Function convertVkFormat

lib/source/lib.cpp:103–184

}

Result convertVkFormat(vkHelper& _vulkan, const VkCommandBuffer _commandBuffer, const VkImage _srcImage, VkImage& _outImage, VkFormat _dstFormat, const VkImageLayout inputImageLayout = VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL)
{
	const VkImageCreateInfo* pInfo = _vulkan.getCreateInfo(_srcImage);

	if (pInfo == nullptr)
	{
		return Result::InvalidArgument;
	}

	if (_outImage != VK_NULL_HANDLE)
	{
		printf("Expecting empty outImage\n");
		return Result::InvalidArgument;
	}

	const VkFormat srcFormat = pInfo->format;
	const uint32_t sideLength = pInfo->extent.width;
	const uint32_t mipLevels = pInfo->mipLevels;
	const uint32_t arrayLayers = pInfo->arrayLayers;

	if (_vulkan.createImage2DAndAllocate(_outImage, sideLength, sideLength, _dstFormat,
																			 VK_IMAGE_USAGE_TRANSFER_SRC_BIT | VK_IMAGE_USAGE_TRANSFER_DST_BIT,
																			 mipLevels, arrayLayers, VK_IMAGE_TILING_OPTIMAL, VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT, VK_SHARING_MODE_EXCLUSIVE) != VK_SUCCESS)
	{
		return Result::VulkanError;
	}

	VkImageSubresourceRange subresourceRange{};
	subresourceRange.aspectMask = VK_IMAGE_ASPECT_COLOR_BIT;
	subresourceRange.baseMipLevel = 0;
	subresourceRange.levelCount = mipLevels;
	subresourceRange.layerCount = arrayLayers;
	
	_vulkan.imageBarrier(_commandBuffer, _outImage,
											 VK_IMAGE_LAYOUT_UNDEFINED, VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL,
											 VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT, VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT,//src stage, access
											 VK_PIPELINE_STAGE_TRANSFER_BIT, VK_ACCESS_TRANSFER_WRITE_BIT,//dst stage, access
											 subresourceRange);

	_vulkan.imageBarrier(_commandBuffer, _srcImage,
											 inputImageLayout, VK_IMAGE_LAYOUT_TRANSFER_SRC_OPTIMAL,
											 VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT, VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT,//src stage, access
											 VK_PIPELINE_STAGE_TRANSFER_BIT, VK_ACCESS_TRANSFER_READ_BIT,//dst stage, access
											 subresourceRange);
	
	uint32_t currentSideLength = sideLength;

	for (uint32_t level = 0; level < mipLevels; level++)
	{
		VkImageBlit imageBlit{};

		// Source
		imageBlit.srcSubresource.aspectMask = VK_IMAGE_ASPECT_COLOR_BIT;
		imageBlit.srcSubresource.layerCount = arrayLayers;
		imageBlit.srcSubresource.mipLevel = level;
		imageBlit.srcOffsets[1].x = currentSideLength;
		imageBlit.srcOffsets[1].y = currentSideLength;
		imageBlit.srcOffsets[1].z = 1;