libcruft-vk/instance.cpp

/*
 * 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.
 *
 * Copyright:
 *      2016-2017, Danny Robson <danny@nerdcruft.net>
 */

#include "./instance.hpp"

#include "./traits.hpp"

using cruft::vk::instance;


///////////////////////////////////////////////////////////////////////////////
static const VkInstanceCreateInfo DEFAULT_INFO = {
    .sType = cruft::vk::structure_type_v<VkInstanceCreateInfo>,
    .pNext = nullptr,
    .flags = {},

    .pApplicationInfo = nullptr,

    .enabledLayerCount = 0,
    .ppEnabledLayerNames = nullptr,

    .enabledExtensionCount = 0,
    .ppEnabledExtensionNames = nullptr
};


//-----------------------------------------------------------------------------
instance::create_info_t::create_info_t ():
    create_info_t (DEFAULT_INFO)
{ ; }


//-----------------------------------------------------------------------------
instance::create_info_t::create_info_t (const VkInstanceCreateInfo &base):
    VkInstanceCreateInfo (base)
{ ; }


///////////////////////////////////////////////////////////////////////////////
instance::instance ():
    instance (create_info_t ())
{ ; }


//-----------------------------------------------------------------------------
instance::instance (const util::view<const char **> layers,
                    const util::view<const char **> extensions):
    instance (VkInstanceCreateInfo {
        .sType = cruft::vk::structure_type_v<VkInstanceCreateInfo>,
        .pNext = nullptr,
        .flags = {},
        .pApplicationInfo = nullptr,
        .enabledLayerCount = static_cast<uint32_t> (layers.size ()),
        .ppEnabledLayerNames = layers.data (),
        .enabledExtensionCount = static_cast<uint32_t> (extensions.size ()),
        .ppEnabledExtensionNames = extensions.data ()
    })
{ ; }


//-----------------------------------------------------------------------------
instance::instance (const create_info_t &info):
    root (&info, nullptr)
{ ; }



///////////////////////////////////////////////////////////////////////////////
std::set<std::string>
instance::extensions (void) const
{
    uint32_t expected = 0;
    error::try_code (vkEnumerateInstanceExtensionProperties (nullptr, &expected, nullptr));

    VkExtensionProperties props[expected];
    uint32_t found = expected;
    error::try_code (vkEnumerateInstanceExtensionProperties (nullptr, &found, props));

    std::set<std::string> ext;
    for (const auto &i: props)
        ext.insert (i.extensionName);
    return ext;
}


///////////////////////////////////////////////////////////////////////////////
std::vector<VkLayerProperties>
instance::available_layers (void)
{

    uint32_t count;
    vk::error::try_code (vkEnumerateInstanceLayerProperties (&count, nullptr));

    std::vector<VkLayerProperties> layers (count);
    vk::error::try_code (vkEnumerateInstanceLayerProperties (&count, layers.data ()));
    return layers;
}