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  1. /*
  2.  * Copyright (c) 2008 Martin Decky
  3.  * Copyright (c) 2006 Jakub Vana
  4.  * Copyright (c) 2006 Ondrej Palkovsky
  5.  * All rights reserved.
  6.  *
  7.  * Redistribution and use in source and binary forms, with or without
  8.  * modification, are permitted provided that the following conditions
  9.  * are met:
  10.  *
  11.  * - Redistributions of source code must retain the above copyright
  12.  *   notice, this list of conditions and the following disclaimer.
  13.  * - Redistributions in binary form must reproduce the above copyright
  14.  *   notice, this list of conditions and the following disclaimer in the
  15.  *   documentation and/or other materials provided with the distribution.
  16.  * - The name of the author may not be used to endorse or promote products
  17.  *   derived from this software without specific prior written permission.
  18.  *
  19.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  20.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  21.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  22.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  23.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  24.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  25.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  26.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  27.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  28.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  29.  */
  30.  
  31. /**
  32.  * @defgroup fb Graphical framebuffer
  33.  * @brief   HelenOS graphical framebuffer.
  34.  * @ingroup fbs
  35.  * @{
  36.  */
  37.  
  38. /** @file
  39.  */
  40.  
  41. #include <stdlib.h>
  42. #include <unistd.h>
  43. #include <string.h>
  44. #include <ddi.h>
  45. #include <sysinfo.h>
  46. #include <align.h>
  47. #include <as.h>
  48. #include <ipc/fb.h>
  49. #include <ipc/ipc.h>
  50. #include <ipc/ns.h>
  51. #include <ipc/services.h>
  52. #include <kernel/errno.h>
  53. #include <kernel/genarch/fb/visuals.h>
  54. #include <console/color.h>
  55. #include <console/style.h>
  56. #include <async.h>
  57. #include <bool.h>
  58.  
  59. #include "font-8x16.h"
  60. #include "fb.h"
  61. #include "main.h"
  62. #include "../console/screenbuffer.h"
  63. #include "ppm.h"
  64.  
  65. #include "pointer.xbm"
  66. #include "pointer_mask.xbm"
  67.  
  68. #define DEFAULT_BGCOLOR  0xf0f0f0
  69. #define DEFAULT_FGCOLOR  0x000000
  70.  
  71. #define MAX_ANIM_LEN     8
  72. #define MAX_ANIMATIONS   4
  73. #define MAX_PIXMAPS      256  /**< Maximum number of saved pixmaps */
  74. #define MAX_VIEWPORTS    128  /**< Viewport is a rectangular area on the screen */
  75.  
  76. /** Function to render a pixel from a RGB value. */
  77. typedef void (*rgb_conv_t)(void *, uint32_t);
  78.  
  79. /** Function to draw a glyph. */
  80. typedef void (*dg_t)(unsigned int x, unsigned int y, bool cursor,
  81.     uint8_t *glyphs, uint8_t glyph, uint32_t fg_color, uint32_t bg_color);
  82.  
  83. struct {
  84.     uint8_t *fb_addr;
  85.    
  86.     unsigned int xres;
  87.     unsigned int yres;
  88.    
  89.     unsigned int scanline;
  90.     unsigned int glyphscanline;
  91.    
  92.     unsigned int pixelbytes;
  93.     unsigned int glyphbytes;
  94.    
  95.     rgb_conv_t rgb_conv;
  96. } screen;
  97.  
  98. /** Backbuffer character cell. */
  99. typedef struct {
  100.     uint8_t glyph;
  101.     uint32_t fg_color;
  102.     uint32_t bg_color;
  103. } bb_cell_t;
  104.  
  105. typedef struct {
  106.     bool initialized;
  107.     unsigned int x;
  108.     unsigned int y;
  109.     unsigned int width;
  110.     unsigned int height;
  111.    
  112.     /* Text support in window */
  113.     unsigned int cols;
  114.     unsigned int rows;
  115.    
  116.     /*
  117.      * Style and glyphs for text printing
  118.      */
  119.  
  120.     /** Current attributes. */
  121.     attr_rgb_t attr;
  122.  
  123.     /** Pre-rendered mask for rendering glyphs. Different viewports
  124.      * might use different drawing functions depending on whether their
  125.      * scanlines are aligned on a word boundary.*/
  126.     uint8_t *glyphs;
  127.  
  128.     uint8_t *bgpixel;
  129.  
  130.     /** Glyph drawing function for this viewport. */
  131.     dg_t dglyph;
  132.    
  133.     /* Auto-cursor position */
  134.     bool cursor_active;
  135.     unsigned int cur_col;
  136.     unsigned int cur_row;
  137.     bool cursor_shown;
  138.    
  139.     /* Back buffer */
  140.     bb_cell_t *backbuf;
  141.     unsigned int bbsize;
  142.     bool bb_invalid;
  143. } viewport_t;
  144.  
  145. typedef struct {
  146.     bool initialized;
  147.     bool enabled;
  148.     unsigned int vp;
  149.    
  150.     unsigned int pos;
  151.     unsigned int animlen;
  152.     unsigned int pixmaps[MAX_ANIM_LEN];
  153. } animation_t;
  154.  
  155. static animation_t animations[MAX_ANIMATIONS];
  156. static bool anims_enabled;
  157.  
  158. typedef struct {
  159.     unsigned int width;
  160.     unsigned int height;
  161.     uint8_t *data;
  162. } pixmap_t;
  163.  
  164. static pixmap_t pixmaps[MAX_PIXMAPS];
  165. static viewport_t viewports[128];
  166.  
  167. static bool client_connected = false;  /**< Allow only 1 connection */
  168.  
  169. static uint32_t color_table[16] = {
  170.     [COLOR_BLACK]       = 0x000000,
  171.     [COLOR_BLUE]        = 0x0000f0,
  172.     [COLOR_GREEN]       = 0x00f000,
  173.     [COLOR_CYAN]        = 0x00f0f0,
  174.     [COLOR_RED]     = 0xf00000,
  175.     [COLOR_MAGENTA]     = 0xf000f0,
  176.     [COLOR_YELLOW]      = 0xf0f000,
  177.     [COLOR_WHITE]       = 0xf0f0f0,
  178.  
  179.     [8 + COLOR_BLACK]   = 0x000000,
  180.     [8 + COLOR_BLUE]    = 0x0000ff,
  181.     [8 + COLOR_GREEN]   = 0x00ff00,
  182.     [8 + COLOR_CYAN]    = 0x00ffff,
  183.     [8 + COLOR_RED]     = 0xff0000,
  184.     [8 + COLOR_MAGENTA] = 0xff00ff,
  185.     [8 + COLOR_YELLOW]  = 0xffff00,
  186.     [8 + COLOR_WHITE]   = 0xffffff,
  187. };
  188.  
  189. static int rgb_from_attr(attr_rgb_t *rgb, const attrs_t *a);
  190. static int rgb_from_style(attr_rgb_t *rgb, int style);
  191. static int rgb_from_idx(attr_rgb_t *rgb, ipcarg_t fg_color,
  192.     ipcarg_t bg_color, ipcarg_t flags);
  193.  
  194. static int fb_set_color(viewport_t *vport, ipcarg_t fg_color,
  195.     ipcarg_t bg_color, ipcarg_t attr);
  196.  
  197. static void draw_glyph_aligned(unsigned int x, unsigned int y, bool cursor,
  198.     uint8_t *glyphs, uint8_t glyph, uint32_t fg_color, uint32_t bg_color);
  199. static void draw_glyph_fallback(unsigned int x, unsigned int y, bool cursor,
  200.     uint8_t *glyphs, uint8_t glyph, uint32_t fg_color, uint32_t bg_color);
  201.  
  202. static void draw_vp_glyph(viewport_t *vport, bool cursor, unsigned int col,
  203.     unsigned int row);
  204.  
  205.  
  206. #define RED(x, bits)                 ((x >> (8 + 8 + 8 - bits)) & ((1 << bits) - 1))
  207. #define GREEN(x, bits)               ((x >> (8 + 8 - bits)) & ((1 << bits) - 1))
  208. #define BLUE(x, bits)                ((x >> (8 - bits)) & ((1 << bits) - 1))
  209.  
  210. #define COL2X(col)                   ((col) * FONT_WIDTH)
  211. #define ROW2Y(row)                   ((row) * FONT_SCANLINES)
  212.  
  213. #define X2COL(x)                     ((x) / FONT_WIDTH)
  214. #define Y2ROW(y)                     ((y) / FONT_SCANLINES)
  215.  
  216. #define FB_POS(x, y)                 ((y) * screen.scanline + (x) * screen.pixelbytes)
  217. #define BB_POS(vport, col, row)      ((row) * vport->cols + (col))
  218. #define GLYPH_POS(glyph, y, cursor)  (((glyph) + (cursor) * FONT_GLYPHS) * screen.glyphbytes + (y) * screen.glyphscanline)
  219.  
  220.  
  221. /** ARGB 8:8:8:8 conversion
  222.  *
  223.  */
  224. static void rgb_0888(void *dst, uint32_t rgb)
  225. {
  226.     *((uint32_t *) dst) = rgb & 0xffffff;
  227. }
  228.  
  229.  
  230. /** ABGR 8:8:8:8 conversion
  231.  *
  232.  */
  233. static void bgr_0888(void *dst, uint32_t rgb)
  234. {
  235.     *((uint32_t *) dst)
  236.         = (BLUE(rgb, 8) << 16) | (GREEN(rgb, 8) << 8) | RED(rgb, 8);
  237. }
  238.  
  239.  
  240. /** BGR 8:8:8 conversion
  241.  *
  242.  */
  243. static void rgb_888(void *dst, uint32_t rgb)
  244. {
  245. #if defined(FB_INVERT_ENDIAN)
  246.     ((uint8_t *) dst)[0] = RED(rgb, 8);
  247.     ((uint8_t *) dst)[1] = GREEN(rgb, 8);
  248.     ((uint8_t *) dst)[2] = BLUE(rgb, 8);
  249. #else
  250.     ((uint8_t *) dst)[0] = BLUE(rgb, 8);
  251.     ((uint8_t *) dst)[1] = GREEN(rgb, 8);
  252.     ((uint8_t *) dst)[2] = RED(rgb, 8);
  253. #endif
  254. }
  255.  
  256.  
  257. /** RGB 5:5:5 conversion
  258.  *
  259.  */
  260. static void rgb_555(void *dst, uint32_t rgb)
  261. {
  262.     *((uint16_t *) dst)
  263.         = (RED(rgb, 5) << 10) | (GREEN(rgb, 5) << 5) | BLUE(rgb, 5);
  264. }
  265.  
  266.  
  267. /** RGB 5:6:5 conversion
  268.  *
  269.  */
  270. static void rgb_565(void *dst, uint32_t rgb)
  271. {
  272.     *((uint16_t *) dst)
  273.         = (RED(rgb, 5) << 11) | (GREEN(rgb, 6) << 5) | BLUE(rgb, 5);
  274. }
  275.  
  276.  
  277. /** RGB 3:2:3
  278.  *
  279.  */
  280. static void rgb_323(void *dst, uint32_t rgb)
  281. {
  282.     *((uint8_t *) dst)
  283.         = ~((RED(rgb, 3) << 5) | (GREEN(rgb, 2) << 3) | BLUE(rgb, 3));
  284. }
  285.  
  286. /** Draw a filled rectangle.
  287.  *
  288.  * @note Need real implementation that does not access VRAM twice.
  289.  */
  290. static void draw_filled_rect(unsigned int x0, unsigned int y0, unsigned int x1,
  291.     unsigned int y1, uint32_t color)
  292. {
  293.     unsigned int x, y;
  294.     unsigned int copy_bytes;
  295.  
  296.     uint8_t *sp, *dp;
  297.     uint8_t cbuf[4];
  298.  
  299.     if (y0 >= y1 || x0 >= x1) return;
  300.     screen.rgb_conv(cbuf, color);
  301.  
  302.     sp = &screen.fb_addr[FB_POS(x0, y0)];
  303.     dp = sp;
  304.  
  305.     /* Draw the first line. */
  306.     for (x = x0; x < x1; x++) {
  307.         memcpy(dp, cbuf, screen.pixelbytes);
  308.         dp += screen.pixelbytes;
  309.     }
  310.  
  311.     dp = sp + screen.scanline;
  312.     copy_bytes = (x1 - x0) * screen.pixelbytes;
  313.  
  314.     /* Draw the remaining lines by copying. */
  315.     for (y = y0 + 1; y < y1; y++) {
  316.         memcpy(dp, sp, copy_bytes);
  317.         dp += screen.scanline;
  318.     }
  319. }
  320.  
  321. /** Redraw viewport.
  322.  *
  323.  * @param vport Viewport to redraw
  324.  *
  325.  */
  326. static void vport_redraw(viewport_t *vport)
  327. {
  328.     unsigned int row, col;
  329.  
  330.     for (row = 0; row < vport->rows; row++) {
  331.         for (col = 0; col < vport->cols; col++) {
  332.             draw_vp_glyph(vport, false, col, row);
  333.         }
  334.     }
  335.  
  336.     if (COL2X(vport->cols) < vport->width) {
  337.         draw_filled_rect(
  338.             vport->x + COL2X(vport->cols), vport->y,
  339.             vport->x + vport->width, vport->y + vport->height,
  340.             vport->attr.bg_color);
  341.     }
  342.  
  343.     if (ROW2Y(vport->rows) < vport->height) {
  344.         draw_filled_rect(
  345.             vport->x, vport->y + ROW2Y(vport->rows),
  346.             vport->x + vport->width, vport->y + vport->height,
  347.             vport->attr.bg_color);
  348.     }
  349. }
  350.  
  351. static void backbuf_clear(bb_cell_t *backbuf, size_t len, uint32_t fg_color,
  352.     uint32_t bg_color)
  353. {
  354.     unsigned i;
  355.  
  356.     for (i = 0; i < len; i++) {
  357.         backbuf[i].glyph = 0;
  358.         backbuf[i].fg_color = fg_color;
  359.         backbuf[i].bg_color = bg_color;
  360.     }
  361. }
  362.  
  363. /** Clear viewport.
  364.  *
  365.  * @param vport Viewport to clear
  366.  *
  367.  */
  368. static void vport_clear(viewport_t *vport)
  369. {
  370.     backbuf_clear(vport->backbuf, vport->cols * vport->rows,
  371.         vport->attr.fg_color, vport->attr.bg_color);
  372.     vport_redraw(vport);
  373. }
  374.  
  375. /** Scroll viewport by the specified number of lines.
  376.  *
  377.  * @param vport Viewport to scroll
  378.  * @param lines Number of lines to scroll
  379.  *
  380.  */
  381. static void vport_scroll(viewport_t *vport, int lines)
  382. {
  383.     unsigned int row, col;
  384.     unsigned int x, y;
  385.     uint8_t glyph;
  386.     uint32_t fg_color;
  387.     uint32_t bg_color;
  388.     bb_cell_t *bbp, *xbp;
  389.  
  390.     /*
  391.      * Redraw.
  392.      */
  393.  
  394.     y = vport->y;
  395.     for (row = 0; row < vport->rows; row++) {
  396.         x = vport->x;
  397.         for (col = 0; col < vport->cols; col++) {
  398.             if ((row + lines >= 0) && (row + lines < vport->rows)) {
  399.                 xbp = &vport->backbuf[BB_POS(vport, col, row + lines)];
  400.                 bbp = &vport->backbuf[BB_POS(vport, col, row)];
  401.  
  402.                 glyph = xbp->glyph;
  403.                 fg_color = xbp->fg_color;
  404.                 bg_color = xbp->bg_color;
  405.  
  406.                 if (bbp->glyph == glyph &&
  407.                     bbp->fg_color == xbp->fg_color &&
  408.                     bbp->bg_color == xbp->bg_color) {
  409.                     x += FONT_WIDTH;
  410.                     continue;
  411.                 }
  412.             } else {
  413.                 glyph = 0;
  414.                 fg_color = vport->attr.fg_color;
  415.                 bg_color = vport->attr.bg_color;
  416.             }
  417.  
  418.             (*vport->dglyph)(x, y, false, vport->glyphs, glyph,
  419.                 fg_color, bg_color);
  420.             x += FONT_WIDTH;
  421.         }
  422.         y += FONT_SCANLINES;
  423.     }
  424.  
  425.     /*
  426.      * Scroll backbuffer.
  427.      */
  428.  
  429.     if (lines > 0) {
  430.         memmove(vport->backbuf, vport->backbuf + vport->cols * lines,
  431.             vport->cols * (vport->rows - lines) * sizeof(bb_cell_t));
  432.         backbuf_clear(&vport->backbuf[BB_POS(vport, 0, vport->rows - lines)],
  433.             vport->cols * lines, vport->attr.fg_color, vport->attr.bg_color);
  434.     } else {
  435.         memmove(vport->backbuf - vport->cols * lines, vport->backbuf,
  436.             vport->cols * (vport->rows + lines) * sizeof(bb_cell_t));
  437.         backbuf_clear(vport->backbuf, - vport->cols * lines,
  438.             vport->attr.fg_color, vport->attr.bg_color);
  439.     }
  440. }
  441.  
  442. /** Render glyphs
  443.  *
  444.  * Convert glyphs from device independent font
  445.  * description to current visual representation.
  446.  *
  447.  * @param vport Viewport
  448.  *
  449.  */
  450. static void render_glyphs(viewport_t* vport)
  451. {
  452.     unsigned int glyph;
  453.    
  454.     for (glyph = 0; glyph < FONT_GLYPHS; glyph++) {
  455.         unsigned int y;
  456.        
  457.         for (y = 0; y < FONT_SCANLINES; y++) {
  458.             unsigned int x;
  459.            
  460.             for (x = 0; x < FONT_WIDTH; x++) {
  461.                 screen.rgb_conv(&vport->glyphs[GLYPH_POS(glyph, y, false) + x * screen.pixelbytes],
  462.                     (fb_font[glyph * FONT_SCANLINES + y] & (1 << (7 - x)))
  463.                     ? 0xffffff : 0x000000);
  464.                
  465.                 screen.rgb_conv(&vport->glyphs[GLYPH_POS(glyph, y, true) + x * screen.pixelbytes],
  466.                     (fb_font[glyph * FONT_SCANLINES + y] & (1 << (7 - x)))
  467.                     ? 0x000000 : 0xffffff);
  468.             }
  469.         }
  470.     }
  471.    
  472.     screen.rgb_conv(vport->bgpixel, vport->attr.bg_color);
  473. }
  474.  
  475.  
  476. /** Create new viewport
  477.  *
  478.  * @param x      Origin of the viewport (x).
  479.  * @param y      Origin of the viewport (y).
  480.  * @param width  Width of the viewport.
  481.  * @param height Height of the viewport.
  482.  *
  483.  * @return New viewport number.
  484.  *
  485.  */
  486. static int vport_create(unsigned int x, unsigned int y,
  487.     unsigned int width, unsigned int height)
  488. {
  489.     unsigned int i;
  490.    
  491.     for (i = 0; i < MAX_VIEWPORTS; i++) {
  492.         if (!viewports[i].initialized)
  493.             break;
  494.     }
  495.     if (i == MAX_VIEWPORTS)
  496.         return ELIMIT;
  497.    
  498.     unsigned int cols = width / FONT_WIDTH;
  499.     unsigned int rows = height / FONT_SCANLINES;
  500.     unsigned int bbsize = cols * rows * sizeof(bb_cell_t);
  501.     unsigned int glyphsize = 2 * FONT_GLYPHS * screen.glyphbytes;
  502.     unsigned int word_size = sizeof(unsigned long);
  503.    
  504.     bb_cell_t *backbuf = (bb_cell_t *) malloc(bbsize);
  505.     if (!backbuf)
  506.         return ENOMEM;
  507.    
  508.     uint8_t *glyphs = (uint8_t *) malloc(glyphsize);
  509.     if (!glyphs) {
  510.         free(backbuf);
  511.         return ENOMEM;
  512.     }
  513.    
  514.     uint8_t *bgpixel = (uint8_t *) malloc(screen.pixelbytes);
  515.     if (!bgpixel) {
  516.         free(glyphs);
  517.         free(backbuf);
  518.         return ENOMEM;
  519.     }
  520.  
  521.     backbuf_clear(backbuf, cols * rows, DEFAULT_FGCOLOR, DEFAULT_BGCOLOR);
  522.     memset(glyphs, 0, glyphsize);
  523.     memset(bgpixel, 0, screen.pixelbytes);
  524.    
  525.     viewports[i].x = x;
  526.     viewports[i].y = y;
  527.     viewports[i].width = width;
  528.     viewports[i].height = height;
  529.    
  530.     viewports[i].cols = cols;
  531.     viewports[i].rows = rows;
  532.    
  533.     viewports[i].attr.bg_color = DEFAULT_BGCOLOR;
  534.     viewports[i].attr.fg_color = DEFAULT_FGCOLOR;
  535.    
  536.     viewports[i].glyphs = glyphs;
  537.     viewports[i].bgpixel = bgpixel;
  538.  
  539.     /*
  540.      * Conditions necessary  to select aligned version:
  541.      *
  542.      *   - word size is divisible by pixelbytes
  543.      *   - cell scanline size is divisible by word size
  544.      *   - cell scanlines are word-aligned
  545.      */
  546.     if ((word_size % screen.pixelbytes) == 0 &&
  547.         (FONT_WIDTH * screen.pixelbytes) % word_size == 0 &&
  548.         (x * screen.pixelbytes) % word_size == 0 &&
  549.         screen.scanline % word_size == 0) {
  550.  
  551.         viewports[i].dglyph = draw_glyph_aligned;
  552.     } else {
  553.         viewports[i].dglyph = draw_glyph_fallback;
  554.     }
  555.  
  556.     viewports[i].cur_col = 0;
  557.     viewports[i].cur_row = 0;
  558.     viewports[i].cursor_active = false;
  559.     viewports[i].cursor_shown = false;
  560.    
  561.     viewports[i].bbsize = bbsize;
  562.     viewports[i].backbuf = backbuf;
  563.     viewports[i].bb_invalid = false;
  564.    
  565.     viewports[i].initialized = true;
  566.    
  567.     render_glyphs(&viewports[i]);
  568.    
  569.     return i;
  570. }
  571.  
  572.  
  573. /** Initialize framebuffer as a chardev output device
  574.  *
  575.  * @param addr   Address of the framebuffer
  576.  * @param xres   Screen width in pixels
  577.  * @param yres   Screen height in pixels
  578.  * @param visual Bits per pixel (8, 16, 24, 32)
  579.  * @param scan   Bytes per one scanline
  580.  *
  581.  */
  582. static bool screen_init(void *addr, unsigned int xres, unsigned int yres,
  583.     unsigned int scan, unsigned int visual)
  584. {
  585.     switch (visual) {
  586.     case VISUAL_INDIRECT_8:
  587.         screen.rgb_conv = rgb_323;
  588.         screen.pixelbytes = 1;
  589.         break;
  590.     case VISUAL_RGB_5_5_5:
  591.         screen.rgb_conv = rgb_555;
  592.         screen.pixelbytes = 2;
  593.         break;
  594.     case VISUAL_RGB_5_6_5:
  595.         screen.rgb_conv = rgb_565;
  596.         screen.pixelbytes = 2;
  597.         break;
  598.     case VISUAL_RGB_8_8_8:
  599.         screen.rgb_conv = rgb_888;
  600.         screen.pixelbytes = 3;
  601.         break;
  602.     case VISUAL_RGB_8_8_8_0:
  603.         screen.rgb_conv = rgb_888;
  604.         screen.pixelbytes = 4;
  605.         break;
  606.     case VISUAL_RGB_0_8_8_8:
  607.         screen.rgb_conv = rgb_0888;
  608.         screen.pixelbytes = 4;
  609.         break;
  610.     case VISUAL_BGR_0_8_8_8:
  611.         screen.rgb_conv = bgr_0888;
  612.         screen.pixelbytes = 4;
  613.         break;
  614.     default:
  615.         return false;
  616.     }
  617.  
  618.     screen.fb_addr = (unsigned char *) addr;
  619.     screen.xres = xres;
  620.     screen.yres = yres;
  621.     screen.scanline = scan;
  622.    
  623.     screen.glyphscanline = FONT_WIDTH * screen.pixelbytes;
  624.     screen.glyphbytes = screen.glyphscanline * FONT_SCANLINES;
  625.    
  626.     /* Create first viewport */
  627.     vport_create(0, 0, xres, yres);
  628.    
  629.     return true;
  630. }
  631.  
  632.  
  633. /** Draw a glyph, takes advantage of alignment.
  634.  *
  635.  * This version can only be used if the following conditions are met:
  636.  *
  637.  *   - word size is divisible by pixelbytes
  638.  *   - cell scanline size is divisible by word size
  639.  *   - cell scanlines are word-aligned
  640.  *
  641.  * It makes use of the pre-rendered mask to process (possibly) several
  642.  * pixels at once (word size / pixelbytes pixels at a time are processed)
  643.  * making it very fast. Most notably this version is not applicable at 24 bits
  644.  * per pixel.
  645.  *
  646.  * @param x     x coordinate of top-left corner on screen.
  647.  * @param y     y coordinate of top-left corner on screen.
  648.  * @param cursor    Draw glyph with cursor
  649.  * @param glyphs    Pointer to font bitmap.
  650.  * @param glyph     Code of the glyph to draw.
  651.  * @param fg_color  Foreground color.
  652.  * @param bg_color  Backgroudn color.
  653.  */
  654. static void draw_glyph_aligned(unsigned int x, unsigned int y, bool cursor,
  655.     uint8_t *glyphs, uint8_t glyph, uint32_t fg_color, uint32_t bg_color)
  656. {
  657.     unsigned int i, yd;
  658.     unsigned long fg_buf, bg_buf;
  659.     unsigned long *maskp, *dp;
  660.     unsigned long mask;
  661.     unsigned int ww, d_add;
  662.  
  663.     /*
  664.      * Prepare a pair of words, one filled with foreground-color
  665.      * pattern and the other filled with background-color pattern.
  666.      */
  667.     for (i = 0; i < sizeof(unsigned long) / screen.pixelbytes; i++) {
  668.         screen.rgb_conv(&((uint8_t *)&fg_buf)[i * screen.pixelbytes],
  669.             fg_color);
  670.         screen.rgb_conv(&((uint8_t *)&bg_buf)[i * screen.pixelbytes],
  671.             bg_color);
  672.     }
  673.  
  674.  
  675.     /* Pointer to the current position in the mask. */
  676.     maskp = (unsigned long *) &glyphs[GLYPH_POS(glyph, 0, cursor)];
  677.  
  678.     /* Pointer to the current position on the screen. */
  679.     dp = (unsigned long *) &screen.fb_addr[FB_POS(x, y)];
  680.  
  681.     /* Width of the character cell in words. */
  682.     ww = FONT_WIDTH * screen.pixelbytes / sizeof(unsigned long);
  683.  
  684.     /* Offset to add when moving to another screen scanline. */
  685.     d_add = screen.scanline - FONT_WIDTH * screen.pixelbytes;
  686.  
  687.     for (yd = 0; yd < FONT_SCANLINES; yd++) {
  688.         /*
  689.          * Now process the cell scanline, combining foreground
  690.          * and background color patters using the pre-rendered mask.
  691.          */
  692.         for (i = 0; i < ww; i++) {
  693.             mask = *maskp++;
  694.             *dp++ = (fg_buf & mask) | (bg_buf & ~mask);
  695.         }
  696.  
  697.         /* Move to the beginning of the next scanline of the cell. */
  698.         dp = (unsigned long *) ((uint8_t *) dp + d_add);
  699.     }
  700. }
  701.  
  702. /** Draw a glyph, fallback version.
  703.  *
  704.  * This version does not make use of the pre-rendered mask, it uses
  705.  * the font bitmap directly. It works always, but it is slower.
  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. void draw_glyph_fallback(unsigned int x, unsigned int y, bool cursor,
  716.     uint8_t *glyphs, uint8_t glyph, uint32_t fg_color, uint32_t bg_color)
  717. {
  718.     unsigned int i, j, yd;
  719.     uint8_t fg_buf[4], bg_buf[4];
  720.     uint8_t *dp, *sp;
  721.     unsigned int d_add;
  722.     uint8_t b;
  723.  
  724.     /* Pre-render 1x the foreground and background color pixels. */
  725.     if (cursor) {
  726.         screen.rgb_conv(fg_buf, bg_color);
  727.         screen.rgb_conv(bg_buf, fg_color);
  728.     } else {
  729.         screen.rgb_conv(fg_buf, fg_color);
  730.         screen.rgb_conv(bg_buf, bg_color);
  731.     }
  732.  
  733.     /* Pointer to the current position on the screen. */
  734.     dp = (uint8_t *) &screen.fb_addr[FB_POS(x, y)];
  735.  
  736.     /* Offset to add when moving to another screen scanline. */
  737.     d_add = screen.scanline - FONT_WIDTH * screen.pixelbytes;
  738.  
  739.     for (yd = 0; yd < FONT_SCANLINES; yd++) {
  740.         /* Byte containing bits of the glyph scanline. */
  741.         b = fb_font[glyph * FONT_SCANLINES + yd];
  742.  
  743.         for (i = 0; i < FONT_WIDTH; i++) {
  744.             /* Choose color based on the current bit. */
  745.             sp = (b & 0x80) ? fg_buf : bg_buf;
  746.  
  747.             /* Copy the pixel. */
  748.             for (j = 0; j < screen.pixelbytes; j++) {
  749.                 *dp++ = *sp++;
  750.             }
  751.  
  752.             /* Move to the next bit. */
  753.             b = b << 1;
  754.         }
  755.        
  756.         /* Move to the beginning of the next scanline of the cell. */
  757.         dp += d_add;
  758.     }
  759. }
  760.  
  761. /** Draw glyph at specified position in viewport.
  762.  *
  763.  * @param vport  Viewport identification
  764.  * @param cursor Draw glyph with cursor
  765.  * @param col    Screen position relative to viewport
  766.  * @param row    Screen position relative to viewport
  767.  *
  768.  */
  769. static void draw_vp_glyph(viewport_t *vport, bool cursor, unsigned int col,
  770.     unsigned int row)
  771. {
  772.     unsigned int x = vport->x + COL2X(col);
  773.     unsigned int y = vport->y + ROW2Y(row);
  774.  
  775.     uint8_t glyph;
  776.     uint32_t fg_color;
  777.     uint32_t bg_color;
  778.    
  779.     glyph = vport->backbuf[BB_POS(vport, col, row)].glyph;
  780.     fg_color = vport->backbuf[BB_POS(vport, col, row)].fg_color;
  781.     bg_color = vport->backbuf[BB_POS(vport, col, row)].bg_color;
  782.  
  783.     (*vport->dglyph)(x, y, cursor, vport->glyphs, glyph,
  784.         fg_color, bg_color);
  785. }
  786.  
  787. /** Hide cursor if it is shown
  788.  *
  789.  */
  790. static void cursor_hide(viewport_t *vport)
  791. {
  792.     if ((vport->cursor_active) && (vport->cursor_shown)) {
  793.         draw_vp_glyph(vport, false, vport->cur_col, vport->cur_row);
  794.         vport->cursor_shown = false;
  795.     }
  796. }
  797.  
  798.  
  799. /** Show cursor if cursor showing is enabled
  800.  *
  801.  */
  802. static void cursor_show(viewport_t *vport)
  803. {
  804.     /* Do not check for cursor_shown */
  805.     if (vport->cursor_active) {
  806.         draw_vp_glyph(vport, true, vport->cur_col, vport->cur_row);
  807.         vport->cursor_shown = true;
  808.     }
  809. }
  810.  
  811.  
  812. /** Invert cursor, if it is enabled
  813.  *
  814.  */
  815. static void cursor_blink(viewport_t *vport)
  816. {
  817.     if (vport->cursor_shown)
  818.         cursor_hide(vport);
  819.     else
  820.         cursor_show(vport);
  821. }
  822.  
  823.  
  824. /** Draw character at given position relative to viewport
  825.  *
  826.  * @param vport  Viewport identification
  827.  * @param c      Character to draw
  828.  * @param col    Screen position relative to viewport
  829.  * @param row    Screen position relative to viewport
  830.  *
  831.  */
  832. static void draw_char(viewport_t *vport, uint8_t c, unsigned int col, unsigned int row)
  833. {
  834.     bb_cell_t *bbp;
  835.  
  836.     /* Do not hide cursor if we are going to overwrite it */
  837.     if ((vport->cursor_active) && (vport->cursor_shown) &&
  838.         ((vport->cur_col != col) || (vport->cur_row != row)))
  839.         cursor_hide(vport);
  840.  
  841.     bbp = &vport->backbuf[BB_POS(vport, col, row)];
  842.     bbp->glyph = c;
  843.     bbp->fg_color = vport->attr.fg_color;
  844.     bbp->bg_color = vport->attr.bg_color;
  845.  
  846.     draw_vp_glyph(vport, false, col, row);
  847.    
  848.     vport->cur_col = col;
  849.     vport->cur_row = row;
  850.    
  851.     vport->cur_col++;
  852.     if (vport->cur_col >= vport->cols) {
  853.         vport->cur_col = 0;
  854.         vport->cur_row++;
  855.         if (vport->cur_row >= vport->rows)
  856.             vport->cur_row--;
  857.     }
  858.    
  859.     cursor_show(vport);
  860. }
  861.  
  862.  
  863. /** Draw text data to viewport
  864.  *
  865.  * @param vport Viewport id
  866.  * @param data  Text data fitting exactly into viewport
  867.  *
  868.  */
  869. static void draw_text_data(viewport_t *vport, keyfield_t *data)
  870. {
  871.     unsigned int i;
  872.     bb_cell_t *bbp;
  873.     attrs_t *a;
  874.     attr_rgb_t rgb;
  875.    
  876.     for (i = 0; i < vport->cols * vport->rows; i++) {
  877.         unsigned int col = i % vport->cols;
  878.         unsigned int row = i / vport->cols;
  879.        
  880.         bbp = &vport->backbuf[BB_POS(vport, col, row)];
  881.         uint8_t glyph = bbp->glyph;
  882.  
  883.         a = &data[i].attrs;
  884.         rgb_from_attr(&rgb, a);
  885.  
  886.         if (glyph != data[i].character ||
  887.             rgb.fg_color != bbp->fg_color ||
  888.             rgb.bg_color != bbp->bg_color ||
  889.             vport->bb_invalid) {
  890.             bbp->glyph = data[i].character;
  891.  
  892.             bbp->fg_color = rgb.fg_color;
  893.             bbp->bg_color = rgb.bg_color;
  894.  
  895.             draw_vp_glyph(vport, false, col, row);
  896.         }
  897.     }
  898.     cursor_show(vport);
  899. }
  900.  
  901.  
  902. static void putpixel_pixmap(void *data, unsigned int x, unsigned int y, uint32_t color)
  903. {
  904.     int pm = *((int *) data);
  905.     pixmap_t *pmap = &pixmaps[pm];
  906.     unsigned int pos = (y * pmap->width + x) * screen.pixelbytes;
  907.    
  908.     screen.rgb_conv(&pmap->data[pos], color);
  909. }
  910.  
  911.  
  912. static void putpixel(void *data, unsigned int x, unsigned int y, uint32_t color)
  913. {
  914.     viewport_t *vport = (viewport_t *) data;
  915.     unsigned int dx = vport->x + x;
  916.     unsigned int dy = vport->y + y;
  917.    
  918.     screen.rgb_conv(&screen.fb_addr[FB_POS(dx, dy)], color);
  919. }
  920.  
  921.  
  922. /** Return first free pixmap
  923.  *
  924.  */
  925. static int find_free_pixmap(void)
  926. {
  927.     unsigned int i;
  928.    
  929.     for (i = 0; i < MAX_PIXMAPS; i++)
  930.         if (!pixmaps[i].data)
  931.             return i;
  932.    
  933.     return -1;
  934. }
  935.  
  936.  
  937. /** Create a new pixmap and return appropriate ID
  938.  *
  939.  */
  940. static int shm2pixmap(unsigned char *shm, size_t size)
  941. {
  942.     int pm;
  943.     pixmap_t *pmap;
  944.    
  945.     pm = find_free_pixmap();
  946.     if (pm == -1)
  947.         return ELIMIT;
  948.    
  949.     pmap = &pixmaps[pm];
  950.    
  951.     if (ppm_get_data(shm, size, &pmap->width, &pmap->height))
  952.         return EINVAL;
  953.    
  954.     pmap->data = malloc(pmap->width * pmap->height * screen.pixelbytes);
  955.     if (!pmap->data)
  956.         return ENOMEM;
  957.    
  958.     ppm_draw(shm, size, 0, 0, pmap->width, pmap->height, putpixel_pixmap, (void *) &pm);
  959.    
  960.     return pm;
  961. }
  962.  
  963.  
  964. /** Handle shared memory communication calls
  965.  *
  966.  * Protocol for drawing pixmaps:
  967.  * - FB_PREPARE_SHM(client shm identification)
  968.  * - IPC_M_AS_AREA_SEND
  969.  * - FB_DRAW_PPM(startx, starty)
  970.  * - FB_DROP_SHM
  971.  *
  972.  * Protocol for text drawing
  973.  * - IPC_M_AS_AREA_SEND
  974.  * - FB_DRAW_TEXT_DATA
  975.  *
  976.  * @param callid Callid of the current call
  977.  * @param call   Current call data
  978.  * @param vp     Active viewport
  979.  *
  980.  * @return false if the call was not handled byt this function, true otherwise
  981.  *
  982.  * Note: this function is not threads safe, you would have
  983.  * to redefine static variables with __thread
  984.  *
  985.  */
  986. static bool shm_handle(ipc_callid_t callid, ipc_call_t *call, int vp)
  987. {
  988.     static keyfield_t *interbuffer = NULL;
  989.     static size_t intersize = 0;
  990.    
  991.     static unsigned char *shm = NULL;
  992.     static ipcarg_t shm_id = 0;
  993.     static size_t shm_size;
  994.    
  995.     bool handled = true;
  996.     int retval = EOK;
  997.     viewport_t *vport = &viewports[vp];
  998.     unsigned int x;
  999.     unsigned int y;
  1000.    
  1001.     switch (IPC_GET_METHOD(*call)) {
  1002.     case IPC_M_SHARE_OUT:
  1003.         /* We accept one area for data interchange */
  1004.         if (IPC_GET_ARG1(*call) == shm_id) {
  1005.             void *dest = as_get_mappable_page(IPC_GET_ARG2(*call));
  1006.             shm_size = IPC_GET_ARG2(*call);
  1007.             if (!ipc_answer_1(callid, EOK, (sysarg_t) dest))
  1008.                 shm = dest;
  1009.             else
  1010.                 shm_id = 0;
  1011.            
  1012.             if (shm[0] != 'P')
  1013.                 return false;
  1014.            
  1015.             return true;
  1016.         } else {
  1017.             intersize = IPC_GET_ARG2(*call);
  1018.             receive_comm_area(callid, call, (void *) &interbuffer);
  1019.         }
  1020.         return true;
  1021.     case FB_PREPARE_SHM:
  1022.         if (shm_id)
  1023.             retval = EBUSY;
  1024.         else
  1025.             shm_id = IPC_GET_ARG1(*call);
  1026.         break;
  1027.        
  1028.     case FB_DROP_SHM:
  1029.         if (shm) {
  1030.             as_area_destroy(shm);
  1031.             shm = NULL;
  1032.         }
  1033.         shm_id = 0;
  1034.         break;
  1035.        
  1036.     case FB_SHM2PIXMAP:
  1037.         if (!shm) {
  1038.             retval = EINVAL;
  1039.             break;
  1040.         }
  1041.         retval = shm2pixmap(shm, shm_size);
  1042.         break;
  1043.     case FB_DRAW_PPM:
  1044.         if (!shm) {
  1045.             retval = EINVAL;
  1046.             break;
  1047.         }
  1048.         x = IPC_GET_ARG1(*call);
  1049.         y = IPC_GET_ARG2(*call);
  1050.        
  1051.         if ((x > vport->width) || (y > vport->height)) {
  1052.             retval = EINVAL;
  1053.             break;
  1054.         }
  1055.        
  1056.         ppm_draw(shm, shm_size, IPC_GET_ARG1(*call),
  1057.             IPC_GET_ARG2(*call), vport->width - x, vport->height - y, putpixel, (void *) vport);
  1058.         break;
  1059.     case FB_DRAW_TEXT_DATA:
  1060.         if (!interbuffer) {
  1061.             retval = EINVAL;
  1062.             break;
  1063.         }
  1064.         if (intersize < vport->cols * vport->rows * sizeof(*interbuffer)) {
  1065.             retval = EINVAL;
  1066.             break;
  1067.         }
  1068.         draw_text_data(vport, interbuffer);
  1069.         break;
  1070.     default:
  1071.         handled = false;
  1072.     }
  1073.    
  1074.     if (handled)
  1075.         ipc_answer_0(callid, retval);
  1076.     return handled;
  1077. }
  1078.  
  1079.  
  1080. static void copy_vp_to_pixmap(viewport_t *vport, pixmap_t *pmap)
  1081. {
  1082.     unsigned int width = vport->width;
  1083.     unsigned int height = vport->height;
  1084.    
  1085.     if (width + vport->x > screen.xres)
  1086.         width = screen.xres - vport->x;
  1087.     if (height + vport->y > screen.yres)
  1088.         height = screen.yres - vport->y;
  1089.    
  1090.     unsigned int realwidth = pmap->width <= width ? pmap->width : width;
  1091.     unsigned int realheight = pmap->height <= height ? pmap->height : height;
  1092.    
  1093.     unsigned int srcrowsize = vport->width * screen.pixelbytes;
  1094.     unsigned int realrowsize = realwidth * screen.pixelbytes;
  1095.    
  1096.     unsigned int y;
  1097.     for (y = 0; y < realheight; y++) {
  1098.         unsigned int tmp = (vport->y + y) * screen.scanline + vport->x * screen.pixelbytes;
  1099.         memcpy(pmap->data + srcrowsize * y, screen.fb_addr + tmp, realrowsize);
  1100.     }
  1101. }
  1102.  
  1103.  
  1104. /** Save viewport to pixmap
  1105.  *
  1106.  */
  1107. static int save_vp_to_pixmap(viewport_t *vport)
  1108. {
  1109.     int pm;
  1110.     pixmap_t *pmap;
  1111.    
  1112.     pm = find_free_pixmap();
  1113.     if (pm == -1)
  1114.         return ELIMIT;
  1115.    
  1116.     pmap = &pixmaps[pm];
  1117.     pmap->data = malloc(screen.pixelbytes * vport->width * vport->height);
  1118.     if (!pmap->data)
  1119.         return ENOMEM;
  1120.    
  1121.     pmap->width = vport->width;
  1122.     pmap->height = vport->height;
  1123.    
  1124.     copy_vp_to_pixmap(vport, pmap);
  1125.    
  1126.     return pm;
  1127. }
  1128.  
  1129.  
  1130. /** Draw pixmap on screen
  1131.  *
  1132.  * @param vp Viewport to draw on
  1133.  * @param pm Pixmap identifier
  1134.  *
  1135.  */
  1136. static int draw_pixmap(int vp, int pm)
  1137. {
  1138.     pixmap_t *pmap = &pixmaps[pm];
  1139.     viewport_t *vport = &viewports[vp];
  1140.    
  1141.     unsigned int width = vport->width;
  1142.     unsigned int height = vport->height;
  1143.    
  1144.     if (width + vport->x > screen.xres)
  1145.         width = screen.xres - vport->x;
  1146.     if (height + vport->y > screen.yres)
  1147.         height = screen.yres - vport->y;
  1148.    
  1149.     if (!pmap->data)
  1150.         return EINVAL;
  1151.    
  1152.     unsigned int realwidth = pmap->width <= width ? pmap->width : width;
  1153.     unsigned int realheight = pmap->height <= height ? pmap->height : height;
  1154.    
  1155.     unsigned int srcrowsize = vport->width * screen.pixelbytes;
  1156.     unsigned int realrowsize = realwidth * screen.pixelbytes;
  1157.    
  1158.     unsigned int y;
  1159.     for (y = 0; y < realheight; y++) {
  1160.         unsigned int tmp = (vport->y + y) * screen.scanline + vport->x * screen.pixelbytes;
  1161.         memcpy(screen.fb_addr + tmp, pmap->data + y * srcrowsize, realrowsize);
  1162.     }
  1163.    
  1164.     return EOK;
  1165. }
  1166.  
  1167.  
  1168. /** Tick animation one step forward
  1169.  *
  1170.  */
  1171. static void anims_tick(void)
  1172. {
  1173.     unsigned int i;
  1174.     static int counts = 0;
  1175.    
  1176.     /* Limit redrawing */
  1177.     counts = (counts + 1) % 8;
  1178.     if (counts)
  1179.         return;
  1180.  
  1181.     for (i = 0; i < MAX_ANIMATIONS; i++) {
  1182.         if ((!animations[i].animlen) || (!animations[i].initialized) ||
  1183.             (!animations[i].enabled))
  1184.             continue;
  1185.        
  1186.         draw_pixmap(animations[i].vp, animations[i].pixmaps[animations[i].pos]);
  1187.         animations[i].pos = (animations[i].pos + 1) % animations[i].animlen;
  1188.     }
  1189. }
  1190.  
  1191.  
  1192. static unsigned int pointer_x;
  1193. static unsigned int pointer_y;
  1194. static bool pointer_shown, pointer_enabled;
  1195. static int pointer_vport = -1;
  1196. static int pointer_pixmap = -1;
  1197.  
  1198.  
  1199. static void mouse_show(void)
  1200. {
  1201.     int i, j;
  1202.     int visibility;
  1203.     int color;
  1204.     int bytepos;
  1205.    
  1206.     if ((pointer_shown) || (!pointer_enabled))
  1207.         return;
  1208.    
  1209.     /* Save image under the pointer. */
  1210.     if (pointer_vport == -1) {
  1211.         pointer_vport = vport_create(pointer_x, pointer_y, pointer_width, pointer_height);
  1212.         if (pointer_vport < 0)
  1213.             return;
  1214.     } else {
  1215.         viewports[pointer_vport].x = pointer_x;
  1216.         viewports[pointer_vport].y = pointer_y;
  1217.     }
  1218.    
  1219.     if (pointer_pixmap == -1)
  1220.         pointer_pixmap = save_vp_to_pixmap(&viewports[pointer_vport]);
  1221.     else
  1222.         copy_vp_to_pixmap(&viewports[pointer_vport], &pixmaps[pointer_pixmap]);
  1223.    
  1224.     /* Draw mouse pointer. */
  1225.     for (i = 0; i < pointer_height; i++)
  1226.         for (j = 0; j < pointer_width; j++) {
  1227.             bytepos = i * ((pointer_width - 1) / 8 + 1) + j / 8;
  1228.             visibility = pointer_mask_bits[bytepos] &
  1229.                 (1 << (j % 8));
  1230.             if (visibility) {
  1231.                 color = pointer_bits[bytepos] &
  1232.                     (1 << (j % 8)) ? 0 : 0xffffff;
  1233.                 if (pointer_x + j < screen.xres && pointer_y +
  1234.                     i < screen.yres)
  1235.                     putpixel(&viewports[0], pointer_x + j,
  1236.                         pointer_y + i, color);
  1237.             }
  1238.         }
  1239.     pointer_shown = 1;
  1240. }
  1241.  
  1242.  
  1243. static void mouse_hide(void)
  1244. {
  1245.     /* Restore image under the pointer. */
  1246.     if (pointer_shown) {
  1247.         draw_pixmap(pointer_vport, pointer_pixmap);
  1248.         pointer_shown = 0;
  1249.     }
  1250. }
  1251.  
  1252.  
  1253. static void mouse_move(unsigned int x, unsigned int y)
  1254. {
  1255.     mouse_hide();
  1256.     pointer_x = x;
  1257.     pointer_y = y;
  1258.     mouse_show();
  1259. }
  1260.  
  1261.  
  1262. static int anim_handle(ipc_callid_t callid, ipc_call_t *call, int vp)
  1263. {
  1264.     bool handled = true;
  1265.     int retval = EOK;
  1266.     int i, nvp;
  1267.     int newval;
  1268.    
  1269.     switch (IPC_GET_METHOD(*call)) {
  1270.     case FB_ANIM_CREATE:
  1271.         nvp = IPC_GET_ARG1(*call);
  1272.         if (nvp == -1)
  1273.             nvp = vp;
  1274.         if (nvp >= MAX_VIEWPORTS || nvp < 0 ||
  1275.             !viewports[nvp].initialized) {
  1276.             retval = EINVAL;
  1277.             break;
  1278.         }
  1279.         for (i = 0; i < MAX_ANIMATIONS; i++) {
  1280.             if (!animations[i].initialized)
  1281.                 break;
  1282.         }
  1283.         if (i == MAX_ANIMATIONS) {
  1284.             retval = ELIMIT;
  1285.             break;
  1286.         }
  1287.         animations[i].initialized = 1;
  1288.         animations[i].animlen = 0;
  1289.         animations[i].pos = 0;
  1290.         animations[i].enabled = 0;
  1291.         animations[i].vp = nvp;
  1292.         retval = i;
  1293.         break;
  1294.     case FB_ANIM_DROP:
  1295.         i = IPC_GET_ARG1(*call);
  1296.         if (i >= MAX_ANIMATIONS || i < 0) {
  1297.             retval = EINVAL;
  1298.             break;
  1299.         }
  1300.         animations[i].initialized = 0;
  1301.         break;
  1302.     case FB_ANIM_ADDPIXMAP:
  1303.         i = IPC_GET_ARG1(*call);
  1304.         if (i >= MAX_ANIMATIONS || i < 0 ||
  1305.             !animations[i].initialized) {
  1306.             retval = EINVAL;
  1307.             break;
  1308.         }
  1309.         if (animations[i].animlen == MAX_ANIM_LEN) {
  1310.             retval = ELIMIT;
  1311.             break;
  1312.         }
  1313.         newval = IPC_GET_ARG2(*call);
  1314.         if (newval < 0 || newval > MAX_PIXMAPS ||
  1315.             !pixmaps[newval].data) {
  1316.             retval = EINVAL;
  1317.             break;
  1318.         }
  1319.         animations[i].pixmaps[animations[i].animlen++] = newval;
  1320.         break;
  1321.     case FB_ANIM_CHGVP:
  1322.         i = IPC_GET_ARG1(*call);
  1323.         if (i >= MAX_ANIMATIONS || i < 0) {
  1324.             retval = EINVAL;
  1325.             break;
  1326.         }
  1327.         nvp = IPC_GET_ARG2(*call);
  1328.         if (nvp == -1)
  1329.             nvp = vp;
  1330.         if (nvp >= MAX_VIEWPORTS || nvp < 0 ||
  1331.             !viewports[nvp].initialized) {
  1332.             retval = EINVAL;
  1333.             break;
  1334.         }
  1335.         animations[i].vp = nvp;
  1336.         break;
  1337.     case FB_ANIM_START:
  1338.     case FB_ANIM_STOP:
  1339.         i = IPC_GET_ARG1(*call);
  1340.         if (i >= MAX_ANIMATIONS || i < 0) {
  1341.             retval = EINVAL;
  1342.             break;
  1343.         }
  1344.         newval = (IPC_GET_METHOD(*call) == FB_ANIM_START);
  1345.         if (newval ^ animations[i].enabled) {
  1346.             animations[i].enabled = newval;
  1347.             anims_enabled += newval ? 1 : -1;
  1348.         }
  1349.         break;
  1350.     default:
  1351.         handled = 0;
  1352.     }
  1353.     if (handled)
  1354.         ipc_answer_0(callid, retval);
  1355.     return handled;
  1356. }
  1357.  
  1358.  
  1359. /** Handler for messages concerning pixmap handling
  1360.  *
  1361.  */
  1362. static int pixmap_handle(ipc_callid_t callid, ipc_call_t *call, int vp)
  1363. {
  1364.     bool handled = true;
  1365.     int retval = EOK;
  1366.     int i, nvp;
  1367.    
  1368.     switch (IPC_GET_METHOD(*call)) {
  1369.     case FB_VP_DRAW_PIXMAP:
  1370.         nvp = IPC_GET_ARG1(*call);
  1371.         if (nvp == -1)
  1372.             nvp = vp;
  1373.         if (nvp < 0 || nvp >= MAX_VIEWPORTS ||
  1374.             !viewports[nvp].initialized) {
  1375.             retval = EINVAL;
  1376.             break;
  1377.         }
  1378.         i = IPC_GET_ARG2(*call);
  1379.         retval = draw_pixmap(nvp, i);
  1380.         break;
  1381.     case FB_VP2PIXMAP:
  1382.         nvp = IPC_GET_ARG1(*call);
  1383.         if (nvp == -1)
  1384.             nvp = vp;
  1385.         if (nvp < 0 || nvp >= MAX_VIEWPORTS ||
  1386.             !viewports[nvp].initialized)
  1387.             retval = EINVAL;
  1388.         else
  1389.             retval = save_vp_to_pixmap(&viewports[nvp]);
  1390.         break;
  1391.     case FB_DROP_PIXMAP:
  1392.         i = IPC_GET_ARG1(*call);
  1393.         if (i >= MAX_PIXMAPS) {
  1394.             retval = EINVAL;
  1395.             break;
  1396.         }
  1397.         if (pixmaps[i].data) {
  1398.             free(pixmaps[i].data);
  1399.             pixmaps[i].data = NULL;
  1400.         }
  1401.         break;
  1402.     default:
  1403.         handled = 0;
  1404.     }
  1405.    
  1406.     if (handled)
  1407.         ipc_answer_0(callid, retval);
  1408.     return handled;
  1409.    
  1410. }
  1411.  
  1412. static int rgb_from_style(attr_rgb_t *rgb, int style)
  1413. {
  1414.     switch (style) {
  1415.     case STYLE_NORMAL:
  1416.         rgb->fg_color = color_table[COLOR_BLACK];
  1417.         rgb->bg_color = color_table[COLOR_WHITE];
  1418.         break;
  1419.     case STYLE_EMPHASIS:
  1420.         rgb->fg_color = color_table[COLOR_RED];
  1421.         rgb->bg_color = color_table[COLOR_WHITE];
  1422.         break;
  1423.     default:
  1424.         return EINVAL;
  1425.     }
  1426.  
  1427.     return EOK;
  1428. }
  1429.  
  1430. static int rgb_from_idx(attr_rgb_t *rgb, ipcarg_t fg_color,
  1431.     ipcarg_t bg_color, ipcarg_t flags)
  1432. {
  1433.     fg_color = (fg_color & 7) | ((flags & CATTR_BRIGHT) ? 8 : 0);
  1434.     bg_color = (bg_color & 7) | ((flags & CATTR_BRIGHT) ? 8 : 0);
  1435.  
  1436.     rgb->fg_color = color_table[fg_color];
  1437.     rgb->bg_color = color_table[bg_color];
  1438.  
  1439.     return EOK;
  1440. }
  1441.  
  1442. static int rgb_from_attr(attr_rgb_t *rgb, const attrs_t *a)
  1443. {
  1444.     int rc;
  1445.  
  1446.     switch (a->t) {
  1447.     case at_style:
  1448.         rc = rgb_from_style(rgb, a->a.s.style);
  1449.         break;
  1450.     case at_idx:
  1451.         rc = rgb_from_idx(rgb, a->a.i.fg_color,
  1452.             a->a.i.bg_color, a->a.i.flags);
  1453.         break;
  1454.     case at_rgb:
  1455.         *rgb = a->a.r;
  1456.         rc = EOK;
  1457.         break;
  1458.     }
  1459.  
  1460.     return rc;
  1461. }
  1462.  
  1463. static int fb_set_style(viewport_t *vport, ipcarg_t style)
  1464. {
  1465.     return rgb_from_style(&vport->attr, (int) style);
  1466. }
  1467.  
  1468. static int fb_set_color(viewport_t *vport, ipcarg_t fg_color,
  1469.     ipcarg_t bg_color, ipcarg_t flags)
  1470. {
  1471.     return rgb_from_idx(&vport->attr, fg_color, bg_color, flags);
  1472. }
  1473.  
  1474. /** Function for handling connections to FB
  1475.  *
  1476.  */
  1477. static void fb_client_connection(ipc_callid_t iid, ipc_call_t *icall)
  1478. {
  1479.     unsigned int vp = 0;
  1480.     viewport_t *vport = &viewports[vp];
  1481.    
  1482.     if (client_connected) {
  1483.         ipc_answer_0(iid, ELIMIT);
  1484.         return;
  1485.     }
  1486.    
  1487.     /* Accept connection */
  1488.     client_connected = true;
  1489.     ipc_answer_0(iid, EOK);
  1490.    
  1491.     while (true) {
  1492.         ipc_callid_t callid;
  1493.         ipc_call_t call;
  1494.         int retval;
  1495.         unsigned int i;
  1496.         int scroll;
  1497.         uint8_t glyph;
  1498.         unsigned int row, col;
  1499.        
  1500.         if ((vport->cursor_active) || (anims_enabled))
  1501.             callid = async_get_call_timeout(&call, 250000);
  1502.         else
  1503.             callid = async_get_call(&call);
  1504.        
  1505.         mouse_hide();
  1506.         if (!callid) {
  1507.             cursor_blink(vport);
  1508.             anims_tick();
  1509.             mouse_show();
  1510.             continue;
  1511.         }
  1512.        
  1513.         if (shm_handle(callid, &call, vp))
  1514.             continue;
  1515.        
  1516.         if (pixmap_handle(callid, &call, vp))
  1517.             continue;
  1518.        
  1519.         if (anim_handle(callid, &call, vp))
  1520.             continue;
  1521.        
  1522.         switch (IPC_GET_METHOD(call)) {
  1523.         case IPC_M_PHONE_HUNGUP:
  1524.             client_connected = false;
  1525.            
  1526.             /* Cleanup other viewports */
  1527.             for (i = 1; i < MAX_VIEWPORTS; i++)
  1528.                 vport->initialized = false;
  1529.            
  1530.             /* Exit thread */
  1531.             return;
  1532.        
  1533.         case FB_PUTCHAR:
  1534.             glyph = IPC_GET_ARG1(call);
  1535.             row = IPC_GET_ARG2(call);
  1536.             col = IPC_GET_ARG3(call);
  1537.            
  1538.             if ((col >= vport->cols) || (row >= vport->rows)) {
  1539.                 retval = EINVAL;
  1540.                 break;
  1541.             }
  1542.             ipc_answer_0(callid, EOK);
  1543.            
  1544.             draw_char(vport, glyph, col, row);
  1545.            
  1546.             /* Message already answered */
  1547.             continue;
  1548.         case FB_CLEAR:
  1549.             vport_clear(vport);
  1550.             cursor_show(vport);
  1551.             retval = EOK;
  1552.             break;
  1553.         case FB_CURSOR_GOTO:
  1554.             row = IPC_GET_ARG1(call);
  1555.             col = IPC_GET_ARG2(call);
  1556.            
  1557.             if ((col >= vport->cols) || (row >= vport->rows)) {
  1558.                 retval = EINVAL;
  1559.                 break;
  1560.             }
  1561.             retval = EOK;
  1562.            
  1563.             cursor_hide(vport);
  1564.             vport->cur_col = col;
  1565.             vport->cur_row = row;
  1566.             cursor_show(vport);
  1567.             break;
  1568.         case FB_CURSOR_VISIBILITY:
  1569.             cursor_hide(vport);
  1570.             vport->cursor_active = IPC_GET_ARG1(call);
  1571.             cursor_show(vport);
  1572.             retval = EOK;
  1573.             break;
  1574.         case FB_GET_CSIZE:
  1575.             ipc_answer_2(callid, EOK, vport->rows, vport->cols);
  1576.             continue;
  1577.         case FB_SCROLL:
  1578.             scroll = IPC_GET_ARG1(call);
  1579.             if ((scroll > (int) vport->rows) || (scroll < (-(int) vport->rows))) {
  1580.                 retval = EINVAL;
  1581.                 break;
  1582.             }
  1583.             cursor_hide(vport);
  1584.             vport_scroll(vport, scroll);
  1585.             cursor_show(vport);
  1586.             retval = EOK;
  1587.             break;
  1588.         case FB_VIEWPORT_SWITCH:
  1589.             i = IPC_GET_ARG1(call);
  1590.             if (i >= MAX_VIEWPORTS) {
  1591.                 retval = EINVAL;
  1592.                 break;
  1593.             }
  1594.             if (!viewports[i].initialized) {
  1595.                 retval = EADDRNOTAVAIL;
  1596.                 break;
  1597.             }
  1598.             cursor_hide(vport);
  1599.             vp = i;
  1600.             vport = &viewports[vp];
  1601.             cursor_show(vport);
  1602.             retval = EOK;
  1603.             break;
  1604.         case FB_VIEWPORT_CREATE:
  1605.             retval = vport_create(IPC_GET_ARG1(call) >> 16,
  1606.                 IPC_GET_ARG1(call) & 0xffff,
  1607.                 IPC_GET_ARG2(call) >> 16,
  1608.                 IPC_GET_ARG2(call) & 0xffff);
  1609.             break;
  1610.         case FB_VIEWPORT_DELETE:
  1611.             i = IPC_GET_ARG1(call);
  1612.             if (i >= MAX_VIEWPORTS) {
  1613.                 retval = EINVAL;
  1614.                 break;
  1615.             }
  1616.             if (!viewports[i].initialized) {
  1617.                 retval = EADDRNOTAVAIL;
  1618.                 break;
  1619.             }
  1620.             viewports[i].initialized = false;
  1621.             if (viewports[i].glyphs)
  1622.                 free(viewports[i].glyphs);
  1623.             if (viewports[i].bgpixel)
  1624.                 free(viewports[i].bgpixel);
  1625.             if (viewports[i].backbuf)
  1626.                 free(viewports[i].backbuf);
  1627.             retval = EOK;
  1628.             break;
  1629.         case FB_VIEWPORT_INVALIDATE:
  1630.             i = IPC_GET_ARG1(call);
  1631.             if (i >= MAX_VIEWPORTS) {
  1632.                 retval = EINVAL;
  1633.                 break;
  1634.             }
  1635.             viewports[i].bb_invalid = true;
  1636.             retval = EOK;
  1637.             break;
  1638.        
  1639.         case FB_SET_STYLE:
  1640.             retval = fb_set_style(vport, IPC_GET_ARG1(call));
  1641.             break;
  1642.         case FB_SET_COLOR:
  1643.             retval = fb_set_color(vport, IPC_GET_ARG1(call),
  1644.                 IPC_GET_ARG2(call), IPC_GET_ARG3(call));
  1645.             break;
  1646.         case FB_SET_RGB_COLOR:
  1647.             vport->attr.fg_color = IPC_GET_ARG1(call);
  1648.             vport->attr.bg_color = IPC_GET_ARG2(call);
  1649.             retval = EOK;
  1650.             break;
  1651.         case FB_GET_RESOLUTION:
  1652.             ipc_answer_2(callid, EOK, screen.xres, screen.yres);
  1653.             continue;
  1654.         case FB_POINTER_MOVE:
  1655.             pointer_enabled = true;
  1656.             mouse_move(IPC_GET_ARG1(call), IPC_GET_ARG2(call));
  1657.             retval = EOK;
  1658.             break;
  1659.         default:
  1660.             retval = ENOENT;
  1661.         }
  1662.         ipc_answer_0(callid, retval);
  1663.     }
  1664. }
  1665.  
  1666. /** Initialization of framebuffer
  1667.  *
  1668.  */
  1669. int fb_init(void)
  1670. {
  1671.     async_set_client_connection(fb_client_connection);
  1672.    
  1673.     void *fb_ph_addr = (void *) sysinfo_value("fb.address.physical");
  1674.     unsigned int fb_offset = sysinfo_value("fb.offset");
  1675.     unsigned int fb_width = sysinfo_value("fb.width");
  1676.     unsigned int fb_height = sysinfo_value("fb.height");
  1677.     unsigned int fb_scanline = sysinfo_value("fb.scanline");
  1678.     unsigned int fb_visual = sysinfo_value("fb.visual");
  1679.    
  1680.     unsigned int fbsize = fb_scanline * fb_height;
  1681.     void *fb_addr = as_get_mappable_page(fbsize);
  1682.    
  1683.     physmem_map(fb_ph_addr + fb_offset, fb_addr,
  1684.         ALIGN_UP(fbsize, PAGE_SIZE) >> PAGE_WIDTH, AS_AREA_READ | AS_AREA_WRITE);
  1685.    
  1686.     if (screen_init(fb_addr, fb_width, fb_height, fb_scanline, fb_visual))
  1687.         return 0;
  1688.    
  1689.     return -1;
  1690. }
  1691.  
  1692. /**
  1693.  * @}
  1694.  */
  1695.