cc/layers/delegated_renderer_layer_impl.cc

   1 // Copyright 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "cc/layers/delegated_renderer_layer_impl.h"
   6
   7 #include <algorithm>
   8 #include <utility>
   9
  10 #include "base/bind.h"
  11 #include "base/containers/hash_tables.h"
  12 #include "cc/base/math_util.h"
  13 #include "cc/layers/append_quads_data.h"
  14 #include "cc/layers/render_pass_sink.h"
  15 #include "cc/output/delegated_frame_data.h"
  16 #include "cc/quads/render_pass_draw_quad.h"
  17 #include "cc/quads/solid_color_draw_quad.h"
  18 #include "cc/trees/layer_tree_impl.h"
  19 #include "cc/trees/occlusion.h"
  20 #include "ui/gfx/geometry/rect_conversions.h"
  21
  22 namespace cc {
  23
  24 DelegatedRendererLayerImpl::DelegatedRendererLayerImpl(LayerTreeImpl* tree_impl,
  25                                                        int id)
  26     : LayerImpl(tree_impl, id),
  27       have_render_passes_to_push_(false),
  28       inverse_device_scale_factor_(1.0f),
  29       child_id_(0),
  30       own_child_id_(false) {
  31 }
  32
  33 DelegatedRendererLayerImpl::~DelegatedRendererLayerImpl() {
  34   ClearRenderPasses();
  35   ClearChildId();
  36 }
  37
  38 bool DelegatedRendererLayerImpl::HasDelegatedContent() const { return true; }
  39
  40 bool DelegatedRendererLayerImpl::HasContributingDelegatedRenderPasses() const {
  41   // The root RenderPass for the layer is merged with its target
  42   // RenderPass in each frame. So we only have extra RenderPasses
  43   // to merge when we have a non-root RenderPass present.
  44   return render_passes_in_draw_order_.size() > 1;
  45 }
  46
  47 static ResourceProvider::ResourceId ResourceRemapHelper(
  48     bool* invalid_frame,
  49     const ResourceProvider::ResourceIdMap& child_to_parent_map,
  50     ResourceProvider::ResourceIdArray* resources_in_frame,
  51     ResourceProvider::ResourceId id) {
  52
  53   ResourceProvider::ResourceIdMap::const_iterator it =
  54       child_to_parent_map.find(id);
  55   if (it == child_to_parent_map.end()) {
  56     *invalid_frame = true;
  57     return 0;
  58   }
  59
  60   DCHECK_EQ(it->first, id);
  61   ResourceProvider::ResourceId remapped_id = it->second;
  62   resources_in_frame->push_back(id);
  63   return remapped_id;
  64 }
  65
  66 void DelegatedRendererLayerImpl::PushPropertiesTo(LayerImpl* layer) {
  67   LayerImpl::PushPropertiesTo(layer);
  68
  69   DelegatedRendererLayerImpl* delegated_layer =
  70       static_cast<DelegatedRendererLayerImpl*>(layer);
  71
  72   // If we have a new child_id to give to the active layer, it should
  73   // have already deleted its old child_id.
  74   DCHECK(delegated_layer->child_id_ == 0 ||
  75          delegated_layer->child_id_ == child_id_);
  76   delegated_layer->inverse_device_scale_factor_ = inverse_device_scale_factor_;
  77   delegated_layer->child_id_ = child_id_;
  78   delegated_layer->own_child_id_ = true;
  79   own_child_id_ = false;
  80
  81   if (have_render_passes_to_push_) {
  82     // This passes ownership of the render passes to the active tree.
  83     delegated_layer->SetRenderPasses(&render_passes_in_draw_order_);
  84     DCHECK(render_passes_in_draw_order_.empty());
  85     have_render_passes_to_push_ = false;
  86   }
  87
  88   // This is just a copy for testing, since resources are added to the
  89   // ResourceProvider in the pending tree.
  90   delegated_layer->resources_ = resources_;
  91 }
  92
  93 void DelegatedRendererLayerImpl::CreateChildIdIfNeeded(
  94     const ReturnCallback& return_callback) {
  95   if (child_id_)
  96     return;
  97
  98   ResourceProvider* resource_provider = layer_tree_impl()->resource_provider();
  99   child_id_ = resource_provider->CreateChild(return_callback);
 100   own_child_id_ = true;
 101 }
 102
 103 void DelegatedRendererLayerImpl::SetFrameData(
 104     const DelegatedFrameData* frame_data,
 105     const gfx::RectF& damage_in_frame) {
 106   DCHECK(child_id_) << "CreateChildIdIfNeeded must be called first.";
 107   DCHECK(frame_data);
 108   DCHECK(!frame_data->render_pass_list.empty());
 109   // A frame with an empty root render pass is invalid.
 110   DCHECK(!frame_data->render_pass_list.back()->output_rect.IsEmpty());
 111
 112   ResourceProvider* resource_provider = layer_tree_impl()->resource_provider();
 113     const ResourceProvider::ResourceIdMap& resource_map =
 114         resource_provider->GetChildToParentMap(child_id_);
 115
 116   resource_provider->ReceiveFromChild(child_id_, frame_data->resource_list);
 117
 118   RenderPassList render_pass_list;
 119   RenderPass::CopyAll(frame_data->render_pass_list, &render_pass_list);
 120
 121   bool invalid_frame = false;
 122   ResourceProvider::ResourceIdArray resources_in_frame;
 123   DrawQuad::ResourceIteratorCallback remap_resources_to_parent_callback =
 124       base::Bind(&ResourceRemapHelper,
 125                  &invalid_frame,
 126                  resource_map,
 127                  &resources_in_frame);
 128   for (const auto& pass : render_pass_list) {
 129     for (const auto& quad : pass->quad_list)
 130       quad->IterateResources(remap_resources_to_parent_callback);
 131   }
 132
 133   if (invalid_frame) {
 134     // Declare we are still using the last frame's resources.
 135     resource_provider->DeclareUsedResourcesFromChild(child_id_, resources_);
 136     return;
 137   }
 138
 139   // Declare we are using the new frame's resources.
 140   resources_.swap(resources_in_frame);
 141   resource_provider->DeclareUsedResourcesFromChild(child_id_, resources_);
 142
 143   inverse_device_scale_factor_ = 1.0f / frame_data->device_scale_factor;
 144   // Display size is already set so we can compute what the damage rect
 145   // will be in layer space. The damage may exceed the visible portion of
 146   // the frame, so intersect the damage to the layer's bounds.
 147   RenderPass* new_root_pass = render_pass_list.back();
 148   gfx::Size frame_size = new_root_pass->output_rect.size();
 149   gfx::RectF damage_in_layer = damage_in_frame;
 150   damage_in_layer.Scale(inverse_device_scale_factor_);
 151   SetUpdateRect(gfx::IntersectRects(
 152       gfx::UnionRects(update_rect(), gfx::ToEnclosingRect(damage_in_layer)),
 153       gfx::Rect(bounds())));
 154
 155   SetRenderPasses(&render_pass_list);
 156   have_render_passes_to_push_ = true;
 157 }
 158
 159 void DelegatedRendererLayerImpl::SetRenderPasses(
 160     RenderPassList* render_passes_in_draw_order) {
 161   ClearRenderPasses();
 162
 163   for (size_t i = 0; i < render_passes_in_draw_order->size(); ++i) {
 164     RenderPassList::iterator to_take =
 165         render_passes_in_draw_order->begin() + i;
 166     render_passes_index_by_id_.insert(
 167         std::pair<RenderPassId, int>((*to_take)->id, i));
 168     scoped_ptr<RenderPass> taken_render_pass =
 169         render_passes_in_draw_order->take(to_take);
 170     render_passes_in_draw_order_.push_back(taken_render_pass.Pass());
 171   }
 172
 173   // Give back an empty array instead of nulls.
 174   render_passes_in_draw_order->clear();
 175 }
 176
 177 void DelegatedRendererLayerImpl::ClearRenderPasses() {
 178   render_passes_index_by_id_.clear();
 179   render_passes_in_draw_order_.clear();
 180 }
 181
 182 scoped_ptr<LayerImpl> DelegatedRendererLayerImpl::CreateLayerImpl(
 183     LayerTreeImpl* tree_impl) {
 184   return DelegatedRendererLayerImpl::Create(tree_impl, id());
 185 }
 186
 187 void DelegatedRendererLayerImpl::ReleaseResources() {
 188   ClearRenderPasses();
 189   ClearChildId();
 190 }
 191
 192 static inline int IndexToId(int index) { return index + 1; }
 193 static inline int IdToIndex(int id) { return id - 1; }
 194
 195 RenderPassId DelegatedRendererLayerImpl::FirstContributingRenderPassId() const {
 196   return RenderPassId(id(), IndexToId(0));
 197 }
 198
 199 RenderPassId DelegatedRendererLayerImpl::NextContributingRenderPassId(
 200     RenderPassId previous) const {
 201   return RenderPassId(previous.layer_id, previous.index + 1);
 202 }
 203
 204 bool DelegatedRendererLayerImpl::ConvertDelegatedRenderPassId(
 205     RenderPassId delegated_render_pass_id,
 206     RenderPassId* output_render_pass_id) const {
 207   base::hash_map<RenderPassId, int>::const_iterator found =
 208       render_passes_index_by_id_.find(delegated_render_pass_id);
 209   if (found == render_passes_index_by_id_.end()) {
 210     // Be robust against a RenderPass id that isn't part of the frame.
 211     return false;
 212   }
 213   unsigned delegated_render_pass_index = found->second;
 214   *output_render_pass_id =
 215       RenderPassId(id(), IndexToId(delegated_render_pass_index));
 216   return true;
 217 }
 218
 219 void DelegatedRendererLayerImpl::AppendContributingRenderPasses(
 220     RenderPassSink* render_pass_sink) {
 221   DCHECK(HasContributingDelegatedRenderPasses());
 222
 223   const RenderPass* root_delegated_render_pass =
 224       render_passes_in_draw_order_.back();
 225   gfx::Size frame_size = root_delegated_render_pass->output_rect.size();
 226   gfx::Transform delegated_frame_to_root_transform = screen_space_transform();
 227   delegated_frame_to_root_transform.Scale(inverse_device_scale_factor_,
 228                                           inverse_device_scale_factor_);
 229
 230   for (size_t i = 0; i < render_passes_in_draw_order_.size() - 1; ++i) {
 231     RenderPassId output_render_pass_id(-1, -1);
 232     bool present =
 233         ConvertDelegatedRenderPassId(render_passes_in_draw_order_[i]->id,
 234                                      &output_render_pass_id);
 235
 236     // Don't clash with the RenderPass we generate if we own a RenderSurface.
 237     DCHECK(present) << render_passes_in_draw_order_[i]->id.layer_id << ", "
 238                     << render_passes_in_draw_order_[i]->id.index;
 239     DCHECK_GT(output_render_pass_id.index, 0);
 240
 241     scoped_ptr<RenderPass> copy_pass =
 242         render_passes_in_draw_order_[i]->Copy(output_render_pass_id);
 243     copy_pass->transform_to_root_target.ConcatTransform(
 244         delegated_frame_to_root_transform);
 245     render_pass_sink->AppendRenderPass(copy_pass.Pass());
 246   }
 247 }
 248
 249 bool DelegatedRendererLayerImpl::WillDraw(DrawMode draw_mode,
 250                                           ResourceProvider* resource_provider) {
 251   if (draw_mode == DRAW_MODE_RESOURCELESS_SOFTWARE)
 252     return false;
 253   return LayerImpl::WillDraw(draw_mode, resource_provider);
 254 }
 255
 256 void DelegatedRendererLayerImpl::AppendQuads(
 257     RenderPass* render_pass,
 258     const Occlusion& occlusion_in_content_space,
 259     AppendQuadsData* append_quads_data) {
 260   AppendRainbowDebugBorder(render_pass);
 261
 262   // This list will be empty after a lost context until a new frame arrives.
 263   if (render_passes_in_draw_order_.empty())
 264     return;
 265
 266   RenderPassId target_render_pass_id = render_pass->id;
 267
 268   const RenderPass* root_delegated_render_pass =
 269       render_passes_in_draw_order_.back();
 270
 271   DCHECK(root_delegated_render_pass->output_rect.origin().IsOrigin());
 272   gfx::Size frame_size = root_delegated_render_pass->output_rect.size();
 273
 274   // If the index of the RenderPassId is 0, then it is a RenderPass generated
 275   // for a layer in this compositor, not the delegating renderer. Then we want
 276   // to merge our root RenderPass with the target RenderPass. Otherwise, it is
 277   // some RenderPass which we added from the delegating renderer.
 278   bool should_merge_root_render_pass_with_target = !target_render_pass_id.index;
 279   if (should_merge_root_render_pass_with_target) {
 280     // Verify that the RenderPass we are appending to is created by our
 281     // render_target.
 282     DCHECK(target_render_pass_id.layer_id == render_target()->id());
 283
 284     AppendRenderPassQuads(render_pass,
 285                           occlusion_in_content_space,
 286                           root_delegated_render_pass,
 287                           frame_size);
 288   } else {
 289     // Verify that the RenderPass we are appending to was created by us.
 290     DCHECK(target_render_pass_id.layer_id == id());
 291
 292     int render_pass_index = IdToIndex(target_render_pass_id.index);
 293     const RenderPass* delegated_render_pass =
 294         render_passes_in_draw_order_[render_pass_index];
 295     AppendRenderPassQuads(render_pass,
 296                           occlusion_in_content_space,
 297                           delegated_render_pass,
 298                           frame_size);
 299   }
 300 }
 301
 302 void DelegatedRendererLayerImpl::AppendRainbowDebugBorder(
 303     RenderPass* render_pass) {
 304   if (!ShowDebugBorders())
 305     return;
 306
 307   SharedQuadState* shared_quad_state =
 308       render_pass->CreateAndAppendSharedQuadState();
 309   PopulateSharedQuadState(shared_quad_state);
 310
 311   SkColor color;
 312   float border_width;
 313   GetDebugBorderProperties(&color, &border_width);
 314
 315   SkColor colors[] = {
 316     0x80ff0000,  // Red.
 317     0x80ffa500,  // Orange.
 318     0x80ffff00,  // Yellow.
 319     0x80008000,  // Green.
 320     0x800000ff,  // Blue.
 321     0x80ee82ee,  // Violet.
 322   };
 323   const int kNumColors = arraysize(colors);
 324
 325   const int kStripeWidth = 300;
 326   const int kStripeHeight = 300;
 327
 328   for (size_t i = 0; ; ++i) {
 329     // For horizontal lines.
 330     int x =  kStripeWidth * i;
 331     int width = std::min(kStripeWidth, content_bounds().width() - x - 1);
 332
 333     // For vertical lines.
 334     int y = kStripeHeight * i;
 335     int height = std::min(kStripeHeight, content_bounds().height() - y - 1);
 336
 337     gfx::Rect top(x, 0, width, border_width);
 338     gfx::Rect bottom(x,
 339                      content_bounds().height() - border_width,
 340                      width,
 341                      border_width);
 342     gfx::Rect left(0, y, border_width, height);
 343     gfx::Rect right(content_bounds().width() - border_width,
 344                     y,
 345                     border_width,
 346                     height);
 347
 348     if (top.IsEmpty() && left.IsEmpty())
 349       break;
 350
 351     if (!top.IsEmpty()) {
 352       SolidColorDrawQuad* top_quad =
 353           render_pass->CreateAndAppendDrawQuad<SolidColorDrawQuad>();
 354       top_quad->SetNew(
 355           shared_quad_state, top, top, colors[i % kNumColors], false);
 356
 357       SolidColorDrawQuad* bottom_quad =
 358           render_pass->CreateAndAppendDrawQuad<SolidColorDrawQuad>();
 359       bottom_quad->SetNew(shared_quad_state,
 360                           bottom,
 361                           bottom,
 362                           colors[kNumColors - 1 - (i % kNumColors)],
 363                           false);
 364     }
 365     if (!left.IsEmpty()) {
 366       SolidColorDrawQuad* left_quad =
 367           render_pass->CreateAndAppendDrawQuad<SolidColorDrawQuad>();
 368       left_quad->SetNew(shared_quad_state,
 369                         left,
 370                         left,
 371                         colors[kNumColors - 1 - (i % kNumColors)],
 372                         false);
 373
 374       SolidColorDrawQuad* right_quad =
 375           render_pass->CreateAndAppendDrawQuad<SolidColorDrawQuad>();
 376       right_quad->SetNew(
 377           shared_quad_state, right, right, colors[i % kNumColors], false);
 378     }
 379   }
 380 }
 381
 382 void DelegatedRendererLayerImpl::AppendRenderPassQuads(
 383     RenderPass* render_pass,
 384     const Occlusion& occlusion_in_content_space,
 385     const RenderPass* delegated_render_pass,
 386     const gfx::Size& frame_size) const {
 387   const SharedQuadState* delegated_shared_quad_state = nullptr;
 388   SharedQuadState* output_shared_quad_state = nullptr;
 389
 390   for (const auto& delegated_quad : delegated_render_pass->quad_list) {
 391     bool is_root_delegated_render_pass =
 392         delegated_render_pass == render_passes_in_draw_order_.back();
 393
 394     if (delegated_quad->shared_quad_state != delegated_shared_quad_state) {
 395       delegated_shared_quad_state = delegated_quad->shared_quad_state;
 396       output_shared_quad_state = render_pass->CreateAndAppendSharedQuadState();
 397       output_shared_quad_state->CopyFrom(delegated_shared_quad_state);
 398
 399       if (is_root_delegated_render_pass) {
 400         gfx::Transform delegated_frame_to_target_transform = draw_transform();
 401         delegated_frame_to_target_transform.Scale(inverse_device_scale_factor_,
 402                                                   inverse_device_scale_factor_);
 403
 404         output_shared_quad_state->content_to_target_transform.ConcatTransform(
 405             delegated_frame_to_target_transform);
 406
 407         if (render_target() == this) {
 408           DCHECK(!is_clipped());
 409           DCHECK(render_surface());
 410           DCHECK_EQ(0, num_unclipped_descendants());
 411           output_shared_quad_state->clip_rect =
 412               MathUtil::MapEnclosingClippedRect(
 413                   delegated_frame_to_target_transform,
 414                   output_shared_quad_state->clip_rect);
 415         } else {
 416           gfx::Rect clip_rect = drawable_content_rect();
 417           if (output_shared_quad_state->is_clipped) {
 418             clip_rect.Intersect(MathUtil::MapEnclosingClippedRect(
 419                 delegated_frame_to_target_transform,
 420                 output_shared_quad_state->clip_rect));
 421           }
 422           output_shared_quad_state->clip_rect = clip_rect;
 423           output_shared_quad_state->is_clipped = true;
 424         }
 425
 426         output_shared_quad_state->opacity *= draw_opacity();
 427       }
 428     }
 429     DCHECK(output_shared_quad_state);
 430
 431     gfx::Transform quad_content_to_delegated_target_space =
 432         output_shared_quad_state->content_to_target_transform;
 433     if (!is_root_delegated_render_pass) {
 434       quad_content_to_delegated_target_space.ConcatTransform(
 435           delegated_render_pass->transform_to_root_target);
 436       quad_content_to_delegated_target_space.ConcatTransform(draw_transform());
 437     }
 438
 439     Occlusion occlusion_in_quad_space =
 440         occlusion_in_content_space.GetOcclusionWithGivenDrawTransform(
 441             quad_content_to_delegated_target_space);
 442
 443     gfx::Rect quad_visible_rect =
 444         occlusion_in_quad_space.GetUnoccludedContentRect(
 445             delegated_quad->visible_rect);
 446
 447     if (quad_visible_rect.IsEmpty())
 448       continue;
 449
 450     if (delegated_quad->material != DrawQuad::RENDER_PASS) {
 451       DrawQuad* output_quad = render_pass->CopyFromAndAppendDrawQuad(
 452           delegated_quad, output_shared_quad_state);
 453       output_quad->visible_rect = quad_visible_rect;
 454     } else {
 455       RenderPassId delegated_contributing_render_pass_id =
 456           RenderPassDrawQuad::MaterialCast(delegated_quad)->render_pass_id;
 457       RenderPassId output_contributing_render_pass_id(-1, -1);
 458
 459       bool present =
 460           ConvertDelegatedRenderPassId(delegated_contributing_render_pass_id,
 461                                        &output_contributing_render_pass_id);
 462
 463       // The frame may have a RenderPassDrawQuad that points to a RenderPass not
 464       // part of the frame. Just ignore these quads.
 465       if (present) {
 466         DCHECK(output_contributing_render_pass_id != render_pass->id);
 467
 468         RenderPassDrawQuad* output_quad =
 469             render_pass->CopyFromAndAppendRenderPassDrawQuad(
 470                 RenderPassDrawQuad::MaterialCast(delegated_quad),
 471                 output_shared_quad_state,
 472                 output_contributing_render_pass_id);
 473         output_quad->visible_rect = quad_visible_rect;
 474       }
 475     }
 476   }
 477 }
 478
 479 const char* DelegatedRendererLayerImpl::LayerTypeAsString() const {
 480   return "cc::DelegatedRendererLayerImpl";
 481 }
 482
 483 void DelegatedRendererLayerImpl::ClearChildId() {
 484   if (!child_id_)
 485     return;
 486
 487   if (own_child_id_) {
 488     ResourceProvider* provider = layer_tree_impl()->resource_provider();
 489     provider->DestroyChild(child_id_);
 490   }
 491
 492   resources_.clear();
 493   child_id_ = 0;
 494 }
 495
 496 }  // namespace cc