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# Copyright (c) 2001, Stanford University
# All rights reserved.
#
# See the file LICENSE.txt for information on redistributing this software.
# This script generates the packer.c file from the gl_header.parsed file.
from __future__ import print_function
import sys, string, re
import apiutil
def WriteData( offset, arg_type, arg_name, is_swapped ):
"""Return a string to write a variable to the packing buffer."""
retval = 9
if apiutil.IsPointer(arg_type):
retval = "\tWRITE_NETWORK_POINTER(%d, (void *) %s);" % (offset, arg_name )
else:
if is_swapped:
if arg_type == "GLfloat" or arg_type == "GLclampf":
retval = "\tWRITE_DATA(%d, GLuint, SWAPFLOAT(%s));" % (offset, arg_name)
elif arg_type == "GLdouble" or arg_type == "GLclampd":
retval = "\tWRITE_SWAPPED_DOUBLE(%d, %s);" % (offset, arg_name)
elif apiutil.sizeof(arg_type) == 1:
retval = "\tWRITE_DATA(%d, %s, %s);" % (offset, arg_type, arg_name)
elif apiutil.sizeof(arg_type) == 2:
retval = "\tWRITE_DATA(%d, %s, SWAP16(%s));" % (offset, arg_type, arg_name)
elif apiutil.sizeof(arg_type) == 4:
retval = "\tWRITE_DATA(%d, %s, SWAP32(%s));" % (offset, arg_type, arg_name)
else:
if arg_type == "GLdouble" or arg_type == "GLclampd":
retval = "\tWRITE_DOUBLE(%d, %s);" % (offset, arg_name)
else:
retval = "\tWRITE_DATA(%d, %s, %s);" % (offset, arg_type, arg_name)
if retval == 9:
print >>sys.stderr, "no retval for %s %s" % (arg_name, arg_type)
assert 0
return retval
def UpdateCurrentPointer( func_name ):
m = re.search( r"^(Color|Normal)([1234])(ub|b|us|s|ui|i|f|d)$", func_name )
if m :
k = m.group(1)
name = '%s%s' % (k[:1].lower(),k[1:])
type = m.group(3) + m.group(2)
print("\tpc->current.c.%s.%s = data_ptr;" % (name,type))
return
m = re.search( r"^(SecondaryColor)(3)(ub|b|us|s|ui|i|f|d)EXT$", func_name )
if m :
k = m.group(1)
name = 'secondaryColor'
type = m.group(3) + m.group(2)
print("\tpc->current.c.%s.%s = data_ptr;" % (name,type))
return
m = re.search( r"^(TexCoord)([1234])(ub|b|us|s|ui|i|f|d)$", func_name )
if m :
k = m.group(1)
name = 'texCoord'
type = m.group(3) + m.group(2)
print("\tpc->current.c.%s.%s[0] = data_ptr;" % (name,type))
return
m = re.search( r"^(MultiTexCoord)([1234])(ub|b|us|s|ui|i|f|d)ARB$", func_name )
if m :
k = m.group(1)
name = 'texCoord'
type = m.group(3) + m.group(2)
print("\tpc->current.c.%s.%s[texture-GL_TEXTURE0_ARB] = data_ptr + 4;" % (name,type))
return
m = re.match( r"^(Index)(ub|b|us|s|ui|i|f|d)$", func_name )
if m :
k = m.group(1)
name = 'index'
type = m.group(2) + "1"
print("\tpc->current.c.%s.%s = data_ptr;" % (name,type))
return
m = re.match( r"^(EdgeFlag)$", func_name )
if m :
k = m.group(1)
name = 'edgeFlag'
type = "l1"
print("\tpc->current.c.%s.%s = data_ptr;" % (name,type))
return
m = re.match( r"^(FogCoord)(f|d)EXT$", func_name )
if m :
k = m.group(1)
name = 'fogCoord'
type = m.group(2) + "1"
print("\tpc->current.c.%s.%s = data_ptr;" % (name,type))
return
m = re.search( r"^(VertexAttrib)([1234])N?(ub|b|s|f|d)(NV|ARB)$", func_name )
if m :
k = m.group(1)
name = 'vertexAttrib'
type = m.group(3) + m.group(2)
# Add 12 to skip the packet length, opcode and index fields
print("\tpc->current.c.%s.%s[index] = data_ptr + 4;" % (name,type))
if m.group(4) == "ARB" or m.group(4) == "NV":
print("\tpc->current.attribsUsedMask |= (1 << index);")
print("\tpc->current.changedVertexAttrib |= (1 << index);")
return
def PrintFunc( func_name, params, is_swapped, can_have_pointers ):
"""Emit a packer function."""
if is_swapped:
print('void PACK_APIENTRY crPack%sSWAP(%s)' % (func_name, apiutil.MakeDeclarationStringWithContext('CR_PACKER_CONTEXT', params)))
else:
print('void PACK_APIENTRY crPack%s(%s)' % (func_name, apiutil.MakeDeclarationStringWithContext('CR_PACKER_CONTEXT', params)))
print('{')
print('\tCR_GET_PACKER_CONTEXT(pc);')
# Save original function name
orig_func_name = func_name
# Convert to a non-vector version of the function if possible
func_name = apiutil.NonVectorFunction( func_name )
if not func_name:
func_name = orig_func_name
# Check if there are any pointer parameters.
# That's usually a problem so we'll emit an error function.
nonVecParams = apiutil.Parameters(func_name)
bail_out = 0
for (name, type, vecSize) in nonVecParams:
if apiutil.IsPointer(type) and vecSize == 0 and not can_have_pointers:
bail_out = 1
if bail_out:
for (name, type, vecSize) in nonVecParams:
print('\t(void)%s;' % (name))
print('\tcrError ( "%s needs to be special cased %d %d!");' % (func_name, vecSize, can_have_pointers))
print('\t(void) pc;')
print('}')
# XXX we should really abort here
return
if "extpack" in apiutil.ChromiumProps(func_name):
is_extended = 1
else:
is_extended = 0
print("\tunsigned char *data_ptr = NULL;")
print('\t(void) pc;')
#if func_name == "Enable" or func_name == "Disable":
# print "\tCRASSERT(!pc->buffer.geometry_only); /* sanity check */"
for index in range(0,len(params)):
(name, type, vecSize) = params[index]
if vecSize>0 and func_name!=orig_func_name:
print(" if (!%s) {" % name)
# Know the reason for this one, so avoid the spam.
if orig_func_name != "SecondaryColor3fvEXT":
print(" crDebug(\"App passed NULL as %s for %s\");" % (name, orig_func_name))
print(" return;")
print(" }")
packet_length = apiutil.PacketLength(nonVecParams)
if packet_length == 0 and not is_extended:
print("\tCR_GET_BUFFERED_POINTER_NO_ARGS(pc);")
elif func_name[:9] == "Translate" or func_name[:5] == "Color":
# XXX WTF is the purpose of this?
if is_extended:
packet_length += 8
print("\tCR_GET_BUFFERED_POINTER_NO_BEGINEND_FLUSH(pc, %d, GL_TRUE);" % packet_length)
else:
if is_extended:
packet_length += 8
print("\tCR_GET_BUFFERED_POINTER(pc, %d);" % packet_length)
UpdateCurrentPointer( func_name )
if is_extended:
counter = 8
print(WriteData( 0, 'GLint', packet_length, is_swapped ))
print(WriteData( 4, 'GLenum', apiutil.ExtendedOpcodeName( func_name ), is_swapped ))
else:
counter = 0
# Now emit the WRITE_() macros for all parameters
for index in range(0,len(params)):
(name, type, vecSize) = params[index]
# if we're converting a vector-valued function to a non-vector func:
if vecSize > 0 and func_name != orig_func_name:
ptrType = apiutil.PointerType(type)
for i in range(0, vecSize):
print(WriteData( counter + i * apiutil.sizeof(ptrType),
ptrType, "%s[%d]" % (name, i), is_swapped ))
# XXX increment counter here?
else:
print(WriteData( counter, type, name, is_swapped ))
if apiutil.IsPointer(type):
counter += apiutil.PointerSize()
else:
counter += apiutil.sizeof(type)
# finish up
if is_extended:
print("\tWRITE_OPCODE(pc, CR_EXTEND_OPCODE);")
else:
print("\tWRITE_OPCODE(pc, %s);" % apiutil.OpcodeName( func_name ))
if "get" in apiutil.Properties(func_name):
print('\tCR_CMDBLOCK_CHECK_FLUSH(pc);')
print('\tCR_UNLOCK_PACKER_CONTEXT(pc);')
print('}\n')
r0_funcs = [ 'ChromiumParameteriCR', 'WindowSize', 'WindowShow', 'WindowPosition' ]
apiutil.CopyrightC()
print("""
/* DO NOT EDIT - THIS FILE GENERATED BY THE packer.py SCRIPT */
/* For each of the OpenGL functions we have a packer function which
* packs the function's opcode and arguments into a buffer.
*/
#include "packer.h"
#include "cr_opcodes.h"
""")
keys = apiutil.GetDispatchedFunctions(sys.argv[1]+"/APIspec.txt")
for func_name in keys:
if apiutil.FindSpecial( "packer", func_name ):
continue
if not apiutil.HasPackOpcode(func_name):
continue
pointers_ok = 0
return_type = apiutil.ReturnType(func_name)
params = apiutil.Parameters(func_name)
if return_type != 'void':
# Yet another gross hack for glGetString
if return_type.find('*') == -1:
return_type = return_type + " *"
params.append(("return_value", return_type, 0))
if "get" in apiutil.Properties(func_name):
pointers_ok = 1
params.append(("writeback", "int *", 0))
if func_name == 'Writeback':
pointers_ok = 1
if not func_name in r0_funcs:
print('#ifndef IN_RING0')
PrintFunc( func_name, params, 0, pointers_ok )
PrintFunc( func_name, params, 1, pointers_ok )
if not func_name in r0_funcs:
print('#endif')
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