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=
"glCopyTexImage1D">
9 <holder>Silicon Graphics, Inc.
</holder>
12 <refentrytitle>glCopyTexImage1D
</refentrytitle>
13 <manvolnum>3G
</manvolnum>
16 <refname>glCopyTexImage1D
</refname>
17 <refpurpose>copy pixels into a
1D texture image
</refpurpose>
19 <refsynopsisdiv><title>C Specification
</title>
22 <funcdef>void
<function>glCopyTexImage1D
</function></funcdef>
23 <paramdef>GLenum
<parameter>target
</parameter></paramdef>
24 <paramdef>GLint
<parameter>level
</parameter></paramdef>
25 <paramdef>GLenum
<parameter>internalformat
</parameter></paramdef>
26 <paramdef>GLint
<parameter>x
</parameter></paramdef>
27 <paramdef>GLint
<parameter>y
</parameter></paramdef>
28 <paramdef>GLsizei
<parameter>width
</parameter></paramdef>
29 <paramdef>GLint
<parameter>border
</parameter></paramdef>
33 <!-- eqn: ignoring delim $$ -->
34 <refsect1 id=
"parameters"><title>Parameters
</title>
37 <term><parameter>target
</parameter></term>
40 Specifies the target texture.
41 Must be
<constant>GL_TEXTURE_1D
</constant>.
46 <term><parameter>level
</parameter></term>
49 Specifies the level-of-detail number.
50 Level
0 is the base image level.
51 Level
<emphasis>n
</emphasis> is the
<emphasis>n
</emphasis>th mipmap reduction image.
56 <term><parameter>internalformat
</parameter></term>
59 Specifies the internal format of the texture.
60 Must be one of the following symbolic constants:
61 <constant>GL_COMPRESSED_RED
</constant>,
62 <constant>GL_COMPRESSED_RG
</constant>,
63 <constant>GL_COMPRESSED_RGB
</constant>,
64 <constant>GL_COMPRESSED_RGBA
</constant>.
65 <constant>GL_COMPRESSED_SRGB
</constant>,
66 <constant>GL_COMPRESSED_SRGB_ALPHA
</constant>.
67 <constant>GL_DEPTH_COMPONENT
</constant>,
68 <constant>GL_DEPTH_COMPONENT16
</constant>,
69 <constant>GL_DEPTH_COMPONENT24
</constant>,
70 <constant>GL_DEPTH_COMPONENT32
</constant>,
71 <constant>GL_RED
</constant>,
72 <constant>GL_RG
</constant>,
73 <constant>GL_RGB
</constant>,
74 <constant>GL_R3_G3_B2
</constant>,
75 <constant>GL_RGB4
</constant>,
76 <constant>GL_RGB5
</constant>,
77 <constant>GL_RGB8
</constant>,
78 <constant>GL_RGB10
</constant>,
79 <constant>GL_RGB12
</constant>,
80 <constant>GL_RGB16
</constant>,
81 <constant>GL_RGBA
</constant>,
82 <constant>GL_RGBA2
</constant>,
83 <constant>GL_RGBA4
</constant>,
84 <constant>GL_RGB5_A1
</constant>,
85 <constant>GL_RGBA8
</constant>,
86 <constant>GL_RGB10_A2
</constant>,
87 <constant>GL_RGBA12
</constant>,
88 <constant>GL_RGBA16
</constant>,
89 <constant>GL_SRGB
</constant>,
90 <constant>GL_SRGB8
</constant>,
91 <constant>GL_SRGB_ALPHA
</constant>, or
92 <constant>GL_SRGB8_ALPHA8
</constant>.
97 <term><parameter>x
</parameter></term>
98 <term><parameter>y
</parameter></term>
101 Specify the window coordinates of the left corner
102 of the row of pixels to be copied.
107 <term><parameter>width
</parameter></term>
110 Specifies the width of the texture image.
111 The height of the texture image is
1.
116 <term><parameter>border
</parameter></term>
125 <refsect1 id=
"description"><title>Description
</title>
127 <function>glCopyTexImage1D
</function> defines a one-dimensional texture image with pixels from the current
128 <constant>GL_READ_BUFFER
</constant>.
131 The screen-aligned pixel row with left corner at
132 <inlineequation><mml:math>
133 <!-- eqn: (x, y): -->
134 <mml:mfenced open=
"(" close=
")">
135 <mml:mi mathvariant=
"italic">x
</mml:mi>
136 <mml:mi mathvariant=
"italic">y
</mml:mi>
138 </mml:math></inlineequation>
140 <inlineequation><mml:math>
141 <!-- eqn: width + 2 ( border ): -->
143 <mml:mi mathvariant=
"italic">width
</mml:mi>
145 </mml:math></inlineequation>
146 defines the texture array
147 at the mipmap level specified by
<parameter>level
</parameter>.
148 <parameter>internalformat
</parameter> specifies the internal format of the texture array.
151 The pixels in the row are processed exactly as if
152 <citerefentry><refentrytitle>glReadPixels
</refentrytitle></citerefentry> had been called, but the process stops just before
154 At this point all pixel component values are clamped to the range
155 <inlineequation><mml:math>
157 <mml:mfenced open=
"[" close=
"]">
161 </mml:math></inlineequation>
162 and then converted to the texture's internal format for storage in the texel
166 Pixel ordering is such that lower
167 <inlineequation><mml:math><mml:mi mathvariant=
"italic">x
</mml:mi></mml:math></inlineequation>
168 screen coordinates correspond to
169 lower texture coordinates.
172 If any of the pixels within the specified row of the current
173 <constant>GL_READ_BUFFER
</constant> are outside the window associated with the current
174 rendering context, then the values obtained for those pixels are undefined.
177 <function>glCopyTexImage1D
</function> defines a one-dimensional texture image with pixels from the current
178 <constant>GL_READ_BUFFER
</constant>.
181 When
<parameter>internalformat
</parameter> is one of the sRGB types, the GL does not automatically convert the source pixels to the sRGB color space. In this case, the
<function>glPixelMap
</function> function can be used to accomplish the conversion.
184 <refsect1 id=
"notes"><title>Notes
</title>
186 1,
2,
3, and
4 are not accepted values for
<parameter>internalformat
</parameter>.
189 An image with
0 width indicates a NULL texture.
192 <refsect1 id=
"errors"><title>Errors
</title>
194 <constant>GL_INVALID_ENUM
</constant> is generated if
<parameter>target
</parameter> is not one of the allowable values.
197 <constant>GL_INVALID_VALUE
</constant> is generated if
<parameter>level
</parameter> is less than
0.
200 <constant>GL_INVALID_VALUE
</constant> may be generated if
<parameter>level
</parameter> is greater
202 <inlineequation><mml:math>
203 <!-- eqn: log sub 2 max: -->
205 <mml:msub><mml:mi mathvariant=
"italic">log
</mml:mi>
208 <mml:mo>⁢</mml:mo>
209 <mml:mi mathvariant=
"italic">max
</mml:mi>
211 </mml:math></inlineequation>,
213 <inlineequation><mml:math><mml:mi mathvariant=
"italic">max
</mml:mi></mml:math></inlineequation>
214 is the returned value of
<constant>GL_MAX_TEXTURE_SIZE
</constant>.
217 <constant>GL_INVALID_VALUE
</constant> is generated if
<parameter>internalformat
</parameter> is not an allowable value.
220 <constant>GL_INVALID_VALUE
</constant> is generated if
<parameter>width
</parameter> is less than
0 or greater than
221 <constant>GL_MAX_TEXTURE_SIZE
</constant>.
224 <constant>GL_INVALID_VALUE
</constant> is generated if
<parameter>border
</parameter> is not
0.
227 <constant>GL_INVALID_OPERATION
</constant> is generated if
<parameter>internalformat
</parameter> is
228 <constant>GL_DEPTH_COMPONENT
</constant>,
<constant>GL_DEPTH_COMPONENT16
</constant>,
229 <constant>GL_DEPTH_COMPONENT24
</constant>, or
<constant>GL_DEPTH_COMPONENT32
</constant> and there is no depth
233 <refsect1 id=
"associatedgets"><title>Associated Gets
</title>
235 <citerefentry><refentrytitle>glGetTexImage
</refentrytitle></citerefentry>
238 <refsect1 id=
"seealso"><title>See Also
</title>
240 <citerefentry><refentrytitle>glCopyTexImage2D
</refentrytitle></citerefentry>,
241 <citerefentry><refentrytitle>glCopyTexSubImage1D
</refentrytitle></citerefentry>,
242 <citerefentry><refentrytitle>glCopyTexSubImage2D
</refentrytitle></citerefentry>,
243 <citerefentry><refentrytitle>glPixelStore
</refentrytitle></citerefentry>,
244 <citerefentry><refentrytitle>glTexImage1D
</refentrytitle></citerefentry>,
245 <citerefentry><refentrytitle>glTexImage2D
</refentrytitle></citerefentry>,
246 <citerefentry><refentrytitle>glTexSubImage1D
</refentrytitle></citerefentry>,
247 <citerefentry><refentrytitle>glTexSubImage2D
</refentrytitle></citerefentry>,
248 <citerefentry><refentrytitle>glTexParameter
</refentrytitle></citerefentry>
251 <refsect1 id=
"Copyright"><title>Copyright
</title>
253 Copyright
<trademark class=
"copyright"></trademark> 1991-
2006
254 Silicon Graphics, Inc. This document is licensed under the SGI
255 Free Software B License. For details, see
256 <ulink url=
"http://oss.sgi.com/projects/FreeB/">http://oss.sgi.com/projects/FreeB/
</ulink>.