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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_bbox.c file from gl_header.parsed
from __future__ import print_function
import sys
import string
import apiutil
apiutil.CopyrightC()
print("""
/* DO NOT EDIT - THIS FILE GENERATED BY THE packer_bbox.py SCRIPT */
/* These functions pack glVertex functions and also update the bounding box
* if the cr_packer_globals.updateBBOX variable is non-zero.
*/
#include "packer.h"
#include "cr_opcodes.h"
#include "pack_bbox.h"
#include <float.h>
/**
* Reset packer bounding box to empty state.
*/
void crPackResetBoundingBox(CRPackContext *pc)
{
pc->bounds_min.x = FLT_MAX;
pc->bounds_min.y = FLT_MAX;
pc->bounds_min.z = FLT_MAX;
pc->bounds_max.x = -FLT_MAX;
pc->bounds_max.y = -FLT_MAX;
pc->bounds_max.z = -FLT_MAX;
pc->updateBBOX = 1;
}
/**
* Query current bounding box.
* \return GL_TRUE if non-empty box, GL_FALSE if empty box.
*/
GLboolean crPackGetBoundingBox(CRPackContext *pc,
GLfloat *xmin, GLfloat *ymin, GLfloat *zmin,
GLfloat *xmax, GLfloat *ymax, GLfloat *zmax)
{
if (pc->bounds_min.x != FLT_MAX) {
*xmin = pc->bounds_min.x;
*ymin = pc->bounds_min.y;
*zmin = pc->bounds_min.z;
*xmax = pc->bounds_max.x;
*ymax = pc->bounds_max.y;
*zmax = pc->bounds_max.z;
return GL_TRUE;
}
else {
return GL_FALSE;
}
}
""")
def WriteData( offset, arg_type, arg_name, is_swapped ):
if arg_type.find('*') != -1:
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)
return retval
def PrintFunction( func_name, extSuffix, num_coords, argtype,
do_swapped, do_count, do_vector ):
"""
Generate all the functions named crPackVertex[234][dfis][v]BBOX() and
crPackVertex[234][dfis][v]BBOX_COUNT().
We also handle glVertexAttrib*ARB.
Note: func_name should not have an ARB suffix.
"""
if do_count:
countSuffix = "_COUNT"
else:
countSuffix = ""
if do_swapped:
swapSuffix = "SWAP"
else:
swapSuffix = ""
if func_name[0:12] == "VertexAttrib":
isVertexAttrib = 1
else:
isVertexAttrib = 0
if argtype[0] == "N":
normalized = 1
else:
normalized = 0;
if argtype == "b" or argtype == "Nb":
vector_type = "GLbyte"
elif argtype == "ub" or argtype == "Nub":
vector_type = "GLubyte"
elif argtype == "s" or argtype == "Ns":
vector_type = "GLshort"
elif argtype == "us" or argtype == "Nus":
vector_type = "GLushort"
elif argtype == "i" or argtype == "Ni":
vector_type = "GLint"
elif argtype == "ui" or argtype == "Nui":
vector_type = "GLuint"
elif argtype == "f":
vector_type = "GLfloat"
elif argtype == "d":
vector_type = "GLdouble"
else:
print("type is %s" % argtype)
abort()
if do_vector:
if isVertexAttrib:
func_name = 'VertexAttrib%d%sv' % (num_coords, argtype)
else:
func_name = 'Vertex%d%sv' % (num_coords,argtype)
params = apiutil.Parameters(func_name + extSuffix)
print('void PACK_APIENTRY crPack%sBBOX%s%s(%s)' % (func_name + extSuffix, countSuffix,
swapSuffix, apiutil.MakeDeclarationString(params)))
print('{')
if do_vector:
# vector version
packet_length = num_coords * apiutil.sizeof(vector_type)
if isVertexAttrib:
packet_length += 4 # for index
if packet_length % 4 != 0:
packet_length += 2
else:
# non-vector
packet_length = apiutil.PacketLength( params )
if isVertexAttrib:
packet_length += 0 # for index
if packet_length % 4 != 0:
packet_length += 2
print("\tCR_GET_PACKER_CONTEXT(pc);")
print("\tunsigned char *data_ptr = NULL;")
if normalized:
if argtype == "Nb":
t = "B"
elif argtype == "Ni":
t = "I"
elif argtype == "Nui":
t = "UI"
elif argtype == "Nub":
t = "UB"
elif argtype == "Ns":
t = "S"
elif argtype == "Nus":
t = "US"
else:
abort()
if do_vector:
print("\tCREATE_%dD_VFLOATS_%s_NORMALIZED();" % (num_coords, t))
else:
print("\tCREATE_%dD_FLOATS_%s_NORMALIZED();" % (num_coords, t))
else:
if do_vector:
print("\tCREATE_%dD_VFLOATS();" % num_coords)
else:
print("\tCREATE_%dD_FLOATS();" % num_coords)
print("\tCR_GET_BUFFERED%s_POINTER(pc, %d);" % (countSuffix, packet_length))
# Bounding box code
if isVertexAttrib:
print("\tif (pc->updateBBOX && index == 0)")
else:
print("\tif (pc->updateBBOX)")
print("\t{")
if num_coords < 4:
print("\t\tUPDATE_%dD_BBOX();" % num_coords)
else:
print("\t\tUPDATE_3D_BBOX();")
print("\t}")
if isVertexAttrib:
print("\tif (index > 0) {")
t = argtype
print("\t\tpc->current.c.vertexAttrib.%s%d[index] = data_ptr + 4;" % (t, num_coords))
print("\t\tpc->current.attribsUsedMask |= (1 << index);")
if do_count:
print("\t\tpc->current.vtx_count--;")
print("\t}")
fname = func_name + extSuffix
if do_vector:
# use non-vector opcode
opcode = apiutil.OpcodeName( func_name[:-1] + extSuffix )
else:
opcode = apiutil.OpcodeName( func_name + extSuffix )
counter = 0
if do_vector:
if isVertexAttrib:
if do_swapped:
print("\tWRITE_DATA(0, GLuint, SWAP32(index));")
else:
print("\tWRITE_DATA(0, GLuint, index);")
counter += 4
argname = params[1][0] # skip 'index' parameter
else:
argname = params[0][0]
for index in range(num_coords):
print(WriteData( counter, vector_type, "%s[%d]" % (argname, index), do_swapped ))
counter += apiutil.sizeof(vector_type)
if isVertexAttrib:
if do_vector == 2:
# this is a bit of a hack
print("\tWRITE_OPCODE(pc, %s);" % apiutil.OpcodeName( func_name + "ARB" ))
else:
print("\tWRITE_OPCODE(pc, %s);" % apiutil.OpcodeName( func_name[:-1] + "ARB" ))
else:
print("\tWRITE_OPCODE(pc, %s);" % apiutil.OpcodeName( func_name[:-1] ))
else:
for index in range(0,len(params)):
(name, type, vecSize) = params[index]
print(WriteData( counter, type, name, do_swapped ))
counter += apiutil.sizeof(type)
if isVertexAttrib:
print("\tWRITE_OPCODE(pc, %s);" % apiutil.OpcodeName( func_name + "ARB" ))
else:
print("\tWRITE_OPCODE(pc, %s);" % apiutil.OpcodeName( func_name ))
print("\tCR_UNLOCK_PACKER_CONTEXT(pc);")
print('}\n')
#end PrintFunction()
for num_coords in [2,3,4]:
for argtype in ['d', 'f', 'i', 's']:
func_name = 'Vertex%d%s' % (num_coords, argtype)
for swap in range(0, 2):
for count in range(0, 2):
for vec in range(0, 2):
PrintFunction( func_name, "", num_coords, argtype, swap,
count, vec )
for num_coords in [1,2,3,4]:
for argtype in ['d', 'f', 's']:
func_name = 'VertexAttrib%d%s' % (num_coords, argtype)
for swap in range(0, 2):
for count in range(0, 2):
for vec in range(0, 2):
PrintFunction( func_name, "ARB", num_coords, argtype, swap,
count, vec )
# Special vector functions
moreFuncs = [ [ "VertexAttrib4ubv", "ub" ],
[ "VertexAttrib4usv", "us" ],
[ "VertexAttrib4uiv", "ui" ],
[ "VertexAttrib4bv", "b" ],
[ "VertexAttrib4iv", "i" ],
[ "VertexAttrib4Nbv", "Nb" ],
[ "VertexAttrib4Nsv", "Ns" ],
[ "VertexAttrib4Niv", "Ni" ],
[ "VertexAttrib4Nubv", "Nub" ],
[ "VertexAttrib4Nusv", "Nus" ],
[ "VertexAttrib4Nuiv", "Nui" ]
]
for (func_name, argtype) in moreFuncs:
vec = 2 # special, hacked value
num_coords = 4
for swap in range(0, 2):
for count in range(0, 2):
PrintFunction( func_name, "ARB", num_coords, argtype, swap, count, vec )
# Special non-vector functions
moreFuncs = [ [ "VertexAttrib4Nub", "Nub" ] ]
for (func_name, argtype) in moreFuncs:
vec = 0
num_coords = 4
for swap in range(0, 2):
for count in range(0, 2):
PrintFunction( func_name, "ARB", num_coords, argtype, swap, count, vec )
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