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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 ((row + lines >= 0) && (row + lines < vport->rows)) {
  454.                 xbp = &vport->backbuf[BB_POS(vport, col, row + lines)];
  455.                 bbp = &vport->backbuf[BB_POS(vport, col, row)];
  456.                
  457.                 glyph = xbp->glyph;
  458.                 fg_color = xbp->fg_color;
  459.                 bg_color = xbp->bg_color;
  460.                
  461.                 if ((bbp->glyph == glyph)
  462.                    && (bbp->fg_color == xbp->fg_color)
  463.                    && (bbp->bg_color == xbp->bg_color)) {
  464.                     x += FONT_WIDTH;
  465.                     continue;
  466.                 }
  467.             } else {
  468.                 glyph = 0;
  469.                 fg_color = vport->attr.fg_color;
  470.                 bg_color = vport->attr.bg_color;
  471.             }
  472.            
  473.             (*vport->dglyph)(x, y, false, screen.glyphs, glyph,
  474.                 fg_color, bg_color);
  475.             x += FONT_WIDTH;
  476.         }
  477.         y += FONT_SCANLINES;
  478.     }
  479.    
  480.     /*
  481.      * Scroll backbuffer.
  482.      */
  483.    
  484.     if (lines > 0) {
  485.         memmove(vport->backbuf, vport->backbuf + vport->cols * lines,
  486.             vport->cols * (vport->rows - lines) * sizeof(bb_cell_t));
  487.         backbuf_clear(&vport->backbuf[BB_POS(vport, 0, vport->rows - lines)],
  488.             vport->cols * lines, vport->attr.fg_color, vport->attr.bg_color);
  489.     } else {
  490.         memmove(vport->backbuf - vport->cols * lines, vport->backbuf,
  491.             vport->cols * (vport->rows + lines) * sizeof(bb_cell_t));
  492.         backbuf_clear(vport->backbuf, - vport->cols * lines,
  493.             vport->attr.fg_color, vport->attr.bg_color);
  494.     }
  495. }
  496.  
  497. /** Render glyphs
  498.  *
  499.  * Convert glyphs from device independent font
  500.  * description to current visual representation.
  501.  *
  502.  */
  503. static void render_glyphs(void)
  504. {
  505.     unsigned int glyph;
  506.    
  507.     for (glyph = 0; glyph < FONT_GLYPHS; glyph++) {
  508.         unsigned int y;
  509.        
  510.         for (y = 0; y < FONT_SCANLINES; y++) {
  511.             unsigned int x;
  512.            
  513.             for (x = 0; x < FONT_WIDTH; x++) {
  514.                 screen.mask_conv(&screen.glyphs[GLYPH_POS(glyph, y, false) + x * screen.pixelbytes],
  515.                     (fb_font[glyph][y] & (1 << (7 - x))) ? true : false);
  516.                
  517.                 screen.mask_conv(&screen.glyphs[GLYPH_POS(glyph, y, true) + x * screen.pixelbytes],
  518.                     (fb_font[glyph][y] & (1 << (7 - x))) ? false : true);
  519.             }
  520.         }
  521.     }
  522. }
  523.  
  524. /** Create new viewport
  525.  *
  526.  * @param x      Origin of the viewport (x).
  527.  * @param y      Origin of the viewport (y).
  528.  * @param width  Width of the viewport.
  529.  * @param height Height of the viewport.
  530.  *
  531.  * @return New viewport number.
  532.  *
  533.  */
  534. static int vport_create(unsigned int x, unsigned int y,
  535.     unsigned int width, unsigned int height)
  536. {
  537.     unsigned int i;
  538.    
  539.     for (i = 0; i < MAX_VIEWPORTS; i++) {
  540.         if (!viewports[i].initialized)
  541.             break;
  542.     }
  543.    
  544.     if (i == MAX_VIEWPORTS)
  545.         return ELIMIT;
  546.    
  547.     unsigned int cols = width / FONT_WIDTH;
  548.     unsigned int rows = height / FONT_SCANLINES;
  549.     unsigned int bbsize = cols * rows * sizeof(bb_cell_t);
  550.     unsigned int word_size = sizeof(unsigned long);
  551.    
  552.     bb_cell_t *backbuf = (bb_cell_t *) malloc(bbsize);
  553.     if (!backbuf)
  554.         return ENOMEM;
  555.    
  556.     uint8_t *bgpixel = (uint8_t *) malloc(screen.pixelbytes);
  557.     if (!bgpixel) {
  558.         free(backbuf);
  559.         return ENOMEM;
  560.     }
  561.    
  562.     backbuf_clear(backbuf, cols * rows, DEFAULT_FGCOLOR, DEFAULT_BGCOLOR);
  563.     memset(bgpixel, 0, screen.pixelbytes);
  564.    
  565.     viewports[i].x = x;
  566.     viewports[i].y = y;
  567.     viewports[i].width = width;
  568.     viewports[i].height = height;
  569.    
  570.     viewports[i].cols = cols;
  571.     viewports[i].rows = rows;
  572.    
  573.     viewports[i].attr.bg_color = DEFAULT_BGCOLOR;
  574.     viewports[i].attr.fg_color = DEFAULT_FGCOLOR;
  575.    
  576.     viewports[i].bgpixel = bgpixel;
  577.    
  578.     /*
  579.      * Conditions necessary to select aligned version:
  580.      *  - word size is divisible by pixelbytes
  581.      *  - cell scanline size is divisible by word size
  582.      *  - cell scanlines are word-aligned
  583.      *
  584.      */
  585.     if (((word_size % screen.pixelbytes) == 0)
  586.         && ((FONT_WIDTH * screen.pixelbytes) % word_size == 0)
  587.         && ((x * screen.pixelbytes) % word_size == 0)
  588.         && (screen.scanline % word_size == 0)) {
  589.         viewports[i].dglyph = draw_glyph_aligned;
  590.     } else {
  591.         viewports[i].dglyph = draw_glyph_fallback;
  592.     }
  593.    
  594.     viewports[i].cur_col = 0;
  595.     viewports[i].cur_row = 0;
  596.     viewports[i].cursor_active = false;
  597.     viewports[i].cursor_shown = false;
  598.    
  599.     viewports[i].bbsize = bbsize;
  600.     viewports[i].backbuf = backbuf;
  601.    
  602.     viewports[i].initialized = true;
  603.    
  604.     screen.rgb_conv(viewports[i].bgpixel, viewports[i].attr.bg_color);
  605.    
  606.     return i;
  607. }
  608.  
  609.  
  610. /** Initialize framebuffer as a chardev output device
  611.  *
  612.  * @param addr   Address of the framebuffer
  613.  * @param xres   Screen width in pixels
  614.  * @param yres   Screen height in pixels
  615.  * @param visual Bits per pixel (8, 16, 24, 32)
  616.  * @param scan   Bytes per one scanline
  617.  *
  618.  */
  619. static bool screen_init(void *addr, unsigned int xres, unsigned int yres,
  620.     unsigned int scan, unsigned int visual)
  621. {
  622.    
  623.    
  624.     switch (visual) {
  625.     case VISUAL_INDIRECT_8:
  626.         screen.rgb_conv = rgb_323;
  627.         screen.mask_conv = mask_323;
  628.         screen.pixelbytes = 1;
  629.         break;
  630.     case VISUAL_RGB_5_5_5:
  631.         screen.rgb_conv = rgb_555;
  632.         screen.mask_conv = mask_555;
  633.         screen.pixelbytes = 2;
  634.         break;
  635.     case VISUAL_RGB_5_6_5:
  636.         screen.rgb_conv = rgb_565;
  637.         screen.mask_conv = mask_565;
  638.         screen.pixelbytes = 2;
  639.         break;
  640.     case VISUAL_RGB_8_8_8:
  641.         screen.rgb_conv = rgb_888;
  642.         screen.mask_conv = mask_888;
  643.         screen.pixelbytes = 3;
  644.         break;
  645.     case VISUAL_BGR_8_8_8:
  646.         screen.rgb_conv = bgr_888;
  647.         screen.mask_conv = mask_888;
  648.         screen.pixelbytes = 3;
  649.         break;
  650.     case VISUAL_RGB_8_8_8_0:
  651.         screen.rgb_conv = rgb_888;
  652.         screen.mask_conv = mask_888;
  653.         screen.pixelbytes = 4;
  654.         break;
  655.     case VISUAL_RGB_0_8_8_8:
  656.         screen.rgb_conv = rgb_0888;
  657.         screen.mask_conv = mask_0888;
  658.         screen.pixelbytes = 4;
  659.         break;
  660.     case VISUAL_BGR_0_8_8_8:
  661.         screen.rgb_conv = bgr_0888;
  662.         screen.mask_conv = mask_0888;
  663.         screen.pixelbytes = 4;
  664.         break;
  665.     default:
  666.         return false;
  667.     }
  668.    
  669.     screen.fb_addr = (unsigned char *) addr;
  670.     screen.xres = xres;
  671.     screen.yres = yres;
  672.     screen.scanline = scan;
  673.    
  674.     screen.glyphscanline = FONT_WIDTH * screen.pixelbytes;
  675.     screen.glyphbytes = screen.glyphscanline * FONT_SCANLINES;
  676.    
  677.     size_t glyphsize = 2 * FONT_GLYPHS * screen.glyphbytes;
  678.     uint8_t *glyphs = (uint8_t *) malloc(glyphsize);
  679.     if (!glyphs)
  680.         return false;
  681.    
  682.     memset(glyphs, 0, glyphsize);
  683.     screen.glyphs = glyphs;
  684.    
  685.     render_glyphs();
  686.    
  687.     /* Create first viewport */
  688.     vport_create(0, 0, xres, yres);
  689.    
  690.     return true;
  691. }
  692.  
  693.  
  694. /** Draw a glyph, takes advantage of alignment.
  695.  *
  696.  * This version can only be used if the following conditions are met:
  697.  *
  698.  *   - word size is divisible by pixelbytes
  699.  *   - cell scanline size is divisible by word size
  700.  *   - cell scanlines are word-aligned
  701.  *
  702.  * It makes use of the pre-rendered mask to process (possibly) several
  703.  * pixels at once (word size / pixelbytes pixels at a time are processed)
  704.  * making it very fast. Most notably this version is not applicable at 24 bits
  705.  * per pixel.
  706.  *
  707.  * @param x        x coordinate of top-left corner on screen.
  708.  * @param y        y coordinate of top-left corner on screen.
  709.  * @param cursor   Draw glyph with cursor
  710.  * @param glyphs   Pointer to font bitmap.
  711.  * @param glyph    Code of the glyph to draw.
  712.  * @param fg_color Foreground color.
  713.  * @param bg_color Backgroudn color.
  714.  *
  715.  */
  716. static void draw_glyph_aligned(unsigned int x, unsigned int y, bool cursor,
  717.     uint8_t *glyphs, uint32_t glyph, uint32_t fg_color, uint32_t bg_color)
  718. {
  719.     unsigned int i;
  720.     unsigned int yd;
  721.     unsigned long fg_buf;
  722.     unsigned long bg_buf;
  723.     unsigned long mask;
  724.    
  725.     /*
  726.      * Prepare a pair of words, one filled with foreground-color
  727.      * pattern and the other filled with background-color pattern.
  728.      */
  729.     for (i = 0; i < sizeof(unsigned long) / screen.pixelbytes; i++) {
  730.         screen.rgb_conv(&((uint8_t *) &fg_buf)[i * screen.pixelbytes],
  731.             fg_color);
  732.         screen.rgb_conv(&((uint8_t *) &bg_buf)[i * screen.pixelbytes],
  733.             bg_color);
  734.     }
  735.    
  736.     /* Pointer to the current position in the mask. */
  737.     unsigned long *maskp = (unsigned long *) &glyphs[GLYPH_POS(glyph, 0, cursor)];
  738.    
  739.     /* Pointer to the current position on the screen. */
  740.     unsigned long *dp = (unsigned long *) &screen.fb_addr[FB_POS(x, y)];
  741.    
  742.     /* Width of the character cell in words. */
  743.     unsigned int ww = FONT_WIDTH * screen.pixelbytes / sizeof(unsigned long);
  744.    
  745.     /* Offset to add when moving to another screen scanline. */
  746.     unsigned int d_add = screen.scanline - FONT_WIDTH * screen.pixelbytes;
  747.    
  748.     for (yd = 0; yd < FONT_SCANLINES; yd++) {
  749.         /*
  750.          * Now process the cell scanline, combining foreground
  751.          * and background color patters using the pre-rendered mask.
  752.          */
  753.         for (i = 0; i < ww; i++) {
  754.             mask = *maskp++;
  755.             *dp++ = (fg_buf & mask) | (bg_buf & ~mask);
  756.         }
  757.        
  758.         /* Move to the beginning of the next scanline of the cell. */
  759.         dp = (unsigned long *) ((uint8_t *) dp + d_add);
  760.     }
  761. }
  762.  
  763. /** Draw a glyph, fallback version.
  764.  *
  765.  * This version does not make use of the pre-rendered mask, it uses
  766.  * the font bitmap directly. It works always, but it is slower.
  767.  *
  768.  * @param x        x coordinate of top-left corner on screen.
  769.  * @param y        y coordinate of top-left corner on screen.
  770.  * @param cursor   Draw glyph with cursor
  771.  * @param glyphs   Pointer to font bitmap.
  772.  * @param glyph    Code of the glyph to draw.
  773.  * @param fg_color Foreground color.
  774.  * @param bg_color Backgroudn color.
  775.  *
  776.  */
  777. void draw_glyph_fallback(unsigned int x, unsigned int y, bool cursor,
  778.     uint8_t *glyphs, uint32_t glyph, uint32_t fg_color, uint32_t bg_color)
  779. {
  780.     unsigned int i;
  781.     unsigned int j;
  782.     unsigned int yd;
  783.     uint8_t fg_buf[4];
  784.     uint8_t bg_buf[4];
  785.     uint8_t *sp;
  786.     uint8_t b;
  787.    
  788.     /* Pre-render 1x the foreground and background color pixels. */
  789.     if (cursor) {
  790.         screen.rgb_conv(fg_buf, bg_color);
  791.         screen.rgb_conv(bg_buf, fg_color);
  792.     } else {
  793.         screen.rgb_conv(fg_buf, fg_color);
  794.         screen.rgb_conv(bg_buf, bg_color);
  795.     }
  796.    
  797.     /* Pointer to the current position on the screen. */
  798.     uint8_t *dp = (uint8_t *) &screen.fb_addr[FB_POS(x, y)];
  799.    
  800.     /* Offset to add when moving to another screen scanline. */
  801.     unsigned int d_add = screen.scanline - FONT_WIDTH * screen.pixelbytes;
  802.    
  803.     for (yd = 0; yd < FONT_SCANLINES; yd++) {
  804.         /* Byte containing bits of the glyph scanline. */
  805.         b = fb_font[glyph][yd];
  806.        
  807.         for (i = 0; i < FONT_WIDTH; i++) {
  808.             /* Choose color based on the current bit. */
  809.             sp = (b & 0x80) ? fg_buf : bg_buf;
  810.            
  811.             /* Copy the pixel. */
  812.             for (j = 0; j < screen.pixelbytes; j++) {
  813.                 *dp++ = *sp++;
  814.             }
  815.            
  816.             /* Move to the next bit. */
  817.             b = b << 1;
  818.         }
  819.        
  820.         /* Move to the beginning of the next scanline of the cell. */
  821.         dp += d_add;
  822.     }
  823. }
  824.  
  825. /** Draw glyph at specified position in viewport.
  826.  *
  827.  * @param vport  Viewport identification
  828.  * @param cursor Draw glyph with cursor
  829.  * @param col    Screen position relative to viewport
  830.  * @param row    Screen position relative to viewport
  831.  *
  832.  */
  833. static void draw_vp_glyph(viewport_t *vport, bool cursor, unsigned int col,
  834.     unsigned int row)
  835. {
  836.     unsigned int x = vport->x + COL2X(col);
  837.     unsigned int y = vport->y + ROW2Y(row);
  838.    
  839.     uint32_t glyph = vport->backbuf[BB_POS(vport, col, row)].glyph;
  840.     uint32_t fg_color = vport->backbuf[BB_POS(vport, col, row)].fg_color;
  841.     uint32_t bg_color = vport->backbuf[BB_POS(vport, col, row)].bg_color;
  842.    
  843.     (*vport->dglyph)(x, y, cursor, screen.glyphs, glyph,
  844.         fg_color, bg_color);
  845. }
  846.  
  847. /** Hide cursor if it is shown
  848.  *
  849.  */
  850. static void cursor_hide(viewport_t *vport)
  851. {
  852.     if ((vport->cursor_active) && (vport->cursor_shown)) {
  853.         draw_vp_glyph(vport, false, vport->cur_col, vport->cur_row);
  854.         vport->cursor_shown = false;
  855.     }
  856. }
  857.  
  858.  
  859. /** Show cursor if cursor showing is enabled
  860.  *
  861.  */
  862. static void cursor_show(viewport_t *vport)
  863. {
  864.     /* Do not check for cursor_shown */
  865.     if (vport->cursor_active) {
  866.         draw_vp_glyph(vport, true, vport->cur_col, vport->cur_row);
  867.         vport->cursor_shown = true;
  868.     }
  869. }
  870.  
  871.  
  872. /** Invert cursor, if it is enabled
  873.  *
  874.  */
  875. static void cursor_blink(viewport_t *vport)
  876. {
  877.     if (vport->cursor_shown)
  878.         cursor_hide(vport);
  879.     else
  880.         cursor_show(vport);
  881. }
  882.  
  883.  
  884. /** Draw character at given position relative to viewport
  885.  *
  886.  * @param vport  Viewport identification
  887.  * @param c      Character to draw
  888.  * @param col    Screen position relative to viewport
  889.  * @param row    Screen position relative to viewport
  890.  *
  891.  */
  892. static void draw_char(viewport_t *vport, wchar_t c, unsigned int col, unsigned int row)
  893. {
  894.     bb_cell_t *bbp;
  895.    
  896.     /* Do not hide cursor if we are going to overwrite it */
  897.     if ((vport->cursor_active) && (vport->cursor_shown) &&
  898.         ((vport->cur_col != col) || (vport->cur_row != row)))
  899.         cursor_hide(vport);
  900.    
  901.     bbp = &vport->backbuf[BB_POS(vport, col, row)];
  902.     bbp->glyph = fb_font_glyph(c);
  903.     bbp->fg_color = vport->attr.fg_color;
  904.     bbp->bg_color = vport->attr.bg_color;
  905.    
  906.     draw_vp_glyph(vport, false, col, row);
  907.    
  908.     vport->cur_col = col;
  909.     vport->cur_row = row;
  910.    
  911.     vport->cur_col++;
  912.     if (vport->cur_col >= vport->cols) {
  913.         vport->cur_col = 0;
  914.         vport->cur_row++;
  915.         if (vport->cur_row >= vport->rows)
  916.             vport->cur_row--;
  917.     }
  918.    
  919.     cursor_show(vport);
  920. }
  921.  
  922. /** Draw text data to viewport.
  923.  *
  924.  * @param vport Viewport id
  925.  * @param data  Text data.
  926.  * @param x     Leftmost column of the area.
  927.  * @param y     Topmost row of the area.
  928.  * @param w     Number of rows.
  929.  * @param h     Number of columns.
  930.  *
  931.  */
  932. static void draw_text_data(viewport_t *vport, keyfield_t *data, unsigned int x,
  933.     unsigned int y, unsigned int w, unsigned int h)
  934. {
  935.     unsigned int i;
  936.     unsigned int j;
  937.     bb_cell_t *bbp;
  938.     attrs_t *a;
  939.     attr_rgb_t rgb;
  940.    
  941.     for (j = 0; j < h; j++) {
  942.         for (i = 0; i < w; i++) {
  943.             unsigned int col = x + i;
  944.             unsigned int row = y + j;
  945.            
  946.             bbp = &vport->backbuf[BB_POS(vport, col, row)];
  947.            
  948.             a = &data[j * w + i].attrs;
  949.             rgb_from_attr(&rgb, a);
  950.            
  951.             bbp->glyph = fb_font_glyph(data[j * w + i].character);
  952.             bbp->fg_color = rgb.fg_color;
  953.             bbp->bg_color = rgb.bg_color;
  954.            
  955.             draw_vp_glyph(vport, false, col, row);
  956.         }
  957.     }
  958.     cursor_show(vport);
  959. }
  960.  
  961.  
  962. static void putpixel_pixmap(void *data, unsigned int x, unsigned int y, uint32_t color)
  963. {
  964.     int pm = *((int *) data);
  965.     pixmap_t *pmap = &pixmaps[pm];
  966.     unsigned int pos = (y * pmap->width + x) * screen.pixelbytes;
  967.    
  968.     screen.rgb_conv(&pmap->data[pos], color);
  969. }
  970.  
  971.  
  972. static void putpixel(void *data, unsigned int x, unsigned int y, uint32_t color)
  973. {
  974.     viewport_t *vport = (viewport_t *) data;
  975.     unsigned int dx = vport->x + x;
  976.     unsigned int dy = vport->y + y;
  977.    
  978.     screen.rgb_conv(&screen.fb_addr[FB_POS(dx, dy)], color);
  979. }
  980.  
  981.  
  982. /** Return first free pixmap
  983.  *
  984.  */
  985. static int find_free_pixmap(void)
  986. {
  987.     unsigned int i;
  988.    
  989.     for (i = 0; i < MAX_PIXMAPS; i++)
  990.         if (!pixmaps[i].data)
  991.             return i;
  992.    
  993.     return -1;
  994. }
  995.  
  996.  
  997. /** Create a new pixmap and return appropriate ID
  998.  *
  999.  */
  1000. static int shm2pixmap(unsigned char *shm, size_t size)
  1001. {
  1002.     int pm;
  1003.     pixmap_t *pmap;
  1004.    
  1005.     pm = find_free_pixmap();
  1006.     if (pm == -1)
  1007.         return ELIMIT;
  1008.    
  1009.     pmap = &pixmaps[pm];
  1010.    
  1011.     if (ppm_get_data(shm, size, &pmap->width, &pmap->height))
  1012.         return EINVAL;
  1013.    
  1014.     pmap->data = malloc(pmap->width * pmap->height * screen.pixelbytes);
  1015.     if (!pmap->data)
  1016.         return ENOMEM;
  1017.    
  1018.     ppm_draw(shm, size, 0, 0, pmap->width, pmap->height, putpixel_pixmap, (void *) &pm);
  1019.    
  1020.     return pm;
  1021. }
  1022.  
  1023.  
  1024. /** Handle shared memory communication calls
  1025.  *
  1026.  * Protocol for drawing pixmaps:
  1027.  * - FB_PREPARE_SHM(client shm identification)
  1028.  * - IPC_M_AS_AREA_SEND
  1029.  * - FB_DRAW_PPM(startx, starty)
  1030.  * - FB_DROP_SHM
  1031.  *
  1032.  * Protocol for text drawing
  1033.  * - IPC_M_AS_AREA_SEND
  1034.  * - FB_DRAW_TEXT_DATA
  1035.  *
  1036.  * @param callid Callid of the current call
  1037.  * @param call   Current call data
  1038.  * @param vp     Active viewport
  1039.  *
  1040.  * @return false if the call was not handled byt this function, true otherwise
  1041.  *
  1042.  * Note: this function is not thread-safe, you would have
  1043.  * to redefine static variables with fibril_local.
  1044.  *
  1045.  */
  1046. static bool shm_handle(ipc_callid_t callid, ipc_call_t *call, int vp)
  1047. {
  1048.     static keyfield_t *interbuffer = NULL;
  1049.     static size_t intersize = 0;
  1050.    
  1051.     static unsigned char *shm = NULL;
  1052.     static ipcarg_t shm_id = 0;
  1053.     static size_t shm_size;
  1054.    
  1055.     bool handled = true;
  1056.     int retval = EOK;
  1057.     viewport_t *vport = &viewports[vp];
  1058.     unsigned int x;
  1059.     unsigned int y;
  1060.     unsigned int w;
  1061.     unsigned int h;
  1062.    
  1063.     switch (IPC_GET_METHOD(*call)) {
  1064.     case IPC_M_SHARE_OUT:
  1065.         /* We accept one area for data interchange */
  1066.         if (IPC_GET_ARG1(*call) == shm_id) {
  1067.             void *dest = as_get_mappable_page(IPC_GET_ARG2(*call));
  1068.             shm_size = IPC_GET_ARG2(*call);
  1069.             if (!ipc_answer_1(callid, EOK, (sysarg_t) dest))
  1070.                 shm = dest;
  1071.             else
  1072.                 shm_id = 0;
  1073.            
  1074.             if (shm[0] != 'P')
  1075.                 return false;
  1076.            
  1077.             return true;
  1078.         } else {
  1079.             intersize = IPC_GET_ARG2(*call);
  1080.             receive_comm_area(callid, call, (void *) &interbuffer);
  1081.         }
  1082.         return true;
  1083.     case FB_PREPARE_SHM:
  1084.         if (shm_id)
  1085.             retval = EBUSY;
  1086.         else
  1087.             shm_id = IPC_GET_ARG1(*call);
  1088.         break;
  1089.        
  1090.     case FB_DROP_SHM:
  1091.         if (shm) {
  1092.             as_area_destroy(shm);
  1093.             shm = NULL;
  1094.         }
  1095.         shm_id = 0;
  1096.         break;
  1097.        
  1098.     case FB_SHM2PIXMAP:
  1099.         if (!shm) {
  1100.             retval = EINVAL;
  1101.             break;
  1102.         }
  1103.         retval = shm2pixmap(shm, shm_size);
  1104.         break;
  1105.     case FB_DRAW_PPM:
  1106.         if (!shm) {
  1107.             retval = EINVAL;
  1108.             break;
  1109.         }
  1110.         x = IPC_GET_ARG1(*call);
  1111.         y = IPC_GET_ARG2(*call);
  1112.        
  1113.         if ((x > vport->width) || (y > vport->height)) {
  1114.             retval = EINVAL;
  1115.             break;
  1116.         }
  1117.        
  1118.         ppm_draw(shm, shm_size, IPC_GET_ARG1(*call),
  1119.             IPC_GET_ARG2(*call), vport->width - x, vport->height - y, putpixel, (void *) vport);
  1120.         break;
  1121.     case FB_DRAW_TEXT_DATA:
  1122.         x = IPC_GET_ARG1(*call);
  1123.         y = IPC_GET_ARG2(*call);
  1124.         w = IPC_GET_ARG3(*call);
  1125.         h = IPC_GET_ARG4(*call);
  1126.         if (!interbuffer) {
  1127.             retval = EINVAL;
  1128.             break;
  1129.         }
  1130.         if (x + w > vport->cols || y + h > vport->rows) {
  1131.             retval = EINVAL;
  1132.             break;
  1133.         }
  1134.         if (intersize < w * h * sizeof(*interbuffer)) {
  1135.             retval = EINVAL;
  1136.             break;
  1137.         }
  1138.         draw_text_data(vport, interbuffer, x, y, w, h);
  1139.         break;
  1140.     default:
  1141.         handled = false;
  1142.     }
  1143.    
  1144.     if (handled)
  1145.         ipc_answer_0(callid, retval);
  1146.     return handled;
  1147. }
  1148.  
  1149.  
  1150. static void copy_vp_to_pixmap(viewport_t *vport, pixmap_t *pmap)
  1151. {
  1152.     unsigned int width = vport->width;
  1153.     unsigned int height = vport->height;
  1154.    
  1155.     if (width + vport->x > screen.xres)
  1156.         width = screen.xres - vport->x;
  1157.     if (height + vport->y > screen.yres)
  1158.         height = screen.yres - vport->y;
  1159.    
  1160.     unsigned int realwidth = pmap->width <= width ? pmap->width : width;
  1161.     unsigned int realheight = pmap->height <= height ? pmap->height : height;
  1162.    
  1163.     unsigned int srcrowsize = vport->width * screen.pixelbytes;
  1164.     unsigned int realrowsize = realwidth * screen.pixelbytes;
  1165.    
  1166.     unsigned int y;
  1167.     for (y = 0; y < realheight; y++) {
  1168.         unsigned int tmp = (vport->y + y) * screen.scanline + vport->x * screen.pixelbytes;
  1169.         memcpy(pmap->data + srcrowsize * y, screen.fb_addr + tmp, realrowsize);
  1170.     }
  1171. }
  1172.  
  1173.  
  1174. /** Save viewport to pixmap
  1175.  *
  1176.  */
  1177. static int save_vp_to_pixmap(viewport_t *vport)
  1178. {
  1179.     int pm;
  1180.     pixmap_t *pmap;
  1181.    
  1182.     pm = find_free_pixmap();
  1183.     if (pm == -1)
  1184.         return ELIMIT;
  1185.    
  1186.     pmap = &pixmaps[pm];
  1187.     pmap->data = malloc(screen.pixelbytes * vport->width * vport->height);
  1188.     if (!pmap->data)
  1189.         return ENOMEM;
  1190.    
  1191.     pmap->width = vport->width;
  1192.     pmap->height = vport->height;
  1193.    
  1194.     copy_vp_to_pixmap(vport, pmap);
  1195.    
  1196.     return pm;
  1197. }
  1198.  
  1199.  
  1200. /** Draw pixmap on screen
  1201.  *
  1202.  * @param vp Viewport to draw on
  1203.  * @param pm Pixmap identifier
  1204.  *
  1205.  */
  1206. static int draw_pixmap(int vp, int pm)
  1207. {
  1208.     pixmap_t *pmap = &pixmaps[pm];
  1209.     viewport_t *vport = &viewports[vp];
  1210.    
  1211.     unsigned int width = vport->width;
  1212.     unsigned int height = vport->height;
  1213.    
  1214.     if (width + vport->x > screen.xres)
  1215.         width = screen.xres - vport->x;
  1216.     if (height + vport->y > screen.yres)
  1217.         height = screen.yres - vport->y;
  1218.    
  1219.     if (!pmap->data)
  1220.         return EINVAL;
  1221.    
  1222.     unsigned int realwidth = pmap->width <= width ? pmap->width : width;
  1223.     unsigned int realheight = pmap->height <= height ? pmap->height : height;
  1224.    
  1225.     unsigned int srcrowsize = vport->width * screen.pixelbytes;
  1226.     unsigned int realrowsize = realwidth * screen.pixelbytes;
  1227.    
  1228.     unsigned int y;
  1229.     for (y = 0; y < realheight; y++) {
  1230.         unsigned int tmp = (vport->y + y) * screen.scanline + vport->x * screen.pixelbytes;
  1231.         memcpy(screen.fb_addr + tmp, pmap->data + y * srcrowsize, realrowsize);
  1232.     }
  1233.    
  1234.     return EOK;
  1235. }
  1236.  
  1237.  
  1238. /** Tick animation one step forward
  1239.  *
  1240.  */
  1241. static void anims_tick(void)
  1242. {
  1243.     unsigned int i;
  1244.     static int counts = 0;
  1245.    
  1246.     /* Limit redrawing */
  1247.     counts = (counts + 1) % 8;
  1248.     if (counts)
  1249.         return;
  1250.    
  1251.     for (i = 0; i < MAX_ANIMATIONS; i++) {
  1252.         if ((!animations[i].animlen) || (!animations[i].initialized) ||
  1253.             (!animations[i].enabled))
  1254.             continue;
  1255.        
  1256.         draw_pixmap(animations[i].vp, animations[i].pixmaps[animations[i].pos]);
  1257.         animations[i].pos = (animations[i].pos + 1) % animations[i].animlen;
  1258.     }
  1259. }
  1260.  
  1261.  
  1262. static unsigned int pointer_x;
  1263. static unsigned int pointer_y;
  1264. static bool pointer_shown, pointer_enabled;
  1265. static int pointer_vport = -1;
  1266. static int pointer_pixmap = -1;
  1267.  
  1268.  
  1269. static void mouse_show(void)
  1270. {
  1271.     int i, j;
  1272.     int visibility;
  1273.     int color;
  1274.     int bytepos;
  1275.    
  1276.     if ((pointer_shown) || (!pointer_enabled))
  1277.         return;
  1278.    
  1279.     /* Save image under the pointer. */
  1280.     if (pointer_vport == -1) {
  1281.         pointer_vport = vport_create(pointer_x, pointer_y, pointer_width, pointer_height);
  1282.         if (pointer_vport < 0)
  1283.             return;
  1284.     } else {
  1285.         viewports[pointer_vport].x = pointer_x;
  1286.         viewports[pointer_vport].y = pointer_y;
  1287.     }
  1288.    
  1289.     if (pointer_pixmap == -1)
  1290.         pointer_pixmap = save_vp_to_pixmap(&viewports[pointer_vport]);
  1291.     else
  1292.         copy_vp_to_pixmap(&viewports[pointer_vport], &pixmaps[pointer_pixmap]);
  1293.    
  1294.     /* Draw mouse pointer. */
  1295.     for (i = 0; i < pointer_height; i++)
  1296.         for (j = 0; j < pointer_width; j++) {
  1297.             bytepos = i * ((pointer_width - 1) / 8 + 1) + j / 8;
  1298.             visibility = pointer_mask_bits[bytepos] &
  1299.                 (1 << (j % 8));
  1300.             if (visibility) {
  1301.                 color = pointer_bits[bytepos] &
  1302.                     (1 << (j % 8)) ? 0 : 0xffffff;
  1303.                 if (pointer_x + j < screen.xres && pointer_y +
  1304.                     i < screen.yres)
  1305.                     putpixel(&viewports[0], pointer_x + j,
  1306.                         pointer_y + i, color);
  1307.             }
  1308.         }
  1309.     pointer_shown = 1;
  1310. }
  1311.  
  1312.  
  1313. static void mouse_hide(void)
  1314. {
  1315.     /* Restore image under the pointer. */
  1316.     if (pointer_shown) {
  1317.         draw_pixmap(pointer_vport, pointer_pixmap);
  1318.         pointer_shown = 0;
  1319.     }
  1320. }
  1321.  
  1322.  
  1323. static void mouse_move(unsigned int x, unsigned int y)
  1324. {
  1325.     mouse_hide();
  1326.     pointer_x = x;
  1327.     pointer_y = y;
  1328.     mouse_show();
  1329. }
  1330.  
  1331.  
  1332. static int anim_handle(ipc_callid_t callid, ipc_call_t *call, int vp)
  1333. {
  1334.     bool handled = true;
  1335.     int retval = EOK;
  1336.     int i, nvp;
  1337.     int newval;
  1338.    
  1339.     switch (IPC_GET_METHOD(*call)) {
  1340.     case FB_ANIM_CREATE:
  1341.         nvp = IPC_GET_ARG1(*call);
  1342.         if (nvp == -1)
  1343.             nvp = vp;
  1344.         if (nvp >= MAX_VIEWPORTS || nvp < 0 ||
  1345.             !viewports[nvp].initialized) {
  1346.             retval = EINVAL;
  1347.             break;
  1348.         }
  1349.         for (i = 0; i < MAX_ANIMATIONS; i++) {
  1350.             if (!animations[i].initialized)
  1351.                 break;
  1352.         }
  1353.         if (i == MAX_ANIMATIONS) {
  1354.             retval = ELIMIT;
  1355.             break;
  1356.         }
  1357.         animations[i].initialized = 1;
  1358.         animations[i].animlen = 0;
  1359.         animations[i].pos = 0;
  1360.         animations[i].enabled = 0;
  1361.         animations[i].vp = nvp;
  1362.         retval = i;
  1363.         break;
  1364.     case FB_ANIM_DROP:
  1365.         i = IPC_GET_ARG1(*call);
  1366.         if (i >= MAX_ANIMATIONS || i < 0) {
  1367.             retval = EINVAL;
  1368.             break;
  1369.         }
  1370.         animations[i].initialized = 0;
  1371.         break;
  1372.     case FB_ANIM_ADDPIXMAP:
  1373.         i = IPC_GET_ARG1(*call);
  1374.         if (i >= MAX_ANIMATIONS || i < 0 ||
  1375.             !animations[i].initialized) {
  1376.             retval = EINVAL;
  1377.             break;
  1378.         }
  1379.         if (animations[i].animlen == MAX_ANIM_LEN) {
  1380.             retval = ELIMIT;
  1381.             break;
  1382.         }
  1383.         newval = IPC_GET_ARG2(*call);
  1384.         if (newval < 0 || newval > MAX_PIXMAPS ||
  1385.             !pixmaps[newval].data) {
  1386.             retval = EINVAL;
  1387.             break;
  1388.         }
  1389.         animations[i].pixmaps[animations[i].animlen++] = newval;
  1390.         break;
  1391.     case FB_ANIM_CHGVP:
  1392.         i = IPC_GET_ARG1(*call);
  1393.         if (i >= MAX_ANIMATIONS || i < 0) {
  1394.             retval = EINVAL;
  1395.             break;
  1396.         }
  1397.         nvp = IPC_GET_ARG2(*call);
  1398.         if (nvp == -1)
  1399.             nvp = vp;
  1400.         if (nvp >= MAX_VIEWPORTS || nvp < 0 ||
  1401.             !viewports[nvp].initialized) {
  1402.             retval = EINVAL;
  1403.             break;
  1404.         }
  1405.         animations[i].vp = nvp;
  1406.         break;
  1407.     case FB_ANIM_START:
  1408.     case FB_ANIM_STOP:
  1409.         i = IPC_GET_ARG1(*call);
  1410.         if (i >= MAX_ANIMATIONS || i < 0) {
  1411.             retval = EINVAL;
  1412.             break;
  1413.         }
  1414.         newval = (IPC_GET_METHOD(*call) == FB_ANIM_START);
  1415.         if (newval ^ animations[i].enabled) {
  1416.             animations[i].enabled = newval;
  1417.             anims_enabled += newval ? 1 : -1;
  1418.         }
  1419.         break;
  1420.     default:
  1421.         handled = 0;
  1422.     }
  1423.     if (handled)
  1424.         ipc_answer_0(callid, retval);
  1425.     return handled;
  1426. }
  1427.  
  1428.  
  1429. /** Handler for messages concerning pixmap handling
  1430.  *
  1431.  */
  1432. static int pixmap_handle(ipc_callid_t callid, ipc_call_t *call, int vp)
  1433. {
  1434.     bool handled = true;
  1435.     int retval = EOK;
  1436.     int i, nvp;
  1437.    
  1438.     switch (IPC_GET_METHOD(*call)) {
  1439.     case FB_VP_DRAW_PIXMAP:
  1440.         nvp = IPC_GET_ARG1(*call);
  1441.         if (nvp == -1)
  1442.             nvp = vp;
  1443.         if (nvp < 0 || nvp >= MAX_VIEWPORTS ||
  1444.             !viewports[nvp].initialized) {
  1445.             retval = EINVAL;
  1446.             break;
  1447.         }
  1448.         i = IPC_GET_ARG2(*call);
  1449.         retval = draw_pixmap(nvp, i);
  1450.         break;
  1451.     case FB_VP2PIXMAP:
  1452.         nvp = IPC_GET_ARG1(*call);
  1453.         if (nvp == -1)
  1454.             nvp = vp;
  1455.         if (nvp < 0 || nvp >= MAX_VIEWPORTS ||
  1456.             !viewports[nvp].initialized)
  1457.             retval = EINVAL;
  1458.         else
  1459.             retval = save_vp_to_pixmap(&viewports[nvp]);
  1460.         break;
  1461.     case FB_DROP_PIXMAP:
  1462.         i = IPC_GET_ARG1(*call);
  1463.         if (i >= MAX_PIXMAPS) {
  1464.             retval = EINVAL;
  1465.             break;
  1466.         }
  1467.         if (pixmaps[i].data) {
  1468.             free(pixmaps[i].data);
  1469.             pixmaps[i].data = NULL;
  1470.         }
  1471.         break;
  1472.     default:
  1473.         handled = 0;
  1474.     }
  1475.    
  1476.     if (handled)
  1477.         ipc_answer_0(callid, retval);
  1478.     return handled;
  1479.    
  1480. }
  1481.  
  1482. static int rgb_from_style(attr_rgb_t *rgb, int style)
  1483. {
  1484.     switch (style) {
  1485.     case STYLE_NORMAL:
  1486.         rgb->fg_color = color_table[COLOR_BLACK];
  1487.         rgb->bg_color = color_table[COLOR_WHITE];
  1488.         break;
  1489.     case STYLE_EMPHASIS:
  1490.         rgb->fg_color = color_table[COLOR_RED];
  1491.         rgb->bg_color = color_table[COLOR_WHITE];
  1492.         break;
  1493.     default:
  1494.         return EINVAL;
  1495.     }
  1496.  
  1497.     return EOK;
  1498. }
  1499.  
  1500. static int rgb_from_idx(attr_rgb_t *rgb, ipcarg_t fg_color,
  1501.     ipcarg_t bg_color, ipcarg_t flags)
  1502. {
  1503.     fg_color = (fg_color & 7) | ((flags & CATTR_BRIGHT) ? 8 : 0);
  1504.     bg_color = (bg_color & 7) | ((flags & CATTR_BRIGHT) ? 8 : 0);
  1505.  
  1506.     rgb->fg_color = color_table[fg_color];
  1507.     rgb->bg_color = color_table[bg_color];
  1508.  
  1509.     return EOK;
  1510. }
  1511.  
  1512. static int rgb_from_attr(attr_rgb_t *rgb, const attrs_t *a)
  1513. {
  1514.     int rc;
  1515.  
  1516.     switch (a->t) {
  1517.     case at_style:
  1518.         rc = rgb_from_style(rgb, a->a.s.style);
  1519.         break;
  1520.     case at_idx:
  1521.         rc = rgb_from_idx(rgb, a->a.i.fg_color,
  1522.             a->a.i.bg_color, a->a.i.flags);
  1523.         break;
  1524.     case at_rgb:
  1525.         *rgb = a->a.r;
  1526.         rc = EOK;
  1527.         break;
  1528.     }
  1529.  
  1530.     return rc;
  1531. }
  1532.  
  1533. static int fb_set_style(viewport_t *vport, ipcarg_t style)
  1534. {
  1535.     return rgb_from_style(&vport->attr, (int) style);
  1536. }
  1537.  
  1538. static int fb_set_color(viewport_t *vport, ipcarg_t fg_color,
  1539.     ipcarg_t bg_color, ipcarg_t flags)
  1540. {
  1541.     return rgb_from_idx(&vport->attr, fg_color, bg_color, flags);
  1542. }
  1543.  
  1544. /** Function for handling connections to FB
  1545.  *
  1546.  */
  1547. static void fb_client_connection(ipc_callid_t iid, ipc_call_t *icall)
  1548. {
  1549.     unsigned int vp = 0;
  1550.     viewport_t *vport = &viewports[vp];
  1551.    
  1552.     if (client_connected) {
  1553.         ipc_answer_0(iid, ELIMIT);
  1554.         return;
  1555.     }
  1556.    
  1557.     /* Accept connection */
  1558.     client_connected = true;
  1559.     ipc_answer_0(iid, EOK);
  1560.    
  1561.     while (true) {
  1562.         ipc_callid_t callid;
  1563.         ipc_call_t call;
  1564.         int retval;
  1565.         unsigned int i;
  1566.         int scroll;
  1567.         wchar_t ch;
  1568.         unsigned int col, row;
  1569.        
  1570.         if ((vport->cursor_active) || (anims_enabled))
  1571.             callid = async_get_call_timeout(&call, 250000);
  1572.         else
  1573.             callid = async_get_call(&call);
  1574.        
  1575.         mouse_hide();
  1576.         if (!callid) {
  1577.             cursor_blink(vport);
  1578.             anims_tick();
  1579.             mouse_show();
  1580.             continue;
  1581.         }
  1582.        
  1583.         if (shm_handle(callid, &call, vp))
  1584.             continue;
  1585.        
  1586.         if (pixmap_handle(callid, &call, vp))
  1587.             continue;
  1588.        
  1589.         if (anim_handle(callid, &call, vp))
  1590.             continue;
  1591.        
  1592.         switch (IPC_GET_METHOD(call)) {
  1593.         case IPC_M_PHONE_HUNGUP:
  1594.             client_connected = false;
  1595.            
  1596.             /* Cleanup other viewports */
  1597.             for (i = 1; i < MAX_VIEWPORTS; i++)
  1598.                 vport->initialized = false;
  1599.            
  1600.             /* Exit thread */
  1601.             return;
  1602.        
  1603.         case FB_PUTCHAR:
  1604.             ch = IPC_GET_ARG1(call);
  1605.             col = IPC_GET_ARG2(call);
  1606.             row = IPC_GET_ARG3(call);
  1607.            
  1608.             if ((col >= vport->cols) || (row >= vport->rows)) {
  1609.                 retval = EINVAL;
  1610.                 break;
  1611.             }
  1612.             ipc_answer_0(callid, EOK);
  1613.            
  1614.             draw_char(vport, ch, col, row);
  1615.            
  1616.             /* Message already answered */
  1617.             continue;
  1618.         case FB_CLEAR:
  1619.             vport_clear(vport);
  1620.             cursor_show(vport);
  1621.             retval = EOK;
  1622.             break;
  1623.         case FB_CURSOR_GOTO:
  1624.             col = IPC_GET_ARG1(call);
  1625.             row = IPC_GET_ARG2(call);
  1626.            
  1627.             if ((col >= vport->cols) || (row >= vport->rows)) {
  1628.                 retval = EINVAL;
  1629.                 break;
  1630.             }
  1631.             retval = EOK;
  1632.            
  1633.             cursor_hide(vport);
  1634.             vport->cur_col = col;
  1635.             vport->cur_row = row;
  1636.             cursor_show(vport);
  1637.             break;
  1638.         case FB_CURSOR_VISIBILITY:
  1639.             cursor_hide(vport);
  1640.             vport->cursor_active = IPC_GET_ARG1(call);
  1641.             cursor_show(vport);
  1642.             retval = EOK;
  1643.             break;
  1644.         case FB_GET_CSIZE:
  1645.             ipc_answer_2(callid, EOK, vport->cols, vport->rows);
  1646.             continue;
  1647.         case FB_SCROLL:
  1648.             scroll = IPC_GET_ARG1(call);
  1649.             if ((scroll > (int) vport->rows) || (scroll < (-(int) vport->rows))) {
  1650.                 retval = EINVAL;
  1651.                 break;
  1652.             }
  1653.             cursor_hide(vport);
  1654.             vport_scroll(vport, scroll);
  1655.             cursor_show(vport);
  1656.             retval = EOK;
  1657.             break;
  1658.         case FB_VIEWPORT_SWITCH:
  1659.             i = IPC_GET_ARG1(call);
  1660.             if (i >= MAX_VIEWPORTS) {
  1661.                 retval = EINVAL;
  1662.                 break;
  1663.             }
  1664.             if (!viewports[i].initialized) {
  1665.                 retval = EADDRNOTAVAIL;
  1666.                 break;
  1667.             }
  1668.             cursor_hide(vport);
  1669.             vp = i;
  1670.             vport = &viewports[vp];
  1671.             cursor_show(vport);
  1672.             retval = EOK;
  1673.             break;
  1674.         case FB_VIEWPORT_CREATE:
  1675.             retval = vport_create(IPC_GET_ARG1(call) >> 16,
  1676.                 IPC_GET_ARG1(call) & 0xffff,
  1677.                 IPC_GET_ARG2(call) >> 16,
  1678.                 IPC_GET_ARG2(call) & 0xffff);
  1679.             break;
  1680.         case FB_VIEWPORT_DELETE:
  1681.             i = IPC_GET_ARG1(call);
  1682.             if (i >= MAX_VIEWPORTS) {
  1683.                 retval = EINVAL;
  1684.                 break;
  1685.             }
  1686.             if (!viewports[i].initialized) {
  1687.                 retval = EADDRNOTAVAIL;
  1688.                 break;
  1689.             }
  1690.             viewports[i].initialized = false;
  1691.             if (viewports[i].bgpixel)
  1692.                 free(viewports[i].bgpixel);
  1693.             if (viewports[i].backbuf)
  1694.                 free(viewports[i].backbuf);
  1695.             retval = EOK;
  1696.             break;
  1697.         case FB_SET_STYLE:
  1698.             retval = fb_set_style(vport, IPC_GET_ARG1(call));
  1699.             break;
  1700.         case FB_SET_COLOR:
  1701.             retval = fb_set_color(vport, IPC_GET_ARG1(call),
  1702.                 IPC_GET_ARG2(call), IPC_GET_ARG3(call));
  1703.             break;
  1704.         case FB_SET_RGB_COLOR:
  1705.             vport->attr.fg_color = IPC_GET_ARG1(call);
  1706.             vport->attr.bg_color = IPC_GET_ARG2(call);
  1707.             retval = EOK;
  1708.             break;
  1709.         case FB_GET_RESOLUTION:
  1710.             ipc_answer_2(callid, EOK, screen.xres, screen.yres);
  1711.             continue;
  1712.         case FB_POINTER_MOVE:
  1713.             pointer_enabled = true;
  1714.             mouse_move(IPC_GET_ARG1(call), IPC_GET_ARG2(call));
  1715.             retval = EOK;
  1716.             break;
  1717.         case FB_SCREEN_YIELD:
  1718.         case FB_SCREEN_RECLAIM:
  1719.             retval = EOK;
  1720.             break;
  1721.         default:
  1722.             retval = ENOENT;
  1723.         }
  1724.         ipc_answer_0(callid, retval);
  1725.     }
  1726. }
  1727.  
  1728. /** Initialization of framebuffer
  1729.  *
  1730.  */
  1731. int fb_init(void)
  1732. {
  1733.     async_set_client_connection(fb_client_connection);
  1734.    
  1735.     void *fb_ph_addr = (void *) sysinfo_value("fb.address.physical");
  1736.     unsigned int fb_offset = sysinfo_value("fb.offset");
  1737.     unsigned int fb_width = sysinfo_value("fb.width");
  1738.     unsigned int fb_height = sysinfo_value("fb.height");
  1739.     unsigned int fb_scanline = sysinfo_value("fb.scanline");
  1740.     unsigned int fb_visual = sysinfo_value("fb.visual");
  1741.    
  1742.     unsigned int fbsize = fb_scanline * fb_height;
  1743.     void *fb_addr = as_get_mappable_page(fbsize);
  1744.    
  1745.     if (physmem_map(fb_ph_addr + fb_offset, fb_addr,
  1746.         ALIGN_UP(fbsize, PAGE_SIZE) >> PAGE_WIDTH, AS_AREA_READ | AS_AREA_WRITE) != 0)
  1747.         return -1;
  1748.    
  1749.     if (screen_init(fb_addr, fb_width, fb_height, fb_scanline, fb_visual))
  1750.         return 0;
  1751.    
  1752.     return -1;
  1753. }
  1754.  
  1755. /**
  1756.  * @}
  1757.  */
  1758.