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Diffstat (limited to 'mesalib/src/mesa/main/es_generator.py')
| -rw-r--r-- | mesalib/src/mesa/main/es_generator.py | 743 |
1 files changed, 743 insertions, 0 deletions
diff --git a/mesalib/src/mesa/main/es_generator.py b/mesalib/src/mesa/main/es_generator.py new file mode 100644 index 000000000..ecb34bb5c --- /dev/null +++ b/mesalib/src/mesa/main/es_generator.py @@ -0,0 +1,743 @@ +#************************************************************************* +# 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" +#include "main/mfeatures.h" + +#if FEATURE_%s +""" % (versionHeader, versionExtHeader, shortname.upper()) + +# 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; + +/* 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" + +/* cannot include main/dispatch.h here */ +#ifdef IN_DRI_DRIVER +#define _GLAPI_USE_REMAP_TABLE +#endif +/* glapi uses GLAPIENTRY while GLES headers define GL_APIENTRY */ +#ifndef GLAPIENTRY +#define GLAPIENTRY GL_APIENTRY +#endif +#include "%sapi/glapi/glapitable.h" +#include "%sapi/glapi/glapioffsets.h" +#include "%sapi/glapi/glapidispatch.h" + +#if FEATURE_remap_table + +#if !FEATURE_GL +int driDispatchRemapTable[driDispatchRemapTable_size]; +#endif + +#define need_MESA_remap_table + +#include "%sapi/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:] + if not passthroughDeclarationString: + passthroughDeclarationString = "void" + + # 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 GL_APIENTRY %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 GL_APIENTRY %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 "}" + +print """ +#endif /* FEATURE_%s */""" % (shortname.upper()) |