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template <typename T, typename... Ts>
struct StructureChain : T, StructureChain<Ts...>
{
StructureChain(const T &t, const Ts&... a) : T(t), StructureChain<Ts...>(a...)
{
((T*)this)->pNext = (StructureChain<Ts...>*)this;
}
};
template <typename T>
struct StructureChain<T> : T
{
StructureChain(const T &t) : T(t){}
};
// Positional arguments? Im my C++? It's more likely than you think!
template<typename T>
struct SetterFunc;
template<typename T, typename V>
struct SetterVal
{
const SetterFunc<T> &func;
const V &val;
SetterVal(const SetterFunc<T> &f, const V &v) : func(f), val(v){}
};
template<typename T>
struct SetterFunc
{
const T &func;
SetterFunc(const T &data)
: func(data)
{}
template <typename V>
SetterVal<T,V> operator() (const V &v) {return SetterVal(*this,v);}
template <typename V>
SetterVal<T,V> operator= (const V &v) {return SetterVal(*this,v);}
};
template <typename T, typename... Ts>
void FillStructure(T &t, const Ts&... ts)
{
auto filler = [](T &t, const auto &arg){
auto T::*ptr = arg.func.func(t);
t.*ptr = arg.val;
};
(filler(t,ts),...);
}
// todo: remove extra unused copy
#define $(k) SetterFunc([](auto a){return &decltype(a)::k;})
template <typename T, typename... Ts>
T $M(T t, const Ts&... ts)
{
FillStructure(t, ts...);
return t;
}
// ...
VkSubresourceLayout layout = {0};
layout.rowPitch = pitch1;
StructureChain iinfo{
$M(VkImageCreateInfo{VK_STRUCTURE_TYPE_IMAGE_CREATE_INFO},
$(imageType) = VK_IMAGE_TYPE_2D,
$(format) = p010?VK_FORMAT_R16_UNORM:VK_FORMAT_R8_UNORM,
$(extent) = VkExtent3D{ WIDTH, HEIGHT, 1 },
$(mipLevels) = 1,
$(arrayLayers)= 1,
$(samples) =VK_SAMPLE_COUNT_1_BIT,
$(tiling) = VK_IMAGE_TILING_DRM_FORMAT_MODIFIER_EXT,
$(usage) = VK_IMAGE_USAGE_STORAGE_BIT,
$(sharingMode) = VK_SHARING_MODE_EXCLUSIVE
),
$M(VkExternalMemoryImageCreateInfo{VK_STRUCTURE_TYPE_EXTERNAL_MEMORY_IMAGE_CREATE_INFO},
$(handleTypes) = VK_EXTERNAL_MEMORY_HANDLE_TYPE_DMA_BUF_BIT_EXT
),
$M(VkImageDrmFormatModifierExplicitCreateInfoEXT{VK_STRUCTURE_TYPE_IMAGE_DRM_FORMAT_MODIFIER_EXPLICIT_CREATE_INFO_EXT},
$(drmFormatModifierPlaneCount) = 1,
$(drmFormatModifier) = mod,
$(pPlaneLayouts) = &layout
)
};
VK_CHECK_RESULT(vkCreateImage(dev.device, &iinfo, NULL, &texture0.image)); // create image.
Positional arguments? Im my C++? It's more likely than you think!
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