osr: Implement shared texture support (fixes #1006, fixes #2575)

Adds support for the OnAcceleratedPaint callback. Verified to work
on macOS and Windows. Linux support is present but not implemented
for cefclient, so it is not verified to work.

To test:
Run `cefclient --off-screen-rendering-enabled --shared-texture-enabled`

BUILD.gn

@@ -1997,6 +1997,7 @@ if (is_mac) {
     ]
     frameworks = [
       "AppKit.framework",
+      "IOSurface.framework",
       "OpenGL.framework",
     ]
     defines = [

cef_paths2.gypi

@@ -57,6 +57,7 @@
       'include/internal/cef_types_content_settings.h',
       'include/internal/cef_types_geometry.h',
       'include/internal/cef_types_runtime.h',
+      'include/internal/cef_types_color.h',
     ],
     'includes_capi': [
       'include/capi/cef_base_capi.h',

include/capi/cef_render_handler_capi.h

@@ -33,7 +33,7 @@
 // by hand. See the translator.README.txt file in the tools directory for
 // more information.
 //
-// $hash=5309b2f6da62526ed92c928c0918bc27898cf03b$
+// $hash=5151b6ea3c06e46a75f2cd7679044a2891063d29$
 //
 
 #ifndef CEF_INCLUDE_CAPI_CEF_RENDER_HANDLER_CAPI_H_
@@ -149,17 +149,27 @@ typedef struct _cef_render_handler_t {
   /// Called when an element has been rendered to the shared texture handle.
   /// |type| indicates whether the element is the view or the popup widget.
   /// |dirtyRects| contains the set of rectangles in pixel coordinates that need
-  /// to be repainted. |shared_handle| is the handle for a D3D11 Texture2D that
-  /// can be accessed via ID3D11Device using the OpenSharedResource function.
-  /// This function is only called when cef_window_tInfo::shared_texture_enabled
-  /// is set to true (1), and is currently only supported on Windows.
+  /// to be repainted. |info| contains the shared handle; on Windows it is a
+  /// HANDLE to a texture that can be opened with D3D11 OpenSharedResource, on
+  /// macOS it is an IOSurface pointer that can be opened with Metal or OpenGL,
+  /// and on Linux it contains several planes, each with an fd to the underlying
+  /// system native buffer.
   ///
-  void(CEF_CALLBACK* on_accelerated_paint)(struct _cef_render_handler_t* self,
+  /// The underlying implementation uses a pool to deliver frames. As a result,
+  /// the handle may differ every frame depending on how many frames are in-
+  /// progress. The handle's resource cannot be cached and cannot be accessed
+  /// outside of this callback. It should be reopened each time this callback is
+  /// executed and the contents should be copied to a texture owned by the
+  /// client application. The contents of |info| will be released back to the
+  /// pool after this callback returns.
+  ///
+  void(CEF_CALLBACK* on_accelerated_paint)(
+      struct _cef_render_handler_t* self,
       struct _cef_browser_t* browser,
       cef_paint_element_type_t type,
       size_t dirtyRectsCount,
       cef_rect_t const* dirtyRects,
-                                           void* shared_handle);
+      const cef_accelerated_paint_info_t* info);
 
   ///
   /// Called to retrieve the size of the touch handle for the specified

include/cef_api_hash.h

@@ -42,13 +42,13 @@
 // way that may cause binary incompatibility with other builds. The universal
 // hash value will change if any platform is affected whereas the platform hash
 // values will change only if that particular platform is affected.
-#define CEF_API_HASH_UNIVERSAL "faa2d7c5a95e129e5a746785cbbcb5f5f99cfe53"
+#define CEF_API_HASH_UNIVERSAL "984fcdc779268524c848d94232e2d045d9a42852"
 #if defined(OS_WIN)
-#define CEF_API_HASH_PLATFORM "9123354f4395b59f275ee3389f21734aeeac7a5e"
+#define CEF_API_HASH_PLATFORM "3975a9042b7124d15f39044972f879066f61e9dd"
 #elif defined(OS_MAC)
-#define CEF_API_HASH_PLATFORM "5ae2b1b7fbe4bdbd25dc6f707f6e3bfc163120ad"
+#define CEF_API_HASH_PLATFORM "ffdd4259a0790d813627975952d0e714818c24b2"
 #elif defined(OS_LINUX)
-#define CEF_API_HASH_PLATFORM "41ddfb7023cda15e5b813b237b06111b6d4cabb8"
+#define CEF_API_HASH_PLATFORM "f0dff25daca39032db1f882545b3ad880e731060"
 #endif
 
 #ifdef __cplusplus

include/cef_render_handler.h

@@ -152,16 +152,25 @@ class CefRenderHandler : public virtual CefBaseRefCounted {
   /// Called when an element has been rendered to the shared texture handle.
   /// |type| indicates whether the element is the view or the popup widget.
   /// |dirtyRects| contains the set of rectangles in pixel coordinates that need
-  /// to be repainted. |shared_handle| is the handle for a D3D11 Texture2D that
-  /// can be accessed via ID3D11Device using the OpenSharedResource method. This
-  /// method is only called when CefWindowInfo::shared_texture_enabled is set to
-  /// true, and is currently only supported on Windows.
+  /// to be repainted. |info| contains the shared handle; on Windows it is a
+  /// HANDLE to a texture that can be opened with D3D11 OpenSharedResource, on
+  /// macOS it is an IOSurface pointer that can be opened with Metal or OpenGL,
+  /// and on Linux it contains several planes, each with an fd to the underlying
+  /// system native buffer.
+  ///
+  /// The underlying implementation uses a pool to deliver frames. As a result,
+  /// the handle may differ every frame depending on how many frames are
+  /// in-progress. The handle's resource cannot be cached and cannot be accessed
+  /// outside of this callback. It should be reopened each time this callback is
+  /// executed and the contents should be copied to a texture owned by the
+  /// client application. The contents of |info| will be released back to the
+  /// pool after this callback returns.
   ///
   /*--cef()--*/
   virtual void OnAcceleratedPaint(CefRefPtr<CefBrowser> browser,
                                   PaintElementType type,
                                   const RectList& dirtyRects,
-                                  void* shared_handle) {}
+                                  const CefAcceleratedPaintInfo& info) {}
 
   ///
   /// Called to retrieve the size of the touch handle for the specified

include/internal/cef_types.h

@@ -2925,21 +2925,6 @@ typedef enum {
   RESPONSE_FILTER_ERROR
 } cef_response_filter_status_t;
 
-///
-/// Describes how to interpret the components of a pixel.
-///
-typedef enum {
-  ///
-  /// RGBA with 8 bits per pixel (32bits total).
-  ///
-  CEF_COLOR_TYPE_RGBA_8888,
-
-  ///
-  /// BGRA with 8 bits per pixel (32bits total).
-  ///
-  CEF_COLOR_TYPE_BGRA_8888,
-} cef_color_type_t;
-
 ///
 /// Describes how to interpret the alpha component of a pixel.
 ///

include/internal/cef_types_color.h

@@ -0,0 +1,57 @@
+// Copyright (c) 2024 Marshall A. Greenblatt. All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//    * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//    * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//    * Neither the name of Google Inc. nor the name Chromium Embedded
+// Framework nor the names of its contributors may be used to endorse
+// or promote products derived from this software without specific prior
+// written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#ifndef CEF_INCLUDE_INTERNAL_CEF_TYPES_COLOR_H_
+#define CEF_INCLUDE_INTERNAL_CEF_TYPES_COLOR_H_
+#pragma once
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+///
+/// Describes how to interpret the components of a pixel.
+///
+typedef enum {
+  ///
+  /// RGBA with 8 bits per pixel (32bits total).
+  ///
+  CEF_COLOR_TYPE_RGBA_8888,
+
+  ///
+  /// BGRA with 8 bits per pixel (32bits total).
+  ///
+  CEF_COLOR_TYPE_BGRA_8888,
+} cef_color_type_t;
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif  // CEF_INCLUDE_INTERNAL_CEF_TYPES_COLOR_H_

include/internal/cef_types_linux.h

@@ -43,6 +43,7 @@ typedef struct _XDisplay XDisplay;
 
 #include "include/internal/cef_export.h"
 #include "include/internal/cef_string.h"
+#include "include/internal/cef_types_color.h"
 #include "include/internal/cef_types_geometry.h"
 #include "include/internal/cef_types_runtime.h"
 
@@ -145,6 +146,56 @@ typedef struct _cef_window_info_t {
   cef_runtime_style_t runtime_style;
 } cef_window_info_t;
 
+///
+/// Structure containing the plane information of the shared texture.
+/// Sync with native_pixmap_handle.h
+///
+typedef struct _cef_accelerated_paint_native_pixmap_plane_info_t {
+  ///
+  /// The strides and offsets in bytes to be used when accessing the buffers via
+  /// a memory mapping. One per plane per entry. Size in bytes of the plane is
+  /// necessary to map the buffers.
+  ///
+  uint32_t stride;
+  uint64_t offset;
+  uint64_t size;
+
+  ///
+  /// File descriptor for the underlying memory object (usually dmabuf).
+  ///
+  int fd;
+} cef_accelerated_paint_native_pixmap_plane_t;
+
+#define kAcceleratedPaintMaxPlanes 4
+
+///
+/// Structure containing shared texture information for the OnAcceleratedPaint
+/// callback. Resources will be released to the underlying pool for reuse when
+/// the callback returns from client code.
+///
+typedef struct _cef_accelerated_paint_info_t {
+  ///
+  /// Planes of the shared texture, usually file descriptors of dmabufs.
+  ///
+  cef_accelerated_paint_native_pixmap_plane_t
+      planes[kAcceleratedPaintMaxPlanes];
+
+  ///
+  /// Plane count.
+  ///
+  int plane_count;
+
+  ///
+  /// Modifier could be used with EGL driver.
+  ///
+  uint64_t modifier;
+
+  ///
+  /// The pixel format of the texture.
+  ///
+  cef_color_type_t format;
+} cef_accelerated_paint_info_t;
+
 #ifdef __cplusplus
 }
 #endif

include/internal/cef_types_mac.h

@@ -35,6 +35,7 @@
 
 #if defined(OS_MAC)
 #include "include/internal/cef_string.h"
+#include "include/internal/cef_types_color.h"
 #include "include/internal/cef_types_geometry.h"
 #include "include/internal/cef_types_runtime.h"
 
@@ -45,6 +46,8 @@
 #define cef_event_handle_t void*
 // Actually NSView*
 #define cef_window_handle_t void*
+// Actually IOSurface*
+#define cef_shared_texture_handle_t void*
 
 #define kNullCursorHandle NULL
 #define kNullEventHandle NULL
@@ -144,6 +147,23 @@ typedef struct _cef_window_info_t {
   cef_runtime_style_t runtime_style;
 } cef_window_info_t;
 
+///
+/// Structure containing shared texture information for the OnAcceleratedPaint
+/// callback. Resources will be released to the underlying pool for reuse when
+/// the callback returns from client code.
+///
+typedef struct _cef_accelerated_paint_info_t {
+  ///
+  /// Handle for the shared texture IOSurface.
+  ///
+  cef_shared_texture_handle_t shared_texture_io_surface;
+
+  ///
+  /// The pixel format of the texture.
+  ///
+  cef_color_type_t format;
+} cef_accelerated_paint_info_t;
+
 #ifdef __cplusplus
 }
 #endif

include/internal/cef_types_win.h

@@ -37,6 +37,7 @@
 #include <windows.h>
 
 #include "include/internal/cef_string.h"
+#include "include/internal/cef_types_color.h"
 #include "include/internal/cef_types_geometry.h"
 #include "include/internal/cef_types_runtime.h"
 
@@ -44,6 +45,7 @@
 #define cef_cursor_handle_t HCURSOR
 #define cef_event_handle_t MSG*
 #define cef_window_handle_t HWND
+#define cef_shared_texture_handle_t HANDLE
 
 #define kNullCursorHandle NULL
 #define kNullEventHandle NULL
@@ -112,6 +114,24 @@ typedef struct _cef_window_info_t {
   cef_runtime_style_t runtime_style;
 } cef_window_info_t;
 
+///
+/// Structure containing shared texture information for the OnAcceleratedPaint
+/// callback. Resources will be released to the underlying pool for reuse when
+/// the callback returns from client code.
+///
+typedef struct _cef_accelerated_paint_info_t {
+  ///
+  /// Handle for the shared texture. The shared texture is instantiated
+  /// without a keyed mutex.
+  ///
+  cef_shared_texture_handle_t shared_texture_handle;
+
+  ///
+  /// The pixel format of the texture.
+  ///
+  cef_color_type_t format;
+} cef_accelerated_paint_info_t;
+
 #ifdef __cplusplus
 }
 #endif

include/internal/cef_types_wrappers.h

@@ -750,4 +750,14 @@ struct CefMediaSinkDeviceInfoTraits {
 ///
 using CefMediaSinkDeviceInfo = CefStructBase<CefMediaSinkDeviceInfoTraits>;
 
+///
+/// Class representing accelerated paint info.
+///
+class CefAcceleratedPaintInfo : public cef_accelerated_paint_info_t {
+ public:
+  CefAcceleratedPaintInfo() : cef_accelerated_paint_info_t{} {}
+  CefAcceleratedPaintInfo(const cef_accelerated_paint_info_t& r)
+      : cef_accelerated_paint_info_t(r) {}
+};
+
 #endif  // CEF_INCLUDE_INTERNAL_CEF_TYPES_WRAPPERS_H_

libcef/browser/browser_platform_delegate_create.cc

@@ -58,10 +58,10 @@ std::unique_ptr<CefBrowserPlatformDelegateOsr> CreateOSRDelegate(
       std::move(native_delegate), use_shared_texture, use_external_begin_frame);
 #elif BUILDFLAG(IS_MAC)
   return std::make_unique<CefBrowserPlatformDelegateOsrMac>(
-      std::move(native_delegate));
+      std::move(native_delegate), use_shared_texture, use_external_begin_frame);
 #elif BUILDFLAG(IS_LINUX)
   return std::make_unique<CefBrowserPlatformDelegateOsrLinux>(
-      std::move(native_delegate), use_external_begin_frame);
+      std::move(native_delegate), use_shared_texture, use_external_begin_frame);
 #endif
 }
 

libcef/browser/osr/browser_platform_delegate_osr_linux.cc

@@ -8,9 +8,10 @@
 
 CefBrowserPlatformDelegateOsrLinux::CefBrowserPlatformDelegateOsrLinux(
     std::unique_ptr<CefBrowserPlatformDelegateNative> native_delegate,
+    bool use_shared_texture,
     bool use_external_begin_frame)
     : CefBrowserPlatformDelegateOsr(std::move(native_delegate),
-                                    /*use_shared_texture=*/false,
+                                    use_shared_texture,
                                     use_external_begin_frame) {}
 
 CefWindowHandle CefBrowserPlatformDelegateOsrLinux::GetHostWindowHandle()

libcef/browser/osr/browser_platform_delegate_osr_linux.h

@@ -13,6 +13,7 @@ class CefBrowserPlatformDelegateOsrLinux
  public:
   CefBrowserPlatformDelegateOsrLinux(
       std::unique_ptr<CefBrowserPlatformDelegateNative> native_delegate,
+      bool use_shared_texture,
       bool use_external_begin_frame);
 
   // CefBrowserPlatformDelegate methods:

libcef/browser/osr/browser_platform_delegate_osr_mac.h

@@ -11,7 +11,9 @@
 class CefBrowserPlatformDelegateOsrMac : public CefBrowserPlatformDelegateOsr {
  public:
   explicit CefBrowserPlatformDelegateOsrMac(
-      std::unique_ptr<CefBrowserPlatformDelegateNative> native_delegate);
+      std::unique_ptr<CefBrowserPlatformDelegateNative> native_delegate,
+      bool use_shared_texture,
+      bool use_external_begin_frame);
 
   // CefBrowserPlatformDelegate methods:
   CefWindowHandle GetHostWindowHandle() const override;

libcef/browser/osr/browser_platform_delegate_osr_mac.mm

@@ -7,10 +7,12 @@
 #include <utility>
 
 CefBrowserPlatformDelegateOsrMac::CefBrowserPlatformDelegateOsrMac(
-    std::unique_ptr<CefBrowserPlatformDelegateNative> native_delegate)
+    std::unique_ptr<CefBrowserPlatformDelegateNative> native_delegate,
+    bool use_shared_texture,
+    bool use_external_begin_frame)
     : CefBrowserPlatformDelegateOsr(std::move(native_delegate),
-                                    /*use_shared_texture=*/false,
-                                    /*use_external_begin_frame=*/false) {}
+                                    use_shared_texture,
+                                    use_external_begin_frame) {}
 
 CefWindowHandle CefBrowserPlatformDelegateOsrMac::GetHostWindowHandle() const {
   return native_delegate_->window_info().parent_view;

libcef/browser/osr/render_widget_host_view_osr.cc

@@ -202,6 +202,7 @@ CefRenderWidgetHostViewOSR::CefRenderWidgetHostViewOSR(
     CefRenderWidgetHostViewOSR* parent_host_view)
     : content::RenderWidgetHostViewBase(widget),
       background_color_(background_color),
+      use_shared_texture_(use_shared_texture),
       render_widget_host_(content::RenderWidgetHostImpl::From(widget)),
       has_parent_(parent_host_view != nullptr),
       parent_host_view_(parent_host_view),
@@ -400,7 +401,8 @@ void CefRenderWidgetHostViewOSR::ShowWithVisibility(
   if (!content::GpuDataManagerImpl::GetInstance()->IsGpuCompositingDisabled()) {
     // Start generating frames when we're visible and at the correct size.
     if (!video_consumer_) {
-      video_consumer_ = std::make_unique<CefVideoConsumerOSR>(this);
+      video_consumer_ =
+          std::make_unique<CefVideoConsumerOSR>(this, use_shared_texture_);
       UpdateFrameRate();
     } else {
       video_consumer_->SetActive(true);
@@ -1565,7 +1567,7 @@ void CefRenderWidgetHostViewOSR::OnPaint(const gfx::Rect& damage_rect,
                                          const void* pixels) {
   TRACE_EVENT0("cef", "CefRenderWidgetHostViewOSR::OnPaint");
 
-  // Workaround for https://github.com/chromiumembedded/cef/issues/2817
+  // Workaround for issue #2817.
   if (!is_showing_) {
     return;
   }
@@ -1599,6 +1601,43 @@ void CefRenderWidgetHostViewOSR::OnPaint(const gfx::Rect& damage_rect,
   }
 }
 
+void CefRenderWidgetHostViewOSR::OnAcceleratedPaint(
+    const gfx::Rect& damage_rect,
+    const gfx::Size& pixel_size,
+    const CefAcceleratedPaintInfo& info) {
+  TRACE_EVENT0("cef", "CefRenderWidgetHostViewOSR::OnAcceleratedPaint");
+
+  // Workaround for https://github.com/chromiumembedded/cef/issues/2817
+  if (!is_showing_) {
+    return;
+  }
+
+  CefRefPtr<CefRenderHandler> handler =
+      browser_impl_->client()->GetRenderHandler();
+  CHECK(handler);
+
+  gfx::Rect rect_in_pixels(0, 0, pixel_size.width(), pixel_size.height());
+  rect_in_pixels.Intersect(damage_rect);
+
+  CefRenderHandler::RectList rcList;
+  rcList.emplace_back(rect_in_pixels.x(), rect_in_pixels.y(),
+                      rect_in_pixels.width(), rect_in_pixels.height());
+
+  handler->OnAcceleratedPaint(browser_impl_.get(),
+                              IsPopupWidget() ? PET_POPUP : PET_VIEW, rcList,
+                              info);
+
+  // Release the resize hold when we reach the desired size.
+  if (hold_resize_) {
+    DCHECK_GT(cached_scale_factor_, 0);
+    gfx::Size expected_size =
+        gfx::ScaleToCeiledSize(GetViewBounds().size(), cached_scale_factor_);
+    if (pixel_size == expected_size) {
+      ReleaseResizeHold();
+    }
+  }
+}
+
 ui::Layer* CefRenderWidgetHostViewOSR::GetRootLayer() const {
   return root_layer_.get();
 }

libcef/browser/osr/render_widget_host_view_osr.h

@@ -254,6 +254,9 @@ class CefRenderWidgetHostViewOSR
   void OnPaint(const gfx::Rect& damage_rect,
                const gfx::Size& pixel_size,
                const void* pixels);
+  void OnAcceleratedPaint(const gfx::Rect& damage_rect,
+                          const gfx::Size& pixel_size,
+                          const CefAcceleratedPaintInfo& info);
 
   void OnBeginFame(base::TimeTicks frame_time);
 
@@ -401,6 +404,7 @@ class CefRenderWidgetHostViewOSR
   uint64_t begin_frame_number_ = viz::BeginFrameArgs::kStartingFrameNumber;
   bool begin_frame_pending_ = false;
 
+  bool use_shared_texture_ = false;
   bool sync_frame_rate_ = false;
   bool external_begin_frame_enabled_ = false;
   bool needs_external_begin_frames_ = false;

libcef/browser/osr/video_consumer_osr.cc

@@ -11,6 +11,12 @@
 #include "media/capture/mojom/video_capture_types.mojom.h"
 #include "ui/gfx/skbitmap_operations.h"
 
+#if BUILDFLAG(IS_WIN)
+#include "ipc/service/gpu_memory_buffer_factory_dxgi.h"
+#elif BUILDFLAG(IS_APPLE)
+#include "ipc/service/gpu_memory_buffer_factory_io_surface.h"
+#endif
+
 namespace {
 
 // Helper to always call Done() at the end of OnFrameCaptured().
@@ -28,8 +34,11 @@ class ScopedVideoFrameDone {
 
 }  // namespace
 
-CefVideoConsumerOSR::CefVideoConsumerOSR(CefRenderWidgetHostViewOSR* view)
-    : view_(view), video_capturer_(view->CreateVideoCapturer()) {
+CefVideoConsumerOSR::CefVideoConsumerOSR(CefRenderWidgetHostViewOSR* view,
+                                         bool use_shared_texture)
+    : use_shared_texture_(use_shared_texture),
+      view_(view),
+      video_capturer_(view->CreateVideoCapturer()) {
   video_capturer_->SetFormat(media::PIXEL_FORMAT_ARGB);
 
   // Always use the highest resolution within constraints that doesn't exceed
@@ -45,7 +54,10 @@ CefVideoConsumerOSR::~CefVideoConsumerOSR() = default;
 
 void CefVideoConsumerOSR::SetActive(bool active) {
   if (active) {
-    video_capturer_->Start(this, viz::mojom::BufferFormatPreference::kDefault);
+    video_capturer_->Start(
+        this, use_shared_texture_
+                  ? viz::mojom::BufferFormatPreference::kPreferGpuMemoryBuffer
+                  : viz::mojom::BufferFormatPreference::kDefault);
   } else {
     video_capturer_->Stop();
   }
@@ -88,6 +100,55 @@ void CefVideoConsumerOSR::OnFrameCaptured(
         callbacks) {
   ScopedVideoFrameDone scoped_done(std::move(callbacks));
 
+  // If it is GPU Texture OSR.
+  if (use_shared_texture_) {
+    CHECK(data->is_gpu_memory_buffer_handle() &&
+          (info->pixel_format == media::PIXEL_FORMAT_ARGB ||
+           info->pixel_format == media::PIXEL_FORMAT_ABGR));
+
+    // The info->pixel_format will tell if the texture is RGBA or BGRA
+    // On Linux, X11 lacks support for RGBA_8888 so it might be BGRA.
+    // On Windows and macOS, it should always be RGBA.
+    auto pixel_format = info->pixel_format == media::PIXEL_FORMAT_ABGR
+                            ? CEF_COLOR_TYPE_RGBA_8888
+                            : CEF_COLOR_TYPE_BGRA_8888;
+
+#if BUILDFLAG(IS_WIN)
+    auto& gmb_handle = data->get_gpu_memory_buffer_handle();
+    cef_accelerated_paint_info_t paint_info;
+    paint_info.shared_texture_handle = gmb_handle.dxgi_handle.Get();
+    paint_info.format = pixel_format;
+    view_->OnAcceleratedPaint(content_rect, info->coded_size, paint_info);
+#elif BUILDFLAG(IS_APPLE)
+    auto& gmb_handle = data->get_gpu_memory_buffer_handle();
+    cef_accelerated_paint_info_t paint_info;
+    paint_info.shared_texture_io_surface = gmb_handle.io_surface.get();
+    paint_info.format = pixel_format;
+    view_->OnAcceleratedPaint(content_rect, info->coded_size, paint_info);
+#elif BUILDFLAG(IS_LINUX)
+    auto& gmb_handle = data->get_gpu_memory_buffer_handle();
+    auto& native_pixmap = gmb_handle.native_pixmap_handle;
+    CHECK(native_pixmap.planes.size() <= kAcceleratedPaintMaxPlanes);
+
+    cef_accelerated_paint_info_t paint_info;
+    paint_info.plane_count = native_pixmap.planes.size();
+    paint_info.modifier = native_pixmap.modifier;
+    paint_info.format = pixel_format;
+
+    auto cef_plain_index = 0;
+    for (const auto& plane : native_pixmap.planes) {
+      cef_accelerated_paint_native_pixmap_plane_t cef_plane;
+      cef_plane.stride = plane.stride;
+      cef_plane.offset = plane.offset;
+      cef_plane.size = plane.size;
+      cef_plane.fd = plane.fd.get();
+      paint_info.planes[cef_plain_index++] = cef_plane;
+    }
+    view_->OnAcceleratedPaint(content_rect, info->coded_size, paint_info);
+#endif
+    return;
+  }
+
   if (info->pixel_format != media::PIXEL_FORMAT_ARGB) {
     DLOG(ERROR) << "Unsupported pixel format " << info->pixel_format;
     return;

libcef/browser/osr/video_consumer_osr.h

@@ -11,7 +11,8 @@ class CefRenderWidgetHostViewOSR;
 
 class CefVideoConsumerOSR : public viz::mojom::FrameSinkVideoConsumer {
  public:
-  explicit CefVideoConsumerOSR(CefRenderWidgetHostViewOSR* view);
+  CefVideoConsumerOSR(CefRenderWidgetHostViewOSR* view,
+                      bool use_shared_texture);
 
   CefVideoConsumerOSR(const CefVideoConsumerOSR&) = delete;
   CefVideoConsumerOSR& operator=(const CefVideoConsumerOSR&) = delete;
@@ -37,6 +38,8 @@ class CefVideoConsumerOSR : public viz::mojom::FrameSinkVideoConsumer {
   void OnNewSubCaptureTargetVersion(
       uint32_t sub_capture_target_version) override {}
 
+  const bool use_shared_texture_;
+
   CefRenderWidgetHostViewOSR* const view_;
   std::unique_ptr<viz::ClientFrameSinkVideoCapturer> video_capturer_;
 

libcef_dll/cpptoc/render_handler_cpptoc.cc

@@ -9,7 +9,7 @@
 // implementations. See the translator.README.txt file in the tools directory
 // for more information.
 //
-// $hash=0b4a5f175a85d506a4ba6da1bbdb6bad2306d898$
+// $hash=fb10148445f36dc1712cf760b9754911bbbcdf13$
 //
 
 #include "libcef_dll/cpptoc/render_handler_cpptoc.h"
@@ -315,7 +315,7 @@ render_handler_on_accelerated_paint(struct _cef_render_handler_t* self,
                                     cef_paint_element_type_t type,
                                     size_t dirtyRectsCount,
                                     cef_rect_t const* dirtyRects,
-                                    void* shared_handle) {
+                                    const cef_accelerated_paint_info_t* info) {
   shutdown_checker::AssertNotShutdown();
 
   // AUTO-GENERATED CONTENT - DELETE THIS COMMENT BEFORE MODIFYING
@@ -334,9 +334,9 @@ render_handler_on_accelerated_paint(struct _cef_render_handler_t* self,
   if (dirtyRectsCount > 0 && !dirtyRects) {
     return;
   }
-  // Verify param: shared_handle; type: simple_byaddr
-  DCHECK(shared_handle);
-  if (!shared_handle) {
+  // Verify param: info; type: simple_byref_const
+  DCHECK(info);
+  if (!info) {
     return;
   }
 
@@ -348,10 +348,12 @@ render_handler_on_accelerated_paint(struct _cef_render_handler_t* self,
       dirtyRectsList.push_back(dirtyRectsVal);
     }
   }
+  // Translate param: info; type: simple_byref_const
+  CefAcceleratedPaintInfo infoVal = info ? *info : CefAcceleratedPaintInfo();
 
   // Execute
   CefRenderHandlerCppToC::Get(self)->OnAcceleratedPaint(
-      CefBrowserCToCpp::Wrap(browser), type, dirtyRectsList, shared_handle);
+      CefBrowserCToCpp::Wrap(browser), type, dirtyRectsList, infoVal);
 }
 
 void CEF_CALLBACK

libcef_dll/ctocpp/render_handler_ctocpp.cc

@@ -9,7 +9,7 @@
 // implementations. See the translator.README.txt file in the tools directory
 // for more information.
 //
-// $hash=0a40603ce9d3cb6ee7758c4d8ebad8c2299256cf$
+// $hash=2ef28289570e9eba45c5e2bb87c94e7e8e51ed0e$
 //
 
 #include "libcef_dll/ctocpp/render_handler_ctocpp.h"
@@ -239,10 +239,11 @@ void CefRenderHandlerCToCpp::OnPaint(CefRefPtr<CefBrowser> browser,
 }
 
 NO_SANITIZE("cfi-icall")
-void CefRenderHandlerCToCpp::OnAcceleratedPaint(CefRefPtr<CefBrowser> browser,
+void CefRenderHandlerCToCpp::OnAcceleratedPaint(
+    CefRefPtr<CefBrowser> browser,
     PaintElementType type,
     const RectList& dirtyRects,
-                                                void* shared_handle) {
+    const CefAcceleratedPaintInfo& info) {
   shutdown_checker::AssertNotShutdown();
 
   cef_render_handler_t* _struct = GetStruct();
@@ -257,11 +258,6 @@ void CefRenderHandlerCToCpp::OnAcceleratedPaint(CefRefPtr<CefBrowser> browser,
   if (!browser.get()) {
     return;
   }
-  // Verify param: shared_handle; type: simple_byaddr
-  DCHECK(shared_handle);
-  if (!shared_handle) {
-    return;
-  }
 
   // Translate param: dirtyRects; type: simple_vec_byref_const
   const size_t dirtyRectsCount = dirtyRects.size();
@@ -278,7 +274,7 @@ void CefRenderHandlerCToCpp::OnAcceleratedPaint(CefRefPtr<CefBrowser> browser,
 
   // Execute
   _struct->on_accelerated_paint(_struct, CefBrowserCppToC::Wrap(browser), type,
-                                dirtyRectsCount, dirtyRectsList, shared_handle);
+                                dirtyRectsCount, dirtyRectsList, &info);
 
   // Restore param:dirtyRects; type: simple_vec_byref_const
   if (dirtyRectsList) {

libcef_dll/ctocpp/render_handler_ctocpp.h

@@ -9,7 +9,7 @@
 // implementations. See the translator.README.txt file in the tools directory
 // for more information.
 //
-// $hash=b1028055c90d484e6548009d8bb6e69e06ac1d17$
+// $hash=ae20df54c0accee56380672fa4c7e501a0037348$
 //
 
 #ifndef CEF_LIBCEF_DLL_CTOCPP_RENDER_HANDLER_CTOCPP_H_
@@ -56,7 +56,7 @@ class CefRenderHandlerCToCpp
   void OnAcceleratedPaint(CefRefPtr<CefBrowser> browser,
                           PaintElementType type,
                           const RectList& dirtyRects,
-                          void* shared_handle) override;
+                          const CefAcceleratedPaintInfo& info) override;
   void GetTouchHandleSize(CefRefPtr<CefBrowser> browser,
                           cef_horizontal_alignment_t orientation,
                           CefSize& size) override;

patch/patch.cfg

@@ -772,5 +772,14 @@ patches = [
     # views: mac: Add customization point to acceptsFirstMouse.
     # https://github.com/chromiumembedded/cef/issues/3680
     'name': 'mac_render_widget_3680'
+  },
+  {
+    # win: Remove keyed mutex with OSR for better performace and to avoid
+    # potential vendor driver bugs.
+    # https://bitbucket.org/chromiumembedded/cef/pull-requests/734
+    # https://github.com/chromiumembedded/cef/issues/2575
+    # It is a bit hacky, not suitable for merging into upstream.
+    # https://chromium-review.googlesource.com/c/chromium/src/+/5302103
+    'name': 'osr_win_remove_keyed_mutex_2575'
   }
 ]

patch/patches/osr_win_remove_keyed_mutex_2575.patch

@@ -0,0 +1,71 @@
+diff --git gpu/ipc/service/gpu_memory_buffer_factory_dxgi.cc gpu/ipc/service/gpu_memory_buffer_factory_dxgi.cc
+index ecabd51db586d..a7ae5e101ca02 100644
+--- gpu/ipc/service/gpu_memory_buffer_factory_dxgi.cc
++++ gpu/ipc/service/gpu_memory_buffer_factory_dxgi.cc
+@@ -174,7 +174,8 @@ gfx::GpuMemoryBufferHandle GpuMemoryBufferFactoryDXGI::CreateGpuMemoryBuffer(
+   // so make sure that the usage is one that we support.
+   DCHECK(usage == gfx::BufferUsage::GPU_READ ||
+          usage == gfx::BufferUsage::SCANOUT ||
+-         usage == gfx::BufferUsage::SCANOUT_CPU_READ_WRITE)
++         usage == gfx::BufferUsage::SCANOUT_CPU_READ_WRITE ||
++         usage == gfx::BufferUsage::SCANOUT_VEA_CPU_READ)
+       << "Incorrect usage, usage=" << gfx::BufferUsageToString(usage);
+ 
+   D3D11_TEXTURE2D_DESC desc = {
+@@ -188,7 +189,9 @@ gfx::GpuMemoryBufferHandle GpuMemoryBufferFactoryDXGI::CreateGpuMemoryBuffer(
+       D3D11_BIND_SHADER_RESOURCE | D3D11_BIND_RENDER_TARGET,
+       0,
+       D3D11_RESOURCE_MISC_SHARED_NTHANDLE |
+-          D3D11_RESOURCE_MISC_SHARED_KEYEDMUTEX};
++          static_cast<UINT>(usage == gfx::BufferUsage::SCANOUT_VEA_CPU_READ
++               ? D3D11_RESOURCE_MISC_SHARED
++               : D3D11_RESOURCE_MISC_SHARED_KEYEDMUTEX)};
+ 
+   Microsoft::WRL::ComPtr<ID3D11Texture2D> d3d11_texture;
+ 
+diff --git media/video/renderable_gpu_memory_buffer_video_frame_pool.cc media/video/renderable_gpu_memory_buffer_video_frame_pool.cc
+index 15b1d849d27cd..4887e6482b0f6 100644
+--- media/video/renderable_gpu_memory_buffer_video_frame_pool.cc
++++ media/video/renderable_gpu_memory_buffer_video_frame_pool.cc
+@@ -205,7 +205,7 @@ gfx::Size GetBufferSizeInPixelsForVideoPixelFormat(
+ bool FrameResources::Initialize() {
+   auto* context = pool_->GetContext();
+ 
+-  constexpr gfx::BufferUsage kBufferUsage =
++  gfx::BufferUsage buffer_usage =
+ #if BUILDFLAG(IS_MAC) || BUILDFLAG(IS_CHROMEOS)
+       gfx::BufferUsage::SCANOUT_VEA_CPU_READ
+ #else
+@@ -219,13 +219,30 @@ bool FrameResources::Initialize() {
+   const gfx::Size buffer_size_in_pixels =
+       GetBufferSizeInPixelsForVideoPixelFormat(format_, coded_size_);
+ 
++#if BUILDFLAG(IS_WIN)
++  // For CEF OSR feature, currently there's no other place in chromium use RGBA.
++  // If the format is RGBA, currently CEF do not write to the texture anymore
++  // once the GMB is returned from CopyRequest. So there will be no race
++  // condition on that texture. We can request a GMB without a keyed mutex to
++  // accelerate and probably prevent some driver deadlock.
++  if (format_ == PIXEL_FORMAT_ARGB) {
++    // This value is 'borrowed', SCANOUT_VEA_CPU_READ is probably invalid
++    // cause there's no real SCANOUT on Windows. We simply use this enum as a
++    // flag to disable mutex in the GMBFactoryDXGI because this enum is also
++    // used above in macOS and CrOS for similar usage (claim no other one will
++    // concurrently use the resource).
++    // https://chromium-review.googlesource.com/c/chromium/src/+/5302103
++    buffer_usage = gfx::BufferUsage::SCANOUT_VEA_CPU_READ;
++  }
++#endif
++
+   // Create the GpuMemoryBuffer.
+   gpu_memory_buffer_ = context->CreateGpuMemoryBuffer(
+-      buffer_size_in_pixels, buffer_format, kBufferUsage);
++      buffer_size_in_pixels, buffer_format, buffer_usage);
+   if (!gpu_memory_buffer_) {
+     DLOG(ERROR) << "Failed to allocate GpuMemoryBuffer for frame: coded_size="
+                 << coded_size_.ToString()
+-                << ", usage=" << static_cast<int>(kBufferUsage);
++                << ", usage=" << static_cast<int>(buffer_usage);
+     return false;
+   }
+ 

tests/cefclient/browser/browser_window_osr_gtk.cc

@@ -990,6 +990,11 @@ void BrowserWindowOsrGtk::CreateBrowser(
   CefWindowInfo window_info;
   window_info.SetAsWindowless(handle);
 
+  window_info.shared_texture_enabled =
+      renderer_.settings().shared_texture_enabled;
+  window_info.external_begin_frame_enabled =
+      renderer_.settings().external_begin_frame_enabled;
+
   // Windowless rendering requires Alloy style.
   DCHECK_EQ(CEF_RUNTIME_STYLE_ALLOY, window_info.runtime_style);
 
@@ -1010,6 +1015,11 @@ void BrowserWindowOsrGtk::GetPopupConfig(CefWindowHandle temp_handle,
   // Windowless rendering requires Alloy style.
   DCHECK_EQ(CEF_RUNTIME_STYLE_ALLOY, windowInfo.runtime_style);
 
+  windowInfo.shared_texture_enabled =
+      renderer_.settings().shared_texture_enabled;
+  windowInfo.external_begin_frame_enabled =
+      renderer_.settings().external_begin_frame_enabled;
+
   client = client_handler_;
 }
 

tests/cefclient/browser/browser_window_osr_mac.h

@@ -72,6 +72,10 @@ class BrowserWindowOsrMac : public BrowserWindow,
                const void* buffer,
                int width,
                int height) override;
+  void OnAcceleratedPaint(CefRefPtr<CefBrowser> browser,
+                          CefRenderHandler::PaintElementType type,
+                          const CefRenderHandler::RectList& dirtyRects,
+                          const CefAcceleratedPaintInfo& info) override;
   void OnCursorChange(CefRefPtr<CefBrowser> browser,
                       CefCursorHandle cursor,
                       cef_cursor_type_t type,

tests/cefclient/browser/browser_window_osr_mac.mm

@@ -78,6 +78,8 @@ class ScopedGLContext {
     }
   }
 
+  NSOpenGLContext* context() const { return context_; }
+
  private:
   NSOpenGLContext* context_;
   const bool swap_buffers_;
@@ -132,9 +134,6 @@ NSPoint ConvertPointFromWindowToScreen(NSWindow* window, NSPoint point) {
   return self;
 }
 
-// End disable NSOpenGL deprecation warnings.
-#pragma clang diagnostic pop
-
 - (void)dealloc {
   [[NSNotificationCenter defaultCenter]
       removeObserver:self
@@ -1388,6 +1387,10 @@ class BrowserWindowOsrMacImpl {
                const void* buffer,
                int width,
                int height);
+  void OnAcceleratedPaint(CefRefPtr<CefBrowser> browser,
+                          CefRenderHandler::PaintElementType type,
+                          const CefRenderHandler::RectList& dirtyRects,
+                          const CefAcceleratedPaintInfo& info);
   void OnCursorChange(CefRefPtr<CefBrowser> browser,
                       CefCursorHandle cursor,
                       cef_cursor_type_t type,
@@ -1453,6 +1456,11 @@ void BrowserWindowOsrMacImpl::CreateBrowser(
   window_info.SetAsWindowless(
       CAST_NSVIEW_TO_CEF_WINDOW_HANDLE(native_browser_view_));
 
+  window_info.shared_texture_enabled =
+      renderer_.settings().shared_texture_enabled;
+  window_info.external_begin_frame_enabled =
+      renderer_.settings().external_begin_frame_enabled;
+
   // Windowless rendering requires Alloy style.
   DCHECK_EQ(CEF_RUNTIME_STYLE_ALLOY, window_info.runtime_style);
 
@@ -1473,6 +1481,11 @@ void BrowserWindowOsrMacImpl::GetPopupConfig(CefWindowHandle temp_handle,
   // Windowless rendering requires Alloy style.
   DCHECK_EQ(CEF_RUNTIME_STYLE_ALLOY, windowInfo.runtime_style);
 
+  windowInfo.shared_texture_enabled =
+      renderer_.settings().shared_texture_enabled;
+  windowInfo.external_begin_frame_enabled =
+      renderer_.settings().external_begin_frame_enabled;
+
   client = browser_window_.client_handler_;
 }
 
@@ -1737,6 +1750,46 @@ void BrowserWindowOsrMacImpl::OnPaint(
   renderer_.Render();
 }
 
+void BrowserWindowOsrMacImpl::OnAcceleratedPaint(
+    CefRefPtr<CefBrowser> browser,
+    CefRenderHandler::PaintElementType type,
+    const CefRenderHandler::RectList& dirtyRects,
+    const CefAcceleratedPaintInfo& info) {
+  CEF_REQUIRE_UI_THREAD();
+  REQUIRE_MAIN_THREAD();
+
+  if (!native_browser_view_) {
+    return;
+  }
+
+  ScopedGLContext scoped_gl_context(native_browser_view_, true);
+
+  IOSurfaceRef io_surface = (IOSurfaceRef)info.shared_texture_io_surface;
+
+  GLuint rectTexture;
+  glGenTextures(1, &rectTexture);
+  glEnable(GL_TEXTURE_RECTANGLE_ARB);
+  glBindTexture(GL_TEXTURE_RECTANGLE_ARB, rectTexture);
+
+  CGLContextObj cgl_context = CGLGetCurrentContext();
+
+  GLsizei width = (GLsizei)IOSurfaceGetWidth(io_surface);
+  GLsizei height = (GLsizei)IOSurfaceGetHeight(io_surface);
+
+  CGLTexImageIOSurface2D(cgl_context, GL_TEXTURE_RECTANGLE_ARB, GL_RGBA8, width,
+                         height, GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV,
+                         io_surface, 0);
+
+  glTexParameteri(GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+  glTexParameteri(GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+
+  glBindTexture(GL_TEXTURE_RECTANGLE_ARB, 0);
+
+  renderer_.OnAcceleratedPaint(browser, type, dirtyRects, rectTexture, width,
+                               height);
+  renderer_.Render();
+}
+
 void BrowserWindowOsrMacImpl::OnCursorChange(
     CefRefPtr<CefBrowser> browser,
     CefCursorHandle cursor,
@@ -1963,6 +2016,14 @@ void BrowserWindowOsrMac::OnPaint(CefRefPtr<CefBrowser> browser,
   impl_->OnPaint(browser, type, dirtyRects, buffer, width, height);
 }
 
+void BrowserWindowOsrMac::OnAcceleratedPaint(
+    CefRefPtr<CefBrowser> browser,
+    CefRenderHandler::PaintElementType type,
+    const CefRenderHandler::RectList& dirtyRects,
+    const CefAcceleratedPaintInfo& info) {
+  impl_->OnAcceleratedPaint(browser, type, dirtyRects, info);
+}
+
 void BrowserWindowOsrMac::OnCursorChange(
     CefRefPtr<CefBrowser> browser,
     CefCursorHandle cursor,
@@ -2004,3 +2065,6 @@ void BrowserWindowOsrMac::UpdateAccessibilityLocation(
 }
 
 }  // namespace client
+
+// End disable NSOpenGL deprecation warnings.
+#pragma clang diagnostic pop

tests/cefclient/browser/client_handler_osr.cc

@@ -122,12 +122,12 @@ void ClientHandlerOsr::OnAcceleratedPaint(
     CefRefPtr<CefBrowser> browser,
     CefRenderHandler::PaintElementType type,
     const CefRenderHandler::RectList& dirtyRects,
-    void* share_handle) {
+    const CefAcceleratedPaintInfo& info) {
   CEF_REQUIRE_UI_THREAD();
   if (!osr_delegate_) {
     return;
   }
-  osr_delegate_->OnAcceleratedPaint(browser, type, dirtyRects, share_handle);
+  osr_delegate_->OnAcceleratedPaint(browser, type, dirtyRects, info);
 }
 
 bool ClientHandlerOsr::StartDragging(

tests/cefclient/browser/client_handler_osr.h

@@ -48,7 +48,7 @@ class ClientHandlerOsr : public ClientHandler,
         CefRefPtr<CefBrowser> browser,
         CefRenderHandler::PaintElementType type,
         const CefRenderHandler::RectList& dirtyRects,
-        void* share_handle) {}
+        const CefAcceleratedPaintInfo& info) {}
     virtual bool StartDragging(CefRefPtr<CefBrowser> browser,
                                CefRefPtr<CefDragData> drag_data,
                                CefRenderHandler::DragOperationsMask allowed_ops,
@@ -115,7 +115,7 @@ class ClientHandlerOsr : public ClientHandler,
   void OnAcceleratedPaint(CefRefPtr<CefBrowser> browser,
                           CefRenderHandler::PaintElementType type,
                           const CefRenderHandler::RectList& dirtyRects,
-                          void* share_handle) override;
+                          const CefAcceleratedPaintInfo& info) override;
   bool StartDragging(CefRefPtr<CefBrowser> browser,
                      CefRefPtr<CefDragData> drag_data,
                      CefRenderHandler::DragOperationsMask allowed_ops,

tests/cefclient/browser/main_context_impl.cc

@@ -64,24 +64,16 @@ MainContextImpl::MainContextImpl(CefRefPtr<CefCommandLine> command_line,
       use_windowless_rendering_ &&
       command_line_->HasSwitch(switches::kTransparentPaintingEnabled);
 
-#if defined(OS_WIN)
-  // Shared texture is only supported on Windows.
   shared_texture_enabled_ =
       use_windowless_rendering_ &&
       command_line_->HasSwitch(switches::kSharedTextureEnabled);
-#endif
 
   external_begin_frame_enabled_ =
       use_windowless_rendering_ &&
       command_line_->HasSwitch(switches::kExternalBeginFrameEnabled);
 
   if (windowless_frame_rate_ <= 0) {
-// Choose a reasonable default rate based on the OSR mode.
-#if defined(OS_WIN)
     windowless_frame_rate_ = shared_texture_enabled_ ? 60 : 30;
-#else
-    windowless_frame_rate_ = 30;
-#endif
   }
 
   // Enable Chrome runtime bootstrap. See issue #2969 for details.
@@ -264,9 +256,7 @@ void MainContextImpl::PopulateOsrSettings(OsrRendererSettings* settings) {
   settings->show_update_rect =
       command_line_->HasSwitch(switches::kShowUpdateRect);
 
-#if defined(OS_WIN)
   settings->shared_texture_enabled = shared_texture_enabled_;
-#endif
   settings->external_begin_frame_enabled = external_begin_frame_enabled_;
   settings->begin_frame_rate = windowless_frame_rate_;
 

tests/cefclient/browser/main_context_impl.h

@@ -79,9 +79,7 @@ class MainContextImpl : public MainContext {
 
   std::unique_ptr<RootWindowManager> root_window_manager_;
 
-#if defined(OS_WIN)
   bool shared_texture_enabled_;
-#endif
 
   bool external_begin_frame_enabled_;
 

tests/cefclient/browser/osr_d3d11_win.cc

@@ -23,6 +23,7 @@
 #endif
 #include <d3dcompiler.h>
 #include <directxmath.h>
+#include <wrl/client.h>
 
 #include "include/base/cef_logging.h"
 #include "include/internal/cef_string.h"
@@ -568,10 +569,18 @@ std::shared_ptr<Geometry> Device::create_quad(float x,
 }
 
 std::shared_ptr<Texture2D> Device::open_shared_texture(void* handle) {
-  ID3D11Texture2D* tex = nullptr;
-  auto hr = device_->OpenSharedResource(handle, __uuidof(ID3D11Texture2D),
-                                        (void**)(&tex));
+  Microsoft::WRL::ComPtr<ID3D11Device1> device1;
+  HRESULT hr = device_->QueryInterface(IID_PPV_ARGS(&device1));
   if (FAILED(hr)) {
+    LOG(FATAL) << "Failed to open D3D11_1 device. hr=" << std::hex << hr;
+    return nullptr;
+  }
+
+  // Open texture on device using shared handle
+  ID3D11Texture2D* tex = nullptr;
+  hr = device1->OpenSharedResource1(handle, IID_PPV_ARGS(&tex));
+  if (FAILED(hr)) {
+    LOG(FATAL) << "Failed to open shared texture. hr=" << std::hex << hr;
     return nullptr;
   }
 

tests/cefclient/browser/osr_render_handler_win.h

@@ -48,7 +48,7 @@ class OsrRenderHandlerWin {
   virtual void OnAcceleratedPaint(CefRefPtr<CefBrowser> browser,
                                   CefRenderHandler::PaintElementType type,
                                   const CefRenderHandler::RectList& dirtyRects,
-                                  void* share_handle) = 0;
+                                  const CefAcceleratedPaintInfo& info) = 0;
 
   bool send_begin_frame() const {
     return settings_.external_begin_frame_enabled;

tests/cefclient/browser/osr_render_handler_win_d3d11.cc

@@ -12,7 +12,7 @@
 namespace client {
 
 BrowserLayer::BrowserLayer(const std::shared_ptr<d3d11::Device>& device)
-    : d3d11::Layer(device, true /* flip */) {
+    : d3d11::Layer(device, false /* flip */) {
   frame_buffer_ = std::make_shared<d3d11::FrameBuffer>(device_);
 }
 
@@ -189,13 +189,13 @@ void OsrRenderHandlerWinD3D11::OnAcceleratedPaint(
     CefRefPtr<CefBrowser> browser,
     CefRenderHandler::PaintElementType type,
     const CefRenderHandler::RectList& dirtyRects,
-    void* share_handle) {
+    const CefAcceleratedPaintInfo& info) {
   CEF_REQUIRE_UI_THREAD();
 
   if (type == PET_POPUP) {
-    popup_layer_->on_paint(share_handle);
+    popup_layer_->on_paint(info.shared_texture_handle);
   } else {
-    browser_layer_->on_paint(share_handle);
+    browser_layer_->on_paint(info.shared_texture_handle);
   }
 
   Render();

tests/cefclient/browser/osr_render_handler_win_d3d11.h

@@ -70,7 +70,7 @@ class OsrRenderHandlerWinD3D11 : public OsrRenderHandlerWin {
   void OnAcceleratedPaint(CefRefPtr<CefBrowser> browser,
                           CefRenderHandler::PaintElementType type,
                           const CefRenderHandler::RectList& dirtyRects,
-                          void* share_handle) override;
+                          const CefAcceleratedPaintInfo& info) override;
 
  private:
   void Render() override;

tests/cefclient/browser/osr_render_handler_win_gl.cc

@@ -131,7 +131,7 @@ void OsrRenderHandlerWinGL::OnAcceleratedPaint(
     CefRefPtr<CefBrowser> browser,
     CefRenderHandler::PaintElementType type,
     const CefRenderHandler::RectList& dirtyRects,
-    void* share_handle) {
+    const CefAcceleratedPaintInfo& info) {
   // Not used with this implementation.
   NOTREACHED();
 }

tests/cefclient/browser/osr_render_handler_win_gl.h

@@ -35,7 +35,7 @@ class OsrRenderHandlerWinGL : public OsrRenderHandlerWin {
   void OnAcceleratedPaint(CefRefPtr<CefBrowser> browser,
                           CefRenderHandler::PaintElementType type,
                           const CefRenderHandler::RectList& dirtyRects,
-                          void* share_handle) override;
+                          const CefAcceleratedPaintInfo& info) override;
 
  private:
   void Render() override;

tests/cefclient/browser/osr_renderer.cc

@@ -4,6 +4,12 @@
 
 #include "tests/cefclient/browser/osr_renderer.h"
 
+#if !defined(OS_WIN)
+// Begin disable NSOpenGL deprecation warnings.
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wdeprecated-declarations"
+#endif
+
 #if USE_SHADERS
 // Expose prototypes for OpenGL shader functions.
 #define GL_GLEXT_PROTOTYPES
@@ -14,7 +20,6 @@
 #if defined(OS_WIN)
 #include <gl/gl.h>
 #elif defined(OS_MAC)
-#define GL_SILENCE_DEPRECATION
 #if USE_SHADERS
 #include <OpenGL/gl3.h>
 #else
@@ -755,6 +760,210 @@ void OsrRenderer::ClearPopupRects() {
   original_popup_rect_.Set(0, 0, 0, 0);
 }
 
+void OsrRenderer::OnAcceleratedPaint(
+    CefRefPtr<CefBrowser> browser,
+    CefRenderHandler::PaintElementType type,
+    const CefRenderHandler::RectList& dirtyRects,
+    unsigned int io_surface_tex,
+    int width,
+    int height) {
+  if (!initialized_) {
+    Initialize();
+  }
+
+#if !defined(OS_WIN)
+  if (width != view_width_ || height != view_height_) {
+    // Width or height has changed, so proceed to update the texture
+    view_width_ = width;
+    view_height_ = height;
+
+    // Rebind texture_id as the active texture
+    glBindTexture(GL_TEXTURE_2D, texture_id_);
+    VERIFY_NO_ERROR;
+
+    // Allocate a new storage for texture_id with the new dimensions
+    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, width, height, 0, GL_BGRA,
+                 GL_UNSIGNED_INT_8_8_8_8_REV, NULL);
+    VERIFY_NO_ERROR;
+  }
+
+  if (IsTransparent()) {
+    glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+    VERIFY_NO_ERROR;
+
+    // Enable alpha blending.
+    glEnable(GL_BLEND);
+    VERIFY_NO_ERROR;
+  }
+
+  GLuint framebuffer;
+  glGenFramebuffers(1, &framebuffer);
+  VERIFY_NO_ERROR;
+  glBindFramebuffer(GL_FRAMEBUFFER, framebuffer);
+  VERIFY_NO_ERROR;
+  glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D,
+                         texture_id_, 0);
+  VERIFY_NO_ERROR;
+
+  // Check framebuffer status
+  DCHECK(glCheckFramebufferStatus(GL_FRAMEBUFFER) == GL_FRAMEBUFFER_COMPLETE);
+
+  glPushAttrib(GL_ALL_ATTRIB_BITS);
+  VERIFY_NO_ERROR;
+  glPushClientAttrib(GL_CLIENT_ALL_ATTRIB_BITS);
+  VERIFY_NO_ERROR;
+
+  // Setup OpenGL states
+  glViewport(0, 0, width, height);
+  VERIFY_NO_ERROR;
+
+  // Bind the GL_TEXTURE_RECTANGLE_ARB texture
+  glActiveTexture(GL_TEXTURE0);
+  VERIFY_NO_ERROR;
+
+  glClientActiveTexture(GL_TEXTURE0);
+  VERIFY_NO_ERROR;
+
+  glMatrixMode(GL_TEXTURE);
+  VERIFY_NO_ERROR;
+  glPushMatrix();
+  VERIFY_NO_ERROR;
+  glLoadIdentity();
+  VERIFY_NO_ERROR;
+
+  glMatrixMode(GL_PROJECTION);
+  VERIFY_NO_ERROR;
+  glPushMatrix();
+  VERIFY_NO_ERROR;
+  glLoadIdentity();
+  VERIFY_NO_ERROR;
+  glOrtho(0, width, 0, height, -1, 1);
+  VERIFY_NO_ERROR;
+
+  glMatrixMode(GL_MODELVIEW);
+  VERIFY_NO_ERROR;
+  glPushMatrix();
+  VERIFY_NO_ERROR;
+  glLoadIdentity();
+  VERIFY_NO_ERROR;
+
+  // rectangleTexture is the GL_TEXTURE_RECTANGLE_ARB
+  glBindTexture(GL_TEXTURE_RECTANGLE_ARB, io_surface_tex);
+  VERIFY_NO_ERROR;
+
+  glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
+  VERIFY_NO_ERROR;
+  glColor4f(1.0, 1.0, 1.0, 1.0);
+  VERIFY_NO_ERROR;
+
+  bool isFlipped = false;
+
+  GLfloat tex_coords[8];
+
+  GLfloat texOriginX = 0;
+  GLfloat texOriginY = 0;
+  GLfloat texExtentX = width;
+  GLfloat texExtentY = height;
+
+  // X
+  tex_coords[0] = texOriginX;
+  tex_coords[2] = texOriginX;
+  tex_coords[4] = texExtentX;
+  tex_coords[6] = texExtentX;
+
+  // Y
+  if (!isFlipped) {
+    tex_coords[1] = texOriginY;
+    tex_coords[3] = texExtentY;
+    tex_coords[5] = texExtentY;
+    tex_coords[7] = texOriginY;
+  } else {
+    tex_coords[1] = texExtentY;
+    tex_coords[3] = texOriginY;
+    tex_coords[5] = texOriginY;
+    tex_coords[7] = texExtentY;
+  }
+
+  GLfloat verts[] = {
+      0.0f,         0.0f,          0.0f,         (float)height,
+      (float)width, (float)height, (float)width, 0.0f,
+  };
+
+  // Ought to cache the GL_ARRAY_BUFFER_BINDING,
+  // GL_ELEMENT_ARRAY_BUFFER_BINDING, set buffer to 0, and reset
+  GLint arrayBuffer, elementArrayBuffer;
+  glGetIntegerv(GL_ELEMENT_ARRAY_BUFFER_BINDING, &elementArrayBuffer);
+  VERIFY_NO_ERROR;
+  glGetIntegerv(GL_ARRAY_BUFFER_BINDING, &arrayBuffer);
+  VERIFY_NO_ERROR;
+
+  glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
+  VERIFY_NO_ERROR;
+  glBindBuffer(GL_ARRAY_BUFFER, 0);
+  VERIFY_NO_ERROR;
+
+  glEnableClientState(GL_TEXTURE_COORD_ARRAY);
+  VERIFY_NO_ERROR;
+  glTexCoordPointer(2, GL_FLOAT, 0, tex_coords);
+  VERIFY_NO_ERROR;
+  glEnableClientState(GL_VERTEX_ARRAY);
+  VERIFY_NO_ERROR;
+  glVertexPointer(2, GL_FLOAT, 0, verts);
+  VERIFY_NO_ERROR;
+  glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
+  VERIFY_NO_ERROR;
+
+  glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, elementArrayBuffer);
+  VERIFY_NO_ERROR;
+  glBindBuffer(GL_ARRAY_BUFFER, arrayBuffer);
+  VERIFY_NO_ERROR;
+
+  glBindTexture(GL_TEXTURE_RECTANGLE_ARB, 0);
+  VERIFY_NO_ERROR;
+
+  // Restore OpenGL states
+  glMatrixMode(GL_MODELVIEW);
+  VERIFY_NO_ERROR;
+  glPopMatrix();
+  VERIFY_NO_ERROR;
+
+  glMatrixMode(GL_PROJECTION);
+  VERIFY_NO_ERROR;
+  glPopMatrix();
+  VERIFY_NO_ERROR;
+
+  glMatrixMode(GL_TEXTURE);
+  VERIFY_NO_ERROR;
+  glPopMatrix();
+  VERIFY_NO_ERROR;
+
+  glPopClientAttrib();
+  VERIFY_NO_ERROR;
+  glPopAttrib();
+  VERIFY_NO_ERROR;
+
+  if (IsTransparent()) {
+    // Enable alpha blending.
+    glDisable(GL_BLEND);
+    VERIFY_NO_ERROR;
+  }
+
+  // 0 unbinds the FBO, reverting to the default buffer
+  glBindFramebuffer(GL_FRAMEBUFFER, 0);
+  VERIFY_NO_ERROR;
+
+  glDeleteFramebuffers(1, &framebuffer);
+  VERIFY_NO_ERROR;
+
+  // Delete the rectangle texture
+  glDeleteTextures(1, &io_surface_tex);
+  VERIFY_NO_ERROR;
+
+  glDisable(GL_TEXTURE_RECTANGLE_ARB);
+  VERIFY_NO_ERROR;
+#endif  // !defined(OS_WIN)
+}
+
 void OsrRenderer::OnPaint(CefRefPtr<CefBrowser> browser,
                           CefRenderHandler::PaintElementType type,
                           const CefRenderHandler::RectList& dirtyRects,
@@ -882,3 +1091,8 @@ void OsrRenderer::IncrementSpin(float spinDX, float spinDY) {
 }
 
 }  // namespace client
+
+#if !defined(OS_WIN)
+// End disable NSOpenGL deprecation warnings.
+#pragma clang diagnostic pop
+#endif

tests/cefclient/browser/osr_renderer.h

@@ -49,6 +49,14 @@ class OsrRenderer {
                int width,
                int height);
 
+  // Used when rendering with shared textures.
+  void OnAcceleratedPaint(CefRefPtr<CefBrowser> browser,
+                          CefRenderHandler::PaintElementType type,
+                          const CefRenderHandler::RectList& dirtyRects,
+                          unsigned int io_surface_tex,
+                          int width,
+                          int height);
+
   // Apply spin.
   void SetSpin(float spinX, float spinY);
   void IncrementSpin(float spinDX, float spinDY);
@@ -61,6 +69,8 @@ class OsrRenderer {
 
   void ClearPopupRects();
 
+  const OsrRendererSettings& settings() const { return settings_; }
+
  private:
   CefRect GetPopupRectInWebView(const CefRect& original_rect);
 

tests/cefclient/browser/osr_window_win.cc

@@ -1043,9 +1043,9 @@ void OsrWindowWin::OnAcceleratedPaint(
     CefRefPtr<CefBrowser> browser,
     CefRenderHandler::PaintElementType type,
     const CefRenderHandler::RectList& dirtyRects,
-    void* share_handle) {
+    const CefAcceleratedPaintInfo& info) {
   EnsureRenderHandler();
-  render_handler_->OnAcceleratedPaint(browser, type, dirtyRects, share_handle);
+  render_handler_->OnAcceleratedPaint(browser, type, dirtyRects, info);
 }
 
 void OsrWindowWin::OnCursorChange(CefRefPtr<CefBrowser> browser,

tests/cefclient/browser/osr_window_win.h

@@ -130,7 +130,7 @@ class OsrWindowWin
   void OnAcceleratedPaint(CefRefPtr<CefBrowser> browser,
                           CefRenderHandler::PaintElementType type,
                           const CefRenderHandler::RectList& dirtyRects,
-                          void* share_handle) override;
+                          const CefAcceleratedPaintInfo& info) override;
   void OnCursorChange(CefRefPtr<CefBrowser> browser,
                       CefCursorHandle cursor,
                       cef_cursor_type_t type,

tools/cef_parser.py

@@ -29,7 +29,10 @@ def wrap_text(text, indent='', maxchars=80, listitem=False):
   else:
     initial_indent = indent
     subsequent_indent = indent
-  lines = textwrap.wrap(text, maxchars, initial_indent=initial_indent,
+  lines = textwrap.wrap(
+      text,
+      maxchars,
+      initial_indent=initial_indent,
       subsequent_indent=subsequent_indent)
   return '\n'.join(lines) + '\n'
 
@@ -187,7 +190,7 @@ def format_comment(comment, indent, translate_map=None, maxchars=80):
           else:
             result += line
         result += '\n'
-        listitem = False;
+        listitem = False
       else:
         if not listitem:
           # add to the current paragraph
@@ -395,6 +398,9 @@ _simpletypes = {
     'char* const': ['char* const', 'NULL'],
     'cef_color_t': ['cef_color_t', '0'],
     'cef_json_parser_error_t': ['cef_json_parser_error_t', 'JSON_NO_ERROR'],
+    'CefAcceleratedPaintInfo': [
+        'cef_accelerated_paint_info_t', 'CefAcceleratedPaintInfo()'
+    ],
     'CefAudioParameters': ['cef_audio_parameters_t', 'CefAudioParameters()'],
     'CefBaseTime': ['cef_basetime_t', 'CefBaseTime()'],
     'CefBoxLayoutSettings': [