| 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 | from __future__ import print_function
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| 9 | import sys, string, re
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| 10 |
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| 11 | import apiutil
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| 12 |
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| 13 |
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| 14 |
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| 15 | def WriteData( offset, arg_type, arg_name, is_swapped ):
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| 16 | """Return a string to write a variable to the packing buffer."""
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| 17 | retval = 9
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| 18 | if apiutil.IsPointer(arg_type):
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| 19 | retval = "\tWRITE_NETWORK_POINTER(%d, (void *) %s);" % (offset, arg_name )
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| 20 | else:
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| 21 | if is_swapped:
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| 22 | if arg_type == "GLfloat" or arg_type == "GLclampf":
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| 23 | retval = "\tWRITE_DATA(%d, GLuint, SWAPFLOAT(%s));" % (offset, arg_name)
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| 24 | elif arg_type == "GLdouble" or arg_type == "GLclampd":
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| 25 | retval = "\tWRITE_SWAPPED_DOUBLE(%d, %s);" % (offset, arg_name)
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| 26 | elif apiutil.sizeof(arg_type) == 1:
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| 27 | retval = "\tWRITE_DATA(%d, %s, %s);" % (offset, arg_type, arg_name)
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| 28 | elif apiutil.sizeof(arg_type) == 2:
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| 29 | retval = "\tWRITE_DATA(%d, %s, SWAP16(%s));" % (offset, arg_type, arg_name)
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| 30 | elif apiutil.sizeof(arg_type) == 4:
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| 31 | retval = "\tWRITE_DATA(%d, %s, SWAP32(%s));" % (offset, arg_type, arg_name)
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| 32 | else:
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| 33 | if arg_type == "GLdouble" or arg_type == "GLclampd":
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| 34 | retval = "\tWRITE_DOUBLE(%d, %s);" % (offset, arg_name)
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| 35 | else:
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| 36 | retval = "\tWRITE_DATA(%d, %s, %s);" % (offset, arg_type, arg_name)
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| 37 | if retval == 9:
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| 38 | print >>sys.stderr, "no retval for %s %s" % (arg_name, arg_type)
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| 39 | assert 0
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| 40 | return retval
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| 41 |
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| 42 |
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| 43 | def UpdateCurrentPointer( func_name ):
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| 44 | m = re.search( r"^(Color|Normal)([1234])(ub|b|us|s|ui|i|f|d)$", func_name )
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| 45 | if m :
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| 46 | k = m.group(1)
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| 47 | name = '%s%s' % (k[:1].lower(),k[1:])
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| 48 | type = m.group(3) + m.group(2)
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| 49 | print("\tpc->current.c.%s.%s = data_ptr;" % (name,type))
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| 50 | return
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| 51 |
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| 52 | m = re.search( r"^(SecondaryColor)(3)(ub|b|us|s|ui|i|f|d)EXT$", func_name )
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| 53 | if m :
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| 54 | k = m.group(1)
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| 55 | name = 'secondaryColor'
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| 56 | type = m.group(3) + m.group(2)
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| 57 | print("\tpc->current.c.%s.%s = data_ptr;" % (name,type))
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| 58 | return
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| 59 |
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| 60 | m = re.search( r"^(TexCoord)([1234])(ub|b|us|s|ui|i|f|d)$", func_name )
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| 61 | if m :
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| 62 | k = m.group(1)
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| 63 | name = 'texCoord'
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| 64 | type = m.group(3) + m.group(2)
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| 65 | print("\tpc->current.c.%s.%s[0] = data_ptr;" % (name,type))
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| 66 | return
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| 67 |
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| 68 | m = re.search( r"^(MultiTexCoord)([1234])(ub|b|us|s|ui|i|f|d)ARB$", func_name )
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| 69 | if m :
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| 70 | k = m.group(1)
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| 71 | name = 'texCoord'
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| 72 | type = m.group(3) + m.group(2)
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| 73 | print("\tpc->current.c.%s.%s[texture-GL_TEXTURE0_ARB] = data_ptr + 4;" % (name,type))
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| 74 | return
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| 75 |
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| 76 | m = re.match( r"^(Index)(ub|b|us|s|ui|i|f|d)$", func_name )
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| 77 | if m :
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| 78 | k = m.group(1)
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| 79 | name = 'index'
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| 80 | type = m.group(2) + "1"
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| 81 | print("\tpc->current.c.%s.%s = data_ptr;" % (name,type))
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| 82 | return
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| 83 |
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| 84 | m = re.match( r"^(EdgeFlag)$", func_name )
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| 85 | if m :
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| 86 | k = m.group(1)
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| 87 | name = 'edgeFlag'
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| 88 | type = "l1"
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| 89 | print("\tpc->current.c.%s.%s = data_ptr;" % (name,type))
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| 90 | return
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| 91 |
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| 92 | m = re.match( r"^(FogCoord)(f|d)EXT$", func_name )
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| 93 | if m :
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| 94 | k = m.group(1)
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| 95 | name = 'fogCoord'
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| 96 | type = m.group(2) + "1"
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| 97 | print("\tpc->current.c.%s.%s = data_ptr;" % (name,type))
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| 98 | return
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| 99 |
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| 100 |
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| 101 | m = re.search( r"^(VertexAttrib)([1234])N?(ub|b|s|f|d)(NV|ARB)$", func_name )
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| 102 | if m :
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| 103 | k = m.group(1)
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| 104 | name = 'vertexAttrib'
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| 105 | type = m.group(3) + m.group(2)
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| 106 | # Add 12 to skip the packet length, opcode and index fields
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| 107 | print("\tpc->current.c.%s.%s[index] = data_ptr + 4;" % (name,type))
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| 108 | if m.group(4) == "ARB" or m.group(4) == "NV":
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| 109 | print("\tpc->current.attribsUsedMask |= (1 << index);")
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| 110 | print("\tpc->current.changedVertexAttrib |= (1 << index);")
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| 111 | return
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| 112 |
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| 113 |
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| 114 |
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| 115 | def PrintFunc( func_name, params, is_swapped, can_have_pointers ):
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| 116 | """Emit a packer function."""
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| 117 | if is_swapped:
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| 118 | print('void PACK_APIENTRY crPack%sSWAP(%s)' % (func_name, apiutil.MakeDeclarationStringWithContext('CR_PACKER_CONTEXT', params)))
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| 119 | else:
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| 120 | print('void PACK_APIENTRY crPack%s(%s)' % (func_name, apiutil.MakeDeclarationStringWithContext('CR_PACKER_CONTEXT', params)))
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| 121 | print('{')
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| 122 | print('\tCR_GET_PACKER_CONTEXT(pc);')
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| 123 |
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| 124 | # Save original function name
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| 125 | orig_func_name = func_name
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| 126 |
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| 127 | # Convert to a non-vector version of the function if possible
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| 128 | func_name = apiutil.NonVectorFunction( func_name )
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| 129 | if not func_name:
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| 130 | func_name = orig_func_name
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| 131 |
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| 132 | # Check if there are any pointer parameters.
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| 133 | # That's usually a problem so we'll emit an error function.
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| 134 | nonVecParams = apiutil.Parameters(func_name)
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| 135 | bail_out = 0
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| 136 | for (name, type, vecSize) in nonVecParams:
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| 137 | if apiutil.IsPointer(type) and vecSize == 0 and not can_have_pointers:
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| 138 | bail_out = 1
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| 139 | if bail_out:
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| 140 | for (name, type, vecSize) in nonVecParams:
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| 141 | print('\t(void)%s;' % (name))
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| 142 | print('\tcrError ( "%s needs to be special cased %d %d!");' % (func_name, vecSize, can_have_pointers))
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| 143 | print('\t(void) pc;')
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| 144 | print('}')
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| 145 | # XXX we should really abort here
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| 146 | return
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| 147 |
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| 148 | if "extpack" in apiutil.ChromiumProps(func_name):
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| 149 | is_extended = 1
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| 150 | else:
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| 151 | is_extended = 0
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| 152 |
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| 153 |
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| 154 | print("\tunsigned char *data_ptr = NULL;")
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| 155 | print('\t(void) pc;')
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| 156 | #if func_name == "Enable" or func_name == "Disable":
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| 157 | # print "\tCRASSERT(!pc->buffer.geometry_only); /* sanity check */"
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| 158 |
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| 159 | for index in range(0,len(params)):
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| 160 | (name, type, vecSize) = params[index]
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| 161 | if vecSize>0 and func_name!=orig_func_name:
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| 162 | print(" if (!%s) {" % name)
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| 163 | # Know the reason for this one, so avoid the spam.
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| 164 | if orig_func_name != "SecondaryColor3fvEXT":
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| 165 | print(" crDebug(\"App passed NULL as %s for %s\");" % (name, orig_func_name))
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| 166 | print(" return;")
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| 167 | print(" }")
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| 168 |
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| 169 | packet_length = apiutil.PacketLength(nonVecParams)
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| 170 |
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| 171 | if packet_length == 0 and not is_extended:
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| 172 | print("\tCR_GET_BUFFERED_POINTER_NO_ARGS(pc);")
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| 173 | elif func_name[:9] == "Translate" or func_name[:5] == "Color":
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| 174 | # XXX WTF is the purpose of this?
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| 175 | if is_extended:
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| 176 | packet_length += 8
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| 177 | print("\tCR_GET_BUFFERED_POINTER_NO_BEGINEND_FLUSH(pc, %d, GL_TRUE);" % packet_length)
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| 178 | else:
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| 179 | if is_extended:
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| 180 | packet_length += 8
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| 181 | print("\tCR_GET_BUFFERED_POINTER(pc, %d);" % packet_length)
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| 182 | UpdateCurrentPointer( func_name )
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| 183 |
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| 184 | if is_extended:
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| 185 | counter = 8
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| 186 | print(WriteData( 0, 'GLint', packet_length, is_swapped ))
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| 187 | print(WriteData( 4, 'GLenum', apiutil.ExtendedOpcodeName( func_name ), is_swapped ))
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| 188 | else:
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| 189 | counter = 0
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| 190 |
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| 191 | # Now emit the WRITE_() macros for all parameters
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| 192 | for index in range(0,len(params)):
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| 193 | (name, type, vecSize) = params[index]
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| 194 | # if we're converting a vector-valued function to a non-vector func:
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| 195 | if vecSize > 0 and func_name != orig_func_name:
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| 196 | ptrType = apiutil.PointerType(type)
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| 197 | for i in range(0, vecSize):
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| 198 | print(WriteData( counter + i * apiutil.sizeof(ptrType),
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| 199 | ptrType, "%s[%d]" % (name, i), is_swapped ))
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| 200 | # XXX increment counter here?
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| 201 | else:
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| 202 | print(WriteData( counter, type, name, is_swapped ))
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| 203 | if apiutil.IsPointer(type):
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| 204 | counter += apiutil.PointerSize()
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| 205 | else:
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| 206 | counter += apiutil.sizeof(type)
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| 207 |
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| 208 | # finish up
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| 209 | if is_extended:
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| 210 | print("\tWRITE_OPCODE(pc, CR_EXTEND_OPCODE);")
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| 211 | else:
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| 212 | print("\tWRITE_OPCODE(pc, %s);" % apiutil.OpcodeName( func_name ))
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| 213 |
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| 214 | if "get" in apiutil.Properties(func_name):
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| 215 | print('\tCR_CMDBLOCK_CHECK_FLUSH(pc);')
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| 216 |
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| 217 | print('\tCR_UNLOCK_PACKER_CONTEXT(pc);')
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| 218 | print('}\n')
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| 219 |
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| 220 |
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| 221 | r0_funcs = [ 'ChromiumParameteriCR', 'WindowSize', 'WindowShow', 'WindowPosition' ]
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| 222 |
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| 223 |
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| 224 | apiutil.CopyrightC()
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| 225 |
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| 226 | print("""
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| 227 | /* DO NOT EDIT - THIS FILE GENERATED BY THE packer.py SCRIPT */
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| 228 |
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| 229 | /* For each of the OpenGL functions we have a packer function which
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| 230 | * packs the function's opcode and arguments into a buffer.
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| 231 | */
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| 232 |
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| 233 | #include "packer.h"
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| 234 | #include "cr_opcodes.h"
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| 235 |
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| 236 | """)
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| 237 |
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| 238 |
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| 239 | keys = apiutil.GetDispatchedFunctions(sys.argv[1]+"/APIspec.txt")
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| 240 |
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| 241 | for func_name in keys:
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| 242 | if apiutil.FindSpecial( "packer", func_name ):
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| 243 | continue
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| 244 |
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| 245 | if not apiutil.HasPackOpcode(func_name):
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| 246 | continue
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| 247 |
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| 248 | pointers_ok = 0
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| 249 |
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| 250 | return_type = apiutil.ReturnType(func_name)
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| 251 | params = apiutil.Parameters(func_name)
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| 252 |
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| 253 | if return_type != 'void':
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| 254 | # Yet another gross hack for glGetString
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| 255 | if return_type.find('*') == -1:
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| 256 | return_type = return_type + " *"
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| 257 | params.append(("return_value", return_type, 0))
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| 258 |
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| 259 | if "get" in apiutil.Properties(func_name):
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| 260 | pointers_ok = 1
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| 261 | params.append(("writeback", "int *", 0))
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| 262 |
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| 263 | if func_name == 'Writeback':
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| 264 | pointers_ok = 1
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| 265 |
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| 266 | if not func_name in r0_funcs:
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| 267 | print('#ifndef IN_RING0')
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| 268 |
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| 269 | PrintFunc( func_name, params, 0, pointers_ok )
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| 270 | PrintFunc( func_name, params, 1, pointers_ok )
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| 271 |
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| 272 | if not func_name in r0_funcs:
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| 273 | print('#endif')
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| 274 |
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