GLint internalFormat,
GLsizei width,
GLsizei height,
GLsizei depth,
GLenum format,
GLenum type,
const void *data )
PARAMETERS
target Specifies the target texture. Must be GL_TEXTURE_3D.
internalFormat Requests the internal storage format of the texture im‐
age. Must be 1, 2, 3, 4, or one of the following sym‐
bolic constants: GL_ALPHA, GL_ALPHA4, GL_ALPHA8,
GL_ALPHA12, GL_ALPHA16, GL_LUMINANCE, GL_LUMINANCE4,
GL_LUMINANCE8, GL_LUMINANCE12, GL_LUMINANCE16,
GL_LUMINANCE_ALPHA, GL_LUMINANCE4_ALPHA4,
GL_LUMINANCE6_ALPHA2, GL_LUMINANCE8_ALPHA8,
GL_LUMINANCE12_ALPHA4, GL_LUMINANCE12_ALPHA12,
GL_LUMINANCE16_ALPHA16, GL_INTENSITY, GL_INTENSITY4,
GL_INTENSITY8, GL_INTENSITY12, GL_INTENSITY16, GL_RGB,
GL_R3_G3_B2, GL_RGB4, GL_RGB5, GL_RGB8, GL_RGB10,
GL_RGB12, GL_RGB16, GL_RGBA, GL_RGBA2, GL_RGBA4,
GL_RGB5_A1, GL_RGBA8, GL_RGB10_A2, GL_RGBA12, or
GL_RGBA16.
width, height, depth
Specifies in pixels the width, height and depth respec‐
tively, in pixels of the texture image.
format Specifies the format of the pixel data. Must be one of
GL_COLOR_INDEX, GL_DEPTH_COMPONENT, GL_RED, GL_GREEN,
GL_BLUE, GL_ALPHA, GL_RGB, GL_RGBA, GL_BGR, GL_BGRA,
GL_LUMINANCE, or GL_LUMINANCE_ALPHA.
type Specifies the data type for data. Must be one of:
GL_UNSIGNED_BYTE, GL_BYTE, GL_BITMAP, GL_UNSIGNED_SHORT,
GL_SHORT, GL_UNSIGNED_INT, GL_INT, GL_FLOAT,
GL_UNSIGNED_BYTE_3_3_2, GL_UNSIGNED_BYTE_2_3_3_REV,
GL_UNSIGNED_SHORT_5_6_5, GL_UNSIGNED_SHORT_5_6_5_REV,
GL_UNSIGNED_SHORT_4_4_4_4,
GL_UNSIGNED_SHORT_4_4_4_4_REV,
GL_UNSIGNED_SHORT_5_5_5_1,
GL_UNSIGNED_SHORT_1_5_5_5_REV, GL_UNSIGNED_INT_8_8_8_8,
GL_UNSIGNED_INT_8_8_8_8_REV, GL_UNSIGNED_INT_10_10_10_2,
or GL_UNSIGNED_INT_2_10_10_10_REV.
data Specifies a pointer to the image data in memory.
DESCRIPTION
gluBuild3DMipmaps builds a series of prefiltered three-dimensional tex‐
ture maps of decreasing resolutions called a mipmap. This is used for
Then, proxy textures (see glTexImage3D) are used to determine if the im‐
plementation can fit the requested texture. If not, all three dimensions
are continually halved until it fits.
Next, a series of mipmap levels is built by decimating a copy of data in
half along all three dimensions until size 1×1×1 is reached. At each
level, each texel in the halved mipmap level is an average of the corre‐
sponding eight texels in the larger mipmap level. (If exactly one of the
dimensions is 1, four texels are averaged. If exactly two of the dimen‐
sions are 1, two texels are averaged.)
glTexImage3D is called to load each of these mipmap levels. Level 0 is
a copy of data. The highest level is log2(max(width,height,depth)).
For example, if width is 64, height is 16 and depth is 32, and the im‐
plementation can store a texture of this size, the following mipmap lev‐
els are built: 64×16×32, 32×8×16, 16×4×8, 8×2×4, 4×1×2, 2×1×1 and 1×1×1.
These correspond to levels 0 through 6, respectively.
See the glTexImage1D reference page for a description of the acceptable
values for format parameter. See the glDrawPixels reference page for a
description of the acceptable values for type parameter.
NOTES
Note that there is no direct way of querying the maximum level. This can
be derived indirectly via glGetTexLevelParameter. First, query for the
width, height and depth actually used at level 0. (The width, height
and depth may not be equal to width, height and depth respectively since
proxy textures might have scaled them to fit the implementation.) Then
the maximum level can be derived from the formula
log2(max(width,height,depth)).
gluBuild3DMipmaps is only available if the GLU version is 1.3 or
greater.
Formats GL_BGR, and GL_BGRA, and types GL_UNSIGNED_BYTE_3_3_2,
GL_UNSIGNED_BYTE_2_3_3_REV, GL_UNSIGNED_SHORT_5_6_5,
GL_UNSIGNED_SHORT_5_6_5_REV, GL_UNSIGNED_SHORT_4_4_4_4,
GL_UNSIGNED_SHORT_4_4_4_4_REV, GL_UNSIGNED_SHORT_5_5_5_1,
GL_UNSIGNED_SHORT_1_5_5_5_REV, GL_UNSIGNED_INT_8_8_8_8,
GL_UNSIGNED_INT_8_8_8_8_REV, GL_UNSIGNED_INT_10_10_10_2, and
GL_UNSIGNED_INT_2_10_10_10_REV are only available if the GL version is
1.2 or greater.
ERRORS
GLU_INVALID_VALUE is returned if width, height, or depth is < 1.
GLU_INVALID_ENUM is returned if internalFormat, format, or type is not
legal.
GLU_INVALID_OPERATION is returned if type is GL_UNSIGNED_BYTE_3_3_2 or
GL_UNSIGNED_BYTE_2_3_3_REV and format is not GL_RGB.
GLU_INVALID_OPERATION is returned if type is GL_UNSIGNED_INT_10_10_10_2
or GL_UNSIGNED_INT_2_10_10_10_REV and format is neither GL_RGBA nor
GL_BGRA.
SEE ALSO
glDrawPixels, glTexImage1D, glTexImage2D, glTexImage3D,
gluBuild1DMipmaps, gluBuild3DMipmaps, gluErrorString, glGetTexImage,
glGetTexLevelParameter, gluBuild1DMipmapLevels, gluBuild2DMipmapLevels,
gluBuild3DMipmapLevels
GLUBUILD3DMIPMAPS(3G)
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