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