Break glScheduleCALayerCHROMIUM into smaller functions.

cc/output/gl_renderer.cc

 // Copyright 2010 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/output/gl_renderer.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 3613 matching lines @@
   // PrepareSurfaceForPass also clears the surface, which is not desired when
   // restoring.
   SetViewport();
 }
 
 bool GLRenderer::IsContextLost() {
   return gl_->GetGraphicsResetStatusKHR() != GL_NO_ERROR;
 }
 
 void GLRenderer::ScheduleCALayers(DrawingFrame* frame) {
+  scoped_refptr<CALayerOverlaySharedState> shared_state;
   for (const CALayerOverlay& ca_layer_overlay : frame->ca_layer_overlay_list) {
     unsigned texture_id = 0;
     if (ca_layer_overlay.contents_resource_id) {
       pending_overlay_resources_.push_back(
           base::WrapUnique(new ResourceProvider::ScopedReadLockGL(
               resource_provider_, ca_layer_overlay.contents_resource_id)));
       texture_id = pending_overlay_resources_.back()->texture_id();
     }
     GLfloat contents_rect[4] = {
         ca_layer_overlay.contents_rect.x(), ca_layer_overlay.contents_rect.y(),
         ca_layer_overlay.contents_rect.width(),
         ca_layer_overlay.contents_rect.height(),
     };
     GLfloat bounds_rect[4] = {
         ca_layer_overlay.bounds_rect.x(), ca_layer_overlay.bounds_rect.y(),
         ca_layer_overlay.bounds_rect.width(),
         ca_layer_overlay.bounds_rect.height(),
     };
     GLboolean is_clipped = ca_layer_overlay.shared_state->is_clipped;
     GLfloat clip_rect[4] = {ca_layer_overlay.shared_state->clip_rect.x(),
                             ca_layer_overlay.shared_state->clip_rect.y(),
                             ca_layer_overlay.shared_state->clip_rect.width(),
                             ca_layer_overlay.shared_state->clip_rect.height()};
     GLint sorting_context_id =
         ca_layer_overlay.shared_state->sorting_context_id;
     GLfloat transform[16];
     ca_layer_overlay.shared_state->transform.asColMajorf(transform);
     unsigned filter = ca_layer_overlay.filter;
+
+    if (ca_layer_overlay.shared_state != shared_state) {
+      shared_state = ca_layer_overlay.shared_state;
+      gl_->ScheduleCALayerSharedStateCHROMIUM(
+          ca_layer_overlay.shared_state->opacity, is_clipped, clip_rect,
+          sorting_context_id, transform);
+    }
     gl_->ScheduleCALayerCHROMIUM(
-        texture_id, contents_rect, ca_layer_overlay.shared_state->opacity,
-        ca_layer_overlay.background_color, ca_layer_overlay.edge_aa_mask,
-        bounds_rect, is_clipped, clip_rect, sorting_context_id, transform,
-        filter);
+        texture_id, contents_rect, ca_layer_overlay.background_color,
+        ca_layer_overlay.edge_aa_mask, bounds_rect, filter);
   }
 }
 
 void GLRenderer::ScheduleOverlays(DrawingFrame* frame) {
   if (frame->overlay_list.empty())
     return;
 
   OverlayCandidateList& overlays = frame->overlay_list;
   for (const OverlayCandidate& overlay : overlays) {
     unsigned texture_id = 0;
     if (overlay.use_output_surface_for_resource) {
       texture_id = output_surface_->GetOverlayTextureId();
       DCHECK(texture_id || IsContextLost());
     } else {
       pending_overlay_resources_.push_back(
           base::WrapUnique(new ResourceProvider::ScopedReadLockGL(
               resource_provider_, overlay.resource_id)));
       texture_id = pending_overlay_resources_.back()->texture_id();
     }
 
     context_support_->ScheduleOverlayPlane(
         overlay.plane_z_order, overlay.transform, texture_id,
         ToNearestRect(overlay.display_rect), overlay.uv_rect);
   }
 }
 
 }  // namespace cc