selk | Keyboard-only rectangle selector for X |
| download: https://git.y1.nz/archives/selk.tar.gz | |
| README | Files | Log | Refs | LICENSE |
commit 7de2151f22900ba6d62adb4de2765cf3573316ec parent ce1a7bc6685440a31cd95da8b8882dcee004b122 Author: Emma Weaver <emma@waeaves.com> Date: Fri, 24 Apr 2026 12:51:35 -0400 included and massively refactored selx to add selection UI Diffstat:
| M | .gitignore | 2 | ++ |
| M | LICENSE | 712 | ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++----- |
| M | Makefile | 23 | +++++++++++++++-------- |
| M | README | 10 | +++++----- |
| M | bmp.c | 1 | + |
| M | bmp.h | 5 | ----- |
| A | config.bmp.h | 2 | ++ |
| D | config.default.h | 5 | ----- |
| A | config.draw.h | 23 | +++++++++++++++++++++++ |
| M | config.mk | 11 | ++++------- |
| A | draw.c | 510 | +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| A | draw.h | 81 | +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| M | main.c | 198 | ++++++++++++++++++++++++++++++++++++++++++++++++++----------------------------- |
| A | test-bmp.c | 77 | +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
14 files changed, 1519 insertions(+), 141 deletions(-)
diff --git a/.gitignore b/.gitignore @@ -1,4 +1,5 @@ grabs +draw config.h @@ -6,3 +7,4 @@ config.h **.swp **.bmp +test-out diff --git a/LICENSE b/LICENSE @@ -1,38 +1,674 @@ -MIT/X Consortium License - -© 2010-2026 Hiltjo Posthuma <hiltjo@codemadness.org> -© 2006-2019 Anselm R Garbe <anselm@garbe.ca> -© 2006-2009 Jukka Salmi <jukka at salmi dot ch> -© 2006-2007 Sander van Dijk <a dot h dot vandijk at gmail dot com> -© 2007-2011 Peter Hartlich <sgkkr at hartlich dot com> -© 2007-2009 Szabolcs Nagy <nszabolcs at gmail dot com> -© 2007-2009 Christof Musik <christof at sendfax dot de> -© 2007-2009 Premysl Hruby <dfenze at gmail dot com> -© 2007-2008 Enno Gottox Boland <gottox at s01 dot de> -© 2008 Martin Hurton <martin dot hurton at gmail dot com> -© 2008 Neale Pickett <neale dot woozle dot org> -© 2009 Mate Nagy <mnagy at port70 dot net> -© 2010-2012 Connor Lane Smith <cls@lubutu.com> -© 2011 Christoph Lohmann <20h@r-36.net> -© 2015-2016 Quentin Rameau <quinq@fifth.space> -© 2015-2016 Eric Pruitt <eric.pruitt@gmail.com> -© 2016-2017 Markus Teich <markus.teich@stusta.mhn.de> -© 2020-2022 Chris Down <chris@chrisdown.name> - -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. 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It is safest +to attach them to the start of each source file to most effectively +state the exclusion of warranty; and each file should have at least +the "copyright" line and a pointer to where the full notice is found. + + <one line to give the program's name and a brief idea of what it does.> + Copyright (C) <year> <name of author> + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see <https://www.gnu.org/licenses/>. + +Also add information on how to contact you by electronic and paper mail. + + If the program does terminal interaction, make it output a short +notice like this when it starts in an interactive mode: + + <program> Copyright (C) <year> <name of author> + This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. + This is free software, and you are welcome to redistribute it + under certain conditions; type `show c' for details. + +The hypothetical commands `show w' and `show c' should show the appropriate +parts of the General Public License. Of course, your program's commands +might be different; for a GUI interface, you would use an "about box". + + You should also get your employer (if you work as a programmer) or school, +if any, to sign a "copyright disclaimer" for the program, if necessary. +For more information on this, and how to apply and follow the GNU GPL, see +<https://www.gnu.org/licenses/>. + + The GNU General Public License does not permit incorporating your program +into proprietary programs. If your program is a subroutine library, you +may consider it more useful to permit linking proprietary applications with +the library. If this is what you want to do, use the GNU Lesser General +Public License instead of this License. But first, please read +<https://www.gnu.org/licenses/why-not-lgpl.html>. diff --git a/Makefile b/Makefile @@ -1,14 +1,21 @@ - include config.mk -grabs: bmp.c bmp.h -grabs: config.h -grabs: main.c - cc main.c ${CFLAGS} ${LDFLAGS} -o grabs +grabs: main.c draw.o bmp.o config.mk + cc main.c draw.o bmp.o ${CFLAGS} ${LDFLAGS} -o grabs + +test-bmp: test-bmp.c bmp.o draw.o config.mk + cc test-bmp.c bmp.o ${CFLAGS} ${LDFLAGS} -o test-bmp + +bmp.o: bmp.c bmp.h config.mk + cc -c bmp.c ${CFLAGS} ${LDFLAGS} -o bmp.o + +draw.o: draw.c draw.h config.draw.h config.mk + cc -c draw.c ${CFLAGS} ${LDFLAGS} -o draw.o -config.h: config.default.h - cp config.default.h config.h +clean: + rm -f draw.o bmp.o util.o draw grabs test-out/*.bmp test-out/*.gif +# TODO implement clean and install scripts like this # dist: clean # mkdir -p st-$(VERSION) # cp -R FAQ LEGACY TODO LICENSE Makefile README config.mk\ @@ -25,5 +32,5 @@ config.h: config.default.h # chmod 644 $(DESTDIR)$(MANPREFIX)/man1/st.1 # tic -sx st.info -.PHONY: test bmp clean +.PHONY: clean diff --git a/README b/README @@ -1,8 +1,8 @@ +Grabs is a minimal keyboard-based screenshot program. -Grabs is a minimal screenshot program based on X11. +-------------------------------------------------------------------------- TODO: - - add vim-style keyboard controls and GUI for that - - add "install" and "clean" directives like what dwm and st have - - figure out a space-efficient way to record video - + [ ] add screen recording to gifs + [ ] figure out why feh but not firefox displays the bmp output upside-down (?) + [ ] add "install" and "clean" directives like what dwm and st have diff --git a/bmp.c b/bmp.c @@ -8,6 +8,7 @@ #include <stdio.h> #include <string.h> +#include "bmp.h" #define WRITE_BMP_U16(offset, value) \ header[offset + 0] = 0xff & (value >> 0); \ diff --git a/bmp.h b/bmp.h @@ -1,9 +1,6 @@ /* Originally retrieved from github.com/yunhao-qian/save-bmp */ /* Adapted by Emma Weaver on 26-04-16. */ -#ifndef SAVE_BMP_INCLUDE -#define SAVE_BMP_INCLUDE - #include <stdint.h> @@ -23,5 +20,3 @@ enum write_bmp_status write_bmp( ); const char * get_bmp_status_message(enum write_bmp_status status); - -#endif /* SAVE_BMP_INCLUDE */ diff --git a/config.bmp.h b/config.bmp.h @@ -0,0 +1,2 @@ +#define MAX_IMAGE_WIDTH 1366 +#define MAX_IMAGE_HEIGHT 768 diff --git a/config.default.h b/config.default.h @@ -1,5 +0,0 @@ - -/* grabs will segfault if you try to take a screenshot larger than this. */ -#define MAX_SCREEN_WIDTH 1366 -#define MAX_SCREEN_HEIGHT 768 - diff --git a/config.draw.h b/config.draw.h @@ -0,0 +1,23 @@ +const char * line_color_name = "#38ff38"; + +const int border_width = 3; + +const int sleep_ms = 30; +const int movement_speed_slow = 2; +const int movement_speed_fast = 12; + +/* key mapping */ +#define KEY_SHIFT XK_Shift_L +#define KEY_CONTROL XK_Control_L +#define KEY_UP XK_k +#define KEY_DOWN XK_j +#define KEY_LEFT XK_h +#define KEY_RIGHT XK_l +#define KEY_DOWN_2 XK_s +#define KEY_UP_2 XK_w +#define KEY_RIGHT_2 XK_d +#define KEY_LEFT_2 XK_a +#define KEY_MONITOR XK_m +#define KEY_WINDOW XK_n +#define KEY_TAKE XK_Return +#define KEY_CANCEL XK_Escape diff --git a/config.mk b/config.mk @@ -7,17 +7,14 @@ VERSION = 1.0 PREFIX = /usr/local MANPREFIX = ${PREFIX}/share/man -X11INC = /usr/X11R6/include -X11LIB = /usr/X11R6/lib - # includes and libs -INCS = -I${X11INC} -LIBS = -L${X11LIB} -lX11 +INCS = -I/usr/X11R6/include -I/usr/include/freetype2 +LIBS = -L/usr/X11R6/lib -lX11 -lfontconfig -lXft -lXrandr # flags -CPPFLAGS = -D_DEFAULT_SOURCE -D_BSD_SOURCE -D_XOPEN_SOURCE=700L -DVERSION=\"${VERSION}\" +CPPFLAGS = "" #-D_DEFAULT_SOURCE -D_BSD_SOURCE -D_XOPEN_SOURCE=700L -DVERSION=\"${VERSION}\" #CFLAGS = -g -std=c99 -pedantic -Wall -O0 ${INCS} ${CPPFLAGS} -CFLAGS = -std=c99 -pedantic -Wall -Wno-deprecated-declarations -Os ${INCS} ${CPPFLAGS} +CFLAGS = ${INCS} #-std=c99 -pedantic -Wall -Wno-deprecated-declarations -Os ${INCS} ${CPPFLAGS} LDFLAGS = ${LIBS} # Solaris diff --git a/draw.c b/draw.c @@ -0,0 +1,510 @@ +#include <stdio.h> +#include <stdlib.h> +#include <unistd.h> +#include <X11/Xlib.h> +#include <X11/Xutil.h> +#include <X11/extensions/Xrandr.h> + +#include "config.draw.h" +#include "draw.h" + +void +setup_draw(DrawContext *ctx, X11 *x11) +{ + unsigned long mask = 0; + XSetWindowAttributes window_attributes; + + XColor color; + int color_alloc_ret = XAllocNamedColor( + x11->display, + DefaultColormap( + x11->display, + DefaultScreen(x11->display) + ), + line_color_name, + (XColor []) {0}, + &color + ); + if (!color_alloc_ret) + fatal("failed to allocate color."); + + window_attributes.override_redirect = True; + mask |= CWOverrideRedirect; + window_attributes.background_pixel = color.pixel; + mask |= CWBackPixel; + + window_attributes.event_mask = StructureNotifyMask; + mask |= CWEventMask; + + for (int i = 0; i < WINDOW_COUNT; i++) { + x11->window[i] = XCreateWindow( + x11->display, + x11->root.window, + x11->root.x, x11->root.y, + x11->root.w, x11->root.h, + 0, + CopyFromParent, + InputOutput, + CopyFromParent, + mask, + &window_attributes + ); + char name[] = "selx0"; + name[ARRLEN(name) - 2] += i; + XClassHint classhint = { name, "selx" }; + XSetClassHint(x11->display, x11->window[i], &classhint); + } +} + +void +setup_keyboard(X11 * x11) +{ + /* when launched via dwm keybinding, it fails the grab since + * dwm has it grabbed already. listen for FocusChangeMask and + * keep retrying. */ + int keyboard_grab_result; + XSelectInput(x11->display, x11->root.window, FocusChangeMask); + do { + keyboard_grab_result = XGrabKeyboard( + x11->display, x11->root.window, 0, + GrabModeAsync, GrabModeAsync, CurrentTime + ); + XEvent junk; + XNextEvent(x11->display, &junk); + } while (keyboard_grab_result == AlreadyGrabbed); + XSelectInput(x11->display, x11->root.window, 0x0); + + if (keyboard_grab_result != GrabSuccess) + fatal("failed to grab keyboard"); +} + +void +setup_display(X11 * x11) +{ + x11->display = XOpenDisplay(NULL); + if (x11->display == NULL) + fatal("failed to open X display"); + + XWindowAttributes attributes; + x11->root.window = DefaultRootWindow(x11->display); + + int get_attributes_ret = XGetWindowAttributes( + x11->display, + x11->root.window, + &attributes + ); + if (get_attributes_ret == 0) + fatal("XGetWindowAttributes() failed"); + + x11->root.x = attributes.x; + x11->root.y = attributes.y; + x11->root.w = attributes.width; + x11->root.h = attributes.height; +} + +void +select_window(DrawContext * ctx, X11 * x11, XEvent event) +{ + XWindowAttributes window_attributes; + int b; + + ctx->target.window = event.xkey.subwindow; + if (ctx->target.window == None) + ctx->target.window = event.xkey.root; + + { + int get_attributes_result = XGetWindowAttributes( + x11->display, + ctx->target.window, + &window_attributes + ); + + if (get_attributes_result == 0) + fatal("XGetWindowAttributes() failed"); + } + + b = window_attributes.border_width; + ctx->start.x = window_attributes.x + b; + ctx->start.y = window_attributes.y + b; + ctx->end.x = ctx->start.x + window_attributes.width; + ctx->end.y = ctx->start.y + window_attributes.height; +} + +void +select_monitor(DrawContext * ctx, X11 * x11) +{ + ctx->target.monitor = -64; + + int nmonitors; + XRRMonitorInfo *monitors = XRRGetMonitors( + x11->display, x11->root.window, True, &nmonitors + ); + + if (monitors == NULL) + fatal("XRRGetMonitors() failed"); + + Point * cur = &ctx->end; + for (SIZE_T i = 0; i < nmonitors; ++i) { + XRRMonitorInfo * m = monitors + i; + if ( + cur->x >= m->x && + cur->y >= m->y && + cur->x < (m->x + m->width) && + cur->y < (m->y + m->height) + ) { + ctx->target.monitor = i; + break; + } + } + + if (ctx->target.monitor >= nmonitors) + fatal("no such monitor" "\n"); + + XRRMonitorInfo * m = monitors + ctx->target.monitor; + ctx->start.x = m->x; + ctx->start.y = m->y; + ctx->end.x = ctx->start.x + m->width; + ctx->end.y = ctx->start.y + m->height; +} + +Rect +get_rectangle(DrawContext * ctx, X11 * x11) +{ + int px[2] = { ctx->start.x, ctx->end.x }, + py[2] = { ctx->start.y, ctx->end.y }; + + /* ensure positive orientations */ + if (px[1] < px[0]) { + px[0] = ctx->end.x; + px[1] = ctx->start.x; + } + if (py[1] < py[0]) { + py[0] = ctx->end.y; + py[1] = ctx->start.y; + } + + px[0] = CLAMP(x11->root.x, px[0], x11->root.x+x11->root.w); + px[1] = CLAMP(x11->root.x, px[1], x11->root.x+x11->root.w); + py[0] = CLAMP(x11->root.y, py[0], x11->root.y+x11->root.h); + py[1] = CLAMP(x11->root.y, py[1], x11->root.y+x11->root.h); + + int x = px[0]; + int y = py[0]; + int w = DIFF(px[0], px[1]); + int h = DIFF(py[0], py[1]); + + return (Rect) { x, y, w, h }; +} + +Rect +get_corner(DrawContext * ctx) +{ +} + +int +is_fast(DrawContext * ctx) +{ + return !(ctx->keys_down_mask & KEY_SHIFT_MASK); +} + +void +draw(DrawContext * ctx, X11 * x11) +{ + Rect selection; + int x, y, w, h, b; + Rect * rects; + + /* clamp the control points... */ + ctx->start.x = CLAMP(x11->root.x, ctx->start.x, x11->root.x+x11->root.w); + ctx->start.y = CLAMP(x11->root.y, ctx->start.y, x11->root.y+x11->root.h); + ctx->end.x = CLAMP(x11->root.x, ctx->end.x, x11->root.x+x11->root.w); + ctx->end.y = CLAMP(x11->root.y, ctx->end.y, x11->root.y+x11->root.h); + + selection = get_rectangle(ctx, x11); + x = selection.x; + y = selection.y; + w = selection.w; + h = selection.h; + b = border_width; + rects = (Rect[]) { + { x-b, y-b, w+b, b }, /* top */ + { x-b, y, b, h+b }, /* left */ + { x, y+h, w+b, b }, /* bottom */ + { x+w, y-b, b, h+b }, /* right */ + { x+w/2-b/2,y+h/2-b/2,b,b }, /* center or corner */ + }; + + /* show the active edges thicker */ + if (ctx->keys_down_mask & KEY_DOWN2_MASK) rects[2].h *= 2; + if (ctx->keys_down_mask & KEY_RIGHT2_MASK) rects[3].w *= 2; + if (ctx->keys_down_mask & KEY_LEFT2_MASK) { + rects[1].w *= 2; rects[1].x -= b; + } + if (ctx->keys_down_mask & KEY_UP2_MASK) { + rects[0].h *= 2; rects[0].y -= b; + } + + /* make the indicator bigger when fast */ + if (is_fast(ctx)) { + rects[4].x -= b; + rects[4].y -= b; + rects[4].w += 2*b; + rects[4].h += 2*b; + } + + for (int i = 0; i < WINDOW_COUNT; i++) { + Rect * rect = rects + i; + XMoveResizeWindow( + x11->display, x11->window[i], + rect->x, rect->y, + rect->w, rect->h + ); + } + + XFlush(x11->display); +} + +void +init_draw(DrawContext * ctx, X11 * x11) // , Point p) +{ + ctx->start.x = border_width * 2; + ctx->start.y = border_width * 2; + ctx->end.x = ctx->start.x + 400; + ctx->end.y = ctx->start.y + 400; + + draw(ctx, x11); + + for (int i = 0; i < ARRLEN(x11->window); i++) + XMapWindow(x11->display, x11->window[i]); + + XFlush(x11->display); +} + +void +set_up(DrawContext * ctx, X11 * x11) +{ + setup_display(x11); + setup_keyboard(x11); + setup_draw(ctx, x11); + init_draw(ctx, x11); +} + +void +clean_up(DrawContext * ctx, X11 * x11) +{ + for (int i = 0; i < ARRLEN(x11->window); ++i) + XDestroyWindow(x11->display, x11->window[i]); + + int destroyed = 0; + int unmapped = 0; + for (XEvent event; !(destroyed == WINDOW_COUNT && unmapped == WINDOW_COUNT);) { + XNextEvent(x11->display, &event); + for (int i = 0; i < ARRLEN(x11->window); i++) { + if(event.type == DestroyNotify) + destroyed += (event.xdestroywindow.window == x11->window[i]); + if(event.type == UnmapNotify) + unmapped += (event.xunmap.window == x11->window[i]); + } + } + + XUngrabPointer(x11->display, CurrentTime); + XUngrabKeyboard(x11->display, CurrentTime); +} + +void +handle_key_press(DrawContext * ctx, X11 * x11, XEvent event) +{ + KeySym keysym = XKeycodeToKeysym(x11->display, event.xkey.keycode, 0); + + if ((event.xkey.state & ControlMask) && keysym == XK_c) + fatal("Keyboard Interrupt" "\n"); + + switch (keysym) { + case KEY_MONITOR: + select_monitor(ctx, x11); + draw(ctx, x11); + break; + case KEY_WINDOW: + select_window(ctx, x11, event); + draw(ctx, x11); + break; + case KEY_TAKE: + int shift = ctx->keys_down_mask & KEY_SHIFT_MASK; + ctx->state = shift ? STATE_RECORD : STATE_TAKE; + break; + case KEY_CANCEL: + fatal("Cancelled" "\n"); + break; + case KEY_SHIFT: ctx->keys_down_mask |= KEY_SHIFT_MASK; break; + case KEY_CONTROL: ctx->keys_down_mask |= KEY_CONTROL_MASK; break; + case KEY_LEFT: ctx->keys_down_mask |= KEY_LEFT_MASK; break; + case KEY_RIGHT: ctx->keys_down_mask |= KEY_RIGHT_MASK; break; + case KEY_UP: ctx->keys_down_mask |= KEY_UP_MASK; break; + case KEY_DOWN: ctx->keys_down_mask |= KEY_DOWN_MASK; break; + case KEY_DOWN_2: ctx->keys_down_mask |= KEY_DOWN2_MASK; break; + case KEY_UP_2: ctx->keys_down_mask |= KEY_UP2_MASK; break; + case KEY_LEFT_2: ctx->keys_down_mask |= KEY_LEFT2_MASK; break; + case KEY_RIGHT_2: ctx->keys_down_mask |= KEY_RIGHT2_MASK; break; + } + + /* draw to update visual hinting */ + draw(ctx, x11); +} + +void +handle_key_release(DrawContext * ctx, X11 * x11, XEvent event) +{ + KeySym keysym = XKeycodeToKeysym( + x11->display, event.xkey.keycode, 0 + ); + + switch (keysym) { + case KEY_SHIFT: ctx->keys_down_mask &= ~KEY_SHIFT_MASK; break; + case KEY_CONTROL: ctx->keys_down_mask &= ~KEY_CONTROL_MASK; break; + case KEY_LEFT: ctx->keys_down_mask &= ~KEY_LEFT_MASK; break; + case KEY_RIGHT: ctx->keys_down_mask &= ~KEY_RIGHT_MASK; break; + case KEY_DOWN: ctx->keys_down_mask &= ~KEY_DOWN_MASK; break; + case KEY_UP: ctx->keys_down_mask &= ~KEY_UP_MASK; break; + case KEY_DOWN_2: ctx->keys_down_mask &= ~KEY_DOWN2_MASK; break; + case KEY_UP_2: ctx->keys_down_mask &= ~KEY_UP2_MASK; break; + case KEY_LEFT_2: ctx->keys_down_mask &= ~KEY_LEFT2_MASK; break; + case KEY_RIGHT_2: ctx->keys_down_mask &= ~KEY_RIGHT2_MASK; break; + } + + /* draw to update visual hinting */ + draw(ctx, x11); +} + +void +handle_motion_notify(DrawContext * ctx, X11 * x11, XEvent event, int * queued) +{ + Point p = { event.xmotion.x, event.xmotion.y }; + int ndiscarded = 0; + + for ( int n = 0; n > 0 || (n = XPending(x11->display)) > 0; n--) { + XNextEvent(x11->display, &event); + if (event.type == MotionNotify) { + p = (Point) { event.xmotion.x, event.xmotion.y }; + ndiscarded++; + } else { + * queued = TRUE; + LOG("[selx]: queuing event" "\n"); + break; + } + } + + if (ndiscarded) + LOG("[selx]: discarded %d stale MotionNotify event" "\n", ndiscarded); +} + +void +handle_xevent(DrawContext * ctx, X11 * x11, XEvent event, int * queued) +{ + switch (event.type) { + case KeyPress: + handle_key_press(ctx, x11, event); + break; + case KeyRelease: + handle_key_release(ctx, x11, event); + break; + case MotionNotify: + // TODO is this needed? + // handle_motion_notify(ctx, x11, event, queued); + break; + case Expose: + draw(ctx, x11); + break; + case DestroyNotify: + fatal("received DestroyNotify" "\n"); + break; + } +} + +void +do_movement(DrawContext * ctx, X11 * x11) +{ + int mask = ctx->keys_down_mask; + + Point start = ctx->start, end = ctx->end; + + int down = mask & KEY_DOWN_MASK; + int up = mask & KEY_UP_MASK; + int left = mask & KEY_LEFT_MASK; + int right = mask & KEY_RIGHT_MASK; + + int down2 = mask & KEY_DOWN2_MASK; + int up2 = mask & KEY_UP2_MASK; + int left2 = mask & KEY_LEFT2_MASK; + int right2 = mask & KEY_RIGHT2_MASK; + + int shift = mask & KEY_SHIFT_MASK; + int controlled = mask & KEY_CONTROL_MASK; + + int speed = is_fast(ctx) ? movement_speed_fast : movement_speed_slow; + int delta_x = speed * ((right != 0) - (left != 0)); + int delta_y = speed * ((down != 0) - (up != 0)); + int any_specific = down2 || up2 || right2 || left2; + + int min_x = x11->root.x; + int min_y = x11->root.y; + int max_x = x11->root.x + x11->root.w; + int max_y = x11->root.y + x11->root.h; + + if (delta_x == 0 && delta_y == 0) + return; + + if (!any_specific) { + /* translate the whole selection, */ + + /* (apply bounds so that the rect stops at screen's edge */ + if(delta_x > 0 && end.x + delta_x > max_x) + delta_x = max_x - end.x; + if(delta_y > 0 && end.y + delta_y > max_y) + delta_y = max_y - end.y; + if(delta_x < 0 && start.x + delta_x < min_x) + delta_x = min_x - start.x; + if(delta_y < 0 && start.y + delta_y < min_y) + delta_y = min_y - start.y; + + ctx->start.x += delta_x; + ctx->start.y += delta_y; + ctx->end.x += delta_x; + ctx->end.y += delta_y; + } else { + /* only move specific sides */ + if (down2) ctx->end.y += delta_y; + if (up2) ctx->start.y += delta_y; + if (right2) ctx->end.x += delta_x; + if (left2) ctx->start.x += delta_x; + } + + draw(ctx, x11); + ctx->frames_moving++; +} + +void +run_draw_loop(DrawContext * ctx, X11 * x11) +{ + int queued = FALSE, event_set; + XEvent event; + + for (;;) { + if (ctx->state == STATE_TAKE || ctx->state == STATE_RECORD) + break; + + event_set = XCheckMaskEvent( + x11->display, + ~0, /* accept all events */ + &event + ); + + if (!event_set) { + int sleep_result = usleep(sleep_ms * 1000); + if (ctx->keys_down_mask != 0) do_movement(ctx, x11); + else ctx->frames_moving = 0; + continue; + } + + handle_xevent(ctx, x11, event, &queued); + } +} diff --git a/draw.h b/draw.h @@ -0,0 +1,81 @@ +/* Originally retrieved from https://codeberg.org/NRK/selx */ +/* Adapted by Emma Weaver on 26-04-20. */ + +//////////////// macros + +#define DIFF(A, B) ((A) > (B) ? (A) - (B) : (B) - (A)) +#define SIZE_T ptrdiff_t +#define SIZEOF(...) ((SIZE_T)sizeof(__VA_ARGS__)) +#define ARRLEN(...) (SIZEOF(__VA_ARGS__) / SIZEOF(0[__VA_ARGS__])) +#define ARREND(V) ((V) + ARRLEN(V)) +#define CLAMP(lo, x, hi) ((x) < (lo) ? (lo) : ((x) > (hi) ? (hi) : x)) + +#define TRUE 1 +#define FALSE 0 +#define WINDOW_COUNT 4 + +#define LOG(...) printf(__VA_ARGS__) + +#define fatal(message) { fprintf(stderr, message); exit(1); } + +//////////////// types + +typedef enum { + STATE_NONE, + STATE_TAKE, /* take screenshot */ + STATE_RECORD /* take screen recording */ +} State; +enum { EVENT_CLICK, EVENT_MOTION, EVENT_SWAP }; +enum { + KEY_UP_MASK = 1 << 0, + KEY_DOWN_MASK = 1 << 1, + KEY_RIGHT_MASK = 1 << 2, + KEY_LEFT_MASK = 1 << 3, + + KEY_UP2_MASK = 1 << 4, + KEY_DOWN2_MASK = 1 << 5, + KEY_LEFT2_MASK = 1 << 6, + KEY_RIGHT2_MASK = 1 << 7, + + KEY_CONTROL_MASK = 1 << 8, + KEY_SHIFT_MASK = 1 << 9 +}; + +typedef struct { int x, y; } Point; +typedef struct { int x, y, w, h; } Rect; + +typedef struct { + Display * display; + struct { + Window window; + int x, y, w, h; + } root; + Window window[WINDOW_COUNT]; +} X11; + +typedef struct { + int keys_down_mask; + int frames_moving; + + Point start, end; + State state; + union { + Window window; + int monitor; + } target; + const char * color_name; + const int border_width; +} DrawContext; + +///////////////////////////////// functions + +void set_up(DrawContext * ctx, X11 * x11); +void clean_up(DrawContext * ctx, X11 * x11); +void select_monitor(DrawContext * ctx, X11 * x11); +void select_window(DrawContext * ctx, X11 * x11, XEvent event); +int is_fast(DrawContext * ctx); + +Rect get_rectangle(DrawContext * ctx, X11 * x11); +void draw(DrawContext * ctx, X11 * x11); +void run_draw_loop(DrawContext * ctx, X11 * x11); + diff --git a/main.c b/main.c @@ -1,94 +1,146 @@ +#include <limits.h> +#include <stddef.h> +#include <stdint.h> #include <stdio.h> + +#include <stdlib.h> +#include <string.h> +#include <unistd.h> +#include <time.h> + #include <X11/Xlib.h> #include <X11/Xutil.h> -#include <stdlib.h> -#include <limits.h> +#include <X11/keysym.h> -#include "config.h" +#include "draw.h" #include "bmp.h" -#include "bmp.c" -#define CANCEL(message) { fprintf(stderr, (message)); exit(1); } +#define MAX_IMAGE_WIDTH 1366 +#define MAX_IMAGE_HEIGHT 768 +#define MAX_DATETIME_LENGTH 100 +#define MAX_FILENAME_LENGTH 200 + +const char * usage = \ +"Grabs 1.0 🄯 Emma Weaver 2026" "\n\n" \ +"Usage: grabs -d DIR" "\n\n" \ +"Take screenshots and screen recordings with the keyboard." "\n\n" \ +"Keyboard controls:" "\n" \ +" [hjkl]: move selection" "\n" \ +" [shift + hjkl]: move selection slower" "\n" \ +" [wasd]: specify which sides to move" "\n" \ +" [m]: select current monitor" "\n" \ +" [n]: select current window" "\n" \ +" [enter]: take screenshot" "\n" \ +" [shift + enter]: start screen recording" "\n\n"; + +uint8_t image_buffer[MAX_IMAGE_WIDTH * MAX_IMAGE_HEIGHT * 3]; +char datetime_buffer[MAX_DATETIME_LENGTH]; +char filename_buffer[MAX_FILENAME_LENGTH]; + +void +write_screenshot_to_buffer(X11 * x11, Rect target, uint8_t * image_buffer) +{ + XImage * ximage; + int x = 0, y = 0; + long pixel; + uint8_t * buffer_index = image_buffer; + + ximage = XGetImage( + x11->display, x11->root.window, + target.x, target.y, target.w, target.h, + AllPlanes, ZPixmap + ); + + for (;;) { + pixel = XGetPixel(ximage, x, y); + *buffer_index++ = (pixel & ximage->red_mask) >> 16; + *buffer_index++ = (pixel & ximage->green_mask) >> 8; + *buffer_index++ = pixel & ximage->blue_mask; -uint8_t image_buffer[3 * MAX_SCREEN_WIDTH * MAX_SCREEN_HEIGHT]; + x++; + if (x >= target.w) { + x = 0; + y++; + } + if (y >= target.h) + break; + } +} -int -stoi(char * arg) +void +populate_filename(const char * directory, const char * extension) { - char * endptr; - int ret; - ret = strtol(arg, &endptr, 10); - if (* endptr != '\0' || ret > INT_MAX || ret < INT_MIN) - CANCEL("Couldn't parse arguments." "\n"); - return ret; + time_t current_time = time(NULL); + strftime( + datetime_buffer, + MAX_DATETIME_LENGTH, + "%F_%T", + localtime(¤t_time) + ); + sprintf( + filename_buffer, + "%s/%s.%s", + directory, + datetime_buffer, + extension + ); + printf("Saving to %s..." "\n", filename_buffer); +} + +void +take_bmp_screenshot(X11 * x11, Rect rect) +{ + FILE * stream = fopen(filename_buffer, "w"); + int status; + + /* bmp screenshot */ + write_screenshot_to_buffer(x11, rect, image_buffer); + status = write_bmp(stream, image_buffer, rect.w, rect.h); + if (status != 0) + fatal(get_bmp_status_message(status)); } int -main(int argc, char * argv[]) +main(int argc, const char * argv[]) { - XImage * ximage; - XWindowAttributes wa; - Display * display; - Window window; - int start_x = 0, start_y = 0, width, height; - - display = XOpenDisplay(NULL); - if (display == NULL) - CANCEL("Couldn't open display." "\n"); - - window = RootWindow(display, DefaultScreen(display)); - - if (argc == 1) { - int get_result = XGetWindowAttributes(display, window, &wa); - if (get_result == 0) - CANCEL("XGetWindowAttributes failed." "\n"); - width = wa.width; - height = wa.height; - } else if (argc == 5) { - start_x = stoi(argv[1]); - start_y = stoi(argv[2]); - width = stoi(argv[3]); - height = stoi(argv[4]); - } else { - CANCEL( - "grabs [x y w h]" "\n" \ - "Minimal screenshot utility." "\n" - ); + X11 x11; + DrawContext ctx = {}; + const char * directory; + + /* print usage if format isn't correct */ + if ( + !( + argc == 3 && + argv[1][0] == '-' && + argv[1][1] == 'd' && + argv[1][2] == '\0' + ) + ) { + printf(usage); + exit(0); } - ximage = XGetImage( - display, window, - start_x, start_y, width, height, - AllPlanes, ZPixmap - ); - - { - int x = 0, y = 0; - long pixel; - uint8_t * buffer_index = image_buffer; - - for (;;) { - pixel = XGetPixel(ximage, x, y); - - *buffer_index++ = (pixel & ximage->red_mask) >> 16; - *buffer_index++ = (pixel & ximage->green_mask) >> 8; - *buffer_index++ = pixel & ximage->blue_mask; - - x++; - if (x >= width) { - x = 0; - y++; - } - if (y >= height) - break; - } + /* pick a rectangle */ + set_up(&ctx, &x11); + run_draw_loop(&ctx, &x11); + clean_up(&ctx, &x11); + Rect rect = get_rectangle(&ctx, &x11); + + /* do output */ + + directory = argv[2]; + if (ctx.state == STATE_TAKE) { + populate_filename(directory, "bmp"); + take_bmp_screenshot(&x11, rect); + } else { + /* gif screen recording */ + populate_filename(directory, "gif"); + fatal("Screen Recording not yet implemented." "\n"); } - const int status = write_bmp(stdout, image_buffer, width, height); - if (status != 0) - CANCEL(get_bmp_status_message(status)); + XCloseDisplay(x11.display); - return 1; + return 0; } diff --git a/test-bmp.c b/test-bmp.c @@ -0,0 +1,77 @@ +#include <stdio.h> +#include <X11/Xlib.h> +#include <X11/Xutil.h> +#include <stdlib.h> +#include <limits.h> + +#include "config.bmp.h" +#include "bmp.h" + +#define CANCEL(message) { fprintf(stderr, (message)); exit(1); } + + +uint8_t image_buffer[3 * MAX_IMAGE_WIDTH * MAX_IMAGE_HEIGHT]; + +int +main(int argc, char * argv[]) +{ + XImage * ximage; + XWindowAttributes wa; + Display * display; + Window window; + int start_x = 0, start_y = 0, width, height; + + display = XOpenDisplay(NULL); + if (display == NULL) + CANCEL("Couldn't open display." "\n"); + + window = RootWindow(display, DefaultScreen(display)); + + if (argc == 1) { + int get_result = XGetWindowAttributes(display, window, &wa); + if (get_result == 0) + CANCEL("XGetWindowAttributes failed." "\n"); + width = wa.width; + height = wa.height; + } else { + CANCEL( + "grabs [x y w h]" "\n" \ + "Minimal screenshot utility." "\n" + ); + } + + ximage = XGetImage( + display, window, + start_x, start_y, width, height, + AllPlanes, ZPixmap + ); + + { + int x = 0, y = 0; + long pixel; + uint8_t * buffer_index = image_buffer; + + for (;;) { + pixel = XGetPixel(ximage, x, y); + + *buffer_index++ = (pixel & ximage->red_mask) >> 16; + *buffer_index++ = (pixel & ximage->green_mask) >> 8; + *buffer_index++ = pixel & ximage->blue_mask; + + x++; + if (x >= width) { + x = 0; + y++; + } + if (y >= height) + break; + } + } + + const int status = write_bmp(stdout, image_buffer, width, height); + if (status != 0) + CANCEL(get_bmp_status_message(status)); + + return 1; +} +
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