/**
* Returns a rectangle of content painted opaquely by aLayer. Very consertative;
* bails by returning an empty rect in any tricky situations.
*/
static nsIntRect
GetOpaqueRect(Layer* aLayer)
{
nsIntRect result;
// Just bail if there's anything difficult to handle.
if (!aLayer->GetEffectiveTransform().IsIdentity() ||
aLayer->GetEffectiveOpacity() != 1.0f ||
aLayer->GetMaskLayer()) {
return result;
}
if (aLayer->GetContentFlags() & Layer::CONTENT_OPAQUE) {
result = aLayer->GetEffectiveVisibleRegion().GetLargestRectangle();
} else {
// Drill down into RefLayers because that's what we particularly care about;
// layer construction for aLayer will not have known about the opaqueness
// of any RefLayer subtrees.
RefLayer* refLayer = aLayer->AsRefLayer();
if (refLayer && refLayer->GetFirstChild()) {
result = GetOpaqueRect(refLayer->GetFirstChild());
}
}
const nsIntRect* clipRect = aLayer->GetEffectiveClipRect();
if (clipRect) {
result.IntersectRect(result, *clipRect);
}
return result;
}
void Ctrl::GatherTransparentAreas(Vector<Rect>& area, SystemDraw& w, Rect r, const Rect& clip)
{
GuiLock __;
LTIMING("GatherTransparentAreas");
Point off = r.TopLeft();
Point viewpos = off + GetView().TopLeft();
r.Inflate(overpaint);
Rect notr = GetVoidRect();
if(notr.IsEmpty())
notr = GetOpaqueRect();
notr += viewpos;
if(!IsShown() || r.IsEmpty() || !clip.Intersects(r) || !w.IsPainting(r))
return;
if(notr.IsEmpty())
CombineArea(area, r & clip);
else {
if(notr != r) {
CombineArea(area, clip & Rect(r.left, r.top, notr.left, r.bottom));
CombineArea(area, clip & Rect(notr.right, r.top, r.right, r.bottom));
CombineArea(area, clip & Rect(notr.left, r.top, notr.right, notr.top));
CombineArea(area, clip & Rect(notr.left, notr.bottom, notr.right, r.bottom));
}
for(Ctrl *q = firstchild; q; q = q->next) {
Point qoff = q->InView() ? viewpos : off;
Rect qr = q->GetRect() + qoff;
if(clip.Intersects(qr))
q->GatherTransparentAreas(area, w, qr, clip);
}
}
}
bool Ctrl::PaintOpaqueAreas(SystemDraw& w, const Rect& r, const Rect& clip, bool nochild)
{
GuiLock __;
LTIMING("PaintOpaqueAreas");
if(!IsShown() || r.IsEmpty() || !r.Intersects(clip) || !w.IsPainting(r))
return true;
Point off = r.TopLeft();
Point viewpos = off + GetView().TopLeft();
if(backpaint == EXCLUDEPAINT)
return w.ExcludeClip(r);
Rect cview = clip & (GetView() + off);
for(Ctrl *q = lastchild; q; q = q->prev)
if(!q->PaintOpaqueAreas(w, q->GetRect() + (q->InView() ? viewpos : off),
q->InView() ? cview : clip))
return false;
if(nochild && (lastchild || GetNext()))
return true;
Rect opaque = (GetOpaqueRect() + viewpos) & clip;
if(opaque.IsEmpty())
return true;
#ifdef SYSTEMDRAW
if(backpaint == FULLBACKPAINT && !dynamic_cast<BackDraw *>(&w))
#else
if(backpaint == FULLBACKPAINT && !w.IsBack())
#endif
{
ShowRepaintRect(w, opaque, LtRed());
BackDraw bw;
bw.Create(w, opaque.GetSize());
bw.Offset(viewpos - opaque.TopLeft());
bw.SetPaintingDraw(w, opaque.TopLeft());
{
LEVELCHECK(bw, this);
Paint(bw);
PaintCaret(bw);
}
bw.Put(w, opaque.TopLeft());
}
else {
w.Clip(opaque);
ShowRepaintRect(w, opaque, Green());
w.Offset(viewpos);
{
LEVELCHECK(w, this);
Paint(w);
PaintCaret(w);
}
w.End();
w.End();
}
LLOG("Exclude " << opaque);
return w.ExcludeClip(opaque);
}
already_AddRefed<gfxImageSurface>
gfxQPainterSurface::GetAsImageSurface()
{
if (!mSurfaceValid)
return nullptr;
cairo_surface_t *isurf = cairo_qt_surface_get_image(CairoSurface());
if (!isurf)
return nullptr;
assert(cairo_surface_get_type(isurf) == CAIRO_SURFACE_TYPE_IMAGE);
RefPtr<gfxImageSurface> asurf = new gfxImageSurface(isurf);
asurf->SetOpaqueRect(GetOpaqueRect());
return asurf.forget();
}
already_AddRefed<gfxImageSurface>
gfxQuartzImageSurface::GetAsImageSurface()
{
if (!mSurfaceValid)
return nullptr;
cairo_surface_t *isurf = cairo_quartz_image_surface_get_image (CairoSurface());
if (!isurf) {
NS_WARNING ("Couldn't obtain an image surface from a QuartzImageSurface?!");
return nullptr;
}
RefPtr<gfxImageSurface> result = gfxASurface::Wrap(isurf).downcast<gfxImageSurface>();
result->SetOpaqueRect(GetOpaqueRect());
return result.forget();
}
already_AddRefed<gfxImageSurface> gfxQuartzSurface::GetAsImageSurface()
{
cairo_surface_t *surface = cairo_quartz_surface_get_image(mSurface);
if (!surface || cairo_surface_status(surface))
return nullptr;
nsRefPtr<gfxASurface> img = Wrap(surface);
// cairo_quartz_surface_get_image returns a referenced image, and thebes
// shares the refcounts of Cairo surfaces. However, Wrap also adds a
// reference to the image. We need to remove one of these references
// explicitly so we don't leak.
img->Release();
img->SetOpaqueRect(GetOpaqueRect());
return img.forget().downcast<gfxImageSurface>();
}
already_AddRefed<gfxImageSurface>
gfxWindowsSurface::GetAsImageSurface()
{
if (!mSurfaceValid) {
NS_WARNING ("GetImageSurface on an invalid (null) surface; who's calling this without checking for surface errors?");
return nullptr;
}
NS_ASSERTION(CairoSurface() != nullptr, "CairoSurface() shouldn't be nullptr when mSurfaceValid is TRUE!");
cairo_surface_t *isurf = cairo_win32_surface_get_image(CairoSurface());
if (!isurf)
return nullptr;
RefPtr<gfxImageSurface> result = gfxASurface::Wrap(isurf).downcast<gfxImageSurface>();
result->SetOpaqueRect(GetOpaqueRect());
return result.forget();
}
template<class ContainerT> void
ContainerRender(ContainerT* aContainer,
LayerManagerComposite* aManager,
const nsIntRect& aClipRect)
{
/**
* Setup our temporary surface for rendering the contents of this container.
*/
RefPtr<CompositingRenderTarget> surface;
Compositor* compositor = aManager->GetCompositor();
RefPtr<CompositingRenderTarget> previousTarget = compositor->GetCurrentRenderTarget();
nsIntRect visibleRect = aContainer->GetEffectiveVisibleRegion().GetBounds();
aContainer->mSupportsComponentAlphaChildren = false;
float opacity = aContainer->GetEffectiveOpacity();
bool needsSurface = aContainer->UseIntermediateSurface();
if (needsSurface) {
SurfaceInitMode mode = INIT_MODE_CLEAR;
bool surfaceCopyNeeded = false;
gfx::IntRect surfaceRect = gfx::IntRect(visibleRect.x, visibleRect.y,
visibleRect.width, visibleRect.height);
gfx::IntPoint sourcePoint = gfx::IntPoint(visibleRect.x, visibleRect.y);
// we're about to create a framebuffer backed by textures to use as an intermediate
// surface. What to do if its size (as given by framebufferRect) would exceed the
// maximum texture size supported by the GL? The present code chooses the compromise
// of just clamping the framebuffer's size to the max supported size.
// This gives us a lower resolution rendering of the intermediate surface (children layers).
// See bug 827170 for a discussion.
int32_t maxTextureSize = compositor->GetMaxTextureSize();
surfaceRect.width = std::min(maxTextureSize, surfaceRect.width);
surfaceRect.height = std::min(maxTextureSize, surfaceRect.height);
if (aContainer->GetEffectiveVisibleRegion().GetNumRects() == 1 &&
(aContainer->GetContentFlags() & Layer::CONTENT_OPAQUE))
{
// don't need a background, we're going to paint all opaque stuff
aContainer->mSupportsComponentAlphaChildren = true;
mode = INIT_MODE_NONE;
} else {
const gfx3DMatrix& transform3D = aContainer->GetEffectiveTransform();
gfxMatrix transform;
// If we have an opaque ancestor layer, then we can be sure that
// all the pixels we draw into are either opaque already or will be
// covered by something opaque. Otherwise copying up the background is
// not safe.
if (HasOpaqueAncestorLayer(aContainer) &&
transform3D.Is2D(&transform) && !transform.HasNonIntegerTranslation()) {
surfaceCopyNeeded = gfxPlatform::ComponentAlphaEnabled();
sourcePoint.x += transform.x0;
sourcePoint.y += transform.y0;
aContainer->mSupportsComponentAlphaChildren
= gfxPlatform::ComponentAlphaEnabled();
}
}
sourcePoint -= compositor->GetCurrentRenderTarget()->GetOrigin();
if (surfaceCopyNeeded) {
surface = compositor->CreateRenderTargetFromSource(surfaceRect, previousTarget, sourcePoint);
} else {
surface = compositor->CreateRenderTarget(surfaceRect, mode);
}
if (!surface) {
return;
}
compositor->SetRenderTarget(surface);
} else {
surface = previousTarget;
aContainer->mSupportsComponentAlphaChildren = (aContainer->GetContentFlags() & Layer::CONTENT_OPAQUE) ||
(aContainer->GetParent() && aContainer->GetParent()->SupportsComponentAlphaChildren());
}
nsAutoTArray<Layer*, 12> children;
aContainer->SortChildrenBy3DZOrder(children);
/**
* Render this container's contents.
*/
for (uint32_t i = 0; i < children.Length(); i++) {
LayerComposite* layerToRender = static_cast<LayerComposite*>(children.ElementAt(i)->ImplData());
if (layerToRender->GetLayer()->GetEffectiveVisibleRegion().IsEmpty() &&
!layerToRender->GetLayer()->AsContainerLayer()) {
continue;
}
if (i + 1 < children.Length() &&
layerToRender->GetLayer()->GetEffectiveTransform().IsIdentity()) {
LayerComposite* nextLayer = static_cast<LayerComposite*>(children.ElementAt(i + 1)->ImplData());
nsIntRect nextLayerOpaqueRect;
if (nextLayer && nextLayer->GetLayer()) {
nextLayerOpaqueRect = GetOpaqueRect(nextLayer->GetLayer());
}
if (!nextLayerOpaqueRect.IsEmpty()) {
nsIntRegion visibleRegion;
visibleRegion.Sub(layerToRender->GetShadowVisibleRegion(), nextLayerOpaqueRect);
layerToRender->SetShadowVisibleRegion(visibleRegion);
if (visibleRegion.IsEmpty()) {
continue;
}
}
}
nsIntRect clipRect = layerToRender->GetLayer()->
CalculateScissorRect(aClipRect, &aManager->GetWorldTransform());
if (clipRect.IsEmpty()) {
continue;
}
if (layerToRender->HasLayerBeenComposited()) {
// Composer2D will compose this layer so skip GPU composition
// this time & reset composition flag for next composition phase
layerToRender->SetLayerComposited(false);
} else {
layerToRender->RenderLayer(clipRect);
}
// invariant: our GL context should be current here, I don't think we can
// assert it though
}
if (needsSurface) {
// Unbind the current surface and rebind the previous one.
#ifdef MOZ_DUMP_PAINTING
if (gfxUtils::sDumpPainting) {
nsRefPtr<gfxImageSurface> surf = surface->Dump(aManager->GetCompositor());
WriteSnapshotToDumpFile(aContainer, surf);
}
#endif
compositor->SetRenderTarget(previousTarget);
EffectChain effectChain;
LayerManagerComposite::AutoAddMaskEffect autoMaskEffect(aContainer->GetMaskLayer(),
effectChain,
!aContainer->GetTransform().CanDraw2D());
effectChain.mPrimaryEffect = new EffectRenderTarget(surface);
gfx::Matrix4x4 transform;
ToMatrix4x4(aContainer->GetEffectiveTransform(), transform);
gfx::Rect rect(visibleRect.x, visibleRect.y, visibleRect.width, visibleRect.height);
gfx::Rect clipRect(aClipRect.x, aClipRect.y, aClipRect.width, aClipRect.height);
aManager->GetCompositor()->DrawQuad(rect, clipRect, effectChain, opacity,
transform);
}
if (aContainer->GetFrameMetrics().IsScrollable()) {
gfx::Matrix4x4 transform;
ToMatrix4x4(aContainer->GetEffectiveTransform(), transform);
const FrameMetrics& frame = aContainer->GetFrameMetrics();
LayerRect layerBounds = ScreenRect(frame.mCompositionBounds) * ScreenToLayerScale(1.0);
gfx::Rect rect(layerBounds.x, layerBounds.y, layerBounds.width, layerBounds.height);
gfx::Rect clipRect(aClipRect.x, aClipRect.y, aClipRect.width, aClipRect.height);
aManager->GetCompositor()->DrawDiagnostics(DIAGNOSTIC_CONTAINER,
rect, clipRect,
transform);
}
}
