annotate test/graywin.c @ 937:1e6366bde299

Date: Tue, 27 Jul 2004 17:14:00 +0200 From: "Eckhard Stolberg" Subject: Controller names in SDL for Windows I'm working on an Atari 2600 emulator for different systems that uses the SDL. Some time ago someone created an adaptor that lets you use your old Atari controllers with your computer through the USB port. Some of the Atari controllers require special handling by the emulator, so it would be nice, if it would be possible to detect if any of the controllers connected to the computer is this adaptor. SDL would allow that with the SDL_JoystickName function, but unfortunately it doesn't work properly on Windows. On Linux and MacOSX this function returns the name of the controller, but on Windows you'll only get the name of the joystick driver. Most joysticks nowadays use the generic Microsoft driver, so they all return the same name. In an old MSDN article (http://msdn.microsoft.com/archive/default.asp?url=/archive/en-us/dnarinput/html/msdn_extdirect.asp) Microsoft describes how to read out the OEM controller names from the registry. I have implemented this for the SDL controller handler on Windows, and now reading the joystick name works properly there too.
author Sam Lantinga <slouken@libsdl.org>
date Sat, 21 Aug 2004 03:45:58 +0000
parents 609543e2b3a1
children d33645c36072
rev   line source
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1
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2 /* Simple program: Fill a colormap with gray and stripe it down the screen */
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3
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4 #include <stdio.h>
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5 #include <stdlib.h>
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6 #include <string.h>
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7 #include <time.h>
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8
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9 #include "SDL.h"
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10
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11 #ifdef TEST_VGA16 /* Define this if you want to test VGA 16-color video modes */
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12 #define NUM_COLORS 16
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13 #else
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14 #define NUM_COLORS 256
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15 #endif
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16
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17 /* Draw a randomly sized and colored box centered about (X,Y) */
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18 void DrawBox(SDL_Surface *screen, int X, int Y, int width, int height)
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19 {
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20 static unsigned int seeded = 0;
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21 SDL_Rect area;
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22 Uint32 color;
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23 Uint32 randc;
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24
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25 /* Seed the random number generator */
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26 if ( seeded == 0 ) {
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27 srand(time(NULL));
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28 seeded = 1;
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29 }
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30
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31 /* Get the bounds of the rectangle */
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32 area.w = (rand()%width);
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33 area.h = (rand()%height);
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34 area.x = X-(area.w/2);
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35 area.y = Y-(area.h/2);
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36 randc = (rand()%NUM_COLORS);
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37
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38 if (screen->format->BytesPerPixel==1)
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39 {
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40 color = randc;
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41 }
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42 else
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43 {
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44 color = SDL_MapRGB(screen->format, randc, randc, randc);
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45 }
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46
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47 /* Do it! */
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48 SDL_FillRect(screen, &area, color);
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49 if ( screen->flags & SDL_DOUBLEBUF ) {
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50 SDL_Flip(screen);
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51 } else {
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52 SDL_UpdateRects(screen, 1, &area);
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53 }
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54 }
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55
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56 void DrawBackground(SDL_Surface *screen)
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57 {
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58 int i, j, k;
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59 Uint8 *buffer;
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60 Uint16 *buffer16;
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61 Uint16 color;
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62 Uint8 gradient;
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63
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64 /* Set the surface pixels and refresh! */
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65 /* Use two loops in case the surface is double-buffered (both sides) */
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66
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67 for ( j=0; j<2; ++j ) {
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68 if ( SDL_LockSurface(screen) < 0 ) {
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69 fprintf(stderr, "Couldn't lock display surface: %s\n",
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70 SDL_GetError());
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71 return;
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72 }
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73 buffer = (Uint8 *)screen->pixels;
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74
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75 if (screen->format->BytesPerPixel!=2) {
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76 for ( i=0; i<screen->h; ++i ) {
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77 memset(buffer,(i*(NUM_COLORS-1))/screen->h, screen->w * screen->format->BytesPerPixel);
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78 buffer += screen->pitch;
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79 }
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80 }
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81 else
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82 {
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83 for ( i=0; i<screen->h; ++i ) {
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84 gradient=((i*(NUM_COLORS-1))/screen->h);
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85 color = SDL_MapRGB(screen->format, gradient, gradient, gradient);
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86 buffer16=(Uint16*)buffer;
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87 for (k=0; k<screen->w; k++)
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88 {
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89 *(buffer16+k)=color;
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90 }
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91 buffer += screen->pitch;
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92 }
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93 }
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94
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95 SDL_UnlockSurface(screen);
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96 if ( screen->flags & SDL_DOUBLEBUF ) {
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97 SDL_Flip(screen);
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98 } else {
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99 SDL_UpdateRect(screen, 0, 0, 0, 0);
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100 break;
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101 }
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102 }
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103 }
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104
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105 SDL_Surface *CreateScreen(Uint16 w, Uint16 h, Uint8 bpp, Uint32 flags)
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106 {
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107 SDL_Surface *screen;
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108 int i;
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109 SDL_Color palette[NUM_COLORS];
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110
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111 /* Set the video mode */
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112 screen = SDL_SetVideoMode(w, h, bpp, flags);
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113 if ( screen == NULL ) {
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114 fprintf(stderr, "Couldn't set display mode: %s\n",
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115 SDL_GetError());
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116 return(NULL);
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117 }
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118 fprintf(stderr, "Screen is in %s mode\n",
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119 (screen->flags & SDL_FULLSCREEN) ? "fullscreen" : "windowed");
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120
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121 if (bpp==8) {
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122 /* Set a gray colormap, reverse order from white to black */
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123 for ( i=0; i<NUM_COLORS; ++i ) {
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124 palette[i].r = (NUM_COLORS-1)-i * (256 / NUM_COLORS);
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125 palette[i].g = (NUM_COLORS-1)-i * (256 / NUM_COLORS);
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126 palette[i].b = (NUM_COLORS-1)-i * (256 / NUM_COLORS);
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127 }
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128 SDL_SetColors(screen, palette, 0, NUM_COLORS);
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129 }
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130
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131 return(screen);
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132 }
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133
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134 int main(int argc, char *argv[])
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135 {
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136 SDL_Surface *screen;
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137 Uint32 videoflags;
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138 int done;
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139 SDL_Event event;
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140 int width, height, bpp;
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141
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142 /* Initialize SDL */
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143 if ( SDL_Init(SDL_INIT_VIDEO) < 0 ) {
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144 fprintf(stderr, "Couldn't initialize SDL: %s\n",SDL_GetError());
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145 exit(1);
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146 }
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147
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148 /* See if we try to get a hardware colormap */
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149 width = 640;
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150 height = 480;
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151 bpp = 8;
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152 videoflags = SDL_SWSURFACE;
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153 while ( argc > 1 ) {
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154 --argc;
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155 if ( argv[argc-1] && (strcmp(argv[argc-1], "-width") == 0) ) {
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156 width = atoi(argv[argc]);
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157 --argc;
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158 } else
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159 if ( argv[argc-1] && (strcmp(argv[argc-1], "-height") == 0) ) {
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160 height = atoi(argv[argc]);
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161 --argc;
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162 } else
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163 if ( argv[argc-1] && (strcmp(argv[argc-1], "-bpp") == 0) ) {
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164 bpp = atoi(argv[argc]);
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165 --argc;
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166 } else
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167 if ( argv[argc] && (strcmp(argv[argc], "-hw") == 0) ) {
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168 videoflags |= SDL_HWSURFACE;
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169 } else
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170 if ( argv[argc] && (strcmp(argv[argc], "-hwpalette") == 0) ) {
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171 videoflags |= SDL_HWPALETTE;
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172 } else
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173 if ( argv[argc] && (strcmp(argv[argc], "-flip") == 0) ) {
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174 videoflags |= SDL_DOUBLEBUF;
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175 } else
0
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176 if ( argv[argc] && (strcmp(argv[argc], "-noframe") == 0) ) {
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177 videoflags |= SDL_NOFRAME;
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178 } else
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179 if ( argv[argc] && (strcmp(argv[argc], "-fullscreen") == 0) ) {
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180 videoflags |= SDL_FULLSCREEN;
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181 } else {
538
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182 fprintf(stderr, "Usage: %s [-width] [-height] [-bpp] [-hw] [-hwpalette] [-flip] [-noframe] [-fullscreen]\n",
0
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183 argv[0]);
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184 exit(1);
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185 }
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186 }
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187
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188 /* Set a video mode */
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189 screen = CreateScreen(width, height, bpp, videoflags);
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190 if ( screen == NULL ) {
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191 exit(2);
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192 }
691
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193
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194 DrawBackground(screen);
0
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195
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196 /* Wait for a keystroke */
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197 done = 0;
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198 while ( !done && SDL_WaitEvent(&event) ) {
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199 switch (event.type) {
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200 case SDL_MOUSEBUTTONDOWN:
380
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201 DrawBox(screen, event.button.x, event.button.y, width, height);
0
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parents:
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202 break;
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203 case SDL_KEYDOWN:
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204 /* Ignore ALT-TAB for windows */
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205 if ( (event.key.keysym.sym == SDLK_LALT) ||
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206 (event.key.keysym.sym == SDLK_TAB) ) {
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207 break;
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208 }
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209 /* Center the mouse on <SPACE> */
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210 if ( event.key.keysym.sym == SDLK_SPACE ) {
380
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parents: 0
diff changeset
211 SDL_WarpMouse(width/2, height/2);
0
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diff changeset
212 break;
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diff changeset
213 }
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214 /* Toggle fullscreen mode on <RETURN> */
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diff changeset
215 if ( event.key.keysym.sym == SDLK_RETURN ) {
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diff changeset
216 videoflags ^= SDL_FULLSCREEN;
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217 screen = CreateScreen(
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diff changeset
218 screen->w, screen->h,
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diff changeset
219 screen->format->BitsPerPixel,
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diff changeset
220 videoflags);
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parents:
diff changeset
221 if ( screen == NULL ) {
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diff changeset
222 fprintf(stderr,
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diff changeset
223 "Couldn't toggle fullscreen mode\n");
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diff changeset
224 done = 1;
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diff changeset
225 }
691
609543e2b3a1 Date: Fri, 15 Aug 2003 09:13:59 +0300
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parents: 538
diff changeset
226 DrawBackground(screen);
0
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parents:
diff changeset
227 break;
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diff changeset
228 }
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diff changeset
229 /* Any other key quits the application... */
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230 case SDL_QUIT:
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diff changeset
231 done = 1;
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diff changeset
232 break;
691
609543e2b3a1 Date: Fri, 15 Aug 2003 09:13:59 +0300
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parents: 538
diff changeset
233 case SDL_VIDEOEXPOSE:
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diff changeset
234 DrawBackground(screen);
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diff changeset
235 break;
0
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parents:
diff changeset
236 default:
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parents:
diff changeset
237 break;
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parents:
diff changeset
238 }
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diff changeset
239 }
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diff changeset
240 SDL_Quit();
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diff changeset
241 return(0);
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parents:
diff changeset
242 }