| 1 | # Copyright (c) 2001, Stanford University
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| 2 | # All rights reserved.
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| 3 | #
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| 4 | # See the file LICENSE.txt for information on redistributing this software.
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| 5 |
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| 6 | # This script generates the packer.c file from the gl_header.parsed file.
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| 7 |
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| 8 | import sys, string, re
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| 9 |
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| 10 | import apiutil
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| 11 |
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| 12 |
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| 13 |
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| 14 | def WriteData( offset, arg_type, arg_name, is_swapped ):
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| 15 | """Return a string to write a variable to the packing buffer."""
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| 16 | retval = 9
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| 17 | if apiutil.IsPointer(arg_type):
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| 18 | retval = "\tWRITE_NETWORK_POINTER( %d, (void *) %s );" % (offset, arg_name )
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| 19 | else:
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| 20 | if is_swapped:
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| 21 | if arg_type == "GLfloat" or arg_type == "GLclampf":
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| 22 | retval = "\tWRITE_DATA( %d, GLuint, SWAPFLOAT(%s) );" % (offset, arg_name)
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| 23 | elif arg_type == "GLdouble" or arg_type == "GLclampd":
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| 24 | retval = "\tWRITE_SWAPPED_DOUBLE( %d, %s );" % (offset, arg_name)
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| 25 | elif apiutil.sizeof(arg_type) == 1:
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| 26 | retval = "\tWRITE_DATA( %d, %s, %s );" % (offset, arg_type, arg_name)
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| 27 | elif apiutil.sizeof(arg_type) == 2:
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| 28 | retval = "\tWRITE_DATA( %d, %s, SWAP16(%s) );" % (offset, arg_type, arg_name)
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| 29 | elif apiutil.sizeof(arg_type) == 4:
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| 30 | retval = "\tWRITE_DATA( %d, %s, SWAP32(%s) );" % (offset, arg_type, arg_name)
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| 31 | else:
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| 32 | if arg_type == "GLdouble" or arg_type == "GLclampd":
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| 33 | retval = "\tWRITE_DOUBLE( %d, %s );" % (offset, arg_name)
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| 34 | else:
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| 35 | retval = "\tWRITE_DATA( %d, %s, %s );" % (offset, arg_type, arg_name)
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| 36 | if retval == 9:
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| 37 | print >>sys.stderr, "no retval for %s %s" % (arg_name, arg_type)
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| 38 | assert 0
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| 39 | return retval
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| 40 |
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| 41 |
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| 42 | def UpdateCurrentPointer( func_name ):
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| 43 | m = re.search( r"^(Color|Normal)([1234])(ub|b|us|s|ui|i|f|d)$", func_name )
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| 44 | if m :
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| 45 | k = m.group(1)
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| 46 | name = '%s%s' % (k[:1].lower(),k[1:])
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| 47 | type = m.group(3) + m.group(2)
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| 48 | print "\tpc->current.c.%s.%s = data_ptr;" % (name,type)
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| 49 | return
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| 50 |
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| 51 | m = re.search( r"^(SecondaryColor)(3)(ub|b|us|s|ui|i|f|d)EXT$", func_name )
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| 52 | if m :
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| 53 | k = m.group(1)
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| 54 | name = 'secondaryColor'
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| 55 | type = m.group(3) + m.group(2)
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| 56 | print "\tpc->current.c.%s.%s = data_ptr;" % (name,type)
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| 57 | return
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| 58 |
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| 59 | m = re.search( r"^(TexCoord)([1234])(ub|b|us|s|ui|i|f|d)$", func_name )
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| 60 | if m :
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| 61 | k = m.group(1)
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| 62 | name = 'texCoord'
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| 63 | type = m.group(3) + m.group(2)
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| 64 | print "\tpc->current.c.%s.%s[0] = data_ptr;" % (name,type)
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| 65 | return
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| 66 |
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| 67 | m = re.search( r"^(MultiTexCoord)([1234])(ub|b|us|s|ui|i|f|d)ARB$", func_name )
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| 68 | if m :
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| 69 | k = m.group(1)
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| 70 | name = 'texCoord'
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| 71 | type = m.group(3) + m.group(2)
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| 72 | print "\tpc->current.c.%s.%s[texture-GL_TEXTURE0_ARB] = data_ptr + 4;" % (name,type)
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| 73 | return
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| 74 |
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| 75 | m = re.match( r"^(Index)(ub|b|us|s|ui|i|f|d)$", func_name )
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| 76 | if m :
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| 77 | k = m.group(1)
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| 78 | name = 'index'
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| 79 | type = m.group(2) + "1"
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| 80 | print "\tpc->current.c.%s.%s = data_ptr;" % (name,type)
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| 81 | return
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| 82 |
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| 83 | m = re.match( r"^(EdgeFlag)$", func_name )
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| 84 | if m :
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| 85 | k = m.group(1)
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| 86 | name = 'edgeFlag'
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| 87 | type = "l1"
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| 88 | print "\tpc->current.c.%s.%s = data_ptr;" % (name,type)
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| 89 | return
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| 90 |
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| 91 | m = re.match( r"^(FogCoord)(f|d)EXT$", func_name )
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| 92 | if m :
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| 93 | k = m.group(1)
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| 94 | name = 'fogCoord'
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| 95 | type = m.group(2) + "1"
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| 96 | print "\tpc->current.c.%s.%s = data_ptr;" % (name,type)
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| 97 | return
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| 98 |
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| 99 |
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| 100 | m = re.search( r"^(VertexAttrib)([1234])N?(ub|b|s|f|d)(NV|ARB)$", func_name )
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| 101 | if m :
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| 102 | k = m.group(1)
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| 103 | name = 'vertexAttrib'
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| 104 | type = m.group(3) + m.group(2)
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| 105 | # Add 12 to skip the packet length, opcode and index fields
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| 106 | print "\tpc->current.c.%s.%s[index] = data_ptr + 12;" % (name,type)
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| 107 | if m.group(4) == "ARB" or m.group(4) == "NV":
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| 108 | print "\tpc->current.attribsUsedMask |= (1 << index);"
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| 109 | return
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| 110 |
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| 111 |
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| 112 |
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| 113 | def PrintFunc( func_name, params, is_swapped, can_have_pointers ):
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| 114 | """Emit a packer function."""
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| 115 | if is_swapped:
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| 116 | print 'void PACK_APIENTRY crPack%sSWAP( %s )' % (func_name, apiutil.MakeDeclarationString(params))
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| 117 | else:
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| 118 | print 'void PACK_APIENTRY crPack%s( %s )' % (func_name, apiutil.MakeDeclarationString(params))
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| 119 | print '{'
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| 120 | print '\tCR_GET_PACKER_CONTEXT(pc);'
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| 121 |
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| 122 | # Save original function name
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| 123 | orig_func_name = func_name
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| 124 |
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| 125 | # Convert to a non-vector version of the function if possible
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| 126 | func_name = apiutil.NonVectorFunction( func_name )
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| 127 | if not func_name:
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| 128 | func_name = orig_func_name
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| 129 |
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| 130 | # Check if there are any pointer parameters.
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| 131 | # That's usually a problem so we'll emit an error function.
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| 132 | nonVecParams = apiutil.Parameters(func_name)
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| 133 | bail_out = 0
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| 134 | for (name, type, vecSize) in nonVecParams:
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| 135 | if apiutil.IsPointer(type) and vecSize == 0 and not can_have_pointers:
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| 136 | bail_out = 1
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| 137 | if bail_out:
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| 138 | for (name, type, vecSize) in nonVecParams:
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| 139 | print '\t(void)%s;' % (name)
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| 140 | print '\tcrError ( "%s needs to be special cased %d %d!");' % (func_name, vecSize, can_have_pointers)
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| 141 | print '\t(void) pc;'
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| 142 | print '}'
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| 143 | # XXX we should really abort here
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| 144 | return
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| 145 |
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| 146 | if "extpack" in apiutil.ChromiumProps(func_name):
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| 147 | is_extended = 1
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| 148 | else:
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| 149 | is_extended = 0
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| 150 |
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| 151 |
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| 152 | print "\tunsigned char *data_ptr;"
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| 153 | print '\t(void) pc;'
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| 154 | #if func_name == "Enable" or func_name == "Disable":
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| 155 | # print "\tCRASSERT(!pc->buffer.geometry_only); /* sanity check */"
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| 156 |
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| 157 | for index in range(0,len(params)):
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| 158 | (name, type, vecSize) = params[index]
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| 159 | if vecSize>0 and func_name!=orig_func_name:
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| 160 | print " if (!%s) {" % name
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| 161 | # Know the reason for this one, so avoid the spam.
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| 162 | if orig_func_name != "SecondaryColor3fvEXT":
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| 163 | print " crDebug(\"App passed NULL as %s for %s\");" % (name, orig_func_name)
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| 164 | print " return;"
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| 165 | print " }"
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| 166 |
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| 167 | packet_length = apiutil.PacketLength(nonVecParams)
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| 168 |
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| 169 | if packet_length == 0 and not is_extended:
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| 170 | print "\tCR_GET_BUFFERED_POINTER_NO_ARGS( pc );"
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| 171 | elif func_name[:9] == "Translate" or func_name[:5] == "Color":
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| 172 | # XXX WTF is the purpose of this?
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| 173 | if is_extended:
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| 174 | packet_length += 8
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| 175 | print "\tCR_GET_BUFFERED_POINTER_NO_BEGINEND_FLUSH( pc, %d, GL_TRUE );" % packet_length
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| 176 | else:
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| 177 | if is_extended:
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| 178 | packet_length += 8
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| 179 | print "\tCR_GET_BUFFERED_POINTER( pc, %d );" % packet_length
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| 180 | UpdateCurrentPointer( func_name )
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| 181 |
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| 182 | if is_extended:
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| 183 | counter = 8
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| 184 | print WriteData( 0, 'GLint', packet_length, is_swapped )
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| 185 | print WriteData( 4, 'GLenum', apiutil.ExtendedOpcodeName( func_name ), is_swapped )
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| 186 | else:
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| 187 | counter = 0
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| 188 |
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| 189 | # Now emit the WRITE_() macros for all parameters
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| 190 | for index in range(0,len(params)):
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| 191 | (name, type, vecSize) = params[index]
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| 192 | # if we're converting a vector-valued function to a non-vector func:
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| 193 | if vecSize > 0 and func_name != orig_func_name:
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| 194 | ptrType = apiutil.PointerType(type)
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| 195 | for i in range(0, vecSize):
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| 196 | print WriteData( counter + i * apiutil.sizeof(ptrType),
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| 197 | ptrType, "%s[%d]" % (name, i), is_swapped )
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| 198 | # XXX increment counter here?
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| 199 | else:
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| 200 | print WriteData( counter, type, name, is_swapped )
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| 201 | if apiutil.IsPointer(type):
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| 202 | counter += apiutil.PointerSize()
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| 203 | else:
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| 204 | counter += apiutil.sizeof(type)
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| 205 |
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| 206 | # finish up
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| 207 | if is_extended:
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| 208 | print "\tWRITE_OPCODE( pc, CR_EXTEND_OPCODE );"
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| 209 | else:
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| 210 | print "\tWRITE_OPCODE( pc, %s );" % apiutil.OpcodeName( func_name )
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| 211 |
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| 212 | print '\tCR_UNLOCK_PACKER_CONTEXT(pc);'
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| 213 | print '}\n'
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| 214 |
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| 215 |
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| 216 |
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| 217 |
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| 218 | apiutil.CopyrightC()
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| 219 |
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| 220 | print """
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| 221 | /* DO NOT EDIT - THIS FILE GENERATED BY THE packer.py SCRIPT */
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| 222 |
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| 223 | /* For each of the OpenGL functions we have a packer function which
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| 224 | * packs the function's opcode and arguments into a buffer.
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| 225 | */
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| 226 |
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| 227 | #include "packer.h"
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| 228 | #include "cr_opcodes.h"
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| 229 |
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| 230 | """
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| 231 |
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| 232 |
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| 233 | keys = apiutil.GetDispatchedFunctions(sys.argv[1]+"/APIspec.txt")
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| 234 |
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| 235 | for func_name in keys:
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| 236 | if apiutil.FindSpecial( "packer", func_name ):
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| 237 | continue
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| 238 |
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| 239 | if not apiutil.HasPackOpcode(func_name):
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| 240 | continue
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| 241 |
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| 242 | pointers_ok = 0
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| 243 |
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| 244 | return_type = apiutil.ReturnType(func_name)
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| 245 | params = apiutil.Parameters(func_name)
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| 246 |
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| 247 | if return_type != 'void':
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| 248 | # Yet another gross hack for glGetString
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| 249 | if string.find( return_type, '*' ) == -1:
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| 250 | return_type = return_type + " *"
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| 251 | params.append(("return_value", return_type, 0))
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| 252 |
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| 253 | if "get" in apiutil.Properties(func_name):
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| 254 | pointers_ok = 1
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| 255 | params.append(("writeback", "int *", 0))
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| 256 |
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| 257 | if func_name == 'Writeback':
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| 258 | pointers_ok = 1
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| 259 |
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| 260 | PrintFunc( func_name, params, 0, pointers_ok )
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| 261 | PrintFunc( func_name, params, 1, pointers_ok )
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