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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.
*/
/** @addtogroup genarch
* @{
*/
/** @file
*/
#include <genarch/fb/font-8x16.h>
#include <genarch/fb/visuals.h>
#include <genarch/fb/fb.h>
#include <console/chardev.h>
#include <console/console.h>
#include <sysinfo/sysinfo.h>
#include <mm/slab.h>
#include <align.h>
#include <panic.h>
#include <memstr.h>
#include <config.h>
#include <bitops.h>
#include <print.h>
#include "helenos.xbm"
SPINLOCK_INITIALIZE(fb_lock);
static uint8_t *fbaddress = NULL;
static uint8_t *blankline = NULL;
static uint8_t *dbbuffer = NULL; /* Buffer for fast scrolling console */
static int dboffset;
static unsigned int xres = 0;
static unsigned int yres = 0;
static unsigned int scanline = 0;
static unsigned int pixelbytes = 0;
#ifdef FB_INVERT_COLORS
static bool invert_colors = true;
#else
static bool invert_colors = false;
#endif
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 (*rgb2scr)(void *, int);
static int (*scr2rgb)(void *);
static inline int COLOR(int color)
{
return invert_colors ? ~color : color;
}
/* Conversion routines between different color representations */
static void rgb_byte0888(void *dst, int rgb)
{
*((int *) dst) = rgb;
}
static int byte0888_rgb(void *src)
{
return (*((int *) src)) & 0xffffff;
}
static void rgb_byte888(void *dst, int rgb)
{
uint8_t *scr = dst;
#if defined(FB_INVERT_ENDIAN)
scr[0] = RED(rgb, 8);
scr[1] = GREEN(rgb, 8);
scr[2] = BLUE(rgb, 8);
#else
scr[2] = RED(rgb, 8);
scr[1] = GREEN(rgb, 8);
scr[0] = BLUE(rgb, 8);
#endif
}
static int byte888_rgb(void *src)
{
uint8_t *scr = src;
#if defined(FB_INVERT_ENDIAN)
return scr[0] << 16 | scr[1] << 8 | scr[2];
#else
return scr[2] << 16 | scr[1] << 8 | scr[0];
#endif
}
/** 16-bit depth (5:5:5) */
static void rgb_byte555(void *dst, int rgb)
{
/* 5-bit, 5-bits, 5-bits */
*((uint16_t *) dst) = RED(rgb, 5) << 10 | GREEN(rgb, 5) << 5 | BLUE(rgb, 5);
}
/** 16-bit depth (5:5:5) */
static int byte555_rgb(void *src)
{
int color = *(uint16_t *)(src);
return (((color >> 10) & 0x1f) << (16 + 3)) | (((color >> 5) & 0x1f) << (8 + 3)) | ((color & 0x1f) << 3);
}
/** 16-bit depth (5:6:5) */
static void rgb_byte565(void *dst, int rgb)
{
/* 5-bit, 6-bits, 5-bits */
*((uint16_t *) dst) = RED(rgb, 5) << 11 | GREEN(rgb, 6) << 5 | BLUE(rgb, 5);
}
/** 16-bit depth (5:6:5) */
static int byte565_rgb(void *src)
{
int color = *(uint16_t *)(src);
return (((color >> 11) & 0x1f) << (16 + 3)) | (((color >> 5) & 0x3f) << (8 + 2)) | ((color & 0x1f) << 3);
}
/** Put pixel - 8-bit depth (color palette/3:2:3)
*
* Even though we try 3:2:3 color scheme here, an 8-bit framebuffer
* will most likely use a color palette. The color appearance
* will be pretty random and depend on the default installed
* palette. This could be fixed by supporting custom palette
* and setting it to simulate the 8-bit truecolor.
*/
static void rgb_byte8(void *dst, int rgb)
{
*((uint8_t *) dst) = RED(rgb, 3) << 5 | GREEN(rgb, 2) << 3 | BLUE(rgb, 3);
}
/** Return pixel color - 8-bit depth (color palette/3:2:3)
*
* See the comment for rgb_byte().
*/
static int byte8_rgb(void *src)
{
int color = *(uint8_t *)src;
return (((color >> 5) & 0x7) << (16 + 5)) | (((color >> 3) & 0x3) << (8 + 6)) | ((color & 0x7) << 5);
}
static void putpixel(unsigned int x, unsigned int y, int color)
{
(*rgb2scr)(&fbaddress[POINTPOS(x, y)], COLOR(color));
if (dbbuffer) {
int dline = (y + dboffset) % yres;
(*rgb2scr)(&dbbuffer[POINTPOS(x, dline)], COLOR(color));
}
}
/** Get pixel from viewport */
static int getpixel(unsigned int x, unsigned int y)
{
if (dbbuffer) {
int dline = (y + dboffset) % yres;
return COLOR((*scr2rgb)(&dbbuffer[POINTPOS(x, dline)]));
}
return COLOR((*scr2rgb)(&fbaddress[POINTPOS(x, y)]));
}
/** Fill screen with background color */
static void clear_screen(void)
{
unsigned int y;
for (y = 0; y < yres; y++) {
memcpy(&fbaddress[scanline * y], blankline, xres * pixelbytes);
if (dbbuffer)
memcpy(&dbbuffer[scanline * y], blankline, xres * pixelbytes);
}
}
/** Scroll screen one row up */
static void scroll_screen(void)
{
uint8_t *lastline = &fbaddress[(rows - 1) * ROW_BYTES];
int firstsz;
if (dbbuffer) {
memcpy(&dbbuffer[dboffset * scanline], blankline, ROW_BYTES);
dboffset = (dboffset + FONT_SCANLINES) % yres;
firstsz = yres - dboffset;
memcpy(fbaddress, &dbbuffer[scanline * dboffset], firstsz * scanline);
memcpy(&fbaddress[firstsz * scanline], dbbuffer, dboffset * scanline);
} else {
memcpy((void *) fbaddress, (void *) &fbaddress[ROW_BYTES], scanline * yres - ROW_BYTES);
/* Clear last row */
memcpy((void *) lastline, (void *) blankline, ROW_BYTES);
}
}
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(uint8_t 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, COLOR(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) && position < columns * rows);
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 Physical address of the framebuffer
* @param x Screen width in pixels
* @param y Screen height in pixels
* @param scan Bytes per one scanline
* @param visual Color model
*
*/
void fb_init(uintptr_t addr, unsigned int x, unsigned int y, unsigned int scan, unsigned int visual)
{
switch (visual) {
case VISUAL_INDIRECT_8:
rgb2scr = rgb_byte8;
scr2rgb = byte8_rgb;
pixelbytes = 1;
break;
case VISUAL_RGB_5_5_5:
rgb2scr = rgb_byte555;
scr2rgb = byte555_rgb;
pixelbytes = 2;
break;
case VISUAL_RGB_5_6_5:
rgb2scr = rgb_byte565;
scr2rgb = byte565_rgb;
pixelbytes = 2;
break;
case VISUAL_RGB_8_8_8:
rgb2scr = rgb_byte888;
scr2rgb = byte888_rgb;
pixelbytes = 3;
break;
case VISUAL_RGB_8_8_8_0:
rgb2scr = rgb_byte888;
scr2rgb = byte888_rgb;
pixelbytes = 4;
break;
case VISUAL_RGB_0_8_8_8:
rgb2scr = rgb_byte0888;
scr2rgb = byte0888_rgb;
pixelbytes = 4;
break;
default:
panic("Unsupported visual.\n");
}
unsigned int fbsize = scan * y;
/* Map the framebuffer */
fbaddress = (uint8_t *) hw_map((uintptr_t) addr, fbsize);
xres = x;
yres = y;
scanline = scan;
rows = y / FONT_SCANLINES;
columns = x / COL_WIDTH;
sysinfo_set_item_val("fb", NULL, true);
sysinfo_set_item_val("fb.kind", NULL, 1);
sysinfo_set_item_val("fb.width", NULL, xres);
sysinfo_set_item_val("fb.height", NULL, yres);
sysinfo_set_item_val("fb.scanline", NULL, scan);
sysinfo_set_item_val("fb.visual", NULL, visual);
sysinfo_set_item_val("fb.address.physical", NULL, addr);
sysinfo_set_item_val("fb.invert-colors", NULL, invert_colors);
/* Allocate double buffer */
unsigned int order = fnzb(SIZE2FRAMES(ALIGN_UP(fbsize, FRAME_SIZE))) + 1;
dbbuffer = (uint8_t * ) frame_alloc(order, FRAME_ATOMIC | FRAME_KA);
if (!dbbuffer)
printf("Failed to allocate scroll buffer.\n");
dboffset = 0;
/* Initialized blank line */
blankline = (uint8_t *) malloc(ROW_BYTES, FRAME_ATOMIC);
if (!blankline)
panic("Failed to allocate blank line for framebuffer.");
for (y = 0; y < FONT_SCANLINES; y++)
for (x = 0; x < xres; x++)
(*rgb2scr)(&blankline[POINTPOS(x, y)], COLOR(BGCOLOR));
clear_screen();
/* Update size of screen to match text area */
yres = rows * FONT_SCANLINES;
draw_logo(xres - helenos_width, 0);
invert_cursor();
chardev_initialize("fb", &framebuffer, &fb_ops);
stdout = &framebuffer;
}
/** @}
*/