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raylib-src
mirror of https://github.com/raysan5/raylib


								/*******************************************************************************************

								*

								*   raylib [text] example - Codepoints loading

								*

								*   Example originally created with raylib 4.2, last time updated with raylib 2.5

								*

								*   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) 2022-2024 Ramon Santamaria (@raysan5)

								*

								********************************************************************************************/


								#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 required text for the game,

								// this text will be scanned to get all the required codepoints

								static char *text = "いろはにほへと　ちりぬるを\nわかよたれそ　つねならむ\nうゐのおくやま　けふこえて\nあさきゆめみし　ゑひもせす";


								// 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 codepointsNoDupsCount = 0;

								    int *codepointsNoDups = CodepointRemoveDuplicates(codepoints, codepointCount, &codepointsNoDupsCount);

								    UnloadCodepoints(codepoints);


								    // Load font containing all the provided codepoint glyphs

								    // A texture font atlas is automatically generated

								    Font font = LoadFontEx("resources/DotGothic16-Regular.ttf", 36, codepointsNoDups, codepointsNoDupsCount);


								    // Set bilinear scale filter for better font scaling

								    SetTextureFilter(font.texture, TEXTURE_FILTER_BILINEAR);


								    SetTextLineSpacing(20);         // Set line spacing for multiline text (when line breaks are included '\n')


								    // Free codepoints, atlas has already been generated

								    free(codepointsNoDups);


								    bool showFontAtlas = false;


								    int codepointSize = 0;

								    char *ptr = text;


								    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

								        //----------------------------------------------------------------------------------

								        if (IsKeyPressed(KEY_SPACE)) showFontAtlas = !showFontAtlas;


								        // Testing code: getting next and previous codepoints on provided text

								        if (IsKeyPressed(KEY_RIGHT))

								        {

								            // Get next codepoint in string and move pointer

								            GetCodepointNext(ptr, &codepointSize);

								            ptr += codepointSize;

								        }

								        else if (IsKeyPressed(KEY_LEFT))

								        {

								            // Get previous codepoint in string and move pointer

								            GetCodepointPrevious(ptr, &codepointSize);

								            ptr -= codepointSize;

								        }

								        //----------------------------------------------------------------------------------


								        // Draw

								        //----------------------------------------------------------------------------------

								        BeginDrawing();


								            ClearBackground(RAYWHITE);


								            DrawRectangle(0, 0, GetScreenWidth(), 70, BLACK);

								            DrawText(TextFormat("Total codepoints contained in provided text: %i", codepointCount), 10, 10, 20, GREEN);

								            DrawText(TextFormat("Total codepoints required for font atlas (duplicates excluded): %i", codepointsNoDupsCount), 10, 40, 20, GREEN);


								            if (showFontAtlas)

								            {

								                // Draw generated font texture atlas containing provided codepoints

								                DrawTexture(font.texture, 150, 100, BLACK);

								                DrawRectangleLines(150, 100, font.texture.width, font.texture.height, BLACK);

								            }

								            else

								            {

								                // Draw provided text with laoded font, containing all required codepoint glyphs

								                DrawTextEx(font, text, (Vector2) { 160, 110 }, 48, 5, BLACK);

								            }


								            DrawText("Press SPACE to toggle font atlas view!", 10, GetScreenHeight() - 30, 20, GRAY);


								        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 *codepointsResultCount)

								{

								    int codepointsNoDupsCount = codepointCount;

								    int *codepointsNoDups = (int *)calloc(codepointCount, sizeof(int));

								    memcpy(codepointsNoDups, codepoints, codepointCount*sizeof(int));


								    // Remove duplicates

								    for (int i = 0; i < codepointsNoDupsCount; i++)

								    {

								        for (int j = i + 1; j < codepointsNoDupsCount; j++)

								        {

								            if (codepointsNoDups[i] == codepointsNoDups[j])

								            {

								                for (int k = j; k < codepointsNoDupsCount; k++) codepointsNoDups[k] = codepointsNoDups[k + 1];


								                codepointsNoDupsCount--;

								                j--;

								            }

								        }

								    }


								    // NOTE: The size of codepointsNoDups is the same as original array but

								    // only required positions are filled (codepointsNoDupsCount)


								    *codepointsResultCount = codepointsNoDupsCount;

								    return codepointsNoDups;

								}