# -*- coding: utf-8 -*-

#-------------------------------------------------------------------------
# drawElements Quality Program utilities
# --------------------------------------
#
# Copyright 2015 The Android Open Source Project
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
#-------------------------------------------------------------------------

from egl.common import *
from khr_util.format import indentLines, commandParams, commandArgs
import khr_util.registry
from itertools import chain

try:
    from itertools import imap
except ImportError:
    imap=map

def virtualMemberDecl (command):
    return "virtual %s\t%s\t(%s) const\t= 0;" % (
        command.type,
        getFunctionMemberName(command.name),
        commandParams(command))

def concreteMemberDecl (command):
    return "%s\t%s\t(%s) const;" % (
        command.type,
        getFunctionMemberName(command.name),
        commandParams(command))

def memberImpl (command):
    template = """
{returnType} FuncPtrLibrary::{memberName} ({paramDecls}) const
{{
    {maybeReturn}m_egl.{memberName}({arguments});
}}"""
    return template.format(
        returnType = command.type,
        mangledName = getFunctionMemberName(command.name),
        paramDecls = commandParams(command),
        maybeReturn = "return " if command.type != 'void' else "",
        memberName = getFunctionMemberName(command.name),
        arguments = commandArgs(command))

def initFunctionEntry (command):
    return "dst->%s\t= (%sFunc)\tloader->get(\"%s\");" % (
        getFunctionMemberName(command.name),
        command.name,
        command.name)

def getExtOnlyIface (registry, api, extensions):
    spec = khr_util.registry.InterfaceSpec()

    for extension in registry.extensions:
        if not khr_util.registry.getExtensionName(extension) in extensions:
            continue

        if not khr_util.registry.extensionSupports(extension, api):
            continue

        spec.addExtension(extension, api)

    return khr_util.registry.createInterface(registry, spec, api)

def commandLibraryEntry (command):
    return "\t{ \"%s\",\t(deFunctionPtr)%s }," % (command.name, command.name)

def genStaticLibrary (registry):
    genCommandLists(registry, commandLibraryEntry,
                    check = lambda api, version: api == 'egl' and version in set(["1.4", "1.5"]),
                    directory = EGL_WRAPPER_DIR,
                    filePattern = "eglwStaticLibrary%s.inl",
                    align = True)

def gen (registry):
    defaultIface = getDefaultInterface()
    noExtIface = getInterface(registry, 'egl', VERSION)
    extOnlyIface = getExtOnlyIface(registry, 'egl', EXTENSIONS)

    genCommandList(defaultIface, virtualMemberDecl, EGL_WRAPPER_DIR, "eglwLibrary.inl", True)
    genCommandList(defaultIface, concreteMemberDecl, EGL_WRAPPER_DIR, "eglwFuncPtrLibraryDecl.inl", True)
    genCommandList(defaultIface, memberImpl, EGL_WRAPPER_DIR, "eglwFuncPtrLibraryImpl.inl")

    genCommandList(noExtIface, initFunctionEntry, EGL_WRAPPER_DIR, "eglwInitCore.inl", True)
    genCommandList(extOnlyIface, initFunctionEntry, EGL_WRAPPER_DIR, "eglwInitExtensions.inl", True)

    genStaticLibrary(registry)