cbb288bfe8
Rewrote SurfaceFlinger's buffer management from the ground-up. The design now support an arbitrary number of buffers per surface, however the current implementation is limited to four. Currently only 2 buffers are used in practice. The main new feature is to be able to dequeue all buffers at once (very important when there are only two). A client can dequeue all buffers until there are none available, it can lock all buffers except the last one that is used for composition. The client will block then, until a new buffer is enqueued. The current implementation requires that buffers are locked in the same order they are dequeued and enqueued in the same order they are locked. Only one buffer can be locked at a time. eg. Allowed sequence: DQ, DQ, LOCK, Q, LOCK, Q eg. Forbidden sequence: DQ, DQ, LOCK, LOCK, Q, Q
74 lines
2.0 KiB
C++
74 lines
2.0 KiB
C++
/*
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* Copyright (C) 2008 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef ANDROID_COMPOSER_LAYER_STATE_H
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#define ANDROID_COMPOSER_LAYER_STATE_H
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#include <stdint.h>
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#include <sys/types.h>
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#include <utils/Errors.h>
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#include <ui/ISurfaceFlingerClient.h>
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#include <ui/Region.h>
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namespace android {
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class Parcel;
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struct layer_state_t {
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layer_state_t()
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: surface(0), what(0),
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x(0), y(0), z(0), w(0), h(0),
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alpha(0), tint(0), flags(0), mask(0),
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reserved(0)
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{
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matrix.dsdx = matrix.dtdy = 1.0f;
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matrix.dsdy = matrix.dtdx = 0.0f;
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}
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status_t write(Parcel& output) const;
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status_t read(const Parcel& input);
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struct matrix22_t {
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float dsdx;
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float dtdx;
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float dsdy;
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float dtdy;
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};
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SurfaceID surface;
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uint32_t what;
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int32_t x;
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int32_t y;
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uint32_t z;
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uint32_t w;
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uint32_t h;
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float alpha;
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uint32_t tint;
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uint8_t flags;
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uint8_t mask;
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uint8_t reserved;
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matrix22_t matrix;
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// non POD must be last. see write/read
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Region transparentRegion;
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};
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}; // namespace android
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#endif // ANDROID_COMPOSER_LAYER_STATE_H
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