#!/usr/bin/python2 # coding=utf-8 # -*- Mode: Python; py-indent-offset: 4 -*- # # Copyright © 2012 Intel Corporation # # Based on code by Kristian Høgsberg <krh@bitplanet.net>, # extracted from mesa/main/get.c # # Permission is hereby granted, free of charge, to any person obtaining a # copy of this software and associated documentation files (the "Software"), # to deal in the Software without restriction, including without limitation # on the rights to use, copy, modify, merge, publish, distribute, sub # license, and/or sell copies of the Software, and to permit persons to whom # the Software is furnished to do so, subject to the following conditions: # # The above copyright notice and this permission notice (including the next # paragraph) shall be included in all copies or substantial portions of the # Software. # # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, # FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL # IBM AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING # FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS # IN THE SOFTWARE. # Generate a C header file containing hash tables of glGet parameter # names for each GL API. The generated file is to be included by glGet.c import os, sys, imp, getopt from collections import defaultdict import get_hash_params cur_dir = os.path.dirname(sys.argv[0]) param_desc_file = "%s/get_hash_params.py" % cur_dir GLAPI = "%s/../../mapi/glapi/gen" % cur_dir sys.path.append(GLAPI) import gl_XML prime_factor = 89 prime_step = 281 hash_table_size = 1024 gl_apis=set(["GL", "GL_CORE", "GLES", "GLES2", "GLES3"]) def print_header(): print "typedef const unsigned short table_t[%d];\n" % (hash_table_size) print "static const int prime_factor = %d, prime_step = %d;\n" % \ (prime_factor, prime_step) def print_params(params): print "static struct value_desc values[] = {" for p in params: print " { %s, %s }," % (p[0], p[1]) print "};\n" def api_name(api): return "API_OPEN%s" % api # This must match gl_api enum in src/mesa/main/mtypes.h api_enum = [ 'GL', 'GLES', 'GLES2', 'GL_CORE', 'GLES3', # Not in gl_api enum in mtypes.h ] def api_index(api): return api_enum.index(api) def table_name(api): return "table_" + api_name(api) def print_table(api, table): print "static table_t %s = {" % (table_name(api)) # convert sparse (index, value) table into a dense table dense_table = [0] * hash_table_size for i, v in table: dense_table[i] = v row_size = 4 for i in range(0, hash_table_size, row_size): row = dense_table[i : i + row_size] idx_val = ["%4d" % v for v in row] print " " * 4 + ", ".join(idx_val) + "," print "};\n" def print_tables(tables): for table in tables: print_table(table["apis"][0], table["indices"]) dense_tables = ['NULL'] * len(api_enum) for table in tables: tname = table_name(table["apis"][0]) for api in table["apis"]: i = api_index(api) dense_tables[i] = "&%s" % (tname) print "static table_t *table_set[] = {" for expr in dense_tables: print " %s," % expr print "};\n" print "#define table(api) (*table_set[api])" # Merge tables with matching parameter lists (i.e. GL and GL_CORE) def merge_tables(tables): merged_tables = [] for api, indices in sorted(tables.items()): matching_table = filter(lambda mt:mt["indices"] == indices, merged_tables) if matching_table: matching_table[0]["apis"].append(api) else: merged_tables.append({"apis": [api], "indices": indices}) return merged_tables def add_to_hash_table(table, hash_val, value): while True: index = hash_val & (hash_table_size - 1) if index not in table: table[index] = value break hash_val += prime_step def die(msg): sys.stderr.write("%s: %s\n" % (program, msg)) exit(1) program = os.path.basename(sys.argv[0]) def generate_hash_tables(enum_list, enabled_apis, param_descriptors): tables = defaultdict(lambda:{}) # the first entry should be invalid, so that get.c:find_value can use # its index for the 'enum not found' condition. params = [[0, ""]] for param_block in param_descriptors: if set(["apis", "params"]) != set(param_block): die("missing fields (%s) in param descriptor file (%s)" % (", ".join(set(["apis", "params"]) - set(param_block)), param_desc_file)) valid_apis = set(param_block["apis"]) if valid_apis - gl_apis: die("unknown API(s) in param descriptor file (%s): %s\n" % (param_desc_file, ",".join(valid_apis - gl_apis))) if not (valid_apis & enabled_apis): continue valid_apis &= enabled_apis for param in param_block["params"]: enum_name = param[0] enum_val = enum_list[enum_name].value hash_val = enum_val * prime_factor for api in valid_apis: add_to_hash_table(tables[api], hash_val, len(params)) # Also add GLES2 items to the GLES3 hash table if api == "GLES2": add_to_hash_table(tables["GLES3"], hash_val, len(params)) params.append(["GL_" + enum_name, param[1]]) sorted_tables={} for api, indices in tables.items(): sorted_tables[api] = sorted(indices.items()) return params, merge_tables(sorted_tables) def show_usage(): sys.stderr.write( """Usage: %s [OPTIONS] -f <file> specify GL API XML file """ % (program)) exit(1) if __name__ == '__main__': try: (opts, args) = getopt.getopt(sys.argv[1:], "f:") except Exception,e: show_usage() if len(args) != 0: show_usage() api_desc_file = "" for opt_name, opt_val in opts: if opt_name == "-f": api_desc_file = opt_val if not api_desc_file: die("missing descriptor file (-f)\n") # generate the code for all APIs enabled_apis = set(["GLES", "GLES2", "GLES3", "GL", "GL_CORE"]) try: api_desc = gl_XML.parse_GL_API(api_desc_file) except Exception: die("couldn't parse API specification file %s\n" % api_desc_file) (params, hash_tables) = generate_hash_tables(api_desc.enums_by_name, enabled_apis, get_hash_params.descriptor) print_header() print_params(params) print_tables(hash_tables)