dos33fsprogs/gr-sim/fade.c

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C
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#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include "gr-sim.h"
#include "tfv_utils.h"
#include "tfv_zp.h"
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#include "demo_title.c"
#if 0
static int fade_map[2][16]={
// 0 1 2 3 4 5 6 7 8 9 a b c d e f
{0,1,2,2,4,5,2,5, 8,8,5,3,4,8,4,7},
{0,0,0,5,0,0,5,5, 0,0,0,5,8,5,5,5},
};
#endif
static int fade_map[2][16]={
// 0 1 2 3 4 5 6 7 8 9 a b c d e f
{0,0,0,2,0,0,2,5, 5,8,5,3,4,8,4,7},
{0,0,0,0,0,0,5,0, 0,0,0,0,8,0,0,5},
};
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int main(int argc, char **argv) {
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int x,temph,templ,ch;
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grsim_init();
gr();
// clear_screens();
ram[DRAW_PAGE]=PAGE0;
clear_bottom();
ram[DRAW_PAGE]=PAGE1;
clear_bottom();
ram[DRAW_PAGE]=PAGE2;
clear_bottom();
// clear_bottom(PAGE0);
// clear_bottom(PAGE1);
// clear_bottom(PAGE2);
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// grsim_unrle(demo_rle,0x400);
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grsim_unrle(demo_rle,0xc00);
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gr_copy_to_current(0xc00);
page_flip();
gr_copy_to_current(0xc00);
page_flip();
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while(1) {
repeat_until_keypressed();
/* Fade step 1 */
for(x=0xc00;x<0x1000;x++) {
temph=ram[x]&0xf0;
templ=ram[x]&0x0f;
templ=fade_map[0][templ];
temph=fade_map[0][temph>>4];
ram[x-0x800]=(temph<<4)|templ;
}
grsim_update();
ch=repeat_until_keypressed();
if (ch=='q') break;
/* Fade step 2 */
for(x=0xc00;x<0x1000;x++) {
temph=ram[x]&0xf0;
templ=ram[x]&0x0f;
templ=fade_map[1][templ];
temph=fade_map[1][temph>>4];
ram[x-0x800]=(temph<<4)|templ;
}
grsim_update();
ch=repeat_until_keypressed();
if (ch=='q') break;
/* Fade to black */
for(x=0x400;x<0x800;x++) {
ram[x]=0x00;
}
grsim_update();
ch=repeat_until_keypressed();
if (ch=='q') break;
/* Unfade step 2 */
for(x=0xc00;x<0x1000;x++) {
temph=ram[x]&0xf0;
templ=ram[x]&0x0f;
templ=fade_map[1][templ];
temph=fade_map[1][temph>>4];
ram[x-0x800]=(temph<<4)|templ;
}
grsim_update();
ch=repeat_until_keypressed();
if (ch=='q') break;
/* Unfade step 1 */
for(x=0xc00;x<0x1000;x++) {
temph=ram[x]&0xf0;
templ=ram[x]&0x0f;
templ=fade_map[0][templ];
temph=fade_map[0][temph>>4];
ram[x-0x800]=(temph<<4)|templ;
}
grsim_update();
ch=repeat_until_keypressed();
if (ch=='q') break;
/* Total unfade */
for(x=0xc00;x<0x1000;x++) {
temph=ram[x]&0xf0;
templ=ram[x]&0x0f;
ram[x-0x800]=(temph)|templ;
}
grsim_update();
ch=repeat_until_keypressed();
if (ch=='q') break;
}
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return 0;
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}