Mercurial > sdl-ios-xcode
annotate test/testbitmap.c @ 896:b56dc586a5ef
Date: Tue, 16 Mar 2004 12:40:33 +0000
From: Alan Swanson
Subject: [SDL] [PATCH] Linux joystick evdev axis count fix
The event device configuration under Linux does not check the returned
ioctl value when reading the axis information. This means extra
undefined axes are returned.
Note, in EV_HandleEvents, the default for case EV_ABS is to return any
axis information which is fine as we have already checked for all valid
absolute axes. No new axes should be returned after opening the device.
(Unless, of course, the evdev allows closing and reassigning a new
device while in use and I can't believe that happens.)
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Sun, 16 May 2004 22:48:06 +0000 |
| parents | 609543e2b3a1 |
| children | be9c9c8f6d53 |
| 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 | |
| 11 SDL_Surface *LoadXBM(SDL_Surface *screen, int w, int h, Uint8 *bits) | |
| 12 { | |
| 13 SDL_Surface *bitmap; | |
| 14 Uint8 *line; | |
| 15 | |
| 16 /* Allocate the bitmap */ | |
| 17 bitmap = SDL_CreateRGBSurface(SDL_SWSURFACE, w, h, 1, 0, 0, 0, 0); | |
| 18 if ( bitmap == NULL ) { | |
| 19 fprintf(stderr, "Couldn't allocate bitmap: %s\n", | |
| 20 SDL_GetError()); | |
| 21 return(NULL); | |
| 22 } | |
| 23 | |
| 24 /* Copy the pixels */ | |
| 25 line = (Uint8 *)bitmap->pixels; | |
| 26 w = (w+7)/8; | |
| 27 while ( h-- ) { | |
| 28 memcpy(line, bits, w); | |
| 29 /* X11 Bitmap images have the bits reversed */ | |
| 30 { int i, j; Uint8 *buf, byte; | |
| 31 for ( buf=line, i=0; i<w; ++i, ++buf ) { | |
| 32 byte = *buf; | |
| 33 *buf = 0; | |
| 34 for ( j=7; j>=0; --j ) { | |
| 35 *buf |= (byte&0x01)<<j; | |
| 36 byte >>= 1; | |
| 37 } | |
| 38 } | |
| 39 } | |
| 40 line += bitmap->pitch; | |
| 41 bits += w; | |
| 42 } | |
| 43 return(bitmap); | |
| 44 } | |
| 45 | |
| 46 int main(int argc, char *argv[]) | |
| 47 { | |
| 48 SDL_Surface *screen; | |
| 49 SDL_Surface *bitmap; | |
| 50 Uint8 video_bpp; | |
| 51 Uint32 videoflags; | |
| 52 Uint8 *buffer; | |
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53 int i, k, done; |
| 0 | 54 SDL_Event event; |
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55 Uint16 *buffer16; |
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56 Uint16 color; |
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57 Uint8 gradient; |
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58 SDL_Color palette[256]; |
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59 |
| 0 | 60 |
| 61 /* Initialize SDL */ | |
| 62 if ( SDL_Init(SDL_INIT_VIDEO) < 0 ) { | |
| 63 fprintf(stderr, "Couldn't initialize SDL: %s\n",SDL_GetError()); | |
| 64 exit(1); | |
| 65 } | |
| 66 atexit(SDL_Quit); | |
| 67 | |
| 68 video_bpp = 0; | |
| 69 videoflags = SDL_SWSURFACE; | |
| 70 while ( argc > 1 ) { | |
| 71 --argc; | |
| 72 if ( strcmp(argv[argc-1], "-bpp") == 0 ) { | |
| 73 video_bpp = atoi(argv[argc]); | |
| 74 --argc; | |
| 75 } else | |
| 76 if ( strcmp(argv[argc], "-warp") == 0 ) { | |
| 77 videoflags |= SDL_HWPALETTE; | |
| 78 } else | |
| 79 if ( strcmp(argv[argc], "-hw") == 0 ) { | |
| 80 videoflags |= SDL_HWSURFACE; | |
| 81 } else | |
| 82 if ( strcmp(argv[argc], "-fullscreen") == 0 ) { | |
| 83 videoflags |= SDL_FULLSCREEN; | |
| 84 } else { | |
| 85 fprintf(stderr, | |
| 86 "Usage: %s [-bpp N] [-warp] [-hw] [-fullscreen]\n", | |
| 87 argv[0]); | |
| 88 exit(1); | |
| 89 } | |
| 90 } | |
| 91 | |
| 92 /* Set 640x480 video mode */ | |
| 93 if ( (screen=SDL_SetVideoMode(640,480,video_bpp,videoflags)) == NULL ) { | |
| 94 fprintf(stderr, "Couldn't set 640x480x%d video mode: %s\n", | |
| 95 video_bpp, SDL_GetError()); | |
| 96 exit(2); | |
| 97 } | |
| 98 | |
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99 if (video_bpp==8) { |
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100 /* Set a gray colormap, reverse order from white to black */ |
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101 for ( i=0; i<256; ++i ) { |
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102 palette[i].r = 255-i; |
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103 palette[i].g = 255-i; |
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104 palette[i].b = 255-i; |
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105 } |
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106 SDL_SetColors(screen, palette, 0, 256); |
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107 } |
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108 |
| 0 | 109 /* Set the surface pixels and refresh! */ |
| 110 if ( SDL_LockSurface(screen) < 0 ) { | |
| 111 fprintf(stderr, "Couldn't lock the display surface: %s\n", | |
| 112 SDL_GetError()); | |
| 113 exit(2); | |
| 114 } | |
| 115 buffer=(Uint8 *)screen->pixels; | |
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116 if (screen->format->BytesPerPixel!=2) { |
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117 for ( i=0; i<screen->h; ++i ) { |
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118 memset(buffer,(i*255)/screen->h, screen->pitch); |
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119 buffer += screen->pitch; |
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120 } |
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121 } |
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122 else |
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123 { |
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124 for ( i=0; i<screen->h; ++i ) { |
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125 gradient=((i*255)/screen->h); |
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126 color = SDL_MapRGB(screen->format, gradient, gradient, gradient); |
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127 buffer16=(Uint16*)buffer; |
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128 for (k=0; k<screen->w; k++) |
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129 { |
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130 *(buffer16+k)=color; |
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131 } |
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132 buffer += screen->pitch; |
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133 } |
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134 } |
| 0 | 135 SDL_UnlockSurface(screen); |
| 136 SDL_UpdateRect(screen, 0, 0, 0, 0); | |
| 137 | |
| 138 /* Load the bitmap */ | |
| 139 bitmap = LoadXBM(screen, picture_width, picture_height, | |
| 140 (Uint8 *)picture_bits); | |
| 141 if ( bitmap == NULL ) { | |
| 142 exit(1); | |
| 143 } | |
| 144 | |
| 145 /* Wait for a keystroke */ | |
| 146 done = 0; | |
| 147 while ( !done ) { | |
| 148 /* Check for events */ | |
| 149 while ( SDL_PollEvent(&event) ) { | |
| 150 switch (event.type) { | |
| 151 case SDL_MOUSEBUTTONDOWN: { | |
| 152 SDL_Rect dst; | |
| 153 | |
| 154 dst.x = event.button.x - bitmap->w/2; | |
| 155 dst.y = event.button.y - bitmap->h/2; | |
| 156 dst.w = bitmap->w; | |
| 157 dst.h = bitmap->h; | |
| 158 SDL_BlitSurface(bitmap, NULL, | |
| 159 screen, &dst); | |
| 160 SDL_UpdateRects(screen,1,&dst); | |
| 161 } | |
| 162 break; | |
| 163 case SDL_KEYDOWN: | |
| 164 /* Any key press quits the app... */ | |
| 165 done = 1; | |
| 166 break; | |
| 167 case SDL_QUIT: | |
| 168 done = 1; | |
| 169 break; | |
| 170 default: | |
| 171 break; | |
| 172 } | |
| 173 } | |
| 174 } | |
| 175 SDL_FreeSurface(bitmap); | |
| 176 return(0); | |
| 177 } |