src/gpu/command_buffer/service/mailbox_manager.h

   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 Texture;
  23 class TextureManager;
  24
  25 // Manages resources scoped beyond the context or context group level.
  26 class GPU_EXPORT MailboxManager : public base::RefCounted<MailboxManager> {
  27  public:
  28   MailboxManager();
  29
  30   // Look up the texture definition from the named mailbox.
  31   Texture* ConsumeTexture(unsigned target, const Mailbox& mailbox);
  32
  33   // Put the texture into the named mailbox.
  34   void ProduceTexture(unsigned target,
  35                       const Mailbox& mailbox,
  36                       Texture* texture);
  37
  38   // Destroy any mailbox that reference the given texture.
  39   void TextureDeleted(Texture* texture);
  40
  41  private:
  42   friend class base::RefCounted<MailboxManager>;
  43
  44   ~MailboxManager();
  45
  46   struct TargetName {
  47     TargetName(unsigned target, const Mailbox& mailbox);
  48     unsigned target;
  49     Mailbox mailbox;
  50   };
  51
  52   static bool TargetNameLess(const TargetName& lhs, const TargetName& rhs);
  53
  54   // This is a bidirectional map between mailbox and textures. We can have
  55   // multiple mailboxes per texture, but one texture per mailbox. We keep an
  56   // iterator in the MailboxToTextureMap to be able to manage changes to
  57   // the TextureToMailboxMap efficiently.
  58   typedef std::multimap<Texture*, TargetName> TextureToMailboxMap;
  59   typedef std::map<TargetName,
  60                    TextureToMailboxMap::iterator,
  61                    std::pointer_to_binary_function<const TargetName&,
  62                                                    const TargetName&,
  63                                                    bool> > MailboxToTextureMap;
  64
  65   MailboxToTextureMap mailbox_to_textures_;
  66   TextureToMailboxMap textures_to_mailboxes_;
  67
  68   DISALLOW_COPY_AND_ASSIGN(MailboxManager);
  69 };
  70 }  // namespage gles2
  71 }  // namespace gpu
  72
  73 #endif  // GPU_COMMAND_BUFFER_SERVICE_MAILBOX_MANAGER_H_
  74