bool
DeprecatedContentHostSingleBuffered::UpdateThebes(const ThebesBufferData& aData,
const nsIntRegion& aUpdated,
const nsIntRegion& aOldValidRegionBack,
nsIntRegion* aUpdatedRegionBack)
{
aUpdatedRegionBack->SetEmpty();
if (!mDeprecatedTextureHost && !mNewFrontHost) {
mInitialised = false;
return true;
}
if (mNewFrontHost) {
DestroyFrontHost();
mDeprecatedTextureHost = mNewFrontHost;
mNewFrontHost = nullptr;
if (mNewFrontHostOnWhite) {
mDeprecatedTextureHostOnWhite = mNewFrontHostOnWhite;
mNewFrontHostOnWhite = nullptr;
}
}
MOZ_ASSERT(mDeprecatedTextureHost);
MOZ_ASSERT(!mNewFrontHostOnWhite, "New white host without a new black?");
// updated is in screen coordinates. Convert it to buffer coordinates.
nsIntRegion destRegion(aUpdated);
destRegion.MoveBy(-aData.rect().TopLeft());
// Correct for rotation
destRegion.MoveBy(aData.rotation());
IntSize size = aData.rect().Size().ToIntSize();
nsIntRect destBounds = destRegion.GetBounds();
destRegion.MoveBy((destBounds.x >= size.width) ? -size.width : 0,
(destBounds.y >= size.height) ? -size.height : 0);
// We can get arbitrary bad regions from an untrusted client,
// which we need to be resilient to. See bug 967330.
if((destBounds.x % size.width) + destBounds.width > size.width ||
(destBounds.y % size.height) + destBounds.height > size.height)
{
NS_ERROR("updated region lies across rotation boundaries!");
return false;
}
mDeprecatedTextureHost->Update(*mDeprecatedTextureHost->LockSurfaceDescriptor(), &destRegion);
if (mDeprecatedTextureHostOnWhite) {
mDeprecatedTextureHostOnWhite->Update(*mDeprecatedTextureHostOnWhite->LockSurfaceDescriptor(), &destRegion);
}
mInitialised = true;
mBufferRect = aData.rect();
mBufferRotation = aData.rotation();
return true;
}
bool
ContentHostSingleBuffered::UpdateThebes(const ThebesBufferData& aData,
const nsIntRegion& aUpdated,
const nsIntRegion& aOldValidRegionBack,
nsIntRegion* aUpdatedRegionBack)
{
aUpdatedRegionBack->SetEmpty();
if (!mTextureHost) {
mInitialised = false;
return true; // FIXME should we return false? Returning true for now
} // to preserve existing behavior of NOT causing IPC errors.
// updated is in screen coordinates. Convert it to buffer coordinates.
nsIntRegion destRegion(aUpdated);
destRegion.MoveBy(-aData.rect().TopLeft());
if (!aData.rect().Contains(aUpdated.GetBounds()) ||
aData.rotation().x > aData.rect().width ||
aData.rotation().y > aData.rect().height) {
NS_ERROR("Invalid update data");
return false;
}
// destRegion is now in logical coordinates relative to the buffer, but we
// need to account for rotation. We do that by moving the region to the
// rotation offset and then wrapping any pixels that extend off the
// bottom/right edges.
// Shift to the rotation point
destRegion.MoveBy(aData.rotation());
nsIntSize bufferSize = aData.rect().Size();
// Select only the pixels that are still within the buffer.
nsIntRegion finalRegion;
finalRegion.And(nsIntRect(nsIntPoint(), bufferSize), destRegion);
// For each of the overlap areas (right, bottom-right, bottom), select those
// pixels and wrap them around to the opposite edge of the buffer rect.
AddWrappedRegion(destRegion, finalRegion, bufferSize, nsIntPoint(aData.rect().width, 0));
AddWrappedRegion(destRegion, finalRegion, bufferSize, nsIntPoint(aData.rect().width, aData.rect().height));
AddWrappedRegion(destRegion, finalRegion, bufferSize, nsIntPoint(0, aData.rect().height));
MOZ_ASSERT(nsIntRect(0, 0, aData.rect().width, aData.rect().height).Contains(finalRegion.GetBounds()));
mTextureHost->Updated(&finalRegion);
if (mTextureHostOnWhite) {
mTextureHostOnWhite->Updated(&finalRegion);
}
mInitialised = true;
mBufferRect = aData.rect();
mBufferRotation = aData.rotation();
return true;
}
void
DeprecatedContentHostSingleBuffered::UpdateThebes(const ThebesBufferData& aData,
const nsIntRegion& aUpdated,
const nsIntRegion& aOldValidRegionBack,
nsIntRegion* aUpdatedRegionBack)
{
aUpdatedRegionBack->SetEmpty();
if (!mDeprecatedTextureHost && !mNewFrontHost) {
mInitialised = false;
return;
}
if (mNewFrontHost) {
DestroyFrontHost();
mDeprecatedTextureHost = mNewFrontHost;
mNewFrontHost = nullptr;
if (mNewFrontHostOnWhite) {
mDeprecatedTextureHostOnWhite = mNewFrontHostOnWhite;
mNewFrontHostOnWhite = nullptr;
}
}
MOZ_ASSERT(mDeprecatedTextureHost);
MOZ_ASSERT(!mNewFrontHostOnWhite, "New white host without a new black?");
// updated is in screen coordinates. Convert it to buffer coordinates.
nsIntRegion destRegion(aUpdated);
destRegion.MoveBy(-aData.rect().TopLeft());
// Correct for rotation
destRegion.MoveBy(aData.rotation());
gfxIntSize size = aData.rect().Size();
nsIntRect destBounds = destRegion.GetBounds();
destRegion.MoveBy((destBounds.x >= size.width) ? -size.width : 0,
(destBounds.y >= size.height) ? -size.height : 0);
// There's code to make sure that updated regions don't cross rotation
// boundaries, so assert here that this is the case
MOZ_ASSERT((destBounds.x % size.width) + destBounds.width <= size.width,
"updated region lies across rotation boundaries!");
MOZ_ASSERT((destBounds.y % size.height) + destBounds.height <= size.height,
"updated region lies across rotation boundaries!");
mDeprecatedTextureHost->Update(*mDeprecatedTextureHost->LockSurfaceDescriptor(), &destRegion);
if (mDeprecatedTextureHostOnWhite) {
mDeprecatedTextureHostOnWhite->Update(*mDeprecatedTextureHostOnWhite->LockSurfaceDescriptor(), &destRegion);
}
mInitialised = true;
mBufferRect = aData.rect();
mBufferRotation = aData.rotation();
}
bool
ContentHostSingleBuffered::UpdateThebes(const ThebesBufferData& aData,
const nsIntRegion& aUpdated,
const nsIntRegion& aOldValidRegionBack,
nsIntRegion* aUpdatedRegionBack)
{
aUpdatedRegionBack->SetEmpty();
if (!mTextureHost) {
mInitialised = false;
return true; // FIXME should we return false? Returning true for now
} // to preserve existing behavior of NOT causing IPC errors.
// updated is in screen coordinates. Convert it to buffer coordinates.
nsIntRegion destRegion(aUpdated);
destRegion.MoveBy(-aData.rect().TopLeft());
// Correct for rotation
destRegion.MoveBy(aData.rotation());
IntSize size = aData.rect().Size().ToIntSize();
nsIntRect destBounds = destRegion.GetBounds();
destRegion.MoveBy((destBounds.x >= size.width) ? -size.width : 0,
(destBounds.y >= size.height) ? -size.height : 0);
// We can get arbitrary bad regions from an untrusted client,
// which we need to be resilient to. See bug 967330.
if((destBounds.x % size.width) + destBounds.width > size.width ||
(destBounds.y % size.height) + destBounds.height > size.height)
{
NS_ERROR("updated region lies across rotation boundaries!");
return false;
}
mTextureHost->Updated(&destRegion);
if (mTextureHostOnWhite) {
mTextureHostOnWhite->Updated(&destRegion);
}
mInitialised = true;
mBufferRect = aData.rect();
mBufferRotation = aData.rotation();
return true;
}
bool
DeprecatedContentHostDoubleBuffered::UpdateThebes(const ThebesBufferData& aData,
const nsIntRegion& aUpdated,
const nsIntRegion& aOldValidRegionBack,
nsIntRegion* aUpdatedRegionBack)
{
if (!mDeprecatedTextureHost && !mNewFrontHost) {
mInitialised = false;
*aUpdatedRegionBack = aUpdated;
return true;
}
if (mNewFrontHost) {
DestroyFrontHost();
mDeprecatedTextureHost = mNewFrontHost;
mNewFrontHost = nullptr;
if (mNewFrontHostOnWhite) {
mDeprecatedTextureHostOnWhite = mNewFrontHostOnWhite;
mNewFrontHostOnWhite = nullptr;
}
}
MOZ_ASSERT(mDeprecatedTextureHost);
MOZ_ASSERT(!mNewFrontHostOnWhite, "New white host without a new black?");
MOZ_ASSERT(mBackHost);
RefPtr<DeprecatedTextureHost> oldFront = mDeprecatedTextureHost;
mDeprecatedTextureHost = mBackHost;
mBackHost = oldFront;
oldFront = mDeprecatedTextureHostOnWhite;
mDeprecatedTextureHostOnWhite = mBackHostOnWhite;
mBackHostOnWhite = oldFront;
mDeprecatedTextureHost->Update(*mDeprecatedTextureHost->LockSurfaceDescriptor());
if (mDeprecatedTextureHostOnWhite) {
mDeprecatedTextureHostOnWhite->Update(*mDeprecatedTextureHostOnWhite->LockSurfaceDescriptor());
}
mInitialised = true;
mBufferRect = aData.rect();
mBufferRotation = aData.rotation();
*aUpdatedRegionBack = aUpdated;
// Save the current valid region of our front buffer, because if
// we're double buffering, it's going to be the valid region for the
// next back buffer sent back to the renderer.
//
// NB: we rely here on the fact that mValidRegion is initialized to
// empty, and that the first time Swap() is called we don't have a
// valid front buffer that we're going to return to content.
mValidRegionForNextBackBuffer = aOldValidRegionBack;
return true;
}
void
ContentHostSingleBuffered::UpdateThebes(const ThebesBufferData& aData,
const nsIntRegion& aUpdated,
const nsIntRegion& aOldValidRegionBack,
nsIntRegion* aUpdatedRegionBack)
{
aUpdatedRegionBack->SetEmpty();
if (!mTextureHost) {
mInitialised = false;
return;
}
// updated is in screen coordinates. Convert it to buffer coordinates.
nsIntRegion destRegion(aUpdated);
destRegion.MoveBy(-aData.rect().TopLeft());
// Correct for rotation
destRegion.MoveBy(aData.rotation());
gfxIntSize size = aData.rect().Size();
nsIntRect destBounds = destRegion.GetBounds();
destRegion.MoveBy((destBounds.x >= size.width) ? -size.width : 0,
(destBounds.y >= size.height) ? -size.height : 0);
// There's code to make sure that updated regions don't cross rotation
// boundaries, so assert here that this is the case
MOZ_ASSERT((destBounds.x % size.width) + destBounds.width <= size.width,
"updated region lies across rotation boundaries!");
MOZ_ASSERT((destBounds.y % size.height) + destBounds.height <= size.height,
"updated region lies across rotation boundaries!");
mTextureHost->Updated(&destRegion);
if (mTextureHostOnWhite) {
mTextureHostOnWhite->Updated(&destRegion);
}
mInitialised = true;
mBufferRect = aData.rect();
mBufferRotation = aData.rotation();
}
bool
ContentHostDoubleBuffered::UpdateThebes(const ThebesBufferData& aData,
const nsIntRegion& aUpdated,
const nsIntRegion& aOldValidRegionBack,
nsIntRegion* aUpdatedRegionBack)
{
if (!mTextureHost) {
mInitialised = false;
*aUpdatedRegionBack = aUpdated;
return true;
}
// We don't need to calculate an update region because we assume that if we
// are using double buffering then we have render-to-texture and thus no
// upload to do.
mTextureHost->Updated();
if (mTextureHostOnWhite) {
mTextureHostOnWhite->Updated();
}
mInitialised = true;
mBufferRect = aData.rect();
mBufferRotation = aData.rotation();
*aUpdatedRegionBack = aUpdated;
// Save the current valid region of our front buffer, because if
// we're double buffering, it's going to be the valid region for the
// next back buffer sent back to the renderer.
//
// NB: we rely here on the fact that mValidRegion is initialized to
// empty, and that the first time Swap() is called we don't have a
// valid front buffer that we're going to return to content.
mValidRegionForNextBackBuffer = aOldValidRegionBack;
return true;
}