1 76193d7c 2003-09-30 devnull #include <u.h>
  2 76193d7c 2003-09-30 devnull #include <libc.h>
  3 76193d7c 2003-09-30 devnull #include <draw.h>
  4 76193d7c 2003-09-30 devnull 
  5 76193d7c 2003-09-30 devnull Point
  6 76193d7c 2003-09-30 devnull Pt(int x, int y)
  7 76193d7c 2003-09-30 devnull {
  8 76193d7c 2003-09-30 devnull 	Point p;
  9 76193d7c 2003-09-30 devnull 
 10 76193d7c 2003-09-30 devnull 	p.x = x;
 11 76193d7c 2003-09-30 devnull 	p.y = y;
 12 76193d7c 2003-09-30 devnull 	return p;
 13 76193d7c 2003-09-30 devnull }
 14 76193d7c 2003-09-30 devnull 
 15 76193d7c 2003-09-30 devnull Rectangle
 16 76193d7c 2003-09-30 devnull Rect(int x, int y, int bx, int by)
 17 76193d7c 2003-09-30 devnull {
 18 76193d7c 2003-09-30 devnull 	Rectangle r;
 19 76193d7c 2003-09-30 devnull 
 20 76193d7c 2003-09-30 devnull 	r.min.x = x;
 21 76193d7c 2003-09-30 devnull 	r.min.y = y;
 22 76193d7c 2003-09-30 devnull 	r.max.x = bx;
 23 76193d7c 2003-09-30 devnull 	r.max.y = by;
 24 76193d7c 2003-09-30 devnull 	return r;
 25 76193d7c 2003-09-30 devnull }
 26 76193d7c 2003-09-30 devnull 
 27 76193d7c 2003-09-30 devnull Rectangle
 28 76193d7c 2003-09-30 devnull Rpt(Point min, Point max)
 29 76193d7c 2003-09-30 devnull {
 30 76193d7c 2003-09-30 devnull 	Rectangle r;
 31 76193d7c 2003-09-30 devnull 
 32 76193d7c 2003-09-30 devnull 	r.min = min;
 33 76193d7c 2003-09-30 devnull 	r.max = max;
 34 76193d7c 2003-09-30 devnull 	return r;
 35 76193d7c 2003-09-30 devnull }
 36 76193d7c 2003-09-30 devnull 
 37 76193d7c 2003-09-30 devnull Point
 38 76193d7c 2003-09-30 devnull addpt(Point a, Point b)
 39 76193d7c 2003-09-30 devnull {
 40 76193d7c 2003-09-30 devnull 	a.x += b.x;
 41 76193d7c 2003-09-30 devnull 	a.y += b.y;
 42 76193d7c 2003-09-30 devnull 	return a;
 43 76193d7c 2003-09-30 devnull }
 44 76193d7c 2003-09-30 devnull 
 45 76193d7c 2003-09-30 devnull Point
 46 76193d7c 2003-09-30 devnull subpt(Point a, Point b)
 47 76193d7c 2003-09-30 devnull {
 48 76193d7c 2003-09-30 devnull 	a.x -= b.x;
 49 76193d7c 2003-09-30 devnull 	a.y -= b.y;
 50 76193d7c 2003-09-30 devnull 	return a;
 51 76193d7c 2003-09-30 devnull }
 52 76193d7c 2003-09-30 devnull 
 53 76193d7c 2003-09-30 devnull Rectangle
 54 76193d7c 2003-09-30 devnull insetrect(Rectangle r, int n)
 55 76193d7c 2003-09-30 devnull {
 56 76193d7c 2003-09-30 devnull 	r.min.x += n;
 57 76193d7c 2003-09-30 devnull 	r.min.y += n;
 58 76193d7c 2003-09-30 devnull 	r.max.x -= n;
 59 76193d7c 2003-09-30 devnull 	r.max.y -= n;
 60 76193d7c 2003-09-30 devnull 	return r;
 61 76193d7c 2003-09-30 devnull }
 62 76193d7c 2003-09-30 devnull 
 63 76193d7c 2003-09-30 devnull Point
 64 76193d7c 2003-09-30 devnull divpt(Point a, int b)
 65 76193d7c 2003-09-30 devnull {
 66 76193d7c 2003-09-30 devnull 	a.x /= b;
 67 76193d7c 2003-09-30 devnull 	a.y /= b;
 68 76193d7c 2003-09-30 devnull 	return a;
 69 76193d7c 2003-09-30 devnull }
 70 76193d7c 2003-09-30 devnull 
 71 76193d7c 2003-09-30 devnull Point
 72 76193d7c 2003-09-30 devnull mulpt(Point a, int b)
 73 76193d7c 2003-09-30 devnull {
 74 76193d7c 2003-09-30 devnull 	a.x *= b;
 75 76193d7c 2003-09-30 devnull 	a.y *= b;
 76 76193d7c 2003-09-30 devnull 	return a;
 77 76193d7c 2003-09-30 devnull }
 78 76193d7c 2003-09-30 devnull 
 79 76193d7c 2003-09-30 devnull Rectangle
 80 76193d7c 2003-09-30 devnull rectsubpt(Rectangle r, Point p)
 81 76193d7c 2003-09-30 devnull {
 82 76193d7c 2003-09-30 devnull 	r.min.x -= p.x;
 83 76193d7c 2003-09-30 devnull 	r.min.y -= p.y;
 84 76193d7c 2003-09-30 devnull 	r.max.x -= p.x;
 85 76193d7c 2003-09-30 devnull 	r.max.y -= p.y;
 86 76193d7c 2003-09-30 devnull 	return r;
 87 76193d7c 2003-09-30 devnull }
 88 76193d7c 2003-09-30 devnull 
 89 76193d7c 2003-09-30 devnull Rectangle
 90 76193d7c 2003-09-30 devnull rectaddpt(Rectangle r, Point p)
 91 76193d7c 2003-09-30 devnull {
 92 76193d7c 2003-09-30 devnull 	r.min.x += p.x;
 93 76193d7c 2003-09-30 devnull 	r.min.y += p.y;
 94 76193d7c 2003-09-30 devnull 	r.max.x += p.x;
 95 76193d7c 2003-09-30 devnull 	r.max.y += p.y;
 96 76193d7c 2003-09-30 devnull 	return r;
 97 76193d7c 2003-09-30 devnull }
 98 76193d7c 2003-09-30 devnull 
 99 76193d7c 2003-09-30 devnull int
100 76193d7c 2003-09-30 devnull eqpt(Point p, Point q)
101 76193d7c 2003-09-30 devnull {
102 76193d7c 2003-09-30 devnull 	return p.x==q.x && p.y==q.y;
103 76193d7c 2003-09-30 devnull }
104 76193d7c 2003-09-30 devnull 
105 76193d7c 2003-09-30 devnull int
106 76193d7c 2003-09-30 devnull eqrect(Rectangle r, Rectangle s)
107 76193d7c 2003-09-30 devnull {
108 76193d7c 2003-09-30 devnull 	return r.min.x==s.min.x && r.max.x==s.max.x &&
109 76193d7c 2003-09-30 devnull 	       r.min.y==s.min.y && r.max.y==s.max.y;
110 76193d7c 2003-09-30 devnull }
111 76193d7c 2003-09-30 devnull 
112 76193d7c 2003-09-30 devnull int
113 76193d7c 2003-09-30 devnull rectXrect(Rectangle r, Rectangle s)
114 76193d7c 2003-09-30 devnull {
115 76193d7c 2003-09-30 devnull 	return r.min.x<s.max.x && s.min.x<r.max.x &&
116 76193d7c 2003-09-30 devnull 	       r.min.y<s.max.y && s.min.y<r.max.y;
117 76193d7c 2003-09-30 devnull }
118 76193d7c 2003-09-30 devnull 
119 76193d7c 2003-09-30 devnull int
120 76193d7c 2003-09-30 devnull rectinrect(Rectangle r, Rectangle s)
121 76193d7c 2003-09-30 devnull {
122 76193d7c 2003-09-30 devnull 	return s.min.x<=r.min.x && r.max.x<=s.max.x && s.min.y<=r.min.y && r.max.y<=s.max.y;
123 76193d7c 2003-09-30 devnull }
124 76193d7c 2003-09-30 devnull 
125 76193d7c 2003-09-30 devnull int
126 76193d7c 2003-09-30 devnull ptinrect(Point p, Rectangle r)
127 76193d7c 2003-09-30 devnull {
128 76193d7c 2003-09-30 devnull 	return p.x>=r.min.x && p.x<r.max.x &&
129 76193d7c 2003-09-30 devnull 	       p.y>=r.min.y && p.y<r.max.y;
130 76193d7c 2003-09-30 devnull }
131 76193d7c 2003-09-30 devnull 
132 76193d7c 2003-09-30 devnull Rectangle
133 76193d7c 2003-09-30 devnull canonrect(Rectangle r)
134 76193d7c 2003-09-30 devnull {
135 76193d7c 2003-09-30 devnull 	int t;
136 76193d7c 2003-09-30 devnull 	if (r.max.x < r.min.x) {
137 76193d7c 2003-09-30 devnull 		t = r.min.x;
138 76193d7c 2003-09-30 devnull 		r.min.x = r.max.x;
139 76193d7c 2003-09-30 devnull 		r.max.x = t;
140 76193d7c 2003-09-30 devnull 	}
141 76193d7c 2003-09-30 devnull 	if (r.max.y < r.min.y) {
142 76193d7c 2003-09-30 devnull 		t = r.min.y;
143 76193d7c 2003-09-30 devnull 		r.min.y = r.max.y;
144 76193d7c 2003-09-30 devnull 		r.max.y = t;
145 76193d7c 2003-09-30 devnull 	}
146 76193d7c 2003-09-30 devnull 	return r;
147 76193d7c 2003-09-30 devnull }
148 76193d7c 2003-09-30 devnull 
149 76193d7c 2003-09-30 devnull void
150 76193d7c 2003-09-30 devnull combinerect(Rectangle *r1, Rectangle r2)
151 76193d7c 2003-09-30 devnull {
152 76193d7c 2003-09-30 devnull 	if(r1->min.x > r2.min.x)
153 76193d7c 2003-09-30 devnull 		r1->min.x = r2.min.x;
154 76193d7c 2003-09-30 devnull 	if(r1->min.y > r2.min.y)
155 76193d7c 2003-09-30 devnull 		r1->min.y = r2.min.y;
156 76193d7c 2003-09-30 devnull 	if(r1->max.x < r2.max.x)
157 76193d7c 2003-09-30 devnull 		r1->max.x = r2.max.x;
158 76193d7c 2003-09-30 devnull 	if(r1->max.y < r2.max.y)
159 76193d7c 2003-09-30 devnull 		r1->max.y = r2.max.y;
160 76193d7c 2003-09-30 devnull }
161 76193d7c 2003-09-30 devnull 
162 76193d7c 2003-09-30 devnull u32int
163 76193d7c 2003-09-30 devnull drawld2chan[] = {
164 76193d7c 2003-09-30 devnull 	GREY1,
165 76193d7c 2003-09-30 devnull 	GREY2,
166 76193d7c 2003-09-30 devnull 	GREY4,
167 76193d7c 2003-09-30 devnull 	CMAP8,
168 76193d7c 2003-09-30 devnull };
169 76193d7c 2003-09-30 devnull 
170 76193d7c 2003-09-30 devnull u32int
171 76193d7c 2003-09-30 devnull setalpha(u32int color, uchar alpha)
172 76193d7c 2003-09-30 devnull {
173 76193d7c 2003-09-30 devnull 	int red, green, blue;
174 76193d7c 2003-09-30 devnull 
175 76193d7c 2003-09-30 devnull 	red = (color >> 3*8) & 0xFF;
176 76193d7c 2003-09-30 devnull 	green = (color >> 2*8) & 0xFF;
177 76193d7c 2003-09-30 devnull 	blue = (color >> 1*8) & 0xFF;
178 76193d7c 2003-09-30 devnull 	/* ignore incoming alpha */
179 76193d7c 2003-09-30 devnull 	red = (red * alpha)/255;
180 76193d7c 2003-09-30 devnull 	green = (green * alpha)/255;
181 76193d7c 2003-09-30 devnull 	blue = (blue * alpha)/255;
182 76193d7c 2003-09-30 devnull 	return (red<<3*8) | (green<<2*8) | (blue<<1*8) | (alpha<<0*8);
183 76193d7c 2003-09-30 devnull }
184 76193d7c 2003-09-30 devnull 
185 76193d7c 2003-09-30 devnull Point	ZP;
186 76193d7c 2003-09-30 devnull Rectangle ZR;
187 76193d7c 2003-09-30 devnull int
188 76193d7c 2003-09-30 devnull Rfmt(Fmt *f)
189 76193d7c 2003-09-30 devnull {
190 76193d7c 2003-09-30 devnull 	Rectangle r;
191 76193d7c 2003-09-30 devnull 
192 76193d7c 2003-09-30 devnull 	r = va_arg(f->args, Rectangle);
193 76193d7c 2003-09-30 devnull 	return fmtprint(f, "%P %P", r.min, r.max);
194 76193d7c 2003-09-30 devnull }
195 76193d7c 2003-09-30 devnull 
196 76193d7c 2003-09-30 devnull int
197 76193d7c 2003-09-30 devnull Pfmt(Fmt *f)
198 76193d7c 2003-09-30 devnull {
199 76193d7c 2003-09-30 devnull 	Point p;
200 76193d7c 2003-09-30 devnull 
201 76193d7c 2003-09-30 devnull 	p = va_arg(f->args, Point);
202 76193d7c 2003-09-30 devnull 	return fmtprint(f, "[%d %d]", p.x, p.y);
203 76193d7c 2003-09-30 devnull }