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