5 files changed, 147 insertions, 0 deletions
diff --git a/frontends/calculator/CEdev/examples/gfx_light_dark/autotester.json b/frontends/calculator/CEdev/examples/gfx_light_dark/autotester.json
new file mode 100644
index 0000000..772c268
--- /dev/null
+++ b/frontends/calculator/CEdev/examples/gfx_light_dark/autotester.json
@@ -0,0 +1,63 @@
+{
+  "rom": "84pce_515.rom",
+  "transfer_files": [
+    "bin/DEMO.8xp"
+  ],
+  "target": {
+    "name": "DEMO",
+    "isASM": true
+  },
+  "sequence": [
+    "action|launch", "delay|300", "hash|rectangles", "hash|palette_0",
+    "key|enter", "delay|1000", "hash|palette_25",
+    "key|enter", "delay|1000", "hash|palette_50",
+    "key|enter", "delay|1000", "hash|palette_75",
+    "key|enter", "delay|1000", "hash|palette_100",
+    "key|enter", "delay|300", "hash|after_exit"
+  ],
+  "hashes": {
+    "rectangles": {
+      "description": "Test rectangles",
+      "start": "vram_start",
+      "size": "vram_8_size",
+      "expected_CRCs": [ "328D511E" ]
+    },
+    "palette_0": {
+      "description": "Test lighten/darken fade, 0% progress",
+      "start": "lcdPalette",
+      "size": "8",
+      "expected_CRCs": [ "41C3BFF8" ]
+    },
+    "palette_25": {
+      "description": "Test lighten/darken fade, 25% progress",
+      "start": "lcdPalette",
+      "size": "8",
+      "expected_CRCs": [ "5F64F889" ]
+    },
+    "palette_50": {
+      "description": "Test lighten/darken fade, 50% progress",
+      "start": "lcdPalette",
+      "size": "8",
+      "expected_CRCs": [ "C48CEF7C" ]
+    },
+    "palette_75": {
+      "description": "Test lighten/darken fade, 75% progress",
+      "start": "lcdPalette",
+      "size": "8",
+      "expected_CRCs": [ "81FEDD4E" ]
+    },
+    "palette_100": {
+      "description": "Test lighten/darken fade, 100% progress",
+      "start": "lcdPalette",
+      "size": "8",
+      "expected_CRCs": [ "B451E096" ]
+    },
+    "after_exit": {
+      "description": "Back to the home screen (exit check)",
+      "start": "vram_start",
+      "size": "vram_16_size",
+      "expected_CRCs": [ "FFAF89BA", "101734A5" ]
+    }
+  }
+}
+
diff --git a/frontends/calculator/CEdev/examples/gfx_light_dark/makefile b/frontends/calculator/CEdev/examples/gfx_light_dark/makefile
new file mode 100644
index 0000000..1f1b36b
--- /dev/null
+++ b/frontends/calculator/CEdev/examples/gfx_light_dark/makefile
@@ -0,0 +1,15 @@
+# ----------------------------
+# Set NAME to the program name
+# Set ICON to the png icon file name
+# Set DESCRIPTION to display within a compatible shell
+# Set COMPRESSED to "YES" to create a compressed program
+# ----------------------------
+
+NAME        ?= DEMO
+COMPRESSED  ?= NO
+ICON        ?= iconc.png
+DESCRIPTION ?= "C SDK Demo"
+
+# ----------------------------
+
+include $(CEDEV)/include/.makefile
diff --git a/frontends/calculator/CEdev/examples/gfx_light_dark/readme.md b/frontends/calculator/CEdev/examples/gfx_light_dark/readme.md
new file mode 100644
index 0000000..e429c6c
--- /dev/null
+++ b/frontends/calculator/CEdev/examples/gfx_light_dark/readme.md
@@ -0,0 +1,10 @@
+### GraphX Lighten and Darken Demo
+
+Demonstrates rectangle drawing and using gfx_Darken and gfx_Lighten to modify colors in the palette to implement fade effects.
+
+![Screenshot](screenshot.gif)
+
+---
+
+This demo is a part of the C SDK Toolchain for use on the CE.
+
diff --git a/frontends/calculator/CEdev/examples/gfx_light_dark/screenshot.gif b/frontends/calculator/CEdev/examples/gfx_light_dark/screenshot.gif
new file mode 100644
index 0000000..8470736
--- /dev/null
+++ b/frontends/calculator/CEdev/examples/gfx_light_dark/screenshot.gif
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();
+}