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authorMattias Andrée <maandree@operamail.com>2014-10-20 05:08:07 +0200
committerMattias Andrée <maandree@operamail.com>2014-10-20 05:08:07 +0200
commitdba7dfb765a4cfd9834c2e852c5ca235ee06f9be (patch)
tree906d5710085ed5020bd61e8bbd00f0c5edca1e2d /src
parentpython version, still too slow (diff)
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c version, fast enought
Signed-off-by: Mattias Andrée <maandree@operamail.com>
Diffstat (limited to 'src')
-rwxr-xr-xsrc/scrotty78
-rw-r--r--src/scrotty.c187
2 files changed, 187 insertions, 78 deletions
diff --git a/src/scrotty b/src/scrotty
deleted file mode 100755
index b334042..0000000
--- a/src/scrotty
+++ /dev/null
@@ -1,78 +0,0 @@
-#!/usr/bin/env python3
-# -*- python -*-
-'''
-scrotty — Screenshot program for Linux's TTY
-Copyright © 2014 Mattias Andrée (maandree@member.fsf.org)
-
-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 <http://www.gnu.org/licenses/>.
-'''
-
-import os, sys
-
-fbno = 0
-
-def write(string):
- os.write(pipe_write, string.encode('utf-8'))
-
-while os.path.exists('/dev/fb%i' % fbno):
- with open('/dev/fb%i' % fbno, 'rb') as file:
- data = file.read()
-
- pathname = 'fb%i.png' % fbno
- if os.path.exists(pathname):
- i = 2
- while os.path.exists('%s.%i' % (pathname, i)):
- i += 1
- pathname = '%s.%i' % (pathname, i)
-
- (pipe_read, pipe_write) = os.pipe()
- pid = os.fork()
-
- if pid == 0:
- os.close(pipe_write)
- if pipe_read != 0:
- os.close(0)
- os.dup2(pipe_read, 0)
- os.close(pipe_read)
- os.execlp('convert', 'convert', '/dev/stdin', pathname)
-
- os.close(pipe_read)
-
- write('P3\n')
- with open('/sys/class/graphics/fb%i/virtual_size' % fbno, 'rb') as file:
- write(file.read().decode('utf-8', 'strict').replace(',', ' '))
- write('255\n')
-
- j = 0
- data_length = len(data)
- for i in range(0, data_length, 4):
- r, g, b = data[i + 2], data[i + 1], data[i + 0]
- j += 1
- if (j == 5) or (i + 4 == data_length):
- j = 0
- write('%i %i %i\n' % (r, g, b))
- else:
- write('%i %i %i ' % (r, g, b))
-
- os.close(pipe_write)
-
- reaped = 0
- while reaped != pid:
- (reaped, status) = os.waitpid(pid, 0)
- if status == 0:
- print('Saved framebuffer %i to %s' % (fbno, pathname), file = sys.stderr)
- else:
- sys.exit(1)
- fbno += 1
-
diff --git a/src/scrotty.c b/src/scrotty.c
new file mode 100644
index 0000000..6552abf
--- /dev/null
+++ b/src/scrotty.c
@@ -0,0 +1,187 @@
+/**
+ * scrotty — Screenshot program for Linux's TTY
+ * Copyright © 2014 Mattias Andrée (maandree@member.fsf.org)
+ *
+ * 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 <http://www.gnu.org/licenses/>.
+ */
+#include <stdio.h>
+#include <unistd.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <string.h>
+#include <stdlib.h>
+
+
+#ifndef PATH_MAX
+# define PATH_MAX 4096
+#endif
+#ifndef DEVDIR
+# define DEVDIR "/dev"
+#endif
+#ifndef SYSDIR
+# define SYSDIR "/sys"
+#endif
+
+
+#define LIST_0_9(P) P"0\n", P"1\n", P"2\n", P"3\n", P"4\n", P"5\n", P"6\n", P"7\n", P"8\n", P"9\n"
+static const char* inttable[] =
+ {
+ LIST_0_9(""), LIST_0_9("1"), LIST_0_9("2"), LIST_0_9("3"), LIST_0_9("4"),
+ LIST_0_9("5"), LIST_0_9("6"), LIST_0_9("7"), LIST_0_9("8"), LIST_0_9("9"),
+
+ LIST_0_9("10"), LIST_0_9("11"), LIST_0_9("12"), LIST_0_9("13"), LIST_0_9("14"),
+ LIST_0_9("15"), LIST_0_9("16"), LIST_0_9("17"), LIST_0_9("18"), LIST_0_9("19"),
+
+ LIST_0_9("20"), LIST_0_9("21"), LIST_0_9("22"), LIST_0_9("23"), LIST_0_9("24"),
+ "250\n", "251\n", "252\n", "253\n", "254\n", "255\n"
+ };
+
+
+static int save_pnm(const char* fbpath, int fbno, int fd)
+{
+ char buf[PATH_MAX];
+ FILE* file;
+ int saved_errno, sizefd, fbfd, r, g, b;
+ ssize_t got, off;
+
+ sprintf(buf, SYSDIR "/class/graphics/fb%i/virtual_size", fbno);
+ if (sizefd = open(buf, O_RDONLY), sizefd < 0)
+ return -1;
+
+ if (got = read(sizefd, buf, sizeof(buf) / sizeof(char) - 1), got < 0)
+ return saved_errno = errno, close(sizefd), errno = saved_errno, -1;
+ close(sizefd);
+ buf[got] = '\0';
+ *strchr(buf, ',') = ' ';
+
+ fbfd = open(fbpath, O_RDONLY);
+ if (fbfd < 0)
+ return -1;
+
+ file = fdopen(fd, "w");
+ if (file == NULL)
+ return saved_errno = errno, close(fbfd), errno = saved_errno, -1;
+ fprintf(file, "P3\n%s255\n", buf);
+
+ for (off = 0;;)
+ {
+ got = read(fbfd, buf + off, sizeof(buf) - off * sizeof(char));
+ if (got < 0)
+ return saved_errno = errno, fclose(file), close(fbfd), errno = saved_errno, -1;
+ if (got += off, got == 0)
+ break;
+
+ for (off = 0; off < got; off += 4)
+ {
+ r = buf[off + 2] & 255;
+ g = buf[off + 1] & 255;
+ b = buf[off + 0] & 255;
+ fprintf(file, "%s%s%s", inttable[r], inttable[g], inttable[b]);
+ }
+ if (off != got)
+ {
+ off -= 4;
+ memcpy(buf, buf + off, (got - off) * sizeof(char));
+ off = got - off;
+ }
+ else
+ off = 0;
+ }
+
+ fflush(file);
+ fclose(file);
+ close(fbfd);
+ return 0;
+}
+
+
+static int save(const char* fbpath, const char* imgpath, int fbno, const char* execname)
+{
+ int pipe_rw[2];
+ pid_t pid, reaped;
+ int saved_errno, status;
+
+ if (pipe(pipe_rw) < 0)
+ return -1;
+
+ if (pid = fork(), pid == -1)
+ return saved_errno = errno, close(pipe_rw[0]), close(pipe_rw[1]), errno = saved_errno, -1;
+
+ if (pid == 0)
+ {
+ close(pipe_rw[1]);
+ if (pipe_rw[0] != STDIN_FILENO)
+ {
+ close(STDIN_FILENO);
+ dup2(pipe_rw[0], STDIN_FILENO);
+ close(pipe_rw[0]);
+ }
+ execlp("convert", "convert", DEVDIR "/stdin", imgpath, NULL);
+ perror(execname);
+ exit(1);
+ }
+
+ close(pipe_rw[0]);
+
+ if (save_pnm(fbpath, fbno, pipe_rw[1]) < 0)
+ return saved_errno = errno, close(pipe_rw[1]), errno = saved_errno, -1;
+
+ close(pipe_rw[1]);
+
+ reaped = 0;
+ while (reaped != pid)
+ {
+ reaped = waitpid(pid, &status, 0);
+ if (reaped < 0)
+ return -1;
+ }
+
+ return status == 0 ? 0 : -1;
+}
+
+
+int main(int argc, char* argv[])
+{
+ char fbpath[PATH_MAX];
+ char imgpath[PATH_MAX];
+ int i, fbno;
+
+ (void) argc;
+
+ for (fbno = 0;; fbno++)
+ {
+ sprintf(fbpath, DEVDIR "/fb%i", fbno);
+ if (access(fbpath, F_OK))
+ break;
+
+ sprintf(imgpath, "fb%i.png", fbno);
+ if (access(imgpath, F_OK) == 0)
+ for (i = 2;; i++)
+ {
+ sprintf(imgpath, "fb%i.png.%i", fbno, i);
+ if (access(imgpath, F_OK))
+ break;
+ }
+
+ if (save(fbpath, imgpath, fbno, *argv) < 0)
+ return perror(*argv), 1;
+ fprintf(stderr, "Saved framebuffer %i to %s\n", fbno, imgpath);
+ }
+
+ return 0;
+}
+