--- /dev/null
+/*
+ * fbutils.c
+ *
+ * Utility routines for framebuffer interaction
+ *
+ * Copyright 2002 Russell King and Doug Lowder
+ *
+ * This file is placed under the GPL. Please see the
+ * file COPYING for details.
+ *
+ */
+
+#include "config.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/fcntl.h>
+#include <sys/ioctl.h>
+#include <sys/mman.h>
+#include <sys/time.h>
+#include <linux/fb.h>
+#include <linux/kd.h>
+#include <linux/vt.h>
+
+#include "font.h"
+
+static int con_fd, fb_fd, last_vt = -1;
+static struct fb_fix_screeninfo fix;
+static struct fb_var_screeninfo var;
+static struct fb_cmap cmap;
+static char *fbuffer;
+static int fb_fd=0;
+int xres, yres;
+
+int open_framebuffer(void)
+{
+ struct vt_stat vts;
+ char vtname[16];
+ int fd, nr;
+ unsigned short col[2];
+
+ fd = open("/dev/tty1", O_WRONLY);
+ if (fd < 0) {
+ perror("open /dev/tty1");
+ return -1;
+ }
+
+ if (ioctl(fd, VT_OPENQRY, &nr) < 0) {
+ perror("ioctl VT_OPENQRY");
+ return -1;
+ }
+ close(fd);
+
+ sprintf(vtname, "/dev/tty%d", nr);
+
+ con_fd = open(vtname, O_RDWR | O_NDELAY);
+ if (con_fd < 0) {
+ perror("open tty");
+ return -1;
+ }
+
+ if (ioctl(con_fd, VT_GETSTATE, &vts) == 0)
+ last_vt = vts.v_active;
+
+ if (ioctl(con_fd, VT_ACTIVATE, nr) < 0) {
+ perror("VT_ACTIVATE");
+ close(con_fd);
+ return -1;
+ }
+
+ if (ioctl(con_fd, VT_WAITACTIVE, nr) < 0) {
+ perror("VT_WAITACTIVE");
+ close(con_fd);
+ return -1;
+ }
+
+ if (ioctl(con_fd, KDSETMODE, KD_GRAPHICS) < 0) {
+ perror("KDSETMODE");
+ close(con_fd);
+ return -1;
+ }
+
+
+ fb_fd = open("/dev/fb0", O_RDWR);
+ if (fb_fd == -1) {
+ perror("open /dev/fb");
+ return -1;
+ }
+
+ if (ioctl(fb_fd, FBIOGET_FSCREENINFO, &fix) < 0) {
+ perror("ioctl FBIOGET_FSCREENINFO");
+ close(fb_fd);
+ return -1;
+ }
+
+ if (ioctl(fb_fd, FBIOGET_VSCREENINFO, &var) < 0) {
+ perror("ioctl FBIOGET_VSCREENINFO");
+ close(fb_fd);
+ return -1;
+ }
+ xres = var.xres;
+ yres = var.yres;
+
+ cmap.start = 0;
+ cmap.len = 2;
+ cmap.red = col;
+ cmap.green = col;
+ cmap.blue = col;
+ cmap.transp = NULL;
+
+ col[0] = 0xffff;
+ col[1] = 0;
+
+ if (ioctl(fb_fd, FBIOPUTCMAP, &cmap) < 0) {
+ perror("ioctl FBIOPUTCMAP");
+ close(fb_fd);
+ return -1;
+ }
+
+ fbuffer = mmap(NULL, fix.smem_len, PROT_READ | PROT_WRITE, MAP_FILE | MAP_SHARED, fb_fd, 0);
+ if (fbuffer == (char *)-1) {
+ perror("mmap framebuffer");
+ close(fb_fd);
+ return -1;
+ }
+ memset(fbuffer,0,fix.smem_len);
+
+ return 0;
+}
+
+void close_framebuffer(void)
+{
+ munmap(fbuffer, fix.smem_len);
+ close(fb_fd);
+
+ if (ioctl(con_fd, KDSETMODE, KD_TEXT) < 0)
+ perror("KDSETMODE");
+
+ if (last_vt >= 0)
+ if (ioctl(con_fd, VT_ACTIVATE, last_vt))
+ perror("VT_ACTIVATE");
+
+ close(con_fd);
+
+}
+
+void put_cross(int x, int y, int c)
+{
+ int off, i, s, e, loc;
+
+ if (x < 0) x = 0;
+ if (y < 0) y = 0;
+ if (x >= var.xres) x = var.xres - 1;
+ if (y >= var.yres) y = var.yres - 1;
+
+ s = x - 10;
+ if(s<0) s=0;
+ e = x + 10;
+ if(e>var.xres) e= var.xres;
+ for(i=s;i<e;i++) {
+ loc = (i + var.xoffset)*(var.bits_per_pixel/8)
+ + (y + var.yoffset)*fix.line_length;
+ switch(var.bits_per_pixel) {
+ case 8:
+ default:
+ fbuffer[loc] = c;
+ break;
+ case 16:
+ *((unsigned short *)(fbuffer + loc)) = c;
+ break;
+ case 24:
+ case 32:
+ *((unsigned int *)(fbuffer + loc)) = c;
+ break;
+ }
+ }
+ s = y - 10;
+ if(s<0) s=0;
+ e = y + 10;
+ if(e>var.yres) e = var.yres;
+ for(i=s;i<e;i++) {
+ loc = (x + var.xoffset)*(var.bits_per_pixel/8)
+ + (i + var.yoffset)*fix.line_length;
+ switch(var.bits_per_pixel) {
+ case 8:
+ default:
+ fbuffer[loc] = c;
+ break;
+ case 16:
+ *((unsigned short *)(fbuffer + loc)) = c;
+ break;
+ case 24:
+ case 32:
+ *((unsigned int *)(fbuffer + loc)) = c;
+ break;
+ }
+ }
+ return;
+}
+
+void put_char(int x, int y, int c, int color)
+{
+ int i,j,bits,loc;
+
+ for(i=0;i<font_vga_8x16.height;i++) {
+ bits = font_vga_8x16.data[font_vga_8x16.height*c + i];
+ for(j=0;j<8;j++) {
+ loc = (x + j + var.xoffset)*(var.bits_per_pixel/8)
+ + (y + i + var.yoffset)*fix.line_length;
+ if(loc>=0 && loc<fix.smem_len && ((bits >> (7-j)) & 1)) {
+ switch(var.bits_per_pixel) {
+ case 8:
+ default:
+ fbuffer[loc] = color;
+ break;
+ case 16:
+ *((unsigned short *)(fbuffer + loc)) = color;
+ break;
+ case 24:
+ case 32:
+ *((unsigned int *)(fbuffer + loc)) = color;
+ break;
+ }
+ }
+ }
+ }
+}
+
+
+
+void put_string(int x, int y, char *s, int color)
+{
+ int i;
+ for(i=0;i<strlen(s);i++) {
+ put_char( (x + font_vga_8x16.width* (i - strlen(s)/2)), y, s[i], color);
+ }
+}
+
+void setcolors(int bgcolor, int fgcolor) {
+
+ unsigned short red[2], green[2], blue[2];
+
+ red[0] = ( (bgcolor >> 16) & 0xff ) << 8;
+ red[1] = ( (fgcolor >> 16) & 0xff ) << 8;
+ green[0] = ( (bgcolor >> 8) & 0xff ) << 8;
+ green[1] = ( (fgcolor >> 8) & 0xff ) << 8;
+ blue[0] = ( bgcolor & 0xff ) << 8;
+ blue[1] = ( fgcolor & 0xff ) << 8;
+ cmap.start = 0;
+ cmap.len = 2;
+ cmap.red = red;
+ cmap.green = green;
+ cmap.blue = blue;
+ cmap.transp = NULL;
+
+ if (ioctl(fb_fd, FBIOPUTCMAP, &cmap) < 0) {
+ perror("ioctl FBIOPUTCMAP");
+ close(fb_fd);
+ return -1;
+ }
+}
+
+
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