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