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

44 files changed, 75 insertions, 192 deletions

diff --git a/sys/man/2/emu b/sys/man/2/emu
deleted file mode 100644
index 68026416b..000000000
--- a/sys/man/2/emu
+++ /dev/null
@@ -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.
diff --git a/sys/src/games/2600/2600.c b/sys/src/games/2600/2600.c
index 38d7c856f..728401d89 100644
--- a/sys/src/games/2600/2600.c
+++ b/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"
 
diff --git a/sys/src/games/2600/cpu.c b/sys/src/games/2600/cpu.c
index 4dedfb9eb..66842f292 100644
--- a/sys/src/games/2600/cpu.c
+++ b/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"
 
diff --git a/sys/src/games/2600/mem.c b/sys/src/games/2600/mem.c
index be24a17e1..c521915b2 100644
--- a/sys/src/games/2600/mem.c
+++ b/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"
 
diff --git a/sys/src/games/2600/mkfile b/sys/src/games/2600/mkfile
index df08bd2d8..1b1657e07 100644
--- a/sys/src/games/2600/mkfile
+++ b/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
diff --git a/sys/src/games/2600/tia.c b/sys/src/games/2600/tia.c
index 3819fedaa..8c4902761 100644
--- a/sys/src/games/2600/tia.c
+++ b/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"
 
diff --git a/sys/src/games/c64/c64.c b/sys/src/games/c64/c64.c
index 9b4e0504b..2ca976fe7 100644
--- a/sys/src/games/c64/c64.c
+++ b/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"
 
diff --git a/sys/src/games/c64/cpu.c b/sys/src/games/c64/cpu.c
index cafd8e333..3a24e7783 100644
--- a/sys/src/games/c64/cpu.c
+++ b/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"
 
diff --git a/sys/src/games/c64/mem.c b/sys/src/games/c64/mem.c
index 8e00bec4b..6d0682b7a 100644
--- a/sys/src/games/c64/mem.c
+++ b/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"
 
diff --git a/sys/src/games/c64/mkfile b/sys/src/games/c64/mkfile
index af2ff2913..27d7f2641 100644
--- a/sys/src/games/c64/mkfile
+++ b/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
diff --git a/sys/src/games/c64/vic.c b/sys/src/games/c64/vic.c
index c181b2446..eba617843 100644
--- a/sys/src/games/c64/vic.c
+++ b/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"
 
diff --git a/sys/src/libemu/emu.c b/sys/src/games/eui.c
index 908727b75..d462c76d8 100644
--- a/sys/src/libemu/emu.c
+++ b/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;
 
diff --git a/sys/src/games/eui.h b/sys/src/games/eui.h
new file mode 100644
index 000000000..949cf7cb2
--- /dev/null
+++ b/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*));
diff --git a/sys/src/games/gb/apu.c b/sys/src/games/gb/apu.c
index dc78992ac..900f7e793 100644
--- a/sys/src/games/gb/apu.c
+++ b/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"
 
diff --git a/sys/src/games/gb/cpu.c b/sys/src/games/gb/cpu.c
index 81c45a034..bff692d02 100644
--- a/sys/src/games/gb/cpu.c
+++ b/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"
 
diff --git a/sys/src/games/gb/gb.c b/sys/src/games/gb/gb.c
index 55ced730a..b82729023 100644
--- a/sys/src/games/gb/gb.c
+++ b/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"
 
diff --git a/sys/src/games/gb/mem.c b/sys/src/games/gb/mem.c
index a6c6c7599..44a10820c 100644
--- a/sys/src/games/gb/mem.c
+++ b/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"
 
diff --git a/sys/src/games/gb/mkfile b/sys/src/games/gb/mkfile
index b9e767497..80f1d0110 100644
--- a/sys/src/games/gb/mkfile
+++ b/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
diff --git a/sys/src/games/gb/ppu.c b/sys/src/games/gb/ppu.c
index 389581621..433c12270 100644
--- a/sys/src/games/gb/ppu.c
+++ b/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"
 
diff --git a/sys/src/games/gba/apu.c b/sys/src/games/gba/apu.c
index 4858aced9..31c0f7682 100644
--- a/sys/src/games/gba/apu.c
+++ b/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"
 
diff --git a/sys/src/games/gba/cpu.c b/sys/src/games/gba/cpu.c
index a8354324f..e4f42542e 100644
--- a/sys/src/games/gba/cpu.c
+++ b/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"
 
diff --git a/sys/src/games/gba/gba.c b/sys/src/games/gba/gba.c
index 06e90b998..ec8c1bc7a 100644
--- a/sys/src/games/gba/gba.c
+++ b/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"
 
diff --git a/sys/src/games/gba/mem.c b/sys/src/games/gba/mem.c
index 032f35eae..c5a56abbb 100644
--- a/sys/src/games/gba/mem.c
+++ b/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"
 
diff --git a/sys/src/games/gba/mkfile b/sys/src/games/gba/mkfile
index b519b2376..0d12ae943 100644
--- a/sys/src/games/gba/mkfile
+++ b/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
diff --git a/sys/src/games/gba/ppu.c b/sys/src/games/gba/ppu.c
index 7de5a1e7b..b70aba8fb 100644
--- a/sys/src/games/gba/ppu.c
+++ b/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"
 
diff --git a/sys/src/games/md/cpu.c b/sys/src/games/md/cpu.c
index 1a0325f52..6a223c3b1 100644
--- a/sys/src/games/md/cpu.c
+++ b/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"
 
diff --git a/sys/src/games/md/md.c b/sys/src/games/md/md.c
index 557668dc7..2c0ed3fda 100644
--- a/sys/src/games/md/md.c
+++ b/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"
 
diff --git a/sys/src/games/md/mem.c b/sys/src/games/md/mem.c
index 083abaa29..323632d12 100644
--- a/sys/src/games/md/mem.c
+++ b/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"
 
diff --git a/sys/src/games/md/mkfile b/sys/src/games/md/mkfile
index b8363745a..7cad014fc 100644
--- a/sys/src/games/md/mkfile
+++ b/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
diff --git a/sys/src/games/md/vdp.c b/sys/src/games/md/vdp.c
index 51d5f20a1..b3b7553f8 100644
--- a/sys/src/games/md/vdp.c
+++ b/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"
 
diff --git a/sys/src/games/md/ym.c b/sys/src/games/md/ym.c
index ca3988433..6d6031958 100644
--- a/sys/src/games/md/ym.c
+++ b/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"
 
diff --git a/sys/src/games/nes/apu.c b/sys/src/games/nes/apu.c
index 52e8e36b5..1db370fde 100644
--- a/sys/src/games/nes/apu.c
+++ b/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"
 
diff --git a/sys/src/games/nes/mem.c b/sys/src/games/nes/mem.c
index 52e3162ba..cfa71a987 100644
--- a/sys/src/games/nes/mem.c
+++ b/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"
 
diff --git a/sys/src/games/nes/mkfile b/sys/src/games/nes/mkfile
index 98c8a14e0..d658229b4 100644
--- a/sys/src/games/nes/mkfile
+++ b/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
diff --git a/sys/src/games/nes/nes.c b/sys/src/games/nes/nes.c
index 2b4988aec..38984efff 100644
--- a/sys/src/games/nes/nes.c
+++ b/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"
 
diff --git a/sys/src/games/nes/ppu.c b/sys/src/games/nes/ppu.c
index 498c20082..0f7010198 100644
--- a/sys/src/games/nes/ppu.c
+++ b/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"
 
diff --git a/sys/src/games/snes/cpu.c b/sys/src/games/snes/cpu.c
index dbec220a4..7bdc95df9 100644
--- a/sys/src/games/snes/cpu.c
+++ b/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"
 
diff --git a/sys/src/games/snes/dsp.c b/sys/src/games/snes/dsp.c
index 991c45316..d3a03028f 100644
--- a/sys/src/games/snes/dsp.c
+++ b/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"
 
diff --git a/sys/src/games/snes/mem.c b/sys/src/games/snes/mem.c
index 885713a85..6afb3a9ef 100644
--- a/sys/src/games/snes/mem.c
+++ b/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"
 
diff --git a/sys/src/games/snes/mkfile b/sys/src/games/snes/mkfile
index 6171c70ac..6cd40ba38 100644
--- a/sys/src/games/snes/mkfile
+++ b/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
diff --git a/sys/src/games/snes/ppu.c b/sys/src/games/snes/ppu.c
index 5819e032c..cc1a82af8 100644
--- a/sys/src/games/snes/ppu.c
+++ b/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"
 
diff --git a/sys/src/games/snes/snes.c b/sys/src/games/snes/snes.c
index 3e43b631d..769ecb473 100644
--- a/sys/src/games/snes/snes.c
+++ b/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"
 
diff --git a/sys/src/games/snes/spc.c b/sys/src/games/snes/spc.c
index a5fc7ab8a..d00d58efa 100644
--- a/sys/src/games/snes/spc.c
+++ b/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"
 
diff --git a/sys/src/libemu/mkfile b/sys/src/libemu/mkfile
deleted file mode 100644
index f436124a2..000000000
--- a/sys/src/libemu/mkfile
+++ /dev/null
@@ -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