cc: Reduce command buffer flushes related to creating texture ids.

cc/resources/resource_provider.h

 // Copyright 2012 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.
 
 #ifndef CC_RESOURCES_RESOURCE_PROVIDER_H_
 #define CC_RESOURCES_RESOURCE_PROVIDER_H_
 
 #include <deque>
 #include <set>
 #include <string>
@@ skipping 47 matching lines @@
   enum ResourceType {
     InvalidType = 0,
     GLTexture = 1,
     Bitmap,
   };
 
   static scoped_ptr<ResourceProvider> Create(
       OutputSurface* output_surface,
       SharedBitmapManager* shared_bitmap_manager,
       int highp_threshold_min,
-      bool use_rgba_4444_texture_format);
+      bool use_rgba_4444_texture_format,
+      size_t texture_id_allocation_chunk_size);
   virtual ~ResourceProvider();
 
   void InitializeSoftware();
   bool InitializeGL();
 
   void DidLoseOutputSurface() { lost_output_surface_ = true; }
 
   int max_texture_size() const { return max_texture_size_; }
   ResourceFormat memory_efficient_texture_format() const {
     return use_rgba_4444_texture_format_ ? RGBA_4444 : best_texture_format_;
@@ skipping 346 matching lines @@
   typedef base::hash_map<int, Child> ChildMap;
 
   bool ReadLockFenceHasPassed(Resource* resource) {
     return !resource->read_lock_fence.get() ||
            resource->read_lock_fence->HasPassed();
   }
 
   ResourceProvider(OutputSurface* output_surface,
                    SharedBitmapManager* shared_bitmap_manager,
                    int highp_threshold_min,
-                   bool use_rgba_4444_texture_format);
+                   bool use_rgba_4444_texture_format,
+                   size_t texture_id_allocation_chunk_size);
 
   void CleanUpGLIfNeeded();
 
   Resource* GetResource(ResourceId id);
   const Resource* LockForRead(ResourceId id);
   void UnlockForRead(ResourceId id);
   const Resource* LockForWrite(ResourceId id);
   void UnlockForWrite(ResourceId id);
   static void PopulateSkBitmapWithResource(SkBitmap* sk_bitmap,
                                            const Resource* resource);
@@ skipping 16 matching lines @@
   // specified filter for both minification and magnification. The resource
   // must be locked for reading.
   void BindForSampling(ResourceProvider::ResourceId resource_id,
                        GLenum target,
                        GLenum unit,
                        GLenum filter);
 
   // Returns NULL if the output_surface_ does not have a ContextProvider.
   WebKit::WebGraphicsContext3D* Context3d() const;
 
+  unsigned NextTextureId();
+
   OutputSurface* output_surface_;
   SharedBitmapManager* shared_bitmap_manager_;
   bool lost_output_surface_;
   int highp_threshold_min_;
   ResourceId next_id_;
   ResourceMap resources_;
   int next_child_;
   ChildMap children_;
 
   ResourceType default_resource_type_;
   bool use_texture_storage_ext_;
   bool use_texture_usage_hint_;
   bool use_shallow_flush_;
   bool use_compressed_texture_etc1_;
   scoped_ptr<TextureUploader> texture_uploader_;
   int max_texture_size_;
   ResourceFormat best_texture_format_;
 
   base::ThreadChecker thread_checker_;
 
   scoped_refptr<Fence> current_read_lock_fence_;
   bool use_rgba_4444_texture_format_;
 
+  size_t texture_id_allocation_chunk_size_;
+  std::deque<unsigned> unused_texture_ids_;
+
   DISALLOW_COPY_AND_ASSIGN(ResourceProvider);
 };
 
 
 // TODO(epenner): Move these format conversions to resource_format.h
 // once that builds on mac (npapi.h currently #includes OpenGL.h).
 inline unsigned BitsPerPixel(ResourceFormat format) {
   DCHECK_LE(format, RESOURCE_FORMAT_MAX);
   static const unsigned format_bits_per_pixel[RESOURCE_FORMAT_MAX + 1] = {
     32,  // RGBA_8888
@@ skipping 32 matching lines @@
   return format_gl_data_format[format];
 }
 
 inline GLenum GLInternalFormat(ResourceFormat format) {
   return GLDataFormat(format);
 }
 
 }  // namespace cc
 
 #endif  // CC_RESOURCES_RESOURCE_PROVIDER_H_