Cache OpenGL program info on the client side of the command buffer.

gpu/command_buffer/client/program_info_manager.cc

+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "../client/program_info_manager.h"
+#include "../client/gles2_implementation.h"
+
+#include <map>
+
+namespace gpu {
+namespace gles2 {
+
+class NonCachedProgramInfoManager : public ProgramInfoManager {
+ public:
+  NonCachedProgramInfoManager();
+  virtual ~NonCachedProgramInfoManager();
+
+  virtual void CreateInfo(GLuint program);
+
+  virtual void DeleteInfo(GLuint program);
+
+  virtual bool GetProgramiv(
+      GLES2Implementation* gl, GLuint program, GLenum pname, GLint* params);
+
+  virtual GLint GetAttribLocation(
+      GLES2Implementation* gl, GLuint program, const char* name);
+
+  virtual GLint GetUniformLocation(
+      GLES2Implementation* gl, GLuint program, const char* name);
+
+  virtual bool GetActiveAttrib(
+      GLES2Implementation* gl,
+      GLuint program, GLuint index, GLsizei bufsize, GLsizei* length,
+      GLint* size, GLenum* type, char* name);
+
+  virtual bool GetActiveUniform(
+      GLES2Implementation* gl,
+      GLuint program, GLuint index, GLsizei bufsize, GLsizei* length,
+      GLint* size, GLenum* type, char* name);
+
+};
+
+NonCachedProgramInfoManager::NonCachedProgramInfoManager() {
+}
+
+NonCachedProgramInfoManager::~NonCachedProgramInfoManager() {
+}
+
+void NonCachedProgramInfoManager::CreateInfo(GLuint /* program */) {
+}
+
+void NonCachedProgramInfoManager::DeleteInfo(GLuint /* program */) {
+}
+
+bool NonCachedProgramInfoManager::GetProgramiv(
+    GLES2Implementation* /* gl */,
+    GLuint /* program */,
+    GLenum /* pname */,
+    GLint* /* params */) {
+  return false;
+}
+
+GLint NonCachedProgramInfoManager::GetAttribLocation(
+    GLES2Implementation* gl, GLuint program, const char* name) {
+  return gl->GetAttribLocationHelper(program, name);
+}
+
+GLint NonCachedProgramInfoManager::GetUniformLocation(
+    GLES2Implementation* gl, GLuint program, const char* name) {
+  return gl->GetUniformLocationHelper(program, name);
+}
+
+bool NonCachedProgramInfoManager::GetActiveAttrib(
+    GLES2Implementation* gl,
+    GLuint program, GLuint index, GLsizei bufsize, GLsizei* length,
+    GLint* size, GLenum* type, char* name) {
+  return gl->GetActiveAttribHelper(
+      program, index, bufsize, length, size, type, name);
+}
+
+bool NonCachedProgramInfoManager::GetActiveUniform(
+    GLES2Implementation* gl,
+    GLuint program, GLuint index, GLsizei bufsize, GLsizei* length,
+    GLint* size, GLenum* type, char* name) {
+  return gl->GetActiveUniformHelper(
+      program, index, bufsize, length, size, type, name);
+}
+
+class CachedProgramInfoManager : public ProgramInfoManager {
+ public:
+  CachedProgramInfoManager();
+  virtual ~CachedProgramInfoManager();
+
+  virtual void CreateInfo(GLuint program);
+
+  virtual void DeleteInfo(GLuint program);
+
+  virtual bool GetProgramiv(
+      GLES2Implementation* gl,
+      GLuint program, GLenum pname, GLint* params);
+
+  virtual GLint GetAttribLocation(
+      GLES2Implementation* gl, GLuint program, const char* name);
+
+  virtual GLint GetUniformLocation(
+      GLES2Implementation* gl, GLuint program, const char* name);
+
+  virtual bool GetActiveAttrib(
+      GLES2Implementation* gl,
+      GLuint program, GLuint index, GLsizei bufsize, GLsizei* length,
+      GLint* size, GLenum* type, char* name);
+
+  virtual bool GetActiveUniform(
+      GLES2Implementation* gl,
+      GLuint program, GLuint index, GLsizei bufsize, GLsizei* length,
+      GLint* size, GLenum* type, char* name);
+
+ private:
+  class ProgramInfo {
+   public:
+    struct UniformInfo {
+      UniformInfo(GLsizei _size, GLenum _type, const std::string& _name);
+
+      GLsizei size;
+      GLenum type;
+      bool is_array;
+      std::string name;
+      std::vector<GLint> element_locations;
+    };
+    struct VertexAttribInfo {
+      VertexAttribInfo(GLsizei _size, GLenum _type, const std::string& _name,
+                       GLint _location)
+          : size(_size),
+            type(_type),
+            location(_location),
+            name(_name) {
+      }
+      GLsizei size;
+      GLenum type;
+      GLint location;
+      std::string name;
+    };
+
+    typedef std::vector<UniformInfo> UniformInfoVector;
+    typedef std::vector<VertexAttribInfo> AttribInfoVector;
+
+    ProgramInfo();
+
+    const AttribInfoVector& GetAttribInfos() const {
+      return attrib_infos_;
+    }
+
+    const VertexAttribInfo* GetAttribInfo(GLint index) const {
+      return (static_cast<size_t>(index) < attrib_infos_.size()) ?
+         &attrib_infos_[index] : NULL;
+    }
+
+    GLint GetAttribLocation(const std::string& name) const;
+
+    const UniformInfo* GetUniformInfo(GLint index) const {
+      return (static_cast<size_t>(index) < uniform_infos_.size()) ?
+         &uniform_infos_[index] : NULL;
+    }
+
+    // Gets the location of a uniform by name.
+    GLint GetUniformLocation(const std::string& name) const;
+
+    bool GetProgramiv(GLenum pname, GLint* params);
+
+    // Updates the program info after a successful link.
+    void Update(GLES2Implementation* gl, GLuint program);
+
+   private:
+    GLsizei max_attrib_name_length_;
+
+    // Attrib by index.
+    AttribInfoVector attrib_infos_;
+
+    GLsizei max_uniform_name_length_;
+
+    // Uniform info by index.
+    UniformInfoVector uniform_infos_;
+
+    // This is true if glLinkProgram was successful last time it was called.
+    bool link_status_;
+  };
+
+  ProgramInfo* GetProgramInfo(GLES2Implementation* gl, GLuint program);
+
+  // TODO(gman): Switch to a faster container.
+  typedef std::map<GLuint, ProgramInfo> ProgramInfoMap;
+
+  ProgramInfoMap program_infos_;
+};
+
+CachedProgramInfoManager::ProgramInfo::UniformInfo::UniformInfo(
+    GLsizei _size, GLenum _type, const std::string& _name)
+    : size(_size),
+      type(_type),
+      name(_name) {
+  is_array = (!name.empty() && name[name.size() - 1] == ']');
+  GPU_DCHECK((size < 2 || !is_array));
+}
+
+CachedProgramInfoManager::ProgramInfo::ProgramInfo()
+    : max_attrib_name_length_(0),
+      max_uniform_name_length_(0),
+      link_status_(false) {
+}
+
+// TODO(gman): Add a faster lookup.
+GLint CachedProgramInfoManager::ProgramInfo::GetAttribLocation(
+    const std::string& name) const {
+  for (GLuint ii = 0; ii < attrib_infos_.size(); ++ii) {
+    const VertexAttribInfo& info = attrib_infos_[ii];
+    if (info.name == name) {
+      return info.location;
+    }
+  }
+  return -1;
+}
+
+// TODO(gman): Add a faster lookup.
+GLint CachedProgramInfoManager::ProgramInfo::GetUniformLocation(
+    const std::string& name) const {
+  for (GLuint ii = 0; ii < uniform_infos_.size(); ++ii) {
+    const UniformInfo& info = uniform_infos_[ii];
+    if (info.name == name ||
+        (info.is_array &&
+         info.name.compare(0, info.name.size() - 3, name) == 0)) {
+      return info.element_locations[0];
+    } else if (info.is_array &&
+               name.size() >= 3 && name[name.size() - 1] == ']') {
+      // Look for an array specification.
+      size_t open_pos = name.find_last_of('[');
+      if (open_pos != std::string::npos &&
+          open_pos < name.size() - 2 &&
+          info.name.size() > open_pos &&
+          name.compare(0, open_pos, info.name, 0, open_pos) == 0) {
+        GLint index = 0;
+        size_t last = name.size() - 1;
+        bool bad = false;
+        for (size_t pos = open_pos + 1; pos < last; ++pos) {
+          int8 digit = name[pos] - '0';
+          if (digit < 0 || digit > 9) {
+            bad = true;
+            break;
+          }
+          index = index * 10 + digit;
+        }
+        if (!bad && index >= 0 && index < info.size) {
+          return info.element_locations[index];
+        }
+      }
+    }
+  }
+  return -1;
+}
+
+bool CachedProgramInfoManager::ProgramInfo::GetProgramiv(
+    GLenum pname, GLint* params) {
+  switch (pname) {
+    case GL_LINK_STATUS:
+      *params = link_status_;
+      return true;
+    case GL_ACTIVE_ATTRIBUTES:
+      *params = attrib_infos_.size();
+      return true;
+    case GL_ACTIVE_ATTRIBUTE_MAX_LENGTH:
+      *params = max_attrib_name_length_;
+      return true;
+    case GL_ACTIVE_UNIFORMS:
+      *params = uniform_infos_.size();
+      return true;
+    case GL_ACTIVE_UNIFORM_MAX_LENGTH:
+      *params = max_uniform_name_length_;
+      return true;
+    default:
+      break;
+  }
+  return false;
+}
+
+template<typename T> static T LocalGetAs(
+    const std::vector<int8>& data, uint32 offset, size_t size) {
+  const int8* p = &data[0] + offset;
+  if (offset + size > data.size()) {
+    GPU_NOTREACHED();
+    return NULL;
+  }
+  return static_cast<T>(static_cast<const void*>(p));
+}
+
+void CachedProgramInfoManager::ProgramInfo::Update(
+    GLES2Implementation* gl, GLuint program) {
+  std::vector<int8> result;
+  gl->GetProgramInfoCHROMIUMHelper(program, &result);
+  if (result.empty()) {
+    // This should only happen on a lost context.
+    return;
+  }
+  GPU_DCHECK_GE(result.size(), sizeof(ProgramInfoHeader));
+  const ProgramInfoHeader* header = LocalGetAs<const ProgramInfoHeader*>(
+      result, 0, sizeof(header));
+  link_status_ = header->link_status != 0;
+  if (!link_status_) {
+    return;
+  }
+  attrib_infos_.clear();
+  uniform_infos_.clear();
+  max_attrib_name_length_ = 0;
+  max_uniform_name_length_ = 0;
+  const ProgramInput* inputs = LocalGetAs<const ProgramInput*>(
+      result, sizeof(*header),
+      sizeof(ProgramInput) * (header->num_attribs + header->num_attribs));
+  const ProgramInput* input = inputs;
+  for (uint32 ii = 0; ii < header->num_attribs; ++ii) {
+    const int32* location = LocalGetAs<const int32*>(
+        result, input->location_offset, sizeof(int32));
+    const char* name_buf = LocalGetAs<const char*>(
+        result, input->name_offset, input->name_length);
+    std::string name(name_buf, input->name_length);
+    attrib_infos_.push_back(
+        VertexAttribInfo(input->size, input->type, name, *location));
+    max_attrib_name_length_ = std::max(
+        static_cast<GLsizei>(name.size()), max_attrib_name_length_);
+    ++input;
+  }
+  for (uint32 ii = 0; ii < header->num_uniforms; ++ii) {
+    const int32* locations = LocalGetAs<const int32*>(
+        result, input->location_offset, sizeof(int32) * input->size);
+    const char* name_buf = LocalGetAs<const char*>(
+        result, input->name_offset, input->name_length);
+    std::string name(name_buf, input->name_length);
+    UniformInfo info(input->size, input->type, name);
+    max_uniform_name_length_ = std::max(
+        static_cast<GLsizei>(name.size()), max_uniform_name_length_);
+    for (int32 jj = 0; jj < input->size; ++jj) {
+      info.element_locations.push_back(locations[jj]);
+    }
+    uniform_infos_.push_back(info);
+    ++input;
+  }
+  GPU_DCHECK_EQ(header->num_attribs + header->num_uniforms,
+                static_cast<uint32>(input - inputs));
+}
+
+CachedProgramInfoManager::CachedProgramInfoManager() {
+}
+
+CachedProgramInfoManager::~CachedProgramInfoManager() {
+
+}
+
+CachedProgramInfoManager::ProgramInfo*
+    CachedProgramInfoManager::GetProgramInfo(
+        GLES2Implementation* gl, GLuint program) {
+  ProgramInfoMap::iterator it = program_infos_.find(program);
+  if (it == program_infos_.end()) {
+    return NULL;
+  }
+  ProgramInfo* info = &it->second;
+  info->Update(gl, program);
+  return info;
+}
+
+void CachedProgramInfoManager::CreateInfo(GLuint program) {
+  DeleteInfo(program);
+  std::pair<ProgramInfoMap::iterator, bool> result =
+      program_infos_.insert(std::make_pair(program, ProgramInfo()));
+
+  GPU_DCHECK(result.second);
+}
+
+void CachedProgramInfoManager::DeleteInfo(GLuint program) {
+  program_infos_.erase(program);
+}
+
+bool CachedProgramInfoManager::GetProgramiv(
+    GLES2Implementation* gl, GLuint program, GLenum pname, GLint* params) {
+  ProgramInfo* info = GetProgramInfo(gl, program);
+  if (!info) {
+    return false;
+  }
+  return info->GetProgramiv(pname, params);
+}
+
+GLint CachedProgramInfoManager::GetAttribLocation(
+    GLES2Implementation* gl, GLuint program, const char* name) {
+  ProgramInfo* info = GetProgramInfo(gl, program);
+  if (!info) {
+    return -1;
+  }
+  return info->GetAttribLocation(name);
+}
+
+GLint CachedProgramInfoManager::GetUniformLocation(
+    GLES2Implementation* gl, GLuint program, const char* name) {
+  ProgramInfo* info = GetProgramInfo(gl, program);
+  if (!info) {
+    return -1;
+  }
+  return info->GetUniformLocation(name);
+}
+
+bool CachedProgramInfoManager::GetActiveAttrib(
+    GLES2Implementation* gl,
+    GLuint program, GLuint index, GLsizei bufsize, GLsizei* length,
+    GLint* size, GLenum* type, char* name) {
+  ProgramInfo* info = GetProgramInfo(gl, program);
+  if (!info) {
+    return false;
+  }
+  const ProgramInfo::VertexAttribInfo* attrib_info = info->GetAttribInfo(index);
+  if (!attrib_info) {
+    return false;
+  }
+  if (size) {
+    *size = attrib_info->size;
+  }
+  if (type) {
+    *type = attrib_info->type;
+  }
+  if (length || name) {
+    GLsizei max_size = std::min(static_cast<size_t>(bufsize) - 1,
+                                std::max(static_cast<size_t>(0),
+                                         attrib_info->name.size() - 1));
+    if (length) {
+      *length = max_size;
+    }
+    if (name && bufsize > 0) {
+      memcpy(name, attrib_info->name.c_str(), max_size);
+      name[max_size] = '\0';
+    }
+  }
+  return true;
+}
+
+bool CachedProgramInfoManager::GetActiveUniform(
+    GLES2Implementation* gl,
+    GLuint program, GLuint index, GLsizei bufsize, GLsizei* length,
+    GLint* size, GLenum* type, char* name) {
+  ProgramInfo* info = GetProgramInfo(gl, program);
+  if (!info) {
+    return false;
+  }
+  const ProgramInfo::UniformInfo* uniform_info = info->GetUniformInfo(index);
+  if (!uniform_info) {
+    return false;
+  }
+  if (size) {
+    *size = uniform_info->size;
+  }
+  if (type) {
+    *type = uniform_info->type;
+  }
+  if (length || name) {
+    GLsizei max_size = std::min(static_cast<size_t>(bufsize) - 1,
+                                std::max(static_cast<size_t>(0),
+                                         uniform_info->name.size() - 1));
+    if (length) {
+      *length = max_size;
+    }
+    if (name && bufsize > 0) {
+      memcpy(name, uniform_info->name.c_str(), max_size);
+      name[max_size] = '\0';
+    }
+  }
+  return true;
+}
+
+ProgramInfoManager::ProgramInfoManager() {
+}
+
+ProgramInfoManager::~ProgramInfoManager() {
+}
+
+ProgramInfoManager* ProgramInfoManager::Create(bool shared_resources) {
+  if (shared_resources) {
+    return new NonCachedProgramInfoManager();
+  } else {
+    return new CachedProgramInfoManager();
+  }
+}
+
+}  // namespace gles2
+}  // namespace gpu
+
+