C++ nsIntRegion::GetBounds方法代码示例

nsIntRegion
ContentClientRemoteBuffer::GetUpdatedRegion(const nsIntRegion& aRegionToDraw,
                                            const nsIntRegion& aVisibleRegion,
                                            bool aDidSelfCopy)
{
  nsIntRegion updatedRegion;
  if (mIsNewBuffer || aDidSelfCopy) {
    // A buffer reallocation clears both buffers. The front buffer has all the
    // content by now, but the back buffer is still clear. Here, in effect, we
    // are saying to copy all of the pixels of the front buffer to the back.
    // Also when we self-copied in the buffer, the buffer space
    // changes and some changed buffer content isn't reflected in the
    // draw or invalidate region (on purpose!).  When this happens, we
    // need to read back the entire buffer too.
    updatedRegion = aVisibleRegion.GetBounds();
    mIsNewBuffer = false;
  } else {
    updatedRegion = aRegionToDraw;
  }

  NS_ASSERTION(BufferRect().Contains(aRegionToDraw.GetBounds()),
               "Update outside of buffer rect!");
  MOZ_ASSERT(mTextureClient, "should have a back buffer by now");

  return updatedRegion;
}

void
SimpleTiledLayerBuffer::PaintThebes(const nsIntRegion& aNewValidRegion,
                                    const nsIntRegion& aPaintRegion,
                                    LayerManager::DrawThebesLayerCallback aCallback,
                                    void* aCallbackData)
{
  mCallback = aCallback;
  mCallbackData = aCallbackData;

#ifdef GFX_TILEDLAYER_PREF_WARNINGS
  long start = PR_IntervalNow();
#endif

  // If this region is empty XMost() - 1 will give us a negative value.
  NS_ASSERTION(!aPaintRegion.GetBounds().IsEmpty(), "Empty paint region\n");

  PROFILER_LABEL("SimpleTiledLayerBuffer", "PaintThebesUpdate");

  Update(aNewValidRegion, aPaintRegion);

#ifdef GFX_TILEDLAYER_PREF_WARNINGS
  if (PR_IntervalNow() - start > 10) {
    const nsIntRect bounds = aPaintRegion.GetBounds();
    printf_stderr("Time to tile [%i, %i, %i, %i] -> %i\n", bounds.x, bounds.y, bounds.width, bounds.height, PR_IntervalNow() - start);
  }
#endif

  mLastPaintOpaque = mThebesLayer->CanUseOpaqueSurface();
  mCallback = nullptr;
  mCallbackData = nullptr;
}

already_AddRefed<gfxASurface>
ContentClientIncremental::GetUpdateSurface(BufferType aType,
                                           nsIntRegion& aUpdateRegion)
{
  nsIntRect rgnSize = aUpdateRegion.GetBounds();
  if (!mBufferRect.Contains(rgnSize)) {
    NS_ERROR("update outside of image");
    return nullptr;
  }
  SurfaceDescriptor desc;
  if (!mForwarder->AllocSurfaceDescriptor(gfxIntSize(rgnSize.width, rgnSize.height),
                                          mContentType,
                                          &desc)) {
    NS_WARNING("creating SurfaceDescriptor failed!");
    return nullptr;
  }

  nsRefPtr<gfxASurface> tmpASurface =
    ShadowLayerForwarder::OpenDescriptor(OPEN_READ_WRITE, desc);

  if (aType == BUFFER_BLACK) {
    MOZ_ASSERT(!IsSurfaceDescriptorValid(mUpdateDescriptor));
    mUpdateDescriptor = desc;
  } else {
    MOZ_ASSERT(!IsSurfaceDescriptorValid(mUpdateDescriptorOnWhite));
    MOZ_ASSERT(aType == BUFFER_WHITE);
    mUpdateDescriptorOnWhite = desc;
  }

  return tmpASurface.forget();
}

TemporaryRef<DrawTarget>
ContentClientIncremental::GetUpdateSurface(BufferType aType,
        const nsIntRegion& aUpdateRegion)
{
    nsIntRect rgnSize = aUpdateRegion.GetBounds();
    if (!mBufferRect.Contains(rgnSize)) {
        NS_ERROR("update outside of image");
        return nullptr;
    }
    SurfaceDescriptor desc;
    if (!mForwarder->AllocSurfaceDescriptor(rgnSize.Size().ToIntSize(),
                                            mContentType,
                                            &desc)) {
        NS_WARNING("creating SurfaceDescriptor failed!");
        Clear();
        return nullptr;
    }

    if (aType == BUFFER_BLACK) {
        MOZ_ASSERT(!IsSurfaceDescriptorValid(mUpdateDescriptor));
        mUpdateDescriptor = desc;
    } else {
        MOZ_ASSERT(!IsSurfaceDescriptorValid(mUpdateDescriptorOnWhite));
        MOZ_ASSERT(aType == BUFFER_WHITE);
        mUpdateDescriptorOnWhite = desc;
    }

    return GetDrawTargetForDescriptor(desc, gfx::BackendType::COREGRAPHICS);
}

bool
TextureImageEGL::DirectUpdate(gfxASurface* aSurf, const nsIntRegion& aRegion, const nsIntPoint& aFrom /* = nsIntPoint(0, 0) */)
{
    nsIntRect bounds = aRegion.GetBounds();

    nsIntRegion region;
    if (mTextureState != Valid) {
        bounds = nsIntRect(0, 0, mSize.width, mSize.height);
        region = nsIntRegion(bounds);
    } else {
        region = aRegion;
    }

    mTextureFormat =
      UploadSurfaceToTexture(mGLContext,
                             aSurf,
                             region,
                             mTexture,
                             mTextureState == Created,
                             bounds.TopLeft() + aFrom,
                             false);

    mTextureState = Valid;
    return true;
}

void
Compositor::DrawDiagnostics(DiagnosticFlags aFlags,
                            const nsIntRegion& aVisibleRegion,
                            const gfx::Rect& aClipRect,
                            const gfx::Matrix4x4& aTransform,
                            uint32_t aFlashCounter)
{
  if (!ShouldDrawDiagnostics(aFlags)) {
    return;
  }

  if (aVisibleRegion.GetNumRects() > 1) {
    nsIntRegionRectIterator screenIter(aVisibleRegion);

    while (const gfx::IntRect* rect = screenIter.Next())
    {
      DrawDiagnostics(aFlags | DiagnosticFlags::REGION_RECT,
                      IntRectToRect(*rect), aClipRect, aTransform,
                      aFlashCounter);
    }
  }

  DrawDiagnostics(aFlags, IntRectToRect(aVisibleRegion.GetBounds()),
                  aClipRect, aTransform, aFlashCounter);
}

/* static */ void
nsBaseWidget::debug_DumpPaintEvent(FILE *                aFileOut,
                                   nsIWidget *           aWidget,
                                   const nsIntRegion &   aRegion,
                                   const nsAutoCString & aWidgetName,
                                   int32_t               aWindowID)
{
  NS_ASSERTION(nullptr != aFileOut,"cmon, null output FILE");
  NS_ASSERTION(nullptr != aWidget,"cmon, the widget is null");

  if (!debug_GetCachedBoolPref("nglayout.debug.paint_dumping"))
    return;

  nsIntRect rect = aRegion.GetBounds();
  fprintf(aFileOut,
          "%4d PAINT      widget=%p name=%-12s id=0x%-6x bounds-rect=%3d,%-3d %3d,%-3d",
          _GetPrintCount(),
          (void *) aWidget,
          aWidgetName.get(),
          aWindowID,
          rect.x, rect.y, rect.width, rect.height
    );

  fprintf(aFileOut,"\n");
}

RenderViewMLGPU::RenderViewMLGPU(FrameBuilder* aBuilder,
                                 MLGRenderTarget* aTarget,
                                 const nsIntRegion& aInvalidRegion)
    : RenderViewMLGPU(aBuilder, nullptr) {
  mTarget = aTarget;
  mInvalidBounds = aInvalidRegion.GetBounds();

  // The clear region on the layer manager is the area that must be clear after
  // we finish drawing.
  mPostClearRegion = aBuilder->GetManager()->GetRegionToClear();

  // Clamp the post-clear region to the invalid bounds, since clears don't go
  // through the scissor rect if using ClearView.
  mPostClearRegion.AndWith(mInvalidBounds);

  // Since the post-clear will occlude everything, we include it in the final
  // opaque area.
  mOccludedRegion.OrWith(ViewAs<LayerPixel>(
      mPostClearRegion,
      PixelCastJustification::RenderTargetIsParentLayerForRoot));

  AL_LOG("RenderView %p root with invalid area %s, clear area %s\n", this,
         Stringify(mInvalidBounds).c_str(),
         Stringify(mPostClearRegion).c_str());
}

void
ContentClientDoubleBuffered::UpdateDestinationFrom(const RotatedBuffer& aSource,
                                                   const nsIntRegion& aUpdateRegion)
{
  nsRefPtr<gfxContext> destCtx =
    GetContextForQuadrantUpdate(aUpdateRegion.GetBounds(), BUFFER_BLACK);
  destCtx->SetOperator(gfxContext::OPERATOR_SOURCE);

  bool isClippingCheap = IsClippingCheap(destCtx, aUpdateRegion);
  if (isClippingCheap) {
    gfxUtils::ClipToRegion(destCtx, aUpdateRegion);
  }

  if (SupportsAzureContent()) {
    MOZ_ASSERT(!destCtx->IsCairo());

    if (destCtx->GetDrawTarget()->GetFormat() == FORMAT_B8G8R8A8) {
      destCtx->GetDrawTarget()->ClearRect(Rect(0, 0, mFrontBufferRect.width, mFrontBufferRect.height));
    }
    aSource.DrawBufferWithRotation(destCtx->GetDrawTarget(), BUFFER_BLACK);
  } else {
    aSource.DrawBufferWithRotation(destCtx, BUFFER_BLACK);
  }

  if (aSource.HaveBufferOnWhite()) {
    MOZ_ASSERT(HaveBufferOnWhite());
    nsRefPtr<gfxContext> destCtx =
      GetContextForQuadrantUpdate(aUpdateRegion.GetBounds(), BUFFER_WHITE);
    destCtx->SetOperator(gfxContext::OPERATOR_SOURCE);

    bool isClippingCheap = IsClippingCheap(destCtx, aUpdateRegion);
    if (isClippingCheap) {
      gfxUtils::ClipToRegion(destCtx, aUpdateRegion);
    }

    if (SupportsAzureContent()) {
      MOZ_ASSERT(!destCtx->IsCairo());

      if (destCtx->GetDrawTarget()->GetFormat() == FORMAT_B8G8R8A8) {
        destCtx->GetDrawTarget()->ClearRect(Rect(0, 0, mFrontBufferRect.width, mFrontBufferRect.height));
      }
      aSource.DrawBufferWithRotation(destCtx->GetDrawTarget(), BUFFER_WHITE);
    } else {
      aSource.DrawBufferWithRotation(destCtx, BUFFER_WHITE);
    }
  }
}

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
ContentClientDoubleBuffered::UpdateDestinationFrom(const RotatedBuffer& aSource,
                                                   const nsIntRegion& aUpdateRegion)
{
  nsRefPtr<gfxContext> destCtx =
    GetContextForQuadrantUpdate(aUpdateRegion.GetBounds(), BUFFER_BLACK);
  if (!destCtx) {
    return;
  }
  destCtx->SetOperator(gfxContext::OPERATOR_SOURCE);

  bool isClippingCheap = IsClippingCheap(destCtx, aUpdateRegion);
  if (isClippingCheap) {
    gfxUtils::ClipToRegion(destCtx, aUpdateRegion);
  }

  if (SupportsAzureContent()) {
    MOZ_ASSERT(!destCtx->IsCairo());
    aSource.DrawBufferWithRotation(destCtx->GetDrawTarget(), BUFFER_BLACK, 1.0, OP_SOURCE);
  } else {
    aSource.DrawBufferWithRotation(destCtx, BUFFER_BLACK);
  }

  if (aSource.HaveBufferOnWhite()) {
    MOZ_ASSERT(HaveBufferOnWhite());
    nsRefPtr<gfxContext> destCtx =
      GetContextForQuadrantUpdate(aUpdateRegion.GetBounds(), BUFFER_WHITE);
    destCtx->SetOperator(gfxContext::OPERATOR_SOURCE);

    bool isClippingCheap = IsClippingCheap(destCtx, aUpdateRegion);
    if (isClippingCheap) {
      gfxUtils::ClipToRegion(destCtx, aUpdateRegion);
    }

    if (SupportsAzureContent()) {
      MOZ_ASSERT(!destCtx->IsCairo());
      aSource.DrawBufferWithRotation(destCtx->GetDrawTarget(), BUFFER_WHITE, 1.0, OP_SOURCE);
    } else {
      aSource.DrawBufferWithRotation(destCtx, BUFFER_WHITE);
    }
  }
}

SurfaceFormat
UploadSurfaceToTexture(GLContext* gl,
                       gfxASurface *aSurface,
                       const nsIntRegion& aDstRegion,
                       GLuint& aTexture,
                       bool aOverwrite,
                       const nsIntPoint& aSrcPoint,
                       bool aPixelBuffer,
                       GLenum aTextureUnit,
                       GLenum aTextureTarget)
{

    nsRefPtr<gfxImageSurface> imageSurface = aSurface->GetAsImageSurface();
    unsigned char* data = nullptr;

    if (!imageSurface ||
        (imageSurface->Format() != gfxImageFormatARGB32 &&
         imageSurface->Format() != gfxImageFormatRGB24 &&
         imageSurface->Format() != gfxImageFormatRGB16_565 &&
         imageSurface->Format() != gfxImageFormatA8)) {
        // We can't get suitable pixel data for the surface, make a copy
        nsIntRect bounds = aDstRegion.GetBounds();
        imageSurface =
          new gfxImageSurface(gfxIntSize(bounds.width, bounds.height),
                              gfxImageFormatARGB32);

        nsRefPtr<gfxContext> context = new gfxContext(imageSurface);

        context->Translate(-gfxPoint(aSrcPoint.x, aSrcPoint.y));
        context->SetSource(aSurface);
        context->Paint();
        data = imageSurface->Data();
        NS_ASSERTION(!aPixelBuffer,
                     "Must be using an image compatible surface with pixel buffers!");
    } else {
        // If a pixel buffer is bound the data pointer parameter is relative
        // to the start of the data block.
        if (!aPixelBuffer) {
              data = imageSurface->Data();
        }
        data += DataOffset(aSrcPoint, imageSurface->Stride(),
                           imageSurface->Format());
    }

    MOZ_ASSERT(imageSurface);
    imageSurface->Flush();

    return UploadImageDataToTexture(gl,
                                    data,
                                    imageSurface->Stride(),
                                    imageSurface->Format(),
                                    aDstRegion, aTexture, aOverwrite,
                                    aPixelBuffer, aTextureUnit, aTextureTarget);
}

void
ContentClientDoubleBuffered::UpdateDestinationFrom(const RotatedBuffer& aSource,
                                                   const nsIntRegion& aUpdateRegion)
{
  DrawIterator iter;
  while (DrawTarget* destDT =
    BorrowDrawTargetForQuadrantUpdate(aUpdateRegion.GetBounds(), BUFFER_BLACK, &iter)) {
    bool isClippingCheap = IsClippingCheap(destDT, iter.mDrawRegion);
    if (isClippingCheap) {
      gfxUtils::ClipToRegion(destDT, iter.mDrawRegion);
    }

    aSource.DrawBufferWithRotation(destDT, BUFFER_BLACK, 1.0, CompositionOp::OP_SOURCE);
    if (isClippingCheap) {
      destDT->PopClip();
    }
    // Flush the destination before the sources become inaccessible (Unlock).
    destDT->Flush();
    ReturnDrawTargetToBuffer(destDT);
  }

  if (aSource.HaveBufferOnWhite()) {
    MOZ_ASSERT(HaveBufferOnWhite());
    DrawIterator whiteIter;
    while (DrawTarget* destDT =
      BorrowDrawTargetForQuadrantUpdate(aUpdateRegion.GetBounds(), BUFFER_WHITE, &whiteIter)) {
      bool isClippingCheap = IsClippingCheap(destDT, whiteIter.mDrawRegion);
      if (isClippingCheap) {
        gfxUtils::ClipToRegion(destDT, whiteIter.mDrawRegion);
      }

      aSource.DrawBufferWithRotation(destDT, BUFFER_WHITE, 1.0, CompositionOp::OP_SOURCE);
      if (isClippingCheap) {
        destDT->PopClip();
      }
      // Flush the destination before the sources become inaccessible (Unlock).
      destDT->Flush();
      ReturnDrawTargetToBuffer(destDT);
    }
  }
}

void
TiledLayerBufferComposite::Upload(const BasicTiledLayerBuffer* aMainMemoryTiledBuffer,
                                  const nsIntRegion& aNewValidRegion,
                                  const nsIntRegion& aInvalidateRegion,
                                  const gfxSize& aResolution)
{
#ifdef GFX_TILEDLAYER_PREF_WARNINGS
  printf_stderr("Upload %i, %i, %i, %i\n", aInvalidateRegion.GetBounds().x, aInvalidateRegion.GetBounds().y, aInvalidateRegion.GetBounds().width, aInvalidateRegion.GetBounds().height);
  long start = PR_IntervalNow();
#endif

  mFrameResolution = aResolution;
  mMainMemoryTiledBuffer = aMainMemoryTiledBuffer;
  Update(aNewValidRegion, aInvalidateRegion);
  mMainMemoryTiledBuffer = nullptr;
#ifdef GFX_TILEDLAYER_PREF_WARNINGS
  if (PR_IntervalNow() - start > 10) {
    printf_stderr("Time to upload %i\n", PR_IntervalNow() - start);
  }
#endif
}

void
TextureImageEGL::GetUpdateRegion(nsIntRegion& aForRegion)
{
    if (mTextureState != Valid) {
        // if the texture hasn't been initialized yet, force the
        // client to paint everything
        aForRegion = nsIntRect(nsIntPoint(0, 0), gfx::ThebesIntSize(mSize));
    }

    // We can only draw a rectangle, not subregions due to
    // the way that our texture upload functions work.  If
    // needed, we /could/ do multiple texture uploads if we have
    // non-overlapping rects, but that's a tradeoff.
    aForRegion = nsIntRegion(aForRegion.GetBounds());
}