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init_colormap_handle(9r)
NAME
  init_colormap_handle - Graphics: Initializes the handle to the colormap
  functions

SYNOPSIS
  caddr_t init_colormap_handle(
	  caddr_t colormap_handle,
	  caddr_t address,
	  int unit,
	  int type );

ARGUMENTS
  colormap_handle
      Specifies the virtual address (handle) of device-specific information.
      Typically this is a pointer to a private data structure that may
      contain information such as the address of the hardware, state
      information, and other information that may be shared between drivers.
      The Workstation Subsystem allows separate handles for the cursor,
      colormap, and the screen functions.

  address
      Specifies the virtual address of the colormap_handle argument.

  unit
      Specifies the unit number of the controller that the graphics card is
      attached to.

  type
      Specifies the type of graphics card.

DESCRIPTION
  The init_colormap_handle function initializes the colormap_handle argument
  for each graphics device driver.

RETURN VALUES
  On success, the init_colormap_handle function returns a pointer to a
  colormap handle. This pointer is NULL if an error occurs.

EXAMPLES
  The following code is from the Compaq implementation of
  init_colormap_handle in the myvga example driver:

       caddr_t
       myvga_init_color_map_handle (caddr_t colormap_handle,
				    caddr_t address,
				    int unit,
				    int type)
       {
	   struct myvga_type *scp =
		      ((struct myvga_type **)colormap_handle)[unit];

	   if (myvga_developer_debug)
	       printf("myvga_color_map_init_colormap_handle: entry\n");

	   return (caddr_t)scp ;
       }

FILES
  /usr/sys/include/sys/workstation.h

  /usr/sys/include/sys/wsdevice.h

SEE ALSO
  Data Structures: ws_color_map_functions(9s)

Index for Section 9

Alphabetical listing for I

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