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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 <io/color.h>
  55. #include <io/style.h>
  56. #include <async.h>
  57. #include <fibril.h>
  58. #include <bool.h>
  59.  
  60. #include "font-8x16.h"
  61. #include "fb.h"
  62. #include "main.h"
  63. #include "../console/screenbuffer.h"
  64. #include "ppm.h"
  65.  
  66. #include "pointer.xbm"
  67. #include "pointer_mask.xbm"
  68.  
  69. #define DEFAULT_BGCOLOR  0xf0f0f0
  70. #define DEFAULT_FGCOLOR  0x000000
  71.  
  72. #define GLYPH_UNAVAIL    '?'
  73.  
  74. #define MAX_ANIM_LEN     8
  75. #define MAX_ANIMATIONS   4
  76. #define MAX_PIXMAPS      256  /**< Maximum number of saved pixmaps */
  77. #define MAX_VIEWPORTS    128  /**< Viewport is a rectangular area on the screen */
  78.  
  79. /** Function to render a pixel from a RGB value. */
  80. typedef void (*rgb_conv_t)(void *, uint32_t);
  81.  
  82. /** Function to render a bit mask. */
  83. typedef void (*mask_conv_t)(void *, bool);
  84.  
  85. /** Function to draw a glyph. */
  86. typedef void (*dg_t)(unsigned int x, unsigned int y, bool cursor,
  87.     uint8_t *glyphs, uint32_t glyph, uint32_t fg_color, uint32_t bg_color);
  88.  
  89. struct {
  90.     uint8_t *fb_addr;
  91.    
  92.     unsigned int xres;
  93.     unsigned int yres;
  94.    
  95.     unsigned int scanline;
  96.     unsigned int glyphscanline;
  97.    
  98.     unsigned int pixelbytes;
  99.     unsigned int glyphbytes;
  100.    
  101.     /** Pre-rendered mask for rendering glyphs. Specific for the visual. */
  102.     uint8_t *glyphs;
  103.    
  104.     rgb_conv_t rgb_conv;
  105.     mask_conv_t mask_conv;
  106. } screen;
  107.  
  108. /** Backbuffer character cell. */
  109. typedef struct {
  110.     uint32_t glyph;
  111.     uint32_t fg_color;
  112.     uint32_t bg_color;
  113. } bb_cell_t;
  114.  
  115. typedef struct {
  116.     bool initialized;
  117.     unsigned int x;
  118.     unsigned int y;
  119.     unsigned int width;
  120.     unsigned int height;
  121.    
  122.     /* Text support in window */
  123.     unsigned int cols;
  124.     unsigned int rows;
  125.    
  126.     /*
  127.      * Style and glyphs for text printing
  128.      */
  129.    
  130.     /** Current attributes. */
  131.     attr_rgb_t attr;
  132.    
  133.     uint8_t *bgpixel;
  134.    
  135.     /**
  136.      * Glyph drawing function for this viewport.  Different viewports
  137.      * might use different drawing functions depending on whether their
  138.      * scanlines are aligned on a word boundary.
  139.      */
  140.     dg_t dglyph;
  141.    
  142.     /* Auto-cursor position */
  143.     bool cursor_active;
  144.     unsigned int cur_col;
  145.     unsigned int cur_row;
  146.     bool cursor_shown;
  147.    
  148.     /* Back buffer */
  149.     bb_cell_t *backbuf;
  150.     unsigned int bbsize;
  151. } viewport_t;
  152.  
  153. typedef struct {
  154.     bool initialized;
  155.     bool enabled;
  156.     unsigned int vp;
  157.    
  158.     unsigned int pos;
  159.     unsigned int animlen;
  160.     unsigned int pixmaps[MAX_ANIM_LEN];
  161. } animation_t;
  162.  
  163. static animation_t animations[MAX_ANIMATIONS];
  164. static bool anims_enabled;
  165.  
  166. typedef struct {
  167.     unsigned int width;
  168.     unsigned int height;
  169.     uint8_t *data;
  170. } pixmap_t;
  171.  
  172. static pixmap_t pixmaps[MAX_PIXMAPS];
  173. static viewport_t viewports[128];
  174.  
  175. static bool client_connected = false;  /**< Allow only 1 connection */
  176.  
  177. static uint32_t color_table[16] = {
  178.     [COLOR_BLACK]       = 0x000000,
  179.     [COLOR_BLUE]        = 0x0000f0,
  180.     [COLOR_GREEN]       = 0x00f000,
  181.     [COLOR_CYAN]        = 0x00f0f0,
  182.     [COLOR_RED]         = 0xf00000,
  183.     [COLOR_MAGENTA]     = 0xf000f0,
  184.     [COLOR_YELLOW]      = 0xf0f000,
  185.     [COLOR_WHITE]       = 0xf0f0f0,
  186.    
  187.     [8 + COLOR_BLACK]   = 0x000000,
  188.     [8 + COLOR_BLUE]    = 0x0000ff,
  189.     [8 + COLOR_GREEN]   = 0x00ff00,
  190.     [8 + COLOR_CYAN]    = 0x00ffff,
  191.     [8 + COLOR_RED]     = 0xff0000,
  192.     [8 + COLOR_MAGENTA] = 0xff00ff,
  193.     [8 + COLOR_YELLOW]  = 0xffff00,
  194.     [8 + COLOR_WHITE]   = 0xffffff,
  195. };
  196.  
  197. static int rgb_from_attr(attr_rgb_t *rgb, const attrs_t *a);
  198. static int rgb_from_style(attr_rgb_t *rgb, int style);
  199. static int rgb_from_idx(attr_rgb_t *rgb, ipcarg_t fg_color,
  200.     ipcarg_t bg_color, ipcarg_t flags);
  201.  
  202. static int fb_set_color(viewport_t *vport, ipcarg_t fg_color,
  203.     ipcarg_t bg_color, ipcarg_t attr);
  204.  
  205. static void draw_glyph_aligned(unsigned int x, unsigned int y, bool cursor,
  206.     uint8_t *glyphs, uint32_t glyph, uint32_t fg_color, uint32_t bg_color);
  207. static void draw_glyph_fallback(unsigned int x, unsigned int y, bool cursor,
  208.     uint8_t *glyphs, uint32_t glyph, uint32_t fg_color, uint32_t bg_color);
  209.  
  210. static void draw_vp_glyph(viewport_t *vport, bool cursor, unsigned int col,
  211.     unsigned int row);
  212.  
  213.  
  214. #define RED(x, bits)                 ((x >> (8 + 8 + 8 - bits)) & ((1 << bits) - 1))
  215. #define GREEN(x, bits)               ((x >> (8 + 8 - bits)) & ((1 << bits) - 1))
  216. #define BLUE(x, bits)                ((x >> (8 - bits)) & ((1 << bits) - 1))
  217.  
  218. #define COL2X(col)                   ((col) * FONT_WIDTH)
  219. #define ROW2Y(row)                   ((row) * FONT_SCANLINES)
  220.  
  221. #define X2COL(x)                     ((x) / FONT_WIDTH)
  222. #define Y2ROW(y)                     ((y) / FONT_SCANLINES)
  223.  
  224. #define FB_POS(x, y)                 ((y) * screen.scanline + (x) * screen.pixelbytes)
  225. #define BB_POS(vport, col, row)      ((row) * vport->cols + (col))
  226. #define GLYPH_POS(glyph, y, cursor)  (((glyph) + (cursor) * FONT_GLYPHS) * screen.glyphbytes + (y) * screen.glyphscanline)
  227.  
  228.  
  229. /** ARGB 8:8:8:8 conversion
  230.  *
  231.  */
  232. static void rgb_0888(void *dst, uint32_t rgb)
  233. {
  234.     *((uint32_t *) dst) = rgb & 0x00ffffff;
  235. }
  236.  
  237. static void mask_0888(void *dst, bool mask)
  238. {
  239.     *((uint32_t *) dst) = (mask ? 0x00ffffff : 0);
  240. }
  241.  
  242.  
  243. /** ABGR 8:8:8:8 conversion
  244.  *
  245.  */
  246. static void bgr_0888(void *dst, uint32_t rgb)
  247. {
  248.     *((uint32_t *) dst)
  249.         = (BLUE(rgb, 8) << 16) | (GREEN(rgb, 8) << 8) | RED(rgb, 8);
  250. }
  251.  
  252.  
  253. /** RGB 8:8:8 conversion
  254.  *
  255.  */
  256. static void rgb_888(void *dst, uint32_t rgb)
  257. {
  258.     ((uint8_t *) dst)[0] = BLUE(rgb, 8);
  259.     ((uint8_t *) dst)[1] = GREEN(rgb, 8);
  260.     ((uint8_t *) dst)[2] = RED(rgb, 8);
  261. }
  262.  
  263. static void mask_888(void *dst, bool mask)
  264. {
  265.     if (mask) {
  266.         ((uint8_t *) dst)[0] = 0xff;
  267.         ((uint8_t *) dst)[1] = 0xff;
  268.         ((uint8_t *) dst)[2] = 0xff;
  269.     } else {
  270.         ((uint8_t *) dst)[0] = 0;
  271.         ((uint8_t *) dst)[1] = 0;
  272.         ((uint8_t *) dst)[2] = 0;
  273.     }
  274. }
  275.  
  276.  
  277. /** BGR 8:8:8 conversion
  278.  *
  279.  */
  280. static void bgr_888(void *dst, uint32_t rgb)
  281. {
  282.     ((uint8_t *) dst)[0] = RED(rgb, 8);
  283.     ((uint8_t *) dst)[1] = GREEN(rgb, 8);
  284.     ((uint8_t *) dst)[2] = BLUE(rgb, 8);
  285. }
  286.  
  287.  
  288. /** RGB 5:5:5 conversion
  289.  *
  290.  */
  291. static void rgb_555(void *dst, uint32_t rgb)
  292. {
  293.     *((uint16_t *) dst)
  294.         = (RED(rgb, 5) << 10) | (GREEN(rgb, 5) << 5) | BLUE(rgb, 5);
  295. }
  296.  
  297. static void mask_555(void *dst, bool mask)
  298. {
  299.     *((uint16_t *) dst) = (mask ? 0x7fff : 0);
  300. }
  301.  
  302.  
  303. /** RGB 5:6:5 conversion
  304.  *
  305.  */
  306. static void rgb_565(void *dst, uint32_t rgb)
  307. {
  308.     *((uint16_t *) dst)
  309.         = (RED(rgb, 5) << 11) | (GREEN(rgb, 6) << 5) | BLUE(rgb, 5);
  310. }
  311.  
  312. static void mask_565(void *dst, bool mask)
  313. {
  314.     *((uint16_t *) dst) = (mask ? 0xffff : 0);
  315. }
  316.  
  317.  
  318. /** RGB 3:2:3
  319.  *
  320.  */
  321. static void rgb_323(void *dst, uint32_t rgb)
  322. {
  323.     *((uint8_t *) dst)
  324.         = ~((RED(rgb, 3) << 5) | (GREEN(rgb, 2) << 3) | BLUE(rgb, 3));
  325. }
  326.  
  327. static void mask_323(void *dst, bool mask)
  328. {
  329.     *((uint8_t *) dst) = (mask ? 0xff : 0);
  330. }
  331.  
  332. /** Draw a filled rectangle.
  333.  *
  334.  * @note Need real implementation that does not access VRAM twice.
  335.  *
  336.  */
  337. static void draw_filled_rect(unsigned int x0, unsigned int y0, unsigned int x1,
  338.     unsigned int y1, uint32_t color)
  339. {
  340.     unsigned int x;
  341.     unsigned int y;
  342.     unsigned int copy_bytes;
  343.    
  344.     uint8_t *sp;
  345.     uint8_t *dp;
  346.     uint8_t cbuf[4];
  347.    
  348.     if ((y0 >= y1) || (x0 >= x1))
  349.         return;
  350.    
  351.     screen.rgb_conv(cbuf, color);
  352.    
  353.     sp = &screen.fb_addr[FB_POS(x0, y0)];
  354.     dp = sp;
  355.    
  356.     /* Draw the first line. */
  357.     for (x = x0; x < x1; x++) {
  358.         memcpy(dp, cbuf, screen.pixelbytes);
  359.         dp += screen.pixelbytes;
  360.     }
  361.    
  362.     dp = sp + screen.scanline;
  363.     copy_bytes = (x1 - x0) * screen.pixelbytes;
  364.    
  365.     /* Draw the remaining lines by copying. */
  366.     for (y = y0 + 1; y < y1; y++) {
  367.         memcpy(dp, sp, copy_bytes);
  368.         dp += screen.scanline;
  369.     }
  370. }
  371.  
  372. /** Redraw viewport.
  373.  *
  374.  * @param vport Viewport to redraw
  375.  *
  376.  */
  377. static void vport_redraw(viewport_t *vport)
  378. {
  379.     unsigned int col;
  380.     unsigned int row;
  381.    
  382.     for (row = 0; row < vport->rows; row++) {
  383.         for (col = 0; col < vport->cols; col++) {
  384.             draw_vp_glyph(vport, false, col, row);
  385.         }
  386.     }
  387.    
  388.     if (COL2X(vport->cols) < vport->width) {
  389.         draw_filled_rect(
  390.             vport->x + COL2X(vport->cols), vport->y,
  391.             vport->x + vport->width, vport->y + vport->height,
  392.             vport->attr.bg_color);
  393.     }
  394.    
  395.     if (ROW2Y(vport->rows) < vport->height) {
  396.         draw_filled_rect(
  397.             vport->x, vport->y + ROW2Y(vport->rows),
  398.             vport->x + vport->width, vport->y + vport->height,
  399.             vport->attr.bg_color);
  400.     }
  401. }
  402.  
  403. static void backbuf_clear(bb_cell_t *backbuf, size_t len, uint32_t fg_color,
  404.     uint32_t bg_color)
  405. {
  406.     size_t i;
  407.    
  408.     for (i = 0; i < len; i++) {
  409.         backbuf[i].glyph = 0;
  410.         backbuf[i].fg_color = fg_color;
  411.         backbuf[i].bg_color = bg_color;
  412.     }
  413. }
  414.  
  415. /** Clear viewport.
  416.  *
  417.  * @param vport Viewport to clear
  418.  *
  419.  */
  420. static void vport_clear(viewport_t *vport)
  421. {
  422.     backbuf_clear(vport->backbuf, vport->cols * vport->rows,
  423.         vport->attr.fg_color, vport->attr.bg_color);
  424.     vport_redraw(vport);
  425. }
  426.  
  427. /** Scroll viewport by the specified number of lines.
  428.  *
  429.  * @param vport Viewport to scroll
  430.  * @param lines Number of lines to scroll
  431.  *
  432.  */
  433. static void vport_scroll(viewport_t *vport, int lines)
  434. {
  435.     unsigned int col;
  436.     unsigned int row;
  437.     unsigned int x;
  438.     unsigned int y;
  439.     uint32_t glyph;
  440.     uint32_t fg_color;
  441.     uint32_t bg_color;
  442.     bb_cell_t *bbp;
  443.     bb_cell_t *xbp;
  444.    
  445.     /*
  446.      * Redraw.
  447.      */
  448.    
  449.     y = vport->y;
  450.     for (row = 0; row < vport->rows; row++) {
  451.         x = vport->x;
  452.         for (col = 0; col < vport->cols; col++) {
  453.             if (((int) row + lines >= 0) &&
  454.                 ((int) row + lines < (int) vport->rows)) {
  455.                 xbp = &vport->backbuf[BB_POS(vport, col, row + lines)];
  456.                 bbp = &vport->backbuf[BB_POS(vport, col, row)];
  457.                
  458.                 glyph = xbp->glyph;
  459.                 fg_color = xbp->fg_color;
  460.                 bg_color = xbp->bg_color;
  461.                
  462.                 if ((bbp->glyph == glyph)
  463.                    && (bbp->fg_color == xbp->fg_color)
  464.                    && (bbp->bg_color == xbp->bg_color)) {
  465.                     x += FONT_WIDTH;
  466.                     continue;
  467.                 }
  468.             } else {
  469.                 glyph = 0;
  470.                 fg_color = vport->attr.fg_color;
  471.                 bg_color = vport->attr.bg_color;
  472.             }
  473.            
  474.             (*vport->dglyph)(x, y, false, screen.glyphs, glyph,
  475.                 fg_color, bg_color);
  476.             x += FONT_WIDTH;
  477.         }
  478.         y += FONT_SCANLINES;
  479.     }
  480.    
  481.     /*
  482.      * Scroll backbuffer.
  483.      */
  484.    
  485.     if (lines > 0) {
  486.         memmove(vport->backbuf, vport->backbuf + vport->cols * lines,
  487.             vport->cols * (vport->rows - lines) * sizeof(bb_cell_t));
  488.         backbuf_clear(&vport->backbuf[BB_POS(vport, 0, vport->rows - lines)],
  489.             vport->cols * lines, vport->attr.fg_color, vport->attr.bg_color);
  490.     } else {
  491.         memmove(vport->backbuf - vport->cols * lines, vport->backbuf,
  492.             vport->cols * (vport->rows + lines) * sizeof(bb_cell_t));
  493.         backbuf_clear(vport->backbuf, - vport->cols * lines,
  494.             vport->attr.fg_color, vport->attr.bg_color);
  495.     }
  496. }
  497.  
  498. /** Render glyphs
  499.  *
  500.  * Convert glyphs from device independent font
  501.  * description to current visual representation.
  502.  *
  503.  */
  504. static void render_glyphs(void)
  505. {
  506.     unsigned int glyph;
  507.    
  508.     for (glyph = 0; glyph < FONT_GLYPHS; glyph++) {
  509.         unsigned int y;
  510.        
  511.         for (y = 0; y < FONT_SCANLINES; y++) {
  512.             unsigned int x;
  513.            
  514.             for (x = 0; x < FONT_WIDTH; x++) {
  515.                 screen.mask_conv(&screen.glyphs[GLYPH_POS(glyph, y, false) + x * screen.pixelbytes],
  516.                     (fb_font[glyph][y] & (1 << (7 - x))) ? true : false);
  517.                
  518.                 screen.mask_conv(&screen.glyphs[GLYPH_POS(glyph, y, true) + x * screen.pixelbytes],
  519.                     (fb_font[glyph][y] & (1 << (7 - x))) ? false : true);
  520.             }
  521.         }
  522.     }
  523. }
  524.  
  525. /** Create new viewport
  526.  *
  527.  * @param x      Origin of the viewport (x).
  528.  * @param y      Origin of the viewport (y).
  529.  * @param width  Width of the viewport.
  530.  * @param height Height of the viewport.
  531.  *
  532.  * @return New viewport number.
  533.  *
  534.  */
  535. static int vport_create(unsigned int x, unsigned int y,
  536.     unsigned int width, unsigned int height)
  537. {
  538.     unsigned int i;
  539.    
  540.     for (i = 0; i < MAX_VIEWPORTS; i++) {
  541.         if (!viewports[i].initialized)
  542.             break;
  543.     }
  544.    
  545.     if (i == MAX_VIEWPORTS)
  546.         return ELIMIT;
  547.    
  548.     unsigned int cols = width / FONT_WIDTH;
  549.     unsigned int rows = height / FONT_SCANLINES;
  550.     unsigned int bbsize = cols * rows * sizeof(bb_cell_t);
  551.     unsigned int word_size = sizeof(unsigned long);
  552.    
  553.     bb_cell_t *backbuf = (bb_cell_t *) malloc(bbsize);
  554.     if (!backbuf)
  555.         return ENOMEM;
  556.    
  557.     uint8_t *bgpixel = (uint8_t *) malloc(screen.pixelbytes);
  558.     if (!bgpixel) {
  559.         free(backbuf);
  560.         return ENOMEM;
  561.     }
  562.    
  563.     backbuf_clear(backbuf, cols * rows, DEFAULT_FGCOLOR, DEFAULT_BGCOLOR);
  564.     memset(bgpixel, 0, screen.pixelbytes);
  565.    
  566.     viewports[i].x = x;
  567.     viewports[i].y = y;
  568.     viewports[i].width = width;
  569.     viewports[i].height = height;
  570.    
  571.     viewports[i].cols = cols;
  572.     viewports[i].rows = rows;
  573.    
  574.     viewports[i].attr.bg_color = DEFAULT_BGCOLOR;
  575.     viewports[i].attr.fg_color = DEFAULT_FGCOLOR;
  576.    
  577.     viewports[i].bgpixel = bgpixel;
  578.    
  579.     /*
  580.      * Conditions necessary to select aligned version:
  581.      *  - word size is divisible by pixelbytes
  582.      *  - cell scanline size is divisible by word size
  583.      *  - cell scanlines are word-aligned
  584.      *
  585.      */
  586.     if (((word_size % screen.pixelbytes) == 0)
  587.         && ((FONT_WIDTH * screen.pixelbytes) % word_size == 0)
  588.         && ((x * screen.pixelbytes) % word_size == 0)
  589.         && (screen.scanline % word_size == 0)) {
  590.         viewports[i].dglyph = draw_glyph_aligned;
  591.     } else {
  592.         viewports[i].dglyph = draw_glyph_fallback;
  593.     }
  594.    
  595.     viewports[i].cur_col = 0;
  596.     viewports[i].cur_row = 0;
  597.     viewports[i].cursor_active = false;
  598.     viewports[i].cursor_shown = false;
  599.    
  600.     viewports[i].bbsize = bbsize;
  601.     viewports[i].backbuf = backbuf;
  602.    
  603.     viewports[i].initialized = true;
  604.    
  605.     screen.rgb_conv(viewports[i].bgpixel, viewports[i].attr.bg_color);
  606.    
  607.     return i;
  608. }
  609.  
  610.  
  611. /** Initialize framebuffer as a chardev output device
  612.  *
  613.  * @param addr   Address of the framebuffer
  614.  * @param xres   Screen width in pixels
  615.  * @param yres   Screen height in pixels
  616.  * @param visual Bits per pixel (8, 16, 24, 32)
  617.  * @param scan   Bytes per one scanline
  618.  *
  619.  */
  620. static bool screen_init(void *addr, unsigned int xres, unsigned int yres,
  621.     unsigned int scan, unsigned int visual)
  622. {
  623.    
  624.    
  625.     switch (visual) {
  626.     case VISUAL_INDIRECT_8:
  627.         screen.rgb_conv = rgb_323;
  628.         screen.mask_conv = mask_323;
  629.         screen.pixelbytes = 1;
  630.         break;
  631.     case VISUAL_RGB_5_5_5:
  632.         screen.rgb_conv = rgb_555;
  633.         screen.mask_conv = mask_555;
  634.         screen.pixelbytes = 2;
  635.         break;
  636.     case VISUAL_RGB_5_6_5:
  637.         screen.rgb_conv = rgb_565;
  638.         screen.mask_conv = mask_565;
  639.         screen.pixelbytes = 2;
  640.         break;
  641.     case VISUAL_RGB_8_8_8:
  642.         screen.rgb_conv = rgb_888;
  643.         screen.mask_conv = mask_888;
  644.         screen.pixelbytes = 3;
  645.         break;
  646.     case VISUAL_BGR_8_8_8:
  647.         screen.rgb_conv = bgr_888;
  648.         screen.mask_conv = mask_888;
  649.         screen.pixelbytes = 3;
  650.         break;
  651.     case VISUAL_RGB_8_8_8_0:
  652.         screen.rgb_conv = rgb_888;
  653.         screen.mask_conv = mask_888;
  654.         screen.pixelbytes = 4;
  655.         break;
  656.     case VISUAL_RGB_0_8_8_8:
  657.         screen.rgb_conv = rgb_0888;
  658.         screen.mask_conv = mask_0888;
  659.         screen.pixelbytes = 4;
  660.         break;
  661.     case VISUAL_BGR_0_8_8_8:
  662.         screen.rgb_conv = bgr_0888;
  663.         screen.mask_conv = mask_0888;
  664.         screen.pixelbytes = 4;
  665.         break;
  666.     default:
  667.         return false;
  668.     }
  669.    
  670.     screen.fb_addr = (unsigned char *) addr;
  671.     screen.xres = xres;
  672.     screen.yres = yres;
  673.     screen.scanline = scan;
  674.    
  675.     screen.glyphscanline = FONT_WIDTH * screen.pixelbytes;
  676.     screen.glyphbytes = screen.glyphscanline * FONT_SCANLINES;
  677.    
  678.     size_t glyphsize = 2 * FONT_GLYPHS * screen.glyphbytes;
  679.     uint8_t *glyphs = (uint8_t *) malloc(glyphsize);
  680.     if (!glyphs)
  681.         return false;
  682.    
  683.     memset(glyphs, 0, glyphsize);
  684.     screen.glyphs = glyphs;
  685.    
  686.     render_glyphs();
  687.    
  688.     /* Create first viewport */
  689.     vport_create(0, 0, xres, yres);
  690.    
  691.     return true;
  692. }
  693.  
  694.  
  695. /** Draw a glyph, takes advantage of alignment.
  696.  *
  697.  * This version can only be used if the following conditions are met:
  698.  *
  699.  *   - word size is divisible by pixelbytes
  700.  *   - cell scanline size is divisible by word size
  701.  *   - cell scanlines are word-aligned
  702.  *
  703.  * It makes use of the pre-rendered mask to process (possibly) several
  704.  * pixels at once (word size / pixelbytes pixels at a time are processed)
  705.  * making it very fast. Most notably this version is not applicable at 24 bits
  706.  * per pixel.
  707.  *
  708.  * @param x        x coordinate of top-left corner on screen.
  709.  * @param y        y coordinate of top-left corner on screen.
  710.  * @param cursor   Draw glyph with cursor
  711.  * @param glyphs   Pointer to font bitmap.
  712.  * @param glyph    Code of the glyph to draw.
  713.  * @param fg_color Foreground color.
  714.  * @param bg_color Backgroudn color.
  715.  *
  716.  */
  717. static void draw_glyph_aligned(unsigned int x, unsigned int y, bool cursor,
  718.     uint8_t *glyphs, uint32_t glyph, uint32_t fg_color, uint32_t bg_color)
  719. {
  720.     unsigned int i;
  721.     unsigned int yd;
  722.     unsigned long fg_buf;
  723.     unsigned long bg_buf;
  724.     unsigned long mask;
  725.    
  726.     /*
  727.      * Prepare a pair of words, one filled with foreground-color
  728.      * pattern and the other filled with background-color pattern.
  729.      */
  730.     for (i = 0; i < sizeof(unsigned long) / screen.pixelbytes; i++) {
  731.         screen.rgb_conv(&((uint8_t *) &fg_buf)[i * screen.pixelbytes],
  732.             fg_color);
  733.         screen.rgb_conv(&((uint8_t *) &bg_buf)[i * screen.pixelbytes],
  734.             bg_color);
  735.     }
  736.    
  737.     /* Pointer to the current position in the mask. */
  738.     unsigned long *maskp = (unsigned long *) &glyphs[GLYPH_POS(glyph, 0, cursor)];
  739.    
  740.     /* Pointer to the current position on the screen. */
  741.     unsigned long *dp = (unsigned long *) &screen.fb_addr[FB_POS(x, y)];
  742.    
  743.     /* Width of the character cell in words. */
  744.     unsigned int ww = FONT_WIDTH * screen.pixelbytes / sizeof(unsigned long);
  745.    
  746.     /* Offset to add when moving to another screen scanline. */
  747.     unsigned int d_add = screen.scanline - FONT_WIDTH * screen.pixelbytes;
  748.    
  749.     for (yd = 0; yd < FONT_SCANLINES; yd++) {
  750.         /*
  751.          * Now process the cell scanline, combining foreground
  752.          * and background color patters using the pre-rendered mask.
  753.          */
  754.         for (i = 0; i < ww; i++) {
  755.             mask = *maskp++;
  756.             *dp++ = (fg_buf & mask) | (bg_buf & ~mask);
  757.         }
  758.        
  759.         /* Move to the beginning of the next scanline of the cell. */
  760.         dp = (unsigned long *) ((uint8_t *) dp + d_add);
  761.     }
  762. }
  763.  
  764. /** Draw a glyph, fallback version.
  765.  *
  766.  * This version does not make use of the pre-rendered mask, it uses
  767.  * the font bitmap directly. It works always, but it is slower.
  768.  *
  769.  * @param x        x coordinate of top-left corner on screen.
  770.  * @param y        y coordinate of top-left corner on screen.
  771.  * @param cursor   Draw glyph with cursor
  772.  * @param glyphs   Pointer to font bitmap.
  773.  * @param glyph    Code of the glyph to draw.
  774.  * @param fg_color Foreground color.
  775.  * @param bg_color Backgroudn color.
  776.  *
  777.  */
  778. void draw_glyph_fallback(unsigned int x, unsigned int y, bool cursor,
  779.     uint8_t *glyphs, uint32_t glyph, uint32_t fg_color, uint32_t bg_color)
  780. {
  781.     unsigned int i;
  782.     unsigned int j;
  783.     unsigned int yd;
  784.     uint8_t fg_buf[4];
  785.     uint8_t bg_buf[4];
  786.     uint8_t *sp;
  787.     uint8_t b;
  788.    
  789.     /* Pre-render 1x the foreground and background color pixels. */
  790.     if (cursor) {
  791.         screen.rgb_conv(fg_buf, bg_color);
  792.         screen.rgb_conv(bg_buf, fg_color);
  793.     } else {
  794.         screen.rgb_conv(fg_buf, fg_color);
  795.         screen.rgb_conv(bg_buf, bg_color);
  796.     }
  797.    
  798.     /* Pointer to the current position on the screen. */
  799.     uint8_t *dp = (uint8_t *) &screen.fb_addr[FB_POS(x, y)];
  800.    
  801.     /* Offset to add when moving to another screen scanline. */
  802.     unsigned int d_add = screen.scanline - FONT_WIDTH * screen.pixelbytes;
  803.    
  804.     for (yd = 0; yd < FONT_SCANLINES; yd++) {
  805.         /* Byte containing bits of the glyph scanline. */
  806.         b = fb_font[glyph][yd];
  807.        
  808.         for (i = 0; i < FONT_WIDTH; i++) {
  809.             /* Choose color based on the current bit. */
  810.             sp = (b & 0x80) ? fg_buf : bg_buf;
  811.            
  812.             /* Copy the pixel. */
  813.             for (j = 0; j < screen.pixelbytes; j++) {
  814.                 *dp++ = *sp++;
  815.             }
  816.            
  817.             /* Move to the next bit. */
  818.             b = b << 1;
  819.         }
  820.        
  821.         /* Move to the beginning of the next scanline of the cell. */
  822.         dp += d_add;
  823.     }
  824. }
  825.  
  826. /** Draw glyph at specified position in viewport.
  827.  *
  828.  * @param vport  Viewport identification
  829.  * @param cursor Draw glyph with cursor
  830.  * @param col    Screen position relative to viewport
  831.  * @param row    Screen position relative to viewport
  832.  *
  833.  */
  834. static void draw_vp_glyph(viewport_t *vport, bool cursor, unsigned int col,
  835.     unsigned int row)
  836. {
  837.     unsigned int x = vport->x + COL2X(col);
  838.     unsigned int y = vport->y + ROW2Y(row);
  839.    
  840.     uint32_t glyph = vport->backbuf[BB_POS(vport, col, row)].glyph;
  841.     uint32_t fg_color = vport->backbuf[BB_POS(vport, col, row)].fg_color;
  842.     uint32_t bg_color = vport->backbuf[BB_POS(vport, col, row)].bg_color;
  843.    
  844.     (*vport->dglyph)(x, y, cursor, screen.glyphs, glyph,
  845.         fg_color, bg_color);
  846. }
  847.  
  848. /** Hide cursor if it is shown
  849.  *
  850.  */
  851. static void cursor_hide(viewport_t *vport)
  852. {
  853.     if ((vport->cursor_active) && (vport->cursor_shown)) {
  854.         draw_vp_glyph(vport, false, vport->cur_col, vport->cur_row);
  855.         vport->cursor_shown = false;
  856.     }
  857. }
  858.  
  859.  
  860. /** Show cursor if cursor showing is enabled
  861.  *
  862.  */
  863. static void cursor_show(viewport_t *vport)
  864. {
  865.     /* Do not check for cursor_shown */
  866.     if (vport->cursor_active) {
  867.         draw_vp_glyph(vport, true, vport->cur_col, vport->cur_row);
  868.         vport->cursor_shown = true;
  869.     }
  870. }
  871.  
  872.  
  873. /** Invert cursor, if it is enabled
  874.  *
  875.  */
  876. static void cursor_blink(viewport_t *vport)
  877. {
  878.     if (vport->cursor_shown)
  879.         cursor_hide(vport);
  880.     else
  881.         cursor_show(vport);
  882. }
  883.  
  884.  
  885. /** Draw character at given position relative to viewport
  886.  *
  887.  * @param vport  Viewport identification
  888.  * @param c      Character to draw
  889.  * @param col    Screen position relative to viewport
  890.  * @param row    Screen position relative to viewport
  891.  *
  892.  */
  893. static void draw_char(viewport_t *vport, wchar_t c, unsigned int col, unsigned int row)
  894. {
  895.     bb_cell_t *bbp;
  896.    
  897.     /* Do not hide cursor if we are going to overwrite it */
  898.     if ((vport->cursor_active) && (vport->cursor_shown) &&
  899.         ((vport->cur_col != col) || (vport->cur_row != row)))
  900.         cursor_hide(vport);
  901.    
  902.     bbp = &vport->backbuf[BB_POS(vport, col, row)];
  903.     bbp->glyph = fb_font_glyph(c);
  904.     bbp->fg_color = vport->attr.fg_color;
  905.     bbp->bg_color = vport->attr.bg_color;
  906.    
  907.     draw_vp_glyph(vport, false, col, row);
  908.    
  909.     vport->cur_col = col;
  910.     vport->cur_row = row;
  911.    
  912.     vport->cur_col++;
  913.     if (vport->cur_col >= vport->cols) {
  914.         vport->cur_col = 0;
  915.         vport->cur_row++;
  916.         if (vport->cur_row >= vport->rows)
  917.             vport->cur_row--;
  918.     }
  919.    
  920.     cursor_show(vport);
  921. }
  922.  
  923. /** Draw text data to viewport.
  924.  *
  925.  * @param vport Viewport id
  926.  * @param data  Text data.
  927.  * @param x     Leftmost column of the area.
  928.  * @param y     Topmost row of the area.
  929.  * @param w     Number of rows.
  930.  * @param h     Number of columns.
  931.  *
  932.  */
  933. static void draw_text_data(viewport_t *vport, keyfield_t *data, unsigned int x,
  934.     unsigned int y, unsigned int w, unsigned int h)
  935. {
  936.     unsigned int i;
  937.     unsigned int j;
  938.     bb_cell_t *bbp;
  939.     attrs_t *a;
  940.     attr_rgb_t rgb;
  941.    
  942.     for (j = 0; j < h; j++) {
  943.         for (i = 0; i < w; i++) {
  944.             unsigned int col = x + i;
  945.             unsigned int row = y + j;
  946.            
  947.             bbp = &vport->backbuf[BB_POS(vport, col, row)];
  948.            
  949.             a = &data[j * w + i].attrs;
  950.             rgb_from_attr(&rgb, a);
  951.            
  952.             bbp->glyph = fb_font_glyph(data[j * w + i].character);
  953.             bbp->fg_color = rgb.fg_color;
  954.             bbp->bg_color = rgb.bg_color;
  955.            
  956.             draw_vp_glyph(vport, false, col, row);
  957.         }
  958.     }
  959.     cursor_show(vport);
  960. }
  961.  
  962.  
  963. static void putpixel_pixmap(void *data, unsigned int x, unsigned int y, uint32_t color)
  964. {
  965.     int pm = *((int *) data);
  966.     pixmap_t *pmap = &pixmaps[pm];
  967.     unsigned int pos = (y * pmap->width + x) * screen.pixelbytes;
  968.    
  969.     screen.rgb_conv(&pmap->data[pos], color);
  970. }
  971.  
  972.  
  973. static void putpixel(void *data, unsigned int x, unsigned int y, uint32_t color)
  974. {
  975.     viewport_t *vport = (viewport_t *) data;
  976.     unsigned int dx = vport->x + x;
  977.     unsigned int dy = vport->y + y;
  978.    
  979.     screen.rgb_conv(&screen.fb_addr[FB_POS(dx, dy)], color);
  980. }
  981.  
  982.  
  983. /** Return first free pixmap
  984.  *
  985.  */
  986. static int find_free_pixmap(void)
  987. {
  988.     unsigned int i;
  989.    
  990.     for (i = 0; i < MAX_PIXMAPS; i++)
  991.         if (!pixmaps[i].data)
  992.             return i;
  993.    
  994.     return -1;
  995. }
  996.  
  997.  
  998. /** Create a new pixmap and return appropriate ID
  999.  *
  1000.  */
  1001. static int shm2pixmap(unsigned char *shm, size_t size)
  1002. {
  1003.     int pm;
  1004.     pixmap_t *pmap;
  1005.    
  1006.     pm = find_free_pixmap();
  1007.     if (pm == -1)
  1008.         return ELIMIT;
  1009.    
  1010.     pmap = &pixmaps[pm];
  1011.    
  1012.     if (ppm_get_data(shm, size, &pmap->width, &pmap->height))
  1013.         return EINVAL;
  1014.    
  1015.     pmap->data = malloc(pmap->width * pmap->height * screen.pixelbytes);
  1016.     if (!pmap->data)
  1017.         return ENOMEM;
  1018.    
  1019.     ppm_draw(shm, size, 0, 0, pmap->width, pmap->height, putpixel_pixmap, (void *) &pm);
  1020.    
  1021.     return pm;
  1022. }
  1023.  
  1024.  
  1025. /** Handle shared memory communication calls
  1026.  *
  1027.  * Protocol for drawing pixmaps:
  1028.  * - FB_PREPARE_SHM(client shm identification)
  1029.  * - IPC_M_AS_AREA_SEND
  1030.  * - FB_DRAW_PPM(startx, starty)
  1031.  * - FB_DROP_SHM
  1032.  *
  1033.  * Protocol for text drawing
  1034.  * - IPC_M_AS_AREA_SEND
  1035.  * - FB_DRAW_TEXT_DATA
  1036.  *
  1037.  * @param callid Callid of the current call
  1038.  * @param call   Current call data
  1039.  * @param vp     Active viewport
  1040.  *
  1041.  * @return false if the call was not handled byt this function, true otherwise
  1042.  *
  1043.  * Note: this function is not thread-safe, you would have
  1044.  * to redefine static variables with fibril_local.
  1045.  *
  1046.  */
  1047. static bool shm_handle(ipc_callid_t callid, ipc_call_t *call, int vp)
  1048. {
  1049.     static keyfield_t *interbuffer = NULL;
  1050.     static size_t intersize = 0;
  1051.    
  1052.     static unsigned char *shm = NULL;
  1053.     static ipcarg_t shm_id = 0;
  1054.     static size_t shm_size;
  1055.    
  1056.     bool handled = true;
  1057.     int retval = EOK;
  1058.     viewport_t *vport = &viewports[vp];
  1059.     unsigned int x;
  1060.     unsigned int y;
  1061.     unsigned int w;
  1062.     unsigned int h;
  1063.    
  1064.     switch (IPC_GET_METHOD(*call)) {
  1065.     case IPC_M_SHARE_OUT:
  1066.         /* We accept one area for data interchange */
  1067.         if (IPC_GET_ARG1(*call) == shm_id) {
  1068.             void *dest = as_get_mappable_page(IPC_GET_ARG2(*call));
  1069.             shm_size = IPC_GET_ARG2(*call);
  1070.             if (!ipc_answer_1(callid, EOK, (sysarg_t) dest))
  1071.                 shm = dest;
  1072.             else
  1073.                 shm_id = 0;
  1074.            
  1075.             if (shm[0] != 'P')
  1076.                 return false;
  1077.            
  1078.             return true;
  1079.         } else {
  1080.             intersize = IPC_GET_ARG2(*call);
  1081.             receive_comm_area(callid, call, (void *) &interbuffer);
  1082.         }
  1083.         return true;
  1084.     case FB_PREPARE_SHM:
  1085.         if (shm_id)
  1086.             retval = EBUSY;
  1087.         else
  1088.             shm_id = IPC_GET_ARG1(*call);
  1089.         break;
  1090.        
  1091.     case FB_DROP_SHM:
  1092.         if (shm) {
  1093.             as_area_destroy(shm);
  1094.             shm = NULL;
  1095.         }
  1096.         shm_id = 0;
  1097.         break;
  1098.        
  1099.     case FB_SHM2PIXMAP:
  1100.         if (!shm) {
  1101.             retval = EINVAL;
  1102.             break;
  1103.         }
  1104.         retval = shm2pixmap(shm, shm_size);
  1105.         break;
  1106.     case FB_DRAW_PPM:
  1107.         if (!shm) {
  1108.             retval = EINVAL;
  1109.             break;
  1110.         }
  1111.         x = IPC_GET_ARG1(*call);
  1112.         y = IPC_GET_ARG2(*call);
  1113.        
  1114.         if ((x > vport->width) || (y > vport->height)) {
  1115.             retval = EINVAL;
  1116.             break;
  1117.         }
  1118.        
  1119.         ppm_draw(shm, shm_size, IPC_GET_ARG1(*call),
  1120.             IPC_GET_ARG2(*call), vport->width - x, vport->height - y, putpixel, (void *) vport);
  1121.         break;
  1122.     case FB_DRAW_TEXT_DATA:
  1123.         x = IPC_GET_ARG1(*call);
  1124.         y = IPC_GET_ARG2(*call);
  1125.         w = IPC_GET_ARG3(*call);
  1126.         h = IPC_GET_ARG4(*call);
  1127.         if (!interbuffer) {
  1128.             retval = EINVAL;
  1129.             break;
  1130.         }
  1131.         if (x + w > vport->cols || y + h > vport->rows) {
  1132.             retval = EINVAL;
  1133.             break;
  1134.         }
  1135.         if (intersize < w * h * sizeof(*interbuffer)) {
  1136.             retval = EINVAL;
  1137.             break;
  1138.         }
  1139.         draw_text_data(vport, interbuffer, x, y, w, h);
  1140.         break;
  1141.     default:
  1142.         handled = false;
  1143.     }
  1144.    
  1145.     if (handled)
  1146.         ipc_answer_0(callid, retval);
  1147.     return handled;
  1148. }
  1149.  
  1150.  
  1151. static void copy_vp_to_pixmap(viewport_t *vport, pixmap_t *pmap)
  1152. {
  1153.     unsigned int width = vport->width;
  1154.     unsigned int height = vport->height;
  1155.    
  1156.     if (width + vport->x > screen.xres)
  1157.         width = screen.xres - vport->x;
  1158.     if (height + vport->y > screen.yres)
  1159.         height = screen.yres - vport->y;
  1160.    
  1161.     unsigned int realwidth = pmap->width <= width ? pmap->width : width;
  1162.     unsigned int realheight = pmap->height <= height ? pmap->height : height;
  1163.    
  1164.     unsigned int srcrowsize = vport->width * screen.pixelbytes;
  1165.     unsigned int realrowsize = realwidth * screen.pixelbytes;
  1166.    
  1167.     unsigned int y;
  1168.     for (y = 0; y < realheight; y++) {
  1169.         unsigned int tmp = (vport->y + y) * screen.scanline + vport->x * screen.pixelbytes;
  1170.         memcpy(pmap->data + srcrowsize * y, screen.fb_addr + tmp, realrowsize);
  1171.     }
  1172. }
  1173.  
  1174.  
  1175. /** Save viewport to pixmap
  1176.  *
  1177.  */
  1178. static int save_vp_to_pixmap(viewport_t *vport)
  1179. {
  1180.     int pm;
  1181.     pixmap_t *pmap;
  1182.    
  1183.     pm = find_free_pixmap();
  1184.     if (pm == -1)
  1185.         return ELIMIT;
  1186.    
  1187.     pmap = &pixmaps[pm];
  1188.     pmap->data = malloc(screen.pixelbytes * vport->width * vport->height);
  1189.     if (!pmap->data)
  1190.         return ENOMEM;
  1191.    
  1192.     pmap->width = vport->width;
  1193.     pmap->height = vport->height;
  1194.    
  1195.     copy_vp_to_pixmap(vport, pmap);
  1196.    
  1197.     return pm;
  1198. }
  1199.  
  1200.  
  1201. /** Draw pixmap on screen
  1202.  *
  1203.  * @param vp Viewport to draw on
  1204.  * @param pm Pixmap identifier
  1205.  *
  1206.  */
  1207. static int draw_pixmap(int vp, int pm)
  1208. {
  1209.     pixmap_t *pmap = &pixmaps[pm];
  1210.     viewport_t *vport = &viewports[vp];
  1211.    
  1212.     unsigned int width = vport->width;
  1213.     unsigned int height = vport->height;
  1214.    
  1215.     if (width + vport->x > screen.xres)
  1216.         width = screen.xres - vport->x;
  1217.     if (height + vport->y > screen.yres)
  1218.         height = screen.yres - vport->y;
  1219.    
  1220.     if (!pmap->data)
  1221.         return EINVAL;
  1222.    
  1223.     unsigned int realwidth = pmap->width <= width ? pmap->width : width;
  1224.     unsigned int realheight = pmap->height <= height ? pmap->height : height;
  1225.    
  1226.     unsigned int srcrowsize = vport->width * screen.pixelbytes;
  1227.     unsigned int realrowsize = realwidth * screen.pixelbytes;
  1228.    
  1229.     unsigned int y;
  1230.     for (y = 0; y < realheight; y++) {
  1231.         unsigned int tmp = (vport->y + y) * screen.scanline + vport->x * screen.pixelbytes;
  1232.         memcpy(screen.fb_addr + tmp, pmap->data + y * srcrowsize, realrowsize);
  1233.     }
  1234.    
  1235.     return EOK;
  1236. }
  1237.  
  1238.  
  1239. /** Tick animation one step forward
  1240.  *
  1241.  */
  1242. static void anims_tick(void)
  1243. {
  1244.     unsigned int i;
  1245.     static int counts = 0;
  1246.    
  1247.     /* Limit redrawing */
  1248.     counts = (counts + 1) % 8;
  1249.     if (counts)
  1250.         return;
  1251.    
  1252.     for (i = 0; i < MAX_ANIMATIONS; i++) {
  1253.         if ((!animations[i].animlen) || (!animations[i].initialized) ||
  1254.             (!animations[i].enabled))
  1255.             continue;
  1256.        
  1257.         draw_pixmap(animations[i].vp, animations[i].pixmaps[animations[i].pos]);
  1258.         animations[i].pos = (animations[i].pos + 1) % animations[i].animlen;
  1259.     }
  1260. }
  1261.  
  1262.  
  1263. static unsigned int pointer_x;
  1264. static unsigned int pointer_y;
  1265. static bool pointer_shown, pointer_enabled;
  1266. static int pointer_vport = -1;
  1267. static int pointer_pixmap = -1;
  1268.  
  1269.  
  1270. static void mouse_show(void)
  1271. {
  1272.     int i, j;
  1273.     int visibility;
  1274.     int color;
  1275.     int bytepos;
  1276.    
  1277.     if ((pointer_shown) || (!pointer_enabled))
  1278.         return;
  1279.    
  1280.     /* Save image under the pointer. */
  1281.     if (pointer_vport == -1) {
  1282.         pointer_vport = vport_create(pointer_x, pointer_y, pointer_width, pointer_height);
  1283.         if (pointer_vport < 0)
  1284.             return;
  1285.     } else {
  1286.         viewports[pointer_vport].x = pointer_x;
  1287.         viewports[pointer_vport].y = pointer_y;
  1288.     }
  1289.    
  1290.     if (pointer_pixmap == -1)
  1291.         pointer_pixmap = save_vp_to_pixmap(&viewports[pointer_vport]);
  1292.     else
  1293.         copy_vp_to_pixmap(&viewports[pointer_vport], &pixmaps[pointer_pixmap]);
  1294.    
  1295.     /* Draw mouse pointer. */
  1296.     for (i = 0; i < pointer_height; i++)
  1297.         for (j = 0; j < pointer_width; j++) {
  1298.             bytepos = i * ((pointer_width - 1) / 8 + 1) + j / 8;
  1299.             visibility = pointer_mask_bits[bytepos] &
  1300.                 (1 << (j % 8));
  1301.             if (visibility) {
  1302.                 color = pointer_bits[bytepos] &
  1303.                     (1 << (j % 8)) ? 0 : 0xffffff;
  1304.                 if (pointer_x + j < screen.xres && pointer_y +
  1305.                     i < screen.yres)
  1306.                     putpixel(&viewports[0], pointer_x + j,
  1307.                         pointer_y + i, color);
  1308.             }
  1309.         }
  1310.     pointer_shown = 1;
  1311. }
  1312.  
  1313.  
  1314. static void mouse_hide(void)
  1315. {
  1316.     /* Restore image under the pointer. */
  1317.     if (pointer_shown) {
  1318.         draw_pixmap(pointer_vport, pointer_pixmap);
  1319.         pointer_shown = 0;
  1320.     }
  1321. }
  1322.  
  1323.  
  1324. static void mouse_move(unsigned int x, unsigned int y)
  1325. {
  1326.     mouse_hide();
  1327.     pointer_x = x;
  1328.     pointer_y = y;
  1329.     mouse_show();
  1330. }
  1331.  
  1332.  
  1333. static int anim_handle(ipc_callid_t callid, ipc_call_t *call, int vp)
  1334. {
  1335.     bool handled = true;
  1336.     int retval = EOK;
  1337.     int i, nvp;
  1338.     int newval;
  1339.    
  1340.     switch (IPC_GET_METHOD(*call)) {
  1341.     case FB_ANIM_CREATE:
  1342.         nvp = IPC_GET_ARG1(*call);
  1343.         if (nvp == -1)
  1344.             nvp = vp;
  1345.         if (nvp >= MAX_VIEWPORTS || nvp < 0 ||
  1346.             !viewports[nvp].initialized) {
  1347.             retval = EINVAL;
  1348.             break;
  1349.         }
  1350.         for (i = 0; i < MAX_ANIMATIONS; i++) {
  1351.             if (!animations[i].initialized)
  1352.                 break;
  1353.         }
  1354.         if (i == MAX_ANIMATIONS) {
  1355.             retval = ELIMIT;
  1356.             break;
  1357.         }
  1358.         animations[i].initialized = 1;
  1359.         animations[i].animlen = 0;
  1360.         animations[i].pos = 0;
  1361.         animations[i].enabled = 0;
  1362.         animations[i].vp = nvp;
  1363.         retval = i;
  1364.         break;
  1365.     case FB_ANIM_DROP:
  1366.         i = IPC_GET_ARG1(*call);
  1367.         if (i >= MAX_ANIMATIONS || i < 0) {
  1368.             retval = EINVAL;
  1369.             break;
  1370.         }
  1371.         animations[i].initialized = 0;
  1372.         break;
  1373.     case FB_ANIM_ADDPIXMAP:
  1374.         i = IPC_GET_ARG1(*call);
  1375.         if (i >= MAX_ANIMATIONS || i < 0 ||
  1376.             !animations[i].initialized) {
  1377.             retval = EINVAL;
  1378.             break;
  1379.         }
  1380.         if (animations[i].animlen == MAX_ANIM_LEN) {
  1381.             retval = ELIMIT;
  1382.             break;
  1383.         }
  1384.         newval = IPC_GET_ARG2(*call);
  1385.         if (newval < 0 || newval > MAX_PIXMAPS ||
  1386.             !pixmaps[newval].data) {
  1387.             retval = EINVAL;
  1388.             break;
  1389.         }
  1390.         animations[i].pixmaps[animations[i].animlen++] = newval;
  1391.         break;
  1392.     case FB_ANIM_CHGVP:
  1393.         i = IPC_GET_ARG1(*call);
  1394.         if (i >= MAX_ANIMATIONS || i < 0) {
  1395.             retval = EINVAL;
  1396.             break;
  1397.         }
  1398.         nvp = IPC_GET_ARG2(*call);
  1399.         if (nvp == -1)
  1400.             nvp = vp;
  1401.         if (nvp >= MAX_VIEWPORTS || nvp < 0 ||
  1402.             !viewports[nvp].initialized) {
  1403.             retval = EINVAL;
  1404.             break;
  1405.         }
  1406.         animations[i].vp = nvp;
  1407.         break;
  1408.     case FB_ANIM_START:
  1409.     case FB_ANIM_STOP:
  1410.         i = IPC_GET_ARG1(*call);
  1411.         if (i >= MAX_ANIMATIONS || i < 0) {
  1412.             retval = EINVAL;
  1413.             break;
  1414.         }
  1415.         newval = (IPC_GET_METHOD(*call) == FB_ANIM_START);
  1416.         if (newval ^ animations[i].enabled) {
  1417.             animations[i].enabled = newval;
  1418.             anims_enabled += newval ? 1 : -1;
  1419.         }
  1420.         break;
  1421.     default:
  1422.         handled = 0;
  1423.     }
  1424.     if (handled)
  1425.         ipc_answer_0(callid, retval);
  1426.     return handled;
  1427. }
  1428.  
  1429.  
  1430. /** Handler for messages concerning pixmap handling
  1431.  *
  1432.  */
  1433. static int pixmap_handle(ipc_callid_t callid, ipc_call_t *call, int vp)
  1434. {
  1435.     bool handled = true;
  1436.     int retval = EOK;
  1437.     int i, nvp;
  1438.    
  1439.     switch (IPC_GET_METHOD(*call)) {
  1440.     case FB_VP_DRAW_PIXMAP:
  1441.         nvp = IPC_GET_ARG1(*call);
  1442.         if (nvp == -1)
  1443.             nvp = vp;
  1444.         if (nvp < 0 || nvp >= MAX_VIEWPORTS ||
  1445.             !viewports[nvp].initialized) {
  1446.             retval = EINVAL;
  1447.             break;
  1448.         }
  1449.         i = IPC_GET_ARG2(*call);
  1450.         retval = draw_pixmap(nvp, i);
  1451.         break;
  1452.     case FB_VP2PIXMAP:
  1453.         nvp = IPC_GET_ARG1(*call);
  1454.         if (nvp == -1)
  1455.             nvp = vp;
  1456.         if (nvp < 0 || nvp >= MAX_VIEWPORTS ||
  1457.             !viewports[nvp].initialized)
  1458.             retval = EINVAL;
  1459.         else
  1460.             retval = save_vp_to_pixmap(&viewports[nvp]);
  1461.         break;
  1462.     case FB_DROP_PIXMAP:
  1463.         i = IPC_GET_ARG1(*call);
  1464.         if (i >= MAX_PIXMAPS) {
  1465.             retval = EINVAL;
  1466.             break;
  1467.         }
  1468.         if (pixmaps[i].data) {
  1469.             free(pixmaps[i].data);
  1470.             pixmaps[i].data = NULL;
  1471.         }
  1472.         break;
  1473.     default:
  1474.         handled = 0;
  1475.     }
  1476.    
  1477.     if (handled)
  1478.         ipc_answer_0(callid, retval);
  1479.     return handled;
  1480.    
  1481. }
  1482.  
  1483. static int rgb_from_style(attr_rgb_t *rgb, int style)
  1484. {
  1485.     switch (style) {
  1486.     case STYLE_NORMAL:
  1487.         rgb->fg_color = color_table[COLOR_BLACK];
  1488.         rgb->bg_color = color_table[COLOR_WHITE];
  1489.         break;
  1490.     case STYLE_EMPHASIS:
  1491.         rgb->fg_color = color_table[COLOR_RED];
  1492.         rgb->bg_color = color_table[COLOR_WHITE];
  1493.         break;
  1494.     default:
  1495.         return EINVAL;
  1496.     }
  1497.  
  1498.     return EOK;
  1499. }
  1500.  
  1501. static int rgb_from_idx(attr_rgb_t *rgb, ipcarg_t fg_color,
  1502.     ipcarg_t bg_color, ipcarg_t flags)
  1503. {
  1504.     fg_color = (fg_color & 7) | ((flags & CATTR_BRIGHT) ? 8 : 0);
  1505.     bg_color = (bg_color & 7) | ((flags & CATTR_BRIGHT) ? 8 : 0);
  1506.  
  1507.     rgb->fg_color = color_table[fg_color];
  1508.     rgb->bg_color = color_table[bg_color];
  1509.  
  1510.     return EOK;
  1511. }
  1512.  
  1513. static int rgb_from_attr(attr_rgb_t *rgb, const attrs_t *a)
  1514. {
  1515.     int rc;
  1516.  
  1517.     switch (a->t) {
  1518.     case at_style:
  1519.         rc = rgb_from_style(rgb, a->a.s.style);
  1520.         break;
  1521.     case at_idx:
  1522.         rc = rgb_from_idx(rgb, a->a.i.fg_color,
  1523.             a->a.i.bg_color, a->a.i.flags);
  1524.         break;
  1525.     case at_rgb:
  1526.         *rgb = a->a.r;
  1527.         rc = EOK;
  1528.         break;
  1529.     }
  1530.  
  1531.     return rc;
  1532. }
  1533.  
  1534. static int fb_set_style(viewport_t *vport, ipcarg_t style)
  1535. {
  1536.     return rgb_from_style(&vport->attr, (int) style);
  1537. }
  1538.  
  1539. static int fb_set_color(viewport_t *vport, ipcarg_t fg_color,
  1540.     ipcarg_t bg_color, ipcarg_t flags)
  1541. {
  1542.     return rgb_from_idx(&vport->attr, fg_color, bg_color, flags);
  1543. }
  1544.  
  1545. /** Function for handling connections to FB
  1546.  *
  1547.  */
  1548. static void fb_client_connection(ipc_callid_t iid, ipc_call_t *icall)
  1549. {
  1550.     unsigned int vp = 0;
  1551.     viewport_t *vport = &viewports[vp];
  1552.    
  1553.     if (client_connected) {
  1554.         ipc_answer_0(iid, ELIMIT);
  1555.         return;
  1556.     }
  1557.    
  1558.     /* Accept connection */
  1559.     client_connected = true;
  1560.     ipc_answer_0(iid, EOK);
  1561.    
  1562.     while (true) {
  1563.         ipc_callid_t callid;
  1564.         ipc_call_t call;
  1565.         int retval;
  1566.         unsigned int i;
  1567.         int scroll;
  1568.         wchar_t ch;
  1569.         unsigned int col, row;
  1570.        
  1571.         if ((vport->cursor_active) || (anims_enabled))
  1572.             callid = async_get_call_timeout(&call, 250000);
  1573.         else
  1574.             callid = async_get_call(&call);
  1575.        
  1576.         mouse_hide();
  1577.         if (!callid) {
  1578.             cursor_blink(vport);
  1579.             anims_tick();
  1580.             mouse_show();
  1581.             continue;
  1582.         }
  1583.        
  1584.         if (shm_handle(callid, &call, vp))
  1585.             continue;
  1586.        
  1587.         if (pixmap_handle(callid, &call, vp))
  1588.             continue;
  1589.        
  1590.         if (anim_handle(callid, &call, vp))
  1591.             continue;
  1592.        
  1593.         switch (IPC_GET_METHOD(call)) {
  1594.         case IPC_M_PHONE_HUNGUP:
  1595.             client_connected = false;
  1596.            
  1597.             /* Cleanup other viewports */
  1598.             for (i = 1; i < MAX_VIEWPORTS; i++)
  1599.                 vport->initialized = false;
  1600.            
  1601.             /* Exit thread */
  1602.             return;
  1603.        
  1604.         case FB_PUTCHAR:
  1605.             ch = IPC_GET_ARG1(call);
  1606.             col = IPC_GET_ARG2(call);
  1607.             row = IPC_GET_ARG3(call);
  1608.            
  1609.             if ((col >= vport->cols) || (row >= vport->rows)) {
  1610.                 retval = EINVAL;
  1611.                 break;
  1612.             }
  1613.             ipc_answer_0(callid, EOK);
  1614.            
  1615.             draw_char(vport, ch, col, row);
  1616.            
  1617.             /* Message already answered */
  1618.             continue;
  1619.         case FB_CLEAR:
  1620.             vport_clear(vport);
  1621.             cursor_show(vport);
  1622.             retval = EOK;
  1623.             break;
  1624.         case FB_CURSOR_GOTO:
  1625.             col = IPC_GET_ARG1(call);
  1626.             row = IPC_GET_ARG2(call);
  1627.            
  1628.             if ((col >= vport->cols) || (row >= vport->rows)) {
  1629.                 retval = EINVAL;
  1630.                 break;
  1631.             }
  1632.             retval = EOK;
  1633.            
  1634.             cursor_hide(vport);
  1635.             vport->cur_col = col;
  1636.             vport->cur_row = row;
  1637.             cursor_show(vport);
  1638.             break;
  1639.         case FB_CURSOR_VISIBILITY:
  1640.             cursor_hide(vport);
  1641.             vport->cursor_active = IPC_GET_ARG1(call);
  1642.             cursor_show(vport);
  1643.             retval = EOK;
  1644.             break;
  1645.         case FB_GET_CSIZE:
  1646.             ipc_answer_2(callid, EOK, vport->cols, vport->rows);
  1647.             continue;
  1648.         case FB_SCROLL:
  1649.             scroll = IPC_GET_ARG1(call);
  1650.             if ((scroll > (int) vport->rows) || (scroll < (-(int) vport->rows))) {
  1651.                 retval = EINVAL;
  1652.                 break;
  1653.             }
  1654.             cursor_hide(vport);
  1655.             vport_scroll(vport, scroll);
  1656.             cursor_show(vport);
  1657.             retval = EOK;
  1658.             break;
  1659.         case FB_VIEWPORT_SWITCH:
  1660.             i = IPC_GET_ARG1(call);
  1661.             if (i >= MAX_VIEWPORTS) {
  1662.                 retval = EINVAL;
  1663.                 break;
  1664.             }
  1665.             if (!viewports[i].initialized) {
  1666.                 retval = EADDRNOTAVAIL;
  1667.                 break;
  1668.             }
  1669.             cursor_hide(vport);
  1670.             vp = i;
  1671.             vport = &viewports[vp];
  1672.             cursor_show(vport);
  1673.             retval = EOK;
  1674.             break;
  1675.         case FB_VIEWPORT_CREATE:
  1676.             retval = vport_create(IPC_GET_ARG1(call) >> 16,
  1677.                 IPC_GET_ARG1(call) & 0xffff,
  1678.                 IPC_GET_ARG2(call) >> 16,
  1679.                 IPC_GET_ARG2(call) & 0xffff);
  1680.             break;
  1681.         case FB_VIEWPORT_DELETE:
  1682.             i = IPC_GET_ARG1(call);
  1683.             if (i >= MAX_VIEWPORTS) {
  1684.                 retval = EINVAL;
  1685.                 break;
  1686.             }
  1687.             if (!viewports[i].initialized) {
  1688.                 retval = EADDRNOTAVAIL;
  1689.                 break;
  1690.             }
  1691.             viewports[i].initialized = false;
  1692.             if (viewports[i].bgpixel)
  1693.                 free(viewports[i].bgpixel);
  1694.             if (viewports[i].backbuf)
  1695.                 free(viewports[i].backbuf);
  1696.             retval = EOK;
  1697.             break;
  1698.         case FB_SET_STYLE:
  1699.             retval = fb_set_style(vport, IPC_GET_ARG1(call));
  1700.             break;
  1701.         case FB_SET_COLOR:
  1702.             retval = fb_set_color(vport, IPC_GET_ARG1(call),
  1703.                 IPC_GET_ARG2(call), IPC_GET_ARG3(call));
  1704.             break;
  1705.         case FB_SET_RGB_COLOR:
  1706.             vport->attr.fg_color = IPC_GET_ARG1(call);
  1707.             vport->attr.bg_color = IPC_GET_ARG2(call);
  1708.             retval = EOK;
  1709.             break;
  1710.         case FB_GET_RESOLUTION:
  1711.             ipc_answer_2(callid, EOK, screen.xres, screen.yres);
  1712.             continue;
  1713.         case FB_POINTER_MOVE:
  1714.             pointer_enabled = true;
  1715.             mouse_move(IPC_GET_ARG1(call), IPC_GET_ARG2(call));
  1716.             retval = EOK;
  1717.             break;
  1718.         case FB_SCREEN_YIELD:
  1719.         case FB_SCREEN_RECLAIM:
  1720.             retval = EOK;
  1721.             break;
  1722.         default:
  1723.             retval = ENOENT;
  1724.         }
  1725.         ipc_answer_0(callid, retval);
  1726.     }
  1727. }
  1728.  
  1729. /** Initialization of framebuffer
  1730.  *
  1731.  */
  1732. int fb_init(void)
  1733. {
  1734.     async_set_client_connection(fb_client_connection);
  1735.    
  1736.     void *fb_ph_addr = (void *) sysinfo_value("fb.address.physical");
  1737.     unsigned int fb_offset = sysinfo_value("fb.offset");
  1738.     unsigned int fb_width = sysinfo_value("fb.width");
  1739.     unsigned int fb_height = sysinfo_value("fb.height");
  1740.     unsigned int fb_scanline = sysinfo_value("fb.scanline");
  1741.     unsigned int fb_visual = sysinfo_value("fb.visual");
  1742.    
  1743.     unsigned int fbsize = fb_scanline * fb_height;
  1744.     void *fb_addr = as_get_mappable_page(fbsize);
  1745.    
  1746.     if (physmem_map(fb_ph_addr + fb_offset, fb_addr,
  1747.         ALIGN_UP(fbsize, PAGE_SIZE) >> PAGE_WIDTH, AS_AREA_READ | AS_AREA_WRITE) != 0)
  1748.         return -1;
  1749.    
  1750.     if (screen_init(fb_addr, fb_width, fb_height, fb_scanline, fb_visual))
  1751.         return 0;
  1752.    
  1753.     return -1;
  1754. }
  1755.  
  1756. /**
  1757.  * @}
  1758.  */
  1759.