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1
2# Copyright (C) 2012 Intel Corporation
3#
4# Permission is hereby granted, free of charge, to any person obtaining a
5# copy of this software and associated documentation files (the "Software"),
6# to deal in the Software without restriction, including without limitation
7# the rights to use, copy, modify, merge, publish, distribute, sublicense,
8# and/or sell copies of the Software, and to permit persons to whom the
9# Software is furnished to do so, subject to the following conditions:
10#
11# The above copyright notice and this permission notice (including the next
12# paragraph) shall be included in all copies or substantial portions of the
13# Software.
14#
15# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
18# THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
21# IN THE SOFTWARE.
22
23# This script generates the file api_exec_init.c, which contains
24# _mesa_initialize_exec_table().  It is responsible for populating all
25# entries in the "exec" dispatch table that aren't dynamic.
26
27import argparse
28import collections
29import license
30import gl_XML
31import sys
32import apiexec
33
34
35exec_flavor_map = {
36    'vtxfmt': None,
37    'dlist': '_mesa_',
38    'mesa': '_mesa_',
39    'skip': None,
40    }
41
42
43header = """/**
44 * \\file api_exec_init.c
45 * Initialize dispatch table.
46 */
47
48
49#include "api_exec_decl.h"
50#include "glapi/glapi.h"
51#include "main/context.h"
52#include "main/dispatch.h"
53
54
55/**
56 * Initialize a context's exec table with pointers to Mesa's supported
57 * GL functions.
58 *
59 * This function depends on ctx->Version.
60 *
61 * \param ctx  GL context to which \c exec belongs.
62 */
63void
64_mesa_initialize_exec_table(struct gl_context *ctx)
65{
66   struct _glapi_table *exec;
67
68   exec = ctx->Exec;
69   assert(exec != NULL);
70
71   assert(ctx->Version > 0);
72"""
73
74
75footer = """
76}
77"""
78
79
80class PrintCode(gl_XML.gl_print_base):
81
82    def __init__(self):
83        gl_XML.gl_print_base.__init__(self)
84
85        self.name = 'api_exec_init.py'
86        self.license = license.bsd_license_template % (
87            'Copyright (C) 2012 Intel Corporation',
88            'Intel Corporation')
89
90    def printRealHeader(self):
91        print(header)
92
93    def printRealFooter(self):
94        print(footer)
95
96    def printBody(self, api):
97        # Collect SET_* calls by the condition under which they should
98        # be called.
99        settings_by_condition = collections.defaultdict(lambda: [])
100        for f in api.functionIterateAll():
101            if f.exec_flavor not in exec_flavor_map:
102                raise Exception(
103                    'Unrecognized exec flavor {0!r}'.format(f.exec_flavor))
104            condition = apiexec.get_api_condition(f)
105            if not condition:
106                continue
107            prefix = exec_flavor_map[f.exec_flavor]
108            if prefix is None:
109                # This function is not implemented, or is dispatched
110                # via vtxfmt.
111                continue
112            if f.has_no_error_variant:
113                no_error_condition = '_mesa_is_no_error_enabled(ctx) && ({0})'.format(condition)
114                error_condition = '!_mesa_is_no_error_enabled(ctx) && ({0})'.format(condition)
115                settings_by_condition[no_error_condition].append(
116                    'SET_{0}(exec, {1}{0}_no_error);'.format(f.name, prefix, f.name))
117                settings_by_condition[error_condition].append(
118                    'SET_{0}(exec, {1}{0});'.format(f.name, prefix, f.name))
119            else:
120                settings_by_condition[condition].append(
121                    'SET_{0}(exec, {1}{0});'.format(f.name, prefix, f.name))
122        # Print out an if statement for each unique condition, with
123        # the SET_* calls nested inside it.
124        for condition in sorted(settings_by_condition.keys()):
125            print('   if ({0}) {{'.format(condition))
126            for setting in sorted(settings_by_condition[condition]):
127                print('      {0}'.format(setting))
128            print('   }')
129
130
131if __name__ == '__main__':
132    apiexec.print_glapi_file(PrintCode())
133