WebSVN – HelenOS – Diff – /trunk/uspace/srv/fb/fb.c


/*
 * 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 <console/color.h>
#include <console/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 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 draw a glyph. */
typedef void (*dg_t)(unsigned int x, unsigned int y, bool cursor,
    uint8_t *glyphs, uint8_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;
   
    rgb_conv_t rgb_conv;
} screen;
 
/** Backbuffer character cell. */
typedef struct {
    uint8_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;
 
    /** Pre-rendered mask for rendering glyphs. Different viewports
     * might use different drawing functions depending on whether their
     * scanlines are aligned on a word boundary.*/
    uint8_t *glyphs;
 
    uint8_t *bgpixel;
 
    /** Glyph drawing function for this viewport. */
    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, uint8_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, uint8_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 & 0xffffff;
}
 
 
/** 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);
}
 
 
/** 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);
}
 
 
/** 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);
}
 
 
/** 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));
}
 
/** 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, y;
    unsigned int copy_bytes;
 
    uint8_t *sp, *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 row, col;
 
    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)
{
    unsigned 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 row, col;
    unsigned int x, y;
    uint8_t glyph;
    uint32_t fg_color;
    uint32_t bg_color;
    bb_cell_t *bbp, *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, vport->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.
 *
 * @param vport Viewport
 *
 */
static void render_glyphs(viewport_t* vport)
{
    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.rgb_conv(&vport->glyphs[GLYPH_POS(glyph, y, false) + x * screen.pixelbytes],
                    (fb_font[glyph * FONT_SCANLINES + y] & (1 << (7 - x)))
                    ? 0xffffff : 0x000000);
               
                screen.rgb_conv(&vport->glyphs[GLYPH_POS(glyph, y, true) + x * screen.pixelbytes],
                    (fb_font[glyph * FONT_SCANLINES + y] & (1 << (7 - x)))
                    ? 0x000000 : 0xffffff);
            }
        }
    }
   
    screen.rgb_conv(vport->bgpixel, vport->attr.bg_color);
}
 
 
/** 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 glyphsize = 2 * FONT_GLYPHS * screen.glyphbytes;
    unsigned int word_size = sizeof(unsigned long);
   
    bb_cell_t *backbuf = (bb_cell_t *) malloc(bbsize);
    if (!backbuf)
        return ENOMEM;
   
    uint8_t *glyphs = (uint8_t *) malloc(glyphsize);
    if (!glyphs) {
        free(backbuf);
        return ENOMEM;
    }
   
    uint8_t *bgpixel = (uint8_t *) malloc(screen.pixelbytes);
    if (!bgpixel) {
        free(glyphs);
        free(backbuf);
        return ENOMEM;
    }
 
    backbuf_clear(backbuf, cols * rows, DEFAULT_FGCOLOR, DEFAULT_BGCOLOR);
    memset(glyphs, 0, glyphsize);
    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].glyphs = glyphs;
    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;
   
    render_glyphs(&viewports[i]);
   
    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.pixelbytes = 1;
        break;
    case VISUAL_RGB_5_5_5:
        screen.rgb_conv = rgb_555;
        screen.pixelbytes = 2;
        break;
    case VISUAL_RGB_5_6_5:
        screen.rgb_conv = rgb_565;
        screen.pixelbytes = 2;
        break;
    case VISUAL_RGB_8_8_8:
        screen.rgb_conv = rgb_888;
        screen.pixelbytes = 3;
        break;
    case VISUAL_BGR_8_8_8:
        screen.rgb_conv = bgr_888;
        screen.pixelbytes = 3;
        break;
    case VISUAL_RGB_8_8_8_0:
        screen.rgb_conv = rgb_888;
        screen.pixelbytes = 4;
        break;
    case VISUAL_RGB_0_8_8_8:
        screen.rgb_conv = rgb_0888;
        screen.pixelbytes = 4;
        break;
    case VISUAL_BGR_0_8_8_8:
        screen.rgb_conv = bgr_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;
   
    /* 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, uint8_t glyph, uint32_t fg_color, uint32_t bg_color)
{
    unsigned int i, yd;
    unsigned long fg_buf, bg_buf;
    unsigned long *maskp, *dp;
    unsigned long mask;
    unsigned int ww, d_add;
 
    /*
     * 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. */
    maskp = (unsigned long *) &glyphs[GLYPH_POS(glyph, 0, cursor)];
 
    /* Pointer to the current position on the screen. */
    dp = (unsigned long *) &screen.fb_addr[FB_POS(x, y)];
 
    /* Width of the character cell in words. */
    ww = FONT_WIDTH * screen.pixelbytes / sizeof(unsigned long);
 
    /* Offset to add when moving to another screen scanline. */
    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, uint8_t glyph, uint32_t fg_color, uint32_t bg_color)
{
    unsigned int i, j, yd;
    uint8_t fg_buf[4], bg_buf[4];
    uint8_t *dp, *sp;
    unsigned int d_add;
    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. */
    dp = (uint8_t *) &screen.fb_addr[FB_POS(x, y)];
 
    /* Offset to add when moving to another screen scanline. */
    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 * FONT_SCANLINES + 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);
 
    uint8_t glyph;
    uint32_t fg_color;
    uint32_t bg_color;
   
    glyph = vport->backbuf[BB_POS(vport, col, row)].glyph;
    fg_color = vport->backbuf[BB_POS(vport, col, row)].fg_color;
    bg_color = vport->backbuf[BB_POS(vport, col, row)].bg_color;
 
    (*vport->dglyph)(x, y, cursor, vport->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, uint8_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 = 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 fitting exactly into viewport
 *
 */
static void draw_text_data(viewport_t *vport, keyfield_t *data)
{
    unsigned int i;
    bb_cell_t *bbp;
    attrs_t *a;
    attr_rgb_t rgb;
   
    for (i = 0; i < vport->cols * vport->rows; i++) {
        unsigned int col = i % vport->cols;
        unsigned int row = i / vport->cols;
       
        bbp = &vport->backbuf[BB_POS(vport, col, row)];
        uint8_t glyph = bbp->glyph;
 
        a = &data[i].attrs;
        rgb_from_attr(&rgb, a);
 
        bbp->glyph = data[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;
   
    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:
        if (!interbuffer) {
            retval = EINVAL;
            break;
        }
        if (intersize < vport->cols * vport->rows * sizeof(*interbuffer)) {
            retval = EINVAL;
            break;
        }
        draw_text_data(vport, interbuffer);
        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);
}
 
#define FB_WRITE_BUF_SIZE 256
static char fb_write_buf[FB_WRITE_BUF_SIZE];
 
static void fb_write(viewport_t *vport, ipc_callid_t rid, ipc_call_t *request)
{
    int row, col;
    ipc_callid_t callid;
    size_t len;
    size_t i;
 
    row = IPC_GET_ARG1(*request);
    col = IPC_GET_ARG2(*request);
 
    if ((col >= vport->cols) || (row >= vport->rows)) {
        ipc_answer_0(callid, EINVAL);
        ipc_answer_0(rid, EINVAL);
        return;
    }
 
    if (!ipc_data_write_receive(&callid, &len)) {
        ipc_answer_0(callid, EINVAL);
        ipc_answer_0(rid, EINVAL);
        return;
    }
 
    if (len > FB_WRITE_BUF_SIZE)
        len = FB_WRITE_BUF_SIZE;
    if (len >= vport->cols - col)
        len = vport->cols - col;
 
    (void) ipc_data_write_finalize(callid, fb_write_buf, len);
 
    for (i = 0; i < len; i++) {
        draw_char(vport, fb_write_buf[i], col++, row);
    }
 
    ipc_answer_1(rid, EOK, len);
}
 
 
/** 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;
        uint8_t glyph;
        unsigned int row, col;
       
        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:
            glyph = IPC_GET_ARG1(call);
            row = IPC_GET_ARG2(call);
            col = IPC_GET_ARG3(call);
           
            if ((col >= vport->cols) || (row >= vport->rows)) {
                retval = EINVAL;
                break;
            }
            ipc_answer_0(callid, EOK);
           
            draw_char(vport, glyph, col, row);
           
            /* Message already answered */
            continue;
        case FB_WRITE:
            fb_write(vport, callid, &call);
           
            /* Message already answered */
            continue;
        case FB_CLEAR:
            vport_clear(vport);
            cursor_show(vport);
            retval = EOK;
            break;
        case FB_CURSOR_GOTO:
            row = IPC_GET_ARG1(call);
            col = 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->rows, vport->cols);
            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].glyphs)
                free(viewports[i].glyphs);
            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;
        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;
}
 
/**
 * @}
 */
 

Rev 3908	Rev 4164
1	/*	1	/*
2	* Copyright (c) 2008 Martin Decky	2	* Copyright (c) 2008 Martin Decky
3	* Copyright (c) 2006 Jakub Vana	3	* Copyright (c) 2006 Jakub Vana
4	* Copyright (c) 2006 Ondrej Palkovsky	4	* Copyright (c) 2006 Ondrej Palkovsky
5	* All rights reserved.	5	* All rights reserved.
6	*	6	*
7	* Redistribution and use in source and binary forms, with or without	7	* Redistribution and use in source and binary forms, with or without
8	* modification, are permitted provided that the following conditions	8	* modification, are permitted provided that the following conditions
9	* are met:	9	* are met:
10	*	10	*
11	* - Redistributions of source code must retain the above copyright	11	* - Redistributions of source code must retain the above copyright
12	* notice, this list of conditions and the following disclaimer.	12	* notice, this list of conditions and the following disclaimer.
13	* - Redistributions in binary form must reproduce the above copyright	13	* - Redistributions in binary form must reproduce the above copyright
14	* notice, this list of conditions and the following disclaimer in the	14	* notice, this list of conditions and the following disclaimer in the
15	* documentation and/or other materials provided with the distribution.	15	* documentation and/or other materials provided with the distribution.
16	* - The name of the author may not be used to endorse or promote products	16	* - The name of the author may not be used to endorse or promote products
17	* derived from this software without specific prior written permission.	17	* derived from this software without specific prior written permission.
18	*	18	*
19	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR	19	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
20	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES	20	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
21	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.	21	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
22	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,	22	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
23	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT	23	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
24	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,	24	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	25	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	26	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF	27	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
28	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	28	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29	*/	29	*/
30		30
31	/**	31	/**
32	* @defgroup fb Graphical framebuffer	32	* @defgroup fb Graphical framebuffer
33	* @brief HelenOS graphical framebuffer.	33	* @brief HelenOS graphical framebuffer.
34	* @ingroup fbs	34	* @ingroup fbs
35	* @{	35	* @{
36	*/	36	*/
37		37
38	/** @file	38	/** @file
39	*/	39	*/
40		40
41	#include <stdlib.h>	41	#include <stdlib.h>
42	#include <unistd.h>	42	#include <unistd.h>
43	#include <string.h>	43	#include <string.h>
44	#include <ddi.h>	44	#include <ddi.h>
45	#include <sysinfo.h>	45	#include <sysinfo.h>
46	#include <align.h>	46	#include <align.h>
47	#include <as.h>	47	#include <as.h>
48	#include <ipc/fb.h>	48	#include <ipc/fb.h>
49	#include <ipc/ipc.h>	49	#include <ipc/ipc.h>
50	#include <ipc/ns.h>	50	#include <ipc/ns.h>
51	#include <ipc/services.h>	51	#include <ipc/services.h>
52	#include <kernel/errno.h>	52	#include <kernel/errno.h>
53	#include <kernel/genarch/fb/visuals.h>	53	#include <kernel/genarch/fb/visuals.h>
54	#include <console/color.h>	54	#include <console/color.h>
55	#include <console/style.h>	55	#include <console/style.h>
56	#include <async.h>	56	#include <async.h>
57	#include <bool.h>	57	#include <bool.h>
58		58
59	#include "font-8x16.h"	59	#include "font-8x16.h"
60	#include "fb.h"	60	#include "fb.h"
61	#include "main.h"	61	#include "main.h"
62	#include "../console/screenbuffer.h"	62	#include "../console/screenbuffer.h"
63	#include "ppm.h"	63	#include "ppm.h"
64		64
65	#include "pointer.xbm"	65	#include "pointer.xbm"
66	#include "pointer_mask.xbm"	66	#include "pointer_mask.xbm"
67		67
68	#define DEFAULT_BGCOLOR 0xf0f0f0	68	#define DEFAULT_BGCOLOR 0xf0f0f0
69	#define DEFAULT_FGCOLOR 0x000000	69	#define DEFAULT_FGCOLOR 0x000000
70		70
71	#define MAX_ANIM_LEN 8	71	#define MAX_ANIM_LEN 8
72	#define MAX_ANIMATIONS 4	72	#define MAX_ANIMATIONS 4
73	#define MAX_PIXMAPS 256 /*< Maximum number of saved pixmaps /	73	#define MAX_PIXMAPS 256 /*< Maximum number of saved pixmaps /
74	#define MAX_VIEWPORTS 128 /*< Viewport is a rectangular area on the screen /	74	#define MAX_VIEWPORTS 128 /*< Viewport is a rectangular area on the screen /
75		75
76	/** Function to render a pixel from a RGB value. */	76	/** Function to render a pixel from a RGB value. */
77	typedef void (rgb_conv_t)(void , uint32_t);	77	typedef void (rgb_conv_t)(void , uint32_t);
78		78
79	/** Function to draw a glyph. */	79	/** Function to draw a glyph. */
80	typedef void (*dg_t)(unsigned int x, unsigned int y, bool cursor,	80	typedef void (*dg_t)(unsigned int x, unsigned int y, bool cursor,
81	uint8_t *glyphs, uint8_t glyph, uint32_t fg_color, uint32_t bg_color);	81	uint8_t *glyphs, uint8_t glyph, uint32_t fg_color, uint32_t bg_color);
82		82
83	struct {	83	struct {
84	uint8_t *fb_addr;	84	uint8_t *fb_addr;
85		85
86	unsigned int xres;	86	unsigned int xres;
87	unsigned int yres;	87	unsigned int yres;
88		88
89	unsigned int scanline;	89	unsigned int scanline;
90	unsigned int glyphscanline;	90	unsigned int glyphscanline;
91		91
92	unsigned int pixelbytes;	92	unsigned int pixelbytes;
93	unsigned int glyphbytes;	93	unsigned int glyphbytes;
94		94
95	rgb_conv_t rgb_conv;	95	rgb_conv_t rgb_conv;
96	} screen;	96	} screen;
97		97
98	/** Backbuffer character cell. */	98	/** Backbuffer character cell. */
99	typedef struct {	99	typedef struct {
100	uint8_t glyph;	100	uint8_t glyph;
101	uint32_t fg_color;	101	uint32_t fg_color;
102	uint32_t bg_color;	102	uint32_t bg_color;
103	} bb_cell_t;	103	} bb_cell_t;
104		104
105	typedef struct {	105	typedef struct {
106	bool initialized;	106	bool initialized;
107	unsigned int x;	107	unsigned int x;
108	unsigned int y;	108	unsigned int y;
109	unsigned int width;	109	unsigned int width;
110	unsigned int height;	110	unsigned int height;
111		111
112	/* Text support in window */	112	/* Text support in window */
113	unsigned int cols;	113	unsigned int cols;
114	unsigned int rows;	114	unsigned int rows;
115		115
116	/*	116	/*
117	* Style and glyphs for text printing	117	* Style and glyphs for text printing
118	*/	118	*/
119		119
120	/** Current attributes. */	120	/** Current attributes. */
121	attr_rgb_t attr;	121	attr_rgb_t attr;
122		122
123	/** Pre-rendered mask for rendering glyphs. Different viewports	123	/** Pre-rendered mask for rendering glyphs. Different viewports
124	* might use different drawing functions depending on whether their	124	* might use different drawing functions depending on whether their
125	* scanlines are aligned on a word boundary.*/	125	* scanlines are aligned on a word boundary.*/
126	uint8_t *glyphs;	126	uint8_t *glyphs;
127		127
128	uint8_t *bgpixel;	128	uint8_t *bgpixel;
129		129
130	/** Glyph drawing function for this viewport. */	130	/** Glyph drawing function for this viewport. */
131	dg_t dglyph;	131	dg_t dglyph;
132		132
133	/* Auto-cursor position */	133	/* Auto-cursor position */
134	bool cursor_active;	134	bool cursor_active;
135	unsigned int cur_col;	135	unsigned int cur_col;
136	unsigned int cur_row;	136	unsigned int cur_row;
137	bool cursor_shown;	137	bool cursor_shown;
138		138
139	/* Back buffer */	139	/* Back buffer */
140	bb_cell_t *backbuf;	140	bb_cell_t *backbuf;
141	unsigned int bbsize;	141	unsigned int bbsize;
142	} viewport_t;	142	} viewport_t;
143		143
144	typedef struct {	144	typedef struct {
145	bool initialized;	145	bool initialized;
146	bool enabled;	146	bool enabled;
147	unsigned int vp;	147	unsigned int vp;
148		148
149	unsigned int pos;	149	unsigned int pos;
150	unsigned int animlen;	150	unsigned int animlen;
151	unsigned int pixmaps[MAX_ANIM_LEN];	151	unsigned int pixmaps[MAX_ANIM_LEN];
152	} animation_t;	152	} animation_t;
153		153
154	static animation_t animations[MAX_ANIMATIONS];	154	static animation_t animations[MAX_ANIMATIONS];
155	static bool anims_enabled;	155	static bool anims_enabled;
156		156
157	typedef struct {	157	typedef struct {
158	unsigned int width;	158	unsigned int width;
159	unsigned int height;	159	unsigned int height;
160	uint8_t *data;	160	uint8_t *data;
161	} pixmap_t;	161	} pixmap_t;
162		162
163	static pixmap_t pixmaps[MAX_PIXMAPS];	163	static pixmap_t pixmaps[MAX_PIXMAPS];
164	static viewport_t viewports[128];	164	static viewport_t viewports[128];
165		165
166	static bool client_connected = false; /*< Allow only 1 connection /	166	static bool client_connected = false; /*< Allow only 1 connection /
167		167
168	static uint32_t color_table[16] = {	168	static uint32_t color_table[16] = {
169	[COLOR_BLACK] = 0x000000,	169	[COLOR_BLACK] = 0x000000,
170	[COLOR_BLUE] = 0x0000f0,	170	[COLOR_BLUE] = 0x0000f0,
171	[COLOR_GREEN] = 0x00f000,	171	[COLOR_GREEN] = 0x00f000,
172	[COLOR_CYAN] = 0x00f0f0,	172	[COLOR_CYAN] = 0x00f0f0,
173	[COLOR_RED] = 0xf00000,	173	[COLOR_RED] = 0xf00000,
174	[COLOR_MAGENTA] = 0xf000f0,	174	[COLOR_MAGENTA] = 0xf000f0,
175	[COLOR_YELLOW] = 0xf0f000,	175	[COLOR_YELLOW] = 0xf0f000,
176	[COLOR_WHITE] = 0xf0f0f0,	176	[COLOR_WHITE] = 0xf0f0f0,
177		177
178	[8 + COLOR_BLACK] = 0x000000,	178	[8 + COLOR_BLACK] = 0x000000,
179	[8 + COLOR_BLUE] = 0x0000ff,	179	[8 + COLOR_BLUE] = 0x0000ff,
180	[8 + COLOR_GREEN] = 0x00ff00,	180	[8 + COLOR_GREEN] = 0x00ff00,
181	[8 + COLOR_CYAN] = 0x00ffff,	181	[8 + COLOR_CYAN] = 0x00ffff,
182	[8 + COLOR_RED] = 0xff0000,	182	[8 + COLOR_RED] = 0xff0000,
183	[8 + COLOR_MAGENTA] = 0xff00ff,	183	[8 + COLOR_MAGENTA] = 0xff00ff,
184	[8 + COLOR_YELLOW] = 0xffff00,	184	[8 + COLOR_YELLOW] = 0xffff00,
185	[8 + COLOR_WHITE] = 0xffffff,	185	[8 + COLOR_WHITE] = 0xffffff,
186	};	186	};
187		187
188	static int rgb_from_attr(attr_rgb_t rgb, const attrs_t a);	188	static int rgb_from_attr(attr_rgb_t rgb, const attrs_t a);
189	static int rgb_from_style(attr_rgb_t *rgb, int style);	189	static int rgb_from_style(attr_rgb_t *rgb, int style);
190	static int rgb_from_idx(attr_rgb_t *rgb, ipcarg_t fg_color,	190	static int rgb_from_idx(attr_rgb_t *rgb, ipcarg_t fg_color,
191	ipcarg_t bg_color, ipcarg_t flags);	191	ipcarg_t bg_color, ipcarg_t flags);
192		192
193	static int fb_set_color(viewport_t *vport, ipcarg_t fg_color,	193	static int fb_set_color(viewport_t *vport, ipcarg_t fg_color,
194	ipcarg_t bg_color, ipcarg_t attr);	194	ipcarg_t bg_color, ipcarg_t attr);
195		195
196	static void draw_glyph_aligned(unsigned int x, unsigned int y, bool cursor,	196	static void draw_glyph_aligned(unsigned int x, unsigned int y, bool cursor,
197	uint8_t *glyphs, uint8_t glyph, uint32_t fg_color, uint32_t bg_color);	197	uint8_t *glyphs, uint8_t glyph, uint32_t fg_color, uint32_t bg_color);
198	static void draw_glyph_fallback(unsigned int x, unsigned int y, bool cursor,	198	static void draw_glyph_fallback(unsigned int x, unsigned int y, bool cursor,
199	uint8_t *glyphs, uint8_t glyph, uint32_t fg_color, uint32_t bg_color);	199	uint8_t *glyphs, uint8_t glyph, uint32_t fg_color, uint32_t bg_color);
200		200
201	static void draw_vp_glyph(viewport_t *vport, bool cursor, unsigned int col,	201	static void draw_vp_glyph(viewport_t *vport, bool cursor, unsigned int col,
202	unsigned int row);	202	unsigned int row);
203		203
204		204
205	#define RED(x, bits) ((x >> (8 + 8 + 8 - bits)) & ((1 << bits) - 1))	205	#define RED(x, bits) ((x >> (8 + 8 + 8 - bits)) & ((1 << bits) - 1))
206	#define GREEN(x, bits) ((x >> (8 + 8 - bits)) & ((1 << bits) - 1))	206	#define GREEN(x, bits) ((x >> (8 + 8 - bits)) & ((1 << bits) - 1))
207	#define BLUE(x, bits) ((x >> (8 - bits)) & ((1 << bits) - 1))	207	#define BLUE(x, bits) ((x >> (8 - bits)) & ((1 << bits) - 1))
208		208
209	#define COL2X(col) ((col) * FONT_WIDTH)	209	#define COL2X(col) ((col) * FONT_WIDTH)
210	#define ROW2Y(row) ((row) * FONT_SCANLINES)	210	#define ROW2Y(row) ((row) * FONT_SCANLINES)
211		211
212	#define X2COL(x) ((x) / FONT_WIDTH)	212	#define X2COL(x) ((x) / FONT_WIDTH)
213	#define Y2ROW(y) ((y) / FONT_SCANLINES)	213	#define Y2ROW(y) ((y) / FONT_SCANLINES)
214		214
215	#define FB_POS(x, y) ((y) * screen.scanline + (x) * screen.pixelbytes)	215	#define FB_POS(x, y) ((y) * screen.scanline + (x) * screen.pixelbytes)
216	#define BB_POS(vport, col, row) ((row) * vport->cols + (col))	216	#define BB_POS(vport, col, row) ((row) * vport->cols + (col))
217	#define GLYPH_POS(glyph, y, cursor) (((glyph) + (cursor) * FONT_GLYPHS) * screen.glyphbytes + (y) * screen.glyphscanline)	217	#define GLYPH_POS(glyph, y, cursor) (((glyph) + (cursor) * FONT_GLYPHS) * screen.glyphbytes + (y) * screen.glyphscanline)
218		218
219		219
220	/** ARGB 8:8:8:8 conversion	220	/** ARGB 8:8:8:8 conversion
221	*	221	*
222	*/	222	*/
223	static void rgb_0888(void *dst, uint32_t rgb)	223	static void rgb_0888(void *dst, uint32_t rgb)
224	{	224	{
225	((uint32_t ) dst) = rgb & 0xffffff;	225	((uint32_t ) dst) = rgb & 0xffffff;
226	}	226	}
227		227
228		228
229	/** ABGR 8:8:8:8 conversion	229	/** ABGR 8:8:8:8 conversion
230	*	230	*
231	*/	231	*/
232	static void bgr_0888(void *dst, uint32_t rgb)	232	static void bgr_0888(void *dst, uint32_t rgb)
233	{	233	{
234	((uint32_t ) dst)	234	((uint32_t ) dst)
235	= (BLUE(rgb, 8) << 16) \| (GREEN(rgb, 8) << 8) \| RED(rgb, 8);	235	= (BLUE(rgb, 8) << 16) \| (GREEN(rgb, 8) << 8) \| RED(rgb, 8);
236	}	236	}
237		237
238		238
239	/** RGB 8:8:8 conversion	239	/** RGB 8:8:8 conversion
240	*	240	*
241	*/	241	*/
242	static void rgb_888(void *dst, uint32_t rgb)	242	static void rgb_888(void *dst, uint32_t rgb)
243	{	243	{
244	((uint8_t *) dst)[0] = BLUE(rgb, 8);	244	((uint8_t *) dst)[0] = BLUE(rgb, 8);
245	((uint8_t *) dst)[1] = GREEN(rgb, 8);	245	((uint8_t *) dst)[1] = GREEN(rgb, 8);
246	((uint8_t *) dst)[2] = RED(rgb, 8);	246	((uint8_t *) dst)[2] = RED(rgb, 8);
247	}	247	}
248		248
249		249
250	/** BGR 8:8:8 conversion	250	/** BGR 8:8:8 conversion
251	*	251	*
252	*/	252	*/
253	static void bgr_888(void *dst, uint32_t rgb)	253	static void bgr_888(void *dst, uint32_t rgb)
254	{	254	{
255	((uint8_t *) dst)[0] = RED(rgb, 8);	255	((uint8_t *) dst)[0] = RED(rgb, 8);
256	((uint8_t *) dst)[1] = GREEN(rgb, 8);	256	((uint8_t *) dst)[1] = GREEN(rgb, 8);
257	((uint8_t *) dst)[2] = BLUE(rgb, 8);	257	((uint8_t *) dst)[2] = BLUE(rgb, 8);
258	}	258	}
259		259
260		260
261	/** RGB 5:5:5 conversion	261	/** RGB 5:5:5 conversion
262	*	262	*
263	*/	263	*/
264	static void rgb_555(void *dst, uint32_t rgb)	264	static void rgb_555(void *dst, uint32_t rgb)
265	{	265	{
266	((uint16_t ) dst)	266	((uint16_t ) dst)
267	= (RED(rgb, 5) << 10) \| (GREEN(rgb, 5) << 5) \| BLUE(rgb, 5);	267	= (RED(rgb, 5) << 10) \| (GREEN(rgb, 5) << 5) \| BLUE(rgb, 5);
268	}	268	}
269		269
270		270
271	/** RGB 5:6:5 conversion	271	/** RGB 5:6:5 conversion
272	*	272	*
273	*/	273	*/
274	static void rgb_565(void *dst, uint32_t rgb)	274	static void rgb_565(void *dst, uint32_t rgb)
275	{	275	{
276	((uint16_t ) dst)	276	((uint16_t ) dst)
277	= (RED(rgb, 5) << 11) \| (GREEN(rgb, 6) << 5) \| BLUE(rgb, 5);	277	= (RED(rgb, 5) << 11) \| (GREEN(rgb, 6) << 5) \| BLUE(rgb, 5);
278	}	278	}
279		279
280		280
281	/** RGB 3:2:3	281	/** RGB 3:2:3
282	*	282	*
283	*/	283	*/
284	static void rgb_323(void *dst, uint32_t rgb)	284	static void rgb_323(void *dst, uint32_t rgb)
285	{	285	{
286	((uint8_t ) dst)	286	((uint8_t ) dst)
287	= ~((RED(rgb, 3) << 5) \| (GREEN(rgb, 2) << 3) \| BLUE(rgb, 3));	287	= ~((RED(rgb, 3) << 5) \| (GREEN(rgb, 2) << 3) \| BLUE(rgb, 3));
288	}	288	}
289		289
290	/** Draw a filled rectangle.	290	/** Draw a filled rectangle.
291	*	291	*
292	* @note Need real implementation that does not access VRAM twice.	292	* @note Need real implementation that does not access VRAM twice.
293	*/	293	*/
294	static void draw_filled_rect(unsigned int x0, unsigned int y0, unsigned int x1,	294	static void draw_filled_rect(unsigned int x0, unsigned int y0, unsigned int x1,
295	unsigned int y1, uint32_t color)	295	unsigned int y1, uint32_t color)
296	{	296	{
297	unsigned int x, y;	297	unsigned int x, y;
298	unsigned int copy_bytes;	298	unsigned int copy_bytes;
299		299
300	uint8_t sp, dp;	300	uint8_t sp, dp;
301	uint8_t cbuf[4];	301	uint8_t cbuf[4];
302		302
303	if (y0 >= y1 \|\| x0 >= x1) return;	303	if (y0 >= y1 \|\| x0 >= x1) return;
304	screen.rgb_conv(cbuf, color);	304	screen.rgb_conv(cbuf, color);
305		305
306	sp = &screen.fb_addr[FB_POS(x0, y0)];	306	sp = &screen.fb_addr[FB_POS(x0, y0)];
307	dp = sp;	307	dp = sp;
308		308
309	/* Draw the first line. */	309	/* Draw the first line. */
310	for (x = x0; x < x1; x++) {	310	for (x = x0; x < x1; x++) {
311	memcpy(dp, cbuf, screen.pixelbytes);	311	memcpy(dp, cbuf, screen.pixelbytes);
312	dp += screen.pixelbytes;	312	dp += screen.pixelbytes;
313	}	313	}
314		314
315	dp = sp + screen.scanline;	315	dp = sp + screen.scanline;
316	copy_bytes = (x1 - x0) * screen.pixelbytes;	316	copy_bytes = (x1 - x0) * screen.pixelbytes;
317		317
318	/* Draw the remaining lines by copying. */	318	/* Draw the remaining lines by copying. */
319	for (y = y0 + 1; y < y1; y++) {	319	for (y = y0 + 1; y < y1; y++) {
320	memcpy(dp, sp, copy_bytes);	320	memcpy(dp, sp, copy_bytes);
321	dp += screen.scanline;	321	dp += screen.scanline;
322	}	322	}
323	}	323	}
324		324
325	/** Redraw viewport.	325	/** Redraw viewport.
326	*	326	*
327	* @param vport Viewport to redraw	327	* @param vport Viewport to redraw
328	*	328	*
329	*/	329	*/
330	static void vport_redraw(viewport_t *vport)	330	static void vport_redraw(viewport_t *vport)
331	{	331	{
332	unsigned int row, col;	332	unsigned int row, col;
333		333
334	for (row = 0; row < vport->rows; row++) {	334	for (row = 0; row < vport->rows; row++) {
335	for (col = 0; col < vport->cols; col++) {	335	for (col = 0; col < vport->cols; col++) {
336	draw_vp_glyph(vport, false, col, row);	336	draw_vp_glyph(vport, false, col, row);
337	}	337	}
338	}	338	}
339		339
340	if (COL2X(vport->cols) < vport->width) {	340	if (COL2X(vport->cols) < vport->width) {
341	draw_filled_rect(	341	draw_filled_rect(
342	vport->x + COL2X(vport->cols), vport->y,	342	vport->x + COL2X(vport->cols), vport->y,
343	vport->x + vport->width, vport->y + vport->height,	343	vport->x + vport->width, vport->y + vport->height,
344	vport->attr.bg_color);	344	vport->attr.bg_color);
345	}	345	}
346		346
347	if (ROW2Y(vport->rows) < vport->height) {	347	if (ROW2Y(vport->rows) < vport->height) {
348	draw_filled_rect(	348	draw_filled_rect(
349	vport->x, vport->y + ROW2Y(vport->rows),	349	vport->x, vport->y + ROW2Y(vport->rows),
350	vport->x + vport->width, vport->y + vport->height,	350	vport->x + vport->width, vport->y + vport->height,
351	vport->attr.bg_color);	351	vport->attr.bg_color);
352	}	352	}
353	}	353	}
354		354
355	static void backbuf_clear(bb_cell_t *backbuf, size_t len, uint32_t fg_color,	355	static void backbuf_clear(bb_cell_t *backbuf, size_t len, uint32_t fg_color,
356	uint32_t bg_color)	356	uint32_t bg_color)
357	{	357	{
358	unsigned i;	358	unsigned i;
359		359
360	for (i = 0; i < len; i++) {	360	for (i = 0; i < len; i++) {
361	backbuf[i].glyph = 0;	361	backbuf[i].glyph = 0;
362	backbuf[i].fg_color = fg_color;	362	backbuf[i].fg_color = fg_color;
363	backbuf[i].bg_color = bg_color;	363	backbuf[i].bg_color = bg_color;
364	}	364	}
365	}	365	}
366		366
367	/** Clear viewport.	367	/** Clear viewport.
368	*	368	*
369	* @param vport Viewport to clear	369	* @param vport Viewport to clear
370	*	370	*
371	*/	371	*/
372	static void vport_clear(viewport_t *vport)	372	static void vport_clear(viewport_t *vport)
373	{	373	{
374	backbuf_clear(vport->backbuf, vport->cols * vport->rows,	374	backbuf_clear(vport->backbuf, vport->cols * vport->rows,
375	vport->attr.fg_color, vport->attr.bg_color);	375	vport->attr.fg_color, vport->attr.bg_color);
376	vport_redraw(vport);	376	vport_redraw(vport);
377	}	377	}
378		378
379	/** Scroll viewport by the specified number of lines.	379	/** Scroll viewport by the specified number of lines.
380	*	380	*
381	* @param vport Viewport to scroll	381	* @param vport Viewport to scroll
382	* @param lines Number of lines to scroll	382	* @param lines Number of lines to scroll
383	*	383	*
384	*/	384	*/
385	static void vport_scroll(viewport_t *vport, int lines)	385	static void vport_scroll(viewport_t *vport, int lines)
386	{	386	{
387	unsigned int row, col;	387	unsigned int row, col;
388	unsigned int x, y;	388	unsigned int x, y;
389	uint8_t glyph;	389	uint8_t glyph;
390	uint32_t fg_color;	390	uint32_t fg_color;
391	uint32_t bg_color;	391	uint32_t bg_color;
392	bb_cell_t bbp, xbp;	392	bb_cell_t bbp, xbp;
393		393
394	/*	394	/*
395	* Redraw.	395	* Redraw.
396	*/	396	*/
397		397
398	y = vport->y;	398	y = vport->y;
399	for (row = 0; row < vport->rows; row++) {	399	for (row = 0; row < vport->rows; row++) {
400	x = vport->x;	400	x = vport->x;
401	for (col = 0; col < vport->cols; col++) {	401	for (col = 0; col < vport->cols; col++) {
402	if ((row + lines >= 0) && (row + lines < vport->rows)) {	402	if ((row + lines >= 0) && (row + lines < vport->rows)) {
403	xbp = &vport->backbuf[BB_POS(vport, col, row + lines)];	403	xbp = &vport->backbuf[BB_POS(vport, col, row + lines)];
404	bbp = &vport->backbuf[BB_POS(vport, col, row)];	404	bbp = &vport->backbuf[BB_POS(vport, col, row)];
405		405
406	glyph = xbp->glyph;	406	glyph = xbp->glyph;
407	fg_color = xbp->fg_color;	407	fg_color = xbp->fg_color;
408	bg_color = xbp->bg_color;	408	bg_color = xbp->bg_color;
409		409
410	if (bbp->glyph == glyph &&	410	if (bbp->glyph == glyph &&
411	bbp->fg_color == xbp->fg_color &&	411	bbp->fg_color == xbp->fg_color &&
412	bbp->bg_color == xbp->bg_color) {	412	bbp->bg_color == xbp->bg_color) {
413	x += FONT_WIDTH;	413	x += FONT_WIDTH;
414	continue;	414	continue;
415	}	415	}
416	} else {	416	} else {
417	glyph = 0;	417	glyph = 0;
418	fg_color = vport->attr.fg_color;	418	fg_color = vport->attr.fg_color;
419	bg_color = vport->attr.bg_color;	419	bg_color = vport->attr.bg_color;
420	}	420	}
421		421
422	(*vport->dglyph)(x, y, false, vport->glyphs, glyph,	422	(*vport->dglyph)(x, y, false, vport->glyphs, glyph,
423	fg_color, bg_color);	423	fg_color, bg_color);
424	x += FONT_WIDTH;	424	x += FONT_WIDTH;
425	}	425	}
426	y += FONT_SCANLINES;	426	y += FONT_SCANLINES;
427	}	427	}
428		428
429	/*	429	/*
430	* Scroll backbuffer.	430	* Scroll backbuffer.
431	*/	431	*/
432		432
433	if (lines > 0) {	433	if (lines > 0) {
434	memmove(vport->backbuf, vport->backbuf + vport->cols * lines,	434	memmove(vport->backbuf, vport->backbuf + vport->cols * lines,
435	vport->cols * (vport->rows - lines) * sizeof(bb_cell_t));	435	vport->cols * (vport->rows - lines) * sizeof(bb_cell_t));
436	backbuf_clear(&vport->backbuf[BB_POS(vport, 0, vport->rows - lines)],	436	backbuf_clear(&vport->backbuf[BB_POS(vport, 0, vport->rows - lines)],
437	vport->cols * lines, vport->attr.fg_color, vport->attr.bg_color);	437	vport->cols * lines, vport->attr.fg_color, vport->attr.bg_color);
438	} else {	438	} else {
439	memmove(vport->backbuf - vport->cols * lines, vport->backbuf,	439	memmove(vport->backbuf - vport->cols * lines, vport->backbuf,
440	vport->cols * (vport->rows + lines) * sizeof(bb_cell_t));	440	vport->cols * (vport->rows + lines) * sizeof(bb_cell_t));
441	backbuf_clear(vport->backbuf, - vport->cols * lines,	441	backbuf_clear(vport->backbuf, - vport->cols * lines,
442	vport->attr.fg_color, vport->attr.bg_color);	442	vport->attr.fg_color, vport->attr.bg_color);
443	}	443	}
444	}	444	}
445		445
446	/** Render glyphs	446	/** Render glyphs
447	*	447	*
448	* Convert glyphs from device independent font	448	* Convert glyphs from device independent font
449	* description to current visual representation.	449	* description to current visual representation.
450	*	450	*
451	* @param vport Viewport	451	* @param vport Viewport
452	*	452	*
453	*/	453	*/
454	static void render_glyphs(viewport_t* vport)	454	static void render_glyphs(viewport_t* vport)
455	{	455	{
456	unsigned int glyph;	456	unsigned int glyph;
457		457
458	for (glyph = 0; glyph < FONT_GLYPHS; glyph++) {	458	for (glyph = 0; glyph < FONT_GLYPHS; glyph++) {
459	unsigned int y;	459	unsigned int y;
460		460
461	for (y = 0; y < FONT_SCANLINES; y++) {	461	for (y = 0; y < FONT_SCANLINES; y++) {
462	unsigned int x;	462	unsigned int x;
463		463
464	for (x = 0; x < FONT_WIDTH; x++) {	464	for (x = 0; x < FONT_WIDTH; x++) {
465	screen.rgb_conv(&vport->glyphs[GLYPH_POS(glyph, y, false) + x * screen.pixelbytes],	465	screen.rgb_conv(&vport->glyphs[GLYPH_POS(glyph, y, false) + x * screen.pixelbytes],
466	(fb_font[glyph * FONT_SCANLINES + y] & (1 << (7 - x)))	466	(fb_font[glyph * FONT_SCANLINES + y] & (1 << (7 - x)))
467	? 0xffffff : 0x000000);	467	? 0xffffff : 0x000000);
468		468
469	screen.rgb_conv(&vport->glyphs[GLYPH_POS(glyph, y, true) + x * screen.pixelbytes],	469	screen.rgb_conv(&vport->glyphs[GLYPH_POS(glyph, y, true) + x * screen.pixelbytes],
470	(fb_font[glyph * FONT_SCANLINES + y] & (1 << (7 - x)))	470	(fb_font[glyph * FONT_SCANLINES + y] & (1 << (7 - x)))
471	? 0x000000 : 0xffffff);	471	? 0x000000 : 0xffffff);
472	}	472	}
473	}	473	}
474	}	474	}
475		475
476	screen.rgb_conv(vport->bgpixel, vport->attr.bg_color);	476	screen.rgb_conv(vport->bgpixel, vport->attr.bg_color);
477	}	477	}
478		478
479		479
480	/** Create new viewport	480	/** Create new viewport
481	*	481	*
482	* @param x Origin of the viewport (x).	482	* @param x Origin of the viewport (x).
483	* @param y Origin of the viewport (y).	483	* @param y Origin of the viewport (y).
484	* @param width Width of the viewport.	484	* @param width Width of the viewport.
485	* @param height Height of the viewport.	485	* @param height Height of the viewport.
486	*	486	*
487	* @return New viewport number.	487	* @return New viewport number.
488	*	488	*
489	*/	489	*/
490	static int vport_create(unsigned int x, unsigned int y,	490	static int vport_create(unsigned int x, unsigned int y,
491	unsigned int width, unsigned int height)	491	unsigned int width, unsigned int height)
492	{	492	{
493	unsigned int i;	493	unsigned int i;
494		494
495	for (i = 0; i < MAX_VIEWPORTS; i++) {	495	for (i = 0; i < MAX_VIEWPORTS; i++) {
496	if (!viewports[i].initialized)	496	if (!viewports[i].initialized)
497	break;	497	break;
498	}	498	}
499	if (i == MAX_VIEWPORTS)	499	if (i == MAX_VIEWPORTS)
500	return ELIMIT;	500	return ELIMIT;

Subversion Repositories HelenOS

(root)/trunk/uspace/srv/fb/fb.c – Rev 3908 → 4164