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tfv: minimal sprite implementation

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This commit is contained in:
Vince Weaver 2017-05-12 12:50:24 -04:00
parent a8970f761b
commit 225dc6f4cc
3 changed files with 73 additions and 2 deletions
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48
gr-sim/gr-sim.c
View File

@ -595,3 +595,51 @@ int basic_vlin(int y1, int y2, int at) {
return 0;
}
short gr_addr_lookup[48]={
0x400,0x480,0x500,0x580,0x600,0x680,0x700,0x780,
0x428,0x4a8,0x528,0x5a8,0x628,0x6a8,0x728,0x7a8,
0x450,0x4d0,0x550,0x5d0,0x650,0x6d0,0x750,0x7d0,
};
int grsim_put_sprite(unsigned char *sprite_data, int xpos, int ypos) {
int i,j,xsize,ysize;
unsigned char *ptr;
short address;
ptr=sprite_data;
xsize=*ptr;
ptr++;
ysize=*ptr;
ptr++;
for(j=0;j<ysize;j++) {
address=gr_addr_lookup[(ypos+j)/2];
address+=xpos;
for(i=0;i<xsize;i++) {
if (*ptr) ram[address]=*ptr;
ptr++;
address++;
}
}
return 0;
}
int gr_copy(short source, short dest) {
short dest_addr,source_addr;
int i,j;
for(i=0;i<8;i++) {
source_addr=gr_addr_lookup[i]+0x400;
dest_addr=gr_addr_lookup[i];
for(j=0;j<120;j++) {
ram[dest_addr+j]=ram[source_addr+j];
}
}
return 0;
}

3
gr-sim/gr-sim.h
View File

@ -11,4 +11,5 @@ int bload(char *filename, int address);
int scrn(unsigned char xcoord, unsigned char ycoord);
int grsim_unrle(unsigned char *rle_data, int address);
int home(void);
int grsim_put_sprite(unsigned char *sprite_data, int xpos, int ypos);
int gr_copy(short source, short dest);

24
gr-sim/tfv.c
View File

@ -32,23 +32,45 @@ static unsigned char title_rle[]=
};
static unsigned char test_sprite[]={
0x8,0x4,
0x55,0x50,0x00,0x00,0x00,0x00,0x00,0x00,
0x55,0x55,0x55,0x00,0x00,0x00,0x00,0x00,
0xff,0x1f,0x4f,0x2f,0xff,0x22,0x20,0x00,
0x5f,0x5f,0x5f,0x5f,0xff,0xf2,0xf2,0xf2,
};
int main(int argc, char **argv) {
int ch;
int x,y;
grsim_init();
/* Title Screen */
grsim_unrle(title_rle,0x400);
grsim_unrle(title_rle,0x800);
gr_copy(0x800,0x400);
grsim_update();
x=20; y=21;
color_equals(0);
while(1) {
ch=grsim_input();
if (ch=='q') break;
if (ch=='i') if (y>0) y-=2;
if (ch=='m') if (y<39) y+=2;
if (ch=='j') if (x>0) x--;
if (ch=='k') if (x<39) x++;
gr_copy(0x800,0x400);
grsim_put_sprite(test_sprite,x,y);
grsim_update();
usleep(100000);
}