/*
* 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.
*/
#define LOG_TAG "SurfaceFlinger"
#include <stdlib.h>
#include <stdint.h>
#include <math.h>
#include <sys/types.h>
#include <utils/Errors.h>
#include <utils/Log.h>
#include <utils/StopWatch.h>
#include <utils/IPCThreadState.h>
#include <utils/IServiceManager.h>
#include <ui/PixelFormat.h>
#include <ui/EGLDisplaySurface.h>
#include "LayerBuffer.h"
#include "SurfaceFlinger.h"
#include "VRamHeap.h"
#include "DisplayHardware/DisplayHardware.h"
namespace android {
// ---------------------------------------------------------------------------
const uint32_t LayerBuffer::typeInfo = LayerBaseClient::typeInfo | 0x20;
const char* const LayerBuffer::typeID = "LayerBuffer";
// ---------------------------------------------------------------------------
LayerBuffer::LayerBuffer(SurfaceFlinger* flinger, DisplayID display,
Client* client, int32_t i)
: LayerBaseClient(flinger, display, client, i),
mNeedsBlending(false)
{
}
LayerBuffer::~LayerBuffer()
{
sp<SurfaceBuffer> s(getClientSurface());
if (s != 0) {
s->disown();
mClientSurface.clear();
}
}
sp<LayerBuffer::SurfaceBuffer> LayerBuffer::getClientSurface() const
{
Mutex::Autolock _l(mLock);
return mClientSurface.promote();
}
sp<LayerBaseClient::Surface> LayerBuffer::getSurface() const
{
sp<SurfaceBuffer> s;
Mutex::Autolock _l(mLock);
s = mClientSurface.promote();
if (s == 0) {
s = new SurfaceBuffer(clientIndex(),
const_cast<LayerBuffer *>(this));
mClientSurface = s;
}
return s;
}
bool LayerBuffer::needsBlending() const {
return mNeedsBlending;
}
void LayerBuffer::setNeedsBlending(bool blending) {
mNeedsBlending = blending;
}
void LayerBuffer::postBuffer(ssize_t offset)
{
sp<Source> source(getSource());
if (source != 0)
source->postBuffer(offset);
}
void LayerBuffer::unregisterBuffers()
{
sp<Source> source(clearSource());
if (source != 0)
source->unregisterBuffers();
}
uint32_t LayerBuffer::doTransaction(uint32_t flags)
{
sp<Source> source(getSource());
if (source != 0)
source->onTransaction(flags);
return LayerBase::doTransaction(flags);
}
void LayerBuffer::unlockPageFlip(const Transform& planeTransform,
Region& outDirtyRegion)
{
// this code-path must be as tight as possible, it's called each time
// the screen is composited.
sp<Source> source(getSource());
if (source != 0)
source->onVisibilityResolved(planeTransform);
LayerBase::unlockPageFlip(planeTransform, outDirtyRegion);
}
void LayerBuffer::onDraw(const Region& clip) const
{
sp<Source> source(getSource());
if (LIKELY(source != 0)) {
source->onDraw(clip);
} else {
clearWithOpenGL(clip);
}
}
bool LayerBuffer::transformed() const
{
sp<Source> source(getSource());
if (LIKELY(source != 0))
return source->transformed();
return false;
}
/**
* This creates a "buffer" source for this surface
*/
status_t LayerBuffer::registerBuffers(const ISurface::BufferHeap& buffers)
{
Mutex::Autolock _l(mLock);
if (mSource != 0)
return INVALID_OPERATION;
sp<BufferSource> source = new BufferSource(*this, buffers);
status_t result = source->getStatus();
if (result == NO_ERROR) {
mSource = source;
}
return result;
}
/**
* This creates an "overlay" source for this surface
*/
sp<OverlayRef> LayerBuffer::createOverlay(uint32_t w, uint32_t h, int32_t f)
{
sp<OverlayRef> result;
Mutex::Autolock _l(mLock);
if (mSource != 0)
return result;
sp<OverlaySource> source = new OverlaySource(*this, &result, w, h, f);
if (result != 0) {
mSource = source;
}
return result;
}
sp<LayerBuffer::Source> LayerBuffer::getSource() const {
Mutex::Autolock _l(mLock);
return mSource;
}
sp<LayerBuffer::Source> LayerBuffer::clearSource() {
sp<Source> source;
Mutex::Autolock _l(mLock);
source = mSource;
mSource.clear();
return source;
}
// ============================================================================
// LayerBuffer::SurfaceBuffer
// ============================================================================
LayerBuffer::SurfaceBuffer::SurfaceBuffer(SurfaceID id, LayerBuffer* owner)
: LayerBaseClient::Surface(id, owner->getIdentity()), mOwner(owner)
{
}
LayerBuffer::SurfaceBuffer::~SurfaceBuffer()
{
unregisterBuffers();
mOwner = 0;
}
status_t LayerBuffer::SurfaceBuffer::onTransact(
uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
{
switch (code) {
case REGISTER_BUFFERS:
case UNREGISTER_BUFFERS:
case CREATE_OVERLAY:
{
// codes that require permission check
IPCThreadState* ipc = IPCThreadState::self();
const int pid = ipc->getCallingPid();
const int self_pid = getpid();
if (LIKELY(pid != self_pid)) {
// we're called from a different process, do the real check
if (!checkCallingPermission(
String16("android.permission.ACCESS_SURFACE_FLINGER")))
{
const int uid = ipc->getCallingUid();
LOGE("Permission Denial: "
"can't access SurfaceFlinger pid=%d, uid=%d", pid, uid);
return PERMISSION_DENIED;
}
}
}
}
return LayerBaseClient::Surface::onTransact(code, data, reply, flags);
}
status_t LayerBuffer::SurfaceBuffer::registerBuffers(const ISurface::BufferHeap& buffers)
{
LayerBuffer* owner(getOwner());
if (owner)
return owner->registerBuffers(buffers);
return NO_INIT;
}
void LayerBuffer::SurfaceBuffer::postBuffer(ssize_t offset)
{
LayerBuffer* owner(getOwner());
if (owner)
owner->postBuffer(offset);
}
void LayerBuffer::SurfaceBuffer::unregisterBuffers()
{
LayerBuffer* owner(getOwner());
if (owner)
owner->unregisterBuffers();
}
sp<OverlayRef> LayerBuffer::SurfaceBuffer::createOverlay(
uint32_t w, uint32_t h, int32_t format) {
sp<OverlayRef> result;
LayerBuffer* owner(getOwner());
if (owner)
result = owner->createOverlay(w, h, format);
return result;
}
void LayerBuffer::SurfaceBuffer::disown()
{
Mutex::Autolock _l(mLock);
mOwner = 0;
}
// ============================================================================
// LayerBuffer::Buffer
// ============================================================================
LayerBuffer::Buffer::Buffer(const ISurface::BufferHeap& buffers, ssize_t offset)
: mBufferHeap(buffers)
{
NativeBuffer& src(mNativeBuffer);
src.crop.l = 0;
src.crop.t = 0;
src.crop.r = buffers.w;
src.crop.b = buffers.h;
src.img.w = buffers.hor_stride ?: buffers.w;
src.img.h = buffers.ver_stride ?: buffers.h;
src.img.format = buffers.format;
src.img.offset = offset;
src.img.base = buffers.heap->base();
src.img.fd = buffers.heap->heapID();
}
LayerBuffer::Buffer::~Buffer()
{
}
// ============================================================================
// LayerBuffer::Source
// LayerBuffer::BufferSource
// LayerBuffer::OverlaySource
// ============================================================================
LayerBuffer::Source::Source(LayerBuffer& layer)
: mLayer(layer)
{
}
LayerBuffer::Source::~Source() {
}
void LayerBuffer::Source::onDraw(const Region& clip) const {
}
void LayerBuffer::Source::onTransaction(uint32_t flags) {
}
void LayerBuffer::Source::onVisibilityResolved(
const Transform& planeTransform) {
}
void LayerBuffer::Source::postBuffer(ssize_t offset) {
}
void LayerBuffer::Source::unregisterBuffers() {
}
bool LayerBuffer::Source::transformed() const {
return mLayer.mTransformed;
}
// ---------------------------------------------------------------------------
LayerBuffer::BufferSource::BufferSource(LayerBuffer& layer,
const ISurface::BufferHeap& buffers)
: Source(layer), mStatus(NO_ERROR),
mBufferSize(0), mTextureName(-1U)
{
if (buffers.heap == NULL) {
// this is allowed, but in this case, it is illegal to receive
// postBuffer(). The surface just erases the framebuffer with
// fully transparent pixels.
mBufferHeap = buffers;
mLayer.setNeedsBlending(false);
return;
}
status_t err = (buffers.heap->heapID() >= 0) ? NO_ERROR : NO_INIT;
if (err != NO_ERROR) {
LOGE("LayerBuffer::BufferSource: invalid heap (%s)", strerror(err));
mStatus = err;
return;
}
PixelFormatInfo info;
err = getPixelFormatInfo(buffers.format, &info);
if (err != NO_ERROR) {
LOGE("LayerBuffer::BufferSource: invalid format %d (%s)",
buffers.format, strerror(err));
mStatus = err;
return;
}
if (buffers.hor_stride<0 || buffers.ver_stride<0) {
LOGE("LayerBuffer::BufferSource: invalid parameters "
"(w=%d, h=%d, xs=%d, ys=%d)",
buffers.w, buffers.h, buffers.hor_stride, buffers.ver_stride);
mStatus = BAD_VALUE;
return;
}
mBufferHeap = buffers;
mLayer.setNeedsBlending((info.h_alpha - info.l_alpha) > 0);
mBufferSize = info.getScanlineSize(buffers.hor_stride)*buffers.ver_stride;
mLayer.forceVisibilityTransaction();
}
LayerBuffer::BufferSource::~BufferSource()
{
if (mTextureName != -1U) {
LayerBase::deletedTextures.add(mTextureName);
}
}
void LayerBuffer::BufferSource::postBuffer(ssize_t offset)
{
ISurface::BufferHeap buffers;
{ // scope for the lock
Mutex::Autolock _l(mLock);
buffers = mBufferHeap;
if (buffers.heap != 0) {
const size_t memorySize = buffers.heap->getSize();
if ((size_t(offset) + mBufferSize) > memorySize) {
LOGE("LayerBuffer::BufferSource::postBuffer() "
"invalid buffer (offset=%d, size=%d, heap-size=%d",
int(offset), int(mBufferSize), int(memorySize));
return;
}
}
}
sp<Buffer> buffer;
if (buffers.heap != 0) {
buffer = new LayerBuffer::Buffer(buffers, offset);
if (buffer->getStatus() != NO_ERROR)
buffer.clear();
setBuffer(buffer);
mLayer.invalidate();
}
}
void LayerBuffer::BufferSource::unregisterBuffers()
{
Mutex::Autolock _l(mLock);
mBufferHeap.heap.clear();
mBuffer.clear();
mLayer.invalidate();
}
sp<LayerBuffer::Buffer> LayerBuffer::BufferSource::getBuffer() const
{
Mutex::Autolock _l(mLock);
return mBuffer;
}
void LayerBuffer::BufferSource::setBuffer(const sp<LayerBuffer::Buffer>& buffer)
{
Mutex::Autolock _l(mLock);
mBuffer = buffer;
}
bool LayerBuffer::BufferSource::transformed() const
{
return mBufferHeap.transform ? true : Source::transformed();
}
void LayerBuffer::BufferSource::onDraw(const Region& clip) const
{
sp<Buffer> buffer(getBuffer());
if (UNLIKELY(buffer == 0)) {
// nothing to do, we don't have a buffer
mLayer.clearWithOpenGL(clip);
return;
}
status_t err = NO_ERROR;
NativeBuffer src(buffer->getBuffer());
const Rect& transformedBounds = mLayer.getTransformedBounds();
const int can_use_copybit = mLayer.canUseCopybit();
if (can_use_copybit) {
const int src_width = src.crop.r - src.crop.l;
const int src_height = src.crop.b - src.crop.t;
int W = transformedBounds.width();
int H = transformedBounds.height();
if (mLayer.getOrientation() & Transform::ROT_90) {
int t(W); W=H; H=t;
}
/* With LayerBuffer, it is likely that we'll have to rescale the
* surface, because this is often used for video playback or
* camera-preview. Since we want these operation as fast as possible
* we make sure we can use the 2D H/W even if it doesn't support
* the requested scale factor, in which case we perform the scaling
* in several passes. */
copybit_device_t* copybit = mLayer.mFlinger->getBlitEngine();
const float min = copybit->get(copybit, COPYBIT_MINIFICATION_LIMIT);
const float mag = copybit->get(copybit, COPYBIT_MAGNIFICATION_LIMIT);
float xscale = 1.0f;
if (src_width > W*min) xscale = 1.0f / min;
else if (src_width*mag < W) xscale = mag;
float yscale = 1.0f;
if (src_height > H*min) yscale = 1.0f / min;
else if (src_height*mag < H) yscale = mag;
if (UNLIKELY(xscale!=1.0f || yscale!=1.0f)) {
if (UNLIKELY(mTemporaryDealer == 0)) {
// allocate a memory-dealer for this the first time
mTemporaryDealer = mLayer.mFlinger->getSurfaceHeapManager()
->createHeap(ISurfaceComposer::eHardware);
mTempBitmap.init(mTemporaryDealer);
}
const int tmp_w = floorf(src_width * xscale);
const int tmp_h = floorf(src_height * yscale);
err = mTempBitmap.setBits(tmp_w, tmp_h, 1, src.img.format);
if (LIKELY(err == NO_ERROR)) {
NativeBuffer tmp;
mTempBitmap.getBitmapSurface(&tmp.img);
tmp.crop.l = 0;
tmp.crop.t = 0;
tmp.crop.r = tmp.img.w;
tmp.crop.b = tmp.img.h;
region_iterator tmp_it(Region(Rect(tmp.crop.r, tmp.crop.b)));
copybit->set_parameter(copybit, COPYBIT_TRANSFORM, 0);
copybit->set_parameter(copybit, COPYBIT_PLANE_ALPHA, 0xFF);
copybit->set_parameter(copybit, COPYBIT_DITHER, COPYBIT_DISABLE);
err = copybit->stretch(copybit,
&tmp.img, &src.img, &tmp.crop, &src.crop, &tmp_it);
src = tmp;
}
}
const DisplayHardware& hw(mLayer.graphicPlane(0).displayHardware());
copybit_image_t dst;
hw.getDisplaySurface(&dst);
const copybit_rect_t& drect
= reinterpret_cast<const copybit_rect_t&>(transformedBounds);
const State& s(mLayer.drawingState());
region_iterator it(clip);
// pick the right orientation for this buffer
int orientation = mLayer.getOrientation();
if (UNLIKELY(mBufferHeap.transform)) {
Transform rot90;
GraphicPlane::orientationToTransfrom(
ISurfaceComposer::eOrientation90, 0, 0, &rot90);
const Transform& planeTransform(mLayer.graphicPlane(0).transform());
const Layer::State& s(mLayer.drawingState());
Transform tr(planeTransform * s.transform * rot90);
orientation = tr.getOrientation();
}
copybit->set_parameter(copybit, COPYBIT_TRANSFORM, orientation);
copybit->set_parameter(copybit, COPYBIT_PLANE_ALPHA, s.alpha);
copybit->set_parameter(copybit, COPYBIT_DITHER, COPYBIT_ENABLE);
err = copybit->stretch(copybit,
&dst, &src.img, &drect, &src.crop, &it);
if (err != NO_ERROR) {
LOGE("copybit failed (%s)", strerror(err));
}
}
if (!can_use_copybit || err) {
if (UNLIKELY(mTextureName == -1LU)) {
mTextureName = mLayer.createTexture();
}
GLuint w = 0;
GLuint h = 0;
GGLSurface t;
t.version = sizeof(GGLSurface);
t.width = src.crop.r;
t.height = src.crop.b;
t.stride = src.img.w;
t.vstride= src.img.h;
t.format = src.img.format;
t.data = (GGLubyte*)(intptr_t(src.img.base) + src.img.offset);
const Region dirty(Rect(t.width, t.height));
mLayer.loadTexture(dirty, mTextureName, t, w, h);
mLayer.drawWithOpenGL(clip, mTextureName, t, mBufferHeap.transform);
}
}
// ---------------------------------------------------------------------------
LayerBuffer::OverlaySource::OverlaySource(LayerBuffer& layer,
sp<OverlayRef>* overlayRef,
uint32_t w, uint32_t h, int32_t format)
: Source(layer), mVisibilityChanged(false),
mOverlay(0), mOverlayHandle(0), mOverlayDevice(0)
{
overlay_control_device_t* overlay_dev = mLayer.mFlinger->getOverlayEngine();
if (overlay_dev == NULL) {
// overlays not supported
return;
}
mOverlayDevice = overlay_dev;
overlay_t* overlay = overlay_dev->createOverlay(overlay_dev, w, h, format);
if (overlay == NULL) {
// couldn't create the overlay (no memory? no more overlays?)
return;
}
// enable dithering...
overlay_dev->setParameter(overlay_dev, overlay,
OVERLAY_DITHER, OVERLAY_ENABLE);
mOverlay = overlay;
mWidth = overlay->w;
mHeight = overlay->h;
mFormat = overlay->format;
mWidthStride = overlay->w_stride;
mHeightStride = overlay->h_stride;
mOverlayHandle = overlay->getHandleRef(overlay);
// NOTE: here it's okay to acquire a reference to "this"m as long as
// the reference is not released before we leave the ctor.
sp<OverlayChannel> channel = new OverlayChannel(this);
*overlayRef = new OverlayRef(mOverlayHandle, channel,
mWidth, mHeight, mFormat, mWidthStride, mHeightStride);
}
LayerBuffer::OverlaySource::~OverlaySource()
{
if (mOverlay && mOverlayDevice) {
overlay_control_device_t* overlay_dev = mOverlayDevice;
overlay_dev->destroyOverlay(overlay_dev, mOverlay);
}
}
void LayerBuffer::OverlaySource::onTransaction(uint32_t flags)
{
const Layer::State& front(mLayer.drawingState());
const Layer::State& temp(mLayer.currentState());
if (temp.sequence != front.sequence) {
mVisibilityChanged = true;
}
}
void LayerBuffer::OverlaySource::onVisibilityResolved(
const Transform& planeTransform)
{
// this code-path must be as tight as possible, it's called each time
// the screen is composited.
if (UNLIKELY(mOverlay != 0)) {
if (mVisibilityChanged) {
mVisibilityChanged = false;
const Rect& bounds = mLayer.getTransformedBounds();
int x = bounds.left;
int y = bounds.top;
int w = bounds.width();
int h = bounds.height();
// we need a lock here to protect "destroy"
Mutex::Autolock _l(mLock);
if (mOverlay) {
overlay_control_device_t* overlay_dev = mOverlayDevice;
overlay_dev->setPosition(overlay_dev, mOverlay, x,y,w,h);
overlay_dev->setParameter(overlay_dev, mOverlay,
OVERLAY_TRANSFORM, mLayer.getOrientation());
}
}
}
}
void LayerBuffer::OverlaySource::serverDestroy()
{
mLayer.clearSource();
destroyOverlay();
}
void LayerBuffer::OverlaySource::destroyOverlay()
{
// we need a lock here to protect "onVisibilityResolved"
Mutex::Autolock _l(mLock);
if (mOverlay) {
overlay_control_device_t* overlay_dev = mOverlayDevice;
overlay_dev->destroyOverlay(overlay_dev, mOverlay);
mOverlay = 0;
}
}
// ---------------------------------------------------------------------------
}; // namespace android