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/*
* Copyright (c) 2008 Martin Decky
* Copyright (c) 2006 Jakub Vana
* 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 fb Graphical framebuffer
* @brief HelenOS graphical framebuffer.
* @ingroup fbs
* @{
*/
/** @file
*/
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <ddi.h>
#include <sysinfo.h>
#include <align.h>
#include <as.h>
#include <ipc/fb.h>
#include <ipc/ipc.h>
#include <ipc/ns.h>
#include <ipc/services.h>
#include <kernel/errno.h>
#include <kernel/genarch/fb/visuals.h>
#include <io/color.h>
#include <io/style.h>
#include <async.h>
#include <bool.h>
#include "font-8x16.h"
#include "fb.h"
#include "main.h"
#include "../console/screenbuffer.h"
#include "ppm.h"
#include "pointer.xbm"
#include "pointer_mask.xbm"
#define DEFAULT_BGCOLOR 0xf0f0f0
#define DEFAULT_FGCOLOR 0x000000
#define GLYPH_UNAVAIL '?'
#define MAX_ANIM_LEN 8
#define MAX_ANIMATIONS 4
#define MAX_PIXMAPS 256 /**< Maximum number of saved pixmaps */
#define MAX_VIEWPORTS 128 /**< Viewport is a rectangular area on the screen */
/** Function to render a pixel from a RGB value. */
typedef void (*rgb_conv_t)(void *, uint32_t);
/** Function to render a bit mask. */
typedef void (*mask_conv_t)(void *, bool);
/** Function to draw a glyph. */
typedef void (*dg_t)(unsigned int x, unsigned int y, bool cursor,
uint8_t *glyphs, uint32_t glyph, uint32_t fg_color, uint32_t bg_color);
struct {
uint8_t *fb_addr;
unsigned int xres;
unsigned int yres;
unsigned int scanline;
unsigned int glyphscanline;
unsigned int pixelbytes;
unsigned int glyphbytes;
/** Pre-rendered mask for rendering glyphs. Specific for the visual. */
uint8_t *glyphs;
rgb_conv_t rgb_conv;
mask_conv_t mask_conv;
} screen;
/** Backbuffer character cell. */
typedef struct {
uint32_t glyph;
uint32_t fg_color;
uint32_t bg_color;
} bb_cell_t;
typedef struct {
bool initialized;
unsigned int x;
unsigned int y;
unsigned int width;
unsigned int height;
/* Text support in window */
unsigned int cols;
unsigned int rows;
/*
* Style and glyphs for text printing
*/
/** Current attributes. */
attr_rgb_t attr;
uint8_t *bgpixel;
/**
* Glyph drawing function for this viewport. Different viewports
* might use different drawing functions depending on whether their
* scanlines are aligned on a word boundary.
*/
dg_t dglyph;
/* Auto-cursor position */
bool cursor_active;
unsigned int cur_col;
unsigned int cur_row;
bool cursor_shown;
/* Back buffer */
bb_cell_t *backbuf;
unsigned int bbsize;
} viewport_t;
typedef struct {
bool initialized;
bool enabled;
unsigned int vp;
unsigned int pos;
unsigned int animlen;
unsigned int pixmaps[MAX_ANIM_LEN];
} animation_t;
static animation_t animations[MAX_ANIMATIONS];
static bool anims_enabled;
typedef struct {
unsigned int width;
unsigned int height;
uint8_t *data;
} pixmap_t;
static pixmap_t pixmaps[MAX_PIXMAPS];
static viewport_t viewports[128];
static bool client_connected = false; /**< Allow only 1 connection */
static uint32_t color_table[16] = {
[COLOR_BLACK] = 0x000000,
[COLOR_BLUE] = 0x0000f0,
[COLOR_GREEN] = 0x00f000,
[COLOR_CYAN] = 0x00f0f0,
[COLOR_RED] = 0xf00000,
[COLOR_MAGENTA] = 0xf000f0,
[COLOR_YELLOW] = 0xf0f000,
[COLOR_WHITE] = 0xf0f0f0,
[8 + COLOR_BLACK] = 0x000000,
[8 + COLOR_BLUE] = 0x0000ff,
[8 + COLOR_GREEN] = 0x00ff00,
[8 + COLOR_CYAN] = 0x00ffff,
[8 + COLOR_RED] = 0xff0000,
[8 + COLOR_MAGENTA] = 0xff00ff,
[8 + COLOR_YELLOW] = 0xffff00,
[8 + COLOR_WHITE] = 0xffffff,
};
static int rgb_from_attr(attr_rgb_t *rgb, const attrs_t *a);
static int rgb_from_style(attr_rgb_t *rgb, int style);
static int rgb_from_idx(attr_rgb_t *rgb, ipcarg_t fg_color,
ipcarg_t bg_color, ipcarg_t flags);
static int fb_set_color(viewport_t *vport, ipcarg_t fg_color,
ipcarg_t bg_color, ipcarg_t attr);
static void draw_glyph_aligned(unsigned int x, unsigned int y, bool cursor,
uint8_t *glyphs, uint32_t glyph, uint32_t fg_color, uint32_t bg_color);
static void draw_glyph_fallback(unsigned int x, unsigned int y, bool cursor,
uint8_t *glyphs, uint32_t glyph, uint32_t fg_color, uint32_t bg_color);
static void draw_vp_glyph(viewport_t *vport, bool cursor, unsigned int col,
unsigned int row);
#define RED(x, bits) ((x >> (8 + 8 + 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 COL2X(col) ((col) * FONT_WIDTH)
#define ROW2Y(row) ((row) * FONT_SCANLINES)
#define X2COL(x) ((x) / FONT_WIDTH)
#define Y2ROW(y) ((y) / FONT_SCANLINES)
#define FB_POS(x, y) ((y) * screen.scanline + (x) * screen.pixelbytes)
#define BB_POS(vport, col, row) ((row) * vport->cols + (col))
#define GLYPH_POS(glyph, y, cursor) (((glyph) + (cursor) * FONT_GLYPHS) * screen.glyphbytes + (y) * screen.glyphscanline)
/** ARGB 8:8:8:8 conversion
*
*/
static void rgb_0888(void *dst, uint32_t rgb)
{
*((uint32_t *) dst) = rgb & 0x00ffffff;
}
static void mask_0888(void *dst, bool mask)
{
*((uint32_t *) dst) = (mask ? 0x00ffffff : 0);
}
/** ABGR 8:8:8:8 conversion
*
*/
static void bgr_0888(void *dst, uint32_t rgb)
{
*((uint32_t *) dst)
= (BLUE(rgb, 8) << 16) | (GREEN(rgb, 8) << 8) | RED(rgb, 8);
}
/** RGB 8:8:8 conversion
*
*/
static void rgb_888(void *dst, uint32_t rgb)
{
((uint8_t *) dst)[0] = BLUE(rgb, 8);
((uint8_t *) dst)[1] = GREEN(rgb, 8);
((uint8_t *) dst)[2] = RED(rgb, 8);
}
static void mask_888(void *dst, bool mask)
{
if (mask) {
((uint8_t *) dst)[0] = 0xff;
((uint8_t *) dst)[1] = 0xff;
((uint8_t *) dst)[2] = 0xff;
} else {
((uint8_t *) dst)[0] = 0;
((uint8_t *) dst)[1] = 0;
((uint8_t *) dst)[2] = 0;
}
}
/** BGR 8:8:8 conversion
*
*/
static void bgr_888(void *dst, uint32_t rgb)
{
((uint8_t *) dst)[0] = RED(rgb, 8);
((uint8_t *) dst)[1] = GREEN(rgb, 8);
((uint8_t *) dst)[2] = BLUE(rgb, 8);
}
/** RGB 5:5:5 conversion
*
*/
static void rgb_555(void *dst, uint32_t rgb)
{
*((uint16_t *) dst)
= (RED(rgb, 5) << 10) | (GREEN(rgb, 5) << 5) | BLUE(rgb, 5);
}
static void mask_555(void *dst, bool mask)
{
*((uint16_t *) dst) = (mask ? 0x7fff : 0);
}
/** RGB 5:6:5 conversion
*
*/
static void rgb_565(void *dst, uint32_t rgb)
{
*((uint16_t *) dst)
= (RED(rgb, 5) << 11) | (GREEN(rgb, 6) << 5) | BLUE(rgb, 5);
}
static void mask_565(void *dst, bool mask)
{
*((uint16_t *) dst) = (mask ? 0xffff : 0);
}
/** RGB 3:2:3
*
*/
static void rgb_323(void *dst, uint32_t rgb)
{
*((uint8_t *) dst)
= ~((RED(rgb, 3) << 5) | (GREEN(rgb, 2) << 3) | BLUE(rgb, 3));
}
static void mask_323(void *dst, bool mask)
{
*((uint8_t *) dst) = (mask ? 0xff : 0);
}
/** Draw a filled rectangle.
*
* @note Need real implementation that does not access VRAM twice.
*
*/
static void draw_filled_rect(unsigned int x0, unsigned int y0, unsigned int x1,
unsigned int y1, uint32_t color)
{
unsigned int x;
unsigned int y;
unsigned int copy_bytes;
uint8_t *sp;
uint8_t *dp;
uint8_t cbuf[4];
if ((y0 >= y1) || (x0 >= x1))
return;
screen.rgb_conv(cbuf, color);
sp = &screen.fb_addr[FB_POS(x0, y0)];
dp = sp;
/* Draw the first line. */
for (x = x0; x < x1; x++) {
memcpy(dp, cbuf, screen.pixelbytes);
dp += screen.pixelbytes;
}
dp = sp + screen.scanline;
copy_bytes = (x1 - x0) * screen.pixelbytes;
/* Draw the remaining lines by copying. */
for (y = y0 + 1; y < y1; y++) {
memcpy(dp, sp, copy_bytes);
dp += screen.scanline;
}
}
/** Redraw viewport.
*
* @param vport Viewport to redraw
*
*/
static void vport_redraw(viewport_t *vport)
{
unsigned int col;
unsigned int row;
for (row = 0; row < vport->rows; row++) {
for (col = 0; col < vport->cols; col++) {
draw_vp_glyph(vport, false, col, row);
}
}
if (COL2X(vport->cols) < vport->width) {
draw_filled_rect(
vport->x + COL2X(vport->cols), vport->y,
vport->x + vport->width, vport->y + vport->height,
vport->attr.bg_color);
}
if (ROW2Y(vport->rows) < vport->height) {
draw_filled_rect(
vport->x, vport->y + ROW2Y(vport->rows),
vport->x + vport->width, vport->y + vport->height,
vport->attr.bg_color);
}
}
static void backbuf_clear(bb_cell_t *backbuf, size_t len, uint32_t fg_color,
uint32_t bg_color)
{
size_t i;
for (i = 0; i < len; i++) {
backbuf[i].glyph = 0;
backbuf[i].fg_color = fg_color;
backbuf[i].bg_color = bg_color;
}
}
/** Clear viewport.
*
* @param vport Viewport to clear
*
*/
static void vport_clear(viewport_t *vport)
{
backbuf_clear(vport->backbuf, vport->cols * vport->rows,
vport->attr.fg_color, vport->attr.bg_color);
vport_redraw(vport);
}
/** Scroll viewport by the specified number of lines.
*
* @param vport Viewport to scroll
* @param lines Number of lines to scroll
*
*/
static void vport_scroll(viewport_t *vport, int lines)
{
unsigned int col;
unsigned int row;
unsigned int x;
unsigned int y;
uint32_t glyph;
uint32_t fg_color;
uint32_t bg_color;
bb_cell_t *bbp;
bb_cell_t *xbp;
/*
* Redraw.
*/
y = vport->y;
for (row = 0; row < vport->rows; row++) {
x = vport->x;
for (col = 0; col < vport->cols; col++) {
if ((row + lines >= 0) && (row + lines < vport->rows)) {
xbp = &vport->backbuf[BB_POS(vport, col, row + lines)];
bbp = &vport->backbuf[BB_POS(vport, col, row)];
glyph = xbp->glyph;
fg_color = xbp->fg_color;
bg_color = xbp->bg_color;
if ((bbp->glyph == glyph)
&& (bbp->fg_color == xbp->fg_color)
&& (bbp->bg_color == xbp->bg_color)) {
x += FONT_WIDTH;
continue;
}
} else {
glyph = 0;
fg_color = vport->attr.fg_color;
bg_color = vport->attr.bg_color;
}
(*vport->dglyph)(x, y, false, screen.glyphs, glyph,
fg_color, bg_color);
x += FONT_WIDTH;
}
y += FONT_SCANLINES;
}
/*
* Scroll backbuffer.
*/
if (lines > 0) {
memmove(vport->backbuf, vport->backbuf + vport->cols * lines,
vport->cols * (vport->rows - lines) * sizeof(bb_cell_t));
backbuf_clear(&vport->backbuf[BB_POS(vport, 0, vport->rows - lines)],
vport->cols * lines, vport->attr.fg_color, vport->attr.bg_color);
} else {
memmove(vport->backbuf - vport->cols * lines, vport->backbuf,
vport->cols * (vport->rows + lines) * sizeof(bb_cell_t));
backbuf_clear(vport->backbuf, - vport->cols * lines,
vport->attr.fg_color, vport->attr.bg_color);
}
}
/** Render glyphs
*
* Convert glyphs from device independent font
* description to current visual representation.
*
*/
static void render_glyphs(void)
{
unsigned int glyph;
for (glyph = 0; glyph < FONT_GLYPHS; glyph++) {
unsigned int y;
for (y = 0; y < FONT_SCANLINES; y++) {
unsigned int x;
for (x = 0; x < FONT_WIDTH; x++) {
screen.mask_conv(&screen.glyphs[GLYPH_POS(glyph, y, false) + x * screen.pixelbytes],
(fb_font[glyph][y] & (1 << (7 - x))) ? true : false);
screen.mask_conv(&screen.glyphs[GLYPH_POS(glyph, y, true) + x * screen.pixelbytes],
(fb_font[glyph][y] & (1 << (7 - x))) ? false : true);
}
}
}
}
/** Create new viewport
*
* @param x Origin of the viewport (x).
* @param y Origin of the viewport (y).
* @param width Width of the viewport.
* @param height Height of the viewport.
*
* @return New viewport number.
*
*/
static int vport_create(unsigned int x, unsigned int y,
unsigned int width, unsigned int height)
{
unsigned int i;
for (i = 0; i < MAX_VIEWPORTS; i++) {
if (!viewports[i].initialized)
break;
}
if (i == MAX_VIEWPORTS)
return ELIMIT;
unsigned int cols = width / FONT_WIDTH;
unsigned int rows = height / FONT_SCANLINES;
unsigned int bbsize = cols * rows * sizeof(bb_cell_t);
unsigned int word_size = sizeof(unsigned long);
bb_cell_t *backbuf = (bb_cell_t *) malloc(bbsize);
if (!backbuf)
return ENOMEM;
uint8_t *bgpixel = (uint8_t *) malloc(screen.pixelbytes);
if (!bgpixel) {
free(backbuf);
return ENOMEM;
}
backbuf_clear(backbuf, cols * rows, DEFAULT_FGCOLOR, DEFAULT_BGCOLOR);
memset(bgpixel, 0, screen.pixelbytes);
viewports[i].x = x;
viewports[i].y = y;
viewports[i].width = width;
viewports[i].height = height;
viewports[i].cols = cols;
viewports[i].rows = rows;
viewports[i].attr.bg_color = DEFAULT_BGCOLOR;
viewports[i].attr.fg_color = DEFAULT_FGCOLOR;
viewports[i].bgpixel = bgpixel;
/*
* Conditions necessary to select aligned version:
* - word size is divisible by pixelbytes
* - cell scanline size is divisible by word size
* - cell scanlines are word-aligned
*
*/
if (((word_size % screen.pixelbytes) == 0)
&& ((FONT_WIDTH * screen.pixelbytes) % word_size == 0)
&& ((x * screen.pixelbytes) % word_size == 0)
&& (screen.scanline % word_size == 0)) {
viewports[i].dglyph = draw_glyph_aligned;
} else {
viewports[i].dglyph = draw_glyph_fallback;
}
viewports[i].cur_col = 0;
viewports[i].cur_row = 0;
viewports[i].cursor_active = false;
viewports[i].cursor_shown = false;
viewports[i].bbsize = bbsize;
viewports[i].backbuf = backbuf;
viewports[i].initialized = true;
screen.rgb_conv(viewports[i].bgpixel, viewports[i].attr.bg_color);
return i;
}
/** Initialize framebuffer as a chardev output device
*
* @param addr Address of the framebuffer
* @param xres Screen width in pixels
* @param yres Screen height in pixels
* @param visual Bits per pixel (8, 16, 24, 32)
* @param scan Bytes per one scanline
*
*/
static bool screen_init(void *addr, unsigned int xres, unsigned int yres,
unsigned int scan, unsigned int visual)
{
switch (visual) {
case VISUAL_INDIRECT_8:
screen.rgb_conv = rgb_323;
screen.mask_conv = mask_323;
screen.pixelbytes = 1;
break;
case VISUAL_RGB_5_5_5:
screen.rgb_conv = rgb_555;
screen.mask_conv = mask_555;
screen.pixelbytes = 2;
break;
case VISUAL_RGB_5_6_5:
screen.rgb_conv = rgb_565;
screen.mask_conv = mask_565;
screen.pixelbytes = 2;
break;
case VISUAL_RGB_8_8_8:
screen.rgb_conv = rgb_888;
screen.mask_conv = mask_888;
screen.pixelbytes = 3;
break;
case VISUAL_BGR_8_8_8:
screen.rgb_conv = bgr_888;
screen.mask_conv = mask_888;
screen.pixelbytes = 3;
break;
case VISUAL_RGB_8_8_8_0:
screen.rgb_conv = rgb_888;
screen.mask_conv = mask_888;
screen.pixelbytes = 4;
break;
case VISUAL_RGB_0_8_8_8:
screen.rgb_conv = rgb_0888;
screen.mask_conv = mask_0888;
screen.pixelbytes = 4;
break;
case VISUAL_BGR_0_8_8_8:
screen.rgb_conv = bgr_0888;
screen.mask_conv = mask_0888;
screen.pixelbytes = 4;
break;
default:
return false;
}
screen.fb_addr = (unsigned char *) addr;
screen.xres = xres;
screen.yres = yres;
screen.scanline = scan;
screen.glyphscanline = FONT_WIDTH * screen.pixelbytes;
screen.glyphbytes = screen.glyphscanline * FONT_SCANLINES;
size_t glyphsize = 2 * FONT_GLYPHS * screen.glyphbytes;
uint8_t *glyphs = (uint8_t *) malloc(glyphsize);
if (!glyphs)
return false;
memset(glyphs, 0, glyphsize);
screen.glyphs = glyphs;
render_glyphs();
/* Create first viewport */
vport_create(0, 0, xres, yres);
return true;
}
/** Draw a glyph, takes advantage of alignment.
*
* This version can only be used if the following conditions are met:
*
* - word size is divisible by pixelbytes
* - cell scanline size is divisible by word size
* - cell scanlines are word-aligned
*
* It makes use of the pre-rendered mask to process (possibly) several
* pixels at once (word size / pixelbytes pixels at a time are processed)
* making it very fast. Most notably this version is not applicable at 24 bits
* per pixel.
*
* @param x x coordinate of top-left corner on screen.
* @param y y coordinate of top-left corner on screen.
* @param cursor Draw glyph with cursor
* @param glyphs Pointer to font bitmap.
* @param glyph Code of the glyph to draw.
* @param fg_color Foreground color.
* @param bg_color Backgroudn color.
*
*/
static void draw_glyph_aligned(unsigned int x, unsigned int y, bool cursor,
uint8_t *glyphs, uint32_t glyph, uint32_t fg_color, uint32_t bg_color)
{
unsigned int i;
unsigned int yd;
unsigned long fg_buf;
unsigned long bg_buf;
unsigned long mask;
/*
* Prepare a pair of words, one filled with foreground-color
* pattern and the other filled with background-color pattern.
*/
for (i = 0; i < sizeof(unsigned long) / screen.pixelbytes; i++) {
screen.rgb_conv(&((uint8_t *) &fg_buf)[i * screen.pixelbytes],
fg_color);
screen.rgb_conv(&((uint8_t *) &bg_buf)[i * screen.pixelbytes],
bg_color);
}
/* Pointer to the current position in the mask. */
unsigned long *maskp = (unsigned long *) &glyphs[GLYPH_POS(glyph, 0, cursor)];
/* Pointer to the current position on the screen. */
unsigned long *dp = (unsigned long *) &screen.fb_addr[FB_POS(x, y)];
/* Width of the character cell in words. */
unsigned int ww = FONT_WIDTH * screen.pixelbytes / sizeof(unsigned long);
/* Offset to add when moving to another screen scanline. */
unsigned int d_add = screen.scanline - FONT_WIDTH * screen.pixelbytes;
for (yd = 0; yd < FONT_SCANLINES; yd++) {
/*
* Now process the cell scanline, combining foreground
* and background color patters using the pre-rendered mask.
*/
for (i = 0; i < ww; i++) {
mask = *maskp++;
*dp++ = (fg_buf & mask) | (bg_buf & ~mask);
}
/* Move to the beginning of the next scanline of the cell. */
dp = (unsigned long *) ((uint8_t *) dp + d_add);
}
}
/** Draw a glyph, fallback version.
*
* This version does not make use of the pre-rendered mask, it uses
* the font bitmap directly. It works always, but it is slower.
*
* @param x x coordinate of top-left corner on screen.
* @param y y coordinate of top-left corner on screen.
* @param cursor Draw glyph with cursor
* @param glyphs Pointer to font bitmap.
* @param glyph Code of the glyph to draw.
* @param fg_color Foreground color.
* @param bg_color Backgroudn color.
*
*/
void draw_glyph_fallback(unsigned int x, unsigned int y, bool cursor,
uint8_t *glyphs, uint32_t glyph, uint32_t fg_color, uint32_t bg_color)
{
unsigned int i;
unsigned int j;
unsigned int yd;
uint8_t fg_buf[4];
uint8_t bg_buf[4];
uint8_t *sp;
uint8_t b;
/* Pre-render 1x the foreground and background color pixels. */
if (cursor) {
screen.rgb_conv(fg_buf, bg_color);
screen.rgb_conv(bg_buf, fg_color);
} else {
screen.rgb_conv(fg_buf, fg_color);
screen.rgb_conv(bg_buf, bg_color);
}
/* Pointer to the current position on the screen. */
uint8_t *dp = (uint8_t *) &screen.fb_addr[FB_POS(x, y)];
/* Offset to add when moving to another screen scanline. */
unsigned int d_add = screen.scanline - FONT_WIDTH * screen.pixelbytes;
for (yd = 0; yd < FONT_SCANLINES; yd++) {
/* Byte containing bits of the glyph scanline. */
b = fb_font[glyph][yd];
for (i = 0; i < FONT_WIDTH; i++) {
/* Choose color based on the current bit. */
sp = (b & 0x80) ? fg_buf : bg_buf;
/* Copy the pixel. */
for (j = 0; j < screen.pixelbytes; j++) {
*dp++ = *sp++;
}
/* Move to the next bit. */
b = b << 1;
}
/* Move to the beginning of the next scanline of the cell. */
dp += d_add;
}
}
/** Draw glyph at specified position in viewport.
*
* @param vport Viewport identification
* @param cursor Draw glyph with cursor
* @param col Screen position relative to viewport
* @param row Screen position relative to viewport
*
*/
static void draw_vp_glyph(viewport_t *vport, bool cursor, unsigned int col,
unsigned int row)
{
unsigned int x = vport->x + COL2X(col);
unsigned int y = vport->y + ROW2Y(row);
uint32_t glyph = vport->backbuf[BB_POS(vport, col, row)].glyph;
uint32_t fg_color = vport->backbuf[BB_POS(vport, col, row)].fg_color;
uint32_t bg_color = vport->backbuf[BB_POS(vport, col, row)].bg_color;
(*vport->dglyph)(x, y, cursor, screen.glyphs, glyph,
fg_color, bg_color);
}
/** Hide cursor if it is shown
*
*/
static void cursor_hide(viewport_t *vport)
{
if ((vport->cursor_active) && (vport->cursor_shown)) {
draw_vp_glyph(vport, false, vport->cur_col, vport->cur_row);
vport->cursor_shown = false;
}
}
/** Show cursor if cursor showing is enabled
*
*/
static void cursor_show(viewport_t *vport)
{
/* Do not check for cursor_shown */
if (vport->cursor_active) {
draw_vp_glyph(vport, true, vport->cur_col, vport->cur_row);
vport->cursor_shown = true;
}
}
/** Invert cursor, if it is enabled
*
*/
static void cursor_blink(viewport_t *vport)
{
if (vport->cursor_shown)
cursor_hide(vport);
else
cursor_show(vport);
}
/** Draw character at given position relative to viewport
*
* @param vport Viewport identification
* @param c Character to draw
* @param col Screen position relative to viewport
* @param row Screen position relative to viewport
*
*/
static void draw_char(viewport_t *vport, wchar_t c, unsigned int col, unsigned int row)
{
bb_cell_t *bbp;
/* Do not hide cursor if we are going to overwrite it */
if ((vport->cursor_active) && (vport->cursor_shown) &&
((vport->cur_col != col) || (vport->cur_row != row)))
cursor_hide(vport);
bbp = &vport->backbuf[BB_POS(vport, col, row)];
bbp->glyph = fb_font_glyph(c);
bbp->fg_color = vport->attr.fg_color;
bbp->bg_color = vport->attr.bg_color;
draw_vp_glyph(vport, false, col, row);
vport->cur_col = col;
vport->cur_row = row;
vport->cur_col++;
if (vport->cur_col >= vport->cols) {
vport->cur_col = 0;
vport->cur_row++;
if (vport->cur_row >= vport->rows)
vport->cur_row--;
}
cursor_show(vport);
}
/** 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(viewport_t *vport, keyfield_t *data, unsigned int x,
unsigned int y, unsigned int w, unsigned int h)
{
unsigned int i;
unsigned int j;
bb_cell_t *bbp;
attrs_t *a;
attr_rgb_t rgb;
for (j = 0; j < h; j++) {
for (i = 0; i < w; i++) {
unsigned int col = x + i;
unsigned int row = y + j;
bbp = &vport->backbuf[BB_POS(vport, col, row)];
a = &data[j * w + i].attrs;
rgb_from_attr(&rgb, a);
bbp->glyph = fb_font_glyph(data[j * w + i].character);
bbp->fg_color = rgb.fg_color;
bbp->bg_color = rgb.bg_color;
draw_vp_glyph(vport, false, col, row);
}
}
cursor_show(vport);
}
static void putpixel_pixmap(void *data, unsigned int x, unsigned int y, uint32_t color)
{
int pm = *((int *) data);
pixmap_t *pmap = &pixmaps[pm];
unsigned int pos = (y * pmap->width + x) * screen.pixelbytes;
screen.rgb_conv(&pmap->data[pos], color);
}
static void putpixel(void *data, unsigned int x, unsigned int y, uint32_t color)
{
viewport_t *vport = (viewport_t *) data;
unsigned int dx = vport->x + x;
unsigned int dy = vport->y + y;
screen.rgb_conv(&screen.fb_addr[FB_POS(dx, dy)], color);
}
/** Return first free pixmap
*
*/
static int find_free_pixmap(void)
{
unsigned int i;
for (i = 0; i < MAX_PIXMAPS; i++)
if (!pixmaps[i].data)
return i;
return -1;
}
/** Create a new pixmap and return appropriate ID
*
*/
static int shm2pixmap(unsigned char *shm, size_t size)
{
int pm;
pixmap_t *pmap;
pm = find_free_pixmap();
if (pm == -1)
return ELIMIT;
pmap = &pixmaps[pm];
if (ppm_get_data(shm, size, &pmap->width, &pmap->height))
return EINVAL;
pmap->data = malloc(pmap->width * pmap->height * screen.pixelbytes);
if (!pmap->data)
return ENOMEM;
ppm_draw(shm, size, 0, 0, pmap->width, pmap->height, putpixel_pixmap, (void *) &pm);
return pm;
}
/** Handle shared memory communication calls
*
* Protocol for drawing pixmaps:
* - FB_PREPARE_SHM(client shm identification)
* - IPC_M_AS_AREA_SEND
* - FB_DRAW_PPM(startx, starty)
* - FB_DROP_SHM
*
* Protocol for text drawing
* - IPC_M_AS_AREA_SEND
* - FB_DRAW_TEXT_DATA
*
* @param callid Callid of the current call
* @param call Current call data
* @param vp Active viewport
*
* @return false if the call was not handled byt this function, true otherwise
*
* Note: this function is not threads safe, you would have
* to redefine static variables with __thread
*
*/
static bool shm_handle(ipc_callid_t callid, ipc_call_t *call, int vp)
{
static keyfield_t *interbuffer = NULL;
static size_t intersize = 0;
static unsigned char *shm = NULL;
static ipcarg_t shm_id = 0;
static size_t shm_size;
bool handled = true;
int retval = EOK;
viewport_t *vport = &viewports[vp];
unsigned int x;
unsigned int y;
unsigned int w;
unsigned int h;
switch (IPC_GET_METHOD(*call)) {
case IPC_M_SHARE_OUT:
/* We accept one area for data interchange */
if (IPC_GET_ARG1(*call) == shm_id) {
void *dest = as_get_mappable_page(IPC_GET_ARG2(*call));
shm_size = IPC_GET_ARG2(*call);
if (!ipc_answer_1(callid, EOK, (sysarg_t) dest))
shm = dest;
else
shm_id = 0;
if (shm[0] != 'P')
return false;
return true;
} else {
intersize = IPC_GET_ARG2(*call);
receive_comm_area(callid, call, (void *) &interbuffer);
}
return true;
case FB_PREPARE_SHM:
if (shm_id)
retval = EBUSY;
else
shm_id = IPC_GET_ARG1(*call);
break;
case FB_DROP_SHM:
if (shm) {
as_area_destroy(shm);
shm = NULL;
}
shm_id = 0;
break;
case FB_SHM2PIXMAP:
if (!shm) {
retval = EINVAL;
break;
}
retval = shm2pixmap(shm, shm_size);
break;
case FB_DRAW_PPM:
if (!shm) {
retval = EINVAL;
break;
}
x = IPC_GET_ARG1(*call);
y = IPC_GET_ARG2(*call);
if ((x > vport->width) || (y > vport->height)) {
retval = EINVAL;
break;
}
ppm_draw(shm, shm_size, IPC_GET_ARG1(*call),
IPC_GET_ARG2(*call), vport->width - x, vport->height - y, putpixel, (void *) vport);
break;
case FB_DRAW_TEXT_DATA:
x = IPC_GET_ARG1(*call);
y = IPC_GET_ARG2(*call);
w = IPC_GET_ARG3(*call);
h = IPC_GET_ARG4(*call);
if (!interbuffer) {
retval = EINVAL;
break;
}
if (x + w > vport->cols || y + h > vport->rows) {
retval = EINVAL;
break;
}
if (intersize < w * h * sizeof(*interbuffer)) {
retval = EINVAL;
break;
}
draw_text_data(vport, interbuffer, x, y, w, h);
break;
default:
handled = false;
}
if (handled)
ipc_answer_0(callid, retval);
return handled;
}
static void copy_vp_to_pixmap(viewport_t *vport, pixmap_t *pmap)
{
unsigned int width = vport->width;
unsigned int height = vport->height;
if (width + vport->x > screen.xres)
width = screen.xres - vport->x;
if (height + vport->y > screen.yres)
height = screen.yres - vport->y;
unsigned int realwidth = pmap->width <= width ? pmap->width : width;
unsigned int realheight = pmap->height <= height ? pmap->height : height;
unsigned int srcrowsize = vport->width * screen.pixelbytes;
unsigned int realrowsize = realwidth * screen.pixelbytes;
unsigned int y;
for (y = 0; y < realheight; y++) {
unsigned int tmp = (vport->y + y) * screen.scanline + vport->x * screen.pixelbytes;
memcpy(pmap->data + srcrowsize * y, screen.fb_addr + tmp, realrowsize);
}
}
/** Save viewport to pixmap
*
*/
static int save_vp_to_pixmap(viewport_t *vport)
{
int pm;
pixmap_t *pmap;
pm = find_free_pixmap();
if (pm == -1)
return ELIMIT;
pmap = &pixmaps[pm];
pmap->data = malloc(screen.pixelbytes * vport->width * vport->height);
if (!pmap->data)
return ENOMEM;
pmap->width = vport->width;
pmap->height = vport->height;
copy_vp_to_pixmap(vport, pmap);
return pm;
}
/** Draw pixmap on screen
*
* @param vp Viewport to draw on
* @param pm Pixmap identifier
*
*/
static int draw_pixmap(int vp, int pm)
{
pixmap_t *pmap = &pixmaps[pm];
viewport_t *vport = &viewports[vp];
unsigned int width = vport->width;
unsigned int height = vport->height;
if (width + vport->x > screen.xres)
width = screen.xres - vport->x;
if (height + vport->y > screen.yres)
height = screen.yres - vport->y;
if (!pmap->data)
return EINVAL;
unsigned int realwidth = pmap->width <= width ? pmap->width : width;
unsigned int realheight = pmap->height <= height ? pmap->height : height;
unsigned int srcrowsize = vport->width * screen.pixelbytes;
unsigned int realrowsize = realwidth * screen.pixelbytes;
unsigned int y;
for (y = 0; y < realheight; y++) {
unsigned int tmp = (vport->y + y) * screen.scanline + vport->x * screen.pixelbytes;
memcpy(screen.fb_addr + tmp, pmap->data + y * srcrowsize, realrowsize);
}
return EOK;
}
/** Tick animation one step forward
*
*/
static void anims_tick(void)
{
unsigned int i;
static int counts = 0;
/* Limit redrawing */
counts = (counts + 1) % 8;
if (counts)
return;
for (i = 0; i < MAX_ANIMATIONS; i++) {
if ((!animations[i].animlen) || (!animations[i].initialized) ||
(!animations[i].enabled))
continue;
draw_pixmap(animations[i].vp, animations[i].pixmaps[animations[i].pos]);
animations[i].pos = (animations[i].pos + 1) % animations[i].animlen;
}
}
static unsigned int pointer_x;
static unsigned int pointer_y;
static bool pointer_shown, pointer_enabled;
static int pointer_vport = -1;
static int pointer_pixmap = -1;
static void mouse_show(void)
{
int i, j;
int visibility;
int color;
int bytepos;
if ((pointer_shown) || (!pointer_enabled))
return;
/* Save image under the pointer. */
if (pointer_vport == -1) {
pointer_vport = vport_create(pointer_x, pointer_y, pointer_width, pointer_height);
if (pointer_vport < 0)
return;
} else {
viewports[pointer_vport].x = pointer_x;
viewports[pointer_vport].y = pointer_y;
}
if (pointer_pixmap == -1)
pointer_pixmap = save_vp_to_pixmap(&viewports[pointer_vport]);
else
copy_vp_to_pixmap(&viewports[pointer_vport], &pixmaps[pointer_pixmap]);
/* Draw mouse pointer. */
for (i = 0; i < pointer_height; i++)
for (j = 0; j < pointer_width; j++) {
bytepos = i * ((pointer_width - 1) / 8 + 1) + j / 8;
visibility = pointer_mask_bits[bytepos] &
(1 << (j % 8));
if (visibility) {
color = pointer_bits[bytepos] &
(1 << (j % 8)) ? 0 : 0xffffff;
if (pointer_x + j < screen.xres && pointer_y +
i < screen.yres)
putpixel(&viewports[0], pointer_x + j,
pointer_y + i, color);
}
}
pointer_shown = 1;
}
static void mouse_hide(void)
{
/* Restore image under the pointer. */
if (pointer_shown) {
draw_pixmap(pointer_vport, pointer_pixmap);
pointer_shown = 0;
}
}
static void mouse_move(unsigned int x, unsigned int y)
{
mouse_hide();
pointer_x = x;
pointer_y = y;
mouse_show();
}
static int anim_handle(ipc_callid_t callid, ipc_call_t *call, int vp)
{
bool handled = true;
int retval = EOK;
int i, nvp;
int newval;
switch (IPC_GET_METHOD(*call)) {
case FB_ANIM_CREATE:
nvp = IPC_GET_ARG1(*call);
if (nvp == -1)
nvp = vp;
if (nvp >= MAX_VIEWPORTS || nvp < 0 ||
!viewports[nvp].initialized) {
retval = EINVAL;
break;
}
for (i = 0; i < MAX_ANIMATIONS; i++) {
if (!animations[i].initialized)
break;
}
if (i == MAX_ANIMATIONS) {
retval = ELIMIT;
break;
}
animations[i].initialized = 1;
animations[i].animlen = 0;
animations[i].pos = 0;
animations[i].enabled = 0;
animations[i].vp = nvp;
retval = i;
break;
case FB_ANIM_DROP:
i = IPC_GET_ARG1(*call);
if (i >= MAX_ANIMATIONS || i < 0) {
retval = EINVAL;
break;
}
animations[i].initialized = 0;
break;
case FB_ANIM_ADDPIXMAP:
i = IPC_GET_ARG1(*call);
if (i >= MAX_ANIMATIONS || i < 0 ||
!animations[i].initialized) {
retval = EINVAL;
break;
}
if (animations[i].animlen == MAX_ANIM_LEN) {
retval = ELIMIT;
break;
}
newval = IPC_GET_ARG2(*call);
if (newval < 0 || newval > MAX_PIXMAPS ||
!pixmaps[newval].data) {
retval = EINVAL;
break;
}
animations[i].pixmaps[animations[i].animlen++] = newval;
break;
case FB_ANIM_CHGVP:
i = IPC_GET_ARG1(*call);
if (i >= MAX_ANIMATIONS || i < 0) {
retval = EINVAL;
break;
}
nvp = IPC_GET_ARG2(*call);
if (nvp == -1)
nvp = vp;
if (nvp >= MAX_VIEWPORTS || nvp < 0 ||
!viewports[nvp].initialized) {
retval = EINVAL;
break;
}
animations[i].vp = nvp;
break;
case FB_ANIM_START:
case FB_ANIM_STOP:
i = IPC_GET_ARG1(*call);
if (i >= MAX_ANIMATIONS || i < 0) {
retval = EINVAL;
break;
}
newval = (IPC_GET_METHOD(*call) == FB_ANIM_START);
if (newval ^ animations[i].enabled) {
animations[i].enabled = newval;
anims_enabled += newval ? 1 : -1;
}
break;
default:
handled = 0;
}
if (handled)
ipc_answer_0(callid, retval);
return handled;
}
/** Handler for messages concerning pixmap handling
*
*/
static int pixmap_handle(ipc_callid_t callid, ipc_call_t *call, int vp)
{
bool handled = true;
int retval = EOK;
int i, nvp;
switch (IPC_GET_METHOD(*call)) {
case FB_VP_DRAW_PIXMAP:
nvp = IPC_GET_ARG1(*call);
if (nvp == -1)
nvp = vp;
if (nvp < 0 || nvp >= MAX_VIEWPORTS ||
!viewports[nvp].initialized) {
retval = EINVAL;
break;
}
i = IPC_GET_ARG2(*call);
retval = draw_pixmap(nvp, i);
break;
case FB_VP2PIXMAP:
nvp = IPC_GET_ARG1(*call);
if (nvp == -1)
nvp = vp;
if (nvp < 0 || nvp >= MAX_VIEWPORTS ||
!viewports[nvp].initialized)
retval = EINVAL;
else
retval = save_vp_to_pixmap(&viewports[nvp]);
break;
case FB_DROP_PIXMAP:
i = IPC_GET_ARG1(*call);
if (i >= MAX_PIXMAPS) {
retval = EINVAL;
break;
}
if (pixmaps[i].data) {
free(pixmaps[i].data);
pixmaps[i].data = NULL;
}
break;
default:
handled = 0;
}
if (handled)
ipc_answer_0(callid, retval);
return handled;
}
static int rgb_from_style(attr_rgb_t *rgb, int style)
{
switch (style) {
case STYLE_NORMAL:
rgb->fg_color = color_table[COLOR_BLACK];
rgb->bg_color = color_table[COLOR_WHITE];
break;
case STYLE_EMPHASIS:
rgb->fg_color = color_table[COLOR_RED];
rgb->bg_color = color_table[COLOR_WHITE];
break;
default:
return EINVAL;
}
return EOK;
}
static int rgb_from_idx(attr_rgb_t *rgb, ipcarg_t fg_color,
ipcarg_t bg_color, ipcarg_t flags)
{
fg_color = (fg_color & 7) | ((flags & CATTR_BRIGHT) ? 8 : 0);
bg_color = (bg_color & 7) | ((flags & CATTR_BRIGHT) ? 8 : 0);
rgb->fg_color = color_table[fg_color];
rgb->bg_color = color_table[bg_color];
return EOK;
}
static int rgb_from_attr(attr_rgb_t *rgb, const attrs_t *a)
{
int rc;
switch (a->t) {
case at_style:
rc = rgb_from_style(rgb, a->a.s.style);
break;
case at_idx:
rc = rgb_from_idx(rgb, a->a.i.fg_color,
a->a.i.bg_color, a->a.i.flags);
break;
case at_rgb:
*rgb = a->a.r;
rc = EOK;
break;
}
return rc;
}
static int fb_set_style(viewport_t *vport, ipcarg_t style)
{
return rgb_from_style(&vport->attr, (int) style);
}
static int fb_set_color(viewport_t *vport, ipcarg_t fg_color,
ipcarg_t bg_color, ipcarg_t flags)
{
return rgb_from_idx(&vport->attr, fg_color, bg_color, flags);
}
/** Function for handling connections to FB
*
*/
static void fb_client_connection(ipc_callid_t iid, ipc_call_t *icall)
{
unsigned int vp = 0;
viewport_t *vport = &viewports[vp];
if (client_connected) {
ipc_answer_0(iid, ELIMIT);
return;
}
/* Accept connection */
client_connected = true;
ipc_answer_0(iid, EOK);
while (true) {
ipc_callid_t callid;
ipc_call_t call;
int retval;
unsigned int i;
int scroll;
wchar_t ch;
unsigned int col, row;
if ((vport->cursor_active) || (anims_enabled))
callid = async_get_call_timeout(&call, 250000);
else
callid = async_get_call(&call);
mouse_hide();
if (!callid) {
cursor_blink(vport);
anims_tick();
mouse_show();
continue;
}
if (shm_handle(callid, &call, vp))
continue;
if (pixmap_handle(callid, &call, vp))
continue;
if (anim_handle(callid, &call, vp))
continue;
switch (IPC_GET_METHOD(call)) {
case IPC_M_PHONE_HUNGUP:
client_connected = false;
/* Cleanup other viewports */
for (i = 1; i < MAX_VIEWPORTS; i++)
vport->initialized = false;
/* Exit thread */
return;
case FB_PUTCHAR:
ch = IPC_GET_ARG1(call);
col = IPC_GET_ARG2(call);
row = IPC_GET_ARG3(call);
if ((col >= vport->cols) || (row >= vport->rows)) {
retval = EINVAL;
break;
}
ipc_answer_0(callid, EOK);
draw_char(vport, ch, col, row);
/* Message already answered */
continue;
case FB_CLEAR:
vport_clear(vport);
cursor_show(vport);
retval = EOK;
break;
case FB_CURSOR_GOTO:
col = IPC_GET_ARG1(call);
row = IPC_GET_ARG2(call);
if ((col >= vport->cols) || (row >= vport->rows)) {
retval = EINVAL;
break;
}
retval = EOK;
cursor_hide(vport);
vport->cur_col = col;
vport->cur_row = row;
cursor_show(vport);
break;
case FB_CURSOR_VISIBILITY:
cursor_hide(vport);
vport->cursor_active = IPC_GET_ARG1(call);
cursor_show(vport);
retval = EOK;
break;
case FB_GET_CSIZE:
ipc_answer_2(callid, EOK, vport->cols, vport->rows);
continue;
case FB_SCROLL:
scroll = IPC_GET_ARG1(call);
if ((scroll > (int) vport->rows) || (scroll < (-(int) vport->rows))) {
retval = EINVAL;
break;
}
cursor_hide(vport);
vport_scroll(vport, scroll);
cursor_show(vport);
retval = EOK;
break;
case FB_VIEWPORT_SWITCH:
i = IPC_GET_ARG1(call);
if (i >= MAX_VIEWPORTS) {
retval = EINVAL;
break;
}
if (!viewports[i].initialized) {
retval = EADDRNOTAVAIL;
break;
}
cursor_hide(vport);
vp = i;
vport = &viewports[vp];
cursor_show(vport);
retval = EOK;
break;
case FB_VIEWPORT_CREATE:
retval = vport_create(IPC_GET_ARG1(call) >> 16,
IPC_GET_ARG1(call) & 0xffff,
IPC_GET_ARG2(call) >> 16,
IPC_GET_ARG2(call) & 0xffff);
break;
case FB_VIEWPORT_DELETE:
i = IPC_GET_ARG1(call);
if (i >= MAX_VIEWPORTS) {
retval = EINVAL;
break;
}
if (!viewports[i].initialized) {
retval = EADDRNOTAVAIL;
break;
}
viewports[i].initialized = false;
if (viewports[i].bgpixel)
free(viewports[i].bgpixel);
if (viewports[i].backbuf)
free(viewports[i].backbuf);
retval = EOK;
break;
case FB_SET_STYLE:
retval = fb_set_style(vport, IPC_GET_ARG1(call));
break;
case FB_SET_COLOR:
retval = fb_set_color(vport, IPC_GET_ARG1(call),
IPC_GET_ARG2(call), IPC_GET_ARG3(call));
break;
case FB_SET_RGB_COLOR:
vport->attr.fg_color = IPC_GET_ARG1(call);
vport->attr.bg_color = IPC_GET_ARG2(call);
retval = EOK;
break;
case FB_GET_RESOLUTION:
ipc_answer_2(callid, EOK, screen.xres, screen.yres);
continue;
case FB_POINTER_MOVE:
pointer_enabled = true;
mouse_move(IPC_GET_ARG1(call), IPC_GET_ARG2(call));
retval = EOK;
break;
case FB_SCREEN_YIELD:
case FB_SCREEN_RECLAIM:
retval = EOK;
break;
default:
retval = ENOENT;
}
ipc_answer_0(callid, retval);
}
}
/** Initialization of framebuffer
*
*/
int fb_init(void)
{
async_set_client_connection(fb_client_connection);
void *fb_ph_addr = (void *) sysinfo_value("fb.address.physical");
unsigned int fb_offset = sysinfo_value("fb.offset");
unsigned int fb_width = sysinfo_value("fb.width");
unsigned int fb_height = sysinfo_value("fb.height");
unsigned int fb_scanline = sysinfo_value("fb.scanline");
unsigned int fb_visual = sysinfo_value("fb.visual");
unsigned int fbsize = fb_scanline * fb_height;
void *fb_addr = as_get_mappable_page(fbsize);
if (physmem_map(fb_ph_addr + fb_offset, fb_addr,
ALIGN_UP(fbsize, PAGE_SIZE) >> PAGE_WIDTH, AS_AREA_READ | AS_AREA_WRITE) != 0)
return -1;
if (screen_init(fb_addr, fb_width, fb_height, fb_scanline, fb_visual))
return 0;
return -1;
}
/**
* @}
*/