src/gpu/command_buffer/service/context_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/service/context_group.h"
   6
   7 #include <algorithm>
   8 #include <string>
   9
  10 #include "base/command_line.h"
  11 #include "base/strings/string_util.h"
  12 #include "base/sys_info.h"
  13 #include "gpu/command_buffer/common/id_allocator.h"
  14 #include "gpu/command_buffer/service/buffer_manager.h"
  15 #include "gpu/command_buffer/service/framebuffer_manager.h"
  16 #include "gpu/command_buffer/service/gles2_cmd_decoder.h"
  17 #include "gpu/command_buffer/service/gpu_switches.h"
  18 #include "gpu/command_buffer/service/mailbox_manager.h"
  19 #include "gpu/command_buffer/service/memory_tracking.h"
  20 #include "gpu/command_buffer/service/program_manager.h"
  21 #include "gpu/command_buffer/service/renderbuffer_manager.h"
  22 #include "gpu/command_buffer/service/shader_manager.h"
  23 #include "gpu/command_buffer/service/texture_manager.h"
  24 #include "gpu/command_buffer/service/transfer_buffer_manager.h"
  25 #include "ui/gl/gl_implementation.h"
  26
  27 namespace gpu {
  28 namespace gles2 {
  29
  30 ContextGroup::ContextGroup(
  31     MailboxManager* mailbox_manager,
  32     MemoryTracker* memory_tracker,
  33     ShaderTranslatorCache* shader_translator_cache,
  34     FeatureInfo* feature_info,
  35     bool bind_generates_resource)
  36     : mailbox_manager_(mailbox_manager ? mailbox_manager : new MailboxManager),
  37       memory_tracker_(memory_tracker),
  38       shader_translator_cache_(shader_translator_cache),
  39       enforce_gl_minimums_(CommandLine::ForCurrentProcess()->HasSwitch(
  40           switches::kEnforceGLMinimums)),
  41       bind_generates_resource_(bind_generates_resource),
  42       max_vertex_attribs_(0u),
  43       max_texture_units_(0u),
  44       max_texture_image_units_(0u),
  45       max_vertex_texture_image_units_(0u),
  46       max_fragment_uniform_vectors_(0u),
  47       max_varying_vectors_(0u),
  48       max_vertex_uniform_vectors_(0u),
  49       max_color_attachments_(1u),
  50       max_draw_buffers_(1u),
  51       program_cache_(NULL),
  52       feature_info_(feature_info ? feature_info : new FeatureInfo),
  53       draw_buffer_(GL_BACK) {
  54   {
  55     TransferBufferManager* manager = new TransferBufferManager();
  56     transfer_buffer_manager_.reset(manager);
  57     manager->Initialize();
  58   }
  59
  60   id_namespaces_[id_namespaces::kBuffers].reset(new IdAllocator);
  61   id_namespaces_[id_namespaces::kFramebuffers].reset(new IdAllocator);
  62   id_namespaces_[id_namespaces::kProgramsAndShaders].reset(
  63       new NonReusedIdAllocator);
  64   id_namespaces_[id_namespaces::kRenderbuffers].reset(new IdAllocator);
  65   id_namespaces_[id_namespaces::kTextures].reset(new IdAllocator);
  66   id_namespaces_[id_namespaces::kQueries].reset(new IdAllocator);
  67   id_namespaces_[id_namespaces::kVertexArrays].reset(new IdAllocator);
  68 }
  69
  70 static void GetIntegerv(GLenum pname, uint32* var) {
  71   GLint value = 0;
  72   glGetIntegerv(pname, &value);
  73   *var = value;
  74 }
  75
  76 bool ContextGroup::Initialize(
  77     GLES2Decoder* decoder,
  78     const DisallowedFeatures& disallowed_features) {
  79   // If we've already initialized the group just add the context.
  80   if (HaveContexts()) {
  81     decoders_.push_back(base::AsWeakPtr<GLES2Decoder>(decoder));
  82     return true;
  83   }
  84
  85   if (!feature_info_->Initialize(disallowed_features)) {
  86     LOG(ERROR) << "ContextGroup::Initialize failed because FeatureInfo "
  87                << "initialization failed.";
  88     return false;
  89   }
  90
  91   const GLint kMinRenderbufferSize = 512;  // GL says 1 pixel!
  92   GLint max_renderbuffer_size = 0;
  93   if (!QueryGLFeature(
  94       GL_MAX_RENDERBUFFER_SIZE, kMinRenderbufferSize,
  95       &max_renderbuffer_size)) {
  96     LOG(ERROR) << "ContextGroup::Initialize failed because maximum "
  97                << "renderbuffer size too small.";
  98     return false;
  99   }
 100   GLint max_samples = 0;
 101   if (feature_info_->feature_flags().chromium_framebuffer_multisample ||
 102       feature_info_->feature_flags().multisampled_render_to_texture) {
 103     if (feature_info_->feature_flags(
 104             ).use_img_for_multisampled_render_to_texture) {
 105       glGetIntegerv(GL_MAX_SAMPLES_IMG, &max_samples);
 106     } else {
 107       glGetIntegerv(GL_MAX_SAMPLES, &max_samples);
 108     }
 109   }
 110
 111   if (feature_info_->feature_flags().ext_draw_buffers) {
 112     GetIntegerv(GL_MAX_COLOR_ATTACHMENTS_EXT, &max_color_attachments_);
 113     if (max_color_attachments_ < 1)
 114       max_color_attachments_ = 1;
 115     GetIntegerv(GL_MAX_DRAW_BUFFERS_ARB, &max_draw_buffers_);
 116     if (max_draw_buffers_ < 1)
 117       max_draw_buffers_ = 1;
 118     draw_buffer_ = GL_BACK;
 119   }
 120
 121   const bool depth24_supported = feature_info_->feature_flags().oes_depth24;
 122
 123   buffer_manager_.reset(
 124       new BufferManager(memory_tracker_.get(), feature_info_.get()));
 125   framebuffer_manager_.reset(
 126       new FramebufferManager(max_draw_buffers_, max_color_attachments_));
 127   renderbuffer_manager_.reset(new RenderbufferManager(
 128       memory_tracker_.get(), max_renderbuffer_size, max_samples,
 129       depth24_supported));
 130   shader_manager_.reset(new ShaderManager());
 131
 132   // Lookup GL things we need to know.
 133   const GLint kGLES2RequiredMinimumVertexAttribs = 8u;
 134   if (!QueryGLFeatureU(
 135       GL_MAX_VERTEX_ATTRIBS, kGLES2RequiredMinimumVertexAttribs,
 136       &max_vertex_attribs_)) {
 137     LOG(ERROR) << "ContextGroup::Initialize failed because too few "
 138                << "vertex attributes supported.";
 139     return false;
 140   }
 141
 142   const GLuint kGLES2RequiredMinimumTextureUnits = 8u;
 143   if (!QueryGLFeatureU(
 144       GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS, kGLES2RequiredMinimumTextureUnits,
 145       &max_texture_units_)) {
 146     LOG(ERROR) << "ContextGroup::Initialize failed because too few "
 147                << "texture units supported.";
 148     return false;
 149   }
 150
 151   GLint max_texture_size = 0;
 152   GLint max_cube_map_texture_size = 0;
 153   const GLint kMinTextureSize = 2048;  // GL actually says 64!?!?
 154   const GLint kMinCubeMapSize = 256;  // GL actually says 16!?!?
 155   if (!QueryGLFeature(
 156       GL_MAX_TEXTURE_SIZE, kMinTextureSize, &max_texture_size) ||
 157       !QueryGLFeature(
 158       GL_MAX_CUBE_MAP_TEXTURE_SIZE, kMinCubeMapSize,
 159       &max_cube_map_texture_size)) {
 160     LOG(ERROR) << "ContextGroup::Initialize failed because maximum texture size"
 161                << "is too small.";
 162     return false;
 163   }
 164
 165   if (feature_info_->workarounds().max_texture_size) {
 166     max_texture_size = std::min(
 167         max_texture_size, feature_info_->workarounds().max_texture_size);
 168   }
 169   if (feature_info_->workarounds().max_cube_map_texture_size) {
 170     max_cube_map_texture_size = std::min(
 171         max_cube_map_texture_size,
 172         feature_info_->workarounds().max_cube_map_texture_size);
 173   }
 174
 175   texture_manager_.reset(new TextureManager(memory_tracker_.get(),
 176                                             feature_info_.get(),
 177                                             max_texture_size,
 178                                             max_cube_map_texture_size,
 179                                             bind_generates_resource_));
 180   texture_manager_->set_framebuffer_manager(framebuffer_manager_.get());
 181
 182   const GLint kMinTextureImageUnits = 8;
 183   const GLint kMinVertexTextureImageUnits = 0;
 184   if (!QueryGLFeatureU(
 185       GL_MAX_TEXTURE_IMAGE_UNITS, kMinTextureImageUnits,
 186       &max_texture_image_units_) ||
 187       !QueryGLFeatureU(
 188       GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS, kMinVertexTextureImageUnits,
 189       &max_vertex_texture_image_units_)) {
 190     LOG(ERROR) << "ContextGroup::Initialize failed because too few "
 191                << "texture units.";
 192     return false;
 193   }
 194
 195   if (gfx::GetGLImplementation() == gfx::kGLImplementationEGLGLES2) {
 196     GetIntegerv(GL_MAX_FRAGMENT_UNIFORM_VECTORS,
 197         &max_fragment_uniform_vectors_);
 198     GetIntegerv(GL_MAX_VARYING_VECTORS, &max_varying_vectors_);
 199     GetIntegerv(GL_MAX_VERTEX_UNIFORM_VECTORS, &max_vertex_uniform_vectors_);
 200   } else {
 201     GetIntegerv(
 202         GL_MAX_FRAGMENT_UNIFORM_COMPONENTS, &max_fragment_uniform_vectors_);
 203     max_fragment_uniform_vectors_ /= 4;
 204     GetIntegerv(GL_MAX_VARYING_FLOATS, &max_varying_vectors_);
 205     max_varying_vectors_ /= 4;
 206     GetIntegerv(GL_MAX_VERTEX_UNIFORM_COMPONENTS, &max_vertex_uniform_vectors_);
 207     max_vertex_uniform_vectors_ /= 4;
 208   }
 209
 210   const GLint kMinFragmentUniformVectors = 16;
 211   const GLint kMinVaryingVectors = 8;
 212   const GLint kMinVertexUniformVectors = 128;
 213   if (!CheckGLFeatureU(
 214       kMinFragmentUniformVectors, &max_fragment_uniform_vectors_) ||
 215       !CheckGLFeatureU(kMinVaryingVectors, &max_varying_vectors_) ||
 216       !CheckGLFeatureU(
 217       kMinVertexUniformVectors, &max_vertex_uniform_vectors_)) {
 218     LOG(ERROR) << "ContextGroup::Initialize failed because too few "
 219                << "uniforms or varyings supported.";
 220     return false;
 221   }
 222
 223   // Some shaders in Skia need more than the min available vertex and
 224   // fragment shader uniform vectors in case of OSMesa GL Implementation
 225   if (feature_info_->workarounds().max_fragment_uniform_vectors) {
 226     max_fragment_uniform_vectors_ = std::min(
 227         max_fragment_uniform_vectors_,
 228         static_cast<uint32>(
 229             feature_info_->workarounds().max_fragment_uniform_vectors));
 230   }
 231   if (feature_info_->workarounds().max_varying_vectors) {
 232     max_varying_vectors_ = std::min(
 233         max_varying_vectors_,
 234         static_cast<uint32>(feature_info_->workarounds().max_varying_vectors));
 235   }
 236   if (feature_info_->workarounds().max_vertex_uniform_vectors) {
 237     max_vertex_uniform_vectors_ =
 238         std::min(max_vertex_uniform_vectors_,
 239                  static_cast<uint32>(
 240                      feature_info_->workarounds().max_vertex_uniform_vectors));
 241   }
 242
 243   program_manager_.reset(new ProgramManager(
 244       program_cache_, max_varying_vectors_));
 245
 246   if (!texture_manager_->Initialize()) {
 247     LOG(ERROR) << "Context::Group::Initialize failed because texture manager "
 248                << "failed to initialize.";
 249     return false;
 250   }
 251
 252   decoders_.push_back(base::AsWeakPtr<GLES2Decoder>(decoder));
 253   return true;
 254 }
 255
 256 namespace {
 257
 258 bool IsNull(const base::WeakPtr<gles2::GLES2Decoder>& decoder) {
 259   return !decoder.get();
 260 }
 261
 262 template <typename T>
 263 class WeakPtrEquals {
 264  public:
 265   explicit WeakPtrEquals(T* t) : t_(t) {}
 266
 267   bool operator()(const base::WeakPtr<T>& t) {
 268     return t.get() == t_;
 269   }
 270
 271  private:
 272   T* const t_;
 273 };
 274
 275 }  // namespace anonymous
 276
 277 bool ContextGroup::HaveContexts() {
 278   decoders_.erase(std::remove_if(decoders_.begin(), decoders_.end(), IsNull),
 279                   decoders_.end());
 280   return !decoders_.empty();
 281 }
 282
 283 void ContextGroup::Destroy(GLES2Decoder* decoder, bool have_context) {
 284   decoders_.erase(std::remove_if(decoders_.begin(), decoders_.end(),
 285                                  WeakPtrEquals<gles2::GLES2Decoder>(decoder)),
 286                   decoders_.end());
 287   // If we still have contexts do nothing.
 288   if (HaveContexts()) {
 289     return;
 290   }
 291
 292   if (buffer_manager_ != NULL) {
 293     buffer_manager_->Destroy(have_context);
 294     buffer_manager_.reset();
 295   }
 296
 297   if (framebuffer_manager_ != NULL) {
 298     framebuffer_manager_->Destroy(have_context);
 299     if (texture_manager_)
 300       texture_manager_->set_framebuffer_manager(NULL);
 301     framebuffer_manager_.reset();
 302   }
 303
 304   if (renderbuffer_manager_ != NULL) {
 305     renderbuffer_manager_->Destroy(have_context);
 306     renderbuffer_manager_.reset();
 307   }
 308
 309   if (texture_manager_ != NULL) {
 310     texture_manager_->Destroy(have_context);
 311     texture_manager_.reset();
 312   }
 313
 314   if (program_manager_ != NULL) {
 315     program_manager_->Destroy(have_context);
 316     program_manager_.reset();
 317   }
 318
 319   if (shader_manager_ != NULL) {
 320     shader_manager_->Destroy(have_context);
 321     shader_manager_.reset();
 322   }
 323
 324   memory_tracker_ = NULL;
 325 }
 326
 327 IdAllocatorInterface* ContextGroup::GetIdAllocator(unsigned namespace_id) {
 328   if (namespace_id >= arraysize(id_namespaces_))
 329     return NULL;
 330
 331   return id_namespaces_[namespace_id].get();
 332 }
 333
 334 uint32 ContextGroup::GetMemRepresented() const {
 335   uint32 total = 0;
 336   if (buffer_manager_.get())
 337     total += buffer_manager_->mem_represented();
 338   if (renderbuffer_manager_.get())
 339     total += renderbuffer_manager_->mem_represented();
 340   if (texture_manager_.get())
 341     total += texture_manager_->mem_represented();
 342   return total;
 343 }
 344
 345 void ContextGroup::LoseContexts(GLenum reset_status) {
 346   for (size_t ii = 0; ii < decoders_.size(); ++ii) {
 347     if (decoders_[ii].get()) {
 348       decoders_[ii]->LoseContext(reset_status);
 349     }
 350   }
 351 }
 352
 353 ContextGroup::~ContextGroup() {
 354   CHECK(!HaveContexts());
 355 }
 356
 357 bool ContextGroup::CheckGLFeature(GLint min_required, GLint* v) {
 358   GLint value = *v;
 359   if (enforce_gl_minimums_) {
 360     value = std::min(min_required, value);
 361   }
 362   *v = value;
 363   return value >= min_required;
 364 }
 365
 366 bool ContextGroup::CheckGLFeatureU(GLint min_required, uint32* v) {
 367   GLint value = *v;
 368   if (enforce_gl_minimums_) {
 369     value = std::min(min_required, value);
 370   }
 371   *v = value;
 372   return value >= min_required;
 373 }
 374
 375 bool ContextGroup::QueryGLFeature(
 376     GLenum pname, GLint min_required, GLint* v) {
 377   GLint value = 0;
 378   glGetIntegerv(pname, &value);
 379   *v = value;
 380   return CheckGLFeature(min_required, v);
 381 }
 382
 383 bool ContextGroup::QueryGLFeatureU(
 384     GLenum pname, GLint min_required, uint32* v) {
 385   uint32 value = 0;
 386   GetIntegerv(pname, &value);
 387   bool result = CheckGLFeatureU(min_required, &value);
 388   *v = value;
 389   return result;
 390 }
 391
 392 }  // namespace gles2
 393 }  // namespace gpu