[luminance-examples] Add a fixture to demonstrate #360.

integration-tests/desktop/src/main.rs

@@ -1,16 +1,16 @@
-mod gl33_f64_uniform;
-mod scissor;
-mod tess_no_data;
-
 use colored::Colorize as _;
 
 macro_rules! tests {
   ($($name:expr, $module:ident),*) => {
-    const TEST_NAMES: &[&str] = &[$(
-      $name
-      ),*
-    ];
+    // declare the modules for all tests
+    $(
+      mod $module;
+    )*
+
+    // list of all available integration tests
+    const TEST_NAMES: &[&str] = &[$( $name ),*];
 
+    // run a given test
     fn run_test(name: &str) {
       $(
         if name == $name {
@@ -33,7 +33,8 @@ macro_rules! tests {
 tests! {
   "gl33-f64-uniform", gl33_f64_uniform,
   "tess-no-data", tess_no_data,
-  "scissor-test", scissor
+  "scissor-test", scissor,
+  "360-manually-drop-framebuffer", manually_drop_framebuffer
 }
 
 fn main() {

integration-tests/desktop/src/manually_drop_framebuffer.rs

@@ -0,0 +1,27 @@
+//! <https://github.com/phaazon/luminance-rs/issues/360>
+//!
+//! When a framebuffer is created, dropped and a new one is created, the new framebuffer doesn’t
+//! seem to behave correctly. At the time of #360, it was detected on Windows.
+//!
+//! Because this example simply creates a framebuffer, drops it and creates another one, nothing is
+//! displayed and the window flashes on the screen. Run the application in a tool such as apitrace
+//! or renderdoc to analyze it.
+
+use luminance::context::GraphicsContext as _;
+use luminance::pixel::{Depth32F, RGBA32F};
+use luminance::texture::{Dim2, Sampler};
+use luminance_glfw::GlfwSurface;
+use luminance_windowing::WindowOpt;
+
+pub fn fixture() {
+  let mut surface =
+    GlfwSurface::new_gl33("fixture-360", WindowOpt::default()).expect("GLFW surface");
+
+  let framebuffer =
+    surface.new_framebuffer::<Dim2, RGBA32F, Depth32F>([1024, 1024], 0, Sampler::default());
+
+  std::mem::drop(framebuffer);
+
+  // #360 occurs here after the drop
+  let _ = surface.new_framebuffer::<Dim2, RGBA32F, Depth32F>([1024, 1024], 0, Sampler::default());
+}