gpu/command_buffer/client/program_info_manager.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/program_info_manager.h"
   6
   7 #include <map>
   8
   9 #include "base/compiler_specific.h"
  10 #include "base/synchronization/lock.h"
  11 #include "gpu/command_buffer/client/gles2_implementation.h"
  12 #include "gpu/command_buffer/common/gles2_cmd_utils.h"
  13
  14 namespace gpu {
  15 namespace gles2 {
  16
  17 class NonCachedProgramInfoManager : public ProgramInfoManager {
  18  public:
  19   NonCachedProgramInfoManager();
  20   virtual ~NonCachedProgramInfoManager();
  21
  22   virtual void CreateInfo(GLuint program) OVERRIDE;
  23
  24   virtual void DeleteInfo(GLuint program) OVERRIDE;
  25
  26   virtual bool GetProgramiv(GLES2Implementation* gl,
  27                             GLuint program,
  28                             GLenum pname,
  29                             GLint* params) OVERRIDE;
  30
  31   virtual GLint GetAttribLocation(GLES2Implementation* gl,
  32                                   GLuint program,
  33                                   const char* name) OVERRIDE;
  34
  35   virtual GLint GetUniformLocation(GLES2Implementation* gl,
  36                                    GLuint program,
  37                                    const char* name) OVERRIDE;
  38
  39   virtual bool GetActiveAttrib(GLES2Implementation* gl,
  40                                GLuint program,
  41                                GLuint index,
  42                                GLsizei bufsize,
  43                                GLsizei* length,
  44                                GLint* size,
  45                                GLenum* type,
  46                                char* name) OVERRIDE;
  47
  48   virtual bool GetActiveUniform(GLES2Implementation* gl,
  49                                 GLuint program,
  50                                 GLuint index,
  51                                 GLsizei bufsize,
  52                                 GLsizei* length,
  53                                 GLint* size,
  54                                 GLenum* type,
  55                                 char* name) OVERRIDE;
  56
  57 };
  58
  59 NonCachedProgramInfoManager::NonCachedProgramInfoManager() {
  60 }
  61
  62 NonCachedProgramInfoManager::~NonCachedProgramInfoManager() {
  63 }
  64
  65 void NonCachedProgramInfoManager::CreateInfo(GLuint /* program */) {
  66 }
  67
  68 void NonCachedProgramInfoManager::DeleteInfo(GLuint /* program */) {
  69 }
  70
  71 bool NonCachedProgramInfoManager::GetProgramiv(
  72     GLES2Implementation* /* gl */,
  73     GLuint /* program */,
  74     GLenum /* pname */,
  75     GLint* /* params */) {
  76   return false;
  77 }
  78
  79 GLint NonCachedProgramInfoManager::GetAttribLocation(
  80     GLES2Implementation* gl, GLuint program, const char* name) {
  81   return gl->GetAttribLocationHelper(program, name);
  82 }
  83
  84 GLint NonCachedProgramInfoManager::GetUniformLocation(
  85     GLES2Implementation* gl, GLuint program, const char* name) {
  86   return gl->GetUniformLocationHelper(program, name);
  87 }
  88
  89 bool NonCachedProgramInfoManager::GetActiveAttrib(
  90     GLES2Implementation* gl,
  91     GLuint program, GLuint index, GLsizei bufsize, GLsizei* length,
  92     GLint* size, GLenum* type, char* name) {
  93   return gl->GetActiveAttribHelper(
  94       program, index, bufsize, length, size, type, name);
  95 }
  96
  97 bool NonCachedProgramInfoManager::GetActiveUniform(
  98     GLES2Implementation* gl,
  99     GLuint program, GLuint index, GLsizei bufsize, GLsizei* length,
 100     GLint* size, GLenum* type, char* name) {
 101   return gl->GetActiveUniformHelper(
 102       program, index, bufsize, length, size, type, name);
 103 }
 104
 105 class CachedProgramInfoManager : public ProgramInfoManager {
 106  public:
 107   CachedProgramInfoManager();
 108   virtual ~CachedProgramInfoManager();
 109
 110   virtual void CreateInfo(GLuint program) OVERRIDE;
 111
 112   virtual void DeleteInfo(GLuint program) OVERRIDE;
 113
 114   virtual bool GetProgramiv(GLES2Implementation* gl,
 115                             GLuint program,
 116                             GLenum pname,
 117                             GLint* params) OVERRIDE;
 118
 119   virtual GLint GetAttribLocation(GLES2Implementation* gl,
 120                                   GLuint program,
 121                                   const char* name) OVERRIDE;
 122
 123   virtual GLint GetUniformLocation(GLES2Implementation* gl,
 124                                    GLuint program,
 125                                    const char* name) OVERRIDE;
 126
 127   virtual bool GetActiveAttrib(GLES2Implementation* gl,
 128                                GLuint program,
 129                                GLuint index,
 130                                GLsizei bufsize,
 131                                GLsizei* length,
 132                                GLint* size,
 133                                GLenum* type,
 134                                char* name) OVERRIDE;
 135
 136   virtual bool GetActiveUniform(GLES2Implementation* gl,
 137                                 GLuint program,
 138                                 GLuint index,
 139                                 GLsizei bufsize,
 140                                 GLsizei* length,
 141                                 GLint* size,
 142                                 GLenum* type,
 143                                 char* name) OVERRIDE;
 144
 145  private:
 146   class Program {
 147    public:
 148     struct UniformInfo {
 149       UniformInfo(GLsizei _size, GLenum _type, const std::string& _name);
 150
 151       GLsizei size;
 152       GLenum type;
 153       bool is_array;
 154       std::string name;
 155       std::vector<GLint> element_locations;
 156     };
 157     struct VertexAttrib {
 158       VertexAttrib(GLsizei _size, GLenum _type, const std::string& _name,
 159                        GLint _location)
 160           : size(_size),
 161             type(_type),
 162             location(_location),
 163             name(_name) {
 164       }
 165       GLsizei size;
 166       GLenum type;
 167       GLint location;
 168       std::string name;
 169     };
 170
 171     typedef std::vector<UniformInfo> UniformInfoVector;
 172     typedef std::vector<VertexAttrib> AttribInfoVector;
 173
 174     Program();
 175
 176     const AttribInfoVector& GetAttribInfos() const {
 177       return attrib_infos_;
 178     }
 179
 180     const VertexAttrib* GetAttribInfo(GLint index) const {
 181       return (static_cast<size_t>(index) < attrib_infos_.size()) ?
 182          &attrib_infos_[index] : NULL;
 183     }
 184
 185     GLint GetAttribLocation(const std::string& name) const;
 186
 187     const UniformInfo* GetUniformInfo(GLint index) const {
 188       return (static_cast<size_t>(index) < uniform_infos_.size()) ?
 189          &uniform_infos_[index] : NULL;
 190     }
 191
 192     // Gets the location of a uniform by name.
 193     GLint GetUniformLocation(const std::string& name) const;
 194
 195     bool GetProgramiv(GLenum pname, GLint* params);
 196
 197     // Updates the program info after a successful link.
 198     void Update(GLES2Implementation* gl, GLuint program);
 199
 200    private:
 201     bool cached_;
 202
 203     GLsizei max_attrib_name_length_;
 204
 205     // Attrib by index.
 206     AttribInfoVector attrib_infos_;
 207
 208     GLsizei max_uniform_name_length_;
 209
 210     // Uniform info by index.
 211     UniformInfoVector uniform_infos_;
 212
 213     // This is true if glLinkProgram was successful last time it was called.
 214     bool link_status_;
 215   };
 216
 217   Program* GetProgramInfo(GLES2Implementation* gl, GLuint program);
 218
 219   // TODO(gman): Switch to a faster container.
 220   typedef std::map<GLuint, Program> ProgramInfoMap;
 221
 222   ProgramInfoMap program_infos_;
 223
 224   mutable base::Lock lock_;
 225 };
 226
 227 CachedProgramInfoManager::Program::UniformInfo::UniformInfo(
 228     GLsizei _size, GLenum _type, const std::string& _name)
 229     : size(_size),
 230       type(_type),
 231       name(_name) {
 232   is_array = (!name.empty() && name[name.size() - 1] == ']');
 233   DCHECK(!(size > 1 && !is_array));
 234 }
 235
 236 CachedProgramInfoManager::Program::Program()
 237     : cached_(false),
 238       max_attrib_name_length_(0),
 239       max_uniform_name_length_(0),
 240       link_status_(false) {
 241 }
 242
 243 // TODO(gman): Add a faster lookup.
 244 GLint CachedProgramInfoManager::Program::GetAttribLocation(
 245     const std::string& name) const {
 246   for (GLuint ii = 0; ii < attrib_infos_.size(); ++ii) {
 247     const VertexAttrib& info = attrib_infos_[ii];
 248     if (info.name == name) {
 249       return info.location;
 250     }
 251   }
 252   return -1;
 253 }
 254
 255 GLint CachedProgramInfoManager::Program::GetUniformLocation(
 256     const std::string& name) const {
 257   bool getting_array_location = false;
 258   size_t open_pos = std::string::npos;
 259   int index = 0;
 260   if (!GLES2Util::ParseUniformName(
 261       name, &open_pos, &index, &getting_array_location)) {
 262     return -1;
 263   }
 264   for (GLuint ii = 0; ii < uniform_infos_.size(); ++ii) {
 265     const UniformInfo& info = uniform_infos_[ii];
 266     if (info.name == name ||
 267         (info.is_array &&
 268          info.name.compare(0, info.name.size() - 3, name) == 0)) {
 269       return info.element_locations[0];
 270     } else if (getting_array_location && info.is_array) {
 271       // Look for an array specification.
 272       size_t open_pos_2 = info.name.find_last_of('[');
 273       if (open_pos_2 == open_pos &&
 274           name.compare(0, open_pos, info.name, 0, open_pos) == 0) {
 275         if (index >= 0 && index < info.size) {
 276           return info.element_locations[index];
 277         }
 278       }
 279     }
 280   }
 281   return -1;
 282 }
 283
 284 bool CachedProgramInfoManager::Program::GetProgramiv(
 285     GLenum pname, GLint* params) {
 286   switch (pname) {
 287     case GL_LINK_STATUS:
 288       *params = link_status_;
 289       return true;
 290     case GL_ACTIVE_ATTRIBUTES:
 291       *params = attrib_infos_.size();
 292       return true;
 293     case GL_ACTIVE_ATTRIBUTE_MAX_LENGTH:
 294       *params = max_attrib_name_length_;
 295       return true;
 296     case GL_ACTIVE_UNIFORMS:
 297       *params = uniform_infos_.size();
 298       return true;
 299     case GL_ACTIVE_UNIFORM_MAX_LENGTH:
 300       *params = max_uniform_name_length_;
 301       return true;
 302     default:
 303       break;
 304   }
 305   return false;
 306 }
 307
 308 template<typename T> static T LocalGetAs(
 309     const std::vector<int8>& data, uint32 offset, size_t size) {
 310   const int8* p = &data[0] + offset;
 311   if (offset + size > data.size()) {
 312     NOTREACHED();
 313     return NULL;
 314   }
 315   return static_cast<T>(static_cast<const void*>(p));
 316 }
 317
 318 void CachedProgramInfoManager::Program::Update(
 319     GLES2Implementation* gl, GLuint program) {
 320   if (cached_) {
 321     return;
 322   }
 323   std::vector<int8> result;
 324   gl->GetProgramInfoCHROMIUMHelper(program, &result);
 325   if (result.empty()) {
 326     // This should only happen on a lost context.
 327     return;
 328   }
 329   DCHECK_GE(result.size(), sizeof(ProgramInfoHeader));
 330   const ProgramInfoHeader* header = LocalGetAs<const ProgramInfoHeader*>(
 331       result, 0, sizeof(header));
 332   link_status_ = header->link_status != 0;
 333   if (!link_status_) {
 334     return;
 335   }
 336   attrib_infos_.clear();
 337   uniform_infos_.clear();
 338   max_attrib_name_length_ = 0;
 339   max_uniform_name_length_ = 0;
 340   const ProgramInput* inputs = LocalGetAs<const ProgramInput*>(
 341       result, sizeof(*header),
 342       sizeof(ProgramInput) * (header->num_attribs + header->num_uniforms));
 343   const ProgramInput* input = inputs;
 344   for (uint32 ii = 0; ii < header->num_attribs; ++ii) {
 345     const int32* location = LocalGetAs<const int32*>(
 346         result, input->location_offset, sizeof(int32));
 347     const char* name_buf = LocalGetAs<const char*>(
 348         result, input->name_offset, input->name_length);
 349     std::string name(name_buf, input->name_length);
 350     attrib_infos_.push_back(
 351         VertexAttrib(input->size, input->type, name, *location));
 352     max_attrib_name_length_ = std::max(
 353         static_cast<GLsizei>(name.size() + 1), max_attrib_name_length_);
 354     ++input;
 355   }
 356   for (uint32 ii = 0; ii < header->num_uniforms; ++ii) {
 357     const int32* locations = LocalGetAs<const int32*>(
 358         result, input->location_offset, sizeof(int32) * input->size);
 359     const char* name_buf = LocalGetAs<const char*>(
 360         result, input->name_offset, input->name_length);
 361     std::string name(name_buf, input->name_length);
 362     UniformInfo info(input->size, input->type, name);
 363     max_uniform_name_length_ = std::max(
 364         static_cast<GLsizei>(name.size() + 1), max_uniform_name_length_);
 365     for (int32 jj = 0; jj < input->size; ++jj) {
 366       info.element_locations.push_back(locations[jj]);
 367     }
 368     uniform_infos_.push_back(info);
 369     ++input;
 370   }
 371   DCHECK_EQ(header->num_attribs + header->num_uniforms,
 372                 static_cast<uint32>(input - inputs));
 373   cached_ = true;
 374 }
 375
 376 CachedProgramInfoManager::CachedProgramInfoManager() {
 377 }
 378
 379 CachedProgramInfoManager::~CachedProgramInfoManager() {
 380
 381 }
 382
 383 CachedProgramInfoManager::Program*
 384     CachedProgramInfoManager::GetProgramInfo(
 385         GLES2Implementation* gl, GLuint program) {
 386   ProgramInfoMap::iterator it = program_infos_.find(program);
 387   if (it == program_infos_.end()) {
 388     return NULL;
 389   }
 390   Program* info = &it->second;
 391   info->Update(gl, program);
 392   return info;
 393 }
 394
 395 void CachedProgramInfoManager::CreateInfo(GLuint program) {
 396   base::AutoLock auto_lock(lock_);
 397   DeleteInfo(program);
 398   std::pair<ProgramInfoMap::iterator, bool> result =
 399       program_infos_.insert(std::make_pair(program, Program()));
 400
 401   DCHECK(result.second);
 402 }
 403
 404 void CachedProgramInfoManager::DeleteInfo(GLuint program) {
 405   program_infos_.erase(program);
 406 }
 407
 408 bool CachedProgramInfoManager::GetProgramiv(
 409     GLES2Implementation* gl, GLuint program, GLenum pname, GLint* params) {
 410   base::AutoLock auto_lock(lock_);
 411   Program* info = GetProgramInfo(gl, program);
 412   if (!info) {
 413     return false;
 414   }
 415   return info->GetProgramiv(pname, params);
 416 }
 417
 418 GLint CachedProgramInfoManager::GetAttribLocation(
 419     GLES2Implementation* gl, GLuint program, const char* name) {
 420   base::AutoLock auto_lock(lock_);
 421   Program* info = GetProgramInfo(gl, program);
 422   if (info) {
 423     return info->GetAttribLocation(name);
 424   }
 425   return gl->GetAttribLocationHelper(program, name);
 426 }
 427
 428 GLint CachedProgramInfoManager::GetUniformLocation(
 429     GLES2Implementation* gl, GLuint program, const char* name) {
 430   base::AutoLock auto_lock(lock_);
 431   Program* info = GetProgramInfo(gl, program);
 432   if (info) {
 433     return info->GetUniformLocation(name);
 434   }
 435   return gl->GetUniformLocationHelper(program, name);
 436 }
 437
 438 bool CachedProgramInfoManager::GetActiveAttrib(
 439     GLES2Implementation* gl,
 440     GLuint program, GLuint index, GLsizei bufsize, GLsizei* length,
 441     GLint* size, GLenum* type, char* name) {
 442   base::AutoLock auto_lock(lock_);
 443   Program* info = GetProgramInfo(gl, program);
 444   if (info) {
 445     const Program::VertexAttrib* attrib_info =
 446         info->GetAttribInfo(index);
 447     if (attrib_info) {
 448       if (size) {
 449         *size = attrib_info->size;
 450       }
 451       if (type) {
 452         *type = attrib_info->type;
 453       }
 454       if (length || name) {
 455         GLsizei max_size = std::min(static_cast<size_t>(bufsize) - 1,
 456                                     std::max(static_cast<size_t>(0),
 457                                              attrib_info->name.size()));
 458         if (length) {
 459           *length = max_size;
 460         }
 461         if (name && bufsize > 0) {
 462           memcpy(name, attrib_info->name.c_str(), max_size);
 463           name[max_size] = '\0';
 464         }
 465       }
 466       return true;
 467     }
 468   }
 469   return gl->GetActiveAttribHelper(
 470       program, index, bufsize, length, size, type, name);
 471 }
 472
 473 bool CachedProgramInfoManager::GetActiveUniform(
 474     GLES2Implementation* gl,
 475     GLuint program, GLuint index, GLsizei bufsize, GLsizei* length,
 476     GLint* size, GLenum* type, char* name) {
 477   base::AutoLock auto_lock(lock_);
 478   Program* info = GetProgramInfo(gl, program);
 479   if (info) {
 480     const Program::UniformInfo* uniform_info = info->GetUniformInfo(index);
 481     if (uniform_info) {
 482       if (size) {
 483         *size = uniform_info->size;
 484       }
 485       if (type) {
 486         *type = uniform_info->type;
 487       }
 488       if (length || name) {
 489         GLsizei max_size = std::min(static_cast<size_t>(bufsize) - 1,
 490                                     std::max(static_cast<size_t>(0),
 491                                              uniform_info->name.size()));
 492         if (length) {
 493           *length = max_size;
 494         }
 495         if (name && bufsize > 0) {
 496           memcpy(name, uniform_info->name.c_str(), max_size);
 497           name[max_size] = '\0';
 498         }
 499       }
 500       return true;
 501     }
 502   }
 503   return gl->GetActiveUniformHelper(
 504       program, index, bufsize, length, size, type, name);
 505 }
 506
 507 ProgramInfoManager::ProgramInfoManager() {
 508 }
 509
 510 ProgramInfoManager::~ProgramInfoManager() {
 511 }
 512
 513 ProgramInfoManager* ProgramInfoManager::Create(
 514     bool shared_resources_across_processes) {
 515   if (shared_resources_across_processes) {
 516     return new NonCachedProgramInfoManager();
 517   } else {
 518     return new CachedProgramInfoManager();
 519   }
 520 }
 521
 522 }  // namespace gles2
 523 }  // namespace gpu
 524