Matrix4x4 ReadTransforms(const nsCSSValueList* aList, nsStyleContext* aContext, nsPresContext* aPresContext, RuleNodeCacheConditions& aConditions, TransformReferenceBox& aRefBox, float aAppUnitsPerMatrixUnit, bool* aContains3dTransform) { Matrix4x4 result; for (const nsCSSValueList* curr = aList; curr != nullptr; curr = curr->mNext) { const nsCSSValue &currElem = curr->mValue; if (currElem.GetUnit() != eCSSUnit_Function) { NS_ASSERTION(currElem.GetUnit() == eCSSUnit_None && !aList->mNext, "stream should either be a list of functions or a " "lone None"); continue; } NS_ASSERTION(currElem.GetArrayValue()->Count() >= 1, "Incoming function is too short!"); /* Read in a single transform matrix. */ MatrixForTransformFunction(result, currElem.GetArrayValue(), aContext, aPresContext, aConditions, aRefBox, aContains3dTransform); } float scale = float(nsPresContext::AppUnitsPerCSSPixel()) / aAppUnitsPerMatrixUnit; result.PreScale(1/scale, 1/scale, 1/scale); result.PostScale(scale, scale, scale); return result; }
gfx::IntRect ComputeBackdropCopyRect(const gfx::Rect& aRect, const gfx::IntRect& aClipRect, const gfx::Matrix4x4& aTransform, const gfx::IntRect& aRenderTargetRect, gfx::Matrix4x4* aOutTransform, gfx::Rect* aOutLayerQuad) { // Compute the clip. IntPoint rtOffset = aRenderTargetRect.TopLeft(); IntSize rtSize = aRenderTargetRect.Size(); gfx::IntRect renderBounds(0, 0, rtSize.width, rtSize.height); renderBounds.IntersectRect(renderBounds, aClipRect); renderBounds.MoveBy(rtOffset); // Apply the layer transform. RectDouble dest = aTransform.TransformAndClipBounds( RectDouble(aRect.x, aRect.y, aRect.width, aRect.height), RectDouble(renderBounds.x, renderBounds.y, renderBounds.width, renderBounds.height)); dest -= rtOffset; // Ensure we don't round out to -1, which trips up Direct3D. dest.IntersectRect(dest, RectDouble(0, 0, rtSize.width, rtSize.height)); if (aOutLayerQuad) { *aOutLayerQuad = Rect(dest.x, dest.y, dest.width, dest.height); } // Round out to integer. IntRect result; dest.RoundOut(); dest.ToIntRect(&result); // Create a transform from adjusted clip space to render target space, // translate it for the backdrop rect, then transform it into the backdrop's // uv-space. Matrix4x4 transform; transform.PostScale(rtSize.width, rtSize.height, 1.0); transform.PostTranslate(-result.x, -result.y, 0.0); transform.PostScale(1 / float(result.width), 1 / float(result.height), 1.0); *aOutTransform = transform; return result; }
Matrix4x4 HostLayer::GetShadowTransform() { Matrix4x4 transform = mShadowTransform; Layer* layer = GetLayer(); transform.PostScale(layer->GetPostXScale(), layer->GetPostYScale(), 1.0f); if (const ContainerLayer* c = layer->AsContainerLayer()) { transform.PreScale(c->GetPreXScale(), c->GetPreYScale(), 1.0f); } return transform; }
float LayerManagerComposite::ComputeRenderIntegrity() { // We only ever have incomplete rendering when progressive tiles are enabled. Layer* root = GetRoot(); if (!gfxPlatform::GetPlatform()->UseProgressivePaint() || !root) { return 1.f; } FrameMetrics rootMetrics = LayerMetricsWrapper::TopmostScrollableMetrics(root); if (!rootMetrics.IsScrollable()) { // The root may not have any scrollable metrics, in which case rootMetrics // will just be an empty FrameMetrics. Instead use the actual metrics from // the root layer. rootMetrics = LayerMetricsWrapper(root).Metrics(); } ParentLayerIntRect bounds = RoundedToInt(rootMetrics.GetCompositionBounds()); IntRect screenRect(bounds.x, bounds.y, bounds.width, bounds.height); float lowPrecisionMultiplier = 1.0f; float highPrecisionMultiplier = 1.0f; #ifdef MOZ_WIDGET_ANDROID // Use the transform on the primary scrollable layer and its FrameMetrics // to find out how much of the viewport the current displayport covers nsTArray<Layer*> rootScrollableLayers; GetRootScrollableLayers(rootScrollableLayers); if (rootScrollableLayers.Length() > 0) { // This is derived from the code in // AsyncCompositionManager::TransformScrollableLayer Layer* rootScrollable = rootScrollableLayers[0]; const FrameMetrics& metrics = LayerMetricsWrapper::TopmostScrollableMetrics(rootScrollable); Matrix4x4 transform = rootScrollable->GetEffectiveTransform(); transform.PostScale(metrics.GetPresShellResolution(), metrics.GetPresShellResolution(), 1); // Clip the screen rect to the document bounds Rect documentBounds = transform.TransformBounds(Rect(metrics.GetScrollableRect().x - metrics.GetScrollOffset().x, metrics.GetScrollableRect().y - metrics.GetScrollOffset().y, metrics.GetScrollableRect().width, metrics.GetScrollableRect().height)); documentBounds.RoundOut(); screenRect = screenRect.Intersect(IntRect(documentBounds.x, documentBounds.y, documentBounds.width, documentBounds.height)); // If the screen rect is empty, the user has scrolled entirely into // over-scroll and so we can be considered to have full integrity. if (screenRect.IsEmpty()) { return 1.0f; } // Work out how much of the critical display-port covers the screen bool hasLowPrecision = false; if (!metrics.GetCriticalDisplayPort().IsEmpty()) { hasLowPrecision = true; highPrecisionMultiplier = GetDisplayportCoverage(metrics.GetCriticalDisplayPort(), transform, screenRect); } // Work out how much of the display-port covers the screen if (!metrics.GetDisplayPort().IsEmpty()) { if (hasLowPrecision) { lowPrecisionMultiplier = GetDisplayportCoverage(metrics.GetDisplayPort(), transform, screenRect); } else { lowPrecisionMultiplier = highPrecisionMultiplier = GetDisplayportCoverage(metrics.GetDisplayPort(), transform, screenRect); } } } // If none of the screen is covered, we have zero integrity. if (highPrecisionMultiplier <= 0.0f && lowPrecisionMultiplier <= 0.0f) { return 0.0f; } #endif // MOZ_WIDGET_ANDROID nsIntRegion screenRegion(screenRect); nsIntRegion lowPrecisionScreenRegion(screenRect); Matrix4x4 transform; ComputeRenderIntegrityInternal(root, screenRegion, lowPrecisionScreenRegion, transform); if (!screenRegion.IsEqual(screenRect)) { // Calculate the area of the region. All rects in an nsRegion are // non-overlapping. float screenArea = screenRect.width * screenRect.height; float highPrecisionIntegrity = screenRegion.Area() / screenArea; float lowPrecisionIntegrity = 1.f; if (!lowPrecisionScreenRegion.IsEqual(screenRect)) { lowPrecisionIntegrity = lowPrecisionScreenRegion.Area() / screenArea; } return ((highPrecisionIntegrity * highPrecisionMultiplier) + (lowPrecisionIntegrity * lowPrecisionMultiplier)) / 2; } return 1.f; }