upstream-doc/man3/xhtml/glCopyTexSubImage3D.xml

   1 <?xml version="1.0" encoding="UTF-8"?>
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   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>glCopyTexSubImage3D - 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="glCopyTexSubImage3D"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>glCopyTexSubImage3D — copy a three-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">glCopyTexSubImage3D</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">yoffset</var>, </td></tr><tr><td> </td><td>GLint  </td><td><var class="pdparam">zoffset</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>, </td></tr><tr><td> </td><td>GLsizei  </td><td><var class="pdparam">height</var><code>)</code>;</td></tr></table></div></div><p>
   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_3D</code> or <code class="constant">GL_TEXTURE_2D_ARRAY</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 a texel offset in the x direction within the texture array.
  14                 </p></dd><dt><span class="term"><em class="parameter"><code>yoffset</code></em></span></dt><dd><p>
  15                     Specifies a texel offset in the y direction within the texture array.
  16                 </p></dd><dt><span class="term"><em class="parameter"><code>zoffset</code></em></span></dt><dd><p>
  17                     Specifies a texel offset in the z direction within the texture array.
  18                 </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>
  19                     Specify the window coordinates of the lower left corner
  20                     of the rectangular region of pixels to be copied.
  21                 </p></dd><dt><span class="term"><em class="parameter"><code>width</code></em></span></dt><dd><p>
  22                     Specifies the width of the texture subimage.
  23                 </p></dd><dt><span class="term"><em class="parameter"><code>height</code></em></span></dt><dd><p>
  24                     Specifies the height of the texture subimage.
  25                 </p></dd></dl></div></div><div class="refsect1" lang="en" xml:lang="en"><a id="description"></a><h2>Description</h2><p>
  26             <code class="function">glCopyTexSubImage3D</code> replaces a rectangular portion of a three-dimensional
  27             or two-dimensional array texture image with pixels from the current <code class="constant">GL_READ_BUFFER</code> (rather
  28             than from main memory, as is the case for <a href="glTexSubImage3D.xml"><span class="citerefentry"><span class="refentrytitle">glTexSubImage3D</span></span></a>).
  29         </p><p>
  30             The screen-aligned pixel rectangle with lower left corner at
  31             (<em class="parameter"><code>x</code></em>, <em class="parameter"><code>y</code></em>) and with
  32             width <em class="parameter"><code>width</code></em> and height <em class="parameter"><code>height</code></em> replaces the portion of the
  33             texture array with x indices <em class="parameter"><code>xoffset</code></em> through
  34             <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll">
  35
  36                 <mml:mrow>
  37                     <mml:mi mathvariant="italic">xoffset</mml:mi>
  38                     <mml:mo>+</mml:mo>
  39                     <mml:mi mathvariant="italic">width</mml:mi>
  40                     <mml:mo>-</mml:mo>
  41                     <mml:mn>1</mml:mn>
  42                 </mml:mrow>
  43             </mml:math>,
  44             inclusive, and y indices <em class="parameter"><code>yoffset</code></em> through
  45             <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll">
  46
  47                 <mml:mrow>
  48                     <mml:mi mathvariant="italic">yoffset</mml:mi>
  49                     <mml:mo>+</mml:mo>
  50                     <mml:mi mathvariant="italic">height</mml:mi>
  51                     <mml:mo>-</mml:mo>
  52                     <mml:mn>1</mml:mn>
  53                 </mml:mrow>
  54             </mml:math>,
  55             inclusive, at z index <em class="parameter"><code>zoffset</code></em> and at the mipmap level specified by <em class="parameter"><code>level</code></em>.
  56         </p><p>
  57             The pixels in the rectangle are processed exactly as if
  58             <a href="glReadPixels.xml"><span class="citerefentry"><span class="refentrytitle">glReadPixels</span></span></a> had been called, but the process stops just before
  59             final conversion.
  60             At this point, all pixel component values are clamped to the range
  61             <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll">
  62
  63                 <mml:mfenced open="[" close="]">
  64                     <mml:mn>0</mml:mn>
  65                     <mml:mn>1</mml:mn>
  66                 </mml:mfenced>
  67             </mml:math>
  68             and then converted to the texture's internal format for storage in the texel
  69             array.
  70         </p><p>
  71             The destination rectangle in the texture array may not include any texels
  72             outside the texture array as it was originally specified.
  73             It is not an error to specify a subtexture with zero width or height, but
  74             such a specification has no effect.
  75         </p><p>
  76             If any of the pixels within the specified rectangle of the current
  77             <code class="constant">GL_READ_BUFFER</code> are outside the read window associated with the current
  78             rendering context, then the values obtained for those pixels are undefined.
  79         </p><p>
  80             No change is made to the <span class="emphasis"><em>internalformat</em></span>, <span class="emphasis"><em>width</em></span>,
  81             <span class="emphasis"><em>height</em></span>, or <span class="emphasis"><em>depth</em></span> parameters of the specified texture
  82             array or to texel values outside the specified subregion.
  83         </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="notes"></a><h2>Notes</h2><p>
  84             <a href="glPixelStore.xml"><span class="citerefentry"><span class="refentrytitle">glPixelStore</span></span></a> modes affect texture images.
  85         </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="errors"></a><h2>Errors</h2><p>
  86             <code class="constant">GL_INVALID_ENUM</code> is generated if <em class="parameter"><code>target</code></em> is not <code class="constant">GL_TEXTURE_3D</code> or <code class="constant">GL_TEXTURE_2D_ARRAY</code>.
  87         </p><p>
  88             <code class="constant">GL_INVALID_OPERATION</code> is generated if the texture array has not
  89             been defined by a previous <a href="glTexImage3D.xml"><span class="citerefentry"><span class="refentrytitle">glTexImage3D</span></span></a> operation.
  90         </p><p>
  91             <code class="constant">GL_INVALID_VALUE</code> is generated if <em class="parameter"><code>level</code></em> is less than 0.
  92         </p><p>
  93             <code class="constant">GL_INVALID_VALUE</code> may be generated if
  94             <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll">
  95
  96                 <mml:mrow>
  97                     <mml:mi mathvariant="italic">level</mml:mi>
  98                     <mml:mo>&gt;</mml:mo>
  99                     <mml:mrow>
 100                         <mml:msub><mml:mi mathvariant="italic">log</mml:mi>
 101                         <mml:mn>2</mml:mn>
 102                         </mml:msub>
 103                         <mml:mo>⁡</mml:mo>
 104                         <mml:mfenced open="(" close=")">
 105                             <mml:mi mathvariant="italic">max</mml:mi>
 106                         </mml:mfenced>
 107                     </mml:mrow>
 108                 </mml:mrow>
 109             </mml:math>,
 110             where
 111             is the returned value of <code class="constant">GL_MAX_3D_TEXTURE_SIZE</code> if <em class="parameter"><code>target</code></em>
 112             is <code class="constant">GL_TEXTURE_3D</code> or the returned value of <code class="constant">GL_MAX_ARRAY_TEXTURE_LAYERS</code>
 113             if <em class="parameter"><code>target</code></em> is <code class="constant">GL_TEXTURE_2D_ARRAY</code>.
 114         </p><p>
 115             <code class="constant">GL_INVALID_VALUE</code> is generated if
 116             <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll">
 117
 118                 <mml:mrow>
 119                     <mml:mi mathvariant="italic">xoffset</mml:mi>
 120                     <mml:mo>&lt;</mml:mo>
 121                     <mml:mn>0</mml:mn>
 122                 </mml:mrow>
 123             </mml:math>,
 124             <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll">
 125
 126                 <mml:mrow>
 127                     <mml:mfenced open="(" close=")">
 128                         <mml:mrow>
 129                             <mml:mi mathvariant="italic">xoffset</mml:mi>
 130                             <mml:mo>+</mml:mo>
 131                             <mml:mi mathvariant="italic">width</mml:mi>
 132                         </mml:mrow>
 133                     </mml:mfenced>
 134                     <mml:mo>&gt;</mml:mo>
 135                     <mml:mi mathvariant="italic">w</mml:mi>
 136                 </mml:mrow>
 137             </mml:math>,
 138             <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll">
 139
 140                 <mml:mrow>
 141                     <mml:mi mathvariant="italic">yoffset</mml:mi>
 142                     <mml:mo>&lt;</mml:mo>
 143                     <mml:mn>0</mml:mn>
 144                 </mml:mrow>
 145             </mml:math>,
 146             <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll">
 147
 148                 <mml:mrow>
 149                     <mml:mfenced open="(" close=")">
 150                         <mml:mrow>
 151                             <mml:mi mathvariant="italic">yoffset</mml:mi>
 152                             <mml:mo>+</mml:mo>
 153                             <mml:mi mathvariant="italic">height</mml:mi>
 154                         </mml:mrow>
 155                     </mml:mfenced>
 156                     <mml:mo>&gt;</mml:mo>
 157                     <mml:mi mathvariant="italic">h</mml:mi>
 158                 </mml:mrow>
 159             </mml:math>,
 160             <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll">
 161
 162                 <mml:mrow>
 163                     <mml:mi mathvariant="italic">zoffset</mml:mi>
 164                     <mml:mo>&lt;</mml:mo>
 165                     <mml:mn>0</mml:mn>
 166                 </mml:mrow>
 167             </mml:math>,
 168             or
 169             <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll">
 170
 171                 <mml:mrow>
 172                      <mml:mfenced open="(" close=")">
 173                         <mml:mrow>
 174                             <mml:mi mathvariant="italic">zoffset</mml:mi>
 175                             <mml:mo>+</mml:mo>
 176                             <mml:mn>1</mml:mn>
 177                         </mml:mrow>
 178                     </mml:mfenced>
 179                     <mml:mo>&gt;</mml:mo>
 180                     <mml:mi mathvariant="italic">d</mml:mi>
 181                 </mml:mrow>
 182             </mml:math>,
 183             where
 184             <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"><mml:mi mathvariant="italic">w</mml:mi></mml:math>
 185             is the <code class="constant">GL_TEXTURE_WIDTH</code>,
 186             <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"><mml:mi mathvariant="italic">h</mml:mi></mml:math>
 187             is the <code class="constant">GL_TEXTURE_HEIGHT</code>, and
 188             <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"><mml:mi mathvariant="italic">d</mml:mi></mml:math>
 189             is the <code class="constant">GL_TEXTURE_DEPTH</code>
 190             of the texture image being modified.
 191         </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="associatedgets"></a><h2>Associated Gets</h2><p>
 192             <a href="glGetTexImage.xml"><span class="citerefentry"><span class="refentrytitle">glGetTexImage</span></span></a>
 193         </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="seealso"></a><h2>See Also</h2><p>
 194             <a href="glCopyTexImage1D.xml"><span class="citerefentry"><span class="refentrytitle">glCopyTexImage1D</span></span></a>,
 195             <a href="glCopyTexImage2D.xml"><span class="citerefentry"><span class="refentrytitle">glCopyTexImage2D</span></span></a>,
 196             <a href="glCopyTexSubImage1D.xml"><span class="citerefentry"><span class="refentrytitle">glCopyTexSubImage1D</span></span></a>,
 197             <a href="glCopyTexSubImage2D.xml"><span class="citerefentry"><span class="refentrytitle">glCopyTexSubImage2D</span></span></a>,
 198             <a href="glPixelStore.xml"><span class="citerefentry"><span class="refentrytitle">glPixelStore</span></span></a>,
 199             <a href="glReadBuffer.xml"><span class="citerefentry"><span class="refentrytitle">glReadBuffer</span></span></a>,
 200             <a href="glTexImage1D.xml"><span class="citerefentry"><span class="refentrytitle">glTexImage1D</span></span></a>,
 201             <a href="glTexImage2D.xml"><span class="citerefentry"><span class="refentrytitle">glTexImage2D</span></span></a>,
 202             <a href="glTexImage3D.xml"><span class="citerefentry"><span class="refentrytitle">glTexImage3D</span></span></a>,
 203             <a href="glTexParameter.xml"><span class="citerefentry"><span class="refentrytitle">glTexParameter</span></span></a>,
 204             <a href="glTexSubImage1D.xml"><span class="citerefentry"><span class="refentrytitle">glTexSubImage1D</span></span></a>,
 205             <a href="glTexSubImage2D.xml"><span class="citerefentry"><span class="refentrytitle">glTexSubImage2D</span></span></a>,
 206             <a href="glTexSubImage3D.xml"><span class="citerefentry"><span class="refentrytitle">glTexSubImage3D</span></span></a>
 207         </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="Copyright"></a><h2>Copyright</h2><p>
 208             Copyright <span class="trademark"></span>© 1991-2006
 209             Silicon Graphics, Inc. This document is licensed under the SGI
 210             Free Software B License. For details, see
 211             <a href="http://oss.sgi.com/projects/FreeB/" target="_top">http://oss.sgi.com/projects/FreeB/</a>.
 212         </p></div></div></body></html>