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#include "zxvid_com.h"
#ifdef USE_GREY
#define N0 0x00
#define N1 0xC0
#define B0 0x00
#define B1 0xFF
static unsigned char graybuffer[LCD_HEIGHT*LCD_WIDTH] IBSS_ATTR; /* off screen buffer */
static const unsigned char graylevels[16] = {
N0, (6*N0+1*N1)/7, (5*N0+2*N1)/7, (4*N0+3*N1)/7,
(3*N0+4*N1)/7, (2*N0+5*N1)/7, (1*N0+6*N1)/7, N1,
B0, (6*B0+1*B1)/7, (5*B0+2*B1)/7, (4*B0+3*B1)/7,
(3*B0+4*B1)/7, (2*B0+5*B1)/7, (1*B0+6*B1)/7, B1
};
void init_spect_scr(void)
{
int i;
unsigned mask = settings.invert_colors ? 0xFF : 0;
for(i = 0; i < 16; i++)
sp_colors[i] = graylevels[i] ^ mask;
sp_image = (char *) &image_array;
spscr_init_mask_color();
spscr_init_line_pointers(HEIGHT);
}
void update_screen(void)
{
char str[80];
int y=0;
int x=0;
unsigned char* image;
int srcx, srcy=0; /* x / y coordinates in source image */
image = sp_image + ( (Y_OFF)*(WIDTH) ) + X_OFF;
unsigned char* buf_ptr;
buf_ptr = graybuffer;
for(y = 0; y < LCD_HEIGHT; y++)
{
srcx = 0; /* reset our x counter before each row... */
for(x = 0; x < LCD_WIDTH; x++)
{
*buf_ptr=image[(srcx>>16)];
srcx += X_STEP; /* move through source image */
buf_ptr++;
}
srcy += Y_STEP; /* move through the source image... */
image += (srcy>>16)*WIDTH; /* and possibly to the next row. */
srcy &= 0xffff; /* set up the y-coordinate between 0 and 1 */
}
#ifdef USE_BUFFERED_GREY
grey_gray_bitmap(graybuffer, 0, 0, LCD_WIDTH, LCD_HEIGHT);
#endif
if ( settings.showfps ) {
int percent=0;
int TPF = HZ/50;/* ticks per frame */
if ((*rb->current_tick-start_time) > TPF )
percent = 100*video_frames/((*rb->current_tick-start_time)/TPF);
rb->snprintf(str,sizeof(str),"%d %%",percent);
#if defined USE_BUFFERED_GREY
grey_putsxy(0,0,str);
#else
LOGF(str);
#endif
}
#if defined USE_BUFFERED_GREY
grey_update();
#else
grey_ub_gray_bitmap(graybuffer, 0, 0, LCD_WIDTH, LCD_HEIGHT);
#endif
}
#endif /* USE_GREY */
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