From f918ec37ffb7f8c8498f4478ec783ca8c495b864 Mon Sep 17 00:00:00 2001
From: June McEnroe <june@causal.agency>
Date: Sat, 3 Feb 2018 14:53:06 -0500
Subject: Separate gfxx and its framebuffer frontend

---
 bin/gfxx.c | 98 ++++----------------------------------------------------------
 1 file changed, 5 insertions(+), 93 deletions(-)

(limited to 'bin/gfxx.c')

diff --git a/bin/gfxx.c b/bin/gfxx.c
index 2b2f803c..7a3f24df 100644
--- a/bin/gfxx.c
+++ b/bin/gfxx.c
@@ -15,102 +15,14 @@
  */
 
 #include <err.h>
-#include <fcntl.h>
-#include <linux/fb.h>
-#include <stdint.h>
-#include <stdlib.h>
-#include <sys/ioctl.h>
-#include <sys/mman.h>
-#include <sysexits.h>
-#include <termios.h>
-#include <unistd.h>
-
-static int init(int argc, char *argv[]);
-static void draw(uint32_t *buf, size_t xres, size_t yres);
-static void input(char in);
-
-static uint32_t *buf;
-static struct fb_var_screeninfo info;
-
-static uint32_t saveBg;
-static void restoreBg(void) {
-    for (size_t i = 0; i < info.xres * info.yres; ++i) {
-        buf[i] = saveBg;
-    }
-}
-
-static struct termios saveTerm;
-static void restoreTerm(void) {
-    tcsetattr(STDERR_FILENO, TCSADRAIN, &saveTerm);
-}
-
-int main(int argc, char *argv[]) {
-    int error;
-
-    error = init(argc, argv);
-    if (error) return error;
-
-    const char *path = getenv("FRAMEBUFFER");
-    if (!path) path = "/dev/fb0";
-
-    int fb = open(path, O_RDWR);
-    if (fb < 0) err(EX_OSFILE, "%s", path);
-
-    error = ioctl(fb, FBIOGET_VSCREENINFO, &info);
-    if (error) err(EX_IOERR, "%s", path);
-
-    size_t size = 4 * info.xres * info.yres;
-    buf = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, fb, 0);
-    if (buf == MAP_FAILED) err(EX_IOERR, "%s", path);
-
-    saveBg = buf[0];
-    atexit(restoreBg);
-
-    error = tcgetattr(STDERR_FILENO, &saveTerm);
-    if (error) err(EX_IOERR, "tcgetattr");
-    atexit(restoreTerm);
-
-    struct termios term = saveTerm;
-    term.c_lflag &= ~(ICANON | ECHO);
-    error = tcsetattr(STDERR_FILENO, TCSADRAIN, &term);
-    if (error) err(EX_IOERR, "tcsetattr");
-
-    for (;;) {
-        draw(buf, info.xres, info.yres);
-
-        char in;
-        ssize_t len = read(STDERR_FILENO, &in, 1);
-        if (len < 0) err(EX_IOERR, "read");
-        if (!len) return EX_DATAERR;
-
-        input(in);
-    }
-}
-
-// ABSTRACTION LINE
-
-/* Copyright (c) 2018, June McEnroe <programble@gmail.com>
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Affero 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 Affero General Public License for more details.
- *
- * You should have received a copy of the GNU Affero General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-
 #include <stdbool.h>
 #include <stdint.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <sys/stat.h>
+#include <sysexits.h>
+#include <unistd.h>
 
 #define RGB(r,g,b) ((uint32_t)(r) << 16 | (uint32_t)(g) << 8 | (uint32_t)(b))
 #define GRAY(n)    RGB(n, n, n)
@@ -150,7 +62,7 @@ static uint8_t get(size_t i) {
     }
 }
 
-static /**/ int init(int argc, char *argv[]) {
+extern int init(int argc, char *argv[]) {
     const char *path = NULL;
     const char *palPath = NULL;
 
@@ -334,7 +246,7 @@ static void draw32(struct Pos *pos) {
     }
 }
 
-static /**/ void draw(uint32_t *buf, size_t xres, size_t yres) {
+extern void draw(uint32_t *buf, size_t xres, size_t yres) {
     memset(buf, 0, 4 * xres * yres);
     struct Pos pos = {
         .buf = buf,
@@ -351,7 +263,7 @@ static /**/ void draw(uint32_t *buf, size_t xres, size_t yres) {
     }
 }
 
-static /**/ void input(char in) {
+extern void input(char in) {
     size_t pixel = (bits + 7) / 8;
     size_t row = width * bits / 8;
     switch (in) {
-- 
cgit 1.4.1