fbcon-cfb24.c
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上传日期:2013-02-24
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- /*
- * linux/drivers/video/cfb24.c -- Low level frame buffer operations for 24 bpp
- * truecolor packed pixels
- *
- * Created 7 Mar 1998 by Geert Uytterhoeven
- *
- * 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.
- */
- #include <linux/module.h>
- #include <linux/tty.h>
- #include <linux/console.h>
- #include <linux/string.h>
- #include <linux/fb.h>
- #include <video/fbcon.h>
- #include <video/fbcon-cfb24.h>
- /*
- * 24 bpp packed pixels
- */
- void fbcon_cfb24_setup(struct display *p)
- {
- p->next_line = p->line_length ? p->line_length : p->var.xres_virtual*3;
- p->next_plane = 0;
- }
- void fbcon_cfb24_bmove(struct display *p, int sy, int sx, int dy, int dx,
- int height, int width)
- {
- int bytes = p->next_line, linesize = bytes * fontheight(p), rows;
- u8 *src, *dst;
- if (sx == 0 && dx == 0 && width * fontwidth(p) * 3 == bytes) {
- fb_memmove(p->screen_base + dy * linesize,
- p->screen_base + sy * linesize,
- height * linesize);
- return;
- }
- if (fontwidthlog(p)) {
- sx <<= fontwidthlog(p);
- dx <<= fontwidthlog(p);
- width <<= fontwidthlog(p);
- } else {
- sx *= fontwidth(p);
- dx *= fontwidth(p);
- width *= fontwidth(p);
- }
- sx *= 3; dx *= 3; width *= 3;
- if (dy < sy || (dy == sy && dx < sx)) {
- src = p->screen_base + sy * linesize + sx;
- dst = p->screen_base + dy * linesize + dx;
- for (rows = height * fontheight(p); rows--;) {
- fb_memmove(dst, src, width);
- src += bytes;
- dst += bytes;
- }
- } else {
- src = p->screen_base + (sy+height) * linesize + sx - bytes;
- dst = p->screen_base + (dy+height) * linesize + dx - bytes;
- for (rows = height * fontheight(p); rows--;) {
- fb_memmove(dst, src, width);
- src -= bytes;
- dst -= bytes;
- }
- }
- }
- #if defined(__BIG_ENDIAN)
- #define convert4to3(in1, in2, in3, in4, out1, out2, out3)
- do {
- out1 = (in1<<8) | (in2>>16);
- out2 = (in2<<16) | (in3>>8);
- out3 = (in3<<24) | in4;
- } while (0);
- #elif defined(__LITTLE_ENDIAN)
- #define convert4to3(in1, in2, in3, in4, out1, out2, out3)
- do {
- out1 = in1 | (in2<<24);
- out2 = (in2>> 8) | (in3<<16);
- out3 = (in3>>16) | (in4<< 8);
- } while (0);
- #else
- #error FIXME: No endianness??
- #endif
- static inline void store4pixels(u32 d1, u32 d2, u32 d3, u32 d4, u32 *dest)
- {
- u32 o1, o2, o3;
- convert4to3(d1, d2, d3, d4, o1, o2, o3);
- fb_writel (o1, dest++);
- fb_writel (o2, dest++);
- fb_writel (o3, dest);
- }
- static inline void rectfill(u8 *dest, int width, int height, u32 data,
- int linesize)
- {
- u32 d1, d2, d3;
- int i;
- convert4to3(data, data, data, data, d1, d2, d3);
- while (height-- > 0) {
- u32 *p = (u32 *)dest;
- for (i = 0; i < width/4; i++) {
- fb_writel(d1, p++);
- fb_writel(d2, p++);
- fb_writel(d3, p++);
- }
- dest += linesize;
- }
- }
- void fbcon_cfb24_clear(struct vc_data *conp, struct display *p, int sy, int sx,
- int height, int width)
- {
- u8 *dest;
- int bytes = p->next_line, lines = height * fontheight(p);
- u32 bgx;
- dest = p->screen_base + sy * fontheight(p) * bytes + sx * fontwidth(p) * 3;
- bgx = ((u32 *)p->dispsw_data)[attr_bgcol_ec(p, conp)];
- width *= fontwidth(p)/4;
- if (width * 12 == bytes)
- rectfill(dest, lines * width * 4, 1, bgx, bytes);
- else
- rectfill(dest, width * 4, lines, bgx, bytes);
- }
- void fbcon_cfb24_putc(struct vc_data *conp, struct display *p, int c, int yy,
- int xx)
- {
- u8 *dest, *cdat, bits;
- int bytes = p->next_line, rows;
- u32 eorx, fgx, bgx, d1, d2, d3, d4;
- dest = p->screen_base + yy * fontheight(p) * bytes + xx * fontwidth(p) * 3;
- if (fontwidth(p) <= 8)
- cdat = p->fontdata + (c & p->charmask) * fontheight(p);
- else
- cdat = p->fontdata + ((c & p->charmask) * fontheight(p) << 1);
- fgx = ((u32 *)p->dispsw_data)[attr_fgcol(p, c)];
- bgx = ((u32 *)p->dispsw_data)[attr_bgcol(p, c)];
- eorx = fgx ^ bgx;
- for (rows = fontheight(p); rows--; dest += bytes) {
- bits = *cdat++;
- d1 = (-(bits >> 7) & eorx) ^ bgx;
- d2 = (-(bits >> 6 & 1) & eorx) ^ bgx;
- d3 = (-(bits >> 5 & 1) & eorx) ^ bgx;
- d4 = (-(bits >> 4 & 1) & eorx) ^ bgx;
- store4pixels(d1, d2, d3, d4, (u32 *)dest);
- if (fontwidth(p) < 8)
- continue;
- d1 = (-(bits >> 3 & 1) & eorx) ^ bgx;
- d2 = (-(bits >> 2 & 1) & eorx) ^ bgx;
- d3 = (-(bits >> 1 & 1) & eorx) ^ bgx;
- d4 = (-(bits & 1) & eorx) ^ bgx;
- store4pixels(d1, d2, d3, d4, (u32 *)(dest+12));
- if (fontwidth(p) < 12)
- continue;
- bits = *cdat++;
- d1 = (-(bits >> 7) & eorx) ^ bgx;
- d2 = (-(bits >> 6 & 1) & eorx) ^ bgx;
- d3 = (-(bits >> 5 & 1) & eorx) ^ bgx;
- d4 = (-(bits >> 4 & 1) & eorx) ^ bgx;
- store4pixels(d1, d2, d3, d4, (u32 *)(dest+24));
- if (fontwidth(p) < 16)
- continue;
- d1 = (-(bits >> 3 & 1) & eorx) ^ bgx;
- d2 = (-(bits >> 2 & 1) & eorx) ^ bgx;
- d3 = (-(bits >> 1 & 1) & eorx) ^ bgx;
- d4 = (-(bits & 1) & eorx) ^ bgx;
- store4pixels(d1, d2, d3, d4, (u32 *)(dest+36));
- }
- }
- void fbcon_cfb24_putcs(struct vc_data *conp, struct display *p,
- const unsigned short *s, int count, int yy, int xx)
- {
- u8 *cdat, *dest, *dest0, bits;
- u16 c;
- int rows, bytes = p->next_line;
- u32 eorx, fgx, bgx, d1, d2, d3, d4;
- dest0 = p->screen_base + yy * fontheight(p) * bytes + xx * fontwidth(p) * 3;
- c = scr_readw(s);
- fgx = ((u32 *)p->dispsw_data)[attr_fgcol(p, c)];
- bgx = ((u32 *)p->dispsw_data)[attr_bgcol(p, c)];
- eorx = fgx ^ bgx;
- while (count--) {
- c = scr_readw(s++) & p->charmask;
- if (fontwidth(p) <= 8)
- cdat = p->fontdata + c * fontheight(p);
-
- else
- cdat = p->fontdata + (c * fontheight(p) << 1);
- for (rows = fontheight(p), dest = dest0; rows--; dest += bytes) {
- bits = *cdat++;
- d1 = (-(bits >> 7) & eorx) ^ bgx;
- d2 = (-(bits >> 6 & 1) & eorx) ^ bgx;
- d3 = (-(bits >> 5 & 1) & eorx) ^ bgx;
- d4 = (-(bits >> 4 & 1) & eorx) ^ bgx;
- store4pixels(d1, d2, d3, d4, (u32 *)dest);
- if (fontwidth(p) < 8)
- continue;
- d1 = (-(bits >> 3 & 1) & eorx) ^ bgx;
- d2 = (-(bits >> 2 & 1) & eorx) ^ bgx;
- d3 = (-(bits >> 1 & 1) & eorx) ^ bgx;
- d4 = (-(bits & 1) & eorx) ^ bgx;
- store4pixels(d1, d2, d3, d4, (u32 *)(dest+12));
- if (fontwidth(p) < 12)
- continue;
- bits = *cdat++;
- d1 = (-(bits >> 7) & eorx) ^ bgx;
- d2 = (-(bits >> 6 & 1) & eorx) ^ bgx;
- d3 = (-(bits >> 5 & 1) & eorx) ^ bgx;
- d4 = (-(bits >> 4 & 1) & eorx) ^ bgx;
- store4pixels(d1, d2, d3, d4, (u32 *)(dest+24));
- if (fontwidth(p) < 16)
- continue;
- d1 = (-(bits >> 3 & 1) & eorx) ^ bgx;
- d2 = (-(bits >> 2 & 1) & eorx) ^ bgx;
- d3 = (-(bits >> 1 & 1) & eorx) ^ bgx;
- d4 = (-(bits & 1) & eorx) ^ bgx;
- store4pixels(d1, d2, d3, d4, (u32 *)(dest+36));
- }
- dest0 += fontwidth(p)*3;
- }
- }
- void fbcon_cfb24_revc(struct display *p, int xx, int yy)
- {
- u8 *dest;
- int bytes = p->next_line, rows;
- dest = p->screen_base + yy * fontheight(p) * bytes + xx * fontwidth(p) * 3;
- for (rows = fontheight(p); rows--; dest += bytes) {
- switch (fontwidth(p)) {
- case 16:
- fb_writel(fb_readl(dest+36) ^ 0xffffffff, dest+36);
- fb_writel(fb_readl(dest+40) ^ 0xffffffff, dest+40);
- fb_writel(fb_readl(dest+44) ^ 0xffffffff, dest+44);
- /* FALL THROUGH */
- case 12:
- fb_writel(fb_readl(dest+24) ^ 0xffffffff, dest+24);
- fb_writel(fb_readl(dest+28) ^ 0xffffffff, dest+28);
- fb_writel(fb_readl(dest+32) ^ 0xffffffff, dest+32);
- /* FALL THROUGH */
- case 8:
- fb_writel(fb_readl(dest+12) ^ 0xffffffff, dest+12);
- fb_writel(fb_readl(dest+16) ^ 0xffffffff, dest+16);
- fb_writel(fb_readl(dest+20) ^ 0xffffffff, dest+20);
- /* FALL THROUGH */
- case 4:
- fb_writel(fb_readl(dest+0) ^ 0xffffffff, dest+0);
- fb_writel(fb_readl(dest+4) ^ 0xffffffff, dest+4);
- fb_writel(fb_readl(dest+8) ^ 0xffffffff, dest+8);
- }
- }
- }
- void fbcon_cfb24_clear_margins(struct vc_data *conp, struct display *p,
- int bottom_only)
- {
- int bytes = p->next_line;
- u32 bgx;
- unsigned int right_start = conp->vc_cols*fontwidth(p);
- unsigned int bottom_start = conp->vc_rows*fontheight(p);
- unsigned int right_width, bottom_width;
- bgx = ((u32 *)p->dispsw_data)[attr_bgcol_ec(p, conp)];
- if (!bottom_only && (right_width = p->var.xres-right_start))
- rectfill(p->screen_base+right_start*3, right_width,
- p->var.yres_virtual, bgx, bytes);
- if ((bottom_width = p->var.yres-bottom_start))
- rectfill(p->screen_base+(p->var.yoffset+bottom_start)*bytes,
- right_start, bottom_width, bgx, bytes);
- }
- /*
- * `switch' for the low level operations
- */
- struct display_switch fbcon_cfb24 = {
- setup: fbcon_cfb24_setup,
- bmove: fbcon_cfb24_bmove,
- clear: fbcon_cfb24_clear,
- putc: fbcon_cfb24_putc,
- putcs: fbcon_cfb24_putcs,
- revc: fbcon_cfb24_revc,
- clear_margins: fbcon_cfb24_clear_margins,
- fontwidthmask: FONTWIDTH(4)|FONTWIDTH(8)|FONTWIDTH(12)|FONTWIDTH(16)
- };
- #ifdef MODULE
- MODULE_LICENSE("GPL");
- int init_module(void)
- {
- return 0;
- }
- void cleanup_module(void)
- {}
- #endif /* MODULE */
- /*
- * Visible symbols for modules
- */
- EXPORT_SYMBOL(fbcon_cfb24);
- EXPORT_SYMBOL(fbcon_cfb24_setup);
- EXPORT_SYMBOL(fbcon_cfb24_bmove);
- EXPORT_SYMBOL(fbcon_cfb24_clear);
- EXPORT_SYMBOL(fbcon_cfb24_putc);
- EXPORT_SYMBOL(fbcon_cfb24_putcs);
- EXPORT_SYMBOL(fbcon_cfb24_revc);
- EXPORT_SYMBOL(fbcon_cfb24_clear_margins);