new Python API generator scripts

1 files changed, 258 insertions, 0 deletions

diff --git a/src/mesa/glapi/glapitemp.py b/src/mesa/glapi/glapitemp.py
new file mode 100644
index 0000000000..58b622a11a
--- /dev/null
+++ b/src/mesa/glapi/glapitemp.py
@@ -0,0 +1,258 @@
+#!/usr/bin/env python
+
+# $Id: glapitemp.py,v 1.1 2001/11/18 22:42:57 brianp Exp $
+
+# Mesa 3-D graphics library
+# Version:  4.1
+# 
+# Copyright (C) 1999-2001  Brian Paul   All Rights Reserved.
+# 
+# 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 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
+# BRIAN PAUL 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.
+
+
+# Generate the glapitemp.h file.
+#
+# Usage:
+#    gloffsets.py >glapitemp.h
+#
+# Dependencies:
+#    The apispec file must be in the current directory.
+
+
+
+import apiparser;
+
+
+def PrintHead():
+	print """
+/* DO NOT EDIT!  This file is generated by the glapitemp.py script. */
+
+/*
+ * This file is a template which generates the OpenGL API entry point
+ * functions.  It should be included by a .c file which first defines
+ * the following macros:
+ *   KEYWORD1 - usually nothing, but might be __declspec(dllexport) on Win32
+ *   KEYWORD2 - usually nothing, but might be __stdcall on Win32
+ *   NAME(n)  - builds the final function name (usually add "gl" prefix)
+ *   DISPATCH(func, args, msg) - code to do dispatch of named function.
+ *                               msg is a printf-style debug message.
+ *   RETURN_DISPATCH(func, args, msg) - code to do dispatch with a return value
+ *
+ * Here's an example which generates the usual OpenGL functions:
+ *   #define KEYWORD1
+ *   #define KEYWORD2
+ *   #define NAME(func)  gl##func
+ *   #define DISPATCH(func, args, msg)                           \\
+ *          struct _glapi_table *dispatch = CurrentDispatch;     \\
+ *          (*dispatch->func) args
+ *   #define RETURN DISPATCH(func, args, msg)                    \\
+ *          struct _glapi_table *dispatch = CurrentDispatch;     \\
+ *          return (*dispatch->func) args
+ *
+ */
+
+
+#ifndef KEYWORD1
+#define KEYWORD1
+#endif
+
+#ifndef KEYWORD2
+#define KEYWORD2
+#endif
+
+#ifndef NAME
+#error NAME must be defined
+#endif
+
+#ifndef DISPATCH
+#error DISPATCH must be defined
+#endif
+
+#ifndef RETURN_DISPATCH
+#error RETURN_DISPATCH must be defined
+#endif
+
+"""
+#enddef
+
+
+def PrintTail():
+	print"""
+#undef KEYWORD1
+#undef KEYWORD2
+#undef NAME
+#undef DISPATCH
+#undef RETURN_DISPATCH
+#undef DISPATCH_TABLE_NAME
+#undef UNUSED_TABLE_NAME
+#undef TABLE_ENTRY
+"""
+#endif
+
+
+def MakeParamList(nameList):
+	n = len(nameList)
+	i = 1
+	result = ''
+	for name in nameList:
+		result = result + name
+		if i < n:
+			result = result + ', '
+		i = i + 1
+	return result
+#enddef
+
+
+def MakePrintfString(funcName, argTypeList, argNameList):
+	result = '(F, "gl%s(' % (funcName)
+
+	n = len(argTypeList)
+	i = 1
+	isPointer = {}
+	for argType in argTypeList:
+		isPointer[i] = 0
+		if argType == 'GLenum':
+			result = result + '0x%x'
+		elif argType in ['GLfloat', 'GLdouble', 'GLclampf', 'GLclampd']:
+			result = result + '%f'
+		elif argType in ['GLbyte', 'GLubyte', 'GLshort', 'GLushort', 'GLint', 'GLuint', 'GLboolean']:
+			result = result + '%d'
+		else:
+			result = result + '%p'
+			isPointer[i] = 1
+		if i < n:
+			result = result + ', '
+		i = i + 1
+	#endfor
+
+	result = result + ');"'
+	
+	n = len(argNameList)
+	i = 1
+	if n > 0:
+		result = result + ', '
+	for pname in argNameList:
+		if isPointer[i]:
+			result = result + '(void *) '
+		result = result + pname
+		if i < n:
+			result = result + ', '
+		i = i + 1
+	result = result + ')'
+	return result
+#enddef
+
+
+records = []
+emittedFuncs = {}
+aliasedFuncs = []
+
+def FindOffset(funcName):
+	for (name, alias, offset) in records:
+		if name == funcName:
+			return offset
+		#endif
+	#endfor
+	return -1
+#enddef
+
+def EmitFunction(name, returnType, argTypeList, argNameList, alias, offset):
+	argList = apiparser.MakeArgList(argTypeList, argNameList)
+	parms = MakeParamList(argNameList)
+	printString = MakePrintfString(name, argTypeList, argNameList)
+	if alias == '':
+		dispatchName = name
+	else:
+		dispatchName = alias
+	if offset < 0:
+		offset = FindOffset(dispatchName)
+	if offset >= 0:
+		print 'KEYWORD1 %s KEYWORD2 NAME(%s)(%s)' % (returnType, name, argList)
+		print '{'
+		if returnType == 'void':
+			print '   DISPATCH(%s, (%s), %s);' % (dispatchName, parms, printString)
+		else:
+			print '   RETURN_DISPATCH(%s, (%s), %s);' % (dispatchName, parms, printString)
+		print '}'
+		print ''
+		records.append((name, dispatchName, offset))
+		if not emittedFuncs.has_key(offset):
+			emittedFuncs[offset] = name
+		else:
+			aliasedFuncs.append(name)
+	else:
+		print '/* No dispatch for %s() */' % (name)
+#endif
+
+
+def PrintInitDispatch():
+	print """
+
+/*
+ * This is how a dispatch table can be initialized with all the functions
+ * we generated above.
+ */
+#ifdef DISPATCH_TABLE_NAME
+
+#ifndef TABLE_ENTRY
+#error TABLE_ENTRY must be defined
+#endif
+
+void *DISPATCH_TABLE_NAME[] = {"""
+	keys = emittedFuncs.keys()
+	keys.sort()
+	for k in keys:
+		print '   TABLE_ENTRY(%s),' % (emittedFuncs[k])
+
+	print '   /* A whole bunch of no-op functions.  These might be called'
+	print '    * when someone tries to call a dynamically-registered'
+	print '    * extension function without a current rendering context.'
+	print '    */'
+	for i in range(1, 100):
+		print '   TABLE_ENTRY(Unused),'
+
+	print '};'
+	print '#endif /* DISPATCH_TABLE_NAME */'
+	print ''
+#enddef
+
+
+
+def PrintAliasedTable():
+	print """
+/*
+ * This is just used to silence compiler warnings.
+ * We list the functions which aren't otherwise used.
+ */
+#ifdef UNUSED_TABLE_NAME
+void *UNUSED_TABLE_NAME[] = {"""
+	for alias in aliasedFuncs:
+		print '   TABLE_ENTRY(%s),' % (alias)
+	#endfor
+	print '};'
+	print '#endif /*UNUSED_TABLE_NAME*/'
+	print ''
+#enddef	
+
+
+
+PrintHead()
+apiparser.ProcessSpecFile("APIspec", EmitFunction)
+PrintInitDispatch()
+PrintAliasedTable()
+PrintTail()