direct mode RGB PoC

src/poc/dirgb.c

@@ -0,0 +1,41 @@
+#include <stdio.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+#include <locale.h>
+#include <notcurses.h>
+
+// direct-mode generation of 4096 RGB foregrounds
+int main(void){
+  if(!setlocale(LC_ALL, "")){
+    return EXIT_FAILURE;
+  }
+  notcurses_options nopts;
+  memset(&nopts, 0, sizeof(nopts));
+  nopts.inhibit_alternate_screen = true;
+  struct notcurses* nc = notcurses_init(&nopts, stdout);
+  if(!nc){
+    return EXIT_FAILURE;
+  }
+  for(int r = 0 ; r < 256 ; r += 16){
+    for(int g = 0 ; g < 256 ; g += 16){
+      for(int b = 0 ; b < 256 ; b += 16){
+        int ret = term_fg_rgb8(nc, stdout, r, g, b);
+        if(ret){
+          notcurses_stop(nc);
+          return EXIT_FAILURE;
+        }
+        printf("X");
+        if(fflush(stdout) == EOF){
+          fprintf(stderr, "Error flushing stdout (%s)\n", strerror(errno));
+          return EXIT_FAILURE;
+        }
+      }
+    }
+  }
+  printf("\n");
+  if(notcurses_stop(nc)){
+    return EXIT_FAILURE;
+  }
+  return EXIT_SUCCESS;
+}