Mercurial > sdl-ios-xcode
annotate test/testbitmap.c @ 941:5095c4a264aa
Date: Mon, 12 Jul 2004 14:17:47 -0500
From: Richard Smith
Subject: Re: [SDL] Disableing color depth and mode searching
> Also, I should add that a quick way to get the desired effect is to
> #define BROKEN_MODES on top of the SDL_fbvideo.c file.
>
Ah yes, I see that looks like that will do what I need. Curious as to
why this is a #define and not an enviroment variable like the other
settings.
I would think that finding cards (or chips) with broken modes would be
the norm rather than the execption.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Sat, 21 Aug 2004 11:34:24 +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 } |