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#! /usr/bin/env python
import sys
if (len(sys.argv)<2):
print("usage: make_glwrapper.py <headers>")
sys.exit(255)
functions=[]
types=[]
constants=[]
READ_FUNCTIONS=0
READ_TYPES=1
READ_CONSTANTS=2
read_what=READ_TYPES
for x in (range(len(sys.argv)-1)):
f=open(sys.argv[x+1],"r")
while(True):
line=f.readline()
if (line==""):
break
line=line.replace("\n","").strip()
"""
if (line.find("[types]")!=-1):
read_what=READ_TYPES
continue
elif (line.find("[constants]")!=-1):
read=READ_TYPES
continue
elif (line.find("[functions]")!=-1):
read_what=READ_FUNCTIONS
continue
"""
if (line.find("#define")!=-1):
if (line.find("0x")==-1 and line.find("GL_VERSION")==-1):
continue
constants.append(line)
elif (line.find("typedef")!=-1):
if (line.find("(")!=-1 or line.find(")")!=-1 or line.find("ARB")!=-1 or line.find("EXT")!=-1 or line.find("GL")==-1):
continue
types.append(line)
elif (line.find("APIENTRY")!=-1 and line.find("GLAPI")!=-1):
if (line.find("ARB")!=-1 or line.find("EXT")!=-1 or line.find("NV")!=-1):
continue
line=line.replace("APIENTRY","")
line=line.replace("GLAPI","")
glpos=line.find(" gl")
if (glpos==-1):
glpos=line.find("\tgl")
if (glpos==-1):
continue
ret=line[:glpos].strip();
line=line[glpos:].strip()
namepos=line.find("(")
if (namepos==-1):
continue
name=line[:namepos].strip()
line=line[namepos:]
argpos=line.rfind(")")
if (argpos==-1):
continue
args=line[1:argpos]
funcdata={}
funcdata["ret"]=ret
funcdata["name"]=name
funcdata["args"]=args
functions.append(funcdata)
print(funcdata)
#print(types)
#print(constants)
#print(functions)
f=open("glwrapper.h","w")
f.write("#ifndef GL_WRAPPER\n")
f.write("#define GL_WRAPPER\n\n\n")
header_code="""\
#if defined(__gl_h_) || defined(__GL_H__)
#error gl.h included before glwrapper.h
#endif
#if defined(__glext_h_) || defined(__GLEXT_H_)
#error glext.h included before glwrapper.h
#endif
#if defined(__gl_ATI_h_)
#error glATI.h included before glwrapper.h
#endif
#define __gl_h_
#define __GL_H__
#define __glext_h_
#define __GLEXT_H_
#define __gl_ATI_h_
#define GL_TRUE 1
#define GL_FALSE 0
#define GL_ZERO 0
#define GL_ONE 1
#define GL_NONE 0
#define GL_NO_ERROR 0
\n\n
"""
f.write("#include <stddef.h>\n\n\n")
f.write(header_code);
f.write("#ifdef __cplusplus\nextern \"C\" {\n#endif\n\n\n")
f.write("#if defined(_WIN32) && !defined(__CYGWIN__)\n")
f.write("#define GLWRP_APIENTRY __stdcall\n")
f.write("#else\n");
f.write("#define GLWRP_APIENTRY \n")
f.write("#endif\n\n");
for x in types:
f.write(x+"\n")
f.write("\n\n")
for x in constants:
f.write(x+"\n")
f.write("\n\n")
for x in functions:
f.write("extern "+x["ret"]+" GLWRP_APIENTRY (*__wrapper_"+x["name"]+")("+x["args"]+");\n")
f.write("#define "+x["name"]+" __wrapper_"+x["name"]+"\n")
f.write("\n\n")
f.write("typedef void (*GLWrapperFuncPtr)(void);\n\n");
f.write("void glWrapperInit( GLWrapperFuncPtr (*wrapperFunc)(const char*) );\n")
f.write("#ifdef __cplusplus\n}\n#endif\n")
f.write("#endif\n\n")
f=open("glwrapper.c","w")
f.write("\n\n")
f.write("#include \"glwrapper.h\"\n")
f.write("\n\n")
for x in functions:
f.write(x["ret"]+" GLWRP_APIENTRY (*__wrapper_"+x["name"]+")("+x["args"]+")=NULL;\n")
f.write("\n\n")
f.write("void glWrapperInit( GLWrapperFuncPtr (*wrapperFunc)(const char*) ) {\n")
f.write("\n")
for x in functions:
f.write("\t__wrapper_"+x["name"]+"=("+x["ret"]+" GLWRP_APIENTRY (*)("+x["args"]+"))wrapperFunc(\""+x["name"]+"\");\n")
f.write("\n\n")
f.write("}\n")
f.write("\n\n")
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