upstream-doc/man3/xhtml/glTexImage2D.xml

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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>glTexImage2D - 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="glTexImage2D"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>glTexImage2D — specify a two-dimensional texture image</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">glTexImage2D</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">internalFormat</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>, </td></tr><tr><td> </td><td>GLint  </td><td><var class="pdparam">border</var>, </td></tr><tr><td> </td><td>GLenum  </td><td><var class="pdparam">format</var>, </td></tr><tr><td> </td><td>GLenum  </td><td><var class="pdparam">type</var>, </td></tr><tr><td> </td><td>const GLvoid *  </td><td><var class="pdparam">data</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_2D</code>, <code class="constant">GL_PROXY_TEXTURE_2D</code>,
   8                     <code class="constant">GL_TEXTURE_1D_ARRAY</code>, <code class="constant">GL_PROXY_TEXTURE_1D_ARRAY</code>,
   9                     <code class="constant">GL_TEXTURE_RECTANGLE</code>, <code class="constant">GL_PROXY_TEXTURE_RECTANGLE</code>,
  10                     <code class="constant">GL_TEXTURE_CUBE_MAP_POSITIVE_X</code>,
  11                     <code class="constant">GL_TEXTURE_CUBE_MAP_NEGATIVE_X</code>,
  12                     <code class="constant">GL_TEXTURE_CUBE_MAP_POSITIVE_Y</code>,
  13                     <code class="constant">GL_TEXTURE_CUBE_MAP_NEGATIVE_Y</code>,
  14                     <code class="constant">GL_TEXTURE_CUBE_MAP_POSITIVE_Z</code>,
  15                     <code class="constant">GL_TEXTURE_CUBE_MAP_NEGATIVE_Z</code>, or
  16                     <code class="constant">GL_PROXY_TEXTURE_CUBE_MAP</code>.
  17                 </p></dd><dt><span class="term"><em class="parameter"><code>level</code></em></span></dt><dd><p>
  18                     Specifies the level-of-detail number.
  19                     Level 0 is the base image level.
  20                     Level <span class="emphasis"><em>n</em></span> is the <span class="emphasis"><em>n</em></span>th mipmap reduction image.
  21                     If <em class="parameter"><code>target</code></em> is <code class="constant">GL_TEXTURE_RECTANGLE</code> or
  22                     <code class="constant">GL_PROXY_TEXTURE_RECTANGLE</code>, <em class="parameter"><code>level</code></em> must be 0.
  23                 </p></dd><dt><span class="term"><em class="parameter"><code>internalFormat</code></em></span></dt><dd><p>
  24                     Specifies the number of color components in the texture.
  25                     Must be one of base internal formats given in Table 1,
  26                     one of the sized internal formats given in Table 2, or one
  27                     of the compressed internal formats given in Table 3, below.
  28                 </p></dd><dt><span class="term"><em class="parameter"><code>width</code></em></span></dt><dd><p>
  29                     Specifies the width of the texture image.
  30                     All implementations support texture images that are at least 1024 texels
  31                     wide.
  32                 </p></dd><dt><span class="term"><em class="parameter"><code>height</code></em></span></dt><dd><p>
  33                     Specifies the height of the texture image, or the number of layers in a texture
  34                     array, in the case of the <code class="constant">GL_TEXTURE_1D_ARRAY</code> and
  35                     <code class="constant">GL_PROXY_TEXTURE_1D_ARRAY</code> targets.
  36                     All implementations support 2D texture images that are at least 1024 texels
  37                     high, and texture arrays that are at least 256 layers deep.
  38                 </p></dd><dt><span class="term"><em class="parameter"><code>border</code></em></span></dt><dd><p>
  39                     This value must be 0.
  40                 </p></dd><dt><span class="term"><em class="parameter"><code>format</code></em></span></dt><dd><p>
  41                     Specifies the format of the pixel data.
  42                     The following symbolic values are accepted:
  43                     <code class="constant">GL_RED</code>,
  44                     <code class="constant">GL_RG</code>,
  45                     <code class="constant">GL_RGB</code>,
  46                     <code class="constant">GL_BGR</code>,
  47                     <code class="constant">GL_RGBA</code>, and
  48                     <code class="constant">GL_BGRA</code>.
  49                 </p></dd><dt><span class="term"><em class="parameter"><code>type</code></em></span></dt><dd><p>
  50                     Specifies the data type of the pixel data.
  51                     The following symbolic values are accepted:
  52                     <code class="constant">GL_UNSIGNED_BYTE</code>,
  53                     <code class="constant">GL_BYTE</code>,
  54                     <code class="constant">GL_UNSIGNED_SHORT</code>,
  55                     <code class="constant">GL_SHORT</code>,
  56                     <code class="constant">GL_UNSIGNED_INT</code>,
  57                     <code class="constant">GL_INT</code>,
  58                     <code class="constant">GL_FLOAT</code>,
  59                     <code class="constant">GL_UNSIGNED_BYTE_3_3_2</code>,
  60                     <code class="constant">GL_UNSIGNED_BYTE_2_3_3_REV</code>,
  61                     <code class="constant">GL_UNSIGNED_SHORT_5_6_5</code>,
  62                     <code class="constant">GL_UNSIGNED_SHORT_5_6_5_REV</code>,
  63                     <code class="constant">GL_UNSIGNED_SHORT_4_4_4_4</code>,
  64                     <code class="constant">GL_UNSIGNED_SHORT_4_4_4_4_REV</code>,
  65                     <code class="constant">GL_UNSIGNED_SHORT_5_5_5_1</code>,
  66                     <code class="constant">GL_UNSIGNED_SHORT_1_5_5_5_REV</code>,
  67                     <code class="constant">GL_UNSIGNED_INT_8_8_8_8</code>,
  68                     <code class="constant">GL_UNSIGNED_INT_8_8_8_8_REV</code>,
  69                     <code class="constant">GL_UNSIGNED_INT_10_10_10_2</code>, and
  70                     <code class="constant">GL_UNSIGNED_INT_2_10_10_10_REV</code>.
  71                 </p></dd><dt><span class="term"><em class="parameter"><code>data</code></em></span></dt><dd><p>
  72                     Specifies a pointer to the image data in memory.
  73                 </p></dd></dl></div></div><div class="refsect1" lang="en" xml:lang="en"><a id="description"></a><h2>Description</h2><p>
  74             Texturing allows elements of an image array to be read by shaders.
  75         </p><p>
  76             To define texture images, call <code class="function">glTexImage2D</code>.
  77             The arguments describe the parameters of the texture image,
  78             such as height, width, width of the border, level-of-detail number
  79             (see <a href="glTexParameter.xml"><span class="citerefentry"><span class="refentrytitle">glTexParameter</span></span></a>),
  80             and number of color components provided.
  81             The last three arguments describe how the image is represented in memory.
  82         </p><p>
  83             If <em class="parameter"><code>target</code></em> is <code class="constant">GL_PROXY_TEXTURE_2D</code>, <code class="constant">GL_PROXY_TEXTURE_1D_ARRAY</code>,
  84             <code class="constant">GL_PROXY_TEXTURE_CUBE_MAP</code>, or <code class="constant">GL_PROXY_TEXTURE_RECTANGLE</code>,
  85             no data is read from <em class="parameter"><code>data</code></em>, but
  86             all of the texture image state is recalculated, checked for
  87             consistency, and checked
  88             against the implementation's capabilities. If the implementation cannot
  89             handle a texture of the requested texture size, it sets
  90             all of the image state to 0,
  91             but does not generate an error (see <a href="glGetError.xml"><span class="citerefentry"><span class="refentrytitle">glGetError</span></span></a>). To query for an
  92             entire mipmap array, use an image array level greater than or equal to 1.
  93         </p><p>
  94             If <em class="parameter"><code>target</code></em> is <code class="constant">GL_TEXTURE_2D</code>, <code class="constant">GL_TEXTURE_RECTANGLE</code>
  95             or one of the <code class="constant">GL_TEXTURE_CUBE_MAP</code>
  96             targets, data is read from <em class="parameter"><code>data</code></em> as a sequence of signed or unsigned
  97             bytes, shorts, or longs, or single-precision floating-point values,
  98             depending on <em class="parameter"><code>type</code></em>.  These values are grouped into sets of one, two,
  99             three, or four values, depending on <em class="parameter"><code>format</code></em>, to form elements.
 100             Each data byte is treated as eight 1-bit elements,
 101             with bit ordering determined by <code class="constant">GL_UNPACK_LSB_FIRST</code>
 102             (see <a href="glPixelStore.xml"><span class="citerefentry"><span class="refentrytitle">glPixelStore</span></span></a>).
 103         </p><p>
 104             If <em class="parameter"><code>target</code></em> is <code class="constant">GL_TEXTURE_1D_ARRAY</code>, data is interpreted
 105             as an array of one-dimensional images.
 106         </p><p>
 107             If a non-zero named buffer object is bound to the <code class="constant">GL_PIXEL_UNPACK_BUFFER</code> target
 108             (see <a href="glBindBuffer.xml"><span class="citerefentry"><span class="refentrytitle">glBindBuffer</span></span></a>) while a texture image is
 109             specified, <em class="parameter"><code>data</code></em> is treated as a byte offset into the buffer object's data store.
 110         </p><p>
 111             The first element corresponds to the lower left corner of the texture image.
 112             Subsequent elements progress left-to-right through the remaining texels
 113             in the lowest row of the texture image, and then in successively higher
 114             rows of the texture image.
 115             The final element corresponds to the upper right corner of the texture
 116             image.
 117         </p><p>
 118             <em class="parameter"><code>format</code></em> determines the composition of each element in <em class="parameter"><code>data</code></em>.
 119             It can assume one of these symbolic values:
 120         </p><div class="variablelist"><dl><dt><span class="term"><code class="constant">GL_RED</code></span></dt><dd><p>
 121                         Each element is a single red component.
 122                         The GL converts it to floating point and assembles it into an RGBA element
 123                         by attaching 0 for green and blue, and 1 for alpha.
 124                         Each component is clamped to the range [0,1].
 125                     </p></dd><dt><span class="term"><code class="constant">GL_RG</code></span></dt><dd><p>
 126                         Each element is a red/green double.
 127                         The GL converts it to floating point and assembles it into an RGBA element
 128                         by attaching 0 for blue, and 1 for alpha.
 129                         Each component is clamped to the range [0,1].
 130                     </p></dd><dt><span class="term"><code class="constant">GL_RGB</code></span></dt><dd></dd><dt><span class="term"><code class="constant">GL_BGR</code></span></dt><dd><p>
 131                         Each element is an RGB triple.
 132                         The GL converts it to floating point and assembles it into an RGBA element
 133                         by attaching 1 for alpha.
 134                         Each component clamped to the range [0,1].
 135                     </p></dd><dt><span class="term"><code class="constant">GL_RGBA</code></span></dt><dd></dd><dt><span class="term"><code class="constant">GL_BGRA</code></span></dt><dd><p>
 136                         Each element contains all four components.
 137                         Each component is clamped to the range [0,1].
 138                     </p></dd><dt><span class="term"><code class="constant">GL_DEPTH_COMPONENT</code></span></dt><dd><p>
 139                         Each element is a single depth value.
 140                         The GL converts it to floating point,
 141                         and clamps to the range [0,1].
 142                     </p></dd><dt><span class="term"><code class="constant">GL_DEPTH_STENCIL</code></span></dt><dd><p>
 143                         Each element is a pair of depth and stencil values. The depth component of
 144                         the pair is interpreted as in <code class="constant">GL_DEPTH_COMPONENT</code>. The stencil
 145                         component is interpreted based on specified the depth + stencil internal format.
 146                      </p></dd></dl></div><p>
 147             If an application wants to store the texture at a certain
 148             resolution or in a certain format, it can request the resolution
 149             and format with <em class="parameter"><code>internalFormat</code></em>. The GL will choose an internal
 150             representation that closely approximates that requested by <em class="parameter"><code>internalFormat</code></em>, but
 151             it may not match exactly.
 152             (The representations specified by <code class="constant">GL_RED</code>,
 153             <code class="constant">GL_RG</code>, <code class="constant">GL_RGB</code>,
 154             and <code class="constant">GL_RGBA</code> must match exactly.)
 155         </p><p>
 156             If the <em class="parameter"><code>internalFormat</code></em> parameter is one of the generic compressed formats,
 157             <code class="constant">GL_COMPRESSED_RED</code>, <code class="constant">GL_COMPRESSED_RG</code>,
 158             <code class="constant">GL_COMPRESSED_RGB</code>, or
 159             <code class="constant">GL_COMPRESSED_RGBA</code>, the GL will replace the internal format with the symbolic constant for a specific internal format and compress the texture before storage.  If no corresponding internal format is available, or the GL can not compress that image for any reason, the internal format is instead replaced with a corresponding base internal format.
 160         </p><p>
 161             If the <em class="parameter"><code>internalFormat</code></em> parameter is
 162             <code class="constant">GL_SRGB</code>,
 163             <code class="constant">GL_SRGB8</code>,
 164             <code class="constant">GL_SRGB_ALPHA</code>, or
 165             <code class="constant">GL_SRGB8_ALPHA8</code>, the texture is treated as if the red, green, or blue components are encoded in the sRGB color space.    Any alpha component is left unchanged.  The conversion from the sRGB encoded component
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 254             Assume
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 260             is the sRGB component in the range [0,1].
 261        </p><p>
 262             Use the <code class="constant">GL_PROXY_TEXTURE_2D</code>, <code class="constant">GL_PROXY_TEXTURE_1D_ARRAY</code>,
 263             <code class="constant">GL_PROXY_TEXTURE_RECTANGLE</code>, or <code class="constant">GL_PROXY_TEXTURE_CUBE_MAP</code> target to try out a resolution and
 264             format. The implementation will
 265             update and recompute its best match for the requested storage resolution
 266             and format. To then query this state, call <a href="glGetTexLevelParameter.xml"><span class="citerefentry"><span class="refentrytitle">glGetTexLevelParameter</span></span></a>.
 267             If the texture cannot be accommodated, texture state is set to 0.
 268         </p><p>
 269             A one-component texture image uses only the red component of the RGBA
 270             color extracted from <em class="parameter"><code>data</code></em>.
 271             A two-component image uses the R and G values.
 272             A three-component image uses the R, G, and B values.
 273             A four-component image uses all of the RGBA components.
 274         </p><p>
 275                   Image-based shadowing can be enabled by comparing texture r coordinates to
 276                   depth texture values to generate a boolean result.
 277                   See <a href="glTexParameter.xml"><span class="citerefentry"><span class="refentrytitle">glTexParameter</span></span></a> for details on texture comparison.
 278         </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="notes"></a><h2>Notes</h2><p>
 279             The <a href="glPixelStore.xml"><span class="citerefentry"><span class="refentrytitle">glPixelStore</span></span></a> mode affects texture images.
 280         </p><p>
 281             <em class="parameter"><code>data</code></em> may be a null pointer.
 282             In this case, texture memory is
 283             allocated to accommodate a texture of width <em class="parameter"><code>width</code></em> and height <em class="parameter"><code>height</code></em>.
 284             You can then download subtextures to initialize this
 285             texture memory.
 286             The image is undefined if the user tries to apply
 287             an uninitialized portion of the texture image to a primitive.
 288         </p><p>
 289             <code class="function">glTexImage2D</code> specifies the two-dimensional texture for the current texture unit,
 290             specified with <a href="glActiveTexture.xml"><span class="citerefentry"><span class="refentrytitle">glActiveTexture</span></span></a>.
 291         </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="errors"></a><h2>Errors</h2><p>
 292             <code class="constant">GL_INVALID_ENUM</code> is generated if <em class="parameter"><code>target</code></em> is not
 293             <code class="constant">GL_TEXTURE_2D</code>,
 294             <code class="constant">GL_TEXTURE_1D_ARRAY</code>,
 295             <code class="constant">GL_TEXTURE_RECTANGLE</code>,
 296             <code class="constant">GL_PROXY_TEXTURE_2D</code>,
 297             <code class="constant">GL_PROXY_TEXTURE_1D_ARRAY</code>,
 298             <code class="constant">GL_PROXY_TEXTURE_RECTANGLE</code>,
 299             <code class="constant">GL_PROXY_TEXTURE_CUBE_MAP</code>,
 300             <code class="constant">GL_TEXTURE_CUBE_MAP_POSITIVE_X</code>,
 301             <code class="constant">GL_TEXTURE_CUBE_MAP_NEGATIVE_X</code>,
 302             <code class="constant">GL_TEXTURE_CUBE_MAP_POSITIVE_Y</code>,
 303             <code class="constant">GL_TEXTURE_CUBE_MAP_NEGATIVE_Y</code>,
 304             <code class="constant">GL_TEXTURE_CUBE_MAP_POSITIVE_Z</code>, or
 305             <code class="constant">GL_TEXTURE_CUBE_MAP_NEGATIVE_Z</code>.
 306         </p><p>
 307             <code class="constant">GL_INVALID_ENUM</code> is generated if <em class="parameter"><code>target</code></em> is one of the six cube map 2D image targets and the width and height parameters are not equal.
 308         </p><p>
 309             <code class="constant">GL_INVALID_ENUM</code> is generated if <em class="parameter"><code>type</code></em> is not a type constant.
 310         </p><p>
 311             <code class="constant">GL_INVALID_VALUE</code> is generated if <em class="parameter"><code>width</code></em> is less than 0
 312             or greater than <code class="constant">GL_MAX_TEXTURE_SIZE</code>.
 313         </p><p>
 314             <code class="constant">GL_INVALID_VALUE</code> is generated if <em class="parameter"><code>target</code></em> is not <code class="constant">GL_TEXTURE_1D_ARRAY</code> or
 315             <code class="constant">GL_PROXY_TEXTURE_1D_ARRAY</code> and <em class="parameter"><code>height</code></em> is less than 0 or greater than <code class="constant">GL_MAX_TEXTURE_SIZE</code>.
 316         </p><p>
 317             <code class="constant">GL_INVALID_VALUE</code> is generated if <em class="parameter"><code>target</code></em> is <code class="constant">GL_TEXTURE_1D_ARRAY</code> or
 318             <code class="constant">GL_PROXY_TEXTURE_1D_ARRAY</code> and <em class="parameter"><code>height</code></em> is less than 0 or greater than <code class="constant">GL_MAX_ARRAY_TEXTURE_LAYERS</code>.
 319         </p><p>
 320             <code class="constant">GL_INVALID_VALUE</code> is generated if <em class="parameter"><code>level</code></em> is less than 0.
 321         </p><p>
 322             <code class="constant">GL_INVALID_VALUE</code> may be generated if <em class="parameter"><code>level</code></em> is greater than
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 335             where <span class="emphasis"><em>max</em></span> is the returned value of <code class="constant">GL_MAX_TEXTURE_SIZE</code>.
 336         </p><p>
 337             <code class="constant">GL_INVALID_VALUE</code> is generated if <em class="parameter"><code>internalFormat</code></em> is not one of the
 338             accepted resolution and format symbolic constants.
 339         </p><p>
 340             <code class="constant">GL_INVALID_VALUE</code> is generated if <em class="parameter"><code>width</code></em> or <em class="parameter"><code>height</code></em> is less than 0
 341             or greater than <code class="constant">GL_MAX_TEXTURE_SIZE</code>.
 342         </p><p>
 343             <code class="constant">GL_INVALID_VALUE</code> is generated if non-power-of-two textures are not supported and the <em class="parameter"><code>width</code></em> or <em class="parameter"><code>height</code></em> cannot be represented as
 344             <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll">
 345
 346                 <mml:mrow>
 347                     <mml:msup><mml:mn>2</mml:mn>
 348                     <mml:mi mathvariant="italic">k</mml:mi>
 349                     </mml:msup>
 350                     <mml:mo>+</mml:mo>
 351                     <mml:mrow>
 352                         <mml:mn>2</mml:mn>
 353                         <mml:mo>⁡</mml:mo>
 354                         <mml:mfenced open="(" close=")">
 355                             <mml:mi mathvariant="italic">border</mml:mi>
 356                         </mml:mfenced>
 357                     </mml:mrow>
 358                 </mml:mrow>
 359             </mml:math>
 360             for some
 361             integer value of <span class="emphasis"><em>k</em></span>.
 362         </p><p>
 363             <code class="constant">GL_INVALID_VALUE</code> is generated if <em class="parameter"><code>border</code></em> is not 0.
 364         </p><p>
 365             <code class="constant">GL_INVALID_OPERATION</code> is generated if <em class="parameter"><code>type</code></em> is one of
 366             <code class="constant">GL_UNSIGNED_BYTE_3_3_2</code>,
 367             <code class="constant">GL_UNSIGNED_BYTE_2_3_3_REV</code>,
 368             <code class="constant">GL_UNSIGNED_SHORT_5_6_5</code>,
 369             <code class="constant">GL_UNSIGNED_SHORT_5_6_5_REV</code>, or
 370             <code class="constant">GL_UNSIGNED_INT_10F_11F_11F_REV</code>,
 371             and <em class="parameter"><code>format</code></em> is not <code class="constant">GL_RGB</code>.
 372         </p><p>
 373             <code class="constant">GL_INVALID_OPERATION</code> is generated if <em class="parameter"><code>type</code></em> is one of
 374             <code class="constant">GL_UNSIGNED_SHORT_4_4_4_4</code>,
 375             <code class="constant">GL_UNSIGNED_SHORT_4_4_4_4_REV</code>,
 376             <code class="constant">GL_UNSIGNED_SHORT_5_5_5_1</code>,
 377             <code class="constant">GL_UNSIGNED_SHORT_1_5_5_5_REV</code>,
 378             <code class="constant">GL_UNSIGNED_INT_8_8_8_8</code>,
 379             <code class="constant">GL_UNSIGNED_INT_8_8_8_8_REV</code>,
 380             <code class="constant">GL_UNSIGNED_INT_10_10_10_2</code>,
 381             <code class="constant">GL_UNSIGNED_INT_2_10_10_10_REV</code>, or
 382             <code class="constant">GL_UNSIGNED_INT_5_9_9_9_REV</code>,
 383             and <em class="parameter"><code>format</code></em> is neither <code class="constant">GL_RGBA</code> nor <code class="constant">GL_BGRA</code>.
 384         </p><p>
 385             <code class="constant">GL_INVALID_OPERATION</code> is generated if <em class="parameter"><code>target</code></em> is not
 386             <code class="constant">GL_TEXTURE_2D</code>, <code class="constant">GL_PROXY_TEXTURE_2D</code>,
 387             <code class="constant">GL_TEXTURE_RECTANGLE</code>, or <code class="constant">GL_PROXY_TEXTURE_RECTANGLE</code>,
 388             and <em class="parameter"><code>internalFormat</code></em> is
 389             <code class="constant">GL_DEPTH_COMPONENT</code>, <code class="constant">GL_DEPTH_COMPONENT16</code>,
 390             <code class="constant">GL_DEPTH_COMPONENT24</code>, or <code class="constant">GL_DEPTH_COMPONENT32F</code>.
 391         </p><p>
 392             <code class="constant">GL_INVALID_OPERATION</code> is generated if <em class="parameter"><code>format</code></em> is
 393             <code class="constant">GL_DEPTH_COMPONENT</code> and <em class="parameter"><code>internalFormat</code></em> is not
 394             <code class="constant">GL_DEPTH_COMPONENT</code>, <code class="constant">GL_DEPTH_COMPONENT16</code>,
 395             <code class="constant">GL_DEPTH_COMPONENT24</code>, or <code class="constant">GL_DEPTH_COMPONENT32F</code>.
 396         </p><p>
 397             <code class="constant">GL_INVALID_OPERATION</code> is generated if <em class="parameter"><code>internalFormat</code></em> is
 398             <code class="constant">GL_DEPTH_COMPONENT</code>, <code class="constant">GL_DEPTH_COMPONENT16</code>,
 399             <code class="constant">GL_DEPTH_COMPONENT24</code>, or <code class="constant">GL_DEPTH_COMPONENT32F</code>, and <em class="parameter"><code>format</code></em> is
 400             not <code class="constant">GL_DEPTH_COMPONENT</code>.
 401         </p><p>
 402             <code class="constant">GL_INVALID_OPERATION</code> is generated if a non-zero buffer object name is bound to the
 403             <code class="constant">GL_PIXEL_UNPACK_BUFFER</code> target and the buffer object's data store is currently mapped.
 404         </p><p>
 405             <code class="constant">GL_INVALID_OPERATION</code> is generated if a non-zero buffer object name is bound to the
 406             <code class="constant">GL_PIXEL_UNPACK_BUFFER</code> target and the data would be unpacked from the buffer
 407             object such that the memory reads required would exceed the data store size.
 408         </p><p>
 409             <code class="constant">GL_INVALID_OPERATION</code> is generated if a non-zero buffer object name is bound to the
 410             <code class="constant">GL_PIXEL_UNPACK_BUFFER</code> target and <em class="parameter"><code>data</code></em> is not evenly divisible
 411             into the number of bytes needed to store in memory a datum indicated by <em class="parameter"><code>type</code></em>.
 412         </p><p>
 413             <code class="constant">GL_INVALID_VALUE</code> is generated if <em class="parameter"><code>target</code></em> is <code class="constant">GL_TEXTURE_RECTANGLE</code>
 414             or <code class="constant">GL_PROXY_TEXTURE_RECTANGLE</code> and <em class="parameter"><code>level</code></em> is not 0.
 415         </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="associatedgets"></a><h2>Associated Gets</h2><p>
 416             <a href="glGetTexImage.xml"><span class="citerefentry"><span class="refentrytitle">glGetTexImage</span></span></a>
 417         </p><p>
 418             <a href="glGet.xml"><span class="citerefentry"><span class="refentrytitle">glGet</span></span></a> with argument <code class="constant">GL_PIXEL_UNPACK_BUFFER_BINDING</code>
 419         </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="seealso"></a><h2>See Also</h2><p>
 420             <a href="glActiveTexture.xml"><span class="citerefentry"><span class="refentrytitle">glActiveTexture</span></span></a>,
 421             <a href="glCopyTexImage1D.xml"><span class="citerefentry"><span class="refentrytitle">glCopyTexImage1D</span></span></a>,
 422             <a href="glCopyTexImage2D.xml"><span class="citerefentry"><span class="refentrytitle">glCopyTexImage2D</span></span></a>,
 423             <a href="glCopyTexSubImage1D.xml"><span class="citerefentry"><span class="refentrytitle">glCopyTexSubImage1D</span></span></a>,
 424             <a href="glCopyTexSubImage2D.xml"><span class="citerefentry"><span class="refentrytitle">glCopyTexSubImage2D</span></span></a>,
 425             <a href="glCopyTexSubImage3D.xml"><span class="citerefentry"><span class="refentrytitle">glCopyTexSubImage3D</span></span></a>,
 426             <a href="glPixelStore.xml"><span class="citerefentry"><span class="refentrytitle">glPixelStore</span></span></a>,
 427             <a href="glTexImage1D.xml"><span class="citerefentry"><span class="refentrytitle">glTexImage1D</span></span></a>,
 428             <a href="glTexImage3D.xml"><span class="citerefentry"><span class="refentrytitle">glTexImage3D</span></span></a>,
 429             <a href="glTexSubImage1D.xml"><span class="citerefentry"><span class="refentrytitle">glTexSubImage1D</span></span></a>,
 430             <a href="glTexSubImage2D.xml"><span class="citerefentry"><span class="refentrytitle">glTexSubImage2D</span></span></a>,
 431             <a href="glTexSubImage3D.xml"><span class="citerefentry"><span class="refentrytitle">glTexSubImage3D</span></span></a>,
 432             <a href="glTexParameter.xml"><span class="citerefentry"><span class="refentrytitle">glTexParameter</span></span></a>
 433         </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="Copyright"></a><h2>Copyright</h2><p>
 434             Copyright <span class="trademark"></span>© 1991-2006
 435             Silicon Graphics, Inc. This document is licensed under the SGI
 436             Free Software B License. For details, see
 437             <a href="http://oss.sgi.com/projects/FreeB/" target="_top">http://oss.sgi.com/projects/FreeB/</a>.
 438         </p></div></div></body></html>