455 строки
10 KiB
C
455 строки
10 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:
|
|
*
|
|
* The code for depths like 24 that don't have integer number of pixels per
|
|
* long is broken and needs to be fixed. For now I turned these types of
|
|
* mode off.
|
|
*
|
|
* 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/config.h>
|
|
#include <linux/module.h>
|
|
#include <linux/string.h>
|
|
#include <linux/fb.h>
|
|
#include <asm/types.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
|
|
|
|
/*
|
|
* Compose two values, using a bitmask as decision value
|
|
* This is equivalent to (a & mask) | (b & ~mask)
|
|
*/
|
|
|
|
static inline unsigned long
|
|
comp(unsigned long a, unsigned long b, unsigned long mask)
|
|
{
|
|
return ((a ^ b) & mask) ^ b;
|
|
}
|
|
|
|
/*
|
|
* Create a pattern with the given pixel's color
|
|
*/
|
|
|
|
#if BITS_PER_LONG == 64
|
|
static inline unsigned long
|
|
pixel_to_pat( u32 bpp, u32 pixel)
|
|
{
|
|
switch (bpp) {
|
|
case 1:
|
|
return 0xfffffffffffffffful*pixel;
|
|
case 2:
|
|
return 0x5555555555555555ul*pixel;
|
|
case 4:
|
|
return 0x1111111111111111ul*pixel;
|
|
case 8:
|
|
return 0x0101010101010101ul*pixel;
|
|
case 12:
|
|
return 0x0001001001001001ul*pixel;
|
|
case 16:
|
|
return 0x0001000100010001ul*pixel;
|
|
case 24:
|
|
return 0x0000000001000001ul*pixel;
|
|
case 32:
|
|
return 0x0000000100000001ul*pixel;
|
|
default:
|
|
panic("pixel_to_pat(): unsupported pixelformat\n");
|
|
}
|
|
}
|
|
#else
|
|
static inline unsigned long
|
|
pixel_to_pat( u32 bpp, u32 pixel)
|
|
{
|
|
switch (bpp) {
|
|
case 1:
|
|
return 0xfffffffful*pixel;
|
|
case 2:
|
|
return 0x55555555ul*pixel;
|
|
case 4:
|
|
return 0x11111111ul*pixel;
|
|
case 8:
|
|
return 0x01010101ul*pixel;
|
|
case 12:
|
|
return 0x00001001ul*pixel;
|
|
case 16:
|
|
return 0x00010001ul*pixel;
|
|
case 24:
|
|
return 0x00000001ul*pixel;
|
|
case 32:
|
|
return 0x00000001ul*pixel;
|
|
default:
|
|
panic("pixel_to_pat(): unsupported pixelformat\n");
|
|
}
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Aligned pattern fill using 32/64-bit memory accesses
|
|
*/
|
|
|
|
static void
|
|
bitfill_aligned(unsigned long __iomem *dst, int dst_idx, unsigned long pat, unsigned n, int bits)
|
|
{
|
|
unsigned long first, last;
|
|
|
|
if (!n)
|
|
return;
|
|
|
|
first = ~0UL >> dst_idx;
|
|
last = ~(~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!= ~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(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 = ~0UL >> dst_idx;
|
|
last = ~(~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), first), dst);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Aligned pattern invert using 32/64-bit memory accesses
|
|
*/
|
|
static void
|
|
bitfill_aligned_rev(unsigned long __iomem *dst, int dst_idx, unsigned long pat, unsigned n, int bits)
|
|
{
|
|
unsigned long val = pat, dat;
|
|
unsigned long first, last;
|
|
|
|
if (!n)
|
|
return;
|
|
|
|
first = ~0UL >> dst_idx;
|
|
last = ~(~0UL >> ((dst_idx+n) % bits));
|
|
|
|
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(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 = ~0UL >> dst_idx;
|
|
last = ~(~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 x2, y2, vxres, vyres, height, width, pat, fg;
|
|
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;
|
|
|
|
/* We want rotation but lack hardware to do it for us. */
|
|
if (!p->fbops->fb_rotate && p->var.rotate) {
|
|
}
|
|
|
|
vxres = p->var.xres_virtual;
|
|
vyres = p->var.yres_virtual;
|
|
|
|
if (!rect->width || !rect->height ||
|
|
rect->dx > vxres || rect->dy > vyres)
|
|
return;
|
|
|
|
/* We could use hardware clipping but on many cards you get around
|
|
* hardware clipping by writing to framebuffer directly. */
|
|
|
|
x2 = rect->dx + rect->width;
|
|
y2 = rect->dy + rect->height;
|
|
x2 = x2 < vxres ? x2 : vxres;
|
|
y2 = y2 < vyres ? y2 : vyres;
|
|
width = x2 - rect->dx;
|
|
height = y2 - rect->dy;
|
|
|
|
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) {
|
|
void (*fill_op32)(unsigned long __iomem *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(dst, dst_idx, pat, width*bpp, bits);
|
|
dst_idx += p->fix.line_length*8;
|
|
}
|
|
} else {
|
|
int right;
|
|
int r;
|
|
int rot = (left-dst_idx) % bpp;
|
|
void (*fill_op)(unsigned long __iomem *dst, int dst_idx,
|
|
unsigned long pat, int left, int right,
|
|
unsigned n, int bits) = NULL;
|
|
|
|
/* rotate pattern to correct start position */
|
|
pat = pat << rot | pat >> (bpp-rot);
|
|
|
|
right = bpp-left;
|
|
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 >> (ffs(bits) - 1);
|
|
dst_idx &= (bits - 1);
|
|
fill_op(dst, dst_idx, pat, left, right,
|
|
width*bpp, bits);
|
|
r = (p->fix.line_length*8) % bpp;
|
|
pat = pat << (bpp-r) | pat >> r;
|
|
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");
|