Exemplo n.º 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::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;
}
Exemplo n.º 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));
        break;
      default:
        NS_ERROR("Unknown layers backend used!");
        break;
    }