cc: Allow DeferredInitialize to use DelegatingRenderer

cc/trees/layer_tree_host_impl.cc

 // Copyright 2011 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 "cc/trees/layer_tree_host_impl.h"
 
 #include <algorithm>
 #include <limits>
 
 #include "base/basictypes.h"
@@ skipping 554 matching lines @@
   render_passes.push_back(render_pass.Pass());
 }
 
 static DrawMode GetDrawMode(OutputSurface* output_surface) {
   if (output_surface->ForcedDrawToSoftwareDevice()) {
     return DRAW_MODE_RESOURCELESS_SOFTWARE;
   } else if (output_surface->context_provider()) {
     return DRAW_MODE_HARDWARE;
   } else {
     DCHECK_EQ(!output_surface->software_device(),
-              output_surface->capabilities().delegated_rendering);
+              output_surface->capabilities().delegated_rendering &&
+                  !output_surface->capabilities().deferred_gl_initialization);

[danakj, 2014/05/16 22:44:29]

Can you << the two flags after the DCHECK so if it fails we know why since it'll
be lost in the &&?

[boliu, 2014/05/16 23:08:26]

Done.

     return DRAW_MODE_SOFTWARE;
   }
 }
 
 static void AppendQuadsForLayer(
     RenderPass* target_render_pass,
     LayerImpl* layer,
     const OcclusionTracker<LayerImpl>& occlusion_tracker,
     AppendQuadsData* append_quads_data) {
   QuadCuller quad_culler(target_render_pass, layer, occlusion_tracker);
@@ skipping 1220 matching lines @@
     pending_tree_->ReleaseResources();
   if (recycle_tree_)
     recycle_tree_->ReleaseResources();
 
   EvictAllUIResources();
 }
 
 void LayerTreeHostImpl::CreateAndSetRenderer(
     OutputSurface* output_surface,
     ResourceProvider* resource_provider,
-    bool skip_gl_renderer) {
+    bool force_software_renderer) {
   DCHECK(!renderer_);
-  if (output_surface->capabilities().delegated_rendering) {
+  if (output_surface->capabilities().delegated_rendering &&
+      !force_software_renderer) {
     renderer_ = DelegatingRenderer::Create(
         this, &settings_, output_surface, resource_provider);
-  } else if (output_surface->context_provider() && !skip_gl_renderer) {
+  } else if (output_surface->context_provider() && !force_software_renderer) {
     renderer_ = GLRenderer::Create(this,
                                    &settings_,
                                    output_surface,
                                    resource_provider,
                                    texture_mailbox_deleter_.get(),
                                    settings_.highp_threshold_min);
   } else if (output_surface->software_device()) {
     renderer_ = SoftwareRenderer::Create(
         this, &settings_, output_surface, resource_provider);
   }
@@ skipping 106 matching lines @@
       ResourceProvider::Create(output_surface.get(),
                                shared_bitmap_manager_,
                                settings_.highp_threshold_min,
                                settings_.use_rgba_4444_textures,
                                settings_.texture_id_allocation_chunk_size,
                                settings_.use_distance_field_text);
 
   if (output_surface->capabilities().deferred_gl_initialization)
     EnforceZeroBudget(true);
 
-  bool skip_gl_renderer = false;
+  bool force_software_renderer =
+      output_surface->capabilities().deferred_gl_initialization;
   CreateAndSetRenderer(
-      output_surface.get(), resource_provider.get(), skip_gl_renderer);
+      output_surface.get(), resource_provider.get(), force_software_renderer);
 
   transfer_buffer_memory_limit_ =
       GetMaxTransferBufferUsageBytes(output_surface->context_provider().get());
 
   if (settings_.impl_side_painting) {
     // Note: we use zero-copy rasterizer by default when the renderer is using
     // shared memory resources.
     bool use_zero_copy =
         (settings_.use_zero_copy ||
          GetRendererCapabilities().using_shared_memory_resources) &&
@@ skipping 47 matching lines @@
 void LayerTreeHostImpl::DeferredInitialize() {
   DCHECK(output_surface_->capabilities().deferred_gl_initialization);
   DCHECK(settings_.impl_side_painting);
   DCHECK(output_surface_->context_provider());
 
   ReleaseTreeResources();
   renderer_.reset();
 
   resource_provider_->InitializeGL();
 
-  bool skip_gl_renderer = false;
+  bool force_software_renderer = false;
   CreateAndSetRenderer(
-      output_surface_.get(), resource_provider_.get(), skip_gl_renderer);
+      output_surface_.get(), resource_provider_.get(), force_software_renderer);
 
   EnforceZeroBudget(false);
   client_->SetNeedsCommitOnImplThread();
 }
 
 void LayerTreeHostImpl::ReleaseGL() {
   DCHECK(output_surface_->capabilities().deferred_gl_initialization);
   DCHECK(settings_.impl_side_painting);
   DCHECK(output_surface_->context_provider());
 
   ReleaseTreeResources();
   renderer_.reset();
   tile_manager_.reset();
   resource_pool_.reset();
   raster_worker_pool_.reset();
   direct_raster_worker_pool_.reset();
   staging_resource_pool_.reset();
   resource_provider_->InitializeSoftware();
 
-  bool skip_gl_renderer = true;
+  bool force_software_renderer = true;
   CreateAndSetRenderer(
-      output_surface_.get(), resource_provider_.get(), skip_gl_renderer);
+      output_surface_.get(), resource_provider_.get(), force_software_renderer);
 
   EnforceZeroBudget(true);
   DCHECK(GetRendererCapabilities().using_map_image);
   CreateAndSetTileManager(resource_provider_.get(),
                           NULL,
                           true,
                           false,
                           GetRendererCapabilities().allow_rasterize_on_demand);
   DCHECK(tile_manager_);
 
@@ skipping 1070 matching lines @@
   swap_promise_monitor_.erase(monitor);
 }
 
 void LayerTreeHostImpl::NotifySwapPromiseMonitorsOfSetNeedsRedraw() {
   std::set<SwapPromiseMonitor*>::iterator it = swap_promise_monitor_.begin();
   for (; it != swap_promise_monitor_.end(); it++)
     (*it)->OnSetNeedsRedrawOnImpl();
 }
 
 }  // namespace cc