TutorialUtils.cpp

// Copyright 2016 Google Inc. All Rights Reserved.
//
// 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 "TutorialUtils.hpp"


extern VkPhysicalDeviceMemoryProperties tutorialMemoryProperties;

VkResult memory_type_from_properties(uint32_t typeBits, VkFlags requirements_mask,
                                 uint32_t *typeIndex) {
  // Search memtypes to find first index with those properties
  for (uint32_t i = 0; i < 32; i++) {
    if ((typeBits & 1) == 1) {
      // Type is available, does it match user properties?
      if ((tutorialMemoryProperties.memoryTypes[i].propertyFlags &
           requirements_mask) == requirements_mask) {
        *typeIndex = i;
        return VK_SUCCESS;
      }
    }
    typeBits >>= 1;
  }
  // No memory types matched, return failure
  return VK_ERROR_MEMORY_MAP_FAILED;
}