ref: 4ac8bd4ae86f086d26012320b30ac04ce20e9c94
author: telephil9 <telephil9@gmail.com>
date: Thu Nov 5 04:40:45 EST 2020
Initial import
--- /dev/null
+++ b/LICENSE
@@ -1,0 +1,21 @@
+MIT License
+
+Copyright (c) 2020 phil9
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
--- /dev/null
+++ b/mkfile
@@ -1,0 +1,7 @@
+</$objtype/mkfile
+
+CFLAGS=-FTVw
+TARG=vcrop
+OFILES=vcrop.$O
+
+</sys/src/cmd/mkone
--- /dev/null
+++ b/vcrop.c
@@ -1,0 +1,140 @@
+#include <u.h>
+#include <libc.h>
+#include <draw.h>
+#include <event.h>
+#include <keyboard.h>
+
+Image *bg;
+Image *p;
+Image *n;
+char *menustr[] = { "crop", "undo", "save", "exit", 0 };+Menu menu = { menustr };+enum { Mcrop, Mundo, Msave, Mexit };+
+void
+eresized(int new)
+{+ if(new && getwindow(display, Refnone)<0)
+ sysfatal("cannot reattach: %r");+ draw(screen, screen->r, bg, nil, ZP);
+ draw(screen, screen->r, n, nil, n->r.min);
+}
+
+void
+crop(Mouse *m)
+{+ Rectangle r;
+ Image *i;
+
+ r = egetrect(1, m);
+ if(eqrect(r, ZR) || badrect(r))
+ return;
+ i = allocimage(display, Rect(0,0,Dx(r),Dy(r)), screen->chan, 0, DNofill);
+ if(i==nil)
+ sysfatal("allocimage: %r");+ draw(i, i->r, screen, nil, r.min);
+ if(p)
+ freeimage(p);
+ p = n;
+ n = i;
+ eresized(0);
+}
+
+void
+save(Mouse *m)
+{+ char buf[255];
+ int i, fd;
+
+ i = eenter("Save as:", buf, sizeof buf, m);+ if(i<0)
+ return;
+ fd = create(buf, OWRITE, 0644);
+ if(fd<0)
+ sysfatal("create: %r");+ i = writeimage(fd, n, 0);
+ if(i<0)
+ sysfatal("writeimage: %r");+ close(fd);
+}
+
+void
+undo(void)
+{+ if(p==nil)
+ return;
+ freeimage(n);
+ n = p;
+ p = nil;
+ eresized(0);
+}
+
+void
+menu3hit(Mouse *m)
+{+ int i;
+
+ i = emenuhit(3, m, &menu);
+ switch(i){+ case Mcrop:
+ m->buttons = 1;
+ crop(m);
+ break;
+ case Mundo:
+ undo();
+ break;
+ case Msave:
+ save(m);
+ break;
+ case Mexit:
+ exits(nil);
+ }
+}
+
+void
+usage(char *n)
+{+ fprint(2, "usage: %s [image]\n", n);
+ exits("usage");+}
+
+void
+main(int argc, char *argv[])
+{+ Event ev;
+ int e, fd;
+
+ if(argc > 2)
+ usage(argv[0]);
+ fd = 0;
+ if(argc==2){+ fd = open(argv[1], OREAD);
+ if(fd<0)
+ sysfatal("open: %r");+ }
+ if(initdraw(nil, nil, "vcrop")<0)
+ sysfatal("initdraw: %r");+ einit(Emouse|Ekeyboard);
+ bg = allocimage(display, Rect(0,0,1,1), screen->chan, 1, 0xCCCCCCFF);
+ n = readimage(display, fd, 0);
+ if(n==nil)
+ sysfatal("readimage: %r");+ close(fd);
+ p = nil;
+ eresized(0);
+ for(;;){+ e = event(&ev);
+ switch(e){+ case Emouse:
+ if(ev.mouse.buttons==1)
+ crop(&ev.mouse);
+ else if(ev.mouse.buttons==4)
+ menu3hit(&ev.mouse);
+ break;
+ case Ekeyboard:
+ if(ev.kbdc==Kdel)
+ exits(nil);
+ break;
+ }
+ }
+}