DDS DX10 header (DDS_HEADER_DXT10)

When the pixel format has the flag DDPF_FOURCC and the code DX10, a 20-byte DDS_HEADER_DXT10 follows the main header. It holds a DXGI format, which covers floating point, sRGB and BC6H and BC7 formats, and the array size.

Fields

File offset	Size	Name	Description
128	4	`dxgiFormat`	A `DXGI_FORMAT` value; see below.
132	4	`resourceDimension`	The kind of resource; see below.
136	4	`miscFlag`	Less common options; see below.
140	4	`arraySize`	The number of array elements. For a 3D texture it must be 1. For a cube map texture it is the number of cubes, so the file holds `arraySize × 6` textures.
144	4	`miscFlags2`	The low 3 bits give the alpha mode; the upper 29 bits are reserved.

resourceDimension

Value	Name	Meaning
2	`DDS_DIMENSION_TEXTURE1D`	A 1D texture. Set height to 1, with `DDSD_HEIGHT`.
3	`DDS_DIMENSION_TEXTURE2D`	A 2D texture, or a cube map.
4	`DDS_DIMENSION_TEXTURE3D`	A 3D texture, with `DDSD_DEPTH` set.

miscFlag value	Name	Meaning
`0x4`	`DDS_RESOURCE_MISC_TEXTURECUBE`	The 2D texture is a cube map.

Alpha mode

Value	Name	Meaning
`0x0`	`DDS_ALPHA_MODE_UNKNOWN`	Unknown; legacy files, usually assumed to be straight.
`0x1`	`DDS_ALPHA_MODE_STRAIGHT`	Straight alpha.
`0x2`	`DDS_ALPHA_MODE_PREMULTIPLIED`	Premultiplied alpha. Among legacy formats, only `DXT2` and `DXT4` express this.
`0x3`	`DDS_ALPHA_MODE_OPAQUE`	The alpha channel is fully opaque.
`0x4`	`DDS_ALPHA_MODE_CUSTOM`	A fourth channel, not transparency.

The legacy D3DX 10 and D3DX 11 libraries fail to load a file whose miscFlags2 is not zero.

DXGI formats

Every value of the DXGI_FORMAT enumeration in Microsoft’s documentation. Depth, video and typeless formats are listed for completeness; a DDS file normally holds texture formats. Values not listed here (116 to 129 and 133 to 188) are not assigned in that list.

Value	Name
0	`DXGI_FORMAT_UNKNOWN`
1	`DXGI_FORMAT_R32G32B32A32_TYPELESS`
2	`DXGI_FORMAT_R32G32B32A32_FLOAT`
3	`DXGI_FORMAT_R32G32B32A32_UINT`
4	`DXGI_FORMAT_R32G32B32A32_SINT`
5	`DXGI_FORMAT_R32G32B32_TYPELESS`
6	`DXGI_FORMAT_R32G32B32_FLOAT`
7	`DXGI_FORMAT_R32G32B32_UINT`
8	`DXGI_FORMAT_R32G32B32_SINT`
9	`DXGI_FORMAT_R16G16B16A16_TYPELESS`
10	`DXGI_FORMAT_R16G16B16A16_FLOAT`
11	`DXGI_FORMAT_R16G16B16A16_UNORM`
12	`DXGI_FORMAT_R16G16B16A16_UINT`
13	`DXGI_FORMAT_R16G16B16A16_SNORM`
14	`DXGI_FORMAT_R16G16B16A16_SINT`
15	`DXGI_FORMAT_R32G32_TYPELESS`
16	`DXGI_FORMAT_R32G32_FLOAT`
17	`DXGI_FORMAT_R32G32_UINT`
18	`DXGI_FORMAT_R32G32_SINT`
19	`DXGI_FORMAT_R32G8X24_TYPELESS`
20	`DXGI_FORMAT_D32_FLOAT_S8X24_UINT`
21	`DXGI_FORMAT_R32_FLOAT_X8X24_TYPELESS`
22	`DXGI_FORMAT_X32_TYPELESS_G8X24_UINT`
23	`DXGI_FORMAT_R10G10B10A2_TYPELESS`
24	`DXGI_FORMAT_R10G10B10A2_UNORM`
25	`DXGI_FORMAT_R10G10B10A2_UINT`
26	`DXGI_FORMAT_R11G11B10_FLOAT`
27	`DXGI_FORMAT_R8G8B8A8_TYPELESS`
28	`DXGI_FORMAT_R8G8B8A8_UNORM`
29	`DXGI_FORMAT_R8G8B8A8_UNORM_SRGB`
30	`DXGI_FORMAT_R8G8B8A8_UINT`
31	`DXGI_FORMAT_R8G8B8A8_SNORM`
32	`DXGI_FORMAT_R8G8B8A8_SINT`
33	`DXGI_FORMAT_R16G16_TYPELESS`
34	`DXGI_FORMAT_R16G16_FLOAT`
35	`DXGI_FORMAT_R16G16_UNORM`
36	`DXGI_FORMAT_R16G16_UINT`
37	`DXGI_FORMAT_R16G16_SNORM`
38	`DXGI_FORMAT_R16G16_SINT`
39	`DXGI_FORMAT_R32_TYPELESS`
40	`DXGI_FORMAT_D32_FLOAT`
41	`DXGI_FORMAT_R32_FLOAT`
42	`DXGI_FORMAT_R32_UINT`
43	`DXGI_FORMAT_R32_SINT`
44	`DXGI_FORMAT_R24G8_TYPELESS`
45	`DXGI_FORMAT_D24_UNORM_S8_UINT`
46	`DXGI_FORMAT_R24_UNORM_X8_TYPELESS`
47	`DXGI_FORMAT_X24_TYPELESS_G8_UINT`
48	`DXGI_FORMAT_R8G8_TYPELESS`
49	`DXGI_FORMAT_R8G8_UNORM`
50	`DXGI_FORMAT_R8G8_UINT`
51	`DXGI_FORMAT_R8G8_SNORM`
52	`DXGI_FORMAT_R8G8_SINT`
53	`DXGI_FORMAT_R16_TYPELESS`
54	`DXGI_FORMAT_R16_FLOAT`
55	`DXGI_FORMAT_D16_UNORM`
56	`DXGI_FORMAT_R16_UNORM`
57	`DXGI_FORMAT_R16_UINT`
58	`DXGI_FORMAT_R16_SNORM`
59	`DXGI_FORMAT_R16_SINT`
60	`DXGI_FORMAT_R8_TYPELESS`
61	`DXGI_FORMAT_R8_UNORM`
62	`DXGI_FORMAT_R8_UINT`
63	`DXGI_FORMAT_R8_SNORM`
64	`DXGI_FORMAT_R8_SINT`
65	`DXGI_FORMAT_A8_UNORM`
66	`DXGI_FORMAT_R1_UNORM`
67	`DXGI_FORMAT_R9G9B9E5_SHAREDEXP`
68	`DXGI_FORMAT_R8G8_B8G8_UNORM`
69	`DXGI_FORMAT_G8R8_G8B8_UNORM`
70	`DXGI_FORMAT_BC1_TYPELESS`
71	`DXGI_FORMAT_BC1_UNORM`
72	`DXGI_FORMAT_BC1_UNORM_SRGB`
73	`DXGI_FORMAT_BC2_TYPELESS`
74	`DXGI_FORMAT_BC2_UNORM`
75	`DXGI_FORMAT_BC2_UNORM_SRGB`
76	`DXGI_FORMAT_BC3_TYPELESS`
77	`DXGI_FORMAT_BC3_UNORM`
78	`DXGI_FORMAT_BC3_UNORM_SRGB`
79	`DXGI_FORMAT_BC4_TYPELESS`
80	`DXGI_FORMAT_BC4_UNORM`
81	`DXGI_FORMAT_BC4_SNORM`
82	`DXGI_FORMAT_BC5_TYPELESS`
83	`DXGI_FORMAT_BC5_UNORM`
84	`DXGI_FORMAT_BC5_SNORM`
85	`DXGI_FORMAT_B5G6R5_UNORM`
86	`DXGI_FORMAT_B5G5R5A1_UNORM`
87	`DXGI_FORMAT_B8G8R8A8_UNORM`
88	`DXGI_FORMAT_B8G8R8X8_UNORM`
89	`DXGI_FORMAT_R10G10B10_XR_BIAS_A2_UNORM`
90	`DXGI_FORMAT_B8G8R8A8_TYPELESS`
91	`DXGI_FORMAT_B8G8R8A8_UNORM_SRGB`
92	`DXGI_FORMAT_B8G8R8X8_TYPELESS`
93	`DXGI_FORMAT_B8G8R8X8_UNORM_SRGB`
94	`DXGI_FORMAT_BC6H_TYPELESS`
95	`DXGI_FORMAT_BC6H_UF16`
96	`DXGI_FORMAT_BC6H_SF16`
97	`DXGI_FORMAT_BC7_TYPELESS`
98	`DXGI_FORMAT_BC7_UNORM`
99	`DXGI_FORMAT_BC7_UNORM_SRGB`
100	`DXGI_FORMAT_AYUV`
101	`DXGI_FORMAT_Y410`
102	`DXGI_FORMAT_Y416`
103	`DXGI_FORMAT_NV12`
104	`DXGI_FORMAT_P010`
105	`DXGI_FORMAT_P016`
106	`DXGI_FORMAT_420_OPAQUE`
107	`DXGI_FORMAT_YUY2`
108	`DXGI_FORMAT_Y210`
109	`DXGI_FORMAT_Y216`
110	`DXGI_FORMAT_NV11`
111	`DXGI_FORMAT_AI44`
112	`DXGI_FORMAT_IA44`
113	`DXGI_FORMAT_P8`
114	`DXGI_FORMAT_A8P8`
115	`DXGI_FORMAT_B4G4R4A4_UNORM`
130	`DXGI_FORMAT_P208`
131	`DXGI_FORMAT_V208`
132	`DXGI_FORMAT_V408`
189	`DXGI_FORMAT_SAMPLER_FEEDBACK_MIN_MIP_OPAQUE`
190	`DXGI_FORMAT_SAMPLER_FEEDBACK_MIP_REGION_USED_OPAQUE`
191	`DXGI_FORMAT_A4B4G4R4_UNORM`

.DDS File Format – DX10 header

Fields

resourceDimension

Alpha mode

DXGI formats