// 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.

// Contains various validation functions for the GLES2 service.

#ifndef GPU_COMMAND_BUFFER_SERVICE_GLES2_CMD_VALIDATION_H_
#define GPU_COMMAND_BUFFER_SERVICE_GLES2_CMD_VALIDATION_H_

#include <algorithm>
#include <vector>
#include "gpu/command_buffer/common/gles2_cmd_format.h"

namespace gpu {
namespace gles2 {

// ValueValidator returns true if a value is valid.
template <typename T>
class ValueValidator {
 public:
  ValueValidator() = default;

  ValueValidator(const T* valid_values, int num_values) {
    AddValues(valid_values, num_values);
  }

  void AddValue(const T value) {
    if (!IsValid(value)) {
      valid_values_.push_back(value);
    }
  }

  void AddValues(const T* valid_values, int num_values) {
    for (int ii = 0; ii < num_values; ++ii) {
      AddValue(valid_values[ii]);
    }
  }

  void RemoveValues(const T* invalid_values, int num_values) {
    for (int ii = 0; ii < num_values; ++ii) {
      auto iter = std::find(
          valid_values_.begin(), valid_values_.end(), invalid_values[ii]);
      if (iter != valid_values_.end()) {
        valid_values_.erase(iter);
        DCHECK(!IsValid(invalid_values[ii]));
      }
    }
  }

  bool IsValid(const T value) const {
    return std::find(valid_values_.begin(), valid_values_.end(), value) !=
           valid_values_.end();
  }

  const std::vector<T>& GetValues() const {
    return valid_values_;
  }

 private:
  std::vector<T> valid_values_;
};

struct Validators {
  Validators();

  void UpdateValuesES3();
  void UpdateETCCompressedTextureFormats();

#include "gpu/command_buffer/service/gles2_cmd_validation_autogen.h"
};

}  // namespace gles2
}  // namespace gpu

#endif  // GPU_COMMAND_BUFFER_SERVICE_GLES2_CMD_VALIDATION_H_