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 // From gl2/gl2ext.h. 18 #ifndef GL_MAILBOX_SIZE_CHROMIUM 19 #define GL_MAILBOX_SIZE_CHROMIUM 64 20 #endif 21 22 typedef signed char GLbyte; 23 24 namespace gpu { 25 namespace gles2 { 26 27 class MailboxSynchronizer; 28 class Texture; 29 class TextureManager; 30 31 // Manages resources scoped beyond the context or context group level. 32 class GPU_EXPORT MailboxManager : public base::RefCounted<MailboxManager> { 33 public: 34 MailboxManager(); 35 36 // Generate a unique unguessable mailbox name. 37 void GenerateMailbox(Mailbox* mailbox); 38 39 // Look up the texture definition from the named mailbox. 40 Texture* ConsumeTexture(unsigned target, const Mailbox& mailbox); 41 42 // Put the texture into the named mailbox. 43 void ProduceTexture(unsigned target, 44 const Mailbox& mailbox, 45 Texture* texture); 46 47 // Returns whether this manager synchronizes with other instances. UsesSync()48 bool UsesSync() { return sync_ != NULL; } 49 50 // Used with the MailboxSynchronizer to push/pull texture state to/from 51 // other manager instances. 52 void PushTextureUpdates(); 53 void PullTextureUpdates(); 54 55 // Destroy any mailbox that reference the given texture. 56 void TextureDeleted(Texture* texture); 57 58 private: 59 friend class base::RefCounted<MailboxManager>; 60 friend class MailboxSynchronizer; 61 62 ~MailboxManager(); 63 64 struct TargetName { 65 TargetName(unsigned target, const Mailbox& mailbox); 66 unsigned target; 67 Mailbox mailbox; 68 }; 69 void InsertTexture(TargetName target_name, Texture* texture); 70 71 static bool TargetNameLess(const TargetName& lhs, const TargetName& rhs); 72 73 // This is a bidirectional map between mailbox and textures. We can have 74 // multiple mailboxes per texture, but one texture per mailbox. We keep an 75 // iterator in the MailboxToTextureMap to be able to manage changes to 76 // the TextureToMailboxMap efficiently. 77 typedef std::multimap<Texture*, TargetName> TextureToMailboxMap; 78 typedef std::map< 79 TargetName, 80 TextureToMailboxMap::iterator, 81 std::pointer_to_binary_function< 82 const TargetName&, const TargetName&, bool> > MailboxToTextureMap; 83 84 MailboxToTextureMap mailbox_to_textures_; 85 TextureToMailboxMap textures_to_mailboxes_; 86 87 MailboxSynchronizer* sync_; 88 89 DISALLOW_COPY_AND_ASSIGN(MailboxManager); 90 }; 91 } // namespage gles2 92 } // namespace gpu 93 94 #endif // GPU_COMMAND_BUFFER_SERVICE_MAILBOX_MANAGER_H_ 95 96 97