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998
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1 #include "fb.h"
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2 #include <SDL.h>
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3 using namespace std;
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4
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5 void send_current_error_msg(const char *ptr)
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6 {
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7 fprintf( stderr , "%s\n" , ptr );
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8 }
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9
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10 void send_current_information(const char *ptr)
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11 {
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12 fprintf( stdout , "%s\n" , ptr );
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13 }
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14
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15 const int redMask = 0x00ff0000;
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16 const int greenMask = 0x0000ff00;
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17 const int blueMask = 0x000000ff;
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18 const int alphaMask = 0xff000000;
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19
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20 fb_t
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21 get_fbdev_addr(void)
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22 {
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23 int fd_framebuffer ;
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24 struct fb_var_screeninfo vinfo;
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25 struct fb_fix_screeninfo finfo;
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26 long int screensize ;
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27 //long int location;
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28 char *fbptr ;
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29 char tmp[DIV_BYTE*10];
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30
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31 //int x , y ;
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32 int xres,yres,vbpp,line_len;
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33 //unsigned short tcolor ;
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34
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35 /* 読み書き用にファイルを開く */
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36 fd_framebuffer = open( DEVICE_NAME , O_RDWR);
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37 if ( !fd_framebuffer ) {
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38 send_current_error_msg("Framebuffer device open error !");
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39 exit(1);
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40 }
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41 send_current_information("The framebuffer device was opened !");
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42
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43 /* 固定スクリーン情報取得 */
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44 if ( ioctl( fd_framebuffer , FBIOGET_FSCREENINFO , &finfo ) ) {
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45 send_current_error_msg("Fixed information not gotton !");
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46 exit(2);
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47 }
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48
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49 /* 変動スクリーン情報取得 */
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50 if ( ioctl( fd_framebuffer , FBIOGET_VSCREENINFO , &vinfo ) ) {
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51 send_current_error_msg("Variable information not gotton !");
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52 exit(3);
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53 }
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54 xres = vinfo.xres ;
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55 yres = vinfo.yres ;
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56 printf("vinfo.yres %d \n", vinfo.yres);
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57 vbpp = vinfo.bits_per_pixel ;
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58 line_len = finfo.line_length ;
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59 sprintf( tmp , "%d(pixel)x%d(line), %dbpp(bits per pixel)",xres,yres,vbpp);
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60 sprintf( tmp , "%d(xoffset)x%d(yoffset)",vinfo.xoffset, vinfo.yoffset);
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61 send_current_information( tmp );
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62
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63 /* バイト単位でのスクリーンのサイズを計算 */
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64 screensize = xres * yres * vbpp / DIV_BYTE ;
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65
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66 /* デバイスをメモリにマップする */
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67 fbptr = (char *)mmap(0,screensize,PROT_READ | PROT_WRITE,MAP_SHARED,fd_framebuffer,0);
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68 if ( (int)fbptr == -1 ) {
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69 send_current_error_msg("Don't get framebuffer device to memory !");
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70 exit(4);
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71 }
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72 send_current_information("The framebuffer device was mapped !");
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73
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74 printf("fb: 0x%x \n", (unsigned int)fbptr);
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75
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76 fb_t fb;
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77 fb.pixels = fbptr;
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78 fb.size = screensize;
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79 fb.width = xres;
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80 fb.height = yres;
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81 fb.bpp = vbpp;
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82 fb.fd = fd_framebuffer;
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83
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84 return fb;
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85
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86 }
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87
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88 int main() {
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89
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90 fb_t fb = get_fbdev_addr();
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91
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92 void *p;
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93 Uint32 *gUra;
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94
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95 gUra = (Uint32*)fb.pixels;
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96 //gUra = (Uint32*)malloc(fb.width*fb.height*4);
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97
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98 printf("fb.height %d \n", fb.height);
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99
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100 int i;
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101 int color = 0;
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102
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103 for (i = 0; i < fb.width*fb.height; i++) {
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104 gUra[i] = color;
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105 }
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106
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107
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108 //初期化
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109 if (SDL_Init( SDL_INIT_VIDEO | SDL_INIT_TIMER | SDL_INIT_JOYSTICK ) < 0) {
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110 printf("SDL_Init failed\n");
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111 return -1;
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112 }
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113
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114 printf("fb.width %d fb.height %d fb.bpp %d \n",fb.width, fb.height, fb.bpp);
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115
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116 SDL_Surface *screen=SDL_SetVideoMode(fb.width,fb.height,fb.bpp,SDL_HWSURFACE);
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117 if (screen == NULL) {
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118 printf("SDL_Surface failed\n");
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119 SDL_Quit();
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120 return -1;
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121 }
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122
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123 int done = 0;
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124 SDL_Event event;
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125
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126 int fps=0;
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127
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128 Uint32 t1=SDL_GetTicks();
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129
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130 while(!done){
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131 while(SDL_PollEvent(&event)){
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132 switch(event.type){
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133 case SDL_QUIT:
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134 done = 1;
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135 break;
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136 case SDL_KEYDOWN:
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137 if(event.key.keysym.sym == SDLK_ESCAPE){
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138 done = 1;
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139 }
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140 break;
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141 }
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142 }
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143
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144 if (color == 0xffffffff) {
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145 color = 0;
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146 } else {
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147
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148 char r = ((color & redMask) >> 16) + 1;
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149 char g = ((color & greenMask) >> 8) + 1;
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150 char b = (color & blueMask) + 1;
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151
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152 color = alphaMask + (r << 16) + (g << 8) + b;
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153
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154 }
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155
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156 for (i = 0; i < fb.width*fb.height; i++) {
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157 gUra[i] = color;
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158 }
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159
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160
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161 if (SDL_GetTicks() < t1 + 1000){
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162 fps++;
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163 } else{
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164 printf("fps=%d\n", fps);
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165 fps=0;
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166 t1=SDL_GetTicks();
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167 }
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168 }
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169
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170 for (i = 0; i < fb.width*fb.height; i++) {
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171 gUra[i] = 0;
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172 }
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173 munmap(fb.pixels, fb.size);
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174 close(fb.fd);
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175 SDL_Quit();
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176
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177
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178 return 0;
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179
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180 }
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181
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