Index for Section 3G

Alphabetical listing for G

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glCopyTexImage1D(3G)
NAME
  glCopyTexImage1D - copy pixels into a 1D texture image

SYNOPSIS
  void glCopyTexImage1D(
	  GLenum target,
	  GLint level,
	  GLenum internalformat,
	  GLint x,
	  GLint y,
	  GLsizei width,
	  GLint border );

PARAMETERS
  target
      Specifies the target texture. Must be GL_TEXTURE_1D.

  level
      Specifies the level-of-detail number. Level 0 is the base image level.
      Level n is the nth mipmap reduction image.

  internalformat
      Specifies the internal  of the texture. Must be one of the following
      symbolic 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.

  x, y
      Specify the window coordinates of the left corner of the row of pixels
      to be copied.

  width
      Specifies the width of the texture image. Must be 0 or 2^n + 2*border
      for some integer n. The height of the texture image is 1.

  border
      Specifies the width of the border. Must be either 0 or 1.

DESCRIPTION
  glCopyTexImage1D() defines a one-dimensional texture image with pixels from
  the current GL_READ_BUFFER.

  The screen-aligned pixel row with left corner at (x, y) and with a length
  of width+2*border defines the texture array at the mipmap level specified
  by level.  internalformat specifies the internal  of the texture array.

  The pixels in the row are processed exactly as if glCopyPixels() had been
  called, but the process stops just before final conversion.  At this point
  all pixel component values are clamped to the range [0, 1] and then
  converted to the texture's internal  for storage in the texel array.

  Pixel ordering is such that lower x screen coordinates correspond to lower
  texture coordinates.

  If any of the pixels within the specified row of the current GL_READ_BUFFER
  are outside the window associated with the current rendering context, then
  the values obtained for those pixels are undefined.

NOTES
  glCopyTexImage1D() is available only if the GL version is 1.1 or greater.

  Texturing has no effect in color index mode.

  1, 2, 3, and 4 are not accepted values for internalformat.

  An image with 0 width indicates a NULL texture.

  When the GL_ARB_imaging extension is supported, the RGBA components copied
  from the framebuffer may be processed by the imaging pipeline.  See
  glTexImage1D() for specific details.

ERRORS
  GL_INVALID_ENUM is generated if target is not one of the allowable values.

  GL_INVALID_VALUE is generated if level is less than 0.

  GL_INVALID_VALUE may be generated if level is greater than log sub 2 max,
  where max is the returned value of GL_MAX_TEXTURE_SIZE.

  GL_INVALID_VALUE is generated if internalformat is not an allowable value.

  GL_INVALID_VALUE is generated if width is less than 0 or greater than 2 +
  GL_MAX_TEXTURE_SIZE, or if it cannot be represented as 2 sup n +
  2*("border") for some integer value of n.

  GL_INVALID_VALUE is generated if border is not 0 or 1.

  GL_INVALID_OPERATION is generated if glCopyTexImage1D is executed between
  the execution of glBegin and the corresponding execution of glEnd.

ASSOCIATED GETS
       glGetTexImage()
       glIsEnabled() with argument GL_TEXTURE_1D

SEE ALSO
  glCopyPixels(3), glCopyTexImage2D(3), glCopyTexSubImage1D(3),
  glCopyTexSubImage2D(3), glPixelStore(3), glPixelTransfer(3), glTexEnv(3),
  glTexGen(3), glTexImage1D(3), glTexImage2D(3), glTexSubImage1D(3),
  glTexSubImage2D(3), glTexParameter(3)

Index for Section 3G

Alphabetical listing for G

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