160 lines
4.5 KiB
C++
160 lines
4.5 KiB
C++
/*
|
|
* Copyright (C) 2007 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.
|
|
*/
|
|
|
|
#ifndef ANDROID_UI_SHARED_STATE_H
|
|
#define ANDROID_UI_SHARED_STATE_H
|
|
|
|
#include <stdint.h>
|
|
#include <sys/types.h>
|
|
|
|
#include <utils/threads.h>
|
|
|
|
namespace android {
|
|
|
|
/*
|
|
* These structures are shared between the composer process and its clients
|
|
*/
|
|
|
|
// ---------------------------------------------------------------------------
|
|
|
|
struct surface_info_t { // 4 longs, 16 bytes
|
|
enum {
|
|
eBufferDirty = 0x01,
|
|
eNeedNewBuffer = 0x02
|
|
};
|
|
uint8_t reserved[11];
|
|
uint8_t flags;
|
|
status_t status;
|
|
};
|
|
|
|
// ---------------------------------------------------------------------------
|
|
|
|
const uint32_t NUM_LAYERS_MAX = 31;
|
|
|
|
enum { // layer_cblk_t swapState
|
|
eIndex = 0x00000001,
|
|
eFlipRequested = 0x00000002,
|
|
|
|
eResizeBuffer0 = 0x00000004,
|
|
eResizeBuffer1 = 0x00000008,
|
|
eResizeRequested = eResizeBuffer0 | eResizeBuffer1,
|
|
|
|
eBusy = 0x00000010,
|
|
eLocked = 0x00000020,
|
|
eNextFlipPending = 0x00000040,
|
|
eInvalidSurface = 0x00000080
|
|
};
|
|
|
|
enum { // layer_cblk_t flags
|
|
eLayerNotPosted = 0x00000001,
|
|
eNoCopyBack = 0x00000002,
|
|
eReserved = 0x0000007C,
|
|
eBufferIndexShift = 7,
|
|
eBufferIndex = 1<<eBufferIndexShift,
|
|
};
|
|
|
|
struct flat_region_t // 40 bytes
|
|
{
|
|
int32_t count;
|
|
int16_t l;
|
|
int16_t t;
|
|
int16_t r;
|
|
int16_t b;
|
|
uint16_t runs[14];
|
|
};
|
|
|
|
struct layer_cblk_t // (128 bytes)
|
|
{
|
|
volatile int32_t swapState; // 4
|
|
volatile int32_t flags; // 4
|
|
volatile int32_t identity; // 4
|
|
int32_t reserved; // 4
|
|
surface_info_t surface[2]; // 32
|
|
flat_region_t region[2]; // 80
|
|
|
|
static inline int backBuffer(uint32_t state) {
|
|
return ((state & eIndex) ^ ((state & eFlipRequested)>>1));
|
|
}
|
|
static inline int frontBuffer(uint32_t state) {
|
|
return 1 - backBuffer(state);
|
|
}
|
|
};
|
|
|
|
// ---------------------------------------------------------------------------
|
|
|
|
struct per_client_cblk_t // 4KB max
|
|
{
|
|
Mutex lock;
|
|
Condition cv;
|
|
layer_cblk_t layers[NUM_LAYERS_MAX] __attribute__((aligned(32)));
|
|
|
|
enum {
|
|
BLOCKING = 0x00000001,
|
|
INSPECT = 0x00000002
|
|
};
|
|
|
|
// these functions are used by the clients
|
|
status_t validate(size_t i) const;
|
|
int32_t lock_layer(size_t i, uint32_t flags);
|
|
uint32_t unlock_layer_and_post(size_t i);
|
|
void unlock_layer(size_t i);
|
|
};
|
|
// ---------------------------------------------------------------------------
|
|
|
|
const uint32_t NUM_DISPLAY_MAX = 4;
|
|
|
|
struct display_cblk_t
|
|
{
|
|
uint16_t w;
|
|
uint16_t h;
|
|
uint8_t format;
|
|
uint8_t orientation;
|
|
uint8_t reserved[2];
|
|
float fps;
|
|
float density;
|
|
float xdpi;
|
|
float ydpi;
|
|
uint32_t pad[2];
|
|
};
|
|
|
|
struct surface_flinger_cblk_t // 4KB max
|
|
{
|
|
uint8_t connected;
|
|
uint8_t reserved[3];
|
|
uint32_t pad[7];
|
|
display_cblk_t displays[NUM_DISPLAY_MAX];
|
|
};
|
|
|
|
// ---------------------------------------------------------------------------
|
|
|
|
template<bool> struct CTA;
|
|
template<> struct CTA<true> { };
|
|
|
|
// compile-time assertions. just to avoid catastrophes.
|
|
inline void compile_time_asserts() {
|
|
CTA<sizeof(layer_cblk_t) == 128> sizeof__layer_cblk_t__eq_128;
|
|
(void)sizeof__layer_cblk_t__eq_128; // we don't want a warning
|
|
CTA<sizeof(per_client_cblk_t) <= 4096> sizeof__per_client_cblk_t__le_4096;
|
|
(void)sizeof__per_client_cblk_t__le_4096; // we don't want a warning
|
|
CTA<sizeof(surface_flinger_cblk_t) <= 4096> sizeof__surface_flinger_cblk_t__le_4096;
|
|
(void)sizeof__surface_flinger_cblk_t__le_4096; // we don't want a warning
|
|
}
|
|
|
|
}; // namespace android
|
|
|
|
#endif // ANDROID_UI_SHARED_STATE_H
|
|
|