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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374757677/* * linux/drivers/video/console/softcursor.c * * Generic software cursor for frame buffer devices * * Created 14 Nov 2002 by James Simmons * * 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/module.h>#include <linux/string.h>#include <linux/fb.h>#include <linux/slab.h>
#include <asm/io.h>
#include "fbcon.h"
int soft_cursor(struct fb_info *info, struct fb_cursor *cursor){ struct fbcon_par *par = info->fbcon_par; unsigned int scan_align = info->pixmap.scan_align - 1; unsigned int buf_align = info->pixmap.buf_align - 1; unsigned int i, size, dsize, s_pitch, d_pitch; struct fb_image *image; u8 *src, *dst;
if (info->state != FBINFO_STATE_RUNNING) return 0;
s_pitch = (cursor->image.width + 7) >> 3; dsize = s_pitch * cursor->image.height;
if (dsize + sizeof(struct fb_image) != par->cursor_size) { kfree(par->cursor_src); par->cursor_size = dsize + sizeof(struct fb_image);
par->cursor_src = kmalloc(par->cursor_size, GFP_ATOMIC); if (!par->cursor_src) { par->cursor_size = 0; return -ENOMEM; } }
src = par->cursor_src + sizeof(struct fb_image); image = (struct fb_image *)par->cursor_src; *image = cursor->image; d_pitch = (s_pitch + scan_align) & ~scan_align;
size = d_pitch * image->height + buf_align; size &= ~buf_align; dst = fb_get_buffer_offset(info, &info->pixmap, size);
if (cursor->enable) { switch (cursor->rop) { case ROP_XOR: for (i = 0; i < dsize; i++) src[i] = image->data[i] ^ cursor->mask[i]; break; case ROP_COPY: default: for (i = 0; i < dsize; i++) src[i] = image->data[i] & cursor->mask[i]; break; } } else memcpy(src, image->data, dsize);
fb_pad_aligned_buffer(dst, d_pitch, src, s_pitch, image->height); image->data = dst; info->fbops->fb_imageblit(info, image); return 0;}