Create advanced_widgets.c

examples/advanced_widgets.c

@@ -0,0 +1,130 @@
+#define CGL_EXCLUDE_NETWORKING
+#define CGL_LOGGING_ENABLED
+#define CGL_IMPLEMENTATION
+#include "cgl.h"
+
+#define ASPECT_RATIO 1.0f // an aspect ratio on 1.0 will be needed since our sudoku game board will be a square
+
+static struct
+{
+    CGL_window* window; // the main window
+    int window_height;
+    int window_width;
+
+    CGL_framebuffer* framebuffer;
+} g_context;
+
+void key_callback(CGL_window* window, int key, int scancode, int action, int mods)
+{
+    if(action == CGL_PRESS)
+    {
+    }
+    else if(action == CGL_RELEASE)
+    {
+    }
+}
+
+
+bool setup_window()
+{
+    g_context.window_height = 400;
+    g_context.window_width = (int)(g_context.window_height * ASPECT_RATIO);
+    g_context.window = CGL_window_create(g_context.window_width, g_context.window_height, "Tests - Jaysmito Mukherjee"); // create the window
+    if(g_context.window == NULL) return false; // window creation failed
+    CGL_window_make_context_current(g_context.window); // make the opengl context for the window current
+    CGL_window_set_key_callback(g_context.window, key_callback);
+    return true; // window was successfully created
+}
+
+bool setup_framebuffer()
+{
+    g_context.framebuffer = CGL_framebuffer_create_from_default(g_context.window); // load the default framebuffer (0) into CGL_framebuffer object
+    if(g_context.framebuffer == NULL) return false; // failed
+    return true; // success
+}
+
+int main()
+{
+    srand((uint32_t)time(NULL));
+    if(!CGL_init()) return EXIT_FAILURE; // initialize CGL (required for setting up internals of CGL)
+    if(!setup_window()) return EXIT_FAILURE; //setup window
+    if(!CGL_gl_init()) return EXIT_FAILURE; // initialize cgl opengl module    
+    if(!setup_framebuffer()) return EXIT_FAILURE; //setup framebuffer
+    if(!CGL_widgets_init()) return EXIT_FAILURE; 
+
+
+    // the main loop
+    while(!CGL_window_should_close(g_context.window)) // run till the close button is clicked
+    {
+        // rendering
+        CGL_framebuffer_bind(g_context.framebuffer); // bind default framebuffer and also adjust viewport size and offset
+        CGL_gl_clear(0.2f, 0.2f, 0.2f, 1.0f); // clear screen with a dark gray color
+
+
+        CGL_widgets_begin();
+
+        srand(42);
+
+        CGL_widgets_set_fill_color(CGL_utils_random_color());
+        CGL_widgets_set_stroke_color(CGL_utils_random_color());
+        CGL_widgets_add_quad(
+            CGL_vec3_init(-0.5f, -0.5f,  0.0f),    
+            CGL_vec3_init( 0.5f, -0.5f,  0.0f),    
+            CGL_vec3_init( 0.5f,  0.5f,  0.0f),    
+            CGL_vec3_init(-0.5f,  0.5f,  0.0f)
+        );
+
+        CGL_widgets_set_fill_color(CGL_utils_random_color());
+        CGL_widgets_set_stroke_color(CGL_utils_random_color());
+        CGL_widgets_add_line(
+            CGL_vec3_init(0.1f, 0.1f, 0.0f),
+            CGL_vec3_init(0.8f, 0.8f, 0.0f)
+        );
+
+        CGL_widgets_set_fill_color(CGL_utils_random_color());
+        CGL_widgets_set_stroke_color(CGL_utils_random_color());
+        CGL_widgets_add_quad(
+            CGL_vec3_init(-0.1f, -0.2f,  0.0f),    
+            CGL_vec3_init( 0.2f, -0.3f,  0.0f),    
+            CGL_vec3_init( 0.4f,  0.2f,  0.0f),    
+            CGL_vec3_init(-0.3f,  0.8f,  0.0f)
+        );
+
+        CGL_widgets_set_fill_mode(false);
+        CGL_widgets_set_fill_color(CGL_utils_random_color());
+        CGL_widgets_set_stroke_color(CGL_utils_random_color());
+        CGL_widgets_add_quad(
+            CGL_vec3_init(-0.1f, -0.2f,  0.0f),    
+            CGL_vec3_init( 0.2f, -0.3f,  0.0f),    
+            CGL_vec3_init( 0.4f,  0.2f,  0.0f),    
+            CGL_vec3_init(-0.3f,  0.8f,  0.0f)
+        );
+
+
+        CGL_widgets_add_triangle(
+            CGL_vec3_init(-0.8f, -0.9f, 0.0f),
+            CGL_vec3_init(-0.6f, 0.6f, 0.0f),
+            CGL_vec3_init(-0.9f, 0.5f, 0.0f)
+        );
+
+        CGL_widgets_set_fill_mode(true);
+        CGL_widgets_add_circle(CGL_vec3_init(0.0f, 0.0f, 0.0f), 0.2f);
+
+        CGL_widgets_end();
+
+
+        CGL_window_swap_buffers(g_context.window); // swap framebuffers
+        CGL_window_poll_events(g_context.window); // poll events (if this is not called every frame window will stop responding)
+
+        if(CGL_window_get_key(g_context.window, CGL_KEY_ESCAPE) == CGL_PRESS) break; // quit on pressing escape
+    }
+
+    // cleanup
+    CGL_widgets_shutdown();
+    CGL_framebuffer_destroy(g_context.framebuffer); // destory framebuffer object
+    CGL_gl_shutdown(); // shutdown cgl opengl module
+    CGL_window_destroy(g_context.window); // destroy window
+    CGL_shutdown(); // shutdown cgl and clean up resources allocated by CGL internally (if any)
+    return EXIT_SUCCESS;
+}
+