pyktx.khr_df_model module

class pyktx.khr_df_model.KhrDfModel(value, names=None, *, module=None, qualname=None, type=None, start=1, boundary=None)[source]

Bases: IntEnum

Model in which the color coordinate space is defined.

UNSPECIFIED = 0: No interpretation of color channels defined.

RGBSDA = 1: Color primaries (red, green, blue) + alpha, depth and stencil.

YUVSDA = 2: Color differences (Y’, Cb, Cr) + alpha, depth and stencil.

YIQSDA = 3: Color differences (Y’, I, Q) + alpha, depth and stencil.

LABSDA = 4: Perceptual color (CIE L*a*b*) + alpha, depth and stencil.

CMYKA = 5: Subtractive colors (cyan, magenta, yellow, black) + alpha.

XYZW = 6: Non-color coordinate data (X, Y, Z, W).

HSVA_ANG = 7: Hue, saturation, value, hue angle on color circle, plus alpha.

HSLA_ANG = 8: Hue, saturation, lightness, hue angle on color circle, plus alpha.

HSVA_HEX = 9: Hue, saturation, value, hue on color hexagon, plus alpha.

HSLA_HEX = 10: Hue, saturation, lightness, hue on color hexagon, plus alpha.

YCGCOA = 11: Lightweight approximate color difference (luma, orange, green).

YCCBCCRC = 12: ITU BT.2020 constant luminance YcCbcCrc.

ICTCP = 13: ITU BT.2100 constant intensity ICtCp.

CIEXYZ = 14: CIE 1931 XYZ color coordinates (X, Y, Z).

CIEXYY = 15: CIE 1931 xyY color coordinates (X, Y, Y).

DXT1A = 128

BC1A = 128: Compressed formats start at 128.

DXT2 = 129

DXT3 = 129

BC2 = 129: DXT2/DXT3/BC2, with explicit 4-bit alpha.

DXT4 = 130

DXT5 = 130

BC3 = 130: DXT4/DXT5/BC3, with interpolated alpha.

ATI1N = 131

DXT5A = 131

BC4 = 131: ATI1n/DXT5A/BC4 - single channel interpolated 8-bit data. (The UNORM/SNORM variation is recorded in the channel data).

ATI2N_XY = 132

DXN = 132

BC5 = 132: ATI2n_XY/DXN/BC5 - two channel interpolated 8-bit data. (The UNORM/SNORM variation is recorded in the channel data).

BC6H = 133: BC6H - DX11 format for 16-bit float channels.

BC7 = 134: BC7 - DX11 format.

ETC1 = 160: A format of ETC1 indicates that the format shall be decodable by an ETC1-compliant decoder and not rely on ETC2 features.

ETC2 = 161: A format of ETC2 is permitted to use ETC2 encodings on top of the baseline ETC1 specification. The ETC2 format has channels “red”, “green”, “RGB” and “alpha”, which should be cosited samples. Punch-through alpha can be distinguished from full alpha by the plane size in bytes required for the texel block.

ASTC = 162: Adaptive Scalable Texture Compression.

ETC1S = 163: ETC1S is a simplified subset of ETC1.

PVRTC = 164

PVRTC2 = 165: PowerVR Texture Compression.

UASTC = 166

UASTC_LDR_4x4 = 166

UASTC_HDR_4x4 = 167

UASTC_HDR_6x6 = 168: UASTC for BASIS supercompression.

MAX = 255