linux/drivers/video/fbdev/core/fbcmap.c

/*
 *  linux/drivers/video/fbcmap.c -- Colormap handling for frame buffer devices
 *
 *	Created 15 Jun 1997 by Geert Uytterhoeven
 *
 *	2001 - Documented with DocBook
 *	- Brad Douglas <[email protected]>
 *
 *  This file is subject to the terms and conditions of the GNU General Public
 *  License.  See the file COPYING in the main directory of this archive for
 *  more details.
 */

#include <linux/string.h>
#include <linux/module.h>
#include <linux/fb.h>
#include <linux/slab.h>
#include <linux/uaccess.h>

static u16 red2[] __read_mostly = …;
static u16 green2[] __read_mostly = …;
static u16 blue2[] __read_mostly = …;

static u16 red4[] __read_mostly = …;
static u16 green4[] __read_mostly = …;
static u16 blue4[] __read_mostly = …;

static u16 red8[] __read_mostly = …;
static u16 green8[] __read_mostly = …;
static u16 blue8[] __read_mostly = …;

static u16 red16[] __read_mostly = …;
static u16 green16[] __read_mostly = …;
static u16 blue16[] __read_mostly = …;

static const struct fb_cmap default_2_colors = …;
static const struct fb_cmap default_8_colors = …;
static const struct fb_cmap default_4_colors = …;
static const struct fb_cmap default_16_colors = …;



/**
 *	fb_alloc_cmap_gfp - allocate a colormap
 *	@cmap: frame buffer colormap structure
 *	@len: length of @cmap
 *	@transp: boolean, 1 if there is transparency, 0 otherwise
 *	@flags: flags for kmalloc memory allocation
 *
 *	Allocates memory for a colormap @cmap.  @len is the
 *	number of entries in the palette.
 *
 *	Returns negative errno on error, or zero on success.
 *
 */

int fb_alloc_cmap_gfp(struct fb_cmap *cmap, int len, int transp, gfp_t flags)
{ … }

int fb_alloc_cmap(struct fb_cmap *cmap, int len, int transp)
{ … }

/**
 *      fb_dealloc_cmap - deallocate a colormap
 *      @cmap: frame buffer colormap structure
 *
 *      Deallocates a colormap that was previously allocated with
 *      fb_alloc_cmap().
 *
 */

void fb_dealloc_cmap(struct fb_cmap *cmap)
{ … }

/**
 *	fb_copy_cmap - copy a colormap
 *	@from: frame buffer colormap structure
 *	@to: frame buffer colormap structure
 *
 *	Copy contents of colormap from @from to @to.
 */

int fb_copy_cmap(const struct fb_cmap *from, struct fb_cmap *to)
{ … }

int fb_cmap_to_user(const struct fb_cmap *from, struct fb_cmap_user *to)
{ … }

/**
 *	fb_set_cmap - set the colormap
 *	@cmap: frame buffer colormap structure
 *	@info: frame buffer info structure
 *
 *	Sets the colormap @cmap for a screen of device @info.
 *
 *	Returns negative errno on error, or zero on success.
 *
 */

int fb_set_cmap(struct fb_cmap *cmap, struct fb_info *info)
{ … }

int fb_set_user_cmap(struct fb_cmap_user *cmap, struct fb_info *info)
{ … }

/**
 *	fb_default_cmap - get default colormap
 *	@len: size of palette for a depth
 *
 *	Gets the default colormap for a specific screen depth.  @len
 *	is the size of the palette for a particular screen depth.
 *
 *	Returns pointer to a frame buffer colormap structure.
 *
 */

const struct fb_cmap *fb_default_cmap(int len)
{ … }


/**
 *	fb_invert_cmaps - invert all defaults colormaps
 *
 *	Invert all default colormaps.
 *
 */

void fb_invert_cmaps(void)
{ … }


    /*
     *  Visible symbols for modules
     */

EXPORT_SYMBOL(…);
EXPORT_SYMBOL(…);
EXPORT_SYMBOL(…);
EXPORT_SYMBOL(…);
EXPORT_SYMBOL(…);
EXPORT_SYMBOL(…);