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/*
* Copyright (c) 2006 Ondrej Palkovsky
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* - The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/** @defgroup egafb EGA framebuffer
* @brief HelenOS EGA framebuffer.
* @ingroup fbs
* @{
*/
/** @file
*/
#include <stdlib.h>
#include <unistd.h>
#include <align.h>
#include <async.h>
#include <ipc/ipc.h>
#include <errno.h>
#include <stdio.h>
#include <ddi.h>
#include <sysinfo.h>
#include <as.h>
#include <ipc/fb.h>
#include <ipc/ipc.h>
#include <ipc/ns.h>
#include <ipc/services.h>
#include <libarch/ddi.h>
#include <io/style.h>
#include <io/color.h>
#include <sys/types.h>
#include "ega.h"
#include "../console/screenbuffer.h"
#include "main.h"
#define MAX_SAVED_SCREENS 256
typedef struct saved_screen {
short *data;
} saved_screen;
saved_screen saved_screens[MAX_SAVED_SCREENS];
#define EGA_IO_BASE ((ioport8_t *) 0x3d4)
#define EGA_IO_SIZE 2
int ega_normal_color = 0x0f;
int ega_inverted_color = 0xf0;
#define NORMAL_COLOR ega_normal_color
#define INVERTED_COLOR ega_inverted_color
/* Allow only 1 connection */
static int client_connected = 0;
static unsigned int scr_width;
static unsigned int scr_height;
static uint8_t *scr_addr;
static unsigned int style;
static unsigned attr_to_ega_style(const attrs_t *a);
static uint8_t ega_glyph(wchar_t ch);
static void clrscr(void)
{
unsigned i;
for (i = 0; i < scr_width * scr_height; i++) {
scr_addr[i * 2] = ' ';
scr_addr[i * 2 + 1] = style;
}
}
static void cursor_goto(unsigned int col, unsigned int row)
{
int ega_cursor;
ega_cursor = col + scr_width * row;
pio_write_8(EGA_IO_BASE, 0xe);
pio_write_8(EGA_IO_BASE + 1, (ega_cursor >> 8) & 0xff);
pio_write_8(EGA_IO_BASE, 0xf);
pio_write_8(EGA_IO_BASE + 1, ega_cursor & 0xff);
}
static void cursor_disable(void)
{
uint8_t stat;
pio_write_8(EGA_IO_BASE, 0xa);
stat = pio_read_8(EGA_IO_BASE + 1);
pio_write_8(EGA_IO_BASE, 0xa);
pio_write_8(EGA_IO_BASE + 1, stat | (1 << 5));
}
static void cursor_enable(void)
{
uint8_t stat;
pio_write_8(EGA_IO_BASE, 0xa);
stat = pio_read_8(EGA_IO_BASE + 1);
pio_write_8(EGA_IO_BASE, 0xa);
pio_write_8(EGA_IO_BASE + 1, stat & (~(1 << 5)));
}
static void scroll(int rows)
{
unsigned i;
if (rows > 0) {
memmove(scr_addr, ((char *) scr_addr) + rows * scr_width * 2,
scr_width * scr_height * 2 - rows * scr_width * 2);
for (i = 0; i < rows * scr_width; i++)
(((short *) scr_addr) + scr_width * scr_height - rows *
scr_width)[i] = ((style << 8) + ' ');
} else if (rows < 0) {
memmove(((char *)scr_addr) - rows * scr_width * 2, scr_addr,
scr_width * scr_height * 2 + rows * scr_width * 2);
for (i = 0; i < -rows * scr_width; i++)
((short *)scr_addr)[i] = ((style << 8 ) + ' ');
}
}
static void printchar(wchar_t c, unsigned int col, unsigned int row)
{
scr_addr[(row * scr_width + col) * 2] = ega_glyph(c);
scr_addr[(row * scr_width + col) * 2 + 1] = style;
cursor_goto(col + 1, row);
}
/** Draw text data to viewport.
*
* @param vport Viewport id
* @param data Text data.
* @param x Leftmost column of the area.
* @param y Topmost row of the area.
* @param w Number of rows.
* @param h Number of columns.
*/
static void draw_text_data(keyfield_t *data, unsigned int x,
unsigned int y, unsigned int w, unsigned int h)
{
unsigned int i, j;
keyfield_t *field;
uint8_t *dp;
for (j = 0; j < h; j++) {
for (i = 0; i < w; i++) {
field = &data[j * w + i];
dp = &scr_addr[2 * ((y + j) * scr_width + (x + i))];
dp[0] = ega_glyph(field->character);
dp[1] = attr_to_ega_style(&field->attrs);
}
}
}
static int save_screen(void)
{
int i;
for (i = 0; (i < MAX_SAVED_SCREENS) && (saved_screens[i].data); i++)
;
if (i == MAX_SAVED_SCREENS)
return EINVAL;
if (!(saved_screens[i].data = malloc(2 * scr_width * scr_height)))
return ENOMEM;
memcpy(saved_screens[i].data, scr_addr, 2 * scr_width * scr_height);
return i;
}
static int print_screen(int i)
{
if (saved_screens[i].data)
memcpy(scr_addr, saved_screens[i].data, 2 * scr_width *
scr_height);
else
return EINVAL;
return i;
}
static int style_to_ega_style(int style)
{
unsigned int ega_style;
switch (style) {
case STYLE_NORMAL:
ega_style = INVERTED_COLOR;
break;
case STYLE_EMPHASIS:
ega_style = INVERTED_COLOR | 4;
break;
default:
return INVERTED_COLOR;
}
return ega_style;
}
static unsigned int color_to_ega_style(int fg_color, int bg_color, int attr)
{
unsigned int style;
style = (fg_color & 7) | ((bg_color & 7) << 4);
if (attr & CATTR_BRIGHT)
style = style | 0x08;
return style;
}
static unsigned int rgb_to_ega_style(uint32_t fg, uint32_t bg)
{
return (fg > bg) ? NORMAL_COLOR : INVERTED_COLOR;
}
static unsigned attr_to_ega_style(const attrs_t *a)
{
switch (a->t) {
case at_style:
return style_to_ega_style(a->a.s.style);
case at_rgb:
return rgb_to_ega_style(a->a.r.fg_color, a->a.r.bg_color);
case at_idx:
return color_to_ega_style(a->a.i.fg_color,
a->a.i.bg_color, a->a.i.flags);
default:
return INVERTED_COLOR;
}
}
static uint8_t ega_glyph(wchar_t ch)
{
if (ch >= 0 && ch < 128)
return ch;
return '?';
}
static void ega_client_connection(ipc_callid_t iid, ipc_call_t *icall)
{
int retval;
ipc_callid_t callid;
ipc_call_t call;
wchar_t c;
unsigned int row, col, w, h;
int bg_color, fg_color, attr;
uint32_t bg_rgb, fg_rgb;
keyfield_t *interbuf = NULL;
size_t intersize = 0;
int i;
if (client_connected) {
ipc_answer_0(iid, ELIMIT);
return;
}
client_connected = 1;
ipc_answer_0(iid, EOK); /* Accept connection */
while (1) {
callid = async_get_call(&call);
switch (IPC_GET_METHOD(call)) {
case IPC_M_PHONE_HUNGUP:
client_connected = 0;
ipc_answer_0(callid, EOK);
return; /* Exit thread */
case IPC_M_SHARE_OUT:
/* We accept one area for data interchange */
intersize = IPC_GET_ARG2(call);
if (intersize >= scr_width * scr_height *
sizeof(*interbuf)) {
receive_comm_area(callid, &call,
(void *) &interbuf);
continue;
}
retval = EINVAL;
break;
case FB_DRAW_TEXT_DATA:
col = IPC_GET_ARG1(call);
row = IPC_GET_ARG2(call);
w = IPC_GET_ARG3(call);
h = IPC_GET_ARG4(call);
if (!interbuf) {
retval = EINVAL;
break;
}
if (col + w > scr_width || row + h > scr_height) {
retval = EINVAL;
break;
}
draw_text_data(interbuf, col, row, w, h);
retval = 0;
break;
case FB_GET_CSIZE:
ipc_answer_2(callid, EOK, scr_width, scr_height);
continue;
case FB_GET_COLOR_CAP:
ipc_answer_1(callid, EOK, FB_CCAP_INDEXED);
continue;
case FB_CLEAR:
clrscr();
retval = 0;
break;
case FB_PUTCHAR:
c = IPC_GET_ARG1(call);
col = IPC_GET_ARG2(call);
row = IPC_GET_ARG3(call);
if (col >= scr_width || row >= scr_height) {
retval = EINVAL;
break;
}
printchar(c, col, row);
retval = 0;
break;
case FB_CURSOR_GOTO:
col = IPC_GET_ARG1(call);
row = IPC_GET_ARG2(call);
if (row >= scr_height || col >= scr_width) {
retval = EINVAL;
break;
}
cursor_goto(col, row);
retval = 0;
break;
case FB_SCROLL:
i = IPC_GET_ARG1(call);
if (i > (int) scr_height || i < -((int) scr_height)) {
retval = EINVAL;
break;
}
scroll(i);
retval = 0;
break;
case FB_CURSOR_VISIBILITY:
if (IPC_GET_ARG1(call))
cursor_enable();
else
cursor_disable();
retval = 0;
break;
case FB_SET_STYLE:
style = style_to_ega_style(IPC_GET_ARG1(call));
retval = 0;
break;
case FB_SET_COLOR:
fg_color = IPC_GET_ARG1(call);
bg_color = IPC_GET_ARG2(call);
attr = IPC_GET_ARG3(call);
style = color_to_ega_style(fg_color, bg_color, attr);
retval = 0;
break;
case FB_SET_RGB_COLOR:
fg_rgb = IPC_GET_ARG1(call);
bg_rgb = IPC_GET_ARG2(call);
style = rgb_to_ega_style(fg_rgb, bg_rgb);
retval = 0;
break;
case FB_VP_DRAW_PIXMAP:
i = IPC_GET_ARG2(call);
retval = print_screen(i);
break;
case FB_VP2PIXMAP:
retval = save_screen();
break;
case FB_DROP_PIXMAP:
i = IPC_GET_ARG1(call);
if (i >= MAX_SAVED_SCREENS) {
retval = EINVAL;
break;
}
if (saved_screens[i].data) {
free(saved_screens[i].data);
saved_screens[i].data = NULL;
}
retval = 0;
break;
case FB_SCREEN_YIELD:
case FB_SCREEN_RECLAIM:
retval = EOK;
break;
default:
retval = EINVAL;
}
ipc_answer_0(callid, retval);
}
}
int ega_init(void)
{
void *ega_ph_addr;
size_t sz;
ega_ph_addr = (void *) sysinfo_value("fb.address.physical");
scr_width = sysinfo_value("fb.width");
scr_height = sysinfo_value("fb.height");
if (sysinfo_value("fb.blinking")) {
ega_normal_color &= 0x77;
ega_inverted_color &= 0x77;
}
style = NORMAL_COLOR;
iospace_enable(task_get_id(), (void *) EGA_IO_BASE, 2);
sz = scr_width * scr_height * 2;
scr_addr = as_get_mappable_page(sz);
if (physmem_map(ega_ph_addr, scr_addr, ALIGN_UP(sz, PAGE_SIZE) >>
PAGE_WIDTH, AS_AREA_READ | AS_AREA_WRITE) != 0)
return -1;
async_set_client_connection(ega_client_connection);
return 0;
}
/**
* @}
*/