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  1. /*
  2.  * Copyright (C) 2006 Ondrej Palkovsky
  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 <genarch/fb/font-8x16.h>
  30. #include <genarch/fb/fb.h>
  31. #include <console/chardev.h>
  32. #include <console/console.h>
  33. #include <panic.h>
  34. #include <memstr.h>
  35.  
  36. #include "helenos.xbm"
  37.  
  38. SPINLOCK_INITIALIZE(fb_lock);
  39.  
  40. static __u8 *fbaddress = NULL;
  41.  
  42. static unsigned int xres = 0;
  43. static unsigned int yres = 0;
  44. static unsigned int scanline = 0;
  45. static unsigned int pixelbytes = 0;
  46.  
  47. static unsigned int position = 0;
  48. static unsigned int columns = 0;
  49. static unsigned int rows = 0;
  50.  
  51.  
  52. #define COL_WIDTH   8
  53. #define ROW_BYTES   (scanline * FONT_SCANLINES)
  54.  
  55. #define BGCOLOR     0x000080
  56. #define FGCOLOR     0xffff00
  57. #define LOGOCOLOR   0x2020b0
  58.  
  59. #define RED(x, bits)    ((x >> (16 + 8 - bits)) & ((1 << bits) - 1))
  60. #define GREEN(x, bits)  ((x >> (8 + 8 - bits)) & ((1 << bits) - 1))
  61. #define BLUE(x, bits)   ((x >> (8 - bits)) & ((1 << bits) - 1))
  62.  
  63. #define POINTPOS(x, y)  (y * scanline + x * pixelbytes)
  64.  
  65. /***************************************************************/
  66. /* Pixel specific fuctions */
  67.  
  68. static void (*putpixel)(unsigned int x, unsigned int y, int color);
  69. static int (*getpixel)(unsigned int x, unsigned int y);
  70.  
  71. /** Put pixel - 24-bit depth, 1 free byte */
  72. static void putpixel_4byte(unsigned int x, unsigned int y, int color)
  73. {
  74.     *((__u32 *)(fbaddress + POINTPOS(x, y))) = color;
  75. }
  76.  
  77. /** Return pixel color - 24-bit depth, 1 free byte */
  78. static int getpixel_4byte(unsigned int x, unsigned int y)
  79. {
  80.     return *((__u32 *)(fbaddress + POINTPOS(x, y))) & 0xffffff;
  81. }
  82.  
  83. /** Put pixel - 24-bit depth */
  84. static void putpixel_3byte(unsigned int x, unsigned int y, int color)
  85. {
  86.     unsigned int startbyte = POINTPOS(x, y);
  87.  
  88.     fbaddress[startbyte] = RED(color, 8);
  89.     fbaddress[startbyte + 1] = GREEN(color, 8);
  90.     fbaddress[startbyte + 2] = BLUE(color, 8);
  91. }
  92.  
  93. /** Return pixel color - 24-bit depth */
  94. static int getpixel_3byte(unsigned int x, unsigned int y)
  95. {
  96.     unsigned int startbyte = POINTPOS(x, y);
  97.  
  98.     return fbaddress[startbyte] << 16 | fbaddress[startbyte + 1] << 8 | fbaddress[startbyte + 2];
  99. }
  100.  
  101. /** Put pixel - 16-bit depth (5:6:6) */
  102. static void putpixel_2byte(unsigned int x, unsigned int y, int color)
  103. {
  104.     /* 5-bit, 5-bits, 5-bits */
  105.     *((__u16 *)(fbaddress + POINTPOS(x, y))) = RED(color, 5) << 11 | GREEN(color, 6) << 5 | BLUE(color, 5);
  106. }
  107.  
  108. /** Return pixel color - 16-bit depth (5:6:6) */
  109. static int getpixel_2byte(unsigned int x, unsigned int y)
  110. {
  111.     int color = *((__u16 *)(fbaddress + POINTPOS(x, y)));
  112.     return (((color >> 11) & 0x1f) << (16 + 3)) | (((color >> 5) & 0x3f) << (8 + 2)) | ((color & 0x1f) << 3);
  113. }
  114.  
  115. /** Put pixel - 8-bit depth (3:2:3) */
  116. static void putpixel_1byte(unsigned int x, unsigned int y, int color)
  117. {
  118.     fbaddress[POINTPOS(x, y)] = RED(color, 3) << 5 | GREEN(color, 2) << 3 | BLUE(color, 3);
  119. }
  120.  
  121. /** Return pixel color - 8-bit depth (3:2:3) */
  122. static int getpixel_1byte(unsigned int x, unsigned int y)
  123. {
  124.     int color = fbaddress[POINTPOS(x, y)];
  125.     return (((color >> 5) & 0x7) << (16 + 5)) | (((color >> 3) & 0x3) << (8 + 6)) | ((color & 0x7) << 5);
  126. }
  127.  
  128. /** Fill line with color BGCOLOR */
  129. static void clear_line(unsigned int y)
  130. {
  131.     unsigned int x;
  132.    
  133.     for (x = 0; x < xres; x++)
  134.         (*putpixel)(x, y, BGCOLOR);
  135. }
  136.  
  137.  
  138. /** Fill screen with background color */
  139. static void clear_screen(void)
  140. {
  141.     unsigned int y;
  142.  
  143.     for (y = 0; y < yres; y++)
  144.         clear_line(y);
  145. }
  146.  
  147.  
  148. /** Scroll screen one row up */
  149. static void scroll_screen(void)
  150. {
  151.     unsigned int i;
  152.  
  153.     memcpy((void *) fbaddress, (void *) &fbaddress[ROW_BYTES], scanline * yres - ROW_BYTES);
  154.  
  155.     /* Clear last row */
  156.     for (i = 0; i < FONT_SCANLINES; i++)
  157.         clear_line((rows - 1) * FONT_SCANLINES + i);
  158. }
  159.  
  160.  
  161. static void invert_pixel(unsigned int x, unsigned int y)
  162. {
  163.     (*putpixel)(x, y, ~(*getpixel)(x, y));
  164. }
  165.  
  166.  
  167. /** Draw one line of glyph at a given position */
  168. static void draw_glyph_line(unsigned int glline, unsigned int x, unsigned int y)
  169. {
  170.     unsigned int i;
  171.  
  172.     for (i = 0; i < 8; i++)
  173.         if (glline & (1 << (7 - i))) {
  174.             (*putpixel)(x + i, y, FGCOLOR);
  175.         } else
  176.             (*putpixel)(x + i, y, BGCOLOR);
  177. }
  178.  
  179. /***************************************************************/
  180. /* Character-console functions */
  181.  
  182. /** Draw character at given position */
  183. static void draw_glyph(__u8 glyph, unsigned int col, unsigned int row)
  184. {
  185.     unsigned int y;
  186.  
  187.     for (y = 0; y < FONT_SCANLINES; y++)
  188.         draw_glyph_line(fb_font[glyph * FONT_SCANLINES + y], col * COL_WIDTH, row * FONT_SCANLINES + y);
  189. }
  190.  
  191. /** Invert character at given position */
  192. static void invert_char(unsigned int col, unsigned int row)
  193. {
  194.     unsigned int x;
  195.     unsigned int y;
  196.  
  197.     for (x = 0; x < COL_WIDTH; x++)
  198.         for (y = 0; y < FONT_SCANLINES; y++)
  199.             invert_pixel(col * COL_WIDTH + x, row * FONT_SCANLINES + y);
  200. }
  201.  
  202. /** Draw character at default position */
  203. static void draw_char(char chr)
  204. {
  205.     draw_glyph(chr, position % columns, position / columns);
  206. }
  207.  
  208. static void draw_logo(unsigned int startx, unsigned int starty)
  209. {
  210.     unsigned int x;
  211.     unsigned int y;
  212.     unsigned int byte;
  213.     unsigned int rowbytes;
  214.  
  215.     rowbytes = (helenos_width - 1) / 8 + 1;
  216.  
  217.     for (y = 0; y < helenos_height; y++)
  218.         for (x = 0; x < helenos_width; x++) {
  219.             byte = helenos_bits[rowbytes * y + x / 8];
  220.             byte >>= x % 8;
  221.             if (byte & 1)
  222.                 (*putpixel)(startx + x, starty + y, LOGOCOLOR);
  223.         }
  224. }
  225.  
  226. /***************************************************************/
  227. /* Stdout specific functions */
  228.  
  229. static void invert_cursor(void)
  230. {
  231.     invert_char(position % columns, position / columns);
  232. }
  233.  
  234. /** Print character to screen
  235.  *
  236.  *  Emulate basic terminal commands
  237.  */
  238. static void fb_putchar(chardev_t *dev, char ch)
  239. {
  240.     spinlock_lock(&fb_lock);
  241.    
  242.     switch (ch) {
  243.         case '\n':
  244.             invert_cursor();
  245.             position += columns;
  246.             position -= position % columns;
  247.             break;
  248.         case '\r':
  249.             invert_cursor();
  250.             position -= position % columns;
  251.             break;
  252.         case '\b':
  253.             invert_cursor();
  254.             if (position % columns)
  255.                 position--;
  256.             break;
  257.         case '\t':
  258.             invert_cursor();
  259.             do {
  260.                 draw_char(' ');
  261.                 position++;
  262.             } while (position % 8);
  263.             break;
  264.         default:
  265.             draw_char(ch);
  266.             position++;
  267.     }
  268.    
  269.     if (position >= columns * rows) {
  270.         position -= columns;
  271.         scroll_screen();
  272.     }
  273.    
  274.     invert_cursor();
  275.    
  276.     spinlock_unlock(&fb_lock);
  277. }
  278.  
  279. static chardev_t framebuffer;
  280. static chardev_operations_t fb_ops = {
  281.     .write = fb_putchar,
  282. };
  283.  
  284.  
  285. /** Initialize framebuffer as a chardev output device
  286.  *
  287.  * @param addr Address of theframebuffer
  288.  * @param x    Screen width in pixels
  289.  * @param y    Screen height in pixels
  290.  * @param bpp  Bits per pixel (8, 16, 24, 32)
  291.  * @param scan Bytes per one scanline
  292.  *
  293.  */
  294. void fb_init(__address addr, unsigned int x, unsigned int y, unsigned int bpp, unsigned int scan)
  295. {
  296.     switch (bpp) {
  297.         case 8:
  298.             putpixel = putpixel_1byte;
  299.             getpixel = getpixel_1byte;
  300.             pixelbytes = 1;
  301.             break;
  302.         case 16:
  303.             putpixel = putpixel_2byte;
  304.             getpixel = getpixel_2byte;
  305.             pixelbytes = 2;
  306.             break;
  307.         case 24:
  308.             putpixel = putpixel_3byte;
  309.             getpixel = getpixel_3byte;
  310.             pixelbytes = 3;
  311.             break;
  312.         case 32:
  313.             putpixel = putpixel_4byte;
  314.             getpixel = getpixel_4byte;
  315.             pixelbytes = 4;
  316.             break;
  317.         default:
  318.             panic("Unsupported bpp");
  319.     }
  320.        
  321.     fbaddress = (unsigned char *) addr;
  322.     xres = x;
  323.     yres = y;
  324.     scanline = scan;
  325.    
  326.     rows = y / FONT_SCANLINES;
  327.     columns = x / COL_WIDTH;
  328.  
  329.     clear_screen();
  330.     draw_logo(xres - helenos_width, 0);
  331.     invert_cursor();
  332.  
  333.     chardev_initialize("fb", &framebuffer, &fb_ops);
  334.     stdout = &framebuffer;
  335. }
  336.