glPixelMapusv man page on Solaris

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GLPIXELMAP(3gl)						       GLPIXELMAP(3gl)

NAME
       glPixelMapfv, glPixelMapuiv, glPixelMapusv - set up pixel transfer maps

C SPECIFICATION
       void glPixelMapfv( GLenum map,
			  GLsizei mapsize,
			  const GLfloat *values )
       void glPixelMapuiv( GLenum map,
			   GLsizei mapsize,
			   const GLuint *values )
       void glPixelMapusv( GLenum map,
			   GLsizei mapsize,
			   const GLushort *values )

PARAMETERS
       map	Specifies a symbolic map name.	Must be one of the following:
		GL_PIXEL_MAP_I_TO_I, GL_PIXEL_MAP_S_TO_S, GL_PIXEL_MAP_I_TO_R,
		GL_PIXEL_MAP_I_TO_G, GL_PIXEL_MAP_I_TO_B, GL_PIXEL_MAP_I_TO_A,
		GL_PIXEL_MAP_R_TO_R, GL_PIXEL_MAP_G_TO_G, GL_PIXEL_MAP_B_TO_B,
		or GL_PIXEL_MAP_A_TO_A.

       mapsize	Specifies the size of the map being defined.

       values	Specifies an array of mapsize values.

DESCRIPTION
       glPixelMap sets up translation tables, or maps, used by glCopyPixels,
       glCopyTexImage1D, glCopyTexImage2D, glCopyTexSubImage1D, glCopyTex‐
       SubImage2D, glDrawPixels, glReadPixels, glTexImage1D, glTexImage2D,
       glTexSubImage1D, and glTexSubImage2D.  Use of these maps is described
       completely in the glPixelTransfer reference page, and partly in the
       reference pages for the pixel and texture image commands.  Only the
       specification of the maps is described in this reference page.

       map is a symbolic map name, indicating one of ten maps to set.  mapsize
       specifies the number of entries in the map, and values is a pointer to
       an array of mapsize map values.

       The ten maps are as follows:

       GL_PIXEL_MAP_I_TO_I	     Maps color indices to color indices.

       GL_PIXEL_MAP_S_TO_S	     Maps stencil indices to stencil indices.

       GL_PIXEL_MAP_I_TO_R	     Maps color indices to red components.

       GL_PIXEL_MAP_I_TO_G	     Maps color indices to green components.

       GL_PIXEL_MAP_I_TO_B	     Maps color indices to blue components.

       GL_PIXEL_MAP_I_TO_A	     Maps color indices to alpha components.

       GL_PIXEL_MAP_R_TO_R	     Maps red components to red components.

       GL_PIXEL_MAP_G_TO_G	     Maps green components to green compo‐
				     nents.

       GL_PIXEL_MAP_B_TO_B	     Maps blue components to blue components.

       GL_PIXEL_MAP_A_TO_A	     Maps alpha components to alpha compo‐
				     nents.

       The entries in a map can be specified as single-precision floating-
       point numbers, unsigned short integers, or unsigned long integers.
       Maps that store color component values (all but GL_PIXEL_MAP_I_TO_I and
       GL_PIXEL_MAP_S_TO_S) retain their values in floating-point format, with
       unspecified mantissa and exponent sizes.	 Floating-point values speci‐
       fied by glPixelMapfv are converted directly to the internal floating-
       point format of these maps, then clamped to the range [0,1].  Unsigned
       integer values specified by glPixelMapusv and glPixelMapuiv are con‐
       verted linearly such that the largest representable integer maps to
       1.0, and 0 maps to 0.0.

       Maps that store indices, GL_PIXEL_MAP_I_TO_I and GL_PIXEL_MAP_S_TO_S,
       retain their values in fixed-point format, with an unspecified number
       of bits to the right of the binary point.  Floating-point values speci‐
       fied by glPixelMapfv are converted directly to the internal fixed-point
       format of these maps.  Unsigned integer values specified by glPixelMa‐
       pusv and glPixelMapuiv specify integer values, with all 0's to the
       right of the binary point.

       The following table shows the initial sizes and values for each of the
       maps.  Maps that are indexed by either color or stencil indices must
       have mapsize = 2n for some n or the results are undefined.  The maximum
       allowable size for each map depends on the implementation and can be
       determined by calling glGet with argument GL_MAX_PIXEL_MAP_TABLE.  The
       single maximum applies to all maps; it is at least 32.

┌────────────────────┬────────────────┬────────────────┬──────────────┬───────────────┐
│	 map	     │	lookup index  │	 lookup value  │ initial size │ initial value │
├────────────────────┼────────────────┼────────────────┼──────────────┼───────────────┤
│GL_PIXEL_MAP_I_TO_I │	color index   │	 color index   │      1	      │	      0	      │
│GL_PIXEL_MAP_S_TO_S │ stencil index  │ stencil index  │      1	      │	      0	      │
│GL_PIXEL_MAP_I_TO_R │	color index   │	      R	       │      1	      │	      0	      │
│GL_PIXEL_MAP_I_TO_G │	color index   │	      G	       │      1	      │	      0	      │
│GL_PIXEL_MAP_I_TO_B │	color index   │	      B	       │      1	      │	      0	      │
│GL_PIXEL_MAP_I_TO_A │	color index   │	      A	       │      1	      │	      0	      │
│GL_PIXEL_MAP_R_TO_R │	     R	      │	      R	       │      1	      │	      0	      │
│GL_PIXEL_MAP_G_TO_G │	     G	      │	      G	       │      1	      │	      0	      │
│GL_PIXEL_MAP_B_TO_B │	     B	      │	      B	       │      1	      │	      0	      │
│GL_PIXEL_MAP_A_TO_A │	     A	      │	      A	       │      1	      │	      0	      │
└────────────────────┴────────────────┴────────────────┴──────────────┴───────────────┘
ERRORS
       GL_INVALID_ENUM is generated if map is not an accepted value.

       GL_INVALID_VALUE is generated if mapsize is less than one or larger
       than GL_MAX_PIXEL_MAP_TABLE.

       GL_INVALID_VALUE is generated if map is GL_PIXEL_MAP_I_TO_I,
       GL_PIXEL_MAP_S_TO_S, GL_PIXEL_MAP_I_TO_R, GL_PIXEL_MAP_I_TO_G,
       GL_PIXEL_MAP_I_TO_B, or GL_PIXEL_MAP_I_TO_A, and mapsize is not a power
       of two.

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

ASSOCIATED GETS
       glGetPixelMap
       glGet with argument GL_PIXEL_MAP_I_TO_I_SIZE
       glGet with argument GL_PIXEL_MAP_S_TO_S_SIZE
       glGet with argument GL_PIXEL_MAP_I_TO_R_SIZE
       glGet with argument GL_PIXEL_MAP_I_TO_G_SIZE
       glGet with argument GL_PIXEL_MAP_I_TO_B_SIZE
       glGet with argument GL_PIXEL_MAP_I_TO_A_SIZE
       glGet with argument GL_PIXEL_MAP_R_TO_R_SIZE
       glGet with argument GL_PIXEL_MAP_G_TO_G_SIZE
       glGet with argument GL_PIXEL_MAP_B_TO_B_SIZE
       glGet with argument GL_PIXEL_MAP_A_TO_A_SIZE
       glGet with argument GL_MAX_PIXEL_MAP_TABLE

SEE ALSO
       glCopyPixels, glCopyTexImage1D, glCopyTexImage2D, glCopyTexSubImage1D,
       glCopyTexSubImage2D, glDrawPixels, glPixelStore, glPixelTransfer,
       glReadPixels, glTexImage1D, glTexImage2D, glTexSubImage1D, glTexSubIm‐
       age2D

				   15 Mar 97		       GLPIXELMAP(3gl)
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