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path: root/drivers/video/fbcmap.c
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Diffstat (limited to 'drivers/video/fbcmap.c')
-rw-r--r--drivers/video/fbcmap.c341
1 files changed, 0 insertions, 341 deletions
diff --git a/drivers/video/fbcmap.c b/drivers/video/fbcmap.c
deleted file mode 100644
index c32a2a50bfa..00000000000
--- a/drivers/video/fbcmap.c
+++ /dev/null
@@ -1,341 +0,0 @@
-/*
- * linux/drivers/video/fbcmap.c -- Colormap handling for frame buffer devices
- *
- * Created 15 Jun 1997 by Geert Uytterhoeven
- *
- * 2001 - Documented with DocBook
- * - Brad Douglas <brad@neruo.com>
- *
- * 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/tty.h>
-#include <linux/fb.h>
-#include <linux/slab.h>
-
-#include <asm/uaccess.h>
-
-static u16 red2[] = {
- 0x0000, 0xaaaa
-};
-static u16 green2[] = {
- 0x0000, 0xaaaa
-};
-static u16 blue2[] = {
- 0x0000, 0xaaaa
-};
-
-static u16 red4[] = {
- 0x0000, 0xaaaa, 0x5555, 0xffff
-};
-static u16 green4[] = {
- 0x0000, 0xaaaa, 0x5555, 0xffff
-};
-static u16 blue4[] = {
- 0x0000, 0xaaaa, 0x5555, 0xffff
-};
-
-static u16 red8[] = {
- 0x0000, 0x0000, 0x0000, 0x0000, 0xaaaa, 0xaaaa, 0xaaaa, 0xaaaa
-};
-static u16 green8[] = {
- 0x0000, 0x0000, 0xaaaa, 0xaaaa, 0x0000, 0x0000, 0x5555, 0xaaaa
-};
-static u16 blue8[] = {
- 0x0000, 0xaaaa, 0x0000, 0xaaaa, 0x0000, 0xaaaa, 0x0000, 0xaaaa
-};
-
-static u16 red16[] = {
- 0x0000, 0x0000, 0x0000, 0x0000, 0xaaaa, 0xaaaa, 0xaaaa, 0xaaaa,
- 0x5555, 0x5555, 0x5555, 0x5555, 0xffff, 0xffff, 0xffff, 0xffff
-};
-static u16 green16[] = {
- 0x0000, 0x0000, 0xaaaa, 0xaaaa, 0x0000, 0x0000, 0x5555, 0xaaaa,
- 0x5555, 0x5555, 0xffff, 0xffff, 0x5555, 0x5555, 0xffff, 0xffff
-};
-static u16 blue16[] = {
- 0x0000, 0xaaaa, 0x0000, 0xaaaa, 0x0000, 0xaaaa, 0x0000, 0xaaaa,
- 0x5555, 0xffff, 0x5555, 0xffff, 0x5555, 0xffff, 0x5555, 0xffff
-};
-
-static struct fb_cmap default_2_colors = {
- 0, 2, red2, green2, blue2, NULL
-};
-static struct fb_cmap default_8_colors = {
- 0, 8, red8, green8, blue8, NULL
-};
-static struct fb_cmap default_4_colors = {
- 0, 4, red4, green4, blue4, NULL
-};
-static struct fb_cmap default_16_colors = {
- 0, 16, red16, green16, blue16, NULL
-};
-
-
-/**
- * fb_alloc_cmap - allocate a colormap
- * @cmap: frame buffer colormap structure
- * @len: length of @cmap
- * @transp: boolean, 1 if there is transparency, 0 otherwise
- *
- * Allocates memory for a colormap @cmap. @len is the
- * number of entries in the palette.
- *
- * Returns -1 errno on error, or zero on success.
- *
- */
-
-int fb_alloc_cmap(struct fb_cmap *cmap, int len, int transp)
-{
- int size = len*sizeof(u16);
-
- if (cmap->len != len) {
- fb_dealloc_cmap(cmap);
- if (!len)
- return 0;
- if (!(cmap->red = kmalloc(size, GFP_ATOMIC)))
- goto fail;
- if (!(cmap->green = kmalloc(size, GFP_ATOMIC)))
- goto fail;
- if (!(cmap->blue = kmalloc(size, GFP_ATOMIC)))
- goto fail;
- if (transp) {
- if (!(cmap->transp = kmalloc(size, GFP_ATOMIC)))
- goto fail;
- } else
- cmap->transp = NULL;
- }
- cmap->start = 0;
- cmap->len = len;
- fb_copy_cmap(fb_default_cmap(len), cmap);
- return 0;
-
-fail:
- fb_dealloc_cmap(cmap);
- return -1;
-}
-
-/**
- * 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)
-{
- kfree(cmap->red);
- kfree(cmap->green);
- kfree(cmap->blue);
- kfree(cmap->transp);
-
- cmap->red = cmap->green = cmap->blue = cmap->transp = NULL;
- cmap->len = 0;
-}
-
-/**
- * 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(struct fb_cmap *from, struct fb_cmap *to)
-{
- int tooff = 0, fromoff = 0;
- int size;
-
- if (to->start > from->start)
- fromoff = to->start - from->start;
- else
- tooff = from->start - to->start;
- size = to->len - tooff;
- if (size > (int) (from->len - fromoff))
- size = from->len - fromoff;
- if (size <= 0)
- return -EINVAL;
- size *= sizeof(u16);
-
- memcpy(to->red+tooff, from->red+fromoff, size);
- memcpy(to->green+tooff, from->green+fromoff, size);
- memcpy(to->blue+tooff, from->blue+fromoff, size);
- if (from->transp && to->transp)
- memcpy(to->transp+tooff, from->transp+fromoff, size);
- return 0;
-}
-
-int fb_cmap_to_user(struct fb_cmap *from, struct fb_cmap_user *to)
-{
- int tooff = 0, fromoff = 0;
- int size;
-
- if (to->start > from->start)
- fromoff = to->start - from->start;
- else
- tooff = from->start - to->start;
- size = to->len - tooff;
- if (size > (int) (from->len - fromoff))
- size = from->len - fromoff;
- if (size <= 0)
- return -EINVAL;
- size *= sizeof(u16);
-
- if (copy_to_user(to->red+tooff, from->red+fromoff, size))
- return -EFAULT;
- if (copy_to_user(to->green+tooff, from->green+fromoff, size))
- return -EFAULT;
- if (copy_to_user(to->blue+tooff, from->blue+fromoff, size))
- return -EFAULT;
- if (from->transp && to->transp)
- if (copy_to_user(to->transp+tooff, from->transp+fromoff, size))
- return -EFAULT;
- return 0;
-}
-
-/**
- * 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 i, start, rc = 0;
- u16 *red, *green, *blue, *transp;
- u_int hred, hgreen, hblue, htransp = 0xffff;
-
- red = cmap->red;
- green = cmap->green;
- blue = cmap->blue;
- transp = cmap->transp;
- start = cmap->start;
-
- if (start < 0 || (!info->fbops->fb_setcolreg &&
- !info->fbops->fb_setcmap))
- return -EINVAL;
- if (info->fbops->fb_setcmap) {
- rc = info->fbops->fb_setcmap(cmap, info);
- } else {
- for (i = 0; i < cmap->len; i++) {
- hred = *red++;
- hgreen = *green++;
- hblue = *blue++;
- if (transp)
- htransp = *transp++;
- if (info->fbops->fb_setcolreg(start++,
- hred, hgreen, hblue,
- htransp, info))
- break;
- }
- }
- if (rc == 0)
- fb_copy_cmap(cmap, &info->cmap);
-
- return rc;
-}
-
-int fb_set_user_cmap(struct fb_cmap_user *cmap, struct fb_info *info)
-{
- int rc, size = cmap->len * sizeof(u16);
- struct fb_cmap umap;
-
- if (cmap->start < 0 || (!info->fbops->fb_setcolreg &&
- !info->fbops->fb_setcmap))
- return -EINVAL;
-
- memset(&umap, 0, sizeof(struct fb_cmap));
- rc = fb_alloc_cmap(&umap, cmap->len, cmap->transp != NULL);
- if (rc)
- return rc;
- if (copy_from_user(umap.red, cmap->red, size) ||
- copy_from_user(umap.green, cmap->green, size) ||
- copy_from_user(umap.blue, cmap->blue, size) ||
- (cmap->transp && copy_from_user(umap.transp, cmap->transp, size))) {
- fb_dealloc_cmap(&umap);
- return -EFAULT;
- }
- umap.start = cmap->start;
- rc = fb_set_cmap(&umap, info);
- fb_dealloc_cmap(&umap);
- return rc;
-}
-
-/**
- * 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.
- *
- */
-
-struct fb_cmap *fb_default_cmap(int len)
-{
- if (len <= 2)
- return &default_2_colors;
- if (len <= 4)
- return &default_4_colors;
- if (len <= 8)
- return &default_8_colors;
- return &default_16_colors;
-}
-
-
-/**
- * fb_invert_cmaps - invert all defaults colormaps
- *
- * Invert all default colormaps.
- *
- */
-
-void fb_invert_cmaps(void)
-{
- u_int i;
-
- for (i = 0; i < 2; i++) {
- red2[i] = ~red2[i];
- green2[i] = ~green2[i];
- blue2[i] = ~blue2[i];
- }
- for (i = 0; i < 4; i++) {
- red4[i] = ~red4[i];
- green4[i] = ~green4[i];
- blue4[i] = ~blue4[i];
- }
- for (i = 0; i < 8; i++) {
- red8[i] = ~red8[i];
- green8[i] = ~green8[i];
- blue8[i] = ~blue8[i];
- }
- for (i = 0; i < 16; i++) {
- red16[i] = ~red16[i];
- green16[i] = ~green16[i];
- blue16[i] = ~blue16[i];
- }
-}
-
-
- /*
- * Visible symbols for modules
- */
-
-EXPORT_SYMBOL(fb_alloc_cmap);
-EXPORT_SYMBOL(fb_dealloc_cmap);
-EXPORT_SYMBOL(fb_copy_cmap);
-EXPORT_SYMBOL(fb_set_cmap);
-EXPORT_SYMBOL(fb_default_cmap);
-EXPORT_SYMBOL(fb_invert_cmaps);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-05 20:01:19 +0000