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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. #ifdef BIG_ENDIAN
  89.     fbaddress[startbyte] = RED(color, 8);
  90.     fbaddress[startbyte + 1] = GREEN(color, 8);
  91.     fbaddress[startbyte + 2] = BLUE(color, 8);
  92. #else
  93.     fbaddress[startbyte + 2] = RED(color, 8);
  94.     fbaddress[startbyte + 1] = GREEN(color, 8);
  95.     fbaddress[startbyte + 0] = BLUE(color, 8);
  96. #endif 
  97. }
  98.  
  99. /** Return pixel color - 24-bit depth */
  100. static int getpixel_3byte(unsigned int x, unsigned int y)
  101. {
  102.     unsigned int startbyte = POINTPOS(x, y);
  103.  
  104. #ifdef BIG_ENDIAN
  105.     return fbaddress[startbyte] << 16 | fbaddress[startbyte + 1] << 8 | fbaddress[startbyte + 2];
  106. #else
  107.     return fbaddress[startbyte + 2] << 16 | fbaddress[startbyte + 1] << 8 | fbaddress[startbyte + 0];
  108. #endif 
  109. }
  110.  
  111. /** Put pixel - 16-bit depth (5:6:6) */
  112. static void putpixel_2byte(unsigned int x, unsigned int y, int color)
  113. {
  114.     /* 5-bit, 5-bits, 5-bits */
  115.     *((__u16 *)(fbaddress + POINTPOS(x, y))) = RED(color, 5) << 11 | GREEN(color, 6) << 5 | BLUE(color, 5);
  116. }
  117.  
  118. /** Return pixel color - 16-bit depth (5:6:6) */
  119. static int getpixel_2byte(unsigned int x, unsigned int y)
  120. {
  121.     int color = *((__u16 *)(fbaddress + POINTPOS(x, y)));
  122.     return (((color >> 11) & 0x1f) << (16 + 3)) | (((color >> 5) & 0x3f) << (8 + 2)) | ((color & 0x1f) << 3);
  123. }
  124.  
  125. /** Put pixel - 8-bit depth (3:2:3) */
  126. static void putpixel_1byte(unsigned int x, unsigned int y, int color)
  127. {
  128.     fbaddress[POINTPOS(x, y)] = RED(color, 3) << 5 | GREEN(color, 2) << 3 | BLUE(color, 3);
  129. }
  130.  
  131. /** Return pixel color - 8-bit depth (3:2:3) */
  132. static int getpixel_1byte(unsigned int x, unsigned int y)
  133. {
  134.     int color = fbaddress[POINTPOS(x, y)];
  135.     return (((color >> 5) & 0x7) << (16 + 5)) | (((color >> 3) & 0x3) << (8 + 6)) | ((color & 0x7) << 5);
  136. }
  137.  
  138. /** Fill line with color BGCOLOR */
  139. static void clear_line(unsigned int y)
  140. {
  141.     unsigned int x;
  142.    
  143.     for (x = 0; x < xres; x++)
  144.         (*putpixel)(x, y, BGCOLOR);
  145. }
  146.  
  147.  
  148. /** Fill screen with background color */
  149. static void clear_screen(void)
  150. {
  151.     unsigned int y;
  152.  
  153.     for (y = 0; y < yres; y++)
  154.         clear_line(y);
  155. }
  156.  
  157.  
  158. /** Scroll screen one row up */
  159. static void scroll_screen(void)
  160. {
  161.     unsigned int i;
  162.  
  163.     memcpy((void *) fbaddress, (void *) &fbaddress[ROW_BYTES], scanline * yres - ROW_BYTES);
  164.  
  165.     /* Clear last row */
  166.     for (i = 0; i < FONT_SCANLINES; i++)
  167.         clear_line((rows - 1) * FONT_SCANLINES + i);
  168. }
  169.  
  170.  
  171. static void invert_pixel(unsigned int x, unsigned int y)
  172. {
  173.     (*putpixel)(x, y, ~(*getpixel)(x, y));
  174. }
  175.  
  176.  
  177. /** Draw one line of glyph at a given position */
  178. static void draw_glyph_line(unsigned int glline, unsigned int x, unsigned int y)
  179. {
  180.     unsigned int i;
  181.  
  182.     for (i = 0; i < 8; i++)
  183.         if (glline & (1 << (7 - i))) {
  184.             (*putpixel)(x + i, y, FGCOLOR);
  185.         } else
  186.             (*putpixel)(x + i, y, BGCOLOR);
  187. }
  188.  
  189. /***************************************************************/
  190. /* Character-console functions */
  191.  
  192. /** Draw character at given position */
  193. static void draw_glyph(__u8 glyph, unsigned int col, unsigned int row)
  194. {
  195.     unsigned int y;
  196.  
  197.     for (y = 0; y < FONT_SCANLINES; y++)
  198.         draw_glyph_line(fb_font[glyph * FONT_SCANLINES + y], col * COL_WIDTH, row * FONT_SCANLINES + y);
  199. }
  200.  
  201. /** Invert character at given position */
  202. static void invert_char(unsigned int col, unsigned int row)
  203. {
  204.     unsigned int x;
  205.     unsigned int y;
  206.  
  207.     for (x = 0; x < COL_WIDTH; x++)
  208.         for (y = 0; y < FONT_SCANLINES; y++)
  209.             invert_pixel(col * COL_WIDTH + x, row * FONT_SCANLINES + y);
  210. }
  211.  
  212. /** Draw character at default position */
  213. static void draw_char(char chr)
  214. {
  215.     draw_glyph(chr, position % columns, position / columns);
  216. }
  217.  
  218. static void draw_logo(unsigned int startx, unsigned int starty)
  219. {
  220.     unsigned int x;
  221.     unsigned int y;
  222.     unsigned int byte;
  223.     unsigned int rowbytes;
  224.  
  225.     rowbytes = (helenos_width - 1) / 8 + 1;
  226.  
  227.     for (y = 0; y < helenos_height; y++)
  228.         for (x = 0; x < helenos_width; x++) {
  229.             byte = helenos_bits[rowbytes * y + x / 8];
  230.             byte >>= x % 8;
  231.             if (byte & 1)
  232.                 (*putpixel)(startx + x, starty + y, LOGOCOLOR);
  233.         }
  234. }
  235.  
  236. /***************************************************************/
  237. /* Stdout specific functions */
  238.  
  239. static void invert_cursor(void)
  240. {
  241.     invert_char(position % columns, position / columns);
  242. }
  243.  
  244. /** Print character to screen
  245.  *
  246.  *  Emulate basic terminal commands
  247.  */
  248. static void fb_putchar(chardev_t *dev, char ch)
  249. {
  250.     spinlock_lock(&fb_lock);
  251.    
  252.     switch (ch) {
  253.         case '\n':
  254.             invert_cursor();
  255.             position += columns;
  256.             position -= position % columns;
  257.             break;
  258.         case '\r':
  259.             invert_cursor();
  260.             position -= position % columns;
  261.             break;
  262.         case '\b':
  263.             invert_cursor();
  264.             if (position % columns)
  265.                 position--;
  266.             break;
  267.         case '\t':
  268.             invert_cursor();
  269.             do {
  270.                 draw_char(' ');
  271.                 position++;
  272.             } while (position % 8);
  273.             break;
  274.         default:
  275.             draw_char(ch);
  276.             position++;
  277.     }
  278.    
  279.     if (position >= columns * rows) {
  280.         position -= columns;
  281.         scroll_screen();
  282.     }
  283.    
  284.     invert_cursor();
  285.    
  286.     spinlock_unlock(&fb_lock);
  287. }
  288.  
  289. static chardev_t framebuffer;
  290. static chardev_operations_t fb_ops = {
  291.     .write = fb_putchar,
  292. };
  293.  
  294.  
  295. /** Initialize framebuffer as a chardev output device
  296.  *
  297.  * @param addr Address of theframebuffer
  298.  * @param x    Screen width in pixels
  299.  * @param y    Screen height in pixels
  300.  * @param bpp  Bits per pixel (8, 16, 24, 32)
  301.  * @param scan Bytes per one scanline
  302.  *
  303.  */
  304. void fb_init(__address addr, unsigned int x, unsigned int y, unsigned int bpp, unsigned int scan)
  305. {
  306.     switch (bpp) {
  307.         case 8:
  308.             putpixel = putpixel_1byte;
  309.             getpixel = getpixel_1byte;
  310.             pixelbytes = 1;
  311.             break;
  312.         case 16:
  313.             putpixel = putpixel_2byte;
  314.             getpixel = getpixel_2byte;
  315.             pixelbytes = 2;
  316.             break;
  317.         case 24:
  318.             putpixel = putpixel_3byte;
  319.             getpixel = getpixel_3byte;
  320.             pixelbytes = 3;
  321.             break;
  322.         case 32:
  323.             putpixel = putpixel_4byte;
  324.             getpixel = getpixel_4byte;
  325.             pixelbytes = 4;
  326.             break;
  327.         default:
  328.             panic("Unsupported bpp");
  329.     }
  330.        
  331.     fbaddress = (unsigned char *) addr;
  332.     xres = x;
  333.     yres = y;
  334.     scanline = scan;
  335.    
  336.     rows = y / FONT_SCANLINES;
  337.     columns = x / COL_WIDTH;
  338.  
  339.     clear_screen();
  340.     draw_logo(xres - helenos_width, 0);
  341.     invert_cursor();
  342.  
  343.     chardev_initialize("fb", &framebuffer, &fb_ops);
  344.     stdout = &framebuffer;
  345. }
  346.