Merge branch 'master' of https://github.com/ricanteja/nuklear into ricanteja-master

demo/sfml_opengl2/Makefile

@@ -0,0 +1,29 @@
+# Install
+CC = g++
+BIN = demo
+
+# Flags
+CFLAGS = -s -O2
+
+SRC = main.cpp
+OBJ = $(SRC:.cpp=.o)
+
+# TODO: Mac Build
+ifeq ($(OS),Windows_NT)
+	# Edit the line below to point to your SFML folder on Windows
+	SFML_DIR = C:/Users/Ricky/MinGW-Libs/SFML
+
+	BIN := $(BIN).exe
+	LIBS = -lmingw32 -DSFML_STATIC -lsfml-window-s -lsfml-system-s -lopengl32 -lwinmm -lgdi32
+else
+	# Edit the line below to point to your SFML folder on Linux
+	SFML_DIR = /home/ricky/Libraries/SFML
+
+	LIBS = -DSFML_STATIC -lsfml-window-s -lsfml-system-s -pthread -ludev -lGL -lX11 -lXrandr
+endif
+
+SFML_INC = -I $(SFML_DIR)/include
+SFML_LIB = -L $(SFML_DIR)/lib
+
+$(BIN):
+	$(CC) $(SRC) $(CFLAGS) -o $(BIN) $(SFML_INC) $(SFML_LIB) $(LIBS)

demo/sfml_opengl2/Readme.md

@@ -0,0 +1,9 @@
+# SFML 2.4 nuklear backend
+
+This backend provides support for [SFML 2.4](http://www.sfml-dev.org). It will work on all platforms supported by SFML.
+
+## Compiling
+
+You have to edit the Makefile provided so that you can build the demo. Edit the SFML_DIR variable to point to your SFML root folder. This will be the folder to which SFML was installed and contains the lib and include folders.
+
+On Linux there is an extra step. You need to install the the udev development files.

demo/sfml_opengl2/main.cpp

@@ -0,0 +1,176 @@
+/* nuklear - v1.32.0 - public domain */
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <stdarg.h>
+#include <string.h>
+#include <math.h>
+#include <assert.h>
+#include <math.h>
+#include <limits.h>
+#include <time.h>
+
+#include <SFML/OpenGL.hpp>
+#include <SFML/Window.hpp>
+
+#define NK_INCLUDE_FIXED_TYPES
+#define NK_INCLUDE_STANDARD_IO
+#define NK_INCLUDE_STANDARD_VARARGS
+#define NK_INCLUDE_DEFAULT_ALLOCATOR
+#define NK_INCLUDE_VERTEX_BUFFER_OUTPUT
+#define NK_INCLUDE_FONT_BAKING
+#define NK_INCLUDE_DEFAULT_FONT
+#define NK_IMPLEMENTATION
+#define NK_SFML_GL2_IMPLEMENTATION
+#include "../../nuklear.h"
+#include "nuklear_sfml_gl2.h"
+
+#define WINDOW_WIDTH 1200
+#define WINDOW_HEIGHT 800
+
+#define MAX_VERTEX_BUFFER 512 * 1024
+#define MAX_ELEMENT_BUFFER 128 * 1024
+
+#define UNUSED(a) (void)a
+#define MIN(a,b) ((a) < (b) ? (a) : (b))
+#define MAX(a,b) ((a) < (b) ? (b) : (a))
+#define LEN(a) (sizeof(a)/sizeof(a)[0])
+
+/* ===============================================================
+ *
+ *                          EXAMPLE
+ *
+ * ===============================================================*/
+/* This are some code examples to provide a small overview of what can be
+ * done with this library. To try out an example uncomment the include
+ * and the corresponding function. */
+/*#include "../style.c"*/
+/*#include "../calculator.c"*/
+/*#include "../overview.c"*/
+/*#include "../node_editor.c"*/
+
+/* ===============================================================
+ *
+ *                          DEMO
+ *
+ * ===============================================================*/
+int main(void)
+{
+    /* Platform */
+    sf::ContextSettings settings(24, 8, 4, 2, 2);
+    sf::Window window(sf::VideoMode(WINDOW_WIDTH, WINDOW_HEIGHT), "Demo", sf::Style::Default, settings);
+
+    window.setVerticalSyncEnabled(true);
+    window.setActive(true);
+
+    glViewport(0, 0, window.getSize().x, window.getSize().y);
+    struct nk_context *ctx;
+    struct nk_color background;
+
+    /* GUI */
+    ctx = nk_sfml_init(&window);
+    /* Load Fonts: if none of these are loaded a default font will be used  */
+    /* Load Cursor: if you uncomment cursor loading please hide the cursor */
+    {
+        struct nk_font_atlas *atlas;
+        nk_sfml_font_stash_begin(&atlas);
+        /*struct nk_font *droid = nk_font_atlas_add_from_file(atlas, "../../../extra_font/DroidSans.ttf", 14, 0);*/
+        /*struct nk_font *roboto = nk_font_atlas_add_from_file(atlas, "../../../extra_font/Roboto-Regular.ttf", 14, 0);*/
+        /*struct nk_font *future = nk_font_atlas_add_from_file(atlas, "../../../extra_font/kenvector_future_thin.ttf", 13, 0);*/
+        /*struct nk_font *clean = nk_font_atlas_add_from_file(atlas, "../../../extra_font/ProggyClean.ttf", 12, 0);*/
+        /*struct nk_font *tiny = nk_font_atlas_add_from_file(atlas, "../../../extra_font/ProggyTiny.ttf", 10, 0);*/
+        /*struct nk_font *cousine = nk_font_atlas_add_from_file(atlas, "../../../extra_font/Cousine-Regular.ttf", 13, 0);*/
+        nk_sfml_font_stash_end();
+        /*nk_style_load_all_cursors(ctx, atlas->cursors);*/
+        /*nk_style_set_font(ctx, &droid->handle);*/
+    }
+
+    /* style.c */
+    /*set_style(ctx, THEME_WHITE);*/
+    /*set_style(ctx, THEME_RED);*/
+    /*set_style(ctx, THEME_BLUE);*/
+    /*set_style(ctx, THEME_DARK);*/
+
+    background = nk_rgb(28,48,62);
+
+    while (window.isOpen())
+    {
+        /* Input */
+        sf::Event event;
+
+        nk_input_begin(ctx);
+        while(window.pollEvent(event))
+        {
+            if(event.type == sf::Event::Closed)
+                window.close();
+            else if(event.type == sf::Event::Resized)
+                glViewport(0, 0, event.size.width, event.size.height);
+
+            nk_sfml_handle_event(&event);
+        }
+        nk_input_end(ctx);
+
+        /* GUI */
+        if (nk_begin(ctx, "Demo", nk_rect(50, 50, 230, 250),
+            NK_WINDOW_BORDER|NK_WINDOW_MOVABLE|NK_WINDOW_SCALABLE|
+            NK_WINDOW_MINIMIZABLE|NK_WINDOW_TITLE))
+        {
+            enum {EASY, HARD};
+            static int op = EASY;
+            static int property = 20;
+            nk_layout_row_static(ctx, 30, 80, 1);
+            if (nk_button_label(ctx, "button"))
+                fprintf(stdout, "button pressed\n");
+
+            nk_layout_row_dynamic(ctx, 30, 2);
+            if (nk_option_label(ctx, "easy", op == EASY)) op = EASY;
+            if (nk_option_label(ctx, "hard", op == HARD)) op = HARD;
+
+            nk_layout_row_dynamic(ctx, 25, 1);
+            nk_property_int(ctx, "Compression:", 0, &property, 100, 10, 1);
+
+            nk_layout_row_dynamic(ctx, 20, 1);
+            nk_label(ctx, "background:", NK_TEXT_LEFT);
+            nk_layout_row_dynamic(ctx, 25, 1);
+            if (nk_combo_begin_color(ctx, background, nk_vec2(nk_widget_width(ctx),400))) {
+                nk_layout_row_dynamic(ctx, 120, 1);
+                background = nk_color_picker(ctx, background, NK_RGBA);
+                nk_layout_row_dynamic(ctx, 25, 1);
+                background.r = (nk_byte)nk_propertyi(ctx, "#R:", 0, background.r, 255, 1,1);
+                background.g = (nk_byte)nk_propertyi(ctx, "#G:", 0, background.g, 255, 1,1);
+                background.b = (nk_byte)nk_propertyi(ctx, "#B:", 0, background.b, 255, 1,1);
+                background.a = (nk_byte)nk_propertyi(ctx, "#A:", 0, background.a, 255, 1,1);
+                nk_combo_end(ctx);
+            }
+        }
+        nk_end(ctx);
+
+        /* -------------- EXAMPLES ---------------- */
+        /*calculator(ctx);*/
+        /*overview(ctx);*/
+        /*node_editor(ctx);*/
+        /* ----------------------------------------- */
+
+        /* Draw */
+        {
+            window.setActive(true);
+
+            float bg[4];
+            nk_color_fv(bg, background);
+            glClear(GL_COLOR_BUFFER_BIT);
+            glClearColor(bg[0], bg[1], bg[2], bg[3]);
+
+            /* IMPORTANT: `nk_sfml_render` modifies some global OpenGL state
+            * with blending, scissor, face culling and depth test and defaults everything
+            * back into a default state. Make sure to either save and restore or
+            * reset your own state after drawing rendering the UI. */
+            nk_sfml_render(NK_ANTI_ALIASING_ON, MAX_VERTEX_BUFFER, MAX_ELEMENT_BUFFER);
+            
+            window.display();
+        }
+    }
+
+    nk_sfml_shutdown();
+    return 0;
+}
+

demo/sfml_opengl2/nuklear_sfml_gl2.h

@@ -0,0 +1,406 @@
+/*
+ * Nuklear - 1.32.0 - public domain
+ * no warrenty implied; use at your own risk.
+ * authored from 2015-2016 by Micha Mettke
+ */
+/*
+ * ==============================================================
+ *
+ *                              API
+ *
+ * ===============================================================
+ */
+#ifndef NK_SFML_GL2_H_
+#define NK_SFML_GL2_H_
+
+#include <SFML/Window.hpp>
+
+NK_API struct nk_context*   nk_sfml_init(sf::Window* window);
+NK_API void                 nk_sfml_font_stash_begin(struct nk_font_atlas** atlas);
+NK_API void                 nk_sfml_font_stash_end(void);
+NK_API int                  nk_sfml_handle_event(sf::Event* event);
+NK_API void                 nk_sfml_render(enum nk_anti_aliasing, int max_vertex_buffer, int max_element_buffer);
+NK_API void                 nk_sfml_shutdown(void);
+
+#endif
+/*
+ * ==============================================================
+ *
+ *                          IMPLEMENTATION
+ *
+ * ===============================================================
+ */
+ #ifdef NK_SFML_GL2_IMPLEMENTATION
+
+struct nk_sfml_device
+{
+    struct nk_buffer cmds;
+    struct nk_draw_null_texture null;
+    GLuint font_tex;
+};
+
+struct nk_sfml_vertex
+{
+    float position[2];
+    float uv[2];
+    nk_byte col[4];
+};
+
+static struct nk_sfml
+{
+    sf::Window* window;
+    struct nk_sfml_device ogl;
+    struct nk_context ctx;
+    struct nk_font_atlas atlas;
+} sfml;
+
+NK_INTERN void
+nk_sfml_device_upload_atlas(const void* image, int width, int height)
+{
+    struct nk_sfml_device* dev = &sfml.ogl;
+    glGenTextures(1, &dev->font_tex);
+    glBindTexture(GL_TEXTURE_2D, dev->font_tex);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, (GLsizei)width, (GLsizei)height, 0, 
+                GL_RGBA, GL_UNSIGNED_BYTE, image);
+}
+
+NK_API void
+nk_sfml_render(enum nk_anti_aliasing AA, int max_vertex_buffer, int max_element_buffer)
+{
+    /* setup global state */
+    struct nk_sfml_device* dev = &sfml.ogl;
+
+    int window_width = sfml.window->getSize().x;
+    int window_height = sfml.window->getSize().y;
+
+    glPushAttrib(GL_ENABLE_BIT | GL_COLOR_BUFFER_BIT | GL_TRANSFORM_BIT);
+    glDisable(GL_CULL_FACE);
+    glDisable(GL_DEPTH_TEST);
+    glEnable(GL_SCISSOR_TEST);
+    glEnable(GL_BLEND);
+    glEnable(GL_TEXTURE_2D);
+    glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+
+    glViewport(0, 0, (GLsizei)window_width, (GLsizei)window_height);
+    glMatrixMode(GL_PROJECTION);
+    glPushMatrix();
+    glLoadIdentity();
+    glOrtho(0.0f, window_width, window_height, 0.0f, -1.0f, 1.0f);
+    glMatrixMode(GL_MODELVIEW);
+    glPushMatrix();
+    glLoadIdentity();
+
+    glEnableClientState(GL_VERTEX_ARRAY);
+    glEnableClientState(GL_TEXTURE_COORD_ARRAY);
+    glEnableClientState(GL_COLOR_ARRAY);
+    {
+        GLsizei vs = sizeof(struct nk_sfml_vertex);
+        size_t vp = offsetof(struct nk_sfml_vertex, position);
+        size_t vt = offsetof(struct nk_sfml_vertex, uv);
+        size_t vc = offsetof(struct nk_sfml_vertex, col);
+
+        /* convert from command queue into draw  list and draw to screen */
+        const struct nk_draw_command* cmd;
+        const nk_draw_index* offset = NULL;
+        struct nk_buffer vbuf, ebuf;
+
+        /* fill converting configuration */
+        struct nk_convert_config config;
+        static const struct nk_draw_vertex_layout_element vertex_layout[] = 
+        {
+            {NK_VERTEX_POSITION, NK_FORMAT_FLOAT, NK_OFFSETOF(struct nk_sfml_vertex, position)},
+            {NK_VERTEX_TEXCOORD, NK_FORMAT_FLOAT, NK_OFFSETOF(struct nk_sfml_vertex, uv)},
+            {NK_VERTEX_COLOR, NK_FORMAT_R8G8B8A8, NK_OFFSETOF(struct nk_sfml_vertex, col)},
+            {NK_VERTEX_LAYOUT_END}
+        };
+        NK_MEMSET(&config, 0, sizeof(config));
+        config.vertex_layout = vertex_layout;
+        config.vertex_size = sizeof(struct nk_sfml_vertex);
+        config.vertex_alignment = NK_ALIGNOF(struct nk_sfml_vertex);
+        config.null = dev->null;
+        config.circle_segment_count = 22;
+        config.curve_segment_count = 22;
+        config.arc_segment_count = 22;
+        config.global_alpha = 1.0f;
+        config.shape_AA = AA;
+        config.line_AA = AA;
+
+        /* convert shapes into vertices */
+        nk_buffer_init_default(&vbuf);
+        nk_buffer_init_default(&ebuf);
+        nk_convert(&sfml.ctx, &dev->cmds, &vbuf, &ebuf, &config);
+
+        /* setup vertex buffer pointer */
+        {
+            const void* vertices = nk_buffer_memory_const(&vbuf);
+            glVertexPointer(2, GL_FLOAT, vs, (const void*)((const nk_byte*)vertices + vp));
+            glTexCoordPointer(2, GL_FLOAT, vs, (const void*)((const nk_byte*)vertices + vt));
+            glColorPointer(4, GL_UNSIGNED_BYTE, vs, (const void*)((const nk_byte*)vertices + vc));
+        }
+
+        /* iterate over and execute each draw command */
+        offset = (const nk_draw_index*)nk_buffer_memory_const(&ebuf);
+        nk_draw_foreach(cmd, &sfml.ctx, &dev->cmds)
+        {
+            if(!cmd->elem_count) continue;
+
+            glBindTexture(GL_TEXTURE_2D, (GLuint)cmd->texture.id);
+            glScissor(
+                (GLint)(cmd->clip_rect.x),
+                (GLint)((window_height - (GLint)(cmd->clip_rect.y + cmd->clip_rect.h))),
+                (GLint)(cmd->clip_rect.w),
+                (GLint)(cmd->clip_rect.h));
+            glDrawElements(GL_TRIANGLES, (GLsizei)cmd->elem_count, GL_UNSIGNED_SHORT, offset);
+            offset += cmd->elem_count;
+        }
+        nk_clear(&sfml.ctx);
+        nk_buffer_free(&vbuf);
+        nk_buffer_free(&ebuf);
+    }
+
+    /* default OpenGL state */
+    glDisableClientState(GL_VERTEX_ARRAY);
+    glDisableClientState(GL_TEXTURE_COORD_ARRAY);
+    glDisableClientState(GL_COLOR_ARRAY);
+
+    glDisable(GL_CULL_FACE);
+    glDisable(GL_DEPTH_TEST);
+    glDisable(GL_SCISSOR_TEST);
+    glDisable(GL_BLEND);
+    glDisable(GL_TEXTURE_2D);
+
+    glBindTexture(GL_TEXTURE_2D, 0);
+    glMatrixMode(GL_MODELVIEW);
+    glPopMatrix();
+    glMatrixMode(GL_PROJECTION);
+    glPopMatrix();
+    glPopAttrib();
+}
+
+static void
+nk_sfml_clipboard_paste(nk_handle usr, struct nk_text_edit* edit)
+{
+    /* Not Implemented in SFML 
+    sf::Clipboard clipboard(sfml.window);
+    const char* text = clipboard.getText();
+
+    if(text)
+        nk_textedit_paste(edit, text, nk_strlen(text));
+        (void)usr;
+    */
+}
+
+static void
+nk_sfml_clipboard_copy(nk_handle usr, const char* text, int len)
+{
+    /*
+    char* str = 0;
+    (void)usr;
+    if(!len)
+        return;
+    str = (char*)malloc((size_t)len+1);
+    if(!str)
+        return;
+    memcpy(str, text, (size_t)len);
+    str[len] = '\0';
+
+     Not Implemented in SFML
+    sf::Clipboard clipboard(sfml.window);
+    clipboard.setText(str);
+    
+    free(str);
+    */
+}
+
+NK_API struct nk_context*
+nk_sfml_init(sf::Window* window)
+{
+    sfml.window = window;
+    nk_init_default(&sfml.ctx, 0);
+    sfml.ctx.clip.copy = nk_sfml_clipboard_copy;
+    sfml.ctx.clip.paste = nk_sfml_clipboard_paste;
+    sfml.ctx.clip.userdata = nk_handle_ptr(0);
+    nk_buffer_init_default(&sfml.ogl.cmds);
+    return &sfml.ctx;
+}
+
+NK_API void
+nk_sfml_font_stash_begin(struct nk_font_atlas** atlas)
+{
+    nk_font_atlas_init_default(&sfml.atlas);
+    nk_font_atlas_begin(&sfml.atlas);
+    *atlas = &sfml.atlas;
+}
+
+NK_API void
+nk_sfml_font_stash_end(void)
+{
+    const void* image;
+    int w, h;
+    image = nk_font_atlas_bake(&sfml.atlas, &w, &h, NK_FONT_ATLAS_RGBA32);
+    nk_sfml_device_upload_atlas(image, w, h);
+    nk_font_atlas_end(&sfml.atlas, nk_handle_id((int)sfml.ogl.font_tex), &sfml.ogl.null);
+    if(sfml.atlas.default_font)
+        nk_style_set_font(&sfml.ctx, &sfml.atlas.default_font->handle);
+}
+
+NK_API int
+nk_sfml_handle_event(sf::Event* event)
+{
+    struct nk_context* ctx = &sfml.ctx;
+
+    /* optional grabbing behavior */
+    if(ctx->input.mouse.grab)
+        ctx->input.mouse.grab = 0;
+    else if(ctx->input.mouse.ungrab)
+    {
+        int x = (int)ctx->input.mouse.prev.x;
+        int y = (int)ctx->input.mouse.prev.y;
+
+        sf::Mouse::setPosition(sf::Vector2i(x, y), *sfml.window);
+        ctx->input.mouse.ungrab = 0;
+    }
+
+
+    if(event->type == sf::Event::KeyReleased || event->type == sf::Event::KeyPressed)
+    {
+        int down = event->type == sf::Event::KeyPressed;
+        sf::Keyboard::Key key = event->key.code;
+
+        if(key == sf::Keyboard::RShift || key == sf::Keyboard::LShift)
+            nk_input_key(ctx, NK_KEY_SHIFT, down);
+        else if(key == sf::Keyboard::Delete)
+            nk_input_key(ctx, NK_KEY_DEL, down);
+        else if(key == sf::Keyboard::Return)
+            nk_input_key(ctx, NK_KEY_ENTER, down);
+        else if(key == sf::Keyboard::Tab)
+            nk_input_key(ctx, NK_KEY_TAB, down);
+        else if(key == sf::Keyboard::BackSpace)
+            nk_input_key(ctx, NK_KEY_BACKSPACE, down);
+        else if(key == sf::Keyboard::Home)
+        {
+            nk_input_key(ctx, NK_KEY_TEXT_START, down);
+            nk_input_key(ctx, NK_KEY_SCROLL_START, down);
+        }
+        else if(key == sf::Keyboard::End)
+        {
+            nk_input_key(ctx, NK_KEY_TEXT_END, down);
+            nk_input_key(ctx, NK_KEY_SCROLL_END, down);
+        }
+        else if(key == sf::Keyboard::PageDown)
+            nk_input_key(ctx, NK_KEY_SCROLL_DOWN, down);
+        else if(key == sf::Keyboard::PageUp)
+            nk_input_key(ctx, NK_KEY_SCROLL_DOWN, down);
+        else if(key == sf::Keyboard::Z)
+            nk_input_key(ctx, NK_KEY_TEXT_UNDO, down && sf::Keyboard::isKeyPressed(sf::Keyboard::LControl));
+        else if(key == sf::Keyboard::R)
+            nk_input_key(ctx, NK_KEY_TEXT_REDO, down && sf::Keyboard::isKeyPressed(sf::Keyboard::LControl));
+        else if(key == sf::Keyboard::C)
+            nk_input_key(ctx, NK_KEY_COPY, down && sf::Keyboard::isKeyPressed(sf::Keyboard::LControl));
+        else if(key == sf::Keyboard::V)
+            nk_input_key(ctx, NK_KEY_PASTE, down && sf::Keyboard::isKeyPressed(sf::Keyboard::LControl));
+        else if(key == sf::Keyboard::X)
+            nk_input_key(ctx, NK_KEY_CUT, down && sf::Keyboard::isKeyPressed(sf::Keyboard::LControl));
+        else if(key == sf::Keyboard::B)
+            nk_input_key(ctx, NK_KEY_TEXT_LINE_START, down && sf::Keyboard::isKeyPressed(sf::Keyboard::LControl));
+        else if(key == sf::Keyboard::E)
+            nk_input_key(ctx, NK_KEY_TEXT_LINE_END, down && sf::Keyboard::isKeyPressed(sf::Keyboard::LControl));
+        else if(key == sf::Keyboard::Up)
+            nk_input_key(ctx, NK_KEY_UP, down);
+        else if(key == sf::Keyboard::Down)
+            nk_input_key(ctx, NK_KEY_DOWN, down);
+        else if(key == sf::Keyboard::Left)
+        {
+            if(sf::Keyboard::isKeyPressed(sf::Keyboard::LControl))
+                nk_input_key(ctx, NK_KEY_TEXT_WORD_LEFT, down);
+            else
+                nk_input_key(ctx, NK_KEY_LEFT, down);
+        }
+        else if(key == sf::Keyboard::Right)
+        {
+            if(sf::Keyboard::isKeyPressed(sf::Keyboard::LControl))
+                nk_input_key(ctx, NK_KEY_TEXT_WORD_RIGHT, down);
+            else
+                nk_input_key(ctx, NK_KEY_RIGHT, down);
+        }
+        else return 0;
+
+        return 1;
+    }
+    else if(event->type == sf::Event::MouseButtonPressed || event->type == sf::Event::MouseButtonReleased)
+    {
+        int down = event->type == sf::Event::MouseButtonPressed;
+        const int x = event->mouseButton.x;
+        const int y = event->mouseButton.y;
+
+        if(event->mouseButton.button == sf::Mouse::Left)
+            nk_input_button(ctx, NK_BUTTON_LEFT, x, y, down);
+        if(event->mouseButton.button == sf::Mouse::Middle)
+            nk_input_button(ctx, NK_BUTTON_MIDDLE, x, y, down);
+        if(event->mouseButton.button == sf::Mouse::Right)
+            nk_input_button(ctx, NK_BUTTON_RIGHT, x, y, down);
+        else
+            return 0;
+
+        return 1;
+    }
+    else if(event->type == sf::Event::MouseMoved)
+    {
+        nk_input_motion(ctx, event->mouseMove.x, event->mouseMove.y);
+
+        return 1;
+    }
+    else if(event->type == sf::Event::TouchBegan || event->type == sf::Event::TouchEnded)
+    {
+        int down = event->type == sf::Event::TouchBegan;
+        const int x = event->touch.x;
+        const int y = event->touch.y;
+
+        nk_input_button(ctx, NK_BUTTON_LEFT, x, y, down);
+
+        return 1;
+    }
+    else if(event->type == sf::Event::TouchMoved)
+    {
+        if(ctx->input.mouse.grabbed)
+        {
+            int x = (int)ctx->input.mouse.prev.x;
+            int y = (int)ctx->input.mouse.prev.y;
+
+            nk_input_motion(ctx, x + event->touch.x, y + event->touch.y);
+        }
+        else
+            nk_input_motion(ctx, event->touch.x, event->touch.y);
+
+        return 1;
+    }
+    else if(event->type == sf::Event::TextEntered)
+    {
+        nk_input_unicode(ctx, event->text.unicode);
+
+        return 1;
+    }
+    else if(event->type == sf::Event::MouseWheelScrolled)
+    {
+        nk_input_scroll(ctx, event->mouseWheelScroll.delta);
+
+        return 1;
+    }
+
+    return 0;
+}
+
+NK_API
+void nk_sfml_shutdown(void)
+{
+    struct nk_sfml_device* dev = &sfml.ogl;
+    nk_font_atlas_clear(&sfml.atlas);
+    nk_free(&sfml.ctx);
+    glDeleteTextures(1, &dev->font_tex);
+    nk_buffer_free(&dev->cmds);
+    memset(&sfml, 0, sizeof(sfml));
+}
+
+#endif

demo/sfml_opengl3/Makefile

@@ -0,0 +1,33 @@
+# Install
+CC = g++
+BIN = demo
+
+# Flags
+CFLAGS = -s -O2
+
+SRC = main.cpp
+OBJ = $(SRC:.cpp=.o)
+
+# TODO: Mac Build
+ifeq ($(OS),Windows_NT)
+	# Edit the line below to point to your SFML/GLAD folder on Windows
+	SFML_DIR = C:/Users/Ricky/MinGW-Libs/SFML
+	GLAD_DIR = C:/Users/Ricky/MinGW-Libs/GLAD
+
+	BIN := $(BIN).exe
+	LIBS = -lmingw32 -DSFML_STATIC -lsfml-window-s -lsfml-system-s -lopengl32 -lwinmm -lgdi32
+else
+	# Edit the line below to point to your SFML/GLAD folder on Linux
+	SFML_DIR = /home/ricky/Libraries/SFML
+	GLAD_DIR = /home/ricky/Libraries/GLAD
+
+	LIBS = -DSFML_STATIC -lsfml-window-s -lsfml-system-s -pthread -ludev -lGL -lX11 -lXrandr
+endif
+
+SFML_INC = -I $(SFML_DIR)/include
+SFML_LIB = -L $(SFML_DIR)/lib
+GLAD_INC = -I $(GLAD_DIR)/include
+GLAD_SRC = $(GLAD_DIR)/src/glad.c
+
+$(BIN):
+	$(CC) $(GLAD_SRC) $(SRC) $(CFLAGS) $(GLAD_INC) $(SFML_INC) $(SFML_LIB) $(SFML_EXT) -o $(BIN) $(LIBS)

demo/sfml_opengl3/main.cpp

@@ -0,0 +1,182 @@
+/* nuklear - v1.32.0 - public domain */
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <stdarg.h>
+#include <string.h>
+#include <math.h>
+#include <assert.h>
+#include <math.h>
+#include <limits.h>
+#include <time.h>
+
+#include <SFML/Window.hpp>
+
+#define NK_INCLUDE_FIXED_TYPES
+#define NK_INCLUDE_STANDARD_IO
+#define NK_INCLUDE_STANDARD_VARARGS
+#define NK_INCLUDE_DEFAULT_ALLOCATOR
+#define NK_INCLUDE_VERTEX_BUFFER_OUTPUT
+#define NK_INCLUDE_FONT_BAKING
+#define NK_INCLUDE_DEFAULT_FONT
+#define NK_IMPLEMENTATION
+#define NK_SFML_GL3_IMPLEMENTATION
+#include "../../nuklear.h"
+#include "nuklear_sfml_gl3.h"
+
+#define WINDOW_WIDTH 1200
+#define WINDOW_HEIGHT 800
+
+#define MAX_VERTEX_BUFFER 512 * 1024
+#define MAX_ELEMENT_BUFFER 128 * 1024
+
+#define UNUSED(a) (void)a
+#define MIN(a,b) ((a) < (b) ? (a) : (b))
+#define MAX(a,b) ((a) < (b) ? (b) : (a))
+#define LEN(a) (sizeof(a)/sizeof(a)[0])
+
+/* ===============================================================
+ *
+ *                          EXAMPLE
+ *
+ * ===============================================================*/
+/* This are some code examples to provide a small overview of what can be
+ * done with this library. To try out an example uncomment the include
+ * and the corresponding function. */
+/*#include "../style.c"*/
+/*#include "../calculator.c"*/
+/*#include "../overview.c"*/
+/*#include "../node_editor.c"*/
+
+/* ===============================================================
+ *
+ *                          DEMO
+ *
+ * ===============================================================*/
+int main(void)
+{
+    /* Platform */
+    sf::ContextSettings settings(24, 8, 4, 3, 3);
+    sf::Window window(sf::VideoMode(WINDOW_WIDTH, WINDOW_HEIGHT), "Demo", sf::Style::Default, settings);
+
+    window.setVerticalSyncEnabled(true);
+    window.setActive(true);
+
+    /* Load OpenGL extensions */
+    if(!gladLoadGL())
+    {
+        printf("Failed to load OpenGL extensions!\n");
+        return -1;
+    }
+
+    glViewport(0, 0, window.getSize().x, window.getSize().y);
+    struct nk_context *ctx;
+    struct nk_color background;
+
+    /* GUI */
+    ctx = nk_sfml_init(&window);
+    /* Load Fonts: if none of these are loaded a default font will be used  */
+    /* Load Cursor: if you uncomment cursor loading please hide the cursor */
+    {
+        struct nk_font_atlas *atlas;
+        nk_sfml_font_stash_begin(&atlas);
+        /*struct nk_font *droid = nk_font_atlas_add_from_file(atlas, "../../../extra_font/DroidSans.ttf", 14, 0);*/
+        /*struct nk_font *roboto = nk_font_atlas_add_from_file(atlas, "../../../extra_font/Roboto-Regular.ttf", 14, 0);*/
+        /*struct nk_font *future = nk_font_atlas_add_from_file(atlas, "../../../extra_font/kenvector_future_thin.ttf", 13, 0);*/
+        /*struct nk_font *clean = nk_font_atlas_add_from_file(atlas, "../../../extra_font/ProggyClean.ttf", 12, 0);*/
+        /*struct nk_font *tiny = nk_font_atlas_add_from_file(atlas, "../../../extra_font/ProggyTiny.ttf", 10, 0);*/
+        /*struct nk_font *cousine = nk_font_atlas_add_from_file(atlas, "../../../extra_font/Cousine-Regular.ttf", 13, 0);*/
+        nk_sfml_font_stash_end();
+        /*nk_style_load_all_cursors(ctx, atlas->cursors);*/
+        /*nk_style_set_font(ctx, &droid->handle);*/
+    }
+
+    /* style.c */
+    /*set_style(ctx, THEME_WHITE);*/
+    /*set_style(ctx, THEME_RED);*/
+    /*set_style(ctx, THEME_BLUE);*/
+    /*set_style(ctx, THEME_DARK);*/
+
+    background = nk_rgb(28,48,62);
+
+    while (window.isOpen())
+    {
+        /* Input */
+        sf::Event event;
+
+        nk_input_begin(ctx);
+        while(window.pollEvent(event))
+        {
+            if(event.type == sf::Event::Closed)
+                window.close();
+            else if(event.type == sf::Event::Resized)
+                glViewport(0, 0, event.size.width, event.size.height);
+
+            nk_sfml_handle_event(&event);
+        }
+        nk_input_end(ctx);
+
+        /* GUI */
+        if (nk_begin(ctx, "Demo", nk_rect(50, 50, 230, 250),
+            NK_WINDOW_BORDER|NK_WINDOW_MOVABLE|NK_WINDOW_SCALABLE|
+            NK_WINDOW_MINIMIZABLE|NK_WINDOW_TITLE))
+        {
+            enum {EASY, HARD};
+            static int op = EASY;
+            static int property = 20;
+            nk_layout_row_static(ctx, 30, 80, 1);
+            if (nk_button_label(ctx, "button"))
+                fprintf(stdout, "button pressed\n");
+
+            nk_layout_row_dynamic(ctx, 30, 2);
+            if (nk_option_label(ctx, "easy", op == EASY)) op = EASY;
+            if (nk_option_label(ctx, "hard", op == HARD)) op = HARD;
+
+            nk_layout_row_dynamic(ctx, 25, 1);
+            nk_property_int(ctx, "Compression:", 0, &property, 100, 10, 1);
+
+            nk_layout_row_dynamic(ctx, 20, 1);
+            nk_label(ctx, "background:", NK_TEXT_LEFT);
+            nk_layout_row_dynamic(ctx, 25, 1);
+            if (nk_combo_begin_color(ctx, background, nk_vec2(nk_widget_width(ctx),400))) {
+                nk_layout_row_dynamic(ctx, 120, 1);
+                background = nk_color_picker(ctx, background, NK_RGBA);
+                nk_layout_row_dynamic(ctx, 25, 1);
+                background.r = (nk_byte)nk_propertyi(ctx, "#R:", 0, background.r, 255, 1,1);
+                background.g = (nk_byte)nk_propertyi(ctx, "#G:", 0, background.g, 255, 1,1);
+                background.b = (nk_byte)nk_propertyi(ctx, "#B:", 0, background.b, 255, 1,1);
+                background.a = (nk_byte)nk_propertyi(ctx, "#A:", 0, background.a, 255, 1,1);
+                nk_combo_end(ctx);
+            }
+        }
+        nk_end(ctx);
+
+        /* -------------- EXAMPLES ---------------- */
+        /*calculator(ctx);*/
+        /*overview(ctx);*/
+        /*node_editor(ctx);*/
+        /* ----------------------------------------- */
+
+        /* Draw */
+        {
+            window.setActive(true);
+
+            float bg[4];
+            nk_color_fv(bg, background);
+            glClear(GL_COLOR_BUFFER_BIT);
+            glClearColor(bg[0], bg[1], bg[2], bg[3]);
+            
+            /* IMPORTANT: `nk_sfml_render` modifies some global OpenGL state
+            * with blending, scissor, face culling and depth test and defaults everything
+            * back into a default state. Make sure to either save and restore or
+            * reset your own state after drawing rendering the UI. */
+            nk_sfml_render(NK_ANTI_ALIASING_ON, MAX_VERTEX_BUFFER, MAX_ELEMENT_BUFFER);
+            
+            window.display();
+        }
+    }
+
+    nk_sfml_shutdown();
+    return 0;
+}
+

demo/sfml_opengl3/nuklear_sfml_gl3.h

@@ -0,0 +1,532 @@
+/*
+ * Nuklear - 1.32.0 - public domain
+ * no warrenty implied; use at your own risk.
+ * authored from 2015-2016 by Micha Mettke
+ */
+/*
+ * ==============================================================
+ *
+ *                              API
+ *
+ * ===============================================================
+ */
+#ifndef NK_SFML_GL3_H_
+#define NK_SFML_GL3_H_
+
+/* Feel free to edit here and include your own extension wrangler */
+#include <glad/glad.h>
+/* I use GLAD but you can use GLEW or what you like */
+
+#include <SFML/Window.hpp>
+
+NK_API struct nk_context*   nk_sfml_init(sf::Window* window);
+NK_API void                 nk_sfml_font_stash_begin(struct nk_font_atlas** atlas);
+NK_API void                 nk_sfml_font_stash_end(void);
+NK_API int                  nk_sfml_handle_event(sf::Event* event);
+NK_API void                 nk_sfml_render(enum nk_anti_aliasing, int max_vertex_buffer, int max_element_buffer);
+NK_API void                 nk_sfml_shutdown(void);
+
+NK_API void                 nk_sfml_device_create(void);
+NK_API void                 nk_sfml_device_destroy(void);
+
+#endif
+/*
+ * ==============================================================
+ *
+ *                          IMPLEMENTATION
+ *
+ * ===============================================================
+ */
+ #ifdef NK_SFML_GL3_IMPLEMENTATION
+
+#include <string>
+
+struct nk_sfml_device
+{
+    struct nk_buffer cmds;
+    struct nk_draw_null_texture null;
+    GLuint vbo, vao, ebo;
+    GLuint prog;
+    GLuint vert_shdr;
+    GLuint frag_shdr;
+    GLint attrib_pos;
+    GLint attrib_uv;
+    GLint attrib_col;
+    GLint uniform_tex;
+    GLint uniform_proj;
+    GLuint font_tex;
+};
+
+struct nk_sfml_vertex
+{
+    float position[2];
+    float uv[2];
+    nk_byte col[4];
+};
+
+static struct nk_sfml
+{
+    sf::Window* window;
+    struct nk_sfml_device ogl;
+    struct nk_context ctx;
+    struct nk_font_atlas atlas;
+} sfml;
+
+#ifdef __APPLE__
+  #define NK_SHADER_VERSION "#version 150\n"
+#else
+  #define NK_SHADER_VERSION "#version 300 es\n"
+#endif
+
+NK_API void
+nk_sfml_device_create(void)
+{
+    GLint status;
+    static const GLchar* vertex_shader =
+        NK_SHADER_VERSION
+        "uniform mat4 ProjMtx;\n"
+        "in vec2 Position;\n"
+        "in vec2 TexCoord;\n"
+        "in vec4 Color;\n"
+        "out vec2 Frag_UV;\n"
+        "out vec4 Frag_Color;\n"
+        "void main() {\n"
+        "   Frag_UV = TexCoord;\n"
+        "   Frag_Color = Color;\n"
+        "   gl_Position = ProjMtx * vec4(Position.xy, 0, 1);\n"
+        "}\n";
+    static const GLchar *fragment_shader =
+        NK_SHADER_VERSION
+        "precision mediump float;\n"
+        "uniform sampler2D Texture;\n"
+        "in vec2 Frag_UV;\n"
+        "in vec4 Frag_Color;\n"
+        "out vec4 Out_Color;\n"
+        "void main(){\n"
+        "   Out_Color = Frag_Color * texture(Texture, Frag_UV.st);\n"
+        "}\n";
+
+    struct nk_sfml_device* dev = &sfml.ogl;
+    nk_buffer_init_default(&dev->cmds);
+
+    dev->prog = glCreateProgram();
+    dev->vert_shdr = glCreateShader(GL_VERTEX_SHADER);
+    dev->frag_shdr = glCreateShader(GL_FRAGMENT_SHADER);
+
+    glShaderSource(dev->vert_shdr, 1, &vertex_shader, 0);
+    glShaderSource(dev->frag_shdr, 1, &fragment_shader, 0);
+    glCompileShader(dev->vert_shdr);
+    glCompileShader(dev->frag_shdr);
+    
+    glGetShaderiv(dev->vert_shdr, GL_COMPILE_STATUS, &status);
+    assert(status == GL_TRUE);
+
+    glGetShaderiv(dev->frag_shdr, GL_COMPILE_STATUS, &status);
+    assert(status == GL_TRUE);
+
+    glAttachShader(dev->prog, dev->vert_shdr);
+    glAttachShader(dev->prog, dev->frag_shdr);
+    glLinkProgram(dev->prog);
+
+    glGetProgramiv(dev->prog, GL_LINK_STATUS, &status);
+    assert(status == GL_TRUE);
+
+    dev->uniform_tex = glGetUniformLocation(dev->prog, "Texture");
+    dev->uniform_proj = glGetUniformLocation(dev->prog, "ProjMtx");
+    dev->attrib_pos = glGetAttribLocation(dev->prog, "Position");
+    dev->attrib_uv = glGetAttribLocation(dev->prog, "TexCoord");
+    dev->attrib_col = glGetAttribLocation(dev->prog, "Color");
+
+    {
+        /* buffer setup */
+        GLsizei vs = sizeof(struct nk_sfml_vertex);
+        size_t vp = offsetof(struct nk_sfml_vertex, position);
+        size_t vt = offsetof(struct nk_sfml_vertex, uv);
+        size_t vc = offsetof(struct nk_sfml_vertex, col);
+
+        glGenBuffers(1, &dev->vbo);
+        glGenBuffers(1, &dev->ebo);
+        glGenVertexArrays(1, &dev->vao);
+
+        glBindVertexArray(dev->vao);
+        glBindBuffer(GL_ARRAY_BUFFER, dev->vbo);
+        glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, dev->ebo);
+
+        glEnableVertexAttribArray((GLuint)dev->attrib_pos);
+        glEnableVertexAttribArray((GLuint)dev->attrib_uv);
+        glEnableVertexAttribArray((GLuint)dev->attrib_col);
+
+        glVertexAttribPointer((GLuint)dev->attrib_pos, 2, GL_FLOAT, GL_FALSE, vs, (void*)vp);
+        glVertexAttribPointer((GLuint)dev->attrib_uv, 2, GL_FLOAT, GL_FALSE, vs, (void*)vt);
+        glVertexAttribPointer((GLuint)dev->attrib_col, 4, GL_UNSIGNED_BYTE, GL_TRUE, vs, (void*)vc);
+    }
+
+    glBindTexture(GL_TEXTURE_2D, 0);
+    glBindBuffer(GL_ARRAY_BUFFER, 0);
+    glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
+    glBindVertexArray(0);
+}
+
+NK_API void
+nk_sfml_device_destroy(void)
+{
+    struct nk_sfml_device* dev = &sfml.ogl;
+
+    glDetachShader(dev->prog, dev->vert_shdr);
+    glDetachShader(dev->prog, dev->frag_shdr);
+    glDeleteShader(dev->vert_shdr);
+    glDeleteShader(dev->vert_shdr);
+    glDeleteProgram(dev->prog);
+    glDeleteTextures(1, &dev->font_tex);
+    glDeleteBuffers(1, &dev->vbo);
+    glDeleteBuffers(1, &dev->ebo);
+    nk_buffer_free(&dev->cmds);
+}
+
+NK_INTERN void
+nk_sfml_device_upload_atlas(const void* image, int width, int height)
+{
+    struct nk_sfml_device* dev = &sfml.ogl;
+    glGenTextures(1, &dev->font_tex);
+    glBindTexture(GL_TEXTURE_2D, dev->font_tex);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, (GLsizei)width, (GLsizei)height, 0, 
+                GL_RGBA, GL_UNSIGNED_BYTE, image);
+}
+
+NK_API void
+nk_sfml_render(enum nk_anti_aliasing AA, int max_vertex_buffer, int max_element_buffer)
+{
+    /* setup global state */
+    struct nk_sfml_device* dev = &sfml.ogl;
+
+    int window_width = sfml.window->getSize().x;
+    int window_height = sfml.window->getSize().y;
+
+    GLfloat ortho[4][4] = 
+    {
+        {2.0f, 0.0f, 0.0f, 0.0f},
+        {0.0f,-2.0f, 0.0f, 0.0f},
+        {0.0f, 0.0f,-1.0f, 0.0f},
+        {-1.0f,1.0f, 0.0f, 1.0f},
+    };
+
+    ortho[0][0] /= (GLfloat)window_width;
+    ortho[1][1] /= (GLfloat)window_height;
+
+    glViewport(0, 0, window_width, window_height);
+    glEnable(GL_BLEND);
+    glBlendEquation(GL_FUNC_ADD);
+    glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+    glDisable(GL_CULL_FACE);
+    glDisable(GL_DEPTH_TEST);
+    glEnable(GL_SCISSOR_TEST);
+    glActiveTexture(GL_TEXTURE0);
+
+    /* setup program */
+    glUseProgram(dev->prog);
+    glUniform1i(dev->uniform_tex, 0);
+    glUniformMatrix4fv(dev->uniform_proj, 1, GL_FALSE, &ortho[0][0]);
+    {
+        /* convert from command queue into draw list and draw to screen */
+        const struct nk_draw_command *cmd;
+        void *vertices, *elements;
+        const nk_draw_index *offset = NULL;
+
+        /* allocate vertex and element buffer */
+        glBindVertexArray(dev->vao);
+        glBindBuffer(GL_ARRAY_BUFFER, dev->vbo);
+        glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, dev->ebo);
+
+        glBufferData(GL_ARRAY_BUFFER, max_vertex_buffer, NULL, GL_STREAM_DRAW);
+        glBufferData(GL_ELEMENT_ARRAY_BUFFER, max_element_buffer, NULL, GL_STREAM_DRAW);
+
+        /* load vertices/elements directly into vertex/element buffer */
+        vertices = glMapBuffer(GL_ARRAY_BUFFER, GL_WRITE_ONLY);
+        elements = glMapBuffer(GL_ELEMENT_ARRAY_BUFFER, GL_WRITE_ONLY);
+
+        {
+            /* fill convert configuration */
+            struct nk_convert_config config;
+
+            static const struct nk_draw_vertex_layout_element vertex_layout[] = 
+            {
+                {NK_VERTEX_POSITION, NK_FORMAT_FLOAT, NK_OFFSETOF(struct nk_sfml_vertex, position)},
+                {NK_VERTEX_TEXCOORD, NK_FORMAT_FLOAT, NK_OFFSETOF(struct nk_sfml_vertex, uv)},
+                {NK_VERTEX_COLOR, NK_FORMAT_R8G8B8A8, NK_OFFSETOF(struct nk_sfml_vertex, col)},
+                {NK_VERTEX_LAYOUT_END}
+            };
+
+            NK_MEMSET(&config, 0, sizeof(config));
+            config.vertex_layout = vertex_layout;
+            config.vertex_size = sizeof(struct nk_sfml_vertex);
+            config.vertex_alignment = NK_ALIGNOF(struct nk_sfml_vertex);
+            config.null = dev->null;
+            config.circle_segment_count = 22;
+            config.curve_segment_count = 22;
+            config.arc_segment_count = 22;
+            config.global_alpha = 1.0f;
+            config.shape_AA = AA;
+            config.line_AA = AA;
+
+            /* setup buffers to load vertices and elements */
+            {
+                struct nk_buffer vbuf, ebuf;
+                nk_buffer_init_fixed(&vbuf, vertices, (nk_size)max_vertex_buffer);
+                nk_buffer_init_fixed(&ebuf, elements, (nk_size)max_element_buffer);
+                nk_convert(&sfml.ctx, &dev->cmds, &vbuf, &ebuf, &config);
+            }
+        }
+
+        glUnmapBuffer(GL_ARRAY_BUFFER);
+        glUnmapBuffer(GL_ELEMENT_ARRAY_BUFFER);
+
+        /* iterate over and execute each draw command */
+        nk_draw_foreach(cmd, &sfml.ctx, &dev->cmds)
+        {
+            if (!cmd->elem_count) continue;
+
+            glBindTexture(GL_TEXTURE_2D, (GLuint)cmd->texture.id);
+            glScissor(
+                (GLint)(cmd->clip_rect.x),
+                (GLint)((window_height - (GLint)(cmd->clip_rect.y + cmd->clip_rect.h))),
+                (GLint)(cmd->clip_rect.w),
+                (GLint)(cmd->clip_rect.h));
+            glDrawElements(GL_TRIANGLES, (GLsizei)cmd->elem_count, GL_UNSIGNED_SHORT, offset);
+            offset += cmd->elem_count;
+        }
+        nk_clear(&sfml.ctx);
+    }
+
+    glUseProgram(0);
+    glBindBuffer(GL_ARRAY_BUFFER, 0);
+    glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
+    glBindVertexArray(0);
+    glDisable(GL_BLEND);
+    glDisable(GL_SCISSOR_TEST);
+}
+
+static void
+nk_sfml_clipboard_paste(nk_handle usr, struct nk_text_edit* edit)
+{
+    /* Not Implemented in SFML 
+    sf::Clipboard clipboard(sfml.window);
+    const char* text = clipboard.getText();
+
+    if(text)
+        nk_textedit_paste(edit, text, nk_strlen(text));
+        (void)usr;
+    */
+}
+
+static void
+nk_sfml_clipboard_copy(nk_handle usr, const char* text, int len)
+{
+    /*
+    char* str = 0;
+    (void)usr;
+    if(!len)
+        return;
+    str = (char*)malloc((size_t)len+1);
+    if(!str)
+        return;
+    memcpy(str, text, (size_t)len);
+    str[len] = '\0';
+
+     Not Implemented in SFML
+    sf::Clipboard clipboard(sfml.window);
+    clipboard.setText(str);
+    
+    free(str);
+    */
+}
+
+NK_API struct nk_context*
+nk_sfml_init(sf::Window* window)
+{
+    sfml.window = window;
+    nk_init_default(&sfml.ctx, 0);
+    sfml.ctx.clip.copy = nk_sfml_clipboard_copy;
+    sfml.ctx.clip.paste = nk_sfml_clipboard_paste;
+    sfml.ctx.clip.userdata = nk_handle_ptr(0);
+    nk_sfml_device_create();
+    return &sfml.ctx;
+}
+
+NK_API void
+nk_sfml_font_stash_begin(struct nk_font_atlas** atlas)
+{
+    nk_font_atlas_init_default(&sfml.atlas);
+    nk_font_atlas_begin(&sfml.atlas);
+    *atlas = &sfml.atlas;
+}
+
+NK_API void
+nk_sfml_font_stash_end(void)
+{
+    const void* image;
+    int w, h;
+    image = nk_font_atlas_bake(&sfml.atlas, &w, &h, NK_FONT_ATLAS_RGBA32);
+    nk_sfml_device_upload_atlas(image, w, h);
+    nk_font_atlas_end(&sfml.atlas, nk_handle_id((int)sfml.ogl.font_tex), &sfml.ogl.null);
+    if(sfml.atlas.default_font)
+        nk_style_set_font(&sfml.ctx, &sfml.atlas.default_font->handle);
+}
+
+NK_API int
+nk_sfml_handle_event(sf::Event* event)
+{
+    struct nk_context* ctx = &sfml.ctx;
+
+    /* optional grabbing behavior */
+    if(ctx->input.mouse.grab)
+        ctx->input.mouse.grab = 0;
+    else if(ctx->input.mouse.ungrab)
+    {
+        int x = (int)ctx->input.mouse.prev.x;
+        int y = (int)ctx->input.mouse.prev.y;
+        
+        sf::Mouse::setPosition(sf::Vector2i(x, y), *sfml.window);
+        ctx->input.mouse.ungrab = 0;
+    }
+
+
+    if(event->type == sf::Event::KeyReleased || event->type == sf::Event::KeyPressed)
+    {
+        int down = event->type == sf::Event::KeyPressed;
+        sf::Keyboard::Key key = event->key.code;
+
+        if(key == sf::Keyboard::RShift || key == sf::Keyboard::LShift)
+            nk_input_key(ctx, NK_KEY_SHIFT, down);
+        else if(key == sf::Keyboard::Delete)
+            nk_input_key(ctx, NK_KEY_DEL, down);
+        else if(key == sf::Keyboard::Return)
+            nk_input_key(ctx, NK_KEY_ENTER, down);
+        else if(key == sf::Keyboard::Tab)
+            nk_input_key(ctx, NK_KEY_TAB, down);
+        else if(key == sf::Keyboard::BackSpace)
+            nk_input_key(ctx, NK_KEY_BACKSPACE, down);
+        else if(key == sf::Keyboard::Home)
+        {
+            nk_input_key(ctx, NK_KEY_TEXT_START, down);
+            nk_input_key(ctx, NK_KEY_SCROLL_START, down);
+        }
+        else if(key == sf::Keyboard::End)
+        {
+            nk_input_key(ctx, NK_KEY_TEXT_END, down);
+            nk_input_key(ctx, NK_KEY_SCROLL_END, down);
+        }
+        else if(key == sf::Keyboard::PageDown)
+            nk_input_key(ctx, NK_KEY_SCROLL_DOWN, down);
+        else if(key == sf::Keyboard::PageUp)
+            nk_input_key(ctx, NK_KEY_SCROLL_DOWN, down);
+        else if(key == sf::Keyboard::Z)
+            nk_input_key(ctx, NK_KEY_TEXT_UNDO, down && sf::Keyboard::isKeyPressed(sf::Keyboard::LControl));
+        else if(key == sf::Keyboard::R)
+            nk_input_key(ctx, NK_KEY_TEXT_REDO, down && sf::Keyboard::isKeyPressed(sf::Keyboard::LControl));
+        else if(key == sf::Keyboard::C)
+            nk_input_key(ctx, NK_KEY_COPY, down && sf::Keyboard::isKeyPressed(sf::Keyboard::LControl));
+        else if(key == sf::Keyboard::V)
+            nk_input_key(ctx, NK_KEY_PASTE, down && sf::Keyboard::isKeyPressed(sf::Keyboard::LControl));
+        else if(key == sf::Keyboard::X)
+            nk_input_key(ctx, NK_KEY_CUT, down && sf::Keyboard::isKeyPressed(sf::Keyboard::LControl));
+        else if(key == sf::Keyboard::B)
+            nk_input_key(ctx, NK_KEY_TEXT_LINE_START, down && sf::Keyboard::isKeyPressed(sf::Keyboard::LControl));
+        else if(key == sf::Keyboard::E)
+            nk_input_key(ctx, NK_KEY_TEXT_LINE_END, down && sf::Keyboard::isKeyPressed(sf::Keyboard::LControl));
+        else if(key == sf::Keyboard::Up)
+            nk_input_key(ctx, NK_KEY_UP, down);
+        else if(key == sf::Keyboard::Down)
+            nk_input_key(ctx, NK_KEY_DOWN, down);
+        else if(key == sf::Keyboard::Left)
+        {
+            if(sf::Keyboard::isKeyPressed(sf::Keyboard::LControl))
+                nk_input_key(ctx, NK_KEY_TEXT_WORD_LEFT, down);
+            else
+                nk_input_key(ctx, NK_KEY_LEFT, down);
+        }
+        else if(key == sf::Keyboard::Right)
+        {
+            if(sf::Keyboard::isKeyPressed(sf::Keyboard::LControl))
+                nk_input_key(ctx, NK_KEY_TEXT_WORD_RIGHT, down);
+            else
+                nk_input_key(ctx, NK_KEY_RIGHT, down);
+        }
+        else return 0;
+
+        return 1;
+    }
+    else if(event->type == sf::Event::MouseButtonPressed || event->type == sf::Event::MouseButtonReleased)
+    {
+        int down = event->type == sf::Event::MouseButtonPressed;
+        const int x = event->mouseButton.x;
+        const int y = event->mouseButton.y;
+
+        if(event->mouseButton.button == sf::Mouse::Left)
+            nk_input_button(ctx, NK_BUTTON_LEFT, x, y, down);
+        if(event->mouseButton.button == sf::Mouse::Middle)
+            nk_input_button(ctx, NK_BUTTON_MIDDLE, x, y, down);
+        if(event->mouseButton.button == sf::Mouse::Right)
+            nk_input_button(ctx, NK_BUTTON_RIGHT, x, y, down);
+        else
+            return 0;
+
+        return 1;
+    }
+    else if(event->type == sf::Event::MouseMoved)
+    {
+        nk_input_motion(ctx, event->mouseMove.x, event->mouseMove.y);
+
+        return 1;
+    }
+    else if(event->type == sf::Event::TouchBegan || event->type == sf::Event::TouchEnded)
+    {
+        int down = event->type == sf::Event::TouchBegan;
+        const int x = event->touch.x;
+        const int y = event->touch.y;
+
+        nk_input_button(ctx, NK_BUTTON_LEFT, x, y, down);
+
+        return 1;
+    }
+    else if(event->type == sf::Event::TouchMoved)
+    {
+        if(ctx->input.mouse.grabbed)
+        {
+            int x = (int)ctx->input.mouse.prev.x;
+            int y = (int)ctx->input.mouse.prev.y;
+
+            nk_input_motion(ctx, x + event->touch.x, y + event->touch.y);
+        }
+        else
+            nk_input_motion(ctx, event->touch.x, event->touch.y);
+
+        return 1;
+    }
+    else if(event->type == sf::Event::TextEntered)
+    {
+        nk_input_unicode(ctx, event->text.unicode);
+
+        return 1;
+    }
+    else if(event->type == sf::Event::MouseWheelScrolled)
+    {
+        nk_input_scroll(ctx, event->mouseWheelScroll.delta);
+
+        return 1;
+    }
+
+    return 0;
+}
+
+NK_API
+void nk_sfml_shutdown(void)
+{
+    nk_font_atlas_clear(&sfml.atlas);
+    nk_free(&sfml.ctx);
+    nk_sfml_device_destroy();
+    memset(&sfml, 0, sizeof(sfml));
+}
+
+#endif