wgltrace.py

##########################################################################
#
# Copyright 2008-2009 VMware, Inc.
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"""WGL tracing code generator."""


from stdapi import API
from glapi import glapi
from wglapi import wglapi
from dispatch import function_pointer_type, function_pointer_value
from gltrace import GlTracer
from codegen import *


class WglTracer(GlTracer):

    def get_function_address(self, function):
        return '__%s' % (function.name,)

    def wrap_ret(self, function, instance):
        if function.name == "wglGetProcAddress":
            print '    if (%s) {' % instance
        
            func_dict = dict([(f.name, f) for f in glapi.functions + wglapi.functions])

            def handle_case(function_name):
                f = func_dict[function_name]
                ptype = function_pointer_type(f)
                pvalue = function_pointer_value(f)
                print '    %s = (%s)%s;' % (pvalue, ptype, instance)
                print '    %s = (%s)&%s;' % (instance, function.type, f.name);
        
            def handle_default():
                print '    OS::DebugMessage("apitrace: unknown function \\"%s\\"\\n", lpszProc);'

            string_switch('lpszProc', func_dict.keys(), handle_case, handle_default)
            print '    }'


if __name__ == '__main__':
    print
    print '#define _GDI32_'
    print
    print '#include <string.h>'
    print '#include <windows.h>'
    print
    print '#include "trace_write.hpp"'
    print '#include "os.hpp"'
    print
    print '''
static HINSTANCE g_hDll = NULL;

static PROC
__getPublicProcAddress(LPCSTR lpProcName)
{
    if (!g_hDll) {
        char szDll[MAX_PATH] = {0};
        
        if (!GetSystemDirectoryA(szDll, MAX_PATH)) {
            return NULL;
        }
        
        strcat(szDll, "\\\\opengl32.dll");
        
        g_hDll = LoadLibraryA(szDll);
        if (!g_hDll) {
            return NULL;
        }
    }
        
    return GetProcAddress(g_hDll, lpProcName);
}

    '''
    print '#include "glproc.hpp"'
    print '#include "glsize.hpp"'
    print
    print 'extern "C" {'
    print
    api = API()
    api.add_api(glapi)
    api.add_api(wglapi)
    tracer = WglTracer()
    tracer.trace_api(api)
    print
    print '} /* extern "C" */'