angle/scripts/gen_gl_enum_utils.py

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9.1 KiB
Python
Исходник Обычный вид История

#!/usr/bin/python
#
# Copyright 2019 The ANGLE Project Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
#
# gen_gl_enum_utils.py:
# Generates GLenum value to string mapping for ANGLE
# NOTE: don't run this script directly. Run scripts/run_code_generation.py.
import sys
import os
from datetime import date
import registry_xml
template_gl_enums_header = """// GENERATED FILE - DO NOT EDIT.
// Generated by {script_name} using data from {data_source_name}.
//
// Copyright {year} The ANGLE Project Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//
// gl_enum_utils_autogen.h:
// mapping of GLenum value to string.
# ifndef LIBANGLE_GL_ENUM_UTILS_AUTOGEN_H_
# define LIBANGLE_GL_ENUM_UTILS_AUTOGEN_H_
#include <string>
#include <ostream>
#include "common/PackedGLEnums_autogen.h"
namespace gl
{{
enum class GLenumGroup {{
{gl_enum_groups}
}};
const char *GLbooleanToString(unsigned int value);
const char *GLenumToString(GLenumGroup enumGroup, unsigned int value);
std::string GLbitfieldToString(GLenumGroup enumGroup, unsigned int value);
void OutputGLenumString(std::ostream &out, GLenumGroup enumGroup, unsigned int value);
void OutputGLbitfieldString(std::ostream &out, GLenumGroup enumGroup, unsigned int value);
}}
# endif // LIBANGLE_GL_ENUM_UTILS_AUTOGEN_H_
"""
template_gl_enums_source = """// GENERATED FILE - DO NOT EDIT.
// Generated by {script_name} using data from {data_source_name}.
//
// Copyright {year} The ANGLE Project Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//
// gl_enum_utils_autogen.cpp:
// mapping of GLenum value to string.
#include "libANGLE/gl_enum_utils_autogen.h"
#include <sstream>
#include "common/bitset_utils.h"
namespace gl
{{
namespace
{{
constexpr char kEnumUnknown[] = "EnumUnknown";
}} // anonymous namespace
void OutputGLenumString(std::ostream &out, GLenumGroup enumGroup, unsigned int value)
{{
const char *enumStr = GLenumToString(enumGroup, value);
if (enumStr != kEnumUnknown)
{{
out << enumStr;
}}
else
{{
out << std::hex << value << std::dec;
}}
}}
void OutputGLbitfieldString(std::ostream &out, GLenumGroup enumGroup, unsigned int value)
{{
out << GLbitfieldToString(enumGroup, value);
}}
const char *GLbooleanToString(unsigned int value) {{
switch (value) {{
case 0x0:
return "GL_FALSE";
case 0x1:
return "GL_TRUE";
default:
return kEnumUnknown;
}}
}}
const char *GLenumToString(GLenumGroup enumGroup, unsigned int value) {{
switch (enumGroup) {{
{gl_enums_value_to_string_table}
default:
return kEnumUnknown;
}}
}}
std::string GLbitfieldToString(GLenumGroup enumGroup, unsigned int value) {{
std::stringstream st;
const angle::BitSet<32> bitSet(value);
bool first = true;
for (const auto index : bitSet)
{{
if (!first)
{{
st << " | ";
}}
first = false;
unsigned int mask = 1u << index;
OutputGLenumString(st, enumGroup, mask);
}}
return st.str();
}}
}}
"""
template_enum_group_case = """case GLenumGroup::{group_name}: {{
switch (value) {{
{inner_group_cases}
default:
return kEnumUnknown;
}}
}}
"""
template_enum_value_to_string_case = """case {value}: return {name};"""
exclude_gl_enums = {
'GL_NO_ERROR', 'GL_TIMEOUT_IGNORED', 'GL_INVALID_INDEX', 'GL_VERSION_ES_CL_1_0',
'GL_VERSION_ES_CM_1_1', 'GL_VERSION_ES_CL_1_1'
}
exclude_gl_enum_groups = {'SpecialNumbers'}
def dump_value_to_string_mapping(gl_enum_in_groups, exporting_enums):
exporting_groups = list()
for group_name, inner_mapping in gl_enum_in_groups.iteritems():
string_value_pairs = list(
filter(lambda x: x[0] in exporting_enums, inner_mapping.iteritems()))
if not string_value_pairs:
continue
# sort according values
string_value_pairs.sort(key=lambda x: (x[1], x[0]))
# remove all duplicate values from the pairs list
# some value may have more than one GLenum mapped to them, such as:
# GL_DRAW_FRAMEBUFFER_BINDING and GL_FRAMEBUFFER_BINDING
# GL_BLEND_EQUATION_RGB and GL_BLEND_EQUATION
# it is safe to output either one of them, for simplity here just
# choose the shorter one which comes first in the sorted list
exporting_string_value_pairs = list()
for index, pair in enumerate(string_value_pairs):
if index == 0 or pair[1] != string_value_pairs[index - 1][1]:
exporting_string_value_pairs.append(pair)
inner_code_block = "\n".join([
template_enum_value_to_string_case.format(
value=hex(value),
name='"%s"' % name,
) for name, value in exporting_string_value_pairs
])
exporting_groups.append((group_name, inner_code_block))
return "\n".join([
template_enum_group_case.format(
group_name=group_name,
inner_group_cases=inner_code_block,
) for group_name, inner_code_block in sorted(exporting_groups, key=lambda x: x[0])
])
def main(header_output_path, source_output_path):
xml = registry_xml.RegistryXML('gl.xml', 'gl_angle_ext.xml')
# build a map from GLenum name to its value
all_gl_enums = dict()
for enums_node in xml.root.findall('enums'):
for enum in enums_node.findall('enum'):
name = enum.attrib['name']
value = int(enum.attrib['value'], base=16)
all_gl_enums[name] = value
# Parse groups of GLenums to build a {group, name} -> value mapping.
gl_enum_in_groups = dict()
enums_has_group = set()
for enums_group_node in xml.root.findall('groups/group'):
group_name = enums_group_node.attrib['name']
if group_name in exclude_gl_enum_groups:
continue
if group_name not in gl_enum_in_groups:
gl_enum_in_groups[group_name] = dict()
for enum_node in enums_group_node.findall('enum'):
enum_name = enum_node.attrib['name']
enums_has_group.add(enum_name)
gl_enum_in_groups[group_name][enum_name] = all_gl_enums[enum_name]
# Find relevant GLenums according to enabled APIs and extensions.
exporting_enums = set()
# export all the apis
xpath = "./feature/require/enum"
for enum_tag in xml.root.findall(xpath):
enum_name = enum_tag.attrib['name']
if enum_name not in exclude_gl_enums:
exporting_enums.add(enum_name)
for extension in registry_xml.supported_extensions:
xpath = "./extensions/extension[@name='%s']/require/enum" % extension
for enum_tag in xml.root.findall(xpath):
enum_name = enum_tag.attrib['name']
if enum_name not in exclude_gl_enums:
exporting_enums.add(enum_name)
# For enums that do not have a group, add them to a default group
default_group_name = registry_xml.default_enum_group_name
gl_enum_in_groups[default_group_name] = dict()
default_group = gl_enum_in_groups[default_group_name]
for enum_name in exporting_enums:
if enum_name not in enums_has_group:
default_group[enum_name] = all_gl_enums[enum_name]
# Write GLenum groups into the header file.
header_content = template_gl_enums_header.format(
script_name=os.path.basename(sys.argv[0]),
data_source_name="gl.xml and gl_angle_ext.xml",
year=date.today().year,
gl_enum_groups=',\n'.join(sorted(gl_enum_in_groups.iterkeys())))
header_output_path = registry_xml.script_relative(header_output_path)
with open(header_output_path, 'w') as f:
f.write(header_content)
# Write mapping to source file
gl_enums_value_to_string_table = dump_value_to_string_mapping(gl_enum_in_groups,
exporting_enums)
source_content = template_gl_enums_source.format(
script_name=os.path.basename(sys.argv[0]),
data_source_name="gl.xml and gl_angle_ext.xml",
year=date.today().year,
gl_enums_value_to_string_table=gl_enums_value_to_string_table,
)
source_output_path = registry_xml.script_relative(source_output_path)
with open(source_output_path, 'w') as f:
f.write(source_content)
return 0
if __name__ == '__main__':
inputs = [
'gl.xml',
'gl_angle_ext.xml',
'registry_xml.py',
]
gl_enum_utils_autogen_base_path = '../src/libANGLE/gl_enum_utils_autogen'
outputs = [
gl_enum_utils_autogen_base_path + '.h',
gl_enum_utils_autogen_base_path + '.cpp',
]
if len(sys.argv) > 1:
if sys.argv[1] == 'inputs':
print ','.join(inputs)
elif sys.argv[1] == 'outputs':
print ','.join(outputs)
else:
sys.exit(
main(
registry_xml.script_relative(outputs[0]),
registry_xml.script_relative(outputs[1])))