aboutsummaryrefslogtreecommitdiff
path: root/console-client/fb.c
diff options
context:
space:
mode:
Diffstat (limited to 'console-client/fb.c')
-rw-r--r--console-client/fb.c638
1 files changed, 638 insertions, 0 deletions
diff --git a/console-client/fb.c b/console-client/fb.c
new file mode 100644
index 00000000..a7cc87b4
--- /dev/null
+++ b/console-client/fb.c
@@ -0,0 +1,638 @@
+/*
+ Copyright (C) 2024 Free Software Foundation, Inc.
+
+ This file is part of the GNU Hurd.
+
+ The GNU Hurd is free software; you can redistribute it and/or
+ modify it under the terms of the GNU General Public License as
+ published by the Free Software Foundation; either version 2, or (at
+ your option) any later version.
+
+ The GNU Hurd is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA. */
+
+#include <assert-backtrace.h>
+#include <errno.h>
+#include <error.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <iconv.h>
+#include <argp.h>
+#include <string.h>
+#include <stdint.h>
+
+#include <sys/io.h>
+#include <sys/mman.h>
+#include <sys/fcntl.h>
+#include <pthread.h>
+#include <hurd/console.h>
+#include <device/device.h>
+#include <hurd.h>
+#include <mach.h>
+
+#include "driver.h"
+
+#include "fb.h"
+#include "vga-hw.h"
+#include "vga-support.h"
+#include "bdf.h"
+#include "unicode.h"
+
+/* The font file. */
+#define DEFAULT_VGA_FONT DEFAULT_VGA_FONT_DIR "vga-system.bdf"
+static char *fb_display_font;
+
+off_t fb_ptr;
+int fb_type;
+int fb_width;
+int fb_height;
+int fb_bpp;
+int fb_wc;
+int fb_hc;
+
+static unsigned char question_mark[32] = {
+ 0x7E, /* ****** */
+ 0xC3, /* ** ** */
+ 0x99, /* * ** * */
+ 0x99, /* * ** * */
+ 0xF9, /* ***** * */
+ 0xF3, /* **** ** */
+ 0xF3, /* *** *** */
+ 0xE7, /* *** *** */
+ 0xFF, /* ******** */
+ 0xE7, /* *** *** */
+ 0xE7, /* *** *** */
+ 0x7E, /* ****** */
+ 0
+};
+
+static struct bdf_glyph qmark = {
+ .name = "missing",
+ .encoding = 0,
+ .internal_encoding = 0,
+ .bbox = { 8, 12, 0, 0 },
+ .bitmap = &question_mark[0],
+};
+
+/* Is set to 1 if the cursor state should be hidden. */
+static int cursor_hidden;
+static int cursor_state;
+static int cursor_pos_x = 0;
+static int cursor_pos_y = 0;
+
+static int current_width;
+static int current_height;
+
+/* FIXME: inherit previous char colours */
+static int current_fg = 7;
+static int current_bg = 0;
+
+#define fb_pos(_col, _row) (vga_videomem + fb_bpp/8 * ( (_row) * fb_hc * disp->width + (_col) * fb_wc ))
+#define CURSOR_GLYPH 0x2581
+#define CURSOR_COLOUR 7
+
+
+
+error_t
+fb_get_multiboot_params (void)
+{
+ error_t ret = 0;
+ mach_port_t master_device, mbinfo_dev;
+ struct multiboot_raw_info mbi;
+ char buf[sizeof(struct multiboot_raw_info)];
+ char *bufptr = &buf[0];
+ uint32_t bytes = sizeof(struct multiboot_raw_info);
+ uint32_t bytes_read = 0;
+
+ ret = get_privileged_ports (NULL, &master_device);
+ if (ret)
+ goto fail;
+
+ ret = device_open (master_device, D_READ, "mbinfo", &mbinfo_dev);
+ mach_port_deallocate (mach_task_self (), master_device);
+ if (ret)
+ goto fail;
+
+ ret = device_read (mbinfo_dev, D_READ, 0, bytes, &bufptr, &bytes_read);
+ mach_port_deallocate (mach_task_self (), mbinfo_dev);
+ if (ret)
+ goto fail;
+
+ if (bytes_read != bytes)
+ goto fail;
+
+ memcpy((void *)&mbi, (void *)bufptr, sizeof(struct multiboot_raw_info));
+
+ fb_ptr = mbi.fb_info.framebuffer_addr;
+ fb_type = mbi.fb_info.framebuffer_type;
+ fb_width = mbi.fb_info.framebuffer_width;
+ fb_height = mbi.fb_info.framebuffer_height;
+ fb_bpp = mbi.fb_info.framebuffer_bpp;
+ fb_wc = FONT_PIXELS_W;
+ fb_hc = FONT_PIXELS_H;
+ return ret;
+
+fail:
+ /* Fall back to EGA text mode */
+ fb_type = MULTIBOOT_FRAMEBUFFER_TYPE_EGA_TEXT;
+ return ret;
+}
+
+static struct bdf_glyph *
+always_find_glyph(bdf_font_t f, int ch)
+{
+ struct bdf_glyph *g;
+
+ g = bdf_find_glyph (f, ch, 0);
+ if (!g)
+ g = bdf_find_glyph (f, -1, ch);
+ if (!g)
+ g = &qmark;
+
+ return g;
+}
+
+static void
+blit_glyph(bdf_font_t f, char *mem, int ch, uint32_t fg, uint32_t bg, int width, int bpp)
+{
+ int w, h;
+
+ struct bdf_glyph *gl = always_find_glyph(f, ch);
+
+ if (bg == -1)
+ bg = current_bg;
+ if (fg == -1)
+ fg = current_fg;
+
+ for (h = 0; h < fb_hc; h++)
+ {
+ for (w = 0; w < fb_wc; w++)
+ {
+ char *pixel = mem + bpp/8 * (w + width * h);
+ uint32_t colour = (gl->bitmap[h] & (1 << (7-w))) ? fg : bg;
+ pixel[0] = (colour >> 16) & 0xff;
+ pixel[1] = (colour >> 8) & 0xff;
+ pixel[2] = colour & 0xff;
+ }
+ }
+}
+
+static void
+blit_glyph_xor(bdf_font_t f, char *mem, int ch, uint32_t fg, uint32_t bg, int width, int bpp)
+{
+ int w, h;
+
+ struct bdf_glyph *gl = always_find_glyph(f, ch);
+
+ if (bg == -1)
+ bg = current_bg;
+ if (fg == -1)
+ fg = current_fg;
+
+ for (h = 0; h < fb_hc; h++)
+ {
+ for (w = 0; w < fb_wc; w++)
+ {
+ char *pixel = mem + bpp/8 * (w + width * h);
+ uint32_t colour = (gl->bitmap[h] & (1 << (7-w))) ? fg : bg;
+ pixel[0] ^= (colour >> 16) & 0xff;
+ pixel[1] ^= (colour >> 8) & 0xff;
+ pixel[2] ^= colour & 0xff;
+ }
+ }
+}
+
+static error_t
+fb_init(void)
+{
+ error_t err;
+ int fd;
+
+ fd = open ("/dev/mem", O_RDWR);
+ if (fd < 0)
+ return errno;
+
+ vga_videomem = mmap (0, fb_width * fb_height * fb_bpp/8, PROT_READ | PROT_WRITE,
+ MAP_SHARED, fd, fb_ptr);
+ err = errno;
+ close (fd);
+ if (vga_videomem == MAP_FAILED)
+ return err;
+
+ /* Clear screen */
+ memset (vga_videomem, 0, fb_width * fb_height * fb_bpp/8);
+ return 0;
+}
+
+static void
+fb_fini(void)
+{
+ munmap (vga_videomem, fb_width * fb_height * fb_bpp/8);
+}
+
+/* Start the driver. */
+error_t
+fb_display_start (void *handle)
+{
+ error_t err;
+ struct fb_display *disp = handle;
+ FILE *font_file;
+
+ err = fb_init ();
+ if (err)
+ return err;
+
+#define LOAD_FONT(x,y,z) \
+ do { \
+ font_file = fopen (fb_display_##x ?: DEFAULT_VGA_##y, "r"); \
+ if (font_file) \
+ { \
+ bdf_error_t bdferr = bdf_read (font_file, &z, NULL); \
+ if (bdferr) \
+ { \
+ z = NULL; \
+ err = ENOSYS; \
+ } \
+ else \
+ bdf_sort_glyphs (z); \
+ fclose (font_file); \
+ } \
+ else \
+ err = ENOSYS; \
+ } while (0)
+
+ LOAD_FONT (font, FONT, disp->font);
+ if (err)
+ {
+ fb_fini ();
+ free (disp);
+ return err;
+ }
+
+ err = driver_add_display (&fb_display_ops, disp);
+ if (err)
+ {
+ fb_fini ();
+ free (disp);
+ }
+ return err;
+}
+
+/* Destroy the display HANDLE. */
+error_t
+fb_display_fini (void *handle, int force)
+{
+ struct fb_display *disp = handle;
+
+ driver_remove_display (&fb_display_ops, disp);
+ bdf_destroy (disp->font);
+ free (disp);
+ fb_fini ();
+ free (fb_display_font);
+
+ return 0;
+}
+
+uint32_t ansi_colour[8] = {
+ 0x000000, /* black */
+ 0xaa0000, /* red */
+ 0x00aa00, /* green */
+ 0xaa5500, /* yellow */
+ 0x0000aa, /* blue */
+ 0xaa00aa, /* magenta */
+ 0x00aaaa, /* cyan */
+ 0xaaaaaa /* white */
+};
+
+uint32_t ansi_colour_bold[8] = {
+ 0x555555, /* bright black */
+ 0xff5555, /* bright red */
+ 0x55ff55, /* bright green */
+ 0xffff55, /* bright yellow */
+ 0x5555ff, /* bright blue */
+ 0xff55ff, /* bright magenta */
+ 0x55ffff, /* bright cyan */
+ 0xffffff, /* bright white */
+};
+
+static void
+hide_mousecursor (struct fb_display *disp)
+{
+ char *oldpos = fb_pos((int)disp->mousecursor.posx, (int)disp->mousecursor.posy);
+
+ if (!disp->mousecursor.visible)
+ return;
+
+ /* First remove the old cursor. */
+ blit_glyph_xor (disp->font, oldpos, 'X', 0x00ff00, -1, disp->width, fb_bpp);
+ disp->mousecursor.visible = 0;
+}
+
+
+static void
+draw_mousecursor (struct fb_display *disp)
+{
+ char *newpos = fb_pos((int)disp->mousecursor.posx, (int)disp->mousecursor.posy);
+
+ if (disp->mousecursor.visible)
+ return;
+
+ /* Draw the new cursor. */
+ blit_glyph_xor (disp->font, newpos, 'X', 0x00ff00, -1, disp->width, fb_bpp);
+
+ disp->mousecursor.visible = 1;
+}
+
+
+static void
+hide_cursor(struct fb_display *disp)
+{
+ char *curpos;
+
+ if (cursor_hidden)
+ return;
+
+ /* Remove old cursor */
+ curpos = fb_pos(cursor_pos_x, cursor_pos_y);
+ blit_glyph_xor (disp->font, curpos, CURSOR_GLYPH, ansi_colour[CURSOR_COLOUR], -1, disp->width, fb_bpp);
+ cursor_hidden = 1;
+}
+
+static void
+draw_cursor(struct fb_display *disp)
+{
+ char *curpos;
+
+ if (!cursor_hidden)
+ return;
+
+ /* Add new cursor */
+ curpos = fb_pos(cursor_pos_x, cursor_pos_y);
+ blit_glyph_xor (disp->font, curpos, CURSOR_GLYPH, ansi_colour[CURSOR_COLOUR], -1, disp->width, fb_bpp);
+ cursor_hidden = 0;
+}
+
+/* Set the cursor's state to STATE on display HANDLE. */
+static error_t
+fb_display_set_cursor_status (void *handle, uint32_t state)
+{
+ struct fb_display *disp = handle;
+
+ cursor_state = state;
+
+ if (!state)
+ hide_cursor (disp);
+ else
+ draw_cursor (disp);
+
+ return 0;
+}
+
+
+/* Set the cursor's position on display HANDLE to column COL and row
+ ROW. */
+static error_t
+fb_display_set_cursor_pos (void *handle, uint32_t col, uint32_t row)
+{
+ struct fb_display *disp = handle;
+
+ /* If the cursor did not move from the character position, don't
+ bother about updating the cursor position. */
+ if (cursor_state && (col == cursor_pos_x) && (row == (cursor_pos_y)))
+ return 0;
+
+ if (cursor_state)
+ hide_cursor (disp);
+
+ cursor_pos_x = col;
+ cursor_pos_y = row;
+
+ if (cursor_state)
+ draw_cursor (disp);
+
+ return 0;
+}
+
+/* Deallocate any scarce resources occupied by the LENGTH characters
+ from column COL and row ROW. */
+static error_t
+fb_display_clear (void *handle, size_t length, uint32_t col, uint32_t row)
+{
+ return 0;
+}
+
+/* Scroll the display by the desired number of lines. The area that becomes
+ free will be filled in a subsequent write call. */
+static error_t
+fb_display_scroll (void *handle, int delta)
+{
+ struct fb_display *disp = handle;
+ int pixels, chars;
+ uint32_t r;
+
+ if (abs(delta) > disp->height/fb_hc)
+ return ENOTSUP;
+
+ pixels = abs(delta)*fb_hc * disp->width;
+ chars = abs(delta) * disp->width/fb_wc;
+
+ hide_mousecursor (disp);
+ hide_cursor (disp);
+
+ /* XXX: If the virtual console is bigger than the physical console it is
+ impossible to scroll because the data to scroll is not in memory. */
+ if (current_height > disp->height/fb_hc)
+ return ENOTSUP;
+
+ if (delta > 0)
+ {
+ memmove (vga_videomem, vga_videomem + fb_bpp/8 * pixels,
+ fb_bpp/8 * disp->width * (disp->height - delta*fb_hc));
+ }
+ else
+ {
+ memmove (vga_videomem + fb_bpp/8 * pixels, vga_videomem,
+ fb_bpp/8 * disp->width * (disp->height + delta*fb_hc));
+ }
+
+ if (delta > 0)
+ {
+ r = disp->height/fb_hc - delta;
+ memmove (&disp->refmatrix[0][0], &disp->refmatrix[0][0] + chars,
+ sizeof (struct fbchr) * disp->width/fb_wc * r);
+ }
+ else
+ {
+ r = 0;
+ memmove (&disp->refmatrix[0][0] + chars, &disp->refmatrix[0][0],
+ sizeof (struct fbchr) * disp->width/fb_wc * (disp->height/fb_hc + delta));
+ }
+
+ return 0;
+}
+
+
+
+/* Write the text STR with LENGTH characters to column COL and row
+ ROW. */
+static error_t
+fb_display_write (void *handle, conchar_t *str, size_t length,
+ uint32_t col, uint32_t row)
+{
+ struct fb_display *disp = handle;
+ char *pos;
+ struct fbchr *refpos = &disp->refmatrix[row][col];
+ char *mouse_cursor_pos;
+
+ hide_mousecursor (disp);
+ hide_cursor (disp);
+
+ /* The starting column is outside the physical screen. */
+ if (disp->width/fb_wc < current_width && col >= disp->width/fb_wc)
+ {
+ size_t skip = current_width - disp->width/fb_wc;
+ str += skip;
+ length -= skip;
+ col = 0;
+ row += 1;
+ }
+
+ mouse_cursor_pos = fb_pos((int)disp->mousecursor.posx, (int)disp->mousecursor.posy);
+
+ while (length--)
+ {
+ int charval = str->chr;
+ int fg, bg;
+
+ /* The virtual console is smaller than the physical screen. */
+ if (col >= current_width)
+ {
+ size_t skip = disp->width/fb_wc - current_width;
+ refpos += skip;
+ col = 0;
+ row += 1;
+ }
+ /* The virtual console is bigger than the physical console. */
+ else if (disp->width/fb_wc < current_width && col == disp->width/fb_wc)
+ {
+ size_t skip = current_width - disp->width/fb_wc;
+ str += skip;
+ length -= skip;
+ col = 0;
+ row += 1;
+ }
+
+ /* The screen is filled until the bottom of the screen. */
+ if (row >= disp->height/fb_hc)
+ return 0;
+
+ pos = fb_pos(col, row);
+
+ /* blit glyph to screen */
+ fg = (str->attr.intensity == CONS_ATTR_INTENSITY_BOLD)
+ ? ansi_colour_bold[str->attr.fgcol]
+ : ansi_colour[str->attr.fgcol];
+ bg = ansi_colour[str->attr.bgcol];
+ blit_glyph(disp->font, pos, charval, fg, bg, disp->width, fb_bpp);
+
+ if (pos == mouse_cursor_pos)
+ disp->mousecursor.visible = 0;
+
+ refpos->used = 1;
+ refpos->chr = charval;
+ refpos->fgcol = fg;
+ refpos->bgcol = bg;
+ refpos++;
+ col++;
+
+ /* Go to next character. */
+ str++;
+ }
+ return 0;
+}
+
+static error_t
+fb_set_dimension (void *handle, unsigned int width, unsigned int height)
+{
+ current_width = width;
+ current_height = height;
+
+ return 0;
+}
+
+
+static error_t
+fb_display_update (void *handle)
+{
+ struct fb_display *disp = handle;
+
+ if (disp->mousecursor.enabled)
+ draw_mousecursor (disp);
+
+ if (cursor_state)
+ draw_cursor (disp);
+
+ return 0;
+}
+
+
+static error_t
+fb_set_mousecursor_pos (void *handle, float x, float y)
+{
+ struct fb_display *disp = handle;
+
+ /* If the mouse did not move from the character position, don't
+ bother about updating the cursor position. */
+ if (disp->mousecursor.visible && x == (int) disp->mousecursor.posx
+ && y == (int) disp->mousecursor.posy)
+ return 0;
+
+ if (disp->mousecursor.enabled)
+ hide_mousecursor (disp);
+
+ disp->mousecursor.posx = x;
+ disp->mousecursor.posy = y;
+
+ if (disp->mousecursor.enabled)
+ draw_mousecursor (disp);
+
+ return 0;
+}
+
+
+static error_t
+fb_set_mousecursor_status (void *handle, int status)
+{
+ struct fb_display *disp = handle;
+
+ disp->mousecursor.enabled = status;
+ if (!status)
+ hide_mousecursor (disp);
+ else
+ draw_mousecursor (disp);
+
+ return 0;
+}
+
+
+
+struct display_ops fb_display_ops =
+ {
+ fb_display_set_cursor_pos,
+ fb_display_set_cursor_status,
+ fb_display_scroll,
+ fb_display_clear,
+ fb_display_write,
+ fb_display_update,
+ NULL,
+ NULL,
+ fb_set_dimension,
+ fb_set_mousecursor_pos,
+ fb_set_mousecursor_status
+ };
generated by cgit v1.2.3 (git 2.39.1) at 2025-04-04 11:00:54 +0000