Initial commit of the blimp/ folder and target

blimp/client/android/compositor/blimp_compositor.cc

Index: blimp/client/android/compositor/blimp_compositor.cc
diff --git a/blimp/client/android/compositor/blimp_compositor.cc b/blimp/client/android/compositor/blimp_compositor.cc
new file mode 100644
index 0000000000000000000000000000000000000000..22f470f30c40952aaf111020b94907045fc515ac
--- /dev/null
+++ b/blimp/client/android/compositor/blimp_compositor.cc
@@ -0,0 +1,533 @@
+// 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 "blimp/client/android/compositor/blimp_compositor.h"
+
+#include <android/native_window_jni.h>
+
+#include "base/bind_helpers.h"
+#include "base/command_line.h"
+#include "base/lazy_instance.h"
+#include "base/single_thread_task_runner.h"
+#include "base/strings/string_number_conversions.h"
+#include "base/strings/string_split.h"
+#include "base/sys_info.h"
+#include "base/thread_task_runner_handle.h"
+#include "base/threading/simple_thread.h"
+#include "base/threading/thread.h"
+#include "base/threading/thread_local.h"
+#include "base/threading/thread_restrictions.h"
+#include "blimp/client/android/compositor/blimp_context_provider.h"
+#include "blimp/client/android/compositor/blimp_output_surface.h"
+#include "cc/base/switches.h"
+#include "cc/layers/layer.h"
+#include "cc/layers/solid_color_layer.h"
+#include "cc/output/output_surface.h"
+#include "cc/raster/task_graph_runner.h"
+#include "cc/trees/layer_tree_host.h"
+#include "content/public/common/content_switches.h"
+#include "ui/gl/gl_surface.h"
+
+namespace {
+
+class SingleThreadTaskGraphRunner
+    : public cc::TaskGraphRunner,
+      public base::DelegateSimpleThread::Delegate {
+ public:
+  SingleThreadTaskGraphRunner()
+      : worker_thread_(
+            this,
+            "CompositorTileWorker1",
+            base::SimpleThread::Options(base::ThreadPriority::BACKGROUND)) {
+    worker_thread_.Start();
+  }
+
+  ~SingleThreadTaskGraphRunner() override {
+    Shutdown();
+    worker_thread_.Join();
+  }
+
+ private:
+  // Overridden from base::DelegateSimpleThread::Delegate:
+  void Run() override { cc::TaskGraphRunner::Run(); }
+
+  base::DelegateSimpleThread worker_thread_;
+};
+
+base::LazyInstance<SingleThreadTaskGraphRunner> g_task_graph_runner =
+    LAZY_INSTANCE_INITIALIZER;
+
+bool GetSwitchValueAsInt(const base::CommandLine& command_line,
+                         const std::string& switch_string,
+                         int min_value,
+                         int max_value,
+                         int* result) {
+  std::string string_value = command_line.GetSwitchValueASCII(switch_string);
+  int int_value;
+  if (base::StringToInt(string_value, &int_value) && int_value >= min_value &&
+      int_value <= max_value) {
+    *result = int_value;
+    return true;
+  } else {
+    return false;
+  }
+}
+
+void StringToUintVector(const std::string& str, std::vector<unsigned>* vector) {
+  DCHECK(vector->empty());
+  std::vector<std::string> pieces =
+      base::SplitString(str, ",", base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL);
+  DCHECK_EQ(pieces.size(), static_cast<size_t>(gfx::BufferFormat::LAST) + 1);
+  for (size_t i = 0; i < pieces.size(); ++i) {
+    unsigned number = 0;
+    bool succeed = base::StringToUint(pieces[i], &number);
+    DCHECK(succeed);
+    vector->push_back(number);
+  }
+}
+
+bool GetSwitchValueAsUInt(const base::CommandLine& command_line,
+                          const std::string& switch_string,
+                          unsigned min_value,
+                          unsigned max_value,
+                          unsigned* result) {
+  std::string string_value = command_line.GetSwitchValueASCII(switch_string);
+  unsigned uint_value;
+  if (base::StringToUint(string_value, &uint_value) &&
+      uint_value >= min_value && uint_value <= max_value) {
+    *result = uint_value;
+    return true;
+  } else {
+    return false;
+  }
+}
+
+gfx::Size CalculateDefaultTileSize(const gfx::Size& physical_size,
+                                   const gfx::Size& display_size) {
+  int default_tile_size = 256;
+  bool real_size_supported = true;
+  int display_width = physical_size.width();
+  int display_height = physical_size.height();
+  if (display_width == 0 || display_height == 0) {
+    real_size_supported = false;
+    display_width = display_size.width();
+    display_height = display_size.height();
+  }
+
+  int portrait_width = std::min(display_width, display_height);
+  int landscape_width = std::max(display_width, display_height);
+
+  if (real_size_supported) {
+    // Maximum HD dimensions should be 768x1280
+    // Maximum FHD dimensions should be 1200x1920
+    if (portrait_width > 768 || landscape_width > 1280)
+      default_tile_size = 384;
+    if (portrait_width > 1200 || landscape_width > 1920)
+      default_tile_size = 512;
+
+    // Adjust for some resolutions that barely straddle an extra
+    // tile when in portrait mode. This helps worst case scroll/raster
+    // by not needing a full extra tile for each row.
+    if (default_tile_size == 256 && portrait_width == 768)
+      default_tile_size += 32;
+    if (default_tile_size == 384 && portrait_width == 1200)
+      default_tile_size += 32;
+  } else {
+    // We don't know the exact resolution due to screen controls etc.

[nyquist, 2015/08/19 07:48:06]

Optional nit: Add comma at end of line, and lowercase 'so'?

[David Trainor- moved to gerrit, 2015/08/21 00:49:46]

Done.

+    // So this just estimates the values above using tile counts.
+    int numTiles = (display_width * display_height) / (256 * 256);
+    if (numTiles > 16)
+      default_tile_size = 384;
+    if (numTiles >= 40)
+      default_tile_size = 512;
+  }
+
+  return gfx::Size(default_tile_size, default_tile_size);
+}
+
+void PopulateLayerTreeSettings(cc::LayerTreeSettings& settings,
+                               const gfx::Size& physical_size,
+                               const gfx::Size& display_size) {
+  base::CommandLine* cmd = base::CommandLine::ForCurrentProcess();
+
+  // For web contents, layer transforms should scale up the contents of layers
+  // to keep content always crisp when possible.
+  settings.layer_transforms_should_scale_layer_contents = true;
+
+  if (cmd->HasSwitch(switches::kDisableGpuVsync)) {
+    std::string display_vsync_string =
+        cmd->GetSwitchValueASCII(switches::kDisableGpuVsync);
+    if (display_vsync_string == "gpu") {
+      settings.renderer_settings.disable_display_vsync = true;
+    } else if (display_vsync_string == "beginframe") {
+      settings.wait_for_beginframe_interval = false;
+    } else {
+      settings.renderer_settings.disable_display_vsync = true;
+      settings.wait_for_beginframe_interval = false;
+    }
+  }
+  settings.main_frame_before_activation_enabled =
+      cmd->HasSwitch(cc::switches::kEnableMainFrameBeforeActivation) &&
+      !cmd->HasSwitch(cc::switches::kDisableMainFrameBeforeActivation);
+  settings.accelerated_animation_enabled =
+      !cmd->HasSwitch(cc::switches::kDisableThreadedAnimation);
+  settings.use_display_lists = cmd->HasSwitch(switches::kEnableSlimmingPaint);
+  // if (cmd->HasSwitch(switches::kEnableCompositorAnimationTimelines)) {
+  //  settings.use_compositor_animation_timelines = true;
+  //  blink::WebRuntimeFeatures::enableCompositorAnimationTimelines(true);
+  //}
+
+  settings.default_tile_size =
+      CalculateDefaultTileSize(physical_size, display_size);
+  if (cmd->HasSwitch(switches::kDefaultTileWidth)) {
+    int tile_width = 0;
+    GetSwitchValueAsInt(*cmd, switches::kDefaultTileWidth, 1,
+                        std::numeric_limits<int>::max(), &tile_width);
+    settings.default_tile_size.set_width(tile_width);
+  }
+  if (cmd->HasSwitch(switches::kDefaultTileHeight)) {
+    int tile_height = 0;
+    GetSwitchValueAsInt(*cmd, switches::kDefaultTileHeight, 1,
+                        std::numeric_limits<int>::max(), &tile_height);
+    settings.default_tile_size.set_height(tile_height);
+  }
+
+  int max_untiled_layer_width = settings.max_untiled_layer_size.width();
+  if (cmd->HasSwitch(switches::kMaxUntiledLayerWidth)) {
+    GetSwitchValueAsInt(*cmd, switches::kMaxUntiledLayerWidth, 1,
+                        std::numeric_limits<int>::max(),
+                        &max_untiled_layer_width);
+  }
+  int max_untiled_layer_height = settings.max_untiled_layer_size.height();
+  if (cmd->HasSwitch(switches::kMaxUntiledLayerHeight)) {
+    GetSwitchValueAsInt(*cmd, switches::kMaxUntiledLayerHeight, 1,
+                        std::numeric_limits<int>::max(),
+                        &max_untiled_layer_height);
+  }
+
+  settings.max_untiled_layer_size =
+      gfx::Size(max_untiled_layer_width, max_untiled_layer_height);
+
+  settings.gpu_rasterization_msaa_sample_count = 0;
+  if (cmd->HasSwitch(switches::kGpuRasterizationMSAASampleCount)) {
+    GetSwitchValueAsInt(*cmd, switches::kGpuRasterizationMSAASampleCount, 0,
+                        std::numeric_limits<int>::max(),
+                        &settings.gpu_rasterization_msaa_sample_count);
+  }
+
+  settings.gpu_rasterization_forced =
+      cmd->HasSwitch(switches::kForceGpuRasterization);
+  settings.gpu_rasterization_enabled =
+      cmd->HasSwitch(switches::kEnableGpuRasterization);
+
+  settings.can_use_lcd_text = false;
+  settings.use_distance_field_text =
+      cmd->HasSwitch(switches::kEnableDistanceFieldText);
+
+  settings.use_zero_copy = cmd->HasSwitch(switches::kEnableZeroCopy);
+  settings.use_one_copy = !cmd->HasSwitch(switches::kDisableOneCopy);
+  settings.enable_elastic_overscroll = false;
+
+  if (cmd->HasSwitch(switches::kContentImageTextureTarget)) {
+    settings.use_image_texture_targets.clear();
+    StringToUintVector(
+        cmd->GetSwitchValueASCII(switches::kContentImageTextureTarget),
+        &settings.use_image_texture_targets);
+  }
+
+  settings.gather_pixel_refs = false;
+  if (cmd->HasSwitch(switches::kNumRasterThreads)) {
+    int num_raster_threads = 0;
+    GetSwitchValueAsInt(*cmd, switches::kNumRasterThreads, 0,
+                        std::numeric_limits<int>::max(), &num_raster_threads);
+    settings.gather_pixel_refs = num_raster_threads > 1;
+  }
+
+  if (cmd->HasSwitch(cc::switches::kTopControlsShowThreshold)) {
+    std::string top_threshold_str =
+        cmd->GetSwitchValueASCII(cc::switches::kTopControlsShowThreshold);
+    double show_threshold;
+    if (base::StringToDouble(top_threshold_str, &show_threshold) &&
+        show_threshold >= 0.f && show_threshold <= 1.f)
+      settings.top_controls_show_threshold = show_threshold;
+  }
+
+  if (cmd->HasSwitch(cc::switches::kTopControlsHideThreshold)) {
+    std::string top_threshold_str =
+        cmd->GetSwitchValueASCII(cc::switches::kTopControlsHideThreshold);
+    double hide_threshold;
+    if (base::StringToDouble(top_threshold_str, &hide_threshold) &&
+        hide_threshold >= 0.f && hide_threshold <= 1.f)
+      settings.top_controls_hide_threshold = hide_threshold;
+  }
+
+  settings.verify_property_trees =
+      cmd->HasSwitch(cc::switches::kEnablePropertyTreeVerification);
+  settings.renderer_settings.allow_antialiasing &=
+      !cmd->HasSwitch(cc::switches::kDisableCompositedAntialiasing);
+  // The means the renderer compositor has 2 possible modes:
+  // - Threaded compositing with a scheduler.
+  // - Single threaded compositing without a scheduler (for layout tests only).
+  // Using the scheduler in layout tests introduces additional composite steps
+  // that create flakiness.
+  settings.single_thread_proxy_scheduler = false;
+
+  // These flags should be mirrored by UI versions in ui/compositor/.
+  settings.initial_debug_state.show_debug_borders =
+      cmd->HasSwitch(cc::switches::kShowCompositedLayerBorders);
+  settings.initial_debug_state.show_fps_counter =
+      cmd->HasSwitch(cc::switches::kShowFPSCounter);
+  settings.initial_debug_state.show_layer_animation_bounds_rects =
+      cmd->HasSwitch(cc::switches::kShowLayerAnimationBounds);
+  settings.initial_debug_state.show_paint_rects =
+      cmd->HasSwitch(switches::kShowPaintRects);
+  settings.initial_debug_state.show_property_changed_rects =
+      cmd->HasSwitch(cc::switches::kShowPropertyChangedRects);
+  settings.initial_debug_state.show_surface_damage_rects =
+      cmd->HasSwitch(cc::switches::kShowSurfaceDamageRects);
+  settings.initial_debug_state.show_screen_space_rects =
+      cmd->HasSwitch(cc::switches::kShowScreenSpaceRects);
+  settings.initial_debug_state.show_replica_screen_space_rects =
+      cmd->HasSwitch(cc::switches::kShowReplicaScreenSpaceRects);
+
+  settings.initial_debug_state.SetRecordRenderingStats(
+      cmd->HasSwitch(cc::switches::kEnableGpuBenchmarking));
+
+  if (cmd->HasSwitch(cc::switches::kSlowDownRasterScaleFactor)) {
+    const int kMinSlowDownScaleFactor = 0;
+    const int kMaxSlowDownScaleFactor = INT_MAX;
+    GetSwitchValueAsInt(
+        *cmd, cc::switches::kSlowDownRasterScaleFactor, kMinSlowDownScaleFactor,
+        kMaxSlowDownScaleFactor,
+        &settings.initial_debug_state.slow_down_raster_scale_factor);
+  }
+
+  settings.invert_viewport_scroll_order =
+      cmd->HasSwitch(switches::kInvertViewportScrollOrder);
+
+  if (cmd->HasSwitch(cc::switches::kMaxUnusedResourceMemoryUsagePercentage)) {
+    int max_unused_resource_memory_percentage;
+    if (GetSwitchValueAsInt(
+            *cmd, cc::switches::kMaxUnusedResourceMemoryUsagePercentage, 0, 100,
+            &max_unused_resource_memory_percentage)) {
+      settings.max_unused_resource_memory_percentage =
+          max_unused_resource_memory_percentage;
+    }
+  }
+
+  settings.strict_layer_property_change_checking =
+      cmd->HasSwitch(cc::switches::kStrictLayerPropertyChangeChecking);
+
+#if defined(OS_ANDROID)
+  bool has_synchronous_compositor_factory = false;
+  // SynchronousCompositorFactory* synchronous_compositor_factory =
+  //    SynchronousCompositorFactory::GetInstance();
+
+  // We can't use GPU rasterization on low-end devices, because the Ganesh
+  // cache would consume too much memory.
+  if (base::SysInfo::IsLowEndDevice())
+    settings.gpu_rasterization_enabled = false;
+  settings.using_synchronous_renderer_compositor =
+      has_synchronous_compositor_factory;
+  settings.record_full_layer = false;  // widget_->DoesRecordFullLayer();
+  settings.max_partial_texture_updates = 0;
+  if (has_synchronous_compositor_factory) {

[nyquist, 2015/08/19 07:48:06]

Would we be certain to get one of these blocks always going forward?

+    // Android WebView uses system scrollbars, so make ours invisible.
+    settings.scrollbar_animator = cc::LayerTreeSettings::NO_ANIMATOR;
+    settings.solid_color_scrollbar_color = SK_ColorTRANSPARENT;
+  } else {
+    settings.scrollbar_animator = cc::LayerTreeSettings::LINEAR_FADE;
+    settings.scrollbar_fade_delay_ms = 300;
+    settings.scrollbar_fade_resize_delay_ms = 2000;
+    settings.scrollbar_fade_duration_ms = 300;
+    settings.solid_color_scrollbar_color = SkColorSetARGB(128, 128, 128, 128);
+  }
+  settings.renderer_settings.highp_threshold_min = 2048;
+  // Android WebView handles root layer flings itself.
+  settings.ignore_root_layer_flings = has_synchronous_compositor_factory;
+  // Memory policy on Android WebView does not depend on whether device is
+  // low end, so always use default policy.
+  bool use_low_memory_policy =
+      base::SysInfo::IsLowEndDevice() && !has_synchronous_compositor_factory;
+  // RGBA_4444 textures are only enabled for low end devices
+  // and are disabled for Android WebView as it doesn't support the format.
+  settings.renderer_settings.use_rgba_4444_textures = use_low_memory_policy;
+  if (use_low_memory_policy) {
+    // On low-end we want to be very carefull about killing other
+    // apps. So initially we use 50% more memory to avoid flickering
+    // or raster-on-demand.
+    settings.max_memory_for_prepaint_percentage = 67;
+  } else {
+    // On other devices we have increased memory excessively to avoid
+    // raster-on-demand already, so now we reserve 50% _only_ to avoid
+    // raster-on-demand, and use 50% of the memory otherwise.
+    settings.max_memory_for_prepaint_percentage = 50;
+  }
+  // Webview does not own the surface so should not clear it.
+  settings.renderer_settings.should_clear_root_render_pass =
+      !has_synchronous_compositor_factory;
+
+  // TODO(danakj): Only do this on low end devices.
+  settings.create_low_res_tiling = true;
+
+// settings.use_external_begin_frame_source = true;
+
+#elif !defined(OS_MACOSX)
+  if (ui::IsOverlayScrollbarEnabled()) {
+    settings.scrollbar_animator = cc::LayerTreeSettings::THINNING;
+    settings.solid_color_scrollbar_color = SkColorSetARGB(128, 128, 128, 128);
+  } else {
+    settings.scrollbar_animator = cc::LayerTreeSettings::LINEAR_FADE;
+    settings.solid_color_scrollbar_color = SkColorSetARGB(128, 128, 128, 128);
+  }
+  settings.scrollbar_fade_delay_ms = 500;
+  settings.scrollbar_fade_resize_delay_ms = 500;
+  settings.scrollbar_fade_duration_ms = 300;
+
+  // When pinching in, only show the pinch-viewport overlay scrollbars if the
+  // page scale is at least some threshold away from the minimum. i.e. don't
+  // show the pinch scrollbars when at minimum scale.
+  settings.scrollbar_show_scale_threshold = 1.05f;
+#endif
+
+  if (cmd->HasSwitch(switches::kEnableLowResTiling))
+    settings.create_low_res_tiling = true;
+  if (cmd->HasSwitch(switches::kDisableLowResTiling))
+    settings.create_low_res_tiling = false;
+  if (cmd->HasSwitch(cc::switches::kEnableBeginFrameScheduling))
+    settings.use_external_begin_frame_source = true;
+}
+
+}  // namespace
+
+namespace blimp {
+
+scoped_ptr<BlimpCompositor> BlimpCompositor::Create(
+    const gfx::Size& physical_size,
+    const gfx::Size& display_size,
+    float device_scale_factor) {
+  return make_scoped_ptr(
+      new BlimpCompositor(physical_size, display_size, device_scale_factor));
+}
+
+BlimpCompositor::BlimpCompositor(const gfx::Size& physical_size,
+                                 const gfx::Size& display_size,
+                                 float device_scale_factor)
+    : device_scale_factor_(device_scale_factor),
+      window_(nullptr),
+      weak_factory_(this) {
+  PopulateLayerTreeSettings(settings_, physical_size, display_size);
+}
+
+BlimpCompositor::~BlimpCompositor() {}
+
+void BlimpCompositor::SetSurface(JNIEnv* env, jobject jsurface) {
+  if (window_) {
+    ANativeWindow_release(window_);
+    window_ = nullptr;
+    SetVisible(false);
+  }
+
+  if (!jsurface)
+    return;
+
+  base::android::ScopedJavaLocalFrame scoped_local_reference_frame(env);
+  window_ = ANativeWindow_fromSurface(env, jsurface);
+  // TODO(dtrainor): Investigate ref counts!
+  // ANativeWindow_acquire(window_);
+  // ANativeWindow_release(window_);
+
+  SetVisible(true);
+}
+
+void BlimpCompositor::SetVisible(bool visible) {
+  if (visible && !host_) {
+    // Create the LayerTreeHost
+    cc::LayerTreeHost::InitParams params;
+    params.client = this;
+    params.shared_bitmap_manager = nullptr;
+    params.gpu_memory_buffer_manager = nullptr;
+    params.task_graph_runner = g_task_graph_runner.Pointer();
+    params.main_task_runner = base::ThreadTaskRunnerHandle::Get();
+    params.settings = &settings_;
+    host_ =
+        cc::LayerTreeHost::CreateThreaded(GetCompositorTaskRunner(), &params);
+
+    host_->SetVisible(true);
+    host_->SetLayerTreeHostClientReady();
+    host_->SetViewportSize(viewport_size_);
+    host_->SetDeviceScaleFactor(device_scale_factor_);
+
+    // Dummy Layers
+    scoped_refptr<cc::Layer> root(
+        cc::SolidColorLayer::Create(cc::LayerSettings()));
+    root->SetBounds(gfx::Size(300, 300));
+    root->SetBackgroundColor(SK_ColorRED);
+    root->SetIsDrawable(true);
+    host_->SetRootLayer(root);
+
+  } else if (!visible && host_) {
+    // Destroy the LayerTreeHost
+    host_.reset();
+  }
+}
+
+void BlimpCompositor::SetSize(const gfx::Size& size) {
+  viewport_size_ = size;
+  if (host_)
+    host_->SetViewportSize(viewport_size_);
+}
+
+void BlimpCompositor::Layout() {}
+
+void BlimpCompositor::RequestNewOutputSurface() {
+  scoped_refptr<BlimpContextProvider> context_provider =
+      BlimpContextProvider::Create(window_);
+
+  scoped_ptr<cc::OutputSurface> output_surface(
+      new BlimpOutputSurface(context_provider));
+
+  host_->SetOutputSurface(output_surface.Pass());
+}
+
+void BlimpCompositor::DidInitializeOutputSurface() {}
+
+void BlimpCompositor::DidFailToInitializeOutputSurface() {}
+
+void BlimpCompositor::DidCommit() {}
+
+void BlimpCompositor::DidCompleteSwapBuffers() {}
+
+void BlimpCompositor::ScheduleComposite() {}
+
+void BlimpCompositor::ScheduleAnimation() {}
+
+void BlimpCompositor::DidPostSwapBuffers() {}
+
+void BlimpCompositor::DidAbortSwapBuffers() {}
+
+scoped_refptr<base::SingleThreadTaskRunner>
+BlimpCompositor::GetCompositorTaskRunner() {
+  if (!compositor_thread_) {
+    base::Thread::Options thread_options;
+#if defined(OS_ANDROID)
+    thread_options.priority = base::ThreadPriority::DISPLAY;
+#endif
+    compositor_thread_.reset(new base::Thread("Compositor"));
+    compositor_thread_->StartWithOptions(thread_options);
+
+    scoped_refptr<base::SingleThreadTaskRunner> task_runner =
+        compositor_thread_->task_runner();
+    task_runner->PostTask(
+        FROM_HERE,
+        base::Bind(base::IgnoreResult(&base::ThreadRestrictions::SetIOAllowed),
+                   false));
+
+    return task_runner;
+  } else {
+    return compositor_thread_->task_runner();
+  }
+}
+
+}  // namespace blimp