// Copyright 2020 The Tint Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#include "src/type/matrix_type.h"

#include <assert.h>

#include "src/clone_context.h"
#include "src/program_builder.h"
#include "src/type/array_type.h"
#include "src/type/vector_type.h"

TINT_INSTANTIATE_CLASS_ID(tint::type::Matrix);

namespace tint {
namespace type {

Matrix::Matrix(Type* subtype, uint32_t rows, uint32_t columns)
    : subtype_(subtype), rows_(rows), columns_(columns) {
  assert(rows > 1);
  assert(rows < 5);
  assert(columns > 1);
  assert(columns < 5);
}

Matrix::Matrix(Matrix&&) = default;

Matrix::~Matrix() = default;

std::string Matrix::type_name() const {
  return "__mat_" + std::to_string(rows_) + "_" + std::to_string(columns_) +
         subtype_->type_name();
}

uint64_t Matrix::MinBufferBindingSize(MemoryLayout mem_layout) const {
  Vector vec(subtype_, rows_);
  return (columns_ - 1) * vec.BaseAlignment(mem_layout) +
         vec.MinBufferBindingSize(mem_layout);
}

uint64_t Matrix::BaseAlignment(MemoryLayout mem_layout) const {
  Vector vec(subtype_, rows_);
  Array arr(&vec, columns_, ast::ArrayDecorationList{});
  return arr.BaseAlignment(mem_layout);
}

Matrix* Matrix::Clone(CloneContext* ctx) const {
  return ctx->dst->create<Matrix>(ctx->Clone(subtype_), rows_, columns_);
}

}  // namespace type
}  // namespace tint