mirror of
https://github.com/bkaradzic/bgfx.git
synced 2026-02-17 12:42:34 +01:00
396 lines
11 KiB
Lua
396 lines
11 KiB
Lua
local codegen = require "codegen"
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local idl = codegen.idl "bgfx.idl"
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local c3_template = [[
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/*
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* Copyright 2011-2026 Branimir Karadzic. All rights reserved.
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* License: https://github.com/bkaradzic/bgfx/blob/master/LICENSE
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*/
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/*
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*
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* AUTO GENERATED! DO NOT EDIT!
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*
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*/
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module bgfx;
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$types
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$funcs
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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", "char")
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elseif hasPrefix(arg.ctype, "uintptr_t") then
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return arg.ctype:gsub("uintptr_t", "uptr")
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elseif arg.ctype == "bgfx_caps_gpu_t" then
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return arg.ctype:gsub("bgfx_caps_gpu_t", "uint")
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elseif arg.ctype == "const char*" then
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return "const ZString"
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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 "..."
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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 "void*"
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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 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 = c3_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 and tmp[#tmp] ~= "" 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")
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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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local format = "0x%08x"
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local enumType = " : const uint"
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if typ.bits == 64 then
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format = "0x%016x"
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enumType = " : const ulong"
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elseif typ.bits == 16 then
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format = "0x%04x"
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enumType = " : const ushort"
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end
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yield("enum " .. typ.name .. "Flags" .. enumType)
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yield("{")
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for idx, flag in ipairs(typ.flag) do
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if flag.comment ~= nil then
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if idx ~= 1 then
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yield("")
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end
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for _, comment in ipairs(flag.comment) do
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yield("\t// " .. comment)
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end
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end
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local flagName = string.upper(flag.name)
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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(""
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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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local typ = combined[lastCombinedFlag]
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if typ then
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FlagBlock(combined[lastCombinedFlag])
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yield("")
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end
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lastCombinedFlag = nil
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end
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end
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local enum = {}
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local function convert_array(member)
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if string.find(member.array, "::") then
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return string.format("[%d]", enum[member.array])
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else
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return member.array
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end
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end
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local function convert_struct_member(member, substruct)
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local type = convert_type(member)
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local namespace = ""
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if substruct ~= nil and substruct[type] ~= nil and substruct[type].namespace ~= nil then
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namespace = substruct[type].namespace
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end
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if member.array then
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return namespace .. type .. convert_array(member) .. " " .. member.name
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else
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return namespace .. type .. " " .. member.name
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end
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end
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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("struct " .. typ.name .. " {")
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yield(" ushort idx;")
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yield("}")
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elseif hasSuffix(typ.name, "::Enum") then
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lastCombinedFlagBlock()
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local enumType = " : uint"
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if typ.bits == 64 then
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enumType = " : ulong"
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elseif typ.bits == 16 then
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enumType = " : ushort"
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end
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yield("enum " .. typ.typename .. enumType)
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yield("{")
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for idx, enum in ipairs(typ.enum) do
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if enum.comment ~= nil then
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if idx ~= 1 then
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yield("")
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end
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for _, comment in ipairs(enum.comment) do
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yield("\t// " .. comment)
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end
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end
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yield("\t" .. string.upper(enum.name) .. ",")
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end
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yield("");
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yield("\tCOUNT")
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yield("}")
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enum["[" .. typ.typename .. "::Count]"] = #typ.enum
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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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comment = flag.comment,
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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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comment = typ.comment,
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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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comment = typ.comment,
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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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if typ.comments ~= nil then
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for _, line in ipairs(typ.comments) do
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yield("// " .. line)
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end
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end
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if #typ.struct > 0 then
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if typ.namespace ~= nil then
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yield("struct " .. typ.namespace .. typ.name)
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yield("{")
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for _, member in ipairs(typ.struct) do
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if member.comment ~= nil then
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for _, line in ipairs(member.comment) do
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yield("\t// " .. line)
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end
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end
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yield(
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indent .. "\t" .. convert_struct_member(member) .. ";"
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)
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end
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yield("}")
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else
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yield("struct " .. typ.name)
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yield("{")
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for _, member in ipairs(typ.struct) do
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if member.comment ~= nil then
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for _, line in ipairs(member.comment) do
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yield("\t// " .. line)
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end
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end
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yield(
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indent .. "\t" .. convert_struct_member(member, typ.substruct) .. ";"
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)
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end
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yield("}")
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end
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else
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yield("alias " .. typ.name .. " = any;")
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end
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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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elseif func.cppinline and not func.conly then
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return
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end
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if func.comments ~= nil then
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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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for _, arg in ipairs(func.args) do
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if arg.comment ~= nil then
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local comment = table.concat(arg.comment, " ")
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yield("// "
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.. arg.name
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.. " : `"
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.. comment
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.. "`"
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)
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end
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end
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end
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local args = {}
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if func.this ~= nil then
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args[1] = func.this_type.type .. "* _this"
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end
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for _, arg in ipairs(func.args) do
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table.insert(args, convert_type(arg) .. " " .. arg.name)
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end
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yield("extern fn " .. convert_type(func.ret) .. " " .. func.cname
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.. "(" .. table.concat(args, ", ") .. ") @extern(\"bgfx_" .. func.cname .. "\");" )
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end
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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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print("Generating: " .. outputfile)
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end
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if (...) == nil then
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-- run `lua bindings-cs.lua` in command line
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print(gen.gen())
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end
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return gen
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