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1 |
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2 /* Test out the multi-threaded event handling functions */ |
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3 |
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4 #include <stdlib.h> |
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5 #include <stdio.h> |
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6 #include <string.h> |
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7 |
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8 #include "SDL.h" |
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9 #include "SDL_thread.h" |
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10 |
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11 /* Are we done yet? */ |
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12 static int done = 0; |
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13 |
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14 /* Is the cursor visible? */ |
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15 static int visible = 1; |
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16 |
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17 /* Call this instead of exit(), so we can clean up SDL: atexit() is evil. */ |
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18 static void quit(int rc) |
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19 { |
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20 SDL_Quit(); |
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21 exit(rc); |
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22 } |
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23 |
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24 SDL_Surface *LoadIconSurface(char *file, Uint8 **maskp) |
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25 { |
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26 SDL_Surface *icon; |
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27 Uint8 *pixels; |
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28 Uint8 *mask; |
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29 int mlen, i; |
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30 |
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31 *maskp = NULL; |
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32 |
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33 /* Load the icon surface */ |
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34 icon = SDL_LoadBMP(file); |
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35 if ( icon == NULL ) { |
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36 fprintf(stderr, "Couldn't load %s: %s\n", file, SDL_GetError()); |
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37 return(NULL); |
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38 } |
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39 |
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40 /* Check width and height */ |
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41 if ( (icon->w%8) != 0 ) { |
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42 fprintf(stderr, "Icon width must be a multiple of 8!\n"); |
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43 SDL_FreeSurface(icon); |
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44 return(NULL); |
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45 } |
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46 if ( icon->format->palette == NULL ) { |
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47 fprintf(stderr, "Icon must have a palette!\n"); |
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48 SDL_FreeSurface(icon); |
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49 return(NULL); |
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50 } |
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51 |
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52 /* Set the colorkey */ |
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53 SDL_SetColorKey(icon, SDL_SRCCOLORKEY, *((Uint8 *)icon->pixels)); |
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54 |
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55 /* Create the mask */ |
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56 pixels = (Uint8 *)icon->pixels; |
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57 printf("Transparent pixel: (%d,%d,%d)\n", |
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58 icon->format->palette->colors[*pixels].r, |
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59 icon->format->palette->colors[*pixels].g, |
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60 icon->format->palette->colors[*pixels].b); |
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61 mlen = icon->w*icon->h; |
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62 mask = (Uint8 *)malloc(mlen/8); |
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63 if ( mask == NULL ) { |
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64 fprintf(stderr, "Out of memory!\n"); |
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65 SDL_FreeSurface(icon); |
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66 return(NULL); |
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67 } |
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68 memset(mask, 0, mlen/8); |
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69 for ( i=0; i<mlen; ) { |
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70 if ( pixels[i] != *pixels ) |
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71 mask[i/8] |= 0x01; |
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72 ++i; |
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73 if ( (i%8) != 0 ) |
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74 mask[i/8] <<= 1; |
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75 } |
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76 *maskp = mask; |
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77 return(icon); |
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78 } |
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79 |
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80 int SDLCALL FilterEvents(const SDL_Event *event) |
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81 { |
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82 static int reallyquit = 0; |
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83 |
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84 switch (event->type) { |
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85 |
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86 case SDL_ACTIVEEVENT: |
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87 /* See what happened */ |
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88 printf("App %s ", |
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89 event->active.gain ? "gained" : "lost"); |
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90 if ( event->active.state & SDL_APPACTIVE ) |
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91 printf("active "); |
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92 if ( event->active.state & SDL_APPMOUSEFOCUS ) |
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93 printf("mouse "); |
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94 if ( event->active.state & SDL_APPINPUTFOCUS ) |
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95 printf("input "); |
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96 printf("focus\n"); |
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97 |
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98 /* See if we are iconified or restored */ |
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99 if ( event->active.state & SDL_APPACTIVE ) { |
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100 printf("App has been %s\n", |
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101 event->active.gain ? |
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102 "restored" : "iconified"); |
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103 } |
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104 return(0); |
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105 |
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106 /* This is important! Queue it if we want to quit. */ |
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107 case SDL_QUIT: |
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108 if ( ! reallyquit ) { |
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109 reallyquit = 1; |
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110 printf("Quit requested\n"); |
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111 return(0); |
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112 } |
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113 printf("Quit demanded\n"); |
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114 return(1); |
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115 |
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116 /* Mouse and keyboard events go to threads */ |
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117 case SDL_MOUSEMOTION: |
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118 case SDL_MOUSEBUTTONDOWN: |
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119 case SDL_MOUSEBUTTONUP: |
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120 case SDL_KEYDOWN: |
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121 case SDL_KEYUP: |
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122 return(1); |
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123 |
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124 /* Drop all other events */ |
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125 default: |
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126 return(0); |
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127 } |
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128 } |
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129 |
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130 int SDLCALL HandleMouse(void *unused) |
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131 { |
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132 SDL_Event events[10]; |
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133 int i, found; |
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134 Uint32 mask; |
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135 |
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136 /* Handle mouse events here */ |
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137 mask = (SDL_MOUSEMOTIONMASK|SDL_MOUSEBUTTONDOWNMASK|SDL_MOUSEBUTTONUPMASK); |
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138 while ( ! done ) { |
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139 found = SDL_PeepEvents(events, 10, SDL_GETEVENT, mask); |
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140 for ( i=0; i<found; ++i ) { |
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141 switch(events[i].type) { |
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142 /* We want to toggle visibility on buttonpress */ |
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143 case SDL_MOUSEBUTTONDOWN: |
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144 case SDL_MOUSEBUTTONUP: |
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145 if ( events[i].button.state == SDL_PRESSED ) { |
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146 visible = !visible; |
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147 SDL_ShowCursor(visible); |
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148 } |
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149 printf("Mouse button %d has been %s\n", |
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150 events[i].button.button, |
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151 (events[i].button.state == SDL_PRESSED) ? |
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152 "pressed" : "released"); |
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153 break; |
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154 /* Show relative mouse motion */ |
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155 case SDL_MOUSEMOTION: |
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156 printf("Mouse relative motion: {%d,%d}\n", |
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157 events[i].motion.xrel, events[i].motion.yrel); |
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158 break; |
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159 } |
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160 } |
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161 /* Give up some CPU to allow events to arrive */ |
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162 SDL_Delay(20); |
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163 } |
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164 return(0); |
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165 } |
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166 |
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167 int SDLCALL HandleKeyboard(void *unused) |
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168 { |
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169 SDL_Event events[10]; |
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170 int i, found; |
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171 Uint32 mask; |
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172 |
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173 /* Handle mouse events here */ |
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174 mask = (SDL_KEYDOWNMASK|SDL_KEYUPMASK); |
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175 while ( ! done ) { |
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176 found = SDL_PeepEvents(events, 10, SDL_GETEVENT, mask); |
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177 for ( i=0; i<found; ++i ) { |
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178 switch(events[i].type) { |
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179 /* We want to toggle visibility on buttonpress */ |
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180 case SDL_KEYDOWN: |
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181 case SDL_KEYUP: |
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182 printf("Key '%c' (keysym==%d) has been %s\n", |
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183 events[i].key.keysym.unicode, |
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184 (int) events[i].key.keysym.sym, |
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185 (events[i].key.state == SDL_PRESSED) ? |
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186 "pressed" : "released"); |
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187 |
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188 /* Allow hitting <ESC> to quit the app */ |
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189 if ( events[i].key.keysym.sym == SDLK_ESCAPE ) { |
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190 done = 1; |
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191 } |
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192 |
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193 /* skip events now that aren't KEYUPs... */ |
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194 if (events[i].key.state == SDL_PRESSED) |
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195 break; |
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196 |
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197 if ( events[i].key.keysym.sym == SDLK_f ) { |
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198 int rc = 0; |
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199 printf("attempting to toggle fullscreen...\n"); |
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200 rc = SDL_WM_ToggleFullScreen(SDL_GetVideoSurface()); |
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201 printf("SDL_WM_ToggleFullScreen returned %d.\n", rc); |
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202 } |
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203 |
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204 if ( events[i].key.keysym.sym == SDLK_g ) { |
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205 SDL_GrabMode m; |
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206 m = SDL_WM_GrabInput(SDL_GRAB_QUERY) == SDL_GRAB_ON ? |
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207 SDL_GRAB_OFF : SDL_GRAB_ON; |
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208 printf("attempting to toggle input grab to %s...\n", |
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209 m == SDL_GRAB_ON ? "ON" : "OFF"); |
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210 SDL_WM_GrabInput(m); |
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211 printf("attempt finished.\n"); |
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212 } |
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213 |
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214 break; |
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215 } |
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216 } |
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217 /* Give up some CPU to allow events to arrive */ |
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218 SDL_Delay(20); |
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219 } |
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220 return(0); |
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221 } |
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222 |
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223 int main(int argc, char *argv[]) |
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224 { |
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225 SDL_Surface *screen; |
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226 SDL_Surface *icon; |
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227 Uint8 *icon_mask; |
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228 int i, parsed; |
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229 Uint8 *buffer; |
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230 SDL_Color palette[256]; |
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231 Uint32 init_flags; |
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232 Uint8 video_bpp; |
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233 Uint32 video_flags; |
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234 SDL_Thread *mouse_thread; |
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235 SDL_Thread *keybd_thread; |
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236 |
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237 /* Set the options, based on command line arguments */ |
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238 init_flags = SDL_INIT_VIDEO; |
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239 video_bpp = 8; |
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240 video_flags = SDL_SWSURFACE; |
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241 parsed = 1; |
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242 while ( parsed ) { |
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243 /* If the threaded option is enabled, and the SDL library hasn't |
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244 been compiled with threaded events enabled, then the mouse and |
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245 keyboard won't respond. |
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246 */ |
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247 if ( (argc >= 2) && (strcmp(argv[1], "-threaded") == 0) ) { |
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248 init_flags |= SDL_INIT_EVENTTHREAD; |
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249 argc -= 1; |
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250 argv += 1; |
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251 printf("Running with threaded events\n"); |
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252 } else |
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253 if ( (argc >= 2) && (strcmp(argv[1], "-fullscreen") == 0) ) { |
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254 video_flags |= SDL_FULLSCREEN; |
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255 argc -= 1; |
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256 argv += 1; |
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257 } else |
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258 if ( (argc >= 3) && (strcmp(argv[1], "-bpp") == 0) ) { |
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259 video_bpp = atoi(argv[2]); |
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260 argc -= 2; |
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261 argv += 2; |
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262 } else { |
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263 parsed = 0; |
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264 } |
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265 } |
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266 |
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267 /* Initialize SDL with the requested flags */ |
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268 if ( SDL_Init(init_flags) < 0 ) { |
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269 fprintf(stderr, |
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270 "Couldn't initialize SDL: %s\n", SDL_GetError()); |
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271 return(1); |
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272 } |
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273 |
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274 /* Set the icon -- this must be done before the first mode set */ |
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275 icon = LoadIconSurface("icon.bmp", &icon_mask); |
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276 if ( icon != NULL ) { |
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277 SDL_WM_SetIcon(icon, icon_mask); |
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278 } |
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279 if ( icon_mask != NULL ) |
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280 free(icon_mask); |
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281 |
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282 /* Initialize the display */ |
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283 screen = SDL_SetVideoMode(640, 480, video_bpp, video_flags); |
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284 if ( screen == NULL ) { |
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285 fprintf(stderr, "Couldn't set 640x480x%d video mode: %s\n", |
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286 video_bpp, SDL_GetError()); |
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287 quit(1); |
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288 } |
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289 printf("Running in %s mode\n", screen->flags & SDL_FULLSCREEN ? |
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290 "fullscreen" : "windowed"); |
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291 |
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292 /* Enable printable characters */ |
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293 SDL_EnableUNICODE(1); |
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294 |
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295 /* Set an event filter that discards everything but QUIT */ |
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296 SDL_SetEventFilter(FilterEvents); |
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297 |
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298 /* Create the event handling threads */ |
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299 mouse_thread = SDL_CreateThread(HandleMouse, NULL); |
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300 keybd_thread = SDL_CreateThread(HandleKeyboard, NULL); |
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301 |
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302 /* Set the surface pixels and refresh! */ |
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303 for ( i=0; i<256; ++i ) { |
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304 palette[i].r = 255-i; |
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305 palette[i].g = 255-i; |
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306 palette[i].b = 255-i; |
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307 } |
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308 SDL_SetColors(screen, palette, 0, 256); |
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309 if ( SDL_LockSurface(screen) < 0 ) { |
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310 fprintf(stderr, "Couldn't lock display surface: %s\n", |
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311 SDL_GetError()); |
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312 quit(2); |
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313 } |
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314 buffer = (Uint8 *)screen->pixels; |
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315 for ( i=0; i<screen->h; ++i ) { |
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316 memset(buffer,(i*255)/screen->h, |
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317 screen->w*screen->format->BytesPerPixel); |
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318 buffer += screen->pitch; |
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319 } |
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320 SDL_UnlockSurface(screen); |
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321 SDL_UpdateRect(screen, 0, 0, 0, 0); |
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322 |
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323 /* Loop, waiting for QUIT */ |
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324 while ( ! done ) { |
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325 if ( ! (init_flags & SDL_INIT_EVENTTHREAD) ) { |
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326 SDL_PumpEvents(); /* Needed when event thread is off */ |
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327 } |
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328 if ( SDL_PeepEvents(NULL, 0, SDL_PEEKEVENT, SDL_QUITMASK) ) { |
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329 done = 1; |
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330 } |
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331 /* Give up some CPU so the events can accumulate */ |
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332 SDL_Delay(20); |
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333 } |
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334 SDL_WaitThread(mouse_thread, NULL); |
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335 SDL_WaitThread(keybd_thread, NULL); |
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336 SDL_Quit(); |
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337 return(0); |
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338 } |