Revert "Revert "Add ExternalTexture class into RenderEngine inte..."

Revert submission 14199598-revert-14086921-renderengine-external-tex-QJNBWQMQEU

Reason for revert: Prepare for relanding
Reverted Changes:
I01e65a7f4:Revert "Update WaylandRenderSurface to accomodate ...
I7d58118c1:Revert "Update Readback VTS to align with RenderEn...
I1501890f4:Revert "Add ExternalTexture class into RenderEngin...

Added the following fixes:
1. CachedSet renders to intermediate texture variable rather than
mTexture directly, since mTexture is not guaranteed to be nonnull.
2. Add null check when setting new buffer in BLAST.

Bug: 185524947
Bug: 180767535
Test: builds, boots
Test: librenderengine_test
Change-Id: I52ea82e24336b496d996bbe3e445db0affe1abb8
diff --git a/services/surfaceflinger/CompositionEngine/src/Output.cpp b/services/surfaceflinger/CompositionEngine/src/Output.cpp
index 3ac5433..3468b20 100644
--- a/services/surfaceflinger/CompositionEngine/src/Output.cpp
+++ b/services/surfaceflinger/CompositionEngine/src/Output.cpp
@@ -14,8 +14,7 @@
  * limitations under the License.
  */
 
-#include <thread>
-
+#include <SurfaceFlingerProperties.sysprop.h>
 #include <android-base/stringprintf.h>
 #include <compositionengine/CompositionEngine.h>
 #include <compositionengine/CompositionRefreshArgs.h>
@@ -29,7 +28,9 @@
 #include <compositionengine/impl/OutputLayerCompositionState.h>
 #include <compositionengine/impl/planner/Planner.h>
 
-#include <SurfaceFlingerProperties.sysprop.h>
+#include <thread>
+
+#include "renderengine/ExternalTexture.h"
 
 // TODO(b/129481165): remove the #pragma below and fix conversion issues
 #pragma clang diagnostic push
@@ -715,11 +716,11 @@
         bool skipLayer = false;
         if (layer->getState().overrideInfo.buffer != nullptr) {
             if (previousOverride != nullptr &&
-                layer->getState().overrideInfo.buffer == previousOverride) {
+                layer->getState().overrideInfo.buffer->getBuffer() == previousOverride) {
                 ALOGV("Skipping redundant buffer");
                 skipLayer = true;
             }
-            previousOverride = layer->getState().overrideInfo.buffer;
+            previousOverride = layer->getState().overrideInfo.buffer->getBuffer();
         }
 
         const bool includeGeometry = refreshArgs.updatingGeometryThisFrame;
@@ -978,14 +979,15 @@
     }
 
     base::unique_fd fd;
-    sp<GraphicBuffer> buf;
+
+    std::shared_ptr<renderengine::ExternalTexture> tex;
 
     // If we aren't doing client composition on this output, but do have a
     // flipClientTarget request for this frame on this output, we still need to
     // dequeue a buffer.
     if (hasClientComposition || outputState.flipClientTarget) {
-        buf = mRenderSurface->dequeueBuffer(&fd);
-        if (buf == nullptr) {
+        tex = mRenderSurface->dequeueBuffer(&fd);
+        if (tex == nullptr) {
             ALOGW("Dequeuing buffer for display [%s] failed, bailing out of "
                   "client composition for this frame",
                   mName.c_str());
@@ -1030,13 +1032,14 @@
     // Check if the client composition requests were rendered into the provided graphic buffer. If
     // so, we can reuse the buffer and avoid client composition.
     if (mClientCompositionRequestCache) {
-        if (mClientCompositionRequestCache->exists(buf->getId(), clientCompositionDisplay,
+        if (mClientCompositionRequestCache->exists(tex->getBuffer()->getId(),
+                                                   clientCompositionDisplay,
                                                    clientCompositionLayers)) {
             outputCompositionState.reusedClientComposition = true;
             setExpensiveRenderingExpected(false);
             return readyFence;
         }
-        mClientCompositionRequestCache->add(buf->getId(), clientCompositionDisplay,
+        mClientCompositionRequestCache->add(tex->getBuffer()->getId(), clientCompositionDisplay,
                                             clientCompositionLayers);
     }
 
@@ -1069,12 +1072,12 @@
     // over to RenderEngine, in which case this flag can be removed from the drawLayers interface.
     const bool useFramebufferCache = outputState.layerStackInternal;
     status_t status =
-            renderEngine.drawLayers(clientCompositionDisplay, clientCompositionLayerPointers, buf,
+            renderEngine.drawLayers(clientCompositionDisplay, clientCompositionLayerPointers, tex,
                                     useFramebufferCache, std::move(fd), &readyFence);
 
     if (status != NO_ERROR && mClientCompositionRequestCache) {
         // If rendering was not successful, remove the request from the cache.
-        mClientCompositionRequestCache->remove(buf->getId());
+        mClientCompositionRequestCache->remove(tex->getBuffer()->getId());
     }
 
     auto& timeStats = getCompositionEngine().getTimeStats();
@@ -1151,9 +1154,9 @@
 
             std::vector<LayerFE::LayerSettings> results;
             if (layer->getState().overrideInfo.buffer != nullptr) {
-                if (layer->getState().overrideInfo.buffer != previousOverrideBuffer) {
+                if (layer->getState().overrideInfo.buffer->getBuffer() != previousOverrideBuffer) {
                     results = layer->getOverrideCompositionList();
-                    previousOverrideBuffer = layer->getState().overrideInfo.buffer;
+                    previousOverrideBuffer = layer->getState().overrideInfo.buffer->getBuffer();
                     ALOGV("Replacing [%s] with override in RE", layer->getLayerFE().getDebugName());
                 } else {
                     ALOGV("Skipping redundant override buffer for [%s] in RE",
diff --git a/services/surfaceflinger/CompositionEngine/src/OutputLayer.cpp b/services/surfaceflinger/CompositionEngine/src/OutputLayer.cpp
index f640f85..9ca8914 100644
--- a/services/surfaceflinger/CompositionEngine/src/OutputLayer.cpp
+++ b/services/surfaceflinger/CompositionEngine/src/OutputLayer.cpp
@@ -537,7 +537,7 @@
     sp<GraphicBuffer> buffer = outputIndependentState.buffer;
     sp<Fence> acquireFence = outputIndependentState.acquireFence;
     if (getState().overrideInfo.buffer != nullptr) {
-        buffer = getState().overrideInfo.buffer;
+        buffer = getState().overrideInfo.buffer->getBuffer();
         acquireFence = getState().overrideInfo.acquireFence;
     }
 
@@ -699,7 +699,7 @@
     settings.geometry = renderengine::Geometry{
             .boundaries = boundaries.toFloatRect(),
     };
-    settings.bufferId = getState().overrideInfo.buffer->getId();
+    settings.bufferId = getState().overrideInfo.buffer->getBuffer()->getId();
     settings.source = renderengine::PixelSource{
             .buffer = renderengine::Buffer{
                     .buffer = getState().overrideInfo.buffer,
diff --git a/services/surfaceflinger/CompositionEngine/src/RenderSurface.cpp b/services/surfaceflinger/CompositionEngine/src/RenderSurface.cpp
index 3bef77d..ef50870 100644
--- a/services/surfaceflinger/CompositionEngine/src/RenderSurface.cpp
+++ b/services/surfaceflinger/CompositionEngine/src/RenderSurface.cpp
@@ -25,8 +25,8 @@
 #include <compositionengine/impl/DumpHelpers.h>
 #include <compositionengine/impl/OutputCompositionState.h>
 #include <compositionengine/impl/RenderSurface.h>
-
 #include <log/log.h>
+#include <renderengine/ExternalTexture.h>
 #include <renderengine/RenderEngine.h>
 #include <system/window.h>
 #include <ui/GraphicBuffer.h>
@@ -63,7 +63,8 @@
         mDisplay(display),
         mNativeWindow(args.nativeWindow),
         mDisplaySurface(args.displaySurface),
-        mSize(args.displayWidth, args.displayHeight) {
+        mSize(args.displayWidth, args.displayHeight),
+        mMaxTextureCacheSize(args.maxTextureCacheSize) {
     LOG_ALWAYS_FATAL_IF(!mNativeWindow);
 }
 
@@ -146,7 +147,8 @@
     }
 }
 
-sp<GraphicBuffer> RenderSurface::dequeueBuffer(base::unique_fd* bufferFence) {
+std::shared_ptr<renderengine::ExternalTexture> RenderSurface::dequeueBuffer(
+        base::unique_fd* bufferFence) {
     ATRACE_CALL();
     int fd = -1;
     ANativeWindowBuffer* buffer = nullptr;
@@ -158,16 +160,41 @@
               mDisplay.getName().c_str(), result);
         // Return fast here as we can't do much more - any rendering we do
         // now will just be wrong.
-        return mGraphicBuffer;
+        return mTexture;
     }
 
-    ALOGW_IF(mGraphicBuffer != nullptr, "Clobbering a non-null pointer to a buffer [%p].",
-             mGraphicBuffer->getNativeBuffer()->handle);
-    mGraphicBuffer = GraphicBuffer::from(buffer);
+    ALOGW_IF(mTexture != nullptr, "Clobbering a non-null pointer to a buffer [%p].",
+             mTexture->getBuffer()->getNativeBuffer()->handle);
+
+    sp<GraphicBuffer> newBuffer = GraphicBuffer::from(buffer);
+
+    std::shared_ptr<renderengine::ExternalTexture> texture;
+
+    for (auto it = mTextureCache.begin(); it != mTextureCache.end(); it++) {
+        const auto& cachedTexture = *it;
+        if (cachedTexture->getBuffer()->getId() == newBuffer->getId()) {
+            texture = cachedTexture;
+            mTextureCache.erase(it);
+            break;
+        }
+    }
+
+    if (texture) {
+        mTexture = texture;
+    } else {
+        mTexture = std::make_shared<
+                renderengine::ExternalTexture>(GraphicBuffer::from(buffer),
+                                               mCompositionEngine.getRenderEngine(),
+                                               renderengine::ExternalTexture::Usage::WRITEABLE);
+    }
+    mTextureCache.push_back(mTexture);
+    if (mTextureCache.size() > mMaxTextureCacheSize) {
+        mTextureCache.erase(mTextureCache.begin());
+    }
 
     *bufferFence = base::unique_fd(fd);
 
-    return mGraphicBuffer;
+    return mTexture;
 }
 
 void RenderSurface::queueBuffer(base::unique_fd readyFence) {
@@ -177,24 +204,24 @@
         // hasFlipClientTargetRequest could return true even if we haven't
         // dequeued a buffer before. Try dequeueing one if we don't have a
         // buffer ready.
-        if (mGraphicBuffer == nullptr) {
+        if (mTexture == nullptr) {
             ALOGI("Attempting to queue a client composited buffer without one "
                   "previously dequeued for display [%s]. Attempting to dequeue "
                   "a scratch buffer now",
                   mDisplay.getName().c_str());
-            // We shouldn't deadlock here, since mGraphicBuffer == nullptr only
+            // We shouldn't deadlock here, since mTexture == nullptr only
             // after a successful call to queueBuffer, or if dequeueBuffer has
             // never been called.
             base::unique_fd unused;
             dequeueBuffer(&unused);
         }
 
-        if (mGraphicBuffer == nullptr) {
+        if (mTexture == nullptr) {
             ALOGE("No buffer is ready for display [%s]", mDisplay.getName().c_str());
         } else {
-            status_t result =
-                    mNativeWindow->queueBuffer(mNativeWindow.get(),
-                                               mGraphicBuffer->getNativeBuffer(), dup(readyFence));
+            status_t result = mNativeWindow->queueBuffer(mNativeWindow.get(),
+                                                         mTexture->getBuffer()->getNativeBuffer(),
+                                                         dup(readyFence));
             if (result != NO_ERROR) {
                 ALOGE("Error when queueing buffer for display [%s]: %d", mDisplay.getName().c_str(),
                       result);
@@ -204,11 +231,12 @@
                     LOG_ALWAYS_FATAL("ANativeWindow::queueBuffer failed with error: %d", result);
                 } else {
                     mNativeWindow->cancelBuffer(mNativeWindow.get(),
-                                                mGraphicBuffer->getNativeBuffer(), dup(readyFence));
+                                                mTexture->getBuffer()->getNativeBuffer(),
+                                                dup(readyFence));
                 }
             }
 
-            mGraphicBuffer = nullptr;
+            mTexture = nullptr;
         }
     }
 
@@ -256,8 +284,8 @@
     mSize = size;
 }
 
-sp<GraphicBuffer>& RenderSurface::mutableGraphicBufferForTest() {
-    return mGraphicBuffer;
+std::shared_ptr<renderengine::ExternalTexture>& RenderSurface::mutableTextureForTest() {
+    return mTexture;
 }
 
 } // namespace impl
diff --git a/services/surfaceflinger/CompositionEngine/src/planner/CachedSet.cpp b/services/surfaceflinger/CompositionEngine/src/planner/CachedSet.cpp
index dcb7555..9955e29 100644
--- a/services/surfaceflinger/CompositionEngine/src/planner/CachedSet.cpp
+++ b/services/surfaceflinger/CompositionEngine/src/planner/CachedSet.cpp
@@ -130,7 +130,7 @@
 }
 
 bool CachedSet::hasReadyBuffer() const {
-    return mTexture.getBuffer() != nullptr && mDrawFence->getStatus() == Fence::Status::Signaled;
+    return mTexture != nullptr && mDrawFence->getStatus() == Fence::Status::Signaled;
 }
 
 std::vector<CachedSet> CachedSet::decompose() const {
@@ -217,21 +217,27 @@
     sp<GraphicBuffer> buffer = new GraphicBuffer(static_cast<uint32_t>(mBounds.getWidth()),
                                                  static_cast<uint32_t>(mBounds.getHeight()),
                                                  HAL_PIXEL_FORMAT_RGBA_8888, 1, usageFlags);
+    const auto texture = std::make_shared<
+            renderengine::ExternalTexture>(buffer, renderEngine,
+                                           renderengine::ExternalTexture::Usage::READABLE |
+                                                   renderengine::ExternalTexture::Usage::WRITEABLE);
     LOG_ALWAYS_FATAL_IF(buffer->initCheck() != OK);
     base::unique_fd drawFence;
 
-    status_t result = renderEngine.drawLayers(displaySettings, layerSettingsPointers, buffer, false,
-                                              base::unique_fd(), &drawFence);
+    status_t result = renderEngine.drawLayers(displaySettings, layerSettingsPointers, texture,
+                                              false, base::unique_fd(), &drawFence);
 
     if (result == NO_ERROR) {
-        mTexture.setBuffer(buffer, &renderEngine);
         mDrawFence = new Fence(drawFence.release());
         mOutputSpace = ProjectionSpace(ui::Size(outputState.framebufferSpace.bounds.getWidth(),
                                                 outputState.framebufferSpace.bounds.getHeight()),
                                        mBounds);
+        mTexture = std::move(texture);
         mOutputSpace.orientation = outputState.framebufferSpace.orientation;
         mOutputDataspace = outputDataspace;
         mOrientation = orientation;
+    } else {
+        mTexture = nullptr;
     }
 }
 
diff --git a/services/surfaceflinger/CompositionEngine/src/planner/Planner.cpp b/services/surfaceflinger/CompositionEngine/src/planner/Planner.cpp
index ad75557..3a2534b 100644
--- a/services/surfaceflinger/CompositionEngine/src/planner/Planner.cpp
+++ b/services/surfaceflinger/CompositionEngine/src/planner/Planner.cpp
@@ -111,7 +111,12 @@
     const GraphicBuffer* currentOverrideBuffer = nullptr;
     bool hasSkippedLayers = false;
     for (auto layer : layers) {
-        const GraphicBuffer* overrideBuffer = layer->getState().overrideInfo.buffer.get();
+        if (!layer->getState().overrideInfo.buffer) {
+            continue;
+        }
+
+        const GraphicBuffer* overrideBuffer =
+                layer->getState().overrideInfo.buffer->getBuffer().get();
         if (overrideBuffer != nullptr && overrideBuffer == currentOverrideBuffer) {
             // Skip this layer since it is part of a previous cached set
             hasSkippedLayers = true;