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annotate test/threadwin.c @ 1712:931d111e737a SDL-1.3

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Started framework for Windows video driver
author Sam Lantinga <slouken@libsdl.org>
date Mon, 26 Jun 2006 13:56:56 +0000
parents 4da1ee79c9af
children 6c63fc2bd986
rev   line source
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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
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19 quit(int rc)
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20 {
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21 SDL_Quit();
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22 exit(rc);
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23 }
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24
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25 SDL_Surface *
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26 LoadIconSurface(char *file, Uint8 ** maskp)
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27 {
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28 SDL_Surface *icon;
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29 Uint8 *pixels;
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30 Uint8 *mask;
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31 int mlen, i;
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32
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33 *maskp = NULL;
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34
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35 /* Load the icon surface */
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36 icon = SDL_LoadBMP(file);
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37 if (icon == NULL) {
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38 fprintf(stderr, "Couldn't load %s: %s\n", file, SDL_GetError());
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39 return (NULL);
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40 }
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41
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42 /* Check width and height */
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43 if ((icon->w % 8) != 0) {
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44 fprintf(stderr, "Icon width must be a multiple of 8!\n");
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45 SDL_FreeSurface(icon);
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46 return (NULL);
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47 }
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48 if (icon->format->palette == NULL) {
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49 fprintf(stderr, "Icon must have a palette!\n");
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50 SDL_FreeSurface(icon);
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51 return (NULL);
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52 }
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53
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54 /* Set the colorkey */
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55 SDL_SetColorKey(icon, SDL_SRCCOLORKEY, *((Uint8 *) icon->pixels));
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57 /* Create the mask */
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58 pixels = (Uint8 *) icon->pixels;
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59 printf("Transparent pixel: (%d,%d,%d)\n",
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60 icon->format->palette->colors[*pixels].r,
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61 icon->format->palette->colors[*pixels].g,
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62 icon->format->palette->colors[*pixels].b);
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63 mlen = icon->w * icon->h;
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64 mask = (Uint8 *) malloc(mlen / 8);
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65 if (mask == NULL) {
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66 fprintf(stderr, "Out of memory!\n");
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67 SDL_FreeSurface(icon);
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68 return (NULL);
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69 }
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70 memset(mask, 0, mlen / 8);
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71 for (i = 0; i < mlen;) {
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72 if (pixels[i] != *pixels)
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73 mask[i / 8] |= 0x01;
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74 ++i;
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75 if ((i % 8) != 0)
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76 mask[i / 8] <<= 1;
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77 }
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78 *maskp = mask;
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79 return (icon);
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80 }
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81
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82 int SDLCALL
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83 FilterEvents(SDL_Event * event)
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84 {
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85 static int reallyquit = 0;
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86
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87 switch (event->type) {
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88
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89 case SDL_ACTIVEEVENT:
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90 /* See what happened */
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91 printf("App %s ", event->active.gain ? "gained" : "lost");
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92 if (event->active.state & SDL_APPACTIVE)
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93 printf("active ");
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94 if (event->active.state & SDL_APPMOUSEFOCUS)
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95 printf("mouse ");
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96 if (event->active.state & SDL_APPINPUTFOCUS)
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97 printf("input ");
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98 printf("focus\n");
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99
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100 /* See if we are iconified or restored */
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101 if (event->active.state & SDL_APPACTIVE) {
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102 printf("App has been %s\n",
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103 event->active.gain ? "restored" : "iconified");
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104 }
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105 return (0);
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106
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107 /* This is important! Queue it if we want to quit. */
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108 case SDL_QUIT:
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109 if (!reallyquit) {
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110 reallyquit = 1;
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111 printf("Quit requested\n");
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112 return (0);
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113 }
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114 printf("Quit demanded\n");
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115 return (1);
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116
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117 /* Mouse and keyboard events go to threads */
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118 case SDL_MOUSEMOTION:
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119 case SDL_MOUSEBUTTONDOWN:
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120 case SDL_MOUSEBUTTONUP:
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121 case SDL_KEYDOWN:
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122 case SDL_KEYUP:
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123 return (1);
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124
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125 /* Drop all other events */
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126 default:
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127 return (0);
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128 }
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129 }
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130
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131 int SDLCALL
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132 HandleMouse(void *unused)
0
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133 {
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134 SDL_Event events[10];
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135 int i, found;
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136 Uint32 mask;
0
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137
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138 /* Handle mouse events here */
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139 mask =
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140 (SDL_MOUSEMOTIONMASK | SDL_MOUSEBUTTONDOWNMASK |
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141 SDL_MOUSEBUTTONUPMASK);
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142 while (!done) {
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143 found = SDL_PeepEvents(events, 10, SDL_GETEVENT, mask);
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144 for (i = 0; i < found; ++i) {
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145 switch (events[i].type) {
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146 /* We want to toggle visibility on buttonpress */
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147 case SDL_MOUSEBUTTONDOWN:
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148 case SDL_MOUSEBUTTONUP:
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149 if (events[i].button.state == SDL_PRESSED) {
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150 visible = !visible;
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151 SDL_ShowCursor(visible);
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152 }
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153 printf("Mouse button %d has been %s\n",
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154 events[i].button.button,
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155 (events[i].button.state == SDL_PRESSED) ?
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156 "pressed" : "released");
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157 break;
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158 /* Show relative mouse motion */
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159 case SDL_MOUSEMOTION:
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160 printf("Mouse relative motion: {%d,%d}\n",
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161 events[i].motion.xrel, events[i].motion.yrel);
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162 break;
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163 }
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164 }
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165 /* Give up some CPU to allow events to arrive */
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166 SDL_Delay(20);
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167 }
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168 return (0);
0
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169 }
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170
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171 int SDLCALL
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172 HandleKeyboard(void *unused)
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173 {
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174 SDL_Event events[10];
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175 int i, found;
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176 Uint32 mask;
0
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177
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178 /* Handle mouse events here */
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179 mask = (SDL_KEYDOWNMASK | SDL_KEYUPMASK);
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180 while (!done) {
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181 found = SDL_PeepEvents(events, 10, SDL_GETEVENT, mask);
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182 for (i = 0; i < found; ++i) {
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183 switch (events[i].type) {
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184 /* We want to toggle visibility on buttonpress */
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185 case SDL_KEYDOWN:
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186 case SDL_KEYUP:
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187 printf("Key '%c' has been %s\n",
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188 events[i].key.keysym.unicode,
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189 (events[i].key.state == SDL_PRESSED) ?
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190 "pressed" : "released");
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191
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192 /* Allow hitting <ESC> to quit the app */
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193 if (events[i].key.keysym.sym == SDLK_ESCAPE) {
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194 done = 1;
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195 }
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196
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197 /* skip events now that aren't KEYUPs... */
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198 if (events[i].key.state == SDL_PRESSED)
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199 break;
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200
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201 if (events[i].key.keysym.sym == SDLK_f) {
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202 int rc = 0;
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203 printf("attempting to toggle fullscreen...\n");
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204 rc = SDL_WM_ToggleFullScreen(SDL_GetVideoSurface());
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205 printf("SDL_WM_ToggleFullScreen returned %d.\n", rc);
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206 }
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207
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208 if (events[i].key.keysym.sym == SDLK_g) {
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209 SDL_GrabMode m;
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210 m = SDL_WM_GrabInput(SDL_GRAB_QUERY) ==
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211 SDL_GRAB_ON ? SDL_GRAB_OFF : SDL_GRAB_ON;
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212 printf
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213 ("attempting to toggle input grab to %s...\n",
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214 m == SDL_GRAB_ON ? "ON" : "OFF");
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215 SDL_WM_GrabInput(m);
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216 printf("attempt finished.\n");
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217 }
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218
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219 break;
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220 }
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221 }
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222 /* Give up some CPU to allow events to arrive */
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223 SDL_Delay(20);
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224 }
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225 return (0);
0
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226 }
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227
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228 int
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229 main(int argc, char *argv[])
0
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230 {
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231 SDL_Surface *screen;
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232 SDL_Surface *icon;
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233 Uint8 *icon_mask;
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234 int i, parsed;
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235 Uint8 *buffer;
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236 SDL_Color palette[256];
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237 Uint32 init_flags;
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238 Uint8 video_bpp;
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239 Uint32 video_flags;
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240 SDL_Thread *mouse_thread;
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241 SDL_Thread *keybd_thread;
0
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242
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243 /* Set the options, based on command line arguments */
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244 init_flags = SDL_INIT_VIDEO;
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245 video_bpp = 8;
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246 video_flags = SDL_SWSURFACE;
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247 parsed = 1;
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248 while (parsed) {
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249 /* If the threaded option is enabled, and the SDL library hasn't
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250 been compiled with threaded events enabled, then the mouse and
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251 keyboard won't respond.
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252 */
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253 if ((argc >= 2) && (strcmp(argv[1], "-threaded") == 0)) {
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254 init_flags |= SDL_INIT_EVENTTHREAD;
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255 argc -= 1;
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256 argv += 1;
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257 printf("Running with threaded events\n");
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258 } else if ((argc >= 2) && (strcmp(argv[1], "-fullscreen") == 0)) {
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259 video_flags |= SDL_FULLSCREEN;
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260 argc -= 1;
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261 argv += 1;
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262 } else if ((argc >= 3) && (strcmp(argv[1], "-bpp") == 0)) {
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263 video_bpp = atoi(argv[2]);
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264 argc -= 2;
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265 argv += 2;
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266 } else {
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267 parsed = 0;
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268 }
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269 }
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270
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271 /* Initialize SDL with the requested flags */
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272 if (SDL_Init(init_flags) < 0) {
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273 fprintf(stderr, "Couldn't initialize SDL: %s\n", SDL_GetError());
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274 return (1);
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275 }
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276
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277 /* Set the icon -- this must be done before the first mode set */
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278 icon = LoadIconSurface("icon.bmp", &icon_mask);
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279 if (icon != NULL) {
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280 SDL_WM_SetIcon(icon, icon_mask);
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281 }
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282 if (icon_mask != NULL)
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283 free(icon_mask);
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284
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285 /* Initialize the display */
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286 screen = SDL_SetVideoMode(640, 480, video_bpp, video_flags);
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287 if (screen == NULL) {
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288 fprintf(stderr, "Couldn't set 640x480x%d video mode: %s\n",
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289 video_bpp, SDL_GetError());
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290 quit(1);
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291 }
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292 printf("Running in %s mode\n", screen->flags & SDL_FULLSCREEN ?
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293 "fullscreen" : "windowed");
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294
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295 /* Enable printable characters */
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296 SDL_EnableUNICODE(1);
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297
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298 /* Set an event filter that discards everything but QUIT */
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299 SDL_SetEventFilter(FilterEvents);
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300
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301 /* Create the event handling threads */
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302 mouse_thread = SDL_CreateThread(HandleMouse, NULL);
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303 keybd_thread = SDL_CreateThread(HandleKeyboard, NULL);
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304
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305 /* Set the surface pixels and refresh! */
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306 for (i = 0; i < 256; ++i) {
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307 palette[i].r = 255 - i;
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308 palette[i].g = 255 - i;
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309 palette[i].b = 255 - i;
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310 }
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311 SDL_SetColors(screen, palette, 0, 256);
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312 if (SDL_LockSurface(screen) < 0) {
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313 fprintf(stderr, "Couldn't lock display surface: %s\n",
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314 SDL_GetError());
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315 quit(2);
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316 }
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317 buffer = (Uint8 *) screen->pixels;
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318 for (i = 0; i < screen->h; ++i) {
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319 memset(buffer, (i * 255) / screen->h,
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320 screen->w * screen->format->BytesPerPixel);
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321 buffer += screen->pitch;
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322 }
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323 SDL_UnlockSurface(screen);
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324 SDL_UpdateRect(screen, 0, 0, 0, 0);
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325
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326 /* Loop, waiting for QUIT */
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327 while (!done) {
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328 if (!(init_flags & SDL_INIT_EVENTTHREAD)) {
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329 SDL_PumpEvents(); /* Needed when event thread is off */
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330 }
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331 if (SDL_PeepEvents(NULL, 0, SDL_PEEKEVENT, SDL_QUITMASK)) {
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332 done = 1;
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333 }
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334 /* Give up some CPU so the events can accumulate */
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335 SDL_Delay(20);
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336 }
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337 SDL_WaitThread(mouse_thread, NULL);
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338 SDL_WaitThread(keybd_thread, NULL);
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339 SDL_Quit();
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340 return (0);
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341 }