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/*
* Generic fillrect for frame buffers in system RAM with packed pixels of
* any depth.
*
* Based almost entirely from cfbfillrect.c (which is based almost entirely
* on Geert Uytterhoeven's fillrect routine)
*
* Copyright (C) 2007 Antonino Daplas <adaplas@pol.net>
*
* 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 <asm/types.h>
#include "fb_draw.h"
/*
* Aligned pattern fill using 32/64-bit memory accesses
*/
static void
bitfill_aligned(struct fb_info *p, unsigned long *dst, int dst_idx,
unsigned long pat, unsigned n, int bits)
{
unsigned long first, last;
if (!n)
return;
first = FB_SHIFT_HIGH(p, ~0UL, dst_idx);
last = ~(FB_SHIFT_HIGH(p, ~0UL, (dst_idx+n) % bits));
if (dst_idx+n <= bits) {
/* Single word */
if (last)
first &= last;
*dst = comp(pat, *dst, first);
} else {
/* Multiple destination words */
/* Leading bits */
if (first!= ~0UL) {
*dst = comp(pat, *dst, first);
dst++;
n -= bits - dst_idx;
}
/* Main chunk */
n /= bits;
while (n >= 8) {
*dst++ = pat;
*dst++ = pat;
*dst++ = pat;
*dst++ = pat;
*dst++ = pat;
*dst++ = pat;
*dst++ = pat;
*dst++ = pat;
n -= 8;
}
while (n--)
*dst++ = pat;
/* Trailing bits */
if (last)
*dst = comp(pat, *dst, last);
}
}
/*
* Unaligned generic pattern fill using 32/64-bit memory accesses
* The pattern must have been expanded to a full 32/64-bit value
* Left/right are the appropriate shifts to convert to the pattern to be
* used for the next 32/64-bit word
*/
static void
bitfill_unaligned(struct fb_info *p, unsigned long *dst, int dst_idx,
unsigned long pat, int left, int right, unsigned n, int bits)
{
unsigned long first, last;
if (!n)
return;
first = FB_SHIFT_HIGH(p, ~0UL, dst_idx);
last = ~(FB_SHIFT_HIGH(p, ~0UL, (dst_idx+n) % bits));
if (dst_idx+n <= bits) {
/* Single word */
if (last)
first &= last;
*dst = comp(pat, *dst, first);
} else {
/* Multiple destination words */
/* Leading bits */
if (first) {
*dst = comp(pat, *dst, first);
dst++;
pat = pat << left | pat >> right;
n -= bits - dst_idx;
}
/* Main chunk */
n /= bits;
while (n >= 4) {
*dst++ = pat;
pat = pat << left | pat >> right;
*dst++ = pat;
pat = pat << left | pat >> right;
*dst++ = pat;
pat = pat << left | pat >> right;
*dst++ = pat;
pat = pat << left | pat >> right;
n -= 4;
}
while (n--) {
*dst++ = pat;
pat = pat << left | pat >> right;
}
/* Trailing bits */
if (last)
*dst = comp(pat, *dst, last);
}
}
/*
* Aligned pattern invert using 32/64-bit memory accesses
*/
static void
bitfill_aligned_rev(struct fb_info *p, unsigned long *dst, int dst_idx,
unsigned long pat, unsigned n, int bits)
{
unsigned long val = pat;
unsigned long first, last;
if (!n)
return;
first = FB_SHIFT_HIGH(p, ~0UL, dst_idx);
last = ~(FB_SHIFT_HIGH(p, ~0UL, (dst_idx+n) % bits));
if (dst_idx+n <= bits) {
/* Single word */
if (last)
first &= last;
*dst = comp(*dst ^ val, *dst, first);
} else {
/* Multiple destination words */
/* Leading bits */
if (first!=0UL) {
*dst = comp(*dst ^ val, *dst, first);
dst++;
n -= bits - dst_idx;
}
/* Main chunk */
n /= bits;
while (n >= 8) {
*dst++ ^= val;
*dst++ ^= val;
*dst++ ^= val;
*dst++ ^= val;
*dst++ ^= val;
*dst++ ^= val;
*dst++ ^= val;
*dst++ ^= val;
n -= 8;
}
while (n--)
*dst++ ^= val;
/* Trailing bits */
if (last)
*dst = comp(*dst ^ val, *dst, last);
}
}
/*
* Unaligned generic pattern invert using 32/64-bit memory accesses
* The pattern must have been expanded to a full 32/64-bit value
* Left/right are the appropriate shifts to convert to the pattern to be
* used for the next 32/64-bit word
*/
static void
bitfill_unaligned_rev(struct fb_info *p, unsigned long *dst, int dst_idx,
unsigned long pat, int left, int right, unsigned n,
int bits)
{
unsigned long first, last;
if (!n)
return;
first = FB_SHIFT_HIGH(p, ~0UL, dst_idx);
last = ~(FB_SHIFT_HIGH(p, ~0UL, (dst_idx+n) % bits));
if (dst_idx+n <= bits) {
/* Single word */
if (last)
first &= last;
*dst = comp(*dst ^ pat, *dst, first);
} else {
/* Multiple destination words */
/* Leading bits */
if (first != 0UL) {
*dst = comp(*dst ^ pat, *dst, first);
dst++;
pat = pat << left | pat >> right;
n -= bits - dst_idx;
}
/* Main chunk */
n /= bits;
while (n >= 4) {
*dst++ ^= pat;
pat = pat << left | pat >> right;
*dst++ ^= pat;
pat = pat << left | pat >> right;
*dst++ ^= pat;
pat = pat << left | pat >> right;
*dst++ ^= pat;
pat = pat << left | pat >> right;
n -= 4;
}
while (n--) {
*dst ^= pat;
pat = pat << left | pat >> right;
}
/* Trailing bits */
if (last)
*dst = comp(*dst ^ pat, *dst, last);
}
}
void sys_fillrect(struct fb_info *p, const struct fb_fillrect *rect)
{
unsigned long pat, pat2, fg;
unsigned long width = rect->width, height = rect->height;
int bits = BITS_PER_LONG, bytes = bits >> 3;
u32 bpp = p->var.bits_per_pixel;
unsigned long *dst;
int dst_idx, left;
if (p->state != FBINFO_STATE_RUNNING)
return;
if (p->fix.visual == FB_VISUAL_TRUECOLOR ||
p->fix.visual == FB_VISUAL_DIRECTCOLOR )
fg = ((u32 *) (p->pseudo_palette))[rect->color];
else
fg = rect->color;
pat = pixel_to_pat( bpp, fg);
dst = (unsigned long *)((unsigned long)p->screen_base & ~(bytes-1));
dst_idx = ((unsigned long)p->screen_base & (bytes - 1))*8;
dst_idx += rect->dy*p->fix.line_length*8+rect->dx*bpp;
/* FIXME For now we support 1-32 bpp only */
left = bits % bpp;
if (p->fbops->fb_sync)
p->fbops->fb_sync(p);
if (!left) {
void (*fill_op32)(struct fb_info *p, unsigned long *dst,
int dst_idx, unsigned long pat, unsigned n,
int bits) = NULL;
switch (rect->rop) {
case ROP_XOR:
fill_op32 = bitfill_aligned_rev;
break;
case ROP_COPY:
fill_op32 = bitfill_aligned;
break;
default:
printk( KERN_ERR "cfb_fillrect(): unknown rop, "
"defaulting to ROP_COPY\n");
fill_op32 = bitfill_aligned;
break;
}
while (height--) {
dst += dst_idx >> (ffs(bits) - 1);
dst_idx &= (bits - 1);
fill_op32(p, dst, dst_idx, pat, width*bpp, bits);
dst_idx += p->fix.line_length*8;
}
} else {
int right, r;
void (*fill_op)(struct fb_info *p, unsigned long *dst,
int dst_idx, unsigned long pat, int left,
int right, unsigned n, int bits) = NULL;
#ifdef __LITTLE_ENDIAN
right = left;
left = bpp - right;
#else
right = bpp - left;
#endif
switch (rect->rop) {
case ROP_XOR:
fill_op = bitfill_unaligned_rev;
break;
case ROP_COPY:
fill_op = bitfill_unaligned;
break;
default:
printk(KERN_ERR "sys_fillrect(): unknown rop, "
"defaulting to ROP_COPY\n");
fill_op = bitfill_unaligned;
break;
}
while (height--) {
dst += dst_idx / bits;
dst_idx &= (bits - 1);
r = dst_idx % bpp;
/* rotate pattern to the correct start position */
pat2 = le_long_to_cpu(rolx(cpu_to_le_long(pat), r, bpp));
fill_op(p, dst, dst_idx, pat2, left, right,
width*bpp, bits);
dst_idx += p->fix.line_length*8;
}
}
}
EXPORT_SYMBOL(sys_fillrect);
MODULE_AUTHOR("Antonino Daplas <adaplas@pol.net>");
MODULE_DESCRIPTION("Generic fill rectangle (sys-to-sys)");
MODULE_LICENSE("GPL");
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