1 // Copyright (c) 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 #ifndef GPU_COMMAND_BUFFER_SERVICE_MAILBOX_MANAGER_H_ 6 #define GPU_COMMAND_BUFFER_SERVICE_MAILBOX_MANAGER_H_ 7 8 #include <functional> 9 #include <map> 10 11 #include "base/memory/linked_ptr.h" 12 #include "base/memory/ref_counted.h" 13 #include "gpu/command_buffer/common/constants.h" 14 #include "gpu/command_buffer/common/mailbox.h" 15 #include "gpu/gpu_export.h" 16 17 typedef signed char GLbyte; 18 19 namespace gpu { 20 namespace gles2 { 21 22 class MailboxSynchronizer; 23 class Texture; 24 class TextureManager; 25 26 // Manages resources scoped beyond the context or context group level. 27 class GPU_EXPORT MailboxManager : public base::RefCounted<MailboxManager> { 28 public: 29 MailboxManager(); 30 31 // Look up the texture definition from the named mailbox. 32 Texture* ConsumeTexture(unsigned target, const Mailbox& mailbox); 33 34 // Put the texture into the named mailbox. 35 void ProduceTexture(unsigned target, 36 const Mailbox& mailbox, 37 Texture* texture); 38 39 // Returns whether this manager synchronizes with other instances. UsesSync()40 bool UsesSync() { return sync_ != NULL; } 41 42 // Used with the MailboxSynchronizer to push/pull texture state to/from 43 // other manager instances. 44 void PushTextureUpdates(); 45 void PullTextureUpdates(); 46 47 // Destroy any mailbox that reference the given texture. 48 void TextureDeleted(Texture* texture); 49 50 private: 51 friend class base::RefCounted<MailboxManager>; 52 friend class MailboxSynchronizer; 53 54 ~MailboxManager(); 55 56 struct TargetName { 57 TargetName(unsigned target, const Mailbox& mailbox); 58 unsigned target; 59 Mailbox mailbox; 60 }; 61 void InsertTexture(TargetName target_name, Texture* texture); 62 63 static bool TargetNameLess(const TargetName& lhs, const TargetName& rhs); 64 65 // This is a bidirectional map between mailbox and textures. We can have 66 // multiple mailboxes per texture, but one texture per mailbox. We keep an 67 // iterator in the MailboxToTextureMap to be able to manage changes to 68 // the TextureToMailboxMap efficiently. 69 typedef std::multimap<Texture*, TargetName> TextureToMailboxMap; 70 typedef std::map<TargetName, 71 TextureToMailboxMap::iterator, 72 std::pointer_to_binary_function<const TargetName&, 73 const TargetName&, 74 bool> > MailboxToTextureMap; 75 76 MailboxToTextureMap mailbox_to_textures_; 77 TextureToMailboxMap textures_to_mailboxes_; 78 79 MailboxSynchronizer* sync_; 80 81 DISALLOW_COPY_AND_ASSIGN(MailboxManager); 82 }; 83 } // namespage gles2 84 } // namespace gpu 85 86 #endif // GPU_COMMAND_BUFFER_SERVICE_MAILBOX_MANAGER_H_ 87 88