Revert of Refactor content/common/gpu into gpu/ipc/service

content/common/gpu/image_transport_surface_overlay_mac.mm

Index: content/common/gpu/image_transport_surface_overlay_mac.mm
diff --git a/content/common/gpu/image_transport_surface_overlay_mac.mm b/content/common/gpu/image_transport_surface_overlay_mac.mm
new file mode 100644
index 0000000000000000000000000000000000000000..0cf26dfee85383a031671350a1461b754183c8b3
--- /dev/null
+++ b/content/common/gpu/image_transport_surface_overlay_mac.mm
@@ -0,0 +1,563 @@
+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "content/common/gpu/image_transport_surface_overlay_mac.h"
+
+#include <CoreGraphics/CoreGraphics.h>
+#include <IOSurface/IOSurface.h>
+#include <OpenGL/CGLRenderers.h>
+#include <OpenGL/CGLTypes.h>
+#include <OpenGL/gl.h>
+#include <stddef.h>
+
+#include <algorithm>
+
+// This type consistently causes problem on Mac, and needs to be dealt with
+// in a systemic way.
+// http://crbug.com/517208
+#ifndef GL_OES_EGL_image
+typedef void* GLeglImageOES;
+#endif
+
+#include "base/bind.h"
+#include "base/bind_helpers.h"
+#include "base/mac/scoped_cftyperef.h"
+#include "base/trace_event/trace_event.h"
+#include "content/common/gpu/ca_layer_partial_damage_tree_mac.h"
+#include "content/common/gpu/ca_layer_tree_mac.h"
+#include "content/common/gpu/gpu_channel_manager.h"
+#include "content/common/gpu/gpu_channel_manager_delegate.h"
+#include "ui/accelerated_widget_mac/io_surface_context.h"
+#include "ui/base/cocoa/animation_utils.h"
+#include "ui/base/cocoa/remote_layer_api.h"
+#include "ui/gfx/geometry/rect_conversions.h"
+#include "ui/gfx/transform.h"
+#include "ui/gl/gl_context.h"
+#include "ui/gl/gl_fence.h"
+#include "ui/gl/gl_image_io_surface.h"
+#include "ui/gl/gpu_switching_manager.h"
+#include "ui/gl/scoped_api.h"
+#include "ui/gl/scoped_cgl.h"
+
+namespace {
+
+// Don't let a frame draw until 5% of the way through the next vsync interval
+// after the call to SwapBuffers. This slight offset is to ensure that skew
+// doesn't result in the frame being presented to the previous vsync interval.
+const double kVSyncIntervalFractionForEarliestDisplay = 0.05;
+
+// After doing a glFlush and putting in a fence in SwapBuffers, post a task to
+// query the fence 50% of the way through the next vsync interval. If we are
+// trying to animate smoothly, then want to query the fence at the next
+// SwapBuffers. For this reason we schedule the callback for a long way into
+// the next frame.
+const double kVSyncIntervalFractionForDisplayCallback = 0.5;
+
+// If swaps arrive regularly and nearly at the vsync rate, then attempt to
+// make animation smooth (each frame is shown for one vsync interval) by sending
+// them to the window server only when their GL work completes. If frames are
+// not coming in with each vsync, then just throw them at the window server as
+// they come.
+const double kMaximumVSyncsBetweenSwapsForSmoothAnimation = 1.5;
+
+void CheckGLErrors(const char* msg) {
+  GLenum gl_error;
+  while ((gl_error = glGetError()) != GL_NO_ERROR) {
+    LOG(ERROR) << "OpenGL error hit " << msg << ": " << gl_error;
+  }
+}
+
+void IOSurfaceContextNoOp(scoped_refptr<ui::IOSurfaceContext>) {
+}
+
+}  // namespace
+
+@interface CALayer(Private)
+-(void)setContentsChanged;
+@end
+
+namespace content {
+
+scoped_refptr<gfx::GLSurface> ImageTransportSurfaceCreateNativeSurface(
+    GpuChannelManager* manager,
+    GpuCommandBufferStub* stub,
+    gpu::SurfaceHandle handle) {
+  return new ImageTransportSurfaceOverlayMac(manager, stub, handle);
+}
+
+class ImageTransportSurfaceOverlayMac::PendingSwap {
+ public:
+  PendingSwap() {}
+  ~PendingSwap() { DCHECK(!gl_fence); }
+
+  gfx::Size pixel_size;
+  float scale_factor;
+  gfx::Rect pixel_damage_rect;
+
+  scoped_ptr<CALayerPartialDamageTree> partial_damage_tree;
+  scoped_ptr<CALayerTree> ca_layer_tree;
+  std::vector<ui::LatencyInfo> latency_info;
+
+  // A fence object, and the CGL context it was issued in.
+  base::ScopedTypeRef<CGLContextObj> cgl_context;
+  scoped_ptr<gfx::GLFence> gl_fence;
+
+  // The earliest time that this frame may be drawn. A frame is not allowed
+  // to draw until a fraction of the way through the vsync interval after its
+  // This extra latency is to allow wiggle-room for smoothness.
+  base::TimeTicks earliest_display_time_allowed;
+
+  // The time that this will wake up and draw, if a following swap does not
+  // cause it to draw earlier.
+  base::TimeTicks target_display_time;
+};
+
+ImageTransportSurfaceOverlayMac::ImageTransportSurfaceOverlayMac(
+    GpuChannelManager* manager,
+    GpuCommandBufferStub* stub,
+    gpu::SurfaceHandle handle)
+    : manager_(manager),
+      stub_(stub->AsWeakPtr()),
+      handle_(handle),
+      use_remote_layer_api_(ui::RemoteLayerAPISupported()),
+      scale_factor_(1),
+      gl_renderer_id_(0),
+      vsync_parameters_valid_(false),
+      display_pending_swap_timer_(true, false),
+      weak_factory_(this) {
+  manager_->AddBufferPresentedCallback(
+      handle_, base::Bind(&ImageTransportSurfaceOverlayMac::BufferPresented,
+                          base::Unretained(this)));
+  ui::GpuSwitchingManager::GetInstance()->AddObserver(this);
+}
+
+ImageTransportSurfaceOverlayMac::~ImageTransportSurfaceOverlayMac() {
+  ui::GpuSwitchingManager::GetInstance()->RemoveObserver(this);
+  if (stub_.get()) {
+    stub_->SetLatencyInfoCallback(
+        base::Callback<void(const std::vector<ui::LatencyInfo>&)>());
+  }
+  Destroy();
+  manager_->RemoveBufferPresentedCallback(handle_);
+}
+
+bool ImageTransportSurfaceOverlayMac::Initialize(
+    gfx::GLSurface::Format format) {
+  if (!stub_.get() || !stub_->decoder())
+    return false;
+
+  stub_->SetLatencyInfoCallback(
+      base::Bind(&ImageTransportSurfaceOverlayMac::SetLatencyInfo,
+                 base::Unretained(this)));
+
+  // Create the CAContext to send this to the GPU process, and the layer for
+  // the context.
+  if (use_remote_layer_api_) {
+    CGSConnectionID connection_id = CGSMainConnectionID();
+    ca_context_.reset([
+        [CAContext contextWithCGSConnection:connection_id options:@{}] retain]);
+    ca_root_layer_.reset([[CALayer alloc] init]);
+    [ca_root_layer_ setGeometryFlipped:YES];
+    [ca_root_layer_ setOpaque:YES];
+    [ca_context_ setLayer:ca_root_layer_];
+  }
+  return true;
+}
+
+void ImageTransportSurfaceOverlayMac::Destroy() {
+  DisplayAndClearAllPendingSwaps();
+
+  current_partial_damage_tree_.reset();
+  current_ca_layer_tree_.reset();
+}
+
+bool ImageTransportSurfaceOverlayMac::IsOffscreen() {
+  return false;
+}
+
+void ImageTransportSurfaceOverlayMac::SetLatencyInfo(
+    const std::vector<ui::LatencyInfo>& latency_info) {
+  latency_info_.insert(latency_info_.end(), latency_info.begin(),
+                       latency_info.end());
+}
+
+void ImageTransportSurfaceOverlayMac::BufferPresented(
+    int32_t surface_id,
+    const base::TimeTicks& vsync_timebase,
+    const base::TimeDelta& vsync_interval) {
+  vsync_timebase_ = vsync_timebase;
+  vsync_interval_ = vsync_interval;
+  vsync_parameters_valid_ = (vsync_interval_ != base::TimeDelta());
+
+  // Compute |vsync_timebase_| to be the first vsync after time zero.
+  if (vsync_parameters_valid_) {
+    vsync_timebase_ -=
+        vsync_interval_ *
+        ((vsync_timebase_ - base::TimeTicks()) / vsync_interval_);
+  }
+}
+
+void ImageTransportSurfaceOverlayMac::SendAcceleratedSurfaceBuffersSwapped(
+    int32_t surface_id,
+    CAContextID ca_context_id,
+    const gfx::ScopedRefCountedIOSurfaceMachPort& io_surface,
+    const gfx::Size& size,
+    float scale_factor,
+    std::vector<ui::LatencyInfo> latency_info) {
+  // TRACE_EVENT for gpu tests:
+  TRACE_EVENT_INSTANT2("test_gpu", "SwapBuffers", TRACE_EVENT_SCOPE_THREAD,
+                       "GLImpl", static_cast<int>(gfx::GetGLImplementation()),
+                       "width", size.width());
+  // On mac, handle_ is a surface id. See
+  // GpuProcessTransportFactory::CreatePerCompositorData
+  manager_->delegate()->SendAcceleratedSurfaceBuffersSwapped(
+      surface_id, ca_context_id, io_surface, size, scale_factor,
+      std::move(latency_info));
+}
+
+gfx::SwapResult ImageTransportSurfaceOverlayMac::SwapBuffersInternal(
+    const gfx::Rect& pixel_damage_rect) {
+  TRACE_EVENT0("gpu", "ImageTransportSurfaceOverlayMac::SwapBuffersInternal");
+
+  // Use the same concept of 'now' for the entire function. The duration of
+  // this function only affect the result if this function lasts across a vsync
+  // boundary, in which case smooth animation is out the window anyway.
+  const base::TimeTicks now = base::TimeTicks::Now();
+
+  // Decide if the frame should be drawn immediately, or if we should wait until
+  // its work finishes before drawing immediately.
+  bool display_immediately = false;
+  if (vsync_parameters_valid_ &&
+      now - last_swap_time_ >
+          kMaximumVSyncsBetweenSwapsForSmoothAnimation * vsync_interval_) {
+    display_immediately = true;
+  }
+  last_swap_time_ = now;
+
+  // If the previous swap is ready to display, do it before flushing the
+  // new swap. It is desirable to always be hitting this path when trying to
+  // animate smoothly with vsync.
+  if (!pending_swaps_.empty()) {
+    if (IsFirstPendingSwapReadyToDisplay(now))
+      DisplayFirstPendingSwapImmediately();
+  }
+
+  // The remainder of the function will populate the PendingSwap structure and
+  // then enqueue it.
+  linked_ptr<PendingSwap> new_swap(new PendingSwap);
+  new_swap->pixel_size = pixel_size_;
+  new_swap->scale_factor = scale_factor_;
+  new_swap->pixel_damage_rect = pixel_damage_rect;
+  new_swap->partial_damage_tree.swap(pending_partial_damage_tree_);
+  new_swap->ca_layer_tree.swap(pending_ca_layer_tree_);
+  new_swap->latency_info.swap(latency_info_);
+
+  // A flush is required to ensure that all content appears in the layer.
+  {
+    gfx::ScopedSetGLToRealGLApi scoped_set_gl_api;
+    TRACE_EVENT0("gpu", "ImageTransportSurfaceOverlayMac::glFlush");
+    CheckGLErrors("before flushing frame");
+    new_swap->cgl_context.reset(CGLGetCurrentContext(),
+                                base::scoped_policy::RETAIN);
+    if (gfx::GLFence::IsSupported() && !display_immediately)
+      new_swap->gl_fence.reset(gfx::GLFence::Create());
+    else
+      glFlush();
+    CheckGLErrors("while flushing frame");
+  }
+
+  // Compute the deadlines for drawing this frame.
+  if (display_immediately) {
+    new_swap->earliest_display_time_allowed = now;
+    new_swap->target_display_time = now;
+  } else {
+    new_swap->earliest_display_time_allowed =
+        GetNextVSyncTimeAfter(now, kVSyncIntervalFractionForEarliestDisplay);
+    new_swap->target_display_time =
+        GetNextVSyncTimeAfter(now, kVSyncIntervalFractionForDisplayCallback);
+  }
+
+  pending_swaps_.push_back(new_swap);
+  if (display_immediately)
+    DisplayFirstPendingSwapImmediately();
+  else
+    PostCheckPendingSwapsCallbackIfNeeded(now);
+  return gfx::SwapResult::SWAP_ACK;
+}
+
+bool ImageTransportSurfaceOverlayMac::IsFirstPendingSwapReadyToDisplay(
+    const base::TimeTicks& now) {
+  DCHECK(!pending_swaps_.empty());
+  linked_ptr<PendingSwap> swap = pending_swaps_.front();
+
+  // Frames are disallowed from drawing until the vsync interval after their
+  // swap is issued.
+  if (now < swap->earliest_display_time_allowed)
+    return false;
+
+  // If we've passed that marker, then wait for the work behind the fence to
+  // complete.
+  if (swap->gl_fence) {
+    gfx::ScopedSetGLToRealGLApi scoped_set_gl_api;
+    gfx::ScopedCGLSetCurrentContext scoped_set_current(swap->cgl_context);
+
+    CheckGLErrors("before waiting on fence");
+    if (!swap->gl_fence->HasCompleted()) {
+      TRACE_EVENT0("gpu", "ImageTransportSurfaceOverlayMac::ClientWait");
+      swap->gl_fence->ClientWait();
+    }
+    swap->gl_fence.reset();
+    CheckGLErrors("after waiting on fence");
+  }
+  return true;
+}
+
+void ImageTransportSurfaceOverlayMac::DisplayFirstPendingSwapImmediately() {
+  TRACE_EVENT0("gpu",
+      "ImageTransportSurfaceOverlayMac::DisplayFirstPendingSwapImmediately");
+  DCHECK(!pending_swaps_.empty());
+  linked_ptr<PendingSwap> swap = pending_swaps_.front();
+
+  // If there is a fence for this object, delete it.
+  if (swap->gl_fence) {
+    gfx::ScopedSetGLToRealGLApi scoped_set_gl_api;
+    gfx::ScopedCGLSetCurrentContext scoped_set_current(swap->cgl_context);
+
+    CheckGLErrors("before deleting active fence");
+    swap->gl_fence.reset();
+    CheckGLErrors("while deleting active fence");
+  }
+
+  // Update the CALayer hierarchy.
+  {
+    gfx::RectF pixel_damage_rect = gfx::RectF(swap->pixel_damage_rect);
+    ScopedCAActionDisabler disabler;
+    if (swap->ca_layer_tree) {
+      swap->ca_layer_tree->CommitScheduledCALayers(
+          ca_root_layer_.get(), std::move(current_ca_layer_tree_),
+          swap->scale_factor);
+      current_ca_layer_tree_.swap(swap->ca_layer_tree);
+      current_partial_damage_tree_.reset();
+    } else if (swap->partial_damage_tree) {
+      swap->partial_damage_tree->CommitCALayers(
+          ca_root_layer_.get(), std::move(current_partial_damage_tree_),
+          swap->scale_factor, swap->pixel_damage_rect);
+      current_partial_damage_tree_.swap(swap->partial_damage_tree);
+      current_ca_layer_tree_.reset();
+    } else {
+      TRACE_EVENT0("gpu", "Blank frame: No overlays or CALayers");
+      [ca_root_layer_ setSublayers:nil];
+      current_partial_damage_tree_.reset();
+      current_ca_layer_tree_.reset();
+    }
+    swap->ca_layer_tree.reset();
+    swap->partial_damage_tree.reset();
+  }
+
+  // Update the latency info to reflect the swap time.
+  base::TimeTicks swap_time = base::TimeTicks::Now();
+  for (auto latency_info : swap->latency_info) {
+    latency_info.AddLatencyNumberWithTimestamp(
+        ui::INPUT_EVENT_GPU_SWAP_BUFFER_COMPONENT, 0, 0, swap_time, 1);
+    latency_info.AddLatencyNumberWithTimestamp(
+        ui::INPUT_EVENT_LATENCY_TERMINATED_FRAME_SWAP_COMPONENT, 0, 0,
+        swap_time, 1);
+  }
+
+  // Send acknowledgement to the browser.
+  CAContextID ca_context_id = 0;
+  gfx::ScopedRefCountedIOSurfaceMachPort io_surface;
+  if (use_remote_layer_api_) {
+    ca_context_id = [ca_context_ contextId];
+  } else if (current_partial_damage_tree_) {
+    io_surface.reset(IOSurfaceCreateMachPort(
+        current_partial_damage_tree_->RootLayerIOSurface()));
+  }
+  gfx::Size size = swap->pixel_size;
+  float scale_factor = swap->scale_factor;
+  std::vector<ui::LatencyInfo> latency_info;
+  latency_info.swap(swap->latency_info);
+  SendAcceleratedSurfaceBuffersSwapped(handle_, ca_context_id, io_surface, size,
+                                       scale_factor, std::move(latency_info));
+
+  // Remove this from the queue, and reset any callback timers.
+  pending_swaps_.pop_front();
+}
+
+void ImageTransportSurfaceOverlayMac::DisplayAndClearAllPendingSwaps() {
+  TRACE_EVENT0("gpu",
+      "ImageTransportSurfaceOverlayMac::DisplayAndClearAllPendingSwaps");
+  while (!pending_swaps_.empty())
+    DisplayFirstPendingSwapImmediately();
+}
+
+void ImageTransportSurfaceOverlayMac::CheckPendingSwapsCallback() {
+  TRACE_EVENT0("gpu",
+      "ImageTransportSurfaceOverlayMac::CheckPendingSwapsCallback");
+
+  if (pending_swaps_.empty())
+    return;
+
+  const base::TimeTicks now = base::TimeTicks::Now();
+  if (IsFirstPendingSwapReadyToDisplay(now))
+    DisplayFirstPendingSwapImmediately();
+  PostCheckPendingSwapsCallbackIfNeeded(now);
+}
+
+void ImageTransportSurfaceOverlayMac::PostCheckPendingSwapsCallbackIfNeeded(
+    const base::TimeTicks& now) {
+  TRACE_EVENT0("gpu",
+      "ImageTransportSurfaceOverlayMac::PostCheckPendingSwapsCallbackIfNeeded");
+
+  if (pending_swaps_.empty()) {
+    display_pending_swap_timer_.Stop();
+  } else {
+    display_pending_swap_timer_.Start(
+        FROM_HERE,
+        pending_swaps_.front()->target_display_time - now,
+        base::Bind(&ImageTransportSurfaceOverlayMac::CheckPendingSwapsCallback,
+                       weak_factory_.GetWeakPtr()));
+  }
+}
+
+gfx::SwapResult ImageTransportSurfaceOverlayMac::SwapBuffers() {
+  return SwapBuffersInternal(
+      gfx::Rect(0, 0, pixel_size_.width(), pixel_size_.height()));
+}
+
+gfx::SwapResult ImageTransportSurfaceOverlayMac::PostSubBuffer(int x,
+                                                               int y,
+                                                               int width,
+                                                               int height) {
+  return SwapBuffersInternal(gfx::Rect(x, y, width, height));
+}
+
+bool ImageTransportSurfaceOverlayMac::SupportsPostSubBuffer() {
+  return true;
+}
+
+gfx::Size ImageTransportSurfaceOverlayMac::GetSize() {
+  return gfx::Size();
+}
+
+void* ImageTransportSurfaceOverlayMac::GetHandle() {
+  return nullptr;
+}
+
+bool ImageTransportSurfaceOverlayMac::OnMakeCurrent(gfx::GLContext* context) {
+  // Ensure that the context is on the appropriate GL renderer. The GL renderer
+  // will generally only change when the GPU changes.
+  if (gl_renderer_id_ && context)
+    context->share_group()->SetRendererID(gl_renderer_id_);
+  return true;
+}
+
+bool ImageTransportSurfaceOverlayMac::SetBackbufferAllocation(bool allocated) {
+  if (!allocated) {
+    DisplayAndClearAllPendingSwaps();
+    last_swap_time_ = base::TimeTicks();
+  }
+  return true;
+}
+
+bool ImageTransportSurfaceOverlayMac::ScheduleOverlayPlane(
+    int z_order,
+    gfx::OverlayTransform transform,
+    gl::GLImage* image,
+    const gfx::Rect& pixel_frame_rect,
+    const gfx::RectF& crop_rect) {
+  if (transform != gfx::OVERLAY_TRANSFORM_NONE) {
+    DLOG(ERROR) << "Invalid overlay plane transform.";
+    return false;
+  }
+  if (z_order) {
+    DLOG(ERROR) << "Invalid non-zero Z order.";
+    return false;
+  }
+  if (pending_partial_damage_tree_) {
+    DLOG(ERROR) << "Only one overlay per swap is allowed.";
+    return false;
+  }
+  pending_partial_damage_tree_.reset(new CALayerPartialDamageTree(
+      use_remote_layer_api_,
+      static_cast<gl::GLImageIOSurface*>(image)->io_surface(),
+      pixel_frame_rect));
+  return true;
+}
+
+bool ImageTransportSurfaceOverlayMac::ScheduleCALayer(
+    gl::GLImage* contents_image,
+    const gfx::RectF& contents_rect,
+    float opacity,
+    unsigned background_color,
+    unsigned edge_aa_mask,
+    const gfx::RectF& rect,
+    bool is_clipped,
+    const gfx::RectF& clip_rect,
+    const gfx::Transform& transform,
+    int sorting_context_id) {
+  base::ScopedCFTypeRef<IOSurfaceRef> io_surface;
+  if (contents_image) {
+    io_surface =
+        static_cast<gl::GLImageIOSurface*>(contents_image)->io_surface();
+  }
+  if (!pending_ca_layer_tree_)
+    pending_ca_layer_tree_.reset(new CALayerTree);
+  return pending_ca_layer_tree_->ScheduleCALayer(
+      is_clipped, gfx::ToEnclosingRect(clip_rect), sorting_context_id,
+      transform, io_surface, contents_rect, gfx::ToEnclosingRect(rect),
+      background_color, edge_aa_mask, opacity);
+}
+
+bool ImageTransportSurfaceOverlayMac::IsSurfaceless() const {
+  return true;
+}
+
+bool ImageTransportSurfaceOverlayMac::Resize(const gfx::Size& pixel_size,
+                                             float scale_factor,
+                                             bool has_alpha) {
+  // Flush through any pending frames.
+  DisplayAndClearAllPendingSwaps();
+  pixel_size_ = pixel_size;
+  scale_factor_ = scale_factor;
+  return true;
+}
+
+void ImageTransportSurfaceOverlayMac::OnGpuSwitched() {
+  // Create a new context, and use the GL renderer ID that the new context gets.
+  scoped_refptr<ui::IOSurfaceContext> context_on_new_gpu =
+      ui::IOSurfaceContext::Get(ui::IOSurfaceContext::kCALayerContext);
+  if (!context_on_new_gpu)
+    return;
+  GLint context_renderer_id = -1;
+  if (CGLGetParameter(context_on_new_gpu->cgl_context(),
+                      kCGLCPCurrentRendererID,
+                      &context_renderer_id) != kCGLNoError) {
+    LOG(ERROR) << "Failed to create test context after GPU switch";
+    return;
+  }
+  gl_renderer_id_ = context_renderer_id & kCGLRendererIDMatchingMask;
+
+  // Post a task holding a reference to the new GL context. The reason for
+  // this is to avoid creating-then-destroying the context for every image
+  // transport surface that is observing the GPU switch.
+  base::MessageLoop::current()->PostTask(
+      FROM_HERE, base::Bind(&IOSurfaceContextNoOp, context_on_new_gpu));
+}
+
+base::TimeTicks ImageTransportSurfaceOverlayMac::GetNextVSyncTimeAfter(
+    const base::TimeTicks& from, double interval_fraction) {
+  if (!vsync_parameters_valid_)
+    return from;
+
+  // Compute the previous vsync time.
+  base::TimeTicks previous_vsync =
+      vsync_interval_ * ((from - vsync_timebase_) / vsync_interval_) +
+      vsync_timebase_;
+
+  // Return |interval_fraction| through the next vsync.
+  return previous_vsync + (1 + interval_fraction) * vsync_interval_;
+}
+
+}  // namespace content