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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. /** @addtogroup genarch
  30.  * @{
  31.  */
  32. /** @file
  33.  */
  34.  
  35. #include <genarch/fb/font-8x16.h>
  36. #include <genarch/fb/visuals.h>
  37. #include <genarch/fb/fb.h>
  38. #include <console/chardev.h>
  39. #include <console/console.h>
  40. #include <sysinfo/sysinfo.h>
  41. #include <mm/slab.h>
  42. #include <align.h>
  43. #include <panic.h>
  44. #include <memstr.h>
  45. #include <config.h>
  46. #include <bitops.h>
  47. #include <print.h>
  48.  
  49. #include "helenos.xbm"
  50.  
  51. SPINLOCK_INITIALIZE(fb_lock);
  52.  
  53. static uint8_t *fbaddress = NULL;
  54.  
  55. static uint8_t *blankline = NULL;
  56. static uint8_t *dbbuffer = NULL; /* Buffer for fast scrolling console */
  57. static int dboffset;
  58.  
  59. static unsigned int xres = 0;
  60. static unsigned int yres = 0;
  61. static unsigned int scanline = 0;
  62. static unsigned int pixelbytes = 0;
  63. #ifdef FB_INVERT_COLORS
  64. static bool invert_colors = true;
  65. #else
  66. static bool invert_colors = false;
  67. #endif
  68.  
  69. static unsigned int position = 0;
  70. static unsigned int columns = 0;
  71. static unsigned int rows = 0;
  72.  
  73. #define COL_WIDTH   8
  74. #define ROW_BYTES   (scanline * FONT_SCANLINES)
  75.  
  76. #define BGCOLOR     0x000080
  77. #define FGCOLOR     0xffff00
  78. #define LOGOCOLOR   0x2020b0
  79.  
  80. #define RED(x, bits)    ((x >> (16 + 8 - bits)) & ((1 << bits) - 1))
  81. #define GREEN(x, bits)  ((x >> (8 + 8 - bits)) & ((1 << bits) - 1))
  82. #define BLUE(x, bits)   ((x >> (8 - bits)) & ((1 << bits) - 1))
  83.  
  84. #define POINTPOS(x, y)  ((y) * scanline + (x) * pixelbytes)
  85.  
  86. /***************************************************************/
  87. /* Pixel specific fuctions */
  88.  
  89. static void (*rgb2scr)(void *, int);
  90. static int (*scr2rgb)(void *);
  91.  
  92. static inline int COLOR(int color)
  93. {
  94.     return invert_colors ? ~color : color;
  95. }
  96.  
  97. /* Conversion routines between different color representations */
  98. static void rgb_byte0888(void *dst, int rgb)
  99. {
  100.     *((int *) dst) = rgb;
  101. }
  102.  
  103. static int byte0888_rgb(void *src)
  104. {
  105.     return (*((int *) src)) & 0xffffff;
  106. }
  107.  
  108. static void rgb_byte888(void *dst, int rgb)
  109. {
  110.     uint8_t *scr = dst;
  111. #if defined(FB_INVERT_ENDIAN)
  112.     scr[0] = RED(rgb, 8);
  113.     scr[1] = GREEN(rgb, 8);
  114.     scr[2] = BLUE(rgb, 8);
  115. #else
  116.     scr[2] = RED(rgb, 8);
  117.     scr[1] = GREEN(rgb, 8);
  118.     scr[0] = BLUE(rgb, 8);
  119. #endif
  120. }
  121.  
  122. static int byte888_rgb(void *src)
  123. {
  124.     uint8_t *scr = src;
  125. #if defined(FB_INVERT_ENDIAN)
  126.     return scr[0] << 16 | scr[1] << 8 | scr[2];
  127. #else
  128.     return scr[2] << 16 | scr[1] << 8 | scr[0];
  129. #endif 
  130. }
  131.  
  132. /**  16-bit depth (5:5:5) */
  133. static void rgb_byte555(void *dst, int rgb)
  134. {
  135.     /* 5-bit, 5-bits, 5-bits */
  136.     *((uint16_t *) dst) = RED(rgb, 5) << 10 | GREEN(rgb, 5) << 5 | BLUE(rgb, 5);
  137. }
  138.  
  139. /** 16-bit depth (5:5:5) */
  140. static int byte555_rgb(void *src)
  141. {
  142.     int color = *(uint16_t *)(src);
  143.     return (((color >> 10) & 0x1f) << (16 + 3)) | (((color >> 5) & 0x1f) << (8 + 3)) | ((color & 0x1f) << 3);
  144. }
  145.  
  146. /**  16-bit depth (5:6:5) */
  147. static void rgb_byte565(void *dst, int rgb)
  148. {
  149.     /* 5-bit, 6-bits, 5-bits */
  150.     *((uint16_t *) dst) = RED(rgb, 5) << 11 | GREEN(rgb, 6) << 5 | BLUE(rgb, 5);
  151. }
  152.  
  153. /** 16-bit depth (5:6:5) */
  154. static int byte565_rgb(void *src)
  155. {
  156.     int color = *(uint16_t *)(src);
  157.     return (((color >> 11) & 0x1f) << (16 + 3)) | (((color >> 5) & 0x3f) << (8 + 2)) | ((color & 0x1f) << 3);
  158. }
  159.  
  160. /** Put pixel - 8-bit depth (color palette/3:2:3)
  161.  *
  162.  * Even though we try 3:2:3 color scheme here, an 8-bit framebuffer
  163.  * will most likely use a color palette. The color appearance
  164.  * will be pretty random and depend on the default installed
  165.  * palette. This could be fixed by supporting custom palette
  166.  * and setting it to simulate the 8-bit truecolor.
  167.  */
  168. static void rgb_byte8(void *dst, int rgb)
  169. {
  170.     *((uint8_t *) dst) = RED(rgb, 3) << 5 | GREEN(rgb, 2) << 3 | BLUE(rgb, 3);
  171. }
  172.  
  173. /** Return pixel color - 8-bit depth (color palette/3:2:3)
  174.  *
  175.  * See the comment for rgb_byte().
  176.  */
  177. static int byte8_rgb(void *src)
  178. {
  179.     int color = *(uint8_t *)src;
  180.     return (((color >> 5) & 0x7) << (16 + 5)) | (((color >> 3) & 0x3) << (8 + 6)) | ((color & 0x7) << 5);
  181. }
  182.  
  183. static void putpixel(unsigned int x, unsigned int y, int color)
  184. {
  185.     (*rgb2scr)(&fbaddress[POINTPOS(x, y)], COLOR(color));
  186.  
  187.     if (dbbuffer) {
  188.         int dline = (y + dboffset) % yres;
  189.         (*rgb2scr)(&dbbuffer[POINTPOS(x, dline)], COLOR(color));
  190.     }
  191. }
  192.  
  193. /** Get pixel from viewport */
  194. static int getpixel(unsigned int x, unsigned int y)
  195. {
  196.     if (dbbuffer) {
  197.         int dline = (y + dboffset) % yres;
  198.         return COLOR((*scr2rgb)(&dbbuffer[POINTPOS(x, dline)]));
  199.     }
  200.     return COLOR((*scr2rgb)(&fbaddress[POINTPOS(x, y)]));
  201. }
  202.  
  203.  
  204. /** Fill screen with background color */
  205. static void clear_screen(void)
  206. {
  207.     unsigned int y;
  208.  
  209.     for (y = 0; y < yres; y++) {
  210.         memcpy(&fbaddress[scanline * y], blankline, xres * pixelbytes);
  211.         if (dbbuffer)
  212.             memcpy(&dbbuffer[scanline * y], blankline, xres * pixelbytes);
  213.     }
  214. }
  215.  
  216.  
  217. /** Scroll screen one row up */
  218. static void scroll_screen(void)
  219. {
  220.     uint8_t *lastline = &fbaddress[(rows - 1) * ROW_BYTES];
  221.     int firstsz;
  222.  
  223.     if (dbbuffer) {
  224.         memcpy(&dbbuffer[dboffset * scanline], blankline, ROW_BYTES);
  225.        
  226.         dboffset = (dboffset + FONT_SCANLINES) % yres;
  227.         firstsz = yres - dboffset;
  228.  
  229.         memcpy(fbaddress, &dbbuffer[scanline * dboffset], firstsz * scanline);
  230.         memcpy(&fbaddress[firstsz * scanline], dbbuffer, dboffset * scanline);
  231.     } else {
  232.         memcpy((void *) fbaddress, (void *) &fbaddress[ROW_BYTES], scanline * yres - ROW_BYTES);
  233.         /* Clear last row */
  234.         memcpy((void *) lastline, (void *) blankline, ROW_BYTES);
  235.     }
  236. }
  237.  
  238.  
  239. static void invert_pixel(unsigned int x, unsigned int y)
  240. {
  241.     putpixel(x, y, ~getpixel(x, y));
  242. }
  243.  
  244.  
  245. /** Draw one line of glyph at a given position */
  246. static void draw_glyph_line(unsigned int glline, unsigned int x, unsigned int y)
  247. {
  248.     unsigned int i;
  249.  
  250.     for (i = 0; i < 8; i++)
  251.         if (glline & (1 << (7 - i))) {
  252.             putpixel(x + i, y, FGCOLOR);
  253.         } else
  254.             putpixel(x + i, y, BGCOLOR);
  255. }
  256.  
  257. /***************************************************************/
  258. /* Character-console functions */
  259.  
  260. /** Draw character at given position */
  261. static void draw_glyph(uint8_t glyph, unsigned int col, unsigned int row)
  262. {
  263.     unsigned int y;
  264.  
  265.     for (y = 0; y < FONT_SCANLINES; y++)
  266.         draw_glyph_line(fb_font[glyph * FONT_SCANLINES + y], col * COL_WIDTH, row * FONT_SCANLINES + y);
  267. }
  268.  
  269. /** Invert character at given position */
  270. static void invert_char(unsigned int col, unsigned int row)
  271. {
  272.     unsigned int x;
  273.     unsigned int y;
  274.  
  275.     for (x = 0; x < COL_WIDTH; x++)
  276.         for (y = 0; y < FONT_SCANLINES; y++)
  277.             invert_pixel(col * COL_WIDTH + x, row * FONT_SCANLINES + y);
  278. }
  279.  
  280. /** Draw character at default position */
  281. static void draw_char(char chr)
  282. {
  283.     draw_glyph(chr, position % columns, position / columns);
  284. }
  285.  
  286. static void draw_logo(unsigned int startx, unsigned int starty)
  287. {
  288.     unsigned int x;
  289.     unsigned int y;
  290.     unsigned int byte;
  291.     unsigned int rowbytes;
  292.  
  293.     rowbytes = (helenos_width - 1) / 8 + 1;
  294.  
  295.     for (y = 0; y < helenos_height; y++)
  296.         for (x = 0; x < helenos_width; x++) {
  297.             byte = helenos_bits[rowbytes * y + x / 8];
  298.             byte >>= x % 8;
  299.             if (byte & 1)
  300.                 putpixel(startx + x, starty + y, COLOR(LOGOCOLOR));
  301.         }
  302. }
  303.  
  304. /***************************************************************/
  305. /* Stdout specific functions */
  306.  
  307. static void invert_cursor(void)
  308. {
  309.     invert_char(position % columns, position / columns);
  310. }
  311.  
  312. /** Print character to screen
  313.  *
  314.  *  Emulate basic terminal commands
  315.  */
  316. static void fb_putchar(chardev_t *dev, char ch)
  317. {
  318.     spinlock_lock(&fb_lock);
  319.    
  320.     switch (ch) {
  321.     case '\n':
  322.         invert_cursor();
  323.         position += columns;
  324.         position -= position % columns;
  325.         break;
  326.     case '\r':
  327.         invert_cursor();
  328.         position -= position % columns;
  329.         break;
  330.     case '\b':
  331.         invert_cursor();
  332.         if (position % columns)
  333.             position--;
  334.         break;
  335.     case '\t':
  336.         invert_cursor();
  337.         do {
  338.             draw_char(' ');
  339.             position++;
  340.         } while ((position % 8) && position < columns * rows);
  341.         break;
  342.     default:
  343.         draw_char(ch);
  344.         position++;
  345.     }
  346.    
  347.     if (position >= columns * rows) {
  348.         position -= columns;
  349.         scroll_screen();
  350.     }
  351.    
  352.     invert_cursor();
  353.    
  354.     spinlock_unlock(&fb_lock);
  355. }
  356.  
  357. static chardev_t framebuffer;
  358. static chardev_operations_t fb_ops = {
  359.     .write = fb_putchar,
  360. };
  361.  
  362.  
  363. /** Initialize framebuffer as a chardev output device
  364.  *
  365.  * @param addr   Physical address of the framebuffer
  366.  * @param x      Screen width in pixels
  367.  * @param y      Screen height in pixels
  368.  * @param scan   Bytes per one scanline
  369.  * @param visual Color model
  370.  *
  371.  */
  372. void fb_init(uintptr_t addr, unsigned int x, unsigned int y, unsigned int scan, unsigned int visual)
  373. {
  374.     switch (visual) {
  375.     case VISUAL_INDIRECT_8:
  376.         rgb2scr = rgb_byte8;
  377.         scr2rgb = byte8_rgb;
  378.         pixelbytes = 1;
  379.         break;
  380.     case VISUAL_RGB_5_5_5:
  381.         rgb2scr = rgb_byte555;
  382.         scr2rgb = byte555_rgb;
  383.         pixelbytes = 2;
  384.         break;
  385.     case VISUAL_RGB_5_6_5:
  386.         rgb2scr = rgb_byte565;
  387.         scr2rgb = byte565_rgb;
  388.         pixelbytes = 2;
  389.         break;
  390.     case VISUAL_RGB_8_8_8:
  391.         rgb2scr = rgb_byte888;
  392.         scr2rgb = byte888_rgb;
  393.         pixelbytes = 3;
  394.         break;
  395.     case VISUAL_RGB_8_8_8_0:
  396.         rgb2scr = rgb_byte888;
  397.         scr2rgb = byte888_rgb;
  398.         pixelbytes = 4;
  399.         break;
  400.     case VISUAL_RGB_0_8_8_8:
  401.         rgb2scr = rgb_byte0888;
  402.         scr2rgb = byte0888_rgb;
  403.         pixelbytes = 4;
  404.         break;
  405.     default:
  406.         panic("Unsupported visual.\n");
  407.     }
  408.    
  409.     unsigned int fbsize = scan * y;
  410.    
  411.     /* Map the framebuffer */
  412.     fbaddress = (uint8_t *) hw_map((uintptr_t) addr, fbsize);
  413.    
  414.     xres = x;
  415.     yres = y;
  416.     scanline = scan;
  417.    
  418.     rows = y / FONT_SCANLINES;
  419.     columns = x / COL_WIDTH;
  420.  
  421.     sysinfo_set_item_val("fb", NULL, true);
  422.     sysinfo_set_item_val("fb.kind", NULL, 1);
  423.     sysinfo_set_item_val("fb.width", NULL, xres);
  424.     sysinfo_set_item_val("fb.height", NULL, yres);
  425.     sysinfo_set_item_val("fb.scanline", NULL, scan);
  426.     sysinfo_set_item_val("fb.visual", NULL, visual);
  427.     sysinfo_set_item_val("fb.address.physical", NULL, addr);
  428.     sysinfo_set_item_val("fb.invert-colors", NULL, invert_colors);
  429.  
  430.     /* Allocate double buffer */
  431.     unsigned int order = fnzb(SIZE2FRAMES(ALIGN_UP(fbsize, FRAME_SIZE))) + 1;
  432.     dbbuffer = (uint8_t * ) frame_alloc(order, FRAME_ATOMIC | FRAME_KA);
  433.     if (!dbbuffer)
  434.         printf("Failed to allocate scroll buffer.\n");
  435.     dboffset = 0;
  436.  
  437.     /* Initialized blank line */
  438.     blankline = (uint8_t *) malloc(ROW_BYTES, FRAME_ATOMIC);
  439.     if (!blankline)
  440.         panic("Failed to allocate blank line for framebuffer.");
  441.     for (y = 0; y < FONT_SCANLINES; y++)
  442.         for (x = 0; x < xres; x++)
  443.             (*rgb2scr)(&blankline[POINTPOS(x, y)], COLOR(BGCOLOR));
  444.    
  445.     clear_screen();
  446.  
  447.     /* Update size of screen to match text area */
  448.     yres = rows * FONT_SCANLINES;
  449.  
  450.     draw_logo(xres - helenos_width, 0);
  451.     invert_cursor();
  452.  
  453.     chardev_initialize("fb", &framebuffer, &fb_ops);
  454.     stdout = &framebuffer;
  455. }
  456.  
  457. /** @}
  458.  */
  459.