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  1. /*
  2.  * Copyright (C) 2006 Jakub Vana
  3.  * All rights reserved.
  4.  *
  5.  * Redistribution and use in source and binary forms, with or without
  6.  * modification, are permitted provided that the following conditions
  7.  * are met:
  8.  *
  9.  * - Redistributions of source code must retain the above copyright
  10.  *   notice, this list of conditions and the following disclaimer.
  11.  * - Redistributions in binary form must reproduce the above copyright
  12.  *   notice, this list of conditions and the following disclaimer in the
  13.  *   documentation and/or other materials provided with the distribution.
  14.  * - The name of the author may not be used to endorse or promote products
  15.  *   derived from this software without specific prior written permission.
  16.  *
  17.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27.  */
  28.  
  29. #include <stdio.h>
  30. #include <ddi.h>
  31. #include <task.h>
  32. #include <stdlib.h>
  33. #include <ddi.h>
  34. #include <sysinfo.h>
  35. #include <align.h>
  36. #include <as.h>
  37. #include <ipc/fb.h>
  38.  
  39.  
  40. #include <ipc/ipc.h>
  41. #include <ipc/services.h>
  42. #include <unistd.h>
  43. #include <stdlib.h>
  44. #include <ipc/ns.h>
  45.  
  46. #include <kernel/errno.h>
  47.  
  48.  
  49. #include "fb.h"
  50.  
  51.  
  52.  
  53. #define pl /*printf("FB:L:%d\n",(int)__LINE__);*/
  54.  
  55. #define EFB (-1)
  56.  
  57. #define DEFAULT_BGCOLOR     0x000080
  58. #define DEFAULT_FGCOLOR     0xffff00
  59. #define DEFAULT_LOGOCOLOR   0x0000ff
  60.  
  61. #define MAIN_BGCOLOR        0x404000
  62. #define MAIN_FGCOLOR        0x000000
  63. #define MAIN_LOGOCOLOR  0x404000
  64.  
  65. #define SPACING (2)
  66.  
  67. #define H_NO_VFBS 3
  68. #define V_NO_VFBS 3
  69.  
  70.  
  71. static void fb_putchar(int item,char ch);
  72. int create_window(int item,unsigned int x, unsigned int y,unsigned int x_size, unsigned int y_size,
  73.     unsigned int BGCOLOR,unsigned int FGCOLOR,unsigned int LOGOCOLOR);
  74. void fb_init(int item,__address addr, unsigned int x, unsigned int y, unsigned int bpp, unsigned int scan,
  75.     unsigned int BGCOLOR,unsigned int FGCOLOR,unsigned int LOGOCOLOR);
  76.  
  77.  
  78. unsigned int mod_col(unsigned int col,int mod);
  79.  
  80.  
  81.  
  82.  
  83.  
  84. int main(int argc, char *argv[])
  85. {
  86.    
  87.     __address fb_ph_addr;
  88.     unsigned int fb_width;
  89.     unsigned int fb_height;
  90.     unsigned int fb_bpp;
  91.     unsigned int fb_scanline;
  92.     __address fb_addr;
  93.     int a=0;
  94.  
  95.  
  96.     if(!sysinfo_value("fb")) return -1;
  97.    
  98.     fb_ph_addr=sysinfo_value("fb.address.physical");
  99.     fb_width=sysinfo_value("fb.width");
  100.     fb_height=sysinfo_value("fb.height");
  101.     fb_bpp=sysinfo_value("fb.bpp");
  102.     fb_scanline=sysinfo_value("fb.scanline");
  103.  
  104.     fb_addr=ALIGN_UP(((__address)set_maxheapsize(USER_ADDRESS_SPACE_SIZE_ARCH>>1)),PAGE_SIZE);
  105.  
  106.  
  107.  
  108.     map_physmem(task_get_id(),(void *)((__address)fb_ph_addr),(void *)fb_addr,
  109.         (fb_scanline*fb_height+PAGE_SIZE-1)>>PAGE_WIDTH,1);
  110.    
  111.     fb_init(0,fb_addr, fb_width, fb_height, fb_bpp, fb_scanline,
  112.         MAIN_BGCOLOR,MAIN_FGCOLOR,MAIN_LOGOCOLOR);
  113.  
  114.     fb_putchar(0,'\n');
  115.     fb_putchar(0,' ');
  116.  
  117.  
  118.     {
  119.         int i,j;
  120.  
  121.         for(i=0;i<H_NO_VFBS;i++)
  122.             for(j=0;j<V_NO_VFBS;j++)
  123.             {
  124.    
  125.                 int w=create_window(0,(fb_width/H_NO_VFBS)*i+SPACING,
  126.                     (fb_height/V_NO_VFBS)*j+SPACING,(fb_width/H_NO_VFBS)-2*SPACING ,
  127.                         (fb_height/V_NO_VFBS)-2*SPACING,mod_col(DEFAULT_BGCOLOR,/*i+j*H_NO_VFBS*/0),
  128.                             mod_col(DEFAULT_FGCOLOR,/*i+j*H_NO_VFBS*/0),
  129.                                 mod_col(DEFAULT_LOGOCOLOR,/*i+j*H_NO_VFBS)*/0));
  130.  
  131.                 if(w==EFB) return -1;
  132.  
  133.                 {
  134.                     char text[]="Hello, World from\nHelenOS Framebuffer driver\non Virtual Framebuffer\nVFB ";
  135.                     int i;
  136.                     for(i=0;text[i];i++) fb_putchar(w,text[i]);
  137.                     fb_putchar(w,w+'0');
  138.                     fb_putchar(w,'\n');
  139.                 }
  140.             }
  141.     }
  142.  
  143.  
  144.     ipc_call_t call;
  145.     ipc_callid_t callid;
  146.     char connected = 0;
  147.     int res;
  148.     int c;
  149.     ipcarg_t phonead;
  150.    
  151.     ipcarg_t retval, arg1, arg2;
  152.  
  153.  
  154.  
  155.     if ((res = ipc_connect_to_me(PHONE_NS, SERVICE_VIDEO, 0, &phonead)) != 0)
  156.     {
  157.         return -1;
  158.     };
  159.  
  160.        
  161.     while (1) {
  162.         static int vfb_no=1;
  163.  
  164.         callid = ipc_wait_for_call(&call);
  165.     //  printf("%s:Call phone=%lX..", NAME, call.in_phone_hash);
  166.         switch (IPC_GET_METHOD(call)&((1<<METHOD_WIDTH)-1)) {
  167.             case IPC_M_PHONE_HUNGUP:
  168. //              fb_putchar(4,((a++)&15)+'A');
  169.                
  170.                 retval = 0;
  171.                 break;
  172.             case IPC_M_CONNECT_ME_TO:
  173.                     retval = 0;
  174. //              fb_putchar(1,((a++)&15)+'A');
  175.                 break;
  176.             case FB_GET_VFB:
  177.                 retval = 0;
  178.                 arg1 = vfb_no++;   
  179. //              fb_putchar(2,((a++)&15)+'A');
  180.                
  181.                 break;
  182.  
  183.             case FB_PUTCHAR:
  184.                 retval = 0;
  185.                 fb_putchar(IPC_GET_ARG1(call),IPC_GET_ARG2(call));
  186. //              fb_putchar(2,((a++)&15)+'A');
  187.                 break;
  188.  
  189.             default:
  190.                 retval = ENOENT;
  191. //              fb_putchar(3,((a++)&15)+'A');
  192.                 break;
  193.         }
  194.  
  195.         if (! (callid & IPC_CALLID_NOTIFICATION)) {
  196.             ipc_answer_fast(callid, retval, arg1, arg2);
  197.         }
  198.     }
  199.  
  200.     return 0;
  201. }
  202. /*
  203.  * Copyright (C) 2006 Ondrej Palkovsky
  204.  * All rights reserved.
  205.  *
  206.  * Redistribution and use in source and binary forms, with or without
  207.  * modification, are permitted provided that the following conditions
  208.  * are met:
  209.  *
  210.  * - Redistributions of source code must retain the above copyright
  211.  *   notice, this list of conditions and the following disclaimer.
  212.  * - Redistributions in binary form must reproduce the above copyright
  213.  *   notice, this list of conditions and the following disclaimer in the
  214.  *   documentation and/or other materials provided with the distribution.
  215.  * - The name of the author may not be used to endorse or promote products
  216.  *   derived from this software without specific prior written permission.
  217.  *
  218.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  219.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  220.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  221.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  222.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  223.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  224.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  225.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  226.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  227.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  228.  */
  229.  
  230. #include "font-8x16.h"
  231. #include <string.h>
  232.  
  233. #include "helenos.xbm"
  234.  
  235.  
  236.  
  237.  
  238.  
  239.  
  240. #define GRAPHICS_ITEMS 1024
  241.  
  242.  
  243. /***************************************************************/
  244. /* Pixel specific fuctions */
  245.  
  246. typedef void (*putpixel_fn_t)(int item,unsigned int x, unsigned int y, int color);
  247. typedef int (*getpixel_fn_t)(int item,unsigned int x, unsigned int y);
  248.  
  249. typedef struct framebuffer_descriptor
  250. {
  251.     __u8 *fbaddress ;
  252.  
  253.     unsigned int xres ;
  254.     unsigned int yres ;
  255.     unsigned int scanline ;
  256.     unsigned int pixelbytes ;
  257.  
  258.     unsigned int position ;
  259.     unsigned int columns ;
  260.     unsigned int rows ;
  261.    
  262.     unsigned int BGCOLOR;
  263.     unsigned int FGCOLOR;
  264.     unsigned int LOGOCOLOR;
  265.    
  266.     putpixel_fn_t putpixel;
  267.     getpixel_fn_t getpixel;
  268.    
  269. }framebuffer_descriptor_t;
  270.  
  271. void * graphics_items[GRAPHICS_ITEMS+1]={NULL};
  272.  
  273. #define FB(__a__,__b__) (((framebuffer_descriptor_t*)(graphics_items[__a__]))->__b__)
  274.  
  275. #define COL_WIDTH   8
  276. #define ROW_BYTES   (FB(item,scanline) * FONT_SCANLINES)
  277. #define RED(x, bits)    ((x >> (16 + 8 - bits)) & ((1 << bits) - 1))
  278. #define GREEN(x, bits)  ((x >> (8 + 8 - bits)) & ((1 << bits) - 1))
  279. #define BLUE(x, bits)   ((x >> (8 - bits)) & ((1 << bits) - 1))
  280.  
  281. #define POINTPOS(x, y)  (y * FB(item,scanline) + x * FB(item,pixelbytes))
  282.  
  283.  
  284.  
  285.  
  286. /** Put pixel - 24-bit depth, 1 free byte */
  287. static void putpixel_4byte(int item,unsigned int x, unsigned int y, int color)
  288. {
  289.     *((__u32 *)(FB(item,fbaddress) + POINTPOS(x, y))) = color;
  290. }
  291.  
  292. /** Return pixel color - 24-bit depth, 1 free byte */
  293. static int getpixel_4byte(int item,unsigned int x, unsigned int y)
  294. {
  295.     return *((__u32 *)(FB(item,fbaddress) + POINTPOS(x, y))) & 0xffffff;
  296. }
  297.  
  298. /** Put pixel - 24-bit depth */
  299. static void putpixel_3byte(int item,unsigned int x, unsigned int y, int color)
  300. {
  301.     unsigned int startbyte = POINTPOS(x, y);
  302.  
  303. #if (defined(BIG_ENDIAN) || defined(FB_BIG_ENDIAN))
  304.     FB(item,fbaddress)[startbyte] = RED(color, 8);
  305.     FB(item,fbaddress)[startbyte + 1] = GREEN(color, 8);
  306.     FB(item,fbaddress)[startbyte + 2] = BLUE(color, 8);
  307. #else
  308.     FB(item,fbaddress)[startbyte + 2] = RED(color, 8);
  309.     FB(item,fbaddress)[startbyte + 1] = GREEN(color, 8);
  310.     FB(item,fbaddress)[startbyte + 0] = BLUE(color, 8);
  311. #endif
  312.                                                                                                
  313.  
  314. }
  315.  
  316. /** Return pixel color - 24-bit depth */
  317. static int getpixel_3byte(int item,unsigned int x, unsigned int y)
  318. {
  319.     unsigned int startbyte = POINTPOS(x, y);
  320.  
  321.  
  322.  
  323. #if (defined(BIG_ENDIAN) || defined(FB_BIG_ENDIAN))
  324.     return FB(item,fbaddress)[startbyte] << 16 | FB(item,fbaddress)[startbyte + 1] << 8 | FB(item,fbaddress)[startbyte + 2];
  325. #else
  326.     return FB(item,fbaddress)[startbyte + 2] << 16 | FB(item,fbaddress)[startbyte + 1] << 8 | FB(item,fbaddress)[startbyte + 0];
  327. #endif
  328.                                
  329.  
  330. }
  331.  
  332. /** Put pixel - 16-bit depth (5:6:5) */
  333. static void putpixel_2byte(int item,unsigned int x, unsigned int y, int color)
  334. {
  335.     /* 5-bit, 6-bits, 5-bits */
  336.     *((__u16 *)(FB(item,fbaddress) + POINTPOS(x, y))) = RED(color, 5) << 11 | GREEN(color, 6) << 5 | BLUE(color, 5);
  337. }
  338.  
  339. /** Return pixel color - 16-bit depth (5:6:5) */
  340. static int getpixel_2byte(int item,unsigned int x, unsigned int y)
  341. {
  342.     int color = *((__u16 *)(FB(item,fbaddress) + POINTPOS(x, y)));
  343.     return (((color >> 11) & 0x1f) << (16 + 3)) | (((color >> 5) & 0x3f) << (8 + 2)) | ((color & 0x1f) << 3);
  344. }
  345.  
  346. /** Put pixel - 8-bit depth (3:2:3) */
  347. static void putpixel_1byte(int item,unsigned int x, unsigned int y, int color)
  348. {
  349.     FB(item,fbaddress)[POINTPOS(x, y)] = RED(color, 3) << 5 | GREEN(color, 2) << 3 | BLUE(color, 3);
  350. }
  351.  
  352. /** Return pixel color - 8-bit depth (3:2:3) */
  353. static int getpixel_1byte(int item,unsigned int x, unsigned int y)
  354. {
  355.     int color = FB(item,fbaddress)[POINTPOS(x, y)];
  356.     return (((color >> 5) & 0x7) << (16 + 5)) | (((color >> 3) & 0x3) << (8 + 6)) | ((color & 0x7) << 5);
  357. }
  358.  
  359. /** Fill line with color BGCOLOR */
  360. static void clear_line(int item,unsigned int y)
  361. {
  362.     unsigned int x;
  363.     for (x = 0; x < FB(item,xres); x++)
  364.         FB(item,putpixel)(item,x, y, FB(item,BGCOLOR));
  365. }
  366.  
  367.  
  368. /** Fill screen with background color */
  369. static void clear_screen(int item)
  370. {
  371.     unsigned int y;
  372.     for (y = 0; y < FB(item,yres); y++)
  373.     {
  374.         clear_line(item,y); pl
  375.     }  
  376. }
  377.  
  378.  
  379. /** Scroll screen one row up */
  380. static void scroll_screen(int item)
  381. {
  382.     unsigned int i;
  383.     unsigned int j;
  384.  
  385.     for(j=0;j<FB(item,yres)-FONT_SCANLINES;j++)
  386.         memcpy((void *) FB(item,fbaddress)+j*FB(item,scanline),
  387.             (void *) &FB(item,fbaddress)[ROW_BYTES+j*FB(item,scanline)], FB(item,pixelbytes)*FB(item,xres));
  388.  
  389.     //memcpy((void *) FB(item,fbaddress), (void *) &FB(item,fbaddress)[ROW_BYTES], FB(item,scanline) * FB(item,yres) - ROW_BYTES);
  390.  
  391.     /* Clear last row */
  392.     for (i = 0; i < FONT_SCANLINES; i++)
  393.         clear_line(item,(FB(item,rows) - 1) * FONT_SCANLINES + i);
  394. }
  395.  
  396.  
  397. static void invert_pixel(int item,unsigned int x, unsigned int y)
  398. {
  399.     FB(item,putpixel)(item, x, y, ~FB(item,getpixel)(item, x, y));
  400. }
  401.  
  402.  
  403. /** Draw one line of glyph at a given position */
  404. static void draw_glyph_line(int item,unsigned int glline, unsigned int x, unsigned int y)
  405. {
  406.     unsigned int i;
  407.  
  408.     for (i = 0; i < 8; i++)
  409.         if (glline & (1 << (7 - i))) {
  410.             FB(item,putpixel)(item,x + i, y, FB(item,FGCOLOR));
  411.         } else
  412.             FB(item,putpixel)(item,x + i, y, FB(item,BGCOLOR));
  413. }
  414.  
  415. /***************************************************************/
  416. /* Character-console functions */
  417.  
  418. /** Draw character at given position */
  419. static void draw_glyph(int item,__u8 glyph, unsigned int col, unsigned int row)
  420. {
  421.     unsigned int y;
  422.  
  423.     for (y = 0; y < FONT_SCANLINES; y++)
  424.         draw_glyph_line(item ,fb_font[glyph * FONT_SCANLINES + y], col * COL_WIDTH, row * FONT_SCANLINES + y);
  425. }
  426.  
  427. /** Invert character at given position */
  428. static void invert_char(int item,unsigned int col, unsigned int row)
  429. {
  430.     unsigned int x;
  431.     unsigned int y;
  432.  
  433.     for (x = 0; x < COL_WIDTH; x++)
  434.         for (y = 0; y < FONT_SCANLINES; y++)
  435.             invert_pixel(item,col * COL_WIDTH + x, row * FONT_SCANLINES + y);
  436. }
  437.  
  438. /** Draw character at default position */
  439. static void draw_char(int item,char chr)
  440. {
  441.     draw_glyph(item ,chr, FB(item,position) % FB(item,columns), FB(item,position) / FB(item,columns));
  442. }
  443.  
  444. static void draw_logo(int item,unsigned int startx, unsigned int starty)
  445. {
  446.     unsigned int x;
  447.     unsigned int y;
  448.     unsigned int byte;
  449.     unsigned int rowbytes;
  450.  
  451.     rowbytes = (helenos_width - 1) / 8 + 1;
  452.  
  453.     for (y = 0; y < helenos_height; y++)
  454.         for (x = 0; x < helenos_width; x++) {
  455.             byte = helenos_bits[rowbytes * y + x / 8];
  456.             byte >>= x % 8;
  457.             if (byte & 1)
  458.                 FB(item,putpixel)(item,startx + x, starty + y, FB(item,LOGOCOLOR));
  459.         }
  460. }
  461.  
  462. /***************************************************************/
  463. /* Stdout specific functions */
  464.  
  465. static void invert_cursor(int item)
  466. {
  467.     invert_char(item,FB(item,position) % FB(item,columns), FB(item,position) / FB(item,columns));
  468. }
  469.  
  470. /** Print character to screen
  471.  *
  472.  *  Emulate basic terminal commands
  473.  */
  474. static void fb_putchar(int item,char ch)
  475. {
  476.    
  477.     switch (ch) {
  478.         case '\n':
  479.             invert_cursor(item);
  480.             FB(item,position) += FB(item,columns);
  481.             FB(item,position) -= FB(item,position) % FB(item,columns);
  482.             break;
  483.         case '\r':
  484.             invert_cursor(item);
  485.             FB(item,position) -= FB(item,position) % FB(item,columns);
  486.             break;
  487.         case '\b':
  488.             invert_cursor(item);
  489.             if (FB(item,position) % FB(item,columns))
  490.                 FB(item,position)--;
  491.             break;
  492.         case '\t':
  493.             invert_cursor(item);
  494.             do {
  495.                 draw_char(item,' ');
  496.                 FB(item,position)++;
  497.             } while (FB(item,position) % 8);
  498.             break;
  499.         default:
  500.             draw_char(item,ch);
  501.             FB(item,position)++;
  502.     }
  503.    
  504.     if (FB(item,position) >= FB(item,columns) * FB(item,rows)) {
  505.         FB(item,position) -= FB(item,columns);
  506.         scroll_screen(item);
  507.     }
  508.    
  509.     invert_cursor(item);
  510.    
  511. }
  512.  
  513.  
  514. /** Initialize framebuffer as a chardev output device
  515.  *
  516.  * @param addr Address of theframebuffer
  517.  * @param x    Screen width in pixels
  518.  * @param y    Screen height in pixels
  519.  * @param bpp  Bits per pixel (8, 16, 24, 32)
  520.  * @param scan Bytes per one scanline
  521.  *
  522.  */
  523. void fb_init(int item,__address addr, unsigned int x, unsigned int y, unsigned int bpp, unsigned int scan,
  524.     unsigned int BGCOLOR,unsigned int FGCOLOR,unsigned int LOGOCOLOR)
  525. {
  526.    
  527.     if( (graphics_items[item]=malloc(sizeof(framebuffer_descriptor_t))) ==NULL)
  528.     {
  529.         return;
  530.     }
  531.  
  532.     switch (bpp) {
  533.         case 8:
  534.             FB(item,putpixel) = putpixel_1byte;
  535.             FB(item,getpixel) = getpixel_1byte;
  536.             FB(item,pixelbytes) = 1;
  537.             break;
  538.         case 16:
  539.             FB(item,putpixel) = putpixel_2byte;
  540.             FB(item,getpixel) = getpixel_2byte;
  541.             FB(item,pixelbytes) = 2;
  542.             break;
  543.         case 24:
  544.             FB(item,putpixel) = putpixel_3byte;
  545.             FB(item,getpixel) = getpixel_3byte;
  546.             FB(item,pixelbytes) = 3;
  547.             break;
  548.         case 32:
  549.             FB(item,putpixel) = putpixel_4byte;
  550.             FB(item,getpixel) = getpixel_4byte;
  551.             FB(item,pixelbytes) = 4;
  552.             break;
  553.     }
  554.  
  555.        
  556.     FB(item,fbaddress) = (unsigned char *) addr; pl
  557.     FB(item,xres) = x; pl
  558.     FB(item,yres) = y; pl
  559.     FB(item,scanline) = scan; pl
  560.    
  561.    
  562.     FB(item,rows) = y / FONT_SCANLINES; pl
  563.     FB(item,columns) = x / COL_WIDTH; pl
  564.  
  565.     FB(item,BGCOLOR)=BGCOLOR;
  566.     FB(item,FGCOLOR)=FGCOLOR;
  567.     FB(item,LOGOCOLOR)=LOGOCOLOR;
  568.  
  569.  
  570.     clear_screen(item); pl
  571.     draw_logo(item,FB(item,xres) - helenos_width, 0); pl
  572.     invert_cursor(item); pl
  573.  
  574. }
  575.  
  576.  
  577. static int get_free_item()
  578. {
  579.     int item;
  580.     for(item=0;graphics_items[item]!=NULL;item++);
  581.     return (item==GRAPHICS_ITEMS)?EFB:item;
  582. }
  583.  
  584. unsigned int mod_col(unsigned int col,int mod)
  585. {
  586.     if(mod & 1) col^=0xff;
  587.     if(mod & 2) col^=0xff00;
  588.     if(mod & 4) col^=0xff0000;
  589.     return col;
  590. }
  591.  
  592.  
  593. int create_window(int item,unsigned int x, unsigned int y,unsigned int x_size, unsigned int y_size,
  594.     unsigned int BGCOLOR,unsigned int FGCOLOR,unsigned int LOGOCOLOR)
  595. {
  596.     int item_new;
  597.    
  598.     if(EFB==(item_new=get_free_item()))return EFB;
  599.    
  600.    
  601.     if( (graphics_items[item_new]=malloc(sizeof(framebuffer_descriptor_t))) ==NULL)
  602.     {
  603.         return EFB;
  604.     }
  605.    
  606.    
  607.    
  608.     FB(item_new,putpixel) = FB(item,putpixel);
  609.     FB(item_new,getpixel) = FB(item,getpixel);
  610.     FB(item_new,pixelbytes) = FB(item,pixelbytes);
  611.  
  612.     FB(item_new,fbaddress) = FB(item,fbaddress) + POINTPOS(x, y) ;
  613.     FB(item_new,xres) = x_size;
  614.     FB(item_new,yres) = y_size;
  615.     FB(item_new,scanline) =  FB(item,scanline);
  616.    
  617.  
  618.     FB(item_new,rows) = y_size / FONT_SCANLINES;
  619.     FB(item_new,columns) = x_size / COL_WIDTH;
  620.  
  621.     FB(item_new,BGCOLOR)=BGCOLOR;
  622.     FB(item_new,FGCOLOR)=FGCOLOR;
  623.     FB(item_new,LOGOCOLOR)=LOGOCOLOR;
  624.  
  625.  
  626.     clear_screen(item_new);
  627.     draw_logo(item_new,FB(item_new,xres) - helenos_width, 0);
  628.     invert_cursor(item_new);
  629.  
  630.     return item_new;
  631. }
  632.  
  633.  
  634.  
  635.