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