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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 <io/color.h>
  55. #include <io/style.h>
  56. #include <async.h>
  57. #include <fibril.h>
  58. #include <bool.h>
  59. #include <stdio.h>
  60.  
  61. #include "font-8x16.h"
  62. #include "fb.h"
  63. #include "main.h"
  64. #include "../console/screenbuffer.h"
  65. #include "ppm.h"
  66.  
  67. #include "pointer.xbm"
  68. #include "pointer_mask.xbm"
  69.  
  70. #define DEFAULT_BGCOLOR  0xf0f0f0
  71. #define DEFAULT_FGCOLOR  0x000000
  72.  
  73. #define GLYPH_UNAVAIL    '?'
  74.  
  75. #define MAX_ANIM_LEN     8
  76. #define MAX_ANIMATIONS   4
  77. #define MAX_PIXMAPS      256  /**< Maximum number of saved pixmaps */
  78. #define MAX_VIEWPORTS    128  /**< Viewport is a rectangular area on the screen */
  79.  
  80. /** Function to render a pixel from a RGB value. */
  81. typedef void (*rgb_conv_t)(void *, uint32_t);
  82.  
  83. /** Function to render a bit mask. */
  84. typedef void (*mask_conv_t)(void *, bool);
  85.  
  86. /** Function to draw a glyph. */
  87. typedef void (*dg_t)(unsigned int x, unsigned int y, bool cursor,
  88.     uint8_t *glyphs, uint32_t glyph, uint32_t fg_color, uint32_t bg_color);
  89.  
  90. struct {
  91.     uint8_t *fb_addr;
  92.    
  93.     unsigned int xres;
  94.     unsigned int yres;
  95.    
  96.     unsigned int scanline;
  97.     unsigned int glyphscanline;
  98.    
  99.     unsigned int pixelbytes;
  100.     unsigned int glyphbytes;
  101.    
  102.     /** Pre-rendered mask for rendering glyphs. Specific for the visual. */
  103.     uint8_t *glyphs;
  104.    
  105.     rgb_conv_t rgb_conv;
  106.     mask_conv_t mask_conv;
  107. } screen;
  108.  
  109. /** Backbuffer character cell. */
  110. typedef struct {
  111.     uint32_t glyph;
  112.     uint32_t fg_color;
  113.     uint32_t bg_color;
  114. } bb_cell_t;
  115.  
  116. typedef struct {
  117.     bool initialized;
  118.     unsigned int x;
  119.     unsigned int y;
  120.     unsigned int width;
  121.     unsigned int height;
  122.    
  123.     /* Text support in window */
  124.     unsigned int cols;
  125.     unsigned int rows;
  126.    
  127.     /*
  128.      * Style and glyphs for text printing
  129.      */
  130.    
  131.     /** Current attributes. */
  132.     attr_rgb_t attr;
  133.    
  134.     uint8_t *bgpixel;
  135.    
  136.     /**
  137.      * Glyph drawing function for this viewport.  Different viewports
  138.      * might use different drawing functions depending on whether their
  139.      * scanlines are aligned on a word boundary.
  140.      */
  141.     dg_t dglyph;
  142.    
  143.     /* Auto-cursor position */
  144.     bool cursor_active;
  145.     unsigned int cur_col;
  146.     unsigned int cur_row;
  147.     bool cursor_shown;
  148.    
  149.     /* Back buffer */
  150.     bb_cell_t *backbuf;
  151.     unsigned int bbsize;
  152. } viewport_t;
  153.  
  154. typedef struct {
  155.     bool initialized;
  156.     bool enabled;
  157.     unsigned int vp;
  158.    
  159.     unsigned int pos;
  160.     unsigned int animlen;
  161.     unsigned int pixmaps[MAX_ANIM_LEN];
  162. } animation_t;
  163.  
  164. static animation_t animations[MAX_ANIMATIONS];
  165. static bool anims_enabled;
  166.  
  167. typedef struct {
  168.     unsigned int width;
  169.     unsigned int height;
  170.     uint8_t *data;
  171. } pixmap_t;
  172.  
  173. static pixmap_t pixmaps[MAX_PIXMAPS];
  174. static viewport_t viewports[128];
  175.  
  176. static bool client_connected = false;  /**< Allow only 1 connection */
  177.  
  178. static uint32_t color_table[16] = {
  179.     [COLOR_BLACK]       = 0x000000,
  180.     [COLOR_BLUE]        = 0x0000f0,
  181.     [COLOR_GREEN]       = 0x00f000,
  182.     [COLOR_CYAN]        = 0x00f0f0,
  183.     [COLOR_RED]         = 0xf00000,
  184.     [COLOR_MAGENTA]     = 0xf000f0,
  185.     [COLOR_YELLOW]      = 0xf0f000,
  186.     [COLOR_WHITE]       = 0xf0f0f0,
  187.    
  188.     [8 + COLOR_BLACK]   = 0x000000,
  189.     [8 + COLOR_BLUE]    = 0x0000ff,
  190.     [8 + COLOR_GREEN]   = 0x00ff00,
  191.     [8 + COLOR_CYAN]    = 0x00ffff,
  192.     [8 + COLOR_RED]     = 0xff0000,
  193.     [8 + COLOR_MAGENTA] = 0xff00ff,
  194.     [8 + COLOR_YELLOW]  = 0xffff00,
  195.     [8 + COLOR_WHITE]   = 0xffffff,
  196. };
  197.  
  198. static int rgb_from_attr(attr_rgb_t *rgb, const attrs_t *a);
  199. static int rgb_from_style(attr_rgb_t *rgb, int style);
  200. static int rgb_from_idx(attr_rgb_t *rgb, ipcarg_t fg_color,
  201.     ipcarg_t bg_color, ipcarg_t flags);
  202.  
  203. static int fb_set_color(viewport_t *vport, ipcarg_t fg_color,
  204.     ipcarg_t bg_color, ipcarg_t attr);
  205.  
  206. static void draw_glyph_aligned(unsigned int x, unsigned int y, bool cursor,
  207.     uint8_t *glyphs, uint32_t glyph, uint32_t fg_color, uint32_t bg_color);
  208. static void draw_glyph_fallback(unsigned int x, unsigned int y, bool cursor,
  209.     uint8_t *glyphs, uint32_t glyph, uint32_t fg_color, uint32_t bg_color);
  210.  
  211. static void draw_vp_glyph(viewport_t *vport, bool cursor, unsigned int col,
  212.     unsigned int row);
  213.  
  214.  
  215. #define RED(x, bits)                 ((x >> (8 + 8 + 8 - bits)) & ((1 << bits) - 1))
  216. #define GREEN(x, bits)               ((x >> (8 + 8 - bits)) & ((1 << bits) - 1))
  217. #define BLUE(x, bits)                ((x >> (8 - bits)) & ((1 << bits) - 1))
  218.  
  219. #define COL2X(col)                   ((col) * FONT_WIDTH)
  220. #define ROW2Y(row)                   ((row) * FONT_SCANLINES)
  221.  
  222. #define X2COL(x)                     ((x) / FONT_WIDTH)
  223. #define Y2ROW(y)                     ((y) / FONT_SCANLINES)
  224.  
  225. #define FB_POS(x, y)                 ((y) * screen.scanline + (x) * screen.pixelbytes)
  226. #define BB_POS(vport, col, row)      ((row) * vport->cols + (col))
  227. #define GLYPH_POS(glyph, y, cursor)  (((glyph) + (cursor) * FONT_GLYPHS) * screen.glyphbytes + (y) * screen.glyphscanline)
  228.  
  229.  
  230. /** ARGB 8:8:8:8 conversion
  231.  *
  232.  */
  233. static void rgb_0888(void *dst, uint32_t rgb)
  234. {
  235.     *((uint32_t *) dst) = rgb & 0x00ffffff;
  236. }
  237.  
  238. static void mask_0888(void *dst, bool mask)
  239. {
  240.     *((uint32_t *) dst) = (mask ? 0x00ffffff : 0);
  241. }
  242.  
  243.  
  244. /** ABGR 8:8:8:8 conversion
  245.  *
  246.  */
  247. static void bgr_0888(void *dst, uint32_t rgb)
  248. {
  249.     *((uint32_t *) dst)
  250.         = (BLUE(rgb, 8) << 16) | (GREEN(rgb, 8) << 8) | RED(rgb, 8);
  251. }
  252.  
  253.  
  254. /** RGB 8:8:8 conversion
  255.  *
  256.  */
  257. static void rgb_888(void *dst, uint32_t rgb)
  258. {
  259.     ((uint8_t *) dst)[0] = BLUE(rgb, 8);
  260.     ((uint8_t *) dst)[1] = GREEN(rgb, 8);
  261.     ((uint8_t *) dst)[2] = RED(rgb, 8);
  262. }
  263.  
  264. static void mask_888(void *dst, bool mask)
  265. {
  266.     if (mask) {
  267.         ((uint8_t *) dst)[0] = 0xff;
  268.         ((uint8_t *) dst)[1] = 0xff;
  269.         ((uint8_t *) dst)[2] = 0xff;
  270.     } else {
  271.         ((uint8_t *) dst)[0] = 0;
  272.         ((uint8_t *) dst)[1] = 0;
  273.         ((uint8_t *) dst)[2] = 0;
  274.     }
  275. }
  276.  
  277.  
  278. /** BGR 8:8:8 conversion
  279.  *
  280.  */
  281. static void bgr_888(void *dst, uint32_t rgb)
  282. {
  283.     ((uint8_t *) dst)[0] = RED(rgb, 8);
  284.     ((uint8_t *) dst)[1] = GREEN(rgb, 8);
  285.     ((uint8_t *) dst)[2] = BLUE(rgb, 8);
  286. }
  287.  
  288.  
  289. /** RGB 5:5:5 conversion
  290.  *
  291.  */
  292. static void rgb_555(void *dst, uint32_t rgb)
  293. {
  294.     *((uint16_t *) dst)
  295.         = (RED(rgb, 5) << 10) | (GREEN(rgb, 5) << 5) | BLUE(rgb, 5);
  296. }
  297.  
  298. static void mask_555(void *dst, bool mask)
  299. {
  300.     *((uint16_t *) dst) = (mask ? 0x7fff : 0);
  301. }
  302.  
  303.  
  304. /** RGB 5:6:5 conversion
  305.  *
  306.  */
  307. static void rgb_565(void *dst, uint32_t rgb)
  308. {
  309.     *((uint16_t *) dst)
  310.         = (RED(rgb, 5) << 11) | (GREEN(rgb, 6) << 5) | BLUE(rgb, 5);
  311. }
  312.  
  313. static void mask_565(void *dst, bool mask)
  314. {
  315.     *((uint16_t *) dst) = (mask ? 0xffff : 0);
  316. }
  317.  
  318.  
  319. /** RGB 3:2:3
  320.  *
  321.  */
  322. static void rgb_323(void *dst, uint32_t rgb)
  323. {
  324.     *((uint8_t *) dst)
  325.         = ~((RED(rgb, 3) << 5) | (GREEN(rgb, 2) << 3) | BLUE(rgb, 3));
  326. }
  327.  
  328. static void mask_323(void *dst, bool mask)
  329. {
  330.     *((uint8_t *) dst) = (mask ? 0xff : 0);
  331. }
  332.  
  333. /** Draw a filled rectangle.
  334.  *
  335.  * @note Need real implementation that does not access VRAM twice.
  336.  *
  337.  */
  338. static void draw_filled_rect(unsigned int x0, unsigned int y0, unsigned int x1,
  339.     unsigned int y1, uint32_t color)
  340. {
  341.     unsigned int x;
  342.     unsigned int y;
  343.     unsigned int copy_bytes;
  344.    
  345.     uint8_t *sp;
  346.     uint8_t *dp;
  347.     uint8_t cbuf[4];
  348.    
  349.     if ((y0 >= y1) || (x0 >= x1))
  350.         return;
  351.    
  352.     screen.rgb_conv(cbuf, color);
  353.    
  354.     sp = &screen.fb_addr[FB_POS(x0, y0)];
  355.     dp = sp;
  356.    
  357.     /* Draw the first line. */
  358.     for (x = x0; x < x1; x++) {
  359.         memcpy(dp, cbuf, screen.pixelbytes);
  360.         dp += screen.pixelbytes;
  361.     }
  362.    
  363.     dp = sp + screen.scanline;
  364.     copy_bytes = (x1 - x0) * screen.pixelbytes;
  365.    
  366.     /* Draw the remaining lines by copying. */
  367.     for (y = y0 + 1; y < y1; y++) {
  368.         memcpy(dp, sp, copy_bytes);
  369.         dp += screen.scanline;
  370.     }
  371. }
  372.  
  373. /** Redraw viewport.
  374.  *
  375.  * @param vport Viewport to redraw
  376.  *
  377.  */
  378. static void vport_redraw(viewport_t *vport)
  379. {
  380.     unsigned int col;
  381.     unsigned int row;
  382.    
  383.     for (row = 0; row < vport->rows; row++) {
  384.         for (col = 0; col < vport->cols; col++) {
  385.             draw_vp_glyph(vport, false, col, row);
  386.         }
  387.     }
  388.    
  389.     if (COL2X(vport->cols) < vport->width) {
  390.         draw_filled_rect(
  391.             vport->x + COL2X(vport->cols), vport->y,
  392.             vport->x + vport->width, vport->y + vport->height,
  393.             vport->attr.bg_color);
  394.     }
  395.    
  396.     if (ROW2Y(vport->rows) < vport->height) {
  397.         draw_filled_rect(
  398.             vport->x, vport->y + ROW2Y(vport->rows),
  399.             vport->x + vport->width, vport->y + vport->height,
  400.             vport->attr.bg_color);
  401.     }
  402. }
  403.  
  404. static void backbuf_clear(bb_cell_t *backbuf, size_t len, uint32_t fg_color,
  405.     uint32_t bg_color)
  406. {
  407.     size_t i;
  408.    
  409.     for (i = 0; i < len; i++) {
  410.         backbuf[i].glyph = 0;
  411.         backbuf[i].fg_color = fg_color;
  412.         backbuf[i].bg_color = bg_color;
  413.     }
  414. }
  415.  
  416. /** Clear viewport.
  417.  *
  418.  * @param vport Viewport to clear
  419.  *
  420.  */
  421. static void vport_clear(viewport_t *vport)
  422. {
  423.     backbuf_clear(vport->backbuf, vport->cols * vport->rows,
  424.         vport->attr.fg_color, vport->attr.bg_color);
  425.     vport_redraw(vport);
  426. }
  427.  
  428. /** Scroll viewport by the specified number of lines.
  429.  *
  430.  * @param vport Viewport to scroll
  431.  * @param lines Number of lines to scroll
  432.  *
  433.  */
  434. static void vport_scroll(viewport_t *vport, int lines)
  435. {
  436.     unsigned int col;
  437.     unsigned int row;
  438.     unsigned int x;
  439.     unsigned int y;
  440.     uint32_t glyph;
  441.     uint32_t fg_color;
  442.     uint32_t bg_color;
  443.     bb_cell_t *bbp;
  444.     bb_cell_t *xbp;
  445.    
  446.     /*
  447.      * Redraw.
  448.      */
  449.    
  450.     y = vport->y;
  451.     for (row = 0; row < vport->rows; row++) {
  452.         x = vport->x;
  453.         for (col = 0; col < vport->cols; col++) {
  454.             if (((int) row + lines >= 0) &&
  455.                 ((int) row + lines < (int) vport->rows)) {
  456.                 xbp = &vport->backbuf[BB_POS(vport, col, row + lines)];
  457.                 bbp = &vport->backbuf[BB_POS(vport, col, row)];
  458.                
  459.                 glyph = xbp->glyph;
  460.                 fg_color = xbp->fg_color;
  461.                 bg_color = xbp->bg_color;
  462.                
  463.                 if ((bbp->glyph == glyph)
  464.                    && (bbp->fg_color == xbp->fg_color)
  465.                    && (bbp->bg_color == xbp->bg_color)) {
  466.                     x += FONT_WIDTH;
  467.                     continue;
  468.                 }
  469.             } else {
  470.                 glyph = 0;
  471.                 fg_color = vport->attr.fg_color;
  472.                 bg_color = vport->attr.bg_color;
  473.             }
  474.            
  475.             (*vport->dglyph)(x, y, false, screen.glyphs, glyph,
  476.                 fg_color, bg_color);
  477.             x += FONT_WIDTH;
  478.         }
  479.         y += FONT_SCANLINES;
  480.     }
  481.    
  482.     /*
  483.      * Scroll backbuffer.
  484.      */
  485.    
  486.     if (lines > 0) {
  487.         memmove(vport->backbuf, vport->backbuf + vport->cols * lines,
  488.             vport->cols * (vport->rows - lines) * sizeof(bb_cell_t));
  489.         backbuf_clear(&vport->backbuf[BB_POS(vport, 0, vport->rows - lines)],
  490.             vport->cols * lines, vport->attr.fg_color, vport->attr.bg_color);
  491.     } else {
  492.         memmove(vport->backbuf - vport->cols * lines, vport->backbuf,
  493.             vport->cols * (vport->rows + lines) * sizeof(bb_cell_t));
  494.         backbuf_clear(vport->backbuf, - vport->cols * lines,
  495.             vport->attr.fg_color, vport->attr.bg_color);
  496.     }
  497. }
  498.  
  499. /** Render glyphs
  500.  *
  501.  * Convert glyphs from device independent font
  502.  * description to current visual representation.
  503.  *
  504.  */
  505. static void render_glyphs(void)
  506. {
  507.     unsigned int glyph;
  508.    
  509.     for (glyph = 0; glyph < FONT_GLYPHS; glyph++) {
  510.         unsigned int y;
  511.        
  512.         for (y = 0; y < FONT_SCANLINES; y++) {
  513.             unsigned int x;
  514.            
  515.             for (x = 0; x < FONT_WIDTH; x++) {
  516.                 screen.mask_conv(&screen.glyphs[GLYPH_POS(glyph, y, false) + x * screen.pixelbytes],
  517.                     (fb_font[glyph][y] & (1 << (7 - x))) ? true : false);
  518.                
  519.                 screen.mask_conv(&screen.glyphs[GLYPH_POS(glyph, y, true) + x * screen.pixelbytes],
  520.                     (fb_font[glyph][y] & (1 << (7 - x))) ? false : true);
  521.             }
  522.         }
  523.     }
  524. }
  525.  
  526. /** Create new viewport
  527.  *
  528.  * @param x      Origin of the viewport (x).
  529.  * @param y      Origin of the viewport (y).
  530.  * @param width  Width of the viewport.
  531.  * @param height Height of the viewport.
  532.  *
  533.  * @return New viewport number.
  534.  *
  535.  */
  536. static int vport_create(unsigned int x, unsigned int y,
  537.     unsigned int width, unsigned int height)
  538. {
  539.     unsigned int i;
  540.    
  541.     for (i = 0; i < MAX_VIEWPORTS; i++) {
  542.         if (!viewports[i].initialized)
  543.             break;
  544.     }
  545.    
  546.     if (i == MAX_VIEWPORTS)
  547.         return ELIMIT;
  548.    
  549.     unsigned int cols = width / FONT_WIDTH;
  550.     unsigned int rows = height / FONT_SCANLINES;
  551.     unsigned int bbsize = cols * rows * sizeof(bb_cell_t);
  552.     unsigned int word_size = sizeof(unsigned long);
  553.    
  554.     bb_cell_t *backbuf = (bb_cell_t *) malloc(bbsize);
  555.     if (!backbuf)
  556.         return ENOMEM;
  557.    
  558.     uint8_t *bgpixel = (uint8_t *) malloc(screen.pixelbytes);
  559.     if (!bgpixel) {
  560.         free(backbuf);
  561.         return ENOMEM;
  562.     }
  563.    
  564.     backbuf_clear(backbuf, cols * rows, DEFAULT_FGCOLOR, DEFAULT_BGCOLOR);
  565.     memset(bgpixel, 0, screen.pixelbytes);
  566.    
  567.     viewports[i].x = x;
  568.     viewports[i].y = y;
  569.     viewports[i].width = width;
  570.     viewports[i].height = height;
  571.    
  572.     viewports[i].cols = cols;
  573.     viewports[i].rows = rows;
  574.    
  575.     viewports[i].attr.bg_color = DEFAULT_BGCOLOR;
  576.     viewports[i].attr.fg_color = DEFAULT_FGCOLOR;
  577.    
  578.     viewports[i].bgpixel = bgpixel;
  579.    
  580.     /*
  581.      * Conditions necessary to select aligned version:
  582.      *  - word size is divisible by pixelbytes
  583.      *  - cell scanline size is divisible by word size
  584.      *  - cell scanlines are word-aligned
  585.      *
  586.      */
  587.     if (((word_size % screen.pixelbytes) == 0)
  588.         && ((FONT_WIDTH * screen.pixelbytes) % word_size == 0)
  589.         && ((x * screen.pixelbytes) % word_size == 0)
  590.         && (screen.scanline % word_size == 0)) {
  591.         viewports[i].dglyph = draw_glyph_aligned;
  592.     } else {
  593.         viewports[i].dglyph = draw_glyph_fallback;
  594.     }
  595.    
  596.     viewports[i].cur_col = 0;
  597.     viewports[i].cur_row = 0;
  598.     viewports[i].cursor_active = false;
  599.     viewports[i].cursor_shown = false;
  600.    
  601.     viewports[i].bbsize = bbsize;
  602.     viewports[i].backbuf = backbuf;
  603.    
  604.     viewports[i].initialized = true;
  605.    
  606.     screen.rgb_conv(viewports[i].bgpixel, viewports[i].attr.bg_color);
  607.    
  608.     return i;
  609. }
  610.  
  611.  
  612. /** Initialize framebuffer as a chardev output device
  613.  *
  614.  * @param addr   Address of the framebuffer
  615.  * @param xres   Screen width in pixels
  616.  * @param yres   Screen height in pixels
  617.  * @param visual Bits per pixel (8, 16, 24, 32)
  618.  * @param scan   Bytes per one scanline
  619.  *
  620.  */
  621. static bool screen_init(void *addr, unsigned int xres, unsigned int yres,
  622.     unsigned int scan, unsigned int visual)
  623. {
  624.    
  625.    
  626.     switch (visual) {
  627.     case VISUAL_INDIRECT_8:
  628.         screen.rgb_conv = rgb_323;
  629.         screen.mask_conv = mask_323;
  630.         screen.pixelbytes = 1;
  631.         break;
  632.     case VISUAL_RGB_5_5_5:
  633.         screen.rgb_conv = rgb_555;
  634.         screen.mask_conv = mask_555;
  635.         screen.pixelbytes = 2;
  636.         break;
  637.     case VISUAL_RGB_5_6_5:
  638.         screen.rgb_conv = rgb_565;
  639.         screen.mask_conv = mask_565;
  640.         screen.pixelbytes = 2;
  641.         break;
  642.     case VISUAL_RGB_8_8_8:
  643.         screen.rgb_conv = rgb_888;
  644.         screen.mask_conv = mask_888;
  645.         screen.pixelbytes = 3;
  646.         break;
  647.     case VISUAL_BGR_8_8_8:
  648.         screen.rgb_conv = bgr_888;
  649.         screen.mask_conv = mask_888;
  650.         screen.pixelbytes = 3;
  651.         break;
  652.     case VISUAL_RGB_8_8_8_0:
  653.         screen.rgb_conv = rgb_888;
  654.         screen.mask_conv = mask_888;
  655.         screen.pixelbytes = 4;
  656.         break;
  657.     case VISUAL_RGB_0_8_8_8:
  658.         screen.rgb_conv = rgb_0888;
  659.         screen.mask_conv = mask_0888;
  660.         screen.pixelbytes = 4;
  661.         break;
  662.     case VISUAL_BGR_0_8_8_8:
  663.         screen.rgb_conv = bgr_0888;
  664.         screen.mask_conv = mask_0888;
  665.         screen.pixelbytes = 4;
  666.         break;
  667.     default:
  668.         return false;
  669.     }
  670.    
  671.     screen.fb_addr = (unsigned char *) addr;
  672.     screen.xres = xres;
  673.     screen.yres = yres;
  674.     screen.scanline = scan;
  675.    
  676.     screen.glyphscanline = FONT_WIDTH * screen.pixelbytes;
  677.     screen.glyphbytes = screen.glyphscanline * FONT_SCANLINES;
  678.    
  679.     size_t glyphsize = 2 * FONT_GLYPHS * screen.glyphbytes;
  680.     uint8_t *glyphs = (uint8_t *) malloc(glyphsize);
  681.     if (!glyphs)
  682.         return false;
  683.    
  684.     memset(glyphs, 0, glyphsize);
  685.     screen.glyphs = glyphs;
  686.    
  687.     render_glyphs();
  688.    
  689.     /* Create first viewport */
  690.     vport_create(0, 0, xres, yres);
  691.    
  692.     return true;
  693. }
  694.  
  695.  
  696. /** Draw a glyph, takes advantage of alignment.
  697.  *
  698.  * This version can only be used if the following conditions are met:
  699.  *
  700.  *   - word size is divisible by pixelbytes
  701.  *   - cell scanline size is divisible by word size
  702.  *   - cell scanlines are word-aligned
  703.  *
  704.  * It makes use of the pre-rendered mask to process (possibly) several
  705.  * pixels at once (word size / pixelbytes pixels at a time are processed)
  706.  * making it very fast. Most notably this version is not applicable at 24 bits
  707.  * per pixel.
  708.  *
  709.  * @param x        x coordinate of top-left corner on screen.
  710.  * @param y        y coordinate of top-left corner on screen.
  711.  * @param cursor   Draw glyph with cursor
  712.  * @param glyphs   Pointer to font bitmap.
  713.  * @param glyph    Code of the glyph to draw.
  714.  * @param fg_color Foreground color.
  715.  * @param bg_color Backgroudn color.
  716.  *
  717.  */
  718. static void draw_glyph_aligned(unsigned int x, unsigned int y, bool cursor,
  719.     uint8_t *glyphs, uint32_t glyph, uint32_t fg_color, uint32_t bg_color)
  720. {
  721.     unsigned int i;
  722.     unsigned int yd;
  723.     unsigned long fg_buf;
  724.     unsigned long bg_buf;
  725.     unsigned long mask;
  726.    
  727.     /*
  728.      * Prepare a pair of words, one filled with foreground-color
  729.      * pattern and the other filled with background-color pattern.
  730.      */
  731.     for (i = 0; i < sizeof(unsigned long) / screen.pixelbytes; i++) {
  732.         screen.rgb_conv(&((uint8_t *) &fg_buf)[i * screen.pixelbytes],
  733.             fg_color);
  734.         screen.rgb_conv(&((uint8_t *) &bg_buf)[i * screen.pixelbytes],
  735.             bg_color);
  736.     }
  737.    
  738.     /* Pointer to the current position in the mask. */
  739.     unsigned long *maskp = (unsigned long *) &glyphs[GLYPH_POS(glyph, 0, cursor)];
  740.    
  741.     /* Pointer to the current position on the screen. */
  742.     unsigned long *dp = (unsigned long *) &screen.fb_addr[FB_POS(x, y)];
  743.    
  744.     /* Width of the character cell in words. */
  745.     unsigned int ww = FONT_WIDTH * screen.pixelbytes / sizeof(unsigned long);
  746.    
  747.     /* Offset to add when moving to another screen scanline. */
  748.     unsigned int d_add = screen.scanline - FONT_WIDTH * screen.pixelbytes;
  749.    
  750.     for (yd = 0; yd < FONT_SCANLINES; yd++) {
  751.         /*
  752.          * Now process the cell scanline, combining foreground
  753.          * and background color patters using the pre-rendered mask.
  754.          */
  755.         for (i = 0; i < ww; i++) {
  756.             mask = *maskp++;
  757.             *dp++ = (fg_buf & mask) | (bg_buf & ~mask);
  758.         }
  759.        
  760.         /* Move to the beginning of the next scanline of the cell. */
  761.         dp = (unsigned long *) ((uint8_t *) dp + d_add);
  762.     }
  763. }
  764.  
  765. /** Draw a glyph, fallback version.
  766.  *
  767.  * This version does not make use of the pre-rendered mask, it uses
  768.  * the font bitmap directly. It works always, but it is slower.
  769.  *
  770.  * @param x        x coordinate of top-left corner on screen.
  771.  * @param y        y coordinate of top-left corner on screen.
  772.  * @param cursor   Draw glyph with cursor
  773.  * @param glyphs   Pointer to font bitmap.
  774.  * @param glyph    Code of the glyph to draw.
  775.  * @param fg_color Foreground color.
  776.  * @param bg_color Backgroudn color.
  777.  *
  778.  */
  779. void draw_glyph_fallback(unsigned int x, unsigned int y, bool cursor,
  780.     uint8_t *glyphs, uint32_t glyph, uint32_t fg_color, uint32_t bg_color)
  781. {
  782.     unsigned int i;
  783.     unsigned int j;
  784.     unsigned int yd;
  785.     uint8_t fg_buf[4];
  786.     uint8_t bg_buf[4];
  787.     uint8_t *sp;
  788.     uint8_t b;
  789.    
  790.     /* Pre-render 1x the foreground and background color pixels. */
  791.     if (cursor) {
  792.         screen.rgb_conv(fg_buf, bg_color);
  793.         screen.rgb_conv(bg_buf, fg_color);
  794.     } else {
  795.         screen.rgb_conv(fg_buf, fg_color);
  796.         screen.rgb_conv(bg_buf, bg_color);
  797.     }
  798.    
  799.     /* Pointer to the current position on the screen. */
  800.     uint8_t *dp = (uint8_t *) &screen.fb_addr[FB_POS(x, y)];
  801.    
  802.     /* Offset to add when moving to another screen scanline. */
  803.     unsigned int d_add = screen.scanline - FONT_WIDTH * screen.pixelbytes;
  804.    
  805.     for (yd = 0; yd < FONT_SCANLINES; yd++) {
  806.         /* Byte containing bits of the glyph scanline. */
  807.         b = fb_font[glyph][yd];
  808.        
  809.         for (i = 0; i < FONT_WIDTH; i++) {
  810.             /* Choose color based on the current bit. */
  811.             sp = (b & 0x80) ? fg_buf : bg_buf;
  812.            
  813.             /* Copy the pixel. */
  814.             for (j = 0; j < screen.pixelbytes; j++) {
  815.                 *dp++ = *sp++;
  816.             }
  817.            
  818.             /* Move to the next bit. */
  819.             b = b << 1;
  820.         }
  821.        
  822.         /* Move to the beginning of the next scanline of the cell. */
  823.         dp += d_add;
  824.     }
  825. }
  826.  
  827. /** Draw glyph at specified position in viewport.
  828.  *
  829.  * @param vport  Viewport identification
  830.  * @param cursor Draw glyph with cursor
  831.  * @param col    Screen position relative to viewport
  832.  * @param row    Screen position relative to viewport
  833.  *
  834.  */
  835. static void draw_vp_glyph(viewport_t *vport, bool cursor, unsigned int col,
  836.     unsigned int row)
  837. {
  838.     unsigned int x = vport->x + COL2X(col);
  839.     unsigned int y = vport->y + ROW2Y(row);
  840.    
  841.     uint32_t glyph = vport->backbuf[BB_POS(vport, col, row)].glyph;
  842.     uint32_t fg_color = vport->backbuf[BB_POS(vport, col, row)].fg_color;
  843.     uint32_t bg_color = vport->backbuf[BB_POS(vport, col, row)].bg_color;
  844.    
  845.     (*vport->dglyph)(x, y, cursor, screen.glyphs, glyph,
  846.         fg_color, bg_color);
  847. }
  848.  
  849. /** Hide cursor if it is shown
  850.  *
  851.  */
  852. static void cursor_hide(viewport_t *vport)
  853. {
  854.     if ((vport->cursor_active) && (vport->cursor_shown)) {
  855.         draw_vp_glyph(vport, false, vport->cur_col, vport->cur_row);
  856.         vport->cursor_shown = false;
  857.     }
  858. }
  859.  
  860.  
  861. /** Show cursor if cursor showing is enabled
  862.  *
  863.  */
  864. static void cursor_show(viewport_t *vport)
  865. {
  866.     /* Do not check for cursor_shown */
  867.     if (vport->cursor_active) {
  868.         draw_vp_glyph(vport, true, vport->cur_col, vport->cur_row);
  869.         vport->cursor_shown = true;
  870.     }
  871. }
  872.  
  873.  
  874. /** Invert cursor, if it is enabled
  875.  *
  876.  */
  877. static void cursor_blink(viewport_t *vport)
  878. {
  879.     if (vport->cursor_shown)
  880.         cursor_hide(vport);
  881.     else
  882.         cursor_show(vport);
  883. }
  884.  
  885.  
  886. /** Draw character at given position relative to viewport
  887.  *
  888.  * @param vport  Viewport identification
  889.  * @param c      Character to draw
  890.  * @param col    Screen position relative to viewport
  891.  * @param row    Screen position relative to viewport
  892.  *
  893.  */
  894. static void draw_char(viewport_t *vport, wchar_t c, unsigned int col, unsigned int row)
  895. {
  896.     bb_cell_t *bbp;
  897.    
  898.     /* Do not hide cursor if we are going to overwrite it */
  899.     if ((vport->cursor_active) && (vport->cursor_shown) &&
  900.         ((vport->cur_col != col) || (vport->cur_row != row)))
  901.         cursor_hide(vport);
  902.    
  903.     bbp = &vport->backbuf[BB_POS(vport, col, row)];
  904.     bbp->glyph = fb_font_glyph(c);
  905.     bbp->fg_color = vport->attr.fg_color;
  906.     bbp->bg_color = vport->attr.bg_color;
  907.    
  908.     draw_vp_glyph(vport, false, col, row);
  909.    
  910.     vport->cur_col = col;
  911.     vport->cur_row = row;
  912.    
  913.     vport->cur_col++;
  914.     if (vport->cur_col >= vport->cols) {
  915.         vport->cur_col = 0;
  916.         vport->cur_row++;
  917.         if (vport->cur_row >= vport->rows)
  918.             vport->cur_row--;
  919.     }
  920.    
  921.     cursor_show(vport);
  922. }
  923.  
  924. /** Draw text data to viewport.
  925.  *
  926.  * @param vport Viewport id
  927.  * @param data  Text data.
  928.  * @param x     Leftmost column of the area.
  929.  * @param y     Topmost row of the area.
  930.  * @param w     Number of rows.
  931.  * @param h     Number of columns.
  932.  *
  933.  */
  934. static void draw_text_data(viewport_t *vport, keyfield_t *data, unsigned int x,
  935.     unsigned int y, unsigned int w, unsigned int h)
  936. {
  937.     unsigned int i;
  938.     unsigned int j;
  939.     bb_cell_t *bbp;
  940.     attrs_t *a;
  941.     attr_rgb_t rgb;
  942.    
  943.     for (j = 0; j < h; j++) {
  944.         for (i = 0; i < w; i++) {
  945.             unsigned int col = x + i;
  946.             unsigned int row = y + j;
  947.            
  948.             bbp = &vport->backbuf[BB_POS(vport, col, row)];
  949.            
  950.             a = &data[j * w + i].attrs;
  951.             rgb_from_attr(&rgb, a);
  952.            
  953.             bbp->glyph = fb_font_glyph(data[j * w + i].character);
  954.             bbp->fg_color = rgb.fg_color;
  955.             bbp->bg_color = rgb.bg_color;
  956.            
  957.             draw_vp_glyph(vport, false, col, row);
  958.         }
  959.     }
  960.     cursor_show(vport);
  961. }
  962.  
  963.  
  964. static void putpixel_pixmap(void *data, unsigned int x, unsigned int y, uint32_t color)
  965. {
  966.     int pm = *((int *) data);
  967.     pixmap_t *pmap = &pixmaps[pm];
  968.     unsigned int pos = (y * pmap->width + x) * screen.pixelbytes;
  969.    
  970.     screen.rgb_conv(&pmap->data[pos], color);
  971. }
  972.  
  973.  
  974. static void putpixel(void *data, unsigned int x, unsigned int y, uint32_t color)
  975. {
  976.     viewport_t *vport = (viewport_t *) data;
  977.     unsigned int dx = vport->x + x;
  978.     unsigned int dy = vport->y + y;
  979.    
  980.     screen.rgb_conv(&screen.fb_addr[FB_POS(dx, dy)], color);
  981. }
  982.  
  983.  
  984. /** Return first free pixmap
  985.  *
  986.  */
  987. static int find_free_pixmap(void)
  988. {
  989.     unsigned int i;
  990.    
  991.     for (i = 0; i < MAX_PIXMAPS; i++)
  992.         if (!pixmaps[i].data)
  993.             return i;
  994.    
  995.     return -1;
  996. }
  997.  
  998.  
  999. /** Create a new pixmap and return appropriate ID
  1000.  *
  1001.  */
  1002. static int shm2pixmap(unsigned char *shm, size_t size)
  1003. {
  1004.     int pm;
  1005.     pixmap_t *pmap;
  1006.    
  1007.     pm = find_free_pixmap();
  1008.     if (pm == -1)
  1009.         return ELIMIT;
  1010.    
  1011.     pmap = &pixmaps[pm];
  1012.    
  1013.     if (ppm_get_data(shm, size, &pmap->width, &pmap->height))
  1014.         return EINVAL;
  1015.    
  1016.     pmap->data = malloc(pmap->width * pmap->height * screen.pixelbytes);
  1017.     if (!pmap->data)
  1018.         return ENOMEM;
  1019.    
  1020.     ppm_draw(shm, size, 0, 0, pmap->width, pmap->height, putpixel_pixmap, (void *) &pm);
  1021.    
  1022.     return pm;
  1023. }
  1024.  
  1025.  
  1026. /** Handle shared memory communication calls
  1027.  *
  1028.  * Protocol for drawing pixmaps:
  1029.  * - FB_PREPARE_SHM(client shm identification)
  1030.  * - IPC_M_AS_AREA_SEND
  1031.  * - FB_DRAW_PPM(startx, starty)
  1032.  * - FB_DROP_SHM
  1033.  *
  1034.  * Protocol for text drawing
  1035.  * - IPC_M_AS_AREA_SEND
  1036.  * - FB_DRAW_TEXT_DATA
  1037.  *
  1038.  * @param callid Callid of the current call
  1039.  * @param call   Current call data
  1040.  * @param vp     Active viewport
  1041.  *
  1042.  * @return false if the call was not handled byt this function, true otherwise
  1043.  *
  1044.  * Note: this function is not thread-safe, you would have
  1045.  * to redefine static variables with fibril_local.
  1046.  *
  1047.  */
  1048. static bool shm_handle(ipc_callid_t callid, ipc_call_t *call, int vp)
  1049. {
  1050.     static keyfield_t *interbuffer = NULL;
  1051.     static size_t intersize = 0;
  1052.    
  1053.     static unsigned char *shm = NULL;
  1054.     static ipcarg_t shm_id = 0;
  1055.     static size_t shm_size;
  1056.    
  1057.     bool handled = true;
  1058.     int retval = EOK;
  1059.     viewport_t *vport = &viewports[vp];
  1060.     unsigned int x;
  1061.     unsigned int y;
  1062.     unsigned int w;
  1063.     unsigned int h;
  1064.    
  1065.     switch (IPC_GET_METHOD(*call)) {
  1066.     case IPC_M_SHARE_OUT:
  1067.         /* We accept one area for data interchange */
  1068.         if (IPC_GET_ARG1(*call) == shm_id) {
  1069.             void *dest = as_get_mappable_page(IPC_GET_ARG2(*call));
  1070.             shm_size = IPC_GET_ARG2(*call);
  1071.             if (ipc_answer_1(callid, EOK, (sysarg_t) dest)) {
  1072.                 shm_id = 0;
  1073.                 return false;
  1074.             }
  1075.             shm = dest;
  1076.            
  1077.             if (shm[0] != 'P')
  1078.                 return false;
  1079.            
  1080.             return true;
  1081.         } else {
  1082.             intersize = IPC_GET_ARG2(*call);
  1083.             receive_comm_area(callid, call, (void *) &interbuffer);
  1084.         }
  1085.         return true;
  1086.     case FB_PREPARE_SHM:
  1087.         if (shm_id)
  1088.             retval = EBUSY;
  1089.         else
  1090.             shm_id = IPC_GET_ARG1(*call);
  1091.         break;
  1092.        
  1093.     case FB_DROP_SHM:
  1094.         if (shm) {
  1095.             as_area_destroy(shm);
  1096.             shm = NULL;
  1097.         }
  1098.         shm_id = 0;
  1099.         break;
  1100.        
  1101.     case FB_SHM2PIXMAP:
  1102.         if (!shm) {
  1103.             retval = EINVAL;
  1104.             break;
  1105.         }
  1106.         retval = shm2pixmap(shm, shm_size);
  1107.         break;
  1108.     case FB_DRAW_PPM:
  1109.         if (!shm) {
  1110.             retval = EINVAL;
  1111.             break;
  1112.         }
  1113.         x = IPC_GET_ARG1(*call);
  1114.         y = IPC_GET_ARG2(*call);
  1115.        
  1116.         if ((x > vport->width) || (y > vport->height)) {
  1117.             retval = EINVAL;
  1118.             break;
  1119.         }
  1120.        
  1121.         ppm_draw(shm, shm_size, IPC_GET_ARG1(*call),
  1122.             IPC_GET_ARG2(*call), vport->width - x, vport->height - y, putpixel, (void *) vport);
  1123.         break;
  1124.     case FB_DRAW_TEXT_DATA:
  1125.         x = IPC_GET_ARG1(*call);
  1126.         y = IPC_GET_ARG2(*call);
  1127.         w = IPC_GET_ARG3(*call);
  1128.         h = IPC_GET_ARG4(*call);
  1129.         if (!interbuffer) {
  1130.             retval = EINVAL;
  1131.             break;
  1132.         }
  1133.         if (x + w > vport->cols || y + h > vport->rows) {
  1134.             retval = EINVAL;
  1135.             break;
  1136.         }
  1137.         if (intersize < w * h * sizeof(*interbuffer)) {
  1138.             retval = EINVAL;
  1139.             break;
  1140.         }
  1141.         draw_text_data(vport, interbuffer, x, y, w, h);
  1142.         break;
  1143.     default:
  1144.         handled = false;
  1145.     }
  1146.    
  1147.     if (handled)
  1148.         ipc_answer_0(callid, retval);
  1149.     return handled;
  1150. }
  1151.  
  1152.  
  1153. static void copy_vp_to_pixmap(viewport_t *vport, pixmap_t *pmap)
  1154. {
  1155.     unsigned int width = vport->width;
  1156.     unsigned int height = vport->height;
  1157.    
  1158.     if (width + vport->x > screen.xres)
  1159.         width = screen.xres - vport->x;
  1160.     if (height + vport->y > screen.yres)
  1161.         height = screen.yres - vport->y;
  1162.    
  1163.     unsigned int realwidth = pmap->width <= width ? pmap->width : width;
  1164.     unsigned int realheight = pmap->height <= height ? pmap->height : height;
  1165.    
  1166.     unsigned int srcrowsize = vport->width * screen.pixelbytes;
  1167.     unsigned int realrowsize = realwidth * screen.pixelbytes;
  1168.    
  1169.     unsigned int y;
  1170.     for (y = 0; y < realheight; y++) {
  1171.         unsigned int tmp = (vport->y + y) * screen.scanline + vport->x * screen.pixelbytes;
  1172.         memcpy(pmap->data + srcrowsize * y, screen.fb_addr + tmp, realrowsize);
  1173.     }
  1174. }
  1175.  
  1176.  
  1177. /** Save viewport to pixmap
  1178.  *
  1179.  */
  1180. static int save_vp_to_pixmap(viewport_t *vport)
  1181. {
  1182.     int pm;
  1183.     pixmap_t *pmap;
  1184.    
  1185.     pm = find_free_pixmap();
  1186.     if (pm == -1)
  1187.         return ELIMIT;
  1188.    
  1189.     pmap = &pixmaps[pm];
  1190.     pmap->data = malloc(screen.pixelbytes * vport->width * vport->height);
  1191.     if (!pmap->data)
  1192.         return ENOMEM;
  1193.    
  1194.     pmap->width = vport->width;
  1195.     pmap->height = vport->height;
  1196.    
  1197.     copy_vp_to_pixmap(vport, pmap);
  1198.    
  1199.     return pm;
  1200. }
  1201.  
  1202.  
  1203. /** Draw pixmap on screen
  1204.  *
  1205.  * @param vp Viewport to draw on
  1206.  * @param pm Pixmap identifier
  1207.  *
  1208.  */
  1209. static int draw_pixmap(int vp, int pm)
  1210. {
  1211.     pixmap_t *pmap = &pixmaps[pm];
  1212.     viewport_t *vport = &viewports[vp];
  1213.    
  1214.     unsigned int width = vport->width;
  1215.     unsigned int height = vport->height;
  1216.    
  1217.     if (width + vport->x > screen.xres)
  1218.         width = screen.xres - vport->x;
  1219.     if (height + vport->y > screen.yres)
  1220.         height = screen.yres - vport->y;
  1221.    
  1222.     if (!pmap->data)
  1223.         return EINVAL;
  1224.    
  1225.     unsigned int realwidth = pmap->width <= width ? pmap->width : width;
  1226.     unsigned int realheight = pmap->height <= height ? pmap->height : height;
  1227.    
  1228.     unsigned int srcrowsize = vport->width * screen.pixelbytes;
  1229.     unsigned int realrowsize = realwidth * screen.pixelbytes;
  1230.    
  1231.     unsigned int y;
  1232.     for (y = 0; y < realheight; y++) {
  1233.         unsigned int tmp = (vport->y + y) * screen.scanline + vport->x * screen.pixelbytes;
  1234.         memcpy(screen.fb_addr + tmp, pmap->data + y * srcrowsize, realrowsize);
  1235.     }
  1236.    
  1237.     return EOK;
  1238. }
  1239.  
  1240.  
  1241. /** Tick animation one step forward
  1242.  *
  1243.  */
  1244. static void anims_tick(void)
  1245. {
  1246.     unsigned int i;
  1247.     static int counts = 0;
  1248.    
  1249.     /* Limit redrawing */
  1250.     counts = (counts + 1) % 8;
  1251.     if (counts)
  1252.         return;
  1253.    
  1254.     for (i = 0; i < MAX_ANIMATIONS; i++) {
  1255.         if ((!animations[i].animlen) || (!animations[i].initialized) ||
  1256.             (!animations[i].enabled))
  1257.             continue;
  1258.        
  1259.         draw_pixmap(animations[i].vp, animations[i].pixmaps[animations[i].pos]);
  1260.         animations[i].pos = (animations[i].pos + 1) % animations[i].animlen;
  1261.     }
  1262. }
  1263.  
  1264.  
  1265. static unsigned int pointer_x;
  1266. static unsigned int pointer_y;
  1267. static bool pointer_shown, pointer_enabled;
  1268. static int pointer_vport = -1;
  1269. static int pointer_pixmap = -1;
  1270.  
  1271.  
  1272. static void mouse_show(void)
  1273. {
  1274.     int i, j;
  1275.     int visibility;
  1276.     int color;
  1277.     int bytepos;
  1278.    
  1279.     if ((pointer_shown) || (!pointer_enabled))
  1280.         return;
  1281.    
  1282.     /* Save image under the pointer. */
  1283.     if (pointer_vport == -1) {
  1284.         pointer_vport = vport_create(pointer_x, pointer_y, pointer_width, pointer_height);
  1285.         if (pointer_vport < 0)
  1286.             return;
  1287.     } else {
  1288.         viewports[pointer_vport].x = pointer_x;
  1289.         viewports[pointer_vport].y = pointer_y;
  1290.     }
  1291.    
  1292.     if (pointer_pixmap == -1)
  1293.         pointer_pixmap = save_vp_to_pixmap(&viewports[pointer_vport]);
  1294.     else
  1295.         copy_vp_to_pixmap(&viewports[pointer_vport], &pixmaps[pointer_pixmap]);
  1296.    
  1297.     /* Draw mouse pointer. */
  1298.     for (i = 0; i < pointer_height; i++)
  1299.         for (j = 0; j < pointer_width; j++) {
  1300.             bytepos = i * ((pointer_width - 1) / 8 + 1) + j / 8;
  1301.             visibility = pointer_mask_bits[bytepos] &
  1302.                 (1 << (j % 8));
  1303.             if (visibility) {
  1304.                 color = pointer_bits[bytepos] &
  1305.                     (1 << (j % 8)) ? 0 : 0xffffff;
  1306.                 if (pointer_x + j < screen.xres && pointer_y +
  1307.                     i < screen.yres)
  1308.                     putpixel(&viewports[0], pointer_x + j,
  1309.                         pointer_y + i, color);
  1310.             }
  1311.         }
  1312.     pointer_shown = 1;
  1313. }
  1314.  
  1315.  
  1316. static void mouse_hide(void)
  1317. {
  1318.     /* Restore image under the pointer. */
  1319.     if (pointer_shown) {
  1320.         draw_pixmap(pointer_vport, pointer_pixmap);
  1321.         pointer_shown = 0;
  1322.     }
  1323. }
  1324.  
  1325.  
  1326. static void mouse_move(unsigned int x, unsigned int y)
  1327. {
  1328.     mouse_hide();
  1329.     pointer_x = x;
  1330.     pointer_y = y;
  1331.     mouse_show();
  1332. }
  1333.  
  1334.  
  1335. static int anim_handle(ipc_callid_t callid, ipc_call_t *call, int vp)
  1336. {
  1337.     bool handled = true;
  1338.     int retval = EOK;
  1339.     int i, nvp;
  1340.     int newval;
  1341.    
  1342.     switch (IPC_GET_METHOD(*call)) {
  1343.     case FB_ANIM_CREATE:
  1344.         nvp = IPC_GET_ARG1(*call);
  1345.         if (nvp == -1)
  1346.             nvp = vp;
  1347.         if (nvp >= MAX_VIEWPORTS || nvp < 0 ||
  1348.             !viewports[nvp].initialized) {
  1349.             retval = EINVAL;
  1350.             break;
  1351.         }
  1352.         for (i = 0; i < MAX_ANIMATIONS; i++) {
  1353.             if (!animations[i].initialized)
  1354.                 break;
  1355.         }
  1356.         if (i == MAX_ANIMATIONS) {
  1357.             retval = ELIMIT;
  1358.             break;
  1359.         }
  1360.         animations[i].initialized = 1;
  1361.         animations[i].animlen = 0;
  1362.         animations[i].pos = 0;
  1363.         animations[i].enabled = 0;
  1364.         animations[i].vp = nvp;
  1365.         retval = i;
  1366.         break;
  1367.     case FB_ANIM_DROP:
  1368.         i = IPC_GET_ARG1(*call);
  1369.         if (i >= MAX_ANIMATIONS || i < 0) {
  1370.             retval = EINVAL;
  1371.             break;
  1372.         }
  1373.         animations[i].initialized = 0;
  1374.         break;
  1375.     case FB_ANIM_ADDPIXMAP:
  1376.         i = IPC_GET_ARG1(*call);
  1377.         if (i >= MAX_ANIMATIONS || i < 0 ||
  1378.             !animations[i].initialized) {
  1379.             retval = EINVAL;
  1380.             break;
  1381.         }
  1382.         if (animations[i].animlen == MAX_ANIM_LEN) {
  1383.             retval = ELIMIT;
  1384.             break;
  1385.         }
  1386.         newval = IPC_GET_ARG2(*call);
  1387.         if (newval < 0 || newval > MAX_PIXMAPS ||
  1388.             !pixmaps[newval].data) {
  1389.             retval = EINVAL;
  1390.             break;
  1391.         }
  1392.         animations[i].pixmaps[animations[i].animlen++] = newval;
  1393.         break;
  1394.     case FB_ANIM_CHGVP:
  1395.         i = IPC_GET_ARG1(*call);
  1396.         if (i >= MAX_ANIMATIONS || i < 0) {
  1397.             retval = EINVAL;
  1398.             break;
  1399.         }
  1400.         nvp = IPC_GET_ARG2(*call);
  1401.         if (nvp == -1)
  1402.             nvp = vp;
  1403.         if (nvp >= MAX_VIEWPORTS || nvp < 0 ||
  1404.             !viewports[nvp].initialized) {
  1405.             retval = EINVAL;
  1406.             break;
  1407.         }
  1408.         animations[i].vp = nvp;
  1409.         break;
  1410.     case FB_ANIM_START:
  1411.     case FB_ANIM_STOP:
  1412.         i = IPC_GET_ARG1(*call);
  1413.         if (i >= MAX_ANIMATIONS || i < 0) {
  1414.             retval = EINVAL;
  1415.             break;
  1416.         }
  1417.         newval = (IPC_GET_METHOD(*call) == FB_ANIM_START);
  1418.         if (newval ^ animations[i].enabled) {
  1419.             animations[i].enabled = newval;
  1420.             anims_enabled += newval ? 1 : -1;
  1421.         }
  1422.         break;
  1423.     default:
  1424.         handled = 0;
  1425.     }
  1426.     if (handled)
  1427.         ipc_answer_0(callid, retval);
  1428.     return handled;
  1429. }
  1430.  
  1431.  
  1432. /** Handler for messages concerning pixmap handling
  1433.  *
  1434.  */
  1435. static int pixmap_handle(ipc_callid_t callid, ipc_call_t *call, int vp)
  1436. {
  1437.     bool handled = true;
  1438.     int retval = EOK;
  1439.     int i, nvp;
  1440.    
  1441.     switch (IPC_GET_METHOD(*call)) {
  1442.     case FB_VP_DRAW_PIXMAP:
  1443.         nvp = IPC_GET_ARG1(*call);
  1444.         if (nvp == -1)
  1445.             nvp = vp;
  1446.         if (nvp < 0 || nvp >= MAX_VIEWPORTS ||
  1447.             !viewports[nvp].initialized) {
  1448.             retval = EINVAL;
  1449.             break;
  1450.         }
  1451.         i = IPC_GET_ARG2(*call);
  1452.         retval = draw_pixmap(nvp, i);
  1453.         break;
  1454.     case FB_VP2PIXMAP:
  1455.         nvp = IPC_GET_ARG1(*call);
  1456.         if (nvp == -1)
  1457.             nvp = vp;
  1458.         if (nvp < 0 || nvp >= MAX_VIEWPORTS ||
  1459.             !viewports[nvp].initialized)
  1460.             retval = EINVAL;
  1461.         else
  1462.             retval = save_vp_to_pixmap(&viewports[nvp]);
  1463.         break;
  1464.     case FB_DROP_PIXMAP:
  1465.         i = IPC_GET_ARG1(*call);
  1466.         if (i >= MAX_PIXMAPS) {
  1467.             retval = EINVAL;
  1468.             break;
  1469.         }
  1470.         if (pixmaps[i].data) {
  1471.             free(pixmaps[i].data);
  1472.             pixmaps[i].data = NULL;
  1473.         }
  1474.         break;
  1475.     default:
  1476.         handled = 0;
  1477.     }
  1478.    
  1479.     if (handled)
  1480.         ipc_answer_0(callid, retval);
  1481.     return handled;
  1482.    
  1483. }
  1484.  
  1485. static int rgb_from_style(attr_rgb_t *rgb, int style)
  1486. {
  1487.     switch (style) {
  1488.     case STYLE_NORMAL:
  1489.         rgb->fg_color = color_table[COLOR_BLACK];
  1490.         rgb->bg_color = color_table[COLOR_WHITE];
  1491.         break;
  1492.     case STYLE_EMPHASIS:
  1493.         rgb->fg_color = color_table[COLOR_RED];
  1494.         rgb->bg_color = color_table[COLOR_WHITE];
  1495.         break;
  1496.     default:
  1497.         return EINVAL;
  1498.     }
  1499.  
  1500.     return EOK;
  1501. }
  1502.  
  1503. static int rgb_from_idx(attr_rgb_t *rgb, ipcarg_t fg_color,
  1504.     ipcarg_t bg_color, ipcarg_t flags)
  1505. {
  1506.     fg_color = (fg_color & 7) | ((flags & CATTR_BRIGHT) ? 8 : 0);
  1507.     bg_color = (bg_color & 7) | ((flags & CATTR_BRIGHT) ? 8 : 0);
  1508.  
  1509.     rgb->fg_color = color_table[fg_color];
  1510.     rgb->bg_color = color_table[bg_color];
  1511.  
  1512.     return EOK;
  1513. }
  1514.  
  1515. static int rgb_from_attr(attr_rgb_t *rgb, const attrs_t *a)
  1516. {
  1517.     int rc;
  1518.  
  1519.     switch (a->t) {
  1520.     case at_style:
  1521.         rc = rgb_from_style(rgb, a->a.s.style);
  1522.         break;
  1523.     case at_idx:
  1524.         rc = rgb_from_idx(rgb, a->a.i.fg_color,
  1525.             a->a.i.bg_color, a->a.i.flags);
  1526.         break;
  1527.     case at_rgb:
  1528.         *rgb = a->a.r;
  1529.         rc = EOK;
  1530.         break;
  1531.     }
  1532.  
  1533.     return rc;
  1534. }
  1535.  
  1536. static int fb_set_style(viewport_t *vport, ipcarg_t style)
  1537. {
  1538.     return rgb_from_style(&vport->attr, (int) style);
  1539. }
  1540.  
  1541. static int fb_set_color(viewport_t *vport, ipcarg_t fg_color,
  1542.     ipcarg_t bg_color, ipcarg_t flags)
  1543. {
  1544.     return rgb_from_idx(&vport->attr, fg_color, bg_color, flags);
  1545. }
  1546.  
  1547. /** Function for handling connections to FB
  1548.  *
  1549.  */
  1550. static void fb_client_connection(ipc_callid_t iid, ipc_call_t *icall)
  1551. {
  1552.     unsigned int vp = 0;
  1553.     viewport_t *vport = &viewports[vp];
  1554.    
  1555.     if (client_connected) {
  1556.         ipc_answer_0(iid, ELIMIT);
  1557.         return;
  1558.     }
  1559.    
  1560.     /* Accept connection */
  1561.     client_connected = true;
  1562.     ipc_answer_0(iid, EOK);
  1563.    
  1564.     while (true) {
  1565.         ipc_callid_t callid;
  1566.         ipc_call_t call;
  1567.         int retval;
  1568.         unsigned int i;
  1569.         int scroll;
  1570.         wchar_t ch;
  1571.         unsigned int col, row;
  1572.        
  1573.         if ((vport->cursor_active) || (anims_enabled))
  1574.             callid = async_get_call_timeout(&call, 250000);
  1575.         else
  1576.             callid = async_get_call(&call);
  1577.        
  1578.         mouse_hide();
  1579.         if (!callid) {
  1580.             cursor_blink(vport);
  1581.             anims_tick();
  1582.             mouse_show();
  1583.             continue;
  1584.         }
  1585.        
  1586.         if (shm_handle(callid, &call, vp))
  1587.             continue;
  1588.        
  1589.         if (pixmap_handle(callid, &call, vp))
  1590.             continue;
  1591.        
  1592.         if (anim_handle(callid, &call, vp))
  1593.             continue;
  1594.        
  1595.         switch (IPC_GET_METHOD(call)) {
  1596.         case IPC_M_PHONE_HUNGUP:
  1597.             client_connected = false;
  1598.            
  1599.             /* Cleanup other viewports */
  1600.             for (i = 1; i < MAX_VIEWPORTS; i++)
  1601.                 vport->initialized = false;
  1602.            
  1603.             /* Exit thread */
  1604.             return;
  1605.        
  1606.         case FB_PUTCHAR:
  1607.             ch = IPC_GET_ARG1(call);
  1608.             col = IPC_GET_ARG2(call);
  1609.             row = IPC_GET_ARG3(call);
  1610.            
  1611.             if ((col >= vport->cols) || (row >= vport->rows)) {
  1612.                 retval = EINVAL;
  1613.                 break;
  1614.             }
  1615.             ipc_answer_0(callid, EOK);
  1616.            
  1617.             draw_char(vport, ch, col, row);
  1618.            
  1619.             /* Message already answered */
  1620.             continue;
  1621.         case FB_CLEAR:
  1622.             vport_clear(vport);
  1623.             cursor_show(vport);
  1624.             retval = EOK;
  1625.             break;
  1626.         case FB_CURSOR_GOTO:
  1627.             col = IPC_GET_ARG1(call);
  1628.             row = IPC_GET_ARG2(call);
  1629.            
  1630.             if ((col >= vport->cols) || (row >= vport->rows)) {
  1631.                 retval = EINVAL;
  1632.                 break;
  1633.             }
  1634.             retval = EOK;
  1635.            
  1636.             cursor_hide(vport);
  1637.             vport->cur_col = col;
  1638.             vport->cur_row = row;
  1639.             cursor_show(vport);
  1640.             break;
  1641.         case FB_CURSOR_VISIBILITY:
  1642.             cursor_hide(vport);
  1643.             vport->cursor_active = IPC_GET_ARG1(call);
  1644.             cursor_show(vport);
  1645.             retval = EOK;
  1646.             break;
  1647.         case FB_GET_CSIZE:
  1648.             ipc_answer_2(callid, EOK, vport->cols, vport->rows);
  1649.             continue;
  1650.         case FB_GET_COLOR_CAP:
  1651.             ipc_answer_1(callid, EOK, FB_CCAP_RGB);
  1652.             continue;
  1653.         case FB_SCROLL:
  1654.             scroll = IPC_GET_ARG1(call);
  1655.             if ((scroll > (int) vport->rows) || (scroll < (-(int) vport->rows))) {
  1656.                 retval = EINVAL;
  1657.                 break;
  1658.             }
  1659.             cursor_hide(vport);
  1660.             vport_scroll(vport, scroll);
  1661.             cursor_show(vport);
  1662.             retval = EOK;
  1663.             break;
  1664.         case FB_VIEWPORT_SWITCH:
  1665.             i = IPC_GET_ARG1(call);
  1666.             if (i >= MAX_VIEWPORTS) {
  1667.                 retval = EINVAL;
  1668.                 break;
  1669.             }
  1670.             if (!viewports[i].initialized) {
  1671.                 retval = EADDRNOTAVAIL;
  1672.                 break;
  1673.             }
  1674.             cursor_hide(vport);
  1675.             vp = i;
  1676.             vport = &viewports[vp];
  1677.             cursor_show(vport);
  1678.             retval = EOK;
  1679.             break;
  1680.         case FB_VIEWPORT_CREATE:
  1681.             retval = vport_create(IPC_GET_ARG1(call) >> 16,
  1682.                 IPC_GET_ARG1(call) & 0xffff,
  1683.                 IPC_GET_ARG2(call) >> 16,
  1684.                 IPC_GET_ARG2(call) & 0xffff);
  1685.             break;
  1686.         case FB_VIEWPORT_DELETE:
  1687.             i = IPC_GET_ARG1(call);
  1688.             if (i >= MAX_VIEWPORTS) {
  1689.                 retval = EINVAL;
  1690.                 break;
  1691.             }
  1692.             if (!viewports[i].initialized) {
  1693.                 retval = EADDRNOTAVAIL;
  1694.                 break;
  1695.             }
  1696.             viewports[i].initialized = false;
  1697.             if (viewports[i].bgpixel)
  1698.                 free(viewports[i].bgpixel);
  1699.             if (viewports[i].backbuf)
  1700.                 free(viewports[i].backbuf);
  1701.             retval = EOK;
  1702.             break;
  1703.         case FB_SET_STYLE:
  1704.             retval = fb_set_style(vport, IPC_GET_ARG1(call));
  1705.             break;
  1706.         case FB_SET_COLOR:
  1707.             retval = fb_set_color(vport, IPC_GET_ARG1(call),
  1708.                 IPC_GET_ARG2(call), IPC_GET_ARG3(call));
  1709.             break;
  1710.         case FB_SET_RGB_COLOR:
  1711.             vport->attr.fg_color = IPC_GET_ARG1(call);
  1712.             vport->attr.bg_color = IPC_GET_ARG2(call);
  1713.             retval = EOK;
  1714.             break;
  1715.         case FB_GET_RESOLUTION:
  1716.             ipc_answer_2(callid, EOK, screen.xres, screen.yres);
  1717.             continue;
  1718.         case FB_POINTER_MOVE:
  1719.             pointer_enabled = true;
  1720.             mouse_move(IPC_GET_ARG1(call), IPC_GET_ARG2(call));
  1721.             retval = EOK;
  1722.             break;
  1723.         case FB_SCREEN_YIELD:
  1724.         case FB_SCREEN_RECLAIM:
  1725.             retval = EOK;
  1726.             break;
  1727.         default:
  1728.             retval = ENOENT;
  1729.         }
  1730.         ipc_answer_0(callid, retval);
  1731.     }
  1732. }
  1733.  
  1734. /** Initialization of framebuffer
  1735.  *
  1736.  */
  1737. int fb_init(void)
  1738. {
  1739.     async_set_client_connection(fb_client_connection);
  1740.    
  1741.     void *fb_ph_addr = (void *) sysinfo_value("fb.address.physical");
  1742.     unsigned int fb_offset = sysinfo_value("fb.offset");
  1743.     unsigned int fb_width = sysinfo_value("fb.width");
  1744.     unsigned int fb_height = sysinfo_value("fb.height");
  1745.     unsigned int fb_scanline = sysinfo_value("fb.scanline");
  1746.     unsigned int fb_visual = sysinfo_value("fb.visual");
  1747.    
  1748.     unsigned int fbsize = fb_scanline * fb_height;
  1749.     void *fb_addr = as_get_mappable_page(fbsize);
  1750.    
  1751.     if (physmem_map(fb_ph_addr + fb_offset, fb_addr,
  1752.         ALIGN_UP(fbsize, PAGE_SIZE) >> PAGE_WIDTH, AS_AREA_READ | AS_AREA_WRITE) != 0)
  1753.         return -1;
  1754.    
  1755.     if (screen_init(fb_addr, fb_width, fb_height, fb_scanline, fb_visual))
  1756.         return 0;
  1757.    
  1758.     return -1;
  1759. }
  1760.  
  1761. /**
  1762.  * @}
  1763.  */
  1764.