raylib-cs/Examples/textures/textures_image_text.cs

using Raylib;
using static Raylib.Raylib;

public partial class textures_image_text
{
    /*******************************************************************************************
    *
    *   raylib [texture] example - Image text drawing using TTF generated spritefont
    *
    *   This example has been created using raylib 1.8 (www.raylib.com)
    *   raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
    *
    *   Copyright (c) 2017 Ramon Santamaria (@raysan5)
    *
    ********************************************************************************************/


    public static int Main()
    {
        // Initialization
        //--------------------------------------------------------------------------------------
        int screenWidth = 800;
        int screenHeight = 450;

        InitWindow(screenWidth, screenHeight, "raylib [texture] example - image text drawing");

        // TTF Font loading with custom generation parameters
        Font font = LoadFontEx("resources/KAISG.ttf", 64, 95, null);

        Image parrots = LoadImage("resources/parrots.png"); // Load image in CPU memory (RAM)

        // Draw over image using custom font
        ImageDrawTextEx(ref parrots, new Vector2( 20, 20 ), font, "[Parrots font drawing]", font.baseSize, 0, WHITE);

        Texture2D texture = LoadTextureFromImage(parrots);  // Image converted to texture, uploaded to GPU memory (VRAM)
        UnloadImage(parrots);   // Once image has been converted to texture and uploaded to VRAM, it can be unloaded from RAM

        Vector2 position = new Vector2( screenWidth/2 - texture.width/2, screenHeight/2 - texture.height/2 - 20 );

        bool showFont = false;

        SetTargetFPS(60);
        //--------------------------------------------------------------------------------------

        // Main game loop
        while (!WindowShouldClose())    // Detect window close button or ESC key
        {
            // Update
            //----------------------------------------------------------------------------------
            if (IsKeyDown(KeyboardKey.KEY_SPACE)) showFont = true;
            else showFont = false;
            //----------------------------------------------------------------------------------

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

                ClearBackground(RAYWHITE);

                if (!showFont)
                {
                    // Draw texture with text already drawn inside
                    DrawTextureV(texture, position, WHITE);

                    // Draw text directly using sprite font
                    DrawTextEx(font, "[Parrots font drawing]", new Vector2( position.x + 20,
                               position.y + 20 + 280 ), font.baseSize, 0, WHITE);
                }
                else DrawTexture(font.texture, screenWidth/2 - font.texture.width/2, 50, BLACK);

                DrawText("PRESS SPACE to SEE USED SPRITEFONT ", 290, 420, 10, DARKGRAY);

            EndDrawing();
            //----------------------------------------------------------------------------------
        }

        // De-Initialization
        //--------------------------------------------------------------------------------------
        UnloadTexture(texture);     // Texture unloading

        UnloadFont(font);     // Unload custom spritefont

        CloseWindow();              // Close window and OpenGL context
        //--------------------------------------------------------------------------------------

        return 0;
    }
}