# -*- 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 src_util import *

def getExtensionCommands (registry, iface, api, extension):
    commands = []

    # Build interface with just the single extension and no core APIs.
    # Aliases will not be set in this iface so we will use it only for
    # slicing the complete (hybrid) iface.
    extIface = getInterface(registry, api, version=False, profile='core', extensionNames=[extension])
    if not extIface.commands:
        return commands

    cmdMap = {}
    for command in iface.commands:
        cmdMap[command.name] = command

    for extCommand in extIface.commands:
        assert extCommand.name in cmdMap
        commands.append(cmdMap[extCommand.name])

    return commands

def genExtensions (registry, iface, api):
    for extName in EXTENSIONS:
        extCommands = getExtensionCommands(registry, iface, api, extName)
        if len(extCommands) == 0:
            continue # Not applicable for this api

        yield ""
        yield "if (de::contains(extSet, \"%s\"))" % extName
        yield "{"

        def genInit (command):
            ifaceName = command.alias.name if command.alias and command.name not in ALIASING_EXCEPTIONS else command.name
            return "gl->%s\t= (%s)\tloader->get(\"%s\");" % (
                getFunctionMemberName(ifaceName),
                getFunctionTypeName(ifaceName),
                command.name)

        for line in indentLines(genInit(command) for command in extCommands):
            yield "\t" + line

        yield "}"

def genExtInit (registry, iface):
    nonStrippedIface = getHybridInterface(stripAliasedExtCommands = False)

    writeInlFile(os.path.join(OPENGL_INC_DIR, "glwInitExtES.inl"), genExtensions(registry, nonStrippedIface, 'gles2'))
    writeInlFile(os.path.join(OPENGL_INC_DIR, "glwInitExtGL.inl"), genExtensions(registry, nonStrippedIface, 'gl'))

if __name__ == '__main__':
    genExtInit(getGLRegistry(), getHybridInterface())