1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
|
'\" te
'\"! tbl|eqn | mmdoc
'\"macro stdmacro
.ds Vn Version 1.2
.ds Dt 24 September 1999
.ds Re Release 1.2.1
.ds Dp Jan 14 18:30
.ds Dm 01 getpixelm
.ds Xs 23505 6 getpixelmap.gl
.TH GLGETPIXELMAP 3G
.SH NAME
.B "glGetPixelMapfv, glGetPixelMapuiv, glGetPixelMapusv
\- return the specified pixel map
.SH C SPECIFICATION
void \f3glGetPixelMapfv\fP(
GLenum \fImap\fP,
.nf
.ta \w'\f3void \fPglGetPixelMapfv( 'u
GLfloat \fI*values\fP )
.fi
void \f3glGetPixelMapuiv\fP(
GLenum \fImap\fP,
.nf
.ta \w'\f3void \fPglGetPixelMapuiv( 'u
GLuint \fI*values\fP )
.fi
void \f3glGetPixelMapusv\fP(
GLenum \fImap\fP,
.nf
.ta \w'\f3void \fPglGetPixelMapusv( 'u
GLushort \fI*values\fP )
.fi
.SH PARAMETERS
.TP \w'\fIvalues\fP\ \ 'u
\f2map\fP
Specifies the name of the pixel map to return.
Accepted values are
\%\f3GL_PIXEL_MAP_I_TO_I\fP,
\%\f3GL_PIXEL_MAP_S_TO_S\fP,
\%\f3GL_PIXEL_MAP_I_TO_R\fP,
\%\f3GL_PIXEL_MAP_I_TO_G\fP,
\%\f3GL_PIXEL_MAP_I_TO_B\fP,
\%\f3GL_PIXEL_MAP_I_TO_A\fP,
\%\f3GL_PIXEL_MAP_R_TO_R\fP,
\%\f3GL_PIXEL_MAP_G_TO_G\fP,
\%\f3GL_PIXEL_MAP_B_TO_B\fP, and
\%\f3GL_PIXEL_MAP_A_TO_A\fP.
.TP
\f2values\fP
Returns the pixel map contents.
.SH DESCRIPTION
See the \%\f3glPixelMap\fP reference page for a description of the acceptable
values for the \f2map\fP parameter.
\%\f3glGetPixelMap\fP returns in \f2values\fP the contents of the pixel map
specified in \f2map\fP.
Pixel maps are used during the execution of
\%\f3glReadPixels\fP,
\%\f3glDrawPixels\fP,
\%\f3glCopyPixels\fP,
\%\f3glTexImage1D\fP,
\%\f3glTexImage2D\fP,
\%\f3glTexImage3D\fP,
\%\f3glTexSubImage1D\fP,
\%\f3glTexSubImage2D\fP,
\%\f3glTexSubImage3D\fP,
\%\f3glCopyTexImage1D\fP,
\%\f3glCopyTexImage2D\fP,
\%\f3glCopyTexSubImage1D\fP,
\%\f3glCopyTexSubImage2D\fP,
\%\f3glCopyTexSubImage3D\fP,
\%\f3glColorTable\fP,
\%\f3glColorSubTable\fP,
\%\f3glCopyColorTable\fP,
\%\f3glCopyColorSubTable\fP,
\%\f3glConvolutionFilter1D\fP,
\%\f3glConvolutionFilter2D\fP,
\%\f3glSeparableFilter2D\fP,
\%\f3glGetHistogram\fP,
\%\f3glGetMinmax\fP, and
\%\f3glGetTexImage\fP
to map color indices,
stencil indices,
color components,
and depth components to other values.
.P
Unsigned integer values,
if requested,
are linearly mapped from the internal fixed or floating-point representation
such that 1.0 maps to the largest representable integer value,
and 0.0 maps to 0.
Return unsigned integer values are undefined if the map value was
not in the range [0,1].
.P
To determine the required size of \f2map\fP,
call \%\f3glGet\fP with the appropriate symbolic constant.
.SH NOTES
If an error is generated,
no change is made to the contents of \f2values\fP.
.SH ERRORS
\%\f3GL_INVALID_ENUM\fP is generated if \f2map\fP is not an accepted value.
.P
\%\f3GL_INVALID_OPERATION\fP is generated if \%\f3glGetPixelMap\fP
is executed between the execution of \%\f3glBegin\fP
and the corresponding execution of \%\f3glEnd\fP.
.SH ASSOCIATED GETS
.na
\%\f3glGet\fP with argument \%\f3GL_PIXEL_MAP_I_TO_I_SIZE\fP
.br
\%\f3glGet\fP with argument \%\f3GL_PIXEL_MAP_S_TO_S_SIZE\fP
.br
\%\f3glGet\fP with argument \%\f3GL_PIXEL_MAP_I_TO_R_SIZE\fP
.br
\%\f3glGet\fP with argument \%\f3GL_PIXEL_MAP_I_TO_G_SIZE\fP
.br
\%\f3glGet\fP with argument \%\f3GL_PIXEL_MAP_I_TO_B_SIZE\fP
.br
\%\f3glGet\fP with argument \%\f3GL_PIXEL_MAP_I_TO_A_SIZE\fP
.br
\%\f3glGet\fP with argument \%\f3GL_PIXEL_MAP_R_TO_R_SIZE\fP
.br
\%\f3glGet\fP with argument \%\f3GL_PIXEL_MAP_G_TO_G_SIZE\fP
.br
\%\f3glGet\fP with argument \%\f3GL_PIXEL_MAP_B_TO_B_SIZE\fP
.br
\%\f3glGet\fP with argument \%\f3GL_PIXEL_MAP_A_TO_A_SIZE\fP
.br
\%\f3glGet\fP with argument \%\f3GL_MAX_PIXEL_MAP_TABLE\fP
.SH SEE ALSO
\%\f3glColorSubTable(3G)\fP,
\%\f3glColorTable(3G)\fP,
\%\f3glConvolutionFilter1D(3G)\fP,
\%\f3glConvolutionFilter2D(3G)\fP,
\%\f3glCopyColorSubTable(3G)\fP,
\%\f3glCopyColorTable(3G)\fP,
\%\f3glCopyPixels(3G)\fP,
\%\f3glCopyTexImage1D(3G)\fP,
\%\f3glCopyTexImage2D(3G)\fP,
\%\f3glCopyTexSubImage1D(3G)\fP,
\%\f3glCopyTexSubImage2D(3G)\fP,
\%\f3glCopyTexSubImage3D(3G)\fP,
\%\f3glDrawPixels(3G)\fP,
\%\f3glGetHistogram(3G)\fP,
\%\f3glGetMinmax(3G)\fP,
\%\f3glGetTexImage(3G)\fP,
\%\f3glPixelMap(3G)\fP,
\%\f3glPixelTransfer(3G)\fP,
\%\f3glReadPixels(3G)\fP,
\%\f3glSeparableFilter2D(3G)\fP,
\%\f3glTexImage1D(3G)\fP,
\%\f3glTexImage2D(3G)\fP
\%\f3glTexImage3D(3G)\fP,
\%\f3glTexSubImage1D(3G)\fP,
\%\f3glTexSubImage2D(3G)\fP,
\%\f3glTexSubImage3D(3G)\fP
|
