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devdraw: use global drawlk instead of per-client

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Setting up for a real window system.
This commit is contained in:
Russ Cox 2020-01-25 14:33:20 -05:00
parent 94d381ec9d
commit 587933c161
3 changed files with 20 additions and 18 deletions
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7
src/cmd/devdraw/mac-screen.m
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@ -39,7 +39,6 @@ static uint msec(void);
static void rpc_resizeimg(Client*);
static void rpc_resizewindow(Client*, Rectangle);
static void rpc_serve(Client*);
static void rpc_setcursor(Client*, Cursor*, Cursor2*);
static void rpc_setlabel(Client*, char*);
static void rpc_setmouse(Client*, Point);
@ -496,17 +495,17 @@ rpc_flush(Client *client, Rectangle r)
if(!rectclip(&r, Rect(0, 0, self.dlayer.texture.width, self.dlayer.texture.height)) || !rectclip(&r, self.img->r))
return;
// self.client->drawlk protects the pixel data in self.img.
// drawlk protects the pixel data in self.img.
// In addition to avoiding a technical data race,
// the lock avoids drawing partial updates, which makes
// animations like sweeping windows much less flickery.
qlock(&self.client->drawlk);
qlock(&drawlk);
[self.dlayer.texture
replaceRegion:MTLRegionMake2D(r.min.x, r.min.y, Dx(r), Dy(r))
mipmapLevel:0
withBytes:byteaddr(self.img, Pt(r.min.x, r.min.y))
bytesPerRow:self.img->width*sizeof(u32int)];
qunlock(&self.client->drawlk);
qunlock(&drawlk);
NSRect nr = NSMakeRect(r.min.x, r.min.y, Dx(r), Dy(r));
dispatch_time_t time;