![James Simmons](/assets/img/avatar_default.png)
Shrink the stack when calling the drawing alignment functions. Signed-off-by: James Simmons <jsimmons@www.infradead.org> Cc: "Antonino A. Daplas" <adaplas@hotpop.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
391 lines
10 KiB
C
391 lines
10 KiB
C
/*
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* linux/drivers/video/console/bitblit.c -- BitBlitting Operation
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*
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* Originally from the 'accel_*' routines in drivers/video/console/fbcon.c
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*
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* Copyright (C) 2004 Antonino Daplas <adaplas @pol.net>
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file COPYING in the main directory of this archive for
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* more details.
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*/
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#include <linux/config.h>
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#include <linux/module.h>
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#include <linux/string.h>
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#include <linux/fb.h>
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#include <linux/vt_kern.h>
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#include <linux/console.h>
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#include <asm/types.h>
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#include "fbcon.h"
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/*
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* Accelerated handlers.
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*/
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#define FBCON_ATTRIBUTE_UNDERLINE 1
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#define FBCON_ATTRIBUTE_REVERSE 2
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#define FBCON_ATTRIBUTE_BOLD 4
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static inline int real_y(struct display *p, int ypos)
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{
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int rows = p->vrows;
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ypos += p->yscroll;
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return ypos < rows ? ypos : ypos - rows;
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}
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static inline int get_attribute(struct fb_info *info, u16 c)
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{
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int attribute = 0;
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if (fb_get_color_depth(&info->var) == 1) {
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if (attr_underline(c))
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attribute |= FBCON_ATTRIBUTE_UNDERLINE;
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if (attr_reverse(c))
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attribute |= FBCON_ATTRIBUTE_REVERSE;
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if (attr_bold(c))
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attribute |= FBCON_ATTRIBUTE_BOLD;
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}
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return attribute;
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}
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static inline void update_attr(u8 *dst, u8 *src, int attribute,
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struct vc_data *vc)
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{
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int i, offset = (vc->vc_font.height < 10) ? 1 : 2;
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int width = (vc->vc_font.width + 7) >> 3;
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unsigned int cellsize = vc->vc_font.height * width;
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u8 c;
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offset = cellsize - (offset * width);
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for (i = 0; i < cellsize; i++) {
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c = src[i];
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if (attribute & FBCON_ATTRIBUTE_UNDERLINE && i >= offset)
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c = 0xff;
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if (attribute & FBCON_ATTRIBUTE_BOLD)
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c |= c >> 1;
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if (attribute & FBCON_ATTRIBUTE_REVERSE)
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c = ~c;
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dst[i] = c;
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}
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}
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static void bit_bmove(struct vc_data *vc, struct fb_info *info, int sy,
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int sx, int dy, int dx, int height, int width)
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{
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struct fb_copyarea area;
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area.sx = sx * vc->vc_font.width;
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area.sy = sy * vc->vc_font.height;
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area.dx = dx * vc->vc_font.width;
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area.dy = dy * vc->vc_font.height;
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area.height = height * vc->vc_font.height;
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area.width = width * vc->vc_font.width;
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info->fbops->fb_copyarea(info, &area);
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}
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static void bit_clear(struct vc_data *vc, struct fb_info *info, int sy,
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int sx, int height, int width)
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{
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int bgshift = (vc->vc_hi_font_mask) ? 13 : 12;
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struct fb_fillrect region;
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region.color = attr_bgcol_ec(bgshift, vc);
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region.dx = sx * vc->vc_font.width;
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region.dy = sy * vc->vc_font.height;
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region.width = width * vc->vc_font.width;
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region.height = height * vc->vc_font.height;
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region.rop = ROP_COPY;
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info->fbops->fb_fillrect(info, ®ion);
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}
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static void bit_putcs(struct vc_data *vc, struct fb_info *info,
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const unsigned short *s, int count, int yy, int xx,
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int fg, int bg)
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{
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unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
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unsigned int width = (vc->vc_font.width + 7) >> 3;
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unsigned int cellsize = vc->vc_font.height * width;
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unsigned int maxcnt = info->pixmap.size/cellsize;
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unsigned int scan_align = info->pixmap.scan_align - 1;
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unsigned int buf_align = info->pixmap.buf_align - 1;
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unsigned int shift_low = 0, mod = vc->vc_font.width % 8;
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unsigned int shift_high = 8, pitch, cnt, size, k;
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unsigned int idx = vc->vc_font.width >> 3;
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unsigned int attribute = get_attribute(info, scr_readw(s));
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struct fb_image image;
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u8 *src, *dst, *buf = NULL;
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if (attribute) {
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buf = kmalloc(cellsize, GFP_KERNEL);
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if (!buf)
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return;
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}
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image.fg_color = fg;
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image.bg_color = bg;
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image.dx = xx * vc->vc_font.width;
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image.dy = yy * vc->vc_font.height;
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image.height = vc->vc_font.height;
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image.depth = 1;
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while (count) {
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if (count > maxcnt)
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cnt = k = maxcnt;
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else
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cnt = k = count;
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image.width = vc->vc_font.width * cnt;
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pitch = ((image.width + 7) >> 3) + scan_align;
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pitch &= ~scan_align;
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size = pitch * image.height + buf_align;
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size &= ~buf_align;
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dst = fb_get_buffer_offset(info, &info->pixmap, size);
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image.data = dst;
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if (mod) {
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while (k--) {
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src = vc->vc_font.data + (scr_readw(s++)&
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charmask)*cellsize;
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if (attribute) {
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update_attr(buf, src, attribute, vc);
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src = buf;
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}
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fb_pad_unaligned_buffer(dst, pitch, src, idx,
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image.height, shift_high,
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shift_low, mod);
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shift_low += mod;
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dst += (shift_low >= 8) ? width : width - 1;
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shift_low &= 7;
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shift_high = 8 - shift_low;
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}
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} else {
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while (k--) {
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src = vc->vc_font.data + (scr_readw(s++)&
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charmask)*cellsize;
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if (attribute) {
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update_attr(buf, src, attribute, vc);
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src = buf;
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}
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fb_pad_aligned_buffer(dst, pitch, src, idx, image.height);
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dst += width;
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}
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}
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info->fbops->fb_imageblit(info, &image);
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image.dx += cnt * vc->vc_font.width;
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count -= cnt;
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}
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/* buf is always NULL except when in monochrome mode, so in this case
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it's a gain to check buf against NULL even though kfree() handles
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NULL pointers just fine */
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if (unlikely(buf))
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kfree(buf);
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}
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static void bit_clear_margins(struct vc_data *vc, struct fb_info *info,
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int bottom_only)
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{
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int bgshift = (vc->vc_hi_font_mask) ? 13 : 12;
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unsigned int cw = vc->vc_font.width;
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unsigned int ch = vc->vc_font.height;
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unsigned int rw = info->var.xres - (vc->vc_cols*cw);
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unsigned int bh = info->var.yres - (vc->vc_rows*ch);
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unsigned int rs = info->var.xres - rw;
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unsigned int bs = info->var.yres - bh;
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struct fb_fillrect region;
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region.color = attr_bgcol_ec(bgshift, vc);
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region.rop = ROP_COPY;
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if (rw && !bottom_only) {
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region.dx = info->var.xoffset + rs;
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region.dy = 0;
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region.width = rw;
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region.height = info->var.yres_virtual;
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info->fbops->fb_fillrect(info, ®ion);
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}
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if (bh) {
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region.dx = info->var.xoffset;
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region.dy = info->var.yoffset + bs;
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region.width = rs;
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region.height = bh;
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info->fbops->fb_fillrect(info, ®ion);
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}
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}
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static void bit_cursor(struct vc_data *vc, struct fb_info *info,
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struct display *p, int mode, int softback_lines, int fg, int bg)
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{
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struct fb_cursor cursor;
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struct fbcon_ops *ops = (struct fbcon_ops *) info->fbcon_par;
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unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
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int w = (vc->vc_font.width + 7) >> 3, c;
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int y = real_y(p, vc->vc_y);
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int attribute, use_sw = (vc->vc_cursor_type & 0x10);
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char *src;
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cursor.set = 0;
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if (softback_lines) {
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if (y + softback_lines >= vc->vc_rows) {
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mode = CM_ERASE;
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ops->cursor_flash = 0;
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return;
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} else
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y += softback_lines;
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}
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c = scr_readw((u16 *) vc->vc_pos);
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attribute = get_attribute(info, c);
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src = vc->vc_font.data + ((c & charmask) * (w * vc->vc_font.height));
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if (ops->cursor_state.image.data != src ||
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ops->cursor_reset) {
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ops->cursor_state.image.data = src;
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cursor.set |= FB_CUR_SETIMAGE;
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}
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if (attribute) {
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u8 *dst;
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dst = kmalloc(w * vc->vc_font.height, GFP_ATOMIC);
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if (!dst)
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return;
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kfree(ops->cursor_data);
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ops->cursor_data = dst;
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update_attr(dst, src, attribute, vc);
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src = dst;
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}
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if (ops->cursor_state.image.fg_color != fg ||
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ops->cursor_state.image.bg_color != bg ||
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ops->cursor_reset) {
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ops->cursor_state.image.fg_color = fg;
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ops->cursor_state.image.bg_color = bg;
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cursor.set |= FB_CUR_SETCMAP;
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}
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if ((ops->cursor_state.image.dx != (vc->vc_font.width * vc->vc_x)) ||
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(ops->cursor_state.image.dy != (vc->vc_font.height * y)) ||
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ops->cursor_reset) {
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ops->cursor_state.image.dx = vc->vc_font.width * vc->vc_x;
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ops->cursor_state.image.dy = vc->vc_font.height * y;
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cursor.set |= FB_CUR_SETPOS;
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}
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if (ops->cursor_state.image.height != vc->vc_font.height ||
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ops->cursor_state.image.width != vc->vc_font.width ||
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ops->cursor_reset) {
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ops->cursor_state.image.height = vc->vc_font.height;
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ops->cursor_state.image.width = vc->vc_font.width;
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cursor.set |= FB_CUR_SETSIZE;
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}
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if (ops->cursor_state.hot.x || ops->cursor_state.hot.y ||
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ops->cursor_reset) {
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ops->cursor_state.hot.x = cursor.hot.y = 0;
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cursor.set |= FB_CUR_SETHOT;
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}
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if (cursor.set & FB_CUR_SETSIZE ||
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vc->vc_cursor_type != p->cursor_shape ||
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ops->cursor_state.mask == NULL ||
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ops->cursor_reset) {
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char *mask = kmalloc(w*vc->vc_font.height, GFP_ATOMIC);
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int cur_height, size, i = 0;
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u8 msk = 0xff;
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if (!mask)
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return;
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kfree(ops->cursor_state.mask);
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ops->cursor_state.mask = mask;
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p->cursor_shape = vc->vc_cursor_type;
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cursor.set |= FB_CUR_SETSHAPE;
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switch (p->cursor_shape & CUR_HWMASK) {
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case CUR_NONE:
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cur_height = 0;
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break;
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case CUR_UNDERLINE:
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cur_height = (vc->vc_font.height < 10) ? 1 : 2;
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break;
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case CUR_LOWER_THIRD:
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cur_height = vc->vc_font.height/3;
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break;
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case CUR_LOWER_HALF:
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cur_height = vc->vc_font.height >> 1;
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break;
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case CUR_TWO_THIRDS:
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cur_height = (vc->vc_font.height << 1)/3;
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break;
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case CUR_BLOCK:
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default:
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cur_height = vc->vc_font.height;
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break;
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}
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size = (vc->vc_font.height - cur_height) * w;
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while (size--)
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mask[i++] = ~msk;
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size = cur_height * w;
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while (size--)
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mask[i++] = msk;
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}
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switch (mode) {
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case CM_ERASE:
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ops->cursor_state.enable = 0;
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break;
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case CM_DRAW:
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case CM_MOVE:
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default:
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ops->cursor_state.enable = (use_sw) ? 0 : 1;
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break;
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}
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cursor.image.data = src;
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cursor.image.fg_color = ops->cursor_state.image.fg_color;
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cursor.image.bg_color = ops->cursor_state.image.bg_color;
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cursor.image.dx = ops->cursor_state.image.dx;
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cursor.image.dy = ops->cursor_state.image.dy;
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cursor.image.height = ops->cursor_state.image.height;
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cursor.image.width = ops->cursor_state.image.width;
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cursor.hot.x = ops->cursor_state.hot.x;
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cursor.hot.y = ops->cursor_state.hot.y;
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cursor.mask = ops->cursor_state.mask;
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cursor.enable = ops->cursor_state.enable;
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cursor.image.depth = 1;
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cursor.rop = ROP_XOR;
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info->fbops->fb_cursor(info, &cursor);
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ops->cursor_reset = 0;
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}
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void fbcon_set_bitops(struct fbcon_ops *ops)
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{
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ops->bmove = bit_bmove;
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ops->clear = bit_clear;
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ops->putcs = bit_putcs;
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ops->clear_margins = bit_clear_margins;
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ops->cursor = bit_cursor;
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}
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EXPORT_SYMBOL(fbcon_set_bitops);
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MODULE_AUTHOR("Antonino Daplas <adaplas@pol.net>");
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MODULE_DESCRIPTION("Bit Blitting Operation");
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MODULE_LICENSE("GPL");
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