glGetMinmax man page on YellowDog

Man page or keyword search:  
man Server   18644 pages
apropos Keyword Search (all sections)
Output format
YellowDog logo
[printable version]

GLGETMINMAX(3G)						       GLGETMINMAX(3G)

NAME
       glGetMinmax - get minimum and maximum pixel values

C SPECIFICATION
       void glGetMinmax( GLenum target,
			 GLboolean reset,
			 GLenum format,
			 GLenum types,
			 GLvoid *values )

PARAMETERS
       target  Must be GL_MINMAX.

       reset   If  GL_TRUE,  all entries in the minmax table that are actually
	       returned are reset to their initial values.  (Other entries are
	       unaltered.)  If GL_FALSE, the minmax table is unaltered.

       format  The   of	 the  data  to	be returned in values.	Must be one of
	       GL_RED, GL_GREEN, GL_BLUE, GL_ALPHA, GL_RGB,  GL_BGR,  GL_RGBA,
	       GL_BGRA, GL_LUMINANCE, or GL_LUMINANCE_ALPHA.

       types   The  type  of the data to be returned in values.	 Symbolic con‐
	       stants 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,  and GL_UNSIGNED_INT_2_10_10_10_REV
	       are accepted.

       values  A pointer to storage for the returned values.

DESCRIPTION
       glGetMinmax returns the accumulated minimum and	maximum	 pixel	values
       (computed on a per-component basis) in a one-dimensional image of width
       2.  The first set of return values are the minima, and the  second  set
       of  return  values are the maxima.  The	of the return values is deter‐
       mined by format, and their type is determined by types.

       No pixel transfer operations are performed on the  return  values,  but
       pixel  storage  modes  that  are applicable to 1-dimensional images are
       performed.  Color components that are requested in the  specified  for‐
       mat,  but  that	are not included in the internal  of the minmax table,
       are returned as zero.  The assignment of internal color	components  to
       the components requested by format are as follows:

		      ─────────────────────────────────────────
		      Internal Component   Resulting Component
		      ─────────────────────────────────────────
		      Red		   Red
		      Green		   Green
		      Blue		   Blue
		      Alpha		   Alpha
		      Luminance		   Red
		      ─────────────────────────────────────────

       If  reset  is  GL_TRUE,	the  minmax table entries corresponding to the
       return values are reset to their initial values.	 Minimum  and  maximum
       values  that  are  not  returned	 are  not  modified,  even if reset is
       GL_TRUE.

NOTES
       glGetMinmax  is	present	 only  if  GL_ARB_imaging  is  returned	  when
       glGetString is called with an argument of GL_EXTENSIONS.

ERRORS
       GL_INVALID_ENUM is generated if target is not GL_MINMAX.

       GL_INVALID_ENUM is generated if format is not one of the allowable val‐
       ues.

       GL_INVALID_ENUM is generated if types is not one of the allowable  val‐
       ues.

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

       GL_INVALID_OPERATION   is   generated	if    types    is    one    of
       GL_UNSIGNED_BYTE_3_3_2,			   GL_UNSIGNED_BYTE_2_3_3_REV,
       GL_UNSIGNED_SHORT_5_6_5, or GL_UNSIGNED_SHORT_5_6_5_REV and  format  is
       not GL_RGB.

       GL_INVALID_OPERATION    is    generated	  if	types	 is   one   of
       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 and for‐
       mat is neither GL_RGBA nor GL_BGRA.

SEE ALSO
       glMinmax(3G), glResetMinmax(3G), glGetMinmaxParameter(3G)

							       GLGETMINMAX(3G)
[top]

List of man pages available for YellowDog

Copyright (c) for man pages and the logo by the respective OS vendor.

For those who want to learn more, the polarhome community provides shell access and support.

[legal] [privacy] [GNU] [policy] [cookies] [netiquette] [sponsors] [FAQ]
Tweet
Polarhome, production since 1999.
Member of Polarhome portal.
Based on Fawad Halim's script.
....................................................................
Vote for polarhome
Free Shell Accounts :: the biggest list on the net