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-rw-r--r--widget/windows/nsWindowGfx.cpp733
1 files changed, 733 insertions, 0 deletions
diff --git a/widget/windows/nsWindowGfx.cpp b/widget/windows/nsWindowGfx.cpp
new file mode 100644
index 0000000000..8df90a63c9
--- /dev/null
+++ b/widget/windows/nsWindowGfx.cpp
@@ -0,0 +1,733 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/*
+ * nsWindowGfx - Painting and aceleration.
+ */
+
+/**************************************************************
+ **************************************************************
+ **
+ ** BLOCK: Includes
+ **
+ ** Include headers.
+ **
+ **************************************************************
+ **************************************************************/
+
+#include "mozilla/dom/ContentParent.h"
+
+#include "nsWindowGfx.h"
+#include "nsAppRunner.h"
+#include <windows.h>
+#include <shellapi.h>
+#include "gfxEnv.h"
+#include "gfxImageSurface.h"
+#include "gfxUtils.h"
+#include "gfxConfig.h"
+#include "gfxWindowsSurface.h"
+#include "gfxWindowsPlatform.h"
+#include "gfxDWriteFonts.h"
+#include "mozilla/gfx/2D.h"
+#include "mozilla/gfx/DataSurfaceHelpers.h"
+#include "mozilla/gfx/Tools.h"
+#include "mozilla/RefPtr.h"
+#include "mozilla/UniquePtrExtensions.h"
+#include "nsGfxCIID.h"
+#include "gfxContext.h"
+#include "WinUtils.h"
+#include "WinWindowOcclusionTracker.h"
+#include "nsIWidgetListener.h"
+#include "mozilla/Unused.h"
+#include "nsDebug.h"
+#include "WindowRenderer.h"
+#include "mozilla/layers/WebRenderLayerManager.h"
+
+#include "mozilla/gfx/GPUProcessManager.h"
+#include "mozilla/layers/CompositorBridgeParent.h"
+#include "mozilla/layers/CompositorBridgeChild.h"
+#include "InProcessWinCompositorWidget.h"
+
+#include "nsUXThemeData.h"
+#include "nsUXThemeConstants.h"
+
+using namespace mozilla;
+using namespace mozilla::gfx;
+using namespace mozilla::layers;
+using namespace mozilla::widget;
+using namespace mozilla::plugins;
+extern mozilla::LazyLogModule gWindowsLog;
+
+/**************************************************************
+ **************************************************************
+ **
+ ** BLOCK: Variables
+ **
+ ** nsWindow Class static initializations and global variables.
+ **
+ **************************************************************
+ **************************************************************/
+
+/**************************************************************
+ *
+ * SECTION: nsWindow statics
+ *
+ **************************************************************/
+
+struct IconMetrics {
+ int32_t xMetric;
+ int32_t yMetric;
+ int32_t defaultSize;
+};
+
+// Corresponds 1:1 to the IconSizeType enum
+static IconMetrics sIconMetrics[] = {
+ {SM_CXSMICON, SM_CYSMICON, 16}, // small icon
+ {SM_CXICON, SM_CYICON, 32} // regular icon
+};
+
+/**************************************************************
+ **************************************************************
+ **
+ ** BLOCK: nsWindow impl.
+ **
+ ** Paint related nsWindow methods.
+ **
+ **************************************************************
+ **************************************************************/
+
+// GetRegionToPaint returns the invalidated region that needs to be painted
+LayoutDeviceIntRegion nsWindow::GetRegionToPaint(bool aForceFullRepaint,
+ PAINTSTRUCT ps, HDC aDC) {
+ if (aForceFullRepaint) {
+ RECT paintRect;
+ ::GetClientRect(mWnd, &paintRect);
+ return LayoutDeviceIntRegion(WinUtils::ToIntRect(paintRect));
+ }
+
+ HRGN paintRgn = ::CreateRectRgn(0, 0, 0, 0);
+ if (paintRgn != nullptr) {
+ int result = GetRandomRgn(aDC, paintRgn, SYSRGN);
+ if (result == 1) {
+ POINT pt = {0, 0};
+ ::MapWindowPoints(nullptr, mWnd, &pt, 1);
+ ::OffsetRgn(paintRgn, pt.x, pt.y);
+ }
+ LayoutDeviceIntRegion rgn(WinUtils::ConvertHRGNToRegion(paintRgn));
+ ::DeleteObject(paintRgn);
+ return rgn;
+ }
+ return LayoutDeviceIntRegion(WinUtils::ToIntRect(ps.rcPaint));
+}
+
+nsIWidgetListener* nsWindow::GetPaintListener() {
+ if (mDestroyCalled) return nullptr;
+ return mAttachedWidgetListener ? mAttachedWidgetListener : mWidgetListener;
+}
+
+void nsWindow::ForcePresent() {
+ if (mResizeState != RESIZING) {
+ if (CompositorBridgeChild* remoteRenderer = GetRemoteRenderer()) {
+ remoteRenderer->SendForcePresent(wr::RenderReasons::WIDGET);
+ }
+ }
+}
+
+bool nsWindow::OnPaint(HDC aDC, uint32_t aNestingLevel) {
+ DeviceResetReason resetReason = DeviceResetReason::OK;
+ if (gfxWindowsPlatform::GetPlatform()->DidRenderingDeviceReset(
+ &resetReason)) {
+ gfxCriticalNote << "(nsWindow) Detected device reset: " << (int)resetReason;
+
+ gfxWindowsPlatform::GetPlatform()->UpdateRenderMode();
+
+ bool guilty;
+ switch (resetReason) {
+ case DeviceResetReason::HUNG:
+ case DeviceResetReason::RESET:
+ case DeviceResetReason::INVALID_CALL:
+ guilty = true;
+ break;
+ default:
+ guilty = false;
+ break;
+ }
+
+ GPUProcessManager::Get()->OnInProcessDeviceReset(guilty);
+
+ gfxCriticalNote << "(nsWindow) Finished device reset.";
+ return false;
+ }
+
+ PAINTSTRUCT ps;
+
+ // Avoid starting the GPU process for the initial navigator:blank window.
+ if (mIsEarlyBlankWindow) {
+ // Call BeginPaint/EndPaint or Windows will keep sending us messages.
+ ::BeginPaint(mWnd, &ps);
+ ::EndPaint(mWnd, &ps);
+ return true;
+ }
+
+ WindowRenderer* renderer = GetWindowRenderer();
+ KnowsCompositor* knowsCompositor = renderer->AsKnowsCompositor();
+ WebRenderLayerManager* layerManager = renderer->AsWebRender();
+
+ // Clear window by transparent black when compositor window is used in GPU
+ // process and non-client area rendering by DWM is enabled.
+ // It is for showing non-client area rendering. See nsWindow::UpdateGlass().
+ if (HasGlass() && knowsCompositor && knowsCompositor->GetUseCompositorWnd()) {
+ HDC hdc;
+ RECT rect;
+ hdc = ::GetWindowDC(mWnd);
+ ::GetWindowRect(mWnd, &rect);
+ ::MapWindowPoints(nullptr, mWnd, (LPPOINT)&rect, 2);
+ ::FillRect(hdc, &rect,
+ reinterpret_cast<HBRUSH>(GetStockObject(BLACK_BRUSH)));
+ ReleaseDC(mWnd, hdc);
+ }
+
+ if (mClearNCEdge) {
+ // We need to clear this edge of the non-client region to black (once).
+ HDC hdc;
+ RECT rect;
+ hdc = ::GetWindowDC(mWnd);
+ ::GetWindowRect(mWnd, &rect);
+ ::MapWindowPoints(nullptr, mWnd, (LPPOINT)&rect, 2);
+ switch (mClearNCEdge.value()) {
+ case ABE_TOP:
+ rect.bottom = rect.top + kHiddenTaskbarSize;
+ break;
+ case ABE_LEFT:
+ rect.right = rect.left + kHiddenTaskbarSize;
+ break;
+ case ABE_BOTTOM:
+ rect.top = rect.bottom - kHiddenTaskbarSize;
+ break;
+ case ABE_RIGHT:
+ rect.left = rect.right - kHiddenTaskbarSize;
+ break;
+ default:
+ MOZ_ASSERT_UNREACHABLE("Invalid edge value");
+ break;
+ }
+ ::FillRect(hdc, &rect,
+ reinterpret_cast<HBRUSH>(::GetStockObject(BLACK_BRUSH)));
+ ::ReleaseDC(mWnd, hdc);
+
+ mClearNCEdge.reset();
+ }
+
+ if (knowsCompositor && layerManager &&
+ !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.
+ layerManager->ScheduleComposite(wr::RenderReasons::WIDGET);
+ }
+ mLastPaintBounds = mBounds;
+
+ if (!aDC && (renderer->GetBackendType() == LayersBackend::LAYERS_NONE) &&
+ (TransparencyMode::Transparent == 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 = mBasicLayersSurface->GetTransparentDC();
+ }
+
+ HDC hDC = aDC ? aDC : (::BeginPaint(mWnd, &ps));
+ mPaintDC = hDC;
+
+ bool forceRepaint =
+ aDC || (TransparencyMode::Transparent == mTransparencyMode);
+ LayoutDeviceIntRegion region = GetRegionToPaint(forceRepaint, ps, hDC);
+
+ if (knowsCompositor && layerManager) {
+ // 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.
+ layerManager->SetNeedsComposite(true);
+ layerManager->SendInvalidRegion(region.ToUnknownRegion());
+ }
+
+ 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 (knowsCompositor && layerManager && layerManager->NeedsComposite()) {
+ layerManager->ScheduleComposite(wr::RenderReasons::WIDGET);
+ layerManager->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.ToUnknownRegion(), "noname",
+ (int32_t)mWnd);
+#endif // WIDGET_DEBUG_OUTPUT
+
+ switch (renderer->GetBackendType()) {
+ case LayersBackend::LAYERS_NONE: {
+ RefPtr<gfxASurface> targetSurface;
+
+ // don't support transparency for non-GDI rendering, for now
+ if (TransparencyMode::Transparent == mTransparencyMode) {
+ // This mutex needs to be held when EnsureTransparentSurface is
+ // called.
+ MutexAutoLock lock(mBasicLayersSurface->GetTransparentSurfaceLock());
+ targetSurface = mBasicLayersSurface->EnsureTransparentSurface();
+ }
+
+ RefPtr<gfxWindowsSurface> targetSurfaceWin;
+ if (!targetSurface) {
+ uint32_t flags = (mTransparencyMode == TransparencyMode::Opaque)
+ ? 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::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;
+ switch (mTransparencyMode) {
+ case TransparencyMode::BorderlessGlass:
+ default:
+ // If we're not doing translucency, then double buffer
+ doubleBuffering = mozilla::layers::BufferMode::BUFFERED;
+ break;
+ case TransparencyMode::Transparent:
+ // 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;
+ }
+
+ gfxContext thebesContext(dt);
+
+ {
+ AutoLayerManagerSetup setupLayerManager(this, &thebesContext,
+ doubleBuffering);
+ result = listener->PaintWindow(this, region);
+ }
+
+ if (TransparencyMode::Transparent == 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();
+ }
+ } break;
+ case LayersBackend::LAYERS_WR: {
+ result = listener->PaintWindow(this, region);
+ if (!gfxEnv::MOZ_DISABLE_FORCE_PRESENT() &&
+ gfxWindowsPlatform::GetPlatform()->DwmCompositionEnabled()) {
+ nsCOMPtr<nsIRunnable> event = NewRunnableMethod(
+ "nsWindow::ForcePresent", 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();
+
+ // 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;
+}
+
+bool nsWindow::NeedsToTrackWindowOcclusionState() {
+ if (!WinWindowOcclusionTracker::Get()) {
+ return false;
+ }
+
+ if (mCompositorSession && mWindowType == WindowType::TopLevel) {
+ return true;
+ }
+
+ return false;
+}
+
+void nsWindow::NotifyOcclusionState(mozilla::widget::OcclusionState aState) {
+ MOZ_ASSERT(NeedsToTrackWindowOcclusionState());
+
+ bool isFullyOccluded = aState == mozilla::widget::OcclusionState::OCCLUDED;
+ // When window is minimized, it is not set as fully occluded.
+ if (mFrameState->GetSizeMode() == nsSizeMode_Minimized) {
+ isFullyOccluded = false;
+ }
+
+ // Don't dispatch if the new occlustion state is the same as the current
+ // state.
+ if (mIsFullyOccluded == isFullyOccluded) {
+ return;
+ }
+
+ mIsFullyOccluded = isFullyOccluded;
+
+ MOZ_LOG(gWindowsLog, LogLevel::Info,
+ ("nsWindow::NotifyOcclusionState() mIsFullyOccluded %d "
+ "mFrameState->GetSizeMode() %d",
+ mIsFullyOccluded, mFrameState->GetSizeMode()));
+
+ wr::DebugFlags flags{0};
+ flags.bits = gfx::gfxVars::WebRenderDebugFlags();
+ bool debugEnabled = bool(flags & wr::DebugFlags::WINDOW_VISIBILITY_DBG);
+ if (debugEnabled && mCompositorWidgetDelegate) {
+ mCompositorWidgetDelegate->NotifyVisibilityUpdated(
+ mFrameState->GetSizeMode(), mIsFullyOccluded);
+ }
+
+ if (mWidgetListener) {
+ mWidgetListener->OcclusionStateChanged(mIsFullyOccluded);
+ }
+}
+
+void nsWindow::MaybeEnableWindowOcclusion(bool aEnable) {
+ // WindowOcclusion is enabled/disabled only when compositor session exists.
+ // See nsWindow::NeedsToTrackWindowOcclusionState().
+ if (!mCompositorSession) {
+ return;
+ }
+
+ bool enabled = gfxConfig::IsEnabled(gfx::Feature::WINDOW_OCCLUSION);
+
+ if (aEnable) {
+ // Enable window occlusion.
+ if (enabled && NeedsToTrackWindowOcclusionState()) {
+ WinWindowOcclusionTracker::Get()->Enable(this, mWnd);
+
+ wr::DebugFlags flags{0};
+ flags.bits = gfx::gfxVars::WebRenderDebugFlags();
+ bool debugEnabled = bool(flags & wr::DebugFlags::WINDOW_VISIBILITY_DBG);
+ if (debugEnabled && mCompositorWidgetDelegate) {
+ mCompositorWidgetDelegate->NotifyVisibilityUpdated(
+ mFrameState->GetSizeMode(), mIsFullyOccluded);
+ }
+ }
+ return;
+ }
+
+ // Disable window occlusion.
+ MOZ_ASSERT(!aEnable);
+
+ if (!NeedsToTrackWindowOcclusionState()) {
+ return;
+ }
+
+ WinWindowOcclusionTracker::Get()->Disable(this, mWnd);
+ NotifyOcclusionState(OcclusionState::VISIBLE);
+
+ wr::DebugFlags flags{0};
+ flags.bits = gfx::gfxVars::WebRenderDebugFlags();
+ bool debugEnabled = bool(flags & wr::DebugFlags::WINDOW_VISIBILITY_DBG);
+ if (debugEnabled && mCompositorWidgetDelegate) {
+ mCompositorWidgetDelegate->NotifyVisibilityUpdated(
+ mFrameState->GetSizeMode(), mIsFullyOccluded);
+ }
+}
+
+// This override of CreateCompositor is to add support for sending the IPC
+// call for RequesetFxrOutput as soon as the compositor for this widget is
+// available.
+void nsWindow::CreateCompositor() {
+ nsBaseWidget::CreateCompositor();
+
+ MaybeEnableWindowOcclusion(/* aEnable */ true);
+
+ if (mRequestFxrOutputPending) {
+ GetRemoteRenderer()->SendRequestFxrOutput();
+ }
+}
+
+void nsWindow::DestroyCompositor() {
+ MaybeEnableWindowOcclusion(/* aEnable */ false);
+
+ nsBaseWidget::DestroyCompositor();
+}
+
+void nsWindow::RequestFxrOutput() {
+ if (GetRemoteRenderer() != nullptr) {
+ MOZ_CRASH("RequestFxrOutput should happen before Compositor is created.");
+ } else {
+ // The compositor isn't ready, so indicate to make the IPC call when
+ // it is available.
+ mRequestFxrOutputPending = true;
+ }
+}
+
+LayoutDeviceIntSize nsWindowGfx::GetIconMetrics(IconSizeType aSizeType) {
+ int32_t width = ::GetSystemMetrics(sIconMetrics[aSizeType].xMetric);
+ int32_t height = ::GetSystemMetrics(sIconMetrics[aSizeType].yMetric);
+
+ if (width == 0 || height == 0) {
+ width = height = sIconMetrics[aSizeType].defaultSize;
+ }
+
+ return LayoutDeviceIntSize(width, height);
+}
+
+nsresult nsWindowGfx::CreateIcon(imgIContainer* aContainer, bool aIsCursor,
+ LayoutDeviceIntPoint aHotspot,
+ LayoutDeviceIntSize aScaledSize,
+ HICON* aIcon) {
+ MOZ_ASSERT(aHotspot.x >= 0 && aHotspot.y >= 0);
+ MOZ_ASSERT((aScaledSize.width > 0 && aScaledSize.height > 0) ||
+ (aScaledSize.width == 0 && aScaledSize.height == 0));
+
+ // Get the image data
+ RefPtr<SourceSurface> surface = aContainer->GetFrame(
+ imgIContainer::FRAME_CURRENT,
+ imgIContainer::FLAG_SYNC_DECODE | imgIContainer::FLAG_ASYNC_NOTIFY);
+ NS_ENSURE_TRUE(surface, NS_ERROR_NOT_AVAILABLE);
+
+ IntSize frameSize = surface->GetSize();
+ if (frameSize.IsEmpty()) {
+ return NS_ERROR_FAILURE;
+ }
+
+ IntSize iconSize(aScaledSize.width, aScaledSize.height);
+ if (iconSize == IntSize(0, 0)) { // use frame's intrinsic size
+ iconSize = frameSize;
+ }
+
+ RefPtr<DataSourceSurface> dataSurface;
+ bool mappedOK;
+ DataSourceSurface::MappedSurface map;
+
+ if (iconSize != frameSize) {
+ // Scale the surface
+ dataSurface =
+ Factory::CreateDataSourceSurface(iconSize, SurfaceFormat::B8G8R8A8);
+ NS_ENSURE_TRUE(dataSurface, NS_ERROR_FAILURE);
+ mappedOK = dataSurface->Map(DataSourceSurface::MapType::READ_WRITE, &map);
+ NS_ENSURE_TRUE(mappedOK, NS_ERROR_FAILURE);
+
+ RefPtr<DrawTarget> dt = Factory::CreateDrawTargetForData(
+ BackendType::CAIRO, map.mData, dataSurface->GetSize(), map.mStride,
+ SurfaceFormat::B8G8R8A8);
+ if (!dt) {
+ gfxWarning()
+ << "nsWindowGfx::CreatesIcon failed in CreateDrawTargetForData";
+ return NS_ERROR_OUT_OF_MEMORY;
+ }
+ dt->DrawSurface(surface, Rect(0, 0, iconSize.width, iconSize.height),
+ Rect(0, 0, frameSize.width, frameSize.height),
+ DrawSurfaceOptions(),
+ DrawOptions(1.0f, CompositionOp::OP_SOURCE));
+ } else if (surface->GetFormat() != SurfaceFormat::B8G8R8A8) {
+ // Convert format to SurfaceFormat::B8G8R8A8
+ dataSurface = gfxUtils::CopySurfaceToDataSourceSurfaceWithFormat(
+ surface, SurfaceFormat::B8G8R8A8);
+ NS_ENSURE_TRUE(dataSurface, NS_ERROR_FAILURE);
+ mappedOK = dataSurface->Map(DataSourceSurface::MapType::READ, &map);
+ } else {
+ dataSurface = surface->GetDataSurface();
+ NS_ENSURE_TRUE(dataSurface, NS_ERROR_FAILURE);
+ mappedOK = dataSurface->Map(DataSourceSurface::MapType::READ, &map);
+ }
+ NS_ENSURE_TRUE(dataSurface && mappedOK, NS_ERROR_FAILURE);
+ MOZ_ASSERT(dataSurface->GetFormat() == SurfaceFormat::B8G8R8A8);
+
+ uint8_t* data = nullptr;
+ UniquePtr<uint8_t[]> autoDeleteArray;
+ if (map.mStride == BytesPerPixel(dataSurface->GetFormat()) * iconSize.width) {
+ // Mapped data is already packed
+ data = map.mData;
+ } else {
+ // We can't use map.mData since the pixels are not packed (as required by
+ // CreateDIBitmap, which is called under the DataToBitmap call below).
+ //
+ // We must unmap before calling SurfaceToPackedBGRA because it needs access
+ // to the pixel data.
+ dataSurface->Unmap();
+ map.mData = nullptr;
+
+ autoDeleteArray = SurfaceToPackedBGRA(dataSurface);
+ data = autoDeleteArray.get();
+ NS_ENSURE_TRUE(data, NS_ERROR_FAILURE);
+ }
+
+ HBITMAP bmp = DataToBitmap(data, iconSize.width, -iconSize.height, 32);
+ uint8_t* a1data = Data32BitTo1Bit(data, iconSize.width, iconSize.height);
+ if (map.mData) {
+ dataSurface->Unmap();
+ }
+ if (!a1data) {
+ return NS_ERROR_FAILURE;
+ }
+
+ HBITMAP mbmp = DataToBitmap(a1data, iconSize.width, -iconSize.height, 1);
+ free(a1data);
+
+ ICONINFO info = {0};
+ info.fIcon = !aIsCursor;
+ info.xHotspot = aHotspot.x;
+ info.yHotspot = aHotspot.y;
+ info.hbmMask = mbmp;
+ info.hbmColor = bmp;
+
+ HCURSOR icon = ::CreateIconIndirect(&info);
+ ::DeleteObject(mbmp);
+ ::DeleteObject(bmp);
+ if (!icon) return NS_ERROR_FAILURE;
+ *aIcon = icon;
+ return NS_OK;
+}
+
+// Adjust cursor image data
+uint8_t* nsWindowGfx::Data32BitTo1Bit(uint8_t* aImageData, uint32_t aWidth,
+ uint32_t aHeight) {
+ // We need (aWidth + 7) / 8 bytes plus zero-padding up to a multiple of
+ // 4 bytes for each row (HBITMAP requirement). Bug 353553.
+ uint32_t outBpr = ((aWidth + 31) / 8) & ~3;
+
+ // Allocate and clear mask buffer
+ uint8_t* outData = (uint8_t*)calloc(outBpr, aHeight);
+ if (!outData) return nullptr;
+
+ int32_t* imageRow = (int32_t*)aImageData;
+ for (uint32_t curRow = 0; curRow < aHeight; curRow++) {
+ uint8_t* outRow = outData + curRow * outBpr;
+ uint8_t mask = 0x80;
+ for (uint32_t curCol = 0; curCol < aWidth; curCol++) {
+ // Use sign bit to test for transparency, as alpha byte is highest byte
+ if (*imageRow++ < 0) *outRow |= mask;
+
+ mask >>= 1;
+ if (!mask) {
+ outRow++;
+ mask = 0x80;
+ }
+ }
+ }
+
+ return outData;
+}
+
+/**
+ * Convert the given image data to a HBITMAP. If the requested depth is
+ * 32 bit, a bitmap with an alpha channel will be returned.
+ *
+ * @param aImageData The image data to convert. Must use the format accepted
+ * by CreateDIBitmap.
+ * @param aWidth With of the bitmap, in pixels.
+ * @param aHeight Height of the image, in pixels.
+ * @param aDepth Image depth, in bits. Should be one of 1, 24 and 32.
+ *
+ * @return The HBITMAP representing the image. Caller should call
+ * DeleteObject when done with the bitmap.
+ * On failure, nullptr will be returned.
+ */
+HBITMAP nsWindowGfx::DataToBitmap(uint8_t* aImageData, uint32_t aWidth,
+ uint32_t aHeight, uint32_t aDepth) {
+ HDC dc = ::GetDC(nullptr);
+
+ if (aDepth == 32) {
+ // Alpha channel. We need the new header.
+ BITMAPV4HEADER head = {0};
+ head.bV4Size = sizeof(head);
+ head.bV4Width = aWidth;
+ head.bV4Height = aHeight;
+ head.bV4Planes = 1;
+ head.bV4BitCount = aDepth;
+ head.bV4V4Compression = BI_BITFIELDS;
+ head.bV4SizeImage = 0; // Uncompressed
+ head.bV4XPelsPerMeter = 0;
+ head.bV4YPelsPerMeter = 0;
+ head.bV4ClrUsed = 0;
+ head.bV4ClrImportant = 0;
+
+ head.bV4RedMask = 0x00FF0000;
+ head.bV4GreenMask = 0x0000FF00;
+ head.bV4BlueMask = 0x000000FF;
+ head.bV4AlphaMask = 0xFF000000;
+
+ HBITMAP bmp = ::CreateDIBitmap(
+ dc, reinterpret_cast<CONST BITMAPINFOHEADER*>(&head), CBM_INIT,
+ aImageData, reinterpret_cast<CONST BITMAPINFO*>(&head), DIB_RGB_COLORS);
+ ::ReleaseDC(nullptr, dc);
+ return bmp;
+ }
+
+ char reserved_space[sizeof(BITMAPINFOHEADER) + sizeof(RGBQUAD) * 2];
+ BITMAPINFOHEADER& head = *(BITMAPINFOHEADER*)reserved_space;
+
+ head.biSize = sizeof(BITMAPINFOHEADER);
+ head.biWidth = aWidth;
+ head.biHeight = aHeight;
+ head.biPlanes = 1;
+ head.biBitCount = (WORD)aDepth;
+ head.biCompression = BI_RGB;
+ head.biSizeImage = 0; // Uncompressed
+ head.biXPelsPerMeter = 0;
+ head.biYPelsPerMeter = 0;
+ head.biClrUsed = 0;
+ head.biClrImportant = 0;
+
+ BITMAPINFO& bi = *(BITMAPINFO*)reserved_space;
+
+ if (aDepth == 1) {
+ RGBQUAD black = {0, 0, 0, 0};
+ RGBQUAD white = {255, 255, 255, 0};
+
+ bi.bmiColors[0] = white;
+ bi.bmiColors[1] = black;
+ }
+
+ HBITMAP bmp =
+ ::CreateDIBitmap(dc, &head, CBM_INIT, aImageData, &bi, DIB_RGB_COLORS);
+ ::ReleaseDC(nullptr, dc);
+ return bmp;
+}