shithub: dporg

Download patch

ref: d720781005fff71800333afec5f574ccd770edea
parent: 006f3116af711aeea7331515f92384c9fe518368
author: qwx <qwx@sciops.net>
date: Mon Apr 26 13:04:52 EDT 2021 

add basic drawing


--- a/dat.h
+++ b/dat.h
@@ -3,6 +3,14 @@
 extern char *prefix;
 
 enum{
+	Vwidth = 320,
+	Vheight = 210,
+};
+
+extern int npal;
+extern u32int *pal;
+
+enum{
 	PCfont,
 	PCarrow,
 	PCspace,
--- a/dporg.c
+++ b/dporg.c
@@ -9,6 +9,29 @@
 
 char *prefix = "/sys/games/lib/dporg";
 
+enum{
+	Kfire = 'x',
+	K↑ = Kup,
+	K↓ = Kdown,
+	K← = Kleft,
+	K→ = Kright,
+};
+
+static Keyboardctl *kc;
+static Mousectl *mc;
+
+int
+max(int a, int b)
+{
+	return a > b ? a : b;
+}
+
+int
+min(int a, int b)
+{
+	return a < b ? a : b;
+}
+
 void *
 erealloc(void *p, ulong n, ulong oldn)
 {
@@ -34,7 +57,7 @@
 static void
 usage(void)
 {
-	fprint(2, "usage: %s [-d datadir]\n", argv0);
+	fprint(2, "usage: %s [-m datadir]\n", argv0);
 	threadexits("usage");
 }
 
@@ -41,12 +64,54 @@
 void
 threadmain(int argc, char **argv)
 {
+	Rune r;
+	Mouse mo;
+
 	ARGBEGIN{
-	case 'd': prefix = EARGF(usage()); break;
+	case 'm': prefix = EARGF(usage()); break;
 	default: usage();
 	}ARGEND
-	if(initdraw(nil, nil, "dporg") < 0)
-		sysfatal("initdraw: %r");
 	initfs();
-	threadexits(nil);
+	initfb();
+	if((kc = initkeyboard(nil)) == nil)
+		sysfatal("initkeyboard: %r");
+	if((mc = initmouse(nil, screen)) == nil)
+		sysfatal("initmouse: %r");
+	initfsm();
+	enum{
+		Aresize,
+		Amouse,
+		Akbd,
+	};
+	Alt a[] = {
+		{mc->resizec, nil, CHANRCV},
+		{mc->c, &mc->Mouse, CHANRCV},
+		{kc->c, &r, CHANRCV},
+		{nil, nil, CHANEND}
+	};
+	for(;;){
+		switch(alt(a)){
+		case Aresize:
+			if(getwindow(display, Refnone) < 0)
+				sysfatal("resize failed: %r");
+			mo = mc->Mouse;
+			resetfb(1);
+			break;
+		case Amouse:
+			if(eqpt(mo.xy, ZP))
+				mo = mc->Mouse;
+			break;
+		case Akbd:
+			switch(r){
+			case Kdel:
+			case 'q': threadexitsall(nil);
+			case Kfire: break;
+			case K↑: break;
+			case K↓: break;
+			case K←: break;
+			case K→: break;
+			}
+			break;
+		}
+	}
 }
--- /dev/null
+++ b/drw.c
@@ -1,0 +1,102 @@
+#include <u.h>
+#include <libc.h>
+#include <draw.h>
+#include "dat.h"
+#include "fns.h"
+
+static u32int fb[Vwidth * Vheight];
+
+int npal;
+u32int *pal;
+Pic pics[PCend];
+
+static int scale, fbsz;
+static Rectangle fbsr;
+static Image *fbs;
+static u32int *fbsbuf;
+
+static void
+drawscaled(void)
+{
+	u32int *s, *p, v;
+
+	s = fb;
+	p = fbsbuf;
+	while(s < fb + nelem(fb)){
+		v = *s++;
+		switch(scale){
+		case 12: *p++ = v;
+		case 11: *p++ = v;
+		case 10: *p++ = v;
+		case 9: *p++ = v;
+		case 8: *p++ = v;
+		case 7: *p++ = v;
+		case 6: *p++ = v;
+		case 5: *p++ = v;
+		case 4: *p++ = v;
+		case 3: *p++ = v;
+		case 2: *p++ = v; *p++ = v;
+		}
+	}
+}
+
+void
+drawfb(void)
+{
+	uchar *p;
+	Rectangle r;
+
+	if(scale == 1){
+		loadimage(fbs, fbs->r, (uchar*)fb, fbsz);
+		draw(screen, fbsr, fbs, nil, ZP);
+	}else{
+		drawscaled();
+		p = (uchar*)fbsbuf;
+		r = fbsr;
+		while(r.min.y < fbsr.max.y){
+			r.max.y = r.min.y + scale;
+			p += loadimage(fbs, fbs->r, p, fbsz / Vheight);
+			draw(screen, r, fbs, nil, ZP);
+			r.min.y = r.max.y;
+		}
+	}
+	flushimage(display, 1);
+}
+
+void
+resetfb(int paint)
+{
+	Point o, p;
+
+	scale = min(Dx(screen->r) / Vwidth, Dy(screen->r) / Vheight);
+	if(scale <= 0)
+		scale = 1;
+	else if(scale > 12)
+		scale = 12;
+	o = divpt(addpt(screen->r.min, screen->r.max), 2);
+	p = Pt(Vwidth / 2 * scale, Vheight / 2 * scale);
+	fbsr = Rpt(subpt(o, p), addpt(o, p));
+	fbsz = Vwidth * Vheight * scale * sizeof *fbsbuf;
+	freeimage(fbs);
+	if((fbs = allocimage(display, Rect(0,0,Vwidth*scale,scale==1? Vheight : 1),
+		XRGB32, scale > 1, DBlack)) == nil)
+		sysfatal("allocimage: %r");
+	free(fbsbuf);
+	fbsbuf = nil;
+	if(scale != 1)
+		fbsbuf = emalloc(fbsz);
+	draw(screen, screen->r, display->black, nil, ZP);
+	if(paint)
+		drawfb();
+	else
+		flushimage(display, 1);
+}
+
+void
+initfb(void)
+{
+	if(initdraw(nil, nil, "dporg") < 0)
+		sysfatal("initdraw: %r");
+	loadpics();
+	resetfb(0);
+}
--- a/fns.h
+++ b/fns.h
@@ -1,3 +1,11 @@
+void	initfsm(void);
+void	drawfb(void);
+void	resetfb(int);
+void	initfb(void);
+void	loadimg(void);
+void	loadpics(void);
 void	initfs(void);
+int	max(int, int);
+int	min(int, int);
 void*	erealloc(void*, ulong, ulong);
 void*	emalloc(ulong);
--- a/fs.c
+++ b/fs.c
@@ -6,9 +6,6 @@
 #include "fns.h"
 
 s32int sintab[256];
-int npal;
-u32int *pal;
-Pic pics[PCend];
 
 static Biobuf *
 eopen(char *s, int mode)
@@ -99,7 +96,7 @@
 	free(b);
 }
 
-static void
+void
 loadpics(void)
 {
 	loadpic("a.bit", pics + PCfont);
@@ -162,7 +159,6 @@
 		fprint(2, "initfs: %r\n");
 	loadsintab();
 	loadpal();
-	loadpics();
 }
 
 // grids: 32/256/2048
--- /dev/null
+++ b/fsm.c
@@ -1,0 +1,10 @@
+#include <u.h>
+#include <libc.h>
+#include "dat.h"
+#include "fns.h"
+
+void
+initfsm(void)
+{	
+	srand(time(nil));
+}
--- a/mkfile
+++ b/mkfile
@@ -4,6 +4,8 @@
 OFILES=\
 	fs.$O\
 	dporg.$O\
+	drw.$O\
+	fsm.$O\
 
 HFILES= dat.h fns.h
 </sys/src/cmd/mkone