From 4f5035ffa4e67beba5489cf8a23f02c872595ed2 Mon Sep 17 00:00:00 2001
From: rodri <rgl@antares-labs.eu>
Date: Tue, 16 Jun 2020 15:15:10 +0000
Subject: started work on zooming and a textual hud.

---
 dat.h   | 27 +++++++++++++++++++++++++++
 fns.h   |  1 +
 main.c  | 23 +++++++++++++----------
 utils.c |  6 ++++++
 4 files changed, 47 insertions(+), 10 deletions(-)

diff --git a/dat.h b/dat.h
index ce1cd64..8e42349 100644
--- a/dat.h
+++ b/dat.h
@@ -1,5 +1,18 @@
+/* palette colors */
+enum {
+	PCBlack,
+	PCWhite,
+	NCOLOR
+};
+
+enum {
+	MAXZOOM = 8
+};
+
 typedef struct Layer Layer;
 typedef struct Canvas Canvas;
+typedef struct HUD HUD;
+typedef struct HUDWidget HUDWidget;
 
 struct Layer
 {
@@ -17,3 +30,17 @@ struct Canvas
 	Layer layers;
 	Layer *curlayer;
 };
+
+struct HUD
+{
+	Point2 p;
+	HUDWidget *widgets;
+};
+
+struct HUDWidget
+{
+	Point2 p;
+	char *fmt;
+	va_arg va;
+	HUDWidget *next;
+};
diff --git a/fns.h b/fns.h
index fe9ca4f..5152daa 100644
--- a/fns.h
+++ b/fns.h
@@ -14,5 +14,6 @@ Layer *newlayer(char*, Rectangle, ulong);
 void rmlayer(Layer*);
 
 /* utils */
+int clamp(int, int, int);
 double fclamp(double, double, double);
 int alphachan(ulong);
diff --git a/main.c b/main.c
index 649be92..3d5d8b5 100644
--- a/main.c
+++ b/main.c
@@ -8,18 +8,12 @@
 #include "dat.h"
 #include "fns.h"
 
-/* palette colors */
-enum {
-	PCBlack,
-	PCWhite,
-	NCOLOR
-};
-
 RFrame worldrf;
-Image *pal[NCOLOR];
 Image *background;
 Canvas *curcanvas;
 Image *brushcolor;
+Image *pal[NCOLOR];
+int zoom = 1;
 
 void resized(void);
 
@@ -252,8 +246,7 @@ lmb(Mousectl *mc, Keyboardctl *)
 		p = Pt(mpos.x,mpos.y);
 		if(eqpt(p, oldp))
 			continue;
-		//draw(curcanvas->curlayer->image, rectaddpt(r, p), brushcolor, nil, ZP);
-		line(curcanvas->curlayer->image, oldp, p, Enddisc, Enddisc, 0, brushcolor, ZP);
+		line(curcanvas->curlayer->image, oldp, p, Endsquare, Endsquare, 0, brushcolor, ZP);
 		redraw();
 	}
 }
@@ -267,6 +260,10 @@ mouse(Mousectl *mc, Keyboardctl *kc)
 		mmb(mc, kc);
 	if((mc->buttons&4) != 0)
 		rmb(mc, kc);
+	if((mc->buttons&8) != 0)
+		zoom = clamp(++zoom, 0, MAXZOOM);
+	if((mc->buttons&16) != 0)
+		zoom = clamp(--zoom, 0, MAXZOOM);
 }
 
 void
@@ -276,6 +273,12 @@ key(Rune r)
 	case Kdel:
 	case 'q':
 		threadexitsall(nil);
+	case '+':
+		zoom = clamp(++zoom, 0, MAXZOOM);
+		break;
+	case '-':
+		zoom = clamp(--zoom, 0, MAXZOOM);
+		break;
 	}
 }
 
diff --git a/utils.c b/utils.c
index 4f75298..4813da5 100644
--- a/utils.c
+++ b/utils.c
@@ -2,6 +2,12 @@
 #include <libc.h>
 #include <draw.h>
 
+int
+clamp(int n, int min, int max)
+{
+	return n < min? min: n > max? max: n;
+}
+
 double
 fclamp(double n, double min, double max)
 {
-- 
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