[example] Add text rotate api example.

CMakeLists.txt

@@ -111,7 +111,9 @@ if(RTEXTJP_BUILD_EXAMPLES)
         04_vertical_writing
         05_text_input
         06_utf8_tools
-        07_character_sets)
+        07_character_sets
+        08_text_rotate
+    )
 
     foreach(example IN LISTS RTEXTJP_EXAMPLE_SOURCES)
         add_executable(rtextjp_${example} "examples/${example}.c")

examples/08_text_rotate.c

@@ -0,0 +1,113 @@
+#include "raylib.h"
+
+#define RTEXTJP_IMPLEMENTATION
+#include "rtextjp.h"
+
+int main(void)
+{
+    const int screenWidth = 1280;
+    const int screenHeight = 720;
+
+    InitWindow(screenWidth, screenHeight, "RTextJP DrawEx Test");
+    SetTargetFPS(60);
+
+    // JIS X 0208:
+    // 非漢字 + 第1水準 + 第2水準
+    Font font = RTextJPLoadFontFromCharacterSet(
+        "resources/japanese.ttf",
+        48,
+        RTEXTJP_CHARACTER_SET_JIS_X_0208,
+        NULL
+    );
+
+    if (!IsFontValid(font))
+    {
+        TraceLog(LOG_ERROR, "Failed to load Japanese font.");
+        CloseWindow();
+        return 1;
+    }
+
+    RTextJPStyle style =
+        RTextJPStyleDefault(font, 48.0f, WHITE);
+
+    while (!WindowShouldClose())
+    {
+        BeginDrawing();
+
+        ClearBackground((Color) { 30, 30, 30, 255 });
+
+        // =========================================================
+        // rotation = 0
+        // =========================================================
+
+        Vector2 position0 = { 300.0f, 150.0f };
+        Vector2 origin0 = position0;
+
+        DrawCircleV(origin0, 5.0f, RED);
+
+        RTextJPDraw("RTextJP 日本語 TEST NORMAL Draw API", (Vector2){300.f,70.f}, style);
+
+        RTextJPDrawEx(
+            "RTextJP 日本語 TEST",
+            position0,
+            origin0,
+            0.0f,
+            48.0f,
+            2.0f,
+            style
+        );
+
+        // =========================================================
+        // rotation = 15
+        // =========================================================
+
+        Vector2 position15 = { 300.0f, 300.0f };
+        Vector2 origin15 = position15;
+
+        DrawCircleV(origin15, 5.0f, RED);
+
+        RTextJPDrawEx(
+            "RTextJP 日本語 TEST",
+            position15,
+            origin15,
+            15.0f,
+            48.0f,
+            2.0f,
+            style
+        );
+
+        // =========================================================
+        // rotation = 45
+        // =========================================================
+
+        Vector2 position45 = { 300.0f, 500.0f };
+        Vector2 origin45 = position45;
+
+        DrawCircleV(origin45, 5.0f, RED);
+
+        RTextJPDrawEx(
+            "RTextJP 日本語 TEST",
+            position45,
+            origin45,
+            45.0f,
+            48.0f,
+            2.0f,
+            style
+        );
+
+        DrawText(
+            "Red point = rotation origin",
+            20,
+            20,
+            20,
+            LIGHTGRAY
+        );
+
+        EndDrawing();
+    }
+
+    UnloadFont(font);
+    CloseWindow();
+
+    return 0;
+}