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