apps/plugins/zxbox/zxvid_grey.c

   1 #include "zxvid_com.h"
   2
   3 #ifdef USE_GREY
   4
   5 #define N0 0x00
   6 #define N1 0xC0
   7 #define B0 0x00
   8 #define B1 0xFF
   9
  10 static unsigned char graybuffer[LCD_HEIGHT*LCD_WIDTH] IBSS_ATTR; /* off screen buffer */
  11
  12 static const unsigned char graylevels[16] = {
  13     N0, (6*N0+1*N1)/7, (5*N0+2*N1)/7, (4*N0+3*N1)/7,
  14     (3*N0+4*N1)/7, (2*N0+5*N1)/7, (1*N0+6*N1)/7, N1,
  15     B0, (6*B0+1*B1)/7, (5*B0+2*B1)/7, (4*B0+3*B1)/7,
  16     (3*B0+4*B1)/7, (2*B0+5*B1)/7, (1*B0+6*B1)/7, B1
  17 };
  18
  19 void init_spect_scr(void)
  20 {
  21     int i;
  22     unsigned mask = settings.invert_colors ? 0xFF : 0;
  23
  24     for(i = 0; i < 16; i++)
  25         sp_colors[i] = graylevels[i] ^ mask;
  26
  27     sp_image = (char *) &image_array;
  28     spscr_init_mask_color();
  29     spscr_init_line_pointers(HEIGHT);
  30 }
  31
  32
  33 void update_screen(void)
  34 {
  35     char str[80];
  36
  37     int y=0;
  38     int x=0;
  39     unsigned char* image;
  40     int srcx, srcy=0;     /* x / y coordinates in source image */
  41     image = sp_image + ( (Y_OFF)*(WIDTH) ) + X_OFF;
  42     unsigned char* buf_ptr;
  43     buf_ptr = graybuffer;
  44     for(y = 0; y < LCD_HEIGHT; y++)
  45     {
  46         srcx = 0;           /* reset our x counter before each row... */
  47         for(x = 0; x < LCD_WIDTH; x++)
  48         {
  49             *buf_ptr=image[(srcx>>16)];
  50             srcx += X_STEP;    /* move through source image */
  51             buf_ptr++;
  52         }
  53         srcy += Y_STEP;      /* move through the source image... */
  54         image += (srcy>>16)*WIDTH;   /* and possibly to the next row. */
  55         srcy &= 0xffff;     /* set up the y-coordinate between 0 and 1 */
  56     }
  57
  58 #ifdef USE_BUFFERED_GREY
  59     grey_gray_bitmap(graybuffer, 0, 0, LCD_WIDTH, LCD_HEIGHT);
  60 #endif
  61
  62     if ( settings.showfps ) {
  63         int percent=0;
  64         int TPF = HZ/50;/* ticks per frame */
  65         if ((*rb->current_tick-start_time) > TPF )
  66             percent = 100*video_frames/((*rb->current_tick-start_time)/TPF);
  67         rb->snprintf(str,sizeof(str),"%d %%",percent);
  68 #if defined USE_BUFFERED_GREY
  69         grey_putsxy(0,0,str);
  70 #else
  71         LOGF(str);
  72 #endif
  73
  74     }
  75
  76
  77 #if defined USE_BUFFERED_GREY
  78     grey_update();
  79 #else
  80     grey_ub_gray_bitmap(graybuffer, 0, 0, LCD_WIDTH, LCD_HEIGHT);
  81 #endif
  82
  83 }
  84
  85 #endif /* USE_GREY */