Add `nuklear` example

nuklear/.gitignore

@@ -0,0 +1,6 @@
+test
+*.ttf
+
+nuklear_glfw_gl2.h
+stb_image.h
+canvas.c

nuklear/Makefile

@@ -0,0 +1,16 @@
+PROGRAM = test
+CC      = gcc
+CFLAGS  = -std=c99 -Wall -O2
+CFLAGS  += -I/home/user/Git/Nuklear
+LDFLAGS =
+LIBS    = -lglfw -lGL -lm -lGLU
+
+.PHONY: $(PROGRAM)
+
+all: $(PROGRAM)
+
+$(PROGRAM):
+	$(CC) $(CFLAGS) -o $@ main.c $(LIBS)
+
+clean:
+	rm -f $(PROGRAM)

nuklear/main.c

@@ -0,0 +1,130 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <stdarg.h>
+#include <string.h>
+#include <math.h>
+#include <assert.h>
+#include <limits.h>
+#include <time.h>
+
+#include <GLFW/glfw3.h>
+
+#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_GLFW_GL2_IMPLEMENTATION
+#define NK_KEYSTATE_BASED_INPUT
+#include <nuklear.h>
+#include "nuklear_glfw_gl2.h"
+
+#define WINDOW_WIDTH 230
+#define WINDOW_HEIGHT 250
+
+static void error_callback(int e, const char *d) {
+  printf("Error %d: %s\n", e, d);
+}
+
+int main(void) {
+  /* Platform */
+  static GLFWwindow *win;
+  int width = 0, height = 0;
+
+  /* GUI */
+  struct nk_context *ctx;
+  struct nk_colorf bg;
+
+  /* GLFW */
+  glfwSetErrorCallback(error_callback);
+  if (!glfwInit()) {
+    fprintf(stdout, "[GFLW] failed to init!\n");
+    exit(1);
+  }
+  win = glfwCreateWindow(WINDOW_WIDTH, WINDOW_HEIGHT, "Demo", NULL, NULL);
+  glfwMakeContextCurrent(win);
+  glfwGetWindowSize(win, &width, &height);
+
+  /* GUI */
+  ctx = nk_glfw3_init(win, NK_GLFW3_INSTALL_CALLBACKS);
+  /* 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_glfw3_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);*/
+    nk_rune ranges_latin[] = {
+    0x0020, 0x007E,     /* Ascii */
+    0x00A1, 0x00FF,     /* Symbols + Umlaute */
+    0x0410, 0x044F,     /* Main Cyrillic */
+    0
+};
+    struct nk_font_config cfg_japan = nk_font_config(0);
+    cfg_japan.range = ranges_latin;
+    struct nk_font *compassgold_font = nk_font_atlas_add_from_file(atlas, "Ubuntu-R.ttf", 18, 0, &cfg_japanm  );
+    nk_style_set_font(ctx, &compassgold_font->handle);
+    nk_glfw3_font_stash_end();
+  }
+
+    bg.r = 0.10f, bg.g = 0.18f, bg.b = 0.24f, bg.a = 1.0f;
+
+
+
+    while (!glfwWindowShouldClose(win)) {
+      /* Input */
+      glfwPollEvents();
+      nk_glfw3_new_frame();
+
+      /* GUI */
+      if (nk_begin(ctx, "Demo", nk_rect(0, 0, 230, 250), NK_WINDOW_BORDER)) {
+        enum { EASY, HARD };
+        static int op = EASY;
+        static char text[1][64];
+        static int text_len[3];
+
+        nk_layout_row_static(ctx, 30, 80, 1);
+        nk_label(ctx, "Введите URL", NK_TEXT_CENTERED);
+        nk_edit_string(ctx, NK_EDIT_FIELD, text[0], &text_len[2], 64, nk_filter_default);
+
+        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_end(ctx);
+
+      /* Draw */
+      glfwGetWindowSize(win, &width, &height);
+      glViewport(0, 0, width, height);
+      glClear(GL_COLOR_BUFFER_BIT);
+      glClearColor(bg.r, bg.g, bg.b, bg.a);
+      /* IMPORTANT: `nk_glfw_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_glfw3_render(NK_ANTI_ALIASING_ON);
+      glfwSwapBuffers(win);
+    }
+
+    nk_glfw3_shutdown();
+    glfwTerminate();
+    return 0;
+}