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      1 # Copyright 2014 The Chromium Authors. All rights reserved.
      2 # Use of this source code is governed by a BSD-style license that can be
      3 # found in the LICENSE file.
      4 
      5 assert(is_win)
      6 
      7 import("//build/config/win/visual_studio_version.gni")
      8 
      9 # This template defines a rule to invoke the MS IDL compiler.
     10 #
     11 # Parameters
     12 #
     13 #   sources
     14 #      List of .idl file to process.
     15 #
     16 #   out_dir (optional)
     17 #       Directory to write the generated files to. Defaults to target_gen_dir.
     18 #
     19 #   visibility (optional)
     20 
     21 template("midl") {
     22   action_name = "${target_name}_idl_action"
     23   source_set_name = target_name
     24 
     25   assert(defined(invoker.sources), "Source must be defined for $target_name")
     26 
     27   if (defined(invoker.out_dir)) {
     28     out_dir = invoker.out_dir
     29   } else {
     30     out_dir = target_gen_dir
     31   }
     32 
     33   header_file = "{{source_name_part}}.h"
     34   dlldata_file = "{{source_name_part}}.dlldata.c"
     35   interface_identifier_file = "{{source_name_part}}_i.c"
     36   proxy_file = "{{source_name_part}}_p.c"
     37   type_library_file = "{{source_name_part}}.tlb"
     38 
     39   action_foreach(action_name) {
     40     visibility = [ ":$source_set_name" ]
     41 
     42     # This functionality is handled by the win-tool because the GYP build has
     43     # MIDL support built-in.
     44     # TODO(brettw) move this to a separate MIDL wrapper script for better
     45     # clarity once GYP support is not needed.
     46     script = "$root_build_dir/gyp-win-tool"
     47 
     48     sources = invoker.sources
     49 
     50     # Note that .tlb is not included in the outputs as it is not always
     51     # generated depending on the content of the input idl file.
     52     outputs = [
     53       "$out_dir/$header_file",
     54       "$out_dir/$dlldata_file",
     55       "$out_dir/$interface_identifier_file",
     56       "$out_dir/$proxy_file",
     57     ]
     58 
     59     if (cpu_arch == "x86") {
     60       win_tool_arch = "environment.x86"
     61       idl_target_platform = "win32"
     62     } else if (cpu_arch == "x64") {
     63       win_tool_arch = "environment.x64"
     64       idl_target_platform = "x64"
     65     } else {
     66       assert(false, "Need environment for this arch")
     67     }
     68 
     69     args = [
     70       "midl-wrapper", win_tool_arch,
     71       rebase_path(out_dir, root_build_dir),
     72       type_library_file,
     73       header_file,
     74       dlldata_file,
     75       interface_identifier_file,
     76       proxy_file,
     77       "{{source}}",
     78       "/char", "signed",
     79       "/env", idl_target_platform,
     80       "/Oicf",
     81     ]
     82 
     83     foreach(include, system_include_dirs) {
     84       args += [ "/I", include ]
     85     }
     86   }
     87 
     88   source_set(target_name) {
     89     if (defined(invoker.visibility)) {
     90       visibility = invoker.visibility
     91     }
     92 
     93     # We only compile the IID files from the IDL tool rather than all outputs.
     94     sources = process_file_template(
     95         invoker.sources,
     96         [ "$out_dir/$interface_identifier_file" ])
     97 
     98     deps = [ ":$action_name" ]
     99   }
    100 }
    101