Get rid of NonCachedProgramInfoManager.

gpu/command_buffer/client/program_info_manager_program.cc

+// Copyright (c) 2015 The Chromium Authors. All rights reserved.

[piman, 2015/01/30 21:55:39]

Why separate this into another file?

[Zhenyao Mo, 2015/01/30 22:11:38]

Because I am planning to add UniformBlock related catching here, almost double
the file size.  So to separate the Program class files into its own file.  I
feel it's easier to read and maintain this way.

[piman, 2015/01/30 22:18:23]

I disagree :) If a class is defined in foo.h, the natural place to look for the
implementation is foo.cc. If it's not there you have to look for it. For
something named "Program", it is difficult to search for it in the codebase.

Another option is to not make it an inner class (which are discouraged anyway).

+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "gpu/command_buffer/client/program_info_manager.h"
+
+namespace {
+
+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()) {
+    NOTREACHED();
+    return NULL;
+  }
+  return static_cast<T>(static_cast<const void*>(p));
+}
+
+}  // namespace anonymous
+
+namespace gpu {
+namespace gles2 {
+
+ProgramInfoManager::Program::UniformInfo::UniformInfo(
+    GLsizei _size, GLenum _type, const std::string& _name)
+    : size(_size),
+      type(_type),
+      name(_name) {
+  is_array = (!name.empty() && name[name.size() - 1] == ']');
+  DCHECK(!(size > 1 && !is_array));
+}
+
+ProgramInfoManager::Program::Program()
+    : cached_(false),
+      max_attrib_name_length_(0),
+      max_uniform_name_length_(0),
+      link_status_(false) {
+}
+
+// TODO(gman): Add a faster lookup.
+GLint ProgramInfoManager::Program::GetAttribLocation(
+    const std::string& name) const {
+  for (GLuint ii = 0; ii < attrib_infos_.size(); ++ii) {
+    const VertexAttrib& info = attrib_infos_[ii];
+    if (info.name == name) {
+      return info.location;
+    }
+  }
+  return -1;
+}
+
+GLint ProgramInfoManager::Program::GetUniformLocation(
+    const std::string& name) const {
+  bool getting_array_location = false;
+  size_t open_pos = std::string::npos;
+  int index = 0;
+  if (!GLES2Util::ParseUniformName(
+      name, &open_pos, &index, &getting_array_location)) {
+    return -1;
+  }
+  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 (getting_array_location && info.is_array) {
+      // Look for an array specification.
+      size_t open_pos_2 = info.name.find_last_of('[');
+      if (open_pos_2 == open_pos &&
+          name.compare(0, open_pos, info.name, 0, open_pos) == 0) {
+        if (index >= 0 && index < info.size) {
+          return info.element_locations[index];
+        }
+      }
+    }
+  }
+  return -1;
+}
+
+GLint ProgramInfoManager::Program::GetFragDataLocation(
+    const std::string& name) const {
+  base::hash_map<std::string, GLint>::const_iterator iter =
+      frag_data_locations_.find(name);
+  if (iter == frag_data_locations_.end())
+    return -1;
+  return iter->second;
+}
+
+void ProgramInfoManager::Program::CacheFragDataLocation(
+    const std::string& name, GLint loc) {
+  frag_data_locations_[name] = loc;
+}
+
+bool ProgramInfoManager::Program::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;
+}
+
+void ProgramInfoManager::Program::Update(
+    GLES2Implementation* gl,
+    GLuint program,
+    const std::vector<int8>& result) {
+  if (cached_) {
+    return;
+  }
+  if (result.empty()) {
+    // This should only happen on a lost context.
+    return;
+  }
+  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();
+  frag_data_locations_.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_uniforms));
+  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(
+        VertexAttrib(input->size, input->type, name, *location));
+    max_attrib_name_length_ = std::max(
+        static_cast<GLsizei>(name.size() + 1), 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() + 1), 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;
+  }
+  DCHECK_EQ(header->num_attribs + header->num_uniforms,
+                static_cast<uint32>(input - inputs));
+  cached_ = true;
+}
+
+}  // namespace gles2
+}  // namespace gpu
+