118 lines
4.3 KiB
Python
118 lines
4.3 KiB
Python
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#!/usr/bin/env python2
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# Copyright 2019 The Dawn Authors
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import os, sys
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from collections import namedtuple
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import xml.etree.ElementTree as etree
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from generator_lib import Generator, run_generator, FileRender
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class Proc:
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def __init__(self, gl_name, proc_name=None):
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assert(gl_name.startswith('gl'))
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if proc_name == None:
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proc_name = gl_name[2:]
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self.gl_name = gl_name
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self.proc_name = proc_name
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def glProcName(self):
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return self.gl_name
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def ProcName(self):
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return self.proc_name
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def PFNPROCNAME(self):
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return 'PFN' + self.gl_name.upper() + 'PROC'
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def __repr__(self):
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return 'Proc("{}", "{}")'.format(self.gl_name, self.proc_name)
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Version = namedtuple('Version', ['major', 'minor'])
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VersionProcBlock = namedtuple('ProcBlock', ['version', 'procs'])
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HeaderProcBlock = namedtuple('ProcBlock', ['description', 'procs'])
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def parse_version(version):
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return Version(*map(int, version.split('.')))
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def compute_params(root):
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# Add proc blocks for OpenGL ES
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gles_blocks = []
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for gles_section in root.findall('''feature[@api='gles2']'''):
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section_procs = []
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for proc in gles_section.findall('./require/command'):
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section_procs.append(Proc(proc.attrib['name']))
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gles_blocks.append(VersionProcBlock(parse_version(gles_section.attrib['number']), section_procs))
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# Get the list of all Desktop OpenGL function removed by the Core Profile.
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core_removed_procs = set()
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for removed_section in root.findall('feature/remove'):
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assert(removed_section.attrib['profile'] == 'core')
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for proc in removed_section.findall('./command'):
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core_removed_procs.add(proc.attrib['name'])
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# Add proc blocks for Desktop GL
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desktop_gl_blocks = []
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for gl_section in root.findall('''feature[@api='gl']'''):
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section_procs = []
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for proc in gl_section.findall('./require/command'):
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if proc.attrib['name'] not in core_removed_procs:
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section_procs.append(Proc(proc.attrib['name']))
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desktop_gl_blocks.append(VersionProcBlock(parse_version(gl_section.attrib['number']), section_procs))
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already_added_header_procs = set()
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header_blocks = []
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def add_header_block(description, procs):
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block_procs = []
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for proc in procs:
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if not proc.glProcName() in already_added_header_procs:
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already_added_header_procs.add(proc.glProcName())
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block_procs.append(proc)
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if len(block_procs) > 0:
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header_blocks.append(HeaderProcBlock(description, block_procs))
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for block in gles_blocks:
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add_header_block('OpenGL ES {}.{}'.format(block.version.major, block.version.minor), block.procs)
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for block in desktop_gl_blocks:
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add_header_block('Desktop OpenGL {}.{}'.format(block.version.major, block.version.minor), block.procs)
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return {
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'gles_blocks': gles_blocks,
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'desktop_gl_blocks': desktop_gl_blocks,
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'header_blocks': header_blocks,
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}
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class OpenGLLoaderGenerator(Generator):
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def get_description(self):
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return 'Generates code to load OpenGL function pointers'
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def add_commandline_arguments(self, parser):
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parser.add_argument('--gl-xml', required=True, type=str, help ='The Khronos gl.xml to use.')
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def get_file_renders(self, args):
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params = compute_params(etree.parse(args.gl_xml).getroot())
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return [
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FileRender('opengl/OpenGLFunctionsBase.cpp', 'dawn_native/opengl/OpenGLFunctionsBase_autogen.cpp', [params]),
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FileRender('opengl/OpenGLFunctionsBase.h', 'dawn_native/opengl/OpenGLFunctionsBase_autogen.h', [params]),
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]
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def get_dependencies(self, args):
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return [os.path.abspath(args.gl_xml)]
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if __name__ == '__main__':
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sys.exit(run_generator(OpenGLLoaderGenerator()))
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