glCallLists(3g)

1GLCALLLISTS(3G)                                                GLCALLLISTS(3G)
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NAME

6       glCallLists - execute a list of display lists
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C SPECIFICATION

10       void glCallLists( GLsizei n,
11                         GLenum type,
12                         const GLvoid *lists )
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PARAMETERS

16       n      Specifies the number of display lists to be executed.
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18       type   Specifies  the  type  of  values  in  lists.  Symbolic constants
19              GL_BYTE, GL_UNSIGNED_BYTE, GL_SHORT, GL_UNSIGNED_SHORT,  GL_INT,
20              GL_UNSIGNED_INT,    GL_FLOAT,    GL_2_BYTES,   GL_3_BYTES,   and
21              GL_4_BYTES are accepted.
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23       lists  Specifies the address of an array of name offsets in the display
24              list.   The  pointer  type  is  void  because the offsets can be
25              bytes, shorts, ints, or floats, depending on the value of type.
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DESCRIPTION

28       glCallLists causes each display list in the list  of  names  passed  as
29       lists  to be executed.  As a result, the commands saved in each display
30       list are executed in order, just as if they were called without using a
31       display  list.   Names  of display lists that have not been defined are
32       ignored.
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34       glCallLists provides an efficient means for  executing  more  than  one
35       display  list.   type  allows  lists  with  various  name formats to be
36       accepted.  The formats are as follows:
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38       GL_BYTE                  lists is treated as an array of signed  bytes,
39                                each in the range -128 through 127.
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41       GL_UNSIGNED_BYTE         lists  is  treated  as  an  array  of unsigned
42                                bytes, each in the range 0 through 255.
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44       GL_SHORT                 lists is treated as an array  of  signed  two-
45                                byte   integers,  each  in  the  range  -32768
46                                through 32767.
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48       GL_UNSIGNED_SHORT        lists is treated as an array of unsigned  two-
49                                byte  integers,  each  in  the range 0 through
50                                65535.
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52       GL_INT                   lists is treated as an array of  signed  four-
53                                byte integers.
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55       GL_UNSIGNED_INT          lists is treated as an array of unsigned four-
56                                byte integers.
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58       GL_FLOAT                 lists is treated  as  an  array  of  four-byte
59                                floating-point values.
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61       GL_2_BYTES               lists  is  treated  as  an  array  of unsigned
62                                bytes.  Each pair of bytes specifies a  single
63                                display-list  name.   The value of the pair is
64                                computed as 256 times the  unsigned  value  of
65                                the  first byte plus the unsigned value of the
66                                second byte.
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68       GL_3_BYTES               lists is  treated  as  an  array  of  unsigned
69                                bytes.  Each triplet of bytes specifies a sin‐
70                                gle  display-list  name.   The  value  of  the
71                                triplet   is   computed  as  65536  times  the
72                                unsigned value of the  first  byte,  plus  256
73                                times  the  unsigned value of the second byte,
74                                plus the unsigned value of the third byte.
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76       GL_4_BYTES               lists is  treated  as  an  array  of  unsigned
77                                bytes.   Each  quadruplet of bytes specifies a
78                                single display-list name.  The  value  of  the
79                                quadruplet  is  computed as 16777216 times the
80                                unsigned value of the first byte,  plus  65536
81                                times  the  unsigned value of the second byte,
82                                plus 256 times the unsigned value of the third
83                                byte,  plus  the  unsigned value of the fourth
84                                byte.
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86       The list of display-list names is not null-terminated.  Rather, n spec‐
87       ifies how many names are to be taken from lists.
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89       An   additional  level  of  indirection  is  made  available  with  the
90       glListBase command, which specifies an unsigned offset that is added to
91       each  display-list  name specified in lists before that display list is
92       executed.
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94       glCallLists can appear inside a display list.  To avoid the possibility
95       of infinite recursion resulting from display lists calling one another,
96       a limit is placed on the nesting level of display lists during display-
97       list  execution.  This limit must be at least 64, and it depends on the
98       implementation.
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100       GL state is not saved and restored across a call to glCallLists.  Thus,
101       changes  made  to  GL  state  during the execution of the display lists
102       remain after execution is completed.   Use  glPushAttrib,  glPopAttrib,
103       glPushMatrix,  and  glPopMatrix to preserve GL state across glCallLists
104       calls.
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NOTES

107       Display lists can be executed between a call to glBegin and the  corre‐
108       sponding  call to glEnd, as long as the display list includes only com‐
109       mands that are allowed in this interval.
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ERRORS

112       GL_INVALID_VALUE is generated if n is negative.
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114       GL_INVALID_ENUM  is  generated  if  type  is  not   one   of   GL_BYTE,
115       GL_UNSIGNED_BYTE, GL_SHORT, GL_UNSIGNED_SHORT, GL_INT, GL_UNSIGNED_INT,
116       GL_FLOAT, GL_2_BYTES, GL_3_BYTES, GL_4_BYTES.
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ASSOCIATED GETS

119       glGet with argument GL_LIST_BASE
120       glGet with argument GL_MAX_LIST_NESTING
121       glIsList
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