demote libemu to common code

- too small, nothing else that won't be under /games will use it
- "libemu" as a name doesn't make sense here

sys/man/2/emu

@@ -1,137 +0,0 @@
-.TH EMU 2
-.SH NAME
-initemu, regkeyfn, flushmouse, flushscreen, flushaudio, screenwipe \- graphical emulator-like software scaffolding
-.SH SYNOPSIS
-.nf
-.ft L
-#include <u.h>
-#include <libc.h>
-#include <emu.h>
-.PP
-.ta +\w'\fLvoid fP'u
-.B
-void	flushmouse(int discard);
-.PP
-.B
-void	flushscreen(void);
-.PP
-.B
-void	flushaudio(int (*fn)(void));
-.PP
-.B
-void	regkeyfn(Rune r, void (*fn)(void));
-.PP
-.B
-void	regkey(char *joyk, Rune r, int k);
-.PP
-.B
-void	initemu(int dx, int dy, int bpp, ulong chan,
-.B
-	   int dokey, void(*kproc)(void*));
-.SH DESCRIPTION
-.I Libemu
-implements common user interfaces for programs controlled
-with a joypad or a limited number of keys.
-.PP
-.B initemu
-initializes the display for the given internal screen size
-.B dx
-by
-.B dy
-and
-.B bpp
-bit depth.
-.B Chan
-is an
-.B Image
-pixel format descriptor to be used for an internal framebuffer (see
-.IR draw (2)).
-.PP
-If
-.B dokey
-is true,
-a keyboard process is started which sets a 64-bit wide bit vector for input keys.
-.PP
-Keys are set via
-.B regkey.
-Pressing the key corresponding to the
-.B r
-rune, or writing
-.B joyk
-to standard in will
-.L OR
-.B k
-with the key bit vector.
-.PP
-.B Regkeyfn
-registers an additional rune and a callback for the keyboard process.
-.PP
-Normally, a joypad process is also started, and parses standard input for key presses.
-If
-.B dokey
-is false, only the joypad process will be started.
-If
-.B kproc
-is a valid function pointer,
-it will be used for keyboard processing instead of the library-provided one,
-and no joypad process will be started.
-.PP
-.IP
-.EX
-.ta 6n
-uchar *pic;
-.EE
-.PP
-Once
-.B initemu
-is called, a framebuffer of the specifized size is allocated,
-and may be accessed via
-.BR pic .
-.L Libemu
-scales the framebuffer to fit the greatest multiple of the framebuffer's
-width in the window.
-The scaling is horizontal only and needs to be taken into account for drawing
-within the program.
-.PP
-Typically, mouse event handling is followed by drawing the final image from the
-internal framebuffer render and writing a constant amount of audio samples,
-thereby synchronizing the program's framerate to the audio writes.
-.IP
-.EX
-.ta 6n
-Mouse m;
-extern Mousectl *mc;
-
-flushmouse(0);
-while(nbrecv(mc->c, &m) > 0){
-	...
-}
-flushscreen();
-flushaudio(audioout);
-.EE
-.PP
-Besides window resizing, mouse events are discarded by default.
-If
-.B discard
-is false
-.B flushmouse
-will let the user program handle mouse events prior to flushing the screen (see 
-.BR event (2)).
-.PP
-.B Flushscreen
-handles re-scaling and re-allocating the buffers used, as well as drawing to
-the screen, either directly, or by duplicating pre-scaled scanlines.
-.SH SOURCE
-.B /sys/src/libemu
-.SH "SEE ALSO"
-.IR draw (2),
-.IR event (2)
-.SH BUGS
-The semantics for
-.B initemu
-input selection are confusing.
-.PP
-A greater effort should be made to simplify automatic scaling for user programs.
-.SH HISTORY
-.I Libemu
-first appeared in 9front in May, 2018.

sys/src/games/2600/2600.c

@@ -3,7 +3,7 @@
 #include <thread.h>
 #include <draw.h>
 #include <keyboard.h>
-#include <emu.h>
+#include "../eui.h"
 #include "dat.h"
 #include "fns.h"
 

sys/src/games/2600/cpu.c

@@ -1,6 +1,6 @@
 #include <u.h>
 #include <libc.h>
-#include <emu.h>
+#include "../eui.h"
 #include "dat.h"
 #include "fns.h"
 

sys/src/games/2600/mem.c

@@ -1,6 +1,6 @@
 #include <u.h>
 #include <libc.h>
-#include <emu.h>
+#include "../eui.h"
 #include "dat.h"
 #include "fns.h"
 

sys/src/games/2600/mkfile

@@ -8,7 +8,10 @@ OFILES=\
 	cpu.$O\
 	mem.$O\
 	tia.$O\
+	eui.$O\
 
 HFILES=dat.h fns.h
 
 </sys/src/cmd/mkone
+eui.$O: ../eui.c
+	$CC $CFLAGS ../eui.c

sys/src/games/2600/tia.c

@@ -1,6 +1,6 @@
 #include <u.h>
 #include <libc.h>
-#include <emu.h>
+#include "../eui.h"
 #include "dat.h"
 #include "fns.h"
 

sys/src/games/c64/c64.c

@@ -4,7 +4,7 @@
 #include <draw.h>
 #include <mouse.h>
 #include <keyboard.h>
-#include <emu.h>
+#include "../eui.h"
 #include "dat.h"
 #include "fns.h"
 

sys/src/games/c64/cpu.c

@@ -1,6 +1,6 @@
 #include <u.h>
 #include <libc.h>
-#include <emu.h>
+#include "../eui.h"
 #include "dat.h"
 #include "fns.h"
 

sys/src/games/c64/mem.c

@@ -1,7 +1,7 @@
 #include <u.h>
 #include <libc.h>
 #include <thread.h>
-#include <emu.h>
+#include "../eui.h"
 #include "dat.h"
 #include "fns.h"
 

sys/src/games/c64/mkfile

@@ -7,7 +7,10 @@ OFILES=\
 	cpu.$O\
 	mem.$O\
 	vic.$O\
-	
+	eui.$O\
+
 HFILES=dat.h fns.h
 
 </sys/src/cmd/mkone
+eui.$O: ../eui.c
+	$CC $CFLAGS ../eui.c

sys/src/games/c64/vic.c

@@ -1,7 +1,7 @@
 #include <u.h>
 #include <libc.h>
 #include <thread.h>
-#include <emu.h>
+#include "../eui.h"
 #include "dat.h"
 #include "fns.h"
 

sys/src/games/eui.c

@@ -4,7 +4,7 @@
 #include <draw.h>
 #include <keyboard.h>
 #include <mouse.h>
-#include <emu.h>
+#include "eui.h"
 
 typedef struct Kfn Kfn;
 

sys/src/games/eui.h

@@ -0,0 +1,19 @@
+enum{
+	MILLION = 1000000,
+	BILLION = 1000000000,
+};
+
+extern u64int keys, keys2;
+extern int trace, paused;
+extern int savereq, loadreq;
+extern QLock pauselock;
+extern int scale, warp10;
+extern uchar *pic;
+
+void*	emalloc(ulong);
+void	flushmouse(int);
+void	flushscreen(void);
+void	flushaudio(int(*)(void));
+void	regkeyfn(Rune, void(*)(void));
+void	regkey(char*, Rune, int);
+void	initemu(int, int, int, ulong, int, void(*)(void*));

sys/src/games/gb/apu.c

@@ -1,7 +1,7 @@
 #include <u.h>
 #include <libc.h>
 #include <thread.h>
-#include <emu.h>
+#include "../eui.h"
 #include "dat.h"
 #include "fns.h"
 

sys/src/games/gb/cpu.c

@@ -1,7 +1,7 @@
 #include <u.h>
 #include <libc.h>
 #include <thread.h>
-#include <emu.h>
+#include "../eui.h"
 #include "dat.h"
 #include "fns.h"
 

sys/src/games/gb/gb.c

@@ -3,7 +3,7 @@
 #include <thread.h>
 #include <draw.h>
 #include <keyboard.h>
-#include <emu.h>
+#include "../eui.h"
 #include "dat.h"
 #include "fns.h"
 

sys/src/games/gb/mem.c

@@ -1,7 +1,7 @@
 #include <u.h>
 #include <libc.h>
 #include <thread.h>
-#include <emu.h>
+#include "../eui.h"
 #include "dat.h"
 #include "fns.h"
 

sys/src/games/gb/mkfile

@@ -10,7 +10,10 @@ OFILES=\
 	ev.$O\
 	state.$O\
 	apu.$O\
+	eui.$O\
 
 HFILES=dat.h fns.h
 
 </sys/src/cmd/mkone
+eui.$O: ../eui.c
+	$CC $CFLAGS ../eui.c

sys/src/games/gb/ppu.c

@@ -1,7 +1,7 @@
 #include <u.h>
 #include <libc.h>
 #include <thread.h>
-#include <emu.h>
+#include "../eui.h"
 #include "dat.h"
 #include "fns.h"
 

sys/src/games/gba/apu.c

@@ -1,7 +1,7 @@
 #include <u.h>
 #include <libc.h>
 #include <thread.h>
-#include <emu.h>
+#include "../eui.h"
 #include "dat.h"
 #include "fns.h"
 

sys/src/games/gba/cpu.c

@@ -1,7 +1,7 @@
 #include <u.h>
 #include <libc.h>
 #include <thread.h>
-#include <emu.h>
+#include "../eui.h"
 #include "dat.h"
 #include "fns.h"
 

sys/src/games/gba/gba.c

@@ -3,7 +3,7 @@
 #include <thread.h>
 #include <draw.h>
 #include <keyboard.h>
-#include <emu.h>
+#include "../eui.h"
 #include "dat.h"
 #include "fns.h"
 

sys/src/games/gba/mem.c

@@ -1,7 +1,7 @@
 #include <u.h>
 #include <libc.h>
 #include <thread.h>
-#include <emu.h>
+#include "../eui.h"
 #include "dat.h"
 #include "fns.h"
 

sys/src/games/gba/mkfile

@@ -10,7 +10,10 @@ OFILES=\
 	ev.$O\
 	apu.$O\
 	state.$O\
+	eui.$O\
 
 HFILES=dat.h fns.h
 
 </sys/src/cmd/mkone
+eui.$O: ../eui.c
+	$CC $CFLAGS ../eui.c

sys/src/games/gba/ppu.c

@@ -1,7 +1,7 @@
 #include <u.h>
 #include <libc.h>
 #include <thread.h>
-#include <emu.h>
+#include "../eui.h"
 #include "dat.h"
 #include "fns.h"
 

sys/src/games/md/cpu.c

@@ -1,7 +1,7 @@
 #include <u.h>
 #include <libc.h>
 #include <thread.h>
-#include <emu.h>
+#include "../eui.h"
 #include "dat.h"
 #include "fns.h"
 

sys/src/games/md/md.c

@@ -3,7 +3,7 @@
 #include <thread.h>
 #include <draw.h>
 #include <keyboard.h>
-#include <emu.h>
+#include "../eui.h"
 #include "dat.h"
 #include "fns.h"
 

sys/src/games/md/mem.c

@@ -1,7 +1,7 @@
 #include <u.h>
 #include <libc.h>
 #include <thread.h>
-#include <emu.h>
+#include "../eui.h"
 #include "dat.h"
 #include "fns.h"
 

sys/src/games/md/mkfile

@@ -9,7 +9,10 @@ OFILES=\
 	vdp.$O\
 	z80.$O\
 	ym.$O\
+	eui.$O\
 
 HFILES=dat.h fns.h
 
 </sys/src/cmd/mkone
+eui.$O: ../eui.c
+	$CC $CFLAGS ../eui.c

sys/src/games/md/vdp.c

@@ -1,7 +1,7 @@
 #include <u.h>
 #include <libc.h>
 #include <thread.h>
-#include <emu.h>
+#include "../eui.h"
 #include "dat.h"
 #include "fns.h"
 

sys/src/games/md/ym.c

@@ -1,7 +1,7 @@
 #include <u.h>
 #include <libc.h>
 #include <thread.h>
-#include <emu.h>
+#include "../eui.h"
 #include "dat.h"
 #include "fns.h"
 

sys/src/games/nes/apu.c

@@ -2,7 +2,7 @@
 #include <libc.h>
 #include <thread.h>
 #include <draw.h>
-#include <emu.h>
+#include "../eui.h"
 #include "dat.h"
 #include "fns.h"
 

sys/src/games/nes/mem.c

@@ -2,7 +2,7 @@
 #include <libc.h>
 #include <thread.h>
 #include <draw.h>
-#include <emu.h>
+#include "../eui.h"
 #include "dat.h"
 #include "fns.h"
 

sys/src/games/nes/mkfile

@@ -9,7 +9,10 @@ OFILES=\
 	ppu.$O\
 	state.$O\
 	apu.$O\
+	eui.$O\
 	
 HFILES=dat.h fns.h
 
 </sys/src/cmd/mkone
+eui.$O: ../eui.c
+	$CC $CFLAGS ../eui.c

sys/src/games/nes/nes.c

@@ -3,7 +3,7 @@
 #include <draw.h>
 #include <thread.h>
 #include <keyboard.h>
-#include <emu.h>
+#include "../eui.h"
 #include "dat.h"
 #include "fns.h"
 

sys/src/games/nes/ppu.c

@@ -3,7 +3,7 @@
 #include <thread.h>
 #include <draw.h>
 #include <mouse.h>
-#include <emu.h>
+#include "../eui.h"
 #include "dat.h"
 #include "fns.h"
 

sys/src/games/snes/cpu.c

@@ -1,7 +1,7 @@
 #include <u.h>
 #include <libc.h>
 #include <thread.h>
-#include <emu.h>
+#include "../eui.h"
 #include "dat.h"
 #include "fns.h"
 

sys/src/games/snes/dsp.c

@@ -1,7 +1,7 @@
 #include <u.h>
 #include <libc.h>
 #include <thread.h>
-#include <emu.h>
+#include "../eui.h"
 #include "dat.h"
 #include "fns.h"
 

sys/src/games/snes/mem.c

@@ -1,7 +1,7 @@
 #include <u.h>
 #include <libc.h>
 #include <thread.h>
-#include <emu.h>
+#include "../eui.h"
 #include "dat.h"
 #include "fns.h"
 

sys/src/games/snes/mkfile

@@ -10,7 +10,10 @@ OFILES=\
 	spc.$O\
 	dsp.$O\
 	state.$O\
+	eui.$O\
 
 HFILES=dat.h fns.h
 
 </sys/src/cmd/mkone
+eui.$O: ../eui.c
+	$CC $CFLAGS ../eui.c

sys/src/games/snes/ppu.c

@@ -1,7 +1,7 @@
 #include <u.h>
 #include <libc.h>
 #include <thread.h>
-#include <emu.h>
+#include "../eui.h"
 #include "dat.h"
 #include "fns.h"
 

sys/src/games/snes/snes.c

@@ -4,7 +4,7 @@
 #include <draw.h>
 #include <keyboard.h>
 #include <mouse.h>
-#include <emu.h>
+#include "../eui.h"
 #include "dat.h"
 #include "fns.h"
 

sys/src/games/snes/spc.c

@@ -1,7 +1,7 @@
 #include <u.h>
 #include <libc.h>
 #include <thread.h>
-#include <emu.h>
+#include "../eui.h"
 #include "dat.h"
 #include "fns.h"
 

sys/src/libemu/mkfile

@@ -1,20 +0,0 @@
-</$objtype/mkfile
-
-LIB=/$objtype/lib/libemu.a
-
-OFILES=\
-	emu.$O\
-
-HFILES=\
-	/sys/include/draw.h\
-	/sys/include/emu.h\
-	/sys/include/mouse.h\
-	/sys/include/keyboard.h
-
-UPDATE=\
-	mkfile\
-	$HFILES\
-	${OFILES:%.$O=%.c}\
-	${LIB:/$objtype/%=/386/%}\
-
-</sys/src/cmd/mksyslib