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Merge pull request #24 from skoperst/master

Add pure C wayland demo/backend
dumblob 5 lat temu
rodzic
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bacdca7772

+ 9 - 0
demo/wayland_rawfb/Makefile

@@ -0,0 +1,9 @@
+WAYLAND=`pkg-config wayland-client --cflags --libs`
+CFLAGS?=-std=c11 -Wall -Werror -O3 -fvisibility=hidden
+
+hello_wayland: main.c 
+	$(CC) -o demo *.c $(WAYLAND) -lrt -lm
+
+
+clean:
+	$(RM) demo

+ 427 - 0
demo/wayland_rawfb/main.c

@@ -0,0 +1,427 @@
+#define _GNU_SOURCE // for O_TMPFILE
+#define NK_INCLUDE_FIXED_TYPES
+#define NK_INCLUDE_STANDARD_IO
+#define NK_INCLUDE_STANDARD_VARARGS
+#define NK_INCLUDE_DEFAULT_ALLOCATOR
+#define NK_IMPLEMENTATION
+#define NK_INCLUDE_FONT_BAKING
+#define NK_INCLUDE_DEFAULT_FONT
+#define NK_INCLUDE_SOFTWARE_FONT
+
+
+#include <wayland-client.h>
+#include <stdlib.h>
+#include <fcntl.h>
+#include <sys/mman.h>
+#include <unistd.h>
+#include <string.h>
+#include <stdio.h>
+#include <math.h>
+#include <time.h>
+#include <sys/time.h>
+#include "../../nuklear.h"
+#include "nuklear_raw_wayland.h"
+
+
+#define DTIME           20
+
+
+//WAYLAND OUTPUT INTERFACE
+static void nk_wayland_output_cb_geometry(void *data, struct wl_output *wl_output, int x, int y, int w, int h, int subpixel, const char *make, const char *model, int transform)
+{
+    printf("wl_output geometry x=%d, y=%d, w=%d, h=%d make=%s, model=%s \n", x,y,w,h, make, model);
+}
+
+static void nk_wayland_output_cb_mode(void *data, struct wl_output *wl_output, unsigned int flags, int w, int h, int refresh)
+{
+}
+
+static void nk_wayland_output_cb_done(void *data, struct wl_output *output)
+{
+
+}
+
+static void nk_wayland_output_cb_scale(void *data, struct wl_output *output, int scale)
+{
+
+}
+
+static const struct wl_output_listener nk_wayland_output_listener =
+{
+   &nk_wayland_output_cb_geometry,
+   &nk_wayland_output_cb_mode,
+   &nk_wayland_output_cb_done,
+   &nk_wayland_output_cb_scale
+};
+//-------------------------------------------------------------------- endof WAYLAND OUTPUT INTERFACE
+
+//WAYLAND POINTER INTERFACE (mouse/touchpad)
+static void nk_wayland_pointer_enter (void *data, struct wl_pointer *pointer, uint32_t serial, struct wl_surface *surface, wl_fixed_t surface_x, wl_fixed_t surface_y) 
+{
+}
+
+static void nk_wayland_pointer_leave (void *data, struct wl_pointer *pointer, uint32_t serial, struct wl_surface *surface) 
+{
+}
+
+static void nk_wayland_pointer_motion (void *data, struct wl_pointer *pointer, uint32_t time, wl_fixed_t x, wl_fixed_t y) 
+{
+    struct nk_wayland* win = (struct nk_wayland*)data;
+    win->mouse_pointer_x = wl_fixed_to_int(x);
+    win->mouse_pointer_y = wl_fixed_to_int(y);
+    
+    nk_input_motion(&(win->ctx), win->mouse_pointer_x, win->mouse_pointer_y);
+}
+
+static void nk_wayland_pointer_button (void *data, struct wl_pointer *pointer, uint32_t serial, uint32_t time, uint32_t button, uint32_t state) 
+{
+    struct nk_wayland* win = (struct nk_wayland*)data;
+    
+    if (button == 272){ //left mouse button
+        if (state == WL_POINTER_BUTTON_STATE_PRESSED) {
+           // printf("nk_input_button x=%d, y=%d press: 1 \n", win->mouse_pointer_x, win->mouse_pointer_y);
+            nk_input_button(&(win->ctx), NK_BUTTON_LEFT, win->mouse_pointer_x, win->mouse_pointer_y, 1);
+            
+        } else if (state == WL_POINTER_BUTTON_STATE_RELEASED) {
+            nk_input_button(&(win->ctx), NK_BUTTON_LEFT, win->mouse_pointer_x, win->mouse_pointer_y, 0);
+        }
+    }
+}
+
+static void nk_wayland_pointer_axis (void *data, struct wl_pointer *pointer, uint32_t time, uint32_t axis, wl_fixed_t value) 
+{
+}
+
+static struct wl_pointer_listener nk_wayland_pointer_listener = 
+{
+    &nk_wayland_pointer_enter, 
+    &nk_wayland_pointer_leave, 
+    &nk_wayland_pointer_motion, 
+    &nk_wayland_pointer_button, 
+    &nk_wayland_pointer_axis
+};
+//-------------------------------------------------------------------- endof WAYLAND POINTER INTERFACE
+
+//WAYLAND KEYBOARD INTERFACE
+static void nk_wayland_keyboard_keymap (void *data, struct wl_keyboard *keyboard, uint32_t format, int32_t fd, uint32_t size) 
+{
+}
+
+static void nk_wayland_keyboard_enter (void *data, struct wl_keyboard *keyboard, uint32_t serial, struct wl_surface *surface, struct wl_array *keys) 
+{	
+}
+
+static void nk_wayland_keyboard_leave (void *data, struct wl_keyboard *keyboard, uint32_t serial, struct wl_surface *surface) 
+{
+}
+
+static void nk_wayland_keyboard_key (void *data, struct wl_keyboard *keyboard, uint32_t serial, uint32_t time, uint32_t key, uint32_t state) 
+{
+    printf("key: %d \n", key);
+}
+
+static void nk_wayland_keyboard_modifiers (void *data, struct wl_keyboard *keyboard, uint32_t serial, uint32_t mods_depressed, uint32_t mods_latched, uint32_t mods_locked, uint32_t group) 
+{
+}
+
+static struct wl_keyboard_listener nk_wayland_keyboard_listener = 
+{
+    &nk_wayland_keyboard_keymap, 
+    &nk_wayland_keyboard_enter, 
+    &nk_wayland_keyboard_leave, 
+    &nk_wayland_keyboard_key, 
+    &nk_wayland_keyboard_modifiers
+};
+//-------------------------------------------------------------------- endof WAYLAND KEYBOARD INTERFACE
+
+//WAYLAND SEAT INTERFACE
+static void seat_capabilities (void *data, struct wl_seat *seat, uint32_t capabilities) 
+{
+     struct nk_wayland* win = (struct nk_wayland*)data;
+     
+	if (capabilities & WL_SEAT_CAPABILITY_POINTER) {
+		struct wl_pointer *pointer = wl_seat_get_pointer (seat);
+		wl_pointer_add_listener (pointer, &nk_wayland_pointer_listener, win);
+	}
+	if (capabilities & WL_SEAT_CAPABILITY_KEYBOARD) {
+		struct wl_keyboard *keyboard = wl_seat_get_keyboard (seat);
+		wl_keyboard_add_listener (keyboard, &nk_wayland_keyboard_listener, win);
+	}
+}
+
+static struct wl_seat_listener seat_listener =
+{
+    &seat_capabilities
+};
+//-------------------------------------------------------------------- endof WAYLAND SEAT INTERFACE
+
+// WAYLAND SHELL INTERFACE
+static void nk_wayland_shell_surface_ping (void *data, struct wl_shell_surface *shell_surface, uint32_t serial) 
+{
+	wl_shell_surface_pong (shell_surface, serial);
+}
+
+static void nk_wayland_shell_surface_configure (void *data, struct wl_shell_surface *shell_surface, uint32_t edges, int32_t width, int32_t height) 
+{
+}
+
+static void nk_wayland_shell_surface_popup_done (void *data, struct wl_shell_surface *shell_surface) 
+{	
+}
+
+static struct wl_shell_surface_listener nk_wayland_shell_surface_listener = 
+{
+    &nk_wayland_shell_surface_ping, 
+    &nk_wayland_shell_surface_configure, 
+    &nk_wayland_shell_surface_popup_done
+};
+//--------------------------------------------------------------------- endof WAYLAND SHELL INTERFACE
+
+
+// WAYLAND REGISTRY INTERFACE
+static void nk_wayland_registry_add_object (void *data, struct wl_registry *registry, uint32_t name, const char *interface, uint32_t version) 
+{
+    struct nk_wayland* win = (struct nk_wayland*)data;
+    
+    //printf("looking for %s interface \n", interface);
+	if (!strcmp(interface,"wl_compositor")) {
+		win->compositor = wl_registry_bind (registry, name, &wl_compositor_interface, 1);
+        
+	} else if (!strcmp(interface,"wl_shell")) {
+		win->shell = wl_registry_bind (registry, name, &wl_shell_interface, 1);
+        
+	} else if (!strcmp(interface,"wl_shm")) {
+		win->wl_shm = wl_registry_bind (registry, name, &wl_shm_interface, 1);
+        
+	} else if (!strcmp(interface,"wl_seat")) {
+		win->seat = wl_registry_bind (registry, name, &wl_seat_interface, 1);
+		wl_seat_add_listener (win->seat, &seat_listener, win);
+        
+	} else if (!strcmp(interface, "wl_output")) {
+        struct wl_output *wl_output = wl_registry_bind(registry, name, &wl_output_interface, 1);
+        wl_output_add_listener(wl_output, &nk_wayland_output_listener, NULL);
+    }
+}
+
+static void nk_wayland_registry_remove_object (void *data, struct wl_registry *registry, uint32_t name) 
+{
+}
+
+static struct wl_registry_listener nk_wayland_registry_listener = 
+{
+    &nk_wayland_registry_add_object, 
+    &nk_wayland_registry_remove_object
+};
+//------------------------------------------------------------------------------------------------ endof WAYLAND REGISTRY INTERFACE
+
+
+static void nk_wayland_init(struct nk_wayland* win)
+{
+    const void *tex;
+    
+    win->font_tex.pixels = win->tex_scratch;
+    win->font_tex.format = NK_FONT_ATLAS_ALPHA8;
+    win->font_tex.w = win->font_tex.h = 0;
+
+    if (0 == nk_init_default(&(win->ctx), 0)) {
+        return;
+    }
+
+    nk_font_atlas_init_default(&(win->atlas));
+    nk_font_atlas_begin(&(win->atlas));
+    tex = nk_font_atlas_bake(&(win->atlas), &(win->font_tex.w), &(win->font_tex.h), win->font_tex.format);
+    if (!tex) {
+        return;
+    }
+
+    switch(win->font_tex.format) {
+    case NK_FONT_ATLAS_ALPHA8:
+        win->font_tex.pitch = win->font_tex.w * 1;
+        break;
+    case NK_FONT_ATLAS_RGBA32:
+        win->font_tex.pitch = win->font_tex.w * 4;
+        break;
+    };
+    /* Store the font texture in tex scratch memory */
+    memcpy(win->font_tex.pixels, tex, win->font_tex.pitch * win->font_tex.h);
+    nk_font_atlas_end(&(win->atlas), nk_handle_ptr(NULL), NULL);
+    if (win->atlas.default_font)
+        nk_style_set_font(&(win->ctx), &(win->atlas.default_font->handle));
+    nk_style_load_all_cursors(&(win->ctx), win->atlas.cursors);
+    nk_wayland_scissor(win, 0, 0, win->width, win->height);
+    
+}
+
+static void nk_wayland_deinit(struct nk_wayland *win) 
+{
+	wl_shell_surface_destroy (win->shell_surface);
+	wl_surface_destroy (win->surface);
+}
+
+static long timestamp(void)
+{
+    struct timeval tv;
+    if (gettimeofday(&tv, NULL) < 0) return 0;
+    return (long)((long)tv.tv_sec * 1000 + (long)tv.tv_usec/1000);
+}
+
+static void sleep_for(long t)
+{
+    struct timespec req;
+    const time_t sec = (int)(t/1000);
+    const long ms = t - (sec * 1000);
+    req.tv_sec = sec;
+    req.tv_nsec = ms * 1000000L;
+    while(-1 == nanosleep(&req, &req));
+}
+
+static void nk_wayland_surf_clear(struct nk_wayland* win)
+{
+    int x, y;
+    int pix_idx;
+    
+    for (y = 0; y < win->height; y++){
+        for (x = 0; x < win->width; x++){ 
+            pix_idx = y * win->width + x;
+            win->data[pix_idx] = 0xFF000000;
+        }
+    }
+}
+
+//This causes the screen to refresh 
+static const struct wl_callback_listener frame_listener;
+
+static void redraw(void *data, struct wl_callback *callback, uint32_t time)
+{
+  //  printf("redrawing.. 1\n");
+    struct nk_wayland* win = (struct nk_wayland*)data;
+    struct nk_color col_red = {0xFF,0x00,0x00,0xA0}; //r,g,b,a
+    struct nk_color col_green = {0x00,0xFF,0x00,0xA0}; //r,g,b,a
+    wl_callback_destroy(win->frame_callback);
+    wl_surface_damage(win->surface, 0, 0, WIDTH, HEIGHT); 
+    
+
+
+    win->frame_callback = wl_surface_frame(win->surface);
+    wl_surface_attach(win->surface, win->front_buffer, 0, 0);
+    wl_callback_add_listener(win->frame_callback, &frame_listener, win);
+    wl_surface_commit(win->surface);
+    
+}
+
+
+static const struct wl_callback_listener frame_listener = {
+    redraw
+};
+
+int main () 
+{
+    long dt;
+    long started;
+    struct nk_wayland nk_wayland_ctx;
+    struct wl_backend *backend;
+    struct wl_registry *registry;
+    int running = 1;
+    
+    //1. Initialize display
+	nk_wayland_ctx.display = wl_display_connect (NULL);
+    if (nk_wayland_ctx.display == NULL) {
+        printf("no wayland display found. do you have wayland composer running? \n");
+        return -1;
+    }
+    
+	registry = wl_display_get_registry (nk_wayland_ctx.display);
+	wl_registry_add_listener (registry, &nk_wayland_registry_listener, &nk_wayland_ctx);
+	wl_display_roundtrip (nk_wayland_ctx.display);
+	
+    
+    //2. Create Window
+    nk_wayland_ctx.width = WIDTH;
+	nk_wayland_ctx.height = HEIGHT;
+	nk_wayland_ctx.surface = wl_compositor_create_surface (nk_wayland_ctx.compositor);
+	nk_wayland_ctx.shell_surface = wl_shell_get_shell_surface (nk_wayland_ctx.shell, nk_wayland_ctx.surface);
+	wl_shell_surface_add_listener (nk_wayland_ctx.shell_surface, &nk_wayland_shell_surface_listener, &nk_wayland_ctx);
+	wl_shell_surface_set_toplevel (nk_wayland_ctx.shell_surface);
+	
+    
+    nk_wayland_ctx.frame_callback = wl_surface_frame(nk_wayland_ctx.surface);
+    wl_callback_add_listener(nk_wayland_ctx.frame_callback, &frame_listener, &nk_wayland_ctx);
+    
+	size_t size = WIDTH * HEIGHT * 4;
+	char *xdg_runtime_dir = getenv ("XDG_RUNTIME_DIR");
+	int fd = open (xdg_runtime_dir, O_TMPFILE|O_RDWR|O_EXCL, 0600);
+	ftruncate (fd, size);
+	nk_wayland_ctx.data = mmap (NULL, size, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
+	struct wl_shm_pool *pool = wl_shm_create_pool (nk_wayland_ctx.wl_shm, fd, size);
+	nk_wayland_ctx.front_buffer = wl_shm_pool_create_buffer (pool, 0, WIDTH, HEIGHT, WIDTH*4, WL_SHM_FORMAT_XRGB8888);
+	wl_shm_pool_destroy (pool);
+	close (fd);
+    
+    
+    
+    
+    //3. Clear window and start rendering loop    
+	nk_wayland_surf_clear(&nk_wayland_ctx);
+    wl_surface_attach (nk_wayland_ctx.surface, nk_wayland_ctx.front_buffer, 0, 0);
+    wl_surface_commit (nk_wayland_ctx.surface);
+    
+    nk_wayland_init(&nk_wayland_ctx);
+    
+    
+    //4. rendering UI
+    while (running) {
+        started = timestamp(); 
+      
+        // GUI 
+        if (nk_begin(&(nk_wayland_ctx.ctx), "Demo", nk_rect(50, 50, 200, 200),
+            NK_WINDOW_BORDER|NK_WINDOW_MOVABLE|
+            NK_WINDOW_CLOSABLE|NK_WINDOW_MINIMIZABLE|NK_WINDOW_TITLE)) {
+            enum {EASY, HARD};
+            static int op = EASY;
+            static int property = 20;
+
+            nk_layout_row_static(&(nk_wayland_ctx.ctx), 30, 80, 1);
+            if (nk_button_label(&(nk_wayland_ctx.ctx), "button")){
+                printf("button pressed\n");
+            }
+            nk_layout_row_dynamic(&(nk_wayland_ctx.ctx), 30, 2);
+            if (nk_option_label(&(nk_wayland_ctx.ctx), "easy", op == EASY)) op = EASY;
+            if (nk_option_label(&(nk_wayland_ctx.ctx), "hard", op == HARD)) op = HARD;
+            nk_layout_row_dynamic(&(nk_wayland_ctx.ctx), 25, 1);
+            nk_property_int(&(nk_wayland_ctx.ctx), "Compression:", 0, &property, 100, 10, 1);
+        }
+        nk_end(&(nk_wayland_ctx.ctx));
+        
+        if (nk_window_is_closed(&(nk_wayland_ctx.ctx), "Demo")) break;
+
+        // -------------- EXAMPLES ---------------- 
+        //#ifdef INCLUDE_CALCULATOR
+        //  calculator(&rawfb->ctx);
+        //#endif
+       // #ifdef INCLUDE_OVERVIEW
+       //   overview(&rawfb->ctx);
+       // #endif
+       // #ifdef INCLUDE_NODE_EDITOR
+       //   node_editor(&rawfb->ctx);
+        //#endif
+        // ----------------------------------------- 
+
+        // Draw framebuffer 
+        nk_wayland_render(&nk_wayland_ctx, nk_rgb(30,30,30), 1);
+        
+        
+        //handle wayland stuff (send display to FB & get inputs)
+        nk_input_begin(&(nk_wayland_ctx.ctx));
+        wl_display_dispatch(nk_wayland_ctx.display);
+        nk_input_end(&(nk_wayland_ctx.ctx));
+        
+        // Timing 
+        dt = timestamp() - started;
+        if (dt < DTIME)
+            sleep_for(DTIME - dt);
+    }
+	
+	nk_wayland_deinit (&nk_wayland_ctx);
+	wl_display_disconnect (nk_wayland_ctx.display);
+	return 0;
+}

+ 861 - 0
demo/wayland_rawfb/nuklear_raw_wayland.h

@@ -0,0 +1,861 @@
+#ifndef NK_RAW_WAYLAND_H_
+#define NK_RAW_WAYLAND_H_
+
+#define WIDTH 800
+#define HEIGHT 600
+
+#ifndef MIN
+#define MIN(a,b) ((a) < (b) ? (a) : (b))
+#endif
+#ifndef MAX
+#define MAX(a,b) ((a) < (b) ? (b) : (a))
+#endif
+
+typedef enum wayland_pixel_layout {
+    PIXEL_LAYOUT_XRGB_8888,
+    PIXEL_LAYOUT_RGBX_8888,
+} wayland_pl;
+
+struct wayland_img {
+    void *pixels;
+    int w, h, pitch;
+    wayland_pl pl;
+    enum nk_font_atlas_format format;
+};
+
+struct nk_wayland{
+    /*wayland vars*/
+    struct wl_display *display;
+    struct wl_compositor *compositor;
+    struct wl_shell *shell;
+    struct wl_shm *wl_shm;
+    struct wl_seat* seat;
+    struct wl_callback *frame_callback;
+    struct wl_surface *surface;
+	struct wl_shell_surface *shell_surface;
+	struct wl_buffer *front_buffer;
+
+    
+    /*nuklear vars*/
+    struct nk_context ctx;
+    struct nk_rect scissors;
+    struct nk_font_atlas atlas;
+    struct wayland_img font_tex;
+	int32_t width, height;
+	int32_t *data;
+    int mouse_pointer_x;
+    int mouse_pointer_y;
+    uint8_t tex_scratch[512 * 512];
+    
+};
+
+static uint32_t nk_color_to_xrgb8888(struct nk_color col)
+{
+    return (col.a << 24) + (col.r << 16) + (col.g << 8) + col.b;
+}
+
+static struct nk_color nk_wayland_int2color(const unsigned int i, wayland_pl pl)
+{
+    struct nk_color col = {0,0,0,0};
+
+    switch (pl) {
+    case PIXEL_LAYOUT_RGBX_8888:
+        col.r = (i >> 24) & 0xff;
+        col.g = (i >> 16) & 0xff;
+        col.b = (i >> 8) & 0xff;
+        col.a = i & 0xff;
+        break;
+    case PIXEL_LAYOUT_XRGB_8888:
+        col.a = (i >> 24) & 0xff;
+        col.r = (i >> 16) & 0xff;
+        col.g = (i >> 8) & 0xff;
+        col.b = i & 0xff;
+        break;
+
+    default:
+        perror("nk_rawfb_int2color(): Unsupported pixel layout.\n");
+        break;
+    }
+    return col;
+}
+
+static unsigned int nk_wayland_color2int(const struct nk_color c, wayland_pl pl)
+{
+    unsigned int res = 0;
+
+    switch (pl) {
+    case PIXEL_LAYOUT_RGBX_8888:
+        res |= c.r << 24;
+        res |= c.g << 16;
+        res |= c.b << 8;
+        res |= c.a;
+        break;
+        
+    case PIXEL_LAYOUT_XRGB_8888:
+        res |= c.a << 24;
+        res |= c.r << 16;
+        res |= c.g << 8;
+        res |= c.b;
+        break;
+
+    default:
+        perror("nk_rawfb_color2int(): Unsupported pixel layout.\n");
+        break;
+    }
+    return (res);
+}
+
+static void nk_wayland_ctx_setpixel(const struct nk_wayland* win,
+    const short x0, const short y0, const struct nk_color col)
+{
+    uint32_t c = nk_color_to_xrgb8888(col);
+    uint32_t *pixels = win->data;
+    unsigned int *ptr;
+
+    pixels += (y0 * win->width);
+    ptr = (unsigned int *)pixels + x0;
+
+    if (y0 < win->scissors.h && y0 >= win->scissors.y && x0 >= win->scissors.x && x0 < win->scissors.w){
+        *ptr = c;
+    }else {
+        printf("out of bound! \n");
+    }
+}
+
+static void nk_wayland_fill_polygon(const struct nk_wayland* win, const struct nk_vec2i *pnts, int count, const struct nk_color col)
+{
+    int i = 0;
+    //#define MAX_POINTS 64
+    int left = 10000, top = 10000, bottom = 0, right = 0;
+    int nodes, nodeX[1024], pixelX, pixelY, j, swap ;
+
+    if (count == 0) return;
+    if (count > 1024)
+        count = 1024;
+
+    /* Get polygon dimensions */
+    for (i = 0; i < count; i++) {
+        if (left > pnts[i].x)
+            left = pnts[i].x;
+        if (right < pnts[i].x)
+            right = pnts[i].x;
+        if (top > pnts[i].y)
+            top = pnts[i].y;
+        if (bottom < pnts[i].y)
+            bottom = pnts[i].y;
+    } bottom++; right++;
+
+    /* Polygon scanline algorithm released under public-domain by Darel Rex Finley, 2007 */
+    /*  Loop through the rows of the image. */
+    for (pixelY = top; pixelY < bottom; pixelY ++) {
+        nodes = 0; /*  Build a list of nodes. */
+        j = count - 1;
+        for (i = 0; i < count; i++) {
+            if (((pnts[i].y < pixelY) && (pnts[j].y >= pixelY)) ||
+                ((pnts[j].y < pixelY) && (pnts[i].y >= pixelY))) {
+                nodeX[nodes++]= (int)((float)pnts[i].x
+                     + ((float)pixelY - (float)pnts[i].y) / ((float)pnts[j].y - (float)pnts[i].y)
+                     * ((float)pnts[j].x - (float)pnts[i].x));
+            } j = i;
+        }
+
+        /*  Sort the nodes, via a simple “Bubble” sort. */
+        i = 0;
+        while (i < nodes - 1) {
+            if (nodeX[i] > nodeX[i+1]) {
+                swap = nodeX[i];
+                nodeX[i] = nodeX[i+1];
+                nodeX[i+1] = swap;
+                if (i) i--;
+            } else i++;
+        }
+        /*  Fill the pixels between node pairs. */
+        for (i = 0; i < nodes; i += 2) {
+            if (nodeX[i+0] >= right) break;
+            if (nodeX[i+1] > left) {
+                if (nodeX[i+0] < left) nodeX[i+0] = left ;
+                if (nodeX[i+1] > right) nodeX[i+1] = right;
+                for (pixelX = nodeX[i]; pixelX < nodeX[i + 1]; pixelX++)
+                    nk_wayland_ctx_setpixel(win, pixelX, pixelY, col);
+            }
+        }
+    }
+}
+
+static void nk_wayland_fill_arc(const struct nk_wayland* win, short x0, short y0, short w, short h, const short s, const struct nk_color col)
+{
+    /* Bresenham's ellipses - modified to fill one quarter */
+    const int a2 = (w * w) / 4;
+    const int b2 = (h * h) / 4;
+    const int fa2 = 4 * a2, fb2 = 4 * b2;
+    int x, y, sigma;
+    struct nk_vec2i pnts[3];
+    if (w < 1 || h < 1) return;
+    if (s != 0 && s != 90 && s != 180 && s != 270)
+        return;
+
+    /* Convert upper left to center */
+    h = (h + 1) / 2;
+    w = (w + 1) / 2;
+    x0 += w;
+    y0 += h;
+
+    pnts[0].x = x0;
+    pnts[0].y = y0;
+    pnts[2].x = x0;
+    pnts[2].y = y0;
+
+    /* First half */
+    for (x = 0, y = h, sigma = 2*b2+a2*(1-2*h); b2*x <= a2*y; x++) {
+        if (s == 180) {
+            pnts[1].x = x0 + x; pnts[1].y = y0 + y;
+        } else if (s == 270) {
+            pnts[1].x = x0 - x; pnts[1].y = y0 + y;
+        } else if (s == 0) {
+            pnts[1].x = x0 + x; pnts[1].y = y0 - y;
+        } else if (s == 90) {
+            pnts[1].x = x0 - x; pnts[1].y = y0 - y;
+        }
+        nk_wayland_fill_polygon(win, pnts, 3, col);
+        pnts[2] = pnts[1];
+        if (sigma >= 0) {
+            sigma += fa2 * (1 - y);
+            y--;
+        } sigma += b2 * ((4 * x) + 6);
+    }
+
+    /* Second half */
+    for (x = w, y = 0, sigma = 2*a2+b2*(1-2*w); a2*y <= b2*x; y++) {
+        if (s == 180) {
+            pnts[1].x = x0 + x; pnts[1].y = y0 + y;
+        } else if (s == 270) {
+            pnts[1].x = x0 - x; pnts[1].y = y0 + y;
+        } else if (s == 0) {
+            pnts[1].x = x0 + x; pnts[1].y = y0 - y;
+        } else if (s == 90) {
+            pnts[1].x = x0 - x; pnts[1].y = y0 - y;
+        }
+        nk_wayland_fill_polygon(win, pnts, 3, col);
+        pnts[2] = pnts[1];
+        if (sigma >= 0) {
+            sigma += fb2 * (1 - x);
+            x--;
+        } sigma += a2 * ((4 * y) + 6);
+    }
+}
+
+static void nk_wayland_img_setpixel(const struct wayland_img *img, const int x0, const int y0, const struct nk_color col)
+{
+    unsigned int c = nk_wayland_color2int(col, img->pl);
+    unsigned char *ptr;
+    unsigned int *pixel;
+    NK_ASSERT(img);
+    if (y0 < img->h && y0 >= 0 && x0 >= 0 && x0 < img->w) {
+        ptr = img->pixels + (img->pitch * y0);
+	pixel = (unsigned int *)ptr;
+
+        if (img->format == NK_FONT_ATLAS_ALPHA8) {
+            ptr[x0] = col.a;
+        } else {
+	    pixel[x0] = c;
+        }
+    }
+}
+
+static struct nk_color nk_wayland_getpixel(const struct nk_wayland* win, const int x0, const int y0)
+{
+    struct nk_color col = {0, 0, 0, 0};
+    uint32_t *ptr;
+    unsigned int pixel;
+
+    if (y0 < win->height && y0 >= 0 && x0 >= 0 && x0 < win->width) {
+        ptr = win->data + (y0 * win->width);
+
+        col = nk_wayland_int2color(*ptr, PIXEL_LAYOUT_XRGB_8888);
+    } 
+    
+    return col;
+}
+
+static struct nk_color nk_wayland_img_getpixel(const struct wayland_img *img, const int x0, const int y0)
+{
+    struct nk_color col = {0, 0, 0, 0};
+    unsigned char *ptr;
+    unsigned int pixel;
+    NK_ASSERT(img);
+    if (y0 < img->h && y0 >= 0 && x0 >= 0 && x0 < img->w) {
+        ptr = img->pixels + (img->pitch * y0);
+
+        if (img->format == NK_FONT_ATLAS_ALPHA8) {
+            col.a = ptr[x0];
+            col.b = col.g = col.r = 0xff;
+        } else {
+            pixel = ((unsigned int *)ptr)[x0];
+            col = nk_wayland_int2color(pixel, img->pl);
+        }
+    } return col;
+}
+
+static void nk_wayland_blendpixel(const struct nk_wayland* win, const int x0, const int y0, struct nk_color col)
+{
+    struct nk_color col2;
+    unsigned char inv_a;
+    if (col.a == 0)
+        return;
+
+    inv_a = 0xff - col.a;
+    col2 = nk_wayland_getpixel(win, x0, y0);
+    col.r = (col.r * col.a + col2.r * inv_a) >> 8;
+    col.g = (col.g * col.a + col2.g * inv_a) >> 8;
+    col.b = (col.b * col.a + col2.b * inv_a) >> 8;
+    nk_wayland_ctx_setpixel(win, x0, y0, col);
+}
+
+static void nk_wayland_img_blendpixel(const struct wayland_img *img, const int x0, const int y0, struct nk_color col)
+{
+    struct nk_color col2;
+    unsigned char inv_a;
+    if (col.a == 0)
+        return;
+
+    inv_a = 0xff - col.a;
+    col2 = nk_wayland_img_getpixel(img, x0, y0);
+    col.r = (col.r * col.a + col2.r * inv_a) >> 8;
+    col.g = (col.g * col.a + col2.g * inv_a) >> 8;
+    col.b = (col.b * col.a + col2.b * inv_a) >> 8;
+    nk_wayland_img_setpixel(img, x0, y0, col);
+}
+
+static void nk_wayland_line_horizontal(const struct nk_wayland* win, const short x0, const short y, const short x1, const struct nk_color col)
+{
+    /* This function is called the most. Try to optimize it a bit...
+     * It does not check for scissors or image borders.
+     * The caller has to make sure it does no exceed bounds. */
+    unsigned int i, n;
+    unsigned int c[16];
+    unsigned char *pixels = (uint8_t*)win->data;
+    unsigned int *ptr;
+
+    pixels += (y * (win->width * 4));
+    ptr = (unsigned int *)pixels + x0;
+
+    n = x1 - x0;
+    for (i = 0; i < sizeof(c) / sizeof(c[0]); i++)
+        c[i] = nk_color_to_xrgb8888(col);
+
+    while (n > 16) {
+        memcpy((void *)ptr, c, sizeof(c));
+        n -= 16; ptr += 16;
+    } for (i = 0; i < n; i++)
+        ptr[i] = c[i];
+}
+
+
+static void nk_wayland_scissor(struct nk_wayland* win, const float x, const float y, const float w, const float h)
+{
+    win->scissors.x = MIN(MAX(x, 0), WIDTH);
+    win->scissors.y = MIN(MAX(y, 0), HEIGHT);
+    win->scissors.w = MIN(MAX(w + x, 0), WIDTH);
+    win->scissors.h = MIN(MAX(h + y, 0), HEIGHT);
+}
+
+static void nk_wayland_stroke_line(const struct nk_wayland* win, short x0, short y0, short x1, short y1, const unsigned int line_thickness, const struct nk_color col)
+{
+    short tmp;
+    int dy, dx, stepx, stepy;
+
+    dy = y1 - y0;
+    dx = x1 - x0;
+    
+    //printf("\n\n\n\n");
+    // fast path
+    if (dy == 0) {
+        if (dx == 0 || y0 >= win->scissors.h || y0 < win->scissors.y){
+            return;
+        }
+
+        if (dx < 0) {
+            // swap x0 and x1
+            tmp = x1;
+            x1 = x0;
+            x0 = tmp;
+        }
+        x1 = MIN(win->scissors.w, x1);
+        x0 = MIN(win->scissors.w, x0);
+        x1 = MAX(win->scissors.x, x1);
+        x0 = MAX(win->scissors.x, x0);
+        nk_wayland_line_horizontal(win, x0, y0, x1, col);
+        return;
+    }
+    if (dy < 0) {
+        dy = -dy;
+        stepy = -1;
+    } else stepy = 1;
+
+    if (dx < 0) {
+        dx = -dx;
+        stepx = -1;
+    } else stepx = 1;
+
+    dy <<= 1;
+    dx <<= 1;
+
+    nk_wayland_ctx_setpixel(win, x0, y0, col);
+    if (dx > dy) {
+        int fraction = dy - (dx >> 1);
+        while (x0 != x1) {
+            if (fraction >= 0) {
+                y0 += stepy;
+                fraction -= dx;
+            }
+            x0 += stepx;
+            fraction += dy;
+            nk_wayland_ctx_setpixel(win, x0, y0, col);
+        }
+    } else {
+        int fraction = dx - (dy >> 1);
+        while (y0 != y1) {
+            if (fraction >= 0) {
+                x0 += stepx;
+                fraction -= dy;
+            }
+            y0 += stepy;
+            fraction += dx;
+            nk_wayland_ctx_setpixel(win, x0, y0, col);
+        }
+    }
+}
+
+static void
+nk_wayland_fill_rect(const struct nk_wayland* win,
+    const short x, const short y, const short w, const short h,
+    const short r, const struct nk_color col)
+{
+    int i;
+    if (r == 0) {
+        for (i = 0; i < h; i++)
+            nk_wayland_stroke_line(win, x, y + i, x + w, y + i, 1, col);
+    } else {
+        const short xc = x + r;
+        const short yc = y + r;
+        const short wc = (short)(w - 2 * r);
+        const short hc = (short)(h - 2 * r);
+
+        struct nk_vec2i pnts[12];
+        pnts[0].x = x;
+        pnts[0].y = yc;
+        pnts[1].x = xc;
+        pnts[1].y = yc;
+        pnts[2].x = xc;
+        pnts[2].y = y;
+
+        pnts[3].x = xc + wc;
+        pnts[3].y = y;
+        pnts[4].x = xc + wc;
+        pnts[4].y = yc;
+        pnts[5].x = x + w;
+        pnts[5].y = yc;
+
+        pnts[6].x = x + w;
+        pnts[6].y = yc + hc;
+        pnts[7].x = xc + wc;
+        pnts[7].y = yc + hc;
+        pnts[8].x = xc + wc;
+        pnts[8].y = y + h;
+
+        pnts[9].x = xc;
+        pnts[9].y = y + h;
+        pnts[10].x = xc;
+        pnts[10].y = yc + hc;
+        pnts[11].x = x;
+        pnts[11].y = yc + hc;
+
+        nk_wayland_fill_polygon(win, pnts, 12, col);
+
+        nk_wayland_fill_arc(win, xc + wc - r, y,
+                (unsigned)r*2, (unsigned)r*2, 0 , col);
+        nk_wayland_fill_arc(win, x, y,
+                (unsigned)r*2, (unsigned)r*2, 90 , col);
+        nk_wayland_fill_arc(win, x, yc + hc - r,
+                (unsigned)r*2, (unsigned)r*2, 270 , col);
+        nk_wayland_fill_arc(win, xc + wc - r, yc + hc - r,
+                (unsigned)r*2, (unsigned)r*2, 180 , col);
+    }
+}
+
+static void nk_wayland_stroke_arc(const struct nk_wayland* win,
+    short x0, short y0, short w, short h, const short s,
+    const short line_thickness, const struct nk_color col)
+{
+    /* Bresenham's ellipses - modified to draw one quarter */
+    const int a2 = (w * w) / 4;
+    const int b2 = (h * h) / 4;
+    const int fa2 = 4 * a2, fb2 = 4 * b2;
+    int x, y, sigma;
+
+    if (s != 0 && s != 90 && s != 180 && s != 270) return;
+    if (w < 1 || h < 1) return;
+
+    /* Convert upper left to center */
+    h = (h + 1) / 2;
+    w = (w + 1) / 2;
+    x0 += w; y0 += h;
+
+    /* First half */
+    for (x = 0, y = h, sigma = 2*b2+a2*(1-2*h); b2*x <= a2*y; x++) {
+        if (s == 180)
+            nk_wayland_ctx_setpixel(win, x0 + x, y0 + y, col);
+        else if (s == 270)
+            nk_wayland_ctx_setpixel(win, x0 - x, y0 + y, col);
+        else if (s == 0)
+            nk_wayland_ctx_setpixel(win, x0 + x, y0 - y, col);
+        else if (s == 90)
+            nk_wayland_ctx_setpixel(win, x0 - x, y0 - y, col);
+        if (sigma >= 0) {
+            sigma += fa2 * (1 - y);
+            y--;
+        } sigma += b2 * ((4 * x) + 6);
+    }
+
+    /* Second half */
+    for (x = w, y = 0, sigma = 2*a2+b2*(1-2*w); a2*y <= b2*x; y++) {
+        if (s == 180)
+            nk_wayland_ctx_setpixel(win, x0 + x, y0 + y, col);
+        else if (s == 270)
+            nk_wayland_ctx_setpixel(win, x0 - x, y0 + y, col);
+        else if (s == 0)
+            nk_wayland_ctx_setpixel(win, x0 + x, y0 - y, col);
+        else if (s == 90)
+            nk_wayland_ctx_setpixel(win, x0 - x, y0 - y, col);
+        if (sigma >= 0) {
+            sigma += fb2 * (1 - x);
+            x--;
+        } sigma += a2 * ((4 * y) + 6);
+    }
+}
+
+
+
+
+static void nk_wayland_stroke_rect(const struct nk_wayland* win,
+    const short x, const short y, const short w, const short h,
+    const short r, const short line_thickness, const struct nk_color col)
+{
+    if (r == 0) {
+        nk_wayland_stroke_line(win, x, y, x + w, y, line_thickness, col);
+        nk_wayland_stroke_line(win, x, y + h, x + w, y + h, line_thickness, col);
+        nk_wayland_stroke_line(win, x, y, x, y + h, line_thickness, col);
+        nk_wayland_stroke_line(win, x + w, y, x + w, y + h, line_thickness, col);
+    } else {
+        const short xc = x + r;
+        const short yc = y + r;
+        const short wc = (short)(w - 2 * r);
+        const short hc = (short)(h - 2 * r);
+
+        nk_wayland_stroke_line(win, xc, y, xc + wc, y, line_thickness, col);
+        nk_wayland_stroke_line(win, x + w, yc, x + w, yc + hc, line_thickness, col);
+        nk_wayland_stroke_line(win, xc, y + h, xc + wc, y + h, line_thickness, col);
+        nk_wayland_stroke_line(win, x, yc, x, yc + hc, line_thickness, col);
+
+        nk_wayland_stroke_arc(win, xc + wc - r, y,
+                (unsigned)r*2, (unsigned)r*2, 0 , line_thickness, col);
+        nk_wayland_stroke_arc(win, x, y,
+                (unsigned)r*2, (unsigned)r*2, 90 , line_thickness, col);
+        nk_wayland_stroke_arc(win, x, yc + hc - r,
+                (unsigned)r*2, (unsigned)r*2, 270 , line_thickness, col);
+        nk_wayland_stroke_arc(win, xc + wc - r, yc + hc - r,
+                (unsigned)r*2, (unsigned)r*2, 180 , line_thickness, col);
+    }
+}
+
+static void nk_wayland_fill_triangle(const struct nk_wayland *win,
+    const short x0, const short y0, const short x1, const short y1,
+    const short x2, const short y2, const struct nk_color col)
+{
+    struct nk_vec2i pnts[3];
+    pnts[0].x = x0;
+    pnts[0].y = y0;
+    pnts[1].x = x1;
+    pnts[1].y = y1;
+    pnts[2].x = x2;
+    pnts[2].y = y2;
+    nk_wayland_fill_polygon(win, pnts, 3, col);
+}
+
+static void nk_wayland_clear(const struct nk_wayland *win, const struct nk_color col)
+{
+    nk_wayland_fill_rect(win, 0, 0, win->width, win->height, 0, col);
+}
+
+static void nk_wayland_fill_circle(struct nk_wayland* win, short x0, short y0, short w, short h, const struct nk_color col)
+{
+    /* Bresenham's ellipses */
+    const int a2 = (w * w) / 4;
+    const int b2 = (h * h) / 4;
+    const int fa2 = 4 * a2, fb2 = 4 * b2;
+    int x, y, sigma;
+
+    /* Convert upper left to center */
+    h = (h + 1) / 2;
+    w = (w + 1) / 2;
+    x0 += w;
+    y0 += h;
+
+    /* First half */
+    for (x = 0, y = h, sigma = 2*b2+a2*(1-2*h); b2*x <= a2*y; x++) {
+        nk_wayland_stroke_line(win, x0 - x, y0 + y, x0 + x, y0 + y, 1, col);
+        nk_wayland_stroke_line(win, x0 - x, y0 - y, x0 + x, y0 - y, 1, col);
+        if (sigma >= 0) {
+            sigma += fa2 * (1 - y);
+            y--;
+        } sigma += b2 * ((4 * x) + 6);
+    }
+    /* Second half */
+    for (x = w, y = 0, sigma = 2*a2+b2*(1-2*w); a2*y <= b2*x; y++) {
+        nk_wayland_stroke_line(win, x0 - x, y0 + y, x0 + x, y0 + y, 1, col);
+        nk_wayland_stroke_line(win, x0 - x, y0 - y, x0 + x, y0 - y, 1, col);
+        if (sigma >= 0) {
+            sigma += fb2 * (1 - x);
+            x--;
+        } sigma += a2 * ((4 * y) + 6);
+    }
+}
+/**
+ * Copy wayland_img into nk_wayland with scissor & stretch
+ */ 
+static void nk_wayland_copy_image(const struct nk_wayland *win, const struct wayland_img *src, 
+    const struct nk_rect *dst_rect,
+    const struct nk_rect *src_rect, 
+    const struct nk_rect *dst_scissors,
+    const struct nk_color *fg)
+{
+    short i, j;
+    struct nk_color col;
+    float xinc = src_rect->w / dst_rect->w;
+    float yinc = src_rect->h / dst_rect->h;
+    float xoff = src_rect->x, yoff = src_rect->y;
+
+    // Simple nearest filtering rescaling 
+    // TODO: use bilinear filter 
+    for (j = 0; j < (short)dst_rect->h; j++) {
+        for (i = 0; i < (short)dst_rect->w; i++) {
+            if (dst_scissors) {
+                if (i + (int)(dst_rect->x + 0.5f) < dst_scissors->x || i + (int)(dst_rect->x + 0.5f) >= dst_scissors->w)
+                    continue;
+                if (j + (int)(dst_rect->y + 0.5f) < dst_scissors->y || j + (int)(dst_rect->y + 0.5f) >= dst_scissors->h)
+                    continue;
+            }
+            col = nk_wayland_img_getpixel(src, (int)xoff, (int) yoff);
+	    if (col.r || col.g || col.b)
+	    {
+		col.r = fg->r;
+		col.g = fg->g;
+		col.b = fg->b;
+	    }
+            nk_wayland_blendpixel(win, i + (int)(dst_rect->x + 0.5f), j + (int)(dst_rect->y + 0.5f), col);
+            xoff += xinc;
+        }
+        xoff = src_rect->x;
+        yoff += yinc;
+    }
+}
+
+static void nk_wayland_font_query_font_glyph(nk_handle handle, const float height, struct nk_user_font_glyph *glyph, const nk_rune codepoint, const nk_rune next_codepoint)
+{
+    float scale;
+    const struct nk_font_glyph *g;
+    struct nk_font *font;
+    NK_ASSERT(glyph);
+    NK_UNUSED(next_codepoint);
+
+    font = (struct nk_font*)handle.ptr;
+    NK_ASSERT(font);
+    NK_ASSERT(font->glyphs);
+    if (!font || !glyph)
+        return;
+
+    scale = height/font->info.height;
+    g = nk_font_find_glyph(font, codepoint);
+    glyph->width = (g->x1 - g->x0) * scale;
+    glyph->height = (g->y1 - g->y0) * scale;
+    glyph->offset = nk_vec2(g->x0 * scale, g->y0 * scale);
+    glyph->xadvance = (g->xadvance * scale);
+    glyph->uv[0] = nk_vec2(g->u0, g->v0);
+    glyph->uv[1] = nk_vec2(g->u1, g->v1);
+}
+
+void nk_wayland_draw_text(const struct nk_wayland *win, const struct nk_user_font *font, const struct nk_rect rect, const char *text, const int len, const float font_height, const struct nk_color fg)
+{
+    float x = 0;
+    int text_len = 0;
+    nk_rune unicode = 0;
+    nk_rune next = 0;
+    int glyph_len = 0;
+    int next_glyph_len = 0;
+    struct nk_user_font_glyph g;
+    if (!len || !text) return;
+
+    x = 0;
+    glyph_len = nk_utf_decode(text, &unicode, len);
+    if (!glyph_len) return;
+
+    // draw every glyph image 
+    while (text_len < len && glyph_len) {
+        struct nk_rect src_rect;
+        struct nk_rect dst_rect;
+        float char_width = 0;
+        if (unicode == NK_UTF_INVALID) break;
+
+        // query currently drawn glyph information 
+        next_glyph_len = nk_utf_decode(text + text_len + glyph_len, &next, (int)len - text_len);
+        nk_wayland_font_query_font_glyph(font->userdata, font_height, &g, unicode,
+                    (next == NK_UTF_INVALID) ? '\0' : next);
+
+        //calculate and draw glyph drawing rectangle and image 
+        char_width = g.xadvance;
+        src_rect.x = g.uv[0].x * win->font_tex.w;
+        src_rect.y = g.uv[0].y * win->font_tex.h;
+        src_rect.w = g.uv[1].x * win->font_tex.w - g.uv[0].x * win->font_tex.w;
+        src_rect.h = g.uv[1].y * win->font_tex.h - g.uv[0].y * win->font_tex.h;
+
+        dst_rect.x = x + g.offset.x + rect.x;
+        dst_rect.y = g.offset.y + rect.y;
+        dst_rect.w = ceilf(g.width);
+        dst_rect.h = ceilf(g.height);
+
+        // Use software rescaling to blit glyph from font_text to framebuffer 
+        nk_wayland_copy_image(win, &(win->font_tex), &dst_rect, &src_rect, &(win->scissors), &fg);
+
+        // offset next glyph 
+        text_len += glyph_len;
+        x += char_width;
+        glyph_len = next_glyph_len;
+        unicode = next;
+    }
+}
+
+static void nk_wayland_render(struct nk_wayland *win, const struct nk_color clear, const unsigned char enable_clear)
+{
+    const struct nk_command *cmd;
+    const struct nk_command_text *tx;
+    const struct nk_command_scissor *s;
+    const struct nk_command_rect_filled *rf;
+    const struct nk_command_rect *r;
+    const struct nk_command_circle_filled *c;
+    const struct nk_command_triangle_filled *t;
+    const struct nk_command_line *l;
+    const struct nk_command_polygon_filled *p;
+    
+    if (enable_clear)
+        nk_wayland_clear(win, clear);
+
+    nk_foreach(cmd, (struct nk_context*)&(win->ctx)) {
+        switch (cmd->type) {
+        case NK_COMMAND_NOP: 
+            //printf("NK_COMMAND_NOP \n");
+            break;
+            
+        case NK_COMMAND_SCISSOR:
+            s = (const struct nk_command_scissor*)cmd;
+            nk_wayland_scissor(win, s->x, s->y, s->w, s->h);
+            break;
+            
+        case NK_COMMAND_LINE:
+            l = (const struct nk_command_line *)cmd;
+            nk_wayland_stroke_line(win, l->begin.x, l->begin.y, l->end.x, l->end.y, l->line_thickness, l->color);
+            break;
+            
+        case NK_COMMAND_RECT:
+            r = (const struct nk_command_rect *)cmd;
+            nk_wayland_stroke_rect(win, r->x, r->y, r->w, r->h, (unsigned short)r->rounding, r->line_thickness, r->color);
+            break;
+        
+        case NK_COMMAND_RECT_FILLED:
+            rf = (const struct nk_command_rect_filled *)cmd;
+            nk_wayland_fill_rect(win, rf->x, rf->y, rf->w, rf->h, (unsigned short)rf->rounding, rf->color);
+            break;
+            
+        case NK_COMMAND_CIRCLE:
+          //  printf("NK_COMMAND_CIRCLE \n");
+            //const struct nk_command_circle *c = (const struct nk_command_circle *)cmd;
+            //nk_rawfb_stroke_circle(rawfb, c->x, c->y, c->w, c->h, c->line_thickness, c->color);
+            break;
+            
+        case NK_COMMAND_CIRCLE_FILLED:
+            c = (const struct nk_command_circle_filled *)cmd;
+            nk_wayland_fill_circle(win, c->x, c->y, c->w, c->h, c->color);
+            
+            //const struct nk_command_circle_filled *c = (const struct nk_command_circle_filled *)cmd;
+            //nk_rawfb_fill_circle(rawfb, c->x, c->y, c->w, c->h, c->color);
+            break;
+        
+        case NK_COMMAND_TRIANGLE:
+            //printf("NK_COMMAND_TRIANGLE \n");
+            //const struct nk_command_triangle*t = (const struct nk_command_triangle*)cmd;
+            //nk_rawfb_stroke_triangle(rawfb, t->a.x, t->a.y, t->b.x, t->b.y, t->c.x, t->c.y, t->line_thickness, t->color);
+            break;
+            
+        case NK_COMMAND_TRIANGLE_FILLED:
+            t = (const struct nk_command_triangle_filled *)cmd;
+            nk_wayland_fill_triangle(win, t->a.x, t->a.y, t->b.x, t->b.y, t->c.x, t->c.y, t->color);
+            break;
+        
+        case NK_COMMAND_POLYGON:
+          //  printf("NK_COMMAND_POLYGON \n");
+            //const struct nk_command_polygon *p =(const struct nk_command_polygon*)cmd;
+            //nk_rawfb_stroke_polygon(rawfb, p->points, p->point_count, p->line_thickness,p->color);
+            break;
+        
+        case NK_COMMAND_POLYGON_FILLED:
+           // printf("NK_COMMAND_POLYGON_FILLED \n");
+            p = (const struct nk_command_polygon_filled *)cmd;
+            nk_wayland_fill_polygon(win, p->points, p->point_count, p->color);
+            break;
+        
+        case NK_COMMAND_POLYLINE:
+           // printf("NK_COMMAND_POLYLINE \n");
+            //const struct nk_command_polyline *p = (const struct nk_command_polyline *)cmd;
+            //nk_rawfb_stroke_polyline(rawfb, p->points, p->point_count, p->line_thickness, p->color);
+            break;
+        
+        case NK_COMMAND_TEXT:
+            tx = (const struct nk_command_text*)cmd;
+            nk_wayland_draw_text(win, tx->font, nk_rect(tx->x, tx->y, tx->w, tx->h), tx->string, tx->length, tx->height, tx->foreground);
+            break;
+        
+        case NK_COMMAND_CURVE:
+         //    printf("NK_COMMAND_CURVE \n");
+            //const struct nk_command_curve *q = (const struct nk_command_curve *)cmd;
+            //nk_rawfb_stroke_curve(rawfb, q->begin, q->ctrl[0], q->ctrl[1], q->end, 22, q->line_thickness, q->color);
+            break;
+        
+        case NK_COMMAND_RECT_MULTI_COLOR:
+          //  printf("NK_COMMAND_RECT_MULTI_COLOR \n");
+            //const struct nk_command_rect_multi_color *q = (const struct nk_command_rect_multi_color *)cmd;
+            //nk_rawfb_draw_rect_multi_color(rawfb, q->x, q->y, q->w, q->h, q->left, q->top, q->right, q->bottom);
+            break;
+            
+        case NK_COMMAND_IMAGE:
+            //printf("NK_COMMAND_IMAGE \n");
+           // const struct nk_command_image *q = (const struct nk_command_image *)cmd;
+           // nk_rawfb_drawimage(rawfb, q->x, q->y, q->w, q->h, &q->img, &q->col);
+            break;
+        
+        case NK_COMMAND_ARC:
+            printf("NK_COMMAND_ARC \n");
+            assert(0 && "NK_COMMAND_ARC not implemented\n");
+            break;
+            
+        case NK_COMMAND_ARC_FILLED:
+            printf("NK_COMMAND_ARC \n");
+            assert(0 && "NK_COMMAND_ARC_FILLED not implemented\n");
+            break;
+        
+        default: 
+            printf("unhandled OP: %d \n", cmd->type);
+            break;
+        }
+    } nk_clear(&(win->ctx));
+}
+
+#endif