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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_attr(attr_rgb_t *rgb, const attrs_t *a);
  189. static int rgb_from_style(attr_rgb_t *rgb, int style);
  190. static int rgb_from_idx(attr_rgb_t *rgb, ipcarg_t fg_color,
  191.     ipcarg_t bg_color, ipcarg_t flags);
  192.  
  193. static int fb_set_color(viewport_t *vport, ipcarg_t fg_color,
  194.     ipcarg_t bg_color, ipcarg_t attr);
  195.  
  196. static void draw_glyph_aligned(unsigned int x, unsigned int y, bool cursor,
  197.     uint8_t *glyphs, uint8_t glyph, uint32_t fg_color, uint32_t bg_color);
  198. static void draw_glyph_fallback(unsigned int x, unsigned int y, bool cursor,
  199.     uint8_t *glyphs, uint8_t glyph, uint32_t fg_color, uint32_t bg_color);
  200.  
  201. static void draw_vp_glyph(viewport_t *vport, bool cursor, unsigned int col,
  202.     unsigned int row);
  203.  
  204.  
  205. #define RED(x, bits)                 ((x >> (8 + 8 + 8 - bits)) & ((1 << bits) - 1))
  206. #define GREEN(x, bits)               ((x >> (8 + 8 - bits)) & ((1 << bits) - 1))
  207. #define BLUE(x, bits)                ((x >> (8 - bits)) & ((1 << bits) - 1))
  208.  
  209. #define COL2X(col)                   ((col) * FONT_WIDTH)
  210. #define ROW2Y(row)                   ((row) * FONT_SCANLINES)
  211.  
  212. #define X2COL(x)                     ((x) / FONT_WIDTH)
  213. #define Y2ROW(y)                     ((y) / FONT_SCANLINES)
  214.  
  215. #define FB_POS(x, y)                 ((y) * screen.scanline + (x) * screen.pixelbytes)
  216. #define BB_POS(vport, col, row)      ((row) * vport->cols + (col))
  217. #define GLYPH_POS(glyph, y, cursor)  (((glyph) + (cursor) * FONT_GLYPHS) * screen.glyphbytes + (y) * screen.glyphscanline)
  218.  
  219.  
  220. /** ARGB 8:8:8:8 conversion
  221.  *
  222.  */
  223. static void rgb_0888(void *dst, uint32_t rgb)
  224. {
  225.     *((uint32_t *) dst) = rgb & 0xffffff;
  226. }
  227.  
  228.  
  229. /** ABGR 8:8:8:8 conversion
  230.  *
  231.  */
  232. static void bgr_0888(void *dst, uint32_t rgb)
  233. {
  234.     *((uint32_t *) dst)
  235.         = (BLUE(rgb, 8) << 16) | (GREEN(rgb, 8) << 8) | RED(rgb, 8);
  236. }
  237.  
  238.  
  239. /** RGB 8:8:8 conversion
  240.  *
  241.  */
  242. static void rgb_888(void *dst, uint32_t rgb)
  243. {
  244.     ((uint8_t *) dst)[0] = BLUE(rgb, 8);
  245.     ((uint8_t *) dst)[1] = GREEN(rgb, 8);
  246.     ((uint8_t *) dst)[2] = RED(rgb, 8);
  247. }
  248.  
  249.  
  250. /** BGR 8:8:8 conversion
  251.  *
  252.  */
  253. static void bgr_888(void *dst, uint32_t rgb)
  254. {
  255.     ((uint8_t *) dst)[0] = RED(rgb, 8);
  256.     ((uint8_t *) dst)[1] = GREEN(rgb, 8);
  257.     ((uint8_t *) dst)[2] = BLUE(rgb, 8);
  258. }
  259.  
  260.  
  261. /** RGB 5:5:5 conversion
  262.  *
  263.  */
  264. static void rgb_555(void *dst, uint32_t rgb)
  265. {
  266.     *((uint16_t *) dst)
  267.         = (RED(rgb, 5) << 10) | (GREEN(rgb, 5) << 5) | BLUE(rgb, 5);
  268. }
  269.  
  270.  
  271. /** RGB 5:6:5 conversion
  272.  *
  273.  */
  274. static void rgb_565(void *dst, uint32_t rgb)
  275. {
  276.     *((uint16_t *) dst)
  277.         = (RED(rgb, 5) << 11) | (GREEN(rgb, 6) << 5) | BLUE(rgb, 5);
  278. }
  279.  
  280.  
  281. /** RGB 3:2:3
  282.  *
  283.  */
  284. static void rgb_323(void *dst, uint32_t rgb)
  285. {
  286.     *((uint8_t *) dst)
  287.         = ~((RED(rgb, 3) << 5) | (GREEN(rgb, 2) << 3) | BLUE(rgb, 3));
  288. }
  289.  
  290. /** Draw a filled rectangle.
  291.  *
  292.  * @note Need real implementation that does not access VRAM twice.
  293.  */
  294. static void draw_filled_rect(unsigned int x0, unsigned int y0, unsigned int x1,
  295.     unsigned int y1, uint32_t color)
  296. {
  297.     unsigned int x, y;
  298.     unsigned int copy_bytes;
  299.  
  300.     uint8_t *sp, *dp;
  301.     uint8_t cbuf[4];
  302.  
  303.     if (y0 >= y1 || x0 >= x1) return;
  304.     screen.rgb_conv(cbuf, color);
  305.  
  306.     sp = &screen.fb_addr[FB_POS(x0, y0)];
  307.     dp = sp;
  308.  
  309.     /* Draw the first line. */
  310.     for (x = x0; x < x1; x++) {
  311.         memcpy(dp, cbuf, screen.pixelbytes);
  312.         dp += screen.pixelbytes;
  313.     }
  314.  
  315.     dp = sp + screen.scanline;
  316.     copy_bytes = (x1 - x0) * screen.pixelbytes;
  317.  
  318.     /* Draw the remaining lines by copying. */
  319.     for (y = y0 + 1; y < y1; y++) {
  320.         memcpy(dp, sp, copy_bytes);
  321.         dp += screen.scanline;
  322.     }
  323. }
  324.  
  325. /** Redraw viewport.
  326.  *
  327.  * @param vport Viewport to redraw
  328.  *
  329.  */
  330. static void vport_redraw(viewport_t *vport)
  331. {
  332.     unsigned int row, col;
  333.  
  334.     for (row = 0; row < vport->rows; row++) {
  335.         for (col = 0; col < vport->cols; col++) {
  336.             draw_vp_glyph(vport, false, col, row);
  337.         }
  338.     }
  339.  
  340.     if (COL2X(vport->cols) < vport->width) {
  341.         draw_filled_rect(
  342.             vport->x + COL2X(vport->cols), vport->y,
  343.             vport->x + vport->width, vport->y + vport->height,
  344.             vport->attr.bg_color);
  345.     }
  346.  
  347.     if (ROW2Y(vport->rows) < vport->height) {
  348.         draw_filled_rect(
  349.             vport->x, vport->y + ROW2Y(vport->rows),
  350.             vport->x + vport->width, vport->y + vport->height,
  351.             vport->attr.bg_color);
  352.     }
  353. }
  354.  
  355. static void backbuf_clear(bb_cell_t *backbuf, size_t len, uint32_t fg_color,
  356.     uint32_t bg_color)
  357. {
  358.     unsigned i;
  359.  
  360.     for (i = 0; i < len; i++) {
  361.         backbuf[i].glyph = 0;
  362.         backbuf[i].fg_color = fg_color;
  363.         backbuf[i].bg_color = bg_color;
  364.     }
  365. }
  366.  
  367. /** Clear viewport.
  368.  *
  369.  * @param vport Viewport to clear
  370.  *
  371.  */
  372. static void vport_clear(viewport_t *vport)
  373. {
  374.     backbuf_clear(vport->backbuf, vport->cols * vport->rows,
  375.         vport->attr.fg_color, vport->attr.bg_color);
  376.     vport_redraw(vport);
  377. }
  378.  
  379. /** Scroll viewport by the specified number of lines.
  380.  *
  381.  * @param vport Viewport to scroll
  382.  * @param lines Number of lines to scroll
  383.  *
  384.  */
  385. static void vport_scroll(viewport_t *vport, int lines)
  386. {
  387.     unsigned int row, col;
  388.     unsigned int x, y;
  389.     uint8_t glyph;
  390.     uint32_t fg_color;
  391.     uint32_t bg_color;
  392.     bb_cell_t *bbp, *xbp;
  393.  
  394.     /*
  395.      * Redraw.
  396.      */
  397.  
  398.     y = vport->y;
  399.     for (row = 0; row < vport->rows; row++) {
  400.         x = vport->x;
  401.         for (col = 0; col < vport->cols; col++) {
  402.             if ((row + lines >= 0) && (row + lines < vport->rows)) {
  403.                 xbp = &vport->backbuf[BB_POS(vport, col, row + lines)];
  404.                 bbp = &vport->backbuf[BB_POS(vport, col, row)];
  405.  
  406.                 glyph = xbp->glyph;
  407.                 fg_color = xbp->fg_color;
  408.                 bg_color = xbp->bg_color;
  409.  
  410.                 if (bbp->glyph == glyph &&
  411.                     bbp->fg_color == xbp->fg_color &&
  412.                     bbp->bg_color == xbp->bg_color) {
  413.                     x += FONT_WIDTH;
  414.                     continue;
  415.                 }
  416.             } else {
  417.                 glyph = 0;
  418.                 fg_color = vport->attr.fg_color;
  419.                 bg_color = vport->attr.bg_color;
  420.             }
  421.  
  422.             (*vport->dglyph)(x, y, false, vport->glyphs, glyph,
  423.                 fg_color, bg_color);
  424.             x += FONT_WIDTH;
  425.         }
  426.         y += FONT_SCANLINES;
  427.     }
  428.  
  429.     /*
  430.      * Scroll backbuffer.
  431.      */
  432.  
  433.     if (lines > 0) {
  434.         memmove(vport->backbuf, vport->backbuf + vport->cols * lines,
  435.             vport->cols * (vport->rows - lines) * sizeof(bb_cell_t));
  436.         backbuf_clear(&vport->backbuf[BB_POS(vport, 0, vport->rows - lines)],
  437.             vport->cols * lines, vport->attr.fg_color, vport->attr.bg_color);
  438.     } else {
  439.         memmove(vport->backbuf - vport->cols * lines, vport->backbuf,
  440.             vport->cols * (vport->rows + lines) * sizeof(bb_cell_t));
  441.         backbuf_clear(vport->backbuf, - vport->cols * lines,
  442.             vport->attr.fg_color, vport->attr.bg_color);
  443.     }
  444. }
  445.  
  446. /** Render glyphs
  447.  *
  448.  * Convert glyphs from device independent font
  449.  * description to current visual representation.
  450.  *
  451.  * @param vport Viewport
  452.  *
  453.  */
  454. static void render_glyphs(viewport_t* vport)
  455. {
  456.     unsigned int glyph;
  457.    
  458.     for (glyph = 0; glyph < FONT_GLYPHS; glyph++) {
  459.         unsigned int y;
  460.        
  461.         for (y = 0; y < FONT_SCANLINES; y++) {
  462.             unsigned int x;
  463.            
  464.             for (x = 0; x < FONT_WIDTH; x++) {
  465.                 screen.rgb_conv(&vport->glyphs[GLYPH_POS(glyph, y, false) + x * screen.pixelbytes],
  466.                     (fb_font[glyph * FONT_SCANLINES + y] & (1 << (7 - x)))
  467.                     ? 0xffffff : 0x000000);
  468.                
  469.                 screen.rgb_conv(&vport->glyphs[GLYPH_POS(glyph, y, true) + x * screen.pixelbytes],
  470.                     (fb_font[glyph * FONT_SCANLINES + y] & (1 << (7 - x)))
  471.                     ? 0x000000 : 0xffffff);
  472.             }
  473.         }
  474.     }
  475.    
  476.     screen.rgb_conv(vport->bgpixel, vport->attr.bg_color);
  477. }
  478.  
  479.  
  480. /** Create new viewport
  481.  *
  482.  * @param x      Origin of the viewport (x).
  483.  * @param y      Origin of the viewport (y).
  484.  * @param width  Width of the viewport.
  485.  * @param height Height of the viewport.
  486.  *
  487.  * @return New viewport number.
  488.  *
  489.  */
  490. static int vport_create(unsigned int x, unsigned int y,
  491.     unsigned int width, unsigned int height)
  492. {
  493.     unsigned int i;
  494.    
  495.     for (i = 0; i < MAX_VIEWPORTS; i++) {
  496.         if (!viewports[i].initialized)
  497.             break;
  498.     }
  499.     if (i == MAX_VIEWPORTS)
  500.         return ELIMIT;
  501.    
  502.     unsigned int cols = width / FONT_WIDTH;
  503.     unsigned int rows = height / FONT_SCANLINES;
  504.     unsigned int bbsize = cols * rows * sizeof(bb_cell_t);
  505.     unsigned int glyphsize = 2 * FONT_GLYPHS * screen.glyphbytes;
  506.     unsigned int word_size = sizeof(unsigned long);
  507.    
  508.     bb_cell_t *backbuf = (bb_cell_t *) malloc(bbsize);
  509.     if (!backbuf)
  510.         return ENOMEM;
  511.    
  512.     uint8_t *glyphs = (uint8_t *) malloc(glyphsize);
  513.     if (!glyphs) {
  514.         free(backbuf);
  515.         return ENOMEM;
  516.     }
  517.    
  518.     uint8_t *bgpixel = (uint8_t *) malloc(screen.pixelbytes);
  519.     if (!bgpixel) {
  520.         free(glyphs);
  521.         free(backbuf);
  522.         return ENOMEM;
  523.     }
  524.  
  525.     backbuf_clear(backbuf, cols * rows, DEFAULT_FGCOLOR, DEFAULT_BGCOLOR);
  526.     memset(glyphs, 0, glyphsize);
  527.     memset(bgpixel, 0, screen.pixelbytes);
  528.    
  529.     viewports[i].x = x;
  530.     viewports[i].y = y;
  531.     viewports[i].width = width;
  532.     viewports[i].height = height;
  533.    
  534.     viewports[i].cols = cols;
  535.     viewports[i].rows = rows;
  536.    
  537.     viewports[i].attr.bg_color = DEFAULT_BGCOLOR;
  538.     viewports[i].attr.fg_color = DEFAULT_FGCOLOR;
  539.    
  540.     viewports[i].glyphs = glyphs;
  541.     viewports[i].bgpixel = bgpixel;
  542.  
  543.     /*
  544.      * Conditions necessary  to select aligned version:
  545.      *
  546.      *   - word size is divisible by pixelbytes
  547.      *   - cell scanline size is divisible by word size
  548.      *   - cell scanlines are word-aligned
  549.      */
  550.     if ((word_size % screen.pixelbytes) == 0 &&
  551.         (FONT_WIDTH * screen.pixelbytes) % word_size == 0 &&
  552.         (x * screen.pixelbytes) % word_size == 0 &&
  553.         screen.scanline % word_size == 0) {
  554.  
  555.         viewports[i].dglyph = draw_glyph_aligned;
  556.     } else {
  557.         viewports[i].dglyph = draw_glyph_fallback;
  558.     }
  559.  
  560.     viewports[i].cur_col = 0;
  561.     viewports[i].cur_row = 0;
  562.     viewports[i].cursor_active = false;
  563.     viewports[i].cursor_shown = false;
  564.    
  565.     viewports[i].bbsize = bbsize;
  566.     viewports[i].backbuf = backbuf;
  567.    
  568.     viewports[i].initialized = true;
  569.    
  570.     render_glyphs(&viewports[i]);
  571.    
  572.     return i;
  573. }
  574.  
  575.  
  576. /** Initialize framebuffer as a chardev output device
  577.  *
  578.  * @param addr   Address of the framebuffer
  579.  * @param xres   Screen width in pixels
  580.  * @param yres   Screen height in pixels
  581.  * @param visual Bits per pixel (8, 16, 24, 32)
  582.  * @param scan   Bytes per one scanline
  583.  *
  584.  */
  585. static bool screen_init(void *addr, unsigned int xres, unsigned int yres,
  586.     unsigned int scan, unsigned int visual)
  587. {
  588.     switch (visual) {
  589.     case VISUAL_INDIRECT_8:
  590.         screen.rgb_conv = rgb_323;
  591.         screen.pixelbytes = 1;
  592.         break;
  593.     case VISUAL_RGB_5_5_5:
  594.         screen.rgb_conv = rgb_555;
  595.         screen.pixelbytes = 2;
  596.         break;
  597.     case VISUAL_RGB_5_6_5:
  598.         screen.rgb_conv = rgb_565;
  599.         screen.pixelbytes = 2;
  600.         break;
  601.     case VISUAL_RGB_8_8_8:
  602.         screen.rgb_conv = rgb_888;
  603.         screen.pixelbytes = 3;
  604.         break;
  605.     case VISUAL_BGR_8_8_8:
  606.         screen.rgb_conv = bgr_888;
  607.         screen.pixelbytes = 3;
  608.         break;
  609.     case VISUAL_RGB_8_8_8_0:
  610.         screen.rgb_conv = rgb_888;
  611.         screen.pixelbytes = 4;
  612.         break;
  613.     case VISUAL_RGB_0_8_8_8:
  614.         screen.rgb_conv = rgb_0888;
  615.         screen.pixelbytes = 4;
  616.         break;
  617.     case VISUAL_BGR_0_8_8_8:
  618.         screen.rgb_conv = bgr_0888;
  619.         screen.pixelbytes = 4;
  620.         break;
  621.     default:
  622.         return false;
  623.     }
  624.  
  625.     screen.fb_addr = (unsigned char *) addr;
  626.     screen.xres = xres;
  627.     screen.yres = yres;
  628.     screen.scanline = scan;
  629.    
  630.     screen.glyphscanline = FONT_WIDTH * screen.pixelbytes;
  631.     screen.glyphbytes = screen.glyphscanline * FONT_SCANLINES;
  632.    
  633.     /* Create first viewport */
  634.     vport_create(0, 0, xres, yres);
  635.    
  636.     return true;
  637. }
  638.  
  639.  
  640. /** Draw a glyph, takes advantage of alignment.
  641.  *
  642.  * This version can only be used if the following conditions are met:
  643.  *
  644.  *   - word size is divisible by pixelbytes
  645.  *   - cell scanline size is divisible by word size
  646.  *   - cell scanlines are word-aligned
  647.  *
  648.  * It makes use of the pre-rendered mask to process (possibly) several
  649.  * pixels at once (word size / pixelbytes pixels at a time are processed)
  650.  * making it very fast. Most notably this version is not applicable at 24 bits
  651.  * per pixel.
  652.  *
  653.  * @param x     x coordinate of top-left corner on screen.
  654.  * @param y     y coordinate of top-left corner on screen.
  655.  * @param cursor    Draw glyph with cursor
  656.  * @param glyphs    Pointer to font bitmap.
  657.  * @param glyph     Code of the glyph to draw.
  658.  * @param fg_color  Foreground color.
  659.  * @param bg_color  Backgroudn color.
  660.  */
  661. static void draw_glyph_aligned(unsigned int x, unsigned int y, bool cursor,
  662.     uint8_t *glyphs, uint8_t glyph, uint32_t fg_color, uint32_t bg_color)
  663. {
  664.     unsigned int i, yd;
  665.     unsigned long fg_buf, bg_buf;
  666.     unsigned long *maskp, *dp;
  667.     unsigned long mask;
  668.     unsigned int ww, d_add;
  669.  
  670.     /*
  671.      * Prepare a pair of words, one filled with foreground-color
  672.      * pattern and the other filled with background-color pattern.
  673.      */
  674.     for (i = 0; i < sizeof(unsigned long) / screen.pixelbytes; i++) {
  675.         screen.rgb_conv(&((uint8_t *)&fg_buf)[i * screen.pixelbytes],
  676.             fg_color);
  677.         screen.rgb_conv(&((uint8_t *)&bg_buf)[i * screen.pixelbytes],
  678.             bg_color);
  679.     }
  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, uint8_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 * FONT_SCANLINES + 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.     uint8_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, vport->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, uint8_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 = 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.             uint8_t glyph = bbp->glyph;
  893.  
  894.             a = &data[j * w + i].attrs;
  895.             rgb_from_attr(&rgb, a);
  896.  
  897.             bbp->glyph = data[j * w + i].character;
  898.             bbp->fg_color = rgb.fg_color;
  899.             bbp->bg_color = rgb.bg_color;
  900.  
  901.             draw_vp_glyph(vport, false, col, row);
  902.         }
  903.     }
  904.     cursor_show(vport);
  905. }
  906.  
  907.  
  908. static void putpixel_pixmap(void *data, unsigned int x, unsigned int y, uint32_t color)
  909. {
  910.     int pm = *((int *) data);
  911.     pixmap_t *pmap = &pixmaps[pm];
  912.     unsigned int pos = (y * pmap->width + x) * screen.pixelbytes;
  913.    
  914.     screen.rgb_conv(&pmap->data[pos], color);
  915. }
  916.  
  917.  
  918. static void putpixel(void *data, unsigned int x, unsigned int y, uint32_t color)
  919. {
  920.     viewport_t *vport = (viewport_t *) data;
  921.     unsigned int dx = vport->x + x;
  922.     unsigned int dy = vport->y + y;
  923.    
  924.     screen.rgb_conv(&screen.fb_addr[FB_POS(dx, dy)], color);
  925. }
  926.  
  927.  
  928. /** Return first free pixmap
  929.  *
  930.  */
  931. static int find_free_pixmap(void)
  932. {
  933.     unsigned int i;
  934.    
  935.     for (i = 0; i < MAX_PIXMAPS; i++)
  936.         if (!pixmaps[i].data)
  937.             return i;
  938.    
  939.     return -1;
  940. }
  941.  
  942.  
  943. /** Create a new pixmap and return appropriate ID
  944.  *
  945.  */
  946. static int shm2pixmap(unsigned char *shm, size_t size)
  947. {
  948.     int pm;
  949.     pixmap_t *pmap;
  950.    
  951.     pm = find_free_pixmap();
  952.     if (pm == -1)
  953.         return ELIMIT;
  954.    
  955.     pmap = &pixmaps[pm];
  956.    
  957.     if (ppm_get_data(shm, size, &pmap->width, &pmap->height))
  958.         return EINVAL;
  959.    
  960.     pmap->data = malloc(pmap->width * pmap->height * screen.pixelbytes);
  961.     if (!pmap->data)
  962.         return ENOMEM;
  963.    
  964.     ppm_draw(shm, size, 0, 0, pmap->width, pmap->height, putpixel_pixmap, (void *) &pm);
  965.    
  966.     return pm;
  967. }
  968.  
  969.  
  970. /** Handle shared memory communication calls
  971.  *
  972.  * Protocol for drawing pixmaps:
  973.  * - FB_PREPARE_SHM(client shm identification)
  974.  * - IPC_M_AS_AREA_SEND
  975.  * - FB_DRAW_PPM(startx, starty)
  976.  * - FB_DROP_SHM
  977.  *
  978.  * Protocol for text drawing
  979.  * - IPC_M_AS_AREA_SEND
  980.  * - FB_DRAW_TEXT_DATA
  981.  *
  982.  * @param callid Callid of the current call
  983.  * @param call   Current call data
  984.  * @param vp     Active viewport
  985.  *
  986.  * @return false if the call was not handled byt this function, true otherwise
  987.  *
  988.  * Note: this function is not threads safe, you would have
  989.  * to redefine static variables with __thread
  990.  *
  991.  */
  992. static bool shm_handle(ipc_callid_t callid, ipc_call_t *call, int vp)
  993. {
  994.     static keyfield_t *interbuffer = NULL;
  995.     static size_t intersize = 0;
  996.    
  997.     static unsigned char *shm = NULL;
  998.     static ipcarg_t shm_id = 0;
  999.     static size_t shm_size;
  1000.    
  1001.     bool handled = true;
  1002.     int retval = EOK;
  1003.     viewport_t *vport = &viewports[vp];
  1004.     unsigned int x;
  1005.     unsigned int y;
  1006.     unsigned int w;
  1007.     unsigned int h;
  1008.    
  1009.     switch (IPC_GET_METHOD(*call)) {
  1010.     case IPC_M_SHARE_OUT:
  1011.         /* We accept one area for data interchange */
  1012.         if (IPC_GET_ARG1(*call) == shm_id) {
  1013.             void *dest = as_get_mappable_page(IPC_GET_ARG2(*call));
  1014.             shm_size = IPC_GET_ARG2(*call);
  1015.             if (!ipc_answer_1(callid, EOK, (sysarg_t) dest))
  1016.                 shm = dest;
  1017.             else
  1018.                 shm_id = 0;
  1019.            
  1020.             if (shm[0] != 'P')
  1021.                 return false;
  1022.            
  1023.             return true;
  1024.         } else {
  1025.             intersize = IPC_GET_ARG2(*call);
  1026.             receive_comm_area(callid, call, (void *) &interbuffer);
  1027.         }
  1028.         return true;
  1029.     case FB_PREPARE_SHM:
  1030.         if (shm_id)
  1031.             retval = EBUSY;
  1032.         else
  1033.             shm_id = IPC_GET_ARG1(*call);
  1034.         break;
  1035.        
  1036.     case FB_DROP_SHM:
  1037.         if (shm) {
  1038.             as_area_destroy(shm);
  1039.             shm = NULL;
  1040.         }
  1041.         shm_id = 0;
  1042.         break;
  1043.        
  1044.     case FB_SHM2PIXMAP:
  1045.         if (!shm) {
  1046.             retval = EINVAL;
  1047.             break;
  1048.         }
  1049.         retval = shm2pixmap(shm, shm_size);
  1050.         break;
  1051.     case FB_DRAW_PPM:
  1052.         if (!shm) {
  1053.             retval = EINVAL;
  1054.             break;
  1055.         }
  1056.         x = IPC_GET_ARG1(*call);
  1057.         y = IPC_GET_ARG2(*call);
  1058.        
  1059.         if ((x > vport->width) || (y > vport->height)) {
  1060.             retval = EINVAL;
  1061.             break;
  1062.         }
  1063.        
  1064.         ppm_draw(shm, shm_size, IPC_GET_ARG1(*call),
  1065.             IPC_GET_ARG2(*call), vport->width - x, vport->height - y, putpixel, (void *) vport);
  1066.         break;
  1067.     case FB_DRAW_TEXT_DATA:
  1068.         x = IPC_GET_ARG1(*call);
  1069.         y = IPC_GET_ARG2(*call);
  1070.         w = IPC_GET_ARG3(*call);
  1071.         h = IPC_GET_ARG4(*call);
  1072.         if (!interbuffer) {
  1073.             retval = EINVAL;
  1074.             break;
  1075.         }
  1076.         if (x + w > vport->cols || y + h > vport->rows) {
  1077.             retval = EINVAL;
  1078.             break;
  1079.         }
  1080.         if (intersize < w * h * sizeof(*interbuffer)) {
  1081.             retval = EINVAL;
  1082.             break;
  1083.         }
  1084.         draw_text_data(vport, interbuffer, x, y, w, h);
  1085.         break;
  1086.     default:
  1087.         handled = false;
  1088.     }
  1089.    
  1090.     if (handled)
  1091.         ipc_answer_0(callid, retval);
  1092.     return handled;
  1093. }
  1094.  
  1095.  
  1096. static void copy_vp_to_pixmap(viewport_t *vport, pixmap_t *pmap)
  1097. {
  1098.     unsigned int width = vport->width;
  1099.     unsigned int height = vport->height;
  1100.    
  1101.     if (width + vport->x > screen.xres)
  1102.         width = screen.xres - vport->x;
  1103.     if (height + vport->y > screen.yres)
  1104.         height = screen.yres - vport->y;
  1105.    
  1106.     unsigned int realwidth = pmap->width <= width ? pmap->width : width;
  1107.     unsigned int realheight = pmap->height <= height ? pmap->height : height;
  1108.    
  1109.     unsigned int srcrowsize = vport->width * screen.pixelbytes;
  1110.     unsigned int realrowsize = realwidth * screen.pixelbytes;
  1111.    
  1112.     unsigned int y;
  1113.     for (y = 0; y < realheight; y++) {
  1114.         unsigned int tmp = (vport->y + y) * screen.scanline + vport->x * screen.pixelbytes;
  1115.         memcpy(pmap->data + srcrowsize * y, screen.fb_addr + tmp, realrowsize);
  1116.     }
  1117. }
  1118.  
  1119.  
  1120. /** Save viewport to pixmap
  1121.  *
  1122.  */
  1123. static int save_vp_to_pixmap(viewport_t *vport)
  1124. {
  1125.     int pm;
  1126.     pixmap_t *pmap;
  1127.    
  1128.     pm = find_free_pixmap();
  1129.     if (pm == -1)
  1130.         return ELIMIT;
  1131.    
  1132.     pmap = &pixmaps[pm];
  1133.     pmap->data = malloc(screen.pixelbytes * vport->width * vport->height);
  1134.     if (!pmap->data)
  1135.         return ENOMEM;
  1136.    
  1137.     pmap->width = vport->width;
  1138.     pmap->height = vport->height;
  1139.    
  1140.     copy_vp_to_pixmap(vport, pmap);
  1141.    
  1142.     return pm;
  1143. }
  1144.  
  1145.  
  1146. /** Draw pixmap on screen
  1147.  *
  1148.  * @param vp Viewport to draw on
  1149.  * @param pm Pixmap identifier
  1150.  *
  1151.  */
  1152. static int draw_pixmap(int vp, int pm)
  1153. {
  1154.     pixmap_t *pmap = &pixmaps[pm];
  1155.     viewport_t *vport = &viewports[vp];
  1156.    
  1157.     unsigned int width = vport->width;
  1158.     unsigned int height = vport->height;
  1159.    
  1160.     if (width + vport->x > screen.xres)
  1161.         width = screen.xres - vport->x;
  1162.     if (height + vport->y > screen.yres)
  1163.         height = screen.yres - vport->y;
  1164.    
  1165.     if (!pmap->data)
  1166.         return EINVAL;
  1167.    
  1168.     unsigned int realwidth = pmap->width <= width ? pmap->width : width;
  1169.     unsigned int realheight = pmap->height <= height ? pmap->height : height;
  1170.    
  1171.     unsigned int srcrowsize = vport->width * screen.pixelbytes;
  1172.     unsigned int realrowsize = realwidth * screen.pixelbytes;
  1173.    
  1174.     unsigned int y;
  1175.     for (y = 0; y < realheight; y++) {
  1176.         unsigned int tmp = (vport->y + y) * screen.scanline + vport->x * screen.pixelbytes;
  1177.         memcpy(screen.fb_addr + tmp, pmap->data + y * srcrowsize, realrowsize);
  1178.     }
  1179.    
  1180.     return EOK;
  1181. }
  1182.  
  1183.  
  1184. /** Tick animation one step forward
  1185.  *
  1186.  */
  1187. static void anims_tick(void)
  1188. {
  1189.     unsigned int i;
  1190.     static int counts = 0;
  1191.    
  1192.     /* Limit redrawing */
  1193.     counts = (counts + 1) % 8;
  1194.     if (counts)
  1195.         return;
  1196.  
  1197.     for (i = 0; i < MAX_ANIMATIONS; i++) {
  1198.         if ((!animations[i].animlen) || (!animations[i].initialized) ||
  1199.             (!animations[i].enabled))
  1200.             continue;
  1201.        
  1202.         draw_pixmap(animations[i].vp, animations[i].pixmaps[animations[i].pos]);
  1203.         animations[i].pos = (animations[i].pos + 1) % animations[i].animlen;
  1204.     }
  1205. }
  1206.  
  1207.  
  1208. static unsigned int pointer_x;
  1209. static unsigned int pointer_y;
  1210. static bool pointer_shown, pointer_enabled;
  1211. static int pointer_vport = -1;
  1212. static int pointer_pixmap = -1;
  1213.  
  1214.  
  1215. static void mouse_show(void)
  1216. {
  1217.     int i, j;
  1218.     int visibility;
  1219.     int color;
  1220.     int bytepos;
  1221.    
  1222.     if ((pointer_shown) || (!pointer_enabled))
  1223.         return;
  1224.    
  1225.     /* Save image under the pointer. */
  1226.     if (pointer_vport == -1) {
  1227.         pointer_vport = vport_create(pointer_x, pointer_y, pointer_width, pointer_height);
  1228.         if (pointer_vport < 0)
  1229.             return;
  1230.     } else {
  1231.         viewports[pointer_vport].x = pointer_x;
  1232.         viewports[pointer_vport].y = pointer_y;
  1233.     }
  1234.    
  1235.     if (pointer_pixmap == -1)
  1236.         pointer_pixmap = save_vp_to_pixmap(&viewports[pointer_vport]);
  1237.     else
  1238.         copy_vp_to_pixmap(&viewports[pointer_vport], &pixmaps[pointer_pixmap]);
  1239.    
  1240.     /* Draw mouse pointer. */
  1241.     for (i = 0; i < pointer_height; i++)
  1242.         for (j = 0; j < pointer_width; j++) {
  1243.             bytepos = i * ((pointer_width - 1) / 8 + 1) + j / 8;
  1244.             visibility = pointer_mask_bits[bytepos] &
  1245.                 (1 << (j % 8));
  1246.             if (visibility) {
  1247.                 color = pointer_bits[bytepos] &
  1248.                     (1 << (j % 8)) ? 0 : 0xffffff;
  1249.                 if (pointer_x + j < screen.xres && pointer_y +
  1250.                     i < screen.yres)
  1251.                     putpixel(&viewports[0], pointer_x + j,
  1252.                         pointer_y + i, color);
  1253.             }
  1254.         }
  1255.     pointer_shown = 1;
  1256. }
  1257.  
  1258.  
  1259. static void mouse_hide(void)
  1260. {
  1261.     /* Restore image under the pointer. */
  1262.     if (pointer_shown) {
  1263.         draw_pixmap(pointer_vport, pointer_pixmap);
  1264.         pointer_shown = 0;
  1265.     }
  1266. }
  1267.  
  1268.  
  1269. static void mouse_move(unsigned int x, unsigned int y)
  1270. {
  1271.     mouse_hide();
  1272.     pointer_x = x;
  1273.     pointer_y = y;
  1274.     mouse_show();
  1275. }
  1276.  
  1277.  
  1278. static int anim_handle(ipc_callid_t callid, ipc_call_t *call, int vp)
  1279. {
  1280.     bool handled = true;
  1281.     int retval = EOK;
  1282.     int i, nvp;
  1283.     int newval;
  1284.    
  1285.     switch (IPC_GET_METHOD(*call)) {
  1286.     case FB_ANIM_CREATE:
  1287.         nvp = IPC_GET_ARG1(*call);
  1288.         if (nvp == -1)
  1289.             nvp = vp;
  1290.         if (nvp >= MAX_VIEWPORTS || nvp < 0 ||
  1291.             !viewports[nvp].initialized) {
  1292.             retval = EINVAL;
  1293.             break;
  1294.         }
  1295.         for (i = 0; i < MAX_ANIMATIONS; i++) {
  1296.             if (!animations[i].initialized)
  1297.                 break;
  1298.         }
  1299.         if (i == MAX_ANIMATIONS) {
  1300.             retval = ELIMIT;
  1301.             break;
  1302.         }
  1303.         animations[i].initialized = 1;
  1304.         animations[i].animlen = 0;
  1305.         animations[i].pos = 0;
  1306.         animations[i].enabled = 0;
  1307.         animations[i].vp = nvp;
  1308.         retval = i;
  1309.         break;
  1310.     case FB_ANIM_DROP:
  1311.         i = IPC_GET_ARG1(*call);
  1312.         if (i >= MAX_ANIMATIONS || i < 0) {
  1313.             retval = EINVAL;
  1314.             break;
  1315.         }
  1316.         animations[i].initialized = 0;
  1317.         break;
  1318.     case FB_ANIM_ADDPIXMAP:
  1319.         i = IPC_GET_ARG1(*call);
  1320.         if (i >= MAX_ANIMATIONS || i < 0 ||
  1321.             !animations[i].initialized) {
  1322.             retval = EINVAL;
  1323.             break;
  1324.         }
  1325.         if (animations[i].animlen == MAX_ANIM_LEN) {
  1326.             retval = ELIMIT;
  1327.             break;
  1328.         }
  1329.         newval = IPC_GET_ARG2(*call);
  1330.         if (newval < 0 || newval > MAX_PIXMAPS ||
  1331.             !pixmaps[newval].data) {
  1332.             retval = EINVAL;
  1333.             break;
  1334.         }
  1335.         animations[i].pixmaps[animations[i].animlen++] = newval;
  1336.         break;
  1337.     case FB_ANIM_CHGVP:
  1338.         i = IPC_GET_ARG1(*call);
  1339.         if (i >= MAX_ANIMATIONS || i < 0) {
  1340.             retval = EINVAL;
  1341.             break;
  1342.         }
  1343.         nvp = IPC_GET_ARG2(*call);
  1344.         if (nvp == -1)
  1345.             nvp = vp;
  1346.         if (nvp >= MAX_VIEWPORTS || nvp < 0 ||
  1347.             !viewports[nvp].initialized) {
  1348.             retval = EINVAL;
  1349.             break;
  1350.         }
  1351.         animations[i].vp = nvp;
  1352.         break;
  1353.     case FB_ANIM_START:
  1354.     case FB_ANIM_STOP:
  1355.         i = IPC_GET_ARG1(*call);
  1356.         if (i >= MAX_ANIMATIONS || i < 0) {
  1357.             retval = EINVAL;
  1358.             break;
  1359.         }
  1360.         newval = (IPC_GET_METHOD(*call) == FB_ANIM_START);
  1361.         if (newval ^ animations[i].enabled) {
  1362.             animations[i].enabled = newval;
  1363.             anims_enabled += newval ? 1 : -1;
  1364.         }
  1365.         break;
  1366.     default:
  1367.         handled = 0;
  1368.     }
  1369.     if (handled)
  1370.         ipc_answer_0(callid, retval);
  1371.     return handled;
  1372. }
  1373.  
  1374.  
  1375. /** Handler for messages concerning pixmap handling
  1376.  *
  1377.  */
  1378. static int pixmap_handle(ipc_callid_t callid, ipc_call_t *call, int vp)
  1379. {
  1380.     bool handled = true;
  1381.     int retval = EOK;
  1382.     int i, nvp;
  1383.    
  1384.     switch (IPC_GET_METHOD(*call)) {
  1385.     case FB_VP_DRAW_PIXMAP:
  1386.         nvp = IPC_GET_ARG1(*call);
  1387.         if (nvp == -1)
  1388.             nvp = vp;
  1389.         if (nvp < 0 || nvp >= MAX_VIEWPORTS ||
  1390.             !viewports[nvp].initialized) {
  1391.             retval = EINVAL;
  1392.             break;
  1393.         }
  1394.         i = IPC_GET_ARG2(*call);
  1395.         retval = draw_pixmap(nvp, i);
  1396.         break;
  1397.     case FB_VP2PIXMAP:
  1398.         nvp = IPC_GET_ARG1(*call);
  1399.         if (nvp == -1)
  1400.             nvp = vp;
  1401.         if (nvp < 0 || nvp >= MAX_VIEWPORTS ||
  1402.             !viewports[nvp].initialized)
  1403.             retval = EINVAL;
  1404.         else
  1405.             retval = save_vp_to_pixmap(&viewports[nvp]);
  1406.         break;
  1407.     case FB_DROP_PIXMAP:
  1408.         i = IPC_GET_ARG1(*call);
  1409.         if (i >= MAX_PIXMAPS) {
  1410.             retval = EINVAL;
  1411.             break;
  1412.         }
  1413.         if (pixmaps[i].data) {
  1414.             free(pixmaps[i].data);
  1415.             pixmaps[i].data = NULL;
  1416.         }
  1417.         break;
  1418.     default:
  1419.         handled = 0;
  1420.     }
  1421.    
  1422.     if (handled)
  1423.         ipc_answer_0(callid, retval);
  1424.     return handled;
  1425.    
  1426. }
  1427.  
  1428. static int rgb_from_style(attr_rgb_t *rgb, int style)
  1429. {
  1430.     switch (style) {
  1431.     case STYLE_NORMAL:
  1432.         rgb->fg_color = color_table[COLOR_BLACK];
  1433.         rgb->bg_color = color_table[COLOR_WHITE];
  1434.         break;
  1435.     case STYLE_EMPHASIS:
  1436.         rgb->fg_color = color_table[COLOR_RED];
  1437.         rgb->bg_color = color_table[COLOR_WHITE];
  1438.         break;
  1439.     default:
  1440.         return EINVAL;
  1441.     }
  1442.  
  1443.     return EOK;
  1444. }
  1445.  
  1446. static int rgb_from_idx(attr_rgb_t *rgb, ipcarg_t fg_color,
  1447.     ipcarg_t bg_color, ipcarg_t flags)
  1448. {
  1449.     fg_color = (fg_color & 7) | ((flags & CATTR_BRIGHT) ? 8 : 0);
  1450.     bg_color = (bg_color & 7) | ((flags & CATTR_BRIGHT) ? 8 : 0);
  1451.  
  1452.     rgb->fg_color = color_table[fg_color];
  1453.     rgb->bg_color = color_table[bg_color];
  1454.  
  1455.     return EOK;
  1456. }
  1457.  
  1458. static int rgb_from_attr(attr_rgb_t *rgb, const attrs_t *a)
  1459. {
  1460.     int rc;
  1461.  
  1462.     switch (a->t) {
  1463.     case at_style:
  1464.         rc = rgb_from_style(rgb, a->a.s.style);
  1465.         break;
  1466.     case at_idx:
  1467.         rc = rgb_from_idx(rgb, a->a.i.fg_color,
  1468.             a->a.i.bg_color, a->a.i.flags);
  1469.         break;
  1470.     case at_rgb:
  1471.         *rgb = a->a.r;
  1472.         rc = EOK;
  1473.         break;
  1474.     }
  1475.  
  1476.     return rc;
  1477. }
  1478.  
  1479. static int fb_set_style(viewport_t *vport, ipcarg_t style)
  1480. {
  1481.     return rgb_from_style(&vport->attr, (int) style);
  1482. }
  1483.  
  1484. static int fb_set_color(viewport_t *vport, ipcarg_t fg_color,
  1485.     ipcarg_t bg_color, ipcarg_t flags)
  1486. {
  1487.     return rgb_from_idx(&vport->attr, fg_color, bg_color, flags);
  1488. }
  1489.  
  1490. /** Function for handling connections to FB
  1491.  *
  1492.  */
  1493. static void fb_client_connection(ipc_callid_t iid, ipc_call_t *icall)
  1494. {
  1495.     unsigned int vp = 0;
  1496.     viewport_t *vport = &viewports[vp];
  1497.    
  1498.     if (client_connected) {
  1499.         ipc_answer_0(iid, ELIMIT);
  1500.         return;
  1501.     }
  1502.    
  1503.     /* Accept connection */
  1504.     client_connected = true;
  1505.     ipc_answer_0(iid, EOK);
  1506.    
  1507.     while (true) {
  1508.         ipc_callid_t callid;
  1509.         ipc_call_t call;
  1510.         int retval;
  1511.         unsigned int i;
  1512.         int scroll;
  1513.         uint8_t glyph;
  1514.         unsigned int row, col;
  1515.        
  1516.         if ((vport->cursor_active) || (anims_enabled))
  1517.             callid = async_get_call_timeout(&call, 250000);
  1518.         else
  1519.             callid = async_get_call(&call);
  1520.        
  1521.         mouse_hide();
  1522.         if (!callid) {
  1523.             cursor_blink(vport);
  1524.             anims_tick();
  1525.             mouse_show();
  1526.             continue;
  1527.         }
  1528.        
  1529.         if (shm_handle(callid, &call, vp))
  1530.             continue;
  1531.        
  1532.         if (pixmap_handle(callid, &call, vp))
  1533.             continue;
  1534.        
  1535.         if (anim_handle(callid, &call, vp))
  1536.             continue;
  1537.        
  1538.         switch (IPC_GET_METHOD(call)) {
  1539.         case IPC_M_PHONE_HUNGUP:
  1540.             client_connected = false;
  1541.            
  1542.             /* Cleanup other viewports */
  1543.             for (i = 1; i < MAX_VIEWPORTS; i++)
  1544.                 vport->initialized = false;
  1545.            
  1546.             /* Exit thread */
  1547.             return;
  1548.        
  1549.         case FB_PUTCHAR:
  1550.             glyph = IPC_GET_ARG1(call);
  1551.             row = IPC_GET_ARG2(call);
  1552.             col = IPC_GET_ARG3(call);
  1553.            
  1554.             if ((col >= vport->cols) || (row >= vport->rows)) {
  1555.                 retval = EINVAL;
  1556.                 break;
  1557.             }
  1558.             ipc_answer_0(callid, EOK);
  1559.            
  1560.             draw_char(vport, glyph, col, row);
  1561.            
  1562.             /* Message already answered */
  1563.             continue;
  1564.         case FB_CLEAR:
  1565.             vport_clear(vport);
  1566.             cursor_show(vport);
  1567.             retval = EOK;
  1568.             break;
  1569.         case FB_CURSOR_GOTO:
  1570.             row = IPC_GET_ARG1(call);
  1571.             col = IPC_GET_ARG2(call);
  1572.            
  1573.             if ((col >= vport->cols) || (row >= vport->rows)) {
  1574.                 retval = EINVAL;
  1575.                 break;
  1576.             }
  1577.             retval = EOK;
  1578.            
  1579.             cursor_hide(vport);
  1580.             vport->cur_col = col;
  1581.             vport->cur_row = row;
  1582.             cursor_show(vport);
  1583.             break;
  1584.         case FB_CURSOR_VISIBILITY:
  1585.             cursor_hide(vport);
  1586.             vport->cursor_active = IPC_GET_ARG1(call);
  1587.             cursor_show(vport);
  1588.             retval = EOK;
  1589.             break;
  1590.         case FB_GET_CSIZE:
  1591.             ipc_answer_2(callid, EOK, vport->rows, vport->cols);
  1592.             continue;
  1593.         case FB_SCROLL:
  1594.             scroll = IPC_GET_ARG1(call);
  1595.             if ((scroll > (int) vport->rows) || (scroll < (-(int) vport->rows))) {
  1596.                 retval = EINVAL;
  1597.                 break;
  1598.             }
  1599.             cursor_hide(vport);
  1600.             vport_scroll(vport, scroll);
  1601.             cursor_show(vport);
  1602.             retval = EOK;
  1603.             break;
  1604.         case FB_VIEWPORT_SWITCH:
  1605.             i = IPC_GET_ARG1(call);
  1606.             if (i >= MAX_VIEWPORTS) {
  1607.                 retval = EINVAL;
  1608.                 break;
  1609.             }
  1610.             if (!viewports[i].initialized) {
  1611.                 retval = EADDRNOTAVAIL;
  1612.                 break;
  1613.             }
  1614.             cursor_hide(vport);
  1615.             vp = i;
  1616.             vport = &viewports[vp];
  1617.             cursor_show(vport);
  1618.             retval = EOK;
  1619.             break;
  1620.         case FB_VIEWPORT_CREATE:
  1621.             retval = vport_create(IPC_GET_ARG1(call) >> 16,
  1622.                 IPC_GET_ARG1(call) & 0xffff,
  1623.                 IPC_GET_ARG2(call) >> 16,
  1624.                 IPC_GET_ARG2(call) & 0xffff);
  1625.             break;
  1626.         case FB_VIEWPORT_DELETE:
  1627.             i = IPC_GET_ARG1(call);
  1628.             if (i >= MAX_VIEWPORTS) {
  1629.                 retval = EINVAL;
  1630.                 break;
  1631.             }
  1632.             if (!viewports[i].initialized) {
  1633.                 retval = EADDRNOTAVAIL;
  1634.                 break;
  1635.             }
  1636.             viewports[i].initialized = false;
  1637.             if (viewports[i].glyphs)
  1638.                 free(viewports[i].glyphs);
  1639.             if (viewports[i].bgpixel)
  1640.                 free(viewports[i].bgpixel);
  1641.             if (viewports[i].backbuf)
  1642.                 free(viewports[i].backbuf);
  1643.             retval = EOK;
  1644.             break;
  1645.         case FB_SET_STYLE:
  1646.             retval = fb_set_style(vport, IPC_GET_ARG1(call));
  1647.             break;
  1648.         case FB_SET_COLOR:
  1649.             retval = fb_set_color(vport, IPC_GET_ARG1(call),
  1650.                 IPC_GET_ARG2(call), IPC_GET_ARG3(call));
  1651.             break;
  1652.         case FB_SET_RGB_COLOR:
  1653.             vport->attr.fg_color = IPC_GET_ARG1(call);
  1654.             vport->attr.bg_color = IPC_GET_ARG2(call);
  1655.             retval = EOK;
  1656.             break;
  1657.         case FB_GET_RESOLUTION:
  1658.             ipc_answer_2(callid, EOK, screen.xres, screen.yres);
  1659.             continue;
  1660.         case FB_POINTER_MOVE:
  1661.             pointer_enabled = true;
  1662.             mouse_move(IPC_GET_ARG1(call), IPC_GET_ARG2(call));
  1663.             retval = EOK;
  1664.             break;
  1665.         default:
  1666.             retval = ENOENT;
  1667.         }
  1668.         ipc_answer_0(callid, retval);
  1669.     }
  1670. }
  1671.  
  1672. /** Initialization of framebuffer
  1673.  *
  1674.  */
  1675. int fb_init(void)
  1676. {
  1677.     async_set_client_connection(fb_client_connection);
  1678.    
  1679.     void *fb_ph_addr = (void *) sysinfo_value("fb.address.physical");
  1680.     unsigned int fb_offset = sysinfo_value("fb.offset");
  1681.     unsigned int fb_width = sysinfo_value("fb.width");
  1682.     unsigned int fb_height = sysinfo_value("fb.height");
  1683.     unsigned int fb_scanline = sysinfo_value("fb.scanline");
  1684.     unsigned int fb_visual = sysinfo_value("fb.visual");
  1685.    
  1686.     unsigned int fbsize = fb_scanline * fb_height;
  1687.     void *fb_addr = as_get_mappable_page(fbsize);
  1688.    
  1689.     if (physmem_map(fb_ph_addr + fb_offset, fb_addr,
  1690.         ALIGN_UP(fbsize, PAGE_SIZE) >> PAGE_WIDTH, AS_AREA_READ | AS_AREA_WRITE) != 0)
  1691.         return -1;
  1692.    
  1693.     if (screen_init(fb_addr, fb_width, fb_height, fb_scanline, fb_visual))
  1694.         return 0;
  1695.    
  1696.     return -1;
  1697. }
  1698.  
  1699. /**
  1700.  * @}
  1701.  */
  1702.