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gecko/gfx/layers/CopyableCanvasLayer.cpp
Tor Arvid Lund 7af55748fb Bug 973976 - Revert to Thebes path for CopyableCanvasLayer. r=jmuizelaar 
The performance on the Mac platform degraded after porting the code to
Moz2D in Bug 948765. This patch chooses the old thebes path instead of the
Moz2D path, so that performance is unaffected. This way we can easily
revert this patch at a later time when the perf issue has been fixed.
2014-03-17 10:49:21 -04:00

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/* -*- Mode: C++; tab-width: 2; 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 "BasicLayersImpl.h" // for FillWithMask, etc
#include "CopyableCanvasLayer.h"
#include "GLContext.h" // for GLContext
#include "GLScreenBuffer.h" // for GLScreenBuffer
#include "SharedSurface.h" // for SharedSurface
#include "SharedSurfaceGL.h" // for SharedSurface_GL, etc
#include "SurfaceTypes.h" // for APITypeT, APITypeT::OpenGL, etc
#include "gfxImageSurface.h" // for gfxImageSurface
#include "gfxMatrix.h" // for gfxMatrix
#include "gfxPattern.h" // for gfxPattern, etc
#include "gfxPlatform.h" // for gfxPlatform, gfxImageFormat
#include "gfxRect.h" // for gfxRect
#include "gfxUtils.h" // for gfxUtils
#include "gfx2DGlue.h" // for thebes --> moz2d transition
#include "mozilla/gfx/BaseSize.h" // for BaseSize
#include "nsDebug.h" // for NS_ASSERTION, NS_WARNING, etc
#include "nsISupportsImpl.h" // for gfxContext::AddRef, etc
#include "nsRect.h" // for nsIntRect
#include "nsSize.h" // for nsIntSize
#include "LayerUtils.h"
using namespace mozilla::gfx;
using namespace mozilla::gl;
namespace mozilla {
namespace layers {
CopyableCanvasLayer::CopyableCanvasLayer(LayerManager* aLayerManager, void *aImplData) :
CanvasLayer(aLayerManager, aImplData)
, mStream(nullptr)
{
MOZ_COUNT_CTOR(CopyableCanvasLayer);
}
CopyableCanvasLayer::~CopyableCanvasLayer()
{
MOZ_COUNT_DTOR(CopyableCanvasLayer);
}
void
CopyableCanvasLayer::Initialize(const Data& aData)
{
NS_ASSERTION(mSurface == nullptr, "BasicCanvasLayer::Initialize called twice!");
if (aData.mGLContext) {
mGLContext = aData.mGLContext;
mStream = aData.mStream;
mIsGLAlphaPremult = aData.mIsGLAlphaPremult;
mNeedsYFlip = true;
MOZ_ASSERT(mGLContext->IsOffscreen(), "canvas gl context isn't offscreen");
// [Basic Layers, non-OMTC] WebGL layer init.
// `GLScreenBuffer::Morph`ing is only needed in BasicShadowableCanvasLayer.
} else if (aData.mDrawTarget) {
mDrawTarget = aData.mDrawTarget;
mSurface = mDrawTarget->Snapshot();
mDeprecatedSurface =
gfxPlatform::GetPlatform()->CreateThebesSurfaceAliasForDrawTarget_hack(mDrawTarget);
mNeedsYFlip = false;
} else {
NS_ERROR("CanvasLayer created without mSurface, mDrawTarget or mGLContext?");
}
mBounds.SetRect(0, 0, aData.mSize.width, aData.mSize.height);
}
bool
CopyableCanvasLayer::IsDataValid(const Data& aData)
{
return mGLContext == aData.mGLContext && mStream == aData.mStream;
}
void
CopyableCanvasLayer::UpdateTarget(DrawTarget* aDestTarget,
SourceSurface* aMaskSurface)
{
if (!IsDirty())
return;
Painted();
if (mDrawTarget) {
mDrawTarget->Flush();
mSurface = mDrawTarget->Snapshot();
}
if (!mGLContext && aDestTarget) {
PaintWithOpacity(aDestTarget, 1.0f, aMaskSurface);
return;
}
if (mGLContext) {
RefPtr<DataSourceSurface> readSurf;
RefPtr<SourceSurface> resultSurf;
SharedSurface_GL* sharedSurf = mGLContext->RequestFrame();
if (!sharedSurf) {
NS_WARNING("Null frame received.");
return;
}
IntSize readSize(sharedSurf->Size());
SurfaceFormat format = (GetContentFlags() & CONTENT_OPAQUE)
? SurfaceFormat::B8G8R8X8
: SurfaceFormat::B8G8R8A8;
if (aDestTarget) {
resultSurf = aDestTarget->Snapshot();
if (!resultSurf) {
resultSurf = GetTempSurface(readSize, format);
}
} else {
resultSurf = GetTempSurface(readSize, format);
}
MOZ_ASSERT(resultSurf);
MOZ_ASSERT(sharedSurf->APIType() == APITypeT::OpenGL);
SharedSurface_GL* surfGL = SharedSurface_GL::Cast(sharedSurf);
if (surfGL->Type() == SharedSurfaceType::Basic) {
// sharedSurf_Basic->mData must outlive readSurf. Alas, readSurf may not
// leave the scope it was declared in.
SharedSurface_Basic* sharedSurf_Basic = SharedSurface_Basic::Cast(surfGL);
readSurf = sharedSurf_Basic->GetData();
} else {
if (resultSurf->GetSize() != readSize ||
!(readSurf = resultSurf->GetDataSurface()) ||
readSurf->GetFormat() != format)
{
readSurf = GetTempSurface(readSize, format);
}
// Readback handles Flush/MarkDirty.
mGLContext->Screen()->Readback(surfGL, readSurf);
}
MOZ_ASSERT(readSurf);
bool needsPremult = surfGL->HasAlpha() && !mIsGLAlphaPremult;
if (needsPremult) {
PremultiplySurface(readSurf);
}
if (readSurf != resultSurf) {
RefPtr<DataSourceSurface> resultDataSurface =
resultSurf->GetDataSurface();
RefPtr<DrawTarget> dt =
Factory::CreateDrawTargetForData(BackendType::CAIRO,
resultDataSurface->GetData(),
resultDataSurface->GetSize(),
resultDataSurface->Stride(),
resultDataSurface->GetFormat());
IntSize readSize = readSurf->GetSize();
Rect r(0, 0, readSize.width, readSize.height);
DrawOptions opts(1.0f, CompositionOp::OP_SOURCE, AntialiasMode::DEFAULT);
dt->DrawSurface(readSurf, r, r, DrawSurfaceOptions(), opts);
}
// If !aDestSurface then we will end up painting using mSurface, so
// stick our surface into mSurface, so that the Paint() path is the same.
if (!aDestTarget) {
mSurface = resultSurf;
}
}
}
void
CopyableCanvasLayer::DeprecatedUpdateSurface(gfxASurface* aDestSurface,
Layer* aMaskLayer)
{
if (!IsDirty())
return;
Painted();
if (mDrawTarget) {
mDrawTarget->Flush();
mDeprecatedSurface =
gfxPlatform::GetPlatform()->CreateThebesSurfaceAliasForDrawTarget_hack(mDrawTarget);
}
if (!mGLContext && aDestSurface) {
nsRefPtr<gfxContext> tmpCtx = new gfxContext(aDestSurface);
tmpCtx->SetOperator(gfxContext::OPERATOR_SOURCE);
DeprecatedPaintWithOpacity(tmpCtx, 1.0f, aMaskLayer);
return;
}
if (mGLContext) {
nsRefPtr<gfxImageSurface> readSurf;
RefPtr<DataSourceSurface> readDSurf;
nsRefPtr<gfxASurface> resultSurf;
SharedSurface_GL* sharedSurf = mGLContext->RequestFrame();
if (!sharedSurf) {
NS_WARNING("Null frame received.");
return;
}
IntSize readSize(sharedSurf->Size());
gfxImageFormat format = (GetContentFlags() & CONTENT_OPAQUE)
? gfxImageFormat::RGB24
: gfxImageFormat::ARGB32;
if (aDestSurface) {
resultSurf = aDestSurface;
} else {
resultSurf = DeprecatedGetTempSurface(readSize, format);
}
MOZ_ASSERT(resultSurf);
if (resultSurf->CairoStatus() != 0) {
MOZ_ASSERT(false, "Bad resultSurf->CairoStatus().");
return;
}
MOZ_ASSERT(sharedSurf->APIType() == APITypeT::OpenGL);
SharedSurface_GL* surfGL = SharedSurface_GL::Cast(sharedSurf);
if (surfGL->Type() == SharedSurfaceType::Basic) {
// sharedSurf_Basic->mData must outlive readSurf and readDSurf. Alas,
// readSurf and readDSurf may not leave the scope they were declared in.
SharedSurface_Basic* sharedSurf_Basic = SharedSurface_Basic::Cast(surfGL);
readDSurf = sharedSurf_Basic->GetData();
readSurf = new gfxImageSurface(readDSurf->GetData(),
ThebesIntSize(readDSurf->GetSize()),
readDSurf->Stride(),
SurfaceFormatToImageFormat(readDSurf->GetFormat()));
} else {
if (ToIntSize(resultSurf->GetSize()) != readSize ||
!(readSurf = resultSurf->GetAsImageSurface()) ||
readSurf->Format() != format)
{
readSurf = DeprecatedGetTempSurface(readSize, format);
}
// Readback handles Flush/MarkDirty.
mGLContext->Screen()->DeprecatedReadback(surfGL, readSurf);
}
MOZ_ASSERT(readSurf);
bool needsPremult = surfGL->HasAlpha() && !mIsGLAlphaPremult;
if (needsPremult) {
readSurf->Flush();
gfxUtils::PremultiplyImageSurface(readSurf);
readSurf->MarkDirty();
}
if (readSurf != resultSurf) {
readSurf->Flush();
nsRefPtr<gfxContext> ctx = new gfxContext(resultSurf);
ctx->SetOperator(gfxContext::OPERATOR_SOURCE);
ctx->SetSource(readSurf);
ctx->Paint();
}
// If !aDestSurface then we will end up painting using mSurface, so
// stick our surface into mSurface, so that the Paint() path is the same.
if (!aDestSurface) {
mDeprecatedSurface = resultSurf;
}
}
}
void
CopyableCanvasLayer::PaintWithOpacity(gfx::DrawTarget* aTarget,
float aOpacity,
SourceSurface* aMaskSurface,
gfx::CompositionOp aOperator)
{
if (!mSurface) {
NS_WARNING("No valid surface to draw!");
return;
}
SurfacePattern pat(mSurface, ExtendMode::CLAMP, Matrix(), ToFilter(mFilter));
Matrix oldTransform;
if (mNeedsYFlip) {
oldTransform = aTarget->GetTransform();
Matrix flipped = oldTransform;
flipped.Translate(0, mBounds.height);
flipped.Scale(1.0, -1.0);
aTarget->SetTransform(flipped);
}
DrawOptions options = DrawOptions(aOpacity, CompositionOp::OP_SOURCE);
if (aOperator != CompositionOp::OP_OVER) {
options.mCompositionOp = aOperator;
}
// XXX: This needs rewriting for acceptable performance using CoreGraphics.
// Therefore - this ::PaintWithOpacity is currently not used
Rect rect = Rect(0, 0, mBounds.width, mBounds.height);
aTarget->FillRect(rect, pat, options);
if (aMaskSurface) {
aTarget->MaskSurface(pat, aMaskSurface, Point(0, 0), options);
}
if (mNeedsYFlip) {
aTarget->SetTransform(oldTransform);
}
}
void
CopyableCanvasLayer::DeprecatedPaintWithOpacity(gfxContext* aContext,
float aOpacity,
Layer* aMaskLayer,
gfxContext::GraphicsOperator aOperator)
{
if (!mDeprecatedSurface) {
NS_WARNING("No valid surface to draw!");
return;
}
nsRefPtr<gfxPattern> pat = new gfxPattern(mDeprecatedSurface);
pat->SetFilter(mFilter);
pat->SetExtend(gfxPattern::EXTEND_PAD);
gfxMatrix m;
if (mNeedsYFlip) {
m = aContext->CurrentMatrix();
aContext->Translate(gfxPoint(0.0, mBounds.height));
aContext->Scale(1.0, -1.0);
}
// If content opaque, then save off current operator and set to source.
// This ensures that alpha is not applied even if the source surface
// has an alpha channel
gfxContext::GraphicsOperator savedOp;
if (GetContentFlags() & CONTENT_OPAQUE) {
savedOp = aContext->CurrentOperator();
aContext->SetOperator(gfxContext::OPERATOR_SOURCE);
}
AutoSetOperator setOperator(aContext, aOperator);
aContext->NewPath();
// No need to snap here; our transform is already set up to snap our rect
aContext->Rectangle(gfxRect(0, 0, mBounds.width, mBounds.height));
aContext->SetPattern(pat);
FillWithMask(aContext, aOpacity, aMaskLayer);
// Restore surface operator
if (GetContentFlags() & CONTENT_OPAQUE) {
aContext->SetOperator(savedOp);
}
if (mNeedsYFlip) {
aContext->SetMatrix(m);
}
}
DataSourceSurface*
CopyableCanvasLayer::GetTempSurface(const IntSize& aSize,
const SurfaceFormat aFormat)
{
if (!mCachedTempSurface ||
aSize.width != mCachedSize.width ||
aSize.height != mCachedSize.height ||
aFormat != mCachedFormat)
{
mCachedTempSurface = Factory::CreateDataSourceSurface(aSize, aFormat);
mCachedSize = aSize;
mCachedFormat = aFormat;
}
MOZ_ASSERT(mCachedTempSurface->Stride() ==
mCachedTempSurface->GetSize().width * 4);
return mCachedTempSurface;
}
gfxImageSurface*
CopyableCanvasLayer::DeprecatedGetTempSurface(const IntSize& aSize,
const gfxImageFormat aFormat)
{
if (!mDeprecatedCachedTempSurface ||
aSize.width != mCachedSize.width ||
aSize.height != mCachedSize.height ||
aFormat != mDeprecatedCachedFormat)
{
mDeprecatedCachedTempSurface =
new gfxImageSurface(ThebesIntSize(aSize), aFormat);
mCachedSize = aSize;
mDeprecatedCachedFormat = aFormat;
}
MOZ_ASSERT(mDeprecatedCachedTempSurface->Stride() ==
mDeprecatedCachedTempSurface->Width() * 4);
return mDeprecatedCachedTempSurface;
}
void
CopyableCanvasLayer::DiscardTempSurface()
{
mCachedTempSurface = nullptr;
mDeprecatedCachedTempSurface = nullptr;
}
}
}
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