Added xlib OpenGL version 2 demo

demo/x11_opengl2/Makefile

@@ -0,0 +1,26 @@
+# Install
+BIN = demo
+
+# Compiler
+CC = clang
+DCC = gcc
+
+# Flags
+CFLAGS = -std=c99 -pedantic -O2
+
+SRC = main.c
+OBJ = $(SRC:.c=.o)
+
+# Modes
+.PHONY: gcc
+gcc: CC = gcc
+gcc: $(BIN)
+
+.PHONY: clang
+clang: CC = clang
+clang: $(BIN)
+
+$(BIN):
+	@mkdir -p bin
+	rm -f bin/$(BIN) $(OBJS)
+	$(CC) $(SRC) $(CFLAGS) -o bin/$(BIN) -lX11 -lm -lGL -lm -lGLU

demo/x11_opengl2/main.c

@@ -0,0 +1,304 @@
+/* nuklear - v1.00 - 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 <time.h>
+#include <limits.h>
+
+#include <GL/glx.h>
+#include <GL/glxext.h>
+
+#define NK_INCLUDE_FIXED_TYPES
+#define NK_INCLUDE_STANDARD_IO
+#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_XLIB_GL2_IMPLEMENTATION
+#include "../../nuklear.h"
+#include "nuklear_xlib_gl2.h"
+
+#define WINDOW_WIDTH 800
+#define WINDOW_HEIGHT 600
+
+#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
+ *
+ * ===============================================================*/
+struct XWindow {
+    Display *dpy;
+    Window win;
+    XVisualInfo *vis;
+    Colormap cmap;
+    XSetWindowAttributes swa;
+    XWindowAttributes attr;
+    GLXFBConfig fbc;
+    int width, height;
+};
+static int gl_err = FALSE;
+static int gl_error_handler(Display *dpy, XErrorEvent *ev)
+{UNUSED((dpy, ev)); gl_err = TRUE;return 0;}
+
+static void
+die(const char *fmt, ...)
+{
+    va_list ap;
+    va_start(ap, fmt);
+    vfprintf(stderr, fmt, ap);
+    va_end(ap);
+    fputs("\n", stderr);
+    exit(EXIT_FAILURE);
+}
+
+static int
+has_extension(const char *string, const char *ext)
+{
+    const char *start, *where, *term;
+    where = strchr(ext, ' ');
+    if (where || *ext == '\0')
+        return FALSE;
+
+    for (start = string;;) {
+        where = strstr((const char*)start, ext);
+        if (!where) break;
+        term = where + strlen(ext);
+        if (where == start || *(where - 1) == ' ') {
+            if (*term == ' ' || *term == '\0')
+                return TRUE;
+        }
+        start = term;
+    }
+    return FALSE;
+}
+
+int main(int argc, char **argv)
+{
+    /* Platform */
+    int running = 1;
+    struct XWindow win;
+    GLXContext glContext;
+    struct nk_context *ctx;
+    struct nk_color background;
+
+    memset(&win, 0, sizeof(win));
+    win.dpy = XOpenDisplay(NULL);
+    if (!win.dpy) die("Failed to open X display\n");
+    {
+        /* check glx version */
+        int glx_major, glx_minor;
+        if (!glXQueryVersion(win.dpy, &glx_major, &glx_minor))
+            die("[X11]: Error: Failed to query OpenGL version\n");
+        if ((glx_major == 1 && glx_minor < 3) || (glx_major < 1))
+            die("[X11]: Error: Invalid GLX version!\n");
+    }
+    {
+        /* find and pick matching framebuffer visual */
+        int fb_count;
+        static GLint attr[] = {
+            GLX_X_RENDERABLE,   True,
+            GLX_DRAWABLE_TYPE,  GLX_WINDOW_BIT,
+            GLX_RENDER_TYPE,    GLX_RGBA_BIT,
+            GLX_X_VISUAL_TYPE,  GLX_TRUE_COLOR,
+            GLX_RED_SIZE,       8,
+            GLX_GREEN_SIZE,     8,
+            GLX_BLUE_SIZE,      8,
+            GLX_ALPHA_SIZE,     8,
+            GLX_DEPTH_SIZE,     24,
+            GLX_STENCIL_SIZE,   8,
+            GLX_DOUBLEBUFFER,   True,
+            None
+        };
+        GLXFBConfig *fbc;
+        fbc = glXChooseFBConfig(win.dpy, DefaultScreen(win.dpy), attr, &fb_count);
+        if (!fbc) die("[X11]: Error: failed to retrieve framebuffer configuration\n");
+        {
+            /* pick framebuffer with most samples per pixel */
+            int i;
+            int fb_best = -1, best_num_samples = -1;
+            for (i = 0; i < fb_count; ++i) {
+                XVisualInfo *vi = glXGetVisualFromFBConfig(win.dpy, fbc[i]);
+                if (vi) {
+                    int sample_buffer, samples;
+                    glXGetFBConfigAttrib(win.dpy, fbc[i], GLX_SAMPLE_BUFFERS, &sample_buffer);
+                    glXGetFBConfigAttrib(win.dpy, fbc[i], GLX_SAMPLES, &samples);
+                    if ((fb_best < 0) || (sample_buffer && samples > best_num_samples))
+                        fb_best = i; best_num_samples = samples;
+                }
+            }
+            win.fbc = fbc[fb_best];
+            XFree(fbc);
+            win.vis = glXGetVisualFromFBConfig(win.dpy, win.fbc);
+        }
+    }
+    {
+        /* create window */
+        win.cmap = XCreateColormap(win.dpy, RootWindow(win.dpy, win.vis->screen), win.vis->visual, AllocNone);
+        win.swa.colormap =  win.cmap;
+        win.swa.background_pixmap = None;
+        win.swa.border_pixel = 0;
+        win.swa.event_mask =
+            ExposureMask | KeyPressMask | KeyReleaseMask |
+            ButtonPress | ButtonReleaseMask| ButtonMotionMask |
+            Button1MotionMask | Button3MotionMask | Button4MotionMask | Button5MotionMask|
+            PointerMotionMask| StructureNotifyMask;
+        win.win = XCreateWindow(win.dpy, RootWindow(win.dpy, win.vis->screen), 0, 0,
+            WINDOW_WIDTH, WINDOW_HEIGHT, 0, win.vis->depth, InputOutput,
+            win.vis->visual, CWBorderPixel|CWColormap|CWEventMask, &win.swa);
+        if (!win.win) die("[X11]: Failed to create window\n");
+        XFree(win.vis);
+        XStoreName(win.dpy, win.win, "Demo");
+        XMapWindow(win.dpy, win.win);
+    }
+    {
+        /* create opengl context */
+        typedef GLXContext(*glxCreateContext)(Display*, GLXFBConfig, GLXContext, Bool, const int*);
+        int(*old_handler)(Display*, XErrorEvent*) = XSetErrorHandler(gl_error_handler);
+        const char *extensions_str = glXQueryExtensionsString(win.dpy, DefaultScreen(win.dpy));
+        glxCreateContext create_context = (glxCreateContext)
+            glXGetProcAddressARB((const GLubyte*)"glXCreateContextAttribsARB");
+
+        gl_err = FALSE;
+        if (!has_extension(extensions_str, "GLX_ARB_create_context") || !create_context) {
+            fprintf(stdout, "[X11]: glXCreateContextAttribARB() not found...\n");
+            fprintf(stdout, "[X11]: ... using old-style GLX context\n");
+            glContext = glXCreateNewContext(win.dpy, win.fbc, GLX_RGBA_TYPE, 0, True);
+        } else {
+            GLint attr[] = {
+                GLX_CONTEXT_MAJOR_VERSION_ARB, 3,
+                GLX_CONTEXT_MINOR_VERSION_ARB, 0,
+                None
+            };
+            glContext = create_context(win.dpy, win.fbc, 0, True, attr);
+            XSync(win.dpy, False);
+            if (gl_err || !glContext) {
+                /* Could not create GL 3.0 context. Fallback to old 2.x context.
+                 * If a version below 3.0 is requested, implementations will
+                 * return the newest context version compatible with OpenGL
+                 * version less than version 3.0.*/
+                attr[1] = 1; attr[3] = 0;
+                gl_err = FALSE;
+                fprintf(stdout, "[X11] Failed to create OpenGL 3.0 context\n");
+                fprintf(stdout, "[X11] ... using old-style GLX context!\n");
+                glContext = create_context(win.dpy, win.fbc, 0, True, attr);
+            }
+        }
+        XSync(win.dpy, False);
+        XSetErrorHandler(old_handler);
+        if (gl_err || !glContext)
+            die("[X11]: Failed to create an OpenGL context\n");
+        glXMakeCurrent(win.dpy, win.win, glContext);
+    }
+
+    ctx = nk_x11_init(win.dpy, win.win);
+    /* Load Fonts: if none of these are loaded a default font will be used  */
+    {struct nk_font_atlas *atlas;
+    nk_x11_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_x11_font_stash_end();
+    /*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 (running)
+    {
+        /* Input */
+        XEvent evt;
+        nk_input_begin(ctx);
+        while (XCheckWindowEvent(win.dpy, win.win, win.swa.event_mask, &evt)){
+            if (XFilterEvent(&evt, win.win)) continue;
+            nk_x11_handle_event(&evt);
+        }
+        nk_input_end(ctx);
+
+        /* GUI */
+        {struct nk_panel layout;
+        if (nk_begin(ctx, &layout, "Demo", nk_rect(50, 50, 200, 200),
+            NK_WINDOW_BORDER|NK_WINDOW_MOVABLE|NK_WINDOW_SCALABLE|
+            NK_WINDOW_CLOSABLE|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", NK_BUTTON_DEFAULT))
+                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_end(ctx);}
+        if (nk_window_is_closed(ctx, "Demo")) break;
+
+        /* -------------- EXAMPLES ---------------- */
+        /*calculator(ctx);*/
+        /*overview(ctx);*/
+        /*node_editor(ctx);*/
+        /* ----------------------------------------- */
+
+        /* Draw */
+        {float bg[4];
+        nk_color_fv(bg, background);
+        XGetWindowAttributes(win.dpy, win.win, &win.attr);
+        glViewport(0, 0, win.width, win.height);
+        glClear(GL_COLOR_BUFFER_BIT);
+        glClearColor(bg[0], bg[1], bg[2], bg[3]);
+        /* IMPORTANT: `nk_x11_render` modifies some global OpenGL state
+         * with blending, scissor, face culling, depth test and viewport and
+         * defaults everything back into a default state.
+         * Make sure to either a.) save and restore or b.) reset your own state after
+         * rendering the UI. */
+        nk_x11_render(NK_ANTI_ALIASING_ON, MAX_VERTEX_BUFFER, MAX_ELEMENT_BUFFER);
+        glXSwapBuffers(win.dpy, win.win);}
+    }
+
+    nk_x11_shutdown();
+    glXMakeCurrent(win.dpy, 0, 0);
+    glXDestroyContext(win.dpy, glContext);
+    XUnmapWindow(win.dpy, win.win);
+    XFreeColormap(win.dpy, win.cmap);
+    XDestroyWindow(win.dpy, win.win);
+    XCloseDisplay(win.dpy);
+    return 0;
+
+}

demo/x11_opengl2/nuklear_xlib_gl2.h

@@ -0,0 +1,294 @@
+/*
+ * Nuklear - v1.00 - public domain
+ * no warrenty implied; use at your own risk.
+ * authored from 2015-2016 by Micha Mettke
+ */
+/*
+ * ==============================================================
+ *
+ *                              API
+ *
+ * ===============================================================
+ */
+#ifndef NK_XLIB_GL3_H_
+#define NK_XLIB_GL3_H_
+
+#include <X11/Xlib.h>
+NK_API struct nk_context*   nk_x11_init(Display *dpy, Window win);
+NK_API void                 nk_x11_font_stash_begin(struct nk_font_atlas **atlas);
+NK_API void                 nk_x11_font_stash_end(void);
+NK_API void                 nk_x11_handle_event(XEvent *evt);
+NK_API void                 nk_x11_render(enum nk_anti_aliasing, int max_vertex_buffer, int max_element_buffer);
+NK_API void                 nk_x11_shutdown(void);
+
+#endif
+/*
+ * ==============================================================
+ *
+ *                          IMPLEMENTATION
+ *
+ * ===============================================================
+ */
+#ifdef NK_XLIB_GL2_IMPLEMENTATION
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <X11/Xlib.h>
+#include <X11/Xutil.h>
+#include <X11/Xresource.h>
+#include <X11/Xlocale.h>
+
+#include <GL/gl.h>
+
+#ifndef FALSE
+#define FALSE 0
+#endif
+#ifndef TRUE
+#define TRUE 1
+#endif
+
+struct nk_x11_device {
+    struct nk_buffer cmds;
+    struct nk_draw_null_texture null;
+    GLuint font_tex;
+};
+
+static struct nk_x11 {
+    struct nk_x11_device ogl;
+    struct nk_context ctx;
+    struct nk_font_atlas atlas;
+    Display *dpy;
+    Window win;
+} x11;
+
+NK_INTERN void
+nk_x11_device_upload_atlas(const void *image, int width, int height)
+{
+    struct nk_x11_device *dev = &x11.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_x11_render(enum nk_anti_aliasing AA, int max_vertex_buffer, int max_element_buffer)
+{
+    /* setup global state */
+    struct nk_x11_device *dev = &x11.ogl;
+    int width, height;
+
+    XWindowAttributes attr;
+    XGetWindowAttributes(x11.dpy, x11.win, &attr);
+    width = attr.width;
+    height = attr.height;
+
+    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);
+
+    /* setup viewport/project */
+    glViewport(0,0,(GLsizei)width,(GLsizei)height);
+    glMatrixMode(GL_PROJECTION);
+    glPushMatrix();
+    glLoadIdentity();
+    glOrtho(0.0f, width, 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_draw_vertex);
+        size_t vp = offsetof(struct nk_draw_vertex, position);
+        size_t vt = offsetof(struct nk_draw_vertex, uv);
+        size_t vc = offsetof(struct nk_draw_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;
+        memset(&config, 0, sizeof(config));
+        config.global_alpha = 1.0f;
+        config.shape_AA = AA;
+        config.line_AA = AA;
+        config.circle_segment_count = 22;
+        config.curve_segment_count = 22;
+        config.arc_segment_count = 22;
+        config.null = dev->null;
+
+        /* convert shapes into vertexes */
+        nk_buffer_init_default(&vbuf);
+        nk_buffer_init_default(&ebuf);
+        nk_convert(&x11.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, &x11.ctx, &dev->cmds)
+        {
+            if (!cmd->elem_count) continue;
+            glBindTexture(GL_TEXTURE_2D, (GLuint)cmd->texture.id);
+            glScissor(
+                (GLint)(cmd->clip_rect.x),
+                (GLint)((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(&x11.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();
+
+}
+
+NK_API void
+nk_x11_font_stash_begin(struct nk_font_atlas **atlas)
+{
+    nk_font_atlas_init_default(&x11.atlas);
+    nk_font_atlas_begin(&x11.atlas);
+    *atlas = &x11.atlas;
+}
+
+NK_API void
+nk_x11_font_stash_end(void)
+{
+    const void *image; int w, h;
+    image = nk_font_atlas_bake(&x11.atlas, &w, &h, NK_FONT_ATLAS_RGBA32);
+    nk_x11_device_upload_atlas(image, w, h);
+    nk_font_atlas_end(&x11.atlas, nk_handle_id((int)x11.ogl.font_tex), &x11.ogl.null);
+    if (x11.atlas.default_font)
+        nk_style_set_font(&x11.ctx, &x11.atlas.default_font->handle);
+}
+
+NK_API void
+nk_x11_handle_event(XEvent *evt)
+{
+    struct nk_context *ctx = &x11.ctx;
+    if (evt->type == KeyPress || evt->type == KeyRelease)
+    {
+        /* Key handler */
+        int ret, down = (evt->type == KeyPress);
+        KeySym *code = XGetKeyboardMapping(x11.dpy, (KeyCode)evt->xkey.keycode, 1, &ret);
+        if (*code == XK_Shift_L || *code == XK_Shift_R) nk_input_key(ctx, NK_KEY_SHIFT, down);
+        else if (*code == XK_Delete)    nk_input_key(ctx, NK_KEY_DEL, down);
+        else if (*code == XK_Return)    nk_input_key(ctx, NK_KEY_ENTER, down);
+        else if (*code == XK_Tab)       nk_input_key(ctx, NK_KEY_TAB, down);
+        else if (*code == XK_Left)      nk_input_key(ctx, NK_KEY_LEFT, down);
+        else if (*code == XK_Right)     nk_input_key(ctx, NK_KEY_RIGHT, down);
+        else if (*code == XK_BackSpace) nk_input_key(ctx, NK_KEY_BACKSPACE, down);
+        else if (*code == XK_Home)  nk_input_key(ctx, NK_KEY_TEXT_START, down);
+        else if (*code == XK_End)  nk_input_key(ctx, NK_KEY_TEXT_END, down);
+        else if (*code == XK_space && !down) nk_input_char(ctx, ' ');
+        else {
+            if (*code == 'c' && (evt->xkey.state & ControlMask))
+                nk_input_key(ctx, NK_KEY_COPY, down);
+            else if (*code == 'v' && (evt->xkey.state & ControlMask))
+                nk_input_key(ctx, NK_KEY_PASTE, down);
+            else if (*code == 'x' && (evt->xkey.state & ControlMask))
+                nk_input_key(ctx, NK_KEY_CUT, down);
+            else if (*code == 'z' && (evt->xkey.state & ControlMask))
+                nk_input_key(ctx, NK_KEY_TEXT_UNDO, down);
+            else if (*code == 'r' && (evt->xkey.state & ControlMask))
+                nk_input_key(ctx, NK_KEY_TEXT_REDO, down);
+            else if (*code == XK_Left && (evt->xkey.state & ControlMask))
+                nk_input_key(ctx, NK_KEY_TEXT_WORD_LEFT, down);
+            else if (*code == XK_Right && (evt->xkey.state & ControlMask))
+                nk_input_key(ctx, NK_KEY_TEXT_WORD_RIGHT, down);
+            else if (*code == 'b' && (evt->xkey.state & ControlMask))
+                nk_input_key(ctx, NK_KEY_TEXT_LINE_START, down);
+            else if (*code == 'e' && (evt->xkey.state & ControlMask))
+                nk_input_key(ctx, NK_KEY_TEXT_LINE_END, down);
+            else if (!down) {
+                char buf[32];
+                KeySym keysym = 0;
+                if (XLookupString((XKeyEvent*)evt, buf, 32, &keysym, NULL) != NoSymbol)
+                    nk_input_glyph(ctx, buf);
+            }
+        }
+        XFree(code);
+    } else if (evt->type == ButtonPress || evt->type == ButtonRelease) {
+        /* Button handler */
+        int down = (evt->type == ButtonPress);
+        const int x = evt->xbutton.x, y = evt->xbutton.y;
+        if (evt->xbutton.button == Button1)
+            nk_input_button(ctx, NK_BUTTON_LEFT, x, y, down);
+        if (evt->xbutton.button == Button2)
+            nk_input_button(ctx, NK_BUTTON_MIDDLE, x, y, down);
+        else if (evt->xbutton.button == Button3)
+            nk_input_button(ctx, NK_BUTTON_RIGHT, x, y, down);
+        else if (evt->xbutton.button == Button4)
+            nk_input_scroll(ctx, 1.0f);
+        else if (evt->xbutton.button == Button5)
+            nk_input_scroll(ctx, -1.0f);
+
+    } else if (evt->type == MotionNotify) {
+        /* Mouse motion handler */
+        const int x = evt->xmotion.x, y = evt->xmotion.y;
+        nk_input_motion(ctx, x, y);
+    } else if (evt->type == KeymapNotify)
+        XRefreshKeyboardMapping(&evt->xmapping);
+}
+
+NK_API struct nk_context*
+nk_x11_init(Display *dpy, Window win)
+{
+    if (!setlocale(LC_ALL,"")) return 0;
+    if (!XSupportsLocale()) return 0;
+    if (!XSetLocaleModifiers("@im=none")) return 0;
+    x11.dpy = dpy;
+    x11.win = win;
+    nk_buffer_init_default(&x11.ogl.cmds);
+    nk_init_default(&x11.ctx, 0);
+    return &x11.ctx;
+}
+
+NK_API void
+nk_x11_shutdown(void)
+{
+    struct nk_x11_device *dev = &x11.ogl;
+    nk_font_atlas_clear(&x11.atlas);
+    nk_free(&x11.ctx);
+    glDeleteTextures(1, &dev->font_tex);
+    nk_buffer_free(&dev->cmds);
+    memset(&x11, 0, sizeof(x11));
+}
+
+#endif