1 files changed, 59 insertions, 0 deletions
diff --git a/frontends/calculator/CEdev/examples/gfx_light_dark/src/main.c b/frontends/calculator/CEdev/examples/gfx_light_dark/src/main.c
new file mode 100644
index 0000000..d4c0a06
--- /dev/null
+++ b/frontends/calculator/CEdev/examples/gfx_light_dark/src/main.c
@@ -0,0 +1,59 @@
+#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 color gfx_RGBTo1555(34, 55, 89)
+
+void main(void) {
+    uint8_t i = 0;
+
+    /* Initialize the 8bpp graphics */
+    gfx_Begin();
+
+    /* For i in 0..255 */
+    do {
+
+        /* Fade out to black */
+        gfx_palette[0] = gfx_Darken(color, i);
+        /* Fade in from black */
+        gfx_palette[1] = gfx_Darken(color, ~i);
+        /* Fade in from white */
+        gfx_palette[3] = gfx_Lighten(color, ~i);
+        /* Fade out to white */
+        gfx_palette[2] = gfx_Lighten(color, i);
+
+        /* Fade out to black */
+        gfx_SetColor(0);
+        gfx_FillRectangle_NoClip(0, 0, 160, 120);
+        /* Fade in from black */
+        gfx_SetColor(1);
+        gfx_FillRectangle_NoClip(160, 0, 160, 120);
+        /* Fade in from white */
+        gfx_SetColor(2);
+        gfx_FillRectangle_NoClip(0, 120, 160, 120);
+        /* Fade out to white */
+        gfx_SetColor(3);
+        gfx_FillRectangle_NoClip(160, 120, 160, 120);
+
+        /* Wait for a keypress at the start of each quarter of the fade */
+        if (!(i & 0x3f)) {
+            while (!os_GetCSC());
+        }
+
+    /* Loop until i is 0 again because of 8 bit range */
+    } while (++i);
+
+    /* Wait for a keypress */
+    while (!os_GetCSC());
+
+    /* Usual cleanup */
+    gfx_End();
+}