1 // Copyright 2014 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_SYNCHRONIZER_H_ 6 #define GPU_COMMAND_BUFFER_SERVICE_MAILBOX_SYNCHRONIZER_H_ 7 8 #include "gpu/command_buffer/common/mailbox.h" 9 10 #include <map> 11 #include <queue> 12 #include <set> 13 14 #include "base/memory/linked_ptr.h" 15 #include "base/synchronization/lock.h" 16 #include "gpu/command_buffer/service/texture_definition.h" 17 #include "gpu/gpu_export.h" 18 19 namespace gfx { 20 class GLFence; 21 } 22 23 namespace gpu { 24 namespace gles2 { 25 26 class MailboxManager; 27 class Texture; 28 29 // A thread-safe proxy that can be used to emulate texture sharing across 30 // share-groups. 31 class MailboxSynchronizer { 32 public: 33 ~MailboxSynchronizer(); 34 35 GPU_EXPORT static bool Initialize(); 36 GPU_EXPORT static void Terminate(); 37 static MailboxSynchronizer* GetInstance(); 38 39 // Create a texture from a globally visible mailbox. 40 Texture* CreateTextureFromMailbox(unsigned target, const Mailbox& mailbox); 41 42 void PushTextureUpdates(MailboxManager* manager, uint32 sync_point); 43 void PullTextureUpdates(MailboxManager* manager, uint32 sync_point); 44 45 void TextureDeleted(Texture* texture); 46 47 private: 48 MailboxSynchronizer(); 49 50 struct TargetName { 51 TargetName(unsigned target, const Mailbox& mailbox); 52 bool operator<(const TargetName& rhs) const { 53 return memcmp(this, &rhs, sizeof(rhs)) < 0; 54 } 55 bool operator!=(const TargetName& rhs) const { 56 return memcmp(this, &rhs, sizeof(rhs)) != 0; 57 } 58 bool operator==(const TargetName& rhs) const { 59 return !operator!=(rhs); 60 } 61 unsigned target; 62 Mailbox mailbox; 63 }; 64 65 base::Lock lock_; 66 67 struct TextureGroup { 68 explicit TextureGroup(const TextureDefinition& definition); 69 ~TextureGroup(); 70 71 TextureDefinition definition; 72 std::set<TargetName> mailboxes; 73 private: 74 DISALLOW_COPY_AND_ASSIGN(TextureGroup); 75 }; 76 77 struct TextureVersion { 78 explicit TextureVersion(linked_ptr<TextureGroup> group); 79 ~TextureVersion(); 80 81 unsigned int version; 82 linked_ptr<TextureGroup> group; 83 }; 84 typedef std::map<Texture*, TextureVersion> TextureMap; 85 TextureMap textures_; 86 87 linked_ptr<TextureGroup> GetGroupForMailboxLocked( 88 const TargetName& target_name); 89 void ReassociateMailboxLocked( 90 const TargetName& target_name, 91 TextureGroup* group); 92 void UpdateTextureLocked(Texture* texture, TextureVersion& texture_version); 93 void CreateFenceLocked(uint32 sync_point); 94 void AcquireFenceLocked(uint32 sync_point); 95 96 typedef std::map<uint32, linked_ptr<gfx::GLFence> > SyncPointToFenceMap; 97 SyncPointToFenceMap sync_point_to_fence_; 98 std::queue<SyncPointToFenceMap::iterator> sync_points_; 99 100 DISALLOW_COPY_AND_ASSIGN(MailboxSynchronizer); 101 }; 102 103 } // namespage gles2 104 } // namespace gpu 105 106 #endif // GPU_COMMAND_BUFFER_SERVICE_MAILBOX_SYNCHRONIZER_H_ 107 108