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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 <mm/slab.h>
  34. #include <panic.h>
  35. #include <memstr.h>
  36. #include <config.h>
  37.  
  38. #include "helenos.xbm"
  39.  
  40. SPINLOCK_INITIALIZE(fb_lock);
  41.  
  42. static __u8 *fbaddress = NULL;
  43.  
  44. static __u8 *blankline = NULL;
  45.  
  46. static unsigned int xres = 0;
  47. static unsigned int yres = 0;
  48. static unsigned int scanline = 0;
  49. static unsigned int pixelbytes = 0;
  50.  
  51. static unsigned int position = 0;
  52. static unsigned int columns = 0;
  53. static unsigned int rows = 0;
  54.  
  55.  
  56. #define COL_WIDTH   8
  57. #define ROW_BYTES   (scanline * FONT_SCANLINES)
  58.  
  59. #define BGCOLOR     0x000080
  60. #define FGCOLOR     0xffff00
  61. #define LOGOCOLOR   0x2020b0
  62.  
  63. #define RED(x, bits)    ((x >> (16 + 8 - bits)) & ((1 << bits) - 1))
  64. #define GREEN(x, bits)  ((x >> (8 + 8 - bits)) & ((1 << bits) - 1))
  65. #define BLUE(x, bits)   ((x >> (8 - bits)) & ((1 << bits) - 1))
  66.  
  67. #define POINTPOS(x, y)  (y * scanline + x * pixelbytes)
  68.  
  69. /***************************************************************/
  70. /* Pixel specific fuctions */
  71.  
  72. static void (*putpixel)(unsigned int x, unsigned int y, int color);
  73. static int (*getpixel)(unsigned int x, unsigned int y);
  74.  
  75. /** Put pixel - 24-bit depth, 1 free byte */
  76. static void putpixel_4byte(unsigned int x, unsigned int y, int color)
  77. {
  78.     *((__u32 *)(fbaddress + POINTPOS(x, y))) = color;
  79. }
  80.  
  81. /** Return pixel color - 24-bit depth, 1 free byte */
  82. static int getpixel_4byte(unsigned int x, unsigned int y)
  83. {
  84.     return *((__u32 *)(fbaddress + POINTPOS(x, y))) & 0xffffff;
  85. }
  86.  
  87. /** Put pixel - 24-bit depth */
  88. static void putpixel_3byte(unsigned int x, unsigned int y, int color)
  89. {
  90.     unsigned int startbyte = POINTPOS(x, y);
  91.  
  92. #ifdef BIG_ENDIAN
  93.     fbaddress[startbyte] = RED(color, 8);
  94.     fbaddress[startbyte + 1] = GREEN(color, 8);
  95.     fbaddress[startbyte + 2] = BLUE(color, 8);
  96. #else
  97.     fbaddress[startbyte + 2] = RED(color, 8);
  98.     fbaddress[startbyte + 1] = GREEN(color, 8);
  99.     fbaddress[startbyte + 0] = BLUE(color, 8);
  100. #endif 
  101. }
  102.  
  103. /** Return pixel color - 24-bit depth */
  104. static int getpixel_3byte(unsigned int x, unsigned int y)
  105. {
  106.     unsigned int startbyte = POINTPOS(x, y);
  107.  
  108. #ifdef BIG_ENDIAN
  109.     return fbaddress[startbyte] << 16 | fbaddress[startbyte + 1] << 8 | fbaddress[startbyte + 2];
  110. #else
  111.     return fbaddress[startbyte + 2] << 16 | fbaddress[startbyte + 1] << 8 | fbaddress[startbyte + 0];
  112. #endif 
  113. }
  114.  
  115. /** Put pixel - 16-bit depth (5:6:6) */
  116. static void putpixel_2byte(unsigned int x, unsigned int y, int color)
  117. {
  118.     /* 5-bit, 5-bits, 5-bits */
  119.     *((__u16 *)(fbaddress + POINTPOS(x, y))) = RED(color, 5) << 11 | GREEN(color, 6) << 5 | BLUE(color, 5);
  120. }
  121.  
  122. /** Return pixel color - 16-bit depth (5:6:6) */
  123. static int getpixel_2byte(unsigned int x, unsigned int y)
  124. {
  125.     int color = *((__u16 *)(fbaddress + POINTPOS(x, y)));
  126.     return (((color >> 11) & 0x1f) << (16 + 3)) | (((color >> 5) & 0x3f) << (8 + 2)) | ((color & 0x1f) << 3);
  127. }
  128.  
  129. /** Put pixel - 8-bit depth (3:2:3) */
  130. static void putpixel_1byte(unsigned int x, unsigned int y, int color)
  131. {
  132.     fbaddress[POINTPOS(x, y)] = RED(color, 3) << 5 | GREEN(color, 2) << 3 | BLUE(color, 3);
  133. }
  134.  
  135. /** Return pixel color - 8-bit depth (3:2:3) */
  136. static int getpixel_1byte(unsigned int x, unsigned int y)
  137. {
  138.     int color = fbaddress[POINTPOS(x, y)];
  139.     return (((color >> 5) & 0x7) << (16 + 5)) | (((color >> 3) & 0x3) << (8 + 6)) | ((color & 0x7) << 5);
  140. }
  141.  
  142. /** Fill line with color BGCOLOR */
  143. static void clear_line(unsigned int y)
  144. {
  145.     unsigned int x;
  146.    
  147.     for (x = 0; x < xres; x++)
  148.         (*putpixel)(x, y, BGCOLOR);
  149. }
  150.  
  151.  
  152. /** Fill screen with background color */
  153. static void clear_screen(void)
  154. {
  155.     unsigned int y;
  156.  
  157.     for (y = 0; y < yres; y++)
  158.         clear_line(y);
  159. }
  160.  
  161.  
  162. /** Scroll screen one row up */
  163. static void scroll_screen(void)
  164. {
  165.     unsigned int i;
  166.     __u8 *lastline = &fbaddress[(rows - 1) * ROW_BYTES];
  167.  
  168.     memcpy((void *) fbaddress, (void *) &fbaddress[ROW_BYTES], scanline * yres - ROW_BYTES);
  169.  
  170.     /* Clear last row */
  171.     if (blankline) {
  172.         memcpy((void *) lastline, (void *) blankline, ROW_BYTES);
  173.     } else {
  174.         for (i = 0; i < FONT_SCANLINES; i++)
  175.             clear_line((rows - 1) * FONT_SCANLINES + i);
  176.  
  177.         if (config.mm_initialized) {
  178.             /* Save a blank line aside. */
  179.             blankline = (__u8 *) malloc(ROW_BYTES, FRAME_ATOMIC);
  180.             if (blankline)
  181.                 memcpy((void *) blankline, (void *) lastline, ROW_BYTES);
  182.         }
  183.     }
  184. }
  185.  
  186.  
  187. static void invert_pixel(unsigned int x, unsigned int y)
  188. {
  189.     (*putpixel)(x, y, ~(*getpixel)(x, y));
  190. }
  191.  
  192.  
  193. /** Draw one line of glyph at a given position */
  194. static void draw_glyph_line(unsigned int glline, unsigned int x, unsigned int y)
  195. {
  196.     unsigned int i;
  197.  
  198.     for (i = 0; i < 8; i++)
  199.         if (glline & (1 << (7 - i))) {
  200.             (*putpixel)(x + i, y, FGCOLOR);
  201.         } else
  202.             (*putpixel)(x + i, y, BGCOLOR);
  203. }
  204.  
  205. /***************************************************************/
  206. /* Character-console functions */
  207.  
  208. /** Draw character at given position */
  209. static void draw_glyph(__u8 glyph, unsigned int col, unsigned int row)
  210. {
  211.     unsigned int y;
  212.  
  213.     for (y = 0; y < FONT_SCANLINES; y++)
  214.         draw_glyph_line(fb_font[glyph * FONT_SCANLINES + y], col * COL_WIDTH, row * FONT_SCANLINES + y);
  215. }
  216.  
  217. /** Invert character at given position */
  218. static void invert_char(unsigned int col, unsigned int row)
  219. {
  220.     unsigned int x;
  221.     unsigned int y;
  222.  
  223.     for (x = 0; x < COL_WIDTH; x++)
  224.         for (y = 0; y < FONT_SCANLINES; y++)
  225.             invert_pixel(col * COL_WIDTH + x, row * FONT_SCANLINES + y);
  226. }
  227.  
  228. /** Draw character at default position */
  229. static void draw_char(char chr)
  230. {
  231.     draw_glyph(chr, position % columns, position / columns);
  232. }
  233.  
  234. static void draw_logo(unsigned int startx, unsigned int starty)
  235. {
  236.     unsigned int x;
  237.     unsigned int y;
  238.     unsigned int byte;
  239.     unsigned int rowbytes;
  240.  
  241.     rowbytes = (helenos_width - 1) / 8 + 1;
  242.  
  243.     for (y = 0; y < helenos_height; y++)
  244.         for (x = 0; x < helenos_width; x++) {
  245.             byte = helenos_bits[rowbytes * y + x / 8];
  246.             byte >>= x % 8;
  247.             if (byte & 1)
  248.                 (*putpixel)(startx + x, starty + y, LOGOCOLOR);
  249.         }
  250. }
  251.  
  252. /***************************************************************/
  253. /* Stdout specific functions */
  254.  
  255. static void invert_cursor(void)
  256. {
  257.     invert_char(position % columns, position / columns);
  258. }
  259.  
  260. /** Print character to screen
  261.  *
  262.  *  Emulate basic terminal commands
  263.  */
  264. static void fb_putchar(chardev_t *dev, char ch)
  265. {
  266.     spinlock_lock(&fb_lock);
  267.    
  268.     switch (ch) {
  269.         case '\n':
  270.             invert_cursor();
  271.             position += columns;
  272.             position -= position % columns;
  273.             break;
  274.         case '\r':
  275.             invert_cursor();
  276.             position -= position % columns;
  277.             break;
  278.         case '\b':
  279.             invert_cursor();
  280.             if (position % columns)
  281.                 position--;
  282.             break;
  283.         case '\t':
  284.             invert_cursor();
  285.             do {
  286.                 draw_char(' ');
  287.                 position++;
  288.             } while ((position % 8) && position < columns * rows);
  289.             break;
  290.         default:
  291.             draw_char(ch);
  292.             position++;
  293.     }
  294.    
  295.     if (position >= columns * rows) {
  296.         position -= columns;
  297.         scroll_screen();
  298.     }
  299.    
  300.     invert_cursor();
  301.    
  302.     spinlock_unlock(&fb_lock);
  303. }
  304.  
  305. static chardev_t framebuffer;
  306. static chardev_operations_t fb_ops = {
  307.     .write = fb_putchar,
  308. };
  309.  
  310.  
  311. /** Initialize framebuffer as a chardev output device
  312.  *
  313.  * @param addr Address of theframebuffer
  314.  * @param x    Screen width in pixels
  315.  * @param y    Screen height in pixels
  316.  * @param bpp  Bits per pixel (8, 16, 24, 32)
  317.  * @param scan Bytes per one scanline
  318.  *
  319.  */
  320. void fb_init(__address addr, unsigned int x, unsigned int y, unsigned int bpp, unsigned int scan)
  321. {
  322.     switch (bpp) {
  323.         case 8:
  324.             putpixel = putpixel_1byte;
  325.             getpixel = getpixel_1byte;
  326.             pixelbytes = 1;
  327.             break;
  328.         case 16:
  329.             putpixel = putpixel_2byte;
  330.             getpixel = getpixel_2byte;
  331.             pixelbytes = 2;
  332.             break;
  333.         case 24:
  334.             putpixel = putpixel_3byte;
  335.             getpixel = getpixel_3byte;
  336.             pixelbytes = 3;
  337.             break;
  338.         case 32:
  339.             putpixel = putpixel_4byte;
  340.             getpixel = getpixel_4byte;
  341.             pixelbytes = 4;
  342.             break;
  343.         default:
  344.             panic("Unsupported bpp");
  345.     }
  346.        
  347.     fbaddress = (unsigned char *) addr;
  348.     xres = x;
  349.     yres = y;
  350.     scanline = scan;
  351.    
  352.     rows = y / FONT_SCANLINES;
  353.     columns = x / COL_WIDTH;
  354.  
  355.     clear_screen();
  356.     draw_logo(xres - helenos_width, 0);
  357.     invert_cursor();
  358.  
  359.     chardev_initialize("fb", &framebuffer, &fb_ops);
  360.     stdout = &framebuffer;
  361. }
  362.