mfkiwl / raylib-nuklear

Nuklear immediate mode GUI for raylib

raylib-nuklear

Use the Nuklear immediate mode cross-platform GUI library in raylib.

Usage

1. Since this is a header-only library, you must first define RAYLIB_NUKLEAR_IMPLEMENTATION in one of your .c files...

   #define RAYLIB_NUKLEAR_IMPLEMENTATION

2. Include the raylib-nuklear.h file...

   #include "path/to/raylib-nuklear.h"

3. Use InitNuklear(fontSize) or InitNuklearEx(font, fontSize) to create the nuklear context...

   struct nk_context *ctx = InitNuklear(10);

4. Build your Nuklear GUI through the standard Nuklear API
5. Update the input for the GUI using UpdateNuklear(ctx)
6. Render the context using DrawNuklear(ctx)
7. Destroy the nuklear context with UnloadNuklear(ctx)

Example

#define RAYLIB_NUKLEAR_IMPLEMENTATION
#include "raylib-nuklear.h"

int main() {
    InitWindow(640, 480, "raylib-nuklear example");

    // Create the Nuklear Context
    int fontSize = 10;
    struct nk_context *ctx = InitNuklear(fontSize);

    while (!WindowShouldClose()) {
        // Update the Nuklear context, along with input
        UpdateNuklear(ctx);

        // Nuklear GUI Code
        // https://github.com/Immediate-Mode-UI/Nuklear/wiki/Window
        if (nk_begin(ctx, "Nuklear", nk_rect(100, 100, 220, 220),
                NK_WINDOW_BORDER|NK_WINDOW_MOVABLE|NK_WINDOW_CLOSABLE)) {
            if (nk_button_label(ctx, "Button")) {
                // Button was clicked!
            }
        }
        nk_end(ctx);

        // Render
        BeginDrawing();
            ClearBackground(RAYWHITE);

            // Render the Nuklear GUI
            DrawNuklear(ctx);

        EndDrawing();
    }

    // De-initialize the Nuklear GUI
    UnloadNuklear(ctx);

    CloseWindow();
    return 0;
}

API

struct nk_context* InitNuklear(int fontSize);                // Initialize the Nuklear GUI context
struct nk_context* InitNuklearEx(Font font, float fontSize); // Initialize the Nuklear GUI context, with a custom font
void UpdateNuklear(struct nk_context * ctx);                 // Update the input state and internal components for Nuklear
void DrawNuklear(struct nk_context * ctx);                   // Render the Nuklear GUI on the screen
void UnloadNuklear(struct nk_context * ctx);                 // Deinitialize the Nuklear context
struct nk_color ColorToNuklear(Color color);                 // Convert a raylib Color to a Nuklear color object
struct nk_colorf ColorToNuklearF(Color color);               // Convert a raylib Color to a Nuklear floating color
struct Color ColorFromNuklear(struct nk_color color);        // Convert a Nuklear color to a raylib Color
struct Color ColorFromNuklearF(struct nk_colorf color);      // Convert a Nuklear floating color to a raylib Color
struct Rectangle RectangleFromNuklear(struct nk_rect rect);  // Convert a Nuklear rectangle to a raylib Rectangle
struct nk_rect RectangleToNuklear(Rectangle rect);           // Convert a raylib Rectangle to a Nuklear Rectangle
struct nk_image TextureToNuklear(Texture tex);               // Convert a raylib Texture to A Nuklear image
struct Texture TextureFromNuklear(struct nk_image img);      // Convert a Nuklear image to a raylib Texture
struct nk_image LoadNuklearImage(const char* path);          // Load a Nuklear image
void UnloadNuklearImage(struct nk_image img);                // Unload a Nuklear image. And free its data
void CleanupNuklearImage(struct nk_image img);               // Frees the data stored by the Nuklear image

See the Nuklear API documenation for more how to use Nuklear.

Development

While this project uses CMake, CMake is not required in order to use raylib-nuklear.

git submodule update --init
mkdir build
cd build
cmake ..
make
./example/raylib-nuklear-example
make test

License

raylib-nuklear is licensed under an unmodified zlib/libpng license, which is an OSI-certified, BSD-like license that allows static linking with closed source software. Check LICENSE for further details.