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gecko/gfx/layers/client/TiledContentClient.cpp

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/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "mozilla/layers/TiledContentClient.h"
#include <math.h> // for ceil, ceilf, floor
#include <algorithm>
#include "ClientTiledPaintedLayer.h" // for ClientTiledPaintedLayer
#include "GeckoProfiler.h" // for PROFILER_LABEL
#include "ClientLayerManager.h" // for ClientLayerManager
#include "CompositorChild.h" // for CompositorChild
#include "gfxContext.h" // for gfxContext, etc
#include "gfxPlatform.h" // for gfxPlatform
#include "gfxPrefs.h" // for gfxPrefs
#include "gfxRect.h" // for gfxRect
#include "mozilla/MathAlgorithms.h" // for Abs
#include "mozilla/gfx/Point.h" // for IntSize
#include "mozilla/gfx/Rect.h" // for Rect
#include "mozilla/gfx/Tools.h" // for BytesPerPixel
#include "mozilla/layers/CompositableForwarder.h"
#include "mozilla/layers/LayerMetricsWrapper.h"
#include "mozilla/layers/ShadowLayers.h" // for ShadowLayerForwarder
#include "TextureClientPool.h"
#include "nsDebug.h" // for NS_ASSERTION
#include "nsISupportsImpl.h" // for gfxContext::AddRef, etc
#include "nsSize.h" // for nsIntSize
#include "gfxReusableSharedImageSurfaceWrapper.h"
#include "nsExpirationTracker.h" // for nsExpirationTracker
#include "nsMathUtils.h" // for NS_roundf
#include "gfx2DGlue.h"
#include "LayersLogging.h"
#include "UnitTransforms.h" // for TransformTo
#include "mozilla/UniquePtr.h"
// This is the minimum area that we deem reasonable to copy from the front buffer to the
// back buffer on tile updates. If the valid region is smaller than this, we just
// redraw it and save on the copy (and requisite surface-locking involved).
#define MINIMUM_TILE_COPY_AREA (1.f/16.f)
#ifdef GFX_TILEDLAYER_DEBUG_OVERLAY
#include "cairo.h"
#include <sstream>
using mozilla::layers::Layer;
static void DrawDebugOverlay(mozilla::gfx::DrawTarget* dt, int x, int y, int width, int height)
{
gfxContext c(dt);
// Draw border
c.NewPath();
c.SetDeviceColor(gfxRGBA(0.0, 0.0, 0.0, 1.0));
c.Rectangle(gfxRect(0, 0, width, height));
c.Stroke();
// Build tile description
std::stringstream ss;
ss << x << ", " << y;
// Draw text using cairo toy text API
cairo_t* cr = c.GetCairo();
cairo_set_font_size(cr, 25);
cairo_text_extents_t extents;
cairo_text_extents(cr, ss.str().c_str(), &extents);
int textWidth = extents.width + 6;
c.NewPath();
c.SetDeviceColor(gfxRGBA(0.0, 0.0, 0.0, 1.0));
c.Rectangle(gfxRect(gfxPoint(2,2),gfxSize(textWidth, 30)));
c.Fill();
c.NewPath();
c.SetDeviceColor(gfxRGBA(1.0, 0.0, 0.0, 1.0));
c.Rectangle(gfxRect(gfxPoint(2,2),gfxSize(textWidth, 30)));
c.Stroke();
c.NewPath();
cairo_move_to(cr, 4, 28);
cairo_show_text(cr, ss.str().c_str());
}
#endif
namespace mozilla {
using namespace gfx;
namespace layers {
TiledContentClient::TiledContentClient(ClientTiledPaintedLayer* aPaintedLayer,
ClientLayerManager* aManager)
: CompositableClient(aManager->AsShadowForwarder())
{
MOZ_COUNT_CTOR(TiledContentClient);
mTiledBuffer = ClientTiledLayerBuffer(aPaintedLayer, this, aManager,
&mSharedFrameMetricsHelper);
mLowPrecisionTiledBuffer = ClientTiledLayerBuffer(aPaintedLayer, this, aManager,
&mSharedFrameMetricsHelper);
mLowPrecisionTiledBuffer.SetResolution(gfxPrefs::LowPrecisionResolution());
}
void
TiledContentClient::ClearCachedResources()
{
mTiledBuffer.DiscardBuffers();
mLowPrecisionTiledBuffer.DiscardBuffers();
}
void
TiledContentClient::UseTiledLayerBuffer(TiledBufferType aType)
{
ClientTiledLayerBuffer* buffer = aType == LOW_PRECISION_TILED_BUFFER
? &mLowPrecisionTiledBuffer
: &mTiledBuffer;
// Take a ReadLock on behalf of the TiledContentHost. This
// reference will be adopted when the descriptor is opened in
// TiledLayerBufferComposite.
buffer->ReadLock();
mForwarder->UseTiledLayerBuffer(this, buffer->GetSurfaceDescriptorTiles());
buffer->ClearPaintedRegion();
}
SharedFrameMetricsHelper::SharedFrameMetricsHelper()
: mLastProgressiveUpdateWasLowPrecision(false)
, mProgressiveUpdateWasInDanger(false)
{
MOZ_COUNT_CTOR(SharedFrameMetricsHelper);
}
SharedFrameMetricsHelper::~SharedFrameMetricsHelper()
{
MOZ_COUNT_DTOR(SharedFrameMetricsHelper);
}
static inline bool
FuzzyEquals(float a, float b) {
return (fabsf(a - b) < 1e-6);
}
static ViewTransform
ComputeViewTransform(const FrameMetrics& aContentMetrics, const FrameMetrics& aCompositorMetrics)
{
// This is basically the same code as AsyncPanZoomController::GetCurrentAsyncTransform
// but with aContentMetrics used in place of mLastContentPaintMetrics, because they
// should be equivalent, modulo race conditions while transactions are inflight.
ParentLayerToScreenScale scale = aCompositorMetrics.GetZoom()
/ aContentMetrics.mDevPixelsPerCSSPixel
/ aCompositorMetrics.GetParentResolution();
ScreenPoint translation = (aCompositorMetrics.GetScrollOffset() - aContentMetrics.GetScrollOffset())
* aCompositorMetrics.GetZoom();
return ViewTransform(scale, -translation);
}
bool
SharedFrameMetricsHelper::UpdateFromCompositorFrameMetrics(
const LayerMetricsWrapper& aLayer,
bool aHasPendingNewThebesContent,
bool aLowPrecision,
ViewTransform& aViewTransform)
{
MOZ_ASSERT(aLayer);
CompositorChild* compositor = nullptr;
if (aLayer.Manager() &&
aLayer.Manager()->AsClientLayerManager()) {
compositor = aLayer.Manager()->AsClientLayerManager()->GetCompositorChild();
}
if (!compositor) {
return false;
}
const FrameMetrics& contentMetrics = aLayer.Metrics();
FrameMetrics compositorMetrics;
if (!compositor->LookupCompositorFrameMetrics(contentMetrics.GetScrollId(),
compositorMetrics)) {
return false;
}
aViewTransform = ComputeViewTransform(contentMetrics, compositorMetrics);
// Reset the checkerboard risk flag when switching to low precision
// rendering.
if (aLowPrecision && !mLastProgressiveUpdateWasLowPrecision) {
// Skip low precision rendering until we're at risk of checkerboarding.
if (!mProgressiveUpdateWasInDanger) {
TILING_LOG("TILING: Aborting low-precision rendering because not at risk of checkerboarding\n");
return true;
}
mProgressiveUpdateWasInDanger = false;
}
mLastProgressiveUpdateWasLowPrecision = aLowPrecision;
// Always abort updates if the resolution has changed. There's no use
// in drawing at the incorrect resolution.
if (!FuzzyEquals(compositorMetrics.GetZoom().scale, contentMetrics.GetZoom().scale)) {
TILING_LOG("TILING: Aborting because resolution changed from %f to %f\n",
contentMetrics.GetZoom().scale, compositorMetrics.GetZoom().scale);
return true;
}
// Never abort drawing if we can't be sure we've sent a more recent
// display-port. If we abort updating when we shouldn't, we can end up
// with blank regions on the screen and we open up the risk of entering
// an endless updating cycle.
if (fabsf(contentMetrics.GetScrollOffset().x - compositorMetrics.GetScrollOffset().x) <= 2 &&
fabsf(contentMetrics.GetScrollOffset().y - compositorMetrics.GetScrollOffset().y) <= 2 &&
fabsf(contentMetrics.mDisplayPort.x - compositorMetrics.mDisplayPort.x) <= 2 &&
fabsf(contentMetrics.mDisplayPort.y - compositorMetrics.mDisplayPort.y) <= 2 &&
fabsf(contentMetrics.mDisplayPort.width - compositorMetrics.mDisplayPort.width) <= 2 &&
fabsf(contentMetrics.mDisplayPort.height - compositorMetrics.mDisplayPort.height)) {
return false;
}
// When not a low precision pass and the page is in danger of checker boarding
// abort update.
if (!aLowPrecision && !mProgressiveUpdateWasInDanger) {
bool scrollUpdatePending = contentMetrics.GetScrollOffsetUpdated() &&
contentMetrics.GetScrollGeneration() != compositorMetrics.GetScrollGeneration();
// If scrollUpdatePending is true, then that means the content-side
// metrics has a new scroll offset that is going to be forced into the
// compositor but it hasn't gotten there yet.
// Even though right now comparing the metrics might indicate we're
// about to checkerboard (and that's true), the checkerboarding will
// disappear as soon as the new scroll offset update is processed
// on the compositor side. To avoid leaving things in a low-precision
// paint, we need to detect and handle this case (bug 1026756).
if (!scrollUpdatePending && AboutToCheckerboard(contentMetrics, compositorMetrics)) {
mProgressiveUpdateWasInDanger = true;
return true;
}
}
// Abort drawing stale low-precision content if there's a more recent
// display-port in the pipeline.
if (aLowPrecision && !aHasPendingNewThebesContent) {
TILING_LOG("TILING: Aborting low-precision because of new pending content\n");
return true;
}
return false;
}
bool
SharedFrameMetricsHelper::AboutToCheckerboard(const FrameMetrics& aContentMetrics,
const FrameMetrics& aCompositorMetrics)
{
// The size of the painted area is originally computed in layer pixels in layout, but then
// converted to app units and then back to CSS pixels before being put in the FrameMetrics.
// This process can introduce some rounding error, so we inflate the rect by one app unit
// to account for that.
CSSRect painted = (aContentMetrics.mCriticalDisplayPort.IsEmpty()
? aContentMetrics.mDisplayPort
: aContentMetrics.mCriticalDisplayPort)
+ aContentMetrics.GetScrollOffset();
painted.Inflate(CSSMargin::FromAppUnits(nsMargin(1, 1, 1, 1)));
// Inflate the rect by the danger zone. See the description of the danger zone prefs
// in AsyncPanZoomController.cpp for an explanation of this.
CSSRect showing = CSSRect(aCompositorMetrics.GetScrollOffset(),
aCompositorMetrics.CalculateBoundedCompositedSizeInCssPixels());
showing.Inflate(LayerSize(gfxPrefs::APZDangerZoneX(), gfxPrefs::APZDangerZoneY())
/ aCompositorMetrics.LayersPixelsPerCSSPixel());
// Clamp both rects to the scrollable rect, because having either of those
// exceed the scrollable rect doesn't make sense, and could lead to false
// positives.
painted = painted.Intersect(aContentMetrics.mScrollableRect);
showing = showing.Intersect(aContentMetrics.mScrollableRect);
if (!painted.Contains(showing)) {
TILING_LOG("TILING: About to checkerboard; content %s\n", Stringify(aContentMetrics).c_str());
TILING_LOG("TILING: About to checkerboard; painted %s\n", Stringify(painted).c_str());
TILING_LOG("TILING: About to checkerboard; compositor %s\n", Stringify(aCompositorMetrics).c_str());
TILING_LOG("TILING: About to checkerboard; showing %s\n", Stringify(showing).c_str());
return true;
}
return false;
}
ClientTiledLayerBuffer::ClientTiledLayerBuffer(ClientTiledPaintedLayer* aPaintedLayer,
CompositableClient* aCompositableClient,
ClientLayerManager* aManager,
SharedFrameMetricsHelper* aHelper)
: mPaintedLayer(aPaintedLayer)
, mCompositableClient(aCompositableClient)
, mManager(aManager)
, mLastPaintContentType(gfxContentType::COLOR)
, mLastPaintSurfaceMode(SurfaceMode::SURFACE_OPAQUE)
, mSharedFrameMetricsHelper(aHelper)
{
}
bool
ClientTiledLayerBuffer::HasFormatChanged() const
{
SurfaceMode mode;
gfxContentType content = GetContentType(&mode);
return content != mLastPaintContentType ||
mode != mLastPaintSurfaceMode;
}
gfxContentType
ClientTiledLayerBuffer::GetContentType(SurfaceMode* aMode) const
{
gfxContentType content =
mPaintedLayer->CanUseOpaqueSurface() ? gfxContentType::COLOR :
gfxContentType::COLOR_ALPHA;
SurfaceMode mode = mPaintedLayer->GetSurfaceMode();
if (mode == SurfaceMode::SURFACE_COMPONENT_ALPHA) {
#if defined(MOZ_GFX_OPTIMIZE_MOBILE) || defined(MOZ_WIDGET_GONK)
mode = SurfaceMode::SURFACE_SINGLE_CHANNEL_ALPHA;
}
#else
if (!mPaintedLayer->GetParent() ||
!mPaintedLayer->GetParent()->SupportsComponentAlphaChildren() ||
!gfxPrefs::TiledDrawTargetEnabled()) {
mode = SurfaceMode::SURFACE_SINGLE_CHANNEL_ALPHA;
} else {
content = gfxContentType::COLOR;
}
} else if (mode == SurfaceMode::SURFACE_OPAQUE) {
if (mPaintedLayer->MayResample()) {
mode = SurfaceMode::SURFACE_SINGLE_CHANNEL_ALPHA;
content = gfxContentType::COLOR_ALPHA;
}
}
#endif
if (aMode) {
*aMode = mode;
}
return content;
}
gfxMemorySharedReadLock::gfxMemorySharedReadLock()
: mReadCount(1)
{
MOZ_COUNT_CTOR(gfxMemorySharedReadLock);
}
gfxMemorySharedReadLock::~gfxMemorySharedReadLock()
{
MOZ_ASSERT(mReadCount == 0);
MOZ_COUNT_DTOR(gfxMemorySharedReadLock);
}
int32_t
gfxMemorySharedReadLock::ReadLock()
{
NS_ASSERT_OWNINGTHREAD(gfxMemorySharedReadLock);
return PR_ATOMIC_INCREMENT(&mReadCount);
}
int32_t
gfxMemorySharedReadLock::ReadUnlock()
{
int32_t readCount = PR_ATOMIC_DECREMENT(&mReadCount);
NS_ASSERTION(readCount >= 0, "ReadUnlock called without ReadLock.");
return readCount;
}
int32_t
gfxMemorySharedReadLock::GetReadCount()
{
NS_ASSERT_OWNINGTHREAD(gfxMemorySharedReadLock);
return mReadCount;
}
gfxShmSharedReadLock::gfxShmSharedReadLock(ISurfaceAllocator* aAllocator)
: mAllocator(aAllocator)
, mAllocSuccess(false)
{
MOZ_COUNT_CTOR(gfxShmSharedReadLock);
MOZ_ASSERT(mAllocator);
if (mAllocator) {
#define MOZ_ALIGN_WORD(x) (((x) + 3) & ~3)
if (mAllocator->AllocShmemSection(MOZ_ALIGN_WORD(sizeof(ShmReadLockInfo)), &mShmemSection)) {
ShmReadLockInfo* info = GetShmReadLockInfoPtr();
info->readCount = 1;
mAllocSuccess = true;
}
}
}
gfxShmSharedReadLock::~gfxShmSharedReadLock()
{
MOZ_COUNT_DTOR(gfxShmSharedReadLock);
}
int32_t
gfxShmSharedReadLock::ReadLock() {
NS_ASSERT_OWNINGTHREAD(gfxShmSharedReadLock);
if (!mAllocSuccess) {
return 0;
}
ShmReadLockInfo* info = GetShmReadLockInfoPtr();
return PR_ATOMIC_INCREMENT(&info->readCount);
}
int32_t
gfxShmSharedReadLock::ReadUnlock() {
if (!mAllocSuccess) {
return 0;
}
ShmReadLockInfo* info = GetShmReadLockInfoPtr();
int32_t readCount = PR_ATOMIC_DECREMENT(&info->readCount);
NS_ASSERTION(readCount >= 0, "ReadUnlock called without a ReadLock.");
if (readCount <= 0) {
mAllocator->FreeShmemSection(mShmemSection);
}
return readCount;
}
int32_t
gfxShmSharedReadLock::GetReadCount() {
NS_ASSERT_OWNINGTHREAD(gfxShmSharedReadLock);
if (!mAllocSuccess) {
return 0;
}
ShmReadLockInfo* info = GetShmReadLockInfoPtr();
return info->readCount;
}
class TileExpiry MOZ_FINAL : public nsExpirationTracker<TileClient, 3>
{
public:
TileExpiry() : nsExpirationTracker<TileClient, 3>(1000) {}
static void AddTile(TileClient* aTile)
{
if (!sTileExpiry) {
sTileExpiry = MakeUnique<TileExpiry>();
}
sTileExpiry->AddObject(aTile);
}
static void RemoveTile(TileClient* aTile)
{
MOZ_ASSERT(sTileExpiry);
sTileExpiry->RemoveObject(aTile);
}
static void Shutdown() {
sTileExpiry = nullptr;
}
private:
virtual void NotifyExpired(TileClient* aTile) MOZ_OVERRIDE
{
aTile->DiscardBackBuffer();
}
static UniquePtr<TileExpiry> sTileExpiry;
};
UniquePtr<TileExpiry> TileExpiry::sTileExpiry;
void ShutdownTileCache()
{
TileExpiry::Shutdown();
}
void
TileClient::PrivateProtector::Set(TileClient * const aContainer, RefPtr<TextureClient> aNewValue)
{
if (mBuffer) {
TileExpiry::RemoveTile(aContainer);
}
mBuffer = aNewValue;
if (mBuffer) {
TileExpiry::AddTile(aContainer);
}
}
void
TileClient::PrivateProtector::Set(TileClient * const aContainer, TextureClient* aNewValue)
{
Set(aContainer, RefPtr<TextureClient>(aNewValue));
}
// Placeholder
TileClient::TileClient()
: mCompositableClient(nullptr)
{
}
TileClient::~TileClient()
{
if (mExpirationState.IsTracked()) {
MOZ_ASSERT(mBackBuffer);
TileExpiry::RemoveTile(this);
}
}
TileClient::TileClient(const TileClient& o)
{
mBackBuffer.Set(this, o.mBackBuffer);
mBackBufferOnWhite = o.mBackBufferOnWhite;
mFrontBuffer = o.mFrontBuffer;
mFrontBufferOnWhite = o.mFrontBufferOnWhite;
mBackLock = o.mBackLock;
mFrontLock = o.mFrontLock;
mCompositableClient = o.mCompositableClient;
#ifdef GFX_TILEDLAYER_DEBUG_OVERLAY
mLastUpdate = o.mLastUpdate;
#endif
mManager = o.mManager;
mInvalidFront = o.mInvalidFront;
mInvalidBack = o.mInvalidBack;
}
TileClient&
TileClient::operator=(const TileClient& o)
{
if (this == &o) return *this;
mBackBuffer.Set(this, o.mBackBuffer);
mBackBufferOnWhite = o.mBackBufferOnWhite;
mFrontBuffer = o.mFrontBuffer;
mFrontBufferOnWhite = o.mFrontBufferOnWhite;
mBackLock = o.mBackLock;
mFrontLock = o.mFrontLock;
mCompositableClient = o.mCompositableClient;
#ifdef GFX_TILEDLAYER_DEBUG_OVERLAY
mLastUpdate = o.mLastUpdate;
#endif
mManager = o.mManager;
mInvalidFront = o.mInvalidFront;
mInvalidBack = o.mInvalidBack;
return *this;
}
void
TileClient::Flip()
{
#if defined(MOZ_WIDGET_GONK) && ANDROID_VERSION >= 17
if (mFrontBuffer && mFrontBuffer->GetIPDLActor() &&
mCompositableClient && mCompositableClient->GetIPDLActor()) {
// remove old buffer from CompositableHost
RefPtr<AsyncTransactionTracker> tracker = new RemoveTextureFromCompositableTracker();
// Hold TextureClient until transaction complete.
tracker->SetTextureClient(mFrontBuffer);
mFrontBuffer->SetRemoveFromCompositableTracker(tracker);
// RemoveTextureFromCompositableAsync() expects CompositorChild's presence.
mManager->AsShadowForwarder()->RemoveTextureFromCompositableAsync(tracker,
mCompositableClient,
mFrontBuffer);
}
#endif
RefPtr<TextureClient> frontBuffer = mFrontBuffer;
RefPtr<TextureClient> frontBufferOnWhite = mFrontBufferOnWhite;
mFrontBuffer = mBackBuffer;
mFrontBufferOnWhite = mBackBufferOnWhite;
mBackBuffer.Set(this, frontBuffer);
mBackBufferOnWhite = frontBufferOnWhite;
RefPtr<gfxSharedReadLock> frontLock = mFrontLock;
mFrontLock = mBackLock;
mBackLock = frontLock;
nsIntRegion invalidFront = mInvalidFront;
mInvalidFront = mInvalidBack;
mInvalidBack = invalidFront;
}
static bool
CopyFrontToBack(TextureClient* aFront,
TextureClient* aBack,
const gfx::IntRect& aRectToCopy)
{
if (!aFront->Lock(OpenMode::OPEN_READ)) {
NS_WARNING("Failed to lock the tile's front buffer");
return false;
}
if (!aBack->Lock(OpenMode::OPEN_WRITE)) {
NS_WARNING("Failed to lock the tile's back buffer");
return false;
}
gfx::IntPoint rectToCopyTopLeft = aRectToCopy.TopLeft();
aFront->CopyToTextureClient(aBack, &aRectToCopy, &rectToCopyTopLeft);
return true;
}
void
TileClient::ValidateBackBufferFromFront(const nsIntRegion& aDirtyRegion,
bool aCanRerasterizeValidRegion,
nsIntRegion& aAddPaintedRegion)
{
if (mBackBuffer && mFrontBuffer) {
gfx::IntSize tileSize = mFrontBuffer->GetSize();
const nsIntRect tileRect = nsIntRect(0, 0, tileSize.width, tileSize.height);
if (aDirtyRegion.Contains(tileRect)) {
// The dirty region means that we no longer need the front buffer, so
// discard it.
DiscardFrontBuffer();
} else {
// Region that needs copying.
nsIntRegion regionToCopy = mInvalidBack;
regionToCopy.Sub(regionToCopy, aDirtyRegion);
aAddPaintedRegion = regionToCopy;
if (regionToCopy.IsEmpty() ||
(aCanRerasterizeValidRegion &&
regionToCopy.Area() < tileSize.width * tileSize.height * MINIMUM_TILE_COPY_AREA)) {
// Just redraw it all.
return;
}
// Copy the bounding rect of regionToCopy. As tiles are quite small, it
// is unlikely that we'd save much by copying each individual rect of the
// region, but we can reevaluate this if it becomes an issue.
const nsIntRect rectToCopy = regionToCopy.GetBounds();
gfx::IntRect gfxRectToCopy(rectToCopy.x, rectToCopy.y, rectToCopy.width, rectToCopy.height);
CopyFrontToBack(mFrontBuffer, mBackBuffer, gfxRectToCopy);
if (mBackBufferOnWhite) {
MOZ_ASSERT(mFrontBufferOnWhite);
CopyFrontToBack(mFrontBufferOnWhite, mBackBufferOnWhite, gfxRectToCopy);
}
mInvalidBack.SetEmpty();
}
}
}
void
TileClient::DiscardFrontBuffer()
{
if (mFrontBuffer) {
MOZ_ASSERT(mFrontLock);
#if defined(MOZ_WIDGET_GONK) && ANDROID_VERSION >= 17
MOZ_ASSERT(!mFrontBufferOnWhite);
if (mFrontBuffer->GetIPDLActor() &&
mCompositableClient && mCompositableClient->GetIPDLActor()) {
// remove old buffer from CompositableHost
RefPtr<AsyncTransactionTracker> tracker = new RemoveTextureFromCompositableTracker();
// Hold TextureClient until transaction complete.
tracker->SetTextureClient(mFrontBuffer);
mFrontBuffer->SetRemoveFromCompositableTracker(tracker);
// RemoveTextureFromCompositableAsync() expects CompositorChild's presence.
mManager->AsShadowForwarder()->RemoveTextureFromCompositableAsync(tracker,
mCompositableClient,
mFrontBuffer);
}
#endif
mManager->ReturnTextureClientDeferred(*mFrontBuffer);
if (mFrontBufferOnWhite) {
mManager->ReturnTextureClientDeferred(*mFrontBufferOnWhite);
}
mFrontLock->ReadUnlock();
if (mFrontBuffer->IsLocked()) {
mFrontBuffer->Unlock();
}
if (mFrontBufferOnWhite && mFrontBufferOnWhite->IsLocked()) {
mFrontBufferOnWhite->Unlock();
}
mFrontBuffer = nullptr;
mFrontBufferOnWhite = nullptr;
mFrontLock = nullptr;
}
}
void
TileClient::DiscardBackBuffer()
{
if (mBackBuffer) {
MOZ_ASSERT(mBackLock);
if (!mBackBuffer->ImplementsLocking() && mBackLock->GetReadCount() > 1) {
// Our current back-buffer is still locked by the compositor. This can occur
// when the client is producing faster than the compositor can consume. In
// this case we just want to drop it and not return it to the pool.
mManager->ReportClientLost(*mBackBuffer);
if (mBackBufferOnWhite) {
mManager->ReportClientLost(*mBackBufferOnWhite);
}
} else {
mManager->ReturnTextureClient(*mBackBuffer);
if (mBackBufferOnWhite) {
mManager->ReturnTextureClient(*mBackBufferOnWhite);
}
}
mBackLock->ReadUnlock();
if (mBackBuffer->IsLocked()) {
mBackBuffer->Unlock();
}
if (mBackBufferOnWhite && mBackBufferOnWhite->IsLocked()) {
mBackBufferOnWhite->Unlock();
}
mBackBuffer.Set(this, nullptr);
mBackBufferOnWhite = nullptr;
mBackLock = nullptr;
}
}
TextureClient*
TileClient::GetBackBuffer(const nsIntRegion& aDirtyRegion,
gfxContentType aContent,
SurfaceMode aMode,
bool *aCreatedTextureClient,
nsIntRegion& aAddPaintedRegion,
bool aCanRerasterizeValidRegion,
RefPtr<TextureClient>* aBackBufferOnWhite)
{
// Try to re-use the front-buffer if possible
if (mFrontBuffer &&
mFrontBuffer->HasInternalBuffer() &&
mFrontLock->GetReadCount() == 1) {
// If we had a backbuffer we no longer care about it since we'll
// re-use the front buffer.
DiscardBackBuffer();
Flip();
*aBackBufferOnWhite = mBackBufferOnWhite;
return mBackBuffer;
}
if (!mBackBuffer ||
mBackLock->GetReadCount() > 1) {
if (mBackLock) {
// Before we Replacing the lock by another one we need to unlock it!
mBackLock->ReadUnlock();
}
if (mBackBuffer) {
// Our current back-buffer is still locked by the compositor. This can occur
// when the client is producing faster than the compositor can consume. In
// this case we just want to drop it and not return it to the pool.
mManager->ReportClientLost(*mBackBuffer);
}
if (mBackBufferOnWhite) {
mManager->ReportClientLost(*mBackBufferOnWhite);
mBackBufferOnWhite = nullptr;
}
TextureClientPool *pool =
mManager->GetTexturePool(gfxPlatform::GetPlatform()->Optimal2DFormatForContent(aContent));
mBackBuffer.Set(this, pool->GetTextureClient());
if (!mBackBuffer) {
return nullptr;
}
if (aMode == SurfaceMode::SURFACE_COMPONENT_ALPHA) {
mBackBufferOnWhite = pool->GetTextureClient();
if (!mBackBufferOnWhite) {
mBackBuffer.Set(this, nullptr);
return nullptr;
}
}
// Create a lock for our newly created back-buffer.
if (mManager->AsShadowForwarder()->IsSameProcess()) {
// If our compositor is in the same process, we can save some cycles by not
// using shared memory.
mBackLock = new gfxMemorySharedReadLock();
} else {
mBackLock = new gfxShmSharedReadLock(mManager->AsShadowForwarder());
}
MOZ_ASSERT(mBackLock->IsValid());
*aCreatedTextureClient = true;
mInvalidBack = nsIntRect(0, 0, mBackBuffer->GetSize().width, mBackBuffer->GetSize().height);
}
ValidateBackBufferFromFront(aDirtyRegion, aCanRerasterizeValidRegion, aAddPaintedRegion);
*aBackBufferOnWhite = mBackBufferOnWhite;
return mBackBuffer;
}
TileDescriptor
TileClient::GetTileDescriptor()
{
if (IsPlaceholderTile()) {
return PlaceholderTileDescriptor();
}
MOZ_ASSERT(mFrontLock);
if (mFrontLock->GetType() == gfxSharedReadLock::TYPE_MEMORY) {
// AddRef here and Release when receiving on the host side to make sure the
// reference count doesn't go to zero before the host receives the message.
// see TiledLayerBufferComposite::TiledLayerBufferComposite
mFrontLock->AddRef();
}
if (mFrontLock->GetType() == gfxSharedReadLock::TYPE_MEMORY) {
return TexturedTileDescriptor(nullptr, mFrontBuffer->GetIPDLActor(),
mFrontBufferOnWhite ? MaybeTexture(mFrontBufferOnWhite->GetIPDLActor()) : MaybeTexture(null_t()),
TileLock(uintptr_t(mFrontLock.get())));
} else {
gfxShmSharedReadLock *lock = static_cast<gfxShmSharedReadLock*>(mFrontLock.get());
return TexturedTileDescriptor(nullptr, mFrontBuffer->GetIPDLActor(),
mFrontBufferOnWhite ? MaybeTexture(mFrontBufferOnWhite->GetIPDLActor()) : MaybeTexture(null_t()),
TileLock(lock->GetShmemSection()));
}
}
void
ClientTiledLayerBuffer::ReadUnlock() {
for (size_t i = 0; i < mRetainedTiles.Length(); i++) {
if (mRetainedTiles[i].IsPlaceholderTile()) continue;
mRetainedTiles[i].ReadUnlock();
}
}
void
ClientTiledLayerBuffer::ReadLock() {
for (size_t i = 0; i < mRetainedTiles.Length(); i++) {
if (mRetainedTiles[i].IsPlaceholderTile()) continue;
mRetainedTiles[i].ReadLock();
}
}
void
ClientTiledLayerBuffer::Release()
{
for (size_t i = 0; i < mRetainedTiles.Length(); i++) {
if (mRetainedTiles[i].IsPlaceholderTile()) continue;
mRetainedTiles[i].Release();
}
}
void
ClientTiledLayerBuffer::DiscardBuffers()
{
for (size_t i = 0; i < mRetainedTiles.Length(); i++) {
if (mRetainedTiles[i].IsPlaceholderTile()) continue;
mRetainedTiles[i].DiscardFrontBuffer();
mRetainedTiles[i].DiscardBackBuffer();
}
}
SurfaceDescriptorTiles
ClientTiledLayerBuffer::GetSurfaceDescriptorTiles()
{
InfallibleTArray<TileDescriptor> tiles;
for (size_t i = 0; i < mRetainedTiles.Length(); i++) {
TileDescriptor tileDesc;
if (mRetainedTiles.SafeElementAt(i, GetPlaceholderTile()) == GetPlaceholderTile()) {
tileDesc = PlaceholderTileDescriptor();
} else {
tileDesc = mRetainedTiles[i].GetTileDescriptor();
}
tiles.AppendElement(tileDesc);
}
return SurfaceDescriptorTiles(mValidRegion, mPaintedRegion,
tiles, mRetainedWidth, mRetainedHeight,
mResolution, mFrameResolution.scale);
}
void
ClientTiledLayerBuffer::PaintThebes(const nsIntRegion& aNewValidRegion,
const nsIntRegion& aPaintRegion,
LayerManager::DrawPaintedLayerCallback aCallback,
void* aCallbackData)
{
TILING_LOG("TILING %p: PaintThebes painting region %s\n", mPaintedLayer, Stringify(aPaintRegion).c_str());
TILING_LOG("TILING %p: PaintThebes new valid region %s\n", mPaintedLayer, Stringify(aNewValidRegion).c_str());
mCallback = aCallback;
mCallbackData = aCallbackData;
#ifdef GFX_TILEDLAYER_PREF_WARNINGS
long start = PR_IntervalNow();
#endif
// If this region is empty XMost() - 1 will give us a negative value.
NS_ASSERTION(!aPaintRegion.GetBounds().IsEmpty(), "Empty paint region\n");
bool useSinglePaintBuffer = UseSinglePaintBuffer();
// XXX The single-tile case doesn't work at the moment, see bug 850396
/*
if (useSinglePaintBuffer) {
// Check if the paint only spans a single tile. If that's
// the case there's no point in using a single paint buffer.
nsIntRect paintBounds = aPaintRegion.GetBounds();
useSinglePaintBuffer = GetTileStart(paintBounds.x) !=
GetTileStart(paintBounds.XMost() - 1) ||
GetTileStart(paintBounds.y) !=
GetTileStart(paintBounds.YMost() - 1);
}
*/
if (useSinglePaintBuffer && !gfxPrefs::TiledDrawTargetEnabled()) {
nsRefPtr<gfxContext> ctxt;
const nsIntRect bounds = aPaintRegion.GetBounds();
{
PROFILER_LABEL("ClientTiledLayerBuffer", "PaintThebesSingleBufferAlloc",
js::ProfileEntry::Category::GRAPHICS);
gfxImageFormat format =
gfxPlatform::GetPlatform()->OptimalFormatForContent(
GetContentType());
mSinglePaintDrawTarget =
gfxPlatform::GetPlatform()->CreateOffscreenContentDrawTarget(
gfx::IntSize(ceilf(bounds.width * mResolution),
ceilf(bounds.height * mResolution)),
gfx::ImageFormatToSurfaceFormat(format));
if (!mSinglePaintDrawTarget) {
return;
}
ctxt = new gfxContext(mSinglePaintDrawTarget);
mSinglePaintBufferOffset = nsIntPoint(bounds.x, bounds.y);
}
ctxt->NewPath();
ctxt->SetMatrix(
ctxt->CurrentMatrix().Scale(mResolution, mResolution).
Translate(-bounds.x, -bounds.y));
#ifdef GFX_TILEDLAYER_PREF_WARNINGS
if (PR_IntervalNow() - start > 3) {
printf_stderr("Slow alloc %i\n", PR_IntervalNow() - start);
}
start = PR_IntervalNow();
#endif
PROFILER_LABEL("ClientTiledLayerBuffer", "PaintThebesSingleBufferDraw",
js::ProfileEntry::Category::GRAPHICS);
mCallback(mPaintedLayer, ctxt, aPaintRegion, DrawRegionClip::NONE, nsIntRegion(), mCallbackData);
}
#ifdef GFX_TILEDLAYER_PREF_WARNINGS
if (PR_IntervalNow() - start > 30) {
const nsIntRect bounds = aPaintRegion.GetBounds();
printf_stderr("Time to draw %i: %i, %i, %i, %i\n", PR_IntervalNow() - start, bounds.x, bounds.y, bounds.width, bounds.height);
if (aPaintRegion.IsComplex()) {
printf_stderr("Complex region\n");
nsIntRegionRectIterator it(aPaintRegion);
for (const nsIntRect* rect = it.Next(); rect != nullptr; rect = it.Next()) {
printf_stderr(" rect %i, %i, %i, %i\n", rect->x, rect->y, rect->width, rect->height);
}
}
}
start = PR_IntervalNow();
#endif
PROFILER_LABEL("ClientTiledLayerBuffer", "PaintThebesUpdate",
js::ProfileEntry::Category::GRAPHICS);
mNewValidRegion = aNewValidRegion;
Update(aNewValidRegion, aPaintRegion);
#ifdef GFX_TILEDLAYER_PREF_WARNINGS
if (PR_IntervalNow() - start > 10) {
const nsIntRect bounds = aPaintRegion.GetBounds();
printf_stderr("Time to tile %i: %i, %i, %i, %i\n", PR_IntervalNow() - start, bounds.x, bounds.y, bounds.width, bounds.height);
}
#endif
mLastPaintContentType = GetContentType(&mLastPaintSurfaceMode);
mCallback = nullptr;
mCallbackData = nullptr;
mSinglePaintDrawTarget = nullptr;
}
void PadDrawTargetOutFromRegion(RefPtr<DrawTarget> drawTarget, nsIntRegion &region)
{
struct LockedBits {
uint8_t *data;
IntSize size;
int32_t stride;
SurfaceFormat format;
static int clamp(int x, int min, int max)
{
if (x < min)
x = min;
if (x > max)
x = max;
return x;
}
static void visitor(void *closure, VisitSide side, int x1, int y1, int x2, int y2) {
LockedBits *lb = static_cast<LockedBits*>(closure);
uint8_t *bitmap = lb->data;
const int bpp = gfx::BytesPerPixel(lb->format);
const int stride = lb->stride;
const int width = lb->size.width;
const int height = lb->size.height;
if (side == VisitSide::TOP) {
if (y1 > 0) {
x1 = clamp(x1, 0, width - 1);
x2 = clamp(x2, 0, width - 1);
memcpy(&bitmap[x1*bpp + (y1-1) * stride], &bitmap[x1*bpp + y1 * stride], (x2 - x1) * bpp);
}
} else if (side == VisitSide::BOTTOM) {
if (y1 < height) {
x1 = clamp(x1, 0, width - 1);
x2 = clamp(x2, 0, width - 1);
memcpy(&bitmap[x1*bpp + y1 * stride], &bitmap[x1*bpp + (y1-1) * stride], (x2 - x1) * bpp);
}
} else if (side == VisitSide::LEFT) {
if (x1 > 0) {
while (y1 != y2) {
memcpy(&bitmap[(x1-1)*bpp + y1 * stride], &bitmap[x1*bpp + y1*stride], bpp);
y1++;
}
}
} else if (side == VisitSide::RIGHT) {
if (x1 < width) {
while (y1 != y2) {
memcpy(&bitmap[x1*bpp + y1 * stride], &bitmap[(x1-1)*bpp + y1*stride], bpp);
y1++;
}
}
}
}
} lb;
if (drawTarget->LockBits(&lb.data, &lb.size, &lb.stride, &lb.format)) {
// we can only pad software targets so if we can't lock the bits don't pad
region.VisitEdges(lb.visitor, &lb);
drawTarget->ReleaseBits(lb.data);
}
}
void
ClientTiledLayerBuffer::PostValidate(const nsIntRegion& aPaintRegion)
{
if (gfxPrefs::TiledDrawTargetEnabled() && mMoz2DTiles.size() > 0) {
gfx::TileSet tileset;
tileset.mTiles = &mMoz2DTiles[0];
tileset.mTileCount = mMoz2DTiles.size();
RefPtr<DrawTarget> drawTarget = gfx::Factory::CreateTiledDrawTarget(tileset);
drawTarget->SetTransform(Matrix());
RefPtr<gfxContext> ctx = new gfxContext(drawTarget);
ctx->SetMatrix(
ctx->CurrentMatrix().Scale(mResolution, mResolution));
mCallback(mPaintedLayer, ctx, aPaintRegion, DrawRegionClip::DRAW, nsIntRegion(), mCallbackData);
mMoz2DTiles.clear();
}
}
void
ClientTiledLayerBuffer::UnlockTile(TileClient aTile)
{
// We locked the back buffer, and flipped so we now need to unlock the front
if (aTile.mFrontBuffer && aTile.mFrontBuffer->IsLocked()) {
aTile.mFrontBuffer->Unlock();
}
if (aTile.mFrontBufferOnWhite && aTile.mFrontBufferOnWhite->IsLocked()) {
aTile.mFrontBufferOnWhite->Unlock();
}
if (aTile.mBackBuffer && aTile.mBackBuffer->IsLocked()) {
aTile.mBackBuffer->Unlock();
}
if (aTile.mBackBufferOnWhite && aTile.mBackBufferOnWhite->IsLocked()) {
aTile.mBackBufferOnWhite->Unlock();
}
}
TileClient
ClientTiledLayerBuffer::ValidateTile(TileClient aTile,
const nsIntPoint& aTileOrigin,
const nsIntRegion& aDirtyRegion)
{
PROFILER_LABEL("ClientTiledLayerBuffer", "ValidateTile",
js::ProfileEntry::Category::GRAPHICS);
#ifdef GFX_TILEDLAYER_PREF_WARNINGS
if (aDirtyRegion.IsComplex()) {
printf_stderr("Complex region\n");
}
#endif
if (aTile.IsPlaceholderTile()) {
aTile.SetLayerManager(mManager);
}
aTile.SetCompositableClient(mCompositableClient);
bool createdTextureClient = false;
nsIntRegion offsetScaledDirtyRegion = aDirtyRegion.MovedBy(-aTileOrigin);
offsetScaledDirtyRegion.ScaleRoundOut(mResolution, mResolution);
bool usingSinglePaintBuffer = !!mSinglePaintDrawTarget;
SurfaceMode mode;
gfxContentType content = GetContentType(&mode);
nsIntRegion extraPainted;
RefPtr<TextureClient> backBufferOnWhite;
RefPtr<TextureClient> backBuffer =
aTile.GetBackBuffer(offsetScaledDirtyRegion,
content, mode,
&createdTextureClient, extraPainted,
!usingSinglePaintBuffer && !gfxPrefs::TiledDrawTargetEnabled(),
&backBufferOnWhite);
extraPainted.MoveBy(aTileOrigin);
extraPainted.And(extraPainted, mNewValidRegion);
mPaintedRegion.Or(mPaintedRegion, extraPainted);
if (!backBuffer) {
NS_WARNING("Failed to allocate a tile TextureClient");
aTile.DiscardBackBuffer();
aTile.DiscardFrontBuffer();
return TileClient();
}
// the back buffer may have been already locked in ValidateBackBufferFromFront
if (!backBuffer->IsLocked()) {
if (!backBuffer->Lock(OpenMode::OPEN_READ_WRITE)) {
NS_WARNING("Failed to lock a tile TextureClient");
aTile.DiscardBackBuffer();
aTile.DiscardFrontBuffer();
return TileClient();
}
}
if (backBufferOnWhite && !backBufferOnWhite->IsLocked()) {
if (!backBufferOnWhite->Lock(OpenMode::OPEN_READ_WRITE)) {
NS_WARNING("Failed to lock tile TextureClient for updating.");
aTile.DiscardBackBuffer();
aTile.DiscardFrontBuffer();
return TileClient();
}
}
if (gfxPrefs::TiledDrawTargetEnabled()) {
aTile.Flip();
if (createdTextureClient) {
if (!mCompositableClient->AddTextureClient(backBuffer)) {
NS_WARNING("Failed to add tile TextureClient.");
aTile.DiscardFrontBuffer();
aTile.DiscardBackBuffer();
return aTile;
}
if (backBufferOnWhite && !mCompositableClient->AddTextureClient(backBufferOnWhite)) {
NS_WARNING("Failed to add tile TextureClient.");
aTile.DiscardFrontBuffer();
aTile.DiscardBackBuffer();
return aTile;
}
}
// prepare an array of Moz2D tiles that will be painted into in PostValidate
gfx::Tile moz2DTile;
RefPtr<DrawTarget> dt = backBuffer->BorrowDrawTarget();
RefPtr<DrawTarget> dtOnWhite;
if (backBufferOnWhite) {
dtOnWhite = backBufferOnWhite->BorrowDrawTarget();
moz2DTile.mDrawTarget = Factory::CreateDualDrawTarget(dt, dtOnWhite);
} else {
moz2DTile.mDrawTarget = dt;
}
moz2DTile.mTileOrigin = gfx::IntPoint(aTileOrigin.x * mResolution, aTileOrigin.y * mResolution);
if (!dt || (backBufferOnWhite && !dtOnWhite)) {
aTile.DiscardFrontBuffer();
return aTile;
}
mMoz2DTiles.push_back(moz2DTile);
nsIntRegionRectIterator it(aDirtyRegion);
for (const nsIntRect* dirtyRect = it.Next(); dirtyRect != nullptr; dirtyRect = it.Next()) {
gfx::Rect drawRect(dirtyRect->x - aTileOrigin.x,
dirtyRect->y - aTileOrigin.y,
dirtyRect->width,
dirtyRect->height);
drawRect.Scale(mResolution);
gfx::IntRect copyRect(NS_roundf((dirtyRect->x - mSinglePaintBufferOffset.x) * mResolution),
NS_roundf((dirtyRect->y - mSinglePaintBufferOffset.y) * mResolution),
drawRect.width,
drawRect.height);
gfx::IntPoint copyTarget(NS_roundf(drawRect.x), NS_roundf(drawRect.y));
// Mark the newly updated area as invalid in the back buffer
aTile.mInvalidBack.Or(aTile.mInvalidBack, nsIntRect(copyTarget.x, copyTarget.y, copyRect.width, copyRect.height));
if (mode == SurfaceMode::SURFACE_COMPONENT_ALPHA) {
dt->FillRect(drawRect, ColorPattern(Color(0.0, 0.0, 0.0, 1.0)));
dtOnWhite->FillRect(drawRect, ColorPattern(Color(1.0, 1.0, 1.0, 1.0)));
} else if (content == gfxContentType::COLOR_ALPHA) {
dt->ClearRect(drawRect);
}
}
return aTile;
} else {
MOZ_ASSERT(!backBufferOnWhite, "Component alpha only supported with TiledDrawTarget");
}
// We must not keep a reference to the DrawTarget after it has been unlocked,
// make sure these are null'd before unlocking as destruction of the context
// may cause the target to be flushed.
RefPtr<DrawTarget> drawTarget = backBuffer->BorrowDrawTarget();
drawTarget->SetTransform(Matrix());
RefPtr<gfxContext> ctxt = new gfxContext(drawTarget);
if (usingSinglePaintBuffer) {
// XXX Perhaps we should just copy the bounding rectangle here?
RefPtr<gfx::SourceSurface> source = mSinglePaintDrawTarget->Snapshot();
nsIntRegionRectIterator it(aDirtyRegion);
for (const nsIntRect* dirtyRect = it.Next(); dirtyRect != nullptr; dirtyRect = it.Next()) {
#ifdef GFX_TILEDLAYER_PREF_WARNINGS
printf_stderr(" break into subdirtyRect %i, %i, %i, %i\n",
dirtyRect->x, dirtyRect->y, dirtyRect->width, dirtyRect->height);
#endif
gfx::Rect drawRect(dirtyRect->x - aTileOrigin.x,
dirtyRect->y - aTileOrigin.y,
dirtyRect->width,
dirtyRect->height);
drawRect.Scale(mResolution);
gfx::IntRect copyRect(NS_roundf((dirtyRect->x - mSinglePaintBufferOffset.x) * mResolution),
NS_roundf((dirtyRect->y - mSinglePaintBufferOffset.y) * mResolution),
drawRect.width,
drawRect.height);
gfx::IntPoint copyTarget(NS_roundf(drawRect.x), NS_roundf(drawRect.y));
drawTarget->CopySurface(source, copyRect, copyTarget);
// Mark the newly updated area as invalid in the front buffer
aTile.mInvalidFront.Or(aTile.mInvalidFront, nsIntRect(copyTarget.x, copyTarget.y, copyRect.width, copyRect.height));
}
// only worry about padding when not doing low-res
// because it simplifies the math and the artifacts
// won't be noticable
if (mResolution == 1) {
nsIntRect unscaledTile = nsIntRect(aTileOrigin.x,
aTileOrigin.y,
GetTileSize().width,
GetTileSize().height);
nsIntRegion tileValidRegion = GetValidRegion();
tileValidRegion.Or(tileValidRegion, aDirtyRegion);
// We only need to pad out if the tile has area that's not valid
if (!tileValidRegion.Contains(unscaledTile)) {
tileValidRegion = tileValidRegion.Intersect(unscaledTile);
// translate the region into tile space and pad
tileValidRegion.MoveBy(-nsIntPoint(unscaledTile.x, unscaledTile.y));
PadDrawTargetOutFromRegion(drawTarget, tileValidRegion);
}
}
// The new buffer is now validated, remove the dirty region from it.
aTile.mInvalidBack.Sub(nsIntRect(0, 0, GetTileSize().width, GetTileSize().height),
offsetScaledDirtyRegion);
} else {
// Area of the full tile...
nsIntRegion tileRegion =
nsIntRect(aTileOrigin.x, aTileOrigin.y,
GetScaledTileSize().width, GetScaledTileSize().height);
// Intersect this area with the portion that's dirty.
tileRegion = tileRegion.Intersect(aDirtyRegion);
// Add the resolution scale to store the dirty region.
nsIntPoint unscaledTileOrigin = nsIntPoint(aTileOrigin.x * mResolution,
aTileOrigin.y * mResolution);
nsIntRegion unscaledTileRegion(tileRegion);
unscaledTileRegion.ScaleRoundOut(mResolution, mResolution);
// Move invalid areas into scaled layer space.
aTile.mInvalidFront.MoveBy(unscaledTileOrigin);
aTile.mInvalidBack.MoveBy(unscaledTileOrigin);
// Add the area that's going to be redrawn to the invalid area of the
// front region.
aTile.mInvalidFront.Or(aTile.mInvalidFront, unscaledTileRegion);
// Add invalid areas of the backbuffer to the area to redraw.
tileRegion.Or(tileRegion, aTile.mInvalidBack);
// Move invalid areas back into tile space.
aTile.mInvalidFront.MoveBy(-unscaledTileOrigin);
// This will be validated now.
aTile.mInvalidBack.SetEmpty();
nsIntRect bounds = tileRegion.GetBounds();
bounds.MoveBy(-aTileOrigin);
if (GetContentType() != gfxContentType::COLOR) {
drawTarget->ClearRect(Rect(bounds.x, bounds.y, bounds.width, bounds.height));
}
ctxt->NewPath();
ctxt->Clip(gfxRect(bounds.x, bounds.y, bounds.width, bounds.height));
ctxt->SetMatrix(
ctxt->CurrentMatrix().Translate(-unscaledTileOrigin.x,
-unscaledTileOrigin.y).
Scale(mResolution, mResolution));
mCallback(mPaintedLayer, ctxt,
tileRegion.GetBounds(),
DrawRegionClip::NONE,
nsIntRegion(), mCallbackData);
}
#ifdef GFX_TILEDLAYER_DEBUG_OVERLAY
DrawDebugOverlay(drawTarget, aTileOrigin.x * mResolution,
aTileOrigin.y * mResolution, GetTileLength(), GetTileLength());
#endif
ctxt = nullptr;
drawTarget = nullptr;
nsIntRegion tileRegion =
nsIntRect(aTileOrigin.x, aTileOrigin.y,
GetScaledTileSize().width, GetScaledTileSize().height);
// Intersect this area with the portion that's invalid.
tileRegion = tileRegion.Sub(tileRegion, GetValidRegion());
tileRegion = tileRegion.Sub(tileRegion, aDirtyRegion); // Has now been validated
backBuffer->SetWaste(tileRegion.Area() * mResolution * mResolution);
backBuffer->Unlock();
if (createdTextureClient) {
if (!mCompositableClient->AddTextureClient(backBuffer)) {
NS_WARNING("Failed to add tile TextureClient.");
aTile.DiscardFrontBuffer();
aTile.DiscardBackBuffer();
return aTile;
}
}
aTile.Flip();
// Note, we don't call UpdatedTexture. The Updated function is called manually
// by the TiledContentHost before composition.
if (backBuffer->HasInternalBuffer()) {
// If our new buffer has an internal buffer, we don't want to keep another
// TextureClient around unnecessarily, so discard the back-buffer.
aTile.DiscardBackBuffer();
}
return aTile;
}
/**
* This function takes the transform stored in aTransformToCompBounds
* (which was generated in GetTransformToAncestorsParentLayer), and
* modifies it with the ViewTransform from the compositor side so that
* it reflects what the compositor is actually rendering. This operation
* basically replaces the nontransient async transform that was injected
* in GetTransformToAncestorsParentLayer with the complete async transform.
* This function then returns the scroll ancestor's composition bounds,
* transformed into the painted layer's LayerPixel coordinates, accounting
* for the compositor state.
*/
static LayerRect
GetCompositorSideCompositionBounds(const LayerMetricsWrapper& aScrollAncestor,
const Matrix4x4& aTransformToCompBounds,
const ViewTransform& aAPZTransform)
{
Matrix4x4 nonTransientAPZUntransform = Matrix4x4().Scale(
aScrollAncestor.Metrics().mResolution.scale,
aScrollAncestor.Metrics().mResolution.scale,
1.f);
nonTransientAPZUntransform.Invert();
// Take off the last "term" of aTransformToCompBounds, which
// is the APZ's nontransient async transform. Replace it with
// the APZ's async transform (this includes the nontransient
// component as well).
Matrix4x4 transform = aTransformToCompBounds
* nonTransientAPZUntransform
* Matrix4x4(aAPZTransform);
transform.Invert();
return TransformTo<LayerPixel>(transform,
aScrollAncestor.Metrics().mCompositionBounds);
}
bool
ClientTiledLayerBuffer::ComputeProgressiveUpdateRegion(const nsIntRegion& aInvalidRegion,
const nsIntRegion& aOldValidRegion,
nsIntRegion& aRegionToPaint,
BasicTiledLayerPaintData* aPaintData,
bool aIsRepeated)
{
aRegionToPaint = aInvalidRegion;
// If the composition bounds rect is empty, we can't make any sensible
// decision about how to update coherently. In this case, just update
// everything in one transaction.
if (aPaintData->mCompositionBounds.IsEmpty()) {
aPaintData->mPaintFinished = true;
return false;
}
// If this is a low precision buffer, we force progressive updates. The
// assumption is that the contents is less important, so visual coherency
// is lower priority than speed.
bool drawingLowPrecision = IsLowPrecision();
// Find out if we have any non-stale content to update.
nsIntRegion staleRegion;
staleRegion.And(aInvalidRegion, aOldValidRegion);
TILING_LOG("TILING %p: Progressive update stale region %s\n", mPaintedLayer, Stringify(staleRegion).c_str());
LayerMetricsWrapper scrollAncestor;
mPaintedLayer->GetAncestorLayers(&scrollAncestor, nullptr);
// Find out the current view transform to determine which tiles to draw
// first, and see if we should just abort this paint. Aborting is usually
// caused by there being an incoming, more relevant paint.
ViewTransform viewTransform;
#if defined(MOZ_WIDGET_ANDROID) && !defined(MOZ_ANDROID_APZ)
FrameMetrics contentMetrics = scrollAncestor.Metrics();
bool abortPaint = false;
// On Android, only the primary scrollable layer is async-scrolled, and the only one
// that the Java-side code can provide details about. If we're tiling some other layer
// then we already have all the information we need about it.
if (contentMetrics.GetScrollId() == mManager->GetRootScrollableLayerId()) {
FrameMetrics compositorMetrics = contentMetrics;
// The ProgressiveUpdateCallback updates the compositorMetrics
abortPaint = mManager->ProgressiveUpdateCallback(!staleRegion.Contains(aInvalidRegion),
compositorMetrics,
!drawingLowPrecision);
viewTransform = ComputeViewTransform(contentMetrics, compositorMetrics);
}
#else
MOZ_ASSERT(mSharedFrameMetricsHelper);
bool abortPaint =
mSharedFrameMetricsHelper->UpdateFromCompositorFrameMetrics(
scrollAncestor,
!staleRegion.Contains(aInvalidRegion),
drawingLowPrecision,
viewTransform);
#endif
TILING_LOG("TILING %p: Progressive update view transform %s zoom %f abort %d\n",
mPaintedLayer, ToString(viewTransform.mTranslation).c_str(), viewTransform.mScale.scale, abortPaint);
if (abortPaint) {
// We ignore if front-end wants to abort if this is the first,
// non-low-precision paint, as in that situation, we're about to override
// front-end's page/viewport metrics.
if (!aPaintData->mFirstPaint || drawingLowPrecision) {
PROFILER_LABEL("ClientTiledLayerBuffer", "ComputeProgressiveUpdateRegion",
js::ProfileEntry::Category::GRAPHICS);
aRegionToPaint.SetEmpty();
return aIsRepeated;
}
}
LayerRect transformedCompositionBounds =
GetCompositorSideCompositionBounds(scrollAncestor,
aPaintData->mTransformToCompBounds,
viewTransform);
TILING_LOG("TILING %p: Progressive update transformed compositor bounds %s\n", mPaintedLayer, Stringify(transformedCompositionBounds).c_str());
// Compute a "coherent update rect" that we should paint all at once in a
// single transaction. This is to avoid rendering glitches on animated
// page content, and when layers change size/shape.
// On Fennec uploads are more expensive because we're not using gralloc, so
// we use a coherent update rect that is intersected with the screen at the
// time of issuing the draw command. This will paint faster but also potentially
// make the progressive paint more visible to the user while scrolling.
// On B2G uploads are cheaper and we value coherency more, especially outside
// the browser, so we always use the entire user-visible area.
nsIntRect coherentUpdateRect(LayerIntRect::ToUntyped(RoundedOut(
#ifdef MOZ_WIDGET_ANDROID
transformedCompositionBounds.Intersect(aPaintData->mCompositionBounds)
#else
transformedCompositionBounds
#endif
)));
TILING_LOG("TILING %p: Progressive update final coherency rect %s\n", mPaintedLayer, Stringify(coherentUpdateRect).c_str());
aRegionToPaint.And(aInvalidRegion, coherentUpdateRect);
aRegionToPaint.Or(aRegionToPaint, staleRegion);
bool drawingStale = !aRegionToPaint.IsEmpty();
if (!drawingStale) {
aRegionToPaint = aInvalidRegion;
}
// Prioritise tiles that are currently visible on the screen.
bool paintingVisible = false;
if (aRegionToPaint.Intersects(coherentUpdateRect)) {
aRegionToPaint.And(aRegionToPaint, coherentUpdateRect);
paintingVisible = true;
}
TILING_LOG("TILING %p: Progressive update final paint region %s\n", mPaintedLayer, Stringify(aRegionToPaint).c_str());
// Paint area that's visible and overlaps previously valid content to avoid
// visible glitches in animated elements, such as gifs.
bool paintInSingleTransaction = paintingVisible && (drawingStale || aPaintData->mFirstPaint);
TILING_LOG("TILING %p: paintingVisible %d drawingStale %d firstPaint %d singleTransaction %d\n",
mPaintedLayer, paintingVisible, drawingStale, aPaintData->mFirstPaint, paintInSingleTransaction);
// The following code decides what order to draw tiles in, based on the
// current scroll direction of the primary scrollable layer.
NS_ASSERTION(!aRegionToPaint.IsEmpty(), "Unexpectedly empty paint region!");
nsIntRect paintBounds = aRegionToPaint.GetBounds();
int startX, incX, startY, incY;
gfx::IntSize scaledTileSize = GetScaledTileSize();
if (aPaintData->mScrollOffset.x >= aPaintData->mLastScrollOffset.x) {
startX = RoundDownToTileEdge(paintBounds.x, scaledTileSize.width);
incX = scaledTileSize.width;
} else {
startX = RoundDownToTileEdge(paintBounds.XMost() - 1, scaledTileSize.width);
incX = -scaledTileSize.width;
}
if (aPaintData->mScrollOffset.y >= aPaintData->mLastScrollOffset.y) {
startY = RoundDownToTileEdge(paintBounds.y, scaledTileSize.height);
incY = scaledTileSize.height;
} else {
startY = RoundDownToTileEdge(paintBounds.YMost() - 1, scaledTileSize.height);
incY = -scaledTileSize.height;
}
// Find a tile to draw.
nsIntRect tileBounds(startX, startY, scaledTileSize.width, scaledTileSize.height);
int32_t scrollDiffX = aPaintData->mScrollOffset.x - aPaintData->mLastScrollOffset.x;
int32_t scrollDiffY = aPaintData->mScrollOffset.y - aPaintData->mLastScrollOffset.y;
// This loop will always terminate, as there is at least one tile area
// along the first/last row/column intersecting with regionToPaint, or its
// bounds would have been smaller.
while (true) {
aRegionToPaint.And(aInvalidRegion, tileBounds);
if (!aRegionToPaint.IsEmpty()) {
break;
}
if (Abs(scrollDiffY) >= Abs(scrollDiffX)) {
tileBounds.x += incX;
} else {
tileBounds.y += incY;
}
}
if (!aRegionToPaint.Contains(aInvalidRegion)) {
// The region needed to paint is larger then our progressive chunk size
// therefore update what we want to paint and ask for a new paint transaction.
// If we need to draw more than one tile to maintain coherency, make
// sure it happens in the same transaction by requesting this work be
// repeated immediately.
// If this is unnecessary, the remaining work will be done tile-by-tile in
// subsequent transactions. The caller code is responsible for scheduling
// the subsequent transactions as long as we don't set the mPaintFinished
// flag to true.
return (!drawingLowPrecision && paintInSingleTransaction);
}
// We're not repeating painting and we've not requested a repeat transaction,
// so the paint is finished. If there's still a separate low precision
// paint to do, it will get marked as unfinished later.
aPaintData->mPaintFinished = true;
return false;
}
bool
ClientTiledLayerBuffer::ProgressiveUpdate(nsIntRegion& aValidRegion,
nsIntRegion& aInvalidRegion,
const nsIntRegion& aOldValidRegion,
BasicTiledLayerPaintData* aPaintData,
LayerManager::DrawPaintedLayerCallback aCallback,
void* aCallbackData)
{
TILING_LOG("TILING %p: Progressive update valid region %s\n", mPaintedLayer, Stringify(aValidRegion).c_str());
TILING_LOG("TILING %p: Progressive update invalid region %s\n", mPaintedLayer, Stringify(aInvalidRegion).c_str());
TILING_LOG("TILING %p: Progressive update old valid region %s\n", mPaintedLayer, Stringify(aOldValidRegion).c_str());
bool repeat = false;
bool isBufferChanged = false;
do {
// Compute the region that should be updated. Repeat as many times as
// is required.
nsIntRegion regionToPaint;
repeat = ComputeProgressiveUpdateRegion(aInvalidRegion,
aOldValidRegion,
regionToPaint,
aPaintData,
repeat);
TILING_LOG("TILING %p: Progressive update computed paint region %s repeat %d\n", mPaintedLayer, Stringify(regionToPaint).c_str(), repeat);
// There's no further work to be done.
if (regionToPaint.IsEmpty()) {
break;
}
isBufferChanged = true;
// Keep track of what we're about to refresh.
aValidRegion.Or(aValidRegion, regionToPaint);
// aValidRegion may have been altered by InvalidateRegion, but we still
// want to display stale content until it gets progressively updated.
// Create a region that includes stale content.
nsIntRegion validOrStale;
validOrStale.Or(aValidRegion, aOldValidRegion);
// Paint the computed region and subtract it from the invalid region.
PaintThebes(validOrStale, regionToPaint, aCallback, aCallbackData);
aInvalidRegion.Sub(aInvalidRegion, regionToPaint);
} while (repeat);
TILING_LOG("TILING %p: Progressive update final valid region %s buffer changed %d\n", mPaintedLayer, Stringify(aValidRegion).c_str(), isBufferChanged);
TILING_LOG("TILING %p: Progressive update final invalid region %s\n", mPaintedLayer, Stringify(aInvalidRegion).c_str());
// Return false if nothing has been drawn, or give what has been drawn
// to the shadow layer to upload.
return isBufferChanged;
}
}
}
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