gpu/command_buffer/client/share_group.cc

   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 #include "gpu/command_buffer/client/atomicops.h"
   6 #include "gpu/command_buffer/client/gles2_implementation.h"
   7 #include "gpu/command_buffer/client/program_info_manager.h"
   8 #include "gpu/command_buffer/client/share_group.h"
   9 #include "gpu/command_buffer/common/id_allocator.h"
  10 #include "gpu/command_buffer/common/logging.h"
  11
  12 namespace gpu {
  13 namespace gles2 {
  14
  15 COMPILE_ASSERT(gpu::kInvalidResource == 0,
  16                INVALID_RESOURCE_NOT_0_AS_GL_EXPECTS);
  17
  18 // The standard id handler.
  19 class IdHandler : public IdHandlerInterface {
  20  public:
  21   IdHandler() { }
  22   virtual ~IdHandler() { }
  23
  24   // Overridden from IdHandlerInterface.
  25   virtual void MakeIds(
  26       GLES2Implementation* /* gl_impl */,
  27       GLuint id_offset, GLsizei n, GLuint* ids) OVERRIDE {
  28     if (id_offset == 0) {
  29       for (GLsizei ii = 0; ii < n; ++ii) {
  30         ids[ii] = id_allocator_.AllocateID();
  31       }
  32     } else {
  33       for (GLsizei ii = 0; ii < n; ++ii) {
  34         ids[ii] = id_allocator_.AllocateIDAtOrAbove(id_offset);
  35         id_offset = ids[ii] + 1;
  36       }
  37     }
  38   }
  39
  40   // Overridden from IdHandlerInterface.
  41   virtual bool FreeIds(
  42       GLES2Implementation* gl_impl,
  43       GLsizei n, const GLuint* ids, DeleteFn delete_fn) OVERRIDE {
  44     for (GLsizei ii = 0; ii < n; ++ii) {
  45       id_allocator_.FreeID(ids[ii]);
  46     }
  47     (gl_impl->*delete_fn)(n, ids);
  48     // We need to ensure that the delete call is evaluated on the service side
  49     // before any other contexts issue commands using these client ids.
  50     gl_impl->helper()->CommandBufferHelper::Flush();
  51     return true;
  52   }
  53
  54   // Overridden from IdHandlerInterface.
  55   virtual bool MarkAsUsedForBind(GLuint id) OVERRIDE {
  56     return id == 0 ? true : id_allocator_.MarkAsUsed(id);
  57   }
  58  protected:
  59   IdAllocator id_allocator_;
  60 };
  61
  62 // An id handler that require Gen before Bind.
  63 class StrictIdHandler : public IdHandler {
  64  public:
  65   StrictIdHandler() {}
  66   virtual ~StrictIdHandler() {}
  67
  68   // Overridden from IdHandler.
  69   virtual bool MarkAsUsedForBind(GLuint id) OVERRIDE {
  70     GPU_DCHECK(id == 0 || id_allocator_.InUse(id));
  71     return IdHandler::MarkAsUsedForBind(id);
  72   }
  73 };
  74
  75 // An id handler for ids that are never reused.
  76 class NonReusedIdHandler : public IdHandlerInterface {
  77  public:
  78   NonReusedIdHandler() : last_id_(0) {}
  79   virtual ~NonReusedIdHandler() {}
  80
  81   // Overridden from IdHandlerInterface.
  82   virtual void MakeIds(
  83       GLES2Implementation* /* gl_impl */,
  84       GLuint id_offset, GLsizei n, GLuint* ids) OVERRIDE {
  85     for (GLsizei ii = 0; ii < n; ++ii) {
  86       ids[ii] = ++last_id_ + id_offset;
  87     }
  88   }
  89
  90   // Overridden from IdHandlerInterface.
  91   virtual bool FreeIds(
  92       GLES2Implementation* gl_impl,
  93       GLsizei n, const GLuint* ids, DeleteFn delete_fn) OVERRIDE {
  94     // Ids are never freed.
  95     (gl_impl->*delete_fn)(n, ids);
  96     return true;
  97   }
  98
  99   // Overridden from IdHandlerInterface.
 100   virtual bool MarkAsUsedForBind(GLuint /* id */) OVERRIDE {
 101     // This is only used for Shaders and Programs which have no bind.
 102     return false;
 103   }
 104
 105  private:
 106   GLuint last_id_;
 107 };
 108
 109 // An id handler for shared ids.
 110 class SharedIdHandler : public IdHandlerInterface {
 111  public:
 112   SharedIdHandler(
 113       id_namespaces::IdNamespaces id_namespace)
 114       : id_namespace_(id_namespace) {
 115   }
 116
 117   virtual ~SharedIdHandler() {}
 118
 119   virtual void MakeIds(GLES2Implementation* gl_impl,
 120                        GLuint id_offset,
 121                        GLsizei n,
 122                        GLuint* ids) OVERRIDE {
 123     gl_impl->GenSharedIdsCHROMIUM(id_namespace_, id_offset, n, ids);
 124   }
 125
 126   virtual bool FreeIds(GLES2Implementation* gl_impl,
 127                        GLsizei n,
 128                        const GLuint* ids,
 129                        DeleteFn delete_fn) OVERRIDE {
 130     gl_impl->DeleteSharedIdsCHROMIUM(id_namespace_, n, ids);
 131     (gl_impl->*delete_fn)(n, ids);
 132     // We need to ensure that the delete call is evaluated on the service side
 133     // before any other contexts issue commands using these client ids.
 134     gl_impl->helper()->CommandBufferHelper::Flush();
 135     return true;
 136   }
 137
 138   virtual bool MarkAsUsedForBind(GLuint id) OVERRIDE {
 139     // This has no meaning for shared resources.
 140     return true;
 141   }
 142
 143  private:
 144   id_namespaces::IdNamespaces id_namespace_;
 145 };
 146
 147 class ThreadSafeIdHandlerWrapper : public IdHandlerInterface {
 148  public:
 149   ThreadSafeIdHandlerWrapper(IdHandlerInterface* id_handler)
 150       : id_handler_(id_handler) {
 151   }
 152   virtual ~ThreadSafeIdHandlerWrapper() { }
 153
 154   // Overridden from IdHandlerInterface.
 155   virtual void MakeIds(GLES2Implementation* gl_impl,
 156                        GLuint id_offset,
 157                        GLsizei n,
 158                        GLuint* ids) OVERRIDE {
 159     AutoLock auto_lock(lock_);
 160     id_handler_->MakeIds(gl_impl, id_offset, n, ids);
 161   }
 162
 163   // Overridden from IdHandlerInterface.
 164   virtual bool FreeIds(GLES2Implementation* gl_impl,
 165                        GLsizei n,
 166                        const GLuint* ids,
 167                        DeleteFn delete_fn) OVERRIDE {
 168     AutoLock auto_lock(lock_);
 169     return id_handler_->FreeIds(gl_impl, n, ids, delete_fn);
 170   }
 171
 172   // Overridden from IdHandlerInterface.
 173   virtual bool MarkAsUsedForBind(GLuint id) OVERRIDE {
 174     AutoLock auto_lock(lock_);
 175     return id_handler_->MarkAsUsedForBind(id);
 176   }
 177
 178  private:
 179    scoped_ptr<IdHandlerInterface> id_handler_;
 180    Lock lock_;
 181 };
 182
 183 ShareGroup::ShareGroup(bool bind_generates_resource)
 184     : bind_generates_resource_(bind_generates_resource) {
 185   if (bind_generates_resource) {
 186     for (int i = 0; i < id_namespaces::kNumIdNamespaces; ++i) {
 187       if (i == id_namespaces::kProgramsAndShaders) {
 188         id_handlers_[i].reset(new ThreadSafeIdHandlerWrapper(
 189             new NonReusedIdHandler()));
 190       } else {
 191         id_handlers_[i].reset(new ThreadSafeIdHandlerWrapper(
 192             new IdHandler()));
 193       }
 194     }
 195   } else {
 196     for (int i = 0; i < id_namespaces::kNumIdNamespaces; ++i) {
 197       if (i == id_namespaces::kProgramsAndShaders) {
 198         id_handlers_[i].reset(new ThreadSafeIdHandlerWrapper(
 199             new NonReusedIdHandler()));
 200       } else {
 201         id_handlers_[i].reset(new ThreadSafeIdHandlerWrapper(
 202             new StrictIdHandler()));
 203       }
 204     }
 205   }
 206   program_info_manager_.reset(ProgramInfoManager::Create(false));
 207 }
 208
 209 void ShareGroup::set_program_info_manager(ProgramInfoManager* manager) {
 210   program_info_manager_.reset(manager);
 211 }
 212
 213 ShareGroup::~ShareGroup() {}
 214
 215 }  // namespace gles2
 216 }  // namespace gpu