338 lines
7.4 KiB
Lua
338 lines
7.4 KiB
Lua
local codegen = require "codegen"
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local idl = codegen.idl "bgfx.idl"
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local csharp_template = [[
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using System;
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using System.Runtime.InteropServices;
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using System.Security;
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internal struct bgfx
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{
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$types
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$funcs
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#if DEBUG
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const string DllName = "bgfx_debug.dll";
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#else
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const string DllName = "bgfx.dll";
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#endif
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}
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]]
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local function hasPrefix(str, prefix)
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return prefix == "" or str:sub(1, #prefix) == prefix
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end
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local function hasSuffix(str, suffix)
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return suffix == "" or str:sub(-#suffix) == suffix
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end
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local function convert_type_0(arg)
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if hasPrefix(arg.ctype, "uint64_t") then
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return arg.ctype:gsub("uint64_t", "ulong")
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elseif hasPrefix(arg.ctype, "int64_t") then
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return arg.ctype:gsub("int64_t", "long")
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elseif hasPrefix(arg.ctype, "uint32_t") then
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return arg.ctype:gsub("uint32_t", "uint")
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elseif hasPrefix(arg.ctype, "int32_t") then
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return arg.ctype:gsub("int32_t", "int")
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elseif hasPrefix(arg.ctype, "uint16_t") then
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return arg.ctype:gsub("uint16_t", "ushort")
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elseif hasPrefix(arg.ctype, "bgfx_view_id_t") then
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return arg.ctype:gsub("bgfx_view_id_t", "ushort")
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elseif hasPrefix(arg.ctype, "uint8_t") then
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return arg.ctype:gsub("uint8_t", "byte")
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elseif hasPrefix(arg.ctype, "uintptr_t") then
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return arg.ctype:gsub("uintptr_t", "UIntPtr")
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elseif arg.ctype == "const char*" then
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return "[MarshalAs(UnmanagedType.LPStr)] string"
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elseif hasSuffix(arg.fulltype, "Handle") then
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return arg.fulltype
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elseif arg.ctype == "..." then
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return "[MarshalAs(UnmanagedType.LPStr)] string args"
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elseif arg.ctype == "va_list"
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or arg.fulltype == "bx::AllocatorI*"
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or arg.fulltype == "CallbackI*"
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or arg.fulltype == "ReleaseFn" then
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return "IntPtr"
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elseif arg.fulltype == "const ViewId*" then
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return "ushort*"
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end
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return arg.fulltype
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end
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local function convert_type(arg)
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local ctype = convert_type_0(arg)
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ctype = ctype:gsub("::Enum", "")
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ctype = ctype:gsub("const ", "")
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ctype = ctype:gsub(" &", "*")
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ctype = ctype:gsub("&", "*")
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return ctype
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end
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local function convert_ret_type(arg)
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local ctype = convert_type(arg)
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if hasPrefix(ctype, "[MarshalAs(UnmanagedType.LPStr)]") then
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return "string"
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end
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return ctype
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end
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local converter = {}
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local yield = coroutine.yield
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local indent = ""
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local gen = {}
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function gen.gen()
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local r = csharp_template:gsub("$(%l+)", function(what)
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local tmp = {}
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for _, object in ipairs(idl[what]) do
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local co = coroutine.create(converter[what])
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local any
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while true do
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local ok, v = coroutine.resume(co, object)
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assert(ok, debug.traceback(co, v))
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if not v then
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break
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end
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table.insert(tmp, v)
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any = true
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end
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if any then
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table.insert(tmp, "")
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end
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end
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return table.concat(tmp, "\n\t")
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end)
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return r
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end
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local combined = { "State", "Stencil", "Buffer", "Texture", "Sampler", "Reset" }
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for _, v in ipairs(combined) do
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combined[v] = {}
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end
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local lastCombinedFlag
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local function FlagBlock(typ)
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if typ == nil then
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return
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end
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local format = "0x%08x"
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local enumType = " : uint"
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if typ.bits == 64 then
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format = "0x%016x"
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enumType = " : ulong"
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elseif typ.bits == 16 then
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format = "0x%04x"
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enumType = " : ushort"
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end
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yield("[Flags]")
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yield("public enum " .. typ.name .. "Flags" .. enumType)
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yield("{")
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for _, flag in ipairs(typ.flag) do
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local flagName = flag.name:gsub("_", "")
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yield("\t"
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.. flagName
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.. string.rep(" ", 22 - #(flagName))
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.. " = "
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.. string.format(flag.format or format, flag.value)
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.. ","
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)
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end
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if typ.shift then
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yield("\t"
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.. "Shift"
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.. string.rep(" ", 22 - #("Shift"))
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.. " = "
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.. flag.shift
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)
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end
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-- generate Mask
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if typ.mask then
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yield("\t"
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.. "Mask"
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.. string.rep(" ", 22 - #("Mask"))
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.. " = "
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.. string.format(format, flag.mask)
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)
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end
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yield("}")
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end
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local function lastCombinedFlagBlock()
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if lastCombinedFlag then
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FlagBlock(combined[lastCombinedFlag])
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lastCombinedFlag = nil
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end
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end
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local namespace = ""
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function converter.types(typ)
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if typ.handle then
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lastCombinedFlagBlock()
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yield("public struct " .. typ.name .. "{ public ushort idx; }")
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elseif hasSuffix(typ.name, "::Enum") then
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lastCombinedFlagBlock()
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yield("public enum " .. typ.typename)
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yield("{")
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for _, enum in ipairs(typ.enum) do
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yield("\t" .. enum.name .. ",")
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end
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yield("}")
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elseif typ.bits ~= nil then
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local prefix, name = typ.name:match "(%u%l+)(.*)"
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if prefix ~= lastCombinedFlag then
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lastCombinedFlagBlock()
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lastCombinedFlag = prefix
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end
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local combinedFlag = combined[prefix]
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if combinedFlag then
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combinedFlag.bits = typ.bits
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combinedFlag.name = prefix
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local flags = combinedFlag.flag or {}
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combinedFlag.flag = flags
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local lookup = combinedFlag.lookup or {}
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combinedFlag.lookup = lookup
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for _, flag in ipairs(typ.flag) do
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local flagName = name .. flag.name:gsub("_", "")
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local value = flag.value
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if value == nil then
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-- It's a combined flag
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value = 0
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for _, v in ipairs(flag) do
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value = value | assert(lookup[name .. v], v .. " is not defined for " .. flagName)
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end
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end
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lookup[flagName] = value
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table.insert(flags, {
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name = flagName,
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value = value,
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})
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end
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if typ.shift then
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table.insert(flags, {
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name = name .. "Shift",
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value = typ.shift,
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format = "%d",
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})
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end
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if typ.mask then
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-- generate Mask
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table.insert(flags, {
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name = name .. "Mask",
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value = typ.mask,
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})
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lookup[name .. "Mask"] = typ.mask
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end
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else
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FlagBlock(typ)
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end
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elseif typ.struct ~= nil then
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local skip = false
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if typ.namespace ~= nil then
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if namespace ~= typ.namespace then
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yield("public unsafe struct " .. typ.namespace)
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yield("{")
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namespace = typ.namespace
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indent = "\t"
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end
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elseif namespace ~= "" then
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indent = ""
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namespace = ""
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skip = true
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end
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if not skip then
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yield(indent .. "public unsafe struct " .. typ.name)
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yield(indent .. "{")
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end
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for _, member in ipairs(typ.struct) do
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yield(
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indent .. "\tpublic " .. convert_type(member) .. " " .. member.name .. ";"
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)
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end
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yield(indent .. "}")
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end
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end
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function converter.funcs(func)
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if func.cpponly then
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return
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end
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if func.comments ~= nil then
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yield("/// <summary>")
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for _, line in ipairs(func.comments) do
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yield("/// " .. line)
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end
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yield("/// </summary>")
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end
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yield("[DllImport(DllName, EntryPoint=\"bgfx_" .. func.cname .. "\", CallingConvention = CallingConvention.Cdecl)]")
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if func.ret.cpptype == "bool" then
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yield("[return: MarshalAs(UnmanagedType.I1)]")
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elseif func.ret.cpptype == "const char*" then
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yield("[return: MarshalAs(UnmanagedType.LPStr)]")
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end
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local first = ""
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local args = "("
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if func.this ~= nil then
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local thisType = func.this:gsub("const ", "")
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if thisType == "bgfx_encoder_t*" then
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thisType = "Encoder*"
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elseif thisType == "bgfx_attachment_t*" then
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thisType = "Attachment*"
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elseif thisType == "bgfx_vertex_decl_t*" then
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thisType = "VertexDecl*"
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end
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args = args .. thisType .. " " .. "_this"
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first = ", "
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end
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for _, arg in ipairs(func.args) do
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local argtype = convert_type(arg)
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args = args .. first .. argtype .. " " .. arg.name
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first = ", "
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end
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yield("internal static extern unsafe " .. convert_ret_type(func.ret) .. " " .. func.cname .. args .. ");")
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end
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-- printtable("idl types", idl.types)
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-- printtable("idl funcs", idl.funcs)
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function gen.write(codes, outputfile)
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local out = assert(io.open(outputfile, "wb"))
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out:write(codes)
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out:close()
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end
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return gen
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