Travis Geiselbrecht | 99b2d1d | 2010-05-21 22:57:18 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2008-2010 Travis Geiselbrecht |
| 3 | * |
| 4 | * Permission is hereby granted, free of charge, to any person obtaining |
| 5 | * a copy of this software and associated documentation files |
| 6 | * (the "Software"), to deal in the Software without restriction, |
| 7 | * including without limitation the rights to use, copy, modify, merge, |
| 8 | * publish, distribute, sublicense, and/or sell copies of the Software, |
| 9 | * and to permit persons to whom the Software is furnished to do so, |
| 10 | * subject to the following conditions: |
| 11 | * |
| 12 | * The above copyright notice and this permission notice shall be |
| 13 | * included in all copies or substantial portions of the Software. |
| 14 | * |
| 15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| 16 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| 17 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. |
| 18 | * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY |
| 19 | * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, |
| 20 | * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE |
| 21 | * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
| 22 | */ |
| 23 | |
| 24 | /** |
| 25 | * @file |
| 26 | * @brief Manage graphics console |
| 27 | * |
| 28 | * This file contains functions to provide stdout to the graphics console. |
| 29 | * |
| 30 | * @ingroup graphics |
| 31 | */ |
| 32 | |
| 33 | #include <debug.h> |
| 34 | #include <lib/gfx.h> |
| 35 | #include <lib/gfxconsole.h> |
| 36 | #include <lib/font.h> |
| 37 | #include <dev/display.h> |
| 38 | |
| 39 | /** @addtogroup graphics |
| 40 | * @{ |
| 41 | */ |
| 42 | |
| 43 | /** |
| 44 | * @brief Represent state of graphics console |
| 45 | */ |
| 46 | static struct { |
| 47 | gfx_surface *surface; |
| 48 | uint rows, columns; |
| 49 | uint extray; // extra pixels left over if the rows doesn't fit precisely |
| 50 | |
| 51 | uint x, y; |
| 52 | |
| 53 | uint32_t front_color; |
| 54 | uint32_t back_color; |
| 55 | } gfxconsole; |
| 56 | |
| 57 | static void gfxconsole_putc(char c) |
| 58 | { |
| 59 | static enum { NORMAL, ESCAPE } state = NORMAL; |
| 60 | static uint32_t p_num = 0; |
| 61 | |
| 62 | switch (state) { |
| 63 | case NORMAL: |
| 64 | { |
| 65 | if(c == '\n' || c == '\r') { |
| 66 | gfxconsole.x = 0; |
| 67 | gfxconsole.y++; |
| 68 | } else if (c == 0x1b) { |
| 69 | p_num = 0; |
| 70 | state = ESCAPE; |
| 71 | } else { |
| 72 | font_draw_char(gfxconsole.surface, c, gfxconsole.x * FONT_X, gfxconsole.y * FONT_Y, gfxconsole.front_color); |
| 73 | gfxconsole.x++; |
| 74 | } |
| 75 | break; |
| 76 | } |
| 77 | |
| 78 | case ESCAPE: |
| 79 | { |
| 80 | if (c >= '0' && c <= '9') { |
| 81 | p_num = (p_num * 10) + (c - '0'); |
| 82 | } else if (c == 'D') { |
| 83 | if (p_num <= gfxconsole.x) |
| 84 | gfxconsole.x -= p_num; |
| 85 | state = NORMAL; |
| 86 | } else if (c == '[') { |
| 87 | // eat this character |
| 88 | } else { |
| 89 | font_draw_char(gfxconsole.surface, c, gfxconsole.x * FONT_X, gfxconsole.y * FONT_Y, gfxconsole.front_color); |
| 90 | gfxconsole.x++; |
| 91 | state = NORMAL; |
| 92 | } |
| 93 | break; |
| 94 | } |
| 95 | } |
| 96 | |
| 97 | if(gfxconsole.x >= gfxconsole.columns) { |
| 98 | gfxconsole.x = 0; |
| 99 | gfxconsole.y++; |
| 100 | } |
| 101 | if(gfxconsole.y >= gfxconsole.rows) { |
| 102 | // scroll up |
| 103 | gfx_copyrect(gfxconsole.surface, 0, FONT_Y, gfxconsole.surface->width, gfxconsole.surface->height - FONT_Y - gfxconsole.extray, 0, 0); |
| 104 | gfxconsole.y--; |
| 105 | gfx_fillrect(gfxconsole.surface, 0, gfxconsole.surface->height - FONT_Y - gfxconsole.extray, gfxconsole.surface->width, FONT_Y, gfxconsole.back_color); |
| 106 | gfx_flush(gfxconsole.surface); |
| 107 | } |
| 108 | } |
| 109 | |
| 110 | /** |
| 111 | * @brief Initialize graphics console on given drawing surface. |
| 112 | * |
| 113 | * The graphics console subsystem is initialized, and registered as |
| 114 | * an output device for debug output. |
| 115 | */ |
| 116 | void gfxconsole_start(gfx_surface *surface) |
| 117 | { |
| 118 | DEBUG_ASSERT(gfxconsole.surface == NULL); |
| 119 | |
| 120 | // set up the surface |
| 121 | gfxconsole.surface = surface; |
| 122 | |
| 123 | // calculate how many rows/columns we have |
| 124 | gfxconsole.rows = surface->height / FONT_Y; |
| 125 | gfxconsole.columns = surface->width / FONT_X; |
| 126 | gfxconsole.extray = surface->height - (gfxconsole.rows * FONT_Y); |
| 127 | |
| 128 | dprintf(SPEW, "gfxconsole: rows %d, columns %d, extray %d\n", gfxconsole.rows, gfxconsole.columns, gfxconsole.extray); |
| 129 | |
| 130 | // start in the upper left |
| 131 | gfxconsole.x = 0; |
| 132 | gfxconsole.y = 0; |
| 133 | |
| 134 | // colors are white and black for now |
| 135 | gfxconsole.front_color = 0xffffffff; |
| 136 | gfxconsole.back_color = 0; |
| 137 | |
| 138 | // register for debug callbacks |
| 139 | register_debug_output(&gfxconsole_putc); |
| 140 | } |
| 141 | |
| 142 | /** |
| 143 | * @brief Initialize graphics console on default display |
| 144 | */ |
| 145 | void gfxconsole_start_on_display(void) |
| 146 | { |
| 147 | static bool started = false; |
| 148 | |
| 149 | if (started) |
| 150 | return; |
| 151 | |
| 152 | /* pop up the console */ |
| 153 | struct display_info info; |
| 154 | display_get_info(&info); |
| 155 | gfx_surface *s = gfx_create_surface_from_display(&info); |
| 156 | gfxconsole_start(s); |
| 157 | started = true; |
| 158 | } |
| 159 | |