[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/DisplayRenderArea.cpp b/services/surfaceflinger/DisplayRenderArea.cpp
new file mode 100644
index 0000000..7cd283d
--- /dev/null
+++ b/services/surfaceflinger/DisplayRenderArea.cpp
@@ -0,0 +1,154 @@
+/*
+ * 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 "DisplayRenderArea.h"
+#include "DisplayDevice.h"
+
+namespace android {
+namespace {
+
+RenderArea::RotationFlags applyDeviceOrientation(RenderArea::RotationFlags rotation,
+ const DisplayDevice& display) {
+ uint32_t inverseRotate90 = 0;
+ uint32_t inverseReflect = 0;
+
+ // Reverse the logical orientation.
+ ui::Rotation logicalOrientation = display.getOrientation();
+ if (logicalOrientation == ui::Rotation::Rotation90) {
+ logicalOrientation = ui::Rotation::Rotation270;
+ } else if (logicalOrientation == ui::Rotation::Rotation270) {
+ logicalOrientation = ui::Rotation::Rotation90;
+ }
+
+ const ui::Rotation orientation = display.getPhysicalOrientation() + logicalOrientation;
+
+ switch (orientation) {
+ case ui::ROTATION_0:
+ return rotation;
+
+ case ui::ROTATION_90:
+ inverseRotate90 = ui::Transform::ROT_90;
+ inverseReflect = ui::Transform::ROT_180;
+ break;
+
+ case ui::ROTATION_180:
+ inverseReflect = ui::Transform::ROT_180;
+ break;
+
+ case ui::ROTATION_270:
+ inverseRotate90 = ui::Transform::ROT_90;
+ break;
+ }
+
+ const uint32_t rotate90 = rotation & ui::Transform::ROT_90;
+ uint32_t reflect = rotation & ui::Transform::ROT_180;
+
+ // Apply reflection for double rotation.
+ if (rotate90 & inverseRotate90) {
+ reflect = ~reflect & ui::Transform::ROT_180;
+ }
+
+ return static_cast<RenderArea::RotationFlags>((rotate90 ^ inverseRotate90) |
+ (reflect ^ inverseReflect));
+}
+
+} // namespace
+
+std::unique_ptr<RenderArea> DisplayRenderArea::create(wp<const DisplayDevice> displayWeak,
+ const Rect& sourceCrop, ui::Size reqSize,
+ ui::Dataspace reqDataSpace,
+ RotationFlags rotation,
+ bool allowSecureLayers) {
+ if (auto display = displayWeak.promote()) {
+ // Using new to access a private constructor.
+ return std::unique_ptr<DisplayRenderArea>(
+ new DisplayRenderArea(std::move(display), sourceCrop, reqSize, reqDataSpace,
+ rotation, allowSecureLayers));
+ }
+ return nullptr;
+}
+
+DisplayRenderArea::DisplayRenderArea(sp<const DisplayDevice> display, const Rect& sourceCrop,
+ ui::Size reqSize, ui::Dataspace reqDataSpace,
+ RotationFlags rotation, bool allowSecureLayers)
+ : RenderArea(reqSize, CaptureFill::OPAQUE, reqDataSpace, display->getViewport(),
+ applyDeviceOrientation(rotation, *display)),
+ mDisplay(std::move(display)),
+ mSourceCrop(sourceCrop),
+ mAllowSecureLayers(allowSecureLayers) {}
+
+const ui::Transform& DisplayRenderArea::getTransform() const {
+ return mTransform;
+}
+
+Rect DisplayRenderArea::getBounds() const {
+ return mDisplay->getBounds();
+}
+
+int DisplayRenderArea::getHeight() const {
+ return mDisplay->getHeight();
+}
+
+int DisplayRenderArea::getWidth() const {
+ return mDisplay->getWidth();
+}
+
+bool DisplayRenderArea::isSecure() const {
+ return mAllowSecureLayers && mDisplay->isSecure();
+}
+
+sp<const DisplayDevice> DisplayRenderArea::getDisplayDevice() const {
+ return mDisplay;
+}
+
+bool DisplayRenderArea::needsFiltering() const {
+ // check if the projection from the logical render area
+ // to the physical render area requires filtering
+ const Rect& sourceCrop = getSourceCrop();
+ int width = sourceCrop.width();
+ int height = sourceCrop.height();
+ if (getRotationFlags() & ui::Transform::ROT_90) {
+ std::swap(width, height);
+ }
+ return width != getReqWidth() || height != getReqHeight();
+}
+
+Rect DisplayRenderArea::getSourceCrop() const {
+ // use the projected display viewport by default.
+ if (mSourceCrop.isEmpty()) {
+ return mDisplay->getSourceClip();
+ }
+
+ // If there is a source crop provided then it is assumed that the device
+ // was in portrait orientation. This may not logically be true, so
+ // correct for the orientation error by undoing the rotation
+
+ ui::Rotation logicalOrientation = mDisplay->getOrientation();
+ if (logicalOrientation == ui::Rotation::Rotation90) {
+ logicalOrientation = ui::Rotation::Rotation270;
+ } else if (logicalOrientation == ui::Rotation::Rotation270) {
+ logicalOrientation = ui::Rotation::Rotation90;
+ }
+
+ const auto flags = ui::Transform::toRotationFlags(logicalOrientation);
+ int width = mDisplay->getSourceClip().getWidth();
+ int height = mDisplay->getSourceClip().getHeight();
+ ui::Transform rotation;
+ rotation.set(flags, width, height);
+ return rotation.transform(mSourceCrop);
+}
+
+} // namespace android
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