (uint32_t(h)>maxSurfaceDims)) { return BAD_VALUE; } PixelFormatInfo displayInfo; getPixelFormatInfo(hw.getFormat(), &displayInfo); const uint32_t hwFlags = hw.getFlags(); mFormat = format; mSecure = (flags & ISurfaceComposer::eSecure) ? true : false; mProtectedByApp = (flags & ISurfaceComposer::eProtectedByApp) ? true : false; mOpaqueLayer = (flags & ISurfaceComposer::eOpaque); mCurrentOpacity = getOpacityForFormat(format); mSurfaceTexture->setDefaultBufferSize(w, h); mSurfaceTexture->setDefaultBufferFormat(format); // we use the red index int displayRedSize = displayInfo.getSize(PixelFormatInfo::INDEX_RED); int layerRedsize = info.getSize(PixelFormatInfo::INDEX_RED); mNeedsDithering = layerRedsize > displayRedSize; return NO_ERROR; } void Layer::setGeometry(hwc_layer_t* hwcl) { LayerBaseClient::setGeometry(hwcl); hwcl->flags &= ~HWC_SKIP_LAYER; // we can't do alpha-fade with the hwc HAL const State& s(drawingState()); if (s.alpha < 0xFF) { hwcl->flags = HWC_SKIP_LAYER; } /* * 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 Transform bufferOrientation(mCurrentTransform); const Transform& stateTransform(s.transform); const Transform layerOrientation(mOrientation); const Transform tr(layerOrientation * stateTransform * bufferOrientation); // this gives us only the "orientation" component of the transform const uint32_t finalTransform = tr.getOrientation(); // we can only handle simple transformation if (finalTransform & Transform::ROT_INVALID) { hwcl->flags = HWC_SKIP_LAYER; } else { hwcl->transform = finalTransform; } } void Layer::setPerFrameData(hwc_layer_t* hwcl) { const sp<GraphicBuffer>& buffer(mActiveBuffer); if (buffer == NULL) { // this can happen if the client never drew into this layer yet, // or if we ran out of memory. In that case, don't let // HWC handle it. hwcl->flags |= HWC_SKIP_LAYER; hwcl->handle = NULL; } else { hwcl->handle = buffer->handle; } if (isCropped()) { hwcl->sourceCrop.left = mCurrentCrop.left; hwcl->sourceCrop.top = mCurrentCrop.top; hwcl->sourceCrop.right = mCurrentCrop.right; hwcl->sourceCrop.bottom = mCurrentCrop.bottom; } else { hwcl->sourceCrop.left = 0; hwcl->sourceCrop.top = 0; if (buffer != NULL) { hwcl->sourceCrop.right = buffer->width; hwcl->sourceCrop.bottom = buffer->height; } else { hwcl->sourceCrop.right = mTransformedBounds.width(); hwcl->sourceCrop.bottom = mTransformedBounds.height(); } } } static inline uint16_t pack565(int r, int g, int b) { return (r<<11)|(g<<5)|b; } void Layer::onDraw(const Region& clip) const { if (CC_UNLIKELY(mActiveBuffer == 0)) { // the texture has not been created yet, this Layer has // in fact never been drawn into. This happens frequently with // SurfaceView because the WindowManager can't know when the client // has drawn the first time. // If there is nothing under us, we paint the screen in black, otherwise // we just skip this update. // figure out if there is something below us Region under; const SurfaceFlinger::LayerVector& drawingLayers(mFlinger->mDrawingState.layersSortedByZ); const size_t count = drawingLayers.size(); for (size_t i=0 ; i<count ; ++i) { const sp<LayerBase>& layer(drawingLayers[i]); if (layer.get() == static_cast<LayerBase const*>(this)) break; under.orSelf(layer->visibleRegionScreen); } // if not everything below us is covered, we plug the holes! Region holes(clip.subtract(under)); if (!holes.isEmpty()) { clearWithOpenGL(holes, 0, 0, 0, 1); } return; } GLenum target = mSurfaceTexture->getCurrentTextureTarget(); glBindTexture(target, mTextureName); if (getFiltering() || needsFiltering() || isFixedSize() || isCropped()) { // TODO: we could be more subtle with isFixedSize() glTexParameterx(target, GL_TEXTURE_MAG_FILTER, GL_LINEAR); glTexParameterx(target, GL_TEXTURE_MIN_FILTER, GL_LINEAR); } else { glTexParameterx(target, GL_TEXTURE_MAG_FILTER, GL_NEAREST); glTexParameterx(target, GL_TEXTURE_MIN_FILTER, GL_NEAREST); } glEnable(target); glMatrixMode(GL_TEXTURE); glLoadMatrixf(mTextureMatrix); glMatrixMode(GL_MODELVIEW); drawWithOpenGL(clip); glDisable(target); } // As documented in libhardware header, formats in the range // 0x100 - 0x1FF are specific to the HAL implementation, and // are known to have no alpha channel // TODO: move definition for device-specific range into // hardware.h, instead of using hard-coded values here. #define HARDWARE_IS_DEVICE_FORMAT(f) ((f) >= 0x100 && (f) <= 0x1FF) bool Layer::getOpacityForFormat(uint32_t format) { if (HARDWARE_IS_DEVICE_FORMAT(format)) { return true; } PixelFormatInfo info; status_t err = getPixelFormatInfo(PixelFormat(format), &info); // in case of error (unknown format), we assume no blending return (err || info.h_alpha <= info.l_alpha); } bool Layer::isOpaque() const { // if we don't have a buffer yet, we're translucent regardless of the // layer's opaque flag. if (mActiveBuffer == 0) { return false; } // if the layer has the opaque flag, then we're always opaque, // otherwise we use the current buffer's format. return mOpaqueLayer || mCurrentOpacity; } bool Layer::isProtected() const { const sp<GraphicBuffer>& activeBuffer(mActiveBuffer); return (activeBuffer != 0) && (activeBuffer->getUsage() & GRALLOC_USAGE_PROTECTED); } uint32_t Layer::doTransaction(uint32_t flags) { const Layer::State& front(drawingState()); const Layer::State& temp(currentState()); const bool sizeChanged = (front.requested_w != temp.requested_w) || (front.requested_h != temp.requested_h); if (sizeChanged) { // the size changed, we need to ask our client to request a new buffer LOGD_IF(DEBUG_RESIZE, "doTransaction: " "resize (layer=%p), requested (%dx%d), drawing (%d,%d), " "scalingMode=%d", this, int(temp.requested_w), int(temp.requested_h), int(front.requested_w), int(front.requested_h), mCurrentScalingMode); if (!isFixedSize()) { // we're being resized and there is a freeze display request, // acquire a freeze lock, so that the screen stays put // until we've redrawn at the new size; this is to avoid // glitches upon orientation changes. if (mFlinger->hasFreezeRequest()) { // if the surface is hidden, don't try to acquire the // freeze lock, since hidden surfaces may never redraw if (!(front.flags & ISurfaceComposer::eLayerHidden)) { mFreezeLock = mFlinger->getFreezeLock(); } } // this will make sure LayerBase::doTransaction doesn't update // the drawing state's size Layer::State& editDraw(mDrawingState); editDraw.requested_w = temp.requested_w; editDraw.requested_h = temp.requested_h; // record the new size, form this point on, when the client request // a buffer, it'll get the new size. mSurfaceTexture->setDefaultBufferSize(temp.requested_w, temp.requested_h); } } if (temp.sequence != front.sequence) { if (temp.flags & ISurfaceComposer::eLayerHidden || temp.alpha == 0) { // this surface is now hidden, so it shouldn't hold a freeze lock // (it may never redraw, which is fine if it is hidden) mFreezeLock.clear(); } } return LayerBase::doTransaction(flags); } bool Layer::isFixedSize() const { return mCurrentScalingMode != NATIVE_WINDOW_SCALING_MODE_FREEZE; } bool Layer::isCropped() const { return !mCurrentCrop.isEmpty(); } // ---------------------------------------------------------------------------- // pageflip handling... // ---------------------------------------------------------------------------- void Layer::lockPageFlip(bool& recomputeVisibleRegions) { if (mQueuedFrames > 0) { const bool oldOpacity = isOpaque(); // signal another event if we have more frames pending if (android_atomic_dec(&mQueuedFrames) > 1) { mFlinger->signalEvent(); } if (mSurfaceTexture->updateTexImage() < NO_ERROR) { // something happened! recomputeVisibleRegions = true; return; } mActiveBuffer = mSurfaceTexture->getCurrentBuffer(); mSurfaceTexture->getTransformMatrix(mTextureMatrix); const Rect crop(mSurfaceTexture->getCurrentCrop()); const uint32_t transform(mSurfaceTexture->getCurrentTransform()); const uint32_t scalingMode(mSurfaceTexture->getCurrentScalingMode()); if ((crop != mCurrentCrop) || (transform != mCurrentTransform) || (scalingMode != mCurrentScalingMode)) { mCurrentCrop = crop; mCurrentTransform = transform; mCurrentScalingMode = scalingMode; mFlinger->invalidateHwcGeometry(); } mCurrentOpacity = getOpacityForFormat(mActiveBuffer->format); if (oldOpacity != isOpaque()) { recomputeVisibleRegions = true; } const GLenum target(mSurfaceTexture->getCurrentTextureTarget()); glTexParameterx(target, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); glTexParameterx(target, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); // update the layer size and release freeze-lock const Layer::State& front(drawingState()); // FIXME: mPostedDirtyRegion = dirty & bounds mPostedDirtyRegion.set(front.w, front.h); if ((front.w != front.requested_w) || (front.h != front.requested_h)) { // check that we received a buffer of the right size // (Take the buffer's orientation into account) sp<GraphicBuffer> newFrontBuffer(mActiveBuffer); uint32_t bufWidth = newFrontBuffer->getWidth(); uint32_t bufHeight = newFrontBuffer->getHeight(); if (mCurrentTransform & Transform::ROT_90) { swap(bufWidth, bufHeight); } if (isFixedSize() || (bufWidth == front.requested_w && bufHeight == front.requested_h)) { // Here we pretend the transaction happened by updating the // current and drawing states. Drawing state is only accessed // in this thread, no need to have it locked Layer::State& editDraw(mDrawingState); editDraw.w = editDraw.requested_w; editDraw.h = editDraw.requested_h; // We also need to update the current state so that we don't // end-up doing too much work during the next transaction. // NOTE: We actually don't need hold the transaction lock here // because State::w and State::h are only accessed from // this thread Layer::State& editTemp(currentState()); editTemp.w = editDraw.w; editTemp.h = editDraw.h; // recompute visible region recomputeVisibleRegions = true; // we now have the correct size, unfreeze the screen mFreezeLock.clear(); } LOGD_IF(DEBUG_RESIZE, "lockPageFlip : " " (layer=%p), buffer (%ux%u, tr=%02x), " "requested (%dx%d)", this, bufWidth, bufHeight, mCurrentTransform, front.requested_w, front.requested_h); } } } void Layer::unlockPageFlip( const Transform& planeTransform, Region& outDirtyRegion) { Region dirtyRegion(mPostedDirtyRegion); if (!dirtyRegion.isEmpty()) { mPostedDirtyRegion.clear(); // The dirty region is given in the layer's coordinate space // transform the dirty region by the surface's transformation // and the global transformation. const Layer::State& s(drawingState()); const Transform tr(planeTransform * s.transform); dirtyRegion = tr.transform(dirtyRegion); // At this point, the dirty region is in screen space. // Make sure it's constrained by the visible region (which // is in screen space as well). dirtyRegion.andSelf(visibleRegionScreen); outDirtyRegion.orSelf(dirtyRegion); } if (visibleRegionScreen.isEmpty()) { // an invisible layer should not hold a freeze-lock // (because it may never be updated and therefore never release it) mFreezeLock.clear(); } } void Layer::dump(String8& result, char* buffer, size_t SIZE) const { LayerBaseClient::dump(result, buffer, SIZE); sp<const GraphicBuffer> buf0(mActiveBuffer); uint32_t w0=0, h0=0, s0=0, f0=0; if (buf0 != 0) { w0 = buf0->getWidth(); h0 = buf0->getHeight(); s0 = buf0->getStride(); f0 = buf0->format; } snprintf(buffer, SIZE, " " "format=%2d, activeBuffer=[%3ux%3u:%3u,%3u]," " freezeLock=%p, queued-frames=%d\n", mFormat, w0, h0, s0,f0, getFreezeLock().get(), mQueuedFrames); result.append(buffer); if (mSurfaceTexture != 0) { mSurfaceTexture->dump(result, " ", buffer, SIZE); } } uint32_t Layer::getEffectiveUsage(uint32_t usage) const { // TODO: should we do something special if mSecure is set? if (mProtectedByApp) { // need a hardware-protected path to external video sink usage |= GraphicBuffer::USAGE_PROTECTED; } return usage; } // --------------------------------------------------------------------------- }; // namespace android