1 | /* |
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2 | * event event lister for libcaca |
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3 | * Copyright (c) 2004 Sam Hocevar <sam@zoy.org> |
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4 | * All Rights Reserved |
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5 | * |
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6 | * $Id: cacadraw.c 2821 2008-09-27 13:12:46Z sam $ |
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7 | * |
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8 | * This program is free software. It comes without any warranty, to |
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9 | * the extent permitted by applicable law. You can redistribute it |
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10 | * and/or modify it under the terms of the Do What The Fuck You Want |
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11 | * To Public License, Version 2, as published by Sam Hocevar. See |
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12 | * http://sam.zoy.org/wtfpl/COPYING for more details. |
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13 | */ |
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14 | |
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15 | #include "config.h" |
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16 | |
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17 | #if !defined(__KERNEL__) |
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18 | # include <stdio.h> |
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19 | # include <string.h> |
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20 | # include <stdlib.h> |
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21 | #endif |
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22 | |
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23 | #include "caca.h" |
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24 | |
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25 | static int refresh_screen(void); |
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26 | |
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27 | static caca_canvas_t *cv, *image; |
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28 | static caca_display_t *dp; |
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29 | static int x = 0, y = 0; |
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30 | |
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31 | int main(int argc, char **argv) |
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32 | { |
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33 | int refresh = 1, file = 1; |
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34 | unsigned int iw = 0, ih = 0; |
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35 | |
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36 | if(argc < 2) |
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37 | { |
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38 | fprintf(stderr, "%s: missing argument (filename).\n", argv[0]); |
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39 | return 1; |
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40 | } |
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41 | |
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42 | cv = caca_create_canvas(0, 0); |
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43 | if(!cv) |
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44 | return 1; |
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45 | dp = caca_create_display(cv); |
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46 | if(!dp) |
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47 | return 1; |
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48 | |
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49 | for(;;) |
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50 | { |
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51 | caca_event_t ev; |
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52 | unsigned int w, h; |
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53 | int dx = 0, dy = 0; |
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54 | |
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55 | if(!image) |
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56 | { |
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57 | image = caca_create_canvas(0, 0); |
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58 | if(caca_import_file(image, argv[file], "ansi") < 0) |
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59 | { |
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60 | fprintf(stderr, "%s: invalid file `%s'.\n", argv[0], argv[1]); |
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61 | return 1; |
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62 | } |
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63 | |
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64 | ih = caca_get_canvas_height(image); |
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65 | iw = caca_get_canvas_width(image); |
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66 | x = y = 0; |
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67 | |
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68 | caca_set_display_title(dp, argv[file]); |
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69 | |
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70 | refresh = 1; |
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71 | } |
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72 | |
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73 | if(refresh) |
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74 | { |
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75 | refresh_screen(); |
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76 | refresh = 0; |
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77 | } |
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78 | |
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79 | while(caca_get_event(dp, CACA_EVENT_ANY, &ev, -1)) |
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80 | { |
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81 | switch(caca_get_event_type(&ev)) |
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82 | { |
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83 | case CACA_EVENT_QUIT: |
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84 | goto quit; |
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85 | case CACA_EVENT_KEY_PRESS: |
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86 | switch(caca_get_event_key_ch(&ev)) |
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87 | { |
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88 | case CACA_KEY_LEFT: dx -= 2; break; |
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89 | case CACA_KEY_RIGHT: dx += 2; break; |
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90 | case CACA_KEY_UP: dy--; break; |
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91 | case CACA_KEY_DOWN: dy++; break; |
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92 | case CACA_KEY_PAGEUP: dy -= 12; break; |
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93 | case CACA_KEY_PAGEDOWN: dy += 12; break; |
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94 | case CACA_KEY_ESCAPE: |
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95 | case 'q': |
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96 | goto quit; |
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97 | case 'n': |
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98 | file = file + 1 < argc ? file + 1 : 1; |
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99 | caca_free_canvas(image); |
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100 | image = NULL; |
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101 | goto stopevents; |
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102 | case 'p': |
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103 | file = file > 1 ? file - 1 : argc - 1; |
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104 | caca_free_canvas(image); |
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105 | image = NULL; |
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106 | goto stopevents; |
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107 | default: |
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108 | break; |
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109 | } |
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110 | case CACA_EVENT_RESIZE: |
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111 | refresh = 1; |
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112 | goto stopevents; |
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113 | default: |
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114 | break; |
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115 | } |
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116 | } |
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117 | stopevents: |
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118 | |
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119 | w = caca_get_canvas_width(cv); |
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120 | h = caca_get_canvas_height(cv); |
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121 | |
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122 | if(dx | dy) |
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123 | { |
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124 | refresh = 1; |
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125 | x += dx; |
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126 | y += dy; |
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127 | |
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128 | if(x < 0) x = 0; else if(x + w > iw) x = iw > w ? iw - w : 0; |
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129 | if(y < 0) y = 0; else if(y + h > ih) y = ih > h ? ih - h : 0; |
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130 | } |
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131 | } |
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132 | quit: |
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133 | |
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134 | /* Clean up */ |
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135 | caca_free_display(dp); |
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136 | caca_free_canvas(image); |
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137 | caca_free_canvas(cv); |
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138 | |
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139 | return 0; |
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140 | } |
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141 | |
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142 | static int refresh_screen(void) |
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143 | { |
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144 | caca_set_color_ansi(cv, CACA_DEFAULT, CACA_DEFAULT); |
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145 | caca_clear_canvas(cv); |
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146 | |
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147 | caca_blit(cv, - x, - y, image, NULL); |
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148 | |
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149 | caca_refresh_display(dp); |
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150 | |
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151 | return 0; |
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152 | } |
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153 | |
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