apps/plugins/zxbox/zxvid_2bpp.c

   1 #include "zxvid_com.h"
   2
   3 #ifndef USE_GREY
   4 /* screen routines for greyscale targets not using greyscale lib */
   5
   6 #if LCD_PIXELFORMAT == HORIZONTAL_PACKING
   7 #define FB_WIDTH ((LCD_WIDTH+3)/4)
   8 fb_data pixmask[4] ICONST_ATTR = {
   9     0xC0, 0x30, 0x0C, 0x03
  10 };
  11 #elif LCD_PIXELFORMAT == VERTICAL_PACKING
  12 fb_data pixmask[4] ICONST_ATTR = {
  13     0x03, 0x0C, 0x30, 0xC0
  14 };
  15 #elif LCD_PIXELFORMAT == VERTICAL_INTERLEAVED
  16 fb_data pixmask[8] ICONST_ATTR = {
  17     0x0101, 0x0202, 0x0404, 0x0808, 0x1010, 0x2020, 0x4040, 0x8080
  18 };
  19 fb_data pixval[4] ICONST_ATTR = {
  20     0x0000, 0x0001, 0x0100, 0x0101
  21 };
  22 #endif
  23
  24 static const unsigned char graylevels[16] = {
  25     0, 1, 1, 1, 2, 2, 3, 3,
  26     0, 1, 1, 1, 2, 2, 3, 3
  27 };
  28
  29 void init_spect_scr(void)
  30 {
  31     int i;
  32     unsigned mask = settings.invert_colors ? 0 : 3;
  33
  34     for(i = 0; i < 16; i++)
  35         sp_colors[i] = graylevels[i] ^ mask;
  36
  37     sp_image = (char *) &image_array;
  38     spscr_init_mask_color();
  39     spscr_init_line_pointers(HEIGHT);
  40
  41 }
  42 void update_screen(void)
  43 {
  44     fb_data *frameb;
  45     int y=0;
  46     int x=0;
  47     unsigned char* image;
  48     int srcx, srcy=0;     /* x / y coordinates in source image */
  49     image = sp_image + ( (Y_OFF)*(WIDTH) ) + X_OFF;
  50     unsigned mask;
  51 #if LCD_PIXELFORMAT == HORIZONTAL_PACKING
  52     for(y = 0; y < LCD_HEIGHT; y++)
  53     {
  54         frameb = rb->lcd_framebuffer + (y) * FB_WIDTH;
  55         srcx = 0;           /* reset our x counter before each row... */
  56         for(x = 0; x < LCD_WIDTH; x++)
  57         {
  58             mask = ~pixmask[x & 3];
  59             frameb[x >> 2] = (frameb[x >> 2] & mask) |  ((image[(srcx>>16)]&0x3) << ((3-(x & 3 )) * 2 ));
  60             srcx += X_STEP;    /* move through source image */
  61         }
  62         srcy += Y_STEP;      /* move through the source image... */
  63         image += (srcy>>16)*WIDTH;   /* and possibly to the next row. */
  64         srcy &= 0xffff;     /* set up the y-coordinate between 0 and 1 */
  65     }
  66 #elif LCD_PIXELFORMAT == VERTICAL_PACKING
  67     int shift;
  68     for(y = 0; y < LCD_HEIGHT; y++)
  69     {
  70         frameb = rb->lcd_framebuffer + (y/4) * LCD_WIDTH;
  71         srcx = 0;           /* reset our x counter before each row... */
  72         shift = ((y & 3 ) * 2 );
  73         mask = ~pixmask[y & 3];
  74         for(x = 0; x < LCD_WIDTH; x++)
  75         {
  76             frameb[x] = (frameb[x] & mask) |  ((image[(srcx>>16)]&0x3) << shift );
  77             srcx += X_STEP;    /* move through source image */
  78         }
  79         srcy += Y_STEP;      /* move through the source image... */
  80         image += (srcy>>16)*WIDTH;   /* and possibly to the next row. */
  81         srcy &= 0xffff;     /* set up the y-coordinate between 0 and 1 */
  82     }
  83 #elif LCD_PIXELFORMAT == VERTICAL_INTERLEAVED
  84     int shift;
  85     for(y = 0; y < LCD_HEIGHT; y++)
  86     {
  87         frameb = rb->lcd_framebuffer + (y/8) * LCD_WIDTH;
  88         srcx = 0;           /* reset our x counter before each row... */
  89         shift = (y & 7);
  90         mask = ~pixmask[y & 7];
  91         for(x = 0; x < LCD_WIDTH; x++)
  92         {
  93             frameb[x] = (frameb[x] & mask) |  (pixval[image[(srcx>>16)]&0x3] << shift );
  94             srcx += X_STEP;    /* move through source image */
  95         }
  96         srcy += Y_STEP;      /* move through the source image... */
  97         image += (srcy>>16)*WIDTH;   /* and possibly to the next row. */
  98         srcy &= 0xffff;     /* set up the y-coordinate between 0 and 1 */
  99     }
 100 #endif
 101
 102     if ( settings.showfps ) {
 103         int percent=0;
 104         int TPF = HZ/50;/* ticks per frame */
 105         if ((*rb->current_tick-start_time) > TPF )
 106             percent = 100*video_frames/((*rb->current_tick-start_time)/TPF);
 107         rb->lcd_putsxyf(0,0,"%d %%",percent);
 108     }
 109
 110
 111     rb -> lcd_update();
 112 }
 113
 114 #endif /* !USE_GREY */