add opengl fronend, remove sdl frontend, refactor build system

1 files changed, 46 insertions, 0 deletions

diff --git a/frontends/calculator/CEdev/examples/gfx_hello_world/src/main.c b/frontends/calculator/CEdev/examples/gfx_hello_world/src/main.c
new file mode 100644
index 0000000..852120e
--- /dev/null
+++ b/frontends/calculator/CEdev/examples/gfx_hello_world/src/main.c
@@ -0,0 +1,46 @@
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <tice.h>
+
+#include <math.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <graphx.h>
+
+#define FONT_HEIGHT 8
+
+/* Function prototypes */
+void print_string_centered(const char *str);
+
+void main(void) {
+    const char *msg = "Hello World!";
+
+    /* Seed the random numbers */
+    srand(rtc_Time());
+
+    /* Initialize the 8bpp graphics */
+    gfx_Begin();
+
+    /* Fill the screen black */
+    gfx_FillScreen(gfx_black);
+
+    /* Set the random text color */
+    gfx_SetTextFGColor(randInt(1, 255));
+
+    /* Print the message on the screen */
+    print_string_centered(msg);
+
+    /* Wait for a key to be pressed */
+    while (!os_GetCSC());
+
+    /* Close the graphics */
+    gfx_End();
+}
+
+/* Prints a screen centered string */
+void print_string_centered(const char *str) {
+    gfx_PrintStringXY(str, (LCD_WIDTH - gfx_GetStringWidth(str)) / 2, (LCD_HEIGHT - FONT_HEIGHT) / 2);
+}