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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. #define DEFAULT_BGCOLOR                0xf0f0f0
  65. #define DEFAULT_FGCOLOR                0x0
  66.  
  67. /***************************************************************/
  68. /* Pixel specific fuctions */
  69.  
  70. typedef void (*conv2scr_fn_t)(void *, int);
  71. typedef int (*conv2rgb_fn_t)(void *);
  72.  
  73. struct {
  74.     __u8 *fbaddress ;
  75.  
  76.     unsigned int xres ;
  77.     unsigned int yres ;
  78.     unsigned int scanline ;
  79.     unsigned int pixelbytes ;
  80.  
  81.     conv2scr_fn_t rgb2scr;
  82.     conv2rgb_fn_t scr2rgb;
  83. } screen;
  84.  
  85. typedef struct {
  86.     int initialized;
  87.     unsigned int x, y;
  88.     unsigned int width, height;
  89.  
  90.     /* Text support in window */
  91.     unsigned int rows, cols;
  92.     /* Style for text printing */
  93.     style_t style;
  94.     /* Auto-cursor position */
  95.     int cursor_active, cur_col, cur_row;
  96.     int cursor_shown;
  97. } viewport_t;
  98.  
  99. #define MAX_ANIM_LEN    8
  100. #define MAX_ANIMATIONS  4
  101. typedef struct {
  102.     int initialized;
  103.     int enabled;
  104.     unsigned int vp;
  105.  
  106.     unsigned int pos;
  107.     unsigned int animlen;
  108.     unsigned int pixmaps[MAX_ANIM_LEN];
  109. } animation_t;
  110. static animation_t animations[MAX_ANIMATIONS];
  111. static int anims_enabled;
  112.  
  113. /** Maximum number of saved pixmaps
  114.  * Pixmap is a saved rectangle
  115.  */
  116. #define MAX_PIXMAPS        256
  117. typedef struct {
  118.     unsigned int width;
  119.     unsigned int height;
  120.     __u8 *data;
  121. } pixmap_t;
  122. static pixmap_t pixmaps[MAX_PIXMAPS];
  123.  
  124. /* Viewport is a rectangular area on the screen */
  125. #define MAX_VIEWPORTS 128
  126. static viewport_t viewports[128];
  127.  
  128. /* Allow only 1 connection */
  129. static int client_connected = 0;
  130.  
  131. #define RED(x, bits)    ((x >> (16 + 8 - bits)) & ((1 << bits) - 1))
  132. #define GREEN(x, bits)  ((x >> (8 + 8 - bits)) & ((1 << bits) - 1))
  133. #define BLUE(x, bits)   ((x >> (8 - bits)) & ((1 << bits) - 1))
  134.  
  135. #define COL_WIDTH   8
  136. #define ROW_BYTES   (screen.scanline * FONT_SCANLINES)
  137.  
  138. #define POINTPOS(x, y)  ((y) * screen.scanline + (x) * screen.pixelbytes)
  139.  
  140. /* Conversion routines between different color representations */
  141. static void rgb_4byte(void *dst, int rgb)
  142. {
  143.     *(int *)dst = rgb;
  144. }
  145.  
  146. static int byte4_rgb(void *src)
  147. {
  148.     return (*(int *)src) & 0xffffff;
  149. }
  150.  
  151. static void rgb_3byte(void *dst, int rgb)
  152. {
  153.     __u8 *scr = dst;
  154. #if (defined(BIG_ENDIAN) || defined(FB_BIG_ENDIAN))
  155.     scr[0] = RED(rgb, 8);
  156.     scr[1] = GREEN(rgb, 8);
  157.     scr[2] = BLUE(rgb, 8);
  158. #else
  159.     scr[2] = RED(rgb, 8);
  160.     scr[1] = GREEN(rgb, 8);
  161.     scr[0] = BLUE(rgb, 8);
  162. #endif
  163.  
  164.  
  165. }
  166.  
  167. static int byte3_rgb(void *src)
  168. {
  169.     __u8 *scr = src;
  170. #if (defined(BIG_ENDIAN) || defined(FB_BIG_ENDIAN))
  171.     return scr[0] << 16 | scr[1] << 8 | scr[2];
  172. #else
  173.     return scr[2] << 16 | scr[1] << 8 | scr[0];
  174. #endif 
  175. }
  176.  
  177. /**  16-bit depth (5:6:5) */
  178. static void rgb_2byte(void *dst, int rgb)
  179. {
  180.     /* 5-bit, 6-bits, 5-bits */
  181.     *((__u16 *)(dst)) = RED(rgb, 5) << 11 | GREEN(rgb, 6) << 5 | BLUE(rgb, 5);
  182. }
  183.  
  184. /** 16-bit depth (5:6:5) */
  185. static int byte2_rgb(void *src)
  186. {
  187.     int color = *(__u16 *)(src);
  188.     return (((color >> 11) & 0x1f) << (16 + 3)) | (((color >> 5) & 0x3f) << (8 + 2)) | ((color & 0x1f) << 3);
  189. }
  190.  
  191. /** Put pixel - 8-bit depth (3:2:3) */
  192. static void rgb_1byte(void *dst, int rgb)
  193. {
  194.     *(__u8 *)dst = RED(rgb, 3) << 5 | GREEN(rgb, 2) << 3 | BLUE(rgb, 3);
  195. }
  196.  
  197. /** Return pixel color - 8-bit depth (3:2:3) */
  198. static int byte1_rgb(void *src)
  199. {
  200.     int color = *(__u8 *)src;
  201.     return (((color >> 5) & 0x7) << (16 + 5)) | (((color >> 3) & 0x3) << (8 + 6)) | ((color & 0x7) << 5);
  202. }
  203.  
  204. /** Put pixel into viewport
  205.  *
  206.  * @param vp Viewport identification
  207.  * @param x X coord relative to viewport
  208.  * @param y Y coord relative to viewport
  209.  * @param color RGB color
  210.  */
  211. static void putpixel(int vp, unsigned int x, unsigned int y, int color)
  212. {
  213.     int dx = viewports[vp].x + x;
  214.     int dy = viewports[vp].y + y;
  215.     (*screen.rgb2scr)(&screen.fbaddress[POINTPOS(dx,dy)],color);
  216. }
  217. /** Get pixel from viewport */
  218. static int getpixel(int vp, unsigned int x, unsigned int y)
  219. {
  220.     int dx = viewports[vp].x + x;
  221.     int dy = viewports[vp].y + y;
  222.  
  223.     return (*screen.scr2rgb)(&screen.fbaddress[POINTPOS(dx,dy)]);
  224. }
  225.  
  226. /** Fill line with color BGCOLOR */
  227. static void clear_line(int vp, unsigned int y)
  228. {
  229.     unsigned int x;
  230.     for (x = 0; x < viewports[vp].width; x++)
  231.         putpixel(vp, x, y, viewports[vp].style.bg_color);
  232. }
  233.  
  234. static void draw_rectangle(int vp, unsigned int sx, unsigned int sy,
  235.                unsigned int width, unsigned int height,
  236.                int color)
  237. {
  238.     unsigned int x, y;
  239.  
  240.     /* Clear first line */
  241.     for (x = 0; x < width; x++)
  242.         putpixel(vp, sx + x, sy, color);
  243.  
  244.     /* Recompute to screen coords */
  245.     sx += viewports[vp].x;
  246.     sy += viewports[vp].y;
  247.     /* Copy the rest */
  248.     for (y = sy+1;y < sy+height; y++)
  249.         memcpy(&screen.fbaddress[POINTPOS(sx,y)],
  250.                &screen.fbaddress[POINTPOS(sx,sy)],
  251.                screen.pixelbytes * width);
  252.  
  253. }
  254.  
  255. /** Fill viewport with background color */
  256. static void clear_port(int vp)
  257. {
  258.     viewport_t *vport = &viewports[vp];
  259.  
  260.     draw_rectangle(vp, 0, 0, vport->width, vport->height, vport->style.bg_color);
  261. }
  262.  
  263. /** Scroll port up/down
  264.  *
  265.  * @param vp Viewport to scroll
  266.  * @param rows Positive number - scroll up, negative - scroll down
  267.  */
  268. static void scroll_port(int vp, int rows)
  269. {
  270.     int y;
  271.     int startline;
  272.     int endline;
  273.     viewport_t *vport = &viewports[vp];
  274.    
  275.     if (rows > 0) {
  276.         for (y=vport->y; y < vport->y+vport->height - rows*FONT_SCANLINES; y++)
  277.             memcpy(&screen.fbaddress[POINTPOS(vport->x,y)],
  278.                    &screen.fbaddress[POINTPOS(vport->x,y + rows*FONT_SCANLINES)],
  279.                    screen.pixelbytes * vport->width);
  280.         draw_rectangle(vp, 0, FONT_SCANLINES*(vport->rows - 1),
  281.                    vport->width, FONT_SCANLINES, vport->style.bg_color);
  282.     } else if (rows < 0) {
  283.         rows = -rows;
  284.         for (y=vport->y + vport->height-1; y >= vport->y + rows*FONT_SCANLINES; y--)
  285.             memcpy(&screen.fbaddress[POINTPOS(vport->x,y)],
  286.                 &screen.fbaddress[POINTPOS(vport->x,y - rows*FONT_SCANLINES)],
  287.                 screen.pixelbytes * vport->width);
  288.         draw_rectangle(vp, 0, 0, vport->width, FONT_SCANLINES, vport->style.bg_color);
  289.     }
  290. }
  291.  
  292. static void invert_pixel(int vp,unsigned int x, unsigned int y)
  293. {
  294.     putpixel(vp, x, y, ~getpixel(vp, x, y));
  295. }
  296.  
  297.  
  298. /***************************************************************/
  299. /* Character-console functions */
  300.  
  301. /** Draw character at given position
  302.  *
  303.  * @param vp Viewport where the character is printed
  304.  * @param sx Coordinates of top-left of the character
  305.  * @param sy Coordinates of top-left of the character
  306.  * @param style Color of the character
  307.  * @param transparent If false, print background color
  308.  */
  309. static void draw_glyph(int vp,__u8 glyph, unsigned int sx, unsigned int sy,
  310.                style_t style, int transparent)
  311. {
  312.     int i;
  313.     unsigned int y;
  314.     unsigned int glline;
  315.  
  316.     for (y = 0; y < FONT_SCANLINES; y++) {
  317.         glline = fb_font[glyph * FONT_SCANLINES + y];
  318.         for (i = 0; i < 8; i++) {
  319.             if (glline & (1 << (7 - i)))
  320.                 putpixel(vp, sx + i, sy + y, style.fg_color);
  321.             else if (!transparent)
  322.                 putpixel(vp, sx + i, sy + y, style.bg_color);
  323.         }
  324.     }
  325. }
  326.  
  327. /** Invert character at given position */
  328. static void invert_char(int vp,unsigned int row, unsigned int col)
  329. {
  330.     unsigned int x;
  331.     unsigned int y;
  332.  
  333.     for (x = 0; x < COL_WIDTH; x++)
  334.         for (y = 0; y < FONT_SCANLINES; y++)
  335.             invert_pixel(vp, col * COL_WIDTH + x, row * FONT_SCANLINES + y);
  336. }
  337.  
  338. /***************************************************************/
  339. /* Stdout specific functions */
  340.  
  341.  
  342. /** Create new viewport
  343.  *
  344.  * @return New viewport number
  345.  */
  346. static int viewport_create(unsigned int x, unsigned int y,unsigned int width,
  347.                unsigned int height)
  348. {
  349.     int i;
  350.  
  351.     for (i=0; i < MAX_VIEWPORTS; i++) {
  352.         if (!viewports[i].initialized)
  353.             break;
  354.     }
  355.     if (i == MAX_VIEWPORTS)
  356.         return ELIMIT;
  357.  
  358.     if (width ==0 || height == 0 ||
  359.         x+width > screen.xres || y+height > screen.yres)
  360.         return EINVAL;
  361.     if (width < FONT_SCANLINES || height < COL_WIDTH)
  362.         return EINVAL;
  363.  
  364.     viewports[i].x = x;
  365.     viewports[i].y = y;
  366.     viewports[i].width = width;
  367.     viewports[i].height = height;
  368.    
  369.     viewports[i].rows = height / FONT_SCANLINES;
  370.     viewports[i].cols = width / COL_WIDTH;
  371.  
  372.     viewports[i].style.bg_color = DEFAULT_BGCOLOR;
  373.     viewports[i].style.fg_color = DEFAULT_FGCOLOR;
  374.    
  375.     viewports[i].cur_col = 0;
  376.     viewports[i].cur_row = 0;
  377.     viewports[i].cursor_active = 0;
  378.  
  379.     viewports[i].initialized = 1;
  380.  
  381.     return i;
  382. }
  383.  
  384.  
  385. /** Initialize framebuffer as a chardev output device
  386.  *
  387.  * @param addr Address of theframebuffer
  388.  * @param x    Screen width in pixels
  389.  * @param y    Screen height in pixels
  390.  * @param bpp  Bits per pixel (8, 16, 24, 32)
  391.  * @param scan Bytes per one scanline
  392.  *
  393.  */
  394. static void screen_init(void *addr, unsigned int xres, unsigned int yres, unsigned int bpp, unsigned int scan)
  395. {
  396.     switch (bpp) {
  397.         case 8:
  398.             screen.rgb2scr = rgb_1byte;
  399.             screen.scr2rgb = byte1_rgb;
  400.             screen.pixelbytes = 1;
  401.             break;
  402.         case 16:
  403.             screen.rgb2scr = rgb_2byte;
  404.             screen.scr2rgb = byte2_rgb;
  405.             screen.pixelbytes = 2;
  406.             break;
  407.         case 24:
  408.             screen.rgb2scr = rgb_3byte;
  409.             screen.scr2rgb = byte3_rgb;
  410.             screen.pixelbytes = 3;
  411.             break;
  412.         case 32:
  413.             screen.rgb2scr = rgb_4byte;
  414.             screen.scr2rgb = byte4_rgb;
  415.             screen.pixelbytes = 4;
  416.             break;
  417.     }
  418.  
  419.        
  420.     screen.fbaddress = (unsigned char *) addr;
  421.     screen.xres = xres;
  422.     screen.yres = yres;
  423.     screen.scanline = scan;
  424.    
  425.     /* Create first viewport */
  426.     viewport_create(0,0,xres,yres);
  427. }
  428.  
  429. /** Hide cursor if it is shown */
  430. static void cursor_hide(int vp)
  431. {
  432.     viewport_t *vport = &viewports[vp];
  433.  
  434.     if (vport->cursor_active && vport->cursor_shown) {
  435.         invert_char(vp, vport->cur_row, vport->cur_col);
  436.         vport->cursor_shown = 0;
  437.     }
  438. }
  439.  
  440. /** Show cursor if cursor showing is enabled */
  441. static void cursor_print(int vp)
  442. {
  443.     viewport_t *vport = &viewports[vp];
  444.  
  445.     /* Do not check for cursor_shown */
  446.     if (vport->cursor_active) {
  447.         invert_char(vp, vport->cur_row, vport->cur_col);
  448.         vport->cursor_shown = 1;
  449.     }
  450. }
  451.  
  452. /** Invert cursor, if it is enabled */
  453. static void cursor_blink(int vp)
  454. {
  455.     viewport_t *vport = &viewports[vp];
  456.  
  457.     if (vport->cursor_shown)
  458.         cursor_hide(vp);
  459.     else
  460.         cursor_print(vp);
  461. }
  462.  
  463. /** Draw character at given position relative to viewport
  464.  *
  465.  * @param vp Viewport identification
  466.  * @param c Character to print
  467.  * @param row Screen position relative to viewport
  468.  * @param col Screen position relative to viewport
  469.  * @param transparent If false, print background color with character
  470.  */
  471. static void draw_char(int vp, char c, unsigned int row, unsigned int col, style_t style, int transparent)
  472. {
  473.     viewport_t *vport = &viewports[vp];
  474.  
  475.     /* Optimize - do not hide cursor if we are going to overwrite it */
  476.     if (vport->cursor_active && vport->cursor_shown &&
  477.         (vport->cur_col != col || vport->cur_row != row))
  478.         invert_char(vp, vport->cur_row, vport->cur_col);
  479.    
  480.     draw_glyph(vp, c, col * COL_WIDTH, row * FONT_SCANLINES, style, transparent);
  481.  
  482.     vport->cur_col = col;
  483.     vport->cur_row = row;
  484.  
  485.     vport->cur_col++;
  486.     if (vport->cur_col>= vport->cols) {
  487.         vport->cur_col = 0;
  488.         vport->cur_row++;
  489.         if (vport->cur_row >= vport->rows)
  490.             vport->cur_row--;
  491.     }
  492.     cursor_print(vp);
  493. }
  494.  
  495. /** Draw text data to viewport
  496.  *
  497.  * @param vp Viewport id
  498.  * @param data Text data fitting exactly into viewport
  499.  */
  500. static void draw_text_data(int vp, keyfield_t *data)
  501. {
  502.     viewport_t *vport = &viewports[vp];
  503.     int i;
  504.     char c;
  505.     int col,row;
  506.  
  507.     clear_port(vp);
  508.     for (i=0; i < vport->cols * vport->rows; i++) {
  509.         if (data[i].character == ' ' && style_same(data[i].style,vport->style))
  510.             continue;
  511.         col = i % vport->cols;
  512.         row = i / vport->cols;
  513.         draw_glyph(vp, data[i].character, col * COL_WIDTH, row * FONT_SCANLINES,
  514.                data[i].style, style_same(data[i].style,vport->style));
  515.     }
  516.     cursor_print(vp);
  517. }
  518.  
  519.  
  520. /** Return first free pixmap */
  521. static int find_free_pixmap(void)
  522. {
  523.     int i;
  524.    
  525.     for (i=0;i < MAX_PIXMAPS;i++)
  526.         if (!pixmaps[i].data)
  527.             return i;
  528.     return -1;
  529. }
  530.  
  531. static void putpixel_pixmap(int pm, unsigned int x, unsigned int y, int color)
  532. {
  533.     pixmap_t *pmap = &pixmaps[pm];
  534.     int pos = (y * pmap->width + x) * screen.pixelbytes;
  535.  
  536.     (*screen.rgb2scr)(&pmap->data[pos],color);
  537. }
  538.  
  539. /** Create a new pixmap and return appropriate ID */
  540. static int shm2pixmap(char *shm, size_t size)
  541. {
  542.     int pm;
  543.     pixmap_t *pmap;
  544.  
  545.     pm = find_free_pixmap();
  546.     if (pm == -1)
  547.         return ELIMIT;
  548.     pmap = &pixmaps[pm];
  549.    
  550.     if (ppm_get_data(shm, size, &pmap->width, &pmap->height))
  551.         return EINVAL;
  552.    
  553.     pmap->data = malloc(pmap->width * pmap->height * screen.pixelbytes);
  554.     if (!pmap->data)
  555.         return ENOMEM;
  556.  
  557.     ppm_draw(shm, size, 0, 0, pmap->width, pmap->height,
  558.          putpixel_pixmap, pm);
  559.  
  560.     return pm;
  561. }
  562.  
  563. /** Handle shared memory communication calls
  564.  *
  565.  * Protocol for drawing pixmaps:
  566.  * - FB_PREPARE_SHM(client shm identification)
  567.  * - IPC_M_SEND_AS_AREA
  568.  * - FB_DRAW_PPM(startx,starty)
  569.  * - FB_DROP_SHM
  570.  *
  571.  * Protocol for text drawing
  572.  * - IPC_M_SEND_AS_AREA
  573.  * - FB_DRAW_TEXT_DATA
  574.  *
  575.  * @param callid Callid of the current call
  576.  * @param call Current call data
  577.  * @param vp Active viewport
  578.  * @return 0 if the call was not handled byt this function, 1 otherwise
  579.  *
  580.  * note: this function is not threads safe, you would have
  581.  * to redefine static variables with __thread
  582.  */
  583. static int shm_handle(ipc_callid_t callid, ipc_call_t *call, int vp)
  584. {
  585.     static keyfield_t *interbuffer = NULL;
  586.     static size_t intersize = 0;
  587.  
  588.     static char *shm = NULL;
  589.     static ipcarg_t shm_id = 0;
  590.     static size_t shm_size;
  591.  
  592.     int handled = 1;
  593.     int retval = 0;
  594.     viewport_t *vport = &viewports[vp];
  595.     unsigned int x,y;
  596.  
  597.     switch (IPC_GET_METHOD(*call)) {
  598.     case IPC_M_AS_AREA_SEND:
  599.         /* We accept one area for data interchange */
  600.         if (IPC_GET_ARG1(*call) == shm_id) {
  601.             void *dest = as_get_mappable_page(IPC_GET_ARG2(*call));
  602.             shm_size = IPC_GET_ARG2(*call);
  603.             if (!ipc_answer_fast(callid, 0, (sysarg_t)dest, 0))
  604.                 shm = dest;
  605.             else
  606.                 shm_id = 0;
  607.             if (shm[0] != 'P')
  608.                 while (1)
  609.                     ;
  610.             return 1;
  611.         } else {
  612.             intersize = IPC_GET_ARG2(*call);
  613.             receive_comm_area(callid,call,(void **)&interbuffer);
  614.         }
  615.         return 1;
  616.     case FB_PREPARE_SHM:
  617.         if (shm_id)
  618.             retval = EBUSY;
  619.         else
  620.             shm_id = IPC_GET_ARG1(*call);
  621.         break;
  622.        
  623.     case FB_DROP_SHM:
  624.         if (shm) {
  625.             as_area_destroy(shm);
  626.             shm = NULL;
  627.         }
  628.         shm_id = 0;
  629.         break;
  630.  
  631.     case FB_SHM2PIXMAP:
  632.         if (!shm) {
  633.             retval = EINVAL;
  634.             break;
  635.         }
  636.         retval = shm2pixmap(shm, shm_size);
  637.         break;
  638.     case FB_DRAW_PPM:
  639.         if (!shm) {
  640.             retval = EINVAL;
  641.             break;
  642.         }
  643.         x = IPC_GET_ARG1(*call);
  644.         y = IPC_GET_ARG2(*call);
  645.         if (x > vport->width || y > vport->height) {
  646.             retval = EINVAL;
  647.             break;
  648.         }
  649.        
  650.         ppm_draw(shm, shm_size, IPC_GET_ARG1(*call), IPC_GET_ARG2(*call),
  651.              vport->width - x, vport->height - y, putpixel, vp);
  652.         break;
  653.     case FB_DRAW_TEXT_DATA:
  654.         if (!interbuffer) {
  655.             retval = EINVAL;
  656.             break;
  657.         }
  658.         if (intersize < vport->cols*vport->rows*sizeof(*interbuffer)) {
  659.             retval = EINVAL;
  660.             break;
  661.         }
  662.         draw_text_data(vp, interbuffer);
  663.         break;
  664.     default:
  665.         handled = 0;
  666.     }
  667.    
  668.     if (handled)
  669.         ipc_answer_fast(callid, retval, 0, 0);
  670.     return handled;
  671. }
  672.  
  673. /** Save viewport to pixmap */
  674. static int save_vp_to_pixmap(int vp)
  675. {
  676.     int pm;
  677.     pixmap_t *pmap;
  678.     viewport_t *vport = &viewports[vp];
  679.     int x,y;
  680.     int rowsize;
  681.     int tmp;
  682.  
  683.     pm = find_free_pixmap();
  684.     if (pm == -1)
  685.         return ELIMIT;
  686.    
  687.     pmap = &pixmaps[pm];
  688.     pmap->data = malloc(screen.pixelbytes * vport->width * vport->height);
  689.     if (!pmap->data)
  690.         return ENOMEM;
  691.  
  692.     pmap->width = vport->width;
  693.     pmap->height = vport->height;
  694.    
  695.     rowsize = vport->width * screen.pixelbytes;
  696.     for (y=0;y < vport->height; y++) {
  697.         tmp = (vport->y + y) * screen.scanline + vport->x * screen.pixelbytes;
  698.         memcpy(pmap->data + rowsize*y, screen.fbaddress + tmp, rowsize);
  699.     }
  700.     return pm;
  701. }
  702.  
  703. /** Draw pixmap on screen
  704.  *
  705.  * @param vp Viewport to draw on
  706.  * @param pm Pixmap identifier
  707.  */
  708. static int draw_pixmap(int vp, int pm)
  709. {
  710.     pixmap_t *pmap = &pixmaps[pm];
  711.     viewport_t *vport = &viewports[vp];
  712.     int x,y;
  713.     int tmp, srcrowsize;
  714.     int realwidth, realheight, realrowsize;
  715.  
  716.     if (!pmap->data)
  717.         return EINVAL;
  718.  
  719.     realwidth = pmap->width <= vport->width ? pmap->width : vport->width;
  720.     realheight = pmap->height <= vport->height ? pmap->height : vport->height;
  721.  
  722.     srcrowsize = vport->width * screen.pixelbytes;
  723.     realrowsize = realwidth * screen.pixelbytes;
  724.  
  725.     for (y=0; y < realheight; y++) {
  726.         tmp = (vport->y + y) * screen.scanline + vport->x * screen.pixelbytes;
  727.         memcpy(screen.fbaddress + tmp, pmap->data + y * srcrowsize, realrowsize);
  728.     }
  729.     return 0;
  730. }
  731.  
  732. /** Tick animation one step forward */
  733. static void anims_tick(void)
  734. {
  735.     int i;
  736.     static int counts = 0;
  737.    
  738.     /* Limit redrawing */
  739.     counts = (counts+1) % 8;
  740.     if (counts)
  741.         return;
  742.  
  743.     for (i=0; i < MAX_ANIMATIONS; i++) {
  744.         if (!animations[i].animlen || !animations[i].initialized || !animations[i].enabled)
  745.             continue;
  746.         draw_pixmap(animations[i].vp, animations[i].pixmaps[animations[i].pos]);
  747.         animations[i].pos = (animations[i].pos+1) % animations[i].animlen;
  748.     }
  749. }
  750.  
  751. static int anim_handle(ipc_callid_t callid, ipc_call_t *call, int vp)
  752. {
  753.     int handled = 1;
  754.     int retval = 0;
  755.     int i,nvp;
  756.     int newval;
  757.  
  758.     switch (IPC_GET_METHOD(*call)) {
  759.     case FB_ANIM_CREATE:
  760.         nvp = IPC_GET_ARG1(*call);
  761.         if (nvp == -1)
  762.             nvp = vp;
  763.         if (nvp >= MAX_VIEWPORTS || nvp < 0 || !viewports[nvp].initialized) {
  764.             retval = EINVAL;
  765.             break;
  766.         }
  767.         for (i=0; i < MAX_ANIMATIONS; i++) {
  768.             if (! animations[i].initialized)
  769.                 break;
  770.         }
  771.         if (i == MAX_ANIMATIONS) {
  772.             retval = ELIMIT;
  773.             break;
  774.         }
  775.         animations[i].initialized = 1;
  776.         animations[i].animlen = 0;
  777.         animations[i].pos = 0;
  778.         animations[i].enabled = 0;
  779.         animations[i].vp = nvp;
  780.         retval = i;
  781.         break;
  782.     case FB_ANIM_DROP:
  783.         i = IPC_GET_ARG1(*call);
  784.         if (nvp >= MAX_ANIMATIONS || i < 0) {
  785.             retval = EINVAL;
  786.             break;
  787.         }
  788.         animations[i].initialized = 0;
  789.         break;
  790.     case FB_ANIM_ADDPIXMAP:
  791.         i = IPC_GET_ARG1(*call);
  792.         if (i >= MAX_ANIMATIONS || i < 0 || !animations[i].initialized) {
  793.             retval = EINVAL;
  794.             break;
  795.         }
  796.         if (animations[i].animlen == MAX_ANIM_LEN) {
  797.             retval = ELIMIT;
  798.             break;
  799.         }
  800.         newval = IPC_GET_ARG2(*call);
  801.         if (newval < 0 || newval > MAX_PIXMAPS || !pixmaps[newval].data) {
  802.             retval = EINVAL;
  803.             break;
  804.         }
  805.         animations[i].pixmaps[animations[i].animlen++] = newval;
  806.         break;
  807.     case FB_ANIM_CHGVP:
  808.         i = IPC_GET_ARG1(*call);
  809.         if (i >= MAX_ANIMATIONS || i < 0) {
  810.             retval = EINVAL;
  811.             break;
  812.         }
  813.         nvp = IPC_GET_ARG2(*call);
  814.         if (nvp == -1)
  815.             nvp = vp;
  816.         if (nvp >= MAX_VIEWPORTS || nvp < 0 || !viewports[nvp].initialized) {
  817.             retval = EINVAL;
  818.             break;
  819.         }
  820.         animations[i].vp = nvp;
  821.         break;
  822.     case FB_ANIM_START:
  823.     case FB_ANIM_STOP:
  824.         i = IPC_GET_ARG1(*call);
  825.         if (i >= MAX_ANIMATIONS || i < 0) {
  826.             retval = EINVAL;
  827.             break;
  828.         }
  829.         newval = (IPC_GET_METHOD(*call) == FB_ANIM_START);
  830.         if (newval ^ animations[i].enabled) {
  831.             animations[i].enabled = newval;
  832.             anims_enabled += newval ? 1 : -1;
  833.         }
  834.         break;
  835.     default:
  836.         handled = 0;
  837.     }
  838.     if (handled)
  839.         ipc_answer_fast(callid, retval, 0, 0);
  840.     return handled;
  841. }
  842.  
  843. /** Handler for messages concerning pixmap handling */
  844. static int pixmap_handle(ipc_callid_t callid, ipc_call_t *call, int vp)
  845. {
  846.     int handled = 1;
  847.     int retval = 0;
  848.     int i,nvp;
  849.  
  850.     switch (IPC_GET_METHOD(*call)) {
  851.     case FB_VP_DRAW_PIXMAP:
  852.         nvp = IPC_GET_ARG1(*call);
  853.         if (nvp == -1)
  854.             nvp = vp;
  855.         if (nvp < 0 || nvp >= MAX_VIEWPORTS || !viewports[nvp].initialized) {
  856.             retval = EINVAL;
  857.             break;
  858.         }
  859.         i = IPC_GET_ARG2(*call);
  860.         retval = draw_pixmap(nvp, i);
  861.         break;
  862.     case FB_VP2PIXMAP:
  863.         nvp = IPC_GET_ARG1(*call);
  864.         if (nvp == -1)
  865.             nvp = vp;
  866.         if (nvp < 0 || nvp >= MAX_VIEWPORTS || !viewports[nvp].initialized)
  867.             retval = EINVAL;
  868.         else
  869.             retval = save_vp_to_pixmap(nvp);
  870.         break;
  871.     case FB_DROP_PIXMAP:
  872.         i = IPC_GET_ARG1(*call);
  873.         if (i >= MAX_PIXMAPS) {
  874.             retval = EINVAL;
  875.             break;
  876.         }
  877.         if (pixmaps[i].data) {
  878.             free(pixmaps[i].data);
  879.             pixmaps[i].data = NULL;
  880.         }
  881.         break;
  882.     default:
  883.         handled = 0;
  884.     }
  885.  
  886.     if (handled)
  887.         ipc_answer_fast(callid, retval, 0, 0);
  888.     return handled;
  889.    
  890. }
  891.  
  892. /** Function for handling connections to FB
  893.  *
  894.  */
  895. static void fb_client_connection(ipc_callid_t iid, ipc_call_t *icall)
  896. {
  897.     ipc_callid_t callid;
  898.     ipc_call_t call;
  899.     int retval;
  900.     int i;
  901.     unsigned int row,col;
  902.     char c;
  903.  
  904.     int vp = 0;
  905.     viewport_t *vport = &viewports[0];
  906.  
  907.     if (client_connected) {
  908.         ipc_answer_fast(iid, ELIMIT, 0,0);
  909.         return;
  910.     }
  911.     client_connected = 1;
  912.     ipc_answer_fast(iid, 0, 0, 0); /* Accept connection */
  913.  
  914.     while (1) {
  915.         if (vport->cursor_active || anims_enabled)
  916.             callid = async_get_call_timeout(&call,250000);
  917.         else
  918.             callid = async_get_call(&call);
  919.  
  920.         if (!callid) {
  921.             cursor_blink(vp);
  922.             anims_tick();
  923.             continue;
  924.         }
  925.         if (shm_handle(callid, &call, vp))
  926.             continue;
  927.         if (pixmap_handle(callid, &call, vp))
  928.             continue;
  929.         if (anim_handle(callid, &call, vp))
  930.             continue;
  931.  
  932.         switch (IPC_GET_METHOD(call)) {
  933.         case IPC_M_PHONE_HUNGUP:
  934.             client_connected = 0;
  935.             /* cleanup other viewports */
  936.             for (i=1; i < MAX_VIEWPORTS; i++)
  937.                 vport->initialized = 0;
  938.             return; /* Exit thread */
  939.  
  940.         case FB_PUTCHAR:
  941.         case FB_TRANS_PUTCHAR:
  942.             c = IPC_GET_ARG1(call);
  943.             row = IPC_GET_ARG2(call);
  944.             col = IPC_GET_ARG3(call);
  945.             if (row >= vport->rows || col >= vport->cols) {
  946.                 retval = EINVAL;
  947.                 break;
  948.             }
  949.             ipc_answer_fast(callid,0,0,0);
  950.  
  951.             draw_char(vp, c, row, col, vport->style, IPC_GET_METHOD(call) == FB_TRANS_PUTCHAR);
  952.             continue; /* msg already answered */
  953.         case FB_CLEAR:
  954.             clear_port(vp);
  955.             cursor_print(vp);
  956.             retval = 0;
  957.             break;
  958.         case FB_CURSOR_GOTO:
  959.             row = IPC_GET_ARG1(call);
  960.             col = IPC_GET_ARG2(call);
  961.             if (row >= vport->rows || col >= vport->cols) {
  962.                 retval = EINVAL;
  963.                 break;
  964.             }
  965.             retval = 0;
  966.             cursor_hide(vp);
  967.             vport->cur_col = col;
  968.             vport->cur_row = row;
  969.             cursor_print(vp);
  970.             break;
  971.         case FB_CURSOR_VISIBILITY:
  972.             cursor_hide(vp);
  973.             vport->cursor_active = IPC_GET_ARG1(call);
  974.             cursor_print(vp);
  975.             retval = 0;
  976.             break;
  977.         case FB_GET_CSIZE:
  978.             ipc_answer_fast(callid, 0, vport->rows, vport->cols);
  979.             continue;
  980.         case FB_SCROLL:
  981.             i = IPC_GET_ARG1(call);
  982.             if (i > vport->rows || i < (- (int)vport->rows)) {
  983.                 retval = EINVAL;
  984.                 break;
  985.             }
  986.             cursor_hide(vp);
  987.             scroll_port(vp, i);
  988.             cursor_print(vp);
  989.             retval = 0;
  990.             break;
  991.         case FB_VIEWPORT_SWITCH:
  992.             i = IPC_GET_ARG1(call);
  993.             if (i < 0 || i >= MAX_VIEWPORTS) {
  994.                 retval = EINVAL;
  995.                 break;
  996.             }
  997.             if (! viewports[i].initialized ) {
  998.                 retval = EADDRNOTAVAIL;
  999.                 break;
  1000.             }
  1001.             cursor_hide(vp);
  1002.             vp = i;
  1003.             vport = &viewports[vp];
  1004.             cursor_print(vp);
  1005.             retval = 0;
  1006.             break;
  1007.         case FB_VIEWPORT_CREATE:
  1008.             retval = viewport_create(IPC_GET_ARG1(call) >> 16,
  1009.                          IPC_GET_ARG1(call) & 0xffff,
  1010.                          IPC_GET_ARG2(call) >> 16,
  1011.                          IPC_GET_ARG2(call) & 0xffff);
  1012.             break;
  1013.         case FB_VIEWPORT_DELETE:
  1014.             i = IPC_GET_ARG1(call);
  1015.             if (i < 0 || i >= MAX_VIEWPORTS) {
  1016.                 retval = EINVAL;
  1017.                 break;
  1018.             }
  1019.             if (! viewports[i].initialized ) {
  1020.                 retval = EADDRNOTAVAIL;
  1021.                 break;
  1022.             }
  1023.             viewports[i].initialized = 0;
  1024.             retval = 0;
  1025.             break;
  1026.         case FB_SET_STYLE:
  1027.             vport->style.fg_color = IPC_GET_ARG1(call);
  1028.             vport->style.bg_color = IPC_GET_ARG2(call);
  1029.             retval = 0;
  1030.             break;
  1031.         case FB_GET_RESOLUTION:
  1032.             ipc_answer_fast(callid, 0, screen.xres,screen.yres);
  1033.             continue;
  1034.         default:
  1035.             retval = ENOENT;
  1036.         }
  1037.         ipc_answer_fast(callid,retval,0,0);
  1038.     }
  1039. }
  1040.  
  1041. /** Initialization of framebuffer */
  1042. int fb_init(void)
  1043. {
  1044.     void *fb_ph_addr;
  1045.     unsigned int fb_width;
  1046.     unsigned int fb_height;
  1047.     unsigned int fb_bpp;
  1048.     unsigned int fb_scanline;
  1049.     void *fb_addr;
  1050.     size_t asz;
  1051.  
  1052.     async_set_client_connection(fb_client_connection);
  1053.  
  1054.     fb_ph_addr=(void *)sysinfo_value("fb.address.physical");
  1055.     fb_width=sysinfo_value("fb.width");
  1056.     fb_height=sysinfo_value("fb.height");
  1057.     fb_bpp=sysinfo_value("fb.bpp");
  1058.     fb_scanline=sysinfo_value("fb.scanline");
  1059.  
  1060.     asz = fb_scanline*fb_height;
  1061.     fb_addr = as_get_mappable_page(asz);
  1062.    
  1063.     map_physmem(fb_ph_addr, fb_addr, ALIGN_UP(asz,PAGE_SIZE) >>PAGE_WIDTH,
  1064.             AS_AREA_READ | AS_AREA_WRITE | AS_AREA_CACHEABLE);
  1065.    
  1066.     screen_init(fb_addr, fb_width, fb_height, fb_bpp, fb_scanline);
  1067.  
  1068.     return 0;
  1069. }
  1070.  
  1071.  
  1072. /**
  1073.  * @}
  1074.  */
  1075.