already_AddRefed<Path>
nsSVGPathGeometryElement::GetOrBuildPath(const DrawTarget& aDrawTarget,
FillRule aFillRule)
{
// We only cache the path if it matches the backend used for screen painting:
bool cacheable = aDrawTarget.GetBackendType() ==
gfxPlatform::GetPlatform()->GetDefaultContentBackend();
// Checking for and returning mCachedPath before checking the pref means
// that the pref is only live on page reload (or app restart for SVG in
// chrome). The benefit is that we avoid causing a CPU memory cache miss by
// looking at the global variable that the pref's stored in.
if (cacheable && mCachedPath) {
if (aDrawTarget.GetBackendType() == mCachedPath->GetBackendType()) {
RefPtr<Path> path(mCachedPath);
return path.forget();
}
}
RefPtr<PathBuilder> builder = aDrawTarget.CreatePathBuilder(aFillRule);
RefPtr<Path> path = BuildPath(builder);
if (cacheable && NS_SVGPathCachingEnabled()) {
mCachedPath = path;
}
return path.forget();
}
CGContextRef
gfxQuartzNativeDrawing::BeginNativeDrawing()
{
NS_ASSERTION(!mCGContext, "BeginNativeDrawing called when drawing already in progress");
DrawTarget *dt = mDrawTarget;
if (dt->IsDualDrawTarget() || dt->IsTiledDrawTarget() ||
dt->GetBackendType() != BackendType::SKIA || dt->IsRecording()) {
// We need a DrawTarget that we can get a CGContextRef from:
Matrix transform = dt->GetTransform();
mNativeRect = transform.TransformBounds(mNativeRect);
mNativeRect.RoundOut();
if (mNativeRect.IsEmpty()) {
return nullptr;
}
mTempDrawTarget =
Factory::CreateDrawTarget(BackendType::SKIA,
IntSize::Truncate(mNativeRect.width, mNativeRect.height),
SurfaceFormat::B8G8R8A8);
if (!mTempDrawTarget) {
return nullptr;
}
transform.PostTranslate(-mNativeRect.x, -mNativeRect.y);
mTempDrawTarget->SetTransform(transform);
dt = mTempDrawTarget;
} else {
// Clip the DT in case BorrowedCGContext needs to create a new layer.
// This prevents it from creating a new layer the size of the window.
// But make sure that this clip is device pixel aligned.
Matrix transform = dt->GetTransform();
Rect deviceRect = transform.TransformBounds(mNativeRect);
deviceRect.RoundOut();
mNativeRect = transform.Inverse().TransformBounds(deviceRect);
mDrawTarget->PushClipRect(mNativeRect);
}
MOZ_ASSERT(dt->GetBackendType() == BackendType::SKIA);
mCGContext = mBorrowedContext.Init(dt);
if (NS_WARN_IF(!mCGContext)) {
// Failed borrowing CG context, so we need to clean up.
if (!mTempDrawTarget) {
mDrawTarget->PopClip();
}
return nullptr;
}
return mCGContext;
}
static void
RepeatOrStretchSurface(DrawTarget& aDT, SourceSurface* aSurface,
const Rect& aDest, const Rect& aSrc, Rect& aSkipRect)
{
if (aSkipRect.Contains(aDest)) {
return;
}
if ((!aDT.GetTransform().IsRectilinear() &&
aDT.GetBackendType() != BackendType::CAIRO) ||
(aDT.GetBackendType() == BackendType::DIRECT2D)) {
// Use stretching if possible, since it leads to less seams when the
// destination is transformed. However, don't do this if we're using cairo,
// because if cairo is using pixman it won't render anything for large
// stretch factors because pixman's internal fixed point precision is not
// high enough to handle those scale factors.
// Calling FillRect on a D2D backend with a repeating pattern is much slower
// than DrawSurface, so special case the D2D backend here.
aDT.DrawSurface(aSurface, aDest, aSrc);
return;
}
SurfacePattern pattern(aSurface, ExtendMode::REPEAT,
Matrix::Translation(aDest.TopLeft() - aSrc.TopLeft()),
Filter::GOOD, RoundedToInt(aSrc));
aDT.FillRect(aDest, pattern);
}
CGContextRef
gfxQuartzNativeDrawing::BeginNativeDrawing()
{
NS_ASSERTION(!mCGContext, "BeginNativeDrawing called when drawing already in progress");
if (mContext->IsCairo()) {
// We're past that now. Any callers that still supply a Cairo context
// don't deserve native theming.
NS_WARNING("gfxQuartzNativeDrawing being used with a gfxContext that is not backed by a DrawTarget");
return nullptr;
}
DrawTarget *dt = mContext->GetDrawTarget();
if (dt->GetBackendType() != BackendType::COREGRAPHICS || dt->IsDualDrawTarget()) {
IntSize backingSize(NSToIntFloor(mNativeRect.width * mBackingScale),
NSToIntFloor(mNativeRect.height * mBackingScale));
if (backingSize.IsEmpty()) {
return nullptr;
}
mDrawTarget = Factory::CreateDrawTarget(BackendType::COREGRAPHICS, backingSize, SurfaceFormat::B8G8R8A8);
Matrix transform;
transform.Scale(mBackingScale, mBackingScale);
transform.Translate(-mNativeRect.x, -mNativeRect.y);
mDrawTarget->SetTransform(transform);
dt = mDrawTarget;
}
mCGContext = mBorrowedContext.Init(dt);
MOZ_ASSERT(mCGContext);
return mCGContext;
}
static already_AddRefed<SourceSurface>
GetBlur(gfxContext* aDestinationCtx,
const IntSize& aRectSize,
const IntSize& aBlurRadius,
const RectCornerRadii* aCornerRadii,
const Color& aShadowColor,
bool aMirrorCorners,
IntMargin& aOutBlurMargin,
IntMargin& aOutSlice,
IntSize& aOutMinSize)
{
if (!gBlurCache) {
gBlurCache = new BlurCache();
}
IntSize minSize =
ComputeMinSizeForShadowShape(aCornerRadii, aBlurRadius, aOutSlice, aRectSize);
// We can get seams using the min size rect when drawing to the destination rect
// if we have a non-pixel aligned destination transformation. In those cases,
// fallback to just rendering the destination rect.
Matrix destMatrix = ToMatrix(aDestinationCtx->CurrentMatrix());
bool useDestRect = !destMatrix.IsRectilinear() || destMatrix.HasNonIntegerTranslation();
if (useDestRect) {
minSize = aRectSize;
}
aOutMinSize = minSize;
DrawTarget* destDT = aDestinationCtx->GetDrawTarget();
if (!useDestRect) {
BlurCacheData* cached = gBlurCache->Lookup(minSize, aBlurRadius,
aCornerRadii, aShadowColor,
destDT->GetBackendType());
if (cached) {
// See CreateBoxShadow() for these values
aOutBlurMargin = cached->mBlurMargin;
RefPtr<SourceSurface> blur = cached->mBlur;
return blur.forget();
}
}
RefPtr<SourceSurface> boxShadow =
CreateBoxShadow(destDT, minSize, aCornerRadii, aBlurRadius,
aShadowColor, aMirrorCorners, aOutBlurMargin);
if (!boxShadow) {
return nullptr;
}
if (!useDestRect) {
CacheBlur(destDT, minSize, aBlurRadius, aCornerRadii, aShadowColor,
aOutBlurMargin, boxShadow);
}
return boxShadow.forget();
}
void
CacheBlur(DrawTarget& aDT,
const IntSize& aMinSize,
const gfxIntSize& aBlurRadius,
RectCornerRadii* aCornerRadii,
const gfxRGBA& aShadowColor,
IntMargin aExtendDest,
SourceSurface* aBoxShadow)
{
BlurCacheKey key(aMinSize, aBlurRadius, aCornerRadii, aShadowColor, aDT.GetBackendType());
BlurCacheData* data = new BlurCacheData(aBoxShadow, aExtendDest, key);
if (!gBlurCache->RegisterEntry(data)) {
delete data;
}
}
HDC
gfxWindowsNativeDrawing::BeginNativeDrawing()
{
if (mRenderState == RENDER_STATE_INIT) {
RefPtr<gfxASurface> surf;
DrawTarget* drawTarget = mContext->GetDrawTarget();
cairo_t* cairo = nullptr;
if (drawTarget->GetBackendType() == BackendType::CAIRO) {
cairo = static_cast<cairo_t*>
(drawTarget->GetNativeSurface(NativeSurfaceType::CAIRO_CONTEXT));
if (cairo) {
cairo_surface_t* s = cairo_get_target(cairo);
if (s) {
mDeviceOffset = mContext->GetDeviceOffset();
surf = gfxASurface::Wrap(s);
}
}
}
if (surf && surf->CairoStatus() != 0)
return nullptr;
gfxMatrix m = mContext->CurrentMatrix();
if (!m.HasNonTranslation())
mTransformType = TRANSLATION_ONLY;
else if (m.HasNonAxisAlignedTransform())
mTransformType = COMPLEX;
else
mTransformType = AXIS_ALIGNED_SCALE;
// if this is a native win32 surface, we don't have to
// redirect rendering to our own HDC; in some cases,
// we may be able to use the HDC from the surface directly.
if (surf &&
((surf->GetType() == gfxSurfaceType::Win32 ||
surf->GetType() == gfxSurfaceType::Win32Printing) &&
(surf->GetContentType() == gfxContentType::COLOR ||
(surf->GetContentType() == gfxContentType::COLOR_ALPHA &&
(mNativeDrawFlags & CAN_DRAW_TO_COLOR_ALPHA)))))
{
// grab the DC. This can fail if there is a complex clipping path,
// in which case we'll have to fall back.
mWinSurface = static_cast<gfxWindowsSurface*>(static_cast<gfxASurface*>(surf.get()));
mDC = cairo_win32_get_dc_with_clip(cairo);
if (mDC) {
if (mTransformType == TRANSLATION_ONLY) {
mRenderState = RENDER_STATE_NATIVE_DRAWING;
mTranslation = m.GetTranslation();
} else if (((mTransformType == AXIS_ALIGNED_SCALE)
&& (mNativeDrawFlags & CAN_AXIS_ALIGNED_SCALE)) ||
(mNativeDrawFlags & CAN_COMPLEX_TRANSFORM))
{
mWorldTransform.eM11 = (FLOAT) m._11;
mWorldTransform.eM12 = (FLOAT) m._12;
mWorldTransform.eM21 = (FLOAT) m._21;
mWorldTransform.eM22 = (FLOAT) m._22;
mWorldTransform.eDx = (FLOAT) m._31;
mWorldTransform.eDy = (FLOAT) m._32;
mRenderState = RENDER_STATE_NATIVE_DRAWING;
}
}
}
// If we couldn't do native drawing, then we have to do two-buffer drawing
// and do alpha recovery
if (mRenderState == RENDER_STATE_INIT) {
mRenderState = RENDER_STATE_ALPHA_RECOVERY_BLACK;
// We round out our native rect here, that way the snapping will
// happen correctly.
mNativeRect.RoundOut();
// we only do the scale bit if we can do an axis aligned
// scale; otherwise we scale (if necessary) after
// rendering with cairo. Note that if we're doing alpha recovery,
// we cannot do a full complex transform with win32 (I mean, we could, but
// it would require more code that's not here.)
if (mTransformType == TRANSLATION_ONLY || !(mNativeDrawFlags & CAN_AXIS_ALIGNED_SCALE)) {
mScale = gfxSize(1.0, 1.0);
// Add 1 to the surface size; it's guaranteed to not be incorrect,
// and it fixes bug 382458
// There's probably a better fix, but I haven't figured out
// the root cause of the problem.
mTempSurfaceSize =
IntSize((int32_t) ceil(mNativeRect.Width() + 1),
(int32_t) ceil(mNativeRect.Height() + 1));
} else {
// figure out the scale factors
mScale = m.ScaleFactors(true);
mWorldTransform.eM11 = (FLOAT) mScale.width;
mWorldTransform.eM12 = 0.0f;
mWorldTransform.eM21 = 0.0f;
mWorldTransform.eM22 = (FLOAT) mScale.height;
mWorldTransform.eDx = 0.0f;
mWorldTransform.eDy = 0.0f;
// See comment above about "+1"
mTempSurfaceSize =
IntSize((int32_t) ceil(mNativeRect.Width() * mScale.width + 1),
(int32_t) ceil(mNativeRect.Height() * mScale.height + 1));
}
}
}
if (mRenderState == RENDER_STATE_NATIVE_DRAWING) {
// we can just do native drawing directly to the context's surface
// do we need to use SetWorldTransform?
if (mTransformType != TRANSLATION_ONLY) {
SetGraphicsMode(mDC, GM_ADVANCED);
GetWorldTransform(mDC, &mOldWorldTransform);
SetWorldTransform(mDC, &mWorldTransform);
}
GetViewportOrgEx(mDC, &mOrigViewportOrigin);
SetViewportOrgEx(mDC,
mOrigViewportOrigin.x - (int)mDeviceOffset.x,
mOrigViewportOrigin.y - (int)mDeviceOffset.y,
nullptr);
return mDC;
} else if (mRenderState == RENDER_STATE_ALPHA_RECOVERY_BLACK ||
mRenderState == RENDER_STATE_ALPHA_RECOVERY_WHITE)
{
// we're going to use mWinSurface to create our temporary surface here
// get us a RGB24 DIB; DIB is important, because
// we can later call GetImageSurface on it.
mWinSurface = new gfxWindowsSurface(mTempSurfaceSize);
mDC = mWinSurface->GetDC();
RECT r = { 0, 0, mTempSurfaceSize.width, mTempSurfaceSize.height };
if (mRenderState == RENDER_STATE_ALPHA_RECOVERY_BLACK)
FillRect(mDC, &r, (HBRUSH)GetStockObject(BLACK_BRUSH));
else
FillRect(mDC, &r, (HBRUSH)GetStockObject(WHITE_BRUSH));
if ((mTransformType != TRANSLATION_ONLY) &&
(mNativeDrawFlags & CAN_AXIS_ALIGNED_SCALE))
{
SetGraphicsMode(mDC, GM_ADVANCED);
SetWorldTransform(mDC, &mWorldTransform);
}
return mDC;
} else {
NS_ERROR("Bogus render state!");
return nullptr;
}
}
static already_AddRefed<SourceSurface>
GetBlur(gfxContext* aDestinationCtx,
const IntSize& aRectSize,
const IntSize& aBlurRadius,
const RectCornerRadii* aCornerRadii,
const Color& aShadowColor,
bool aMirrorCorners,
IntMargin& aOutBlurMargin,
IntMargin& aOutSlice,
IntSize& aOutMinSize)
{
if (!gBlurCache) {
gBlurCache = new BlurCache();
}
IntSize minSize =
ComputeMinSizeForShadowShape(aCornerRadii, aBlurRadius, aOutSlice, aRectSize);
// We can get seams using the min size rect when drawing to the destination rect
// if we have a non-pixel aligned destination transformation. In those cases,
// fallback to just rendering the destination rect.
// During printing, we record all the Moz 2d commands and replay them on the parent side
// with Cairo. Cairo printing uses StretchDIBits to stretch the surface. However,
// since our source image is only 1px for some parts, we make thousands of calls.
// Instead just render the blur ourself here as one image and send it over for printing.
// TODO: May need to change this with the blob renderer in WR since it also records.
Matrix destMatrix = ToMatrix(aDestinationCtx->CurrentMatrix());
bool useDestRect = !destMatrix.IsRectilinear() || destMatrix.HasNonIntegerTranslation() ||
aDestinationCtx->GetDrawTarget()->IsRecording();
if (useDestRect) {
minSize = aRectSize;
}
aOutMinSize = minSize;
DrawTarget* destDT = aDestinationCtx->GetDrawTarget();
if (!useDestRect) {
BlurCacheData* cached = gBlurCache->Lookup(minSize, aBlurRadius,
aCornerRadii, aShadowColor,
destDT->GetBackendType());
if (cached) {
// See CreateBoxShadow() for these values
aOutBlurMargin = cached->mBlurMargin;
RefPtr<SourceSurface> blur = cached->mBlur;
return blur.forget();
}
}
RefPtr<SourceSurface> boxShadow =
CreateBoxShadow(destDT, minSize, aCornerRadii, aBlurRadius,
aShadowColor, aMirrorCorners, aOutBlurMargin);
if (!boxShadow) {
return nullptr;
}
if (RefPtr<SourceSurface> opt = destDT->OptimizeSourceSurface(boxShadow)) {
boxShadow = opt;
}
if (!useDestRect) {
CacheBlur(destDT, minSize, aBlurRadius, aCornerRadii, aShadowColor,
aOutBlurMargin, boxShadow);
}
return boxShadow.forget();
}
already_AddRefed<mozilla::gfx::SourceSurface>
gfxAlphaBoxBlur::GetInsetBlur(Rect& aOuterRect,
Rect& aInnerRect,
const gfxIntSize& aBlurRadius,
const gfxIntSize& aSpreadRadius,
const RectCornerRadii& aInnerClipRadii,
const Color& aShadowColor,
const bool& aHasBorderRadius,
IntPoint& aOutTopLeft,
gfxContext* aDestinationCtx)
{
if (!gBlurCache) {
gBlurCache = new BlurCache();
}
gfxIntSize outerRectSize = RoundedToInt(aOuterRect).Size();
gfxIntSize innerRectSize = RoundedToInt(aInnerRect).Size();
DrawTarget* destDrawTarget = aDestinationCtx->GetDrawTarget();
BlurCacheData* cached =
gBlurCache->LookupInsetBoxShadow(outerRectSize, innerRectSize, aBlurRadius, aSpreadRadius,
&aInnerClipRadii, ThebesColor(aShadowColor),
aHasBorderRadius, destDrawTarget->GetBackendType());
if (cached) {
IntMargin extends = cached->mExtendDest;
aOutTopLeft.x = extends.left;
aOutTopLeft.y = extends.top;
// So we don't forget the actual cached blur
RefPtr<SourceSurface> cachedBlur = cached->mBlur;
return cachedBlur.forget();
}
// Dirty rect and skip rect are null for the min inset shadow.
// When rendering inset box shadows, we respect the spread radius by changing
// the shape of the unblurred shadow, and can pass a spread radius of zero here.
gfxIntSize zeroSpread(0, 0);
gfxContext* minGfxContext = Init(ThebesRect(aOuterRect), zeroSpread, aBlurRadius, nullptr, nullptr);
if (!minGfxContext) {
return nullptr;
}
DrawTarget* minDrawTarget = minGfxContext->GetDrawTarget();
RefPtr<Path> maskPath = GetBoxShadowInsetPath(minDrawTarget, aOuterRect,
aInnerRect, aHasBorderRadius,
aInnerClipRadii);
minGfxContext->SetColor(ThebesColor(aShadowColor));
minGfxContext->SetPath(maskPath);
minGfxContext->Fill();
RefPtr<SourceSurface> minMask = DoBlur(minDrawTarget, &aOutTopLeft);
if (!minMask) {
return nullptr;
}
RefPtr<SourceSurface> minInsetBlur = CreateBoxShadow(minMask, ThebesColor(aShadowColor));
if (!minInsetBlur) {
return nullptr;
}
IntMargin extendBy(aOutTopLeft.y, 0, 0, aOutTopLeft.x);
CacheInsetBlur(outerRectSize, innerRectSize,
aBlurRadius, aSpreadRadius,
&aInnerClipRadii, ThebesColor(aShadowColor),
aHasBorderRadius, destDrawTarget->GetBackendType(),
extendBy, minInsetBlur);
return minInsetBlur.forget();
}
/***
* If we can, let's paint this ClientPaintedLayer's contents off the main thread.
* The essential idea is that we ask the ContentClient for a DrawTarget and record
* the moz2d commands. On the Paint Thread, we replay those commands to the
* destination draw target. There are a couple of lifetime issues here though:
*
* 1) TextureClient owns the underlying buffer and DrawTarget. Because of this
* we have to keep the TextureClient and DrawTarget alive but trick the
* TextureClient into thinking it's already returned the DrawTarget
* since we iterate through different Rects to get DrawTargets*. If
* the TextureClient goes away, the DrawTarget and thus buffer can too.
* 2) When ContentClient::EndPaint happens, it flushes the DrawTarget. We have
* to Reflush on the Paint Thread
* 3) DrawTarget API is NOT thread safe. We get around this by recording
* on the main thread and painting on the paint thread. Logically,
* ClientLayerManager will force a flushed paint and block the main thread
* if we have another transaction. Thus we have a gap between when the main
* thread records, the paint thread paints, and we block the main thread
* from trying to paint again. The underlying API however is NOT thread safe.
* 4) We have both "sync" and "async" OMTP. Sync OMTP means we paint on the main thread
* but block the main thread while the paint thread paints. Async OMTP doesn't block
* the main thread. Sync OMTP is only meant to be used as a debugging tool.
*/
bool
ClientPaintedLayer::PaintOffMainThread()
{
mContentClient->BeginAsyncPaint();
uint32_t flags = GetPaintFlags();
PaintState state = mContentClient->BeginPaintBuffer(this, flags);
if (!UpdatePaintRegion(state)) {
return false;
}
bool didUpdate = false;
RotatedContentBuffer::DrawIterator iter;
// Debug Protip: Change to BorrowDrawTargetForPainting if using sync OMTP.
while (RefPtr<CapturedPaintState> captureState =
mContentClient->BorrowDrawTargetForRecording(state, &iter))
{
DrawTarget* target = captureState->mTarget;
if (!target || !target->IsValid()) {
if (target) {
mContentClient->ReturnDrawTargetToBuffer(target);
}
continue;
}
RefPtr<DrawTargetCapture> captureDT =
Factory::CreateCaptureDrawTarget(target->GetBackendType(),
target->GetSize(),
target->GetFormat());
captureDT->SetTransform(captureState->mTargetTransform);
SetAntialiasingFlags(this, captureDT);
RefPtr<gfxContext> ctx = gfxContext::CreatePreservingTransformOrNull(captureDT);
MOZ_ASSERT(ctx); // already checked the target above
ClientManager()->GetPaintedLayerCallback()(this,
ctx,
iter.mDrawRegion,
iter.mDrawRegion,
state.mClip,
state.mRegionToInvalidate,
ClientManager()->GetPaintedLayerCallbackData());
ctx = nullptr;
captureState->mCapture = captureDT.forget();
PaintThread::Get()->PaintContents(captureState,
RotatedContentBuffer::PrepareDrawTargetForPainting);
mContentClient->ReturnDrawTargetToBuffer(target);
didUpdate = true;
}
mContentClient->EndPaint(nullptr);
if (didUpdate) {
UpdateContentClient(state);
}
return true;
}