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/*
* 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/string.h>
#include <linux/fb.h>
#include <asm/types.h>
#include <video/fbcon.h>
void cfb_fillrect(struct fb_info *p, struct fb_fillrect *rect)
{
unsigned long start_index, end_index, start_mask = 0, end_mask = 0;
unsigned long height, ppw, fg, fgcolor;
int i, n, x2, y2, linesize = p->fix.line_length;
int bpl = sizeof(unsigned long);
unsigned long *dst;
char *dst1;
if (!rect->width || !rect->height)
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 < p->var.xres_virtual ? x2 : p->var.xres_virtual;
y2 = y2 < p->var.yres_virtual ? y2 : p->var.yres_virtual;
rect->width = x2 - rect->dx;
height = y2 - rect->dy;
/* Size of the scanline in bytes */
n = (rect->width * (p->var.bits_per_pixel >> 3));
ppw = BITS_PER_LONG / p->var.bits_per_pixel;
dst1 = p->screen_base + (rect->dy * linesize) +
(rect->dx * (p->var.bits_per_pixel >> 3));
start_index = ((unsigned long) dst1 & (bpl - 1));
end_index = ((unsigned long) (dst1 + n) & (bpl - 1));
if (p->fix.visual == FB_VISUAL_TRUECOLOR)
fg = fgcolor = ((u32 *) (p->pseudo_palette))[rect->color];
else
fg = fgcolor = rect->color;
for (i = 0; i < ppw - 1; i++) {
fg <<= p->var.bits_per_pixel;
fg |= fgcolor;
}
if (start_index) {
start_mask = fg << (start_index << 3);
n -= (bpl - start_index);
}
if (end_index) {
end_mask = fg >> ((bpl - end_index) << 3);
n -= end_index;
}
n = n / bpl;
if (n <= 0) {
if (start_mask) {
if (end_mask)
end_mask &= start_mask;
else
end_mask = start_mask;
start_mask = 0;
}
n = 0;
}
if ((BITS_PER_LONG % p->var.bits_per_pixel) == 0) {
switch (rect->rop) {
case ROP_COPY:
do {
/* Word align to increases performace :-) */
dst = (unsigned long *) (dst1 - start_index);
if (start_mask) {
#if BITS_PER_LONG == 32
fb_writel(fb_readl(dst) |
start_mask, dst);
#else
fb_writeq(fb_readq(dst) |
start_mask, dst);
#endif
dst++;
}
for (i = 0; i < n; i++) {
#if BITS_PER_LONG == 32
fb_writel(fg, dst);
#else
fb_writeq(fg, dst);
#endif
dst++;
}
if (end_mask)
#if BITS_PER_LONG == 32
fb_writel(fb_readl(dst) | end_mask,
dst);
#else
fb_writeq(fb_readq(dst) | end_mask,
dst);
#endif
dst1 += linesize;
} while (--height);
break;
case ROP_XOR:
do {
dst = (unsigned long *) (dst1 - start_index);
if (start_mask) {
#if BITS_PER_LONG == 32
fb_writel(fb_readl(dst) ^
start_mask, dst);
#else
fb_writeq(fb_readq(dst) ^
start_mask, dst);
#endif
dst++;
}
for (i = 0; i < n; i++) {
#if BITS_PER_LONG == 32
fb_writel(fb_readl(dst) ^ fg, dst);
#else
fb_writeq(fb_readq(dst) ^ fg, dst);
#endif
dst++;
}
if (end_mask) {
#if BITS_PER_LONG == 32
fb_writel(fb_readl(dst) ^ end_mask,
dst);
#else
fb_writeq(fb_readq(dst) ^ end_mask,
dst);
#endif
}
dst1 += linesize;
} while (--height);
break;
}
} else {
/* Odd modes like 24 or 80 bits per pixel */
start_mask = fg >> (start_index * p->var.bits_per_pixel);
end_mask = fg << (end_index * p->var.bits_per_pixel);
/* start_mask =& PFILL24(x1,fg);
end_mask_or = end_mask & PFILL24(x1+width-1,fg); */
n = (rect->width - start_index - end_index) / ppw;
switch (rect->rop) {
case ROP_COPY:
do {
dst = (unsigned long *) dst1;
if (start_mask)
*dst |= start_mask;
if ((start_index + rect->width) > ppw)
dst++;
/* XXX: slow */
for (i = 0; i < n; i++) {
*dst++ = fg;
}
if (end_mask)
*dst |= end_mask;
dst1 += linesize;
} while (--height);
break;
case ROP_XOR:
do {
dst = (unsigned long *) dst1;
if (start_mask)
*dst ^= start_mask;
if ((start_mask + rect->width) > ppw)
dst++;
for (i = 0; i < n; i++) {
*dst++ ^= fg; /* PFILL24(fg,x1+i); */
}
if (end_mask)
*dst ^= end_mask;
dst1 += linesize;
} while (--height);
break;
}
}
return;
}
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