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/*
* 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.
*/
#include <stdlib.h>
#include <stdint.h>
#include <sys/types.h>
#include <cutils/compiler.h>
#include <cutils/native_handle.h>
#include <cutils/properties.h>
#include <utils/Errors.h>
#include <utils/Log.h>
#include <utils/StopWatch.h>
#include <ui/GraphicBuffer.h>
#include <ui/PixelFormat.h>
#include <surfaceflinger/Surface.h>
#include "clz.h"
#include "DisplayHardware/DisplayHardware.h"
#include "DisplayHardware/HWComposer.h"
#include "GLExtensions.h"
#include "Layer.h"
#include "SurfaceFlinger.h"
#include "SurfaceTextureLayer.h"
#define DEBUG_RESIZE 0
namespace android {
template <typename T> inline T min(T a, T b) {
return a<b ? a : b;
}
// ---------------------------------------------------------------------------
Layer::Layer(SurfaceFlinger* flinger,
DisplayID display, const sp<Client>& client)
: LayerBaseClient(flinger, display, client),
mTextureName(-1U),
mQueuedFrames(0),
mCurrentTransform(0),
mCurrentOpacity(true),
mFormat(PIXEL_FORMAT_NONE),
mGLExtensions(GLExtensions::getInstance()),
mOpaqueLayer(true),
mNeedsDithering(false),
mSecure(false),
mProtectedByApp(false),
mFixedSize(false)
{
mCurrentCrop.makeInvalid();
glGenTextures(1, &mTextureName);
}
void Layer::destroy(RefBase const* base) {
mFlinger->destroyLayer(static_cast<LayerBase const*>(base));
}
void Layer::onFirstRef()
{
LayerBaseClient::onFirstRef();
setDestroyer(this);
struct FrameQueuedListener : public SurfaceTexture::FrameAvailableListener {
FrameQueuedListener(Layer* layer) : mLayer(layer) { }
private:
wp<Layer> mLayer;
virtual void onFrameAvailable() {
sp<Layer> that(mLayer.promote());
if (that != 0) {
that->onFrameQueued();
}
}
};
mSurfaceTexture = new SurfaceTextureLayer(mTextureName, this);
mSurfaceTexture->setFrameAvailableListener(new FrameQueuedListener(this));
mSurfaceTexture->setSynchronousMode(true);
mSurfaceTexture->setBufferCountServer(2);
}
Layer::~Layer()
{
glDeleteTextures(1, &mTextureName);
}
void Layer::onFrameQueued() {
if (android_atomic_or(1, &mQueuedFrames) == 0) {
mFlinger->signalEvent();
}
}
// called with SurfaceFlinger::mStateLock as soon as the layer is entered
// in the purgatory list
void Layer::onRemoved()
{
}
sp<ISurface> Layer::createSurface()
{
class BSurface : public BnSurface, public LayerCleaner {
wp<const Layer> mOwner;
virtual sp<ISurfaceTexture> getSurfaceTexture() const {
sp<ISurfaceTexture> res;
sp<const Layer> that( mOwner.promote() );
if (that != NULL) {
res = that->mSurfaceTexture;
}
return res;
}
public:
BSurface(const sp<SurfaceFlinger>& flinger,
const sp<Layer>& layer)
: LayerCleaner(flinger, layer), mOwner(layer) { }
};
sp<ISurface> sur(new BSurface(mFlinger, this));
return sur;
}
status_t Layer::setBuffers( uint32_t w, uint32_t h,
PixelFormat format, uint32_t flags)
{
// this surfaces pixel format
PixelFormatInfo info;
status_t err = getPixelFormatInfo(format, &info);
if (err) return err;
// the display's pixel format
const DisplayHardware& hw(graphicPlane(0).displayHardware());
uint32_t const maxSurfaceDims = min(
hw.getMaxTextureSize(), hw.getMaxViewportDims());
// never allow a surface larger than what our underlying GL implementation
// can handle.
if ((uint32_t(w)>maxSurfaceDims) || (uint32_t(h)>maxSurfaceDims)) {
return BAD_VALUE;
}
PixelFormatInfo displayInfo;
getPixelFormatInfo(hw.getFormat(), &displayInfo);
const uint32_t hwFlags = hw.getFlags();
mFormat = format;
mSecure = (flags & ISurfaceComposer::eSecure) ? true : false;
mProtectedByApp = (flags & ISurfaceComposer::eProtectedByApp) ? true : false;
mOpaqueLayer = (flags & ISurfaceComposer::eOpaque);
mCurrentOpacity = getOpacityForFormat(format);
mSurfaceTexture->setDefaultBufferSize(w, h);
mSurfaceTexture->setDefaultBufferFormat(format);
// we use the red index
int displayRedSize = displayInfo.getSize(PixelFormatInfo::INDEX_RED);
int layerRedsize = info.getSize(PixelFormatInfo::INDEX_RED);
mNeedsDithering = layerRedsize > displayRedSize;
return NO_ERROR;
}
void Layer::setGeometry(hwc_layer_t* hwcl)
{
hwcl->compositionType = HWC_FRAMEBUFFER;
hwcl->hints = 0;
hwcl->flags = 0;
hwcl->transform = 0;
hwcl->blending = HWC_BLENDING_NONE;
// we can't do alpha-fade with the hwc HAL
const State& s(drawingState());
if (s.alpha < 0xFF) {
hwcl->flags = HWC_SKIP_LAYER;
return;
}
// we can only handle simple transformation
if (mOrientation & Transform::ROT_INVALID) {
hwcl->flags = HWC_SKIP_LAYER;
return;
}
// FIXME: shouldn't we take the state's transform into account here?
Transform tr(Transform(mOrientation) * Transform(mCurrentTransform));
hwcl->transform = tr.getOrientation();
if (!isOpaque()) {
hwcl->blending = mPremultipliedAlpha ?
HWC_BLENDING_PREMULT : HWC_BLENDING_COVERAGE;
}
hwcl->displayFrame.left = mTransformedBounds.left;
hwcl->displayFrame.top = mTransformedBounds.top;
hwcl->displayFrame.right = mTransformedBounds.right;
hwcl->displayFrame.bottom = mTransformedBounds.bottom;
hwcl->visibleRegionScreen.rects =
reinterpret_cast<hwc_rect_t const *>(
visibleRegionScreen.getArray(
&hwcl->visibleRegionScreen.numRects));
}
void Layer::setPerFrameData(hwc_layer_t* hwcl) {
const sp<GraphicBuffer>& buffer(mActiveBuffer);
if (buffer == NULL) {
// this can happen if the client never drew into this layer yet,
// or if we ran out of memory. In that case, don't let
// HWC handle it.
hwcl->flags |= HWC_SKIP_LAYER;
hwcl->handle = NULL;
return;
}
hwcl->handle = buffer->handle;
if (isCropped()) {
hwcl->sourceCrop.left = mCurrentCrop.left;
hwcl->sourceCrop.top = mCurrentCrop.top;
hwcl->sourceCrop.right = mCurrentCrop.right;
hwcl->sourceCrop.bottom = mCurrentCrop.bottom;
} else {
hwcl->sourceCrop.left = 0;
hwcl->sourceCrop.top = 0;
hwcl->sourceCrop.right = buffer->width;
hwcl->sourceCrop.bottom = buffer->height;
}
}
static inline uint16_t pack565(int r, int g, int b) {
return (r<<11)|(g<<5)|b;
}
void Layer::onDraw(const Region& clip) const
{
if (CC_UNLIKELY(mActiveBuffer == 0)) {
// the texture has not been created yet, this Layer has
// in fact never been drawn into. This happens frequently with
// SurfaceView because the WindowManager can't know when the client
// has drawn the first time.
// If there is nothing under us, we paint the screen in black, otherwise
// we just skip this update.
// figure out if there is something below us
Region under;
const SurfaceFlinger::LayerVector& drawingLayers(mFlinger->mDrawingState.layersSortedByZ);
const size_t count = drawingLayers.size();
for (size_t i=0 ; i<count ; ++i) {
const sp<LayerBase>& layer(drawingLayers[i]);
if (layer.get() == static_cast<LayerBase const*>(this))
break;
under.orSelf(layer->visibleRegionScreen);
}
// if not everything below us is covered, we plug the holes!
Region holes(clip.subtract(under));
if (!holes.isEmpty()) {
clearWithOpenGL(holes, 0, 0, 0, 1);
}
return;
}
GLenum target = mSurfaceTexture->getCurrentTextureTarget();
glBindTexture(target, mTextureName);
if (getFiltering() || needsFiltering() || isFixedSize() || isCropped()) {
// TODO: we could be more subtle with isFixedSize()
glTexParameterx(target, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameterx(target, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
} else {
glTexParameterx(target, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameterx(target, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
}
glEnable(target);
glMatrixMode(GL_TEXTURE);
glLoadMatrixf(mTextureMatrix);
glMatrixMode(GL_MODELVIEW);
drawWithOpenGL(clip);
glDisable(target);
}
// As documented in libhardware header, formats in the range
// 0x100 - 0x1FF are specific to the HAL implementation, and
// are known to have no alpha channel
// TODO: move definition for device-specific range into
// hardware.h, instead of using hard-coded values here.
#define HARDWARE_IS_DEVICE_FORMAT(f) ((f) >= 0x100 && (f) <= 0x1FF)
bool Layer::getOpacityForFormat(uint32_t format)
{
if (HARDWARE_IS_DEVICE_FORMAT(format)) {
return true;
}
PixelFormatInfo info;
status_t err = getPixelFormatInfo(PixelFormat(format), &info);
// in case of error (unknown format), we assume no blending
return (err || info.h_alpha <= info.l_alpha);
}
bool Layer::isOpaque() const
{
// if we don't have a buffer yet, we're translucent regardless of the
// layer's opaque flag.
if (mActiveBuffer == 0)
return false;
// if the layer has the opaque flag, then we're always opaque,
// otherwise we use the current buffer's format.
return mOpaqueLayer || mCurrentOpacity;
}
bool Layer::isProtected() const
{
const sp<GraphicBuffer>& activeBuffer(mActiveBuffer);
return (activeBuffer != 0) &&
(activeBuffer->getUsage() & GRALLOC_USAGE_PROTECTED);
}
uint32_t Layer::doTransaction(uint32_t flags)
{
const Layer::State& front(drawingState());
const Layer::State& temp(currentState());
const bool sizeChanged = (front.requested_w != temp.requested_w) ||
(front.requested_h != temp.requested_h);
if (sizeChanged) {
// the size changed, we need to ask our client to request a new buffer
LOGD_IF(DEBUG_RESIZE,
"resize (layer=%p), requested (%dx%d), drawing (%d,%d), "
"fixedSize=%d",
this,
int(temp.requested_w), int(temp.requested_h),
int(front.requested_w), int(front.requested_h),
isFixedSize());
if (!isFixedSize()) {
// we're being resized and there is a freeze display request,
// acquire a freeze lock, so that the screen stays put
// until we've redrawn at the new size; this is to avoid
// glitches upon orientation changes.
if (mFlinger->hasFreezeRequest()) {
// if the surface is hidden, don't try to acquire the
// freeze lock, since hidden surfaces may never redraw
if (!(front.flags & ISurfaceComposer::eLayerHidden)) {
mFreezeLock = mFlinger->getFreezeLock();
}
}
// this will make sure LayerBase::doTransaction doesn't update
// the drawing state's size
Layer::State& editDraw(mDrawingState);
editDraw.requested_w = temp.requested_w;
editDraw.requested_h = temp.requested_h;
// record the new size, form this point on, when the client request
// a buffer, it'll get the new size.
mSurfaceTexture->setDefaultBufferSize(temp.requested_w, temp.requested_h);
}
}
if (temp.sequence != front.sequence) {
if (temp.flags & ISurfaceComposer::eLayerHidden || temp.alpha == 0) {
// this surface is now hidden, so it shouldn't hold a freeze lock
// (it may never redraw, which is fine if it is hidden)
mFreezeLock.clear();
}
}
return LayerBase::doTransaction(flags);
}
bool Layer::isFixedSize() const {
Mutex::Autolock _l(mLock);
return mFixedSize;
}
void Layer::setFixedSize(bool fixedSize)
{
Mutex::Autolock _l(mLock);
mFixedSize = fixedSize;
}
bool Layer::isCropped() const {
return !mCurrentCrop.isEmpty();
}
// ----------------------------------------------------------------------------
// pageflip handling...
// ----------------------------------------------------------------------------
void Layer::lockPageFlip(bool& recomputeVisibleRegions)
{
if (android_atomic_and(0, &mQueuedFrames)) {
if (mSurfaceTexture->updateTexImage() < NO_ERROR) {
// something happened!
recomputeVisibleRegions = true;
return;
}
// signal another event if we have more frames waiting
if (mSurfaceTexture->getQueuedCount()) {
if (android_atomic_or(1, &mQueuedFrames) == 0) {
mFlinger->signalEvent();
}
}
mActiveBuffer = mSurfaceTexture->getCurrentBuffer();
mSurfaceTexture->getTransformMatrix(mTextureMatrix);
const Rect crop(mSurfaceTexture->getCurrentCrop());
const uint32_t transform(mSurfaceTexture->getCurrentTransform());
if ((crop != mCurrentCrop) || (transform != mCurrentTransform)) {
mCurrentCrop = crop;
mCurrentTransform = transform;
mFlinger->invalidateHwcGeometry();
}
const bool opacity(getOpacityForFormat(mActiveBuffer->format));
if (opacity != mCurrentOpacity) {
mCurrentOpacity = opacity;
recomputeVisibleRegions = true;
}
const GLenum target(mSurfaceTexture->getCurrentTextureTarget());
glTexParameterx(target, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameterx(target, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
// update the layer size and release freeze-lock
const Layer::State& front(drawingState());
// FIXME: mPostedDirtyRegion = dirty & bounds
mPostedDirtyRegion.set(front.w, front.h);
sp<GraphicBuffer> newFrontBuffer(mActiveBuffer);
if ((newFrontBuffer->getWidth() == front.requested_w &&
newFrontBuffer->getHeight() == front.requested_h) ||
isFixedSize())
{
if ((front.w != front.requested_w) ||
(front.h != front.requested_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
Layer::State& editDraw(mDrawingState);
editDraw.w = editDraw.requested_w;
editDraw.h = editDraw.requested_h;
// We also need to update the current state so that we don't
// end-up doing too much work during the next transaction.
// NOTE: We actually don't need hold the transaction lock here
// because State::w and State::h are only accessed from
// this thread
Layer::State& editTemp(currentState());
editTemp.w = editDraw.w;
editTemp.h = editDraw.h;
// recompute visible region
recomputeVisibleRegions = true;
}
// we now have the correct size, unfreeze the screen
mFreezeLock.clear();
}
}
}
void Layer::unlockPageFlip(
const Transform& planeTransform, Region& outDirtyRegion)
{
Region dirtyRegion(mPostedDirtyRegion);
if (!dirtyRegion.isEmpty()) {
mPostedDirtyRegion.clear();
// The dirty region is given in the layer's coordinate space
// transform the dirty region by the surface's transformation
// and the global transformation.
const Layer::State& s(drawingState());
const Transform tr(planeTransform * s.transform);
dirtyRegion = tr.transform(dirtyRegion);
// At this point, the dirty region is in screen space.
// Make sure it's constrained by the visible region (which
// is in screen space as well).
dirtyRegion.andSelf(visibleRegionScreen);
outDirtyRegion.orSelf(dirtyRegion);
}
if (visibleRegionScreen.isEmpty()) {
// an invisible layer should not hold a freeze-lock
// (because it may never be updated and therefore never release it)
mFreezeLock.clear();
}
}
void Layer::dump(String8& result, char* buffer, size_t SIZE) const
{
LayerBaseClient::dump(result, buffer, SIZE);
sp<const GraphicBuffer> buf0(mActiveBuffer);
uint32_t w0=0, h0=0, s0=0, f0=0;
if (buf0 != 0) {
w0 = buf0->getWidth();
h0 = buf0->getHeight();
s0 = buf0->getStride();
f0 = buf0->format;
}
snprintf(buffer, SIZE,
" "
"format=%2d, activeBuffer=[%3ux%3u:%3u,%3u],"
" freezeLock=%p, queued-frames=%d\n",
mFormat, w0, h0, s0,f0,
getFreezeLock().get(), mQueuedFrames);
result.append(buffer);
if (mSurfaceTexture != 0) {
mSurfaceTexture->dump(result, " ", buffer, SIZE);
}
}
uint32_t Layer::getEffectiveUsage(uint32_t usage) const
{
// TODO: should we do something special if mSecure is set?
if (mProtectedByApp) {
// need a hardware-protected path to external video sink
usage |= GraphicBuffer::USAGE_PROTECTED;
}
return usage;
}
// ---------------------------------------------------------------------------
}; // namespace android