Method load_texture_cubemap

framework/api_vulkan_sample.cpp:1231–1328

}

Texture ApiVulkanSample::load_texture_cubemap(const std::string &file, vkb::sg::Image::ContentType content_type)
{
	Texture texture{};

	texture.image = vkb::sg::Image::load(file, file, content_type);
	texture.image->create_vk_image(get_device(), VK_IMAGE_VIEW_TYPE_CUBE, VK_IMAGE_CREATE_CUBE_COMPATIBLE_BIT);

	const auto &queue = get_device().get_queue_by_flags(VK_QUEUE_GRAPHICS_BIT, 0);

	VkCommandBuffer command_buffer = get_device().create_command_buffer(VK_COMMAND_BUFFER_LEVEL_PRIMARY, true);

	vkb::core::BufferC stage_buffer = vkb::core::BufferC::create_staging_buffer(get_device(), texture.image->get_data());

	// Setup buffer copy regions for each mip level
	std::vector<VkBufferImageCopy> buffer_copy_regions;

	auto       &mipmaps = texture.image->get_mipmaps();
	const auto &layers  = texture.image->get_layers();

	auto &offsets = texture.image->get_offsets();

	for (uint32_t layer = 0; layer < layers; layer++)
	{
		for (size_t i = 0; i < mipmaps.size(); i++)
		{
			VkBufferImageCopy buffer_copy_region               = {};
			buffer_copy_region.imageSubresource.aspectMask     = VK_IMAGE_ASPECT_COLOR_BIT;
			buffer_copy_region.imageSubresource.mipLevel       = vkb::to_u32(i);
			buffer_copy_region.imageSubresource.baseArrayLayer = layer;
			buffer_copy_region.imageSubresource.layerCount     = 1;
			buffer_copy_region.imageExtent.width               = texture.image->get_extent().width >> i;
			buffer_copy_region.imageExtent.height              = texture.image->get_extent().height >> i;
			buffer_copy_region.imageExtent.depth               = 1;
			buffer_copy_region.bufferOffset                    = offsets[layer][i];

			buffer_copy_regions.push_back(buffer_copy_region);
		}
	}

	VkImageSubresourceRange subresource_range = {};
	subresource_range.aspectMask              = VK_IMAGE_ASPECT_COLOR_BIT;
	subresource_range.baseMipLevel            = 0;
	subresource_range.levelCount              = vkb::to_u32(mipmaps.size());
	subresource_range.layerCount              = layers;

	// Image barrier for optimal image (target)
	// Optimal image will be used as destination for the copy
	vkb::image_layout_transition(command_buffer,
	                             texture.image->get_vk_image().get_handle(),
	                             VK_IMAGE_LAYOUT_UNDEFINED,
	                             VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL,
	                             subresource_range);

	// Copy mip levels from staging buffer
	vkCmdCopyBufferToImage(
	    command_buffer,
	    stage_buffer.get_handle(),
	    texture.image->get_vk_image().get_handle(),