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# Copyright (C) 2012 Intel Corporation
#
# 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
# the rights to use, copy, modify, merge, publish, distribute, sublicense,
# 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 NONINFRINGEMENT. IN NO EVENT SHALL
# THE AUTHORS OR COPYRIGHT HOLDERS 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.
# This script generates the file api_exec.c, which contains
# _mesa_initialize_exec_table(). It is responsible for populating all
# entries in the "exec" dispatch table that aren't dynamic.
import argparse
import collections
import license
import gl_XML
import sys
import apiexec
exec_flavor_map = {
'dynamic': None,
'mesa': '_mesa_',
'skip': None,
}
header = """/**
* \\file api_exec.c
* Initialize dispatch table.
*/
#include "main/accum.h"
#include "main/api_loopback.h"
#include "main/api_exec.h"
#include "main/arbprogram.h"
#include "main/atifragshader.h"
#include "main/attrib.h"
#include "main/blend.h"
#include "main/blit.h"
#include "main/bufferobj.h"
#include "main/arrayobj.h"
#include "main/bbox.h"
#include "main/buffers.h"
#include "main/clear.h"
#include "main/clip.h"
#include "main/colortab.h"
#include "main/compute.h"
#include "main/condrender.h"
#include "main/context.h"
#include "main/convolve.h"
#include "main/copyimage.h"
#include "main/depth.h"
#include "main/debug_output.h"
#include "main/dlist.h"
#include "main/drawpix.h"
#include "main/drawtex.h"
#include "main/rastpos.h"
#include "main/enable.h"
#include "main/errors.h"
#include "main/es1_conversion.h"
#include "main/eval.h"
#include "main/get.h"
#include "main/feedback.h"
#include "main/fog.h"
#include "main/fbobject.h"
#include "main/framebuffer.h"
#include "main/genmipmap.h"
#include "main/hint.h"
#include "main/histogram.h"
#include "main/imports.h"
#include "main/light.h"
#include "main/lines.h"
#include "main/matrix.h"
#include "main/multisample.h"
#include "main/objectlabel.h"
#include "main/objectpurge.h"
#include "main/performance_monitor.h"
#include "main/performance_query.h"
#include "main/pipelineobj.h"
#include "main/pixel.h"
#include "main/pixelstore.h"
#include "main/points.h"
#include "main/polygon.h"
#include "main/program_resource.h"
#include "main/querymatrix.h"
#include "main/queryobj.h"
#include "main/readpix.h"
#include "main/samplerobj.h"
#include "main/scissor.h"
#include "main/stencil.h"
#include "main/texenv.h"
#include "main/texgetimage.h"
#include "main/teximage.h"
#include "main/texgen.h"
#include "main/texobj.h"
#include "main/texparam.h"
#include "main/texstate.h"
#include "main/texstorage.h"
#include "main/barrier.h"
#include "main/textureview.h"
#include "main/transformfeedback.h"
#include "main/mtypes.h"
#include "main/varray.h"
#include "main/viewport.h"
#include "main/shaderapi.h"
#include "main/shaderimage.h"
#include "main/uniforms.h"
#include "main/syncobj.h"
#include "main/formatquery.h"
#include "main/dispatch.h"
#include "main/vdpau.h"
#include "vbo/vbo.h"
/**
* Initialize a context's exec table with pointers to Mesa's supported
* GL functions.
*
* This function depends on ctx->Version.
*
* \param ctx GL context to which \c exec belongs.
*/
void
_mesa_initialize_exec_table(struct gl_context *ctx)
{
struct _glapi_table *exec;
exec = ctx->Exec;
assert(exec != NULL);
assert(ctx->Version > 0);
vbo_initialize_exec_dispatch(ctx, exec);
"""
footer = """
}
"""
class PrintCode(gl_XML.gl_print_base):
def __init__(self):
gl_XML.gl_print_base.__init__(self)
self.name = 'gl_genexec.py'
self.license = license.bsd_license_template % (
'Copyright (C) 2012 Intel Corporation',
'Intel Corporation')
def printRealHeader(self):
print header
def printRealFooter(self):
print footer
def printBody(self, api):
# Collect SET_* calls by the condition under which they should
# be called.
settings_by_condition = collections.defaultdict(lambda: [])
for f in api.functionIterateAll():
if f.exec_flavor not in exec_flavor_map:
raise Exception(
'Unrecognized exec flavor {0!r}'.format(f.exec_flavor))
condition_parts = []
if f.name in apiexec.functions:
ex = apiexec.functions[f.name]
unconditional_count = 0
if ex.compatibility is not None:
condition_parts.append('ctx->API == API_OPENGL_COMPAT')
unconditional_count += 1
if ex.core is not None:
condition_parts.append('ctx->API == API_OPENGL_CORE')
unconditional_count += 1
if ex.es1 is not None:
condition_parts.append('ctx->API == API_OPENGLES')
unconditional_count += 1
if ex.es2 is not None:
if ex.es2 > 20:
condition_parts.append('(ctx->API == API_OPENGLES2 && ctx->Version >= {0})'.format(ex.es2))
else:
condition_parts.append('ctx->API == API_OPENGLES2')
unconditional_count += 1
# If the function is unconditionally available in all four
# APIs, then it is always available. Replace the complex
# tautology condition with "true" and let GCC do the right
# thing.
if unconditional_count == 4:
condition_parts = ['true']
else:
if f.desktop:
if f.deprecated:
condition_parts.append('ctx->API == API_OPENGL_COMPAT')
else:
condition_parts.append('_mesa_is_desktop_gl(ctx)')
if 'es1' in f.api_map:
condition_parts.append('ctx->API == API_OPENGLES')
if 'es2' in f.api_map:
if f.api_map['es2'] > 2.0:
condition_parts.append('(ctx->API == API_OPENGLES2 && ctx->Version >= {0})'.format(int(f.api_map['es2'] * 10)))
else:
condition_parts.append('ctx->API == API_OPENGLES2')
if not condition_parts:
# This function does not exist in any API.
continue
condition = ' || '.join(condition_parts)
prefix = exec_flavor_map[f.exec_flavor]
if prefix is None:
# This function is not implemented, or is dispatched
# dynamically.
continue
if f.has_no_error_variant:
no_error_condition = '_mesa_is_no_error_enabled(ctx) && ({0})'.format(condition)
error_condition = '!_mesa_is_no_error_enabled(ctx) && ({0})'.format(condition)
settings_by_condition[no_error_condition].append(
'SET_{0}(exec, {1}{0}_no_error);'.format(f.name, prefix, f.name))
settings_by_condition[error_condition].append(
'SET_{0}(exec, {1}{0});'.format(f.name, prefix, f.name))
else:
settings_by_condition[condition].append(
'SET_{0}(exec, {1}{0});'.format(f.name, prefix, f.name))
# Print out an if statement for each unique condition, with
# the SET_* calls nested inside it.
for condition in sorted(settings_by_condition.keys()):
print ' if ({0}) {{'.format(condition)
for setting in sorted(settings_by_condition[condition]):
print ' {0}'.format(setting)
print ' }'
def _parser():
"""Parse arguments and return namespace."""
parser = argparse.ArgumentParser()
parser.add_argument('-f',
dest='filename',
default='gl_and_es_API.xml',
help='an xml file describing an API')
return parser.parse_args()
def main():
"""Main function."""
args = _parser()
printer = PrintCode()
api = gl_XML.parse_GL_API(args.filename)
printer.Print(api)
if __name__ == '__main__':
main()
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