410 lines
10 KiB
C
410 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/module.h>
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#include <linux/slab.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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static 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 = DIV_ROUND_UP(vc->vc_font.width, 8);
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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, info);
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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 inline void bit_putcs_aligned(struct vc_data *vc, struct fb_info *info,
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const u16 *s, u32 attr, u32 cnt,
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u32 d_pitch, u32 s_pitch, u32 cellsize,
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struct fb_image *image, u8 *buf, u8 *dst)
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{
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u16 charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
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u32 idx = vc->vc_font.width >> 3;
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u8 *src;
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while (cnt--) {
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src = vc->vc_font.data + (scr_readw(s++)&
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charmask)*cellsize;
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if (attr) {
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update_attr(buf, src, attr, vc);
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src = buf;
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}
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if (likely(idx == 1))
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__fb_pad_aligned_buffer(dst, d_pitch, src, idx,
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image->height);
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else
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fb_pad_aligned_buffer(dst, d_pitch, src, idx,
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image->height);
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dst += s_pitch;
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}
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info->fbops->fb_imageblit(info, image);
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}
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static inline void bit_putcs_unaligned(struct vc_data *vc,
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struct fb_info *info, const u16 *s,
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u32 attr, u32 cnt, u32 d_pitch,
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u32 s_pitch, u32 cellsize,
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struct fb_image *image, u8 *buf,
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u8 *dst)
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{
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u16 charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
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u32 shift_low = 0, mod = vc->vc_font.width % 8;
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u32 shift_high = 8;
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u32 idx = vc->vc_font.width >> 3;
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u8 *src;
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while (cnt--) {
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src = vc->vc_font.data + (scr_readw(s++)&
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charmask)*cellsize;
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if (attr) {
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update_attr(buf, src, attr, vc);
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src = buf;
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}
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fb_pad_unaligned_buffer(dst, d_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) ? s_pitch : s_pitch - 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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info->fbops->fb_imageblit(info, image);
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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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struct fb_image image;
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u32 width = DIV_ROUND_UP(vc->vc_font.width, 8);
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u32 cellsize = width * vc->vc_font.height;
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u32 maxcnt = info->pixmap.size/cellsize;
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u32 scan_align = info->pixmap.scan_align - 1;
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u32 buf_align = info->pixmap.buf_align - 1;
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u32 mod = vc->vc_font.width % 8, cnt, pitch, size;
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u32 attribute = get_attribute(info, scr_readw(s));
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u8 *dst, *buf = NULL;
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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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if (attribute) {
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buf = kmalloc(cellsize, GFP_ATOMIC);
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if (!buf)
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return;
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}
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while (count) {
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if (count > maxcnt)
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cnt = maxcnt;
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else
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cnt = count;
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image.width = vc->vc_font.width * cnt;
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pitch = DIV_ROUND_UP(image.width, 8) + 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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bit_putcs_aligned(vc, info, s, attribute, cnt, pitch,
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width, cellsize, &image, buf, dst);
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else
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bit_putcs_unaligned(vc, info, s, attribute, cnt,
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pitch, width, cellsize, &image,
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buf, dst);
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image.dx += cnt * vc->vc_font.width;
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count -= cnt;
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s += 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 color, int bottom_only)
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{
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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 = color;
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region.rop = ROP_COPY;
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if ((int) rw > 0 && !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 ((int) bh > 0) {
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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, int mode,
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int fg, int bg)
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{
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struct fb_cursor cursor;
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struct fbcon_ops *ops = info->fbcon_par;
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unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
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int w = DIV_ROUND_UP(vc->vc_font.width, 8), c;
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int y = real_y(ops->p, vc->state.y);
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int attribute, use_sw = vc->vc_cursor_type & CUR_SW;
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int err = 1;
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char *src;
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cursor.set = 0;
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if (!vc->vc_font.data)
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return;
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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_array(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->state.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->state.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 != ops->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_array(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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ops->p->cursor_shape = vc->vc_cursor_type;
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cursor.set |= FB_CUR_SETSHAPE;
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switch (CUR_SIZE(ops->p->cursor_shape)) {
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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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if (info->fbops->fb_cursor)
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err = info->fbops->fb_cursor(info, &cursor);
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if (err)
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soft_cursor(info, &cursor);
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ops->cursor_reset = 0;
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}
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static int bit_update_start(struct fb_info *info)
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{
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struct fbcon_ops *ops = info->fbcon_par;
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int err;
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err = fb_pan_display(info, &ops->var);
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ops->var.xoffset = info->var.xoffset;
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ops->var.yoffset = info->var.yoffset;
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ops->var.vmode = info->var.vmode;
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return err;
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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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ops->update_start = bit_update_start;
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ops->rotate_font = NULL;
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if (ops->rotate)
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fbcon_set_rotate(ops);
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}
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