#include "external_texture_loader.h"

#define TINYDDSLOADER_IMPLEMENTATION

#include "tinyddsloader.h"

otcv::Image* load_dds_rgba16f(const std::string& filename) {

tinyddsloader::DDSFile dds;

auto result = dds.Load(filename.data());

if (result != tinyddsloader::Result::Success) {

std::cout << "Load_dds_rgba16f error: cannot load " << filename << std::endl;

assert(false);

return nullptr;

}

if (dds.GetMipCount() > 1) {

std::cout << "Load_dds_rgba16f error: " << filename << " has more than 1 mip level" << std::endl;

assert(false);

return nullptr;

}

const auto& img_data = dds.GetImageData(0, 0);

if (dds.GetFormat() != tinyddsloader::DDSFile::DXGIFormat::R16G16B16A16_Float) {

throw std::runtime_error("DDS is not RGBA16F");

}

otcv::Image* img;

img = otcv::ImageBuilder()

.size(dds.GetWidth(), dds.GetHeight(), 1)

.format(VK_FORMAT_R16G16B16A16_SFLOAT)

.usage(VK_IMAGE_USAGE_TRANSFER_DST_BIT | VK_IMAGE_USAGE_SAMPLED_BIT)

.build();

img->populate(img_data->m_mem, img_data->m_memSlicePitch, otcv::ResourceState::FragSample);

return img;

}

otcv::Image* load_dummy_image() {

otcv::Image* img;

img = otcv::ImageBuilder()

.size(1, 1, 1)

.format(VK_FORMAT_R8G8B8A8_UNORM)

.usage(VK_IMAGE_USAGE_SAMPLED_BIT)

.build();

uint32_t zero = 0;

img->populate(&zero, sizeof(zero), otcv::ResourceState::FragSample);

return img;

}