add opengl fronend, remove sdl frontend, refactor build system

1 files changed, 36 insertions, 0 deletions

diff --git a/frontends/calculator/CEdev/examples/os_input/src/main.c b/frontends/calculator/CEdev/examples/os_input/src/main.c
new file mode 100644
index 0000000..7674897
--- /dev/null
+++ b/frontends/calculator/CEdev/examples/os_input/src/main.c
@@ -0,0 +1,36 @@
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <tice.h>
+
+/* Make sure to adjust those sizes according to your usage! */
+#define INPUT_SIZE  10
+#define RESP_SIZE   20
+
+/* Draw text on the homescreen at the given X/Y location */
+void print(const char* text, uint8_t xpos, uint8_t ypos) {
+    os_SetCursorPos(ypos, xpos);
+    os_PutStrFull(text);
+}
+
+void main(void) {
+    char inputBuffer[INPUT_SIZE];
+    char response[RESP_SIZE];
+
+    /* Clear the homescreen */
+    os_ClrHome();
+
+    /* Ask the user to type a string, which gets stored in `inputBuf` */
+    os_GetStringInput("What is N? ", inputBuffer, INPUT_SIZE);
+
+    /* Build the user response */
+    sprintf(response, "N is %s.", inputBuffer);
+
+    /* Clear the homescreen and display the built response */
+    os_ClrHome();
+    print(response, 0, 0);
+
+    /* Wait for a key press before quitting */
+    while (!os_GetCSC());
+}