i386/boot2/graphics.c

   1 /*
   2  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
   7  * Reserved.  This file contains Original Code and/or Modifications of
   8  * Original Code as defined in and that are subject to the Apple Public
   9  * Source License Version 1.1 (the "License").  You may not use this file
  10  * except in compliance with the License.  Please obtain a copy of the
  11  * License at http://www.apple.com/publicsource and read it before using
  12  * this file.
  13  *
  14  * The Original Code and all software distributed under the License are
  15  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  16  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  17  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE OR NON- INFRINGEMENT.  Please see the
  19  * License for the specific language governing rights and limitations
  20  * under the License.
  21  *
  22  * @APPLE_LICENSE_HEADER_END@
  23  */
  24 /*
  25  * Copyright 1993 NeXT, Inc.
  26  * All rights reserved.
  27  */
  28
  29 #include "libsaio.h"
  30 #include "boot.h"
  31 #include "vbe.h"
  32 #include "kernBootStruct.h"
  33
  34 #define CHAR_W         8
  35 #define CHAR_W_SHIFT   3
  36 #define CHAR_H         16
  37 #define CHAR_H_SHIFT   4
  38 #define BYTE_SHIFT     3
  39 #define NCOLS          (screen_width / CHAR_W)
  40 #define NROWS          (screen_height / CHAR_H)
  41 #define SCREEN_W       (screen_width)
  42 #define SCREEN_H       (screen_height)
  43
  44 /*
  45  * Forward declarations.
  46  */
  47 static int convert_vbe_mode(char * mode_name, int * mode);
  48 BOOL gSilentBoot;
  49
  50 //==========================================================================
  51 // Display a (optionally centered) text message.
  52
  53 void
  54 message(char * str, int centered)
  55 {
  56         register int x;
  57
  58         x = (NCOLS - strlen(str)) >> 1;
  59
  60         if ( currentMode() == TEXT_MODE )
  61     {
  62             if (centered)
  63         {
  64             while(x--) printf(" ");
  65         }
  66             printf("%s\n", str);
  67         }
  68 }
  69
  70 /*
  71  * for spinning disk
  72  */
  73 static int currentIndicator = 0;
  74
  75 //==========================================================================
  76 // Set the screen mode: TEXT_MODE or GRAPHICS_MODE
  77
  78 void
  79 setMode(int mode)
  80 {
  81         unsigned int vmode;
  82         char *       vmode_name;
  83     int          err = errSuccess;
  84
  85     if ( currentMode() == mode ) return;
  86
  87     if ( mode == GRAPHICS_MODE &&
  88         (vmode_name = newStringForKey(kGraphicsModeKey)) != 0)
  89     {
  90         // Set to the graphics mode specified in the config table file,
  91         // enable linear frame buffer mode, and update kernBootStruct.
  92
  93         if ( convert_vbe_mode(vmode_name, &vmode) == 0 )
  94             vmode = mode1024x768x256;   /* default mode */
  95
  96         err = set_linear_video_mode(vmode);
  97
  98         if ( err == errSuccess )
  99         {
 100             kernBootStruct->graphicsMode     = GRAPHICS_MODE;
 101             kernBootStruct->video.v_display  = gSilentBoot;
 102             kernBootStruct->video.v_baseAddr = (unsigned long) frame_buffer;
 103             kernBootStruct->video.v_width    = SCREEN_W;
 104             kernBootStruct->video.v_height   = SCREEN_H;
 105             kernBootStruct->video.v_depth    = bits_per_pixel;
 106             kernBootStruct->video.v_rowBytes = (screen_rowbytes == 0) ?
 107                 (SCREEN_W * bits_per_pixel) >> BYTE_SHIFT : screen_rowbytes;
 108         }
 109
 110         free(vmode_name);
 111     }
 112
 113     if ( (mode == TEXT_MODE) || (err != errSuccess) )
 114     {
 115         video_mode(2);  // 80x25 text mode
 116
 117         kernBootStruct->graphicsMode     = TEXT_MODE;
 118         kernBootStruct->video.v_display  = 0;
 119         kernBootStruct->video.v_baseAddr = (unsigned long) 0xb8000;
 120         kernBootStruct->video.v_width    = 80;
 121         kernBootStruct->video.v_height   = 25;
 122         kernBootStruct->video.v_depth    = 8;
 123         kernBootStruct->video.v_rowBytes = 0x8000;
 124     }
 125
 126         currentIndicator = 0;
 127 }
 128
 129 //==========================================================================
 130 // Return the current screen mode, TEXT_MODE or GRAPHICS_MODE.
 131
 132 int currentMode(void)
 133 {
 134     return kernBootStruct->graphicsMode;
 135 }
 136
 137 //==========================================================================
 138 // Convert from a string describing a graphics mode, to a VGA mode number.
 139
 140 typedef struct {
 141     char mode_name[15];
 142     int  mode_val;
 143 } mode_table_t;
 144
 145 mode_table_t mode_table[] = {
 146     { "640x400x256",   mode640x400x256   },
 147     { "640x480x256",   mode640x480x256   },
 148     { "800x600x16",    mode800x600x16    },
 149     { "800x600x256",   mode800x600x256   },
 150     { "1024x768x16",   mode1024x768x16   },
 151     { "1024x768x256",  mode1024x768x256  },
 152     { "1280x1024x16",  mode1280x1024x16  },
 153     { "1280x1024x256", mode1280x1024x256 },
 154     { "640x480x555",   mode640x480x555   },
 155     { "640x480x888",   mode640x480x888   },
 156     { "800x600x555",   mode800x600x555   },
 157     { "800x600x888",   mode800x600x888   },
 158     { "1024x768x555",  mode1024x768x555  },
 159     { "1024x768x888",  mode1024x768x888  },
 160     { "1280x1024x555", mode1280x1024x555 },
 161     { "1280x1024x888", mode1280x1024x888 },
 162     { "", 0 }
 163 };
 164
 165 int convert_vbe_mode(char * mode_name, int * mode)
 166 {
 167     mode_table_t * mtp = mode_table;
 168
 169     if (mode_name == 0 || *mode_name == 0)
 170         return 0;
 171
 172     while ( *mtp->mode_name )
 173     {
 174         if (strcmp(mtp->mode_name, mode_name) == 0)
 175         {
 176                 *mode =  mtp->mode_val;
 177                 return 1;
 178         }
 179         mtp++;
 180     }
 181     return 0;
 182 }
 183
 184 //==========================================================================
 185 // Display and clear the activity indicator.
 186
 187 static char indicator[] = {'-', '\\', '|', '/', '-', '\\', '|', '/', '\0'};
 188
 189 // To prevent a ridiculously fast-spinning indicator,
 190 // ensure a minimum of 1/9 sec between animation frames.
 191 #define MIN_TICKS 2
 192
 193 void
 194 spinActivityIndicator( void )
 195 {
 196     static unsigned long lastTickTime = 0;
 197     unsigned long        currentTickTime = time18();
 198     static char          string[3] = {'\0', '\b', '\0'};
 199
 200     if (currentTickTime < lastTickTime + MIN_TICKS)
 201         return;
 202     else
 203         lastTickTime = currentTickTime;
 204
 205     if ( currentMode() == TEXT_MODE )
 206     {
 207         string[0] = indicator[currentIndicator];
 208         printf(string);
 209         if (indicator[++currentIndicator] == 0)
 210             currentIndicator = 0;
 211     }
 212 }
 213
 214 void
 215 clearActivityIndicator( void )
 216 {
 217     if ( currentMode() == TEXT_MODE )
 218     {
 219         printf(" \b");
 220     }
 221 }