Mercurial > sdl-ios-xcode
annotate test/testbitmap.c @ 4333:55717a755897 SDL-1.2
Switched from setting the period size and count to setting the buffer size directly, based on feedback from the ALSA development list:
http://mailman.alsa-project.org/pipermail/alsa-devel/2009-October/022267.html
This has the nice side effect of reducing latency on my SBLive! card.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Tue, 13 Oct 2009 09:56:15 +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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be9c9c8f6d53
Removed atexit() from most of the test programs; atexit(SDL_Quit) isn't safe
Ryan C. Gordon <icculus@icculus.org>
parents:
691
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11 /* Call this instead of exit(), so we can clean up SDL: atexit() is evil. */ |
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be9c9c8f6d53
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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12 static void quit(int rc) |
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be9c9c8f6d53
Removed atexit() from most of the test programs; atexit(SDL_Quit) isn't safe
Ryan C. Gordon <icculus@icculus.org>
parents:
691
diff
changeset
|
13 { |
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be9c9c8f6d53
Removed atexit() from most of the test programs; atexit(SDL_Quit) isn't safe
Ryan C. Gordon <icculus@icculus.org>
parents:
691
diff
changeset
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14 SDL_Quit(); |
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be9c9c8f6d53
Removed atexit() from most of the test programs; atexit(SDL_Quit) isn't safe
Ryan C. Gordon <icculus@icculus.org>
parents:
691
diff
changeset
|
15 exit(rc); |
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be9c9c8f6d53
Removed atexit() from most of the test programs; atexit(SDL_Quit) isn't safe
Ryan C. Gordon <icculus@icculus.org>
parents:
691
diff
changeset
|
16 } |
|
be9c9c8f6d53
Removed atexit() from most of the test programs; atexit(SDL_Quit) isn't safe
Ryan C. Gordon <icculus@icculus.org>
parents:
691
diff
changeset
|
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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be9c9c8f6d53
Removed atexit() from most of the test programs; atexit(SDL_Quit) isn't safe
Ryan C. Gordon <icculus@icculus.org>
parents:
691
diff
changeset
|
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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Removed atexit() from most of the test programs; atexit(SDL_Quit) isn't safe
Ryan C. Gordon <icculus@icculus.org>
parents:
691
diff
changeset
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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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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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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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Removed atexit() from most of the test programs; atexit(SDL_Quit) isn't safe
Ryan C. Gordon <icculus@icculus.org>
parents:
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diff
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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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1151
be9c9c8f6d53
Removed atexit() from most of the test programs; atexit(SDL_Quit) isn't safe
Ryan C. Gordon <icculus@icculus.org>
parents:
691
diff
changeset
|
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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be9c9c8f6d53
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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182 SDL_Quit(); |
| 0 | 183 return(0); |
| 184 } |