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Added initial work for allegro5 backend

This commit is contained in:
seibelj 2016-12-31 01:29:45 -05:00
parent 9b7a28038a
commit e2c48555d4
3 changed files with 621 additions and 0 deletions
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24
demo/allegro5/Makefile Normal file
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# Install
BIN = demo
# Flags
CFLAGS = -std=c99 -pedantic -O2
# DEBUG
#CFLAGS = -std=c99 -pedantic -O0 -g
SRC = main.c
OBJ = $(SRC:.c=.o)
# TODO: Handle Windows build
#ifeq ($(OS),Windows_NT)
#BIN := $(BIN).exe
#LIBS = -lglfw3 -lopengl32 -lm -lGLU32 -lGLEW32
#else
LIBS = -lallegro -lallegro_main -lallegro_image -lallegro_font \
-lallegro_ttf -lallegro_primitives -lm
#endif
$(BIN):
@mkdir -p bin
rm -f bin/$(BIN) $(OBJS)
$(CC) $(SRC) $(CFLAGS) -o bin/$(BIN) $(LIBS)

178
demo/allegro5/main.c Normal file
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/* nuklear - v1.17 - 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 <allegro5/allegro.h>
#define WINDOW_WIDTH 1200
#define WINDOW_HEIGHT 800
#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_ALLEGRO5_IMPLEMENTATION
#include "../../nuklear.h"
#include "nuklear_allegro5.h"
#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
*
* ===============================================================*/
static void error_callback(int e, const char *d)
{printf("Error %d: %s\n", e, d);}
int main(void)
{
/* Platform */
ALLEGRO_DISPLAY *display = NULL;
ALLEGRO_EVENT_QUEUE *event_queue = NULL;
if (!al_init()) {
fprintf(stdout, "failed to initialize allegro5!\n");
exit(1);
}
al_install_mouse();
al_install_keyboard();
al_set_new_display_flags(ALLEGRO_WINDOWED|ALLEGRO_RESIZABLE|ALLEGRO_OPENGL);
al_set_new_display_option(ALLEGRO_SAMPLE_BUFFERS, 1, ALLEGRO_SUGGEST);
al_set_new_display_option(ALLEGRO_SAMPLES, 8, ALLEGRO_SUGGEST);
display = al_create_display(WINDOW_WIDTH, WINDOW_HEIGHT);
if (!display) {
fprintf(stdout, "failed to create display!\n");
exit(1);
}
event_queue = al_create_event_queue();
if (!event_queue) {
fprintf(stdout, "failed to create event_queue!\n");
al_destroy_display(display);
exit(1);
}
al_register_event_source(event_queue, al_get_display_event_source(display));
al_register_event_source(event_queue, al_get_mouse_event_source());
al_register_event_source(event_queue, al_get_keyboard_event_source());
NkAllegro5Font *font;
font = nk_allegro5_font_create_from_file("../../extra_font/DroidSans.ttf", 12, 0);
struct nk_context *ctx;
struct nk_color background;
ctx = nk_allegro5_init(font, display, WINDOW_WIDTH, WINDOW_HEIGHT);
/* 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 *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_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(1)
{
ALLEGRO_EVENT ev;
ALLEGRO_TIMEOUT timeout;
al_init_timeout(&timeout, 0.06);
bool get_event = al_wait_for_event_until(event_queue, &ev, &timeout);
if (get_event && ev.type == ALLEGRO_EVENT_DISPLAY_CLOSE) {
break;
}
if (get_event) {
nk_input_begin(ctx);
while (get_event) {
nk_allegro5_handle_event(&ev);
get_event = al_get_next_event(event_queue, &ev);
}
nk_input_end(ctx);
}
/* GUI */
if (nk_begin(ctx, "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"))
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, 22, 1);
nk_property_int(ctx, "Compression:", 0, &property, 100, 10, 1);
}
nk_end(ctx);
/* -------------- EXAMPLES ---------------- */
/*calculator(ctx);*/
overview(ctx);
/*node_editor(ctx);*/
/* ----------------------------------------- */
/* Draw */
//al_reset_clipping_rectangle();
al_clear_to_color(al_map_rgb(19, 43, 81));
/* IMPORTANT: `nk_allegro5_render` changes the target backbuffer
to the display set at initialization and does not restore it.
Change it if you want to draw somewhere else. */
nk_allegro5_render();
al_flip_display();
}
nk_allegro5_font_del(font);
nk_allegro5_shutdown();
al_destroy_display(display);
al_destroy_event_queue(event_queue);
return 0;
}

419
demo/allegro5/nuklear_allegro5.h Normal file
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/*
* Nuklear - v1.17 - public domain
* no warrenty implied; use at your own risk.
* authored from 2015-2016 by Micha Mettke
*/
/*
* ==============================================================
*
* API
*
* ===============================================================
*/
#ifndef NK_ALLEGRO5_H_
#define NK_ALLEGRO5_H_
#include <allegro5/allegro.h>
#include <allegro5/allegro_image.h>
#include <allegro5/allegro_primitives.h>
#include <allegro5/allegro_font.h>
#include <allegro5/allegro_ttf.h>
typedef struct NkAllegro5Font NkAllegro5Font;
NK_API struct nk_context* nk_allegro5_init(NkAllegro5Font *font, ALLEGRO_DISPLAY *dsp, unsigned int width, unsigned int height);
NK_API void nk_allegro5_handle_event(ALLEGRO_EVENT *ev);
NK_API void nk_allegro5_shutdown(void);
NK_API void nk_allegro5_render(void);
// Fonts. We wrap normal allegro fonts in some nuklear book keeping
NK_API NkAllegro5Font* nk_allegro5_font_create_from_file(const char *file_name, int font_size, int flags);
NK_API void nk_allegro5_font_del(NkAllegro5Font *font);
NK_API void nk_allegro5_font_set_font(NkAllegro5Font *font);
//NK_API void nk_glfw3_char_callback(GLFWwindow *win, unsigned int codepoint);
//NK_API void nk_gflw3_scroll_callback(GLFWwindow *win, double xoff, double yoff);
#endif
/*
* ==============================================================
*
* IMPLEMENTATION
*
* ===============================================================
*/
#ifdef NK_ALLEGRO5_IMPLEMENTATION
#ifndef NK_ALLEGRO5_TEXT_MAX
#define NK_ALLEGRO5_TEXT_MAX 256
#endif
struct NkAllegro5Font {
struct nk_user_font nk;
int height;
ALLEGRO_FONT *font;
};
static struct nk_allegro5 {
ALLEGRO_DISPLAY *dsp;
unsigned int width;
unsigned int height;
struct nk_context ctx;
struct nk_buffer cmds;
} allegro5;
// Flags are identical to al_load_font() flags argument
NK_API NkAllegro5Font*
nk_allegro5_font_create_from_file(const char *file_name, int font_size, int flags)
{
if (!al_init_image_addon()) {
fprintf(stdout, "Unable to initialize required allegro5 image addon\n");
exit(1);
}
if (!al_init_font_addon()) {
fprintf(stdout, "Unable to initialize required allegro5 font addon\n");
exit(1);
}
if (!al_init_ttf_addon()) {
fprintf(stdout, "Unable to initialize required allegro5 TTF font addon\n");
exit(1);
}
NkAllegro5Font *font = (NkAllegro5Font*)calloc(1, sizeof(NkAllegro5Font));
font->font = al_load_font(file_name, font_size, flags);
if (font->font == NULL) {
fprintf(stdout, "Unable to load font file: %s\n", file_name);
return NULL;
}
font->height = al_get_font_line_height(font->font);
return font;
}
static float
nk_allegro5_font_get_text_width(nk_handle handle, float height, const char *text, int len)
{
NkAllegro5Font *font = (NkAllegro5Font*)handle.ptr;
if (!font || !text) {
return 0;
}
return (float)al_get_text_width(font->font, text);
}
NK_API void
nk_allegro5_font_set_font(NkAllegro5Font *allegro5font)
{
struct nk_user_font *font = &allegro5font->nk;
font->userdata = nk_handle_ptr(allegro5font);
font->height = (float)allegro5font->height;
font->width = nk_allegro5_font_get_text_width;
nk_style_set_font(&allegro5.ctx, font);
}
NK_API void
nk_allegro5_font_del(NkAllegro5Font *font)
{
if(!font) return;
al_destroy_font(font->font);
free(font);
}
static ALLEGRO_COLOR
nk_color_to_allegro_color(struct nk_color color)
{
return al_map_rgba((unsigned char)color.r, (unsigned char)color.g,
(unsigned char)color.b, (unsigned char)color.a);
}
NK_API void
nk_allegro5_render()
{
const struct nk_command *cmd;
al_set_target_backbuffer(allegro5.dsp);
nk_foreach(cmd, &allegro5.ctx)
{
ALLEGRO_COLOR color;
switch (cmd->type) {
case NK_COMMAND_NOP: break;
case NK_COMMAND_SCISSOR: {
const struct nk_command_scissor *s =(const struct nk_command_scissor*)cmd;
al_set_clipping_rectangle((int)s->x, (int)s->y, (int)s->w, (int)s->h);
} break;
case NK_COMMAND_LINE: {
const struct nk_command_line *l = (const struct nk_command_line *)cmd;
color = nk_color_to_allegro_color(l->color);
al_draw_line((float)l->begin.x, (float)l->begin.y, (float)l->end.x,
(float)l->end.y, color, (float)l->line_thickness);
} break;
case NK_COMMAND_RECT: {
const struct nk_command_rect *r = (const struct nk_command_rect *)cmd;
color = nk_color_to_allegro_color(r->color);
al_draw_rounded_rectangle((float)r->x, (float)r->y, (float)(r->x + r->w),
(float)(r->y + r->h), (float)r->rounding, (float)r->rounding, color,
(float)r->line_thickness);
} break;
case NK_COMMAND_RECT_FILLED: {
const struct nk_command_rect_filled *r = (const struct nk_command_rect_filled *)cmd;
color = nk_color_to_allegro_color(r->color);
al_draw_filled_rounded_rectangle((float)r->x, (float)r->y,
(float)(r->x + r->w), (float)(r->y + r->h), (float)r->rounding,
(float)r->rounding, color);
} break;
case NK_COMMAND_CIRCLE: {
const struct nk_command_circle *c = (const struct nk_command_circle *)cmd;
color = nk_color_to_allegro_color(c->color);
float xr, yr;
xr = (float)c->w/2;
yr = (float)c->h/2;
al_draw_ellipse(((float)(c->x)) + xr, ((float)c->y) + yr,
xr, yr, color, (float)c->line_thickness);
} break;
case NK_COMMAND_CIRCLE_FILLED: {
const struct nk_command_circle_filled *c = (const struct nk_command_circle_filled *)cmd;
color = nk_color_to_allegro_color(c->color);
float xr, yr;
xr = (float)c->w/2;
yr = (float)c->h/2;
al_draw_filled_ellipse(((float)(c->x)) + xr, ((float)c->y) + yr,
xr, yr, color);
} break;
case NK_COMMAND_TRIANGLE: {
const struct nk_command_triangle*t = (const struct nk_command_triangle*)cmd;
color = nk_color_to_allegro_color(t->color);
al_draw_triangle((float)t->a.x, (float)t->a.y, (float)t->b.x, (float)t->b.y,
(float)t->c.x, (float)t->c.y, color, (float)t->line_thickness);
} break;
case NK_COMMAND_TRIANGLE_FILLED: {
const struct nk_command_triangle_filled *t = (const struct nk_command_triangle_filled *)cmd;
color = nk_color_to_allegro_color(t->color);
al_draw_filled_triangle((float)t->a.x, (float)t->a.y, (float)t->b.x,
(float)t->b.y, (float)t->c.x, (float)t->c.y, color);
} break;
case NK_COMMAND_POLYGON: {
const struct nk_command_polygon *p = (const struct nk_command_polygon*)cmd;
color = nk_color_to_allegro_color(p->color);
int i;
float vertices[p->point_count * 2];
for (i = 0; i < p->point_count; i++) {
vertices[i*2] = p->points[i].x;
vertices[(i*2) + 1] = p->points[i].y;
}
al_draw_polyline((const float*)&vertices, (2 * sizeof(float)),
(int)p->point_count, ALLEGRO_LINE_JOIN_ROUND, ALLEGRO_LINE_CAP_CLOSED,
color, (float)p->line_thickness, 0.0);
} break;
case NK_COMMAND_POLYGON_FILLED: {
const struct nk_command_polygon_filled *p = (const struct nk_command_polygon_filled *)cmd;
color = nk_color_to_allegro_color(p->color);
int i;
float vertices[p->point_count * 2];
for (i = 0; i < p->point_count; i++) {
vertices[i*2] = p->points[i].x;
vertices[(i*2) + 1] = p->points[i].y;
}
al_draw_filled_polygon((const float*)&vertices, (int)p->point_count, color);
} break;
case NK_COMMAND_POLYLINE: {
const struct nk_command_polyline *p = (const struct nk_command_polyline *)cmd;
color = nk_color_to_allegro_color(p->color);
int i;
float vertices[p->point_count * 2];
for (i = 0; i < p->point_count; i++) {
vertices[i*2] = p->points[i].x;
vertices[(i*2) + 1] = p->points[i].y;
}
al_draw_polyline((const float*)&vertices, (2 * sizeof(float)),
(int)p->point_count, ALLEGRO_LINE_JOIN_ROUND, ALLEGRO_LINE_CAP_ROUND,
color, (float)p->line_thickness, 0.0);
} break;
case NK_COMMAND_TEXT: {
const struct nk_command_text *t = (const struct nk_command_text*)cmd;
color = nk_color_to_allegro_color(t->foreground);
NkAllegro5Font *font = (NkAllegro5Font*)t->font->userdata.ptr;
al_draw_text(font->font,
color, (float)t->x, (float)t->y, 0,
(const char*)t->string);
} break;
case NK_COMMAND_CURVE: {
const struct nk_command_curve *q = (const struct nk_command_curve *)cmd;
color = nk_color_to_allegro_color(q->color);
float points[8];
points[0] = (float)q->begin.x;
points[1] = (float)q->begin.y;
points[2] = (float)q->ctrl[0].x;
points[3] = (float)q->ctrl[0].y;
points[4] = (float)q->ctrl[1].x;
points[5] = (float)q->ctrl[1].y;
points[6] = (float)q->end.x;
points[7] = (float)q->end.y;
al_draw_spline(points, color, (float)q->line_thickness);
} break;
case NK_COMMAND_ARC: {
const struct nk_command_arc *a = (const struct nk_command_arc *)cmd;
color = nk_color_to_allegro_color(a->color);
al_draw_arc((float)a->cx, (float)a->cy, (float)a->r, a->a[0],
a->a[1], color, (float)a->line_thickness);
} break;
case NK_COMMAND_RECT_MULTI_COLOR:
case NK_COMMAND_IMAGE:
case NK_COMMAND_ARC_FILLED:
default: break;
}
}
nk_clear(&allegro5.ctx);
}
NK_API void
nk_allegro5_handle_event(ALLEGRO_EVENT *ev)
{
struct nk_context *ctx = &allegro5.ctx;
//printf("nk_allegro5_handle_event: %d\n", ev->type);
switch (ev->type) {
case ALLEGRO_EVENT_MOUSE_AXES: {
nk_input_motion(ctx, ev->mouse.x, ev->mouse.y);
} break;
case ALLEGRO_EVENT_MOUSE_BUTTON_DOWN:
case ALLEGRO_EVENT_MOUSE_BUTTON_UP: {
if (ev->mouse.display != allegro5.dsp) {
return;
}
int button = NK_BUTTON_LEFT;
if (ev->mouse.button == 2) {
button = NK_BUTTON_RIGHT;
}
else if (ev->mouse.button == 3) {
button = NK_BUTTON_MIDDLE;
}
nk_input_button(ctx, button, ev->mouse.x, ev->mouse.y, ev->type == ALLEGRO_EVENT_MOUSE_BUTTON_DOWN);
} break;
case ALLEGRO_EVENT_KEY_DOWN:
case ALLEGRO_EVENT_KEY_UP: {
if (ev->keyboard.display != allegro5.dsp) {
return;
}
int kc = ev->keyboard.keycode;
int down = ev->type == ALLEGRO_EVENT_KEY_DOWN;
if (kc == ALLEGRO_KEY_LSHIFT || kc == ALLEGRO_KEY_RSHIFT) nk_input_key(ctx, NK_KEY_SHIFT, down);
else if (kc == ALLEGRO_KEY_DELETE) nk_input_key(ctx, NK_KEY_DEL, down);
else if (kc == ALLEGRO_KEY_ENTER) nk_input_key(ctx, NK_KEY_ENTER, down);
else if (kc == ALLEGRO_KEY_TAB) nk_input_key(ctx, NK_KEY_TAB, down);
else if (kc == ALLEGRO_KEY_LEFT) nk_input_key(ctx, NK_KEY_LEFT, down);
else if (kc == ALLEGRO_KEY_RIGHT) nk_input_key(ctx, NK_KEY_RIGHT, down);
else if (kc == ALLEGRO_KEY_UP) nk_input_key(ctx, NK_KEY_UP, down);
else if (kc == ALLEGRO_KEY_DOWN) nk_input_key(ctx, NK_KEY_DOWN, down);
else if (kc == ALLEGRO_KEY_BACKSPACE) nk_input_key(ctx, NK_KEY_BACKSPACE, down);
else if (kc == ALLEGRO_KEY_ESCAPE) nk_input_key(ctx, NK_KEY_TEXT_RESET_MODE, down);
else if (kc == ALLEGRO_KEY_PGUP) nk_input_key(ctx, NK_KEY_SCROLL_UP, down);
else if (kc == ALLEGRO_KEY_PGDN) nk_input_key(ctx, NK_KEY_SCROLL_DOWN, down);
else if (kc == ALLEGRO_KEY_HOME) {
nk_input_key(ctx, NK_KEY_TEXT_START, down);
nk_input_key(ctx, NK_KEY_SCROLL_START, down);
} else if (kc == ALLEGRO_KEY_END) {
nk_input_key(ctx, NK_KEY_TEXT_END, down);
nk_input_key(ctx, NK_KEY_SCROLL_END, down);
}
} break;
case ALLEGRO_EVENT_KEY_CHAR: {
int kc = ev->keyboard.keycode;
int control_mask = (ev->keyboard.modifiers & ALLEGRO_KEYMOD_CTRL) ||
(ev->keyboard.modifiers & ALLEGRO_KEYMOD_COMMAND);
if (kc == ALLEGRO_KEY_C && control_mask) {
nk_input_key(ctx, NK_KEY_COPY, 1);
} else if (kc == ALLEGRO_KEY_V && control_mask) {
nk_input_key(ctx, NK_KEY_PASTE, 1);
} else if (kc == ALLEGRO_KEY_X && control_mask) {
nk_input_key(ctx, NK_KEY_CUT, 1);
} else if (kc == ALLEGRO_KEY_Z && control_mask) {
nk_input_key(ctx, NK_KEY_TEXT_UNDO, 1);
} else if (kc == ALLEGRO_KEY_R && control_mask) {
nk_input_key(ctx, NK_KEY_TEXT_REDO, 1);
}
else {
if (ev->keyboard.keycode != ALLEGRO_KEY_BACKSPACE) {
printf("unicode: %c\n", ev->keyboard.unichar);
nk_input_unicode(ctx, ev->keyboard.unichar);
}
}
} break;
default: break;
}
}
// NK_API void
// nk_glfw3_char_callback(GLFWwindow *win, unsigned int codepoint)
// {
// (void)win;
// if (glfw.text_len < NK_GLFW_TEXT_MAX)
// glfw.text[glfw.text_len++] = codepoint;
// }
// NK_API void
// nk_gflw3_scroll_callback(GLFWwindow *win, double xoff, double yoff)
// {
// /*(void)win; (void)xoff;
// glfw.scroll += (float)yoff;*/
// }
NK_INTERN void
nk_allegro5_clipboard_paste(nk_handle usr, struct nk_text_edit *edit)
{
char *text = al_get_clipboard_text(allegro5.dsp);
if (text) nk_textedit_paste(edit, text, nk_strlen(text));
(void)usr;
al_free(text);
}
NK_INTERN void
nk_allegro5_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';
al_set_clipboard_text(allegro5.dsp, str);
free(str);
}
NK_API struct nk_context*
nk_allegro5_init(NkAllegro5Font *allegro5font, ALLEGRO_DISPLAY *dsp, unsigned int width, unsigned int height)
{
if (!al_init_primitives_addon()) {
fprintf(stdout, "Unable to initialize required allegro5 primitives addon\n");
exit(1);
}
struct nk_user_font *font = &allegro5font->nk;
font->userdata = nk_handle_ptr(allegro5font);
font->height = (float)allegro5font->height;
font->width = nk_allegro5_font_get_text_width;
allegro5.dsp = dsp;
allegro5.width = width;
allegro5.height = height;
nk_init_default(&allegro5.ctx, font);
allegro5.ctx.clip.copy = nk_allegro5_clipboard_copy;
allegro5.ctx.clip.paste = nk_allegro5_clipboard_paste;
allegro5.ctx.clip.userdata = nk_handle_ptr(0);
return &allegro5.ctx;
}
NK_API
void nk_allegro5_shutdown(void)
{
nk_free(&allegro5.ctx);
memset(&allegro5, 0, sizeof(allegro5));
}
#endif // NK_ALLEGRO5_IMPLEMENTATION