1 files changed, 68 insertions, 0 deletions
diff --git a/src/kern.h b/src/kern.h
new file mode 100644
index 0000000..69eaf0b
--- /dev/null
+++ b/src/kern.h
@@ -0,0 +1,68 @@
+/**
+ * scrotty — Screenshot program for Linux's TTY
+ * 
+ * Copyright © 2014, 2015  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/>.
+ */
+
+
+/**
+ * Stop when `try_alt_fbpath` (in scrotty.c) reaches this value.
+ */
+extern const int alt_fbpath_limit;
+
+
+/**
+ * This is called if no framebuffer is found.
+ * 
+ * It prints a message describing this condition
+ * and suggests how to resolve it.
+ */
+void print_not_found_help (void);
+
+/**
+ * Construct the path to a framebuffer device.
+ * 
+ * @param  pathbuf  Ouput buffer for the path.
+ * @param  altpath  The index of the alternative path-pattern to use.
+ * @param  fbno     The index of the framebuffer.
+ */
+void get_fbpath (char *pathbuf, int altpath, int fbno);
+
+/**
+ * Get the dimensions of a framebuffer.
+ * 
+ * @param   fbno    The number of the framebuffer.
+ * @param   fbpath  The path to the framebuffer device..
+ * @param   width   Output parameter for the width of the image.
+ * @param   height  Output parameter for the height of the image.
+ * @return          Zero on success, -1 on error.
+ */
+int measure (int fbno, char *fbpath, long *width, long *height);
+
+/**
+ * Convert read data from a framebuffer to PNM pixel data.
+ * 
+ * @param   file        The output image file.
+ * @param   buf         Buffer with read data.
+ * @param   n           The number of read characters.
+ * @param   adjustment  Set to zero if all bytes were converted
+ *                      (a whole number of pixels where available,)
+ *                      otherwise, set to the number of bytes a
+ *                      pixel is encoded.
+ * @return              Zero on success, -1 on error.
+ */
+int convert_fb (FILE *file, char *buf, size_t n, size_t *adjustment);
+