1 /*
2 * Copyright 2020 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include "DisplayRenderArea.h"
18 #include "DisplayDevice.h"
19
20 namespace android {
21 namespace {
22
applyDeviceOrientation(bool useIdentityTransform,const DisplayDevice & display)23 RenderArea::RotationFlags applyDeviceOrientation(bool useIdentityTransform,
24 const DisplayDevice& display) {
25 if (!useIdentityTransform) {
26 return RenderArea::RotationFlags::ROT_0;
27 }
28
29 return ui::Transform::toRotationFlags(display.getOrientation());
30 }
31
32 } // namespace
33
create(wp<const DisplayDevice> displayWeak,const Rect & sourceCrop,ui::Size reqSize,ui::Dataspace reqDataSpace,bool useIdentityTransform,bool allowSecureLayers)34 std::unique_ptr<RenderArea> DisplayRenderArea::create(wp<const DisplayDevice> displayWeak,
35 const Rect& sourceCrop, ui::Size reqSize,
36 ui::Dataspace reqDataSpace,
37 bool useIdentityTransform,
38 bool allowSecureLayers) {
39 if (auto display = displayWeak.promote()) {
40 // Using new to access a private constructor.
41 return std::unique_ptr<DisplayRenderArea>(
42 new DisplayRenderArea(std::move(display), sourceCrop, reqSize, reqDataSpace,
43 useIdentityTransform, allowSecureLayers));
44 }
45 return nullptr;
46 }
47
DisplayRenderArea(sp<const DisplayDevice> display,const Rect & sourceCrop,ui::Size reqSize,ui::Dataspace reqDataSpace,bool useIdentityTransform,bool allowSecureLayers)48 DisplayRenderArea::DisplayRenderArea(sp<const DisplayDevice> display, const Rect& sourceCrop,
49 ui::Size reqSize, ui::Dataspace reqDataSpace,
50 bool useIdentityTransform, bool allowSecureLayers)
51 : RenderArea(reqSize, CaptureFill::OPAQUE, reqDataSpace, display->getLayerStackSpaceRect(),
52 allowSecureLayers, applyDeviceOrientation(useIdentityTransform, *display)),
53 mDisplay(std::move(display)),
54 mSourceCrop(sourceCrop) {}
55
getTransform() const56 const ui::Transform& DisplayRenderArea::getTransform() const {
57 return mTransform;
58 }
59
getBounds() const60 Rect DisplayRenderArea::getBounds() const {
61 return mDisplay->getBounds();
62 }
63
getHeight() const64 int DisplayRenderArea::getHeight() const {
65 return mDisplay->getHeight();
66 }
67
getWidth() const68 int DisplayRenderArea::getWidth() const {
69 return mDisplay->getWidth();
70 }
71
isSecure() const72 bool DisplayRenderArea::isSecure() const {
73 return mAllowSecureLayers && mDisplay->isSecure();
74 }
75
getDisplayDevice() const76 sp<const DisplayDevice> DisplayRenderArea::getDisplayDevice() const {
77 return mDisplay;
78 }
79
needsFiltering() const80 bool DisplayRenderArea::needsFiltering() const {
81 // check if the projection from the logical render area
82 // to the physical render area requires filtering
83 const Rect& sourceCrop = getSourceCrop();
84 int width = sourceCrop.width();
85 int height = sourceCrop.height();
86 if (getRotationFlags() & ui::Transform::ROT_90) {
87 std::swap(width, height);
88 }
89 return width != getReqWidth() || height != getReqHeight();
90 }
91
getSourceCrop() const92 Rect DisplayRenderArea::getSourceCrop() const {
93 // use the projected display viewport by default.
94 if (mSourceCrop.isEmpty()) {
95 return mDisplay->getLayerStackSpaceRect();
96 }
97
98 // Correct for the orientation when the screen capture request contained
99 // useIdentityTransform. This will cause the rotation flag to be non 0 since
100 // it needs to rotate based on the screen orientation to allow the screenshot
101 // to be taken in the ROT_0 orientation
102 const auto flags = getRotationFlags();
103 int width = mDisplay->getLayerStackSpaceRect().getWidth();
104 int height = mDisplay->getLayerStackSpaceRect().getHeight();
105 ui::Transform rotation;
106 rotation.set(flags, width, height);
107 return rotation.transform(mSourceCrop);
108 }
109
110 } // namespace android