159 lines
4.7 KiB
Python
159 lines
4.7 KiB
Python
import xml.etree.ElementTree as et
|
|
from argparse import ArgumentParser
|
|
from datetime import datetime
|
|
|
|
#---------------------------------------------------------------
|
|
#NOTE: get args
|
|
#---------------------------------------------------------------
|
|
|
|
parser = ArgumentParser()
|
|
parser.add_argument("-s", "--spec")
|
|
parser.add_argument("-d", "--directory")
|
|
|
|
args = parser.parse_args()
|
|
|
|
apiName = 'gl_api'
|
|
loaderName = 'gl_loader'
|
|
|
|
apiPath = args.directory + '/' + apiName + '.h'
|
|
loaderHeaderPath = args.directory + '/' + loaderName + '.h'
|
|
loaderCPath = args.directory + '/' + loaderName + '.c'
|
|
|
|
#---------------------------------------------------------------
|
|
#NOTE: gather all GL functions in OpenGL 4.3
|
|
#---------------------------------------------------------------
|
|
|
|
def gather_api(tree, api, version):
|
|
procs = []
|
|
for feature in tree.iterfind('feature[@api="'+ api +'"]'):
|
|
if float(feature.get('number')) > version:
|
|
break
|
|
|
|
for require in feature.iter('require'):
|
|
if require.get('profile') == 'compatibility':
|
|
continue
|
|
for command in require.iter('command'):
|
|
procs.append(command.get('name'))
|
|
|
|
for remove in feature.iter('remove'):
|
|
for command in remove.iter('command'):
|
|
procs.remove(command.get('name'))
|
|
return(procs)
|
|
|
|
tree = et.parse(args.spec)
|
|
|
|
gl41 = gather_api(tree, 'gl', 4.1)
|
|
gl43 = gather_api(tree, 'gl', 4.3)
|
|
gles31 = gather_api(tree, 'gles2', 3.1)
|
|
gles32 = gather_api(tree, 'gles2', 3.2)
|
|
|
|
glall = list(set().union(gl41, gl43, gles31, gles32))
|
|
|
|
|
|
#---------------------------------------------------------------
|
|
# helpers
|
|
#---------------------------------------------------------------
|
|
|
|
def emit_doc(f, name, ext):
|
|
f.write("/********************************************************\n")
|
|
f.write("*\n")
|
|
f.write("*\t@file: " + name + ext + '\n')
|
|
f.write("*\t@note: auto-generated by glapi.py from gl.xml\n")
|
|
f.write("*\t@date: %s\n" % datetime.now().strftime("%d/%m%Y"))
|
|
f.write("*\n")
|
|
f.write("/********************************************************/\n")
|
|
|
|
|
|
def emit_begin_guard(f, name):
|
|
guard = '__' + name.upper() + '_H__'
|
|
f.write("#ifndef " + guard + "\n")
|
|
f.write("#define " + guard + "\n\n")
|
|
|
|
def emit_end_guard(f, name):
|
|
guard = '__' + name.upper() + '_H__'
|
|
f.write("#endif // " + guard + "\n")
|
|
|
|
def remove_prefix(s, prefix):
|
|
if s.startswith(prefix):
|
|
return s[len(prefix):]
|
|
|
|
#---------------------------------------------------------------
|
|
# Generate GL API header file
|
|
#---------------------------------------------------------------
|
|
|
|
f = open(apiPath, 'w')
|
|
|
|
emit_doc(f, apiName, '.h')
|
|
emit_begin_guard(f, apiName)
|
|
|
|
f.write('#include"GL/glcorearb.h"\n')
|
|
f.write('#include"GLES3/gl32.h"\n\n')
|
|
|
|
# generate interface struct
|
|
f.write('typedef struct mg_gl_api\n{\n')
|
|
|
|
for func in glall:
|
|
f.write('\t' + 'PFN' + func.upper() + 'PROC ' + remove_prefix(func, 'gl') + ';\n')
|
|
|
|
f.write('} mg_gl_api;\n\n')
|
|
f.write('extern mp_thread_local mg_gl_api* __mgGLAPI;\n\n');
|
|
|
|
# generate interface macros
|
|
# TODO guard for different api/versions and only #define functions present in desired version
|
|
for func in glall:
|
|
f.write('#define ' + func + ' __mgGLAPI->' + remove_prefix(func, 'gl') + '\n')
|
|
|
|
emit_end_guard(f, apiName)
|
|
f.close()
|
|
|
|
#---------------------------------------------------------------
|
|
# Generate GL loader header
|
|
#---------------------------------------------------------------
|
|
|
|
f = open(loaderHeaderPath, 'w')
|
|
|
|
emit_doc(f, loaderName, '.h')
|
|
emit_begin_guard(f, loaderName)
|
|
|
|
f.write('#include"gl_api.h"\n\n')
|
|
|
|
f.write("typedef void*(*mg_gl_load_proc)(const char* name);\n\n")
|
|
|
|
f.write("void mg_gl_load_gl41(mg_gl_api* api, mg_gl_load_proc loadProc);\n")
|
|
f.write("void mg_gl_load_gl43(mg_gl_api* api, mg_gl_load_proc loadProc);\n")
|
|
f.write("void mg_gl_load_gles31(mg_gl_api* api, mg_gl_load_proc loadProc);\n")
|
|
f.write("void mg_gl_load_gles32(mg_gl_api* api, mg_gl_load_proc loadProc);\n\n")
|
|
|
|
f.write("void mg_gl_select_api(mg_gl_api* api);\n\n")
|
|
|
|
emit_end_guard(f, loaderName)
|
|
f.close()
|
|
#---------------------------------------------------------------
|
|
# Generate GL loader code
|
|
#---------------------------------------------------------------
|
|
|
|
def emit_loader(f, name, procs):
|
|
f.write('void mg_gl_load_'+ name +'(mg_gl_api* api, mg_gl_load_proc loadProc)\n')
|
|
f.write("{\n")
|
|
for proc in procs:
|
|
f.write('\tapi->' + remove_prefix(proc, 'gl') + ' = loadProc("' + proc + '");\n')
|
|
f.write("}\n\n")
|
|
|
|
f = open(loaderCPath, 'w')
|
|
|
|
emit_doc(f, loaderName, '.c')
|
|
|
|
f.write('#include"' + apiName + '.h"\n')
|
|
f.write('#include"platform.h"\n\n')
|
|
|
|
f.write("mp_thread_local mg_gl_api* __mgGLAPI = 0;\n\n")
|
|
|
|
emit_loader(f, 'gl41', gl41)
|
|
emit_loader(f, 'gl43', gl43)
|
|
emit_loader(f, 'gles31', gles31)
|
|
emit_loader(f, 'gles32', gles32)
|
|
|
|
f.write("void mg_gl_select_api(mg_gl_api* api){ __mgGLAPI = api; }\n\n")
|
|
|
|
f.close()
|