add startup branding

engine/v4k.c

@@ -26748,6 +26748,11 @@ bool window_create_from_handle(void *handle, float scale, unsigned flags) {
     int gl_version = gladLoadGL(glfwGetProcAddress);
     #endif
 
+    // set black screen
+    glClearColor(0,0,0,1);
+    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+    glfwSwapBuffers(window);
+
     glDebugEnable();
 
     // setup nuklear ui
@@ -29800,6 +29805,42 @@ static void v4k_post_init(float refresh_rate) {
 
     // display window
     glfwShowWindow(window);
+    
+    // set black screen
+    glClearColor(0,0,0,1);
+    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+    glfwSwapBuffers(window);
+    
+    texture_t logo_bg = texture("v4_logo_background.png", 0);
+    if (logo_bg.id != texture_checker().id) {
+        texture_t logo_mask = texture("v4_logo_mask.png", 0);
+        font_face(FONT_FACE3, "fonts/Montserrat-Regular.ttf", 48.0f, FONT_EU | FONT_4096 | FONT_OVERSAMPLE_X | FONT_OVERSAMPLE_Y);
+        sprite(logo_bg, vec3(w/2.f, h/2.f, 0).array, 0.0f, 0xFFFFFFFF, SPRITE_CENTERED|SPRITE_RESOLUTION_INDEPENDANT);
+        sprite(logo_mask, vec3(w/2.f, h/2.f, 1).array, 0.0f, 0xFFFFFFFF, SPRITE_CENTERED|SPRITE_RESOLUTION_INDEPENDANT);
+        sprite_flush();
+        font_print(
+            FONT_BOTTOM FONT_CENTER FONT_FACE3 FONT_H3
+            "Powered by V4K engine\n\n\n\n\n\n\n\n\n\n"
+        );
+
+        int year = 2024;
+        {
+            time_t now;
+            time(&now);
+            struct tm *local_time = localtime(&now);
+            year = local_time->tm_year + 1900;
+        }
+
+        char *legalese = va(FONT_CENTER FONT_FACE3 FONT_H4
+            "© %d v4.games. All rights reserved.\nAll other trademarks and copyrights\n" \
+            "are properties of their owners.\n\n\n\n", year);
+        vec2 dims = font_rect(legalese);
+        font_goto(0, window_height()-dims.y);
+        font_print(legalese);
+
+        glfwSwapBuffers(window);
+    }
+
     glfwGetFramebufferSize(window, &w, &h); //glfwGetWindowSize(window, &w, &h);
 
     randset(time_ns() * !tests_captureframes());