Mercurial > sdl-ios-xcode
annotate test/graywin.c @ 889:eac8c69b5706
ate: Fri, 09 Apr 2004 20:07:10 +0200
From: Hibernatus
Subject: [SDL] BUG: changing video mode in opengl + windows
In WIN_GL_SetupWindow (SDL12/src/video/wincommon/SDL_wingl.c) you call
WIN_GL_ResetWindow when SetPixelFormat fails.
WIN_GL_ResetWindow cannot properly work in its current state, because there
are several things to update once you've created a new window. At least
DirectInput doesn't work anymore here (which is somewhat annoying for the
player :).
I think you can simply remove that function. Many games don't try to
recover from that exception, that's why the newest ATI drivers emulate 16
bpp display in 32 bpp mode so the error never occurs (but the games may run
much slower).
Having SDL_SetVideoMode return NULL would be better than actually setting
the video mode and losing focus, directinput and maybe directsound too. It
also made my previous drivers crash (when switching from 32 bpp windowed to
16 bpp fullscreen).
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Sun, 16 May 2004 18:02:48 +0000 |
| parents | 609543e2b3a1 |
| children | d33645c36072 |
| rev | line source |
|---|---|
| 0 | 1 |
| 2 /* Simple program: Fill a colormap with gray and stripe it down the screen */ | |
| 3 | |
| 4 #include <stdio.h> | |
| 5 #include <stdlib.h> | |
| 6 #include <string.h> | |
| 7 #include <time.h> | |
| 8 | |
| 9 #include "SDL.h" | |
| 10 | |
| 11 #ifdef TEST_VGA16 /* Define this if you want to test VGA 16-color video modes */ | |
| 12 #define NUM_COLORS 16 | |
| 13 #else | |
| 14 #define NUM_COLORS 256 | |
| 15 #endif | |
| 16 | |
| 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) |
| 0 | 19 { |
| 20 static unsigned int seeded = 0; | |
| 21 SDL_Rect area; | |
| 22 Uint32 color; | |
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23 Uint32 randc; |
| 0 | 24 |
| 25 /* Seed the random number generator */ | |
| 26 if ( seeded == 0 ) { | |
| 27 srand(time(NULL)); | |
| 28 seeded = 1; | |
| 29 } | |
| 30 | |
| 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); |
| 0 | 34 area.x = X-(area.w/2); |
| 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 } |
| 0 | 46 |
| 47 /* Do it! */ | |
| 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 } |
| 0 | 54 } |
| 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 |
| 0 | 105 SDL_Surface *CreateScreen(Uint16 w, Uint16 h, Uint8 bpp, Uint32 flags) |
| 106 { | |
| 107 SDL_Surface *screen; | |
| 108 int i; | |
| 109 SDL_Color palette[NUM_COLORS]; | |
| 110 | |
| 111 /* Set the video mode */ | |
| 112 screen = SDL_SetVideoMode(w, h, bpp, flags); | |
| 113 if ( screen == NULL ) { | |
| 114 fprintf(stderr, "Couldn't set display mode: %s\n", | |
| 115 SDL_GetError()); | |
| 116 return(NULL); | |
| 117 } | |
| 118 fprintf(stderr, "Screen is in %s mode\n", | |
| 119 (screen->flags & SDL_FULLSCREEN) ? "fullscreen" : "windowed"); | |
| 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); |
| 0 | 129 } |
| 130 | |
| 131 return(screen); | |
| 132 } | |
| 133 | |
| 134 int main(int argc, char *argv[]) | |
| 135 { | |
| 136 SDL_Surface *screen; | |
| 137 Uint32 videoflags; | |
| 138 int done; | |
| 139 SDL_Event event; | |
| 140 int width, height, bpp; | |
| 141 | |
| 142 /* Initialize SDL */ | |
| 143 if ( SDL_Init(SDL_INIT_VIDEO) < 0 ) { | |
| 144 fprintf(stderr, "Couldn't initialize SDL: %s\n",SDL_GetError()); | |
| 145 exit(1); | |
| 146 } | |
| 147 | |
| 148 /* See if we try to get a hardware colormap */ | |
| 149 width = 640; | |
| 150 height = 480; | |
| 151 bpp = 8; | |
| 152 videoflags = SDL_SWSURFACE; | |
| 153 while ( argc > 1 ) { | |
| 154 --argc; | |
| 155 if ( argv[argc-1] && (strcmp(argv[argc-1], "-width") == 0) ) { | |
| 156 width = atoi(argv[argc]); | |
| 157 --argc; | |
| 158 } else | |
| 159 if ( argv[argc-1] && (strcmp(argv[argc-1], "-height") == 0) ) { | |
| 160 height = atoi(argv[argc]); | |
| 161 --argc; | |
| 162 } else | |
| 163 if ( argv[argc-1] && (strcmp(argv[argc-1], "-bpp") == 0) ) { | |
| 164 bpp = atoi(argv[argc]); | |
| 165 --argc; | |
| 166 } else | |
| 167 if ( argv[argc] && (strcmp(argv[argc], "-hw") == 0) ) { | |
| 168 videoflags |= SDL_HWSURFACE; | |
| 169 } else | |
| 170 if ( argv[argc] && (strcmp(argv[argc], "-hwpalette") == 0) ) { | |
| 171 videoflags |= SDL_HWPALETTE; | |
| 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 | 176 if ( argv[argc] && (strcmp(argv[argc], "-noframe") == 0) ) { |
| 177 videoflags |= SDL_NOFRAME; | |
| 178 } else | |
| 179 if ( argv[argc] && (strcmp(argv[argc], "-fullscreen") == 0) ) { | |
| 180 videoflags |= SDL_FULLSCREEN; | |
| 181 } else { | |
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182 fprintf(stderr, "Usage: %s [-width] [-height] [-bpp] [-hw] [-hwpalette] [-flip] [-noframe] [-fullscreen]\n", |
| 0 | 183 argv[0]); |
| 184 exit(1); | |
| 185 } | |
| 186 } | |
| 187 | |
| 188 /* Set a video mode */ | |
| 189 screen = CreateScreen(width, height, bpp, videoflags); | |
| 190 if ( screen == NULL ) { | |
| 191 exit(2); | |
| 192 } | |
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193 |
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194 DrawBackground(screen); |
| 0 | 195 |
| 196 /* Wait for a keystroke */ | |
| 197 done = 0; | |
| 198 while ( !done && SDL_WaitEvent(&event) ) { | |
| 199 switch (event.type) { | |
| 200 case SDL_MOUSEBUTTONDOWN: | |
|
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201 DrawBox(screen, event.button.x, event.button.y, width, height); |
| 0 | 202 break; |
| 203 case SDL_KEYDOWN: | |
| 204 /* Ignore ALT-TAB for windows */ | |
| 205 if ( (event.key.keysym.sym == SDLK_LALT) || | |
| 206 (event.key.keysym.sym == SDLK_TAB) ) { | |
| 207 break; | |
| 208 } | |
| 209 /* Center the mouse on <SPACE> */ | |
| 210 if ( event.key.keysym.sym == SDLK_SPACE ) { | |
|
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211 SDL_WarpMouse(width/2, height/2); |
| 0 | 212 break; |
| 213 } | |
| 214 /* Toggle fullscreen mode on <RETURN> */ | |
| 215 if ( event.key.keysym.sym == SDLK_RETURN ) { | |
| 216 videoflags ^= SDL_FULLSCREEN; | |
| 217 screen = CreateScreen( | |
| 218 screen->w, screen->h, | |
| 219 screen->format->BitsPerPixel, | |
| 220 videoflags); | |
| 221 if ( screen == NULL ) { | |
| 222 fprintf(stderr, | |
| 223 "Couldn't toggle fullscreen mode\n"); | |
| 224 done = 1; | |
| 225 } | |
|
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226 DrawBackground(screen); |
| 0 | 227 break; |
| 228 } | |
| 229 /* Any other key quits the application... */ | |
| 230 case SDL_QUIT: | |
| 231 done = 1; | |
| 232 break; | |
|
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233 case SDL_VIDEOEXPOSE: |
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234 DrawBackground(screen); |
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Date: Fri, 15 Aug 2003 09:13:59 +0300
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235 break; |
| 0 | 236 default: |
| 237 break; | |
| 238 } | |
| 239 } | |
| 240 SDL_Quit(); | |
| 241 return(0); | |
| 242 } |