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1 | <?xml version="1.0" encoding="UTF-8"?> |
2 | <!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook MathML Module V1.1b1//EN" | |
3 | "http://www.oasis-open.org/docbook/xml/mathml/1.1CR1/dbmathml.dtd"> | |
4 | <refentry id="glColorMask"> | |
5 | <refmeta> | |
6 | <refmetainfo> | |
7 | <copyright> | |
8 | <year>1991-2006</year> | |
9 | <holder>Silicon Graphics, Inc.</holder> | |
10 | </copyright> | |
11 | </refmetainfo> | |
12 | <refentrytitle>glColorMask</refentrytitle> | |
13 | <manvolnum>3G</manvolnum> | |
14 | </refmeta> | |
15 | <refnamediv> | |
16 | <refname>glColorMask, glColorMaski</refname> | |
17 | <refpurpose>enable and disable writing of frame buffer color components</refpurpose> | |
18 | </refnamediv> | |
19 | <refsynopsisdiv><title>C Specification</title> | |
20 | <funcsynopsis> | |
21 | <funcprototype> | |
22 | <funcdef>void <function>glColorMask</function></funcdef> | |
23 | <paramdef>GLboolean <parameter>red</parameter></paramdef> | |
24 | <paramdef>GLboolean <parameter>green</parameter></paramdef> | |
25 | <paramdef>GLboolean <parameter>blue</parameter></paramdef> | |
26 | <paramdef>GLboolean <parameter>alpha</parameter></paramdef> | |
27 | </funcprototype> | |
28 | </funcsynopsis> | |
29 | <funcsynopsis> | |
30 | <funcprototype> | |
31 | <funcdef>void <function>glColorMaski</function></funcdef> | |
32 | <paramdef>GLuint <parameter>buf</parameter></paramdef> | |
33 | <paramdef>GLboolean <parameter>red</parameter></paramdef> | |
34 | <paramdef>GLboolean <parameter>green</parameter></paramdef> | |
35 | <paramdef>GLboolean <parameter>blue</parameter></paramdef> | |
36 | <paramdef>GLboolean <parameter>alpha</parameter></paramdef> | |
37 | </funcprototype> | |
38 | </funcsynopsis> | |
39 | </refsynopsisdiv> | |
40 | <refsect1 id="parameters"><title>Parameters</title> | |
41 | <variablelist> | |
42 | <varlistentry> | |
43 | <term><parameter>buf</parameter></term> | |
44 | <listitem> | |
45 | <para> | |
46 | For <function>glColorMaski</function>, specifies the index of the | |
47 | draw buffer whose color mask to set. | |
48 | </para> | |
49 | </listitem> | |
50 | </varlistentry> | |
51 | <varlistentry> | |
52 | <term><parameter>red</parameter></term> | |
53 | <term><parameter>green</parameter></term> | |
54 | <term><parameter>blue</parameter></term> | |
55 | <term><parameter>alpha</parameter></term> | |
56 | <listitem> | |
57 | <para> | |
58 | Specify whether red, green, blue, and alpha are to be written | |
59 | into the frame buffer. | |
60 | The initial values are all <constant>GL_TRUE</constant>, | |
61 | indicating that the color components are written. | |
62 | </para> | |
63 | </listitem> | |
64 | </varlistentry> | |
65 | </variablelist> | |
66 | </refsect1> | |
67 | <refsect1 id="description"><title>Description</title> | |
68 | <para> | |
69 | <function>glColorMask</function> and <function>glColorMaski</function> specify whether the individual color components in the frame buffer | |
70 | can or cannot be written. <function>glColorMaski</function> sets the mask for a specific draw buffer, whereas | |
71 | <function>glColorMask</function> sets the mask for all draw buffers. | |
72 | If <parameter>red</parameter> is <constant>GL_FALSE</constant>, | |
73 | for example, | |
74 | no change is made to the red component of any pixel in any of the | |
75 | color buffers, | |
76 | regardless of the drawing operation attempted. | |
77 | </para> | |
78 | <para> | |
79 | Changes to individual bits of components cannot be controlled. | |
80 | Rather, | |
81 | changes are either enabled or disabled for entire color components. | |
82 | </para> | |
83 | </refsect1> | |
84 | <refsect1 id="associatedgets"><title>Associated Gets</title> | |
85 | <para> | |
86 | <citerefentry><refentrytitle>glGet</refentrytitle></citerefentry> with argument <constant>GL_COLOR_WRITEMASK</constant> | |
87 | </para> | |
88 | </refsect1> | |
89 | <refsect1 id="seealso"><title>See Also</title> | |
90 | <para> | |
91 | <citerefentry><refentrytitle>glClear</refentrytitle></citerefentry>, | |
92 | <citerefentry><refentrytitle>glDepthMask</refentrytitle></citerefentry>, | |
93 | <citerefentry><refentrytitle>glStencilMask</refentrytitle></citerefentry> | |
94 | </para> | |
95 | </refsect1> | |
96 | <refsect1 id="Copyright"><title>Copyright</title> | |
97 | <para> | |
98 | Copyright <trademark class="copyright"></trademark> 1991-2006 | |
99 | Silicon Graphics, Inc. | |
100 | Copyright <trademark class="copyright"></trademark> 2010-2011 Khronos Group. | |
101 | This document is licensed under the SGI | |
102 | Free Software B License. For details, see | |
103 | <ulink url="http://oss.sgi.com/projects/FreeB/">http://oss.sgi.com/projects/FreeB/</ulink>. | |
104 | </para> | |
105 | </refsect1> | |
106 | </refentry> |