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  1. /*
  2.  * Copyright (c) 2008 Martin Decky
  3.  * Copyright (c) 2006 Jakub Vana
  4.  * Copyright (c) 2006 Ondrej Palkovsky
  5.  * All rights reserved.
  6.  *
  7.  * Redistribution and use in source and binary forms, with or without
  8.  * modification, are permitted provided that the following conditions
  9.  * are met:
  10.  *
  11.  * - Redistributions of source code must retain the above copyright
  12.  *   notice, this list of conditions and the following disclaimer.
  13.  * - Redistributions in binary form must reproduce the above copyright
  14.  *   notice, this list of conditions and the following disclaimer in the
  15.  *   documentation and/or other materials provided with the distribution.
  16.  * - The name of the author may not be used to endorse or promote products
  17.  *   derived from this software without specific prior written permission.
  18.  *
  19.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  20.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  21.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  22.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  23.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  24.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  25.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  26.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  27.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  28.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  29.  */
  30.  
  31. /**
  32.  * @defgroup fb Graphical framebuffer
  33.  * @brief   HelenOS graphical framebuffer.
  34.  * @ingroup fbs
  35.  * @{
  36.  */
  37.  
  38. /** @file
  39.  */
  40.  
  41. #include <stdlib.h>
  42. #include <unistd.h>
  43. #include <string.h>
  44. #include <ddi.h>
  45. #include <sysinfo.h>
  46. #include <align.h>
  47. #include <as.h>
  48. #include <ipc/fb.h>
  49. #include <ipc/ipc.h>
  50. #include <ipc/ns.h>
  51. #include <ipc/services.h>
  52. #include <kernel/errno.h>
  53. #include <kernel/genarch/fb/visuals.h>
  54. #include <console/color.h>
  55. #include <console/style.h>
  56. #include <async.h>
  57. #include <bool.h>
  58.  
  59. #include "font-8x16.h"
  60. #include "fb.h"
  61. #include "main.h"
  62. #include "../console/screenbuffer.h"
  63. #include "ppm.h"
  64.  
  65. #include "pointer.xbm"
  66. #include "pointer_mask.xbm"
  67.  
  68. #define DEFAULT_BGCOLOR  0xf0f0f0
  69. #define DEFAULT_FGCOLOR  0x000000
  70.  
  71. #define GLYPH_UNAVAIL   '?'
  72.  
  73. #define MAX_ANIM_LEN     8
  74. #define MAX_ANIMATIONS   4
  75. #define MAX_PIXMAPS      256  /**< Maximum number of saved pixmaps */
  76. #define MAX_VIEWPORTS    128  /**< Viewport is a rectangular area on the screen */
  77.  
  78. /** Function to render a pixel from a RGB value. */
  79. typedef void (*rgb_conv_t)(void *, uint32_t);
  80.  
  81. /** Function to draw a glyph. */
  82. typedef void (*dg_t)(unsigned int x, unsigned int y, bool cursor,
  83.     uint8_t *glyphs, uint32_t glyph, uint32_t fg_color, uint32_t bg_color);
  84.  
  85. struct {
  86.     uint8_t *fb_addr;
  87.    
  88.     unsigned int xres;
  89.     unsigned int yres;
  90.    
  91.     unsigned int scanline;
  92.     unsigned int glyphscanline;
  93.    
  94.     unsigned int pixelbytes;
  95.     unsigned int glyphbytes;
  96.    
  97.     rgb_conv_t rgb_conv;
  98. } screen;
  99.  
  100. /** Backbuffer character cell. */
  101. typedef struct {
  102.     uint32_t glyph;
  103.     uint32_t fg_color;
  104.     uint32_t bg_color;
  105. } bb_cell_t;
  106.  
  107. typedef struct {
  108.     bool initialized;
  109.     unsigned int x;
  110.     unsigned int y;
  111.     unsigned int width;
  112.     unsigned int height;
  113.    
  114.     /* Text support in window */
  115.     unsigned int cols;
  116.     unsigned int rows;
  117.    
  118.     /*
  119.      * Style and glyphs for text printing
  120.      */
  121.  
  122.     /** Current attributes. */
  123.     attr_rgb_t attr;
  124.  
  125.     /** Pre-rendered mask for rendering glyphs. Different viewports
  126.      * might use different drawing functions depending on whether their
  127.      * scanlines are aligned on a word boundary.*/
  128.     uint8_t *glyphs;
  129.  
  130.     uint8_t *bgpixel;
  131.  
  132.     /** Glyph drawing function for this viewport. */
  133.     dg_t dglyph;
  134.    
  135.     /* Auto-cursor position */
  136.     bool cursor_active;
  137.     unsigned int cur_col;
  138.     unsigned int cur_row;
  139.     bool cursor_shown;
  140.    
  141.     /* Back buffer */
  142.     bb_cell_t *backbuf;
  143.     unsigned int bbsize;
  144. } viewport_t;
  145.  
  146. typedef struct {
  147.     bool initialized;
  148.     bool enabled;
  149.     unsigned int vp;
  150.    
  151.     unsigned int pos;
  152.     unsigned int animlen;
  153.     unsigned int pixmaps[MAX_ANIM_LEN];
  154. } animation_t;
  155.  
  156. static animation_t animations[MAX_ANIMATIONS];
  157. static bool anims_enabled;
  158.  
  159. typedef struct {
  160.     unsigned int width;
  161.     unsigned int height;
  162.     uint8_t *data;
  163. } pixmap_t;
  164.  
  165. static pixmap_t pixmaps[MAX_PIXMAPS];
  166. static viewport_t viewports[128];
  167.  
  168. static bool client_connected = false;  /**< Allow only 1 connection */
  169.  
  170. static uint32_t color_table[16] = {
  171.     [COLOR_BLACK]       = 0x000000,
  172.     [COLOR_BLUE]        = 0x0000f0,
  173.     [COLOR_GREEN]       = 0x00f000,
  174.     [COLOR_CYAN]        = 0x00f0f0,
  175.     [COLOR_RED]     = 0xf00000,
  176.     [COLOR_MAGENTA]     = 0xf000f0,
  177.     [COLOR_YELLOW]      = 0xf0f000,
  178.     [COLOR_WHITE]       = 0xf0f0f0,
  179.  
  180.     [8 + COLOR_BLACK]   = 0x000000,
  181.     [8 + COLOR_BLUE]    = 0x0000ff,
  182.     [8 + COLOR_GREEN]   = 0x00ff00,
  183.     [8 + COLOR_CYAN]    = 0x00ffff,
  184.     [8 + COLOR_RED]     = 0xff0000,
  185.     [8 + COLOR_MAGENTA] = 0xff00ff,
  186.     [8 + COLOR_YELLOW]  = 0xffff00,
  187.     [8 + COLOR_WHITE]   = 0xffffff,
  188. };
  189.  
  190. static int rgb_from_attr(attr_rgb_t *rgb, const attrs_t *a);
  191. static int rgb_from_style(attr_rgb_t *rgb, int style);
  192. static int rgb_from_idx(attr_rgb_t *rgb, ipcarg_t fg_color,
  193.     ipcarg_t bg_color, ipcarg_t flags);
  194.  
  195. static int fb_set_color(viewport_t *vport, ipcarg_t fg_color,
  196.     ipcarg_t bg_color, ipcarg_t attr);
  197.  
  198. static void draw_glyph_aligned(unsigned int x, unsigned int y, bool cursor,
  199.     uint8_t *glyphs, uint32_t glyph, uint32_t fg_color, uint32_t bg_color);
  200. static void draw_glyph_fallback(unsigned int x, unsigned int y, bool cursor,
  201.     uint8_t *glyphs, uint32_t glyph, uint32_t fg_color, uint32_t bg_color);
  202.  
  203. static void draw_vp_glyph(viewport_t *vport, bool cursor, unsigned int col,
  204.     unsigned int row);
  205.  
  206.  
  207. #define RED(x, bits)                 ((x >> (8 + 8 + 8 - bits)) & ((1 << bits) - 1))
  208. #define GREEN(x, bits)               ((x >> (8 + 8 - bits)) & ((1 << bits) - 1))
  209. #define BLUE(x, bits)                ((x >> (8 - bits)) & ((1 << bits) - 1))
  210.  
  211. #define COL2X(col)                   ((col) * FONT_WIDTH)
  212. #define ROW2Y(row)                   ((row) * FONT_SCANLINES)
  213.  
  214. #define X2COL(x)                     ((x) / FONT_WIDTH)
  215. #define Y2ROW(y)                     ((y) / FONT_SCANLINES)
  216.  
  217. #define FB_POS(x, y)                 ((y) * screen.scanline + (x) * screen.pixelbytes)
  218. #define BB_POS(vport, col, row)      ((row) * vport->cols + (col))
  219. #define GLYPH_POS(glyph, y, cursor)  (((glyph) + (cursor) * FONT_GLYPHS) * screen.glyphbytes + (y) * screen.glyphscanline)
  220.  
  221.  
  222. /** ARGB 8:8:8:8 conversion
  223.  *
  224.  */
  225. static void rgb_0888(void *dst, uint32_t rgb)
  226. {
  227.     *((uint32_t *) dst) = rgb & 0xffffff;
  228. }
  229.  
  230.  
  231. /** ABGR 8:8:8:8 conversion
  232.  *
  233.  */
  234. static void bgr_0888(void *dst, uint32_t rgb)
  235. {
  236.     *((uint32_t *) dst)
  237.         = (BLUE(rgb, 8) << 16) | (GREEN(rgb, 8) << 8) | RED(rgb, 8);
  238. }
  239.  
  240.  
  241. /** RGB 8:8:8 conversion
  242.  *
  243.  */
  244. static void rgb_888(void *dst, uint32_t rgb)
  245. {
  246.     ((uint8_t *) dst)[0] = BLUE(rgb, 8);
  247.     ((uint8_t *) dst)[1] = GREEN(rgb, 8);
  248.     ((uint8_t *) dst)[2] = RED(rgb, 8);
  249. }
  250.  
  251.  
  252. /** BGR 8:8:8 conversion
  253.  *
  254.  */
  255. static void bgr_888(void *dst, uint32_t rgb)
  256. {
  257.     ((uint8_t *) dst)[0] = RED(rgb, 8);
  258.     ((uint8_t *) dst)[1] = GREEN(rgb, 8);
  259.     ((uint8_t *) dst)[2] = BLUE(rgb, 8);
  260. }
  261.  
  262.  
  263. /** RGB 5:5:5 conversion
  264.  *
  265.  */
  266. static void rgb_555(void *dst, uint32_t rgb)
  267. {
  268.     *((uint16_t *) dst)
  269.         = (RED(rgb, 5) << 10) | (GREEN(rgb, 5) << 5) | BLUE(rgb, 5);
  270. }
  271.  
  272.  
  273. /** RGB 5:6:5 conversion
  274.  *
  275.  */
  276. static void rgb_565(void *dst, uint32_t rgb)
  277. {
  278.     *((uint16_t *) dst)
  279.         = (RED(rgb, 5) << 11) | (GREEN(rgb, 6) << 5) | BLUE(rgb, 5);
  280. }
  281.  
  282.  
  283. /** RGB 3:2:3
  284.  *
  285.  */
  286. static void rgb_323(void *dst, uint32_t rgb)
  287. {
  288.     *((uint8_t *) dst)
  289.         = ~((RED(rgb, 3) << 5) | (GREEN(rgb, 2) << 3) | BLUE(rgb, 3));
  290. }
  291.  
  292. /** Draw a filled rectangle.
  293.  *
  294.  * @note Need real implementation that does not access VRAM twice.
  295.  */
  296. static void draw_filled_rect(unsigned int x0, unsigned int y0, unsigned int x1,
  297.     unsigned int y1, uint32_t color)
  298. {
  299.     unsigned int x, y;
  300.     unsigned int copy_bytes;
  301.  
  302.     uint8_t *sp, *dp;
  303.     uint8_t cbuf[4];
  304.  
  305.     if (y0 >= y1 || x0 >= x1) return;
  306.     screen.rgb_conv(cbuf, color);
  307.  
  308.     sp = &screen.fb_addr[FB_POS(x0, y0)];
  309.     dp = sp;
  310.  
  311.     /* Draw the first line. */
  312.     for (x = x0; x < x1; x++) {
  313.         memcpy(dp, cbuf, screen.pixelbytes);
  314.         dp += screen.pixelbytes;
  315.     }
  316.  
  317.     dp = sp + screen.scanline;
  318.     copy_bytes = (x1 - x0) * screen.pixelbytes;
  319.  
  320.     /* Draw the remaining lines by copying. */
  321.     for (y = y0 + 1; y < y1; y++) {
  322.         memcpy(dp, sp, copy_bytes);
  323.         dp += screen.scanline;
  324.     }
  325. }
  326.  
  327. /** Redraw viewport.
  328.  *
  329.  * @param vport Viewport to redraw
  330.  *
  331.  */
  332. static void vport_redraw(viewport_t *vport)
  333. {
  334.     unsigned int row, col;
  335.  
  336.     for (row = 0; row < vport->rows; row++) {
  337.         for (col = 0; col < vport->cols; col++) {
  338.             draw_vp_glyph(vport, false, col, row);
  339.         }
  340.     }
  341.  
  342.     if (COL2X(vport->cols) < vport->width) {
  343.         draw_filled_rect(
  344.             vport->x + COL2X(vport->cols), vport->y,
  345.             vport->x + vport->width, vport->y + vport->height,
  346.             vport->attr.bg_color);
  347.     }
  348.  
  349.     if (ROW2Y(vport->rows) < vport->height) {
  350.         draw_filled_rect(
  351.             vport->x, vport->y + ROW2Y(vport->rows),
  352.             vport->x + vport->width, vport->y + vport->height,
  353.             vport->attr.bg_color);
  354.     }
  355. }
  356.  
  357. static void backbuf_clear(bb_cell_t *backbuf, size_t len, uint32_t fg_color,
  358.     uint32_t bg_color)
  359. {
  360.     unsigned i;
  361.  
  362.     for (i = 0; i < len; i++) {
  363.         backbuf[i].glyph = 0;
  364.         backbuf[i].fg_color = fg_color;
  365.         backbuf[i].bg_color = bg_color;
  366.     }
  367. }
  368.  
  369. /** Clear viewport.
  370.  *
  371.  * @param vport Viewport to clear
  372.  *
  373.  */
  374. static void vport_clear(viewport_t *vport)
  375. {
  376.     backbuf_clear(vport->backbuf, vport->cols * vport->rows,
  377.         vport->attr.fg_color, vport->attr.bg_color);
  378.     vport_redraw(vport);
  379. }
  380.  
  381. /** Scroll viewport by the specified number of lines.
  382.  *
  383.  * @param vport Viewport to scroll
  384.  * @param lines Number of lines to scroll
  385.  *
  386.  */
  387. static void vport_scroll(viewport_t *vport, int lines)
  388. {
  389.     unsigned int row, col;
  390.     unsigned int x, y;
  391.     uint32_t glyph;
  392.     uint32_t fg_color;
  393.     uint32_t bg_color;
  394.     bb_cell_t *bbp, *xbp;
  395.  
  396.     /*
  397.      * Redraw.
  398.      */
  399.  
  400.     y = vport->y;
  401.     for (row = 0; row < vport->rows; row++) {
  402.         x = vport->x;
  403.         for (col = 0; col < vport->cols; col++) {
  404.             if ((row + lines >= 0) && (row + lines < vport->rows)) {
  405.                 xbp = &vport->backbuf[BB_POS(vport, col, row + lines)];
  406.                 bbp = &vport->backbuf[BB_POS(vport, col, row)];
  407.  
  408.                 glyph = xbp->glyph;
  409.                 fg_color = xbp->fg_color;
  410.                 bg_color = xbp->bg_color;
  411.  
  412.                 if (bbp->glyph == glyph &&
  413.                     bbp->fg_color == xbp->fg_color &&
  414.                     bbp->bg_color == xbp->bg_color) {
  415.                     x += FONT_WIDTH;
  416.                     continue;
  417.                 }
  418.             } else {
  419.                 glyph = 0;
  420.                 fg_color = vport->attr.fg_color;
  421.                 bg_color = vport->attr.bg_color;
  422.             }
  423.  
  424.             (*vport->dglyph)(x, y, false, vport->glyphs, glyph,
  425.                 fg_color, bg_color);
  426.             x += FONT_WIDTH;
  427.         }
  428.         y += FONT_SCANLINES;
  429.     }
  430.  
  431.     /*
  432.      * Scroll backbuffer.
  433.      */
  434.  
  435.     if (lines > 0) {
  436.         memmove(vport->backbuf, vport->backbuf + vport->cols * lines,
  437.             vport->cols * (vport->rows - lines) * sizeof(bb_cell_t));
  438.         backbuf_clear(&vport->backbuf[BB_POS(vport, 0, vport->rows - lines)],
  439.             vport->cols * lines, vport->attr.fg_color, vport->attr.bg_color);
  440.     } else {
  441.         memmove(vport->backbuf - vport->cols * lines, vport->backbuf,
  442.             vport->cols * (vport->rows + lines) * sizeof(bb_cell_t));
  443.         backbuf_clear(vport->backbuf, - vport->cols * lines,
  444.             vport->attr.fg_color, vport->attr.bg_color);
  445.     }
  446. }
  447.  
  448. /** Render glyphs
  449.  *
  450.  * Convert glyphs from device independent font
  451.  * description to current visual representation.
  452.  *
  453.  * @param vport Viewport
  454.  *
  455.  */
  456. static void render_glyphs(viewport_t* vport)
  457. {
  458.     unsigned int glyph;
  459.    
  460.     for (glyph = 0; glyph < FONT_GLYPHS; glyph++) {
  461.         unsigned int y;
  462.        
  463.         for (y = 0; y < FONT_SCANLINES; y++) {
  464.             unsigned int x;
  465.            
  466.             for (x = 0; x < FONT_WIDTH; x++) {
  467.                 screen.rgb_conv(&vport->glyphs[GLYPH_POS(glyph, y, false) + x * screen.pixelbytes],
  468.                     (fb_font[glyph][y] & (1 << (7 - x)))
  469.                     ? 0xffffff : 0x000000);
  470.                
  471.                 screen.rgb_conv(&vport->glyphs[GLYPH_POS(glyph, y, true) + x * screen.pixelbytes],
  472.                     (fb_font[glyph][y] & (1 << (7 - x)))
  473.                     ? 0x000000 : 0xffffff);
  474.             }
  475.         }
  476.     }
  477.    
  478.     screen.rgb_conv(vport->bgpixel, vport->attr.bg_color);
  479. }
  480.  
  481.  
  482. /** Create new viewport
  483.  *
  484.  * @param x      Origin of the viewport (x).
  485.  * @param y      Origin of the viewport (y).
  486.  * @param width  Width of the viewport.
  487.  * @param height Height of the viewport.
  488.  *
  489.  * @return New viewport number.
  490.  *
  491.  */
  492. static int vport_create(unsigned int x, unsigned int y,
  493.     unsigned int width, unsigned int height)
  494. {
  495.     unsigned int i;
  496.    
  497.     for (i = 0; i < MAX_VIEWPORTS; i++) {
  498.         if (!viewports[i].initialized)
  499.             break;
  500.     }
  501.     if (i == MAX_VIEWPORTS)
  502.         return ELIMIT;
  503.    
  504.     unsigned int cols = width / FONT_WIDTH;
  505.     unsigned int rows = height / FONT_SCANLINES;
  506.     unsigned int bbsize = cols * rows * sizeof(bb_cell_t);
  507.     unsigned int glyphsize = 2 * FONT_GLYPHS * screen.glyphbytes;
  508.     unsigned int word_size = sizeof(unsigned long);
  509.    
  510.     bb_cell_t *backbuf = (bb_cell_t *) malloc(bbsize);
  511.     if (!backbuf)
  512.         return ENOMEM;
  513.    
  514.     uint8_t *glyphs = (uint8_t *) malloc(glyphsize);
  515.     if (!glyphs) {
  516.         free(backbuf);
  517.         return ENOMEM;
  518.     }
  519.    
  520.     uint8_t *bgpixel = (uint8_t *) malloc(screen.pixelbytes);
  521.     if (!bgpixel) {
  522.         free(glyphs);
  523.         free(backbuf);
  524.         return ENOMEM;
  525.     }
  526.  
  527.     backbuf_clear(backbuf, cols * rows, DEFAULT_FGCOLOR, DEFAULT_BGCOLOR);
  528.     memset(glyphs, 0, glyphsize);
  529.     memset(bgpixel, 0, screen.pixelbytes);
  530.    
  531.     viewports[i].x = x;
  532.     viewports[i].y = y;
  533.     viewports[i].width = width;
  534.     viewports[i].height = height;
  535.    
  536.     viewports[i].cols = cols;
  537.     viewports[i].rows = rows;
  538.    
  539.     viewports[i].attr.bg_color = DEFAULT_BGCOLOR;
  540.     viewports[i].attr.fg_color = DEFAULT_FGCOLOR;
  541.    
  542.     viewports[i].glyphs = glyphs;
  543.     viewports[i].bgpixel = bgpixel;
  544.  
  545.     /*
  546.      * Conditions necessary  to select aligned version:
  547.      *
  548.      *   - word size is divisible by pixelbytes
  549.      *   - cell scanline size is divisible by word size
  550.      *   - cell scanlines are word-aligned
  551.      */
  552.     if ((word_size % screen.pixelbytes) == 0 &&
  553.         (FONT_WIDTH * screen.pixelbytes) % word_size == 0 &&
  554.         (x * screen.pixelbytes) % word_size == 0 &&
  555.         screen.scanline % word_size == 0) {
  556.  
  557.         viewports[i].dglyph = draw_glyph_aligned;
  558.     } else {
  559.         viewports[i].dglyph = draw_glyph_fallback;
  560.     }
  561.  
  562.     viewports[i].cur_col = 0;
  563.     viewports[i].cur_row = 0;
  564.     viewports[i].cursor_active = false;
  565.     viewports[i].cursor_shown = false;
  566.    
  567.     viewports[i].bbsize = bbsize;
  568.     viewports[i].backbuf = backbuf;
  569.    
  570.     viewports[i].initialized = true;
  571.    
  572.     render_glyphs(&viewports[i]);
  573.    
  574.     return i;
  575. }
  576.  
  577.  
  578. /** Initialize framebuffer as a chardev output device
  579.  *
  580.  * @param addr   Address of the framebuffer
  581.  * @param xres   Screen width in pixels
  582.  * @param yres   Screen height in pixels
  583.  * @param visual Bits per pixel (8, 16, 24, 32)
  584.  * @param scan   Bytes per one scanline
  585.  *
  586.  */
  587. static bool screen_init(void *addr, unsigned int xres, unsigned int yres,
  588.     unsigned int scan, unsigned int visual)
  589. {
  590.     switch (visual) {
  591.     case VISUAL_INDIRECT_8:
  592.         screen.rgb_conv = rgb_323;
  593.         screen.pixelbytes = 1;
  594.         break;
  595.     case VISUAL_RGB_5_5_5:
  596.         screen.rgb_conv = rgb_555;
  597.         screen.pixelbytes = 2;
  598.         break;
  599.     case VISUAL_RGB_5_6_5:
  600.         screen.rgb_conv = rgb_565;
  601.         screen.pixelbytes = 2;
  602.         break;
  603.     case VISUAL_RGB_8_8_8:
  604.         screen.rgb_conv = rgb_888;
  605.         screen.pixelbytes = 3;
  606.         break;
  607.     case VISUAL_BGR_8_8_8:
  608.         screen.rgb_conv = bgr_888;
  609.         screen.pixelbytes = 3;
  610.         break;
  611.     case VISUAL_RGB_8_8_8_0:
  612.         screen.rgb_conv = rgb_888;
  613.         screen.pixelbytes = 4;
  614.         break;
  615.     case VISUAL_RGB_0_8_8_8:
  616.         screen.rgb_conv = rgb_0888;
  617.         screen.pixelbytes = 4;
  618.         break;
  619.     case VISUAL_BGR_0_8_8_8:
  620.         screen.rgb_conv = bgr_0888;
  621.         screen.pixelbytes = 4;
  622.         break;
  623.     default:
  624.         return false;
  625.     }
  626.  
  627.     screen.fb_addr = (unsigned char *) addr;
  628.     screen.xres = xres;
  629.     screen.yres = yres;
  630.     screen.scanline = scan;
  631.    
  632.     screen.glyphscanline = FONT_WIDTH * screen.pixelbytes;
  633.     screen.glyphbytes = screen.glyphscanline * FONT_SCANLINES;
  634.    
  635.     /* Create first viewport */
  636.     vport_create(0, 0, xres, yres);
  637.    
  638.     return true;
  639. }
  640.  
  641.  
  642. /** Draw a glyph, takes advantage of alignment.
  643.  *
  644.  * This version can only be used if the following conditions are met:
  645.  *
  646.  *   - word size is divisible by pixelbytes
  647.  *   - cell scanline size is divisible by word size
  648.  *   - cell scanlines are word-aligned
  649.  *
  650.  * It makes use of the pre-rendered mask to process (possibly) several
  651.  * pixels at once (word size / pixelbytes pixels at a time are processed)
  652.  * making it very fast. Most notably this version is not applicable at 24 bits
  653.  * per pixel.
  654.  *
  655.  * @param x     x coordinate of top-left corner on screen.
  656.  * @param y     y coordinate of top-left corner on screen.
  657.  * @param cursor    Draw glyph with cursor
  658.  * @param glyphs    Pointer to font bitmap.
  659.  * @param glyph     Code of the glyph to draw.
  660.  * @param fg_color  Foreground color.
  661.  * @param bg_color  Backgroudn color.
  662.  */
  663. static void draw_glyph_aligned(unsigned int x, unsigned int y, bool cursor,
  664.     uint8_t *glyphs, uint32_t glyph, uint32_t fg_color, uint32_t bg_color)
  665. {
  666.     unsigned int i, yd;
  667.     unsigned long fg_buf, bg_buf;
  668.     unsigned long *maskp, *dp;
  669.     unsigned long mask;
  670.     unsigned int ww, d_add;
  671.  
  672.     /*
  673.      * Prepare a pair of words, one filled with foreground-color
  674.      * pattern and the other filled with background-color pattern.
  675.      */
  676.     for (i = 0; i < sizeof(unsigned long) / screen.pixelbytes; i++) {
  677.         screen.rgb_conv(&((uint8_t *)&fg_buf)[i * screen.pixelbytes],
  678.             fg_color);
  679.         screen.rgb_conv(&((uint8_t *)&bg_buf)[i * screen.pixelbytes],
  680.             bg_color);
  681.     }
  682.  
  683.     /* Pointer to the current position in the mask. */
  684.     maskp = (unsigned long *) &glyphs[GLYPH_POS(glyph, 0, cursor)];
  685.  
  686.     /* Pointer to the current position on the screen. */
  687.     dp = (unsigned long *) &screen.fb_addr[FB_POS(x, y)];
  688.  
  689.     /* Width of the character cell in words. */
  690.     ww = FONT_WIDTH * screen.pixelbytes / sizeof(unsigned long);
  691.  
  692.     /* Offset to add when moving to another screen scanline. */
  693.     d_add = screen.scanline - FONT_WIDTH * screen.pixelbytes;
  694.  
  695.     for (yd = 0; yd < FONT_SCANLINES; yd++) {
  696.         /*
  697.          * Now process the cell scanline, combining foreground
  698.          * and background color patters using the pre-rendered mask.
  699.          */
  700.         for (i = 0; i < ww; i++) {
  701.             mask = *maskp++;
  702.             *dp++ = (fg_buf & mask) | (bg_buf & ~mask);
  703.         }
  704.  
  705.         /* Move to the beginning of the next scanline of the cell. */
  706.         dp = (unsigned long *) ((uint8_t *) dp + d_add);
  707.     }
  708. }
  709.  
  710. /** Draw a glyph, fallback version.
  711.  *
  712.  * This version does not make use of the pre-rendered mask, it uses
  713.  * the font bitmap directly. It works always, but it is slower.
  714.  *
  715.  * @param x     x coordinate of top-left corner on screen.
  716.  * @param y     y coordinate of top-left corner on screen.
  717.  * @param cursor    Draw glyph with cursor
  718.  * @param glyphs    Pointer to font bitmap.
  719.  * @param glyph     Code of the glyph to draw.
  720.  * @param fg_color  Foreground color.
  721.  * @param bg_color  Backgroudn color.
  722.  */
  723. void draw_glyph_fallback(unsigned int x, unsigned int y, bool cursor,
  724.     uint8_t *glyphs, uint32_t glyph, uint32_t fg_color, uint32_t bg_color)
  725. {
  726.     unsigned int i, j, yd;
  727.     uint8_t fg_buf[4], bg_buf[4];
  728.     uint8_t *dp, *sp;
  729.     unsigned int d_add;
  730.     uint8_t b;
  731.  
  732.     /* Pre-render 1x the foreground and background color pixels. */
  733.     if (cursor) {
  734.         screen.rgb_conv(fg_buf, bg_color);
  735.         screen.rgb_conv(bg_buf, fg_color);
  736.     } else {
  737.         screen.rgb_conv(fg_buf, fg_color);
  738.         screen.rgb_conv(bg_buf, bg_color);
  739.     }
  740.  
  741.     /* Pointer to the current position on the screen. */
  742.     dp = (uint8_t *) &screen.fb_addr[FB_POS(x, y)];
  743.  
  744.     /* Offset to add when moving to another screen scanline. */
  745.     d_add = screen.scanline - FONT_WIDTH * screen.pixelbytes;
  746.  
  747.     for (yd = 0; yd < FONT_SCANLINES; yd++) {
  748.         /* Byte containing bits of the glyph scanline. */
  749.         b = fb_font[glyph][yd];
  750.  
  751.         for (i = 0; i < FONT_WIDTH; i++) {
  752.             /* Choose color based on the current bit. */
  753.             sp = (b & 0x80) ? fg_buf : bg_buf;
  754.  
  755.             /* Copy the pixel. */
  756.             for (j = 0; j < screen.pixelbytes; j++) {
  757.                 *dp++ = *sp++;
  758.             }
  759.  
  760.             /* Move to the next bit. */
  761.             b = b << 1;
  762.         }
  763.        
  764.         /* Move to the beginning of the next scanline of the cell. */
  765.         dp += d_add;
  766.     }
  767. }
  768.  
  769. /** Draw glyph at specified position in viewport.
  770.  *
  771.  * @param vport  Viewport identification
  772.  * @param cursor Draw glyph with cursor
  773.  * @param col    Screen position relative to viewport
  774.  * @param row    Screen position relative to viewport
  775.  *
  776.  */
  777. static void draw_vp_glyph(viewport_t *vport, bool cursor, unsigned int col,
  778.     unsigned int row)
  779. {
  780.     unsigned int x = vport->x + COL2X(col);
  781.     unsigned int y = vport->y + ROW2Y(row);
  782.  
  783.     uint32_t glyph;
  784.     uint32_t fg_color;
  785.     uint32_t bg_color;
  786.    
  787.     glyph = vport->backbuf[BB_POS(vport, col, row)].glyph;
  788.     fg_color = vport->backbuf[BB_POS(vport, col, row)].fg_color;
  789.     bg_color = vport->backbuf[BB_POS(vport, col, row)].bg_color;
  790.  
  791.     (*vport->dglyph)(x, y, cursor, vport->glyphs, glyph,
  792.         fg_color, bg_color);
  793. }
  794.  
  795. /** Hide cursor if it is shown
  796.  *
  797.  */
  798. static void cursor_hide(viewport_t *vport)
  799. {
  800.     if ((vport->cursor_active) && (vport->cursor_shown)) {
  801.         draw_vp_glyph(vport, false, vport->cur_col, vport->cur_row);
  802.         vport->cursor_shown = false;
  803.     }
  804. }
  805.  
  806.  
  807. /** Show cursor if cursor showing is enabled
  808.  *
  809.  */
  810. static void cursor_show(viewport_t *vport)
  811. {
  812.     /* Do not check for cursor_shown */
  813.     if (vport->cursor_active) {
  814.         draw_vp_glyph(vport, true, vport->cur_col, vport->cur_row);
  815.         vport->cursor_shown = true;
  816.     }
  817. }
  818.  
  819.  
  820. /** Invert cursor, if it is enabled
  821.  *
  822.  */
  823. static void cursor_blink(viewport_t *vport)
  824. {
  825.     if (vport->cursor_shown)
  826.         cursor_hide(vport);
  827.     else
  828.         cursor_show(vport);
  829. }
  830.  
  831.  
  832. /** Draw character at given position relative to viewport
  833.  *
  834.  * @param vport  Viewport identification
  835.  * @param c      Character to draw
  836.  * @param col    Screen position relative to viewport
  837.  * @param row    Screen position relative to viewport
  838.  *
  839.  */
  840. static void draw_char(viewport_t *vport, wchar_t c, unsigned int col, unsigned int row)
  841. {
  842.     bb_cell_t *bbp;
  843.  
  844.     /* Do not hide cursor if we are going to overwrite it */
  845.     if ((vport->cursor_active) && (vport->cursor_shown) &&
  846.         ((vport->cur_col != col) || (vport->cur_row != row)))
  847.         cursor_hide(vport);
  848.  
  849.     bbp = &vport->backbuf[BB_POS(vport, col, row)];
  850.     bbp->glyph = fb_font_glyph(c);
  851.     bbp->fg_color = vport->attr.fg_color;
  852.     bbp->bg_color = vport->attr.bg_color;
  853.  
  854.     draw_vp_glyph(vport, false, col, row);
  855.    
  856.     vport->cur_col = col;
  857.     vport->cur_row = row;
  858.    
  859.     vport->cur_col++;
  860.     if (vport->cur_col >= vport->cols) {
  861.         vport->cur_col = 0;
  862.         vport->cur_row++;
  863.         if (vport->cur_row >= vport->rows)
  864.             vport->cur_row--;
  865.     }
  866.    
  867.     cursor_show(vport);
  868. }
  869.  
  870. /** Draw text data to viewport.
  871.  *
  872.  * @param vport Viewport id
  873.  * @param data  Text data.
  874.  * @param x Leftmost column of the area.
  875.  * @param y Topmost row of the area.
  876.  * @param w Number of rows.
  877.  * @param h Number of columns.
  878.  */
  879. static void draw_text_data(viewport_t *vport, keyfield_t *data, unsigned int x,
  880.     unsigned int y, unsigned int w, unsigned int h)
  881. {
  882.     unsigned int i, j;
  883.     bb_cell_t *bbp;
  884.     attrs_t *a;
  885.     attr_rgb_t rgb;
  886.  
  887.     for (j = 0; j < h; j++) {
  888.         for (i = 0; i < w; i++) {
  889.             unsigned int col = x + i;
  890.             unsigned int row = y + j;
  891.  
  892.             bbp = &vport->backbuf[BB_POS(vport, col, row)];
  893.  
  894.             a = &data[j * w + i].attrs;
  895.             rgb_from_attr(&rgb, a);
  896.  
  897.             bbp->glyph = fb_font_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.         wchar_t ch;
  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.             ch = 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, ch, 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.