mirror of
https://github.com/deater/tb1.git
synced 2024-11-19 12:31:56 +00:00
137 lines
3.2 KiB
C
137 lines
3.2 KiB
C
/* Core Graphics routines for the Super VMW Graphics Library */
|
|
|
|
#include "svmwgraph.h"
|
|
#include <stdio.h>
|
|
|
|
#define DEBUG 1
|
|
|
|
/*---------------------------------------------------------------*\
|
|
| vmwPutPixel |
|
|
\*---------------------------------------------------------------*/
|
|
|
|
void vmwPutPixel(int x,int y,int color,vmwVisual *target) {
|
|
|
|
#ifdef DEBUG
|
|
if ( (y> (target->ysize-1) ) || (x> (target->xsize-1) ) ) {
|
|
printf("Out of bounds with PutPixel %i,%i\n",x,y);
|
|
return;
|
|
}
|
|
#endif
|
|
|
|
target->memory[(y*target->xsize)+x]=color;
|
|
|
|
}
|
|
|
|
unsigned char vmwGetPixel(int x,int y,vmwVisual *source) {
|
|
|
|
return source->memory[(y*source->xsize)+x];
|
|
|
|
}
|
|
|
|
|
|
void vmwClearScreen(vmwVisual *target, int color) {
|
|
|
|
memset(target->memory,color,target->xsize*target->ysize);
|
|
|
|
}
|
|
|
|
/*---------------------------------------------------------------*\
|
|
| vmwDrawHLine |
|
|
| This is really begging to be optimized. I am sure some |
|
|
| targets can do this in hardware |
|
|
\*---------------------------------------------------------------*/
|
|
|
|
void vmwDrawHLine(int xstart,int ystart,int how_long,int color,
|
|
vmwVisual *target) {
|
|
|
|
unsigned char *temp_pointer;
|
|
int i;
|
|
|
|
temp_pointer=target->memory+(ystart*target->xsize)+xstart;
|
|
|
|
for(i=0;i<how_long;i++) {
|
|
*temp_pointer=color;
|
|
temp_pointer++;
|
|
#ifdef DEBUG
|
|
if (xstart+i>target->xsize-1) {
|
|
printf("Out of bounds!\n");
|
|
return;
|
|
}
|
|
#endif
|
|
}
|
|
}
|
|
|
|
|
|
void vmwDrawVLine(int xstart,int ystart,int how_long,int color,
|
|
vmwVisual *target) {
|
|
|
|
unsigned char *temp_pointer;
|
|
int i;
|
|
|
|
temp_pointer=target->memory+(ystart*target->xsize)+xstart;
|
|
|
|
for(i=0;i<how_long;i++) {
|
|
*temp_pointer=color;
|
|
temp_pointer+=target->xsize;
|
|
}
|
|
}
|
|
|
|
void vmwLine(int x1, int y1, int x2, int y2, int color,
|
|
vmwVisual *destination) {
|
|
|
|
/*function sgn(a:real):integer;
|
|
begin
|
|
if a>0 then sgn:=+1;
|
|
if a<0 then sgn:=-1;
|
|
if a=0 then sgn:=0;
|
|
end;
|
|
|
|
procedure line(a,b,c,d,col:integer;where:word);
|
|
var u,s,v,d1x,d1y,d2x,d2y,m,n:real;
|
|
i:integer;
|
|
begin
|
|
u:= c - a;
|
|
v:= d - b;
|
|
d1x:= SGN(u);
|
|
d1y:= SGN(v);
|
|
d2x:= SGN(u);
|
|
d2y:= 0;
|
|
m:= ABS(u);
|
|
n := ABS(v);
|
|
IF NOT (M>N) then
|
|
BEGIN
|
|
d2x := 0 ;
|
|
d2y := SGN(v);
|
|
m := ABS(v);
|
|
n := ABS(u);
|
|
END;
|
|
s := INT(m / 2);
|
|
FOR i := 0 TO round(m) DO
|
|
BEGIN
|
|
putpixel(a,b,col,where);
|
|
s := s + n;
|
|
IF not (s<m) THEN
|
|
BEGIN
|
|
s := s - m;
|
|
a:= a +round(d1x);
|
|
b := b + round(d1y);
|
|
END
|
|
ELSE
|
|
BEGIN
|
|
a := a + round(d2x);
|
|
b := b + round(d2y);
|
|
END;
|
|
end;
|
|
END;
|
|
*/
|
|
|
|
}
|
|
|
|
void vmwDrawBox(int x1,int y1,int xsize,int ysize,int col, vmwVisual *where) {
|
|
int i;
|
|
|
|
for(i=0;i<ysize;i++) {
|
|
vmwDrawHLine(x1,y1+i,xsize,col,where);
|
|
}
|
|
}
|