gluBuild2DMipmaps.3gl

Name

  gluBuild2DMipmaps - create 2-D mipmaps

C Specification

  int gluBuild2DMipmaps( GLenum	target,
			 GLint components,
			 GLint width,
			 GLint height,
			 GLenum	format,
			 GLenum	type,
			 const void *data )

Parameters

  target      Specifies	the target texture.  Must be GL_TEXTURE_2D.

  components  Specifies	the number of color components in the texture.	Must
	      be 1, 2, 3, or 4.

  width, height
	      Specifies	the width and height, respectively, of the texture
	      image.

  format      Specifies	the format of the pixel	data.  Must be one of:
	      GL_COLOR_INDEX, GL_RED, GL_GREEN,	GL_BLUE, GL_ALPHA, GL_RGB,
	      GL_RGBA, GL_LUMINANCE, and 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, or GL_FLOAT.

  data	      Specifies	a pointer to the image data in memory.

Description

  gluBuild2DMipmaps obtains the	input image and	generates all mipmap images
  (using gluScaleImage)	so that	the input image	can be used as a mipmapped
  texture image.  glTexImage2D is then called to load each of the images.  If
  the dimensions of the	input image are	not powers of two, then	the image is
  scaled so that both the width	and height are powers of two before the
  mipmaps are generated.

  A return value of 0 indicates	success. Otherwise, a GLU error	code is
  returned (see	gluErrorString).

  Please refer to the glTexImage1D reference page for a	description of the
  acceptable values for	the format parameter. See the glDrawPixels reference
  page for a description of the	acceptable values for the type parameter.

See Also

  glDrawPixels,	glTexImage1D, glTexImage2D, gluBuild1DMipmaps,
  gluErrorString, gluScaleImage

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Last Edited: Fri Dec 6 11:18:03 EST 1996 by AFV
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