Merge commit 'origin/master' into gallium-msaa

1 files changed, 730 insertions, 0 deletions

diff --git a/src/mesa/main/es_generator.py b/src/mesa/main/es_generator.py
new file mode 100644
index 00000000000..8f08a3a6f92
--- /dev/null
+++ b/src/mesa/main/es_generator.py
@@ -0,0 +1,730 @@
+#*************************************************************************
+# Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
+# 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
+# TUNGSTEN GRAPHICS 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.
+#*************************************************************************
+
+
+import sys, os
+import APIspecutil as apiutil
+
+# These dictionary entries are used for automatic conversion.
+# The string will be used as a format string with the conversion
+# variable.
+Converters = {
+    'GLfloat': {
+        'GLdouble': "(GLdouble) (%s)",
+        'GLfixed' : "(GLint) (%s * 65536)",
+    },
+    'GLfixed': {
+        'GLfloat': "(GLfloat) (%s / 65536.0f)",
+        'GLdouble': "(GLdouble) (%s / 65536.0)",
+    },
+    'GLdouble': {
+        'GLfloat': "(GLfloat) (%s)",
+        'GLfixed': "(GLfixed) (%s * 65536)",
+    },
+    'GLclampf': {
+        'GLclampd': "(GLclampd) (%s)",
+        'GLclampx': "(GLclampx) (%s * 65536)",
+    },
+    'GLclampx': {
+        'GLclampf': "(GLclampf) (%s / 65536.0f)",
+        'GLclampd': "(GLclampd) (%s / 65536.0)",
+    },
+    'GLubyte': {
+        'GLfloat': "(GLfloat) (%s / 255.0f)",
+    },
+}
+
+def GetBaseType(type):
+    typeTokens = type.split(' ')
+    baseType = None
+    typeModifiers = []
+    for t in typeTokens:
+        if t in ['const', '*']:
+            typeModifiers.append(t)
+        else:
+            baseType = t
+    return (baseType, typeModifiers)
+
+def ConvertValue(value, fromType, toType):
+    """Returns a string that represents the given parameter string, 
+    type-converted if necessary."""
+
+    if not Converters.has_key(fromType):
+        print >> sys.stderr, "No base converter for type '%s' found.  Ignoring." % fromType
+        return value
+
+    if not Converters[fromType].has_key(toType):
+        print >> sys.stderr, "No converter found for type '%s' to type '%s'.  Ignoring." % (fromType, toType)
+        return value
+
+    # This part is simple.  Return the proper conversion.
+    conversionString = Converters[fromType][toType]
+    return conversionString % value
+
+FormatStrings = {
+    'GLenum' : '0x%x',
+    'GLfloat' : '%f',
+    'GLint' : '%d',
+    'GLbitfield' : '0x%x',
+}
+def GetFormatString(type):
+    if FormatStrings.has_key(type):
+        return FormatStrings[type]
+    else:
+        return None
+
+
+######################################################################
+# Version-specific values to be used in the main script
+# header: which header file to include
+# api: what text specifies an API-level function
+VersionSpecificValues = {
+    'GLES1.1' : {
+        'description' : 'GLES1.1 functions',
+        'header' : 'GLES/gl.h',
+        'extheader' : 'GLES/glext.h',
+        'shortname' : 'es1'
+    },
+    'GLES2.0': {
+        'description' : 'GLES2.0 functions',
+        'header' : 'GLES2/gl2.h',
+        'extheader' : 'GLES2/gl2ext.h',
+        'shortname' : 'es2'
+    }
+}
+
+
+######################################################################
+# Main code for the script begins here.
+
+# Get the name of the program (without the directory part) for use in
+# error messages.
+program = os.path.basename(sys.argv[0])
+
+# Set default values
+verbose = 0
+functionList = "APIspec.xml"
+version = "GLES1.1"
+
+# Allow for command-line switches
+import getopt, time
+options = "hvV:S:"
+try:
+    optlist, args = getopt.getopt(sys.argv[1:], options)
+except getopt.GetoptError, message:
+    sys.stderr.write("%s: %s.  Use -h for help.\n" % (program, message))
+    sys.exit(1)
+
+for option, optarg in optlist:
+    if option == "-h":
+        sys.stderr.write("Usage: %s [-%s]\n" % (program, options))
+        sys.stderr.write("Parse an API specification file and generate wrapper functions for a given GLES version\n")
+        sys.stderr.write("-h gives help\n")
+        sys.stderr.write("-v is verbose\n")
+        sys.stderr.write("-V specifies GLES version to generate [%s]:\n" % version)
+        for key in VersionSpecificValues.keys():
+            sys.stderr.write("    %s - %s\n" % (key, VersionSpecificValues[key]['description']))
+        sys.stderr.write("-S specifies API specification file to use [%s]\n" % functionList)
+        sys.exit(1)
+    elif option == "-v":
+        verbose += 1
+    elif option == "-V":
+        version = optarg
+    elif option == "-S":
+        functionList = optarg
+
+# Beyond switches, we support no further command-line arguments
+if len(args) >  0:
+    sys.stderr.write("%s: only switch arguments are supported - use -h for help\n" % program)
+    sys.exit(1)
+
+# If we don't have a valid version, abort.
+if not VersionSpecificValues.has_key(version):
+    sys.stderr.write("%s: version '%s' is not valid - use -h for help\n" % (program, version))
+    sys.exit(1)
+
+# Grab the version-specific items we need to use
+versionHeader = VersionSpecificValues[version]['header']
+versionExtHeader = VersionSpecificValues[version]['extheader']
+shortname = VersionSpecificValues[version]['shortname']
+
+# If we get to here, we're good to go.  The "version" parameter
+# directs GetDispatchedFunctions to only allow functions from
+# that "category" (version in our parlance).  This allows 
+# functions with different declarations in different categories
+# to exist (glTexImage2D, for example, is different between
+# GLES1 and GLES2).
+keys = apiutil.GetAllFunctions(functionList, version)
+
+allSpecials = apiutil.AllSpecials()
+
+print """/* DO NOT EDIT *************************************************
+ * THIS FILE AUTOMATICALLY GENERATED BY THE %s SCRIPT
+ * API specification file:   %s
+ * GLES version:             %s
+ * date:                     %s
+ */
+""" % (program, functionList, version, time.strftime("%Y-%m-%d %H:%M:%S"))
+
+# The headers we choose are version-specific.
+print """
+#include "%s"
+#include "%s"
+""" % (versionHeader, versionExtHeader)
+
+# Everyone needs these types.
+print """
+/* These types are needed for the Mesa veneer, but are not defined in
+ * the standard GLES headers.
+ */
+typedef double GLdouble;
+typedef double GLclampd;
+
+/* This type is normally in glext.h, but needed here */
+typedef char GLchar;
+
+/* Mesa error handling requires these */
+extern void *_mesa_get_current_context(void);
+extern void _mesa_error(void *ctx, GLenum error, const char *fmtString, ... );
+
+#include "main/compiler.h"
+#include "main/api_exec.h"
+#include "main/remap.h"
+
+#ifdef IN_DRI_DRIVER
+#define _GLAPI_USE_REMAP_TABLE
+#endif
+
+#include "es/glapi/glapi-%s/glapi/glapitable.h"
+#include "es/glapi/glapi-%s/glapi/glapioffsets.h"
+#include "es/glapi/glapi-%s/glapi/glapidispatch.h"
+
+#if FEATURE_remap_table
+
+#define need_MESA_remap_table
+
+#include "es/glapi/glapi-%s/main/remap_helper.h"
+
+void
+_mesa_init_remap_table_%s(void)
+{
+   _mesa_do_init_remap_table(_mesa_function_pool,
+                             driDispatchRemapTable_size,
+                             MESA_remap_table_functions);
+}
+
+void
+_mesa_map_static_functions_%s(void)
+{
+}
+
+#endif
+
+typedef void (*_glapi_proc)(void); /* generic function pointer */
+""" % (shortname, shortname, shortname, shortname, shortname, shortname);
+
+# Finally we get to the all-important functions
+print """/*************************************************************
+ * Generated functions begin here
+ */
+"""
+for funcName in keys:
+    if verbose > 0: sys.stderr.write("%s: processing function %s\n" % (program, funcName))
+
+    # start figuring out what this function will look like.
+    returnType = apiutil.ReturnType(funcName)
+    props = apiutil.Properties(funcName)
+    params = apiutil.Parameters(funcName)
+    declarationString = apiutil.MakeDeclarationString(params)
+
+    # In case of error, a function may have to return.  Make
+    # sure we have valid return values in this case.
+    if returnType == "void":
+        errorReturn = "return"
+    elif returnType == "GLboolean":
+        errorReturn = "return GL_FALSE"
+    else:
+        errorReturn = "return (%s) 0" % returnType
+
+    # These are the output of this large calculation block.
+    # passthroughDeclarationString: a typed set of parameters that
+    # will be used to create the "extern" reference for the
+    # underlying Mesa or support function.  Note that as generated
+    # these have an extra ", " at the beginning, which will be
+    # removed before use.
+    # 
+    # passthroughDeclarationString: an untyped list of parameters
+    # that will be used to call the underlying Mesa or support
+    # function (including references to converted parameters).
+    # This will also be generated with an extra ", " at the
+    # beginning, which will be removed before use.
+    #
+    # variables: C code to create any local variables determined to
+    # be necessary.
+    # conversionCodeOutgoing: C code to convert application parameters
+    # to a necessary type before calling the underlying support code.
+    # May be empty if no conversion is required.  
+    # conversionCodeIncoming: C code to do the converse: convert 
+    # values returned by underlying Mesa code to the types needed
+    # by the application.
+    # Note that *either* the conversionCodeIncoming will be used (for
+    # generated query functions), *or* the conversionCodeOutgoing will
+    # be used (for generated non-query functions), never both.
+    passthroughFuncName = ""
+    passthroughDeclarationString = ""
+    passthroughCallString = ""
+    prefixOverride = None
+    variables = []
+    conversionCodeOutgoing = []
+    conversionCodeIncoming = []
+    switchCode = []
+
+    # Calculate the name of the underlying support function to call.
+    # By default, the passthrough function is named _mesa_<funcName>.
+    # We're allowed to override the prefix and/or the function name
+    # for each function record, though.  The "ConversionFunction"
+    # utility is poorly named, BTW...
+    if funcName in allSpecials:
+        # perform checks and pass through
+        funcPrefix = "_check_"
+        aliasprefix = "_es_"
+    else:
+        funcPrefix = "_es_"
+        aliasprefix = apiutil.AliasPrefix(funcName)
+    alias = apiutil.ConversionFunction(funcName)
+    prefixOverride = apiutil.FunctionPrefix(funcName)
+    if prefixOverride != "_mesa_":
+        aliasprefix = apiutil.FunctionPrefix(funcName)
+    if not alias:
+        # There may still be a Mesa alias for the function
+        if apiutil.Alias(funcName):
+            passthroughFuncName = "%s%s" % (aliasprefix, apiutil.Alias(funcName))
+        else:
+            passthroughFuncName = "%s%s" % (aliasprefix, funcName)
+    else: # a specific alias is provided
+        passthroughFuncName = "%s%s" % (aliasprefix, alias)
+
+    # Look at every parameter: each one may have only specific
+    # allowed values, or dependent parameters to check, or 
+    # variant-sized vector arrays to calculate
+    for (paramName, paramType, paramMaxVecSize, paramConvertToType, paramValidValues, paramValueConversion) in params:
+        # We'll need this below if we're doing conversions
+        (paramBaseType, paramTypeModifiers) = GetBaseType(paramType)
+
+        # Conversion management.
+        # We'll handle three cases, easiest to hardest: a parameter
+        # that doesn't require conversion, a scalar parameter that
+        # requires conversion, and a vector parameter that requires
+        # conversion.
+        if paramConvertToType == None:
+            # Unconverted parameters are easy, whether they're vector
+            # or scalar - just add them to the call list.  No conversions
+            # or anything to worry about.
+            passthroughDeclarationString += ", %s %s" % (paramType, paramName)
+            passthroughCallString += ", %s" % paramName
+
+        elif paramMaxVecSize == 0: # a scalar parameter that needs conversion
+            # A scalar to hold a converted parameter
+            variables.append("    %s converted_%s;" % (paramConvertToType, paramName))
+
+            # Outgoing conversion depends on whether we have to conditionally
+            # perform value conversion.
+            if paramValueConversion == "none":
+                conversionCodeOutgoing.append("    converted_%s = (%s) %s;" % (paramName, paramConvertToType, paramName))
+            elif paramValueConversion == "some":
+                # We'll need a conditional variable to keep track of
+                # whether we're converting values or not.
+                if ("    int convert_%s_value = 1;" % paramName) not in variables:
+                    variables.append("    int convert_%s_value = 1;" % paramName)
+
+                # Write code based on that conditional.
+                conversionCodeOutgoing.append("    if (convert_%s_value) {" % paramName)
+                conversionCodeOutgoing.append("        converted_%s = %s;" % (paramName, ConvertValue(paramName, paramBaseType, paramConvertToType))) 
+                conversionCodeOutgoing.append("    } else {")
+                conversionCodeOutgoing.append("        converted_%s = (%s) %s;" % (paramName, paramConvertToType, paramName))
+                conversionCodeOutgoing.append("    }")
+            else: # paramValueConversion == "all"
+                conversionCodeOutgoing.append("    converted_%s = %s;" % (paramName, ConvertValue(paramName, paramBaseType, paramConvertToType)))
+
+            # Note that there can be no incoming conversion for a
+            # scalar parameter; changing the scalar will only change
+            # the local value, and won't ultimately change anything
+            # that passes back to the application.
+
+            # Call strings.  The unusual " ".join() call will join the
+            # array of parameter modifiers with spaces as separators.
+            passthroughDeclarationString += ", %s %s %s" % (paramConvertToType, " ".join(paramTypeModifiers), paramName)
+            passthroughCallString += ", converted_%s" % paramName
+
+        else: # a vector parameter that needs conversion
+            # We'll need an index variable for conversions
+            if "    register unsigned int i;" not in variables:
+                variables.append("    register unsigned int i;")
+
+            # This variable will hold the (possibly variant) size of
+            # this array needing conversion.  By default, we'll set
+            # it to the maximal size (which is correct for functions
+            # with a constant-sized vector parameter); for true
+            # variant arrays, we'll modify it with other code.
+            variables.append("    unsigned int n_%s = %d;" % (paramName, paramMaxVecSize))
+
+            # This array will hold the actual converted values.
+            variables.append("    %s converted_%s[%d];" % (paramConvertToType, paramName, paramMaxVecSize))
+
+            # Again, we choose the conversion code based on whether we
+            # have to always convert values, never convert values, or 
+            # conditionally convert values.
+            if paramValueConversion == "none":
+                conversionCodeOutgoing.append("    for (i = 0; i < n_%s; i++) {" % paramName)
+                conversionCodeOutgoing.append("        converted_%s[i] = (%s) %s[i];" % (paramName, paramConvertToType, paramName))
+                conversionCodeOutgoing.append("    }")
+            elif paramValueConversion == "some":
+                # We'll need a conditional variable to keep track of
+                # whether we're converting values or not.
+                if ("    int convert_%s_value = 1;" % paramName) not in variables:
+                    variables.append("    int convert_%s_value = 1;" % paramName)
+                # Write code based on that conditional.
+                conversionCodeOutgoing.append("    if (convert_%s_value) {" % paramName)
+                conversionCodeOutgoing.append("        for (i = 0; i < n_%s; i++) {" % paramName)
+                conversionCodeOutgoing.append("            converted_%s[i] = %s;" % (paramName, ConvertValue("%s[i]" % paramName, paramBaseType, paramConvertToType))) 
+                conversionCodeOutgoing.append("        }")
+                conversionCodeOutgoing.append("    } else {")
+                conversionCodeOutgoing.append("        for (i = 0; i < n_%s; i++) {" % paramName)
+                conversionCodeOutgoing.append("            converted_%s[i] = (%s) %s[i];" % (paramName, paramConvertToType, paramName))
+                conversionCodeOutgoing.append("        }")
+                conversionCodeOutgoing.append("    }")
+            else: # paramValueConversion == "all"
+                conversionCodeOutgoing.append("    for (i = 0; i < n_%s; i++) {" % paramName)
+                conversionCodeOutgoing.append("        converted_%s[i] = %s;" % (paramName, ConvertValue("%s[i]" % paramName, paramBaseType, paramConvertToType)))
+
+                conversionCodeOutgoing.append("    }")
+
+            # If instead we need an incoming conversion (i.e. results
+            # from Mesa have to be converted before handing back
+            # to the application), this is it.  Fortunately, we don't
+            # have to worry about conditional value conversion - the
+            # functions that do (e.g. glGetFixedv()) are handled
+            # specially, outside this code generation.
+            #
+            # Whether we use incoming conversion or outgoing conversion
+            # is determined later - we only ever use one or the other.
+
+            if paramValueConversion == "none":
+                conversionCodeIncoming.append("    for (i = 0; i < n_%s; i++) {" % paramName)
+                conversionCodeIncoming.append("        %s[i] = (%s) converted_%s[i];" % (paramName, paramConvertToType, paramName))
+                conversionCodeIncoming.append("    }")
+            elif paramValueConversion == "some":
+                # We'll need a conditional variable to keep track of
+                # whether we're converting values or not.
+                if ("    int convert_%s_value = 1;" % paramName) not in variables:
+                    variables.append("    int convert_%s_value = 1;" % paramName)
+
+                # Write code based on that conditional.
+                conversionCodeIncoming.append("    if (convert_%s_value) {" % paramName)
+                conversionCodeIncoming.append("        for (i = 0; i < n_%s; i++) {" % paramName)
+                conversionCodeIncoming.append("            %s[i] = %s;" % (paramName, ConvertValue("converted_%s[i]" % paramName, paramConvertToType, paramBaseType))) 
+                conversionCodeIncoming.append("        }")
+                conversionCodeIncoming.append("    } else {")
+                conversionCodeIncoming.append("        for (i = 0; i < n_%s; i++) {" % paramName)
+                conversionCodeIncoming.append("            %s[i] = (%s) converted_%s[i];" % (paramName, paramBaseType, paramName))
+                conversionCodeIncoming.append("        }")
+                conversionCodeIncoming.append("    }")
+            else: # paramValueConversion == "all"
+                conversionCodeIncoming.append("    for (i = 0; i < n_%s; i++) {" % paramName)
+                conversionCodeIncoming.append("        %s[i] = %s;" % (paramName, ConvertValue("converted_%s[i]" % paramName, paramConvertToType, paramBaseType)))
+                conversionCodeIncoming.append("    }")
+
+            # Call strings.  The unusual " ".join() call will join the
+            # array of parameter modifiers with spaces as separators.
+            passthroughDeclarationString += ", %s %s %s" % (paramConvertToType, " ".join(paramTypeModifiers), paramName)
+            passthroughCallString += ", converted_%s" % paramName
+
+        # endif conversion management
+
+        # Parameter checking.  If the parameter has a specific list of
+        # valid values, we have to make sure that the passed-in values
+        # match these, or we make an error.
+        if len(paramValidValues) > 0:
+            # We're about to make a big switch statement with an
+            # error at the end.  By default, the error is GL_INVALID_ENUM,
+            # unless we find a "case" statement in the middle with a
+            # non-GLenum value.
+            errorDefaultCase = "GL_INVALID_ENUM"
+
+            # This parameter has specific valid values.  Make a big
+            # switch statement to handle it.  Note that the original
+            # parameters are always what is checked, not the
+            # converted parameters.
+            switchCode.append("    switch(%s) {" % paramName)
+
+            for valueIndex in range(len(paramValidValues)):
+                (paramValue, dependentVecSize, dependentParamName, dependentValidValues, errorCode, valueConvert) = paramValidValues[valueIndex]
+
+                # We're going to need information on the dependent param
+                # as well.
+                if dependentParamName:
+                    depParamIndex = apiutil.FindParamIndex(params, dependentParamName)
+                    if depParamIndex == None:
+                        sys.stderr.write("%s: can't find dependent param '%s' for function '%s'\n" % (program, dependentParamName, funcName))
+
+                    (depParamName, depParamType, depParamMaxVecSize, depParamConvertToType, depParamValidValues, depParamValueConversion) = params[depParamIndex]
+                else:
+                    (depParamName, depParamType, depParamMaxVecSize, depParamConvertToType, depParamValidValues, depParamValueConversion) = (None, None, None, None, [], None)
+
+                # This is a sneaky trick.  It's valid syntax for a parameter
+                # that is *not* going to be converted to be declared
+                # with a dependent vector size; but in this case, the
+                # dependent vector size is unused and unnecessary.
+                # So check for this and ignore the dependent vector size
+                # if the parameter is not going to be converted.
+                if depParamConvertToType:
+                    usedDependentVecSize = dependentVecSize
+                else:
+                    usedDependentVecSize = None
+
+                # We'll peek ahead at the next parameter, to see whether
+                # we can combine cases
+                if valueIndex + 1 < len(paramValidValues) :
+                    (nextParamValue, nextDependentVecSize, nextDependentParamName, nextDependentValidValues, nextErrorCode, nextValueConvert) = paramValidValues[valueIndex + 1]
+                    if depParamConvertToType:
+                        usedNextDependentVecSize = nextDependentVecSize
+                    else:
+                        usedNextDependentVecSize = None
+
+                # Create a case for this value.  As a mnemonic,
+                # if we have a dependent vector size that we're ignoring,
+                # add it as a comment.
+                if usedDependentVecSize == None and dependentVecSize != None:
+                    switchCode.append("        case %s: /* size %s */" % (paramValue, dependentVecSize))
+                else:
+                    switchCode.append("        case %s:" % paramValue)
+
+                # If this is not a GLenum case, then switch our error
+                # if no value is matched to be GL_INVALID_VALUE instead
+                # of GL_INVALID_ENUM.  (Yes, this does get confused
+                # if there are both values and GLenums in the same
+                # switch statement, which shouldn't happen.)
+                if paramValue[0:3] != "GL_":
+                    errorDefaultCase = "GL_INVALID_VALUE"
+
+                # If all the remaining parameters are identical to the
+                # next set, then we're done - we'll just create the
+                # official code on the next pass through, and the two
+                # cases will share the code.
+                if valueIndex + 1 < len(paramValidValues) and usedDependentVecSize == usedNextDependentVecSize and dependentParamName == nextDependentParamName and dependentValidValues == nextDependentValidValues and errorCode == nextErrorCode and valueConvert == nextValueConvert:
+                    continue
+
+                # Otherwise, we'll have to generate code for this case.
+                # Start off with a check: if there is a dependent parameter,
+                # and a list of valid values for that parameter, we need
+                # to generate an error if something other than one
+                # of those values is passed.
+                if len(dependentValidValues) > 0:
+                    conditional=""
+
+                    # If the parameter being checked is actually an array,
+                    # check only its first element.
+                    if depParamMaxVecSize == 0:
+                        valueToCheck = dependentParamName
+                    else:
+                        valueToCheck = "%s[0]" % dependentParamName
+
+                    for v in dependentValidValues:
+                        conditional += " && %s != %s" % (valueToCheck, v)
+                    switchCode.append("            if (%s) {" % conditional[4:])
+                    if errorCode == None:
+                        errorCode = "GL_INVALID_ENUM"
+                    switchCode.append('                _mesa_error(_mesa_get_current_context(), %s, "gl%s(%s=0x%s)", %s);' % (errorCode, funcName, paramName, "%x", paramName))
+                    switchCode.append("                %s;" % errorReturn)
+                    switchCode.append("            }")
+                # endif there are dependent valid values
+
+                # The dependent parameter may require conditional
+                # value conversion.  If it does, and we don't want
+                # to convert values, we'll have to generate code for that
+                if depParamValueConversion == "some" and valueConvert == "noconvert":
+                    switchCode.append("            convert_%s_value = 0;" % dependentParamName)
+
+                # If there's a dependent vector size for this parameter
+                # that we're actually going to use (i.e. we need conversion),
+                # mark it.
+                if usedDependentVecSize:
+                    switchCode.append("            n_%s = %s;" % (dependentParamName, dependentVecSize))
+
+                # In all cases, break out of the switch if any valid
+                # value is found.
+                switchCode.append("            break;")
+
+
+            # Need a default case to catch all the other, invalid
+            # parameter values.  These will all generate errors.
+            switchCode.append("        default:")
+            if errorCode == None:
+                errorCode = "GL_INVALID_ENUM"
+            formatString = GetFormatString(paramType)
+            if formatString == None:
+                switchCode.append('            _mesa_error(_mesa_get_current_context(), %s, "gl%s(%s)");' % (errorCode, funcName, paramName))
+            else:
+                switchCode.append('            _mesa_error(_mesa_get_current_context(), %s, "gl%s(%s=%s)", %s);' % (errorCode, funcName, paramName, formatString, paramName))
+            switchCode.append("            %s;" % errorReturn)
+
+            # End of our switch code.
+            switchCode.append("    }")
+
+        # endfor every recognized parameter value
+
+    # endfor every param
+
+    # Here, the passthroughDeclarationString and passthroughCallString
+    # are complete; remove the extra ", " at the front of each.
+    passthroughDeclarationString = passthroughDeclarationString[2:]
+    passthroughCallString = passthroughCallString[2:]
+
+    # The Mesa functions are scattered across all the Mesa
+    # header files.  The easiest way to manage declarations
+    # is to create them ourselves.
+    if funcName in allSpecials:
+        print "/* this function is special and is defined elsewhere */"
+    print "extern %s GLAPIENTRY %s(%s);" % (returnType, passthroughFuncName, passthroughDeclarationString)
+
+    # A function may be a core function (i.e. it exists in
+    # the core specification), a core addition (extension
+    # functions added officially to the core), a required
+    # extension (usually an extension for an earlier version
+    # that has been officially adopted), or an optional extension.
+    #
+    # Core functions have a simple category (e.g. "GLES1.1");
+    # we generate only a simple callback for them.
+    #
+    # Core additions have two category listings, one simple
+    # and one compound (e.g.  ["GLES1.1", "GLES1.1:OES_fixed_point"]).  
+    # We generate the core function, and also an extension function.
+    #
+    # Required extensions and implemented optional extensions
+    # have a single compound category "GLES1.1:OES_point_size_array".
+    # For these we generate just the extension function.
+    for categorySpec in apiutil.Categories(funcName):
+        compoundCategory = categorySpec.split(":")
+
+        # This category isn't for us, if the base category doesn't match
+        # our version
+        if compoundCategory[0] != version:
+            continue
+
+        # Otherwise, determine if we're writing code for a core
+        # function (no suffix) or an extension function.
+        if len(compoundCategory) == 1:
+            # This is a core function
+            extensionName = None
+            extensionSuffix = ""
+        else:
+            # This is an extension function.  We'll need to append
+            # the extension suffix.
+            extensionName = compoundCategory[1]
+            extensionSuffix = extensionName.split("_")[0]
+        fullFuncName = funcPrefix + funcName + extensionSuffix
+
+        # Now the generated function.  The text used to mark an API-level
+        # function, oddly, is version-specific.
+        if extensionName:
+            print "/* Extension %s */" % extensionName
+
+        if (not variables and
+            not switchCode and
+            not conversionCodeOutgoing and
+            not conversionCodeIncoming):
+            # pass through directly
+            print "#define %s %s" % (fullFuncName, passthroughFuncName)
+            print
+            continue
+
+        print "static %s %s(%s)" % (returnType, fullFuncName, declarationString)
+        print "{"
+
+        # Start printing our code pieces.  Start with any local
+        # variables we need.  This unusual syntax joins the 
+        # lines in the variables[] array with the "\n" separator.
+        if len(variables) > 0:
+            print "\n".join(variables) + "\n"
+
+        # If there's any sort of parameter checking or variable
+        # array sizing, the switch code will contain it.
+        if len(switchCode) > 0:
+            print "\n".join(switchCode) + "\n"
+
+        # In the case of an outgoing conversion (i.e. parameters must
+        # be converted before calling the underlying Mesa function),
+        # use the appropriate code.
+        if "get" not in props and len(conversionCodeOutgoing) > 0:
+            print "\n".join(conversionCodeOutgoing) + "\n"
+
+        # Call the Mesa function.  Note that there are very few functions
+        # that return a value (i.e. returnType is not "void"), and that
+        # none of them require incoming translation; so we're safe
+        # to generate code that directly returns in those cases,
+        # even though it's not completely independent.
+
+        if returnType == "void":
+            print "    %s(%s);" % (passthroughFuncName, passthroughCallString)
+        else:
+            print "    return %s(%s);" % (passthroughFuncName, passthroughCallString)
+
+        # If the function is one that returns values (i.e. "get" in props),
+        # it might return values of a different type than we need, that
+        # require conversion before passing back to the application.
+        if "get" in props and len(conversionCodeIncoming) > 0:
+            print "\n".join(conversionCodeIncoming)
+
+        # All done.
+        print "}"
+        print
+    # end for each category provided for a function
+
+# end for each function
+
+print """
+struct _glapi_table *
+_mesa_create_exec_table_%s(void)
+{
+   struct _glapi_table *exec;
+   exec = _mesa_alloc_dispatch_table(sizeof *exec);
+   if (exec == NULL)
+      return NULL;
+
+""" % shortname
+
+for func in keys:
+    prefix = "_es_" if func not in allSpecials else "_check_"
+    for spec in apiutil.Categories(func):
+        ext = spec.split(":")
+        # version does not match
+        if ext.pop(0) != version:
+            continue
+        entry = func
+        if ext:
+            suffix = ext[0].split("_")[0]
+            entry += suffix
+        print "    SET_%s(exec, %s%s);" % (entry, prefix, entry)
+print ""
+print "   return exec;"
+print "}"