gpu/command_buffer/service/texture_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/service/texture_manager.h"
   6
   7 #include <algorithm>
   8 #include <set>
   9 #include <utility>
  10
  11 #include "base/bits.h"
  12 #include "base/lazy_instance.h"
  13 #include "base/strings/stringprintf.h"
  14 #include "base/thread_task_runner_handle.h"
  15 #include "base/trace_event/memory_dump_manager.h"
  16 #include "gpu/command_buffer/common/gles2_cmd_utils.h"
  17 #include "gpu/command_buffer/service/context_state.h"
  18 #include "gpu/command_buffer/service/error_state.h"
  19 #include "gpu/command_buffer/service/feature_info.h"
  20 #include "gpu/command_buffer/service/framebuffer_manager.h"
  21 #include "gpu/command_buffer/service/gles2_cmd_decoder.h"
  22 #include "gpu/command_buffer/service/mailbox_manager.h"
  23 #include "gpu/command_buffer/service/memory_tracking.h"
  24 #include "ui/gl/gl_implementation.h"
  25 #include "ui/gl/trace_util.h"
  26
  27 namespace gpu {
  28 namespace gles2 {
  29
  30 namespace {
  31
  32 // This should contain everything to uniquely identify a Texture.
  33 const char TextureTag[] = "|Texture|";
  34 struct TextureSignature {
  35   GLenum target_;
  36   GLint level_;
  37   GLenum min_filter_;
  38   GLenum mag_filter_;
  39   GLenum wrap_r_;
  40   GLenum wrap_s_;
  41   GLenum wrap_t_;
  42   GLenum usage_;
  43   GLenum internal_format_;
  44   GLenum compare_func_;
  45   GLenum compare_mode_;
  46   GLsizei width_;
  47   GLsizei height_;
  48   GLsizei depth_;
  49   GLfloat max_lod_;
  50   GLfloat min_lod_;
  51   GLint base_level_;
  52   GLint border_;
  53   GLint max_level_;
  54   GLenum format_;
  55   GLenum type_;
  56   bool has_image_;
  57   bool can_render_;
  58   bool can_render_to_;
  59   bool npot_;
  60
  61   // Since we will be hashing this signature structure, the padding must be
  62   // zero initialized. Although the C++11 specifications specify that this is
  63   // true, we will use a constructor with a memset to further enforce it instead
  64   // of relying on compilers adhering to this deep dark corner specification.
  65   TextureSignature(GLenum target,
  66                    GLint level,
  67                    GLenum min_filter,
  68                    GLenum mag_filter,
  69                    GLenum wrap_r,
  70                    GLenum wrap_s,
  71                    GLenum wrap_t,
  72                    GLenum usage,
  73                    GLenum internal_format,
  74                    GLenum compare_func,
  75                    GLenum compare_mode,
  76                    GLsizei width,
  77                    GLsizei height,
  78                    GLsizei depth,
  79                    GLfloat max_lod,
  80                    GLfloat min_lod,
  81                    GLint base_level,
  82                    GLint border,
  83                    GLint max_level,
  84                    GLenum format,
  85                    GLenum type,
  86                    bool has_image,
  87                    bool can_render,
  88                    bool can_render_to,
  89                    bool npot) {
  90     memset(this, 0, sizeof(TextureSignature));
  91     target_ = target;
  92     level_ = level;
  93     min_filter_ = min_filter;
  94     mag_filter_ = mag_filter;
  95     wrap_r_ = wrap_r;
  96     wrap_s_ = wrap_s;
  97     wrap_t_ = wrap_t;
  98     usage_ = usage;
  99     internal_format_ = internal_format;
 100     compare_func_ = compare_func;
 101     compare_mode_ = compare_mode;
 102     width_ = width;
 103     height_ = height;
 104     depth_ = depth;
 105     max_lod_ = max_lod;
 106     min_lod_ = min_lod;
 107     base_level_ = base_level;
 108     border_ = border;
 109     max_level_ = max_level;
 110     format_ = format;
 111     type_ = type;
 112     has_image_ = has_image;
 113     can_render_ = can_render;
 114     can_render_to_ = can_render_to;
 115     npot_ = npot;
 116   }
 117 };
 118
 119 class FormatTypeValidator {
 120  public:
 121   FormatTypeValidator() {
 122     static const FormatType kSupportedFormatTypes[] = {
 123         // ES2.
 124         { GL_RGB, GL_RGB, GL_UNSIGNED_BYTE },
 125         { GL_RGB, GL_RGB, GL_UNSIGNED_SHORT_5_6_5 },
 126         { GL_RGBA, GL_RGBA, GL_UNSIGNED_BYTE },
 127         { GL_RGBA, GL_RGBA, GL_UNSIGNED_SHORT_4_4_4_4 },
 128         { GL_RGBA, GL_RGBA, GL_UNSIGNED_SHORT_5_5_5_1 },
 129         { GL_LUMINANCE_ALPHA, GL_LUMINANCE_ALPHA, GL_UNSIGNED_BYTE },
 130         { GL_LUMINANCE, GL_LUMINANCE, GL_UNSIGNED_BYTE },
 131         { GL_ALPHA, GL_ALPHA, GL_UNSIGNED_BYTE },
 132         // Exposed by GL_OES_texture_float and GL_OES_texture_half_float
 133         { GL_RGB, GL_RGB, GL_FLOAT },
 134         { GL_RGBA, GL_RGBA, GL_FLOAT },
 135         { GL_LUMINANCE_ALPHA, GL_LUMINANCE_ALPHA, GL_FLOAT },
 136         { GL_LUMINANCE, GL_LUMINANCE, GL_FLOAT },
 137         { GL_ALPHA, GL_ALPHA, GL_FLOAT },
 138         { GL_RGB, GL_RGB, GL_HALF_FLOAT_OES },
 139         { GL_RGBA, GL_RGBA, GL_HALF_FLOAT_OES },
 140         { GL_LUMINANCE_ALPHA, GL_LUMINANCE_ALPHA, GL_HALF_FLOAT_OES },
 141         { GL_LUMINANCE, GL_LUMINANCE, GL_HALF_FLOAT_OES },
 142         { GL_ALPHA, GL_ALPHA, GL_HALF_FLOAT_OES },
 143         // Exposed by GL_ANGLE_depth_texture
 144         { GL_DEPTH_COMPONENT, GL_DEPTH_COMPONENT, GL_UNSIGNED_SHORT },
 145         { GL_DEPTH_COMPONENT, GL_DEPTH_COMPONENT, GL_UNSIGNED_INT },
 146         { GL_DEPTH_STENCIL, GL_DEPTH_STENCIL, GL_UNSIGNED_INT_24_8 },
 147         // Exposed by GL_EXT_sRGB
 148         { GL_SRGB, GL_SRGB, GL_UNSIGNED_BYTE },
 149         { GL_SRGB_ALPHA, GL_SRGB_ALPHA, GL_UNSIGNED_BYTE },
 150         // Exposed by GL_EXT_texture_format_BGRA8888
 151         { GL_BGRA_EXT, GL_BGRA_EXT, GL_UNSIGNED_BYTE },
 152         // Exposed by GL_EXT_texture_rg
 153         { GL_RED, GL_RED, GL_UNSIGNED_BYTE },
 154         { GL_RG, GL_RG, GL_UNSIGNED_BYTE },
 155         { GL_RED, GL_RED, GL_FLOAT },
 156         { GL_RG, GL_RG, GL_FLOAT },
 157         { GL_RED, GL_RED, GL_HALF_FLOAT_OES },
 158         { GL_RG, GL_RG, GL_HALF_FLOAT_OES },
 159
 160         // ES3.
 161         { GL_R8, GL_RED, GL_UNSIGNED_BYTE },
 162         { GL_R8_SNORM, GL_RED, GL_BYTE },
 163         { GL_R16F, GL_RED, GL_HALF_FLOAT },
 164         { GL_R16F, GL_RED, GL_FLOAT },
 165         { GL_R32F, GL_RED, GL_FLOAT },
 166         { GL_R8UI, GL_RED_INTEGER, GL_UNSIGNED_BYTE },
 167         { GL_R8I, GL_RED_INTEGER, GL_BYTE },
 168         { GL_R16UI, GL_RED_INTEGER, GL_UNSIGNED_SHORT },
 169         { GL_R16I, GL_RED_INTEGER, GL_SHORT },
 170         { GL_R32UI, GL_RED_INTEGER, GL_UNSIGNED_INT },
 171         { GL_R32I, GL_RED_INTEGER, GL_INT },
 172         { GL_RG8, GL_RG, GL_UNSIGNED_BYTE },
 173         { GL_RG8_SNORM, GL_RG, GL_BYTE },
 174         { GL_RG16F, GL_RG, GL_HALF_FLOAT },
 175         { GL_RG16F, GL_RG, GL_FLOAT },
 176         { GL_RG32F, GL_RG, GL_FLOAT },
 177         { GL_RG8UI, GL_RG_INTEGER, GL_UNSIGNED_BYTE },
 178         { GL_RG8I, GL_RG_INTEGER, GL_BYTE },
 179         { GL_RG16UI, GL_RG_INTEGER, GL_UNSIGNED_SHORT },
 180         { GL_RG16I, GL_RG_INTEGER, GL_SHORT },
 181         { GL_RG32UI, GL_RG_INTEGER, GL_UNSIGNED_INT },
 182         { GL_RG32I, GL_RG_INTEGER, GL_INT },
 183         { GL_RGB8, GL_RGB, GL_UNSIGNED_BYTE },
 184         { GL_SRGB8, GL_RGB, GL_UNSIGNED_BYTE },
 185         { GL_RGB565, GL_RGB, GL_UNSIGNED_BYTE, },
 186         { GL_RGB565, GL_RGB, GL_UNSIGNED_SHORT_5_6_5 },
 187         { GL_RGB8_SNORM, GL_RGB, GL_BYTE },
 188         { GL_R11F_G11F_B10F, GL_RGB, GL_UNSIGNED_INT_10F_11F_11F_REV },
 189         { GL_R11F_G11F_B10F, GL_RGB, GL_HALF_FLOAT },
 190         { GL_R11F_G11F_B10F, GL_RGB, GL_FLOAT },
 191         { GL_RGB9_E5, GL_RGB, GL_UNSIGNED_INT_5_9_9_9_REV },
 192         { GL_RGB9_E5, GL_RGB, GL_HALF_FLOAT },
 193         { GL_RGB9_E5, GL_RGB, GL_FLOAT },
 194         { GL_RGB16F, GL_RGB, GL_HALF_FLOAT },
 195         { GL_RGB16F, GL_RGB, GL_FLOAT },
 196         { GL_RGB32F, GL_RGB, GL_FLOAT },
 197         { GL_RGB8UI, GL_RGB_INTEGER, GL_UNSIGNED_BYTE },
 198         { GL_RGB8I, GL_RGB_INTEGER, GL_BYTE },
 199         { GL_RGB16UI, GL_RGB_INTEGER, GL_UNSIGNED_SHORT },
 200         { GL_RGB16I, GL_RGB_INTEGER, GL_SHORT },
 201         { GL_RGB32UI, GL_RGB_INTEGER, GL_UNSIGNED_INT },
 202         { GL_RGB32I, GL_RGB_INTEGER, GL_INT },
 203         { GL_RGBA8, GL_RGBA, GL_UNSIGNED_BYTE },
 204         { GL_SRGB8_ALPHA8, GL_RGBA, GL_UNSIGNED_BYTE },
 205         { GL_RGBA8_SNORM, GL_RGBA, GL_BYTE },
 206         { GL_RGB5_A1, GL_RGBA, GL_UNSIGNED_BYTE },
 207         { GL_RGB5_A1, GL_RGBA, GL_UNSIGNED_SHORT_5_5_5_1 },
 208         { GL_RGB5_A1, GL_RGBA, GL_UNSIGNED_INT_2_10_10_10_REV },
 209         { GL_RGBA4, GL_RGBA, GL_UNSIGNED_BYTE },
 210         { GL_RGBA4, GL_RGBA, GL_UNSIGNED_SHORT_4_4_4_4 },
 211         { GL_RGB10_A2, GL_RGBA, GL_UNSIGNED_INT_2_10_10_10_REV },
 212         { GL_RGBA16F, GL_RGBA, GL_HALF_FLOAT },
 213         { GL_RGBA16F, GL_RGBA, GL_FLOAT },
 214         { GL_RGBA32F, GL_RGBA, GL_FLOAT },
 215         { GL_RGBA8UI, GL_RGBA_INTEGER, GL_UNSIGNED_BYTE },
 216         { GL_RGBA8I, GL_RGBA_INTEGER, GL_BYTE },
 217         { GL_RGB10_A2UI, GL_RGBA_INTEGER, GL_UNSIGNED_INT_2_10_10_10_REV },
 218         { GL_RGBA16UI, GL_RGBA_INTEGER, GL_UNSIGNED_SHORT },
 219         { GL_RGBA16I, GL_RGBA_INTEGER, GL_SHORT },
 220         { GL_RGBA32I, GL_RGBA_INTEGER, GL_INT },
 221         { GL_RGBA32UI, GL_RGBA_INTEGER, GL_UNSIGNED_INT },
 222         { GL_DEPTH_COMPONENT16, GL_DEPTH_COMPONENT, GL_UNSIGNED_SHORT },
 223         { GL_DEPTH_COMPONENT16, GL_DEPTH_COMPONENT, GL_UNSIGNED_INT },
 224         { GL_DEPTH_COMPONENT24, GL_DEPTH_COMPONENT, GL_UNSIGNED_INT },
 225         { GL_DEPTH_COMPONENT32F, GL_DEPTH_COMPONENT, GL_FLOAT },
 226         { GL_DEPTH24_STENCIL8, GL_DEPTH_STENCIL, GL_UNSIGNED_INT_24_8 },
 227         { GL_DEPTH32F_STENCIL8, GL_DEPTH_STENCIL,
 228           GL_FLOAT_32_UNSIGNED_INT_24_8_REV },
 229     };
 230
 231     for (size_t ii = 0; ii < arraysize(kSupportedFormatTypes); ++ii) {
 232       supported_combinations_.insert(kSupportedFormatTypes[ii]);
 233     }
 234   }
 235
 236   // This may be accessed from multiple threads.
 237   bool IsValid(GLenum internal_format, GLenum format, GLenum type) const {
 238     FormatType query = { internal_format, format, type };
 239     return supported_combinations_.find(query) != supported_combinations_.end();
 240   }
 241
 242  private:
 243   // TODO(zmo): once std::tuple is allowed, switch over to that.
 244   struct FormatType {
 245     GLenum internal_format;
 246     GLenum format;
 247     GLenum type;
 248   };
 249
 250   struct FormatTypeCompare {
 251     bool operator() (const FormatType& lhs, const FormatType& rhs) const {
 252       return (lhs.internal_format < rhs.internal_format ||
 253               ((lhs.internal_format == rhs.internal_format) &&
 254                (lhs.format < rhs.format)) ||
 255               ((lhs.internal_format == rhs.internal_format) &&
 256                (lhs.format == rhs.format) &&
 257                (lhs.type < rhs.type)));
 258     }
 259   };
 260
 261   // This class needs to be thread safe, so once supported_combinations_
 262   // are initialized in the constructor, it should never be modified later.
 263   std::set<FormatType, FormatTypeCompare> supported_combinations_;
 264 };
 265
 266 base::LazyInstance<const FormatTypeValidator>::Leaky g_format_type_validator =
 267     LAZY_INSTANCE_INITIALIZER;
 268
 269 }  // namespace anonymous
 270
 271 TextureManager::DestructionObserver::DestructionObserver() {}
 272
 273 TextureManager::DestructionObserver::~DestructionObserver() {}
 274
 275 TextureManager::~TextureManager() {
 276   for (unsigned int i = 0; i < destruction_observers_.size(); i++)
 277     destruction_observers_[i]->OnTextureManagerDestroying(this);
 278
 279   DCHECK(textures_.empty());
 280
 281   // If this triggers, that means something is keeping a reference to
 282   // a Texture belonging to this.
 283   CHECK_EQ(texture_count_, 0u);
 284
 285   DCHECK_EQ(0, num_unrenderable_textures_);
 286   DCHECK_EQ(0, num_unsafe_textures_);
 287   DCHECK_EQ(0, num_uncleared_mips_);
 288   DCHECK_EQ(0, num_images_);
 289
 290   base::trace_event::MemoryDumpManager::GetInstance()->UnregisterDumpProvider(
 291       this);
 292 }
 293
 294 void TextureManager::Destroy(bool have_context) {
 295   have_context_ = have_context;
 296   textures_.clear();
 297   for (int ii = 0; ii < kNumDefaultTextures; ++ii) {
 298     default_textures_[ii] = NULL;
 299   }
 300
 301   if (have_context) {
 302     glDeleteTextures(arraysize(black_texture_ids_), black_texture_ids_);
 303   }
 304
 305   DCHECK_EQ(0u, memory_tracker_managed_->GetMemRepresented());
 306   DCHECK_EQ(0u, memory_tracker_unmanaged_->GetMemRepresented());
 307 }
 308
 309 Texture::Texture(GLuint service_id)
 310     : mailbox_manager_(NULL),
 311       memory_tracking_ref_(NULL),
 312       service_id_(service_id),
 313       cleared_(true),
 314       num_uncleared_mips_(0),
 315       num_npot_faces_(0),
 316       target_(0),
 317       min_filter_(GL_NEAREST_MIPMAP_LINEAR),
 318       mag_filter_(GL_LINEAR),
 319       wrap_r_(GL_REPEAT),
 320       wrap_s_(GL_REPEAT),
 321       wrap_t_(GL_REPEAT),
 322       usage_(GL_NONE),
 323       pool_(GL_TEXTURE_POOL_UNMANAGED_CHROMIUM),
 324       compare_func_(GL_LEQUAL),
 325       compare_mode_(GL_NONE),
 326       max_lod_(1000.0f),
 327       min_lod_(-1000.0f),
 328       base_level_(0),
 329       max_level_(1000),
 330       max_level_set_(-1),
 331       texture_complete_(false),
 332       texture_mips_dirty_(false),
 333       texture_mips_complete_(false),
 334       cube_complete_(false),
 335       texture_level0_dirty_(false),
 336       texture_level0_complete_(false),
 337       npot_(false),
 338       has_been_bound_(false),
 339       framebuffer_attachment_count_(0),
 340       immutable_(false),
 341       has_images_(false),
 342       estimated_size_(0),
 343       can_render_condition_(CAN_RENDER_ALWAYS),
 344       texture_max_anisotropy_initialized_(false) {
 345 }
 346
 347 Texture::~Texture() {
 348   if (mailbox_manager_)
 349     mailbox_manager_->TextureDeleted(this);
 350 }
 351
 352 void Texture::AddTextureRef(TextureRef* ref) {
 353   DCHECK(refs_.find(ref) == refs_.end());
 354   refs_.insert(ref);
 355   if (!memory_tracking_ref_) {
 356     memory_tracking_ref_ = ref;
 357     GetMemTracker()->TrackMemAlloc(estimated_size());
 358   }
 359 }
 360
 361 void Texture::RemoveTextureRef(TextureRef* ref, bool have_context) {
 362   if (memory_tracking_ref_ == ref) {
 363     GetMemTracker()->TrackMemFree(estimated_size());
 364     memory_tracking_ref_ = NULL;
 365   }
 366   size_t result = refs_.erase(ref);
 367   DCHECK_EQ(result, 1u);
 368   if (refs_.empty()) {
 369     if (have_context) {
 370       GLuint id = service_id();
 371       glDeleteTextures(1, &id);
 372     }
 373     delete this;
 374   } else if (memory_tracking_ref_ == NULL) {
 375     // TODO(piman): tune ownership semantics for cross-context group shared
 376     // textures.
 377     memory_tracking_ref_ = *refs_.begin();
 378     GetMemTracker()->TrackMemAlloc(estimated_size());
 379   }
 380 }
 381
 382 MemoryTypeTracker* Texture::GetMemTracker() {
 383   DCHECK(memory_tracking_ref_);
 384   return memory_tracking_ref_->manager()->GetMemTracker(pool_);
 385 }
 386
 387 Texture::LevelInfo::LevelInfo()
 388     : target(0),
 389       level(-1),
 390       internal_format(0),
 391       width(0),
 392       height(0),
 393       depth(0),
 394       border(0),
 395       format(0),
 396       type(0),
 397       estimated_size(0) {
 398 }
 399
 400 Texture::LevelInfo::LevelInfo(const LevelInfo& rhs)
 401     : cleared_rect(rhs.cleared_rect),
 402       target(rhs.target),
 403       level(rhs.level),
 404       internal_format(rhs.internal_format),
 405       width(rhs.width),
 406       height(rhs.height),
 407       depth(rhs.depth),
 408       border(rhs.border),
 409       format(rhs.format),
 410       type(rhs.type),
 411       image(rhs.image),
 412       estimated_size(rhs.estimated_size) {
 413 }
 414
 415 Texture::LevelInfo::~LevelInfo() {
 416 }
 417
 418 Texture::FaceInfo::FaceInfo()
 419     : num_mip_levels(0) {
 420 }
 421
 422 Texture::FaceInfo::~FaceInfo() {
 423 }
 424
 425 Texture::CanRenderCondition Texture::GetCanRenderCondition() const {
 426   if (target_ == 0)
 427     return CAN_RENDER_ALWAYS;
 428
 429   if (target_ != GL_TEXTURE_EXTERNAL_OES) {
 430     if (face_infos_.empty()) {
 431       return CAN_RENDER_NEVER;
 432     }
 433
 434     const Texture::LevelInfo& first_face = face_infos_[0].level_infos[0];
 435     if (first_face.width == 0 ||
 436         first_face.height == 0 ||
 437         first_face.depth == 0) {
 438       return CAN_RENDER_NEVER;
 439     }
 440   }
 441
 442   bool needs_mips = NeedsMips();
 443   if (needs_mips) {
 444     if (!texture_complete())
 445       return CAN_RENDER_NEVER;
 446   }
 447
 448   if (target_ == GL_TEXTURE_CUBE_MAP && !cube_complete())
 449     return CAN_RENDER_NEVER;
 450
 451   bool is_npot_compatible = !needs_mips &&
 452       wrap_s_ == GL_CLAMP_TO_EDGE &&
 453       wrap_t_ == GL_CLAMP_TO_EDGE;
 454
 455   if (!is_npot_compatible) {
 456     if (target_ == GL_TEXTURE_RECTANGLE_ARB)
 457       return CAN_RENDER_NEVER;
 458     else if (npot())
 459       return CAN_RENDER_ONLY_IF_NPOT;
 460   }
 461
 462   return CAN_RENDER_ALWAYS;
 463 }
 464
 465 bool Texture::CanRender(const FeatureInfo* feature_info) const {
 466   switch (can_render_condition_) {
 467     case CAN_RENDER_ALWAYS:
 468       return true;
 469     case CAN_RENDER_NEVER:
 470       return false;
 471     case CAN_RENDER_ONLY_IF_NPOT:
 472       break;
 473   }
 474   return feature_info->feature_flags().npot_ok;
 475 }
 476
 477 void Texture::AddToSignature(
 478     const FeatureInfo* feature_info,
 479     GLenum target,
 480     GLint level,
 481     std::string* signature) const {
 482   DCHECK(feature_info);
 483   DCHECK(signature);
 484   DCHECK_GE(level, 0);
 485   size_t face_index = GLES2Util::GLTargetToFaceIndex(target);
 486   DCHECK_LT(static_cast<size_t>(face_index),
 487             face_infos_.size());
 488   DCHECK_LT(static_cast<size_t>(level),
 489             face_infos_[face_index].level_infos.size());
 490
 491   const Texture::LevelInfo& info =
 492       face_infos_[face_index].level_infos[level];
 493
 494   TextureSignature signature_data(target,
 495                                   level,
 496                                   min_filter_,
 497                                   mag_filter_,
 498                                   wrap_r_,
 499                                   wrap_s_,
 500                                   wrap_t_,
 501                                   usage_,
 502                                   info.internal_format,
 503                                   compare_func_,
 504                                   compare_mode_,
 505                                   info.width,
 506                                   info.height,
 507                                   info.depth,
 508                                   max_lod_,
 509                                   min_lod_,
 510                                   base_level_,
 511                                   info.border,
 512                                   max_level_,
 513                                   info.format,
 514                                   info.type,
 515                                   info.image.get() != NULL,
 516                                   CanRender(feature_info),
 517                                   CanRenderTo(),
 518                                   npot_);
 519
 520   signature->append(TextureTag, sizeof(TextureTag));
 521   signature->append(reinterpret_cast<const char*>(&signature_data),
 522                     sizeof(signature_data));
 523 }
 524
 525 void Texture::SetMailboxManager(MailboxManager* mailbox_manager) {
 526   DCHECK(!mailbox_manager_ || mailbox_manager_ == mailbox_manager);
 527   mailbox_manager_ = mailbox_manager;
 528 }
 529
 530 bool Texture::MarkMipmapsGenerated(
 531     const FeatureInfo* feature_info) {
 532   if (!CanGenerateMipmaps(feature_info)) {
 533     return false;
 534   }
 535   for (size_t ii = 0; ii < face_infos_.size(); ++ii) {
 536     const Texture::FaceInfo& face_info = face_infos_[ii];
 537     const Texture::LevelInfo& level0_info = face_info.level_infos[0];
 538     GLsizei width = level0_info.width;
 539     GLsizei height = level0_info.height;
 540     GLsizei depth = level0_info.depth;
 541     GLenum target = target_ == GL_TEXTURE_2D ? GL_TEXTURE_2D :
 542                                GLES2Util::IndexToGLFaceTarget(ii);
 543
 544     const GLsizei num_mips = face_info.num_mip_levels;
 545     for (GLsizei level = 1; level < num_mips; ++level) {
 546       width = std::max(1, width >> 1);
 547       height = std::max(1, height >> 1);
 548       depth = std::max(1, depth >> 1);
 549       SetLevelInfo(feature_info, target, level, level0_info.internal_format,
 550                    width, height, depth, level0_info.border, level0_info.format,
 551                    level0_info.type, gfx::Rect(width, height));
 552     }
 553   }
 554
 555   return true;
 556 }
 557
 558 void Texture::SetTarget(
 559     const FeatureInfo* feature_info, GLenum target, GLint max_levels) {
 560   DCHECK_EQ(0u, target_);  // you can only set this once.
 561   target_ = target;
 562   size_t num_faces = (target == GL_TEXTURE_CUBE_MAP) ? 6 : 1;
 563   face_infos_.resize(num_faces);
 564   for (size_t ii = 0; ii < num_faces; ++ii) {
 565     face_infos_[ii].level_infos.resize(max_levels);
 566   }
 567
 568   if (target == GL_TEXTURE_EXTERNAL_OES || target == GL_TEXTURE_RECTANGLE_ARB) {
 569     min_filter_ = GL_LINEAR;
 570     wrap_s_ = wrap_t_ = GL_CLAMP_TO_EDGE;
 571   }
 572
 573   if (target == GL_TEXTURE_EXTERNAL_OES) {
 574     immutable_ = true;
 575   }
 576   Update(feature_info);
 577   UpdateCanRenderCondition();
 578 }
 579
 580 bool Texture::CanGenerateMipmaps(
 581     const FeatureInfo* feature_info) const {
 582   if ((npot() && !feature_info->feature_flags().npot_ok) ||
 583       face_infos_.empty() ||
 584       target_ == GL_TEXTURE_EXTERNAL_OES ||
 585       target_ == GL_TEXTURE_RECTANGLE_ARB) {
 586     return false;
 587   }
 588
 589   // Can't generate mips for depth or stencil textures.
 590   const Texture::LevelInfo& first = face_infos_[0].level_infos[0];
 591   uint32 channels = GLES2Util::GetChannelsForFormat(first.format);
 592   if (channels & (GLES2Util::kDepth | GLES2Util::kStencil)) {
 593     return false;
 594   }
 595
 596   // TODO(gman): Check internal_format, format and type.
 597   for (size_t ii = 0; ii < face_infos_.size(); ++ii) {
 598     const LevelInfo& info = face_infos_[ii].level_infos[0];
 599     if ((info.target == 0) || (info.width != first.width) ||
 600         (info.height != first.height) || (info.depth != 1) ||
 601         (info.format != first.format) ||
 602         (info.internal_format != first.internal_format) ||
 603         (info.type != first.type) ||
 604         feature_info->validators()->compressed_texture_format.IsValid(
 605             info.internal_format) ||
 606         info.image.get()) {
 607       return false;
 608     }
 609   }
 610   return true;
 611 }
 612
 613 bool Texture::TextureIsNPOT(GLsizei width,
 614                             GLsizei height,
 615                             GLsizei depth) {
 616   return (GLES2Util::IsNPOT(width) ||
 617           GLES2Util::IsNPOT(height) ||
 618           GLES2Util::IsNPOT(depth));
 619 }
 620
 621 bool Texture::TextureFaceComplete(const Texture::LevelInfo& first_face,
 622                                   size_t face_index,
 623                                   GLenum target,
 624                                   GLenum internal_format,
 625                                   GLsizei width,
 626                                   GLsizei height,
 627                                   GLsizei depth,
 628                                   GLenum format,
 629                                   GLenum type) {
 630   bool complete = (target != 0 && depth == 1);
 631   if (face_index != 0) {
 632     complete &= (width == first_face.width &&
 633                  height == first_face.height &&
 634                  internal_format == first_face.internal_format &&
 635                  format == first_face.format &&
 636                  type == first_face.type);
 637   }
 638   return complete;
 639 }
 640
 641 bool Texture::TextureMipComplete(const Texture::LevelInfo& level0_face,
 642                                  GLenum target,
 643                                  GLint level,
 644                                  GLenum internal_format,
 645                                  GLsizei width,
 646                                  GLsizei height,
 647                                  GLsizei depth,
 648                                  GLenum format,
 649                                  GLenum type) {
 650   bool complete = (target != 0);
 651   if (level != 0) {
 652     const GLsizei mip_width = std::max(1, level0_face.width >> level);
 653     const GLsizei mip_height = std::max(1, level0_face.height >> level);
 654     const GLsizei mip_depth = std::max(1, level0_face.depth >> level);
 655
 656     complete &= (width == mip_width &&
 657                  height == mip_height &&
 658                  depth == mip_depth &&
 659                  internal_format == level0_face.internal_format &&
 660                  format == level0_face.format &&
 661                  type == level0_face.type);
 662   }
 663   return complete;
 664 }
 665
 666 void Texture::SetLevelClearedRect(GLenum target,
 667                                   GLint level,
 668                                   const gfx::Rect& cleared_rect) {
 669   DCHECK_GE(level, 0);
 670   size_t face_index = GLES2Util::GLTargetToFaceIndex(target);
 671   DCHECK_LT(static_cast<size_t>(face_index),
 672             face_infos_.size());
 673   DCHECK_LT(static_cast<size_t>(level),
 674             face_infos_[face_index].level_infos.size());
 675   Texture::LevelInfo& info =
 676       face_infos_[face_index].level_infos[level];
 677   UpdateMipCleared(&info, info.width, info.height, cleared_rect);
 678   UpdateCleared();
 679 }
 680
 681 void Texture::SetLevelCleared(GLenum target, GLint level, bool cleared) {
 682   DCHECK_GE(level, 0);
 683   size_t face_index = GLES2Util::GLTargetToFaceIndex(target);
 684   DCHECK_LT(static_cast<size_t>(face_index), face_infos_.size());
 685   DCHECK_LT(static_cast<size_t>(level),
 686             face_infos_[face_index].level_infos.size());
 687   Texture::LevelInfo& info = face_infos_[face_index].level_infos[level];
 688   UpdateMipCleared(&info, info.width, info.height,
 689                    cleared ? gfx::Rect(info.width, info.height) : gfx::Rect());
 690   UpdateCleared();
 691 }
 692
 693 void Texture::UpdateCleared() {
 694   if (face_infos_.empty()) {
 695     return;
 696   }
 697
 698   const bool cleared = (num_uncleared_mips_ == 0);
 699
 700   // If texture is uncleared and is attached to a framebuffer,
 701   // that framebuffer must be marked possibly incomplete.
 702   if (!cleared && IsAttachedToFramebuffer()) {
 703     IncAllFramebufferStateChangeCount();
 704   }
 705
 706   UpdateSafeToRenderFrom(cleared);
 707 }
 708
 709 void Texture::UpdateSafeToRenderFrom(bool cleared) {
 710   if (cleared_ == cleared)
 711     return;
 712   cleared_ = cleared;
 713   int delta = cleared ? -1 : +1;
 714   for (RefSet::iterator it = refs_.begin(); it != refs_.end(); ++it)
 715     (*it)->manager()->UpdateSafeToRenderFrom(delta);
 716 }
 717
 718 void Texture::UpdateMipCleared(LevelInfo* info,
 719                                GLsizei width,
 720                                GLsizei height,
 721                                const gfx::Rect& cleared_rect) {
 722   bool was_cleared = info->cleared_rect == gfx::Rect(info->width, info->height);
 723   info->width = width;
 724   info->height = height;
 725   info->cleared_rect = cleared_rect;
 726   bool cleared = info->cleared_rect == gfx::Rect(info->width, info->height);
 727   if (cleared == was_cleared)
 728     return;
 729   int delta = cleared ? -1 : +1;
 730   num_uncleared_mips_ += delta;
 731   for (RefSet::iterator it = refs_.begin(); it != refs_.end(); ++it)
 732     (*it)->manager()->UpdateUnclearedMips(delta);
 733 }
 734
 735 void Texture::UpdateCanRenderCondition() {
 736   CanRenderCondition can_render_condition = GetCanRenderCondition();
 737   if (can_render_condition_ == can_render_condition)
 738     return;
 739   for (RefSet::iterator it = refs_.begin(); it != refs_.end(); ++it)
 740     (*it)->manager()->UpdateCanRenderCondition(can_render_condition_,
 741                                                can_render_condition);
 742   can_render_condition_ = can_render_condition;
 743 }
 744
 745 void Texture::UpdateHasImages() {
 746   if (face_infos_.empty())
 747     return;
 748
 749   bool has_images = false;
 750   for (size_t ii = 0; ii < face_infos_.size(); ++ii) {
 751     for (size_t jj = 0; jj < face_infos_[ii].level_infos.size(); ++jj) {
 752       const Texture::LevelInfo& info = face_infos_[ii].level_infos[jj];
 753       if (info.image.get() != NULL) {
 754         has_images = true;
 755         break;
 756       }
 757     }
 758   }
 759
 760   if (has_images_ == has_images)
 761     return;
 762   has_images_ = has_images;
 763   int delta = has_images ? +1 : -1;
 764   for (RefSet::iterator it = refs_.begin(); it != refs_.end(); ++it)
 765     (*it)->manager()->UpdateNumImages(delta);
 766 }
 767
 768 void Texture::IncAllFramebufferStateChangeCount() {
 769   for (RefSet::iterator it = refs_.begin(); it != refs_.end(); ++it)
 770     (*it)->manager()->IncFramebufferStateChangeCount();
 771 }
 772
 773 void Texture::SetLevelInfo(const FeatureInfo* feature_info,
 774                            GLenum target,
 775                            GLint level,
 776                            GLenum internal_format,
 777                            GLsizei width,
 778                            GLsizei height,
 779                            GLsizei depth,
 780                            GLint border,
 781                            GLenum format,
 782                            GLenum type,
 783                            const gfx::Rect& cleared_rect) {
 784   DCHECK_GE(level, 0);
 785   size_t face_index = GLES2Util::GLTargetToFaceIndex(target);
 786   DCHECK_LT(static_cast<size_t>(face_index),
 787             face_infos_.size());
 788   DCHECK_LT(static_cast<size_t>(level),
 789             face_infos_[face_index].level_infos.size());
 790   DCHECK_GE(width, 0);
 791   DCHECK_GE(height, 0);
 792   DCHECK_GE(depth, 0);
 793   Texture::LevelInfo& info =
 794       face_infos_[face_index].level_infos[level];
 795
 796   // Update counters only if any attributes have changed. Counters are
 797   // comparisons between the old and new values so it must be done before any
 798   // assignment has been done to the LevelInfo.
 799   if (info.target != target ||
 800       info.internal_format != internal_format ||
 801       info.width != width ||
 802       info.height != height ||
 803       info.depth != depth ||
 804       info.format != format ||
 805       info.type != type) {
 806     if (level == 0) {
 807       // Calculate the mip level count.
 808       face_infos_[face_index].num_mip_levels =
 809         TextureManager::ComputeMipMapCount(target_, width, height, depth);
 810
 811       // Update NPOT face count for the first level.
 812       bool prev_npot = TextureIsNPOT(info.width, info.height, info.depth);
 813       bool now_npot = TextureIsNPOT(width, height, depth);
 814       if (prev_npot != now_npot)
 815         num_npot_faces_ += now_npot ? 1 : -1;
 816
 817       // Signify that level 0 has been changed, so they need to be reverified.
 818       texture_level0_dirty_ = true;
 819     }
 820
 821     // Signify that at least one of the mips has changed.
 822     texture_mips_dirty_ = true;
 823   }
 824
 825   info.target = target;
 826   info.level = level;
 827   info.internal_format = internal_format;
 828   info.depth = depth;
 829   info.border = border;
 830   info.format = format;
 831   info.type = type;
 832   info.image = 0;
 833
 834   UpdateMipCleared(&info, width, height, cleared_rect);
 835
 836   estimated_size_ -= info.estimated_size;
 837   GLES2Util::ComputeImageDataSizes(
 838       width, height, 1, format, type, 4, &info.estimated_size, NULL, NULL);
 839   estimated_size_ += info.estimated_size;
 840
 841   max_level_set_ = std::max(max_level_set_, level);
 842   Update(feature_info);
 843   UpdateCleared();
 844   UpdateCanRenderCondition();
 845   UpdateHasImages();
 846   if (IsAttachedToFramebuffer()) {
 847     // TODO(gman): If textures tracked which framebuffers they were attached to
 848     // we could just mark those framebuffers as not complete.
 849     IncAllFramebufferStateChangeCount();
 850   }
 851 }
 852
 853 bool Texture::ValidForTexture(
 854     GLint target,
 855     GLint level,
 856     GLint xoffset,
 857     GLint yoffset,
 858     GLint zoffset,
 859     GLsizei width,
 860     GLsizei height,
 861     GLsizei depth,
 862     GLenum type) const {
 863   size_t face_index = GLES2Util::GLTargetToFaceIndex(target);
 864   if (level >= 0 && face_index < face_infos_.size() &&
 865       static_cast<size_t>(level) < face_infos_[face_index].level_infos.size()) {
 866     const LevelInfo& info = face_infos_[face_index].level_infos[level];
 867     int32 max_x;
 868     int32 max_y;
 869     int32 max_z;
 870     return SafeAddInt32(xoffset, width, &max_x) &&
 871            SafeAddInt32(yoffset, height, &max_y) &&
 872            SafeAddInt32(zoffset, depth, &max_z) &&
 873            xoffset >= 0 &&
 874            yoffset >= 0 &&
 875            zoffset >= 0 &&
 876            max_x <= info.width &&
 877            max_y <= info.height &&
 878            max_z <= info.depth &&
 879            type == info.type;
 880   }
 881   return false;
 882 }
 883
 884 bool Texture::GetLevelSize(
 885     GLint target, GLint level,
 886     GLsizei* width, GLsizei* height, GLsizei* depth) const {
 887   DCHECK(width);
 888   DCHECK(height);
 889   size_t face_index = GLES2Util::GLTargetToFaceIndex(target);
 890   if (level >= 0 && face_index < face_infos_.size() &&
 891       static_cast<size_t>(level) < face_infos_[face_index].level_infos.size()) {
 892     const LevelInfo& info = face_infos_[face_index].level_infos[level];
 893     if (info.target != 0) {
 894       *width = info.width;
 895       *height = info.height;
 896       if (depth)
 897         *depth = info.depth;
 898       return true;
 899     }
 900   }
 901   return false;
 902 }
 903
 904 bool Texture::GetLevelType(
 905     GLint target, GLint level, GLenum* type, GLenum* internal_format) const {
 906   DCHECK(type);
 907   DCHECK(internal_format);
 908   size_t face_index = GLES2Util::GLTargetToFaceIndex(target);
 909   if (level >= 0 && face_index < face_infos_.size() &&
 910       static_cast<size_t>(level) < face_infos_[face_index].level_infos.size()) {
 911     const LevelInfo& info = face_infos_[face_index].level_infos[level];
 912     if (info.target != 0) {
 913       *type = info.type;
 914       *internal_format = info.internal_format;
 915       return true;
 916     }
 917   }
 918   return false;
 919 }
 920
 921 GLenum Texture::SetParameteri(
 922     const FeatureInfo* feature_info, GLenum pname, GLint param) {
 923   DCHECK(feature_info);
 924
 925   if (target_ == GL_TEXTURE_EXTERNAL_OES ||
 926       target_ == GL_TEXTURE_RECTANGLE_ARB) {
 927     if (pname == GL_TEXTURE_MIN_FILTER &&
 928         (param != GL_NEAREST && param != GL_LINEAR))
 929       return GL_INVALID_ENUM;
 930     if ((pname == GL_TEXTURE_WRAP_S || pname == GL_TEXTURE_WRAP_T) &&
 931         param != GL_CLAMP_TO_EDGE)
 932       return GL_INVALID_ENUM;
 933   }
 934
 935   switch (pname) {
 936     case GL_TEXTURE_MIN_LOD:
 937     case GL_TEXTURE_MAX_LOD:
 938       {
 939         GLfloat fparam = static_cast<GLfloat>(param);
 940         return SetParameterf(feature_info, pname, fparam);
 941       }
 942     case GL_TEXTURE_MIN_FILTER:
 943       if (!feature_info->validators()->texture_min_filter_mode.IsValid(param)) {
 944         return GL_INVALID_ENUM;
 945       }
 946       min_filter_ = param;
 947       break;
 948     case GL_TEXTURE_MAG_FILTER:
 949       if (!feature_info->validators()->texture_mag_filter_mode.IsValid(param)) {
 950         return GL_INVALID_ENUM;
 951       }
 952       mag_filter_ = param;
 953       break;
 954     case GL_TEXTURE_POOL_CHROMIUM:
 955       if (!feature_info->validators()->texture_pool.IsValid(param)) {
 956         return GL_INVALID_ENUM;
 957       }
 958       GetMemTracker()->TrackMemFree(estimated_size());
 959       pool_ = param;
 960       GetMemTracker()->TrackMemAlloc(estimated_size());
 961       break;
 962     case GL_TEXTURE_WRAP_R:
 963       if (!feature_info->validators()->texture_wrap_mode.IsValid(param)) {
 964         return GL_INVALID_ENUM;
 965       }
 966       wrap_r_ = param;
 967       break;
 968     case GL_TEXTURE_WRAP_S:
 969       if (!feature_info->validators()->texture_wrap_mode.IsValid(param)) {
 970         return GL_INVALID_ENUM;
 971       }
 972       wrap_s_ = param;
 973       break;
 974     case GL_TEXTURE_WRAP_T:
 975       if (!feature_info->validators()->texture_wrap_mode.IsValid(param)) {
 976         return GL_INVALID_ENUM;
 977       }
 978       wrap_t_ = param;
 979       break;
 980     case GL_TEXTURE_COMPARE_FUNC:
 981       if (!feature_info->validators()->texture_compare_func.IsValid(param)) {
 982         return GL_INVALID_ENUM;
 983       }
 984       compare_func_ = param;
 985       break;
 986     case GL_TEXTURE_COMPARE_MODE:
 987       if (!feature_info->validators()->texture_compare_mode.IsValid(param)) {
 988         return GL_INVALID_ENUM;
 989       }
 990       compare_mode_ = param;
 991       break;
 992     case GL_TEXTURE_BASE_LEVEL:
 993       if (param < 0) {
 994         return GL_INVALID_VALUE;
 995       }
 996       base_level_ = param;
 997       break;
 998     case GL_TEXTURE_MAX_LEVEL:
 999       if (param < 0) {
1000         return GL_INVALID_VALUE;
1001       }
1002       max_level_ = param;
1003       break;
1004     case GL_TEXTURE_MAX_ANISOTROPY_EXT:
1005       if (param < 1) {
1006         return GL_INVALID_VALUE;
1007       }
1008       break;
1009     case GL_TEXTURE_USAGE_ANGLE:
1010       if (!feature_info->validators()->texture_usage.IsValid(param)) {
1011         return GL_INVALID_ENUM;
1012       }
1013       usage_ = param;
1014       break;
1015     default:
1016       NOTREACHED();
1017       return GL_INVALID_ENUM;
1018   }
1019   Update(feature_info);
1020   UpdateCleared();
1021   UpdateCanRenderCondition();
1022   return GL_NO_ERROR;
1023 }
1024
1025 GLenum Texture::SetParameterf(
1026     const FeatureInfo* feature_info, GLenum pname, GLfloat param) {
1027   switch (pname) {
1028     case GL_TEXTURE_MIN_FILTER:
1029     case GL_TEXTURE_MAG_FILTER:
1030     case GL_TEXTURE_POOL_CHROMIUM:
1031     case GL_TEXTURE_WRAP_R:
1032     case GL_TEXTURE_WRAP_S:
1033     case GL_TEXTURE_WRAP_T:
1034     case GL_TEXTURE_COMPARE_FUNC:
1035     case GL_TEXTURE_COMPARE_MODE:
1036     case GL_TEXTURE_BASE_LEVEL:
1037     case GL_TEXTURE_MAX_LEVEL:
1038     case GL_TEXTURE_USAGE_ANGLE:
1039       {
1040         GLint iparam = static_cast<GLint>(param);
1041         return SetParameteri(feature_info, pname, iparam);
1042       }
1043     case GL_TEXTURE_MIN_LOD:
1044       min_lod_ = param;
1045       break;
1046     case GL_TEXTURE_MAX_LOD:
1047       max_lod_ = param;
1048       break;
1049     case GL_TEXTURE_MAX_ANISOTROPY_EXT:
1050       if (param < 1.f) {
1051         return GL_INVALID_VALUE;
1052       }
1053       break;
1054     default:
1055       NOTREACHED();
1056       return GL_INVALID_ENUM;
1057   }
1058   return GL_NO_ERROR;
1059 }
1060
1061 void Texture::Update(const FeatureInfo* feature_info) {
1062   // Update npot status.
1063   // Assume GL_TEXTURE_EXTERNAL_OES textures are npot, all others
1064   npot_ = (target_ == GL_TEXTURE_EXTERNAL_OES) || (num_npot_faces_ > 0);
1065
1066   if (face_infos_.empty()) {
1067     texture_complete_ = false;
1068     cube_complete_ = false;
1069     return;
1070   }
1071
1072   // Update texture_complete and cube_complete status.
1073   const Texture::FaceInfo& first_face = face_infos_[0];
1074   const Texture::LevelInfo& first_level = first_face.level_infos[0];
1075   const GLsizei levels_needed = first_face.num_mip_levels;
1076
1077   texture_complete_ =
1078       max_level_set_ >= (levels_needed - 1) && max_level_set_ >= 0;
1079   cube_complete_ = (face_infos_.size() == 6) &&
1080                    (first_level.width == first_level.height);
1081
1082   if (first_level.width == 0 || first_level.height == 0) {
1083     texture_complete_ = false;
1084   } else if (first_level.type == GL_FLOAT &&
1085       !feature_info->feature_flags().enable_texture_float_linear &&
1086       (min_filter_ != GL_NEAREST_MIPMAP_NEAREST ||
1087        mag_filter_ != GL_NEAREST)) {
1088     texture_complete_ = false;
1089   } else if (first_level.type == GL_HALF_FLOAT_OES &&
1090              !feature_info->feature_flags().enable_texture_half_float_linear &&
1091              (min_filter_ != GL_NEAREST_MIPMAP_NEAREST ||
1092               mag_filter_ != GL_NEAREST)) {
1093     texture_complete_ = false;
1094   }
1095
1096   if (cube_complete_ && texture_level0_dirty_) {
1097     texture_level0_complete_ = true;
1098     for (size_t ii = 0; ii < face_infos_.size(); ++ii) {
1099       const Texture::LevelInfo& level0 = face_infos_[ii].level_infos[0];
1100       if (!TextureFaceComplete(first_level,
1101                                ii,
1102                                level0.target,
1103                                level0.internal_format,
1104                                level0.width,
1105                                level0.height,
1106                                level0.depth,
1107                                level0.format,
1108                                level0.type)) {
1109         texture_level0_complete_ = false;
1110         break;
1111       }
1112     }
1113     texture_level0_dirty_ = false;
1114   }
1115   cube_complete_ &= texture_level0_complete_;
1116
1117   if (texture_complete_ && texture_mips_dirty_) {
1118     texture_mips_complete_ = true;
1119     for (size_t ii = 0;
1120          ii < face_infos_.size() && texture_mips_complete_;
1121          ++ii) {
1122       const Texture::FaceInfo& face_info = face_infos_[ii];
1123       const Texture::LevelInfo& level0 = face_info.level_infos[0];
1124       for (GLsizei jj = 1; jj < levels_needed; ++jj) {
1125         const Texture::LevelInfo& level_info = face_infos_[ii].level_infos[jj];
1126         if (!TextureMipComplete(level0,
1127                                 level_info.target,
1128                                 jj,
1129                                 level_info.internal_format,
1130                                 level_info.width,
1131                                 level_info.height,
1132                                 level_info.depth,
1133                                 level_info.format,
1134                                 level_info.type)) {
1135           texture_mips_complete_ = false;
1136           break;
1137         }
1138       }
1139     }
1140     texture_mips_dirty_ = false;
1141   }
1142   texture_complete_ &= texture_mips_complete_;
1143 }
1144
1145 bool Texture::ClearRenderableLevels(GLES2Decoder* decoder) {
1146   DCHECK(decoder);
1147   if (cleared_) {
1148     return true;
1149   }
1150
1151   for (size_t ii = 0; ii < face_infos_.size(); ++ii) {
1152     const Texture::FaceInfo& face_info = face_infos_[ii];
1153     for (GLint jj = 0; jj < face_info.num_mip_levels; ++jj) {
1154       const Texture::LevelInfo& info = face_info.level_infos[jj];
1155       if (info.target != 0) {
1156         if (!ClearLevel(decoder, info.target, jj)) {
1157           return false;
1158         }
1159       }
1160     }
1161   }
1162   UpdateSafeToRenderFrom(true);
1163   return true;
1164 }
1165
1166 gfx::Rect Texture::GetLevelClearedRect(GLenum target, GLint level) const {
1167   size_t face_index = GLES2Util::GLTargetToFaceIndex(target);
1168   if (face_index >= face_infos_.size() ||
1169       level >= static_cast<GLint>(face_infos_[face_index].level_infos.size())) {
1170     return gfx::Rect();
1171   }
1172
1173   const Texture::LevelInfo& info = face_infos_[face_index].level_infos[level];
1174
1175   return info.cleared_rect;
1176 }
1177
1178 bool Texture::IsLevelCleared(GLenum target, GLint level) const {
1179   size_t face_index = GLES2Util::GLTargetToFaceIndex(target);
1180   if (face_index >= face_infos_.size() ||
1181       level >= static_cast<GLint>(face_infos_[face_index].level_infos.size())) {
1182     return true;
1183   }
1184
1185   const Texture::LevelInfo& info = face_infos_[face_index].level_infos[level];
1186
1187   return info.cleared_rect == gfx::Rect(info.width, info.height);
1188 }
1189
1190 void Texture::InitTextureMaxAnisotropyIfNeeded(GLenum target) {
1191   if (texture_max_anisotropy_initialized_)
1192     return;
1193   texture_max_anisotropy_initialized_ = true;
1194   GLfloat params[] = { 1.0f };
1195   glTexParameterfv(target, GL_TEXTURE_MAX_ANISOTROPY_EXT, params);
1196 }
1197
1198 bool Texture::ClearLevel(
1199     GLES2Decoder* decoder, GLenum target, GLint level) {
1200   DCHECK(decoder);
1201   size_t face_index = GLES2Util::GLTargetToFaceIndex(target);
1202   if (face_index >= face_infos_.size() ||
1203       level >= static_cast<GLint>(face_infos_[face_index].level_infos.size())) {
1204     return true;
1205   }
1206
1207   Texture::LevelInfo& info = face_infos_[face_index].level_infos[level];
1208
1209   DCHECK(target == info.target);
1210
1211   if (info.target == 0 ||
1212       info.cleared_rect == gfx::Rect(info.width, info.height) ||
1213       info.width == 0 || info.height == 0 || info.depth == 0) {
1214     return true;
1215   }
1216
1217   // Clear all remaining sub regions.
1218   const int x[] = {
1219       0, info.cleared_rect.x(), info.cleared_rect.right(), info.width};
1220   const int y[] = {
1221       0, info.cleared_rect.y(), info.cleared_rect.bottom(), info.height};
1222
1223   for (size_t j = 0; j < 3; ++j) {
1224     for (size_t i = 0; i < 3; ++i) {
1225       // Center of nine patch is already cleared.
1226       if (j == 1 && i == 1)
1227         continue;
1228
1229       gfx::Rect rect(x[i], y[j], x[i + 1] - x[i], y[j + 1] - y[j]);
1230       if (rect.IsEmpty())
1231         continue;
1232
1233       // NOTE: It seems kind of gross to call back into the decoder for this
1234       // but only the decoder knows all the state (like unpack_alignment_)
1235       // that's needed to be able to call GL correctly.
1236       bool cleared = decoder->ClearLevel(this, info.target, info.level,
1237                                          info.format, info.type, rect.x(),
1238                                          rect.y(), rect.width(), rect.height());
1239       if (!cleared)
1240         return false;
1241     }
1242   }
1243
1244   UpdateMipCleared(&info, info.width, info.height,
1245                    gfx::Rect(info.width, info.height));
1246   return true;
1247 }
1248
1249 void Texture::SetLevelImage(
1250     const FeatureInfo* feature_info,
1251     GLenum target,
1252     GLint level,
1253     gfx::GLImage* image) {
1254   DCHECK_GE(level, 0);
1255   size_t face_index = GLES2Util::GLTargetToFaceIndex(target);
1256   DCHECK_LT(static_cast<size_t>(face_index),
1257             face_infos_.size());
1258   DCHECK_LT(static_cast<size_t>(level),
1259             face_infos_[face_index].level_infos.size());
1260   Texture::LevelInfo& info =
1261       face_infos_[face_index].level_infos[level];
1262   DCHECK_EQ(info.target, target);
1263   DCHECK_EQ(info.level, level);
1264   info.image = image;
1265   UpdateCanRenderCondition();
1266   UpdateHasImages();
1267 }
1268
1269 gfx::GLImage* Texture::GetLevelImage(GLint target, GLint level) const {
1270   if (target != GL_TEXTURE_2D && target != GL_TEXTURE_EXTERNAL_OES &&
1271       target != GL_TEXTURE_RECTANGLE_ARB) {
1272     return NULL;
1273   }
1274
1275   size_t face_index = GLES2Util::GLTargetToFaceIndex(target);
1276   if (level >= 0 && face_index < face_infos_.size() &&
1277       static_cast<size_t>(level) < face_infos_[face_index].level_infos.size()) {
1278     const LevelInfo& info = face_infos_[face_index].level_infos[level];
1279     if (info.target != 0) {
1280       return info.image.get();
1281     }
1282   }
1283   return NULL;
1284 }
1285
1286 void Texture::OnWillModifyPixels() {
1287   gfx::GLImage* image = GetLevelImage(target(), 0);
1288   if (image)
1289     image->WillModifyTexImage();
1290 }
1291
1292 void Texture::OnDidModifyPixels() {
1293   gfx::GLImage* image = GetLevelImage(target(), 0);
1294   if (image)
1295     image->DidModifyTexImage();
1296 }
1297
1298 void Texture::DumpLevelMemory(base::trace_event::ProcessMemoryDump* pmd,
1299                               uint64_t client_tracing_id,
1300                               const std::string& dump_name) const {
1301   for (uint32_t face_index = 0; face_index < face_infos_.size(); ++face_index) {
1302     const auto& level_infos = face_infos_[face_index].level_infos;
1303     for (uint32_t level_index = 0; level_index < level_infos.size();
1304          ++level_index) {
1305       // Skip levels with no size. Textures will have empty levels for all
1306       // potential mip levels which are not in use.
1307       if (!level_infos[level_index].estimated_size)
1308         continue;
1309
1310       if (level_infos[level_index].image) {
1311         // If a level is backed by a GLImage, ask the GLImage to dump itself.
1312         level_infos[level_index].image->OnMemoryDump(
1313             pmd, client_tracing_id,
1314             base::StringPrintf("%s/face_%d/level_%d", dump_name.c_str(),
1315                                face_index, level_index));
1316       } else {
1317         // If a level is not backed by a GLImage, create a simple dump.
1318         base::trace_event::MemoryAllocatorDump* dump = pmd->CreateAllocatorDump(
1319             base::StringPrintf("%s/face_%d/level_%d", dump_name.c_str(),
1320                                face_index, level_index));
1321         dump->AddScalar(
1322             base::trace_event::MemoryAllocatorDump::kNameSize,
1323             base::trace_event::MemoryAllocatorDump::kUnitsBytes,
1324             static_cast<uint64_t>(level_infos[level_index].estimated_size));
1325       }
1326     }
1327   }
1328 }
1329
1330 TextureRef::TextureRef(TextureManager* manager,
1331                        GLuint client_id,
1332                        Texture* texture)
1333     : manager_(manager),
1334       texture_(texture),
1335       client_id_(client_id),
1336       num_observers_(0) {
1337   DCHECK(manager_);
1338   DCHECK(texture_);
1339   texture_->AddTextureRef(this);
1340   manager_->StartTracking(this);
1341 }
1342
1343 scoped_refptr<TextureRef> TextureRef::Create(TextureManager* manager,
1344                                              GLuint client_id,
1345                                              GLuint service_id) {
1346   return new TextureRef(manager, client_id, new Texture(service_id));
1347 }
1348
1349 TextureRef::~TextureRef() {
1350   manager_->StopTracking(this);
1351   texture_->RemoveTextureRef(this, manager_->have_context_);
1352   manager_ = NULL;
1353 }
1354
1355 TextureManager::TextureManager(MemoryTracker* memory_tracker,
1356                                FeatureInfo* feature_info,
1357                                GLint max_texture_size,
1358                                GLint max_cube_map_texture_size,
1359                                GLint max_rectangle_texture_size,
1360                                GLint max_3d_texture_size,
1361                                bool use_default_textures)
1362     : memory_tracker_managed_(
1363           new MemoryTypeTracker(memory_tracker, MemoryTracker::kManaged)),
1364       memory_tracker_unmanaged_(
1365           new MemoryTypeTracker(memory_tracker, MemoryTracker::kUnmanaged)),
1366       memory_tracker_(memory_tracker),
1367       feature_info_(feature_info),
1368       framebuffer_manager_(NULL),
1369       max_texture_size_(max_texture_size),
1370       max_cube_map_texture_size_(max_cube_map_texture_size),
1371       max_rectangle_texture_size_(max_rectangle_texture_size),
1372       max_3d_texture_size_(max_3d_texture_size),
1373       max_levels_(ComputeMipMapCount(GL_TEXTURE_2D,
1374                                      max_texture_size,
1375                                      max_texture_size,
1376                                      max_texture_size)),
1377       max_cube_map_levels_(ComputeMipMapCount(GL_TEXTURE_CUBE_MAP,
1378                                               max_cube_map_texture_size,
1379                                               max_cube_map_texture_size,
1380                                               max_cube_map_texture_size)),
1381       max_3d_levels_(ComputeMipMapCount(GL_TEXTURE_3D,
1382                                         // Same as GL_TEXTURE_2D_ARRAY
1383                                         max_3d_texture_size,
1384                                         max_3d_texture_size,
1385                                         max_3d_texture_size)),
1386       use_default_textures_(use_default_textures),
1387       num_unrenderable_textures_(0),
1388       num_unsafe_textures_(0),
1389       num_uncleared_mips_(0),
1390       num_images_(0),
1391       texture_count_(0),
1392       have_context_(true) {
1393   for (int ii = 0; ii < kNumDefaultTextures; ++ii) {
1394     black_texture_ids_[ii] = 0;
1395   }
1396 }
1397
1398 bool TextureManager::Initialize() {
1399   // TODO(gman): The default textures have to be real textures, not the 0
1400   // texture because we simulate non shared resources on top of shared
1401   // resources and all contexts that share resource share the same default
1402   // texture.
1403   default_textures_[kTexture2D] = CreateDefaultAndBlackTextures(
1404       GL_TEXTURE_2D, &black_texture_ids_[kTexture2D]);
1405   default_textures_[kCubeMap] = CreateDefaultAndBlackTextures(
1406       GL_TEXTURE_CUBE_MAP, &black_texture_ids_[kCubeMap]);
1407
1408   if (feature_info_->feature_flags().oes_egl_image_external) {
1409     default_textures_[kExternalOES] = CreateDefaultAndBlackTextures(
1410         GL_TEXTURE_EXTERNAL_OES, &black_texture_ids_[kExternalOES]);
1411   }
1412
1413   if (feature_info_->feature_flags().arb_texture_rectangle) {
1414     default_textures_[kRectangleARB] = CreateDefaultAndBlackTextures(
1415         GL_TEXTURE_RECTANGLE_ARB, &black_texture_ids_[kRectangleARB]);
1416   }
1417
1418   // When created from InProcessCommandBuffer, we won't have a |memory_tracker_|
1419   // so don't register a dump provider.
1420   if (memory_tracker_) {
1421     base::trace_event::MemoryDumpManager::GetInstance()->RegisterDumpProvider(
1422         this, base::ThreadTaskRunnerHandle::Get());
1423   }
1424
1425   return true;
1426 }
1427
1428 scoped_refptr<TextureRef>
1429     TextureManager::CreateDefaultAndBlackTextures(
1430         GLenum target,
1431         GLuint* black_texture) {
1432   static uint8 black[] = {0, 0, 0, 255};
1433
1434   // Sampling a texture not associated with any EGLImage sibling will return
1435   // black values according to the spec.
1436   bool needs_initialization = (target != GL_TEXTURE_EXTERNAL_OES);
1437   bool needs_faces = (target == GL_TEXTURE_CUBE_MAP);
1438
1439   // Make default textures and texture for replacing non-renderable textures.
1440   GLuint ids[2];
1441   const int num_ids = use_default_textures_ ? 2 : 1;
1442   glGenTextures(num_ids, ids);
1443   for (int ii = 0; ii < num_ids; ++ii) {
1444     glBindTexture(target, ids[ii]);
1445     if (needs_initialization) {
1446       if (needs_faces) {
1447         for (int jj = 0; jj < GLES2Util::kNumFaces; ++jj) {
1448           glTexImage2D(GLES2Util::IndexToGLFaceTarget(jj), 0, GL_RGBA, 1, 1, 0,
1449                        GL_RGBA, GL_UNSIGNED_BYTE, black);
1450         }
1451       } else {
1452         glTexImage2D(target, 0, GL_RGBA, 1, 1, 0, GL_RGBA,
1453                      GL_UNSIGNED_BYTE, black);
1454       }
1455     }
1456   }
1457   glBindTexture(target, 0);
1458
1459   scoped_refptr<TextureRef> default_texture;
1460   if (use_default_textures_) {
1461     default_texture = TextureRef::Create(this, 0, ids[1]);
1462     SetTarget(default_texture.get(), target);
1463     if (needs_faces) {
1464       for (int ii = 0; ii < GLES2Util::kNumFaces; ++ii) {
1465         SetLevelInfo(default_texture.get(), GLES2Util::IndexToGLFaceTarget(ii),
1466                      0, GL_RGBA, 1, 1, 1, 0, GL_RGBA, GL_UNSIGNED_BYTE,
1467                      gfx::Rect(1, 1));
1468       }
1469     } else {
1470       if (needs_initialization) {
1471         SetLevelInfo(default_texture.get(), GL_TEXTURE_2D, 0, GL_RGBA, 1, 1, 1,
1472                      0, GL_RGBA, GL_UNSIGNED_BYTE, gfx::Rect(1, 1));
1473       } else {
1474         SetLevelInfo(default_texture.get(), GL_TEXTURE_EXTERNAL_OES, 0, GL_RGBA,
1475                      1, 1, 1, 0, GL_RGBA, GL_UNSIGNED_BYTE, gfx::Rect(1, 1));
1476       }
1477     }
1478   }
1479
1480   *black_texture = ids[0];
1481   return default_texture;
1482 }
1483
1484 bool TextureManager::ValidForTarget(
1485     GLenum target, GLint level, GLsizei width, GLsizei height, GLsizei depth) {
1486   GLsizei max_size = MaxSizeForTarget(target) >> level;
1487   return level >= 0 &&
1488          width >= 0 &&
1489          height >= 0 &&
1490          depth >= 0 &&
1491          level < MaxLevelsForTarget(target) &&
1492          width <= max_size &&
1493          height <= max_size &&
1494          depth <= max_size &&
1495          (level == 0 || feature_info_->feature_flags().npot_ok ||
1496           (!GLES2Util::IsNPOT(width) &&
1497            !GLES2Util::IsNPOT(height) &&
1498            !GLES2Util::IsNPOT(depth))) &&
1499          (target != GL_TEXTURE_CUBE_MAP || (width == height && depth == 1)) &&
1500          (target != GL_TEXTURE_2D || (depth == 1));
1501 }
1502
1503 void TextureManager::SetTarget(TextureRef* ref, GLenum target) {
1504   DCHECK(ref);
1505   ref->texture()
1506       ->SetTarget(feature_info_.get(), target, MaxLevelsForTarget(target));
1507 }
1508
1509 void TextureManager::SetLevelClearedRect(TextureRef* ref,
1510                                          GLenum target,
1511                                          GLint level,
1512                                          const gfx::Rect& cleared_rect) {
1513   DCHECK(ref);
1514   ref->texture()->SetLevelClearedRect(target, level, cleared_rect);
1515 }
1516
1517 void TextureManager::SetLevelCleared(TextureRef* ref,
1518                                      GLenum target,
1519                                      GLint level,
1520                                      bool cleared) {
1521   DCHECK(ref);
1522   ref->texture()->SetLevelCleared(target, level, cleared);
1523 }
1524
1525 bool TextureManager::ClearRenderableLevels(
1526     GLES2Decoder* decoder, TextureRef* ref) {
1527   DCHECK(ref);
1528   return ref->texture()->ClearRenderableLevels(decoder);
1529 }
1530
1531 bool TextureManager::ClearTextureLevel(
1532     GLES2Decoder* decoder, TextureRef* ref,
1533     GLenum target, GLint level) {
1534   DCHECK(ref);
1535   Texture* texture = ref->texture();
1536   if (texture->num_uncleared_mips() == 0) {
1537     return true;
1538   }
1539   bool result = texture->ClearLevel(decoder, target, level);
1540   texture->UpdateCleared();
1541   return result;
1542 }
1543
1544 void TextureManager::SetLevelInfo(TextureRef* ref,
1545                                   GLenum target,
1546                                   GLint level,
1547                                   GLenum internal_format,
1548                                   GLsizei width,
1549                                   GLsizei height,
1550                                   GLsizei depth,
1551                                   GLint border,
1552                                   GLenum format,
1553                                   GLenum type,
1554                                   const gfx::Rect& cleared_rect) {
1555   DCHECK(gfx::Rect(width, height).Contains(cleared_rect));
1556   DCHECK(ref);
1557   Texture* texture = ref->texture();
1558
1559   texture->GetMemTracker()->TrackMemFree(texture->estimated_size());
1560   texture->SetLevelInfo(feature_info_.get(), target, level, internal_format,
1561                         width, height, depth, border, format, type,
1562                         cleared_rect);
1563   texture->GetMemTracker()->TrackMemAlloc(texture->estimated_size());
1564 }
1565
1566 Texture* TextureManager::Produce(TextureRef* ref) {
1567   DCHECK(ref);
1568   return ref->texture();
1569 }
1570
1571 TextureRef* TextureManager::Consume(
1572     GLuint client_id,
1573     Texture* texture) {
1574   DCHECK(client_id);
1575   scoped_refptr<TextureRef> ref(new TextureRef(this, client_id, texture));
1576   bool result = textures_.insert(std::make_pair(client_id, ref)).second;
1577   DCHECK(result);
1578   return ref.get();
1579 }
1580
1581 void TextureManager::SetParameteri(
1582     const char* function_name, ErrorState* error_state,
1583     TextureRef* ref, GLenum pname, GLint param) {
1584   DCHECK(error_state);
1585   DCHECK(ref);
1586   Texture* texture = ref->texture();
1587   GLenum result = texture->SetParameteri(feature_info_.get(), pname, param);
1588   if (result != GL_NO_ERROR) {
1589     if (result == GL_INVALID_ENUM) {
1590       ERRORSTATE_SET_GL_ERROR_INVALID_ENUM(
1591           error_state, function_name, param, "param");
1592     } else {
1593       ERRORSTATE_SET_GL_ERROR_INVALID_PARAMI(
1594           error_state, result, function_name, pname, param);
1595     }
1596   } else {
1597     // Texture tracking pools exist only for the command decoder, so
1598     // do not pass them on to the native GL implementation.
1599     if (pname != GL_TEXTURE_POOL_CHROMIUM) {
1600       glTexParameteri(texture->target(), pname, param);
1601     }
1602   }
1603 }
1604
1605 void TextureManager::SetParameterf(
1606     const char* function_name, ErrorState* error_state,
1607     TextureRef* ref, GLenum pname, GLfloat param) {
1608   DCHECK(error_state);
1609   DCHECK(ref);
1610   Texture* texture = ref->texture();
1611   GLenum result = texture->SetParameterf(feature_info_.get(), pname, param);
1612   if (result != GL_NO_ERROR) {
1613     if (result == GL_INVALID_ENUM) {
1614       ERRORSTATE_SET_GL_ERROR_INVALID_ENUM(
1615           error_state, function_name, pname, "pname");
1616     } else {
1617       ERRORSTATE_SET_GL_ERROR_INVALID_PARAMF(
1618           error_state, result, function_name, pname, param);
1619     }
1620   } else {
1621     // Texture tracking pools exist only for the command decoder, so
1622     // do not pass them on to the native GL implementation.
1623     if (pname != GL_TEXTURE_POOL_CHROMIUM) {
1624       glTexParameterf(texture->target(), pname, param);
1625     }
1626   }
1627 }
1628
1629 bool TextureManager::MarkMipmapsGenerated(TextureRef* ref) {
1630   DCHECK(ref);
1631   Texture* texture = ref->texture();
1632   texture->GetMemTracker()->TrackMemFree(texture->estimated_size());
1633   bool result = texture->MarkMipmapsGenerated(feature_info_.get());
1634   texture->GetMemTracker()->TrackMemAlloc(texture->estimated_size());
1635   return result;
1636 }
1637
1638 TextureRef* TextureManager::CreateTexture(
1639     GLuint client_id, GLuint service_id) {
1640   DCHECK_NE(0u, service_id);
1641   scoped_refptr<TextureRef> ref(TextureRef::Create(
1642       this, client_id, service_id));
1643   std::pair<TextureMap::iterator, bool> result =
1644       textures_.insert(std::make_pair(client_id, ref));
1645   DCHECK(result.second);
1646   return ref.get();
1647 }
1648
1649 TextureRef* TextureManager::GetTexture(
1650     GLuint client_id) const {
1651   TextureMap::const_iterator it = textures_.find(client_id);
1652   return it != textures_.end() ? it->second.get() : NULL;
1653 }
1654
1655 void TextureManager::RemoveTexture(GLuint client_id) {
1656   TextureMap::iterator it = textures_.find(client_id);
1657   if (it != textures_.end()) {
1658     it->second->reset_client_id();
1659     textures_.erase(it);
1660   }
1661 }
1662
1663 void TextureManager::StartTracking(TextureRef* ref) {
1664   Texture* texture = ref->texture();
1665   ++texture_count_;
1666   num_uncleared_mips_ += texture->num_uncleared_mips();
1667   if (!texture->SafeToRenderFrom())
1668     ++num_unsafe_textures_;
1669   if (!texture->CanRender(feature_info_.get()))
1670     ++num_unrenderable_textures_;
1671   if (texture->HasImages())
1672     ++num_images_;
1673 }
1674
1675 void TextureManager::StopTracking(TextureRef* ref) {
1676   if (ref->num_observers()) {
1677     for (unsigned int i = 0; i < destruction_observers_.size(); i++) {
1678       destruction_observers_[i]->OnTextureRefDestroying(ref);
1679     }
1680     DCHECK_EQ(ref->num_observers(), 0);
1681   }
1682
1683   Texture* texture = ref->texture();
1684
1685   --texture_count_;
1686   if (texture->HasImages()) {
1687     DCHECK_NE(0, num_images_);
1688     --num_images_;
1689   }
1690   if (!texture->CanRender(feature_info_.get())) {
1691     DCHECK_NE(0, num_unrenderable_textures_);
1692     --num_unrenderable_textures_;
1693   }
1694   if (!texture->SafeToRenderFrom()) {
1695     DCHECK_NE(0, num_unsafe_textures_);
1696     --num_unsafe_textures_;
1697   }
1698   num_uncleared_mips_ -= texture->num_uncleared_mips();
1699   DCHECK_GE(num_uncleared_mips_, 0);
1700 }
1701
1702 MemoryTypeTracker* TextureManager::GetMemTracker(GLenum tracking_pool) {
1703   switch (tracking_pool) {
1704     case GL_TEXTURE_POOL_MANAGED_CHROMIUM:
1705       return memory_tracker_managed_.get();
1706       break;
1707     case GL_TEXTURE_POOL_UNMANAGED_CHROMIUM:
1708       return memory_tracker_unmanaged_.get();
1709       break;
1710     default:
1711       break;
1712   }
1713   NOTREACHED();
1714   return NULL;
1715 }
1716
1717 Texture* TextureManager::GetTextureForServiceId(GLuint service_id) const {
1718   // This doesn't need to be fast. It's only used during slow queries.
1719   for (TextureMap::const_iterator it = textures_.begin();
1720        it != textures_.end(); ++it) {
1721     Texture* texture = it->second->texture();
1722     if (texture->service_id() == service_id)
1723       return texture;
1724   }
1725   return NULL;
1726 }
1727
1728 GLsizei TextureManager::ComputeMipMapCount(GLenum target,
1729                                            GLsizei width,
1730                                            GLsizei height,
1731                                            GLsizei depth) {
1732   switch (target) {
1733     case GL_TEXTURE_EXTERNAL_OES:
1734       return 1;
1735     default:
1736       return 1 +
1737              base::bits::Log2Floor(std::max(std::max(width, height), depth));
1738   }
1739 }
1740
1741 void TextureManager::SetLevelImage(
1742     TextureRef* ref,
1743     GLenum target,
1744     GLint level,
1745     gfx::GLImage* image) {
1746   DCHECK(ref);
1747   ref->texture()->SetLevelImage(feature_info_.get(), target, level, image);
1748 }
1749
1750 size_t TextureManager::GetSignatureSize() const {
1751   return sizeof(TextureTag) + sizeof(TextureSignature);
1752 }
1753
1754 void TextureManager::AddToSignature(
1755     TextureRef* ref,
1756     GLenum target,
1757     GLint level,
1758     std::string* signature) const {
1759   ref->texture()->AddToSignature(feature_info_.get(), target, level, signature);
1760 }
1761
1762 void TextureManager::UpdateSafeToRenderFrom(int delta) {
1763   num_unsafe_textures_ += delta;
1764   DCHECK_GE(num_unsafe_textures_, 0);
1765 }
1766
1767 void TextureManager::UpdateUnclearedMips(int delta) {
1768   num_uncleared_mips_ += delta;
1769   DCHECK_GE(num_uncleared_mips_, 0);
1770 }
1771
1772 void TextureManager::UpdateCanRenderCondition(
1773     Texture::CanRenderCondition old_condition,
1774     Texture::CanRenderCondition new_condition) {
1775   if (old_condition == Texture::CAN_RENDER_NEVER ||
1776       (old_condition == Texture::CAN_RENDER_ONLY_IF_NPOT &&
1777        !feature_info_->feature_flags().npot_ok)) {
1778     DCHECK_GT(num_unrenderable_textures_, 0);
1779     --num_unrenderable_textures_;
1780   }
1781   if (new_condition == Texture::CAN_RENDER_NEVER ||
1782       (new_condition == Texture::CAN_RENDER_ONLY_IF_NPOT &&
1783        !feature_info_->feature_flags().npot_ok))
1784     ++num_unrenderable_textures_;
1785 }
1786
1787 void TextureManager::UpdateNumImages(int delta) {
1788   num_images_ += delta;
1789   DCHECK_GE(num_images_, 0);
1790 }
1791
1792 void TextureManager::IncFramebufferStateChangeCount() {
1793   if (framebuffer_manager_)
1794     framebuffer_manager_->IncFramebufferStateChangeCount();
1795 }
1796
1797 bool TextureManager::ValidateFormatAndTypeCombination(
1798     ErrorState* error_state, const char* function_name, GLenum format,
1799     GLenum type) {
1800   // TODO(zmo): now this is only called by GLES2DecoderImpl::DoCopyTexImage2D
1801   // and is incorrect for ES3. Fix this.
1802   if (!g_format_type_validator.Get().IsValid(format, format, type)) {
1803     ERRORSTATE_SET_GL_ERROR(
1804         error_state, GL_INVALID_OPERATION, function_name,
1805         (std::string("invalid type ") +
1806          GLES2Util::GetStringEnum(type) + " for format " +
1807          GLES2Util::GetStringEnum(format)).c_str());
1808     return false;
1809   }
1810   return true;
1811 }
1812
1813 bool TextureManager::ValidateTextureParameters(
1814     ErrorState* error_state, const char* function_name,
1815     GLenum format, GLenum type, GLenum internal_format, GLint level) {
1816   const Validators* validators = feature_info_->validators();
1817   if (!validators->texture_format.IsValid(format)) {
1818     ERRORSTATE_SET_GL_ERROR_INVALID_ENUM(
1819         error_state, function_name, format, "format");
1820     return false;
1821   }
1822   if (!validators->pixel_type.IsValid(type)) {
1823     ERRORSTATE_SET_GL_ERROR_INVALID_ENUM(
1824         error_state, function_name, type, "type");
1825     return false;
1826   }
1827   if (!g_format_type_validator.Get().IsValid(internal_format, format, type)) {
1828     ERRORSTATE_SET_GL_ERROR(
1829         error_state, GL_INVALID_OPERATION, function_name,
1830         "invalid internalformat/format/type combination");
1831     return false;
1832   }
1833   // For TexSubImage calls, internal_format isn't part of the parameters,
1834   // so its validation needs to be after the internal_format/format/type
1835   // combination validation. Otherwise, an unexpected INVALID_ENUM could be
1836   // generated instead of INVALID_OPERATION.
1837   if (!validators->texture_internal_format.IsValid(internal_format)) {
1838     ERRORSTATE_SET_GL_ERROR_INVALID_ENUM(
1839         error_state, function_name, internal_format, "internal_format");
1840     return false;
1841   }
1842   if (!feature_info_->IsES3Enabled()) {
1843     uint32 channels = GLES2Util::GetChannelsForFormat(format);
1844     if ((channels & (GLES2Util::kDepth | GLES2Util::kStencil)) != 0 && level) {
1845       ERRORSTATE_SET_GL_ERROR(
1846           error_state, GL_INVALID_OPERATION, function_name,
1847           (std::string("invalid format ") + GLES2Util::GetStringEnum(format) +
1848            " for level != 0").c_str());
1849       return false;
1850     }
1851   }
1852   return true;
1853 }
1854
1855 // Gets the texture id for a given target.
1856 TextureRef* TextureManager::GetTextureInfoForTarget(
1857     ContextState* state, GLenum target) {
1858   TextureUnit& unit = state->texture_units[state->active_texture_unit];
1859   TextureRef* texture = NULL;
1860   switch (target) {
1861     case GL_TEXTURE_2D:
1862       texture = unit.bound_texture_2d.get();
1863       break;
1864     case GL_TEXTURE_CUBE_MAP:
1865     case GL_TEXTURE_CUBE_MAP_POSITIVE_X:
1866     case GL_TEXTURE_CUBE_MAP_NEGATIVE_X:
1867     case GL_TEXTURE_CUBE_MAP_POSITIVE_Y:
1868     case GL_TEXTURE_CUBE_MAP_NEGATIVE_Y:
1869     case GL_TEXTURE_CUBE_MAP_POSITIVE_Z:
1870     case GL_TEXTURE_CUBE_MAP_NEGATIVE_Z:
1871       texture = unit.bound_texture_cube_map.get();
1872       break;
1873     case GL_TEXTURE_EXTERNAL_OES:
1874       texture = unit.bound_texture_external_oes.get();
1875       break;
1876     case GL_TEXTURE_RECTANGLE_ARB:
1877       texture = unit.bound_texture_rectangle_arb.get();
1878       break;
1879     case GL_TEXTURE_3D:
1880       texture = unit.bound_texture_3d.get();
1881       break;
1882     case GL_TEXTURE_2D_ARRAY:
1883       texture = unit.bound_texture_2d_array.get();
1884       break;
1885     default:
1886       NOTREACHED();
1887       return NULL;
1888   }
1889   return texture;
1890 }
1891
1892 TextureRef* TextureManager::GetTextureInfoForTargetUnlessDefault(
1893     ContextState* state, GLenum target) {
1894   TextureRef* texture = GetTextureInfoForTarget(state, target);
1895   if (!texture)
1896     return NULL;
1897   if (texture == GetDefaultTextureInfo(target))
1898     return NULL;
1899   return texture;
1900 }
1901
1902 bool TextureManager::ValidateTexImage(
1903     ContextState* state,
1904     const char* function_name,
1905     const DoTexImageArguments& args,
1906     TextureRef** texture_ref) {
1907   ErrorState* error_state = state->GetErrorState();
1908   const Validators* validators = feature_info_->validators();
1909   if (((args.command_type == DoTexImageArguments::kTexImage2D) &&
1910        !validators->texture_target.IsValid(args.target)) ||
1911       ((args.command_type == DoTexImageArguments::kTexImage3D) &&
1912        !validators->texture_3_d_target.IsValid(args.target))) {
1913     ERRORSTATE_SET_GL_ERROR_INVALID_ENUM(
1914         error_state, function_name, args.target, "target");
1915     return false;
1916   }
1917   if (!ValidateTextureParameters(
1918       error_state, function_name, args.format, args.type,
1919       args.internal_format, args.level)) {
1920     return false;
1921   }
1922   if (!ValidForTarget(args.target, args.level,
1923                       args.width, args.height, args.depth) ||
1924       args.border != 0) {
1925     ERRORSTATE_SET_GL_ERROR(
1926         error_state, GL_INVALID_VALUE, function_name,
1927         "dimensions out of range");
1928     return false;
1929   }
1930   if ((GLES2Util::GetChannelsForFormat(args.format) &
1931        (GLES2Util::kDepth | GLES2Util::kStencil)) != 0 && args.pixels
1932       && !feature_info_->IsES3Enabled()) {
1933     ERRORSTATE_SET_GL_ERROR(
1934         error_state, GL_INVALID_OPERATION,
1935         function_name, "can not supply data for depth or stencil textures");
1936     return false;
1937   }
1938
1939   TextureRef* local_texture_ref = GetTextureInfoForTarget(state, args.target);
1940   if (!local_texture_ref) {
1941     ERRORSTATE_SET_GL_ERROR(
1942         error_state, GL_INVALID_OPERATION, function_name,
1943         "unknown texture for target");
1944     return false;
1945   }
1946   if (local_texture_ref->texture()->IsImmutable()) {
1947     ERRORSTATE_SET_GL_ERROR(
1948         error_state, GL_INVALID_OPERATION, function_name,
1949         "texture is immutable");
1950     return false;
1951   }
1952
1953   if (!memory_tracker_managed_->EnsureGPUMemoryAvailable(args.pixels_size)) {
1954     ERRORSTATE_SET_GL_ERROR(error_state, GL_OUT_OF_MEMORY, function_name,
1955                             "out of memory");
1956     return false;
1957   }
1958
1959   // Write the TextureReference since this is valid.
1960   *texture_ref = local_texture_ref;
1961   return true;
1962 }
1963
1964 void TextureManager::ValidateAndDoTexImage(
1965     DecoderTextureState* texture_state,
1966     ContextState* state,
1967     DecoderFramebufferState* framebuffer_state,
1968     const char* function_name,
1969     const DoTexImageArguments& args) {
1970   TextureRef* texture_ref;
1971   if (!ValidateTexImage(state, function_name, args, &texture_ref)) {
1972     return;
1973   }
1974
1975   DoTexImage(texture_state, state->GetErrorState(), framebuffer_state,
1976              function_name, texture_ref, args);
1977 }
1978
1979 GLenum TextureManager::AdjustTexFormat(GLenum format) const {
1980   // TODO(bajones): GLES 3 allows for internal format and format to differ.
1981   // This logic may need to change as a result.
1982   if (gfx::GetGLImplementation() == gfx::kGLImplementationDesktopGL) {
1983     if (format == GL_SRGB_EXT)
1984       return GL_RGB;
1985     if (format == GL_SRGB_ALPHA_EXT)
1986       return GL_RGBA;
1987   }
1988   return format;
1989 }
1990
1991 void TextureManager::DoTexImage(
1992     DecoderTextureState* texture_state,
1993     ErrorState* error_state,
1994     DecoderFramebufferState* framebuffer_state,
1995     const char* function_name,
1996     TextureRef* texture_ref,
1997     const DoTexImageArguments& args) {
1998   Texture* texture = texture_ref->texture();
1999   GLsizei tex_width = 0;
2000   GLsizei tex_height = 0;
2001   GLsizei tex_depth = 0;
2002   GLenum tex_type = 0;
2003   GLenum tex_format = 0;
2004   bool level_is_same =
2005       texture->GetLevelSize(
2006           args.target, args.level, &tex_width, &tex_height, &tex_depth) &&
2007       texture->GetLevelType(args.target, args.level, &tex_type, &tex_format) &&
2008       args.width == tex_width && args.height == tex_height &&
2009       args.depth == tex_depth && args.type == tex_type &&
2010       args.format == tex_format;
2011
2012   if (level_is_same && !args.pixels) {
2013     // Just set the level texture but mark the texture as uncleared.
2014     SetLevelInfo(texture_ref, args.target, args.level, args.internal_format,
2015                  args.width, args.height, args.depth, args.border, args.format,
2016                  args.type, gfx::Rect());
2017     texture_state->tex_image_failed = false;
2018     return;
2019   }
2020
2021   if (texture->IsAttachedToFramebuffer()) {
2022     framebuffer_state->clear_state_dirty = true;
2023   }
2024
2025   if (texture_state->texsubimage_faster_than_teximage &&
2026       level_is_same && args.pixels) {
2027     {
2028       ScopedTextureUploadTimer timer(texture_state);
2029       if (args.command_type == DoTexImageArguments::kTexImage3D) {
2030         glTexSubImage3D(args.target, args.level, 0, 0, 0,
2031                         args.width, args.height, args.depth,
2032                         args.format, args.type, args.pixels);
2033       } else {
2034         glTexSubImage2D(args.target, args.level, 0, 0, args.width, args.height,
2035                         AdjustTexFormat(args.format), args.type, args.pixels);
2036       }
2037     }
2038     SetLevelCleared(texture_ref, args.target, args.level, true);
2039     texture_state->tex_image_failed = false;
2040     return;
2041   }
2042
2043   ERRORSTATE_COPY_REAL_GL_ERRORS_TO_WRAPPER(error_state, function_name);
2044   {
2045     ScopedTextureUploadTimer timer(texture_state);
2046     if (args.command_type == DoTexImageArguments::kTexImage3D) {
2047       glTexImage3D(args.target, args.level, args.internal_format, args.width,
2048                    args.height, args.depth, args.border, args.format,
2049                    args.type, args.pixels);
2050     } else {
2051       glTexImage2D(args.target, args.level, args.internal_format, args.width,
2052                    args.height, args.border, AdjustTexFormat(args.format),
2053                    args.type, args.pixels);
2054     }
2055   }
2056   GLenum error = ERRORSTATE_PEEK_GL_ERROR(error_state, function_name);
2057   if (error == GL_NO_ERROR) {
2058     SetLevelInfo(
2059         texture_ref, args.target, args.level, args.internal_format, args.width,
2060         args.height, args.depth, args.border, args.format, args.type,
2061         args.pixels != NULL ? gfx::Rect(args.width, args.height) : gfx::Rect());
2062     texture_state->tex_image_failed = false;
2063   }
2064 }
2065
2066 ScopedTextureUploadTimer::ScopedTextureUploadTimer(
2067     DecoderTextureState* texture_state)
2068     : texture_state_(texture_state),
2069       begin_time_(base::TimeTicks::Now()) {
2070 }
2071
2072 ScopedTextureUploadTimer::~ScopedTextureUploadTimer() {
2073   texture_state_->texture_upload_count++;
2074   texture_state_->total_texture_upload_time +=
2075       base::TimeTicks::Now() - begin_time_;
2076 }
2077
2078 bool TextureManager::OnMemoryDump(const base::trace_event::MemoryDumpArgs& args,
2079                                   base::trace_event::ProcessMemoryDump* pmd) {
2080   for (const auto& resource : textures_) {
2081     // Only dump memory info for textures actually owned by this TextureManager.
2082     DumpTextureRef(pmd, resource.second.get());
2083   }
2084
2085   // Also dump TextureManager internal textures, if allocated.
2086   for (int i = 0; i < kNumDefaultTextures; i++) {
2087     if (default_textures_[i]) {
2088       DumpTextureRef(pmd, default_textures_[i].get());
2089     }
2090   }
2091
2092   return true;
2093 }
2094
2095 void TextureManager::DumpTextureRef(base::trace_event::ProcessMemoryDump* pmd,
2096                                     TextureRef* ref) {
2097   uint32_t size = ref->texture()->estimated_size();
2098
2099   // Ignore unallocated texture IDs.
2100   if (size == 0)
2101     return;
2102
2103   std::string dump_name =
2104       base::StringPrintf("gl/client_%d/textures/texture_%d",
2105                          memory_tracker_->ClientId(), ref->client_id());
2106
2107   base::trace_event::MemoryAllocatorDump* dump =
2108       pmd->CreateAllocatorDump(dump_name);
2109   dump->AddScalar(base::trace_event::MemoryAllocatorDump::kNameSize,
2110                   base::trace_event::MemoryAllocatorDump::kUnitsBytes,
2111                   static_cast<uint64_t>(size));
2112
2113   // Add the |client_guid| which expresses shared ownership with the client
2114   // process.
2115   auto client_guid = gfx::GetGLTextureGUIDForTracing(
2116       memory_tracker_->ClientTracingId(), ref->client_id());
2117   pmd->CreateSharedGlobalAllocatorDump(client_guid);
2118   pmd->AddOwnershipEdge(dump->guid(), client_guid);
2119
2120   // Add a |service_guid| which expresses shared ownership between the various
2121   // |client_guid|s.
2122   // TODO(ericrk): May need to ensure uniqueness using GLShareGroup and
2123   // potentially cross-share-group sharing via EGLImages. crbug.com/512534
2124   auto service_guid =
2125       gfx::GetGLTextureGUIDForTracing(0, ref->texture()->service_id());
2126   pmd->CreateSharedGlobalAllocatorDump(service_guid);
2127
2128   int importance = 0;  // Default importance.
2129   // The link to the memory tracking |client_id| is given a higher importance
2130   // than other refs.
2131   if (ref == ref->texture()->memory_tracking_ref_)
2132     importance = 2;
2133
2134   pmd->AddOwnershipEdge(client_guid, service_guid, importance);
2135
2136   // Dump all sub-levels held by the texture. They will appear below the main
2137   // gl/textures/client_X/texture_Y dump.
2138   ref->texture()->DumpLevelMemory(pmd, memory_tracker_->ClientTracingId(),
2139                                   dump_name);
2140 }
2141
2142 }  // namespace gles2
2143 }  // namespace gpu