src/gpu/command_buffer/service/mailbox_synchronizer.cc

   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 #include "gpu/command_buffer/service/mailbox_synchronizer.h"
   6
   7 #include "base/bind.h"
   8 #include "gpu/command_buffer/service/mailbox_manager.h"
   9 #include "gpu/command_buffer/service/texture_manager.h"
  10 #include "ui/gl/gl_implementation.h"
  11
  12 namespace gpu {
  13 namespace gles2 {
  14
  15 namespace {
  16
  17 MailboxSynchronizer* g_instance = NULL;
  18
  19 }  // anonymous namespace
  20
  21 // static
  22 bool MailboxSynchronizer::Initialize() {
  23   DCHECK(!g_instance);
  24   DCHECK(gfx::GetGLImplementation() != gfx::kGLImplementationNone)
  25       << "GL bindings not initialized";
  26   switch (gfx::GetGLImplementation()) {
  27     case gfx::kGLImplementationMockGL:
  28       break;
  29     case gfx::kGLImplementationEGLGLES2:
  30 #if !defined(OS_MACOSX)
  31       {
  32         if (!gfx::g_driver_egl.ext.b_EGL_KHR_image_base ||
  33             !gfx::g_driver_egl.ext.b_EGL_KHR_gl_texture_2D_image ||
  34             !gfx::g_driver_gl.ext.b_GL_OES_EGL_image ||
  35             !gfx::g_driver_egl.ext.b_EGL_KHR_fence_sync) {
  36           LOG(WARNING) << "MailboxSync not supported due to missing EGL "
  37                           "image/fence support";
  38           return false;
  39         }
  40       }
  41       break;
  42 #endif
  43     default:
  44       NOTREACHED();
  45       return false;
  46   }
  47   g_instance = new MailboxSynchronizer;
  48   return true;
  49 }
  50
  51 // static
  52 void MailboxSynchronizer::Terminate() {
  53   DCHECK(g_instance);
  54   delete g_instance;
  55   g_instance = NULL;
  56 }
  57
  58 // static
  59 MailboxSynchronizer* MailboxSynchronizer::GetInstance() {
  60   return g_instance;
  61 }
  62
  63 MailboxSynchronizer::TargetName::TargetName(unsigned target,
  64                                             const Mailbox& mailbox)
  65     : target(target), mailbox(mailbox) {}
  66
  67 MailboxSynchronizer::TextureGroup::TextureGroup(
  68     const TextureDefinition& definition)
  69     : definition(definition) {}
  70
  71 MailboxSynchronizer::TextureGroup::~TextureGroup() {}
  72
  73 MailboxSynchronizer::TextureVersion::TextureVersion(
  74     linked_ptr<TextureGroup> group)
  75     : version(group->definition.version()), group(group) {}
  76
  77 MailboxSynchronizer::TextureVersion::~TextureVersion() {}
  78
  79 MailboxSynchronizer::MailboxSynchronizer() {}
  80
  81 MailboxSynchronizer::~MailboxSynchronizer() {
  82   DCHECK_EQ(0U, textures_.size());
  83 }
  84
  85 void MailboxSynchronizer::ReassociateMailboxLocked(
  86     const TargetName& target_name,
  87     TextureGroup* group) {
  88   lock_.AssertAcquired();
  89   for (TextureMap::iterator it = textures_.begin(); it != textures_.end();
  90        it++) {
  91     std::set<TargetName>::iterator mb_it =
  92         it->second.group->mailboxes.find(target_name);
  93     if (it->second.group != group &&
  94         mb_it != it->second.group->mailboxes.end()) {
  95       it->second.group->mailboxes.erase(mb_it);
  96     }
  97   }
  98   group->mailboxes.insert(target_name);
  99 }
 100
 101 linked_ptr<MailboxSynchronizer::TextureGroup>
 102 MailboxSynchronizer::GetGroupForMailboxLocked(const TargetName& target_name) {
 103   lock_.AssertAcquired();
 104   for (TextureMap::iterator it = textures_.begin(); it != textures_.end();
 105        it++) {
 106     std::set<TargetName>::const_iterator mb_it =
 107         it->second.group->mailboxes.find(target_name);
 108     if (mb_it != it->second.group->mailboxes.end())
 109       return it->second.group;
 110   }
 111   return make_linked_ptr<MailboxSynchronizer::TextureGroup>(NULL);
 112 }
 113
 114 Texture* MailboxSynchronizer::CreateTextureFromMailbox(unsigned target,
 115                                                        const Mailbox& mailbox) {
 116   base::AutoLock lock(lock_);
 117   TargetName target_name(target, mailbox);
 118   linked_ptr<TextureGroup> group = GetGroupForMailboxLocked(target_name);
 119   if (group.get()) {
 120     Texture* new_texture = group->definition.CreateTexture();
 121     if (new_texture)
 122       textures_.insert(std::make_pair(new_texture, TextureVersion(group)));
 123     return new_texture;
 124   }
 125
 126   return NULL;
 127 }
 128
 129 void MailboxSynchronizer::TextureDeleted(Texture* texture) {
 130   base::AutoLock lock(lock_);
 131   TextureMap::iterator it = textures_.find(texture);
 132   if (it != textures_.end()) {
 133     // TODO: We could avoid the update if this was the last ref.
 134     UpdateTextureLocked(it->first, it->second);
 135     textures_.erase(it);
 136   }
 137 }
 138
 139 void MailboxSynchronizer::PushTextureUpdates(MailboxManager* manager) {
 140   base::AutoLock lock(lock_);
 141   for (MailboxManager::MailboxToTextureMap::const_iterator texture_it =
 142            manager->mailbox_to_textures_.begin();
 143        texture_it != manager->mailbox_to_textures_.end();
 144        texture_it++) {
 145     TargetName target_name(texture_it->first.target, texture_it->first.mailbox);
 146     Texture* texture = texture_it->second->first;
 147     // TODO(sievers): crbug.com/352274
 148     // Should probably only fail if it already *has* mipmaps, while allowing
 149     // incomplete textures here. Also reconsider how to fail otherwise.
 150     bool needs_mips = texture->min_filter() != GL_NEAREST &&
 151                       texture->min_filter() != GL_LINEAR;
 152     if (target_name.target != GL_TEXTURE_2D || needs_mips)
 153       continue;
 154
 155     TextureMap::iterator it = textures_.find(texture);
 156     if (it != textures_.end()) {
 157       TextureVersion& texture_version = it->second;
 158       TextureGroup* group = texture_version.group.get();
 159       std::set<TargetName>::const_iterator mb_it =
 160           group->mailboxes.find(target_name);
 161       if (mb_it == group->mailboxes.end()) {
 162         // We previously did not associate this texture with the given mailbox.
 163         // Unlink other texture groups from the mailbox.
 164         ReassociateMailboxLocked(target_name, group);
 165       }
 166       UpdateTextureLocked(texture, texture_version);
 167
 168     } else {
 169       // Skip compositor resources/tile textures.
 170       // TODO: Remove this, see crbug.com/399226.
 171       if (texture->pool() == GL_TEXTURE_POOL_MANAGED_CHROMIUM)
 172         continue;
 173
 174       linked_ptr<TextureGroup> group = make_linked_ptr(new TextureGroup(
 175           TextureDefinition(target_name.target, texture, 1, NULL)));
 176
 177       // Unlink other textures from this mailbox in case the name is not new.
 178       ReassociateMailboxLocked(target_name, group.get());
 179       textures_.insert(std::make_pair(texture, TextureVersion(group)));
 180     }
 181   }
 182 }
 183
 184 void MailboxSynchronizer::UpdateTextureLocked(Texture* texture,
 185                                               TextureVersion& texture_version) {
 186   lock_.AssertAcquired();
 187   gfx::GLImage* gl_image = texture->GetLevelImage(texture->target(), 0);
 188   TextureGroup* group = texture_version.group.get();
 189   scoped_refptr<NativeImageBuffer> image_buffer = group->definition.image();
 190
 191   // Make sure we don't clobber with an older version
 192   if (!group->definition.IsOlderThan(texture_version.version))
 193     return;
 194
 195   // Also don't push redundant updates. Note that it would break the
 196   // versioning.
 197   if (group->definition.Matches(texture))
 198     return;
 199
 200   if (gl_image && !image_buffer->IsClient(gl_image)) {
 201     LOG(ERROR) << "MailboxSync: Incompatible attachment";
 202     return;
 203   }
 204
 205   group->definition = TextureDefinition(texture->target(),
 206                                         texture,
 207                                         ++texture_version.version,
 208                                         gl_image ? image_buffer : NULL);
 209 }
 210
 211 void MailboxSynchronizer::PullTextureUpdates(MailboxManager* manager) {
 212   base::AutoLock lock(lock_);
 213   for (MailboxManager::MailboxToTextureMap::const_iterator texture_it =
 214            manager->mailbox_to_textures_.begin();
 215        texture_it != manager->mailbox_to_textures_.end();
 216        texture_it++) {
 217     Texture* texture = texture_it->second->first;
 218     TextureMap::iterator it = textures_.find(texture);
 219     if (it != textures_.end()) {
 220       TextureDefinition& definition = it->second.group->definition;
 221       if (it->second.version == definition.version() ||
 222           definition.IsOlderThan(it->second.version))
 223         continue;
 224       it->second.version = definition.version();
 225       definition.UpdateTexture(texture);
 226     }
 227   }
 228 }
 229
 230 }  // namespace gles2
 231 }  // namespace gpu