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/*
* Copyright (C) 2011 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 "LayerRejecter.h"
#include <gui/BufferItem.h>
#include <system/window.h>
#define DEBUG_RESIZE 0
namespace android {
LayerRejecter::LayerRejecter(Layer::State& front,
Layer::State& current,
bool& recomputeVisibleRegions,
bool stickySet,
const char* name,
int32_t overrideScalingMode,
bool transformToDisplayInverse,
bool& freezePositionUpdates)
: mFront(front),
mCurrent(current),
mRecomputeVisibleRegions(recomputeVisibleRegions),
mStickyTransformSet(stickySet),
mName(name),
mOverrideScalingMode(overrideScalingMode),
mTransformToDisplayInverse(transformToDisplayInverse),
mFreezeGeometryUpdates(freezePositionUpdates) {}
bool LayerRejecter::reject(const sp<GraphicBuffer>& buf, const BufferItem& item) {
if (buf == nullptr) {
return false;
}
uint32_t bufWidth = buf->getWidth();
uint32_t bufHeight = buf->getHeight();
// check that we received a buffer of the right size
// (Take the buffer's orientation into account)
if (item.mTransform & ui::Transform::ROT_90) {
std::swap(bufWidth, bufHeight);
}
if (mTransformToDisplayInverse) {
uint32_t invTransform = DisplayDevice::getPrimaryDisplayOrientationTransform();
if (invTransform & ui::Transform::ROT_90) {
std::swap(bufWidth, bufHeight);
}
}
int actualScalingMode = mOverrideScalingMode >= 0 ? mOverrideScalingMode : item.mScalingMode;
bool isFixedSize = actualScalingMode != NATIVE_WINDOW_SCALING_MODE_FREEZE;
if (mFront.active_legacy != mFront.requested_legacy) {
if (isFixedSize ||
(bufWidth == mFront.requested_legacy.w && bufHeight == mFront.requested_legacy.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
mFront.active_legacy = mFront.requested_legacy;
// We also need to update the current state so that
// we don't end-up overwriting the drawing state with
// this stale current state during the next transaction
//
// NOTE: We don't need to hold the transaction lock here
// because State::active_legacy is only accessed from this thread.
mCurrent.active_legacy = mFront.active_legacy;
mCurrent.modified = true;
// recompute visible region
mRecomputeVisibleRegions = true;
mFreezeGeometryUpdates = false;
if (mFront.crop_legacy != mFront.requestedCrop_legacy) {
mFront.crop_legacy = mFront.requestedCrop_legacy;
mCurrent.crop_legacy = mFront.requestedCrop_legacy;
mRecomputeVisibleRegions = true;
}
}
ALOGD_IF(DEBUG_RESIZE,
"[%s] latchBuffer/reject: buffer (%ux%u, tr=%02x), scalingMode=%d\n"
" drawing={ active_legacy ={ wh={%4u,%4u} crop_legacy={%4d,%4d,%4d,%4d} "
"(%4d,%4d) "
"}\n"
" requested_legacy={ wh={%4u,%4u} }}\n",
mName, bufWidth, bufHeight, item.mTransform, item.mScalingMode,
mFront.active_legacy.w, mFront.active_legacy.h, mFront.crop_legacy.left,
mFront.crop_legacy.top, mFront.crop_legacy.right, mFront.crop_legacy.bottom,
mFront.crop_legacy.getWidth(), mFront.crop_legacy.getHeight(),
mFront.requested_legacy.w, mFront.requested_legacy.h);
}
if (!isFixedSize && !mStickyTransformSet) {
if (mFront.active_legacy.w != bufWidth || mFront.active_legacy.h != bufHeight) {
// reject this buffer
ALOGE("[%s] rejecting buffer: "
"bufWidth=%d, bufHeight=%d, front.active_legacy.{w=%d, h=%d}",
mName, bufWidth, bufHeight, mFront.active_legacy.w, mFront.active_legacy.h);
return true;
}
}
// if the transparent region has changed (this test is
// conservative, but that's fine, worst case we're doing
// a bit of extra work), we latch the new one and we
// trigger a visible-region recompute.
//
// We latch the transparent region here, instead of above where we latch
// the rest of the geometry because it is only content but not necessarily
// resize dependent.
if (!mFront.activeTransparentRegion_legacy.isTriviallyEqual(
mFront.requestedTransparentRegion_legacy)) {
mFront.activeTransparentRegion_legacy = mFront.requestedTransparentRegion_legacy;
// We also need to update the current state so that
// we don't end-up overwriting the drawing state with
// this stale current state during the next transaction
//
// NOTE: We don't need to hold the transaction lock here
// because State::active_legacy is only accessed from this thread.
mCurrent.activeTransparentRegion_legacy = mFront.activeTransparentRegion_legacy;
// recompute visible region
mRecomputeVisibleRegions = true;
}
return false;
}
} // namespace android
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