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Bug 1262681 - Draw target also has to be valid for us to demand a snapshot. r=bas

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This commit is contained in:
Milan Sreckovic
2016-04-13 09:56:00 +02:00
parent 6d8586f214
commit dcff01cc7f
2 changed files with 31 additions and 18 deletions
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45
gfx/layers/RotatedBuffer.cpp
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@@ -99,6 +99,11 @@ RotatedBuffer::DrawBufferQuadrant(gfx::DrawTarget* aTarget,
MOZ_ASSERT(aSource != BUFFER_BOTH);
RefPtr<SourceSurface> snapshot = GetSourceSurface(aSource);
if (!snapshot) {
gfxCriticalError() << "Invalid snapshot in RotatedBuffer::DrawBufferQuadrant";
return;
}
// direct2d is much slower when using OP_SOURCE so use OP_OVER and
// (maybe) a clear instead. Normally we need to draw in a single operation
// (to avoid flickering) but direct2d is ok since it defers rendering.
@@ -275,7 +280,7 @@ RotatedContentBuffer::BorrowDrawTargetForQuadrantUpdate(const IntRect& aBounds,
if (!EnsureBufferOnWhite()) {
return nullptr;
}
MOZ_ASSERT(mDTBuffer && mDTBufferOnWhite);
MOZ_ASSERT(mDTBuffer && mDTBuffer->IsValid() && mDTBufferOnWhite && mDTBufferOnWhite->IsValid());
mLoanedDrawTarget = Factory::CreateDualDrawTarget(mDTBuffer, mDTBufferOnWhite);
} else if (aSource == BUFFER_WHITE) {
if (!EnsureBufferOnWhite()) {
@@ -318,12 +323,12 @@ BorrowDrawTarget::ReturnDrawTarget(gfx::DrawTarget*& aReturned)
gfxContentType
RotatedContentBuffer::BufferContentType()
{
if (mBufferProvider || mDTBuffer) {
SurfaceFormat format;
if (mBufferProvider || (mDTBuffer && mDTBuffer->IsValid())) {
SurfaceFormat format = SurfaceFormat::B8G8R8A8;
if (mBufferProvider) {
format = mBufferProvider->GetFormat();
} else if (mDTBuffer) {
} else if (mDTBuffer && mDTBuffer->IsValid()) {
format = mDTBuffer->GetFormat();
}
@@ -344,13 +349,13 @@ bool
RotatedContentBuffer::EnsureBuffer()
{
NS_ASSERTION(!mLoanedDrawTarget, "Loaned draw target must be returned");
if (!mDTBuffer) {
if (!mDTBuffer || !mDTBuffer->IsValid()) {
if (mBufferProvider) {
mDTBuffer = mBufferProvider->BorrowDrawTarget();
}
}
NS_WARN_IF_FALSE(mDTBuffer, "no buffer");
NS_WARN_IF_FALSE(mDTBuffer && mDTBuffer->IsValid(), "no buffer");
return !!mDTBuffer;
}
@@ -372,13 +377,13 @@ RotatedContentBuffer::EnsureBufferOnWhite()
bool
RotatedContentBuffer::HaveBuffer() const
{
return mDTBuffer || mBufferProvider;
return mBufferProvider || (mDTBuffer && mDTBuffer->IsValid());
}
bool
RotatedContentBuffer::HaveBufferOnWhite() const
{
return mDTBufferOnWhite || mBufferProviderOnWhite;
return mBufferProviderOnWhite || (mDTBufferOnWhite && mDTBufferOnWhite->IsValid());
}
static void
@@ -591,13 +596,13 @@ RotatedContentBuffer::BeginPaint(PaintedLayer* aLayer,
if (mBufferRotation == IntPoint(0,0)) {
IntRect srcRect(IntPoint(0, 0), mBufferRect.Size());
IntPoint dest = mBufferRect.TopLeft() - destBufferRect.TopLeft();
MOZ_ASSERT(mDTBuffer);
MOZ_ASSERT(mDTBuffer && mDTBuffer->IsValid());
mDTBuffer->CopyRect(srcRect, dest);
if (mode == SurfaceMode::SURFACE_COMPONENT_ALPHA) {
if (!EnsureBufferOnWhite()) {
return result;
}
MOZ_ASSERT(mDTBufferOnWhite);
MOZ_ASSERT(mDTBufferOnWhite && mDTBufferOnWhite->IsValid());
mDTBufferOnWhite->CopyRect(srcRect, dest);
}
result.mDidSelfCopy = true;
@@ -625,7 +630,7 @@ RotatedContentBuffer::BeginPaint(PaintedLayer* aLayer,
if (!EnsureBufferOnWhite()) {
return result;
}
MOZ_ASSERT(mDTBufferOnWhite);
MOZ_ASSERT(mDTBufferOnWhite && mDTBufferOnWhite->IsValid());
mDTBufferOnWhite->LockBits(&data, &size, &stride, &format);
uint8_t bytesPerPixel = BytesPerPixel(format);
BufferUnrotate(data,
@@ -692,7 +697,7 @@ RotatedContentBuffer::BeginPaint(PaintedLayer* aLayer,
if (!EnsureBuffer()) {
return result;
}
MOZ_ASSERT(mDTBuffer, "Have we got a Thebes buffer for some reason?");
MOZ_ASSERT(mDTBuffer && mDTBuffer->IsValid(), "Have we got a Thebes buffer for some reason?");
DrawBufferWithRotation(destDTBuffer, BUFFER_BLACK, 1.0, CompositionOp::OP_SOURCE);
destDTBuffer->SetTransform(Matrix());
@@ -700,7 +705,7 @@ RotatedContentBuffer::BeginPaint(PaintedLayer* aLayer,
if (!destDTBufferOnWhite || !EnsureBufferOnWhite()) {
return result;
}
MOZ_ASSERT(mDTBufferOnWhite, "Have we got a Thebes buffer for some reason?");
MOZ_ASSERT(mDTBufferOnWhite && mDTBufferOnWhite->IsValid(), "Have we got a Thebes buffer for some reason?");
destDTBufferOnWhite->SetTransform(mat);
DrawBufferWithRotation(destDTBufferOnWhite, BUFFER_WHITE, 1.0, CompositionOp::OP_SOURCE);
destDTBufferOnWhite->SetTransform(Matrix());
@@ -753,7 +758,8 @@ RotatedContentBuffer::BorrowDrawTargetForPainting(PaintState& aPaintState,
}
if (aPaintState.mMode == SurfaceMode::SURFACE_COMPONENT_ALPHA) {
if (!mDTBuffer || !mDTBufferOnWhite) {
if (!mDTBuffer || !mDTBuffer->IsValid() ||
!mDTBufferOnWhite || !mDTBufferOnWhite->IsValid()) {
// This can happen in release builds if allocating one of the two buffers
// failed. This in turn can happen if unreasonably large textures are
// requested.
@@ -780,11 +786,18 @@ RotatedContentBuffer::BorrowDrawTargetForPainting(PaintState& aPaintState,
already_AddRefed<SourceSurface>
RotatedContentBuffer::GetSourceSurface(ContextSource aSource) const
{
MOZ_ASSERT(mDTBuffer);
if (!mDTBuffer || !mDTBuffer->IsValid()) {
gfxCriticalNote << "Invalid buffer in RotatedContentBuffer::GetSourceSurface " << gfx::hexa(mDTBuffer);
return nullptr;
}
if (aSource == BUFFER_BLACK) {
return mDTBuffer->Snapshot();
} else {
MOZ_ASSERT(mDTBufferOnWhite);
if (!mDTBufferOnWhite || !mDTBufferOnWhite->IsValid()) {
gfxCriticalNote << "Invalid buffer on white in RotatedContentBuffer::GetSourceSurface " << gfx::hexa(mDTBufferOnWhite);
return nullptr;
}
MOZ_ASSERT(aSource == BUFFER_WHITE);
return mDTBufferOnWhite->Snapshot();
}