/*
* 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.
*/
#include <genarch/fb/font-8x16.h>
#include <genarch/fb/fb.h>
#include <console/chardev.h>
#include <console/console.h>
#include <panic.h>
#include <memstr.h>
#include "helenos.xbm"
SPINLOCK_INITIALIZE(fb_lock);
static __u8 *fbaddress = NULL;
static unsigned int xres = 0;
static unsigned int yres = 0;
static unsigned int scanline = 0;
static unsigned int pixelbytes = 0;
static unsigned int position = 0;
static unsigned int columns = 0;
static unsigned int rows = 0;
#define COL_WIDTH 8
#define ROW_BYTES (scanline * FONT_SCANLINES)
#define BGCOLOR 0x000080
#define FGCOLOR 0xffff00
#define LOGOCOLOR 0x2020b0
#define RED(x, bits) ((x >> (16 + 8 - bits)) & ((1 << bits) - 1))
#define GREEN(x, bits) ((x >> (8 + 8 - bits)) & ((1 << bits) - 1))
#define BLUE(x, bits) ((x >> (8 - bits)) & ((1 << bits) - 1))
#define POINTPOS(x, y) (y * scanline + x * pixelbytes)
/***************************************************************/
/* Pixel specific fuctions */
static void (*putpixel)(unsigned int x, unsigned int y, int color);
static int (*getpixel)(unsigned int x, unsigned int y);
/** Put pixel - 24-bit depth, 1 free byte */
static void putpixel_4byte(unsigned int x, unsigned int y, int color)
{
*((__u32 *)(fbaddress + POINTPOS(x, y))) = color;
}
/** Return pixel color - 24-bit depth, 1 free byte */
static int getpixel_4byte(unsigned int x, unsigned int y)
{
return *((__u32 *)(fbaddress + POINTPOS(x, y))) & 0xffffff;
}
/** Put pixel - 24-bit depth */
static void putpixel_3byte(unsigned int x, unsigned int y, int color)
{
unsigned int startbyte = POINTPOS(x, y);
fbaddress[startbyte] = RED(color, 8);
fbaddress[startbyte + 1] = GREEN(color, 8);
fbaddress[startbyte + 2] = BLUE(color, 8);
}
/** Return pixel color - 24-bit depth */
static int getpixel_3byte(unsigned int x, unsigned int y)
{
unsigned int startbyte = POINTPOS(x, y);
return fbaddress[startbyte] << 16 | fbaddress[startbyte + 1] << 8 | fbaddress[startbyte + 2];
}
/** Put pixel - 16-bit depth (5:6:6) */
static void putpixel_2byte(unsigned int x, unsigned int y, int color)
{
/* 5-bit, 5-bits, 5-bits */
*((__u16 *)(fbaddress + POINTPOS(x, y))) = RED(color, 5) << 11 | GREEN(color, 6) << 5 | BLUE(color, 5);
}
/** Return pixel color - 16-bit depth (5:6:6) */
static int getpixel_2byte(unsigned int x, unsigned int y)
{
int color = *((__u16 *)(fbaddress + POINTPOS(x, y)));
return (((color >> 11) & 0x1f) << (16 + 3)) | (((color >> 5) & 0x3f) << (8 + 2)) | ((color & 0x1f) << 3);
}
/** Put pixel - 8-bit depth (3:2:3) */
static void putpixel_1byte(unsigned int x, unsigned int y, int color)
{
fbaddress[POINTPOS(x, y)] = RED(color, 3) << 5 | GREEN(color, 2) << 3 | BLUE(color, 3);
}
/** Return pixel color - 8-bit depth (3:2:3) */
static int getpixel_1byte(unsigned int x, unsigned int y)
{
int color = fbaddress[POINTPOS(x, y)];
return (((color >> 5) & 0x7) << (16 + 5)) | (((color >> 3) & 0x3) << (8 + 6)) | ((color & 0x7) << 5);
}
/** Fill line with color BGCOLOR */
static void clear_line(unsigned int y)
{
unsigned int x;
for (x = 0; x < xres; x++)
(*putpixel)(x, y, BGCOLOR);
}
/** Fill screen with background color */
static void clear_screen(void)
{
unsigned int y;
for (y = 0; y < yres; y++)
clear_line(y);
}
/** Scroll screen one row up */
static void scroll_screen(void)
{
unsigned int i;
memcpy((void *) fbaddress
, (void *) &fbaddress
[ROW_BYTES
], scanline
* yres
- ROW_BYTES
);
/* Clear last row */
for (i = 0; i < FONT_SCANLINES; i++)
clear_line((rows - 1) * FONT_SCANLINES + i);
}
static void invert_pixel(unsigned int x, unsigned int y)
{
(*putpixel)(x, y, ~(*getpixel)(x, y));
}
/** Draw one line of glyph at a given position */
static void draw_glyph_line(unsigned int glline, unsigned int x, unsigned int y)
{
unsigned int i;
for (i = 0; i < 8; i++)
if (glline & (1 << (7 - i))) {
(*putpixel)(x + i, y, FGCOLOR);
} else
(*putpixel)(x + i, y, BGCOLOR);
}
/***************************************************************/
/* Character-console functions */
/** Draw character at given position */
static void draw_glyph(__u8 glyph, unsigned int col, unsigned int row)
{
unsigned int y;
for (y = 0; y < FONT_SCANLINES; y++)
draw_glyph_line(fb_font[glyph * FONT_SCANLINES + y], col * COL_WIDTH, row * FONT_SCANLINES + y);
}
/** Invert character at given position */
static void invert_char(unsigned int col, unsigned int row)
{
unsigned int x;
unsigned int y;
for (x = 0; x < COL_WIDTH; x++)
for (y = 0; y < FONT_SCANLINES; y++)
invert_pixel(col * COL_WIDTH + x, row * FONT_SCANLINES + y);
}
/** Draw character at default position */
static void draw_char(char chr)
{
draw_glyph(chr, position % columns, position / columns);
}
static void draw_logo(unsigned int startx, unsigned int starty)
{
unsigned int x;
unsigned int y;
unsigned int byte;
unsigned int rowbytes;
rowbytes = (helenos_width - 1) / 8 + 1;
for (y = 0; y < helenos_height; y++)
for (x = 0; x < helenos_width; x++) {
byte = helenos_bits[rowbytes * y + x / 8];
byte >>= x % 8;
if (byte & 1)
(*putpixel)(startx + x, starty + y, LOGOCOLOR);
}
}
/***************************************************************/
/* Stdout specific functions */
static void invert_cursor(void)
{
invert_char(position % columns, position / columns);
}
/** Print character to screen
*
* Emulate basic terminal commands
*/
static void fb_putchar(chardev_t *dev, char ch)
{
spinlock_lock(&fb_lock);
switch (ch) {
case '\n':
invert_cursor();
position += columns;
position -= position % columns;
break;
case '\r':
invert_cursor();
position -= position % columns;
break;
case '\b':
invert_cursor();
if (position % columns)
position--;
break;
case '\t':
invert_cursor();
do {
draw_char(' ');
position++;
} while (position % 8);
break;
default:
draw_char(ch);
position++;
}
if (position >= columns * rows) {
position -= columns;
scroll_screen();
}
invert_cursor();
spinlock_unlock(&fb_lock);
}
static chardev_t framebuffer;
static chardev_operations_t fb_ops = {
.write = fb_putchar,
};
/** Initialize framebuffer as a chardev output device
*
* @param addr Address of theframebuffer
* @param x Screen width in pixels
* @param y Screen height in pixels
* @param bpp Bits per pixel (8, 16, 24, 32)
* @param scan Bytes per one scanline
*
*/
void fb_init(__address addr, unsigned int x, unsigned int y, unsigned int bpp, unsigned int scan)
{
switch (bpp) {
case 8:
putpixel = putpixel_1byte;
getpixel = getpixel_1byte;
pixelbytes = 1;
break;
case 16:
putpixel = putpixel_2byte;
getpixel = getpixel_2byte;
pixelbytes = 2;
break;
case 24:
putpixel = putpixel_3byte;
getpixel = getpixel_3byte;
pixelbytes = 3;
break;
case 32:
putpixel = putpixel_4byte;
getpixel = getpixel_4byte;
pixelbytes = 4;
break;
default:
panic("Unsupported bpp");
}
fbaddress = (unsigned char *) addr;
xres = x;
yres = y;
scanline = scan;
rows = y / FONT_SCANLINES;
columns = x / COL_WIDTH;
clear_screen();
draw_logo(xres - helenos_width, 0);
invert_cursor();
chardev_initialize("fb", &framebuffer, &fb_ops);
stdout = &framebuffer;
}