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  1. /*
  2.  * Copyright (c) 2008 Martin Decky
  3.  * Copyright (c) 2006 Jakub Vana
  4.  * Copyright (c) 2006 Ondrej Palkovsky
  5.  * All rights reserved.
  6.  *
  7.  * Redistribution and use in source and binary forms, with or without
  8.  * modification, are permitted provided that the following conditions
  9.  * are met:
  10.  *
  11.  * - Redistributions of source code must retain the above copyright
  12.  *   notice, this list of conditions and the following disclaimer.
  13.  * - Redistributions in binary form must reproduce the above copyright
  14.  *   notice, this list of conditions and the following disclaimer in the
  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
  17.  *   derived from this software without specific prior written permission.
  18.  *
  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
  21.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  22.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  23.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  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
  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
  28.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  29.  */
  30.  
  31. /**
  32.  * @defgroup fb Graphical framebuffer
  33.  * @brief   HelenOS graphical framebuffer.
  34.  * @ingroup fbs
  35.  * @{
  36.  */
  37.  
  38. /** @file
  39.  */
  40.  
  41. #include <stdlib.h>
  42. #include <unistd.h>
  43. #include <string.h>
  44. #include <ddi.h>
  45. #include <sysinfo.h>
  46. #include <align.h>
  47. #include <as.h>
  48. #include <ipc/fb.h>
  49. #include <ipc/ipc.h>
  50. #include <ipc/ns.h>
  51. #include <ipc/services.h>
  52. #include <kernel/errno.h>
  53. #include <kernel/genarch/fb/visuals.h>
  54. #include <async.h>
  55. #include <bool.h>
  56.  
  57. #include "font-8x16.h"
  58. #include "fb.h"
  59. #include "main.h"
  60. #include "../console/screenbuffer.h"
  61. #include "ppm.h"
  62.  
  63. #include "pointer.xbm"
  64. #include "pointer_mask.xbm"
  65.  
  66. #define DEFAULT_BGCOLOR  0xf0f0f0
  67. #define DEFAULT_FGCOLOR  0x000000
  68.  
  69. #define MAX_ANIM_LEN     8
  70. #define MAX_ANIMATIONS   4
  71. #define MAX_PIXMAPS      256  /**< Maximum number of saved pixmaps */
  72. #define MAX_VIEWPORTS    128  /**< Viewport is a rectangular area on the screen */
  73.  
  74. typedef void (*rgb_conv_t)(void *, uint32_t);
  75.  
  76. struct {
  77.     uint8_t *fb_addr;
  78.    
  79.     unsigned int xres;
  80.     unsigned int yres;
  81.    
  82.     unsigned int scanline;
  83.     unsigned int glyphscanline;
  84.    
  85.     unsigned int pixelbytes;
  86.     unsigned int glyphbytes;
  87.    
  88.     rgb_conv_t rgb_conv;
  89. } screen;
  90.  
  91. typedef struct {
  92.     bool initialized;
  93.     unsigned int x;
  94.     unsigned int y;
  95.     unsigned int width;
  96.     unsigned int height;
  97.    
  98.     /* Text support in window */
  99.     unsigned int cols;
  100.     unsigned int rows;
  101.    
  102.     /* Style and glyphs for text printing */
  103.     style_t style;
  104.     uint8_t *glyphs;
  105.     uint8_t *bgpixel;
  106.    
  107.     /* Auto-cursor position */
  108.     bool cursor_active;
  109.     unsigned int cur_col;
  110.     unsigned int cur_row;
  111.     bool cursor_shown;
  112.    
  113.     /* Back buffer */
  114.     unsigned int bbsize;
  115.     uint8_t *backbuf;
  116. } viewport_t;
  117.  
  118. typedef struct {
  119.     bool initialized;
  120.     bool enabled;
  121.     unsigned int vp;
  122.    
  123.     unsigned int pos;
  124.     unsigned int animlen;
  125.     unsigned int pixmaps[MAX_ANIM_LEN];
  126. } animation_t;
  127.  
  128. static animation_t animations[MAX_ANIMATIONS];
  129. static bool anims_enabled;
  130.  
  131. typedef struct {
  132.     unsigned int width;
  133.     unsigned int height;
  134.     uint8_t *data;
  135. } pixmap_t;
  136.  
  137. static pixmap_t pixmaps[MAX_PIXMAPS];
  138. static viewport_t viewports[128];
  139.  
  140. static bool client_connected = false;  /**< Allow only 1 connection */
  141.  
  142. static void draw_glyph(viewport_t *vport, bool cursor, unsigned int col,
  143.     unsigned int row);
  144.  
  145.  
  146. #define RED(x, bits)                 ((x >> (8 + 8 + 8 - bits)) & ((1 << bits) - 1))
  147. #define GREEN(x, bits)               ((x >> (8 + 8 - bits)) & ((1 << bits) - 1))
  148. #define BLUE(x, bits)                ((x >> (8 - bits)) & ((1 << bits) - 1))
  149.  
  150. #define COL2X(col)                   ((col) * FONT_WIDTH)
  151. #define ROW2Y(row)                   ((row) * FONT_SCANLINES)
  152.  
  153. #define X2COL(x)                     ((x) / FONT_WIDTH)
  154. #define Y2ROW(y)                     ((y) / FONT_SCANLINES)
  155.  
  156. #define FB_POS(x, y)                 ((y) * screen.scanline + (x) * screen.pixelbytes)
  157. #define BB_POS(vport, col, row)      ((row) * vport->cols + (col))
  158. #define GLYPH_POS(glyph, y, cursor)  (((glyph) + (cursor) * FONT_GLYPHS) * screen.glyphbytes + (y) * screen.glyphscanline)
  159.  
  160.  
  161. /** ARGB 8:8:8:8 conversion
  162.  *
  163.  */
  164. static void rgb_0888(void *dst, uint32_t rgb)
  165. {
  166.     *((uint32_t *) dst) = rgb & 0xffffff;
  167. }
  168.  
  169.  
  170. /** ABGR 8:8:8:8 conversion
  171.  *
  172.  */
  173. static void bgr_0888(void *dst, uint32_t rgb)
  174. {
  175.     *((uint32_t *) dst)
  176.         = (BLUE(rgb, 8) << 16) | (GREEN(rgb, 8) << 8) | RED(rgb, 8);
  177. }
  178.  
  179.  
  180. /** BGR 8:8:8 conversion
  181.  *
  182.  */
  183. static void rgb_888(void *dst, uint32_t rgb)
  184. {
  185. #if defined(FB_INVERT_ENDIAN)
  186.     ((uint8_t *) dst)[0] = RED(rgb, 8);
  187.     ((uint8_t *) dst)[1] = GREEN(rgb, 8);
  188.     ((uint8_t *) dst)[2] = BLUE(rgb, 8);
  189. #else
  190.     ((uint8_t *) dst)[0] = BLUE(rgb, 8);
  191.     ((uint8_t *) dst)[1] = GREEN(rgb, 8);
  192.     ((uint8_t *) dst)[2] = RED(rgb, 8);
  193. #endif
  194. }
  195.  
  196.  
  197. /** RGB 5:5:5 conversion
  198.  *
  199.  */
  200. static void rgb_555(void *dst, uint32_t rgb)
  201. {
  202.     *((uint16_t *) dst)
  203.         = (RED(rgb, 5) << 10) | (GREEN(rgb, 5) << 5) | BLUE(rgb, 5);
  204. }
  205.  
  206.  
  207. /** RGB 5:6:5 conversion
  208.  *
  209.  */
  210. static void rgb_565(void *dst, uint32_t rgb)
  211. {
  212.     *((uint16_t *) dst)
  213.         = (RED(rgb, 5) << 11) | (GREEN(rgb, 6) << 5) | BLUE(rgb, 5);
  214. }
  215.  
  216.  
  217. /** RGB 3:2:3
  218.  *
  219.  */
  220. static void rgb_323(void *dst, uint32_t rgb)
  221. {
  222.     *((uint8_t *) dst)
  223.         = ~((RED(rgb, 3) << 5) | (GREEN(rgb, 2) << 3) | BLUE(rgb, 3));
  224. }
  225.  
  226. /** Draw a filled rectangle. */
  227. static void draw_filled_rect(unsigned int x0, unsigned int y0, unsigned int x1,
  228.     unsigned int y1, uint32_t color)
  229. {
  230.     unsigned int x, y;
  231.     uint8_t cbuf[4];
  232.  
  233.     screen.rgb_conv(cbuf, color);
  234.  
  235.     for (y = y0; y < y1; y++) {
  236.         for (x = x0; x < x1; x++) {
  237.             memcpy(&screen.fb_addr[FB_POS(x, y)], cbuf,
  238.                 screen.pixelbytes);
  239.         }
  240.     }
  241. }
  242.  
  243. /** Redraw viewport.
  244.  *
  245.  * @param vport Viewport to redraw
  246.  *
  247.  */
  248. static void vport_redraw(viewport_t *vport)
  249. {
  250.     unsigned int row, col;
  251.  
  252.     for (row = 0; row < vport->rows; row++) {
  253.         for (col = 0; col < vport->cols; col++) {
  254.             draw_glyph(vport, false, col, row);
  255.         }
  256.     }
  257.  
  258.     if (COL2X(vport->cols) < vport->width) {
  259.         draw_filled_rect(
  260.             vport->x + COL2X(vport->cols), vport->y,
  261.             vport->x + vport->width, vport->y + vport->height,
  262.             vport->style.bg_color);
  263.     }
  264.  
  265.     if (ROW2Y(vport->rows) < vport->height) {
  266.         draw_filled_rect(
  267.             vport->x, vport->y + ROW2Y(vport->rows),
  268.             vport->x + vport->width, vport->y + vport->height,
  269.             vport->style.bg_color);
  270.     }
  271. }
  272.  
  273.  
  274. /** Clear viewport.
  275.  *
  276.  * @param vport Viewport to clear
  277.  *
  278.  */
  279. static void vport_clear(viewport_t *vport)
  280. {
  281.     memset(vport->backbuf, 0, vport->bbsize);
  282.     vport_redraw(vport);
  283. }
  284.  
  285. /** Scroll viewport by the specified number of lines.
  286.  *
  287.  * @param vport Viewport to scroll
  288.  * @param lines Number of lines to scroll
  289.  *
  290.  */
  291. static void vport_scroll(viewport_t *vport, int lines)
  292. {
  293.     /*
  294.      * Scroll backbuffer.
  295.      */
  296.  
  297.     if (lines > 0) {
  298.         memmove(vport->backbuf, vport->backbuf + vport->cols * lines,
  299.             vport->cols * (vport->rows - lines));
  300.         memset(&vport->backbuf[BB_POS(vport, 0, vport->rows - lines)],
  301.             0, vport->cols * lines);
  302.     } else {
  303.         memmove(vport->backbuf - vport->cols * lines, vport->backbuf,
  304.             vport->cols * (vport->rows + lines));
  305.         memset(vport->backbuf, 0, - vport->cols * lines);
  306.     }
  307.  
  308.     /*
  309.      * Scroll pixels.
  310.      */
  311.  
  312.     unsigned int dist, height, alines;
  313.     unsigned int y, ry;
  314.     uint8_t *sp, *dp;
  315.  
  316.     alines = lines > 0 ? lines : -lines;
  317.     dist = alines * FONT_SCANLINES;
  318.     height = (vport->rows - alines) * FONT_SCANLINES;
  319.  
  320.     if (lines > 0) {
  321.         dp = &screen.fb_addr[FB_POS(vport->x, vport->y + 0)];
  322.         sp = &screen.fb_addr[FB_POS(vport->x, vport->y + dist)];
  323.         ry = height;
  324.     } else {
  325.         dp = &screen.fb_addr[FB_POS(vport->x, vport->y + dist)];
  326.         sp = &screen.fb_addr[FB_POS(vport->x, vport->y + 0)];
  327.         ry = 0;
  328.     }
  329.  
  330.     /* Move pixels line by line. */
  331.     for (y = 0; y < height; y++) {
  332.         memcpy(dp, sp, vport->cols * FONT_WIDTH
  333.             * screen.pixelbytes);
  334.  
  335.         sp += screen.scanline;
  336.         dp += screen.scanline;
  337.     }
  338.  
  339.     /* Fill emptied area with background color. */
  340.     draw_filled_rect(vport->x, vport->y + ry,
  341.         vport->x + COL2X(vport->cols), vport->y + ry + dist,
  342.         vport->style.bg_color);
  343. }
  344.  
  345. /** Render glyphs
  346.  *
  347.  * Convert glyphs from device independent font
  348.  * description to current visual representation.
  349.  *
  350.  * @param vport Viewport
  351.  *
  352.  */
  353. static void render_glyphs(viewport_t* vport)
  354. {
  355.     unsigned int glyph;
  356.    
  357.     for (glyph = 0; glyph < FONT_GLYPHS; glyph++) {
  358.         unsigned int y;
  359.        
  360.         for (y = 0; y < FONT_SCANLINES; y++) {
  361.             unsigned int x;
  362.            
  363.             for (x = 0; x < FONT_WIDTH; x++) {
  364.                 screen.rgb_conv(&vport->glyphs[GLYPH_POS(glyph, y, false) + x * screen.pixelbytes],
  365.                     (fb_font[glyph * FONT_SCANLINES + y] & (1 << (7 - x)))
  366.                     ? vport->style.fg_color : vport->style.bg_color);
  367.                
  368.                 uint32_t curcolor;
  369.                
  370.                 if (y < FONT_SCANLINES - 2)
  371.                     curcolor =
  372.                         (fb_font[glyph * FONT_SCANLINES + y] & (1 << (7 - x)))
  373.                         ? vport->style.fg_color : vport->style.bg_color;
  374.                 else
  375.                     curcolor = vport->style.fg_color;
  376.                
  377.                 screen.rgb_conv(&vport->glyphs[GLYPH_POS(glyph, y, true) + x * screen.pixelbytes], curcolor);
  378.             }
  379.         }
  380.     }
  381.    
  382.     screen.rgb_conv(vport->bgpixel, vport->style.bg_color);
  383. }
  384.  
  385.  
  386. /** Create new viewport
  387.  *
  388.  * @param x      Origin of the viewport (x).
  389.  * @param y      Origin of the viewport (y).
  390.  * @param width  Width of the viewport.
  391.  * @param height Height of the viewport.
  392.  *
  393.  * @return New viewport number.
  394.  *
  395.  */
  396. static int vport_create(unsigned int x, unsigned int y,
  397.     unsigned int width, unsigned int height)
  398. {
  399.     unsigned int i;
  400.    
  401.     for (i = 0; i < MAX_VIEWPORTS; i++) {
  402.         if (!viewports[i].initialized)
  403.             break;
  404.     }
  405.     if (i == MAX_VIEWPORTS)
  406.         return ELIMIT;
  407.    
  408.     unsigned int cols = width / FONT_WIDTH;
  409.     unsigned int rows = height / FONT_SCANLINES;
  410.     unsigned int bbsize = cols * rows;
  411.     unsigned int glyphsize = 2 * FONT_GLYPHS * screen.glyphbytes;
  412.    
  413.     uint8_t *backbuf = (uint8_t *) malloc(bbsize);
  414.     if (!backbuf)
  415.         return ENOMEM;
  416.    
  417.     uint8_t *glyphs = (uint8_t *) malloc(glyphsize);
  418.     if (!glyphs) {
  419.         free(backbuf);
  420.         return ENOMEM;
  421.     }
  422.    
  423.     uint8_t *bgpixel = (uint8_t *) malloc(screen.pixelbytes);
  424.     if (!bgpixel) {
  425.         free(glyphs);
  426.         free(backbuf);
  427.         return ENOMEM;
  428.     }
  429.    
  430.     memset(backbuf, 0, bbsize);
  431.     memset(glyphs, 0, glyphsize);
  432.     memset(bgpixel, 0, screen.pixelbytes);
  433.    
  434.     viewports[i].x = x;
  435.     viewports[i].y = y;
  436.     viewports[i].width = width;
  437.     viewports[i].height = height;
  438.    
  439.     viewports[i].cols = cols;
  440.     viewports[i].rows = rows;
  441.    
  442.     viewports[i].style.bg_color = DEFAULT_BGCOLOR;
  443.     viewports[i].style.fg_color = DEFAULT_FGCOLOR;
  444.    
  445.     viewports[i].glyphs = glyphs;
  446.     viewports[i].bgpixel = bgpixel;
  447.    
  448.     viewports[i].cur_col = 0;
  449.     viewports[i].cur_row = 0;
  450.     viewports[i].cursor_active = false;
  451.     viewports[i].cursor_shown = false;
  452.    
  453.     viewports[i].bbsize = bbsize;
  454.     viewports[i].backbuf = backbuf;
  455.    
  456.     viewports[i].initialized = true;
  457.    
  458.     render_glyphs(&viewports[i]);
  459.    
  460.     return i;
  461. }
  462.  
  463.  
  464. /** Initialize framebuffer as a chardev output device
  465.  *
  466.  * @param addr   Address of the framebuffer
  467.  * @param xres   Screen width in pixels
  468.  * @param yres   Screen height in pixels
  469.  * @param visual Bits per pixel (8, 16, 24, 32)
  470.  * @param scan   Bytes per one scanline
  471.  *
  472.  */
  473. static bool screen_init(void *addr, unsigned int xres, unsigned int yres,
  474.     unsigned int scan, unsigned int visual)
  475. {
  476.     switch (visual) {
  477.     case VISUAL_INDIRECT_8:
  478.         screen.rgb_conv = rgb_323;
  479.         screen.pixelbytes = 1;
  480.         break;
  481.     case VISUAL_RGB_5_5_5:
  482.         screen.rgb_conv = rgb_555;
  483.         screen.pixelbytes = 2;
  484.         break;
  485.     case VISUAL_RGB_5_6_5:
  486.         screen.rgb_conv = rgb_565;
  487.         screen.pixelbytes = 2;
  488.         break;
  489.     case VISUAL_RGB_8_8_8:
  490.         screen.rgb_conv = rgb_888;
  491.         screen.pixelbytes = 3;
  492.         break;
  493.     case VISUAL_RGB_8_8_8_0:
  494.         screen.rgb_conv = rgb_888;
  495.         screen.pixelbytes = 4;
  496.         break;
  497.     case VISUAL_RGB_0_8_8_8:
  498.         screen.rgb_conv = rgb_0888;
  499.         screen.pixelbytes = 4;
  500.         break;
  501.     case VISUAL_BGR_0_8_8_8:
  502.         screen.rgb_conv = bgr_0888;
  503.         screen.pixelbytes = 4;
  504.         break;
  505.     default:
  506.         return false;
  507.     }
  508.  
  509.     screen.fb_addr = (unsigned char *) addr;
  510.     screen.xres = xres;
  511.     screen.yres = yres;
  512.     screen.scanline = scan;
  513.    
  514.     screen.glyphscanline = FONT_WIDTH * screen.pixelbytes;
  515.     screen.glyphbytes = screen.glyphscanline * FONT_SCANLINES;
  516.    
  517.     /* Create first viewport */
  518.     vport_create(0, 0, xres, yres);
  519.    
  520.     return true;
  521. }
  522.  
  523.  
  524. /** Draw glyph at given position relative to viewport
  525.  *
  526.  * @param vport  Viewport identification
  527.  * @param cursor Draw glyph with cursor
  528.  * @param col    Screen position relative to viewport
  529.  * @param row    Screen position relative to viewport
  530.  *
  531.  */
  532. static void draw_glyph(viewport_t *vport, bool cursor, unsigned int col, unsigned int row)
  533. {
  534.     unsigned int x = vport->x + COL2X(col);
  535.     unsigned int y = vport->y + ROW2Y(row);
  536.     unsigned int yd;
  537.    
  538.     uint8_t glyph = vport->backbuf[BB_POS(vport, col, row)];
  539.    
  540.     for (yd = 0; yd < FONT_SCANLINES; yd++)
  541.         memcpy(&screen.fb_addr[FB_POS(x, y + yd)],
  542.             &vport->glyphs[GLYPH_POS(glyph, yd, cursor)], screen.glyphscanline);
  543. }
  544.  
  545.  
  546. /** Hide cursor if it is shown
  547.  *
  548.  */
  549. static void cursor_hide(viewport_t *vport)
  550. {
  551.     if ((vport->cursor_active) && (vport->cursor_shown)) {
  552.         draw_glyph(vport, false, vport->cur_col, vport->cur_row);
  553.         vport->cursor_shown = false;
  554.     }
  555. }
  556.  
  557.  
  558. /** Show cursor if cursor showing is enabled
  559.  *
  560.  */
  561. static void cursor_show(viewport_t *vport)
  562. {
  563.     /* Do not check for cursor_shown */
  564.     if (vport->cursor_active) {
  565.         draw_glyph(vport, true, vport->cur_col, vport->cur_row);
  566.         vport->cursor_shown = true;
  567.     }
  568. }
  569.  
  570.  
  571. /** Invert cursor, if it is enabled
  572.  *
  573.  */
  574. static void cursor_blink(viewport_t *vport)
  575. {
  576.     if (vport->cursor_shown)
  577.         cursor_hide(vport);
  578.     else
  579.         cursor_show(vport);
  580. }
  581.  
  582.  
  583. /** Draw character at given position relative to viewport
  584.  *
  585.  * @param vport  Viewport identification
  586.  * @param c      Character to draw
  587.  * @param col    Screen position relative to viewport
  588.  * @param row    Screen position relative to viewport
  589.  *
  590.  */
  591. static void draw_char(viewport_t *vport, uint8_t c, unsigned int col, unsigned int row)
  592. {
  593.     /* Do not hide cursor if we are going to overwrite it */
  594.     if ((vport->cursor_active) && (vport->cursor_shown) &&
  595.         ((vport->cur_col != col) || (vport->cur_row != row)))
  596.         cursor_hide(vport);
  597.    
  598.     vport->backbuf[BB_POS(vport, col, row)] = c;
  599.     draw_glyph(vport, false, col, row);
  600.    
  601.     vport->cur_col = col;
  602.     vport->cur_row = row;
  603.    
  604.     vport->cur_col++;
  605.     if (vport->cur_col >= vport->cols) {
  606.         vport->cur_col = 0;
  607.         vport->cur_row++;
  608.         if (vport->cur_row >= vport->rows)
  609.             vport->cur_row--;
  610.     }
  611.    
  612.     cursor_show(vport);
  613. }
  614.  
  615.  
  616. /** Draw text data to viewport
  617.  *
  618.  * @param vport Viewport id
  619.  * @param data  Text data fitting exactly into viewport
  620.  *
  621.  */
  622. static void draw_text_data(viewport_t *vport, keyfield_t *data)
  623. {
  624.     unsigned int i;
  625.    
  626.     for (i = 0; i < vport->cols * vport->rows; i++) {
  627.         unsigned int col = i % vport->cols;
  628.         unsigned int row = i / vport->cols;
  629.        
  630.         uint8_t glyph = vport->backbuf[BB_POS(vport, col, row)];
  631.        
  632.         // TODO: use data[i].style
  633.        
  634.         if (glyph != data[i].character) {
  635.             vport->backbuf[BB_POS(vport, col, row)] = data[i].character;
  636.             draw_glyph(vport, false, col, row);
  637.         }
  638.     }
  639.     cursor_show(vport);
  640. }
  641.  
  642.  
  643. static void putpixel_pixmap(void *data, unsigned int x, unsigned int y, uint32_t color)
  644. {
  645.     int pm = *((int *) data);
  646.     pixmap_t *pmap = &pixmaps[pm];
  647.     unsigned int pos = (y * pmap->width + x) * screen.pixelbytes;
  648.    
  649.     screen.rgb_conv(&pmap->data[pos], color);
  650. }
  651.  
  652.  
  653. static void putpixel(void *data, unsigned int x, unsigned int y, uint32_t color)
  654. {
  655.     viewport_t *vport = (viewport_t *) data;
  656.     unsigned int dx = vport->x + x;
  657.     unsigned int dy = vport->y + y;
  658.    
  659.     screen.rgb_conv(&screen.fb_addr[FB_POS(dx, dy)], color);
  660. }
  661.  
  662.  
  663. /** Return first free pixmap
  664.  *
  665.  */
  666. static int find_free_pixmap(void)
  667. {
  668.     unsigned int i;
  669.    
  670.     for (i = 0; i < MAX_PIXMAPS; i++)
  671.         if (!pixmaps[i].data)
  672.             return i;
  673.    
  674.     return -1;
  675. }
  676.  
  677.  
  678. /** Create a new pixmap and return appropriate ID
  679.  *
  680.  */
  681. static int shm2pixmap(unsigned char *shm, size_t size)
  682. {
  683.     int pm;
  684.     pixmap_t *pmap;
  685.    
  686.     pm = find_free_pixmap();
  687.     if (pm == -1)
  688.         return ELIMIT;
  689.    
  690.     pmap = &pixmaps[pm];
  691.    
  692.     if (ppm_get_data(shm, size, &pmap->width, &pmap->height))
  693.         return EINVAL;
  694.    
  695.     pmap->data = malloc(pmap->width * pmap->height * screen.pixelbytes);
  696.     if (!pmap->data)
  697.         return ENOMEM;
  698.    
  699.     ppm_draw(shm, size, 0, 0, pmap->width, pmap->height, putpixel_pixmap, (void *) &pm);
  700.    
  701.     return pm;
  702. }
  703.  
  704.  
  705. /** Handle shared memory communication calls
  706.  *
  707.  * Protocol for drawing pixmaps:
  708.  * - FB_PREPARE_SHM(client shm identification)
  709.  * - IPC_M_AS_AREA_SEND
  710.  * - FB_DRAW_PPM(startx, starty)
  711.  * - FB_DROP_SHM
  712.  *
  713.  * Protocol for text drawing
  714.  * - IPC_M_AS_AREA_SEND
  715.  * - FB_DRAW_TEXT_DATA
  716.  *
  717.  * @param callid Callid of the current call
  718.  * @param call   Current call data
  719.  * @param vp     Active viewport
  720.  *
  721.  * @return false if the call was not handled byt this function, true otherwise
  722.  *
  723.  * Note: this function is not threads safe, you would have
  724.  * to redefine static variables with __thread
  725.  *
  726.  */
  727. static bool shm_handle(ipc_callid_t callid, ipc_call_t *call, int vp)
  728. {
  729.     static keyfield_t *interbuffer = NULL;
  730.     static size_t intersize = 0;
  731.    
  732.     static unsigned char *shm = NULL;
  733.     static ipcarg_t shm_id = 0;
  734.     static size_t shm_size;
  735.    
  736.     bool handled = true;
  737.     int retval = EOK;
  738.     viewport_t *vport = &viewports[vp];
  739.     unsigned int x;
  740.     unsigned int y;
  741.    
  742.     switch (IPC_GET_METHOD(*call)) {
  743.     case IPC_M_SHARE_OUT:
  744.         /* We accept one area for data interchange */
  745.         if (IPC_GET_ARG1(*call) == shm_id) {
  746.             void *dest = as_get_mappable_page(IPC_GET_ARG2(*call));
  747.             shm_size = IPC_GET_ARG2(*call);
  748.             if (!ipc_answer_1(callid, EOK, (sysarg_t) dest))
  749.                 shm = dest;
  750.             else
  751.                 shm_id = 0;
  752.            
  753.             if (shm[0] != 'P')
  754.                 return false;
  755.            
  756.             return true;
  757.         } else {
  758.             intersize = IPC_GET_ARG2(*call);
  759.             receive_comm_area(callid, call, (void *) &interbuffer);
  760.         }
  761.         return true;
  762.     case FB_PREPARE_SHM:
  763.         if (shm_id)
  764.             retval = EBUSY;
  765.         else
  766.             shm_id = IPC_GET_ARG1(*call);
  767.         break;
  768.        
  769.     case FB_DROP_SHM:
  770.         if (shm) {
  771.             as_area_destroy(shm);
  772.             shm = NULL;
  773.         }
  774.         shm_id = 0;
  775.         break;
  776.        
  777.     case FB_SHM2PIXMAP:
  778.         if (!shm) {
  779.             retval = EINVAL;
  780.             break;
  781.         }
  782.         retval = shm2pixmap(shm, shm_size);
  783.         break;
  784.     case FB_DRAW_PPM:
  785.         if (!shm) {
  786.             retval = EINVAL;
  787.             break;
  788.         }
  789.         x = IPC_GET_ARG1(*call);
  790.         y = IPC_GET_ARG2(*call);
  791.        
  792.         if ((x > vport->width) || (y > vport->height)) {
  793.             retval = EINVAL;
  794.             break;
  795.         }
  796.        
  797.         ppm_draw(shm, shm_size, IPC_GET_ARG1(*call),
  798.             IPC_GET_ARG2(*call), vport->width - x, vport->height - y, putpixel, (void *) vport);
  799.         break;
  800.     case FB_DRAW_TEXT_DATA:
  801.         if (!interbuffer) {
  802.             retval = EINVAL;
  803.             break;
  804.         }
  805.         if (intersize < vport->cols * vport->rows * sizeof(*interbuffer)) {
  806.             retval = EINVAL;
  807.             break;
  808.         }
  809.         draw_text_data(vport, interbuffer);
  810.         break;
  811.     default:
  812.         handled = false;
  813.     }
  814.    
  815.     if (handled)
  816.         ipc_answer_0(callid, retval);
  817.     return handled;
  818. }
  819.  
  820.  
  821. static void copy_vp_to_pixmap(viewport_t *vport, pixmap_t *pmap)
  822. {
  823.     unsigned int width = vport->width;
  824.     unsigned int height = vport->height;
  825.    
  826.     if (width + vport->x > screen.xres)
  827.         width = screen.xres - vport->x;
  828.     if (height + vport->y > screen.yres)
  829.         height = screen.yres - vport->y;
  830.    
  831.     unsigned int realwidth = pmap->width <= width ? pmap->width : width;
  832.     unsigned int realheight = pmap->height <= height ? pmap->height : height;
  833.    
  834.     unsigned int srcrowsize = vport->width * screen.pixelbytes;
  835.     unsigned int realrowsize = realwidth * screen.pixelbytes;
  836.    
  837.     unsigned int y;
  838.     for (y = 0; y < realheight; y++) {
  839.         unsigned int tmp = (vport->y + y) * screen.scanline + vport->x * screen.pixelbytes;
  840.         memcpy(pmap->data + srcrowsize * y, screen.fb_addr + tmp, realrowsize);
  841.     }
  842. }
  843.  
  844.  
  845. /** Save viewport to pixmap
  846.  *
  847.  */
  848. static int save_vp_to_pixmap(viewport_t *vport)
  849. {
  850.     int pm;
  851.     pixmap_t *pmap;
  852.    
  853.     pm = find_free_pixmap();
  854.     if (pm == -1)
  855.         return ELIMIT;
  856.    
  857.     pmap = &pixmaps[pm];
  858.     pmap->data = malloc(screen.pixelbytes * vport->width * vport->height);
  859.     if (!pmap->data)
  860.         return ENOMEM;
  861.    
  862.     pmap->width = vport->width;
  863.     pmap->height = vport->height;
  864.    
  865.     copy_vp_to_pixmap(vport, pmap);
  866.    
  867.     return pm;
  868. }
  869.  
  870.  
  871. /** Draw pixmap on screen
  872.  *
  873.  * @param vp Viewport to draw on
  874.  * @param pm Pixmap identifier
  875.  *
  876.  */
  877. static int draw_pixmap(int vp, int pm)
  878. {
  879.     pixmap_t *pmap = &pixmaps[pm];
  880.     viewport_t *vport = &viewports[vp];
  881.    
  882.     unsigned int width = vport->width;
  883.     unsigned int height = vport->height;
  884.    
  885.     if (width + vport->x > screen.xres)
  886.         width = screen.xres - vport->x;
  887.     if (height + vport->y > screen.yres)
  888.         height = screen.yres - vport->y;
  889.    
  890.     if (!pmap->data)
  891.         return EINVAL;
  892.    
  893.     unsigned int realwidth = pmap->width <= width ? pmap->width : width;
  894.     unsigned int realheight = pmap->height <= height ? pmap->height : height;
  895.    
  896.     unsigned int srcrowsize = vport->width * screen.pixelbytes;
  897.     unsigned int realrowsize = realwidth * screen.pixelbytes;
  898.    
  899.     unsigned int y;
  900.     for (y = 0; y < realheight; y++) {
  901.         unsigned int tmp = (vport->y + y) * screen.scanline + vport->x * screen.pixelbytes;
  902.         memcpy(screen.fb_addr + tmp, pmap->data + y * srcrowsize, realrowsize);
  903.     }
  904.    
  905.     return EOK;
  906. }
  907.  
  908.  
  909. /** Tick animation one step forward
  910.  *
  911.  */
  912. static void anims_tick(void)
  913. {
  914.     unsigned int i;
  915.     static int counts = 0;
  916.    
  917.     /* Limit redrawing */
  918.     counts = (counts + 1) % 8;
  919.     if (counts)
  920.         return;
  921.  
  922.     for (i = 0; i < MAX_ANIMATIONS; i++) {
  923.         if ((!animations[i].animlen) || (!animations[i].initialized) ||
  924.             (!animations[i].enabled))
  925.             continue;
  926.        
  927.         draw_pixmap(animations[i].vp, animations[i].pixmaps[animations[i].pos]);
  928.         animations[i].pos = (animations[i].pos + 1) % animations[i].animlen;
  929.     }
  930. }
  931.  
  932.  
  933. static unsigned int pointer_x;
  934. static unsigned int pointer_y;
  935. static bool pointer_shown, pointer_enabled;
  936. static int pointer_vport = -1;
  937. static int pointer_pixmap = -1;
  938.  
  939.  
  940. static void mouse_show(void)
  941. {
  942.     int i, j;
  943.     int visibility;
  944.     int color;
  945.     int bytepos;
  946.    
  947.     if ((pointer_shown) || (!pointer_enabled))
  948.         return;
  949.    
  950.     /* Save image under the pointer. */
  951.     if (pointer_vport == -1) {
  952.         pointer_vport = vport_create(pointer_x, pointer_y, pointer_width, pointer_height);
  953.         if (pointer_vport < 0)
  954.             return;
  955.     } else {
  956.         viewports[pointer_vport].x = pointer_x;
  957.         viewports[pointer_vport].y = pointer_y;
  958.     }
  959.    
  960.     if (pointer_pixmap == -1)
  961.         pointer_pixmap = save_vp_to_pixmap(&viewports[pointer_vport]);
  962.     else
  963.         copy_vp_to_pixmap(&viewports[pointer_vport], &pixmaps[pointer_pixmap]);
  964.    
  965.     /* Draw mouse pointer. */
  966.     for (i = 0; i < pointer_height; i++)
  967.         for (j = 0; j < pointer_width; j++) {
  968.             bytepos = i * ((pointer_width - 1) / 8 + 1) + j / 8;
  969.             visibility = pointer_mask_bits[bytepos] &
  970.                 (1 << (j % 8));
  971.             if (visibility) {
  972.                 color = pointer_bits[bytepos] &
  973.                     (1 << (j % 8)) ? 0 : 0xffffff;
  974.                 if (pointer_x + j < screen.xres && pointer_y +
  975.                     i < screen.yres)
  976.                     putpixel(&viewports[0], pointer_x + j,
  977.                         pointer_y + i, color);
  978.             }
  979.         }
  980.     pointer_shown = 1;
  981. }
  982.  
  983.  
  984. static void mouse_hide(void)
  985. {
  986.     /* Restore image under the pointer. */
  987.     if (pointer_shown) {
  988.         draw_pixmap(pointer_vport, pointer_pixmap);
  989.         pointer_shown = 0;
  990.     }
  991. }
  992.  
  993.  
  994. static void mouse_move(unsigned int x, unsigned int y)
  995. {
  996.     mouse_hide();
  997.     pointer_x = x;
  998.     pointer_y = y;
  999.     mouse_show();
  1000. }
  1001.  
  1002.  
  1003. static int anim_handle(ipc_callid_t callid, ipc_call_t *call, int vp)
  1004. {
  1005.     bool handled = true;
  1006.     int retval = EOK;
  1007.     int i, nvp;
  1008.     int newval;
  1009.    
  1010.     switch (IPC_GET_METHOD(*call)) {
  1011.     case FB_ANIM_CREATE:
  1012.         nvp = IPC_GET_ARG1(*call);
  1013.         if (nvp == -1)
  1014.             nvp = vp;
  1015.         if (nvp >= MAX_VIEWPORTS || nvp < 0 ||
  1016.             !viewports[nvp].initialized) {
  1017.             retval = EINVAL;
  1018.             break;
  1019.         }
  1020.         for (i = 0; i < MAX_ANIMATIONS; i++) {
  1021.             if (!animations[i].initialized)
  1022.                 break;
  1023.         }
  1024.         if (i == MAX_ANIMATIONS) {
  1025.             retval = ELIMIT;
  1026.             break;
  1027.         }
  1028.         animations[i].initialized = 1;
  1029.         animations[i].animlen = 0;
  1030.         animations[i].pos = 0;
  1031.         animations[i].enabled = 0;
  1032.         animations[i].vp = nvp;
  1033.         retval = i;
  1034.         break;
  1035.     case FB_ANIM_DROP:
  1036.         i = IPC_GET_ARG1(*call);
  1037.         if (i >= MAX_ANIMATIONS || i < 0) {
  1038.             retval = EINVAL;
  1039.             break;
  1040.         }
  1041.         animations[i].initialized = 0;
  1042.         break;
  1043.     case FB_ANIM_ADDPIXMAP:
  1044.         i = IPC_GET_ARG1(*call);
  1045.         if (i >= MAX_ANIMATIONS || i < 0 ||
  1046.             !animations[i].initialized) {
  1047.             retval = EINVAL;
  1048.             break;
  1049.         }
  1050.         if (animations[i].animlen == MAX_ANIM_LEN) {
  1051.             retval = ELIMIT;
  1052.             break;
  1053.         }
  1054.         newval = IPC_GET_ARG2(*call);
  1055.         if (newval < 0 || newval > MAX_PIXMAPS ||
  1056.             !pixmaps[newval].data) {
  1057.             retval = EINVAL;
  1058.             break;
  1059.         }
  1060.         animations[i].pixmaps[animations[i].animlen++] = newval;
  1061.         break;
  1062.     case FB_ANIM_CHGVP:
  1063.         i = IPC_GET_ARG1(*call);
  1064.         if (i >= MAX_ANIMATIONS || i < 0) {
  1065.             retval = EINVAL;
  1066.             break;
  1067.         }
  1068.         nvp = IPC_GET_ARG2(*call);
  1069.         if (nvp == -1)
  1070.             nvp = vp;
  1071.         if (nvp >= MAX_VIEWPORTS || nvp < 0 ||
  1072.             !viewports[nvp].initialized) {
  1073.             retval = EINVAL;
  1074.             break;
  1075.         }
  1076.         animations[i].vp = nvp;
  1077.         break;
  1078.     case FB_ANIM_START:
  1079.     case FB_ANIM_STOP:
  1080.         i = IPC_GET_ARG1(*call);
  1081.         if (i >= MAX_ANIMATIONS || i < 0) {
  1082.             retval = EINVAL;
  1083.             break;
  1084.         }
  1085.         newval = (IPC_GET_METHOD(*call) == FB_ANIM_START);
  1086.         if (newval ^ animations[i].enabled) {
  1087.             animations[i].enabled = newval;
  1088.             anims_enabled += newval ? 1 : -1;
  1089.         }
  1090.         break;
  1091.     default:
  1092.         handled = 0;
  1093.     }
  1094.     if (handled)
  1095.         ipc_answer_0(callid, retval);
  1096.     return handled;
  1097. }
  1098.  
  1099.  
  1100. /** Handler for messages concerning pixmap handling
  1101.  *
  1102.  */
  1103. static int pixmap_handle(ipc_callid_t callid, ipc_call_t *call, int vp)
  1104. {
  1105.     bool handled = true;
  1106.     int retval = EOK;
  1107.     int i, nvp;
  1108.    
  1109.     switch (IPC_GET_METHOD(*call)) {
  1110.     case FB_VP_DRAW_PIXMAP:
  1111.         nvp = IPC_GET_ARG1(*call);
  1112.         if (nvp == -1)
  1113.             nvp = vp;
  1114.         if (nvp < 0 || nvp >= MAX_VIEWPORTS ||
  1115.             !viewports[nvp].initialized) {
  1116.             retval = EINVAL;
  1117.             break;
  1118.         }
  1119.         i = IPC_GET_ARG2(*call);
  1120.         retval = draw_pixmap(nvp, i);
  1121.         break;
  1122.     case FB_VP2PIXMAP:
  1123.         nvp = IPC_GET_ARG1(*call);
  1124.         if (nvp == -1)
  1125.             nvp = vp;
  1126.         if (nvp < 0 || nvp >= MAX_VIEWPORTS ||
  1127.             !viewports[nvp].initialized)
  1128.             retval = EINVAL;
  1129.         else
  1130.             retval = save_vp_to_pixmap(&viewports[nvp]);
  1131.         break;
  1132.     case FB_DROP_PIXMAP:
  1133.         i = IPC_GET_ARG1(*call);
  1134.         if (i >= MAX_PIXMAPS) {
  1135.             retval = EINVAL;
  1136.             break;
  1137.         }
  1138.         if (pixmaps[i].data) {
  1139.             free(pixmaps[i].data);
  1140.             pixmaps[i].data = NULL;
  1141.         }
  1142.         break;
  1143.     default:
  1144.         handled = 0;
  1145.     }
  1146.    
  1147.     if (handled)
  1148.         ipc_answer_0(callid, retval);
  1149.     return handled;
  1150.    
  1151. }
  1152.  
  1153. /** Function for handling connections to FB
  1154.  *
  1155.  */
  1156. static void fb_client_connection(ipc_callid_t iid, ipc_call_t *icall)
  1157. {
  1158.     unsigned int vp = 0;
  1159.     viewport_t *vport = &viewports[vp];
  1160.    
  1161.     if (client_connected) {
  1162.         ipc_answer_0(iid, ELIMIT);
  1163.         return;
  1164.     }
  1165.    
  1166.     /* Accept connection */
  1167.     client_connected = true;
  1168.     ipc_answer_0(iid, EOK);
  1169.    
  1170.     while (true) {
  1171.         ipc_callid_t callid;
  1172.         ipc_call_t call;
  1173.         int retval;
  1174.         unsigned int i;
  1175.         int scroll;
  1176.         uint8_t glyph;
  1177.         unsigned int row, col;
  1178.        
  1179.         if ((vport->cursor_active) || (anims_enabled))
  1180.             callid = async_get_call_timeout(&call, 250000);
  1181.         else
  1182.             callid = async_get_call(&call);
  1183.        
  1184.         mouse_hide();
  1185.         if (!callid) {
  1186.             cursor_blink(vport);
  1187.             anims_tick();
  1188.             mouse_show();
  1189.             continue;
  1190.         }
  1191.        
  1192.         if (shm_handle(callid, &call, vp))
  1193.             continue;
  1194.        
  1195.         if (pixmap_handle(callid, &call, vp))
  1196.             continue;
  1197.        
  1198.         if (anim_handle(callid, &call, vp))
  1199.             continue;
  1200.        
  1201.         switch (IPC_GET_METHOD(call)) {
  1202.         case IPC_M_PHONE_HUNGUP:
  1203.             client_connected = false;
  1204.            
  1205.             /* Cleanup other viewports */
  1206.             for (i = 1; i < MAX_VIEWPORTS; i++)
  1207.                 vport->initialized = false;
  1208.            
  1209.             /* Exit thread */
  1210.             return;
  1211.        
  1212.         case FB_PUTCHAR:
  1213.             glyph = IPC_GET_ARG1(call);
  1214.             row = IPC_GET_ARG2(call);
  1215.             col = IPC_GET_ARG3(call);
  1216.            
  1217.             if ((col >= vport->cols) || (row >= vport->rows)) {
  1218.                 retval = EINVAL;
  1219.                 break;
  1220.             }
  1221.             ipc_answer_0(callid, EOK);
  1222.            
  1223.             draw_char(vport, glyph, col, row);
  1224.            
  1225.             /* Message already answered */
  1226.             continue;
  1227.         case FB_CLEAR:
  1228.             vport_clear(vport);
  1229.             cursor_show(vport);
  1230.             retval = EOK;
  1231.             break;
  1232.         case FB_CURSOR_GOTO:
  1233.             row = IPC_GET_ARG1(call);
  1234.             col = IPC_GET_ARG2(call);
  1235.            
  1236.             if ((col >= vport->cols) || (row >= vport->rows)) {
  1237.                 retval = EINVAL;
  1238.                 break;
  1239.             }
  1240.             retval = EOK;
  1241.            
  1242.             cursor_hide(vport);
  1243.             vport->cur_col = col;
  1244.             vport->cur_row = row;
  1245.             cursor_show(vport);
  1246.             break;
  1247.         case FB_CURSOR_VISIBILITY:
  1248.             cursor_hide(vport);
  1249.             vport->cursor_active = IPC_GET_ARG1(call);
  1250.             cursor_show(vport);
  1251.             retval = EOK;
  1252.             break;
  1253.         case FB_GET_CSIZE:
  1254.             ipc_answer_2(callid, EOK, vport->rows, vport->cols);
  1255.             continue;
  1256.         case FB_SCROLL:
  1257.             scroll = IPC_GET_ARG1(call);
  1258.             if ((scroll > (int) vport->rows) || (scroll < (-(int) vport->rows))) {
  1259.                 retval = EINVAL;
  1260.                 break;
  1261.             }
  1262.             cursor_hide(vport);
  1263.             vport_scroll(vport, scroll);
  1264.             cursor_show(vport);
  1265.             retval = EOK;
  1266.             break;
  1267.         case FB_VIEWPORT_SWITCH:
  1268.             i = IPC_GET_ARG1(call);
  1269.             if (i >= MAX_VIEWPORTS) {
  1270.                 retval = EINVAL;
  1271.                 break;
  1272.             }
  1273.             if (!viewports[i].initialized) {
  1274.                 retval = EADDRNOTAVAIL;
  1275.                 break;
  1276.             }
  1277.             cursor_hide(vport);
  1278.             vp = i;
  1279.             vport = &viewports[vp];
  1280.             cursor_show(vport);
  1281.             retval = EOK;
  1282.             break;
  1283.         case FB_VIEWPORT_CREATE:
  1284.             retval = vport_create(IPC_GET_ARG1(call) >> 16,
  1285.                 IPC_GET_ARG1(call) & 0xffff,
  1286.                 IPC_GET_ARG2(call) >> 16,
  1287.                 IPC_GET_ARG2(call) & 0xffff);
  1288.             break;
  1289.         case FB_VIEWPORT_DELETE:
  1290.             i = IPC_GET_ARG1(call);
  1291.             if (i >= MAX_VIEWPORTS) {
  1292.                 retval = EINVAL;
  1293.                 break;
  1294.             }
  1295.             if (!viewports[i].initialized) {
  1296.                 retval = EADDRNOTAVAIL;
  1297.                 break;
  1298.             }
  1299.             viewports[i].initialized = false;
  1300.             if (viewports[i].glyphs)
  1301.                 free(viewports[i].glyphs);
  1302.             if (viewports[i].bgpixel)
  1303.                 free(viewports[i].bgpixel);
  1304.             if (viewports[i].backbuf)
  1305.                 free(viewports[i].backbuf);
  1306.             retval = EOK;
  1307.             break;
  1308.         case FB_SET_STYLE:
  1309.             vport->style.fg_color = IPC_GET_ARG1(call);
  1310.             vport->style.bg_color = IPC_GET_ARG2(call);
  1311.             render_glyphs(vport);
  1312.             retval = EOK;
  1313.             break;
  1314.         case FB_GET_RESOLUTION:
  1315.             ipc_answer_2(callid, EOK, screen.xres, screen.yres);
  1316.             continue;
  1317.         case FB_POINTER_MOVE:
  1318.             pointer_enabled = true;
  1319.             mouse_move(IPC_GET_ARG1(call), IPC_GET_ARG2(call));
  1320.             retval = EOK;
  1321.             break;
  1322.         default:
  1323.             retval = ENOENT;
  1324.         }
  1325.         ipc_answer_0(callid, retval);
  1326.     }
  1327. }
  1328.  
  1329. /** Initialization of framebuffer
  1330.  *
  1331.  */
  1332. int fb_init(void)
  1333. {
  1334.     async_set_client_connection(fb_client_connection);
  1335.    
  1336.     void *fb_ph_addr = (void *) sysinfo_value("fb.address.physical");
  1337.     unsigned int fb_offset = sysinfo_value("fb.offset");
  1338.     unsigned int fb_width = sysinfo_value("fb.width");
  1339.     unsigned int fb_height = sysinfo_value("fb.height");
  1340.     unsigned int fb_scanline = sysinfo_value("fb.scanline");
  1341.     unsigned int fb_visual = sysinfo_value("fb.visual");
  1342.    
  1343.     unsigned int fbsize = fb_scanline * fb_height;
  1344.     void *fb_addr = as_get_mappable_page(fbsize);
  1345.    
  1346.     physmem_map(fb_ph_addr + fb_offset, fb_addr,
  1347.         ALIGN_UP(fbsize, PAGE_SIZE) >> PAGE_WIDTH, AS_AREA_READ | AS_AREA_WRITE);
  1348.    
  1349.     if (screen_init(fb_addr, fb_width, fb_height, fb_scanline, fb_visual))
  1350.         return 0;
  1351.    
  1352.     return -1;
  1353. }
  1354.  
  1355. /**
  1356.  * @}
  1357.  */
  1358.