REVIEWED: example: text_unicode_ranges

Author: raysan5

examples/text/text_unicode_font.c

@@ -0,0 +1,183 @@
+/*******************************************************************************************
+*
+*   raylib [text] example - unicode ranges
+*
+*   Example complexity rating: [★★★★] 4/4
+*
+*   Example originally created with raylib 2.5, last time updated with raylib 4.0
+*
+*   Example contributed by Vlad Adrian (@demizdor) and reviewed by Ramon Santamaria (@raysan5)
+*
+*   Example licensed under an unmodified zlib/libpng license, which is an OSI-certified,
+*   BSD-like license that allows static linking with closed source software
+*
+*   Copyright (c) 2019-2025 Vlad Adrian (@demizdor) and Ramon Santamaria (@raysan5)
+*
+********************************************************************************************/
+
+#include "raylib.h"
+
+#include <stdlib.h>
+
+typedef struct {
+    int* data;
+    int count;
+    int capacity;
+} CodepointsArray;
+
+//--------------------------------------------------------------------------------------
+// Module functions declaration
+//--------------------------------------------------------------------------------------
+static void AddRange(CodepointsArray* array, int start, int stop);
+static Font LoadUnicodeFont(const char* fileName, int fontSize);
+
+//------------------------------------------------------------------------------------
+// Program main entry point
+//------------------------------------------------------------------------------------
+int main(void)
+{
+    // Initialization
+    //--------------------------------------------------------------------------------------
+    const int screenWidth = 800;
+    const int screenHeight = 450;
+
+    InitWindow(screenWidth, screenHeight, "raylib [text] example - unicode ranges");
+
+    // Load font with Unicode support
+    Font fontUni = LoadUnicodeFont("resources/NotoSansTC-Regular.ttf", 32);
+    SetTextureFilter(fontUni.texture, TEXTURE_FILTER_BILINEAR);
+
+    SetTargetFPS(60);               // Set our game to run at 60 frames-per-second
+    //--------------------------------------------------------------------------------------
+
+    // Main loop
+    while (!WindowShouldClose())    // Detect window close button or ESC key
+    {
+        // Update
+        //----------------------------------------------------------------------------------
+        //...
+        //----------------------------------------------------------------------------------
+
+        // Draw
+        //----------------------------------------------------------------------------------
+        BeginDrawing();
+        
+            ClearBackground(RAYWHITE);
+            
+            // Render test strings in different languages
+            DrawTextEx(fontUni, "English: Hello World!", (Vector2){ 50, 50 }, 32, 1, DARKGRAY); // English
+            DrawTextEx(fontUni, "Español: Hola mundo!", (Vector2){ 50, 100 }, 32, 1, DARKGRAY); // Spanish
+            DrawTextEx(fontUni, "Ελληνικά: Γειά σου κόσμε!", (Vector2){ 50, 150 }, 32, 1, DARKGRAY); // Greek
+            DrawTextEx(fontUni, "Русский: Привет мир!", (Vector2){ 50, 200 }, 32, 0, DARKGRAY); // Russian
+            DrawTextEx(fontUni, "中文: 你好世界!", (Vector2){ 50, 250 }, 32, 1, DARKGRAY);        // Chinese
+            DrawTextEx(fontUni, "日本語: こんにちは世界!", (Vector2){ 50, 300 }, 32, 1, DARKGRAY);   // Japanese
+            DrawTextEx(fontUni, "देवनागरी: होला मुंडो!", (Vector2){ 50, 350 }, 32, 1, DARKGRAY);     // Devanagari
+            
+            DrawRectangle(400, 16, 380, 400, BLACK);
+            DrawTexturePro(fontUni.texture, (Rectangle){ 0, 0, fontUni.texture.width, fontUni.texture.height },
+                (Rectangle){ 400, 16, 380, 400 }, (Vector2){ 0, 0 }, 0.0f, WHITE);
+
+            // Display font attribution
+            DrawText("Font: Noto Sans TC. License: SIL Open Font License 1.1", screenWidth - 300, screenHeight - 20, 10, GRAY);
+            
+        EndDrawing();
+        //----------------------------------------------------------------------------------
+    }
+
+    // De-Initialization
+    //--------------------------------------------------------------------------------------
+    UnloadFont(fontUni);        // Unload font resource
+
+    CloseWindow();              // Close window and OpenGL context
+    //--------------------------------------------------------------------------------------
+
+    return 0;
+}
+
+//--------------------------------------------------------------------------------------
+// Module functions definition
+//--------------------------------------------------------------------------------------
+static void AddRange(CodepointsArray* array, int start, int stop)
+{
+    int rangeSize = stop - start + 1;
+    
+    if ((array->count + rangeSize) > array->capacity)
+    {
+        array->capacity = array->count + rangeSize + 1024;
+        array->data = (int *)MemRealloc(array->data, array->capacity*sizeof(int));
+        
+        if (!array->data)
+        {
+            TraceLog(LOG_ERROR, "FONTUTIL: Memory allocation failed");
+            exit(1);
+        }
+    }
+    
+    for (int i = start; i <= stop; i++) array->data[array->count++] = i;
+}
+
+Font LoadUnicodeFont(const char *fileName, int fontSize)
+{
+    CodepointsArray cp = { 0 };
+    cp.capacity = 2048;
+    cp.data = (int *)MemAlloc(cp.capacity*sizeof(int));
+
+    if (!cp.data)
+    {
+        TraceLog(LOG_ERROR, "FONTUTIL: Initial allocation failed");
+        return GetFontDefault();
+    }
+
+    // Unicode range: Basic ASCII
+    AddRange(&cp, 32, 126);
+
+    // Unicode range: European Languages
+    AddRange(&cp, 0xC0, 0x17F);
+    AddRange(&cp, 0x180, 0x24F);
+    AddRange(&cp, 0x1E00, 0x1EFF);
+    AddRange(&cp, 0x2C60, 0x2C7F);
+
+    // Unicode range: Greek
+    AddRange(&cp, 0x370, 0x3FF);
+    AddRange(&cp, 0x1F00, 0x1FFF);
+
+    // Unicode range: Cyrillic
+    AddRange(&cp, 0x400, 0x4FF);
+    AddRange(&cp, 0x500, 0x52F);
+    AddRange(&cp, 0x2DE0, 0x2DFF);
+    AddRange(&cp, 0xA640, 0xA69F);
+
+    // Unicode range: CJK
+    AddRange(&cp, 0x4E00, 0x9FFF);
+    AddRange(&cp, 0x3400, 0x4DBF);
+    AddRange(&cp, 0x3000, 0x303F);
+    AddRange(&cp, 0x3040, 0x309F);
+    AddRange(&cp, 0x30A0, 0x30FF);
+    AddRange(&cp, 0x31F0, 0x31FF);
+    AddRange(&cp, 0xFF00, 0xFFEF);
+    AddRange(&cp, 0xAC00, 0xD7AF);
+    AddRange(&cp, 0x1100, 0x11FF);
+
+    // Unicode range: Other
+    // WARNING: Not available on provided font
+    AddRange(&cp, 0x900, 0x97F);  // Devanagari
+    AddRange(&cp, 0x600, 0x6FF);  // Arabic
+    AddRange(&cp, 0x5D0, 0x5EA);  // Hebrew
+
+    Font font = {0};
+    
+    if (FileExists(fileName))
+    {
+        font = LoadFontEx(fileName, fontSize, cp.data, cp.count);
+    }
+    
+    if (font.texture.id == 0)
+    {
+        font = GetFontDefault();
+        TraceLog(LOG_WARNING, "FONTUTIL: Using default font");
+    }
+
+    MemFree(cp.data);
+    
+    return font;
+}