scripts/opengl/gen_wrapper.py

   1 # -*- coding: utf-8 -*-
   2
   3 import os
   4 from src_util import *
   5 from itertools import imap, chain
   6
   7 def getMangledName (funcName):
   8         assert funcName[:2] == "gl"
   9         return "glw" + funcName[2:]
  10
  11 def commandAliasDefinition (command):
  12         return "#define\t%s\t%s" % (command.name, getMangledName(command.name))
  13
  14 def commandWrapperDeclaration (command):
  15         return "%s\t%s\t(%s);" % (
  16                 command.type,
  17                 getMangledName(command.name),
  18                 ", ".join([param.declaration for param in command.params]))
  19
  20 def genWrapperHeader (iface):
  21         defines = imap(commandAliasDefinition, iface.commands)
  22         prototypes = imap(commandWrapperDeclaration, iface.commands)
  23         src = indentLines(chain(defines, prototypes))
  24         writeInlFile(os.path.join(OPENGL_INC_DIR, "glwApi.inl"), src)
  25
  26 def getDefaultReturn (command):
  27         if command.name == "glGetError":
  28                 return "GL_INVALID_OPERATION"
  29         else:
  30                 assert command.type != 'void'
  31                 return "(%s)0" % command.type
  32
  33 def commandWrapperDefinition (command):
  34         template = """
  35 {returnType} {mangledName} ({paramDecls})
  36 {{
  37         const glw::Functions* gl = glw::getCurrentThreadFunctions();
  38         if (!gl)
  39                 return{defaultReturn};
  40         {maybeReturn}gl->{memberName}({arguments});
  41 }}"""
  42         return template.format(
  43                 returnType              = command.type,
  44                 mangledName             = getMangledName(command.name),
  45                 paramDecls              = commandParams(command),
  46                 defaultReturn   = " " + getDefaultReturn(command) if command.type != 'void' else "",
  47                 maybeReturn             = "return " if command.type != 'void' else "",
  48                 memberName              = getFunctionMemberName(command.name),
  49                 arguments               = commandArgs(command))
  50
  51 def genWrapperImplementation (iface):
  52         genCommandList(iface, commandWrapperDefinition, OPENGL_INC_DIR, "glwImpl.inl")
  53
  54 def genWrapper (iface):
  55         genWrapperHeader(iface)
  56         genWrapperImplementation(iface)
  57
  58 if __name__ == "__main__":
  59         genWrapper(getHybridInterface())