graphics: fixed pixels not plotting on non crt_color

assets/bw_r8_to_bits.c

@@ -0,0 +1,44 @@
+#include <stdio.h>
+#include <stdint.h>
+#include <string.h>
+
+char word_to_byte(char * inbuf) {
+    return
+        ((*(inbuf + 0) & 1) << 7) | 
+        ((*(inbuf + 1) & 1) << 6) |
+        ((*(inbuf + 2) & 1) << 5) | 
+        ((*(inbuf + 3) & 1) << 4) | 
+        ((*(inbuf + 4) & 1) << 3) | 
+        ((*(inbuf + 5) & 1) << 2) | 
+        ((*(inbuf + 6) & 1) << 1) | 
+        ((*(inbuf + 7) & 1) << 0);
+}
+
+
+int main(int argc, char const *argv[]) {
+    FILE * infile;
+    FILE * outfile;
+    char word[8];
+    
+    infile = fopen(argv[1], "r");
+    outfile = fopen(argv[2], "w");
+
+    int exit = -1;
+    while (exit < 0) {
+        for (int i = 0; i < 8; i++) {
+            int b = fgetc(infile);
+            if (b == -1 && exit < 0) exit = i;
+            word[i] = (char) b;
+        }
+        
+        if (exit == 0) break; // if the first byte is EOF, do not write out
+        
+        fputc(word_to_byte(word), outfile);
+    }
+    
+    fflush(outfile);
+    fclose(infile);
+    fclose(outfile);
+    
+    return 0;
+}