Mercurial > sdl-ios-xcode
annotate test/testbitmap.c @ 1295:c3e36ac8a94c
Date: Sun, 6 Mar 2005 17:06:20 +0100
From: Per Inge Mathisen
Subject: [SDL] Fullscreen refresh on win32
Windows has a terrible default for fullscreen 3D apps of 60mhz refresh
rate. This can be fixed by the user by going into his driver's
control panel and forcing the refresh rate higher. However, this not a
very user friendly way about it, and in any case SDL contains no code
that could figure out this that condition has afflicted the user.
So the question is, could SDL fix this for the user? It is possible
under Windows to request a higher refresh rate. The danger is of
course that if the user has an old monitor, and you request a too high
refresh rate, the monitor could be damaged. However, I believe there
might be a way around that: Check before switching what refresh rate
the user's desktop runs in, and if our fullscreen dimensions are equal
or less than those of the desktop, use the higher refresh rate of 60
and the desktop rate.
Since most users run their desktops in the same or higher resolution
something sane, this should fix this problem for most users.
Thoughts?
An alternative is to add an SDL_GL_GetAttribute(SDL_GL_REFRESH_RATE)
option so that programs can bitch at their users at their own
convenience.
- Per
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Mon, 30 Jan 2006 06:56:10 +0000 |
| parents | be9c9c8f6d53 |
| children | 782fd950bd46 c121d94672cb |
| rev | line source |
|---|---|
| 0 | 1 |
| 2 /* Simple program: Test bitmap blits */ | |
| 3 | |
| 4 #include <stdio.h> | |
| 5 #include <stdlib.h> | |
| 6 #include <string.h> | |
| 7 | |
| 8 #include "SDL.h" | |
| 9 #include "picture.xbm" | |
| 10 | |
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11 /* Call this instead of exit(), so we can clean up SDL: atexit() is evil. */ |
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12 static void quit(int rc) |
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13 { |
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14 SDL_Quit(); |
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15 exit(rc); |
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16 } |
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Ryan C. Gordon <icculus@icculus.org>
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17 |
| 0 | 18 SDL_Surface *LoadXBM(SDL_Surface *screen, int w, int h, Uint8 *bits) |
| 19 { | |
| 20 SDL_Surface *bitmap; | |
| 21 Uint8 *line; | |
| 22 | |
| 23 /* Allocate the bitmap */ | |
| 24 bitmap = SDL_CreateRGBSurface(SDL_SWSURFACE, w, h, 1, 0, 0, 0, 0); | |
| 25 if ( bitmap == NULL ) { | |
| 26 fprintf(stderr, "Couldn't allocate bitmap: %s\n", | |
| 27 SDL_GetError()); | |
| 28 return(NULL); | |
| 29 } | |
| 30 | |
| 31 /* Copy the pixels */ | |
| 32 line = (Uint8 *)bitmap->pixels; | |
| 33 w = (w+7)/8; | |
| 34 while ( h-- ) { | |
| 35 memcpy(line, bits, w); | |
| 36 /* X11 Bitmap images have the bits reversed */ | |
| 37 { int i, j; Uint8 *buf, byte; | |
| 38 for ( buf=line, i=0; i<w; ++i, ++buf ) { | |
| 39 byte = *buf; | |
| 40 *buf = 0; | |
| 41 for ( j=7; j>=0; --j ) { | |
| 42 *buf |= (byte&0x01)<<j; | |
| 43 byte >>= 1; | |
| 44 } | |
| 45 } | |
| 46 } | |
| 47 line += bitmap->pitch; | |
| 48 bits += w; | |
| 49 } | |
| 50 return(bitmap); | |
| 51 } | |
| 52 | |
| 53 int main(int argc, char *argv[]) | |
| 54 { | |
| 55 SDL_Surface *screen; | |
| 56 SDL_Surface *bitmap; | |
| 57 Uint8 video_bpp; | |
| 58 Uint32 videoflags; | |
| 59 Uint8 *buffer; | |
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60 int i, k, done; |
| 0 | 61 SDL_Event event; |
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62 Uint16 *buffer16; |
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63 Uint16 color; |
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64 Uint8 gradient; |
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65 SDL_Color palette[256]; |
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66 |
| 0 | 67 |
| 68 /* Initialize SDL */ | |
| 69 if ( SDL_Init(SDL_INIT_VIDEO) < 0 ) { | |
| 70 fprintf(stderr, "Couldn't initialize SDL: %s\n",SDL_GetError()); | |
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71 return(1); |
| 0 | 72 } |
| 73 | |
| 74 video_bpp = 0; | |
| 75 videoflags = SDL_SWSURFACE; | |
| 76 while ( argc > 1 ) { | |
| 77 --argc; | |
| 78 if ( strcmp(argv[argc-1], "-bpp") == 0 ) { | |
| 79 video_bpp = atoi(argv[argc]); | |
| 80 --argc; | |
| 81 } else | |
| 82 if ( strcmp(argv[argc], "-warp") == 0 ) { | |
| 83 videoflags |= SDL_HWPALETTE; | |
| 84 } else | |
| 85 if ( strcmp(argv[argc], "-hw") == 0 ) { | |
| 86 videoflags |= SDL_HWSURFACE; | |
| 87 } else | |
| 88 if ( strcmp(argv[argc], "-fullscreen") == 0 ) { | |
| 89 videoflags |= SDL_FULLSCREEN; | |
| 90 } else { | |
| 91 fprintf(stderr, | |
| 92 "Usage: %s [-bpp N] [-warp] [-hw] [-fullscreen]\n", | |
| 93 argv[0]); | |
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parents:
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94 quit(1); |
| 0 | 95 } |
| 96 } | |
| 97 | |
| 98 /* Set 640x480 video mode */ | |
| 99 if ( (screen=SDL_SetVideoMode(640,480,video_bpp,videoflags)) == NULL ) { | |
| 100 fprintf(stderr, "Couldn't set 640x480x%d video mode: %s\n", | |
| 101 video_bpp, SDL_GetError()); | |
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102 quit(2); |
| 0 | 103 } |
| 104 | |
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105 if (video_bpp==8) { |
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106 /* Set a gray colormap, reverse order from white to black */ |
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107 for ( i=0; i<256; ++i ) { |
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108 palette[i].r = 255-i; |
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109 palette[i].g = 255-i; |
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110 palette[i].b = 255-i; |
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111 } |
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112 SDL_SetColors(screen, palette, 0, 256); |
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113 } |
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114 |
| 0 | 115 /* Set the surface pixels and refresh! */ |
| 116 if ( SDL_LockSurface(screen) < 0 ) { | |
| 117 fprintf(stderr, "Couldn't lock the display surface: %s\n", | |
| 118 SDL_GetError()); | |
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parents:
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119 quit(2); |
| 0 | 120 } |
| 121 buffer=(Uint8 *)screen->pixels; | |
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122 if (screen->format->BytesPerPixel!=2) { |
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123 for ( i=0; i<screen->h; ++i ) { |
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124 memset(buffer,(i*255)/screen->h, screen->pitch); |
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125 buffer += screen->pitch; |
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126 } |
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127 } |
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128 else |
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129 { |
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130 for ( i=0; i<screen->h; ++i ) { |
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131 gradient=((i*255)/screen->h); |
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132 color = SDL_MapRGB(screen->format, gradient, gradient, gradient); |
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133 buffer16=(Uint16*)buffer; |
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134 for (k=0; k<screen->w; k++) |
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135 { |
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136 *(buffer16+k)=color; |
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137 } |
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138 buffer += screen->pitch; |
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139 } |
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140 } |
| 0 | 141 SDL_UnlockSurface(screen); |
| 142 SDL_UpdateRect(screen, 0, 0, 0, 0); | |
| 143 | |
| 144 /* Load the bitmap */ | |
| 145 bitmap = LoadXBM(screen, picture_width, picture_height, | |
| 146 (Uint8 *)picture_bits); | |
| 147 if ( bitmap == NULL ) { | |
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Removed atexit() from most of the test programs; atexit(SDL_Quit) isn't safe
Ryan C. Gordon <icculus@icculus.org>
parents:
691
diff
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148 quit(1); |
| 0 | 149 } |
| 150 | |
| 151 /* Wait for a keystroke */ | |
| 152 done = 0; | |
| 153 while ( !done ) { | |
| 154 /* Check for events */ | |
| 155 while ( SDL_PollEvent(&event) ) { | |
| 156 switch (event.type) { | |
| 157 case SDL_MOUSEBUTTONDOWN: { | |
| 158 SDL_Rect dst; | |
| 159 | |
| 160 dst.x = event.button.x - bitmap->w/2; | |
| 161 dst.y = event.button.y - bitmap->h/2; | |
| 162 dst.w = bitmap->w; | |
| 163 dst.h = bitmap->h; | |
| 164 SDL_BlitSurface(bitmap, NULL, | |
| 165 screen, &dst); | |
| 166 SDL_UpdateRects(screen,1,&dst); | |
| 167 } | |
| 168 break; | |
| 169 case SDL_KEYDOWN: | |
| 170 /* Any key press quits the app... */ | |
| 171 done = 1; | |
| 172 break; | |
| 173 case SDL_QUIT: | |
| 174 done = 1; | |
| 175 break; | |
| 176 default: | |
| 177 break; | |
| 178 } | |
| 179 } | |
| 180 } | |
| 181 SDL_FreeSurface(bitmap); | |
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parents:
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182 SDL_Quit(); |
| 0 | 183 return(0); |
| 184 } |