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 <io/color.h>
#include <io/style.h>
#include <async.h>
#include <fibril.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 (((int) row + lines >= 0) &&
                ((int) row + lines < (int) 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 thread-safe, you would have
 * to redefine static variables with fibril_local.
 *
 */
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;
}
 
/**
 * @}
 */
 

Rev 4528	Rev 4548
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 <io/color.h>	54	#include <io/color.h>
55	#include <io/style.h>	55	#include <io/style.h>
56	#include <async.h>	56	#include <async.h>
57	#include <fibril.h>	57	#include <fibril.h>
58	#include <bool.h>	58	#include <bool.h>
59		59
60	#include "font-8x16.h"	60	#include "font-8x16.h"
61	#include "fb.h"	61	#include "fb.h"
62	#include "main.h"	62	#include "main.h"
63	#include "../console/screenbuffer.h"	63	#include "../console/screenbuffer.h"
64	#include "ppm.h"	64	#include "ppm.h"
65		65
66	#include "pointer.xbm"	66	#include "pointer.xbm"
67	#include "pointer_mask.xbm"	67	#include "pointer_mask.xbm"
68		68
69	#define DEFAULT_BGCOLOR 0xf0f0f0	69	#define DEFAULT_BGCOLOR 0xf0f0f0
70	#define DEFAULT_FGCOLOR 0x000000	70	#define DEFAULT_FGCOLOR 0x000000
71		71
72	#define GLYPH_UNAVAIL '?'	72	#define GLYPH_UNAVAIL '?'
73		73
74	#define MAX_ANIM_LEN 8	74	#define MAX_ANIM_LEN 8
75	#define MAX_ANIMATIONS 4	75	#define MAX_ANIMATIONS 4
76	#define MAX_PIXMAPS 256 /*< Maximum number of saved pixmaps /	76	#define MAX_PIXMAPS 256 /*< Maximum number of saved pixmaps /
77	#define MAX_VIEWPORTS 128 /*< Viewport is a rectangular area on the screen /	77	#define MAX_VIEWPORTS 128 /*< Viewport is a rectangular area on the screen /
78		78
79	/** Function to render a pixel from a RGB value. */	79	/** Function to render a pixel from a RGB value. */
80	typedef void (rgb_conv_t)(void , uint32_t);	80	typedef void (rgb_conv_t)(void , uint32_t);
81		81
82	/** Function to render a bit mask. */	82	/** Function to render a bit mask. */
83	typedef void (mask_conv_t)(void , bool);	83	typedef void (mask_conv_t)(void , bool);
84		84
85	/** Function to draw a glyph. */	85	/** Function to draw a glyph. */
86	typedef void (*dg_t)(unsigned int x, unsigned int y, bool cursor,	86	typedef void (*dg_t)(unsigned int x, unsigned int y, bool cursor,
87	uint8_t *glyphs, uint32_t glyph, uint32_t fg_color, uint32_t bg_color);	87	uint8_t *glyphs, uint32_t glyph, uint32_t fg_color, uint32_t bg_color);
88		88
89	struct {	89	struct {
90	uint8_t *fb_addr;	90	uint8_t *fb_addr;
91		91
92	unsigned int xres;	92	unsigned int xres;
93	unsigned int yres;	93	unsigned int yres;
94		94
95	unsigned int scanline;	95	unsigned int scanline;
96	unsigned int glyphscanline;	96	unsigned int glyphscanline;
97		97
98	unsigned int pixelbytes;	98	unsigned int pixelbytes;
99	unsigned int glyphbytes;	99	unsigned int glyphbytes;
100		100
101	/** Pre-rendered mask for rendering glyphs. Specific for the visual. */	101	/** Pre-rendered mask for rendering glyphs. Specific for the visual. */
102	uint8_t *glyphs;	102	uint8_t *glyphs;
103		103
104	rgb_conv_t rgb_conv;	104	rgb_conv_t rgb_conv;
105	mask_conv_t mask_conv;	105	mask_conv_t mask_conv;
106	} screen;	106	} screen;
107		107
108	/** Backbuffer character cell. */	108	/** Backbuffer character cell. */
109	typedef struct {	109	typedef struct {
110	uint32_t glyph;	110	uint32_t glyph;
111	uint32_t fg_color;	111	uint32_t fg_color;
112	uint32_t bg_color;	112	uint32_t bg_color;
113	} bb_cell_t;	113	} bb_cell_t;
114		114
115	typedef struct {	115	typedef struct {
116	bool initialized;	116	bool initialized;
117	unsigned int x;	117	unsigned int x;
118	unsigned int y;	118	unsigned int y;
119	unsigned int width;	119	unsigned int width;
120	unsigned int height;	120	unsigned int height;
121		121
122	/* Text support in window */	122	/* Text support in window */
123	unsigned int cols;	123	unsigned int cols;
124	unsigned int rows;	124	unsigned int rows;
125		125
126	/*	126	/*
127	* Style and glyphs for text printing	127	* Style and glyphs for text printing
128	*/	128	*/
129		129
130	/** Current attributes. */	130	/** Current attributes. */
131	attr_rgb_t attr;	131	attr_rgb_t attr;
132		132
133	uint8_t *bgpixel;	133	uint8_t *bgpixel;
134		134
135	/**	135	/**
136	* Glyph drawing function for this viewport. Different viewports	136	* Glyph drawing function for this viewport. Different viewports
137	* might use different drawing functions depending on whether their	137	* might use different drawing functions depending on whether their
138	* scanlines are aligned on a word boundary.	138	* scanlines are aligned on a word boundary.
139	*/	139	*/
140	dg_t dglyph;	140	dg_t dglyph;
141		141
142	/* Auto-cursor position */	142	/* Auto-cursor position */
143	bool cursor_active;	143	bool cursor_active;
144	unsigned int cur_col;	144	unsigned int cur_col;
145	unsigned int cur_row;	145	unsigned int cur_row;
146	bool cursor_shown;	146	bool cursor_shown;
147		147
148	/* Back buffer */	148	/* Back buffer */
149	bb_cell_t *backbuf;	149	bb_cell_t *backbuf;
150	unsigned int bbsize;	150	unsigned int bbsize;
151	} viewport_t;	151	} viewport_t;
152		152
153	typedef struct {	153	typedef struct {
154	bool initialized;	154	bool initialized;
155	bool enabled;	155	bool enabled;
156	unsigned int vp;	156	unsigned int vp;
157		157
158	unsigned int pos;	158	unsigned int pos;
159	unsigned int animlen;	159	unsigned int animlen;
160	unsigned int pixmaps[MAX_ANIM_LEN];	160	unsigned int pixmaps[MAX_ANIM_LEN];
161	} animation_t;	161	} animation_t;
162		162
163	static animation_t animations[MAX_ANIMATIONS];	163	static animation_t animations[MAX_ANIMATIONS];
164	static bool anims_enabled;	164	static bool anims_enabled;
165		165
166	typedef struct {	166	typedef struct {
167	unsigned int width;	167	unsigned int width;
168	unsigned int height;	168	unsigned int height;
169	uint8_t *data;	169	uint8_t *data;
170	} pixmap_t;	170	} pixmap_t;
171		171
172	static pixmap_t pixmaps[MAX_PIXMAPS];	172	static pixmap_t pixmaps[MAX_PIXMAPS];
173	static viewport_t viewports[128];	173	static viewport_t viewports[128];
174		174
175	static bool client_connected = false; /*< Allow only 1 connection /	175	static bool client_connected = false; /*< Allow only 1 connection /
176		176
177	static uint32_t color_table[16] = {	177	static uint32_t color_table[16] = {
178	[COLOR_BLACK] = 0x000000,	178	[COLOR_BLACK] = 0x000000,
179	[COLOR_BLUE] = 0x0000f0,	179	[COLOR_BLUE] = 0x0000f0,
180	[COLOR_GREEN] = 0x00f000,	180	[COLOR_GREEN] = 0x00f000,
181	[COLOR_CYAN] = 0x00f0f0,	181	[COLOR_CYAN] = 0x00f0f0,
182	[COLOR_RED] = 0xf00000,	182	[COLOR_RED] = 0xf00000,
183	[COLOR_MAGENTA] = 0xf000f0,	183	[COLOR_MAGENTA] = 0xf000f0,
184	[COLOR_YELLOW] = 0xf0f000,	184	[COLOR_YELLOW] = 0xf0f000,
185	[COLOR_WHITE] = 0xf0f0f0,	185	[COLOR_WHITE] = 0xf0f0f0,
186		186
187	[8 + COLOR_BLACK] = 0x000000,	187	[8 + COLOR_BLACK] = 0x000000,
188	[8 + COLOR_BLUE] = 0x0000ff,	188	[8 + COLOR_BLUE] = 0x0000ff,
189	[8 + COLOR_GREEN] = 0x00ff00,	189	[8 + COLOR_GREEN] = 0x00ff00,
190	[8 + COLOR_CYAN] = 0x00ffff,	190	[8 + COLOR_CYAN] = 0x00ffff,
191	[8 + COLOR_RED] = 0xff0000,	191	[8 + COLOR_RED] = 0xff0000,
192	[8 + COLOR_MAGENTA] = 0xff00ff,	192	[8 + COLOR_MAGENTA] = 0xff00ff,
193	[8 + COLOR_YELLOW] = 0xffff00,	193	[8 + COLOR_YELLOW] = 0xffff00,
194	[8 + COLOR_WHITE] = 0xffffff,	194	[8 + COLOR_WHITE] = 0xffffff,
195	};	195	};
196		196
197	static int rgb_from_attr(attr_rgb_t rgb, const attrs_t a);	197	static int rgb_from_attr(attr_rgb_t rgb, const attrs_t a);
198	static int rgb_from_style(attr_rgb_t *rgb, int style);	198	static int rgb_from_style(attr_rgb_t *rgb, int style);
199	static int rgb_from_idx(attr_rgb_t *rgb, ipcarg_t fg_color,	199	static int rgb_from_idx(attr_rgb_t *rgb, ipcarg_t fg_color,
200	ipcarg_t bg_color, ipcarg_t flags);	200	ipcarg_t bg_color, ipcarg_t flags);
201		201
202	static int fb_set_color(viewport_t *vport, ipcarg_t fg_color,	202	static int fb_set_color(viewport_t *vport, ipcarg_t fg_color,
203	ipcarg_t bg_color, ipcarg_t attr);	203	ipcarg_t bg_color, ipcarg_t attr);
204		204
205	static void draw_glyph_aligned(unsigned int x, unsigned int y, bool cursor,	205	static void draw_glyph_aligned(unsigned int x, unsigned int y, bool cursor,
206	uint8_t *glyphs, uint32_t glyph, uint32_t fg_color, uint32_t bg_color);	206	uint8_t *glyphs, uint32_t glyph, uint32_t fg_color, uint32_t bg_color);
207	static void draw_glyph_fallback(unsigned int x, unsigned int y, bool cursor,	207	static void draw_glyph_fallback(unsigned int x, unsigned int y, bool cursor,
208	uint8_t *glyphs, uint32_t glyph, uint32_t fg_color, uint32_t bg_color);	208	uint8_t *glyphs, uint32_t glyph, uint32_t fg_color, uint32_t bg_color);
209		209
210	static void draw_vp_glyph(viewport_t *vport, bool cursor, unsigned int col,	210	static void draw_vp_glyph(viewport_t *vport, bool cursor, unsigned int col,
211	unsigned int row);	211	unsigned int row);
212		212
213		213
214	#define RED(x, bits) ((x >> (8 + 8 + 8 - bits)) & ((1 << bits) - 1))	214	#define RED(x, bits) ((x >> (8 + 8 + 8 - bits)) & ((1 << bits) - 1))
215	#define GREEN(x, bits) ((x >> (8 + 8 - bits)) & ((1 << bits) - 1))	215	#define GREEN(x, bits) ((x >> (8 + 8 - bits)) & ((1 << bits) - 1))
216	#define BLUE(x, bits) ((x >> (8 - bits)) & ((1 << bits) - 1))	216	#define BLUE(x, bits) ((x >> (8 - bits)) & ((1 << bits) - 1))
217		217
218	#define COL2X(col) ((col) * FONT_WIDTH)	218	#define COL2X(col) ((col) * FONT_WIDTH)
219	#define ROW2Y(row) ((row) * FONT_SCANLINES)	219	#define ROW2Y(row) ((row) * FONT_SCANLINES)
220		220
221	#define X2COL(x) ((x) / FONT_WIDTH)	221	#define X2COL(x) ((x) / FONT_WIDTH)
222	#define Y2ROW(y) ((y) / FONT_SCANLINES)	222	#define Y2ROW(y) ((y) / FONT_SCANLINES)
223		223
224	#define FB_POS(x, y) ((y) * screen.scanline + (x) * screen.pixelbytes)	224	#define FB_POS(x, y) ((y) * screen.scanline + (x) * screen.pixelbytes)
225	#define BB_POS(vport, col, row) ((row) * vport->cols + (col))	225	#define BB_POS(vport, col, row) ((row) * vport->cols + (col))
226	#define GLYPH_POS(glyph, y, cursor) (((glyph) + (cursor) * FONT_GLYPHS) * screen.glyphbytes + (y) * screen.glyphscanline)	226	#define GLYPH_POS(glyph, y, cursor) (((glyph) + (cursor) * FONT_GLYPHS) * screen.glyphbytes + (y) * screen.glyphscanline)
227		227
228		228
229	/** ARGB 8:8:8:8 conversion	229	/** ARGB 8:8:8:8 conversion
230	*	230	*
231	*/	231	*/
232	static void rgb_0888(void *dst, uint32_t rgb)	232	static void rgb_0888(void *dst, uint32_t rgb)
233	{	233	{
234	((uint32_t ) dst) = rgb & 0x00ffffff;	234	((uint32_t ) dst) = rgb & 0x00ffffff;
235	}	235	}
236		236
237	static void mask_0888(void *dst, bool mask)	237	static void mask_0888(void *dst, bool mask)
238	{	238	{
239	((uint32_t ) dst) = (mask ? 0x00ffffff : 0);	239	((uint32_t ) dst) = (mask ? 0x00ffffff : 0);
240	}	240	}
241		241
242		242
243	/** ABGR 8:8:8:8 conversion	243	/** ABGR 8:8:8:8 conversion
244	*	244	*
245	*/	245	*/
246	static void bgr_0888(void *dst, uint32_t rgb)	246	static void bgr_0888(void *dst, uint32_t rgb)
247	{	247	{
248	((uint32_t ) dst)	248	((uint32_t ) dst)
249	= (BLUE(rgb, 8) << 16) \| (GREEN(rgb, 8) << 8) \| RED(rgb, 8);	249	= (BLUE(rgb, 8) << 16) \| (GREEN(rgb, 8) << 8) \| RED(rgb, 8);
250	}	250	}
251		251
252		252
253	/** RGB 8:8:8 conversion	253	/** RGB 8:8:8 conversion
254	*	254	*
255	*/	255	*/
256	static void rgb_888(void *dst, uint32_t rgb)	256	static void rgb_888(void *dst, uint32_t rgb)
257	{	257	{
258	((uint8_t *) dst)[0] = BLUE(rgb, 8);	258	((uint8_t *) dst)[0] = BLUE(rgb, 8);
259	((uint8_t *) dst)[1] = GREEN(rgb, 8);	259	((uint8_t *) dst)[1] = GREEN(rgb, 8);
260	((uint8_t *) dst)[2] = RED(rgb, 8);	260	((uint8_t *) dst)[2] = RED(rgb, 8);
261	}	261	}
262		262
263	static void mask_888(void *dst, bool mask)	263	static void mask_888(void *dst, bool mask)
264	{	264	{
265	if (mask) {	265	if (mask) {
266	((uint8_t *) dst)[0] = 0xff;	266	((uint8_t *) dst)[0] = 0xff;
267	((uint8_t *) dst)[1] = 0xff;	267	((uint8_t *) dst)[1] = 0xff;
268	((uint8_t *) dst)[2] = 0xff;	268	((uint8_t *) dst)[2] = 0xff;
269	} else {	269	} else {
270	((uint8_t *) dst)[0] = 0;	270	((uint8_t *) dst)[0] = 0;
271	((uint8_t *) dst)[1] = 0;	271	((uint8_t *) dst)[1] = 0;
272	((uint8_t *) dst)[2] = 0;	272	((uint8_t *) dst)[2] = 0;
273	}	273	}
274	}	274	}
275		275
276		276
277	/** BGR 8:8:8 conversion	277	/** BGR 8:8:8 conversion
278	*	278	*
279	*/	279	*/
280	static void bgr_888(void *dst, uint32_t rgb)	280	static void bgr_888(void *dst, uint32_t rgb)
281	{	281	{
282	((uint8_t *) dst)[0] = RED(rgb, 8);	282	((uint8_t *) dst)[0] = RED(rgb, 8);
283	((uint8_t *) dst)[1] = GREEN(rgb, 8);	283	((uint8_t *) dst)[1] = GREEN(rgb, 8);
284	((uint8_t *) dst)[2] = BLUE(rgb, 8);	284	((uint8_t *) dst)[2] = BLUE(rgb, 8);
285	}	285	}
286		286
287		287
288	/** RGB 5:5:5 conversion	288	/** RGB 5:5:5 conversion
289	*	289	*
290	*/	290	*/
291	static void rgb_555(void *dst, uint32_t rgb)	291	static void rgb_555(void *dst, uint32_t rgb)
292	{	292	{
293	((uint16_t ) dst)	293	((uint16_t ) dst)
294	= (RED(rgb, 5) << 10) \| (GREEN(rgb, 5) << 5) \| BLUE(rgb, 5);	294	= (RED(rgb, 5) << 10) \| (GREEN(rgb, 5) << 5) \| BLUE(rgb, 5);
295	}	295	}
296		296
297	static void mask_555(void *dst, bool mask)	297	static void mask_555(void *dst, bool mask)
298	{	298	{
299	((uint16_t ) dst) = (mask ? 0x7fff : 0);	299	((uint16_t ) dst) = (mask ? 0x7fff : 0);
300	}	300	}
301		301
302		302
303	/** RGB 5:6:5 conversion	303	/** RGB 5:6:5 conversion
304	*	304	*
305	*/	305	*/
306	static void rgb_565(void *dst, uint32_t rgb)	306	static void rgb_565(void *dst, uint32_t rgb)
307	{	307	{
308	((uint16_t ) dst)	308	((uint16_t ) dst)
309	= (RED(rgb, 5) << 11) \| (GREEN(rgb, 6) << 5) \| BLUE(rgb, 5);	309	= (RED(rgb, 5) << 11) \| (GREEN(rgb, 6) << 5) \| BLUE(rgb, 5);
310	}	310	}
311		311
312	static void mask_565(void *dst, bool mask)	312	static void mask_565(void *dst, bool mask)
313	{	313	{
314	((uint16_t ) dst) = (mask ? 0xffff : 0);	314	((uint16_t ) dst) = (mask ? 0xffff : 0);
315	}	315	}
316		316
317		317
318	/** RGB 3:2:3	318	/** RGB 3:2:3
319	*	319	*
320	*/	320	*/
321	static void rgb_323(void *dst, uint32_t rgb)	321	static void rgb_323(void *dst, uint32_t rgb)
322	{	322	{
323	((uint8_t ) dst)	323	((uint8_t ) dst)
324	= ~((RED(rgb, 3) << 5) \| (GREEN(rgb, 2) << 3) \| BLUE(rgb, 3));	324	= ~((RED(rgb, 3) << 5) \| (GREEN(rgb, 2) << 3) \| BLUE(rgb, 3));
325	}	325	}
326		326
327	static void mask_323(void *dst, bool mask)	327	static void mask_323(void *dst, bool mask)
328	{	328	{
329	((uint8_t ) dst) = (mask ? 0xff : 0);	329	((uint8_t ) dst) = (mask ? 0xff : 0);
330	}	330	}
331		331
332	/** Draw a filled rectangle.	332	/** Draw a filled rectangle.
333	*	333	*
334	* @note Need real implementation that does not access VRAM twice.	334	* @note Need real implementation that does not access VRAM twice.
335	*	335	*
336	*/	336	*/
337	static void draw_filled_rect(unsigned int x0, unsigned int y0, unsigned int x1,	337	static void draw_filled_rect(unsigned int x0, unsigned int y0, unsigned int x1,
338	unsigned int y1, uint32_t color)	338	unsigned int y1, uint32_t color)
339	{	339	{
340	unsigned int x;	340	unsigned int x;
341	unsigned int y;	341	unsigned int y;
342	unsigned int copy_bytes;	342	unsigned int copy_bytes;
343		343
344	uint8_t *sp;	344	uint8_t *sp;
345	uint8_t *dp;	345	uint8_t *dp;
346	uint8_t cbuf[4];	346	uint8_t cbuf[4];
347		347
348	if ((y0 >= y1) \|\| (x0 >= x1))	348	if ((y0 >= y1) \|\| (x0 >= x1))
349	return;	349	return;
350		350
351	screen.rgb_conv(cbuf, color);	351	screen.rgb_conv(cbuf, color);
352		352
353	sp = &screen.fb_addr[FB_POS(x0, y0)];	353	sp = &screen.fb_addr[FB_POS(x0, y0)];
354	dp = sp;	354	dp = sp;
355		355
356	/* Draw the first line. */	356	/* Draw the first line. */
357	for (x = x0; x < x1; x++) {	357	for (x = x0; x < x1; x++) {
358	memcpy(dp, cbuf, screen.pixelbytes);	358	memcpy(dp, cbuf, screen.pixelbytes);
359	dp += screen.pixelbytes;	359	dp += screen.pixelbytes;
360	}	360	}
361		361
362	dp = sp + screen.scanline;	362	dp = sp + screen.scanline;
363	copy_bytes = (x1 - x0) * screen.pixelbytes;	363	copy_bytes = (x1 - x0) * screen.pixelbytes;
364		364
365	/* Draw the remaining lines by copying. */	365	/* Draw the remaining lines by copying. */
366	for (y = y0 + 1; y < y1; y++) {	366	for (y = y0 + 1; y < y1; y++) {
367	memcpy(dp, sp, copy_bytes);	367	memcpy(dp, sp, copy_bytes);
368	dp += screen.scanline;	368	dp += screen.scanline;
369	}	369	}
370	}	370	}
371		371
372	/** Redraw viewport.	372	/** Redraw viewport.
373	*	373	*
374	* @param vport Viewport to redraw	374	* @param vport Viewport to redraw
375	*	375	*
376	*/	376	*/
377	static void vport_redraw(viewport_t *vport)	377	static void vport_redraw(viewport_t *vport)
378	{	378	{
379	unsigned int col;	379	unsigned int col;
380	unsigned int row;	380	unsigned int row;
381		381
382	for (row = 0; row < vport->rows; row++) {	382	for (row = 0; row < vport->rows; row++) {
383	for (col = 0; col < vport->cols; col++) {	383	for (col = 0; col < vport->cols; col++) {
384	draw_vp_glyph(vport, false, col, row);	384	draw_vp_glyph(vport, false, col, row);
385	}	385	}
386	}	386	}
387		387
388	if (COL2X(vport->cols) < vport->width) {	388	if (COL2X(vport->cols) < vport->width) {
389	draw_filled_rect(	389	draw_filled_rect(
390	vport->x + COL2X(vport->cols), vport->y,	390	vport->x + COL2X(vport->cols), vport->y,
391	vport->x + vport->width, vport->y + vport->height,	391	vport->x + vport->width, vport->y + vport->height,
392	vport->attr.bg_color);	392	vport->attr.bg_color);
393	}	393	}
394		394
395	if (ROW2Y(vport->rows) < vport->height) {	395	if (ROW2Y(vport->rows) < vport->height) {
396	draw_filled_rect(	396	draw_filled_rect(
397	vport->x, vport->y + ROW2Y(vport->rows),	397	vport->x, vport->y + ROW2Y(vport->rows),
398	vport->x + vport->width, vport->y + vport->height,	398	vport->x + vport->width, vport->y + vport->height,
399	vport->attr.bg_color);	399	vport->attr.bg_color);
400	}	400	}
401	}	401	}
402		402
403	static void backbuf_clear(bb_cell_t *backbuf, size_t len, uint32_t fg_color,	403	static void backbuf_clear(bb_cell_t *backbuf, size_t len, uint32_t fg_color,
404	uint32_t bg_color)	404	uint32_t bg_color)
405	{	405	{
406	size_t i;	406	size_t i;
407		407
408	for (i = 0; i < len; i++) {	408	for (i = 0; i < len; i++) {
409	backbuf[i].glyph = 0;	409	backbuf[i].glyph = 0;
410	backbuf[i].fg_color = fg_color;	410	backbuf[i].fg_color = fg_color;
411	backbuf[i].bg_color = bg_color;	411	backbuf[i].bg_color = bg_color;
412	}	412	}
413	}	413	}
414		414
415	/** Clear viewport.	415	/** Clear viewport.
416	*	416	*
417	* @param vport Viewport to clear	417	* @param vport Viewport to clear
418	*	418	*
419	*/	419	*/
420	static void vport_clear(viewport_t *vport)	420	static void vport_clear(viewport_t *vport)
421	{	421	{
422	backbuf_clear(vport->backbuf, vport->cols * vport->rows,	422	backbuf_clear(vport->backbuf, vport->cols * vport->rows,
423	vport->attr.fg_color, vport->attr.bg_color);	423	vport->attr.fg_color, vport->attr.bg_color);
424	vport_redraw(vport);	424	vport_redraw(vport);
425	}	425	}
426		426
427	/** Scroll viewport by the specified number of lines.	427	/** Scroll viewport by the specified number of lines.
428	*	428	*
429	* @param vport Viewport to scroll	429	* @param vport Viewport to scroll
430	* @param lines Number of lines to scroll	430	* @param lines Number of lines to scroll
431	*	431	*
432	*/	432	*/
433	static void vport_scroll(viewport_t *vport, int lines)	433	static void vport_scroll(viewport_t *vport, int lines)
434	{	434	{
435	unsigned int col;	435	unsigned int col;
436	unsigned int row;	436	unsigned int row;
437	unsigned int x;	437	unsigned int x;
438	unsigned int y;	438	unsigned int y;
439	uint32_t glyph;	439	uint32_t glyph;
440	uint32_t fg_color;	440	uint32_t fg_color;
441	uint32_t bg_color;	441	uint32_t bg_color;
442	bb_cell_t *bbp;	442	bb_cell_t *bbp;
443	bb_cell_t *xbp;	443	bb_cell_t *xbp;
444		444
445	/*	445	/*
446	* Redraw.	446	* Redraw.
447	*/	447	*/
448		448
449	y = vport->y;	449	y = vport->y;
450	for (row = 0; row < vport->rows; row++) {	450	for (row = 0; row < vport->rows; row++) {
451	x = vport->x;	451	x = vport->x;
452	for (col = 0; col < vport->cols; col++) {	452	for (col = 0; col < vport->cols; col++) {
-		453	if (((int) row + lines >= 0) &&
453	if ((row + lines >= 0) && (row + lines < vport->rows)) {	454	((int) row + lines < (int) vport->rows)) {
454	xbp = &vport->backbuf[BB_POS(vport, col, row + lines)];	455	xbp = &vport->backbuf[BB_POS(vport, col, row + lines)];
455	bbp = &vport->backbuf[BB_POS(vport, col, row)];	456	bbp = &vport->backbuf[BB_POS(vport, col, row)];
456		457
457	glyph = xbp->glyph;	458	glyph = xbp->glyph;
458	fg_color = xbp->fg_color;	459	fg_color = xbp->fg_color;
459	bg_color = xbp->bg_color;	460	bg_color = xbp->bg_color;
460		461
461	if ((bbp->glyph == glyph)	462	if ((bbp->glyph == glyph)
462	&& (bbp->fg_color == xbp->fg_color)	463	&& (bbp->fg_color == xbp->fg_color)
463	&& (bbp->bg_color == xbp->bg_color)) {	464	&& (bbp->bg_color == xbp->bg_color)) {
464	x += FONT_WIDTH;	465	x += FONT_WIDTH;
465	continue;	466	continue;
466	}	467	}
467	} else {	468	} else {
468	glyph = 0;	469	glyph = 0;
469	fg_color = vport->attr.fg_color;	470	fg_color = vport->attr.fg_color;
470	bg_color = vport->attr.bg_color;	471	bg_color = vport->attr.bg_color;
471	}	472	}
472		473
473	(*vport->dglyph)(x, y, false, screen.glyphs, glyph,	474	(*vport->dglyph)(x, y, false, screen.glyphs, glyph,
474	fg_color, bg_color);	475	fg_color, bg_color);
475	x += FONT_WIDTH;	476	x += FONT_WIDTH;
476	}	477	}
477	y += FONT_SCANLINES;	478	y += FONT_SCANLINES;
478	}	479	}
479		480
480	/*	481	/*
481	* Scroll backbuffer.	482	* Scroll backbuffer.
482	*/	483	*/
483		484
484	if (lines > 0) {	485	if (lines > 0) {
485	memmove(vport->backbuf, vport->backbuf + vport->cols * lines,	486	memmove(vport->backbuf, vport->backbuf + vport->cols * lines,
486	vport->cols * (vport->rows - lines) * sizeof(bb_cell_t));	487	vport->cols * (vport->rows - lines) * sizeof(bb_cell_t));
487	backbuf_clear(&vport->backbuf[BB_POS(vport, 0, vport->rows - lines)],	488	backbuf_clear(&vport->backbuf[BB_POS(vport, 0, vport->rows - lines)],
488	vport->cols * lines, vport->attr.fg_color, vport->attr.bg_color);	489	vport->cols * lines, vport->attr.fg_color, vport->attr.bg_color);
489	} else {	490	} else {
490	memmove(vport->backbuf - vport->cols * lines, vport->backbuf,	491	memmove(vport->backbuf - vport->cols * lines, vport->backbuf,
491	vport->cols * (vport->rows + lines) * sizeof(bb_cell_t));	492	vport->cols * (vport->rows + lines) * sizeof(bb_cell_t));
492	backbuf_clear(vport->backbuf, - vport->cols * lines,	493	backbuf_clear(vport->backbuf, - vport->cols * lines,
493	vport->attr.fg_color, vport->attr.bg_color);	494	vport->attr.fg_color, vport->attr.bg_color);
494	}	495	}
495	}	496	}
496		497
497	/** Render glyphs	498	/** Render glyphs
498	*	499	*
499	* Convert glyphs from device independent font	500	* Convert glyphs from device independent font

Subversion Repositories HelenOS

(root)/trunk/uspace/srv/fb/fb.c – Rev 4528 → 4548