How to show CJK chars or fonts in raylib

[wlxmhls]

Hello. Is there any examples to show CJK chars/fonts in raylib?
Wish your help.

[wlxmhls]

I find the sample code:

#include <raylib.h>


int main(void)
{
    InitWindow(800, 600, "世界你好！");

    // read font file
    unsigned int   fileSize = 0;
    unsigned char *fileData = LoadFileData("./SimHei.ttf", &fileSize);

    SetTraceLogLevel(LOG_WARNING);
    SetTargetFPS(60);

    while (!WindowShouldClose())
    {
        //cjk characters in utf-8
        char text[] = "世界，你好！";

        //get code points of text
        int codepointCount = 0;
        int *codepoints = LoadCodepoints(text, &codepointCount);

        //read font based on code points
        Font font = LoadFontFromMemory(".ttf", fileData, fileSize, 32, codepoints, codepointCount);

        //free
        UnloadCodepoints(codepoints);

        //draw
        BeginDrawing();
            ClearBackground(WHITE);
            DrawTextEx(font, text, (Vector2){50,50}, 32, 5, RED);
        EndDrawing();

        //free
        UnloadFont(font);
    }

    //free
    UnloadFileData(fileData);
    CloseWindow();
    return 0;
}

[raysan5]

Thanks for sharing! I will add this example to raylib for future developers! 👍🙂

[raysan5]

Here a more complete version. Not tested but it should work:

#include "raylib.h"

#include <stdlib.h>         // Required for: calloc(), realloc(), free()
#include <string.h>         // Required for: memcpy()

// Text to be displayed, must be UTF-8 (save this code file as UTF-8)
// NOTE: It can contain all the text to be rendered in the game to be scanned to
// get all the required codepoints
static char *text = "世界，你好！";

// Remove codepoint duplicates if requested
static int *CodepointRemoveDuplicates(int *codepoints, int codepointCount, int *codepointResultCount);


//------------------------------------------------------------------------------------
// Program main entry point
//------------------------------------------------------------------------------------
int main(void)
{
    // Initialization
    //--------------------------------------------------------------------------------------
    const int screenWidth = 800;
    const int screenHeight = 450;

    InitWindow(screenWidth, screenHeight, "raylib [text] example - codepoints loading");
    
    // Get codepoints from text
    int codepointCount = 0;
    int *codepoints = LoadCodepoints(text, &codepointCount);
    
    // Removed duplicate codepoints to generate smaller font atlas
    int codepointsNoDuplicatesCount = 0;
    int *codepointsNoDuplicates = CodepointRemoveDuplicates(codepoints, codepointCount, &codepointsNoDuplicatesCount);
    UnloadCodepoints(codepoints);
    
    // Load font containing all the provided codepoints 
    Font font = LoadFontEx("./SimHei.ttf", 36, codepointsNoDuplicates, codepointsNoDuplicatesCount);
    
    // Unload codepoints, atlas has already been generated
    UnloadCodepoints(codepointsNoDuplicates);

    SetTargetFPS(60);               // Set our game to run at 60 frames-per-second
    //--------------------------------------------------------------------------------------

    // Main game loop
    while (!WindowShouldClose())    // Detect window close button or ESC key
    {
        // Update
        //----------------------------------------------------------------------------------
        // TODO: Update your variables here
        //----------------------------------------------------------------------------------

        // Draw
        //----------------------------------------------------------------------------------
        BeginDrawing();

            ClearBackground(RAYWHITE);

            DrawTextEx(font, text, (Vector2){ 50, 50 }, 32, 5, RED);

        EndDrawing();
        //----------------------------------------------------------------------------------
    }
    
    // De-Initialization
    //--------------------------------------------------------------------------------------
    UnloadFont(font);     // Unload font
    
    CloseWindow();        // Close window and OpenGL context
    //--------------------------------------------------------------------------------------
    
    return 0;
}

// Remove codepoint duplicates if requested
// WARNING: This process could be a bit slow if there text to process is very long
static int *CodepointRemoveDuplicates(int *codepoints, int codepointCount, int *codepointResultCount)
{
    int codepointsClearCount = codepointCount;
    int *codepointsClear = (int *)RL_CALLOC(codepointCount, sizeof(int));
    memcpy(codepointsClear, codepoints, codepointCount*sizeof(int));

    // Remove duplicates
    for (int i = 0; i < codepointsClearCount; i++)
    {
        for (int j = i + 1; j < codepointsClearCount; j++)
        {
            if (codepointsClear[i] == codepointsClear[j])
            {
                for (int k = j; k < codepointsClearCount; k++) codepointsClear[k] = codepointsClear[k + 1];

                codepointsClearCount--;
                j--;
            }
        }
    }
    
    // Resize array to number of resulting codepoints (lower or equal to input)
    RL_REALLOC(codepointsClear, codepointsClearCount*sizeof(int));
    
    *codepointResultCount = codepointsClearCount;
    return codepointsClear;
}

[wlxmhls]

Works fine! +1

[enjoecn]

not works for me.

macos 13.5.1
raylib 5.0.

[enjoecn]

got it. i use .ttc font file, not .tff file.