mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-15 16:53:54 +08:00
bdca0f9b1e
The software fillrect routines do not work properly when the number of pixels per machine word is not an integer. To see that, run the following command on a fbdev console with a 24bpp video mode, using a non-accelerated driver such as (u)vesafb: reset ; echo -e '\e[41mtest\e[K' The expected result is 'test' displayed on a line with red background. Instead of that, 'test' has a red background, but the rest of the line (rendered using fillrect()) contains a distored colorful pattern. This patch fixes the problem by correctly computing rotation shifts. It has been tested in a 24bpp mode on 32- and 64-bit little-endian machines. Signed-off-by: Michal Januszewski <spock@gentoo.org> Acked-by: Krzysztof Helt <krzysztof.h1@wp.pl> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
372 lines
8.7 KiB
C
372 lines
8.7 KiB
C
/*
|
|
* Generic fillrect for frame buffers with packed pixels of any depth.
|
|
*
|
|
* Copyright (C) 2000 James Simmons (jsimmons@linux-fbdev.org)
|
|
*
|
|
* 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.
|
|
*
|
|
* NOTES:
|
|
*
|
|
* Also need to add code to deal with cards endians that are different than
|
|
* the native cpu endians. I also need to deal with MSB position in the word.
|
|
*
|
|
*/
|
|
#include <linux/module.h>
|
|
#include <linux/string.h>
|
|
#include <linux/fb.h>
|
|
#include <asm/types.h>
|
|
#include "fb_draw.h"
|
|
|
|
#if BITS_PER_LONG == 32
|
|
# define FB_WRITEL fb_writel
|
|
# define FB_READL fb_readl
|
|
#else
|
|
# define FB_WRITEL fb_writeq
|
|
# define FB_READL fb_readq
|
|
#endif
|
|
|
|
/*
|
|
* Aligned pattern fill using 32/64-bit memory accesses
|
|
*/
|
|
|
|
static void
|
|
bitfill_aligned(struct fb_info *p, unsigned long __iomem *dst, int dst_idx,
|
|
unsigned long pat, unsigned n, int bits, u32 bswapmask)
|
|
{
|
|
unsigned long first, last;
|
|
|
|
if (!n)
|
|
return;
|
|
|
|
first = fb_shifted_pixels_mask_long(p, dst_idx, bswapmask);
|
|
last = ~fb_shifted_pixels_mask_long(p, (dst_idx+n) % bits, bswapmask);
|
|
|
|
if (dst_idx+n <= bits) {
|
|
// Single word
|
|
if (last)
|
|
first &= last;
|
|
FB_WRITEL(comp(pat, FB_READL(dst), first), dst);
|
|
} else {
|
|
// Multiple destination words
|
|
|
|
// Leading bits
|
|
if (first!= ~0UL) {
|
|
FB_WRITEL(comp(pat, FB_READL(dst), first), dst);
|
|
dst++;
|
|
n -= bits - dst_idx;
|
|
}
|
|
|
|
// Main chunk
|
|
n /= bits;
|
|
while (n >= 8) {
|
|
FB_WRITEL(pat, dst++);
|
|
FB_WRITEL(pat, dst++);
|
|
FB_WRITEL(pat, dst++);
|
|
FB_WRITEL(pat, dst++);
|
|
FB_WRITEL(pat, dst++);
|
|
FB_WRITEL(pat, dst++);
|
|
FB_WRITEL(pat, dst++);
|
|
FB_WRITEL(pat, dst++);
|
|
n -= 8;
|
|
}
|
|
while (n--)
|
|
FB_WRITEL(pat, dst++);
|
|
|
|
// Trailing bits
|
|
if (last)
|
|
FB_WRITEL(comp(pat, FB_READL(dst), last), dst);
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* 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 __iomem *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;
|
|
FB_WRITEL(comp(pat, FB_READL(dst), first), dst);
|
|
} else {
|
|
// Multiple destination words
|
|
// Leading bits
|
|
if (first) {
|
|
FB_WRITEL(comp(pat, FB_READL(dst), first), dst);
|
|
dst++;
|
|
pat = pat << left | pat >> right;
|
|
n -= bits - dst_idx;
|
|
}
|
|
|
|
// Main chunk
|
|
n /= bits;
|
|
while (n >= 4) {
|
|
FB_WRITEL(pat, dst++);
|
|
pat = pat << left | pat >> right;
|
|
FB_WRITEL(pat, dst++);
|
|
pat = pat << left | pat >> right;
|
|
FB_WRITEL(pat, dst++);
|
|
pat = pat << left | pat >> right;
|
|
FB_WRITEL(pat, dst++);
|
|
pat = pat << left | pat >> right;
|
|
n -= 4;
|
|
}
|
|
while (n--) {
|
|
FB_WRITEL(pat, dst++);
|
|
pat = pat << left | pat >> right;
|
|
}
|
|
|
|
// Trailing bits
|
|
if (last)
|
|
FB_WRITEL(comp(pat, FB_READL(dst), last), dst);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Aligned pattern invert using 32/64-bit memory accesses
|
|
*/
|
|
static void
|
|
bitfill_aligned_rev(struct fb_info *p, unsigned long __iomem *dst,
|
|
int dst_idx, unsigned long pat, unsigned n, int bits,
|
|
u32 bswapmask)
|
|
{
|
|
unsigned long val = pat, dat;
|
|
unsigned long first, last;
|
|
|
|
if (!n)
|
|
return;
|
|
|
|
first = fb_shifted_pixels_mask_long(p, dst_idx, bswapmask);
|
|
last = ~fb_shifted_pixels_mask_long(p, (dst_idx+n) % bits, bswapmask);
|
|
|
|
if (dst_idx+n <= bits) {
|
|
// Single word
|
|
if (last)
|
|
first &= last;
|
|
dat = FB_READL(dst);
|
|
FB_WRITEL(comp(dat ^ val, dat, first), dst);
|
|
} else {
|
|
// Multiple destination words
|
|
// Leading bits
|
|
if (first!=0UL) {
|
|
dat = FB_READL(dst);
|
|
FB_WRITEL(comp(dat ^ val, dat, first), dst);
|
|
dst++;
|
|
n -= bits - dst_idx;
|
|
}
|
|
|
|
// Main chunk
|
|
n /= bits;
|
|
while (n >= 8) {
|
|
FB_WRITEL(FB_READL(dst) ^ val, dst);
|
|
dst++;
|
|
FB_WRITEL(FB_READL(dst) ^ val, dst);
|
|
dst++;
|
|
FB_WRITEL(FB_READL(dst) ^ val, dst);
|
|
dst++;
|
|
FB_WRITEL(FB_READL(dst) ^ val, dst);
|
|
dst++;
|
|
FB_WRITEL(FB_READL(dst) ^ val, dst);
|
|
dst++;
|
|
FB_WRITEL(FB_READL(dst) ^ val, dst);
|
|
dst++;
|
|
FB_WRITEL(FB_READL(dst) ^ val, dst);
|
|
dst++;
|
|
FB_WRITEL(FB_READL(dst) ^ val, dst);
|
|
dst++;
|
|
n -= 8;
|
|
}
|
|
while (n--) {
|
|
FB_WRITEL(FB_READL(dst) ^ val, dst);
|
|
dst++;
|
|
}
|
|
// Trailing bits
|
|
if (last) {
|
|
dat = FB_READL(dst);
|
|
FB_WRITEL(comp(dat ^ val, dat, last), dst);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* 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 __iomem *dst,
|
|
int dst_idx, unsigned long pat, int left, int right,
|
|
unsigned n, int bits)
|
|
{
|
|
unsigned long first, last, dat;
|
|
|
|
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;
|
|
dat = FB_READL(dst);
|
|
FB_WRITEL(comp(dat ^ pat, dat, first), dst);
|
|
} else {
|
|
// Multiple destination words
|
|
|
|
// Leading bits
|
|
if (first != 0UL) {
|
|
dat = FB_READL(dst);
|
|
FB_WRITEL(comp(dat ^ pat, dat, first), dst);
|
|
dst++;
|
|
pat = pat << left | pat >> right;
|
|
n -= bits - dst_idx;
|
|
}
|
|
|
|
// Main chunk
|
|
n /= bits;
|
|
while (n >= 4) {
|
|
FB_WRITEL(FB_READL(dst) ^ pat, dst);
|
|
dst++;
|
|
pat = pat << left | pat >> right;
|
|
FB_WRITEL(FB_READL(dst) ^ pat, dst);
|
|
dst++;
|
|
pat = pat << left | pat >> right;
|
|
FB_WRITEL(FB_READL(dst) ^ pat, dst);
|
|
dst++;
|
|
pat = pat << left | pat >> right;
|
|
FB_WRITEL(FB_READL(dst) ^ pat, dst);
|
|
dst++;
|
|
pat = pat << left | pat >> right;
|
|
n -= 4;
|
|
}
|
|
while (n--) {
|
|
FB_WRITEL(FB_READL(dst) ^ pat, dst);
|
|
dst++;
|
|
pat = pat << left | pat >> right;
|
|
}
|
|
|
|
// Trailing bits
|
|
if (last) {
|
|
dat = FB_READL(dst);
|
|
FB_WRITEL(comp(dat ^ pat, dat, last), dst);
|
|
}
|
|
}
|
|
}
|
|
|
|
void cfb_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 __iomem *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 __iomem *)((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) {
|
|
u32 bswapmask = fb_compute_bswapmask(p);
|
|
void (*fill_op32)(struct fb_info *p,
|
|
unsigned long __iomem *dst, int dst_idx,
|
|
unsigned long pat, unsigned n, int bits,
|
|
u32 bswapmask) = 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,
|
|
bswapmask);
|
|
dst_idx += p->fix.line_length*8;
|
|
}
|
|
} else {
|
|
int right, r;
|
|
void (*fill_op)(struct fb_info *p, unsigned long __iomem *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 "cfb_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(cfb_fillrect);
|
|
|
|
MODULE_AUTHOR("James Simmons <jsimmons@users.sf.net>");
|
|
MODULE_DESCRIPTION("Generic software accelerated fill rectangle");
|
|
MODULE_LICENSE("GPL");
|