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