Quellcode-Bibliothek BlobSurfaceProvider.cpp Sprache: C

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "BlobSurfaceProvider.h"
#include "AutoRestoreSVGState.h"
#include "ImageRegion.h"
#include "SVGDocumentWrapper.h"
#include "mozilla/PresShell.h"
#include "mozilla/dom/Document.h"
#include "mozilla/gfx/2D.h"
#include "mozilla/layers/IpcResourceUpdateQueue.h"
#include "mozilla/layers/WebRenderBridgeChild.h"
#include "mozilla/layers/WebRenderDrawEventRecorder.h"

using namespace mozilla::gfx;
using namespace mozilla::layers;

namespace mozilla::image {

BlobSurfaceProvider::BlobSurfaceProvider(
    const ImageKey aImageKey, const SurfaceKey& aSurfaceKey,
    image::SVGDocumentWrapper* aSVGDocumentWrapper, uint32_t aImageFlags)
    : ISurfaceProvider(aImageKey, aSurfaceKey,
                       AvailabilityState::StartAvailable()),
      mSVGDocumentWrapper(aSVGDocumentWrapper),
      mImageFlags(aImageFlags) {
  MOZ_ASSERT(mSVGDocumentWrapper);
  MOZ_ASSERT(aImageFlags & imgIContainer::FLAG_RECORD_BLOB);
}

BlobSurfaceProvider::~BlobSurfaceProvider() {
  if (NS_IsMainThread()) {
    DestroyKeys(mKeys);
    return;
  }

  NS_ReleaseOnMainThread("SourceSurfaceBlobImage::mSVGDocumentWrapper",
                         mSVGDocumentWrapper.forget());
  NS_DispatchToMainThread(
      NS_NewRunnableFunction("SourceSurfaceBlobImage::DestroyKeys",
                             [keys = std::move(mKeys)] { DestroyKeys(keys); }));
}

/* static */ void BlobSurfaceProvider::DestroyKeys(
    const AutoTArray<BlobImageKeyData, 1>& aKeys) {
  for (const auto& entry : aKeys) {
    if (entry.mManager->IsDestroyed()) {
      continue;
    }

    WebRenderBridgeChild* wrBridge = entry.mManager->WrBridge();
    if (!wrBridge || !wrBridge->MatchesNamespace(entry.mBlobKey)) {
      continue;
    }

    entry.mManager->GetRenderRootStateManager()->AddBlobImageKeyForDiscard(
        entry.mBlobKey);
  }
}

nsresult BlobSurfaceProvider::UpdateKey(
    layers::RenderRootStateManager* aManager,
    wr::IpcResourceUpdateQueue& aResources, wr::ImageKey& aKey) {
  MOZ_ASSERT(NS_IsMainThread());

  layers::WebRenderLayerManager* manager = aManager->LayerManager();
  MOZ_ASSERT(manager);

  Maybe<wr::BlobImageKey> key;
  auto i = mKeys.Length();
  while (i > 0) {
    --i;
    BlobImageKeyData& entry = mKeys[i];
    if (entry.mManager->IsDestroyed()) {
      mKeys.RemoveElementAt(i);
    } else if (entry.mManager == manager) {
      WebRenderBridgeChild* wrBridge = manager->WrBridge();
      MOZ_ASSERT(wrBridge);

      bool ownsKey = wrBridge->MatchesNamespace(entry.mBlobKey);
      if (ownsKey && !entry.mDirty) {
        key.emplace(entry.mBlobKey);
        continue;
      }

      // Even if the manager is the same, its underlying WebRenderBridgeChild
      // can change state. Either our namespace differs, and our old key has
      // already been discarded, or the blob has changed. Either way, we need
      // to rerecord it.
      auto newEntry = RecordDrawing(manager, aResources,
                                    ownsKey ? Some(entry.mBlobKey) : Nothing());
      if (!newEntry) {
        if (ownsKey) {
          aManager->AddBlobImageKeyForDiscard(entry.mBlobKey);
        }
        mKeys.RemoveElementAt(i);
        continue;
      }

      key.emplace(newEntry.ref().mBlobKey);
      entry = std::move(newEntry.ref());
      MOZ_ASSERT(!entry.mDirty);
    }
  }

  // We didn't find an entry. Attempt to record the blob with a new key.
  if (!key) {
    auto newEntry = RecordDrawing(manager, aResources, Nothing());
    if (newEntry) {
      key.emplace(newEntry.ref().mBlobKey);
      mKeys.AppendElement(std::move(newEntry.ref()));
    }
  }

  if (key) {
    aKey = wr::AsImageKey(key.value());
    return NS_OK;
  }

  return NS_ERROR_FAILURE;
}

void BlobSurfaceProvider::InvalidateSurface() {
  MOZ_ASSERT(NS_IsMainThread());

  auto i = mKeys.Length();
  while (i > 0) {
    --i;
    BlobImageKeyData& entry = mKeys[i];
    if (entry.mManager->IsDestroyed()) {
      mKeys.RemoveElementAt(i);
    } else {
      entry.mDirty = true;
    }
  }
}

Maybe<BlobImageKeyData> BlobSurfaceProvider::RecordDrawing(
    WebRenderLayerManager* aManager, wr::IpcResourceUpdateQueue& aResources,
    Maybe<wr::BlobImageKey> aBlobKey) {
  MOZ_ASSERT(!aManager->IsDestroyed());

  if (mSVGDocumentWrapper->IsDrawing()) {
    return Nothing();
  }

  // This is either our first pass, or we have a stale key requiring us to
  // re-record the SVG image draw commands.
  auto* rootManager = aManager->GetRenderRootStateManager();
  auto* wrBridge = aManager->WrBridge();

  const auto& size = GetSurfaceKey().Size();
  const auto& region = GetSurfaceKey().Region();
  const auto& svgContext = GetSurfaceKey().SVGContext();

  IntRect imageRect = region ? region->Rect() : IntRect(IntPoint(0, 0), size);
  IntRect imageRectOrigin = imageRect - imageRect.TopLeft();

  std::vector<RefPtr<ScaledFont>> fonts;
  bool validFonts = true;
  RefPtr<WebRenderDrawEventRecorder> recorder =
      MakeAndAddRef<WebRenderDrawEventRecorder>(
          [&](MemStream& aStream,
              std::vector<RefPtr<ScaledFont>>& aScaledFonts) {
            auto count = aScaledFonts.size();
            aStream.write((const char*)&count, sizeof(count));

            for (auto& scaled : aScaledFonts) {
              Maybe<wr::FontInstanceKey> key =
                  wrBridge->GetFontKeyForScaledFont(scaled, aResources);
              if (key.isNothing()) {
                validFonts = false;
                break;
              }
              BlobFont font = {key.value(), scaled};
              aStream.write((const char*)&font, sizeof(font));
            }

            fonts = std::move(aScaledFonts);
          });

  RefPtr<DrawTarget> dummyDt =
      gfxPlatform::GetPlatform()->ScreenReferenceDrawTarget();
  RefPtr<DrawTarget> dt =
      Factory::CreateRecordingDrawTarget(recorder, dummyDt, imageRectOrigin);

  if (!dt || !dt->IsValid()) {
    return Nothing();
  }

  bool contextPaint = svgContext.GetContextPaint();

  float animTime = (GetSurfaceKey().Playback() == PlaybackType::eStatic)
                       ? 0.0f
                       : mSVGDocumentWrapper->GetCurrentTimeAsFloat();

  IntSize viewportSize = size;
  if (auto cssViewportSize = svgContext.GetViewportSize()) {
    // XXX losing unit
    viewportSize.SizeTo(cssViewportSize->width, cssViewportSize->height);
  }

  {
    // Get (& sanity-check) the helper-doc's presShell
    RefPtr<PresShell> presShell = mSVGDocumentWrapper->GetPresShell();
    MOZ_ASSERT(presShell, "GetPresShell returned null for an SVG image?");

    nsPresContext* presContext = presShell->GetPresContext();
    MOZ_ASSERT(presContext, "pres shell w/out pres context");

    auto* doc = presShell->GetDocument();
    [[maybe_unused]] nsIURI* uri = doc ? doc->GetDocumentURI() : nullptr;
    AUTO_PROFILER_LABEL_DYNAMIC_NSCSTRING(
        "SVG Image recording", GRAPHICS,
        nsPrintfCString("(%d,%d) %dx%d from %dx%d %s", imageRect.x, imageRect.y,
                        imageRect.width, imageRect.height, size.width,
                        size.height,
                        uri ? uri->GetSpecOrDefault().get() : "N/A"));

    AutoRestoreSVGState autoRestore(svgContext, animTime, mSVGDocumentWrapper,
                                    contextPaint);

    mSVGDocumentWrapper->UpdateViewportBounds(viewportSize);
    mSVGDocumentWrapper->FlushImageTransformInvalidation();

    gfxContext ctx(dt);

    nsRect svgRect;
    auto auPerDevPixel = presContext->AppUnitsPerDevPixel();
    if (size != viewportSize) {
      auto scaleX = double(size.width) / viewportSize.width;
      auto scaleY = double(size.height) / viewportSize.height;
      ctx.SetMatrix(Matrix::Scaling(float(scaleX), float(scaleY)));

      auto scaledVisibleRect = IntRectToRect(imageRect);
      scaledVisibleRect.Scale(float(auPerDevPixel / scaleX),
                              float(auPerDevPixel / scaleY));
      scaledVisibleRect.Round();
      svgRect.SetRect(
          int32_t(scaledVisibleRect.x), int32_t(scaledVisibleRect.y),
          int32_t(scaledVisibleRect.width), int32_t(scaledVisibleRect.height));
    } else {
      auto scaledVisibleRect(imageRect);
      scaledVisibleRect.Scale(auPerDevPixel);
      svgRect.SetRect(scaledVisibleRect.x, scaledVisibleRect.y,
                      scaledVisibleRect.width, scaledVisibleRect.height);
    }

    RenderDocumentFlags renderDocFlags =
        RenderDocumentFlags::IgnoreViewportScrolling;
    if (!(mImageFlags & imgIContainer::FLAG_SYNC_DECODE)) {
      renderDocFlags |= RenderDocumentFlags::AsyncDecodeImages;
    }
    if (mImageFlags & imgIContainer::FLAG_HIGH_QUALITY_SCALING) {
      renderDocFlags |= RenderDocumentFlags::UseHighQualityScaling;
    }

    presShell->RenderDocument(svgRect, renderDocFlags,
                              NS_RGBA(0, 0, 0, 0),  // transparent
                              &ctx);
  }

  recorder->FlushItem(imageRectOrigin);
  recorder->Finish();

  if (!validFonts) {
    gfxCriticalNote << "Failed serializing fonts for blob vector image";
    return Nothing();
  }

  Range<uint8_t> bytes((uint8_t*)recorder->mOutputStream.mData,
                       recorder->mOutputStream.mLength);
  wr::BlobImageKey key = aBlobKey
                             ? aBlobKey.value()
                             : wr::BlobImageKey{wrBridge->GetNextImageKey()};
  wr::ImageDescriptor descriptor(imageRect.Size(), 0, SurfaceFormat::OS_RGBA,
                                 wr::OpacityType::HasAlphaChannel);

  auto visibleRect = ImageIntRect::FromUnknownRect(imageRectOrigin);
  if (aBlobKey) {
    if (!aResources.UpdateBlobImage(key, descriptor, bytes, visibleRect,
                                    visibleRect)) {
      return Nothing();
    }
  } else if (!aResources.AddBlobImage(key, descriptor, bytes, visibleRect)) {
    return Nothing();
  }

  DrawEventRecorderPrivate::ExternalSurfacesHolder externalSurfaces;
  recorder->TakeExternalSurfaces(externalSurfaces);

  for (auto& entry : externalSurfaces) {
    // While we don't use the image key with the surface, because the blob image
    // renderer doesn't have easy access to the resource set, we still want to
    // ensure one is generated. That will ensure the surface remains alive until
    // at least the last epoch which the blob image could be used in.
    wr::ImageKey key = {};
    DebugOnly<nsresult> rv = SharedSurfacesChild::Share(
        entry.mSurface, rootManager, aResources, key);
    MOZ_ASSERT(rv.value != NS_ERROR_NOT_IMPLEMENTED);
  }

  return Some(BlobImageKeyData(aManager, key, std::move(fonts),
                               std::move(externalSurfaces)));
}

}  // namespace mozilla::image

quality90%

¤ Die Informationen auf dieser Webseite wurden nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit, noch Qualität der bereit gestellten Informationen zugesichert.0.14Bemerkung: (vorverarbeitet) ¤

*Bot Zugriff

Wurzel

Suchen

Beweissystem der NASA

Beweissystem Isabelle

NIST Cobol Testsuite

Cephes Mathematical Library

Wiener Entwicklungsmethode

Haftungshinweis

Die Informationen auf dieser Webseite wurden nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit, noch Qualität der bereit gestellten Informationen zugesichert.

Bemerkung:

Die farbliche Syntaxdarstellung ist noch experimentell.