add regression test for clipped transparent text

Author: mateoconlechuga

test/regression/bug0004/autotest.json

@@ -0,0 +1,39 @@
+{
+  "transfer_files": [
+    "bin/DEMO.8xp"
+  ],
+  "target": {
+    "name": "DEMO",
+    "isASM": true
+  },
+  "sequence": [
+    "action|launch",
+    "delay|200",
+    "hashWait|1",
+    "key|enter",
+    "delay|300",
+    "hashWait|2"
+  ],
+  "hashes": {
+    "1": {
+      "description": "Show Hello World message",
+      "start": "vram_start",
+      "size": "vram_8_size",
+      "expected_CRCs": [
+        "BA7F449D"
+      ]
+    },
+    "2": {
+      "description": "Exit",
+      "start": "vram_start",
+      "size": "vram_16_size",
+      "expected_CRCs": [
+        "FFAF89BA",
+        "101734A5",
+        "9DA19F44",
+        "A32840C8",
+        "349F4775"
+      ]
+    }
+  }
+}

test/regression/bug0004/makefile

@@ -0,0 +1,16 @@
+# ----------------------------
+# Makefile Options
+# ----------------------------
+
+NAME = DEMO
+ICON = icon.png
+DESCRIPTION = "CE C Toolchain Demo"
+COMPRESSED = NO
+ARCHIVED = NO
+
+CFLAGS = -Wall -Wextra -Oz
+CXXFLAGS = -Wall -Wextra -Oz
+
+# ----------------------------
+
+include $(shell cedev-config --makefile)

test/regression/bug0004/src/main.c

@@ -0,0 +1,28 @@
+#include <ti/screen.h>
+#include <ti/getcsc.h>
+#include <graphx.h>
+
+int main(void)
+{
+    bool clip = false;
+
+    gfx_Begin();
+
+    gfx_FillScreen(0x07);
+    gfx_SetTransparentColor(0x18);
+    gfx_SetTextTransparentColor(0xE0);
+    gfx_SetTextBGColor(0x18);
+    gfx_SetTextFGColor(0xE0);
+
+    for (const char *c = "Hello, world!"; *c != '\0'; ++c, clip = !clip)
+    {
+        gfx_SetTextConfig(clip ? gfx_text_clip : gfx_text_noclip);
+        gfx_PrintChar(*c);
+    }
+
+    while (!os_GetCSC());
+
+    gfx_End();
+
+    return 0;
+}