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  1. /*
  2.  * Copyright (C) 2006 Jakub Vana
  3.  * Copyright (C) 2006 Ondrej Palkovsky
  4.  * All rights reserved.
  5.  *
  6.  * Redistribution and use in source and binary forms, with or without
  7.  * modification, are permitted provided that the following conditions
  8.  * are met:
  9.  *
  10.  * - Redistributions of source code must retain the above copyright
  11.  *   notice, this list of conditions and the following disclaimer.
  12.  * - Redistributions in binary form must reproduce the above copyright
  13.  *   notice, this list of conditions and the following disclaimer in the
  14.  *   documentation and/or other materials provided with the distribution.
  15.  * - The name of the author may not be used to endorse or promote products
  16.  *   derived from this software without specific prior written permission.
  17.  *
  18.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  19.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  20.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  21.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  22.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  23.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  24.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  25.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  26.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  27.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28.  */
  29.  
  30. /** @defgroup fbs Framebuffers
  31.  * @brief   HelenOS framebuffers.
  32.  * @{
  33.  * @}
  34.  */
  35. /** @defgroup fb Framebuffer
  36.  * @brief   HelenOS framebuffer.
  37.  * @ingroup fbs
  38.  * @{
  39.  */
  40. /** @file
  41.  */
  42.  
  43.  
  44. #include <stdlib.h>
  45. #include <unistd.h>
  46. #include <string.h>
  47. #include <ddi.h>
  48. #include <sysinfo.h>
  49. #include <align.h>
  50. #include <as.h>
  51. #include <ipc/fb.h>
  52. #include <ipc/ipc.h>
  53. #include <ipc/ns.h>
  54. #include <ipc/services.h>
  55. #include <kernel/errno.h>
  56. #include <async.h>
  57.  
  58. #include "font-8x16.h"
  59. #include "fb.h"
  60. #include "main.h"
  61. #include "../console/screenbuffer.h"
  62. #include "ppm.h"
  63.  
  64. #include "pointer.xbm"
  65. #include "pointer_mask.xbm"
  66.  
  67. #define DEFAULT_BGCOLOR                0xf0f0f0
  68. #define DEFAULT_FGCOLOR                0x0
  69.  
  70. /***************************************************************/
  71. /* Pixel specific fuctions */
  72.  
  73. typedef void (*conv2scr_fn_t)(void *, int);
  74. typedef int (*conv2rgb_fn_t)(void *);
  75.  
  76. struct {
  77.     __u8 *fbaddress ;
  78.  
  79.     unsigned int xres ;
  80.     unsigned int yres ;
  81.     unsigned int scanline ;
  82.     unsigned int pixelbytes ;
  83.  
  84.     conv2scr_fn_t rgb2scr;
  85.     conv2rgb_fn_t scr2rgb;
  86. } screen;
  87.  
  88. typedef struct {
  89.     int initialized;
  90.     unsigned int x, y;
  91.     unsigned int width, height;
  92.  
  93.     /* Text support in window */
  94.     unsigned int rows, cols;
  95.     /* Style for text printing */
  96.     style_t style;
  97.     /* Auto-cursor position */
  98.     int cursor_active, cur_col, cur_row;
  99.     int cursor_shown;
  100.     /* Double buffering */
  101.     __u8 *dbdata;
  102.     unsigned int dboffset;
  103.     unsigned int paused;
  104. } viewport_t;
  105.  
  106. #define MAX_ANIM_LEN    8
  107. #define MAX_ANIMATIONS  4
  108. typedef struct {
  109.     int initialized;
  110.     int enabled;
  111.     unsigned int vp;
  112.  
  113.     unsigned int pos;
  114.     unsigned int animlen;
  115.     unsigned int pixmaps[MAX_ANIM_LEN];
  116. } animation_t;
  117. static animation_t animations[MAX_ANIMATIONS];
  118. static int anims_enabled;
  119.  
  120. /** Maximum number of saved pixmaps
  121.  * Pixmap is a saved rectangle
  122.  */
  123. #define MAX_PIXMAPS        256
  124. typedef struct {
  125.     unsigned int width;
  126.     unsigned int height;
  127.     __u8 *data;
  128. } pixmap_t;
  129. static pixmap_t pixmaps[MAX_PIXMAPS];
  130.  
  131. /* Viewport is a rectangular area on the screen */
  132. #define MAX_VIEWPORTS 128
  133. static viewport_t viewports[128];
  134.  
  135. /* Allow only 1 connection */
  136. static int client_connected = 0;
  137.  
  138. #define RED(x, bits)    ((x >> (16 + 8 - bits)) & ((1 << bits) - 1))
  139. #define GREEN(x, bits)  ((x >> (8 + 8 - bits)) & ((1 << bits) - 1))
  140. #define BLUE(x, bits)   ((x >> (8 - bits)) & ((1 << bits) - 1))
  141.  
  142. #define COL_WIDTH   8
  143. #define ROW_BYTES   (screen.scanline * FONT_SCANLINES)
  144.  
  145. #define POINTPOS(x, y)  ((y) * screen.scanline + (x) * screen.pixelbytes)
  146.  
  147. /* Conversion routines between different color representations */
  148. static void rgb_4byte(void *dst, int rgb)
  149. {
  150.     *(int *)dst = rgb;
  151. }
  152.  
  153. static int byte4_rgb(void *src)
  154. {
  155.     return (*(int *)src) & 0xffffff;
  156. }
  157.  
  158. static void rgb_3byte(void *dst, int rgb)
  159. {
  160.     __u8 *scr = dst;
  161. #if (defined(BIG_ENDIAN) || defined(FB_BIG_ENDIAN))
  162.     scr[0] = RED(rgb, 8);
  163.     scr[1] = GREEN(rgb, 8);
  164.     scr[2] = BLUE(rgb, 8);
  165. #else
  166.     scr[2] = RED(rgb, 8);
  167.     scr[1] = GREEN(rgb, 8);
  168.     scr[0] = BLUE(rgb, 8);
  169. #endif
  170.  
  171.  
  172. }
  173.  
  174. static int byte3_rgb(void *src)
  175. {
  176.     __u8 *scr = src;
  177. #if (defined(BIG_ENDIAN) || defined(FB_BIG_ENDIAN))
  178.     return scr[0] << 16 | scr[1] << 8 | scr[2];
  179. #else
  180.     return scr[2] << 16 | scr[1] << 8 | scr[0];
  181. #endif 
  182. }
  183.  
  184. /**  16-bit depth (5:6:5) */
  185. static void rgb_2byte(void *dst, int rgb)
  186. {
  187.     /* 5-bit, 6-bits, 5-bits */
  188.     *((__u16 *)(dst)) = RED(rgb, 5) << 11 | GREEN(rgb, 6) << 5 | BLUE(rgb, 5);
  189. }
  190.  
  191. /** 16-bit depth (5:6:5) */
  192. static int byte2_rgb(void *src)
  193. {
  194.     int color = *(__u16 *)(src);
  195.     return (((color >> 11) & 0x1f) << (16 + 3)) | (((color >> 5) & 0x3f) << (8 + 2)) | ((color & 0x1f) << 3);
  196. }
  197.  
  198. /** Put pixel - 8-bit depth (3:2:3) */
  199. static void rgb_1byte(void *dst, int rgb)
  200. {
  201.     *(__u8 *)dst = RED(rgb, 3) << 5 | GREEN(rgb, 2) << 3 | BLUE(rgb, 3);
  202. }
  203.  
  204. /** Return pixel color - 8-bit depth (3:2:3) */
  205. static int byte1_rgb(void *src)
  206. {
  207.     int color = *(__u8 *)src;
  208.     return (((color >> 5) & 0x7) << (16 + 5)) | (((color >> 3) & 0x3) << (8 + 6)) | ((color & 0x7) << 5);
  209. }
  210.  
  211. /** Put pixel into viewport
  212.  *
  213.  * @param vport Viewport identification
  214.  * @param x X coord relative to viewport
  215.  * @param y Y coord relative to viewport
  216.  * @param color RGB color
  217.  */
  218. static void putpixel(viewport_t *vport, unsigned int x, unsigned int y, int color)
  219. {
  220.     int dx = vport->x + x;
  221.     int dy = vport->y + y;
  222.  
  223.     if (! (vport->paused && vport->dbdata))
  224.         (*screen.rgb2scr)(&screen.fbaddress[POINTPOS(dx,dy)],color);
  225.  
  226.     if (vport->dbdata) {
  227.         int dline = (y + vport->dboffset) % vport->height;
  228.         int doffset = screen.pixelbytes * (dline * vport->width + x);
  229.         (*screen.rgb2scr)(&vport->dbdata[doffset],color);
  230.     }
  231. }
  232.  
  233. /** Get pixel from viewport */
  234. static int getpixel(viewport_t *vport, unsigned int x, unsigned int y)
  235. {
  236.     int dx = vport->x + x;
  237.     int dy = vport->y + y;
  238.  
  239.     return (*screen.scr2rgb)(&screen.fbaddress[POINTPOS(dx,dy)]);
  240. }
  241.  
  242. static inline void putpixel_mem(char *mem, unsigned int x, unsigned int y,
  243.                 int color)
  244. {
  245.     (*screen.rgb2scr)(&mem[POINTPOS(x,y)],color);
  246. }
  247.  
  248. static void draw_rectangle(viewport_t *vport, unsigned int sx, unsigned int sy,
  249.                unsigned int width, unsigned int height,
  250.                int color)
  251. {
  252.     unsigned int x, y;
  253.     static void *tmpline;
  254.  
  255.     if (!tmpline)
  256.         tmpline = malloc(screen.scanline*screen.pixelbytes);
  257.  
  258.     /* Clear first line */
  259.     for (x = 0; x < width; x++)
  260.         putpixel_mem(tmpline, x, 0, color);
  261.  
  262.     if (!vport->paused) {
  263.         /* Recompute to screen coords */
  264.         sx += vport->x;
  265.         sy += vport->y;
  266.         /* Copy the rest */
  267.         for (y = sy;y < sy+height; y++)
  268.             memcpy(&screen.fbaddress[POINTPOS(sx,y)], tmpline,
  269.                    screen.pixelbytes * width);
  270.     }
  271.     if (vport->dbdata) {
  272.         for (y=sy;y < sy+height; y++) {
  273.             int rline = (y + vport->dboffset) % vport->height;
  274.             int rpos = (rline * vport->width + sx) * screen.pixelbytes;
  275.             memcpy(&vport->dbdata[rpos], tmpline, screen.pixelbytes * width);
  276.         }
  277.     }
  278.  
  279. }
  280.  
  281. /** Fill viewport with background color */
  282. static void clear_port(viewport_t *vport)
  283. {
  284.     draw_rectangle(vport, 0, 0, vport->width, vport->height, vport->style.bg_color);
  285. }
  286.  
  287. /** Scroll unbuffered viewport up/down
  288.  *
  289.  * @param vport Viewport to scroll
  290.  * @param lines Positive number - scroll up, negative - scroll down
  291.  */
  292. static void scroll_port_nodb(viewport_t *vport, int lines)
  293. {
  294.     int y;
  295.     int startline;
  296.     int endline;
  297.  
  298.     if (lines > 0) {
  299.         for (y=vport->y; y < vport->y+vport->height - lines; y++)
  300.             memcpy(&screen.fbaddress[POINTPOS(vport->x,y)],
  301.                    &screen.fbaddress[POINTPOS(vport->x,y + lines)],
  302.                    screen.pixelbytes * vport->width);
  303.         draw_rectangle(vport, 0, vport->height - lines,
  304.                    vport->width, lines, vport->style.bg_color);
  305.     } else if (lines < 0) {
  306.         lines = -lines;
  307.         for (y=vport->y + vport->height-1; y >= vport->y + lines; y--)
  308.             memcpy(&screen.fbaddress[POINTPOS(vport->x,y)],
  309.                    &screen.fbaddress[POINTPOS(vport->x,y - lines)],
  310.                    screen.pixelbytes * vport->width);
  311.         draw_rectangle(vport, 0, 0, vport->width, lines, vport->style.bg_color);
  312.     }
  313. }
  314.  
  315. /** Refresh given viewport from double buffer */
  316. static void refresh_viewport_db(viewport_t *vport)
  317. {
  318.     unsigned int y, srcy, srcoff, dsty, dstx;
  319.  
  320.     for (y = 0; y < vport->height; y++) {
  321.         srcy = (y + vport->dboffset) % vport->height;
  322.         srcoff = (vport->width * srcy) * screen.pixelbytes;
  323.  
  324.         dstx = vport->x;
  325.         dsty = vport->y + y;
  326.  
  327.         memcpy(&screen.fbaddress[POINTPOS(dstx,dsty)],
  328.                &vport->dbdata[srcoff],
  329.                vport->width*screen.pixelbytes);
  330.     }
  331. }
  332.  
  333. /** Scroll viewport that has double buffering enabled */
  334. static void scroll_port_db(viewport_t *vport, int lines)
  335. {
  336.     ++vport->paused;
  337.     if (lines > 0) {
  338.         draw_rectangle(vport, 0, 0, vport->width, lines,
  339.                    vport->style.bg_color);
  340.         vport->dboffset += lines;
  341.         vport->dboffset %= vport->height;
  342.     } else if (lines < 0) {
  343.         lines = -lines;
  344.         draw_rectangle(vport, 0, vport->height-lines,
  345.                    vport->width, lines,
  346.                    vport->style.bg_color);
  347.  
  348.         if (vport->dboffset < lines)
  349.             vport->dboffset += vport->height;
  350.         vport->dboffset -= lines;
  351.     }
  352.    
  353.     --vport->paused;
  354.    
  355.     refresh_viewport_db(vport);
  356. }
  357.  
  358. /** Scrolls viewport given number of lines */
  359. static void scroll_port(viewport_t *vport, int lines)
  360. {
  361.     if (vport->dbdata)
  362.         scroll_port_db(vport, lines);
  363.     else
  364.         scroll_port_nodb(vport, lines);
  365.    
  366. }
  367.  
  368. static void invert_pixel(viewport_t *vport, unsigned int x, unsigned int y)
  369. {
  370.     putpixel(vport, x, y, ~getpixel(vport, x, y));
  371. }
  372.  
  373.  
  374. /***************************************************************/
  375. /* Character-console functions */
  376.  
  377. /** Draw character at given position
  378.  *
  379.  * @param vport Viewport where the character is printed
  380.  * @param sx Coordinates of top-left of the character
  381.  * @param sy Coordinates of top-left of the character
  382.  * @param style Color of the character
  383.  * @param transparent If false, print background color
  384.  */
  385. static void draw_glyph(viewport_t *vport,__u8 glyph, unsigned int sx, unsigned int sy,
  386.                style_t style, int transparent)
  387. {
  388.     int i;
  389.     unsigned int y;
  390.     unsigned int glline;
  391.  
  392.     for (y = 0; y < FONT_SCANLINES; y++) {
  393.         glline = fb_font[glyph * FONT_SCANLINES + y];
  394.         for (i = 0; i < 8; i++) {
  395.             if (glline & (1 << (7 - i)))
  396.                 putpixel(vport, sx + i, sy + y, style.fg_color);
  397.             else if (!transparent)
  398.                 putpixel(vport, sx + i, sy + y, style.bg_color);
  399.         }
  400.     }
  401. }
  402.  
  403. /** Invert character at given position */
  404. static void invert_char(viewport_t *vport,unsigned int row, unsigned int col)
  405. {
  406.     unsigned int x;
  407.     unsigned int y;
  408.  
  409.     for (x = 0; x < COL_WIDTH; x++)
  410.         for (y = 0; y < FONT_SCANLINES; y++)
  411.             invert_pixel(vport, col * COL_WIDTH + x, row * FONT_SCANLINES + y);
  412. }
  413.  
  414. /***************************************************************/
  415. /* Stdout specific functions */
  416.  
  417.  
  418. /** Create new viewport
  419.  *
  420.  * @return New viewport number
  421.  */
  422. static int viewport_create(unsigned int x, unsigned int y,unsigned int width,
  423.                unsigned int height)
  424. {
  425.     int i;
  426.  
  427.     for (i=0; i < MAX_VIEWPORTS; i++) {
  428.         if (!viewports[i].initialized)
  429.             break;
  430.     }
  431.     if (i == MAX_VIEWPORTS)
  432.         return ELIMIT;
  433.  
  434.     viewports[i].x = x;
  435.     viewports[i].y = y;
  436.     viewports[i].width = width;
  437.     viewports[i].height = height;
  438.    
  439.     viewports[i].rows = height / FONT_SCANLINES;
  440.     viewports[i].cols = width / COL_WIDTH;
  441.  
  442.     viewports[i].style.bg_color = DEFAULT_BGCOLOR;
  443.     viewports[i].style.fg_color = DEFAULT_FGCOLOR;
  444.    
  445.     viewports[i].cur_col = 0;
  446.     viewports[i].cur_row = 0;
  447.     viewports[i].cursor_active = 0;
  448.  
  449.     viewports[i].initialized = 1;
  450.  
  451.     return i;
  452. }
  453.  
  454.  
  455. /** Initialize framebuffer as a chardev output device
  456.  *
  457.  * @param addr Address of theframebuffer
  458.  * @param xres Screen width in pixels
  459.  * @param yres Screen height in pixels
  460.  * @param bpp  Bits per pixel (8, 16, 24, 32)
  461.  * @param scan Bytes per one scanline
  462.  *
  463.  */
  464. static void screen_init(void *addr, unsigned int xres, unsigned int yres, unsigned int bpp, unsigned int scan)
  465. {
  466.     switch (bpp) {
  467.         case 8:
  468.             screen.rgb2scr = rgb_1byte;
  469.             screen.scr2rgb = byte1_rgb;
  470.             screen.pixelbytes = 1;
  471.             break;
  472.         case 16:
  473.             screen.rgb2scr = rgb_2byte;
  474.             screen.scr2rgb = byte2_rgb;
  475.             screen.pixelbytes = 2;
  476.             break;
  477.         case 24:
  478.             screen.rgb2scr = rgb_3byte;
  479.             screen.scr2rgb = byte3_rgb;
  480.             screen.pixelbytes = 3;
  481.             break;
  482.         case 32:
  483.             screen.rgb2scr = rgb_4byte;
  484.             screen.scr2rgb = byte4_rgb;
  485.             screen.pixelbytes = 4;
  486.             break;
  487.     }
  488.  
  489.        
  490.     screen.fbaddress = (unsigned char *) addr;
  491.     screen.xres = xres;
  492.     screen.yres = yres;
  493.     screen.scanline = scan;
  494.    
  495.     /* Create first viewport */
  496.     viewport_create(0,0,xres,yres);
  497. }
  498.  
  499. /** Hide cursor if it is shown */
  500. static void cursor_hide(viewport_t *vport)
  501. {
  502.     if (vport->cursor_active && vport->cursor_shown) {
  503.         invert_char(vport, vport->cur_row, vport->cur_col);
  504.         vport->cursor_shown = 0;
  505.     }
  506. }
  507.  
  508. /** Show cursor if cursor showing is enabled */
  509. static void cursor_print(viewport_t *vport)
  510. {
  511.     /* Do not check for cursor_shown */
  512.     if (vport->cursor_active) {
  513.         invert_char(vport, vport->cur_row, vport->cur_col);
  514.         vport->cursor_shown = 1;
  515.     }
  516. }
  517.  
  518. /** Invert cursor, if it is enabled */
  519. static void cursor_blink(viewport_t *vport)
  520. {
  521.     if (vport->cursor_shown)
  522.         cursor_hide(vport);
  523.     else
  524.         cursor_print(vport);
  525. }
  526.  
  527. /** Draw character at given position relative to viewport
  528.  *
  529.  * @param vport Viewport identification
  530.  * @param c Character to print
  531.  * @param row Screen position relative to viewport
  532.  * @param col Screen position relative to viewport
  533.  * @param transparent If false, print background color with character
  534.  */
  535. static void draw_char(viewport_t *vport, char c, unsigned int row, unsigned int col,
  536.               style_t style, int transparent)
  537. {
  538.     /* Optimize - do not hide cursor if we are going to overwrite it */
  539.     if (vport->cursor_active && vport->cursor_shown &&
  540.         (vport->cur_col != col || vport->cur_row != row))
  541.         invert_char(vport, vport->cur_row, vport->cur_col);
  542.    
  543.     draw_glyph(vport, c, col * COL_WIDTH, row * FONT_SCANLINES, style, transparent);
  544.  
  545.     vport->cur_col = col;
  546.     vport->cur_row = row;
  547.  
  548.     vport->cur_col++;
  549.     if (vport->cur_col>= vport->cols) {
  550.         vport->cur_col = 0;
  551.         vport->cur_row++;
  552.         if (vport->cur_row >= vport->rows)
  553.             vport->cur_row--;
  554.     }
  555.     cursor_print(vport);
  556. }
  557.  
  558. /** Draw text data to viewport
  559.  *
  560.  * @param vport Viewport id
  561.  * @param data Text data fitting exactly into viewport
  562.  */
  563. static void draw_text_data(viewport_t *vport, keyfield_t *data)
  564. {
  565.     int i;
  566.     char c;
  567.     int col,row;
  568.  
  569.     clear_port(vport);
  570.     for (i=0; i < vport->cols * vport->rows; i++) {
  571.         if (data[i].character == ' ' && style_same(data[i].style,vport->style))
  572.             continue;
  573.         col = i % vport->cols;
  574.         row = i / vport->cols;
  575.         draw_glyph(vport, data[i].character, col * COL_WIDTH, row * FONT_SCANLINES,
  576.                data[i].style, style_same(data[i].style,vport->style));
  577.     }
  578.     cursor_print(vport);
  579. }
  580.  
  581.  
  582. /** Return first free pixmap */
  583. static int find_free_pixmap(void)
  584. {
  585.     int i;
  586.    
  587.     for (i=0;i < MAX_PIXMAPS;i++)
  588.         if (!pixmaps[i].data)
  589.             return i;
  590.     return -1;
  591. }
  592.  
  593. static void putpixel_pixmap(int pm, unsigned int x, unsigned int y, int color)
  594. {
  595.     pixmap_t *pmap = &pixmaps[pm];
  596.     int pos = (y * pmap->width + x) * screen.pixelbytes;
  597.  
  598.     (*screen.rgb2scr)(&pmap->data[pos],color);
  599. }
  600.  
  601. /** Create a new pixmap and return appropriate ID */
  602. static int shm2pixmap(char *shm, size_t size)
  603. {
  604.     int pm;
  605.     pixmap_t *pmap;
  606.  
  607.     pm = find_free_pixmap();
  608.     if (pm == -1)
  609.         return ELIMIT;
  610.     pmap = &pixmaps[pm];
  611.    
  612.     if (ppm_get_data(shm, size, &pmap->width, &pmap->height))
  613.         return EINVAL;
  614.    
  615.     pmap->data = malloc(pmap->width * pmap->height * screen.pixelbytes);
  616.     if (!pmap->data)
  617.         return ENOMEM;
  618.  
  619.     ppm_draw(shm, size, 0, 0, pmap->width, pmap->height,
  620.          (putpixel_cb_t)putpixel_pixmap, (void *)pm);
  621.  
  622.     return pm;
  623. }
  624.  
  625. /** Handle shared memory communication calls
  626.  *
  627.  * Protocol for drawing pixmaps:
  628.  * - FB_PREPARE_SHM(client shm identification)
  629.  * - IPC_M_SEND_AS_AREA
  630.  * - FB_DRAW_PPM(startx,starty)
  631.  * - FB_DROP_SHM
  632.  *
  633.  * Protocol for text drawing
  634.  * - IPC_M_SEND_AS_AREA
  635.  * - FB_DRAW_TEXT_DATA
  636.  *
  637.  * @param callid Callid of the current call
  638.  * @param call Current call data
  639.  * @param vp Active viewport
  640.  * @return 0 if the call was not handled byt this function, 1 otherwise
  641.  *
  642.  * note: this function is not threads safe, you would have
  643.  * to redefine static variables with __thread
  644.  */
  645. static int shm_handle(ipc_callid_t callid, ipc_call_t *call, int vp)
  646. {
  647.     static keyfield_t *interbuffer = NULL;
  648.     static size_t intersize = 0;
  649.  
  650.     static char *shm = NULL;
  651.     static ipcarg_t shm_id = 0;
  652.     static size_t shm_size;
  653.  
  654.     int handled = 1;
  655.     int retval = 0;
  656.     viewport_t *vport = &viewports[vp];
  657.     unsigned int x,y;
  658.  
  659.     switch (IPC_GET_METHOD(*call)) {
  660.     case IPC_M_AS_AREA_SEND:
  661.         /* We accept one area for data interchange */
  662.         if (IPC_GET_ARG1(*call) == shm_id) {
  663.             void *dest = as_get_mappable_page(IPC_GET_ARG2(*call));
  664.             shm_size = IPC_GET_ARG2(*call);
  665.             if (!ipc_answer_fast(callid, 0, (sysarg_t)dest, 0))
  666.                 shm = dest;
  667.             else
  668.                 shm_id = 0;
  669.             if (shm[0] != 'P')
  670.                 while (1)
  671.                     ;
  672.             return 1;
  673.         } else {
  674.             intersize = IPC_GET_ARG2(*call);
  675.             receive_comm_area(callid,call,(void **)&interbuffer);
  676.         }
  677.         return 1;
  678.     case FB_PREPARE_SHM:
  679.         if (shm_id)
  680.             retval = EBUSY;
  681.         else
  682.             shm_id = IPC_GET_ARG1(*call);
  683.         break;
  684.        
  685.     case FB_DROP_SHM:
  686.         if (shm) {
  687.             as_area_destroy(shm);
  688.             shm = NULL;
  689.         }
  690.         shm_id = 0;
  691.         break;
  692.  
  693.     case FB_SHM2PIXMAP:
  694.         if (!shm) {
  695.             retval = EINVAL;
  696.             break;
  697.         }
  698.         retval = shm2pixmap(shm, shm_size);
  699.         break;
  700.     case FB_DRAW_PPM:
  701.         if (!shm) {
  702.             retval = EINVAL;
  703.             break;
  704.         }
  705.         x = IPC_GET_ARG1(*call);
  706.         y = IPC_GET_ARG2(*call);
  707.         if (x > vport->width || y > vport->height) {
  708.             retval = EINVAL;
  709.             break;
  710.         }
  711.        
  712.         ppm_draw(shm, shm_size, IPC_GET_ARG1(*call), IPC_GET_ARG2(*call),
  713.              vport->width - x, vport->height - y, (putpixel_cb_t)putpixel, vport);
  714.         break;
  715.     case FB_DRAW_TEXT_DATA:
  716.         if (!interbuffer) {
  717.             retval = EINVAL;
  718.             break;
  719.         }
  720.         if (intersize < vport->cols*vport->rows*sizeof(*interbuffer)) {
  721.             retval = EINVAL;
  722.             break;
  723.         }
  724.         draw_text_data(vport, interbuffer);
  725.         break;
  726.     default:
  727.         handled = 0;
  728.     }
  729.    
  730.     if (handled)
  731.         ipc_answer_fast(callid, retval, 0, 0);
  732.     return handled;
  733. }
  734.  
  735. static void copy_vp_to_pixmap(viewport_t *vport, pixmap_t *pmap)
  736. {
  737.     int x,y;
  738.     int rowsize;
  739.     int tmp;
  740.     int width = vport->width;
  741.     int height = vport->height;
  742.  
  743.     if (width + vport->x > screen.xres)
  744.         width = screen.xres - vport->x;
  745.     if (height + vport->y  > screen.yres)
  746.         height = screen.yres - vport->y;
  747.  
  748.     rowsize = width * screen.pixelbytes;
  749.  
  750.     for (y=0;y < height; y++) {
  751.         tmp = (vport->y + y) * screen.scanline + vport->x * screen.pixelbytes;
  752.         memcpy(pmap->data + rowsize*y, screen.fbaddress + tmp, rowsize);
  753.     }
  754. }
  755.  
  756. /** Save viewport to pixmap */
  757. static int save_vp_to_pixmap(viewport_t *vport)
  758. {
  759.     int pm;
  760.     pixmap_t *pmap;
  761.  
  762.     pm = find_free_pixmap();
  763.     if (pm == -1)
  764.         return ELIMIT;
  765.    
  766.     pmap = &pixmaps[pm];
  767.     pmap->data = malloc(screen.pixelbytes * vport->width * vport->height);
  768.     if (!pmap->data)
  769.         return ENOMEM;
  770.  
  771.     pmap->width = vport->width;
  772.     pmap->height = vport->height;
  773.  
  774.     copy_vp_to_pixmap(vport, pmap);
  775.    
  776.     return pm;
  777. }
  778.  
  779. /** Draw pixmap on screen
  780.  *
  781.  * @param vp Viewport to draw on
  782.  * @param pm Pixmap identifier
  783.  */
  784. static int draw_pixmap(int vp, int pm)
  785. {
  786.     pixmap_t *pmap = &pixmaps[pm];
  787.     viewport_t *vport = &viewports[vp];
  788.     int x,y;
  789.     int tmp, srcrowsize;
  790.     int realwidth, realheight, realrowsize;
  791.     int width = vport->width;
  792.     int height = vport->height;
  793.  
  794.     if (width + vport->x > screen.xres)
  795.         width = screen.xres - vport->x;
  796.     if (height + vport->y > screen.yres)
  797.         height = screen.yres - vport->y;
  798.  
  799.     if (!pmap->data)
  800.         return EINVAL;
  801.  
  802.     realwidth = pmap->width <= width ? pmap->width : width;
  803.     realheight = pmap->height <= height ? pmap->height : height;
  804.  
  805.     srcrowsize = vport->width * screen.pixelbytes;
  806.     realrowsize = realwidth * screen.pixelbytes;
  807.  
  808.     for (y=0; y < realheight; y++) {
  809.         tmp = (vport->y + y) * screen.scanline + vport->x * screen.pixelbytes;
  810.         memcpy(screen.fbaddress + tmp, pmap->data + y * srcrowsize, realrowsize);
  811.     }
  812.     return 0;
  813. }
  814.  
  815. /** Tick animation one step forward */
  816. static void anims_tick(void)
  817. {
  818.     int i;
  819.     static int counts = 0;
  820.    
  821.     /* Limit redrawing */
  822.     counts = (counts+1) % 8;
  823.     if (counts)
  824.         return;
  825.  
  826.     for (i=0; i < MAX_ANIMATIONS; i++) {
  827.         if (!animations[i].animlen || !animations[i].initialized || !animations[i].enabled)
  828.             continue;
  829.         draw_pixmap(animations[i].vp, animations[i].pixmaps[animations[i].pos]);
  830.         animations[i].pos = (animations[i].pos+1) % animations[i].animlen;
  831.     }
  832. }
  833.  
  834.  
  835. static int pointer_x, pointer_y;
  836. static int pointer_shown;
  837. static int pointer_vport = -1;
  838. static int pointer_pixmap = -1;
  839.  
  840. static void mouse_show(void)
  841. {
  842.     int i,j;
  843.     int visibility;
  844.     int color;
  845.     int bytepos;
  846.  
  847.     /* Save image under the cursor */
  848.     if (pointer_vport == -1) {
  849.         pointer_vport = viewport_create(pointer_x, pointer_y, pointer_width, pointer_height);
  850.         if (pointer_vport < 0)
  851.             return;
  852.     } else {
  853.         viewports[pointer_vport].x = pointer_x;
  854.         viewports[pointer_vport].y = pointer_y;
  855.     }
  856.  
  857.     if (pointer_pixmap == -1)
  858.         pointer_pixmap = save_vp_to_pixmap(&viewports[pointer_vport]);
  859.     else
  860.         copy_vp_to_pixmap(&viewports[pointer_vport], &pixmaps[pointer_pixmap]);
  861.  
  862.     /* Draw cursor */
  863.     for (i=0; i < pointer_height; i++)
  864.         for (j=0;j < pointer_width; j++) {
  865.             bytepos = i*((pointer_width-1)/8+1) + j/8;
  866.             visibility = pointer_mask_bits[bytepos] & (1 << (j % 8));
  867.             if (visibility) {
  868.                 color = pointer_bits[bytepos] & (1 << (j % 8)) ? 0 : 0xffffff;
  869.                 if (pointer_x+j < screen.xres && pointer_y+i < screen.yres)
  870.                     putpixel(&viewports[0], pointer_x+j, pointer_y+i, color);
  871.             }
  872.         }
  873.     pointer_shown = 1;
  874. }
  875.  
  876. static void mouse_hide(void)
  877. {
  878.     /* Restore image under the cursor */
  879.     if (pointer_shown) {
  880.         draw_pixmap(pointer_vport, pointer_pixmap);
  881.         pointer_shown = 0;
  882.     }
  883. }
  884.  
  885. static void mouse_move(unsigned int x, unsigned int y)
  886. {
  887.     mouse_hide();
  888.     pointer_x = x;
  889.     pointer_y = y;
  890.     mouse_show();
  891. }
  892.  
  893. static int anim_handle(ipc_callid_t callid, ipc_call_t *call, int vp)
  894. {
  895.     int handled = 1;
  896.     int retval = 0;
  897.     int i,nvp;
  898.     int newval;
  899.  
  900.     switch (IPC_GET_METHOD(*call)) {
  901.     case FB_ANIM_CREATE:
  902.         nvp = IPC_GET_ARG1(*call);
  903.         if (nvp == -1)
  904.             nvp = vp;
  905.         if (nvp >= MAX_VIEWPORTS || nvp < 0 || !viewports[nvp].initialized) {
  906.             retval = EINVAL;
  907.             break;
  908.         }
  909.         for (i=0; i < MAX_ANIMATIONS; i++) {
  910.             if (! animations[i].initialized)
  911.                 break;
  912.         }
  913.         if (i == MAX_ANIMATIONS) {
  914.             retval = ELIMIT;
  915.             break;
  916.         }
  917.         animations[i].initialized = 1;
  918.         animations[i].animlen = 0;
  919.         animations[i].pos = 0;
  920.         animations[i].enabled = 0;
  921.         animations[i].vp = nvp;
  922.         retval = i;
  923.         break;
  924.     case FB_ANIM_DROP:
  925.         i = IPC_GET_ARG1(*call);
  926.         if (nvp >= MAX_ANIMATIONS || i < 0) {
  927.             retval = EINVAL;
  928.             break;
  929.         }
  930.         animations[i].initialized = 0;
  931.         break;
  932.     case FB_ANIM_ADDPIXMAP:
  933.         i = IPC_GET_ARG1(*call);
  934.         if (i >= MAX_ANIMATIONS || i < 0 || !animations[i].initialized) {
  935.             retval = EINVAL;
  936.             break;
  937.         }
  938.         if (animations[i].animlen == MAX_ANIM_LEN) {
  939.             retval = ELIMIT;
  940.             break;
  941.         }
  942.         newval = IPC_GET_ARG2(*call);
  943.         if (newval < 0 || newval > MAX_PIXMAPS || !pixmaps[newval].data) {
  944.             retval = EINVAL;
  945.             break;
  946.         }
  947.         animations[i].pixmaps[animations[i].animlen++] = newval;
  948.         break;
  949.     case FB_ANIM_CHGVP:
  950.         i = IPC_GET_ARG1(*call);
  951.         if (i >= MAX_ANIMATIONS || i < 0) {
  952.             retval = EINVAL;
  953.             break;
  954.         }
  955.         nvp = IPC_GET_ARG2(*call);
  956.         if (nvp == -1)
  957.             nvp = vp;
  958.         if (nvp >= MAX_VIEWPORTS || nvp < 0 || !viewports[nvp].initialized) {
  959.             retval = EINVAL;
  960.             break;
  961.         }
  962.         animations[i].vp = nvp;
  963.         break;
  964.     case FB_ANIM_START:
  965.     case FB_ANIM_STOP:
  966.         i = IPC_GET_ARG1(*call);
  967.         if (i >= MAX_ANIMATIONS || i < 0) {
  968.             retval = EINVAL;
  969.             break;
  970.         }
  971.         newval = (IPC_GET_METHOD(*call) == FB_ANIM_START);
  972.         if (newval ^ animations[i].enabled) {
  973.             animations[i].enabled = newval;
  974.             anims_enabled += newval ? 1 : -1;
  975.         }
  976.         break;
  977.     default:
  978.         handled = 0;
  979.     }
  980.     if (handled)
  981.         ipc_answer_fast(callid, retval, 0, 0);
  982.     return handled;
  983. }
  984.  
  985. /** Handler for messages concerning pixmap handling */
  986. static int pixmap_handle(ipc_callid_t callid, ipc_call_t *call, int vp)
  987. {
  988.     int handled = 1;
  989.     int retval = 0;
  990.     int i,nvp;
  991.  
  992.     switch (IPC_GET_METHOD(*call)) {
  993.     case FB_VP_DRAW_PIXMAP:
  994.         nvp = IPC_GET_ARG1(*call);
  995.         if (nvp == -1)
  996.             nvp = vp;
  997.         if (nvp < 0 || nvp >= MAX_VIEWPORTS || !viewports[nvp].initialized) {
  998.             retval = EINVAL;
  999.             break;
  1000.         }
  1001.         i = IPC_GET_ARG2(*call);
  1002.         retval = draw_pixmap(nvp, i);
  1003.         break;
  1004.     case FB_VP2PIXMAP:
  1005.         nvp = IPC_GET_ARG1(*call);
  1006.         if (nvp == -1)
  1007.             nvp = vp;
  1008.         if (nvp < 0 || nvp >= MAX_VIEWPORTS || !viewports[nvp].initialized)
  1009.             retval = EINVAL;
  1010.         else
  1011.             retval = save_vp_to_pixmap(&viewports[nvp]);
  1012.         break;
  1013.     case FB_DROP_PIXMAP:
  1014.         i = IPC_GET_ARG1(*call);
  1015.         if (i >= MAX_PIXMAPS) {
  1016.             retval = EINVAL;
  1017.             break;
  1018.         }
  1019.         if (pixmaps[i].data) {
  1020.             free(pixmaps[i].data);
  1021.             pixmaps[i].data = NULL;
  1022.         }
  1023.         break;
  1024.     default:
  1025.         handled = 0;
  1026.     }
  1027.  
  1028.     if (handled)
  1029.         ipc_answer_fast(callid, retval, 0, 0);
  1030.     return handled;
  1031.    
  1032. }
  1033.  
  1034. /** Function for handling connections to FB
  1035.  *
  1036.  */
  1037. static void fb_client_connection(ipc_callid_t iid, ipc_call_t *icall)
  1038. {
  1039.     ipc_callid_t callid;
  1040.     ipc_call_t call;
  1041.     int retval;
  1042.     int i;
  1043.     unsigned int row,col;
  1044.     char c;
  1045.  
  1046.     int vp = 0;
  1047.     viewport_t *vport = &viewports[0];
  1048.  
  1049.     if (client_connected) {
  1050.         ipc_answer_fast(iid, ELIMIT, 0,0);
  1051.         return;
  1052.     }
  1053.     client_connected = 1;
  1054.     ipc_answer_fast(iid, 0, 0, 0); /* Accept connection */
  1055.  
  1056.     while (1) {
  1057.         if (vport->cursor_active || anims_enabled)
  1058.             callid = async_get_call_timeout(&call,250000);
  1059.         else
  1060.             callid = async_get_call(&call);
  1061.  
  1062.         if (!callid) {
  1063.             cursor_blink(vport);
  1064.             anims_tick();
  1065.             continue;
  1066.         }
  1067.         if (shm_handle(callid, &call, vp))
  1068.             continue;
  1069.         if (pixmap_handle(callid, &call, vp))
  1070.             continue;
  1071.         if (anim_handle(callid, &call, vp))
  1072.             continue;
  1073.  
  1074.         switch (IPC_GET_METHOD(call)) {
  1075.         case IPC_M_PHONE_HUNGUP:
  1076.             client_connected = 0;
  1077.             /* cleanup other viewports */
  1078.             for (i=1; i < MAX_VIEWPORTS; i++)
  1079.                 vport->initialized = 0;
  1080.             return; /* Exit thread */
  1081.  
  1082.         case FB_PUTCHAR:
  1083.         case FB_TRANS_PUTCHAR:
  1084.             c = IPC_GET_ARG1(call);
  1085.             row = IPC_GET_ARG2(call);
  1086.             col = IPC_GET_ARG3(call);
  1087.             if (row >= vport->rows || col >= vport->cols) {
  1088.                 retval = EINVAL;
  1089.                 break;
  1090.             }
  1091.             ipc_answer_fast(callid,0,0,0);
  1092.  
  1093.             draw_char(vport, c, row, col, vport->style, IPC_GET_METHOD(call) == FB_TRANS_PUTCHAR);
  1094.             continue; /* msg already answered */
  1095.         case FB_CLEAR:
  1096.             clear_port(vport);
  1097.             cursor_print(vport);
  1098.             retval = 0;
  1099.             break;
  1100.         case FB_CURSOR_GOTO:
  1101.             row = IPC_GET_ARG1(call);
  1102.             col = IPC_GET_ARG2(call);
  1103.             if (row >= vport->rows || col >= vport->cols) {
  1104.                 retval = EINVAL;
  1105.                 break;
  1106.             }
  1107.             retval = 0;
  1108.             cursor_hide(vport);
  1109.             vport->cur_col = col;
  1110.             vport->cur_row = row;
  1111.             cursor_print(vport);
  1112.             break;
  1113.         case FB_CURSOR_VISIBILITY:
  1114.             cursor_hide(vport);
  1115.             vport->cursor_active = IPC_GET_ARG1(call);
  1116.             cursor_print(vport);
  1117.             retval = 0;
  1118.             break;
  1119.         case FB_GET_CSIZE:
  1120.             ipc_answer_fast(callid, 0, vport->rows, vport->cols);
  1121.             continue;
  1122.         case FB_SCROLL:
  1123.             i = IPC_GET_ARG1(call);
  1124.             if (i > vport->rows || i < (- (int)vport->rows)) {
  1125.                 retval = EINVAL;
  1126.                 break;
  1127.             }
  1128.             cursor_hide(vport);
  1129.             scroll_port(vport, i*FONT_SCANLINES);
  1130.             cursor_print(vport);
  1131.             retval = 0;
  1132.             break;
  1133.         case FB_VIEWPORT_DB:
  1134.             /* Enable double buffering */
  1135.             i = IPC_GET_ARG1(call);
  1136.             if (i == -1)
  1137.                 i = vp;
  1138.             if (i < 0 || i >= MAX_VIEWPORTS) {
  1139.                 retval = EINVAL;
  1140.                 break;
  1141.             }
  1142.             if (! viewports[i].initialized ) {
  1143.                 while (1)
  1144.                     ;
  1145.                 retval = EADDRNOTAVAIL;
  1146.                 break;
  1147.             }
  1148.             viewports[i].dboffset = 0;
  1149.             if (IPC_GET_ARG2(call) == 1 && !viewports[i].dbdata)
  1150.                 viewports[i].dbdata = malloc(screen.pixelbytes*viewports[i].width * viewports[i].height);
  1151.             else if (IPC_GET_ARG2(call) == 0 && viewports[i].dbdata) {
  1152.                 free(viewports[i].dbdata);
  1153.                 viewports[i].dbdata = NULL;
  1154.             }
  1155.             retval = 0;
  1156.             break;
  1157.         case FB_VIEWPORT_SWITCH:
  1158.             i = IPC_GET_ARG1(call);
  1159.             if (i < 0 || i >= MAX_VIEWPORTS) {
  1160.                 retval = EINVAL;
  1161.                 break;
  1162.             }
  1163.             if (! viewports[i].initialized ) {
  1164.                 retval = EADDRNOTAVAIL;
  1165.                 break;
  1166.             }
  1167.             cursor_hide(vport);
  1168.             vp = i;
  1169.             vport = &viewports[vp];
  1170.             cursor_print(vport);
  1171.             retval = 0;
  1172.             break;
  1173.         case FB_VIEWPORT_CREATE:
  1174.             retval = viewport_create(IPC_GET_ARG1(call) >> 16,
  1175.                          IPC_GET_ARG1(call) & 0xffff,
  1176.                          IPC_GET_ARG2(call) >> 16,
  1177.                          IPC_GET_ARG2(call) & 0xffff);
  1178.             break;
  1179.         case FB_VIEWPORT_DELETE:
  1180.             i = IPC_GET_ARG1(call);
  1181.             if (i < 0 || i >= MAX_VIEWPORTS) {
  1182.                 retval = EINVAL;
  1183.                 break;
  1184.             }
  1185.             if (! viewports[i].initialized ) {
  1186.                 retval = EADDRNOTAVAIL;
  1187.                 break;
  1188.             }
  1189.             viewports[i].initialized = 0;
  1190.             if (viewports[i].dbdata) {
  1191.                 free(viewports[i].dbdata);
  1192.                 viewports[i].dbdata = NULL;
  1193.             }
  1194.             retval = 0;
  1195.             break;
  1196.         case FB_SET_STYLE:
  1197.             vport->style.fg_color = IPC_GET_ARG1(call);
  1198.             vport->style.bg_color = IPC_GET_ARG2(call);
  1199.             retval = 0;
  1200.             break;
  1201.         case FB_GET_RESOLUTION:
  1202.             ipc_answer_fast(callid, 0, screen.xres,screen.yres);
  1203.             continue;
  1204.         case FB_POINTER_MOVE:
  1205.             mouse_move(IPC_GET_ARG1(call), IPC_GET_ARG2(call));
  1206.             break;
  1207.         default:
  1208.             retval = ENOENT;
  1209.         }
  1210.         ipc_answer_fast(callid,retval,0,0);
  1211.     }
  1212. }
  1213.  
  1214. /** Initialization of framebuffer */
  1215. int fb_init(void)
  1216. {
  1217.     void *fb_ph_addr;
  1218.     unsigned int fb_width;
  1219.     unsigned int fb_height;
  1220.     unsigned int fb_bpp;
  1221.     unsigned int fb_scanline;
  1222.     void *fb_addr;
  1223.     size_t asz;
  1224.  
  1225.     async_set_client_connection(fb_client_connection);
  1226.  
  1227.     fb_ph_addr=(void *)sysinfo_value("fb.address.physical");
  1228.     fb_width=sysinfo_value("fb.width");
  1229.     fb_height=sysinfo_value("fb.height");
  1230.     fb_bpp=sysinfo_value("fb.bpp");
  1231.     fb_scanline=sysinfo_value("fb.scanline");
  1232.  
  1233.     asz = fb_scanline*fb_height;
  1234.     fb_addr = as_get_mappable_page(asz);
  1235.    
  1236.     map_physmem(fb_ph_addr, fb_addr, ALIGN_UP(asz,PAGE_SIZE) >>PAGE_WIDTH,
  1237.             AS_AREA_READ | AS_AREA_WRITE | AS_AREA_CACHEABLE);
  1238.    
  1239.     screen_init(fb_addr, fb_width, fb_height, fb_bpp, fb_scanline);
  1240.  
  1241.     return 0;
  1242. }
  1243.  
  1244.  
  1245. /**
  1246.  * @}
  1247.  */
  1248.