Add demo for glfw + opengl4 without any gl extensions

.github/workflows/ccpp.yml

@@ -19,8 +19,10 @@ jobs:
       run: make -C demo/glfw_opengl2
     - name: build glfw_opengl3
       run: make -C demo/glfw_opengl3
-    - name: build glfw_opengl4
-      run: make -C demo/glfw_opengl4
+    - name: build glfw_opengl4_core
+      run: make -C demo/glfw_opengl4_core
+    - name: build glfw_opengl4_ext
+      run: make -C demo/glfw_opengl4_ext
     - name: build glfw_vulkan
       run: make -C demo/glfw_vulkan
     - name: build sdl_opengl2

.gitignore

@@ -1,5 +1,6 @@
 demo/*/*/demo
 demo/*/bin/*
+demo/*/*/bin/*
 example/bin/*
 docs/xml
 docs/build

demo/glfw_opengl4_core/main.c

@@ -0,0 +1,231 @@
+/* nuklear - 1.32.0 - public domain */
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <stdarg.h>
+#include <string.h>
+#include <math.h>
+#include <assert.h>
+#include <limits.h>
+#include <time.h>
+
+#include <GL/glew.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_GL4_IMPLEMENTATION
+#include "../../nuklear.h"
+#include "nuklear_glfw_gl4.h"
+
+#define WINDOW_WIDTH 1200
+#define WINDOW_HEIGHT 800
+
+#define MAX_VERTEX_BUFFER 512 * 1024
+#define MAX_ELEMENT_BUFFER 128 * 1024
+
+/* ===============================================================
+ *
+ *                          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 defines */
+/*#define INCLUDE_ALL */
+/*#define INCLUDE_STYLE */
+/*#define INCLUDE_CALCULATOR */
+/*#define INCLUDE_CANVAS */
+#define INCLUDE_OVERVIEW
+/*#define INCLUDE_CONFIGURATOR */
+/*#define INCLUDE_NODE_EDITOR */
+
+#ifdef INCLUDE_ALL
+  #define INCLUDE_STYLE
+  #define INCLUDE_CALCULATOR
+  #define INCLUDE_CANVAS
+  #define INCLUDE_OVERVIEW
+  #define INCLUDE_CONFIGURATOR
+  #define INCLUDE_NODE_EDITOR
+#endif
+
+#ifdef INCLUDE_STYLE
+  #include "../../demo/common/style.c"
+#endif
+#ifdef INCLUDE_CALCULATOR
+  #include "../../demo/common/calculator.c"
+#endif
+#ifdef INCLUDE_CANVAS
+  #include "../../demo/common/canvas.c"
+#endif
+#ifdef INCLUDE_OVERVIEW
+  #include "../../demo/common/overview.c"
+#endif
+#ifdef INCLUDE_CONFIGURATOR
+  #include "../../demo/common/style_configurator.c"
+#endif
+#ifdef INCLUDE_NODE_EDITOR
+  #include "../../demo/common/node_editor.c"
+#endif
+
+/* ===============================================================
+ *
+ *                          DEMO
+ *
+ * ===============================================================*/
+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;
+    struct nk_context *ctx;
+    struct nk_colorf bg;
+    struct nk_image img;
+
+    #ifdef INCLUDE_CONFIGURATOR
+    static struct nk_color color_table[NK_COLOR_COUNT];
+    memcpy(color_table, nk_default_color_style, sizeof(color_table));
+    #endif
+
+    /* GLFW */
+    glfwSetErrorCallback(error_callback);
+    if (!glfwInit()) {
+        fprintf(stdout, "[GFLW] failed to init!\n");
+        exit(1);
+    }
+    glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 4);
+    glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 5);
+    glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
+#ifdef __APPLE__
+    glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE);
+#endif
+    win = glfwCreateWindow(WINDOW_WIDTH, WINDOW_HEIGHT, "Demo", NULL, NULL);
+    glfwMakeContextCurrent(win);
+    glfwGetWindowSize(win, &width, &height);
+
+    /* OpenGL */
+    glViewport(0, 0, WINDOW_WIDTH, WINDOW_HEIGHT);
+    glewExperimental = 1;
+    if (glewInit() != GLEW_OK) {
+        fprintf(stderr, "Failed to setup GLEW\n");
+        exit(1);
+    }
+    ctx = nk_glfw3_init(win, NK_GLFW3_INSTALL_CALLBACKS, MAX_VERTEX_BUFFER, MAX_ELEMENT_BUFFER);
+    /* 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);*/
+    /*struct nk_font *cousine = nk_font_atlas_add_from_file(atlas, "../../../extra_font/Cousine-Regular.ttf", 13, 0);*/
+    nk_glfw3_font_stash_end();
+    /*nk_style_load_all_cursors(ctx, atlas->cursors);*/
+    /*nk_style_set_font(ctx, &droid->handle);*/}
+
+    {int tex_index = 0;
+    enum {tex_width = 256, tex_height = 256};
+    char pixels[tex_width * tex_height * 4];
+    memset(pixels, 128, sizeof(pixels));
+    tex_index = nk_glfw3_create_texture(pixels, tex_width, tex_height);
+    img = nk_image_id(tex_index);}
+
+    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(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, nk_rgb_cf(bg), nk_vec2(nk_widget_width(ctx),400))) {
+                nk_layout_row_dynamic(ctx, 120, 1);
+                bg = nk_color_picker(ctx, bg, NK_RGBA);
+                nk_layout_row_dynamic(ctx, 25, 1);
+                bg.r = nk_propertyf(ctx, "#R:", 0, bg.r, 1.0f, 0.01f,0.005f);
+                bg.g = nk_propertyf(ctx, "#G:", 0, bg.g, 1.0f, 0.01f,0.005f);
+                bg.b = nk_propertyf(ctx, "#B:", 0, bg.b, 1.0f, 0.01f,0.005f);
+                bg.a = nk_propertyf(ctx, "#A:", 0, bg.a, 1.0f, 0.01f,0.005f);
+                nk_combo_end(ctx);
+            }
+        }
+        nk_end(ctx);
+
+        /* Bindless Texture */
+        if (nk_begin(ctx, "Texture", nk_rect(250, 150, 230, 250),
+            NK_WINDOW_BORDER|NK_WINDOW_MOVABLE|NK_WINDOW_SCALABLE|
+            NK_WINDOW_MINIMIZABLE|NK_WINDOW_TITLE))
+        {
+            struct nk_command_buffer *canvas = nk_window_get_canvas(ctx);
+            struct nk_rect total_space = nk_window_get_content_region(ctx);
+            nk_draw_image(canvas, total_space, &img, nk_white);
+        }
+        nk_end(ctx);
+
+        /* -------------- EXAMPLES ---------------- */
+        #ifdef INCLUDE_CALCULATOR
+          calculator(ctx);
+        #endif
+        #ifdef INCLUDE_CANVAS
+          canvas(ctx);
+        #endif
+        #ifdef INCLUDE_OVERVIEW
+          overview(ctx);
+        #endif
+        #ifdef INCLUDE_CONFIGURATOR
+          style_configurator(ctx, color_table);
+        #endif
+        #ifdef INCLUDE_NODE_EDITOR
+          node_editor(ctx);
+        #endif
+        /* ----------------------------------------- */
+
+        /* 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, 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_glfw3_render(NK_ANTI_ALIASING_ON);
+        glfwSwapBuffers(win);
+    }
+    nk_glfw3_shutdown();
+    glfwTerminate();
+    return 0;
+}
+