Ensure cursor is not showing when running

2 files changed, 21 insertions, 1 deletions

diff --git a/Makefile b/Makefile
index 53d756b..5face8f 100644
--- a/Makefile
+++ b/Makefile
@@ -30,6 +30,8 @@ $(BUILD_DIR):
         mkdir -p $(BUILD_DIR)
 
 run: $(BIN)
+        # NOTE: This should probably be done on the C code.
+        echo 0 > /sys/class/graphics/fbcon/cursor_blink
         ./$(BIN)
 
 clean:
diff --git a/src/main.c b/src/main.c
index e3e8b77..b5247af 100644
--- a/src/main.c
+++ b/src/main.c
@@ -2,6 +2,7 @@
 #include<stdlib.h>
 #include<stdint.h>
 #include<stdbool.h>
+#include<unistd.h>
 #include<fcntl.h>
 #include<linux/fb.h>
 #include<sys/ioctl.h>
@@ -30,14 +31,31 @@ main(void) {
                 fprintf(stderr, "couldn't mmap the framebuffer\n");
                 exit(EXIT_FAILURE);
         }
+
+        // Main loop.
         uint8_t shade = 0;
+        size_t counter = 0;
+        size_t direction = 1;
         while (true) {
                 for (size_t j = 0; j < height; j++) {
                         for (size_t i = 0; i < width; i++) {
                                 buf[j * width + i] = shade;
                         }
                 }
-                shade++;
+                counter++;
+                if (counter > 10) {
+                        shade += direction;
+                        counter = 0;
+                }
+                if (shade == 0xFF) {
+                        direction = -1;
+                } else if (shade == 0x00) {
+                        direction = 1;
+                }
         }
+
+        // Cleanup.
+        munmap(buf, len);
+        close(fb);
         return 0;
 }