DXGI format utils

dxgi_format.h

#pragma once

constexpr size_t DxgiFormatRowSize(DXGI_FORMAT format, uint width)
{
	switch (format)
	{
	case DXGI_FORMAT_R32G32B32A32_TYPELESS:
	case DXGI_FORMAT_R32G32B32A32_FLOAT:
	case DXGI_FORMAT_R32G32B32A32_UINT:
	case DXGI_FORMAT_R32G32B32A32_SINT:
		return width * 16u;
	case DXGI_FORMAT_R32G32B32_TYPELESS:
	case DXGI_FORMAT_R32G32B32_FLOAT:
	case DXGI_FORMAT_R32G32B32_UINT:
	case DXGI_FORMAT_R32G32B32_SINT:
		return width * 12u;
	case DXGI_FORMAT_R16G16B16A16_TYPELESS:
	case DXGI_FORMAT_R16G16B16A16_FLOAT:
	case DXGI_FORMAT_R16G16B16A16_UNORM:
	case DXGI_FORMAT_R16G16B16A16_UINT:
	case DXGI_FORMAT_R16G16B16A16_SNORM:
	case DXGI_FORMAT_R16G16B16A16_SINT:
	case DXGI_FORMAT_R32G32_TYPELESS:
	case DXGI_FORMAT_R32G32_FLOAT:
	case DXGI_FORMAT_R32G32_UINT:
	case DXGI_FORMAT_R32G32_SINT:
	case DXGI_FORMAT_R32G8X24_TYPELESS:
	case DXGI_FORMAT_D32_FLOAT_S8X24_UINT:
	case DXGI_FORMAT_R32_FLOAT_X8X24_TYPELESS:
	case DXGI_FORMAT_X32_TYPELESS_G8X24_UINT:
		return width * 8u;
	case DXGI_FORMAT_R10G10B10A2_TYPELESS:
	case DXGI_FORMAT_R10G10B10A2_UNORM:
	case DXGI_FORMAT_R10G10B10A2_UINT:
	case DXGI_FORMAT_R11G11B10_FLOAT:
	case DXGI_FORMAT_R8G8B8A8_TYPELESS:
	case DXGI_FORMAT_R8G8B8A8_UNORM:
	case DXGI_FORMAT_R8G8B8A8_UNORM_SRGB:
	case DXGI_FORMAT_R8G8B8A8_UINT:
	case DXGI_FORMAT_R8G8B8A8_SNORM:
	case DXGI_FORMAT_R8G8B8A8_SINT:
	case DXGI_FORMAT_R16G16_TYPELESS:
	case DXGI_FORMAT_R16G16_FLOAT:
	case DXGI_FORMAT_R16G16_UNORM:
	case DXGI_FORMAT_R16G16_UINT:
	case DXGI_FORMAT_R16G16_SNORM:
	case DXGI_FORMAT_R16G16_SINT:
	case DXGI_FORMAT_R32_TYPELESS:
	case DXGI_FORMAT_D32_FLOAT:
	case DXGI_FORMAT_R32_FLOAT:
	case DXGI_FORMAT_R32_UINT:
	case DXGI_FORMAT_R32_SINT:
	case DXGI_FORMAT_R24G8_TYPELESS:
	case DXGI_FORMAT_D24_UNORM_S8_UINT:
	case DXGI_FORMAT_R24_UNORM_X8_TYPELESS:
	case DXGI_FORMAT_X24_TYPELESS_G8_UINT:
	case DXGI_FORMAT_R9G9B9E5_SHAREDEXP:
	case DXGI_FORMAT_R8G8_B8G8_UNORM:
	case DXGI_FORMAT_G8R8_G8B8_UNORM:
	case DXGI_FORMAT_B8G8R8A8_UNORM:
	case DXGI_FORMAT_B8G8R8X8_UNORM:
	case DXGI_FORMAT_R10G10B10_XR_BIAS_A2_UNORM:
	case DXGI_FORMAT_B8G8R8A8_TYPELESS:
	case DXGI_FORMAT_B8G8R8A8_UNORM_SRGB:
	case DXGI_FORMAT_B8G8R8X8_TYPELESS:
	case DXGI_FORMAT_B8G8R8X8_UNORM_SRGB:
		return width * 4u;
	case DXGI_FORMAT_R8G8_TYPELESS:
	case DXGI_FORMAT_R8G8_UNORM:
	case DXGI_FORMAT_R8G8_UINT:
	case DXGI_FORMAT_R8G8_SNORM:
	case DXGI_FORMAT_R8G8_SINT:
	case DXGI_FORMAT_R16_TYPELESS:
	case DXGI_FORMAT_R16_FLOAT:
	case DXGI_FORMAT_D16_UNORM:
	case DXGI_FORMAT_R16_UNORM:
	case DXGI_FORMAT_R16_UINT:
	case DXGI_FORMAT_R16_SNORM:
	case DXGI_FORMAT_R16_SINT:
	case DXGI_FORMAT_B5G6R5_UNORM:
	case DXGI_FORMAT_B5G5R5A1_UNORM:
		return width * 2u;
	case DXGI_FORMAT_R8_TYPELESS:
	case DXGI_FORMAT_R8_UNORM:
	case DXGI_FORMAT_R8_UINT:
	case DXGI_FORMAT_R8_SNORM:
	case DXGI_FORMAT_R8_SINT:
	case DXGI_FORMAT_A8_UNORM:
	case DXGI_FORMAT_BC2_TYPELESS:
	case DXGI_FORMAT_BC2_UNORM:
	case DXGI_FORMAT_BC2_UNORM_SRGB:
	case DXGI_FORMAT_BC3_TYPELESS:
	case DXGI_FORMAT_BC3_UNORM:
	case DXGI_FORMAT_BC3_UNORM_SRGB:
	case DXGI_FORMAT_BC5_TYPELESS:
	case DXGI_FORMAT_BC5_UNORM:
	case DXGI_FORMAT_BC5_SNORM:
	case DXGI_FORMAT_BC6H_TYPELESS:
	case DXGI_FORMAT_BC6H_UF16:
	case DXGI_FORMAT_BC6H_SF16:
	case DXGI_FORMAT_BC7_TYPELESS:
	case DXGI_FORMAT_BC7_UNORM:
	case DXGI_FORMAT_BC7_UNORM_SRGB:
		return width;
	case DXGI_FORMAT_BC1_TYPELESS:
	case DXGI_FORMAT_BC1_UNORM:
	case DXGI_FORMAT_BC1_UNORM_SRGB:
	case DXGI_FORMAT_BC4_TYPELESS:
	case DXGI_FORMAT_BC4_UNORM:
	case DXGI_FORMAT_BC4_SNORM:
		return max(width / 2u, 1);
	default:
		return 0;
	}
}