zenolith-sdl2/src/ffi.zig

pub const c = @cImport({
    @cInclude("SDL2/SDL.h");
    @cInclude("freetype/freetype.h");
});

// This error union as well as the handleFTError function has been kindly involuntarily donated
// by the awesome mach-freetype library.
pub const FreeTypeError = error{
    CannotOpenResource,
    UnknownFileFormat,
    InvalidFileFormat,
    InvalidVersion,
    LowerModuleVersion,
    InvalidArgument,
    UnimplementedFeature,
    InvalidTable,
    InvalidOffset,
    ArrayTooLarge,
    MissingModule,
    MissingProperty,
    InvalidGlyphIndex,
    InvalidCharacterCode,
    InvalidGlyphFormat,
    CannotRenderGlyph,
    InvalidOutline,
    InvalidComposite,
    TooManyHints,
    InvalidPixelSize,
    InvalidHandle,
    InvalidLibraryHandle,
    InvalidDriverHandle,
    InvalidFaceHandle,
    InvalidSizeHandle,
    InvalidSlotHandle,
    InvalidCharMapHandle,
    InvalidCacheHandle,
    InvalidStreamHandle,
    TooManyDrivers,
    TooManyExtensions,
    OutOfMemory,
    UnlistedObject,
    CannotOpenStream,
    InvalidStreamSeek,
    InvalidStreamSkip,
    InvalidStreamRead,
    InvalidStreamOperation,
    InvalidFrameOperation,
    NestedFrameAccess,
    InvalidFrameRead,
    RasterUninitialized,
    RasterCorrupted,
    RasterOverflow,
    RasterNegativeHeight,
    TooManyCaches,
    InvalidOpcode,
    TooFewArguments,
    StackOverflow,
    CodeOverflow,
    BadArgument,
    DivideByZero,
    InvalidReference,
    DebugOpCode,
    ENDFInExecStream,
    NestedDEFS,
    InvalidCodeRange,
    ExecutionTooLong,
    TooManyFunctionDefs,
    TooManyInstructionDefs,
    TableMissing,
    HorizHeaderMissing,
    LocationsMissing,
    NameTableMissing,
    CMapTableMissing,
    HmtxTableMissing,
    PostTableMissing,
    InvalidHorizMetrics,
    InvalidCharMapFormat,
    InvalidPPem,
    InvalidVertMetrics,
    CouldNotFindContext,
    InvalidPostTableFormat,
    InvalidPostTable,
    Syntax,
    StackUnderflow,
    Ignore,
    NoUnicodeGlyphName,
    MissingStartfontField,
    MissingFontField,
    MissingSizeField,
    MissingFontboundingboxField,
    MissingCharsField,
    MissingStartcharField,
    MissingEncodingField,
    MissingBbxField,
    BbxTooBig,
    CorruptedFontHeader,
    CorruptedFontGlyphs,
};

pub fn handleFTError(err: c_int) FreeTypeError!void {
    return switch (err) {
        c.FT_Err_Ok => {},
        c.FT_Err_Cannot_Open_Resource => error.CannotOpenResource,
        c.FT_Err_Unknown_File_Format => error.UnknownFileFormat,
        c.FT_Err_Invalid_File_Format => error.InvalidFileFormat,
        c.FT_Err_Invalid_Version => error.InvalidVersion,
        c.FT_Err_Lower_Module_Version => error.LowerModuleVersion,
        c.FT_Err_Invalid_Argument => error.InvalidArgument,
        c.FT_Err_Unimplemented_Feature => error.UnimplementedFeature,
        c.FT_Err_Invalid_Table => error.InvalidTable,
        c.FT_Err_Invalid_Offset => error.InvalidOffset,
        c.FT_Err_Array_Too_Large => error.ArrayTooLarge,
        c.FT_Err_Missing_Module => error.MissingModule,
        c.FT_Err_Missing_Property => error.MissingProperty,
        c.FT_Err_Invalid_Glyph_Index => error.InvalidGlyphIndex,
        c.FT_Err_Invalid_Character_Code => error.InvalidCharacterCode,
        c.FT_Err_Invalid_Glyph_Format => error.InvalidGlyphFormat,
        c.FT_Err_Cannot_Render_Glyph => error.CannotRenderGlyph,
        c.FT_Err_Invalid_Outline => error.InvalidOutline,
        c.FT_Err_Invalid_Composite => error.InvalidComposite,
        c.FT_Err_Too_Many_Hints => error.TooManyHints,
        c.FT_Err_Invalid_Pixel_Size => error.InvalidPixelSize,
        c.FT_Err_Invalid_Handle => error.InvalidHandle,
        c.FT_Err_Invalid_Library_Handle => error.InvalidLibraryHandle,
        c.FT_Err_Invalid_Driver_Handle => error.InvalidDriverHandle,
        c.FT_Err_Invalid_Face_Handle => error.InvalidFaceHandle,
        c.FT_Err_Invalid_Size_Handle => error.InvalidSizeHandle,
        c.FT_Err_Invalid_Slot_Handle => error.InvalidSlotHandle,
        c.FT_Err_Invalid_CharMap_Handle => error.InvalidCharMapHandle,
        c.FT_Err_Invalid_Cache_Handle => error.InvalidCacheHandle,
        c.FT_Err_Invalid_Stream_Handle => error.InvalidStreamHandle,
        c.FT_Err_Too_Many_Drivers => error.TooManyDrivers,
        c.FT_Err_Too_Many_Extensions => error.TooManyExtensions,
        c.FT_Err_Out_Of_Memory => error.OutOfMemory,
        c.FT_Err_Unlisted_Object => error.UnlistedObject,
        c.FT_Err_Cannot_Open_Stream => error.CannotOpenStream,
        c.FT_Err_Invalid_Stream_Seek => error.InvalidStreamSeek,
        c.FT_Err_Invalid_Stream_Skip => error.InvalidStreamSkip,
        c.FT_Err_Invalid_Stream_Read => error.InvalidStreamRead,
        c.FT_Err_Invalid_Stream_Operation => error.InvalidStreamOperation,
        c.FT_Err_Invalid_Frame_Operation => error.InvalidFrameOperation,
        c.FT_Err_Nested_Frame_Access => error.NestedFrameAccess,
        c.FT_Err_Invalid_Frame_Read => error.InvalidFrameRead,
        c.FT_Err_Raster_Uninitialized => error.RasterUninitialized,
        c.FT_Err_Raster_Corrupted => error.RasterCorrupted,
        c.FT_Err_Raster_Overflow => error.RasterOverflow,
        c.FT_Err_Raster_Negative_Height => error.RasterNegativeHeight,
        c.FT_Err_Too_Many_Caches => error.TooManyCaches,
        c.FT_Err_Invalid_Opcode => error.InvalidOpcode,
        c.FT_Err_Too_Few_Arguments => error.TooFewArguments,
        c.FT_Err_Stack_Overflow => error.StackOverflow,
        c.FT_Err_Code_Overflow => error.CodeOverflow,
        c.FT_Err_Bad_Argument => error.BadArgument,
        c.FT_Err_Divide_By_Zero => error.DivideByZero,
        c.FT_Err_Invalid_Reference => error.InvalidReference,
        c.FT_Err_Debug_OpCode => error.DebugOpCode,
        c.FT_Err_ENDF_In_Exec_Stream => error.ENDFInExecStream,
        c.FT_Err_Nested_DEFS => error.NestedDEFS,
        c.FT_Err_Invalid_CodeRange => error.InvalidCodeRange,
        c.FT_Err_Execution_Too_Long => error.ExecutionTooLong,
        c.FT_Err_Too_Many_Function_Defs => error.TooManyFunctionDefs,
        c.FT_Err_Too_Many_Instruction_Defs => error.TooManyInstructionDefs,
        c.FT_Err_Table_Missing => error.TableMissing,
        c.FT_Err_Horiz_Header_Missing => error.HorizHeaderMissing,
        c.FT_Err_Locations_Missing => error.LocationsMissing,
        c.FT_Err_Name_Table_Missing => error.NameTableMissing,
        c.FT_Err_CMap_Table_Missing => error.CMapTableMissing,
        c.FT_Err_Hmtx_Table_Missing => error.HmtxTableMissing,
        c.FT_Err_Post_Table_Missing => error.PostTableMissing,
        c.FT_Err_Invalid_Horiz_Metrics => error.InvalidHorizMetrics,
        c.FT_Err_Invalid_CharMap_Format => error.InvalidCharMapFormat,
        c.FT_Err_Invalid_PPem => error.InvalidPPem,
        c.FT_Err_Invalid_Vert_Metrics => error.InvalidVertMetrics,
        c.FT_Err_Could_Not_Find_Context => error.CouldNotFindContext,
        c.FT_Err_Invalid_Post_Table_Format => error.InvalidPostTableFormat,
        c.FT_Err_Invalid_Post_Table => error.InvalidPostTable,
        c.FT_Err_Syntax_Error => error.Syntax,
        c.FT_Err_Stack_Underflow => error.StackUnderflow,
        c.FT_Err_Ignore => error.Ignore,
        c.FT_Err_No_Unicode_Glyph_Name => error.NoUnicodeGlyphName,
        c.FT_Err_Missing_Startfont_Field => error.MissingStartfontField,
        c.FT_Err_Missing_Font_Field => error.MissingFontField,
        c.FT_Err_Missing_Size_Field => error.MissingSizeField,
        c.FT_Err_Missing_Fontboundingbox_Field => error.MissingFontboundingboxField,
        c.FT_Err_Missing_Chars_Field => error.MissingCharsField,
        c.FT_Err_Missing_Startchar_Field => error.MissingStartcharField,
        c.FT_Err_Missing_Encoding_Field => error.MissingEncodingField,
        c.FT_Err_Missing_Bbx_Field => error.MissingBbxField,
        c.FT_Err_Bbx_Too_Big => error.BbxTooBig,
        c.FT_Err_Corrupted_Font_Header => error.CorruptedFontHeader,
        c.FT_Err_Corrupted_Font_Glyphs => error.CorruptedFontGlyphs,
        else => unreachable,
    };
}