示例#1
0
bool nsWindow::OnPaint(HDC aDC, uint32_t aNestingLevel)
{
  // We never have reentrant paint events, except when we're running our RPC
  // windows event spin loop. If we don't trap for this, we'll try to paint,
  // but view manager will refuse to paint the surface, resulting is black
  // flashes on the plugin rendering surface.
  if (mozilla::ipc::RPCChannel::IsSpinLoopActive() && mPainting)
    return false;

  if (mWindowType == eWindowType_plugin) {

    /**
     * After we CallUpdateWindow to the child, occasionally a WM_PAINT message
     * is posted to the parent event loop with an empty update rect. Do a
     * dummy paint so that Windows stops dispatching WM_PAINT in an inifinite
     * loop. See bug 543788.
     */
    RECT updateRect;
    if (!GetUpdateRect(mWnd, &updateRect, FALSE) ||
        (updateRect.left == updateRect.right &&
         updateRect.top == updateRect.bottom)) {
      PAINTSTRUCT ps;
      BeginPaint(mWnd, &ps);
      EndPaint(mWnd, &ps);
      return true;
    }

    PluginInstanceParent* instance = reinterpret_cast<PluginInstanceParent*>(
      ::GetPropW(mWnd, L"PluginInstanceParentProperty"));
    if (instance) {
      unused << instance->CallUpdateWindow();
    } else {
      // We should never get here since in-process plugins should have
      // subclassed our HWND and handled WM_PAINT, but in some cases that
      // could fail. Return without asserting since it's not our fault.
      NS_WARNING("Plugin failed to subclass our window");
    }

    ValidateRect(mWnd, NULL);
    return true;
  }

  // Do an early async composite so that we at least have something on screen
  // in the right place, even if the content is out of date.
  if (GetLayerManager()->GetBackendType() == LAYERS_CLIENT &&
      mCompositorParent) {
    mCompositorParent->ScheduleRenderOnCompositorThread();
  }

  nsIWidgetListener* listener = GetPaintListener();
  if (listener) {
    listener->WillPaintWindow(this);
  }
  // Re-get the listener since the will paint notification may have killed it.
  listener = GetPaintListener();
  if (!listener)
    return false;

  bool result = true;
  PAINTSTRUCT ps;

#ifdef MOZ_XUL
  if (!aDC && (eTransparencyTransparent == mTransparencyMode))
  {
    // For layered translucent windows all drawing should go to memory DC and no
    // WM_PAINT messages are normally generated. To support asynchronous painting
    // we force generation of WM_PAINT messages by invalidating window areas with
    // RedrawWindow, InvalidateRect or InvalidateRgn function calls.
    // BeginPaint/EndPaint must be called to make Windows think that invalid area
    // is painted. Otherwise it will continue sending the same message endlessly.
    ::BeginPaint(mWnd, &ps);
    ::EndPaint(mWnd, &ps);

    aDC = mMemoryDC;
  }
#endif

  mPainting = true;

#ifdef WIDGET_DEBUG_OUTPUT
  HRGN debugPaintFlashRegion = NULL;
  HDC debugPaintFlashDC = NULL;

  if (debug_WantPaintFlashing())
  {
    debugPaintFlashRegion = ::CreateRectRgn(0, 0, 0, 0);
    ::GetUpdateRgn(mWnd, debugPaintFlashRegion, TRUE);
    debugPaintFlashDC = ::GetDC(mWnd);
  }
#endif // WIDGET_DEBUG_OUTPUT

  HDC hDC = aDC ? aDC : (::BeginPaint(mWnd, &ps));
  if (!IsRenderMode(gfxWindowsPlatform::RENDER_DIRECT2D)) {
    mPaintDC = hDC;
  }

#ifdef MOZ_XUL
  bool forceRepaint = aDC || (eTransparencyTransparent == mTransparencyMode);
#else
  bool forceRepaint = NULL != aDC;
#endif
  nsIntRegion region = GetRegionToPaint(forceRepaint, ps, hDC);
  if (!region.IsEmpty() && listener)
  {
    // Should probably pass in a real region here, using GetRandomRgn
    // http://msdn.microsoft.com/library/default.asp?url=/library/en-us/gdi/clipping_4q0e.asp

#ifdef WIDGET_DEBUG_OUTPUT
    debug_DumpPaintEvent(stdout,
                         this,
                         region,
                         nsAutoCString("noname"),
                         (int32_t) mWnd);
#endif // WIDGET_DEBUG_OUTPUT

    switch (GetLayerManager()->GetBackendType()) {
      case LAYERS_BASIC:
        {
          nsRefPtr<gfxASurface> targetSurface;

#if defined(MOZ_XUL)
          // don't support transparency for non-GDI rendering, for now
          if ((IsRenderMode(gfxWindowsPlatform::RENDER_GDI) ||
               IsRenderMode(gfxWindowsPlatform::RENDER_DIRECT2D)) &&
              eTransparencyTransparent == mTransparencyMode) {
            if (mTransparentSurface == nullptr)
              SetupTranslucentWindowMemoryBitmap(mTransparencyMode);
            targetSurface = mTransparentSurface;
          }
#endif

#ifdef CAIRO_HAS_D2D_SURFACE
          if (!targetSurface &&
              IsRenderMode(gfxWindowsPlatform::RENDER_DIRECT2D))
          {
            if (!mD2DWindowSurface) {
              gfxASurface::gfxContentType content = gfxASurface::CONTENT_COLOR;
#if defined(MOZ_XUL)
              if (mTransparencyMode != eTransparencyOpaque) {
                content = gfxASurface::CONTENT_COLOR_ALPHA;
              }
#endif
              mD2DWindowSurface = new gfxD2DSurface(mWnd, content);
            }
            if (!mD2DWindowSurface->CairoStatus()) {
              targetSurface = mD2DWindowSurface;
            } else {
              mD2DWindowSurface = nullptr;
            }
          }
#endif

          nsRefPtr<gfxWindowsSurface> targetSurfaceWin;
          if (!targetSurface &&
              (IsRenderMode(gfxWindowsPlatform::RENDER_GDI) ||
               IsRenderMode(gfxWindowsPlatform::RENDER_DIRECT2D)))
          {
            uint32_t flags = (mTransparencyMode == eTransparencyOpaque) ? 0 :
                gfxWindowsSurface::FLAG_IS_TRANSPARENT;
            targetSurfaceWin = new gfxWindowsSurface(hDC, flags);
            targetSurface = targetSurfaceWin;
          }

          nsRefPtr<gfxImageSurface> targetSurfaceImage;
          if (!targetSurface &&
              (IsRenderMode(gfxWindowsPlatform::RENDER_IMAGE_STRETCH32) ||
               IsRenderMode(gfxWindowsPlatform::RENDER_IMAGE_STRETCH24)))
          {
            gfxIntSize surfaceSize(ps.rcPaint.right - ps.rcPaint.left,
                                   ps.rcPaint.bottom - ps.rcPaint.top);

            if (!EnsureSharedSurfaceSize(surfaceSize)) {
              NS_ERROR("Couldn't allocate a shared image surface!");
              return false;
            }

            // don't use the shared surface directly; instead, create a new one
            // that just reuses its buffer.
            targetSurfaceImage = new gfxImageSurface(sSharedSurfaceData.get(),
                                                     surfaceSize,
                                                     surfaceSize.width * 4,
                                                     gfxASurface::ImageFormatRGB24);

            if (targetSurfaceImage && !targetSurfaceImage->CairoStatus()) {
              targetSurfaceImage->SetDeviceOffset(gfxPoint(-ps.rcPaint.left, -ps.rcPaint.top));
              targetSurface = targetSurfaceImage;
            }
          }

          if (!targetSurface) {
            NS_ERROR("Invalid RenderMode!");
            return false;
          }

          nsRefPtr<gfxContext> thebesContext;
          if (gfxPlatform::GetPlatform()->SupportsAzureContentForType(mozilla::gfx::BACKEND_CAIRO)) {
            RECT paintRect;
            ::GetClientRect(mWnd, &paintRect);
            RefPtr<mozilla::gfx::DrawTarget> dt =
              gfxPlatform::GetPlatform()->CreateDrawTargetForSurface(targetSurface,
                                                                     mozilla::gfx::IntSize(paintRect.right - paintRect.left,
                                                                                           paintRect.bottom - paintRect.top));
            thebesContext = new gfxContext(dt);
          } else {
            thebesContext = new gfxContext(targetSurface);
          }

          if (IsRenderMode(gfxWindowsPlatform::RENDER_DIRECT2D)) {
            const nsIntRect* r;
            for (nsIntRegionRectIterator iter(region);
                 (r = iter.Next()) != nullptr;) {
              thebesContext->Rectangle(gfxRect(r->x, r->y, r->width, r->height), true);
            }
            thebesContext->Clip();
            thebesContext->SetOperator(gfxContext::OPERATOR_CLEAR);
            thebesContext->Paint();
            thebesContext->SetOperator(gfxContext::OPERATOR_OVER);
          }

          // don't need to double buffer with anything but GDI
          BufferMode doubleBuffering = mozilla::layers::BUFFER_NONE;
          if (IsRenderMode(gfxWindowsPlatform::RENDER_GDI)) {
#ifdef MOZ_XUL
            switch (mTransparencyMode) {
              case eTransparencyGlass:
              case eTransparencyBorderlessGlass:
              default:
                // If we're not doing translucency, then double buffer
                doubleBuffering = mozilla::layers::BUFFER_BUFFERED;
                break;
              case eTransparencyTransparent:
                // If we're rendering with translucency, we're going to be
                // rendering the whole window; make sure we clear it first
                thebesContext->SetOperator(gfxContext::OPERATOR_CLEAR);
                thebesContext->Paint();
                thebesContext->SetOperator(gfxContext::OPERATOR_OVER);
                break;
            }
#else
            doubleBuffering = mozilla::layers::BUFFER_BUFFERED;
#endif
          }

          {
            AutoLayerManagerSetup
                setupLayerManager(this, thebesContext, doubleBuffering);
            result = listener->PaintWindow(this, region);
          }

#ifdef MOZ_XUL
          if ((IsRenderMode(gfxWindowsPlatform::RENDER_GDI) ||
               IsRenderMode(gfxWindowsPlatform::RENDER_DIRECT2D))&&
              eTransparencyTransparent == mTransparencyMode) {
            // Data from offscreen drawing surface was copied to memory bitmap of transparent
            // bitmap. Now it can be read from memory bitmap to apply alpha channel and after
            // that displayed on the screen.
            UpdateTranslucentWindow();
          } else
#endif
#ifdef CAIRO_HAS_D2D_SURFACE
          if (result) {
            if (mD2DWindowSurface) {
              mD2DWindowSurface->Present();
            }
          }
#endif
          if (result) {
            if (IsRenderMode(gfxWindowsPlatform::RENDER_IMAGE_STRETCH24) ||
                IsRenderMode(gfxWindowsPlatform::RENDER_IMAGE_STRETCH32))
            {
              gfxIntSize surfaceSize = targetSurfaceImage->GetSize();

              // Just blit this directly
              BITMAPINFOHEADER bi;
              memset(&bi, 0, sizeof(BITMAPINFOHEADER));
              bi.biSize = sizeof(BITMAPINFOHEADER);
              bi.biWidth = surfaceSize.width;
              bi.biHeight = - surfaceSize.height;
              bi.biPlanes = 1;
              bi.biBitCount = 32;
              bi.biCompression = BI_RGB;

              if (IsRenderMode(gfxWindowsPlatform::RENDER_IMAGE_STRETCH24)) {
                // On Windows CE/Windows Mobile, 24bpp packed-pixel sources
                // seem to be far faster to blit than 32bpp (see bug 484864).
                // So, convert the bits to 24bpp by stripping out the unused
                // alpha byte.  24bpp DIBs also have scanlines that are 4-byte
                // aligned though, so that must be taken into account.
                int srcstride = surfaceSize.width*4;
                int dststride = surfaceSize.width*3;
                dststride = (dststride + 3) & ~3;

                // Convert in place
                for (int j = 0; j < surfaceSize.height; ++j) {
                  unsigned int *src = (unsigned int*) (targetSurfaceImage->Data() + j*srcstride);
                  unsigned int *dst = (unsigned int*) (targetSurfaceImage->Data() + j*dststride);

                  // go 4 pixels at a time, since each 4 pixels
                  // turns into 3 DWORDs when converted into BGR:
                  // BGRx BGRx BGRx BGRx -> BGRB GRBG RBGR
                  //
                  // However, since we're dealing with little-endian ints, this is actually:
                  // xRGB xrgb xRGB xrgb -> bRGB GBrg rgbR
                  int width_left = surfaceSize.width;
                  while (width_left >= 4) {
                    unsigned int a = *src++;
                    unsigned int b = *src++;
                    unsigned int c = *src++;
                    unsigned int d = *src++;

                    *dst++ =  (a & 0x00ffffff)        | (b << 24);
                    *dst++ = ((b & 0x00ffff00) >> 8)  | (c << 16);
                    *dst++ = ((c & 0x00ff0000) >> 16) | (d << 8);

                    width_left -= 4;
                  }

                  // then finish up whatever number of pixels are left,
                  // using bytes.
                  unsigned char *bsrc = (unsigned char*) src;
                  unsigned char *bdst = (unsigned char*) dst;
                  switch (width_left) {
                    case 3:
                      *bdst++ = *bsrc++;
                      *bdst++ = *bsrc++;
                      *bdst++ = *bsrc++;
                      bsrc++;
                    case 2:
                      *bdst++ = *bsrc++;
                      *bdst++ = *bsrc++;
                      *bdst++ = *bsrc++;
                      bsrc++;
                    case 1:
                      *bdst++ = *bsrc++;
                      *bdst++ = *bsrc++;
                      *bdst++ = *bsrc++;
                      bsrc++;
                    case 0:
                      break;
                  }
                }

                bi.biBitCount = 24;
              }

              StretchDIBits(hDC,
                            ps.rcPaint.left, ps.rcPaint.top,
                            surfaceSize.width, surfaceSize.height,
                            0, 0,
                            surfaceSize.width, surfaceSize.height,
                            targetSurfaceImage->Data(),
                            (BITMAPINFO*) &bi,
                            DIB_RGB_COLORS,
                            SRCCOPY);
            }
          }
        }
        break;
      case LAYERS_OPENGL:
        static_cast<mozilla::layers::LayerManagerOGL*>(GetLayerManager())->
          SetClippingRegion(region);
        result = listener->PaintWindow(this, region);
        break;
#ifdef MOZ_ENABLE_D3D9_LAYER
      case LAYERS_D3D9:
        {
          nsRefPtr<LayerManagerD3D9> layerManagerD3D9 =
            static_cast<mozilla::layers::LayerManagerD3D9*>(GetLayerManager());
          layerManagerD3D9->SetClippingRegion(region);
          result = listener->PaintWindow(this, region);
          if (layerManagerD3D9->DeviceWasRemoved()) {
            mLayerManager->Destroy();
            mLayerManager = nullptr;
            // When our device was removed, we should have gfxWindowsPlatform
            // check if its render mode is up to date!
            gfxWindowsPlatform::GetPlatform()->UpdateRenderMode();
            Invalidate();
          }
        }
        break;
#endif
#ifdef MOZ_ENABLE_D3D10_LAYER
      case LAYERS_D3D10:
        {
          gfxWindowsPlatform::GetPlatform()->UpdateRenderMode();
          LayerManagerD3D10 *layerManagerD3D10 = static_cast<mozilla::layers::LayerManagerD3D10*>(GetLayerManager());
          if (layerManagerD3D10->device() != gfxWindowsPlatform::GetPlatform()->GetD3D10Device()) {
            Invalidate();
          } else {
            result = listener->PaintWindow(this, region);
          }
        }
        break;
#endif
      case LAYERS_CLIENT:
        result = listener->PaintWindow(this, region);
        break;
      default:
        NS_ERROR("Unknown layers backend used!");
        break;
    }
示例#2
0
bool nsWindow::OnPaint(HDC aDC, uint32_t aNestingLevel)
{
  // We never have reentrant paint events, except when we're running our RPC
  // windows event spin loop. If we don't trap for this, we'll try to paint,
  // but view manager will refuse to paint the surface, resulting is black
  // flashes on the plugin rendering surface.
  if (mozilla::ipc::MessageChannel::IsSpinLoopActive() && mPainting)
    return false;

  if (gfxWindowsPlatform::GetPlatform()->DidRenderingDeviceReset()) {
    gfxWindowsPlatform::GetPlatform()->UpdateRenderMode();
    EnumAllWindows(ClearCompositor);
    return false;
  }

  // After we CallUpdateWindow to the child, occasionally a WM_PAINT message
  // is posted to the parent event loop with an empty update rect. Do a
  // dummy paint so that Windows stops dispatching WM_PAINT in an inifinite
  // loop. See bug 543788.
  if (IsPlugin()) {
    RECT updateRect;
    if (!GetUpdateRect(mWnd, &updateRect, FALSE) ||
        (updateRect.left == updateRect.right &&
         updateRect.top == updateRect.bottom)) {
      PAINTSTRUCT ps;
      BeginPaint(mWnd, &ps);
      EndPaint(mWnd, &ps);
      return true;
    }

    if (mWindowType == eWindowType_plugin_ipc_chrome) {
      // Fire off an async request to the plugin to paint its window
      mozilla::dom::ContentParent::SendAsyncUpdate(this);
      ValidateRect(mWnd, nullptr);
      return true;
    }

    PluginInstanceParent* instance = reinterpret_cast<PluginInstanceParent*>(
      ::GetPropW(mWnd, L"PluginInstanceParentProperty"));
    if (instance) {
      Unused << instance->CallUpdateWindow();
    } else {
      // We should never get here since in-process plugins should have
      // subclassed our HWND and handled WM_PAINT, but in some cases that
      // could fail. Return without asserting since it's not our fault.
      NS_WARNING("Plugin failed to subclass our window");
    }

    ValidateRect(mWnd, nullptr);
    return true;
  }

  ClientLayerManager *clientLayerManager =
      (GetLayerManager()->GetBackendType() == LayersBackend::LAYERS_CLIENT)
      ? static_cast<ClientLayerManager*>(GetLayerManager())
      : nullptr;

  if (clientLayerManager && mCompositorParent &&
      !mBounds.IsEqualEdges(mLastPaintBounds))
  {
    // Do an early async composite so that we at least have something on the
    // screen in the right place, even if the content is out of date.
    mCompositorParent->ScheduleRenderOnCompositorThread();
  }
  mLastPaintBounds = mBounds;

  PAINTSTRUCT ps;

#ifdef MOZ_XUL
  if (!aDC && (eTransparencyTransparent == mTransparencyMode))
  {
    // For layered translucent windows all drawing should go to memory DC and no
    // WM_PAINT messages are normally generated. To support asynchronous painting
    // we force generation of WM_PAINT messages by invalidating window areas with
    // RedrawWindow, InvalidateRect or InvalidateRgn function calls.
    // BeginPaint/EndPaint must be called to make Windows think that invalid area
    // is painted. Otherwise it will continue sending the same message endlessly.
    ::BeginPaint(mWnd, &ps);
    ::EndPaint(mWnd, &ps);

    aDC = mMemoryDC;
  }
#endif

  mPainting = true;

#ifdef WIDGET_DEBUG_OUTPUT
  HRGN debugPaintFlashRegion = nullptr;
  HDC debugPaintFlashDC = nullptr;

  if (debug_WantPaintFlashing())
  {
    debugPaintFlashRegion = ::CreateRectRgn(0, 0, 0, 0);
    ::GetUpdateRgn(mWnd, debugPaintFlashRegion, TRUE);
    debugPaintFlashDC = ::GetDC(mWnd);
  }
#endif // WIDGET_DEBUG_OUTPUT

  HDC hDC = aDC ? aDC : (::BeginPaint(mWnd, &ps));
  mPaintDC = hDC;

#ifdef MOZ_XUL
  bool forceRepaint = aDC || (eTransparencyTransparent == mTransparencyMode);
#else
  bool forceRepaint = nullptr != aDC;
#endif
  nsIntRegion region = GetRegionToPaint(forceRepaint, ps, hDC);

  if (clientLayerManager && mCompositorParent) {
    // We need to paint to the screen even if nothing changed, since if we
    // don't have a compositing window manager, our pixels could be stale.
    clientLayerManager->SetNeedsComposite(true);
    clientLayerManager->SendInvalidRegion(region);
  }

  nsIWidgetListener* listener = GetPaintListener();
  if (listener) {
    listener->WillPaintWindow(this);
  }
  // Re-get the listener since the will paint notification may have killed it.
  listener = GetPaintListener();
  if (!listener) {
    return false;
  }

  if (clientLayerManager && mCompositorParent && clientLayerManager->NeedsComposite()) {
    mCompositorParent->ScheduleRenderOnCompositorThread();
    clientLayerManager->SetNeedsComposite(false);
  }

  bool result = true;
  if (!region.IsEmpty() && listener)
  {
    // Should probably pass in a real region here, using GetRandomRgn
    // http://msdn.microsoft.com/library/default.asp?url=/library/en-us/gdi/clipping_4q0e.asp

#ifdef WIDGET_DEBUG_OUTPUT
    debug_DumpPaintEvent(stdout,
                         this,
                         region,
                         nsAutoCString("noname"),
                         (int32_t) mWnd);
#endif // WIDGET_DEBUG_OUTPUT

    switch (GetLayerManager()->GetBackendType()) {
      case LayersBackend::LAYERS_BASIC:
        {
          RefPtr<gfxASurface> targetSurface;

#if defined(MOZ_XUL)
          // don't support transparency for non-GDI rendering, for now
          if ((IsRenderMode(gfxWindowsPlatform::RENDER_GDI) ||
               IsRenderMode(gfxWindowsPlatform::RENDER_DIRECT2D)) &&
              eTransparencyTransparent == mTransparencyMode) {
            if (mTransparentSurface == nullptr)
              SetupTranslucentWindowMemoryBitmap(mTransparencyMode);
            targetSurface = mTransparentSurface;
          }
#endif

          RefPtr<gfxWindowsSurface> targetSurfaceWin;
          if (!targetSurface &&
              (IsRenderMode(gfxWindowsPlatform::RENDER_GDI) ||
               IsRenderMode(gfxWindowsPlatform::RENDER_DIRECT2D)))
          {
            uint32_t flags = (mTransparencyMode == eTransparencyOpaque) ? 0 :
                gfxWindowsSurface::FLAG_IS_TRANSPARENT;
            targetSurfaceWin = new gfxWindowsSurface(hDC, flags);
            targetSurface = targetSurfaceWin;
          }

          RefPtr<gfxImageSurface> targetSurfaceImage;
          if (!targetSurface &&
              (IsRenderMode(gfxWindowsPlatform::RENDER_IMAGE_STRETCH32) ||
               IsRenderMode(gfxWindowsPlatform::RENDER_IMAGE_STRETCH24)))
          {
            IntSize surfaceSize(ps.rcPaint.right - ps.rcPaint.left,
                                ps.rcPaint.bottom - ps.rcPaint.top);

            if (!EnsureSharedSurfaceSize(surfaceSize)) {
              NS_ERROR("Couldn't allocate a shared image surface!");
              return false;
            }

            // don't use the shared surface directly; instead, create a new one
            // that just reuses its buffer.
            targetSurfaceImage = new gfxImageSurface(sSharedSurfaceData.get(),
                                                     surfaceSize,
                                                     surfaceSize.width * 4,
                                                     SurfaceFormat::X8R8G8B8_UINT32);

            if (targetSurfaceImage && !targetSurfaceImage->CairoStatus()) {
              targetSurfaceImage->SetDeviceOffset(gfxPoint(-ps.rcPaint.left, -ps.rcPaint.top));
              targetSurface = targetSurfaceImage;
            }
          }

          if (!targetSurface) {
            NS_ERROR("Invalid RenderMode!");
            return false;
          }

          RECT paintRect;
          ::GetClientRect(mWnd, &paintRect);
          RefPtr<DrawTarget> dt =
            gfxPlatform::GetPlatform()->CreateDrawTargetForSurface(targetSurface,
                                                                   IntSize(paintRect.right - paintRect.left,
                                                                   paintRect.bottom - paintRect.top));
          if (!dt) {
            gfxWarning() << "nsWindow::OnPaint failed in CreateDrawTargetForSurface";
            return false;
          }

          // don't need to double buffer with anything but GDI
          BufferMode doubleBuffering = mozilla::layers::BufferMode::BUFFER_NONE;
          if (IsRenderMode(gfxWindowsPlatform::RENDER_GDI) ||
              IsRenderMode(gfxWindowsPlatform::RENDER_DIRECT2D)) {
#ifdef MOZ_XUL
            switch (mTransparencyMode) {
              case eTransparencyGlass:
              case eTransparencyBorderlessGlass:
              default:
                // If we're not doing translucency, then double buffer
                doubleBuffering = mozilla::layers::BufferMode::BUFFERED;
                break;
              case eTransparencyTransparent:
                // If we're rendering with translucency, we're going to be
                // rendering the whole window; make sure we clear it first
                dt->ClearRect(Rect(0.f, 0.f,
                                   dt->GetSize().width, dt->GetSize().height));
                break;
            }
#else
            doubleBuffering = mozilla::layers::BufferMode::BUFFERED;
#endif
          }

          RefPtr<gfxContext> thebesContext = new gfxContext(dt);

          {
            AutoLayerManagerSetup
              setupLayerManager(this, thebesContext, doubleBuffering);
            result = listener->PaintWindow(
              this, LayoutDeviceIntRegion::FromUnknownRegion(region));
          }

#ifdef MOZ_XUL
          if ((IsRenderMode(gfxWindowsPlatform::RENDER_GDI) ||
               IsRenderMode(gfxWindowsPlatform::RENDER_DIRECT2D))&&
              eTransparencyTransparent == mTransparencyMode) {
            // Data from offscreen drawing surface was copied to memory bitmap of transparent
            // bitmap. Now it can be read from memory bitmap to apply alpha channel and after
            // that displayed on the screen.
            UpdateTranslucentWindow();
          } else
#endif

          if (result) {
            if (IsRenderMode(gfxWindowsPlatform::RENDER_IMAGE_STRETCH24) ||
                IsRenderMode(gfxWindowsPlatform::RENDER_IMAGE_STRETCH32))
            {
              IntSize surfaceSize = targetSurfaceImage->GetSize();

              // Just blit this directly
              BITMAPINFOHEADER bi;
              memset(&bi, 0, sizeof(BITMAPINFOHEADER));
              bi.biSize = sizeof(BITMAPINFOHEADER);
              bi.biWidth = surfaceSize.width;
              bi.biHeight = - surfaceSize.height;
              bi.biPlanes = 1;
              bi.biBitCount = 32;
              bi.biCompression = BI_RGB;

              if (IsRenderMode(gfxWindowsPlatform::RENDER_IMAGE_STRETCH24)) {
                // On Windows CE/Windows Mobile, 24bpp packed-pixel sources
                // seem to be far faster to blit than 32bpp (see bug 484864).
                // So, convert the bits to 24bpp by stripping out the unused
                // alpha byte.  24bpp DIBs also have scanlines that are 4-byte
                // aligned though, so that must be taken into account.
                int srcstride = surfaceSize.width*4;
                int dststride = surfaceSize.width*3;
                dststride = (dststride + 3) & ~3;

                // Convert in place
                for (int j = 0; j < surfaceSize.height; ++j) {
                  unsigned int *src = (unsigned int*) (targetSurfaceImage->Data() + j*srcstride);
                  unsigned int *dst = (unsigned int*) (targetSurfaceImage->Data() + j*dststride);

                  // go 4 pixels at a time, since each 4 pixels
                  // turns into 3 DWORDs when converted into BGR:
                  // BGRx BGRx BGRx BGRx -> BGRB GRBG RBGR
                  //
                  // However, since we're dealing with little-endian ints, this is actually:
                  // xRGB xrgb xRGB xrgb -> bRGB GBrg rgbR
                  int width_left = surfaceSize.width;
                  while (width_left >= 4) {
                    unsigned int a = *src++;
                    unsigned int b = *src++;
                    unsigned int c = *src++;
                    unsigned int d = *src++;

                    *dst++ =  (a & 0x00ffffff)        | (b << 24);
                    *dst++ = ((b & 0x00ffff00) >> 8)  | (c << 16);
                    *dst++ = ((c & 0x00ff0000) >> 16) | (d << 8);

                    width_left -= 4;
                  }

                  // then finish up whatever number of pixels are left,
                  // using bytes.
                  unsigned char *bsrc = (unsigned char*) src;
                  unsigned char *bdst = (unsigned char*) dst;
                  switch (width_left) {
                    case 3:
                      *bdst++ = *bsrc++;
                      *bdst++ = *bsrc++;
                      *bdst++ = *bsrc++;
                      bsrc++;
                    case 2:
                      *bdst++ = *bsrc++;
                      *bdst++ = *bsrc++;
                      *bdst++ = *bsrc++;
                      bsrc++;
                    case 1:
                      *bdst++ = *bsrc++;
                      *bdst++ = *bsrc++;
                      *bdst++ = *bsrc++;
                      bsrc++;
                    case 0:
                      break;
                  }
                }

                bi.biBitCount = 24;
              }

              StretchDIBits(hDC,
                            ps.rcPaint.left, ps.rcPaint.top,
                            surfaceSize.width, surfaceSize.height,
                            0, 0,
                            surfaceSize.width, surfaceSize.height,
                            targetSurfaceImage->Data(),
                            (BITMAPINFO*) &bi,
                            DIB_RGB_COLORS,
                            SRCCOPY);
            }
          }
        }
        break;
      case LayersBackend::LAYERS_CLIENT:
        {
          result = listener->PaintWindow(
            this, LayoutDeviceIntRegion::FromUnknownRegion(region));
          ClientLayerManager* clientLM =
            static_cast<ClientLayerManager*>(GetLayerManager());
          IDXGISwapChain* swapChain = clientLM->GetTextureFactoryIdentifier().mSwapChain.get();
          if (swapChain) {
            // Workaround for bug 1232042. On some devices artifacts will occur
            // is we don't do a main thread present call from the WM_PAINT event.
            swapChain->Present(0, 0);
          }
        }
        break;
      default:
        NS_ERROR("Unknown layers backend used!");
        break;
    }
示例#3
0
bool nsWindow::OnPaint(HDC aDC, uint32_t aNestingLevel)
{
  // We never have reentrant paint events, except when we're running our RPC
  // windows event spin loop. If we don't trap for this, we'll try to paint,
  // but view manager will refuse to paint the surface, resulting is black
  // flashes on the plugin rendering surface.
  if (mozilla::ipc::MessageChannel::IsSpinLoopActive() && mPainting)
    return false;

  DeviceResetReason resetReason = DeviceResetReason::OK;
  if (gfxWindowsPlatform::GetPlatform()->DidRenderingDeviceReset(&resetReason)) {
    gfxCriticalNote << "(nsWindow) Detected device reset: " << (int)resetReason;

    gfxWindowsPlatform::GetPlatform()->UpdateRenderMode();

    uint64_t resetSeqNo = GPUProcessManager::Get()->GetNextDeviceResetSequenceNumber();
    nsTArray<nsWindow*> windows = EnumAllWindows();
    for (nsWindow* window : windows) {
      window->OnRenderingDeviceReset(resetSeqNo);
    }

    gfxCriticalNote << "(nsWindow) Finished device reset.";
    return false;
  }

  gfxDWriteFont::UpdateClearTypeUsage();

  // After we CallUpdateWindow to the child, occasionally a WM_PAINT message
  // is posted to the parent event loop with an empty update rect. Do a
  // dummy paint so that Windows stops dispatching WM_PAINT in an inifinite
  // loop. See bug 543788.
  if (IsPlugin()) {
    RECT updateRect;
    if (!GetUpdateRect(mWnd, &updateRect, FALSE) ||
        (updateRect.left == updateRect.right &&
         updateRect.top == updateRect.bottom)) {
      PAINTSTRUCT ps;
      BeginPaint(mWnd, &ps);
      EndPaint(mWnd, &ps);
      return true;
    }

    if (mWindowType == eWindowType_plugin_ipc_chrome) {
      // Fire off an async request to the plugin to paint its window
      mozilla::dom::ContentParent::SendAsyncUpdate(this);
      ValidateRect(mWnd, nullptr);
      return true;
    }

    PluginInstanceParent* instance = reinterpret_cast<PluginInstanceParent*>(
      ::GetPropW(mWnd, L"PluginInstanceParentProperty"));
    if (instance) {
      Unused << instance->CallUpdateWindow();
    } else {
      // We should never get here since in-process plugins should have
      // subclassed our HWND and handled WM_PAINT, but in some cases that
      // could fail. Return without asserting since it's not our fault.
      NS_WARNING("Plugin failed to subclass our window");
    }

    ValidateRect(mWnd, nullptr);
    return true;
  }

  ClientLayerManager *clientLayerManager = GetLayerManager()->AsClientLayerManager();

  if (clientLayerManager && !mBounds.IsEqualEdges(mLastPaintBounds)) {
    // Do an early async composite so that we at least have something on the
    // screen in the right place, even if the content is out of date.
    clientLayerManager->Composite();
  }
  mLastPaintBounds = mBounds;

  PAINTSTRUCT ps;

#ifdef MOZ_XUL
  if (!aDC && (eTransparencyTransparent == mTransparencyMode))
  {
    // For layered translucent windows all drawing should go to memory DC and no
    // WM_PAINT messages are normally generated. To support asynchronous painting
    // we force generation of WM_PAINT messages by invalidating window areas with
    // RedrawWindow, InvalidateRect or InvalidateRgn function calls.
    // BeginPaint/EndPaint must be called to make Windows think that invalid area
    // is painted. Otherwise it will continue sending the same message endlessly.
    ::BeginPaint(mWnd, &ps);
    ::EndPaint(mWnd, &ps);

    // We're guaranteed to have a widget proxy since we called GetLayerManager().
    aDC = mCompositorWidgetDelegate->GetTransparentDC();
  }
#endif

  mPainting = true;

#ifdef WIDGET_DEBUG_OUTPUT
  HRGN debugPaintFlashRegion = nullptr;
  HDC debugPaintFlashDC = nullptr;

  if (debug_WantPaintFlashing())
  {
    debugPaintFlashRegion = ::CreateRectRgn(0, 0, 0, 0);
    ::GetUpdateRgn(mWnd, debugPaintFlashRegion, TRUE);
    debugPaintFlashDC = ::GetDC(mWnd);
  }
#endif // WIDGET_DEBUG_OUTPUT

  HDC hDC = aDC ? aDC : (::BeginPaint(mWnd, &ps));
  mPaintDC = hDC;

#ifdef MOZ_XUL
  bool forceRepaint = aDC || (eTransparencyTransparent == mTransparencyMode);
#else
  bool forceRepaint = nullptr != aDC;
#endif
  nsIntRegion region = GetRegionToPaint(forceRepaint, ps, hDC);

  if (clientLayerManager) {
    // We need to paint to the screen even if nothing changed, since if we
    // don't have a compositing window manager, our pixels could be stale.
    clientLayerManager->SetNeedsComposite(true);
    clientLayerManager->SendInvalidRegion(region);
  }

  RefPtr<nsWindow> strongThis(this);

  nsIWidgetListener* listener = GetPaintListener();
  if (listener) {
    listener->WillPaintWindow(this);
  }
  // Re-get the listener since the will paint notification may have killed it.
  listener = GetPaintListener();
  if (!listener) {
    return false;
  }

  if (clientLayerManager && clientLayerManager->NeedsComposite()) {
    clientLayerManager->Composite();
    clientLayerManager->SetNeedsComposite(false);
  }

  bool result = true;
  if (!region.IsEmpty() && listener)
  {
    // Should probably pass in a real region here, using GetRandomRgn
    // http://msdn.microsoft.com/library/default.asp?url=/library/en-us/gdi/clipping_4q0e.asp

#ifdef WIDGET_DEBUG_OUTPUT
    debug_DumpPaintEvent(stdout,
                         this,
                         region,
                         "noname",
                         (int32_t) mWnd);
#endif // WIDGET_DEBUG_OUTPUT

    switch (GetLayerManager()->GetBackendType()) {
      case LayersBackend::LAYERS_BASIC:
        {
          RefPtr<gfxASurface> targetSurface;

#if defined(MOZ_XUL)
          // don't support transparency for non-GDI rendering, for now
          if (eTransparencyTransparent == mTransparencyMode) {
            targetSurface = mBasicLayersSurface->EnsureTransparentSurface();
          }
#endif

          RefPtr<gfxWindowsSurface> targetSurfaceWin;
          if (!targetSurface)
          {
            uint32_t flags = (mTransparencyMode == eTransparencyOpaque) ? 0 :
                gfxWindowsSurface::FLAG_IS_TRANSPARENT;
            targetSurfaceWin = new gfxWindowsSurface(hDC, flags);
            targetSurface = targetSurfaceWin;
          }

          if (!targetSurface) {
            NS_ERROR("Invalid RenderMode!");
            return false;
          }

          RECT paintRect;
          ::GetClientRect(mWnd, &paintRect);
          RefPtr<DrawTarget> dt =
            gfxPlatform::GetPlatform()->CreateDrawTargetForSurface(targetSurface,
                                                                   IntSize(paintRect.right - paintRect.left,
                                                                   paintRect.bottom - paintRect.top));
          if (!dt || !dt->IsValid()) {
            gfxWarning() << "nsWindow::OnPaint failed in CreateDrawTargetForSurface";
            return false;
          }

          // don't need to double buffer with anything but GDI
          BufferMode doubleBuffering = mozilla::layers::BufferMode::BUFFER_NONE;
#ifdef MOZ_XUL
          switch (mTransparencyMode) {
            case eTransparencyGlass:
            case eTransparencyBorderlessGlass:
            default:
              // If we're not doing translucency, then double buffer
              doubleBuffering = mozilla::layers::BufferMode::BUFFERED;
              break;
            case eTransparencyTransparent:
              // If we're rendering with translucency, we're going to be
              // rendering the whole window; make sure we clear it first
              dt->ClearRect(Rect(0.f, 0.f,
                                 dt->GetSize().width, dt->GetSize().height));
              break;
          }
#else
          doubleBuffering = mozilla::layers::BufferMode::BUFFERED;
#endif

          RefPtr<gfxContext> thebesContext = gfxContext::CreateOrNull(dt);
          MOZ_ASSERT(thebesContext); // already checked draw target above

          {
            AutoLayerManagerSetup
              setupLayerManager(this, thebesContext, doubleBuffering);
            result = listener->PaintWindow(
              this, LayoutDeviceIntRegion::FromUnknownRegion(region));
          }

#ifdef MOZ_XUL
          if (eTransparencyTransparent == mTransparencyMode) {
            // Data from offscreen drawing surface was copied to memory bitmap of transparent
            // bitmap. Now it can be read from memory bitmap to apply alpha channel and after
            // that displayed on the screen.
            mBasicLayersSurface->RedrawTransparentWindow();
          }
#endif
        }
        break;
      case LayersBackend::LAYERS_CLIENT:
        {
          result = listener->PaintWindow(
            this, LayoutDeviceIntRegion::FromUnknownRegion(region));
          if (!gfxEnv::DisableForcePresent() && gfxWindowsPlatform::GetPlatform()->DwmCompositionEnabled()) {
            nsCOMPtr<nsIRunnable> event =
              NewRunnableMethod(this, &nsWindow::ForcePresent);
            NS_DispatchToMainThread(event);
          }
        }
        break;
      default:
        NS_ERROR("Unknown layers backend used!");
        break;
    }
  }

  if (!aDC) {
    ::EndPaint(mWnd, &ps);
  }

  mPaintDC = nullptr;
  mLastPaintEndTime = TimeStamp::Now();

#if defined(WIDGET_DEBUG_OUTPUT)
  if (debug_WantPaintFlashing())
  {
    // Only flash paint events which have not ignored the paint message.
    // Those that ignore the paint message aren't painting anything so there
    // is only the overhead of the dispatching the paint event.
    if (result) {
      ::InvertRgn(debugPaintFlashDC, debugPaintFlashRegion);
      PR_Sleep(PR_MillisecondsToInterval(30));
      ::InvertRgn(debugPaintFlashDC, debugPaintFlashRegion);
      PR_Sleep(PR_MillisecondsToInterval(30));
    }
    ::ReleaseDC(mWnd, debugPaintFlashDC);
    ::DeleteObject(debugPaintFlashRegion);
  }
#endif // WIDGET_DEBUG_OUTPUT

  mPainting = false;

  // Re-get the listener since painting may have killed it.
  listener = GetPaintListener();
  if (listener)
    listener->DidPaintWindow();

  if (aNestingLevel == 0 && ::GetUpdateRect(mWnd, nullptr, false)) {
    OnPaint(aDC, 1);
  }

  return result;
}
示例#4
0
PRBool nsWindow::OnPaint(HDC aDC)
{
#ifdef MOZ_IPC
  if (mWindowType == eWindowType_plugin) {

    /**
     * After we CallUpdateWindow to the child, occasionally a WM_PAINT message
     * is posted to the parent event loop with an empty update rect. Do a
     * dummy paint so that Windows stops dispatching WM_PAINT in an inifinite
     * loop. See bug 543788.
     */
    RECT updateRect;
    if (!GetUpdateRect(mWnd, &updateRect, FALSE) ||
        (updateRect.left == updateRect.right &&
         updateRect.top == updateRect.bottom)) {
      PAINTSTRUCT ps;
      BeginPaint(mWnd, &ps);
      EndPaint(mWnd, &ps);
      return PR_TRUE;
    }

    PluginInstanceParent* instance = reinterpret_cast<PluginInstanceParent*>(
      ::GetPropW(mWnd, L"PluginInstanceParentProperty"));
    if (instance) {
      instance->CallUpdateWindow();
      ValidateRect(mWnd, NULL);
      return PR_TRUE;
    }
  }
#endif

#ifdef MOZ_IPC
  // We never have reentrant paint events, except when we're running our RPC
  // windows event spin loop. If we don't trap for this, we'll try to paint,
  // but view manager will refuse to paint the surface, resulting is black
  // flashes on the plugin rendering surface.
  if (mozilla::ipc::RPCChannel::IsSpinLoopActive() && mPainting)
    return PR_FALSE;
#endif

  nsPaintEvent willPaintEvent(PR_TRUE, NS_WILL_PAINT, this);
  DispatchWindowEvent(&willPaintEvent);

#ifdef CAIRO_HAS_DDRAW_SURFACE
  if (IsRenderMode(gfxWindowsPlatform::RENDER_IMAGE_DDRAW16)) {
    return OnPaintImageDDraw16();
  }
#endif

  PRBool result = PR_TRUE;
  PAINTSTRUCT ps;
  nsEventStatus eventStatus = nsEventStatus_eIgnore;

#ifdef MOZ_XUL
  if (!aDC && (eTransparencyTransparent == mTransparencyMode))
  {
    // For layered translucent windows all drawing should go to memory DC and no
    // WM_PAINT messages are normally generated. To support asynchronous painting
    // we force generation of WM_PAINT messages by invalidating window areas with
    // RedrawWindow, InvalidateRect or InvalidateRgn function calls.
    // BeginPaint/EndPaint must be called to make Windows think that invalid area
    // is painted. Otherwise it will continue sending the same message endlessly.
    ::BeginPaint(mWnd, &ps);
    ::EndPaint(mWnd, &ps);

    aDC = mMemoryDC;
  }
#endif

  mPainting = PR_TRUE;

#ifdef WIDGET_DEBUG_OUTPUT
  HRGN debugPaintFlashRegion = NULL;
  HDC debugPaintFlashDC = NULL;

  if (debug_WantPaintFlashing())
  {
    debugPaintFlashRegion = ::CreateRectRgn(0, 0, 0, 0);
    ::GetUpdateRgn(mWnd, debugPaintFlashRegion, TRUE);
    debugPaintFlashDC = ::GetDC(mWnd);
  }
#endif // WIDGET_DEBUG_OUTPUT

  HDC hDC = aDC ? aDC : (::BeginPaint(mWnd, &ps));
  if (!IsRenderMode(gfxWindowsPlatform::RENDER_DIRECT2D)) {
    mPaintDC = hDC;
  }

#ifdef MOZ_XUL
  PRBool forceRepaint = aDC || (eTransparencyTransparent == mTransparencyMode);
#else
  PRBool forceRepaint = NULL != aDC;
#endif
  nsCOMPtr<nsIRegion> paintRgnWin = GetRegionToPaint(forceRepaint, ps, hDC);

  if (paintRgnWin &&
      !paintRgnWin->IsEmpty() &&
      mEventCallback)
  {
    // generate the event and call the event callback
    nsPaintEvent event(PR_TRUE, NS_PAINT, this);

    InitEvent(event);

    event.region = paintRgnWin;
    event.rect = nsnull;
 
    // Should probably pass in a real region here, using GetRandomRgn
    // http://msdn.microsoft.com/library/default.asp?url=/library/en-us/gdi/clipping_4q0e.asp

#ifdef WIDGET_DEBUG_OUTPUT
    debug_DumpPaintEvent(stdout,
                         this,
                         &event,
                         nsCAutoString("noname"),
                         (PRInt32) mWnd);
#endif // WIDGET_DEBUG_OUTPUT

    nsRefPtr<gfxASurface> targetSurface;

#if defined(MOZ_XUL)
    // don't support transparency for non-GDI rendering, for now
    if (IsRenderMode(gfxWindowsPlatform::RENDER_GDI) && eTransparencyTransparent == mTransparencyMode) {
      if (mTransparentSurface == nsnull)
        SetupTranslucentWindowMemoryBitmap(mTransparencyMode);
      targetSurface = mTransparentSurface;
    }
#endif

    nsRefPtr<gfxWindowsSurface> targetSurfaceWin;
    if (!targetSurface &&
        IsRenderMode(gfxWindowsPlatform::RENDER_GDI))
    {
      targetSurfaceWin = new gfxWindowsSurface(hDC);
      targetSurface = targetSurfaceWin;
    }
#ifdef CAIRO_HAS_D2D_SURFACE
    if (!targetSurface &&
        IsRenderMode(gfxWindowsPlatform::RENDER_DIRECT2D))
    {
      if (!mD2DWindowSurface) {
        mD2DWindowSurface = new gfxD2DSurface(mWnd);
      }
      targetSurface = mD2DWindowSurface;
    }
#endif
#ifdef CAIRO_HAS_DDRAW_SURFACE
    nsRefPtr<gfxDDrawSurface> targetSurfaceDDraw;
    if (!targetSurface &&
        (IsRenderMode(gfxWindowsPlatform::RENDER_DDRAW) ||
         IsRenderMode(gfxWindowsPlatform::RENDER_DDRAW_GL)))
    {
      if (!glpDD) {
        if (!nsWindowGfx::InitDDraw()) {
          NS_WARNING("DirectDraw init failed; falling back to RENDER_IMAGE_STRETCH24");
          gfxWindowsPlatform::GetPlatform()->SetRenderMode(gfxWindowsPlatform::RENDER_IMAGE_STRETCH24);
          goto DDRAW_FAILED;
        }
      }

      // create a rect that maps the window in screen space
      // create a new sub-surface that aliases this one
      RECT winrect;
      GetClientRect(mWnd, &winrect);
      MapWindowPoints(mWnd, NULL, (LPPOINT)&winrect, 2);

      targetSurfaceDDraw = new gfxDDrawSurface(gpDDSurf.get(), winrect);
      targetSurface = targetSurfaceDDraw;
    }
#endif

DDRAW_FAILED:
    nsRefPtr<gfxImageSurface> targetSurfaceImage;
    if (!targetSurface &&
        (IsRenderMode(gfxWindowsPlatform::RENDER_IMAGE_STRETCH32) ||
         IsRenderMode(gfxWindowsPlatform::RENDER_IMAGE_STRETCH24)))
    {
      gfxIntSize surfaceSize(ps.rcPaint.right - ps.rcPaint.left,
                             ps.rcPaint.bottom - ps.rcPaint.top);

      if (!EnsureSharedSurfaceSize(surfaceSize)) {
        NS_ERROR("Couldn't allocate a shared image surface!");
        return NS_ERROR_FAILURE;
      }

      // don't use the shared surface directly; instead, create a new one
      // that just reuses its buffer.
      targetSurfaceImage = new gfxImageSurface(sSharedSurfaceData.get(),
                                               surfaceSize,
                                               surfaceSize.width * 4,
                                               gfxASurface::ImageFormatRGB24);

      if (targetSurfaceImage && !targetSurfaceImage->CairoStatus()) {
        targetSurfaceImage->SetDeviceOffset(gfxPoint(-ps.rcPaint.left, -ps.rcPaint.top));
        targetSurface = targetSurfaceImage;
      }
    }

    if (!targetSurface) {
      NS_ERROR("Invalid RenderMode!");
      return NS_ERROR_FAILURE;
    }

    nsRefPtr<gfxContext> thebesContext = new gfxContext(targetSurface);
    thebesContext->SetFlag(gfxContext::FLAG_DESTINED_FOR_SCREEN);
    if (IsRenderMode(gfxWindowsPlatform::RENDER_DIRECT2D) && paintRgnWin) {
      PRUint32 rects;
      paintRgnWin->GetNumRects(&rects);
      nsRegionRectSet *rectSet = NULL;
      paintRgnWin->GetRects(&rectSet);
      for (int i = 0; i < rectSet->mNumRects; i++) {
        thebesContext->Rectangle(
        gfxRect(
               rectSet->mRects[i].x,
               rectSet->mRects[i].y,
               rectSet->mRects[i].width,
               rectSet->mRects[i].height), PR_TRUE);
      }
      thebesContext->Clip();

      paintRgnWin->FreeRects(rectSet);
    }
#ifdef WINCE
    thebesContext->SetFlag(gfxContext::FLAG_SIMPLIFY_OPERATORS);
#endif

    // don't need to double buffer with anything but GDI
    if (IsRenderMode(gfxWindowsPlatform::RENDER_GDI)) {
# if defined(MOZ_XUL) && !defined(WINCE)
      if (eTransparencyGlass == mTransparencyMode && nsUXThemeData::sHaveCompositor) {
        thebesContext->PushGroup(gfxASurface::CONTENT_COLOR_ALPHA);
      } else if (eTransparencyTransparent == mTransparencyMode) {
        // If we're rendering with translucency, we're going to be
        // rendering the whole window; make sure we clear it first
        thebesContext->SetOperator(gfxContext::OPERATOR_CLEAR);
        thebesContext->Paint();
        thebesContext->SetOperator(gfxContext::OPERATOR_OVER);
      } else
#endif
      {
        // If we're not doing translucency, then double buffer
        thebesContext->PushGroup(gfxASurface::CONTENT_COLOR);
      }
    }

    nsCOMPtr<nsIRenderingContext> rc;
    nsresult rv = mContext->CreateRenderingContextInstance (*getter_AddRefs(rc));
    if (NS_FAILED(rv)) {
      NS_WARNING("CreateRenderingContextInstance failed");
      return PR_FALSE;
    }

    rv = rc->Init(mContext, thebesContext);
    if (NS_FAILED(rv)) {
      NS_WARNING("RC::Init failed");
      return PR_FALSE;
    }

    event.renderingContext = rc;
    result = DispatchWindowEvent(&event, eventStatus);
    event.renderingContext = nsnull;

#ifdef MOZ_XUL
    if (IsRenderMode(gfxWindowsPlatform::RENDER_GDI) &&
        eTransparencyTransparent == mTransparencyMode) {
      // Data from offscreen drawing surface was copied to memory bitmap of transparent
      // bitmap. Now it can be read from memory bitmap to apply alpha channel and after
      // that displayed on the screen.
      UpdateTranslucentWindow();
    } else
#endif
#ifdef CAIRO_HAS_D2D_SURFACE
    if (result) {
      if (mD2DWindowSurface) {
        mD2DWindowSurface->Present();
      }
    }
#endif
    if (result) {
      if (IsRenderMode(gfxWindowsPlatform::RENDER_GDI)) {
        // Only update if DispatchWindowEvent returned TRUE; otherwise, nothing handled
        // this, and we'll just end up painting with black.
        thebesContext->PopGroupToSource();
        thebesContext->SetOperator(gfxContext::OPERATOR_SOURCE);
        thebesContext->Paint();
      } else if (IsRenderMode(gfxWindowsPlatform::RENDER_DDRAW) ||
                 IsRenderMode(gfxWindowsPlatform::RENDER_DDRAW_GL))
      {
#ifdef CAIRO_HAS_DDRAW_SURFACE
        // blit with direct draw
        HRESULT hr = glpDDClipper->SetHWnd(0, mWnd);

#ifdef DEBUG
        if (FAILED(hr))
          DDError("SetHWnd", hr);
#endif

        // blt from the affected area from the window back-buffer to the
        // screen-relative coordinates of the window paint area
        RECT dst_rect = ps.rcPaint;
        MapWindowPoints(mWnd, NULL, (LPPOINT)&dst_rect, 2);
        hr = glpDDPrimary->Blt(&dst_rect,
                               gpDDSurf->GetDDSurface(),
                               &dst_rect,
                               DDBLT_WAITNOTBUSY,
                               NULL);
#ifdef DEBUG
        if (FAILED(hr))
          DDError("SetHWnd", hr);
#endif
#endif
      } else if (IsRenderMode(gfxWindowsPlatform::RENDER_IMAGE_STRETCH24) ||
                 IsRenderMode(gfxWindowsPlatform::RENDER_IMAGE_STRETCH32)) 
      {
        gfxIntSize surfaceSize = targetSurfaceImage->GetSize();

        // Just blit this directly
        BITMAPINFOHEADER bi;
        memset(&bi, 0, sizeof(BITMAPINFOHEADER));
        bi.biSize = sizeof(BITMAPINFOHEADER);
        bi.biWidth = surfaceSize.width;
        bi.biHeight = - surfaceSize.height;
        bi.biPlanes = 1;
        bi.biBitCount = 32;
        bi.biCompression = BI_RGB;

        if (IsRenderMode(gfxWindowsPlatform::RENDER_IMAGE_STRETCH24)) {
          // On Windows CE/Windows Mobile, 24bpp packed-pixel sources
          // seem to be far faster to blit than 32bpp (see bug 484864).
          // So, convert the bits to 24bpp by stripping out the unused
          // alpha byte.  24bpp DIBs also have scanlines that are 4-byte
          // aligned though, so that must be taken into account.
          int srcstride = surfaceSize.width*4;
          int dststride = surfaceSize.width*3;
          dststride = (dststride + 3) & ~3;

          // Convert in place
          for (int j = 0; j < surfaceSize.height; ++j) {
            unsigned int *src = (unsigned int*) (targetSurfaceImage->Data() + j*srcstride);
            unsigned int *dst = (unsigned int*) (targetSurfaceImage->Data() + j*dststride);

            // go 4 pixels at a time, since each 4 pixels
            // turns into 3 DWORDs when converted into BGR:
            // BGRx BGRx BGRx BGRx -> BGRB GRBG RBGR
            //
            // However, since we're dealing with little-endian ints, this is actually:
            // xRGB xrgb xRGB xrgb -> bRGB GBrg rgbR
            int width_left = surfaceSize.width;
            while (width_left >= 4) {
              unsigned int a = *src++;
              unsigned int b = *src++;
              unsigned int c = *src++;
              unsigned int d = *src++;

              *dst++ =  (a & 0x00ffffff)        | (b << 24);
              *dst++ = ((b & 0x00ffff00) >> 8)  | (c << 16);
              *dst++ = ((c & 0x00ff0000) >> 16) | (d << 8);

              width_left -= 4;
            }

            // then finish up whatever number of pixels are left,
            // using bytes.
            unsigned char *bsrc = (unsigned char*) src;
            unsigned char *bdst = (unsigned char*) dst;
            switch (width_left) {
              case 3:
                *bdst++ = *bsrc++;
                *bdst++ = *bsrc++;
                *bdst++ = *bsrc++;
                bsrc++;
              case 2:
                *bdst++ = *bsrc++;
                *bdst++ = *bsrc++;
                *bdst++ = *bsrc++;
                bsrc++;
              case 1:
                *bdst++ = *bsrc++;
                *bdst++ = *bsrc++;
                *bdst++ = *bsrc++;
                bsrc++;
              case 0:
                break;
            }
          }

          bi.biBitCount = 24;
        }

        StretchDIBits(hDC,
                      ps.rcPaint.left, ps.rcPaint.top,
                      surfaceSize.width, surfaceSize.height,
                      0, 0,
                      surfaceSize.width, surfaceSize.height,
                      targetSurfaceImage->Data(),
                      (BITMAPINFO*) &bi,
                      DIB_RGB_COLORS,
                      SRCCOPY);
      }
    }