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1 | <?xml version="1.0" encoding="UTF-8"?> |
2 | <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "xhtml1-transitional.dtd"> | |
3 | <!-- saved from url=(0013)about:internet --> | |
c7b31271 | 4 | <?xml-stylesheet type="text/xsl" href="mathml.xsl"?><html xmlns="http://www.w3.org/1999/xhtml" xmlns:pref="http://www.w3.org/2002/Math/preference" pref:renderer="mathplayer-dl"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><link rel="stylesheet" type="text/css" href="opengl-man.css" /><title>glCopyTexSubImage1D - OpenGL 3.3 Reference Pages</title><meta name="generator" content="DocBook XSL Stylesheets V1.69.1" /></head><body><div class="refentry" lang="en" xml:lang="en"><a id="glCopyTexSubImage1D"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>glCopyTexSubImage1D — copy a one-dimensional texture subimage</p></div><div class="refsynopsisdiv"><h2>C Specification</h2><div class="funcsynopsis"><table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0"><tr><td><code class="funcdef">void <b class="fsfunc">glCopyTexSubImage1D</b>(</code></td><td>GLenum </td><td><var class="pdparam">target</var>, </td></tr><tr><td> </td><td>GLint </td><td><var class="pdparam">level</var>, </td></tr><tr><td> </td><td>GLint </td><td><var class="pdparam">xoffset</var>, </td></tr><tr><td> </td><td>GLint </td><td><var class="pdparam">x</var>, </td></tr><tr><td> </td><td>GLint </td><td><var class="pdparam">y</var>, </td></tr><tr><td> </td><td>GLsizei </td><td><var class="pdparam">width</var><code>)</code>;</td></tr></table></div></div><p> |
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5 | </p><div class="refsect1" lang="en" xml:lang="en"><a id="parameters"></a><h2>Parameters</h2><div class="variablelist"><dl><dt><span class="term"><em class="parameter"><code>target</code></em></span></dt><dd><p> |
6 | Specifies the target texture. | |
7 | Must be <code class="constant">GL_TEXTURE_1D</code>. | |
8 | </p></dd><dt><span class="term"><em class="parameter"><code>level</code></em></span></dt><dd><p> | |
9 | Specifies the level-of-detail number. | |
10 | Level 0 is the base image level. | |
11 | Level <span class="emphasis"><em>n</em></span> is the <span class="emphasis"><em>n</em></span>th mipmap reduction image. | |
12 | </p></dd><dt><span class="term"><em class="parameter"><code>xoffset</code></em></span></dt><dd><p> | |
13 | Specifies the texel offset within the texture array. | |
14 | </p></dd><dt><span class="term"><em class="parameter"><code>x</code></em>, </span><span class="term"><em class="parameter"><code>y</code></em></span></dt><dd><p> | |
15 | Specify the window coordinates of the left corner | |
16 | of the row of pixels to be copied. | |
17 | </p></dd><dt><span class="term"><em class="parameter"><code>width</code></em></span></dt><dd><p> | |
18 | Specifies the width of the texture subimage. | |
19 | </p></dd></dl></div></div><div class="refsect1" lang="en" xml:lang="en"><a id="description"></a><h2>Description</h2><p> | |
20 | <code class="function">glCopyTexSubImage1D</code> replaces a portion of a one-dimensional | |
21 | texture image with pixels from the current <code class="constant">GL_READ_BUFFER</code> (rather | |
22 | than from main memory, as is the case for <a href="glTexSubImage1D.xml"><span class="citerefentry"><span class="refentrytitle">glTexSubImage1D</span></span></a>). | |
23 | </p><p> | |
c7b31271 | 24 | The screen-aligned pixel row with left corner at (<em class="parameter"><code>x</code></em>, <em class="parameter"><code>y</code></em>), and with |
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25 | length <em class="parameter"><code>width</code></em> replaces the portion of the |
26 | texture array with x indices <em class="parameter"><code>xoffset</code></em> through | |
27 | <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> | |
28 | ||
29 | <mml:mrow> | |
30 | <mml:mi mathvariant="italic">xoffset</mml:mi> | |
31 | <mml:mo>+</mml:mo> | |
32 | <mml:mi mathvariant="italic">width</mml:mi> | |
33 | <mml:mo>-</mml:mo> | |
34 | <mml:mn>1</mml:mn> | |
35 | </mml:mrow> | |
36 | </mml:math>, | |
37 | inclusive. The destination in the texture array may not | |
38 | include any texels outside the texture array as it was | |
39 | originally specified. | |
40 | </p><p> | |
41 | The pixels in the row are processed exactly as if | |
42 | <a href="glReadPixels.xml"><span class="citerefentry"><span class="refentrytitle">glReadPixels</span></span></a> had been called, but the process stops just before | |
43 | final conversion. | |
44 | At this point, all pixel component values are clamped to the range | |
45 | <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> | |
46 | ||
47 | <mml:mfenced open="[" close="]"> | |
48 | <mml:mn>0</mml:mn> | |
49 | <mml:mn>1</mml:mn> | |
50 | </mml:mfenced> | |
51 | </mml:math> | |
52 | and then converted to the texture's internal format for storage in the texel | |
53 | array. | |
54 | </p><p> | |
55 | It is not an error to specify a subtexture with zero width, but | |
56 | such a specification has no effect. | |
57 | If any of the pixels within the specified row of the current | |
58 | <code class="constant">GL_READ_BUFFER</code> are outside the read window associated with the current | |
59 | rendering context, then the values obtained for those pixels are undefined. | |
60 | </p><p> | |
c7b31271 | 61 | No change is made to the <span class="emphasis"><em>internalformat</em></span> or <span class="emphasis"><em>width</em></span> parameters of the specified texture |
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62 | array or to texel values outside the specified subregion. |
63 | </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="notes"></a><h2>Notes</h2><p> | |
64 | The <a href="glPixelStore.xml"><span class="citerefentry"><span class="refentrytitle">glPixelStore</span></span></a> mode affects texture images. | |
65 | </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="errors"></a><h2>Errors</h2><p> | |
c7b31271 | 66 | <code class="constant">GL_INVALID_ENUM</code> is generated if <em class="parameter"><code>target</code></em> is not <code class="constant">GL_TEXTURE_1D</code>. |
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67 | </p><p> |
68 | <code class="constant">GL_INVALID_OPERATION</code> is generated if the texture array has not | |
69 | been defined by a previous <a href="glTexImage1D.xml"><span class="citerefentry"><span class="refentrytitle">glTexImage1D</span></span></a> or <a href="glCopyTexImage1D.xml"><span class="citerefentry"><span class="refentrytitle">glCopyTexImage1D</span></span></a> operation. | |
70 | </p><p> | |
71 | <code class="constant">GL_INVALID_VALUE</code> is generated if <em class="parameter"><code>level</code></em> is less than 0. | |
72 | </p><p> | |
73 | <code class="constant">GL_INVALID_VALUE</code> may be generated if | |
74 | <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> | |
75 | ||
76 | <mml:mrow> | |
77 | <mml:mi mathvariant="italic">level</mml:mi> | |
78 | <mml:mo>></mml:mo> | |
79 | <mml:mrow> | |
80 | <mml:msub><mml:mi mathvariant="italic">log</mml:mi> | |
81 | <mml:mn>2</mml:mn> | |
82 | </mml:msub> | |
83 | <mml:mo></mml:mo> | |
84 | <mml:mfenced open="(" close=")"> | |
85 | <mml:mi mathvariant="italic">max</mml:mi> | |
86 | </mml:mfenced> | |
87 | </mml:mrow> | |
88 | </mml:mrow> | |
89 | </mml:math>, | |
90 | where <span class="emphasis"><em>max</em></span> is the returned value of <code class="constant">GL_MAX_TEXTURE_SIZE</code>. | |
91 | </p><p> | |
92 | <code class="constant">GL_INVALID_VALUE</code> is generated if | |
93 | <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> | |
94 | ||
95 | <mml:mrow> | |
96 | <mml:mi mathvariant="italic">xoffset</mml:mi> | |
97 | <mml:mo><</mml:mo> | |
c7b31271 | 98 | <mml:mn>0</mml:mn> |
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99 | </mml:mrow> |
100 | </mml:math>, | |
101 | or | |
102 | <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> | |
103 | ||
104 | <mml:mrow> | |
105 | <mml:mfenced open="(" close=")"> | |
106 | <mml:mrow> | |
107 | <mml:mi mathvariant="italic">xoffset</mml:mi> | |
108 | <mml:mo>+</mml:mo> | |
109 | <mml:mi mathvariant="italic">width</mml:mi> | |
110 | </mml:mrow> | |
111 | </mml:mfenced> | |
112 | <mml:mo>></mml:mo> | |
c7b31271 | 113 | <mml:mi mathvariant="italic">w</mml:mi> |
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114 | </mml:mrow> |
115 | </mml:math>, | |
116 | where | |
117 | <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"><mml:mi mathvariant="italic">w</mml:mi></mml:math> | |
c7b31271 | 118 | is the <code class="constant">GL_TEXTURE_WIDTH</code> |
7faf1d71 | 119 | of the texture image being modified. |
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120 | </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="associatedgets"></a><h2>Associated Gets</h2><p> |
121 | <a href="glGetTexImage.xml"><span class="citerefentry"><span class="refentrytitle">glGetTexImage</span></span></a> | |
122 | </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="seealso"></a><h2>See Also</h2><p> | |
123 | <a href="glCopyTexImage1D.xml"><span class="citerefentry"><span class="refentrytitle">glCopyTexImage1D</span></span></a>, | |
124 | <a href="glCopyTexImage2D.xml"><span class="citerefentry"><span class="refentrytitle">glCopyTexImage2D</span></span></a>, | |
125 | <a href="glCopyTexSubImage2D.xml"><span class="citerefentry"><span class="refentrytitle">glCopyTexSubImage2D</span></span></a>, | |
126 | <a href="glCopyTexSubImage3D.xml"><span class="citerefentry"><span class="refentrytitle">glCopyTexSubImage3D</span></span></a>, | |
127 | <a href="glPixelStore.xml"><span class="citerefentry"><span class="refentrytitle">glPixelStore</span></span></a>, | |
128 | <a href="glReadBuffer.xml"><span class="citerefentry"><span class="refentrytitle">glReadBuffer</span></span></a>, | |
129 | <a href="glTexImage1D.xml"><span class="citerefentry"><span class="refentrytitle">glTexImage1D</span></span></a>, | |
130 | <a href="glTexImage2D.xml"><span class="citerefentry"><span class="refentrytitle">glTexImage2D</span></span></a>, | |
131 | <a href="glTexImage3D.xml"><span class="citerefentry"><span class="refentrytitle">glTexImage3D</span></span></a>, | |
132 | <a href="glTexParameter.xml"><span class="citerefentry"><span class="refentrytitle">glTexParameter</span></span></a>, | |
133 | <a href="glTexSubImage1D.xml"><span class="citerefentry"><span class="refentrytitle">glTexSubImage1D</span></span></a>, | |
134 | <a href="glTexSubImage2D.xml"><span class="citerefentry"><span class="refentrytitle">glTexSubImage2D</span></span></a>, | |
135 | <a href="glTexSubImage3D.xml"><span class="citerefentry"><span class="refentrytitle">glTexSubImage3D</span></span></a> | |
136 | </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="Copyright"></a><h2>Copyright</h2><p> | |
137 | Copyright <span class="trademark"></span>© 1991-2006 | |
138 | Silicon Graphics, Inc. This document is licensed under the SGI | |
139 | Free Software B License. For details, see | |
140 | <a href="http://oss.sgi.com/projects/FreeB/" target="_top">http://oss.sgi.com/projects/FreeB/</a>. | |
141 | </p></div></div></body></html> |