326 lines
11 KiB
Python
Executable File
326 lines
11 KiB
Python
Executable File
#!/usr/bin/python
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#
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# Comedy python script to generate cdecl to stdcall wrappers for GL functions
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#
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# This is designed to operate on OpenGL spec files from
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# http://www.opengl.org/registry/api/
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#
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#
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# Copyright (c) Jon TURNEY 2009
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#
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# Permission is hereby granted, free of charge, to any person obtaining a
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# copy of this software and associated documentation files (the "Software"),
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# to deal in the Software without restriction, including without limitation
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# the rights to use, copy, modify, merge, publish, distribute, sublicense,
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# and/or sell copies of the Software, and to permit persons to whom the
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# Software is furnished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be included in
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# all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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# THE ABOVE LISTED COPYRIGHT HOLDER(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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# OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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# ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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# DEALINGS IN THE SOFTWARE.
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#
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# Except as contained in this notice, the name(s) of the above copyright
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# holders shall not be used in advertising or otherwise to promote the sale,
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# use or other dealings in this Software without prior written authorization.
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#
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import sys
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import re
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import getopt
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dispatchheader = ''
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prefix = 'gl'
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preresolve = False
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staticwrappers = False
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opts, args = getopt.getopt(sys.argv[1:], "", ['spec=', 'typemap=', 'dispatch-header=', 'prefix=', 'preresolve', 'staticwrappers' ])
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for o,a in opts:
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if o == '--typemap' :
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typemapfile = a
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elif o == '--dispatch-header' :
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dispatchheader = a
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elif o == '--spec' :
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specfile = a
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elif o == '--prefix' :
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prefix = a
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elif o == '--preresolve' :
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preresolve = True
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elif o == '--staticwrappers' :
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staticwrappers = True
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#
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# look for all the SET_ macros in dispatch.h, this is the set of functions
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# we need to generate
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#
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dispatch = {}
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if dispatchheader :
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fh = open(dispatchheader)
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dispatchh = fh.readlines()
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dispatch_regex = re.compile(r'^SET_(\S*)\(')
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for line in dispatchh :
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line = line.strip()
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m1 = dispatch_regex.search(line)
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if m1 :
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dispatch[m1.group(1)] = 1
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del dispatch['by_offset']
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#
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# read the typemap .tm file
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#
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typemap = {}
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fh = open(typemapfile)
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tm = fh.readlines()
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typemap_regex = re.compile(r'#define\sSET_(\S*)\(')
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for line in tm :
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# ignore everything after a '#' as a comment
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hash = line.find('#')
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if hash != -1 :
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line = line[:hash-1]
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# ignore blank lines
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if line.startswith('#') or len(line) == 0 :
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continue
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l = line.split(',')
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typemap[l[0]] = l[3].strip()
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# interestingly, * is not a C type
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if typemap['void'] == '*' :
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typemap['void'] = 'void'
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#
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# crudely parse the .spec file
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#
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r1 = re.compile(r'\t(\S*)\s+(\S*.*)')
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r2 = re.compile(r'(.*)\((.*)\)')
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r3 = re.compile(r'glWindowPos.*MESA')
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r4 = re.compile(r'gl.*Program(s|)NV')
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r5 = re.compile(r'glGetVertexAttribfvNV')
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wrappers = {}
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fh = open(specfile)
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glspec = fh.readlines()
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param_count = 0
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for line in glspec :
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line = line.rstrip()
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# ignore everything after a '#' as a comment
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hash = line.find('#')
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if hash != -1 :
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line = line[:hash-1]
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# ignore blank lines
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if line.startswith('#') or len(line) == 0 :
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continue
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# lines containing ':' aren't intersting to us
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if line.count(':') != 0 :
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continue
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# attributes of each function follow the name, indented by a tab
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if not line.startswith('\t') :
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m1 = r2.search(line)
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if m1 :
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function = m1.group(1)
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arglist_use = m1.group(2)
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wrappers[function] = {}
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# ensure formal parameter names don't collide with reserved names or shadow global declarations
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arglist_use = ',' .join([i.rstrip() + '_' for i in arglist_use.split(",")])
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wrappers[function]['arglist_use'] = arglist_use
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param_count = 0
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else :
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m1 = r1.search(line)
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if m1 :
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attribute = m1.group(1)
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value = m1.group(2)
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# make param attributes unique and ordered
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if attribute == 'param' :
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attribute = 'param' + '%02d' % param_count
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param_count += 1
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wrappers[function][attribute] = value
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#
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# now emit code
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#
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print '/* Automatically generated by ' + sys.argv[0] + ' DO NOT EDIT */'
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print '/* from ' + specfile + ' and typemap ' + typemapfile + ' */'
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print ''
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#
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# if required, emit code for non-lazy function resolving
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#
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if preresolve :
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for w in sorted(wrappers.keys()) :
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funcname = prefix + w
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print 'RESOLVE_DECL(PFN' + funcname.upper() + 'PROC);'
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print ''
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print 'void ' + prefix + 'ResolveExtensionProcs(void)'
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print '{'
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for w in sorted(wrappers.keys()) :
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funcname = prefix + w
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print ' PRERESOLVE(PFN' + funcname.upper() + 'PROC, "' + funcname + '");'
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print '}\n'
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#
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# now emit the wrappers
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# for GL 1.0 and 1.1 functions, generate stdcall wrappers which call the function directly
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# for GL 1.2+ functions, generate wrappers which use wglGetProcAddress()
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#
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for w in sorted(wrappers.keys()) :
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funcname = prefix + w
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returntype = wrappers[w]['return']
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if returntype != 'void' :
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returntype = typemap[returntype]
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# Avoid generating wrappers which aren't referenced by the dispatch table
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if dispatchheader and not dispatch.has_key(w) :
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print '/* No wrapper for ' + funcname + ', not in dispatch table */'
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continue
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# manufacture arglist
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# if no param attributes were found, it should be 'void'
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al = []
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for k in sorted(wrappers[w].keys()) :
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if k.startswith('param') :
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l = wrappers[w][k].split()
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# ensure formal parameter names don't collide with reserved names or shadow global declarations
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l[0] = l[0] + '_'
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if l[2] == 'in' :
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if l[3] == 'array' :
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arg = 'const ' + typemap[l[1]] + ' *' + l[0]
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else :
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arg = typemap[l[1]] + ' ' + l[0]
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elif l[2] == 'out' :
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arg = typemap[l[1]] + ' *' + l[0]
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al.append(arg)
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if len(al) == 0 :
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arglist = 'void'
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else:
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arglist = ', '.join(al)
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if wrappers[w]['category'].startswith('VERSION_1_0') or wrappers[w]['category'].startswith('VERSION_1_1') :
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if staticwrappers :
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print 'static',
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print returntype + ' ' + funcname + 'Wrapper(' + arglist + ')'
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print '{'
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print ' if (glxWinDebugSettings.enable' + prefix.upper() + 'callTrace) ErrorF("'+ funcname + '\\n");'
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print ' glWinDirectProcCalls++;'
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if returntype.lower() == 'void' :
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print ' ' + funcname + '(',
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else :
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print ' /* returntype was ' + returntype.lower() + '*/'
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print ' return ' + funcname + '(',
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if arglist != 'void' :
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print wrappers[w]['arglist_use'],
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print ');'
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print "}\n"
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else:
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if staticwrappers :
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print 'static',
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print returntype + ' ' + funcname + 'Wrapper(' + arglist + ')'
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print '{'
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stringname = funcname
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#
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# special case: Windows OpenGL implementations are far more likely to have GL_ARB_window_pos than GL_MESA_window_pos,
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# so arrange for the wrapper to use the ARB strings to find functions...
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#
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m2 = r3.search(funcname)
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if m2 :
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stringname = stringname.replace('MESA','ARB')
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#
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# special case: likewise, implementations are more likely to have GL_ARB_vertex_program than GL_NV_vertex_program,
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# especially if they are not NV implementations, so arrange for the wrapper to use ARB strings to find functions
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#
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m3 = r4.search(funcname)
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if m3 :
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stringname = stringname.replace('NV','ARB')
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m4 = r5.search(funcname)
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if m4 :
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stringname = stringname.replace('NV','ARB')
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pfntypename = 'PFN' + funcname.upper() + 'PROC'
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if returntype.lower() == 'void' :
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print ' RESOLVE(' + pfntypename + ', "' + stringname + '");'
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print ' if (glxWinDebugSettings.enable' + prefix.upper() + 'callTrace) ErrorF("'+ funcname + '\\n");'
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print ' RESOLVED_PROC(' + pfntypename + ')(',
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else :
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print ' RESOLVE_RET(' + pfntypename + ', "' + stringname + '", FALSE);'
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print ' if (glxWinDebugSettings.enable' + prefix.upper() + 'callTrace) ErrorF("'+ funcname + '\\n");'
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print ' return RESOLVED_PROC(' + pfntypename + ')(',
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if arglist != 'void' :
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print wrappers[w]['arglist_use'],
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print ');'
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print "}\n"
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# generate function to setup the dispatch table, which sets each
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# dispatch table entry to point to it's wrapper function
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# (assuming we were able to make one)
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if dispatchheader :
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print 'void glWinSetupDispatchTable(void)'
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print '{'
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print ' static struct _glapi_table *disp = NULL;'
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print ''
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print ' if (!disp)'
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print ' {'
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print ' disp = calloc(sizeof(void *), _glapi_get_dispatch_table_size());'
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print ' assert(disp);'
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for d in sorted(dispatch.keys()) :
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if wrappers.has_key(d) :
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print ' SET_'+ d + '(disp, (void *)' + prefix + d + 'Wrapper);'
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else :
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print '#warning No wrapper for ' + prefix + d + ' !'
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print ' }'
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print ''
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print ' _glapi_set_dispatch(disp);'
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print '}'
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