[SF] Extract {Display|Layer}RenderArea to separate files
This CL also fixes incorrect sampling bounds in RegionSamplingThread,
caused by ag/11837111.
Bug: 158599281
Test: atest libsurfaceflinger_unittest
Test: take a screenshot from launcher
Test: take a screenshot from YouTube while playing a video
Change-Id: I7e7777071e91a833a7bad4bd77e9d0c989fea9b7
diff --git a/services/surfaceflinger/LayerRenderArea.cpp b/services/surfaceflinger/LayerRenderArea.cpp
new file mode 100644
index 0000000..c4f8666
--- /dev/null
+++ b/services/surfaceflinger/LayerRenderArea.cpp
@@ -0,0 +1,113 @@
+/*
+ * Copyright 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.
+ */
+
+#include <ui/GraphicTypes.h>
+#include <ui/Transform.h>
+
+#include "ContainerLayer.h"
+#include "DisplayDevice.h"
+#include "Layer.h"
+#include "LayerRenderArea.h"
+#include "SurfaceFlinger.h"
+
+namespace android {
+namespace {
+
+struct ReparentForDrawing {
+ const sp<Layer>& oldParent;
+
+ ReparentForDrawing(const sp<Layer>& oldParent, const sp<Layer>& newParent,
+ const Rect& drawingBounds)
+ : oldParent(oldParent) {
+ // Compute and cache the bounds for the new parent layer.
+ newParent->computeBounds(drawingBounds.toFloatRect(), ui::Transform(),
+ 0.f /* shadowRadius */);
+ oldParent->setChildrenDrawingParent(newParent);
+ }
+ ~ReparentForDrawing() { oldParent->setChildrenDrawingParent(oldParent); }
+};
+
+} // namespace
+
+LayerRenderArea::LayerRenderArea(SurfaceFlinger& flinger, sp<Layer> layer, const Rect& crop,
+ ui::Size reqSize, ui::Dataspace reqDataSpace, bool childrenOnly,
+ const Rect& displayViewport)
+ : RenderArea(reqSize, CaptureFill::CLEAR, reqDataSpace, displayViewport),
+ mLayer(std::move(layer)),
+ mCrop(crop),
+ mFlinger(flinger),
+ mChildrenOnly(childrenOnly) {}
+
+const ui::Transform& LayerRenderArea::getTransform() const {
+ return mTransform;
+}
+
+Rect LayerRenderArea::getBounds() const {
+ return mLayer->getBufferSize(mLayer->getDrawingState());
+}
+
+int LayerRenderArea::getHeight() const {
+ return mLayer->getBufferSize(mLayer->getDrawingState()).getHeight();
+}
+
+int LayerRenderArea::getWidth() const {
+ return mLayer->getBufferSize(mLayer->getDrawingState()).getWidth();
+}
+
+bool LayerRenderArea::isSecure() const {
+ return false;
+}
+
+bool LayerRenderArea::needsFiltering() const {
+ return mNeedsFiltering;
+}
+
+sp<const DisplayDevice> LayerRenderArea::getDisplayDevice() const {
+ return nullptr;
+}
+
+Rect LayerRenderArea::getSourceCrop() const {
+ if (mCrop.isEmpty()) {
+ return getBounds();
+ } else {
+ return mCrop;
+ }
+}
+
+void LayerRenderArea::render(std::function<void()> drawLayers) {
+ using namespace std::string_literals;
+
+ const Rect sourceCrop = getSourceCrop();
+ // no need to check rotation because there is none
+ mNeedsFiltering = sourceCrop.width() != getReqWidth() || sourceCrop.height() != getReqHeight();
+
+ if (!mChildrenOnly) {
+ mTransform = mLayer->getTransform().inverse();
+ drawLayers();
+ } else {
+ uint32_t w = static_cast<uint32_t>(getWidth());
+ uint32_t h = static_cast<uint32_t>(getHeight());
+ // In the "childrenOnly" case we reparent the children to a screenshot
+ // layer which has no properties set and which does not draw.
+ sp<ContainerLayer> screenshotParentLayer = mFlinger.getFactory().createContainerLayer(
+ {&mFlinger, nullptr, "Screenshot Parent"s, w, h, 0, LayerMetadata()});
+
+ ReparentForDrawing reparent(mLayer, screenshotParentLayer, sourceCrop);
+ drawLayers();
+ }
+}
+
+} // namespace android