module sdl3::sdl;

const char  ALPHA_OPAQUE = 255;
const char  ALPHA_TRANSPARENT = 0;
const float ALPHA_OPAQUE_FLOAT = 1.0;
const float ALPHA_TRANSPARENT_FLOAT = 0.0;

enum PixelType : inline CInt {
    PIXELTYPE_UNKNOWN,
    PIXELTYPE_INDEX1,
    PIXELTYPE_INDEX4,
    PIXELTYPE_INDEX8,
    PIXELTYPE_PACKED8,
    PIXELTYPE_PACKED16,
    PIXELTYPE_PACKED32,
    PIXELTYPE_ARRAYU8,
    PIXELTYPE_ARRAYU16,
    PIXELTYPE_ARRAYU32,
    PIXELTYPE_ARRAYF16,
    PIXELTYPE_ARRAYF32,
    PIXELTYPE_INDEX2
}

enum SDL_BitmapOrder : inline CInt {
    BITMAPORDER_NONE,
    BITMAPORDER_4321,
    BITMAPORDER_1234
}

enum PackedOrder : inline CInt {
    PACKEDORDER_NONE,
    PACKEDORDER_XRGB,
    PACKEDORDER_RGBX,
    PACKEDORDER_ARGB,
    PACKEDORDER_RGBA,
    PACKEDORDER_XBGR,
    PACKEDORDER_BGRX,
    PACKEDORDER_ABGR,
    PACKEDORDER_BGRA
}

enum ArrayOrder : inline CInt {
    ARRAYORDER_NONE,
    ARRAYORDER_RGB,
    ARRAYORDER_RGBA,
    ARRAYORDER_ARGB,
    ARRAYORDER_BGR,
    ARRAYORDER_BGRA,
    ARRAYORDER_ABGR
}

enum PackedLayout : inline CInt {
    PACKEDLAYOUT_NONE,
    PACKEDLAYOUT_332,
    PACKEDLAYOUT_4444,
    PACKEDLAYOUT_1555,
    PACKEDLAYOUT_5551,
    PACKEDLAYOUT_565,
    PACKEDLAYOUT_8888,
    PACKEDLAYOUT_2101010,
    PACKEDLAYOUT_1010102
}

// TODO: a bunch of pixleformat related macros here i don't want to bother implementing

typedef PixelFormat = CInt;

const PixelFormat PIXELFORMAT_UNKNOWN @builtin       = 0;
const PixelFormat PIXELFORMAT_INDEX1LSB @builtin     = 0x11100100;
const PixelFormat PIXELFORMAT_INDEX1MSB @builtin     = 0x11200100;
const PixelFormat PIXELFORMAT_INDEX2LSB @builtin     = 0x1c100200;
const PixelFormat PIXELFORMAT_INDEX2MSB @builtin     = 0x1c200200;
const PixelFormat PIXELFORMAT_INDEX4LSB @builtin     = 0x12100400;
const PixelFormat PIXELFORMAT_INDEX4MSB @builtin     = 0x12200400;
const PixelFormat PIXELFORMAT_INDEX8 @builtin        = 0x13000801;
const PixelFormat PIXELFORMAT_RGB332 @builtin        = 0x14110801;
const PixelFormat PIXELFORMAT_XRGB4444 @builtin      = 0x15120c02;
const PixelFormat PIXELFORMAT_XBGR4444 @builtin      = 0x15520c02;
const PixelFormat PIXELFORMAT_XRGB1555 @builtin      = 0x15130f02;
const PixelFormat PIXELFORMAT_XBGR1555 @builtin      = 0x15530f02;
const PixelFormat PIXELFORMAT_ARGB4444 @builtin      = 0x15321002;
const PixelFormat PIXELFORMAT_RGBA4444 @builtin      = 0x15421002;
const PixelFormat PIXELFORMAT_ABGR4444 @builtin      = 0x15721002;
const PixelFormat PIXELFORMAT_BGRA4444 @builtin      = 0x15821002;
const PixelFormat PIXELFORMAT_ARGB1555 @builtin      = 0x15331002;
const PixelFormat PIXELFORMAT_RGBA5551 @builtin      = 0x15441002;
const PixelFormat PIXELFORMAT_ABGR1555 @builtin      = 0x15731002;
const PixelFormat PIXELFORMAT_BGRA5551 @builtin      = 0x15841002;
const PixelFormat PIXELFORMAT_RGB565 @builtin        = 0x15151002;
const PixelFormat PIXELFORMAT_BGR565 @builtin        = 0x15551002;
const PixelFormat PIXELFORMAT_RGB24 @builtin         = 0x17101803;
const PixelFormat PIXELFORMAT_BGR24 @builtin         = 0x17401803;
const PixelFormat PIXELFORMAT_XRGB8888 @builtin      = 0x16161804;
const PixelFormat PIXELFORMAT_RGBX8888 @builtin      = 0x16261804;
const PixelFormat PIXELFORMAT_XBGR8888 @builtin      = 0x16561804;
const PixelFormat PIXELFORMAT_BGRX8888 @builtin      = 0x16661804;
const PixelFormat PIXELFORMAT_ARGB8888 @builtin      = 0x16362004;
const PixelFormat PIXELFORMAT_RGBA8888 @builtin      = 0x16462004;
const PixelFormat PIXELFORMAT_ABGR8888 @builtin      = 0x16762004;
const PixelFormat PIXELFORMAT_BGRA8888 @builtin      = 0x16862004;
const PixelFormat PIXELFORMAT_XRGB2101010 @builtin   = 0x16172004;
const PixelFormat PIXELFORMAT_XBGR2101010 @builtin   = 0x16572004;
const PixelFormat PIXELFORMAT_ARGB2101010 @builtin   = 0x16372004;
const PixelFormat PIXELFORMAT_ABGR2101010 @builtin   = 0x16772004;
const PixelFormat PIXELFORMAT_RGB48 @builtin         = 0x18103006;
const PixelFormat PIXELFORMAT_BGR48 @builtin         = 0x18403006;
const PixelFormat PIXELFORMAT_RGBA64 @builtin        = 0x18204008;
const PixelFormat PIXELFORMAT_ARGB64 @builtin        = 0x18304008;
const PixelFormat PIXELFORMAT_BGRA64 @builtin        = 0x18504008;
const PixelFormat PIXELFORMAT_ABGR64 @builtin        = 0x18604008;
const PixelFormat PIXELFORMAT_RGB48_FLOAT @builtin   = 0x1a103006;
const PixelFormat PIXELFORMAT_BGR48_FLOAT @builtin   = 0x1a403006;
const PixelFormat PIXELFORMAT_RGBA64_FLOAT @builtin  = 0x1a204008;
const PixelFormat PIXELFORMAT_ARGB64_FLOAT @builtin  = 0x1a304008;
const PixelFormat PIXELFORMAT_BGRA64_FLOAT @builtin  = 0x1a504008;
const PixelFormat PIXELFORMAT_ABGR64_FLOAT @builtin  = 0x1a604008;
const PixelFormat PIXELFORMAT_RGB96_FLOAT @builtin   = 0x1b10600c;
const PixelFormat PIXELFORMAT_BGR96_FLOAT @builtin   = 0x1b40600c;
const PixelFormat PIXELFORMAT_RGBA128_FLOAT @builtin = 0x1b208010;
const PixelFormat PIXELFORMAT_ARGB128_FLOAT @builtin = 0x1b308010;
const PixelFormat PIXELFORMAT_BGRA128_FLOAT @builtin = 0x1b508010;
const PixelFormat PIXELFORMAT_ABGR128_FLOAT @builtin = 0x1b608010;
const PixelFormat PIXELFORMAT_YV12 @builtin          = 0x32315659;
const PixelFormat PIXELFORMAT_IYUV @builtin          = 0x56555949;
const PixelFormat PIXELFORMAT_YUY2 @builtin          = 0x32595559;
const PixelFormat PIXELFORMAT_UYVY @builtin          = 0x59565955;
const PixelFormat PIXELFORMAT_YVYU @builtin          = 0x55595659;
const PixelFormat PIXELFORMAT_NV12 @builtin          = 0x3231564e;
const PixelFormat PIXELFORMAT_NV21 @builtin          = 0x3132564e;
const PixelFormat PIXELFORMAT_P010 @builtin          = 0x30313050;
const PixelFormat PIXELFORMAT_EXTERNAL_OES @builtin  = 0x2053454f;
const PixelFormat PIXELFORMAT_MJPG @builtin          = 0x47504a4d;
    // FIXME: this only works in little-endian systems
const PixelFormat PIXELFORMAT_RGBA32 @builtin = PIXELFORMAT_ABGR8888;
const PixelFormat PIXELFORMAT_ARGB32 @builtin = PIXELFORMAT_BGRA8888;
const PixelFormat PIXELFORMAT_BGRA32 @builtin = PIXELFORMAT_ARGB8888;
const PixelFormat PIXELFORMAT_ABGR32 @builtin = PIXELFORMAT_RGBA8888;
const PixelFormat PIXELFORMAT_RGBX32 @builtin = PIXELFORMAT_XBGR8888;
const PixelFormat PIXELFORMAT_XRGB32 @builtin = PIXELFORMAT_BGRX8888;
const PixelFormat PIXELFORMAT_BGRX32 @builtin = PIXELFORMAT_XRGB8888;
const PixelFormat PIXELFORMAT_XBGR32 @builtin = PIXELFORMAT_RGBX8888;


enum ColorType : inline CInt {
    COLOR_TYPE_UNKNOWN,
    COLOR_TYPE_RGB,
    COLOR_TYPE_YCBCR
}

enum ColorRange : inline CInt {
    COLOR_RANGE_UNKNOWN,
    COLOR_RANGE_LIMITED,
    COLOR_RANGE_FULL
}

typedef ColorPrimaries = CInt;

const ColorPrimaries COLOR_PRIMARIES_UNKNOWN @builtin      = 0;
const ColorPrimaries COLOR_PRIMARIES_BT709 @builtin        = 1;
const ColorPrimaries COLOR_PRIMARIES_UNSPECIFIED @builtin  = 2;
const ColorPrimaries COLOR_PRIMARIES_BT470M @builtin       = 4;
const ColorPrimaries COLOR_PRIMARIES_BT470BG @builtin      = 5;
const ColorPrimaries COLOR_PRIMARIES_BT601 @builtin        = 6;
const ColorPrimaries COLOR_PRIMARIES_SMPTE240 @builtin     = 7;
const ColorPrimaries COLOR_PRIMARIES_GENERIC_FILM @builtin = 8;
const ColorPrimaries COLOR_PRIMARIES_BT2020 @builtin       = 9;
const ColorPrimaries COLOR_PRIMARIES_XYZ @builtin          = 10;
const ColorPrimaries COLOR_PRIMARIES_SMPTE431 @builtin     = 11;
const ColorPrimaries COLOR_PRIMARIES_SMPTE432 @builtin     = 12;
const ColorPrimaries COLOR_PRIMARIES_EBU3213 @builtin      = 22;
const ColorPrimaries COLOR_PRIMARIES_CUSTOM @builtin       = 31;

typedef TransferCharacteristics = CInt;

const TransferCharacteristics TRANSFER_CHARACTERISTICS_UNKNOWN @builtin       = 0;
const TransferCharacteristics TRANSFER_CHARACTERISTICS_BT709 @builtin         = 1;
const TransferCharacteristics TRANSFER_CHARACTERISTICS_UNSPECIFIED @builtin   = 2;
const TransferCharacteristics TRANSFER_CHARACTERISTICS_GAMMA22 @builtin       = 4;
const TransferCharacteristics TRANSFER_CHARACTERISTICS_GAMMA28 @builtin       = 5;
const TransferCharacteristics TRANSFER_CHARACTERISTICS_BT601 @builtin         = 6;
const TransferCharacteristics TRANSFER_CHARACTERISTICS_SMPTE240 @builtin      = 7;
const TransferCharacteristics TRANSFER_CHARACTERISTICS_LINEAR @builtin        = 8;
const TransferCharacteristics TRANSFER_CHARACTERISTICS_LOG100 @builtin        = 9;
const TransferCharacteristics TRANSFER_CHARACTERISTICS_LOG100_SQRT10 @builtin = 10;
const TransferCharacteristics TRANSFER_CHARACTERISTICS_IEC61966 @builtin      = 11;
const TransferCharacteristics TRANSFER_CHARACTERISTICS_BT1361 @builtin        = 12;
const TransferCharacteristics TRANSFER_CHARACTERISTICS_SRGB @builtin          = 13;
const TransferCharacteristics TRANSFER_CHARACTERISTICS_BT2020_10BIT @builtin  = 14;
const TransferCharacteristics TRANSFER_CHARACTERISTICS_BT2020_12BIT @builtin  = 15;
const TransferCharacteristics TRANSFER_CHARACTERISTICS_PQ @builtin            = 16;
const TransferCharacteristics TRANSFER_CHARACTERISTICS_SMPTE428 @builtin      = 17;
const TransferCharacteristics TRANSFER_CHARACTERISTICS_HLG @builtin           = 18;
const TransferCharacteristics TRANSFER_CHARACTERISTICS_CUSTOM @builtin        = 31;

typedef MatrixCoefficients = CInt;

const MatrixCoefficients MATRIX_COEFFICIENTS_IDENTITY @builtin           = 0;
const MatrixCoefficients MATRIX_COEFFICIENTS_BT709 @builtin              = 1;
const MatrixCoefficients MATRIX_COEFFICIENTS_UNSPECIFIED @builtin        = 2;
const MatrixCoefficients MATRIX_COEFFICIENTS_FCC @builtin                = 4;
const MatrixCoefficients MATRIX_COEFFICIENTS_BT470BG @builtin            = 5;
const MatrixCoefficients MATRIX_COEFFICIENTS_BT601 @builtin              = 6;
const MatrixCoefficients MATRIX_COEFFICIENTS_SMPTE240 @builtin           = 7;
const MatrixCoefficients MATRIX_COEFFICIENTS_YCGCO @builtin              = 8;
const MatrixCoefficients MATRIX_COEFFICIENTS_BT2020_NCL @builtin         = 9;
const MatrixCoefficients MATRIX_COEFFICIENTS_BT2020_CL @builtin          = 10;
const MatrixCoefficients MATRIX_COEFFICIENTS_SMPTE2085 @builtin          = 11;
const MatrixCoefficients MATRIX_COEFFICIENTS_CHROMA_DERIVED_NCL @builtin = 12;
const MatrixCoefficients MATRIX_COEFFICIENTS_CHROMA_DERIVED_CL @builtin  = 13;
const MatrixCoefficients MATRIX_COEFFICIENTS_ICTCP @builtin              = 14;
const MatrixCoefficients MATRIX_COEFFICIENTS_CUSTOM @builtin             = 31;


typedef ChromaLocation = CInt;

const ChromaLocation CHROMA_LOCATION_NONE @builtin    = 0;
const ChromaLocation CHROMA_LOCATION_LEFT @builtin    = 1;
const ChromaLocation CHROMA_LOCATION_CENTER @builtin  = 2;
const ChromaLocation CHROMA_LOCATION_TOPLEFT @builtin = 3;

// TODO: a bunch color space related macros are omitted

typedef Colorspace = CInt;

const Colorspace COLORSPACE_UNKNOWN @builtin        = 0;
const Colorspace COLORSPACE_SRGB @builtin           = 0x120005a0;
const Colorspace COLORSPACE_SRGB_LINEAR @builtin    = 0x12000500;
const Colorspace COLORSPACE_HDR10 @builtin          = 0x12002600;
const Colorspace COLORSPACE_JPEG @builtin           = 0x220004c6;
const Colorspace COLORSPACE_BT601_LIMITED @builtin  = 0x211018c6;
const Colorspace COLORSPACE_BT601_FULL @builtin     = 0x221018c6;
const Colorspace COLORSPACE_BT709_LIMITED @builtin  = 0x21100421;
const Colorspace COLORSPACE_BT709_FULL @builtin     = 0x22100421;
const Colorspace COLORSPACE_BT2020_LIMITED @builtin = 0x21102609;
const Colorspace COLORSPACE_BT2020_FULL @builtin    = 0x22102609;
const Colorspace COLORSPACE_RGB_DEFAULT @builtin    = COLORSPACE_SRGB;
const Colorspace COLORSPACE_YUV_DEFAULT @builtin    = COLORSPACE_JPEG;

struct Color {
    char r;
    char g;
    char b;
    char a;
}

struct FColor {
    float r;
    float g;
    float b;
    float a;
}

struct Palette {
    int ncolors;
    Color* colors;
    uint version;
    int refcount;
}

struct PixelFormatDetails {
    PixelFormat format;
    char bits_per_pixel;
    char bytes_per_pixel;
    char[2] padding;
    uint rmask;
    uint gmask;
    uint bmask;
    uint amask;
    char rbits;
    char gbits;
    char bbits;
    char abits;
    char rshift;
    char gshift;
    char bshift;
    char ashift;
}

extern fn ZString get_pixel_format_name(PixelFormat format) @extern("SDL_GetPixelFormatName");
extern fn bool get_masks_for_pixel_format(PixelFormat format, int *bpp, uint *rmask, uint *gmask, uint *bmask, uint *amask) @extern("SDL_GetMasksForPixelFormat");
extern fn PixelFormat get_pixel_format_for_masks(int bpp, uint rmask, uint gmask, uint bmask, uint amask) @extern("SDL_GetPixelFormatForMasks");
extern fn PixelFormatDetails* get_pixel_format_details(PixelFormat format) @extern("SDL_GetPixelFormatDetails");
extern fn Palette*  create_palette(int ncolors) @extern("SDL_CreatePalette");
extern fn bool set_palette_colors(Palette* palette, Color* colors, int firstcolor, int ncolors) @extern("SDL_SetPaletteColors");
extern fn void destroy_palette(Palette* palette) @extern("SDL_DestroyPalette");
extern fn uint map_rgb(PixelFormatDetails *format, Palette* palette, char r, char g, char b) @extern("SDL_MapRGB");
extern fn uint map_rgba(PixelFormatDetails *format, Palette* palette, char r, char g, char b, char a) @extern("SDL_MapRGBA");
extern fn void get_rgb(uint pixel, PixelFormatDetails *format, Palette* palette, char *r, char *g, char *b) @extern("SDL_GetRGB");
extern fn void get_rgba(uint pixel, PixelFormatDetails *format, Palette* palette, char *r, char *g, char *b, char *a) @extern("SDL_GetRGBA");